A bicycle frame, an upper tube of a bicycle frame, and a bicycle

Abstract

The utility model provides a bicycle frame, the upper pipe of bicycle frame and bicycle, the bicycle frame includes head tube, middle pipe, first adapter and upper pipe, the middle pipe and head tube are spaced apart along the front -back direction, first adapter is installed in the side of head tube to middle pipe, the front connecting portion of upper pipe and first adapter are detachably connected, the rear connecting portion of upper pipe and middle pipe are detachably connected, wherein, the front connecting portion includes the first recess groove of setting on the side of upper pipe, and first adapter is accommodated in the first recess groove with clearance fit, and / or, the rear connecting portion includes the second recess groove of setting on the rear end surface of upper pipe, the second recess groove is through the upper side surface and the lower side surface of upper pipe, and the opening of second recess groove is towards middle pipe, and upper pipe can be set in the outside of middle pipe through the second recess groove. Therefore, can easily place upper pipe in the corresponding position of head tube and middle pipe, need not too much strength or complex step, greatly improved the convenience of installation, dismounting of upper pipe.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a bicycle frame, a bicycle frame top tube, and a bicycle. Background Technology

[0002] Bicycles, including human-powered and electric bicycles, have become an important mode of transportation for short-distance urban travel due to their convenience, environmental friendliness, and efficiency. A bicycle frame consists of a head tube, a bottom tube, and a top tube. The head tube and bottom tube are distributed front to back, while the top tube connects the head tube and bottom tube. The top tube's function is to make the frame more stable; however, its presence also results in a heavier frame, hinders frame folding, and increases the difficulty of riding, requiring riders to step over the top tube to ride. Therefore, to meet the diverse needs of users for bicycle frames, a detachable top tube design has emerged and is gradually becoming a hot topic in the market.

[0003] Currently, the upper tube is a separate component, which is connected and fixed to the head tube and middle tube through some connecting mechanisms.

[0004] However, in order to ensure the connection strength, the existing connection mechanisms impose many structural restrictions on the upper pipe, which leads to inconvenience in the installation and disassembly of the upper pipe. Utility Model Content

[0005] To address the aforementioned problems, embodiments of this application provide a bicycle frame, a top tube of the bicycle frame, and a bicycle, to at least partially solve the problems described above.

[0006] In a first aspect, this application provides a bicycle frame, comprising: Head tube; The middle tube and the head tube are spaced apart along the front-to-back direction; The first adapter is installed on the side of the head tube facing the middle tube; The upper tube includes a front connecting part and a rear connecting part. The front connecting part is detachably connected to the first adapter, and the rear connecting part is detachably connected to the middle tube. The front connecting part includes a first groove on the side of the upper tube, and the first adapter is accommodated in the first groove with clearance fit. The rear connecting part includes a second groove on the rear end face of the upper tube. The second groove penetrates the upper and lower surfaces of the upper tube, and the opening of the second groove faces the middle tube. The upper tube can be sleeved on the outside of the middle tube through the second groove.

[0007] In one example, the first groove is located on the lower surface of the upper tube and extends through the front end surface of the upper tube.

[0008] In one example, the front connecting part further includes a first through hole disposed on the side of the upper tube, the first through hole penetrating the bottom wall or side wall of the first groove; the bicycle frame further includes a first connector, the first connector passing through the first through hole and connecting to the first adapter.

[0009] In one example, a slot is provided on the front end face of the upper tube, and when the first adapter is accommodated in the first groove of the upper tube, a portion of the head tube is adapted to be accommodated in the slot.

[0010] In one example, the upper tube includes a main body, a first support arm, and a second support arm. The first and second support arms are both connected to the rear end face of the main body and are spaced apart in the left-right direction. The first support arm, the second support arm, and the main body enclose and form a second groove. The first and second support arms are each provided with a second through hole. The bicycle frame includes at least two second connectors. At least one second connector passes through the second through hole on the first support arm and is detachably connected to the middle tube. At least another second connector passes through the second through hole on the second support arm and is detachably connected to the middle tube.

[0011] In one example, the upper tube is integrally formed, or the main body, the first support arm, and the second support arm are integrally formed.

[0012] In one example, the main body includes a first segment, a second segment, and a third segment distributed in a front-to-back direction and connected sequentially, wherein the first segment, the second segment, and the third segment are welded together sequentially; or, the first segment and the second segment are integrally formed, and the rear end of the second segment and the front end of the third segment are welded together; or, the second segment and the third segment are integrally formed, and the rear end of the first segment and the front end of the second segment are welded together.

[0013] In one example, the front connecting portion is disposed at the front end of the first segment, and the first support arm and the second support arm are both connected to the rear end of the third segment; wherein, the first support arm and the second support arm are both welded to the third segment, or, the first support arm, the second support arm and the third segment are integrally formed.

[0014] In one example, the bicycle frame further includes a plurality of second adapters, each having an internally threaded hole. Receiving holes are provided on opposite sides of the center tube. At least a portion of the second adapter is received in the receiving holes, and the second adapter is connected to the center tube. The second connector has an external thread, and after passing through the second through hole, it is threadedly connected to the internally threaded hole of the second adapter.

[0015] In one example, the second adapter includes a connecting bridge and two bead-shaped parts, which are respectively connected to opposite ends of the connecting bridge. Each bead-shaped part has an internally threaded hole. The number of receiving holes is the same as the number of bead-shaped parts, and each bead-shaped part is received in a corresponding receiving hole.

