Bicycle five-way structure and bicycle frame

Abstract

The utility model discloses a bicycle five-way structure and a bicycle frame, the bicycle five-way structure comprises a five-way outer tube, and a five-way embedded sleeve used for installing a five-way bowl group is detachably arranged on the five-way outer tube. The bicycle five-way structure has the advantages that the five-way embedded sleeve is detachably installed on the five-way outer pipe, replacement is convenient, and the maintenance cost can be effectively reduced. The utility model further discloses a bicycle frame.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, in particular to a bicycle five-way structure and a bicycle frame. Background Art

[0002] The bottom bracket is the connection point between the front and rear triangles of the bicycle frame and the installation point of the sprocket and the bottom bracket bearing. During the production process of the frame, the bottom bracket will be set according to the different installation requirements of the sprocket specifications. The two ends of the bottom bracket are usually milled with teeth to facilitate the installation of the bottom bracket kit, but the teeth will wear out during use. Once the teeth are damaged, the sprocket will slip, which will bring safety hazards to riding.

[0003] The five-way structure of an existing bicycle frame is generally integrated with the frame. Once the thread pattern of the five-way is damaged, the entire frame needs to be replaced, which is extremely costly and inconvenient for consumers.

[0004] In view of this, the purpose of the utility model is to provide a new technical solution to solve the existing technical problems. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a bicycle five-way bracket structure and a bicycle frame, which solves the problems that the existing five-way bracket teeth are easily worn and threaded, and cannot be replaced separately.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A bicycle five-way structure comprises a five-way outer tube, on which a five-way inner nest for installing a five-way bowl set is detachably provided.

[0008] In the above structure, the outer periphery of the five-way inner nest is uniformly provided with limiting ridges, the inner periphery of the five-way outer tube is provided with five-way grooves whose shape and size match the limiting ridges and correspond one to one, and the five-way outer tube is provided with fixing parts for fixing the inner nest.

[0009] In the above structure, the fixing member is a fixing screw, a limiting groove is provided on the limiting ridge, and the fixing screw is threadedly connected to the five-way outer tube and clamped in the limiting groove.

[0010] In the above structure, the five-way joint is nested and integrally formed with the limiting ridge.

[0011] In the above structure, the outer diameter of the five-way inner nest is consistent with the inner diameter of the five-way outer tube.

[0012] In the above structure, the inner walls at both ends of the nested bottom bracket are provided with threads for mounting the bottom bracket bowl set.

[0013] The utility model also provides a bicycle frame, comprising a bicycle five-way structure of the structure as described above, and also comprising a head tube, an upper tube, a middle tube, a lower tube and a rear fork, wherein one end of the upper tube is fixedly connected to the middle tube, and the other end is fixedly connected to the head tube, one end of the lower tube is fixedly connected to the middle tube, and the other end is fixedly connected to the head tube, one side of the rear fork is connected to the middle tube, and the five-way outer tube is fixedly connected to the connection between the middle tube, the lower tube and the rear fork.

[0014] In the above structure, the rear fork includes a seat fork, a chain fork and a rear hook, the seat fork includes a first seat fork and a second seat fork, one end of the first seat fork and one end of the second seat fork are respectively fixedly arranged on the side of the middle tube away from the five-way outer tube, the chain fork includes a first chain fork and a second chain fork, one end of the first chain fork and one end of the second chain fork are respectively fixedly connected to the five-way outer tube, connecting seats are respectively connected between the first seat fork and the first chain fork and between the second seat fork and the second chain fork, and the two rear hooks are respectively detachably fixed to the connecting seats on both sides.

[0015] The beneficial effect of the utility model is that by providing a detachable five-way structure, the five-way inner nest is detachably arranged in the five-way outer tube, and when the teeth of the five-way inner nest are worn, the five-way inner nest can be directly replaced without replacing the entire bicycle frame, effectively saving maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the overall structure of the bicycle frame in the utility model;

[0018] Figure 2 It is a schematic diagram of the connection between the bicycle frame and the bicycle five-way structure in the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of a bicycle five-way structure in the utility model.

