Oil way pre-embedding structure of bicycle frame, handle connecting structure and bicycle

Abstract

The utility model discloses an oil path pre-embedded structure of a bicycle frame, a handle connecting structure and a bicycle, the oil path pre-embedded structure comprises a frame body, a handle connecting structure, a handle connecting structure and a handle connecting structure, the frame body is composed of a plurality of pipe fittings, and the pipe fittings are defined by pipe walls; the oil conveying pipe is fixedly arranged in at least one pipe fitting of the frame body, the oil conveying pipe has the extending direction consistent with that of the pipe fitting, and the outer side surface of the oil conveying pipe is connected with the pipe wall of the pipe fitting in an attached mode; every two pipe joints correspondingly communicate with the two ends of one oil conveying pipe, the pipe joints are fixedly arranged on the pipe wall of the pipe fitting and exposed out of the pipe fitting, and the pipe joints and the oil conveying pipes are fixedly connected in a sealed mode through inserting cores which are arranged on the pipe joints, stretch into the oil conveying pipes and are in interference fit with the inner walls of the oil conveying pipes. According to the oil way pre-embedded structure, a brake line does not need to be arranged on the frame in a penetrating mode in the later period, and the assembling difficulty is lowered.

Description

Technical Field

[0001] This utility model relates to the field of bicycle cable routing technology, specifically to a pre-embedded oil circuit structure for a bicycle frame, a handlebar connection structure, and a bicycle. Background Technology

[0002] Currently, bicycle brake lines are generally exposed outside the frame, which affects both the lifespan of the brake lines and the aesthetics of the bicycle. To address this, existing technology proposes a wiring method that places the brake lines inside the frame. This method typically involves multiple corresponding openings on the frame. Utilizing the hollow structure of the frame, the brake lines are threaded through one opening and emerge from the other, thus concealing the brake lines within the frame. However, this internal wiring method requires subsequent assembly of the brake lines, and the complex shape of bicycle frames makes the installation and routing of the brake lines quite challenging. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects or problems in the background art and provide a pre-embedded oil circuit structure for a bicycle frame, a handlebar connection structure and a bicycle. The pre-embedded oil circuit structure eliminates the need to install brake lines in the frame later, reducing the assembly difficulty.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Technical Solution 1: A pre-embedded oil circuit structure for a bicycle frame, comprising: a frame body composed of several tubular components, the tubular components being enclosed by tubular walls; an oil supply pipe, wherein at least one of the tubular components of the frame body has the oil supply pipe fixedly disposed therein, the oil supply pipe having an extension direction consistent with the tubular component, and the outer surface of the oil supply pipe being in close contact with the tubular wall of the tubular component; a pipe joint, wherein every two pipe joints are correspondingly connected to the two ends of one oil supply pipe, the pipe joint being fixed to the tubular wall of the tubular component and protruding from the outer side of the tubular component; the pipe joint and the oil supply pipe are sealed and fixedly connected by a insert disposed in the pipe joint, extending into the oil supply pipe and interference-fitted with the inner wall of the oil supply pipe.

[0006] Technical Solution 2 based on Technical Solution 1: In the fitting that is fixed with the oil pipeline, a hollow installation channel is provided in the inner wall of the fitting along the extension direction of the oil pipeline; the oil pipeline is located in the installation channel and is fitted and connected to the inner wall of the installation channel.

[0007] Technical Solution 3 based on Technical Solution 2: The fitting fixed to the oil pipeline is made of carbon fiber material, and the oil pipeline and the installation channel are co-cured and formed.

[0008] Technical Solution 4 based on Technical Solution 2: The pipe wall of the fitting is recessed and has a countersunk hole; the pipe joint is embedded in the countersunk hole and is fitted and connected to the inner wall of the countersunk hole.

[0009] Technical Solution 5 based on Technical Solution 4: The pipe fitting fixed to the oil pipeline is made of carbon fiber material, and the pipe joint and the counterbore are co-cured and formed.

[0010] Technical Solution Six based on Technical Solution Four: The inner wall of the countersunk hole and the outer wall of the pipe joint are stepped in a corresponding manner.

[0011] Technical solution seven based on technical solution one: The frame body is provided with fittings including head tube, lower tube, front fork tube, rear lower fork tube and / or handlebar tube.

[0012] Technical solution eight based on technical solution seven: In the vehicle frame body, at least some of the directly fixedly connected pipes are integral structures, and in at least two pipes of integral structure and with the oil supply pipe fixedly installed, the oil supply pipe is continuously and uninterruptedly laid in the two pipes.

[0013] Technical solution nine based on technical solution seven: In the vehicle frame body, at least some of the directly fixedly connected pipes are split structures. In at least two pipes of the split structure and with the oil supply pipe fixed thereon, the two pipes are connected by their respective pipe joints to form a connection of the oil supply pipe.

[0014] Technical Solution 10 based on Technical Solution 9: The two pipe fittings are connected in a male-female plug-in manner.

[0015] In addition, this utility model also provides technical solution eleven: a bicycle frame handlebar connection structure, which is based on the pre-embedded oil circuit structure of the bicycle frame as described in any one of technical solutions one to ten. The head tube and handlebar tube of the frame body are both fixedly provided with the oil supply pipe and pipe joint, and it also includes a headset and an oil supply jumper cable. The handlebar tube is rotatably installed on the head tube through the headset. The oil supply jumper cable includes an oil supply hose and two oil supply joints. The two oil supply joints are fixedly connected to both ends of the oil supply hose and respectively connected to the pipe joints on the handlebar tube and the head tube that communicate with the oil supply pipe inside them.

[0016] Technical solution 12 based on technical solution 11: The upper cover of the head cup assembly is provided with a first clearance hole extending circumferentially and in an arc shape along its axial direction; the head tube is provided with a second clearance hole in an arc shape corresponding to the first clearance hole; the oil delivery hose of the oil delivery jumper passes through the first clearance hole and the second clearance hole.