[0016] In one example, the first adapter includes an arm plate, a base, a limiting protrusion, and a third through hole, wherein the limiting protrusion is located on the front surface of the base, and the third through hole penetrates the base and the limiting protrusion in a front-rear direction; The head tube is provided with a limiting groove and a threaded connection hole located in the limiting groove; The bicycle frame also includes a third connector, which passes through the third through hole and is threaded to the threaded connection hole, and the limiting protrusion is inserted into the limiting groove in a matching shape. The number of arm plates is two, and the two arm plates are connected to the rear surface of the base and located on opposite sides of the third through hole. The arm plates are connected to the front connecting part of the upper tube.

[0017] Secondly, this application provides a top tube for a bicycle frame, the top tube including a front connecting part and a rear connecting part, the front connecting part being detachably connected to the head tube of the frame, and the rear connecting part being detachably connected to the center tube of the frame, wherein the front connecting part includes a first groove and a first through hole disposed on the side of the top tube, the first through hole penetrating the bottom wall or side wall of the first groove, and / or, the rear connecting part includes a second groove disposed on the rear end face of the top tube, the second groove penetrating the upper side surface and the lower side surface of the top tube, and the opening of the second groove is arranged in a front-to-back direction, the top tube being sleeved on the outside of the center tube through the second groove.

[0018] In one example, the first groove is located on the lower surface of the upper tube and extends through the front end surface of the upper tube.

[0019] In one example, the upper tube includes a main body, a first arm and a second arm, both of which are connected to the rear end face of the main body and are spaced apart in the left-right direction. The first arm, the second arm and the main body together form the second groove. Both the first and second arms are provided with a second through hole, which is used to connect the center tube of the frame.

[0020] Thirdly, this application provides a bicycle, including wheels and a frame, wherein the frame is the frame described above, or the frame includes the top tube of the bicycle frame described above, and the wheels are rotatably mounted on the frame.

[0021] Based on the bicycle frame provided in this application, and through the aforementioned technical solution, during frame assembly, the top tube can be fitted over the first adapter via the first groove, and then the corresponding connectors can connect the top tube and the first adapter, thereby achieving a detachable connection between the top tube and the head tube. On one hand, since the first groove is located on the side of the top tube, when installing the top tube, it is easy and convenient to first place the top tube in the correct position; that is, while placing the rear connector of the top tube at the corresponding connection position with the center tube, it is easy to fit the front connector of the top tube over the first adapter, and then the corresponding connectors can connect the top tube and the head tube. The upper tube and the head tube are connected by a connector. Furthermore, since the second groove is located on the rear end face of the upper tube, the upper tube can be easily and conveniently placed in the correct position. That is, while placing the front connecting part of the upper tube in the corresponding connection position with the first adapter, the rear connecting part of the upper tube can be easily fitted over the middle tube along its extension direction. Then, the corresponding connectors connect the upper tube and the middle tube. Therefore, during the disassembly and installation of the upper tube, tools are not required to place it in the correct position for connection with the head tube and the middle tube, or to remove it from the correct position. Therefore, according to the frame provided in this application, since the upper tube has the first groove and / or the second groove, the user can easily place the upper tube in the corresponding position on the head tube and the middle tube, or remove it from the head tube and the middle tube, without excessive force or complicated steps. This not only achieves a detachable connection between the upper tube and the head tube and the middle tube, but also greatly improves the convenience of installation and disassembly. This design meets users' diverse needs for the frame and also makes it possible to fold and carry the frame. Attached Figure Description

[0022] The accompanying drawings are intended only to illustrate and explain this application and do not limit the scope of this application. Figure 1 This is a perspective view of a bicycle frame provided in an exemplary embodiment of this application.

[0023] Figure 2 This is a partial exploded view of a bicycle frame provided in an exemplary embodiment of this application.

[0024] Figure 3 This is another partial exploded view of a bicycle frame provided in an exemplary embodiment of this application.

[0025] Figure 4 This is another partially exploded view of a bicycle frame provided in an exemplary embodiment of this application.

[0026] Figure 5 This is a schematic diagram of an upper pipe provided by an exemplary embodiment of this application.

[0027] Figure 6 yes Figure 5 A three-dimensional view of the upper tube is provided.

[0028] Figure 7 yes Figure 5 A side view of the upper tube is provided.

[0029] Figure 8 This is a side view of a second adapter in a bicycle frame provided in an exemplary embodiment of this application.

[0030] Figure label: 10-Head tube, 11-Limiting groove, 12-Threaded connection hole; 20-middle tube; 30-First adapter, 31-Arm plate, 32-Base, 33-Limiting protrusion, 34-Third through hole; 40-Upper tube, 41-First groove, 42-Second groove, 43-First through hole, 44-Card slot, 45-Main body, 46-First support arm, 47-Second support arm, 48-Second through hole, 491-Weight reduction groove, 492-Reinforcing rib; 50 - Second adapter, 51 - Connecting bridge, 52 - Bean body; 61-First connector, 62-Second connector, 63-Third connector; 70 - lower tube, X - front-back direction, Y - up-down direction, Z - left-right direction. Detailed Implementation

[0031] To provide a clearer understanding of the technical features, objectives, and effects of the embodiments of this application, the specific implementation methods of the embodiments of this application will now be described with reference to the accompanying drawings.

[0032] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0033] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown as one or more, or only one or more are labeled.

[0034] A bicycle is a means of transportation for people to ride. It can be divided into human-powered bicycles and electric bicycles. Both human-powered and electric bicycles can be equipped with a top tube. The top tube can be understood as the crossbar of the bicycle. The main function of the crossbar is to connect the head tube and the bottom tube, making the frame structure more stable. However, the presence of the crossbar also makes the frame heavier, makes it difficult to fold the frame, and increases the difficulty of riding.