[0020] Figure numerals: 1, five-way outer tube; 11, fixing screw; 12, five-way groove; 2, five-way inner nest; 21, limiting ridge; 211, limiting groove; 22, tooth pattern; 3, head tube; 4, upper tube; 5, lower tube; 6, middle tube; 7, rear fork; 71, seat fork; 711, first seat fork; 712, second seat fork; 72, chain fork; 721, first chain fork; 722, second chain fork; 73, connecting seat; 74, rear hook. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-3 The utility model is further described.

[0022] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0023] Reference Figures 1 to 3 A bicycle five-way structure comprises a five-way outer tube 1 and a five-way inner nest 2, wherein the five-way outer tube 1 is a hollow tubular structure, the five-way inner nest 2 can be detachably installed in the five-way outer tube 1, and a five-way bowl set is installed in the five-way inner nest 2. Specifically, the five-way inner nest 2 is a hollow tubular structure, and a limiting rib 21 is arranged on the outer peripheral side of the five-way inner nest 2. A five-way groove 12 is opened on the inner wall of the five-way outer tube 1. The five-way groove 12 is arranged correspondingly to the limiting rib 21, and the shape and size of the limiting groove are consistent with the shape and size of the limiting rib 21. The limiting rib 21 cooperates with the five-way groove 12 to limit and fix the five-way inner nest 2, so that the five-way inner nest 2 does not rotate relative to each other after being installed in the five-way outer tube 1. Threads 22 are milled on the inner walls of both ends of the five-way inner nest 2, and the five-way bowl set is installed and connected to the five-way structure through the thread 22.

[0024] In this embodiment, four limiting ribs 21 are evenly arranged in an array on the outer peripheral side of the five-way inner nest 2, and the inner wall of the five-way outer tube 1 is provided with a five-way groove 12 corresponding to the four limiting ribs 21. Four groups of corresponding limiting ribs 21 and five-way grooves 12 are arranged in an array to limit the four sides of the five-way inner nest 2, effectively ensuring the reliability of the connection between the five-way inner nest 2 and the five-way outer tube 1. The limiting ribs 21 and the five-way inner nest 2 are integrally formed, which is conducive to ensuring the connection rigidity between the limiting ribs 21 and the five-way inner nest 2, and effectively reducing the possibility of safety hazards caused by the separation of the limiting ribs 21 from the five-way inner nest during use. In actual settings, the number of limiting ribs 21 and the five-way grooves 12 can be set as needed, and no specific limitation is made here.

[0025] Reference Figure 2 and Figure 3The outer diameter of the five-way inner nest 2 is matched with the inner diameter of the five-way outer tube 1, that is, the five-way inner nest 2 can be just inserted and installed in the five-way outer tube 1. This arrangement maximizes the contact area between the five-way inner nest 2 and the five-way outer tube 1, and the friction between the two is also maximized, which can effectively reduce the possibility of relative sliding or rotation between the five-way inner nest 2, so as to further ensure the connection stability between the five-way outer tube 1 and the five-way inner nest 2.

[0026] A fixing piece is provided on the five-way outer tube 1, and the fixing piece is used to fix the inner nest. Specifically, the fixing piece is a fixing screw 11, and a protruding nut is provided on the five-way outer tube 1. A limiting groove 211 corresponding to the position of the protruding nut is provided on the limiting ridge 21. The fixing screw 11 is threadedly connected to the protruding nut, and the end of the fixing screw 11 is stuck in the limiting groove 211. By the cooperation of the fixing screw 11 and the limiting groove 211, the axial movement of the five-way inner nest 2 is restricted, and the five-way inner nest 2 is fully fixed, which can effectively reduce the possibility of axial sliding of the five-way inner nest 2 in the five-way outer tube 1, and further improve the connection reliability between the five-way inner nest 2 and the five-way outer tube 1. In actual production applications, the number of fixing screws 11 and limiting grooves 211 can be set according to demand, and is not specifically limited here.

[0027] When installing the bottom bracket inner nest 2, first use a special tool to drive the bottom bracket inner nest 2 into the bottom bracket outer tube 1, and then lock the fixing screw 11 into the bottom bracket outer tube 1 to lock and fix the bottom bracket inner nest 2. When the tooth pattern 22 of the bottom bracket inner nest 2 is damaged, only the bottom bracket inner nest 2 of the corresponding model needs to be replaced, which effectively reduces the maintenance cost.