[0017] In addition, this utility model also provides technical solution thirteen: a bicycle, which includes a frame, wherein the frame adopts the oil circuit pre-embedded structure of the bicycle frame as described in any one of technical solutions one to ten.

[0018] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:

[0019] Technical solution one provides a pre-embedded oil circuit structure for a bicycle frame. By setting oil pipes and pipe joints on the frame body, the bicycle's brake lines are not only hidden inside the frame, but also eliminate the need to thread wires inside the frame, greatly reducing the assembly difficulty.

[0020] The design of the fuel line and connector incorporates two key technologies: completely securing the fuel line to the inner wall of the pipe body, and forming a sealed connection between the connector and the fuel line using a mandrel. These two technologies complement and work synergistically to address the challenges of concealing brake wiring within the vehicle frame. Specifically, after completely securing the fuel line to the inner wall of the pipe body, the challenge lies in achieving a sealed connection between the fuel line and the connector. In similar technical fields, there are methods where the end of the fuel line is directly connected to the connector; however, this method clearly fails to create an effective seal. Furthermore, in this approach, the fuel line is completely fixed to the inner wall of the pipe body, thus the end position is fixed, and the outer wall of the fuel line needs to be flush with the inner wall, making it difficult to cover the outside of the connector. This technical solution addresses this issue by… By setting a plug on the pipe fitting, the pipe fitting forms a sealed fit with the oil pipe from the inside. The interference fit causes elastic deformation of the oil pipe or plug, depending on the material of the oil pipe or plug. This elastic deformation fills the gap between the outer surface of the plug and the inner wall of the oil pipe. An effective seal can be formed between the pipe fitting and the oil pipe without the use of a sealing ring. Furthermore, a fixed connection can be formed between the pipe fitting and the oil pipe. The pipe fitting is not only fixedly installed on the pipe wall, but also further fixed to the pipe of the frame body through the fixed connection with the oil pipe.

[0021] However, since the pipe fitting and the oil pipeline are fixedly connected in the extending direction, and the pipe fitting is fixed to the pipe wall of the fitting, if the oil pipeline is not fixed in the fitting, the movement of the oil pipeline within the fitting can easily cause the connection between the pipe fitting and the pipe wall to loosen. This, in turn, can affect the fit between the pipe fitting and the oil pipeline, and after prolonged use, the pipe fitting can easily detach from the pipe wall. Therefore, in this technical solution, the oil pipeline is further fixed inside the pipe wall of the pipe body. This arrangement not only conceals the oil pipeline inside the pipe body, but also, because the position of the oil pipeline is fixed, it will not move within the pipe body, thus not affecting the connection between the pipe fitting and the pipe wall. Furthermore, in this technical solution, the oil pipeline is not only fixedly connected to the pipe wall at the connection point with the pipe joint, but the entire oil pipeline is fixedly connected to the pipe wall. This arrangement further ensures that the oil pipeline will not affect the pipe joint. At the same time, since the entire oil pipeline no longer shakes, material fatigue caused by shaking and bending will not occur, thus ensuring a long service life for the oil pipeline. During its normal service life, the oil pipeline is not prone to damage, so there is no need to repair the fixedly connected oil pipeline, reducing maintenance costs.

[0022] Therefore, it can be seen that the installation method of the oil pipeline solves the sealing problem between the pipe fitting and the oil pipeline through the interference fit of the ferrule. At the same time, because the pipe fitting and the oil pipeline are connected by the interference fit of the ferrule, the pipe fitting is prone to detach from the pipe wall due to the shaking of the oil pipeline. Therefore, the oil pipeline is completely fixed inside the pipe wall. The two technical means are mutually causal and work together to solve the problems that occur when the oil circuit is pre-embedded inside the vehicle frame.

[0023] In technical solution two, a hollow installation channel is provided in the wall of the fitting with the fixed oil pipeline. The oil pipeline is placed in the installation channel and is fitted and connected to the inner wall of the installation channel. When the fitting is made of materials such as carbon fiber, the oil pipeline can be pre-placed in the middle of the multiple layers of carbon fiber that make up the fitting, and then formed together with the carbon fiber. At this time, the space occupied by the oil pipeline between the carbon fibers can form the aforementioned installation channel. Since the oil pipeline and the fitting are formed together, the outer wall of the oil pipeline can form a tight fit with the inner wall of the installation channel, and the oil pipeline is tightly wrapped and fixed by the installation channel. The pipe fitting can be fixed to the fitting during the fitting forming process, or after the fitting is formed, the pipe fitting can be fixed to the fitting and its insert can form an interference fit with the oil pipeline. This design not only reduces the assembly process of inserting the oil pipe into the frame later, but also ensures a strong connection between the oil pipe and the pipe body. Furthermore, the pipe wall structure is strong, and after the oil pipe is wrapped by the installation channel, the oil pressure it receives will be transmitted to the pipe wall. Therefore, the thickness of the oil pipe can be made thinner than that of conventional brake line oil pipes, further increasing the inner diameter of the oil pipe and facilitating the transmission of oil pressure.

[0024] In technical solution three, since the pipe fittings are made of carbon fiber, the oil pipeline and the installation channel can be co-cured and formed. The oil pipeline will not wobble in its radial direction, and it will also be fixed to the pipe wall in its extension direction. The oil pipeline will not slide back and forth in the installation channel, which can further prevent the pipe joint from loosening between itself and the pipe body due to the influence of the oil pipeline.

[0025] In technical solution four, the pipe wall of the fitting has a countersunk hole, and the pipe joint is embedded in the countersunk hole and closely connected to the inner wall surface of the countersunk hole. The countersunk hole provides a larger contact area between the pipe joint and the pipe wall of the fitting. Simultaneously, the inner circumferential wall of the countersunk hole can limit the pipe joint, ensuring it does not wobble circumferentially. Furthermore, the axial movement of the pipe joint, which is in the same direction as the extension of the oil pipeline, is limited because it is fixed to the oil pipeline, thus making the pipe joint less prone to loosening. Additionally, by providing a countersunk hole, the pipe joint does not need to protrude from the outer wall surface of the pipe, or only slightly protrudes from the outer wall surface, which not only facilitates the connection between pipe joints but also reduces the accumulation of dirt.