[0035] Therefore, this application provides a top tube for a bicycle frame, which has a structure that facilitates disassembly and installation.

[0036] It should be clarified that, for ease of description, this application defines a frame orientation system based on the bicycle being in a standing position. "Up" and "down" are defined according to the direction of gravity, "front" and "rear" are defined according to the handlebars and rear seat of the bicycle, with the handlebars in front and the rear seat in the back, and "left" and "right" are based on the rider's left hand side being left and right hand side being right when riding the bicycle. Then, the orientation of each part of the top tube 40 is described according to the defined frame orientation system.

[0037] For details, please refer to Figures 5 to 7 The upper tube provided in this application includes a front connecting part and a rear connecting part. The front connecting part is used for detachable connection with the head tube of the frame, and the rear connecting part is used for detachable connection with the middle tube of the frame. The front connecting part includes a first groove 41 and a first through hole 43 provided on the side of the upper tube 40. The first through hole 43 penetrates the bottom wall or side wall of the first groove 41. The rear connecting part includes a second groove 42 provided on the rear end face of the upper tube 40. The second groove 42 penetrates the upper surface and the lower surface of the upper tube 40, and the opening of the second groove 42 is arranged in a front-to-rear direction. The upper tube 40 can be sleeved on the middle tube 20 through the second groove 42. The upper tube 40 has opposing upper and lower surfaces in the vertical direction Y.

[0038] With the above technical solution, when the head tube 10 of the frame is detachably connected to the front connecting part, the upper tube 40 can be sleeved on the head tube 10 or the corresponding adapter structure on the head tube 10 through the first groove 41, and then the corresponding connector can be connected to the head tube 10 located in the first groove 41 after passing through the first through hole 43; when the middle tube 20 of the frame is detachably connected to the rear connecting part, the upper tube 40 can be sleeved on the middle tube 20 through the second groove 42, and then the corresponding connector can be connected to the upper tube 40 and the middle tube 20.

[0039] On the one hand, since the first groove 41 is located on the side of the upper tube 40, when installing the upper tube 40, it is easy and convenient to first place the upper tube 40 in the correct position. That is, while placing the rear connecting part of the upper tube 40 at the corresponding connection position with the middle tube 20, it is easy to slip the front connecting part of the upper tube 40 onto the head tube 10 or the corresponding adapter structure on the head tube 10. At this time, the upper tube 40 is only in the correct position to connect with the head tube 10 and the middle tube 20, but the actual connection relationship has not yet been established. Then, the upper tube 40 can be connected to the head tube 10 and the middle tube 20 respectively through the corresponding connectors. Similarly, when disassembling the upper tube 40, the corresponding connectors are first removed to release the actual connection relationship. Then, the front connecting part of the upper tube 40 can be easily separated from the head tube 10, thereby easily separating the rear connecting part of the upper tube 40 from the middle tube 20. Obviously, since the first groove 41 is located on the side of the upper tube 40, the upper tube 40 can be placed in the correct position to connect with the head tube 10 and the middle tube 20 without the need for tools during disassembly and installation, or the upper tube 40 can be removed from the correct position. On the other hand, since the second groove 42 is located on the rear end face of the upper tube 40, the upper tube 40 can be easily and conveniently placed in the correct position first. That is, while placing the front connecting part of the upper tube 40 in the position corresponding to the head tube 10, the rear connecting part of the upper tube 40 can be easily fitted over the middle tube 20 along the extension direction of the middle tube 20. At this time, the upper tube 40 is only in the correct position to connect with the head tube 10 and the middle tube 20, but an actual connection relationship has not yet been established. Then, the upper tube 40 can be connected to the head tube 10 and the middle tube 20 respectively through the corresponding connectors. Similarly, when disassembling the top tube 40, first remove the corresponding connectors to disengage the actual connection. Then, the rear connector of the top tube 40 and the middle tube 20 can be easily separated, thereby easily separating the front connector of the top tube 40 and the head tube 10. Clearly, since the second groove 42 is located on the rear end face of the top tube 40, tools are not required during the disassembly and installation of the top tube 40 to place it in the correct position for connection with the head tube 10 and the middle tube 20, or to remove it from its correct position. It should be clarified that the correct position of the top tube 40 refers to its position on the frame relative to the head tube 10 and the middle tube 20 when the actual connection between the top tube 40 and the head tube 10 and the middle tube 20 is established. Thirdly, it is obvious that when the side of the upper tube 40 has a first groove 41 and the rear end face has a second groove 42, the upper tube 40 can be placed in the correct position more easily or removed from the correct position more easily during the disassembly and installation of the upper tube 40.Therefore, due to the presence of the first groove 41 and / or the second groove 42, the top tube 40 provided in this application allows users to easily place or remove the top tube 40 from the head tube 10 and the middle tube 20 during installation or removal without excessive force or complicated steps. This not only achieves a detachable connection between the top tube 40 and the head tube 10 and the middle tube 20, but also greatly improves the convenience of installation and removal. This design meets the diverse needs of users for the frame and also makes folding and portability of the frame possible.

[0040] In one possible embodiment, the first groove 41 may be located on the lower surface of the top tube 40 and extend through the front end surface of the top tube 40. Thus, the first groove 41 is an opening facing both the front and bottom of the top tube 40, allowing the front end of the top tube 40 to be easily fitted onto the corresponding adapter structure on the head tube 10 during installation. Furthermore, if the frame is positioned in a riding posture when the top tube 40 is installed, the front end of the top tube 40 can overlap the adapter structure on the head tube 10, meaning the corresponding adapter structure on the head tube 10 can also support the top tube 40, further facilitating its installation.

