Rear fork chain guide

Abstract

The invention discloses a rear fork chain guide. A bicycle chain guide relates to the technical field of bicycle chain guides and is arranged on a bicycle frame, a flywheel, a rear fork and a fluted disc are arranged on the bicycle frame, the rear fork is arranged between the flywheel and the fluted disc, the flywheel and the fluted disc are rotatably arranged at the two ends of the rear fork respectively, the flywheel and the fluted disc are sleeved with a chain, a rear transmission is arranged on the side, close to the flywheel, of the rear fork, and a chain hooking device is arranged on the rear transmission. A chain sequentially passes through the fluted disc, the chain hooking device, the rear transmission and the flywheel, the chain guiding device comprises a chain guiding device body, the chain guiding device body is arranged on the side, away from the flywheel, of the rear fork and comprises a supporting part, a guiding seat and a connecting part, the guiding seat is arranged at one end of the supporting part, the chain is guided through the guiding seat, and the connecting part is arranged at the other end of the supporting part and connected with the supporting part. And a fixing hole is formed in the connecting part. By arranging the chain guide body, a chain can be guided, and friction loss caused by collision between the chain and a rear fork is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle chain guides, and more particularly to a rear fork chain guide. Background Art

[0002] Usually, the frame has a front fork and a rear fork, the front fork is mounted on the front wheel, and the rear fork is mounted on the rear wheel. The front wheel and the rear wheel roll in contact with a road surface, supporting the bicycle to move on the road surface. The bicycle has a chain connected at the head and tail, and the chain is sleeved on the outside of the sprocket and the flywheel. The flywheel is installed on one side of the rear wheel. The sprocket is configured with the frame, and the force of the sprocket is transmitted to the flywheel through the chain, driving the rear wheel to roll forward on the road surface. The length of the frame remains unchanged, and the front and rear wheels are separated by a long distance, which is not conducive to the transportation of the bicycle. In order to shorten the length of the bicycle, the existing technology improves the structure of the frame to make a folding bicycle.

[0003] However, the distance from the chainring to the flywheel is shortened due to the folding of the frame, which causes one tension of the chain to relax, resulting in a new problem of chain falling.

[0004] In order to solve the problem of chain falling, the existing technology uses a chain hook to hook the chain in an attempt to maintain the tension of the chain and prevent the chain from falling off the sprocket and the flywheel. However, it is inevitable that the chain hook hooks the chain and the chain may collide with the frame, causing friction loss, which again creates new problems.

[0005] Therefore, how to provide a rear fork chain guide that can effectively solve the loss caused by friction is an urgent problem that those skilled in the art need to solve. Summary of the invention

[0006] In view of this, the present invention provides a rear fork chain guide, which aims to solve one of the problems in the above-mentioned background technology and can effectively solve the loss caused by friction.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A rear fork chain guide is arranged on a bicycle frame, wherein a flywheel, a rear fork and a toothed disc are arranged on the bicycle frame, wherein the rear fork is arranged between the flywheel and the toothed disc, wherein the flywheel and the toothed disc are rotatably arranged at two ends of the rear fork, wherein a chain is sleeved on the flywheel and the toothed disc, wherein a rear transmission is arranged on a side of the rear fork close to the flywheel, wherein a chain hook is arranged on the rear transmission, wherein the chain passes through the toothed disc, the chain hook, the rear transmission and the flywheel in sequence, and further comprising:

[0009] A chain guide body, wherein the chain guide body is arranged on a side of the rear fork away from the flywheel, the chain guide body comprises a support portion, a guide seat and a connecting portion, the guide seat is arranged at one end of the support portion, the chain is guided by the guide seat, the connecting portion is arranged at the other end of the support portion, and a fixing hole is provided on the connecting portion.

[0010] Furthermore, the guide seat is composed of a bottom, an inner portion and an outer portion, the bottom is located between the inner portion and the outer portion, and a first opening 25 and a second opening are formed between the bottom, the inner portion and the outer portion.