[0026] In technical solution five, since the pipe fittings are made of carbon fiber, the pipe joint and the countersunk hole can be co-cured and molded, making the connection between the pipe joint and the pipe wall more secure and reducing the risk of the pipe joint loosening.

[0027] In technical solution six, the inner wall of the countersunk hole and the outer wall of the pipe joint are stepped, and the contact area between the two is further increased by the fit between the steps, so that the pipe joint can be more firmly installed on the pipe wall.

[0028] In technical solution seven, multiple tubes in the frame body can be fixed with the aforementioned oil supply pipes and pipe joints, which facilitates the formation of a complete oil circuit within the frame body.

[0029] In technical solution eight, if the directly fixedly connected pipes in the frame body are an integral structure and both are equipped with oil pipes, then the oil pipes can be continuously laid between the two pipes without interruption. It is only necessary to set pipe joints on the two pipes corresponding to the two ends of the oil pipes.

[0030] In technical solution nine, if the directly fixedly connected pipes in the frame body are separate structures and each has an oil supply pipe, then each pipe has its own oil supply pipe section, and the connection of the oil supply pipes between the two pipes is achieved by the mating and matching of the pipe joints corresponding to their positions.

[0031] In technical solution ten, the two pipe fittings can be connected by a male-female plug-in method to form a mating relationship. The male-female plug-in method allows one pipe fitting to extend into the other pipe fitting, resulting in a tighter connection between the two.

[0032] Technical solution eleven provides a bicycle frame handlebar connection structure. Since the above-mentioned oil circuit pre-embedded structure is used in the bicycle frame, and the handlebar tube needs to rotate relative to the head tube after being assembled onto the head tube through the headset, the handlebar tube and the head tube cannot form a direct mating relationship through the above-mentioned connector. Therefore, in this technical solution, an oil supply jumper is provided. The oil supply jumper includes an oil supply hose and two oil supply connectors. The two oil supply connectors can be connected to the pipe connectors on the handlebar tube and the head tube respectively. Then, the two oil supply connectors are connected through the oil supply hose, thereby connecting the oil supply pipes on the handlebar tube and the head tube into one unit. With this configuration, when the handle tube rotates relative to the head tube, the pipe fitting on the handle tube will change position relative to the fitting on the head tube. However, the two are connected by an oil supply jumper, which provides leeway for the distance change caused by this positional change, allowing the handle tube to rotate freely without being restricted by the head tube. Furthermore, compared to directly mating the pipe fitting on the handle tube to the pipe fitting on the head tube and creating a rotational fit between the two fittings, the connection structure provided by this technical solution allows for a firm connection between the oil supply fitting and the pipe fitting. The positional change of the handle tube relative to the head tube is offset by the deformation of the oil supply fitting, thereby improving the stability of the oil supply connection between the handle tube and the head tube.

[0033] In technical solution 12, a first clearance hole and a second clearance hole are provided on the upper cover and head tube of the head headset, and the oil supply hose of the oil supply jumper passes through these two clearance holes. The clearance holes allow the oil supply hose to move between the clearance holes when the handle tube rotates relative to the head tube, thus avoiding interference between the head headset and the oil supply hose.

[0034] Technical solution thirteen provides a bicycle including a frame, wherein the frame adopts the above-mentioned oil circuit pre-embedded structure, the oil circuit of the bicycle is hidden in the frame, the appearance is simpler, and there is no need to assemble brake lines later, and the assembly difficulty is low. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the bicycle frame structure according to an embodiment of the present utility model;

[0037] Figure 2 for Figure 1 A schematic diagram of the chainstay tube of a bicycle frame;

[0038] Figure 3 for Figure 1 Schematic diagram of the front fork tube of a bicycle frame;

[0039] Figure 4 for Figure 1 A schematic diagram of the handlebar tubes of a bicycle frame;

[0040] Figure 5 This is a partial structural diagram of the handlebar tube in a bicycle frame according to an embodiment of the present utility model;

[0041] Figure 6 This is an exploded view of the bicycle frame structure according to an embodiment of the present invention;

[0042] Figure 7 for Figure 6 An enlarged schematic diagram of part A in the middle;

[0043] Figure 8 for Figure 6 Enlarged schematic diagram of part B;

[0044] Figure 9 This is a schematic diagram of the structure of the oil supply pipe and pipe connector of the bicycle frame according to an embodiment of the present utility model.

[0045] Explanation of key figure labels:

[0046] Frame body 10; tube 11; head tube 110; second clearance hole 1101; cover 1102; opening 1103; downtube 111; fork tube 112; chainstay tube 113; handlebar tube 114; tube wall 12; mounting channel 121; countersunk hole 13;

[0047] Oil pipeline 20;

[0048] Pipe fitting 30; insert 31; sealing ring 32;

[0049] Headset cup assembly 40; top cover 41; first clearance hole 42;

[0050] Oil transfer jumper 50; oil transfer hose 51; oil transfer connector 52;

[0051] Brake caliper 61; brake lever 62. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0053] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0054] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0055] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0056] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0057] In the claims, description and drawings of this utility model, the term "interference fit" or its variations means: in mechanical assembly, the actual size of the shaft is larger than the actual size of the hole, and a kind of fit in which pressure is generated between the two after assembly, and the algebraic difference between the hole and shaft sizes is negative.

[0058] In the claims, description and drawings of this utility model, the term "fitting connection" or its variations means: the surfaces of two or more objects are in close contact and are fitted together, usually relying on friction, clamping force, adhesive or the fit of their own shapes to achieve the connection, so that the parts form a whole to a certain extent and can jointly withstand external forces and other effects.