[0041] In other embodiments, the first groove 41 may also be located on the left or right surface of the upper end. Thus, the first groove 41 is a groove that opens to the left or right side of the upper tube 40, so that when installing the upper tube 40, the front end of the upper end can be conveniently fitted onto the head tube 10 or the corresponding adapter structure on the head tube 10.

[0042] In one possible embodiment, the upper tube 40 includes a main body 45, a first support arm 46, and a second support arm 47. Both the first support arm 46 and the second support arm 47 are connected to the rear end face of the main body 45 and are spaced apart in a left-right direction (Z). The first support arm 46, the second support arm 47, and the main body 45 together form a second groove 42. Each of the first support arm 46 and the second support arm 47 is provided with a second through hole 48 for connecting to the center tube 20 of the frame. Thus, the first support arm 46 and the second support arm 47 can encircle the left and right sides of the center tube 20, and corresponding connectors can pass through the second through holes 48 and connect to the center tube 20, thereby connecting the first support arm 46 and the second support arm 47 to the center tube 20 respectively, achieving a reliable connection between the upper tube 40 and the center tube 20.

[0043] In one possible implementation, the main body 45, the first arm 46, and the second arm 47 can be integrally formed. Alternatively, the upper tube 40 can be integrally formed. The integral forming process can be die casting or liquid forging, etc.

[0044] In another possible implementation, the main body 45 may include a first segment 451, a second segment 452, and a third segment 453 distributed and connected sequentially along the front-rear direction X, wherein the first segment 451, the second segment 452, and the third segment 453 are welded together sequentially; or, the first segment 451 and the second segment 452 are integrally formed, and the rear end of the second segment 452 and the front end of the third segment 453 are welded together; or, the second segment 452 and the third segment 453 are integrally formed, and the rear end of the first segment 451 and the front end of the second segment 452 are welded together.

[0045] Furthermore, the front connecting part can be located at the front end of the first segment 451, and the first arm 46 and the second arm 47 are both connected to the rear end of the third segment 453. The first arm 46 and the second arm 47 are both connected to the third segment 453 by welding, or the first arm 46, the second arm 47 and the third segment 453 are integrally formed.

[0046] In addition, the first groove 41 and the first through hole 43 of the front connecting part can be grooves and through holes directly formed on the main body 45, respectively.

[0047] Since both the first arm 46 and the second arm 47 are connected to the rear end face of the main body 45, the width of the main body 45 can gradually increase from the front end to the rear end, so that the rear end of the main body 45 has a sufficiently wide dimension to connect with the first arm 46 and the second arm 47. In one example, refer to... Figure 5 In order to reduce the weight of the upper tube 40, a weight-reducing groove 491 can be provided at the rear end of the lower surface of the main body 45, and a reinforcing rib 492 can be provided in the weight-reducing groove 491.

[0048] In another possible implementation, the main body 45 may include a first part and a second part. The front end of the first part is provided with an integrally formed front connecting part, and the rear end of the second part is connected with a first arm 46 and a second arm 47. The rear end of the first part and the front end of the second part are welded together.

[0049] In summary, by using the top tube 40 provided in this application, the top tube 40 of the frame can be flexibly installed and removed, meeting the diverse needs of users for the frame. For example, frame manufacturers can design a frame that is compatible with the top tube 40. This frame can be equipped with the top tube 40 or not when it leaves the factory. This reduces the types of top tube 10 and center tube 20 on the frame, and allows for the simultaneous production of frames with and without the top tube 40, which helps to reduce production costs.

[0050] Secondly, this application also provides a bicycle frame, which may include a detachable top tube 40. Based on the detachable nature of the top tube 40, when a user purchases the frame or a bicycle made from it, the user can decide whether or not to use the top tube 40, and the user can also decide whether or not to use the top tube 40 during daily use. For example, for some bicycles, the user can easily remove the top tube 40, that is, they can remove the top tube 40 to avoid the problem of needing to straddle the top tube 40 to ride, reducing the difficulty of riding and making it more convenient for women to ride. Alternatively, the user can install the top tube 40 to enhance stability, meeting the high strength requirements of men. As another example, for foldable bicycles, when the user wants to fold the frame, they can easily disconnect the connection between the top tube 40 and the head tube 10 and the bottom tube 20. When the user needs to unfold the frame and enhance stability, they can easily connect the top tube 40 back to the head tube 10 and the bottom tube 20.

[0051] For details, please refer to Figure 1 , Figure 2 and Figure 5 The bicycle frame includes a head tube 10, a bottom tube 20, a first adapter 30, and a top tube 40; the bottom tube 20 and the head tube 10 are spaced apart in the front-rear direction X; the first adapter 30 is installed on the side of the head tube 10 facing the bottom tube 20; the top tube 40 includes a front connecting part and a rear connecting part, the front connecting part and the first adapter 30 are detachably connected, and the rear connecting part and the bottom tube 20 are detachably connected, wherein the front connecting part includes a first groove 41 provided on the side of the top tube 40, the first adapter 30 is accommodated in the first groove 41 with clearance fit, and / or, the rear connecting part includes a second groove 42 provided on the rear end face of the top tube 40, the second groove 42 penetrates the upper and lower surfaces of the top tube 40, and the opening of the second groove 42 faces the bottom tube 20, and the top tube 40 can be sleeved on the bottom tube 20 through the second groove 42.