[0011] Furthermore, the chain guide body also includes a baffle, which is obliquely arranged below the first opening 25, one end of the baffle is connected to the inner side portion, and the other end of the baffle is connected to the support portion, and the baffle and the support portion are an integrated structure.

[0012] Furthermore, the fixing hole of the connecting portion is fixedly connected to the connecting portion of the rear fork via a fastener.

[0013] Furthermore, a recess is provided on the side wall of the support portion close to the second opening, and the recess is adapted to fit the rear fork.

[0014] Furthermore, the support portion and the outer portion are located on the same side.

[0015] Furthermore, the chain enters the guide seat from the second opening, and the chain leaves the guide seat from the first opening 25 .

[0016] It can be seen from the above technical solution that, compared with the prior art, the present invention discloses a rear fork chain guide, which can guide the chain by setting a chain guide body to avoid collision between the chain and the rear fork, and can effectively solve the problem of wear and tear of the chain and the rear fork caused by collision and friction. It has a simple structure and is easy to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of the rear fork chain guide provided by the present invention installed on a bicycle frame;

[0019] Figure 2 A schematic diagram of the structure of the rear fork chain guide provided by the present invention;

[0020] Figure 3 A schematic structural diagram of a rear fork chain guide provided by the present invention (from another perspective);

[0021] Figure 4 A side view of the chain guide body provided by the present invention;

[0022] Figure 5 A top view of the chain guide body provided by the present invention;

[0023] Figure 6 This is a schematic structural diagram of the chain guide body and the chain hook provided by the present invention cooperating with the guide chain.

[0024] Among them: 10 is a frame; 11 is a rear fork; 12 is a flywheel; 13 is a rear transmission; 14 is a sprocket; 15 is a chain; 16 is a chain hook; 17 is a connecting portion; 18 is a fastener; 20 is a chain guide body; 21 is a guide seat; 22 is a bottom; 23 is an inner side; 24 is an outer side; 25 is a first opening 25; 26 is a second opening; 27 is a baffle; 28 is a supporting portion; 29 is a connecting portion; 30 is a fixing hole; 31 is a recessed portion. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-6 The embodiment of the present invention discloses a rear fork chain guide, which is arranged on a frame 1. The frame 1 is provided with a flywheel 12, a rear fork 11 and a toothed disc 14. The rear fork 11 is arranged between the flywheel 12 and the toothed disc 14. The flywheel 12 and the toothed disc 14 are rotatably arranged at both ends of the rear fork 11. A chain 15 is sleeved on the flywheel 12 and the toothed disc 14. A rear transmission is arranged on a side of the rear fork 11 close to the flywheel 12. A chain hook 16 is arranged on the rear transmission. The chain 15 passes through the toothed disc 14, the chain hook 16, the rear transmission and the flywheel 12 in sequence. The invention also includes:

[0027] The chain guide body 20 is arranged on the side of the rear fork 11 away from the flywheel 12. The chain guide body 20 includes a support portion 27, a guide seat 21 and a connecting portion 29. The guide seat 21 is arranged at one end of the support portion 27, and the chain 15 is guided by the guide seat 21. The connecting portion 29 is arranged at the other end of the support portion 27, and a fixing hole 30 is provided on the connecting portion 29: the tension of the chain 15 is changed through the rear transmission, so that the chain 15 can adapt to flywheels 12 of different diameters and change the rotation speed of the rear wheel; the chain 15 circulates on the flywheel 12 and the sprocket 14, and the chain hooker 16 hooks the chain 15 for guiding, and guides the chain 15 to the guide seat 21 of the chain guide body 20, and the chain 15 and the rear fork 11 are separated by the chain guide body 20 to avoid loss caused by collision.

[0028] In this embodiment, the guide seat 21 is composed of a bottom 22, an inner portion 23 and an outer portion 24, the bottom 22 is located between the inner portion 23 and the outer portion 24, and a first opening and a second opening 26 are formed between the bottom 22, the inner portion 23 and the outer portion 24: the first opening and the second opening 26 are connected to form an open groove for the chain 15 to pass through.