[0028] The utility model also provides a bicycle frame, comprising the bicycle five-way structure of the structure as described above, and also comprising a head tube 3, an upper tube 4, a middle tube 6, a lower tube 5 and a rear fork 7. One end of the upper tube 4 is fixedly connected to the middle tube 6, and the other end is fixedly connected to the head tube 3; one end of the lower tube 5 is fixedly connected to the middle tube 6, and the other end is fixedly connected to the head tube 3, and the upper tube 4, the lower tube 5 and the middle tube 6 constitute a front triangle structure of the bicycle frame. The rear fork 7 and the middle tube 6 constitute a rear triangle structure of the bicycle frame, and the bicycle five-way structure is arranged at the connection between the front triangle and the rear triangle.

[0029] Specifically, the five-way outer tube 1 is fixedly connected to one end of the middle tube 6 away from the upper tube 4. The rear fork 7 includes a rear seat fork 71, a rear chain fork 72 and a rear hook 74, wherein the rear seat fork 71 includes a first rear seat fork 711 and a second rear seat fork 712, one end of the first rear seat fork 711 is fixedly connected to the side of the middle tube 6 away from the five-way outer tube 1, one end of the second rear seat fork 712 is also fixedly connected to the side of the middle tube 6 away from the five-way outer tube 1, and the first rear seat fork 711 and the second rear seat fork 712 are axially symmetrically arranged along the middle tube 6; the chain fork 72 includes a first chain fork 721 and a second chain fork 722, one end of the first chain fork 721 is fixedly connected to the five-way outer tube 1, one end of the second chain fork 722 is also fixedly connected to the five-way outer tube 1, and the first chain fork 721 and the second chain fork 722 are axially symmetrically arranged along the middle tube 6. A connecting seat 73 is fixedly connected between the first seat fork 711 and the first chain fork 721 and between the second seat fork 712 and the second chain fork 722. Two rear hooks 74 are detachably fixed to the connecting seats 73 on both sides, and the two rear hooks 74 are symmetrically arranged.

[0030] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A bicycle bottom bracket structure, characterized in that: It comprises a five-way outer tube, on which a five-way inner nest for installing a five-way bowl set is detachably provided.

2. A bicycle bottom bracket structure according to claim 1, characterized in that: The outer periphery of the five-way inner nest is uniformly provided with limiting ridges, the inner periphery of the five-way outer tube is provided with five-way grooves with shapes and sizes matching the limiting ridges and corresponding one to one, and the five-way outer tube is provided with fixing parts for fixing the inner nest.

3. A bicycle bottom bracket structure according to claim 2, characterized in that: The fixing member is a fixing screw, a limiting groove is provided on the limiting convex ridge, and the fixing screw is threadedly connected to the five-way outer tube and clamped in the limiting groove.

4. The bicycle bottom bracket structure according to claim 2, characterized in that: The five-way bracket is nested and integrally formed with the limiting convex ridge.

5. The bicycle bottom bracket structure according to claim 1, characterized in that: The outer diameter of the five-way inner nesting is consistent with the inner diameter of the five-way outer tube.

6. The bicycle bottom bracket structure according to claim 1, characterized in that: The inner walls at both ends of the five-way nest are provided with tooth patterns for installing the five-way bowl set.

7. A bicycle frame, comprising a head tube, an upper tube, a middle tube, a down tube and a rear fork, characterized in that: The bicycle five-way structure comprises the structure according to any one of claims 1 to 6, wherein one end of the top tube is fixedly connected to the middle tube, and the other end is fixedly connected to the head tube, one end of the down tube is fixedly connected to the middle tube, and the other end is fixedly connected to the head tube, one side of the rear fork is connected to the middle tube, and the five-way outer tube is fixedly connected to the connection between the middle tube, the down tube and the rear fork.

8. A bicycle frame according to claim 7, characterized in that: The rear fork includes a seat fork, a chain fork and a rear hook, the seat fork includes a first seat fork and a second seat fork, one end of the first seat fork and one end of the second seat fork are respectively fixedly arranged on a side of the middle tube away from the five-way outer tube, the chain fork includes a first chain fork and a second chain fork, one end of the first chain fork and one end of the second chain fork are respectively fixedly connected to the five-way outer tube, connecting seats are respectively connected between the first seat fork and the first chain fork and between the second seat fork and the second chain fork, and the two rear hooks are respectively detachably fixed to the connecting seats on both sides.

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