[0052] With the above technical solution, when assembling the frame, the upper tube 40 can be sleeved on the outside of the first adapter 30 through the first groove 41, and then the corresponding connectors can connect the upper tube 40 and the first adapter 30, thereby achieving a detachable connection between the upper tube 40 and the head tube 10; the upper tube 40 can be sleeved on the outside of the middle tube 20 through the second groove 42, and then the corresponding connectors can connect the upper tube 40 and the middle tube 20, thereby achieving a detachable connection between the upper tube 40 and the middle tube 20.

[0053] On the one hand, since the first groove 41 is located on the side of the upper tube 40, when installing the upper tube 40, it is easy and convenient to first place the upper tube 40 in the correct position. That is, while placing the rear connecting part of the upper tube 40 at the corresponding connection position with the middle tube 20, it is easy to slip the front connecting part of the upper tube 40 over the first adapter 30. At this time, the upper tube 40 is only in the correct position to connect with the head tube 10 and the middle tube 20, but the actual connection relationship has not yet been established. Then, the upper tube 40 can be connected to the first adapter 30 and the middle tube 20 respectively through the corresponding connectors. Similarly, when disassembling the upper tube 40, the corresponding connectors are first removed to disconnect the actual connection relationship. Then, the front connecting part of the upper tube 40 and the first adapter 30 can be easily separated, thereby easily separating the rear connecting part of the upper tube 40 from the middle tube 20. Obviously, since the first groove 41 is located on the side of the upper tube 40, the upper tube 40 can be placed in the correct position for connection with the head tube 10 and the middle tube 20 without the need for tools during disassembly and installation, or the upper tube 40 can be removed from the correct position. On the other hand, since the second groove 42 is located on the rear end face of the upper tube 40, the upper tube 40 can be easily and conveniently placed in the correct position first. That is, while placing the front connecting part of the upper tube 40 in the corresponding connection position with the first adapter 30, the rear connecting part of the upper tube 40 can be easily fitted over the middle tube 20 along the extension direction of the middle tube 20. At this time, the upper tube 40 is only in the correct position for connection with the head tube 10 and the middle tube 20, but an actual connection relationship has not yet been established. Then, the upper tube 40 can be connected to the first adapter 30 and the middle tube 20 respectively through the corresponding connectors. Similarly, when disassembling the top tube 40, first remove the corresponding connector to disengage the actual connection. Then, the rear connector of the top tube 40 and the middle tube 20 can be easily separated, thereby easily separating the front connector of the top tube 40 and the first adapter 30. Clearly, since the second groove 42 is located on the rear end face of the top tube 40, tools are not required during the disassembly and installation of the top tube 40 to place it in the correct position for connection with the head tube 10 and the middle tube 20, or to remove it from its correct position. It should be clarified that the correct position of the top tube 40 refers to its position on the frame relative to the head tube 10 and the middle tube 20 when the actual connection between the top tube 40 and the head tube 10 and the middle tube 20 is established. Thirdly, it is obvious that when the side of the upper tube 40 has a first groove 41 and the rear end face has a second groove 42, the upper tube 40 can be placed in the correct position more easily or removed from the correct position more easily during the disassembly and installation of the upper tube 40.Therefore, the frame provided in this application, because the top tube 40 has a first groove 41 and / or a second groove 42, allows users to easily place the top tube 40 in the corresponding positions on the head tube 10 and the center tube 20, or remove it from the head tube 10 and the center tube 20, without requiring excessive force or complicated steps. This not only achieves a detachable connection between the top tube 40 and the head tube 10 and the center tube 20, but also greatly improves the convenience of installation and disassembly. This design meets the diverse needs of users for the frame and also makes folding and portability of the frame possible.

[0054] In one possible embodiment, reference Figure 5 The first groove 41 can be located on the lower surface of the top tube 40 and penetrate the front end surface of the top tube 40. Thus, the first groove 41 is an opening facing both the front and bottom of the top tube 40, allowing the front end of the top tube 40 to be easily fitted onto the corresponding adapter structure on the head tube 10 during installation. Furthermore, if the top tube 40 is installed with the frame positioned in a riding posture, the front end of the top tube 40 can overlap the adapter structure (e.g., the first adapter 30) on the head tube 10, meaning the corresponding adapter structure on the head tube 10 can also support the top tube 40, further facilitating its installation. For example, a portion of the first adapter 30 can be accommodated in the first groove 41, providing both support and restraint for the front end of the top tube 40.

[0055] In other embodiments, the first groove 41 may also be located on the left or right surface of the upper tube 40. Thus, the first groove 41 is a groove that opens to the left or right side of the upper tube 40, so that when installing the upper tube 40, the front end of the upper tube 40 can be conveniently fitted onto the head tube 10 or the corresponding adapter structure (e.g., the first adapter 30) on the head tube 10.

[0056] Furthermore, in one example, refer to Figure 6 The front connecting part also includes a first through hole 43 provided on the side of the upper tube 40, the first through hole 43 penetrating the bottom wall or side wall of the first groove 41; the bicycle frame also includes a first connector 61, the first connector 61 passing through the first through hole 43 and connecting to the first adapter 30. By providing the first through hole 43, it is convenient to connect the upper tube 40 and the first adapter 30 using the first connector 61. Regarding the first through hole 43 penetrating the bottom wall or side wall of the first groove 41, it can be understood that the axis of the first through hole 43 passes through the bottom wall or side wall of the first groove 41.

[0057] The first adapter 30 may have a threaded hole, and the first connector 61 may have an external thread. The first connector 61 and the first adapter 30 are threaded together. The first connector 61 may be a standard part such as a bolt or screw.