[0059] In the claims, description and the above drawings of this utility model, the term "step-like" or its variations mean that the surface (or outline) of an object presents a step-like shape, that is, it is composed of a series of planes (or approximate planes) of different heights (or depths) connected in sequence, with a significant height difference between each two adjacent planes, just like the steps of a staircase.

[0060] In the claims, description and drawings of this utility model, the term "butt" or its variations means: a method in which two joints achieve the functions of connecting, transmitting materials or signals by directly bringing their ends together so that the connecting parts of the joints are in close contact on the same axis.

[0061] In the claims, description and drawings of this utility model, the term "male and female plug-in" or its variations means that two elements having a protruding part (male head) and a corresponding recessed part (female head) are tightly joined together by inserting the male head into the female head, thereby realizing functions such as electrical connection, fluid transmission or mechanical fixation.

[0062] In the claims, description and drawings of this utility model, the term "rotational mounting" or its variations means that a component is mounted on another component in a manner that allows it to rotate about a certain axis, so that the component can perform circular motion relative to the mounting base during operation. This is commonly used in mechanical structures that require rotational functions, such as the mounting of a wheel on an axle.

[0063] Example

[0064] This utility model relates to a bicycle, as shown in the following embodiment. Figure 1 The illustration shows a portion of the bicycle, which mainly includes a frame, brake lever 62, and brake caliper 61. Other parts of the bicycle include components such as wheelset, seat, derailleur, pedals, and chain assembly, which can be constructed using conventional techniques in the art and will not be described in detail here.

[0065] The bicycle frame involved in this embodiment includes a frame body 10, a headset 40, an oil pipe 20, a pipe connector 30, an oil jumper cable 50, and related accessories. These accessories, such as bolts, are commonly used accessories during the assembly of the frame and will not be described in detail here.

[0066] The key feature of the bicycle involved in this embodiment is that its bicycle frame adopts the oil circuit pre-embedded structure and handlebar connection structure provided by this utility model. The following will describe the oil circuit pre-embedded structure and handlebar connection result in detail.

[0067] As one aspect of the bicycle involved in this embodiment, the oil circuit pre-embedded structure includes: a frame body 10, which is composed of a plurality of pipes 11, the pipes 11 being enclosed by pipe walls 12; an oil supply pipe 20, wherein the oil supply pipe 20 is fixedly disposed within at least one of the pipes 11 of the frame body 10, the oil supply pipe 20 having an extension direction consistent with the pipes 11, and the outer surface of the oil supply pipe 20 being in close contact with the pipe wall 12 of the pipes 11; and a pipe connector 30, wherein every two pipe connectors 30 are correspondingly connected to the two ends of an oil supply pipe 20, the pipe connector 30 being fixed to the pipe wall 12 of the pipes 11 and protruding from the outer side of the pipes 11, and having a core 31 extending into the oil supply pipe 20 and having an interference fit with the inner wall of the oil supply pipe 20.

[0068] Reference Figure 1 The frame body 10 includes several tubes 11, which can be integrally formed or assembled separately to form the frame body 10. In this embodiment, the tubes 11 of the frame body 10 are classified according to their position and shape, and according to conventional knowledge in the art, as head tube 110, down tube 111, top tube, seat tube, front fork tube 112, rear chainstay tube 113, rear upper fork tube, and handlebar tube 114. In this embodiment, the oil circuit in the pre-embedded oil circuit structure acts on the brake circuit. Therefore, in the frame body 10, the tubes 11 with oil supply pipes 20 and pipe connectors 30 fixedly installed include head tube 110, down tube 111, front fork tube 112, rear chainstay tube 113, and handlebar tube 114. Of course, in other embodiments, the oil supply pipe 20 and pipe connector 30 may be provided only in the pipe 11 used for setting the brake line in the part of the frame body 10, for example, only in one or more of the head tube 110, down tube 111, front fork tube 112, rear chainstay tube 113 or handlebar tube 114. In the pipe 11 where the oil supply pipe 20 and pipe connector 30 are not provided but the brake line still needs to be set, the existing external or internal wiring method can be used to connect with the pipe 11 with the oil supply pipe 20 and pipe connector 30 through the joint docking structure.

[0069] The pipe fitting 11 is formed by the pipe wall 12. See details below. Figure 9It shows a partial cross-sectional view of the head tube 110. The tube wall 12 may be formed as follows: Figure 9 The bending is shown, but overall, fitting 11 will still have a general direction of extension, as detailed in the reference. Figures 2 to 4 The diagram illustrates the construction of the rear chainstay tube 113, front fork tube 112, and handlebar tube 114. It should be noted that the extension direction referred to here is not a fixed straight line, but rather varies in curvature during the extension process according to actual needs. For example, the rear chainstay tube 113 may need to bend slightly outward near the center of the rear wheel assembly, or the handlebar tube 114 may need to be bent to form a structure that facilitates the rider's grip. It should be understood that in this specification and claims, tube 11 refers to a tubular component in the frame body 10, and tube wall 12 refers to the entity used to enclose each tube 11.

[0070] The pipe wall 12 of the fitting 11 can be made entirely of carbon fiber material, or of a composite material containing carbon fiber, such as with added glass fiber. Of course, in other embodiments, the pipe wall 12 of the fitting 11 can also be made of metal material, such as aluminum alloy.

[0071] In this embodiment, the oil supply pipe 20 is fixed inside the fitting 11 of the frame body 10, and the oil supply pipe 20 located inside the fitting 11 has the same extending direction as the fitting 11, and the outer surface of the oil supply pipe 20 is in close contact with the pipe wall 12 of the fitting 11. The oil supply pipe 20 may include a body made of engineering plastic or copper pipe, and a glass fiber layer or carbon fiber layer may be formed on the outer periphery of the body.