[0029] In this embodiment, the chain guide body 20 further includes a baffle 27, which is obliquely arranged below the first opening, one end of the baffle 27 is connected to the inner portion 23, and the other end of the baffle 27 is connected to the support portion 27, and the baffle 27 and the support portion 27 are an integrated structure.

[0030] In this embodiment, the fixing hole 30 of the connecting portion 29 is fixedly connected to the connecting portion 17 of the rear fork 11 by a fastener 18 : the fixing hole 30 is configured as a fisheye hole.

[0031] In this embodiment, a recess 31 is provided on the side wall of the support portion 27 close to the second opening 26 , and the recess 31 is adapted to the rear fork 11 ; the recess 31 is bonded to the side surface of the rear fork 11 , so that the chain guide body 20 is attached to the rear fork 11 .

[0032] In this embodiment, the support portion 27 and the outer portion 24 are located on the same side.

[0033] In this embodiment, the chain 15 enters the guide seat 21 from the second opening 26 , and the chain 15 leaves the guide seat 21 from the first opening.

[0034] How it works

[0035] The chain guide body 20 is adjacent to the sprocket 12 and falls within the surrounding range of the chain 15:

[0036] Normally, the chain guide body 20 does not interfere with the circular motion of the chain 15; when the frame 1 is folded, the chain hook 16 hooks the chain 15 to prevent the tension from relaxing, and the chain 15 meshes with the sprocket 14 and the flywheel 12, and still maintains the transmission relationship;

[0037] The chain hook 16 hooks the chain 15, and the chain 15 falls into the chain guide body 20 and intersects with the rear fork 11 (refer to Figure 6 ), the chain 15 enters the guide seat 21 from the second opening 26, and the chain 15 leaves the guide seat 21 from the first opening. The chain guide body 20 separates the chain 15 and the rear fork 11 to avoid unnecessary friction loss caused by collision between the two.

[0038] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0039] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rear fork chain guide, arranged on a bicycle frame, the frame is provided with a flywheel, a rear fork and a toothed disc, the rear fork is arranged between the flywheel and the toothed disc, the flywheel and the toothed disc are rotatably arranged at both ends of the rear fork, a chain is sleeved on the flywheel and the toothed disc, a rear transmission is arranged on a side of the rear fork close to the flywheel, a chain hook is arranged on the rear transmission, the chain passes through the toothed disc, the chain hook, the rear transmission and the flywheel in sequence, characterized in that: include: A chain guide body, wherein the chain guide body is arranged on a side of the rear fork away from the flywheel, the chain guide body comprises a support portion, a guide seat and a connecting portion, the guide seat is arranged at one end of the support portion, the chain is guided by the guide seat, the connecting portion is arranged at the other end of the support portion, and a fixing hole is provided on the connecting portion.

2. A rear fork chain guide according to claim 1, characterized in that: The guide seat is composed of a bottom, an inner portion and an outer portion, wherein the bottom is located between the inner portion and the outer portion, and a first opening 25 and a second opening are formed between the bottom, the inner portion and the outer portion.

3. A rear fork chain guide according to claim 2, characterized in that: The chain guide body further includes a baffle, which is obliquely disposed below the first opening 25 , one end of which is connected to the inner portion, and the other end of which is connected to the support portion, and the baffle and the support portion are an integrated structure.

4. A rear fork chain guide according to claim 1, characterized in that: The fixing hole of the connecting part is fixedly connected to the connecting part of the rear fork by a fastener.

5. A rear fork chain guide according to claim 2, characterized in that: A recess is provided on the side wall of the support portion close to the second opening, and the recess is adapted to the rear fork.

6. A rear fork chain guide according to claim 2, characterized in that: The support portion and the outer portion are located on the same side.

7. A rear fork chain guide according to claim 1, characterized in that: The chain enters the guide seat from the second opening, and the chain leaves the guide seat from the first opening 25 .

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