[0058] In one specific embodiment, a groove 44 is provided on the front end face of the upper tube 40. When the first adapter 30 is received in the first groove 41 of the upper tube 40, a portion of the head tube 10 is adapted to be received in the groove 44. That is, when the first groove 41 of the upper tube 40 overlaps the first adapter 30, thereby allowing the first adapter 30 to be received in the first groove 41 of the upper tube 40, a portion of the front end face of the upper tube 40 and the head tube 10 are adapted to be received in the groove 44. In one example, the front end face of the upper tube 40 is constructed as an arc-shaped concave surface, thereby forming the groove 44.

[0059] In one possible embodiment, reference Figures 4 to 7 The upper tube 40 includes a main body 45, a first support arm 46, and a second support arm 47. Both the first support arm 46 and the second support arm 47 are connected to the rear end face of the main body 45 and are spaced apart in a left-right Z-direction. The first support arm 46, the second support arm 47, and the main body 45 enclose a second groove 42. Both the first support arm 46 and the second support arm 47 are provided with second through holes 48. The bicycle frame includes at least two second connecting members 62. At least one second connecting member 62 passes through the second through hole 48 on the first support arm 46 and is detachably connected to the middle tube 20. At least another second connecting member 62 passes through the second through hole 48 on the second support arm 47 and is detachably connected to the middle tube 20. Thus, the first support arm 46 and the second support arm 47 can encircle the left and right sides of the middle tube 20, and the second connecting members 62 can pass through the second through holes 48 and connect to the middle tube 20, thereby connecting the first support arm 46 and the second support arm 47 to the middle tube 20 respectively, achieving a reliable connection between the upper tube 40 and the middle tube 20.

[0060] The first arm 46 and the second arm 47 can be symmetrically distributed about the main body 45. Both the first arm 46 and the second arm 47 are provided with two second through holes 48. Two second connectors 62 pass through the two second through holes 48 on the first arm 46, and two other second connectors 62 pass through the two second through holes 48 on the second arm 47.

[0061] In one example, the middle tube 20 may have a threaded hole, and the second connector 62 may have external threads, with the second connector 62 and the middle tube 20 being threadedly connected. The second connector 62 may be a standard part such as a bolt or screw.

[0062] In one possible implementation, the main body 45, the first arm 46, and the second arm 47 can be integrally formed. Alternatively, the upper tube 40 can be integrally formed. The integral forming process can be die casting or liquid forging, etc.

[0063] In another possible implementation, the main body 45 may include a first segment 451, a second segment 452, and a third segment 453 distributed and connected sequentially along the front-rear direction X, wherein the first segment 451, the second segment 452, and the third segment 453 may be welded together sequentially, or the first segment 451 and the second segment 452 are integrally formed, and the rear end of the second segment 452 and the front end of the third segment 453 are welded together; or the second segment 452 and the third segment 453 are integrally formed, and the rear end of the first segment 451 and the front end of the second segment 452 are welded together.

[0064] Furthermore, the front connecting part can be located at the front end of the first segment 451, and the first arm 46 and the second arm 47 are both connected to the rear end of the third segment 453. The first arm 46 and the second arm 47 are both connected to the third segment 453 by welding, or the first arm 46, the second arm 47 and the third segment 453 are integrally formed.

[0065] In addition, the first groove 41 and the first through hole 43 of the front connecting part can be grooves and through holes directly formed on the main body 45, respectively.

[0066] In another possible implementation, the main body 45 may include a first part and a second part. The front end of the first part is provided with an integrally formed front connecting part, and the rear end of the second part is connected with a first arm 46 and a second arm 47. The rear end of the first part and the front end of the second part are welded together.

[0067] In another example, the bicycle frame also includes multiple second adapters 50, each with an internally threaded hole. Receiving holes are provided on opposite sides of the center tube 20, and at least a portion of the second adapter 50 is accommodated in these holes, with the second adapter 50 connected to the center tube 20. A second connector 62 has an external thread, passing through a second through hole 48 and threadedly connected to the internally threaded hole of the second adapter 50. Thus, by connecting the second adapter 50 between the center tube 20 and the second connector 62, this solution avoids directly creating threaded holes on the center tube 20. Compared to directly creating threaded holes on the center tube 20, this solution reduces the wall thickness requirement for the center tube 20; as long as the center tube 20 meets the frame strength requirements, there is no need to specifically increase the wall thickness of the center tube 20 for the purpose of creating threaded holes. Therefore, in actual manufacturing, tubular profiles can be directly used to manufacture the center tube 20, thereby reducing the frame manufacturing cost. Furthermore, since at least a portion of the second adapter 50 is accommodated in the receiving hole on the middle tube 20, the middle tube 20 can support the second adapter 50, ensuring a secure connection between the second adapter 50 and the middle tube 20. This allows the first arm 46 and the second arm 47 to be reliably connected to the middle tube 20, respectively. The receiving hole in the middle tube 20 can partially accommodate the second adapter 50, thereby controlling the distance between the second adapters 50 on both sides of the middle tube 20 to a smaller range. This prevents the distance between the first arm 46 and the second arm 47 from being too large, thus helping to control the size of the upper tube 40.

[0068] In one example, the connection between the second adapter 50 and the center tube 20 can also be achieved by welding, riveting, etc., further improving the connection strength and stability of the frame. For example, the portion of the second adapter 50 located in the receiving hole is welded to the center tube 20.