[0072] Reference Figure 9In the fitting 11, where the oil pipe 20 is fixed, a hollow installation channel 121 is provided inside the pipe wall 12 along the extension direction of the oil pipe 20. Specifically, when the fitting 11 is made of materials such as carbon fiber, the oil pipe 20 can be pre-placed in the middle of the multiple layers of carbon fiber that make up the fitting 11, and then formed together with the carbon fiber. At this time, the space occupied by the oil pipe 20 between the carbon fibers can form the aforementioned installation channel 121. Since the oil pipe 20 and the fitting 11 are formed together, the outer wall of the oil pipe 20 can form a tight fit with the inner wall of the installation channel 121, and the oil pipe 20 is tightly wrapped and fixed by the installation channel 121. The pipe connector 30 can be fixed to the fitting 11 during the forming process, or after the fitting 11 is formed, the pipe connector 30 can be fixed to the fitting 11 and its insert 31 can form an interference fit with the oil pipe 20. This design not only reduces the assembly process of inserting the oil pipe 20 into the frame later, but also allows for a strong connection between the oil pipe 20 and the pipe body. Furthermore, the pipe wall 12 of the fitting 11 has high structural strength. After the oil pipe 20 is wrapped by the installation channel 121, the oil pressure it receives will be transmitted to the pipe wall 12. Therefore, the thickness of the oil pipe 20 can be made thinner than that of conventional brake line oil pipes, further increasing the inner diameter of the oil pipe 20 and facilitating the transmission of oil pressure.

[0073] Alternatively, in other embodiments, the outer surface of the oil pipe 20 can be directly attached to the inner surface of the pipe wall 12. For example, during the forming process of the fitting 11, the oil pipe 20 is placed at the innermost position of the pipe wall 12, and then the oil pipe 20 and the fitting 11 are formed together. Because the fitting 11 is made of carbon fiber material, the outer layer of the oil pipe 20 can be directly connected to the inner surface of the pipe wall 12 during the thermoforming process.

[0074] Furthermore, the fitting 11, on which the oil pipe 20 is fixed, is made of carbon fiber, and the oil pipe 20 and the installation channel 121 are co-cured. With this configuration, the oil pipe 20 will not wobble radially, and it will also be fixedly connected to the pipe wall 12 in its extension direction. The oil pipe 20 will not slide back and forth in the installation channel 121, further preventing the pipe joint 30 from loosening due to the influence of the oil pipe 20 on the pipe body.

[0075] In this embodiment, each oil pipeline 20 is provided with two pipe joints 30. The two pipe joints 30 are fixed to the pipe wall 12 of the pipe fitting 11 and exposed on the outside of the pipe fitting 11. The two pipe joints 30 are connected to the two ends of the oil pipeline 20 respectively. The pipe joints 30 and the oil pipeline 20 are sealed and fixedly connected by inserts 31 provided in the pipe joints 30, extending into the oil pipeline 20 and interference fit with the inner wall of the oil pipeline 20.

[0076] The pipe fitting 11 has a recessed countersunk hole 13 in the pipe wall 12; the pipe connector 30 is embedded in the countersunk hole 13 and is fitted and connected to the inner wall of the countersunk hole 13.

[0077] Specifically, refer to Figure 9 A recessed countersunk hole 13 is provided on the outer surface of the pipe wall 12. The bottom of the countersunk hole 13 has a through hole penetrating the pipe wall 12, the position of which corresponds to the end position of the oil pipe 20 within the pipe wall 12. In a further embodiment, the end of the oil pipe 20 can be inserted into the through hole at the bottom of the countersunk hole 13 to limit its position. Corresponding to the countersunk hole 13, a pipe fitting 30 is embedded and fixed within it. The lower end of the pipe fitting 30 is provided with a core 31 extending axially. The core 31 is hollow inside and open at both ends. The core 31 can pass through the through hole at the bottom of the countersunk hole 13 and thus extend into the oil pipe 20. The outer diameter of the core 31 matches the inner diameter of the oil pipe 20, allowing the core 31 to form an interference fit with the oil pipe 20 after insertion. The countersunk hole 13 allows for a larger contact area between the pipe fitting 30 and the pipe wall 12 of the fitting 11. Simultaneously, the inner peripheral wall of the countersunk hole 13 limits the movement of the pipe fitting 30, preventing it from wobbling circumferentially. Furthermore, the axial movement of the pipe fitting 30, which is in the same direction as the extension of the oil pipe 20, is restricted due to its fixed connection with the oil pipe 20, making it less prone to loosening. Additionally, by providing the countersunk hole 13, the pipe fitting 30 does not need to protrude beyond the outer wall of the pipe wall 12, or only slightly protrudes, facilitating the connection between pipe fittings 30 and reducing dirt accumulation.

[0078] The pipe connector 30 can adopt a conventional connector structure. As a preferred option, the pipe connector 30 adopts a connector structure that can be adapted to a male-female mating fit. In the oil circuit pre-embedded structure provided by this utility model, the pipe connector 30 is used to form a mating with the pipe connectors 30 of other pipe fittings 11, or to form a mating with corresponding connectors of bicycle accessories, such as brake levers 62, brake calipers 61, etc. Preferably, the pipe connector 30 is made of a metal material with high hardness. The insert 31 is preferably integrally formed with the body of the pipe connector 30.

[0079] It should be understood that the bonding connection referred to in this specification and claims also includes connections formed by co-curing, in which case the surfaces of the oil pipe 20 and fitting 11, and the pipe connector 30 and fitting 11, are in contact with each other and are integrally connected during the curing process of the carbon fiber frame. The materials of the oil pipe 20 and pipe connector 30 may differ from the material of the carbon fiber frame, for example, by using metal. When using metal, the oil pipe 20 and pipe connector 30 will be encased and fixed in the carbon fiber connector by the carbon fiber frame under the pressure during the curing process.

[0080] In this embodiment, if it is used as a female connector, the structure of the pipe connector 30 can be referred to Figure 9 At this point, the pipe fitting 30 has a groove, the bottom of which communicates with the insert 31. This groove can serve as a structure for interlocking with other mating devices during insertion, thereby improving the stability of the mating process. Furthermore, threads can be provided on the inner wall of the groove, and corresponding external threads can be provided on the mating device serving as the male end, further improving the mating stability through threaded engagement.

