Belt tensioner, ear, frame and bicycle

Abstract

The application relates to the technical field of bicycles, in particular to a belt tensioner, an ear, a frame and a bicycle. The belt tensioner comprises a mounting piece, a fixing piece and an adjusting bolt. The fixing piece is provided with a bolt mounting through hole and a clamping groove; one end of the adjusting bolt is in threaded cooperation with the bolt through hole of the mounting piece, and the other end of the adjusting bolt is adjustably mounted on the fixing piece; the adjusting bolt moves axially on the fixing piece to drive the mounting piece to move. In the application, if the frame of the application is provided with the belt tensioner of the application, the belt tensioner can enable the frame to adapt to a belt driving system; if the frame of the application is provided with the ear provided by the embodiment of the application, the ear can enable the frame of the application to adapt to a chain wheel driving system; therefore, the frame provided by the embodiment of the application and the bicycle adopting the frame can adapt to different driving systems, the production management cost, the storage cost are reduced, and the product research and development cycle is shortened.

Description

Technical Field

[0001] This application relates to the field of bicycle technology, and more specifically, to belt tensioners, lugs, frames, and bicycles. Background Technology

[0002] In the bicycle manufacturing industry, chain drive and belt drive are two common power transmission methods. Chain drive systems, such as Shimano's externally derailleur 9-speed chain drive, have advantages such as high transmission efficiency and relatively low maintenance costs, and are widely used in various mountain bikes and road bikes. Belt drive systems, such as Shimano's internally derailleur 8-speed belt drive, are characterized by maintenance-free operation, quiet operation, and clean performance, and are very popular in urban commuter bicycles.

[0003] However, current bicycle frame designs are often geared towards a single drive system. To produce bicycles with different drive systems, separate frames must be designed and manufactured, resulting in a large number of frame SKUs. Too many SKUs not only increase production management and warehousing costs but also prolong product development cycles, hindering companies' ability to quickly respond to market demands and reduce costs. For example, one bicycle manufacturer experienced a 15% increase in production management costs and a 50% increase in warehouse space occupancy due to producing separate chain-driven and belt-driven frames. Utility Model Content

[0004] The purpose of this application is to provide a belt tensioner, a lug, a frame, a bicycle, and a bicycle that can be adapted to different types of drive systems, reducing manufacturing and warehousing costs and shortening the research and development cycle.

[0005] To achieve the above objectives, in a first aspect, the belt tensioner provided by this utility model includes: The mounting component has a first anti-rotation sliding block fixedly provided on it, the first anti-rotation sliding block has a bolt through hole, and the mounting component has a shaft mounting through hole. The fastener is provided with bolt mounting through holes and snap-fit ​​grooves; An adjusting bolt is provided, one end of which is threaded into the bolt through hole on the mounting component, and the other end of which is adjustablely mounted on the fixing component. The axial movement of the adjusting bolt on the fixing component drives the mounting component to move.

[0006] In an optional embodiment, an adjusting nut is further included, which is threaded to the other end of the adjusting bolt, and the adjusting nut is located on the side wall of the fixing member away from the mounting member.

[0007] In an optional embodiment, a stepped gear sleeve and a stepped gear ring are also included. The stepped gear sleeve is sleeved on the other end of the adjusting bolt and located on the side wall of the fixing member away from the mounting member. The stepped gear sleeve is provided with a plurality of first meshing teeth and the height of the plurality of first meshing teeth increases sequentially along the axial direction. The stepped gear ring is fixedly disposed at the other end of the adjusting bolt. The stepped gear ring is provided with a second meshing tooth, which meshes with the first meshing tooth. The second meshing tooth switches to mesh with the first meshing tooth at different heights to adjust the axial displacement of the adjusting bolt, thereby adjusting the axial displacement of the mounting component.

[0008] In an optional embodiment, a second anti-rotation sliding block is further included. The second anti-rotation sliding block is fixedly disposed on the mounting member. The first anti-rotation sliding block is located on one side of the shaft mounting through hole, and the second anti-rotation sliding block is located on the other side of the shaft mounting through hole.