[0069] In one example, reference Figure 8 The second adapter 50 includes a connecting bridge 51 and two bead-shaped parts 52. The two bead-shaped parts 52 are respectively connected to opposite ends of the connecting bridge 51, and each bead-shaped part 52 has an internally threaded hole. The number of receiving holes is the same as the number of bead-shaped parts 52, and each bead-shaped part 52 is received in a corresponding manner within the receiving holes. By connecting the two bead-shaped parts 52 to opposite ends of the connecting bridge 51, the second adapter 50 has two internally threaded holes, and the risk of the bead-shaped parts 52 being easily lost due to their scattered distribution is reduced. The bead-shaped parts 52 can be standard connecting parts with internally threaded holes, such as nuts. The bead-shaped parts 52 can be welded to the central tube 20.

[0070] Regarding the specific structure of the first adapter 30, in one example, refer to... Figure 2 and Figure 3The first adapter 30 includes an arm plate 31, a base 32, a limiting protrusion 33, and a third through hole 34. The limiting protrusion 33 is located on the front surface of the base 32, and the third through hole 34 penetrates the base 32 and the limiting protrusion 33 in the front-rear direction X. The head tube 10 is provided with a limiting groove 11 and a threaded connection hole 12 located in the limiting groove 11. The bicycle frame also includes a third connector 63, which passes through the third through hole 34 and is threaded to the threaded connection hole 12. The limiting protrusion 33 is inserted into the limiting groove 11 in a matching shape. There are two arm plates 31, which are connected to the rear surface of the base 32 and located on opposite sides of the third through hole 34. The arm plates 31 are connected to the front connecting part of the upper tube 40. Thus, the third connector 63 serves to connect the first adapter 30 and the head tube 10 together. The limiting groove 11 limits the limiting protrusion 33, facilitating the positioning of the first adapter 30 on the head tube 10 and allowing the head tube 10 to provide some load-bearing support for the first adapter 30, thus promoting a reliable and stable connection between the two components. Furthermore, by providing two arm plates 31 connected to the upper tube 40 on the rear side of the base 32, the connection between the upper tube 40 and the first adapter 30 is made more robust. Since the two arm plates 31 are spaced apart on both sides of the third through hole 34, the force on the first adapter 30 is also more evenly distributed.

[0071] In one example, the first groove 41 is located on the lower surface of the upper tube 40 and extends through the front end surface of the upper tube 40, and the first through hole 43 extends through the side wall of the first groove 41. When the front end of the upper tube 40 is attached to the first adapter 30, at least two arm plates 31 of the first adapter 30 are located in the first groove 41, and the two arm plates 31 correspond to the two side walls of the first groove 41 respectively. The first connector 61 passes through the first through hole 43 of the upper tube 40 and connects to the arm plate 31 of the first adapter 30.

[0072] The number of threaded connection holes 12 can be three, and the three threaded connection holes 12 can be distributed in a triangle. Based on the principle of triangular stability, this facilitates a stable connection between the first adapter 30 and the head tube 10.

[0073] Additionally, refer to Figure 1 The bicycle frame may also include a downtube 70, which can be connected between the head tube 10 and the bottom tube 20, but located below the top tube 40. The downtube 70, head tube 10, and bottom tube 20 can be welded together. After the downtube 70 is welded together with the head tube 10 and bottom tube 20, the top tube 40 is then detachably connected to the head tube 10 and bottom tube 20 respectively.

[0074] Since both the first arm 46 and the second arm 47 are connected to the rear end face of the main body 45, the width of the main body 45 can gradually increase from the front end to the rear end, so that the rear end of the main body 45 has a sufficiently wide dimension to connect with the first arm 46 and the second arm 47. In one example, refer to... Figure 5 In order to reduce the weight of the upper tube 40, a weight-reducing groove 491 can be provided at the rear end of the lower surface of the main body 45, and a reinforcing rib 492 can be provided in the weight-reducing groove 491.

[0075] In addition, this application also provides a bicycle, including wheels and a frame, wherein the frame is the frame provided in this application, or the frame includes the top tube 40 provided in this application, and the wheels are rotatably mounted on the frame.

[0076] In one example, the bicycle also includes a battery and an electric motor. The battery can be repeatedly charged and discharged, the electric motor is electrically connected to the battery to obtain electrical energy, and the electric motor is connected to the wheel drive to drive the wheels. Thus, this bicycle is an electric bicycle, which can meet the riding needs of users in different scenarios. For example, for users who prioritize a lightweight and portable frame, such as female users, the weight of the frame can be reduced by removing the top tube 40.

[0077] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0078] It should be noted that although specific embodiments of this application have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this application. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this application.

[0079] The examples of the embodiments in this application are intended to concisely illustrate the technical features of the embodiments in this application, so that those skilled in the art can intuitively understand the technical features of the embodiments in this application, and are not intended to be improper limitations on the embodiments in this application.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A bicycle frame, characterized in that, include: Head tube (10); The middle tube (20) and the head tube (10) are distributed at intervals along the front-rear direction (X); The first adapter (30) is installed on the side of the head tube (10) facing the middle tube (20); The upper tube (40) includes a front connecting part and a rear connecting part, wherein the front connecting part is detachably connected to the first adapter (30), and the rear connecting part is detachably connected to the middle tube (20). The front connecting portion includes a first groove (41) disposed on the side of the upper tube (40), the first adapter (30) being accommodated in the first groove (41) with a clearance fit, and / or, The rear connection portion includes a second groove (42) disposed on the rear end face of the upper tube (40). The second groove (42) penetrates the upper and lower surfaces of the upper tube (40), and the opening of the second groove (42) faces the middle tube (20). The upper tube (40) can be sleeved on the middle tube (20) through the second groove (42).

2. The bicycle frame according to claim 1, characterized in that, The first groove (41) is located on the lower surface of the upper tube (40) and extends through the front end surface of the upper tube (40).