[0081] When the pipe wall 12 of the fitting 11 is manufactured using carbon fiber material, the pipe connector 30 can be placed in the corresponding position during the forming process of the pipe wall 12, and the pipe connector 30 can be fixed in the countersunk hole 13 position of the pipe wall 12 during the forming process.

[0082] Furthermore, the pipe fitting 30 and the countersunk hole 13 are co-cured and formed. For example, this forming method can further improve the firmness of the connection between the pipe fitting 30 and the pipe wall 12, and reduce the risk of the pipe fitting 30 loosening.

[0083] The inner wall of the countersunk hole 13 and the outer wall of the pipe joint 30 are stepped in a corresponding manner. For example, refer to... Figure 9 , Figure 9 The countersunk hole 13 and pipe fitting 30 shown are in shapes without a stepped structure. However, stepped fitting structures can be added to the countersunk hole 13 and pipe fitting 30. For example, the inner wall of the countersunk hole 13 can be bent at a right angle at the midpoint of its axial direction, and a corresponding right angle bend can be formed at the midpoint of the axial direction of the pipe fitting 30. This stepped fit further increases the contact area between the two, allowing the pipe fitting 30 to be more securely installed on the pipe wall 12.

[0084] In addition, one or more sealing rings 32 can be installed between the pipe joint 30 and the countersunk hole 13 to further improve the sealing performance between the pipe joint 30 and the countersunk hole 13.

[0085] In the aforementioned pre-embedded oil circuit structure of the bicycle frame, by setting the oil supply pipe 20 and pipe connector 30 on the frame body 10, not only is the bicycle's brake wiring hidden inside the frame, but there is also no need to thread the wire inside the frame, greatly reducing the assembly difficulty. Compared to the simple connection between the oil supply pipe 20 and the pipe connector 30, this technical solution features a core 31 on the pipe connector 30. The core 31 is interference-fitted with the inner wall of the oil supply pipe 20, allowing the pipe connector 30 to not only connect with the oil supply pipe 20, but also forcing the oil supply pipe 20 or the core 31 to undergo elastic deformation. This fills the gap between the outer wall of the core 31 and the inner wall of the oil supply pipe 20, enabling an effective seal between the pipe connector 30 and the oil supply pipe 20 without the use of a sealing ring 32. However, since the pipe joint 30 and the oil pipe 20 are fixedly connected in the extending direction, and the pipe joint 30 is fixed to the pipe wall 12 of the fitting 11, the shaking of the oil pipe 20 within the fitting 11 can easily cause the connection between the pipe joint 30 and the pipe wall 12 to loosen. This, in turn, can affect the fit between the pipe joint 30 and the oil pipe 20, and after prolonged use, the pipe joint 30 may easily detach from the pipe wall 12. Therefore, in this technical solution, the oil pipe 20 is further fixed inside the pipe wall 12 of the pipe body. This arrangement not only hides the oil pipe 20 inside the pipe body, but also, because the position of the oil pipe 20 is fixed, it will not shake within the pipe body, thus not affecting the connection between the pipe joint 30 and the pipe wall 12. Furthermore, in this technical solution, the oil pipeline 20 is not only fixedly connected to the pipe wall 12 at the connection point with the pipe joint 30, but the entire oil pipeline 20 is fixedly connected to the pipe wall 12. This arrangement further ensures that the oil pipeline 20 will not affect the pipe joint 30. At the same time, since the entire oil pipeline 20 no longer shakes, there will be no material fatigue caused by shaking or bending, thus ensuring that the oil pipeline 20 has a long service life. During the normal service life, the oil pipeline 20 is not prone to damage, so there is no need to repair the fixedly connected oil pipeline 20, reducing maintenance costs.

[0086] As one aspect of the bicycle involved in this embodiment, in the frame body 10, at least some of the pipes 11 that are directly fixedly connected are integral structures. In at least two pipes 11 that are integral structures and have the oil supply pipe 20 fixedly installed, the oil supply pipe 20 is continuously and uninterruptedly arranged in the two pipes 11.

[0087] Specifically, refer to Figure 1 and Figure 6Taking the lower tube 111 and the head tube 110 as examples, these two tubes 11 are directly and fixedly connected without any other components. Therefore, these two tubes 11 can be an integral structure, that is, they are formed together during the molding and manufacturing of the lower tube 111 and the head tube 110, thus forming an integral structure. Both the lower tube 111 and the head tube 110 are provided with oil supply pipes 20, and the oil supply pipes 20 extend continuously in both tubes 11. A pipe connector 30 is provided at the end of the lower tube 111, and another pipe connector 30 is provided on the head tube 110. These two pipe connectors 30 connect to the two ends of the oil supply pipe 20, respectively. Of course, if the lower tube 111 and the rear lower fork tube 113 are also integrally formed, then the oil supply pipe 20 will continue to extend continuously to the end of the rear lower fork tube 113, and a pipe connector 30 will be provided at that position, allowing the brake caliper 61 to directly connect with the pipe connector 30 to form an oil circuit.

[0088] Furthermore, in other embodiments, in the frame body 10, at least some of the directly fixedly connected pipes 11 are split structures. Among at least two split pipes 11 that are fixedly provided with the oil pipe 20, the two pipes 11 are connected to form a connection between the oil pipe 20 by their respective pipe joints 30. Moreover, the two pipe joints 30 are connected in a male-female plug-in manner.

[0089] Specifically, refer to Figure 1 and Figure 6 Taking the lower tube 111 and the rear lower fork tube 113 as examples, these two tubes 11 are directly and fixedly connected without the aid of other components. These two tubes 11 can be separate structures, meaning they are formed separately during manufacturing and then assembled later. Both the lower tube 111 and the rear lower fork tube 113 are equipped with oil delivery pipes 20, and these two oil delivery pipes 20 are connected by pipe fittings 30. For example, a pipe fitting 30 is provided on the side of the lower tube 111, and a corresponding pipe fitting 30 is also provided on the rear lower fork tube 113. One of these pipe fittings 30 serves as a male and the other as a female, and they are inserted to form a mating relationship. Simultaneously, the rear lower fork tube 113 is secured to the lower tube 111 with bolts or other fasteners. At this time, the connection between the two pipe fittings 30 is fixed, and they are not easily separated.