3. The bicycle frame according to claim 1 or 2, characterized in that, The front connecting part also includes a first through hole (43) provided on the side of the upper tube (40), the first through hole (43) penetrating the bottom wall or side wall of the first groove (41); The bicycle frame also includes a first connector (61), which passes through the first through hole (43) and is connected to the first adapter (30).

4. The bicycle frame according to claim 2, characterized in that, A slot (44) is provided on the front end face of the upper tube (40). When the first adapter (30) is accommodated in the first groove (41) of the upper tube (40), a part of the head tube (10) is adapted to be accommodated in the slot (44).

5. The bicycle frame according to claim 1, characterized in that, The upper tube (40) includes a main body (45), a first arm (46) and a second arm (47). The first arm (46) and the second arm (47) are both connected to the rear end face of the main body (45) and are distributed at intervals along the left and right direction (Z). The first arm (46), the second arm (47) and the main body (45) enclose to form the second groove (42). The first arm (46) and the second arm (47) are both provided with a second through hole (48). The bicycle frame includes at least two second connectors (62), at least one of which is detachably connected to the center tube (20) after passing through a second through hole (48) on the first support arm (46), and at least another second connector (62) is detachably connected to the center tube (20) after passing through a second through hole (48) on the second support arm (47).

6. The bicycle frame according to claim 5, characterized in that, The upper tube (40) is integrally formed, or the main body (45), the first support arm (46) and the second support arm (47) are integrally formed.

7. The bicycle frame according to claim 5, characterized in that, The main body (45) includes a first segment (451), a second segment (452), and a third segment (453) distributed along the front-back direction and connected sequentially; wherein, The first segment (451), the second segment (452), and the third segment (453) are welded together in sequence; or, The first segment (451) and the second segment (452) are integrally formed, and the rear end of the second segment (452) and the front end of the third segment (453) are welded together; or, The second segment (452) and the third segment (453) are integrally formed, and the rear end of the first segment (451) and the front end of the second segment (452) are welded together.

8. The bicycle frame according to claim 7, characterized in that, The front connecting part is disposed at the front end of the first segment (451), and the first support arm (46) and the second support arm (47) are both connected to the rear end of the third segment (453). The first support arm (46) and the second support arm (47) are both welded to the third segment (453), or the first support arm (46), the second support arm (47) and the third segment (453) are integrally formed.

9. The bicycle frame according to claim 5, characterized in that, The bicycle frame also includes a plurality of second adapters (50), each having an internal threaded hole. Accommodation holes are provided on both sides of the center tube (20). At least a portion of the second adapter (50) is accommodated in the accommodation holes, and the second adapter (50) is connected to the center tube (20). The second connector (62) has an external thread, and after passing through the second through hole (48), the second connector (62) is threadedly connected to the internal thread hole of the second adapter (50).

10. The bicycle frame according to claim 9, characterized in that, The second adapter (50) includes a connecting bridge (51) and two bead bodies (52), the two bead bodies (52) being connected to opposite ends of the connecting bridge (51) respectively, and the bead bodies (52) being provided with internal threaded holes; The number of receiving holes is the same as the number of bean bodies (52), and the bean bodies (52) are accommodated in the receiving holes one by one.

11. The bicycle frame according to claim 1, characterized in that, The first adapter (30) includes an arm plate (31), a base (32), a limiting protrusion (33) and a third through hole (34). The limiting protrusion (33) is located on the front surface of the base (32), and the third through hole (34) penetrates the base (32) and the limiting protrusion (33) in the front-back direction. The head tube (10) is provided with a limiting groove (11) and a threaded connection hole (12) located in the limiting groove (11). The bicycle frame also includes a third connector (63), which passes through the third through hole (34) and is threaded to the threaded connection hole (12). The limiting protrusion (33) is inserted into the limiting groove (11) in a matching shape. There are two arm plates (31), which are connected to the rear surface of the base (32) and located on opposite sides of the third through hole (34). The arm plates (31) are connected to the front connecting part of the upper tube (40).

12. A top tube for a bicycle frame, characterized in that, The upper tube (40) includes a front connecting part and a rear connecting part. The front connecting part is used for detachable connection with the head tube (10) of the frame, and the rear connecting part is used for detachable connection with the middle tube (20) of the frame. The front connecting portion includes a first groove (41) and a first through hole (43) disposed on the side of the upper tube (40), the first through hole (43) penetrating the bottom wall or side wall of the first groove (41), and / or, The rear connection part includes a second groove (42) disposed on the rear end face of the upper tube (40). The second groove (42) penetrates the upper and lower surfaces of the upper tube (40), and the opening of the second groove (42) is disposed in the direction from front to back. The upper tube (40) is sleeved on the middle tube (20) through the second groove (42).

13. The top tube of the bicycle frame according to claim 12, characterized in that, The first groove (41) is located on the lower surface of the upper tube (40) and extends through the front end surface of the upper tube (40).

14. The top tube of the bicycle frame according to claim 12, characterized in that, The upper tube (40) includes a main body (45), a first arm (46) and a second arm (47). The first arm (46) and the second arm (47) are both connected to the rear end face of the main body (45) and are distributed at intervals in the left and right direction. The first arm (46), the second arm (47) and the main body (45) enclose to form the second groove (42). The first arm (46) and the second arm (47) are each provided with a second through hole (48), which is used to connect the center tube (20) of the frame.

15. A bicycle, characterized in that, The bicycle includes wheels and a frame, wherein the frame is the frame of the bicycle according to any one of claims 1-11, or the frame includes the top tube of the bicycle frame according to any one of claims 12-14, and the wheels are rotatably mounted on the frame.

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