[0090] Among them, reference Figure 4 and Figure 5The handlebar tube 114 and the fork tube 112 are directly and fixedly connected. Since these two tubes 11 are necessarily separate structures, and the fork tube 112 needs to house the front wheel brake caliper 61, the oil supply line 20 on the fork tube 112 also needs to be connected to the oil supply line 20 in the handlebar tube 114. Furthermore, the handlebar tube 114 is rotatably connected to the head tube 110, and the oil supply lines 20 in the head tube 110, down tube 111, and rear lower fork tube 113 are connected to the rear wheel brake caliper 61. Therefore, while the handlebar tube 114 and head tube 110 are rotatably connected, the oil supply lines 20 also need to be connected. For this purpose, two oil supply lines 20 are provided in the handlebar tube 114, located on the left and right sides respectively, and used to control the rear and front wheel brake calipers 61 respectively.

[0091] To address the issue of connecting the oil supply pipe 20 between the handlebar tube 114 and the head tube 110, as one aspect of the bicycle involved in this embodiment, the bicycle also adopts a handlebar connection structure provided by this utility model. This handlebar connection structure is based on the aforementioned pre-embedded oil circuit structure of the bicycle frame. The head tube 110 and handlebar tube 114 of the frame body 10 are both fixedly provided with the oil supply pipe 20 and pipe connector 30. In addition, it also includes a headset 40 and an oil supply jumper cable 50. The handlebar tube 114 is rotatably mounted on the head tube 110 through the headset 40. The oil supply jumper cable 50 includes an oil supply hose 51 and two oil supply connectors 52. The two oil supply connectors 52 are fixedly connected to both ends of the oil supply hose 51 and respectively connected to the pipe connectors 30 on the handlebar tube 114 and the head tube 110, which are connected to the oil supply pipe 20 inside both of them.

[0092] Specifically, the headset 40 adopts a conventional headset structure, which is used to rotatably mount the fork tube 112 and handlebar tube 114 to the head tube 110. Then refer to... Figure 5 , Figure 6 and Figure 9At the front end of the vertical rod connecting the handle tube 114 and the head tube 110, a downward-facing pipe connector 30 is provided. The oil supply pipe 20 connected to this pipe connector 30 is connected to the brake handle 62 corresponding to the rear wheel. Simultaneously, an upward-facing pipe connector 30 is provided on the front side of the head tube 110. Between these two pipe connectors 30, an oil supply jumper 50 is provided. Oil supply hoses 51 of the oil supply jumper 50 have oil supply connectors 52 fixed at both ends. These two oil supply connectors 52 are respectively connected to the two pipe connectors 30. These two oil supply connectors 52 can be provided with external threads, and the pipe connectors 30 can be provided with internal threads. The threaded engagement allows the oil supply jumper 50 and the pipe connectors 30 to be fixedly connected without the need for external fixing structures. Since the pipe connector 30 on the head tube 110 needs to be installed facing upwards, an open opening 1103 is provided on the front side of the head tube 110. The upper and lower edges of the open opening 1103 are folded inwards to form a stepped surface, and the pipe connector 30 on the head tube 110 is set on the stepped surface at the lower side. At the same time, a cover 1102 is provided. The cover 1102 is adapted to the shape and size of the open opening 1103 and can be embedded and fixed in the open opening 1103 to cover the open opening 1103 and cover the oil jumper 50 to prevent the oil jumper 50 from being exposed outside the frame.

[0093] Because the aforementioned oil circuit pre-embedded structure is used in the bicycle frame, and the handlebar tube 114 needs to rotate relative to the head tube 110 after being assembled onto the head tube 110 via the headset 40, the handlebar tube 114 and the head tube 110 cannot form a direct mating relationship through the aforementioned connector. Therefore, in this technical solution, an oil supply jumper 50 is provided. The oil supply jumper 50 includes an oil supply hose 51 and two oil supply connectors 52. The two oil supply connectors 52 can be respectively connected to the pipe connectors 30 on the handlebar tube 114 and the head tube 110. The two oil supply connectors 52 are then connected through the oil supply hose 51, thereby connecting the oil supply pipes 20 on the handlebar tube 114 and the head tube 110 into one unit. With this configuration, when the handle tube 114 rotates relative to the head tube 110, the pipe connector 30 on the handle tube 114 will change position relative to the connector on the head tube 110. However, the two are connected by the oil supply jumper 50, which provides leeway for the distance change caused by this position change, allowing the handle tube 114 to rotate freely without being restricted by the head tube 110. Furthermore, compared to directly connecting the pipe connector 30 on the handle tube 114 to the pipe connector 30 on the head tube 110 and forming a rotational fit between the two pipe connectors 30, the connection structure provided by this technical solution allows for a firm connection between the oil supply connector 52 and the pipe connector 30. The position change of the handle tube 114 relative to the head tube 110 is offset by the deformation of the oil supply pipe 20 piece 11, thereby improving the connection stability of the oil supply pipe 20 in the handle tube 114 and the head tube 110.

[0094] Reference Figure 7 and Figure 8 The upper cover 41 of the headset 40 has a first clearance hole 42 extending circumferentially and forming an arc along its axial direction; the head tube 110 has a second clearance hole 1101 forming an arc corresponding to the first clearance hole 42; the oil hose 51 of the oil jumper 50 passes through the first clearance hole 42 and the second clearance hole 1101. The first clearance hole 42 and the second clearance hole 1101 are provided at corresponding positions on the upper cover 41 and the head tube 110 of the headset 40, and the oil hose 51 of the oil jumper 50 passes through these two clearance holes. The clearance holes allow the oil hose 51 to move between the clearance holes when the handle tube 114 rotates relative to the head tube 110, avoiding interference between the headset 40 and the oil hose 51.

[0095] As one aspect of the bicycle involved in this embodiment, a brake lever 62 and a brake caliper 61 are also installed on the bicycle frame. For example, a pipe connector 30 for forming an oil circuit with the brake lever 62 is provided on the handlebar tube 114. The brake lever 62 is fixedly installed on the handlebar tube 114 by fasteners such as bolts, and can be connected to the pipe connector 30 by connecting a flexible hose. Alternatively, a docking device corresponding to the pipe connector 30 on the handlebar tube 114 can be directly provided on the brake lever 62. When the brake lever 62 is installed on the handlebar tube 114, the docking device is connected to the pipe connector 30 on the handlebar tube 114. Similarly, the brake caliper 61 can also be connected to the pipe connector 30 on the rear chainstay tube 113 by using a flexible hose or a docking device.

[0096] The bicycle according to this utility model embodiment includes a frame, wherein the frame adopts the above-mentioned oil circuit pre-embedded structure, the oil circuit wiring of the bicycle is hidden in the frame, the appearance is simpler, and there is no need to assemble brake wiring later, and the assembly difficulty is low.

[0097] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A pre-embedded oil circuit structure for a bicycle frame, characterized in that, The utility model relates to a kind of bicycle frame, including: Frame body (10), it is made of several pipe fittings (11), the pipe fitting (11) is enclosed by pipe wall (12); Oil pipe (20), at least one pipe fitting (11) of the frame body (10) is fixed with the oil pipe (20), the oil pipe (20) has the extension direction consistent with the pipe fitting (11), and the outer surface of the oil pipe (20) is connected with the pipe wall (12) of the pipe fitting (11); Pipe joint (30), every two pipe joints (30) are connected to the two ends of an oil pipe (20), the pipe joint (30) is embedded in the pipe wall (12) of the pipe fitting (11) and exposed outside the pipe fitting (11);The pipe joint (30) and the oil pipe (20) are sealed and fixed by the plug-in core (31) in the pipe joint (30) and into the oil pipe (20) and the inner wall of the oil pipe (20) interference fit.

2. A structure for pre-burial of an oil line of a bicycle frame according to claim 1, wherein In the pipe fitting (11) fixed with the oil pipe (20), hollow installation channel (121) is arranged in the pipe wall (12) along the extension direction of the oil pipe (20);The oil pipe (20) is located in the installation channel (121) and is connected with the inner wall of the installation channel (121).

3. A structure for pre-burial of an oil line of a bicycle frame according to claim 2, wherein The pipe fitting (11) fixed with the oil pipe (20) is made of carbon fiber material, and the oil pipe (20) and the installation channel (121) are co-cured.

4. The oil line pre-burial structure of a bicycle frame according to claim 2, wherein The pipe wall (12) of the pipe fitting (11) is recessed with counterbore (13);The pipe joint (30) is embedded in the counterbore (13) and is connected with the inner side wall of the counterbore (13).

5. A preformed oil line structure for a bicycle frame as defined in claim 4, wherein The pipe fitting (11) fixed with the oil pipe (20) is made of carbon fiber material, and the pipe joint (30) and the counterbore (13) are co-cured.

6. A structure for pre-burial of an oil line of a bicycle frame according to claim 4, wherein The inner side wall of the counterbore (13) and the outer side wall of the pipe joint (30) are stepped.

7. The oil line pre-burial structure of a bicycle frame according to claim 1, wherein In the frame body (10), the pipe fitting (11) fixed with the oil pipe (20) and the pipe joint (30) includes head tube (110), lower tube (111), front fork tube (112), rear lower fork tube (113) and / or handle tube (114).

8. A structure for pre-burial of an oil line of a bicycle frame according to claim 7, wherein In the frame body (10), at least part of the directly fixed and connected pipe fittings (11) are integrated structure, and in the at least two pipe fittings (11) of integrated structure and fixed with the oil pipe (20), the oil pipe (20) is continuously arranged in the two pipe fittings (11).

9. A structure for pre-burial of an oil line of a bicycle frame according to claim 7, wherein In the frame body (10), at least part of the directly fixed and connected pipe fittings (11) are split structure, and in the at least two pipe fittings (11) of split structure and fixed with the oil pipe (20), the two pipe fittings (11) are connected by respective pipe joints (30) to form the communication of the oil pipe (20).

10. A structure for pre-burial of an oil line of a bicycle frame according to claim 9, wherein The two pipe joints (30) are connected in male-female plug-in mode.

11. A handlebar connection structure of a bicycle frame based on the oil line embedded structure of the bicycle frame according to any one of claims 1 to 10, wherein the head tube (110) and the handlebar tube (114) of the frame body (10) are each fixed with the oil line (20) and the pipe joint (30), and characterized in that, It also includes head bowl group (40) and oil transfer jumper wire (50). The handle tube (114) is rotatably installed on the head tube (110) through the head bowl set (40); The oil delivery jumper (50) comprises an oil delivery hose (51) and two oil delivery connectors (52), the two oil delivery connectors (52) are fixedly connected to two ends of the oil delivery hose (51) and are respectively connected to the pipe connectors (30) on the handle tube (114) and the head tube (110) to communicate with the oil delivery pipe (20) in the handle tube (114) and the head tube (110).

12. A handlebar connection for a bicycle frame as claimed in claim 11, characterised in that The upper cover (41) of the head bowl set (40) is provided with a first clearance hole (42) extending along the circumference thereof and in an arc shape along the axial direction thereof; the head tube (110) is provided with a second clearance hole (1101) in an arc shape corresponding to the first clearance hole (42); the oil delivery hose (51) of the oil delivery jumper (50) penetrates through the first clearance hole (42) and the second clearance hole (1101).

13. A bicycle comprising a frame, characterized in that The frame adopts the oil line pre-embedded structure of the bicycle frame according to any one of claims 1-10.

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