[0009] In an optional embodiment, the first anti-rotation sliding block is provided with a first anti-rotation end face, and the second anti-rotation sliding block is provided with a second anti-rotation end face, with the first anti-rotation end face and the second anti-rotation end face being in a relative position.

[0010] Secondly, the hook provided by this utility model includes: The ear-mount body has a first anti-rotation mating block fixedly provided on it, and the ear-mount body also has a shaft mounting through hole. An expansion mounting block is fixedly mounted on the lug body, and the expansion mounting block is provided with an expansion through hole.

[0011] In an optional embodiment, a second anti-rotation fitting block is further included. The second anti-rotation fitting block is fixedly disposed on the side of the lug body near the shaft mounting through hole, and the first anti-rotation fitting block is fixedly disposed on the other side of the lug body near the shaft mounting through hole.

[0012] Thirdly, the vehicle frame provided by this utility model includes: The frame body has a rear fork and pedal axle mounting positions. The rear fork has a horizontally extending mounting slot. The height difference between the mounting slot and the pedal axle mounting position is L, where 0 ≤ L ≤ 3 cm. As described in any of the foregoing embodiments, the first anti-rotation sliding block slides against the inner wall of the mounting slot, and the fixing member is fixedly installed on the rear fork near the mounting slot.

[0013] Fourthly, the frame provided by this utility model includes: The frame body has mounting positions for a rear fork and a pedal axle, and the rear fork has a mounting slot extending horizontally. The height difference between the mounting groove and the foot pedal shaft mounting position is L, where 0 ≤ L ≤ 3 cm; As described in the aforementioned embodiments, the hanging ear body is fixedly installed at the mounting slot of the rear fork, and the first anti-rotation mating block abuts against the inner wall of the mounting slot.

[0014] Fifthly, the bicycle provided by this utility model includes the frame as described in the foregoing embodiments.

[0015] In this application, if the belt tensioner of this application is installed on the frame of this application, the belt tensioner can make the frame adaptable to the belt drive system. If the hanging lug provided in the embodiment of this application is installed on the frame of this application, the hanging lug can make the frame adaptable to the sprocket drive system. Therefore, the frame provided in the embodiment of this application and the bicycle using the frame can adapt to different drive systems, reducing production management costs, warehousing costs, and shortening the product development cycle.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The diagram illustrates the structure of the bicycle described in this application; Figure 2 The diagram illustrates the structure of the vehicle frame in this application; Figure 3 and Figure 4 The diagram illustrates the structure of the vehicle frame and the belt tensioner of this application; Figure 5 and Figure 6 The structure of a vehicle belt tensioner according to one embodiment of this application is illustrated; Figure 7 This illustration shows the structure of a vehicle belt tensioner according to another embodiment of this application; Figure 8 and Figure 9 The diagram illustrates the structure of the frame and the structure of the mounting lugs in this application; Figure 10 and Figure 11 The diagram illustrates the structure of the ear loop in this application.

[0019] icon: 100-Bicycle; 200 - Frame; 210 - Frame body; 220 - Pedal pivot mounting position; 230 - Rear fork; 240 - Mounting slot; 300 - Belt tensioner; 310 - Mounting component; 311 - First anti-rotation sliding block; 312 - First anti-rotation end face; 313 - Second anti-rotation sliding block; 314 - Second anti-rotation end face; 315 - Shaft mounting through hole; 320 - Fixing component; 321 - Snap-fit ​​groove; 330 - Adjusting bolt; 340 - Adjusting nut; 350 - Stepped gear sleeve; 351 - First meshing tooth; 360 - Stepped gear ring; 361 - Second meshing tooth; 400-Hanging ear; 410-Hanging ear body; 411-First anti-rotation mating block; 412-Shaft mounting through hole; 413-Second anti-rotation mating block; 420-Extension mounting block; 421-Extension through hole; 430-Protrusion block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Embodiments of this application provide a belt tensioner 300, a lug 400, a frame 200, and a bicycle 100. Figure 1 The diagram illustrates the structure of a bicycle 100 provided in an embodiment of this application; Figure 2 The diagram illustrates the structure of the frame 200 that can be applied to the bicycle 100; Figure 3 and Figure 4 The diagram illustrates the structure of the frame 200 and the structure of the belt tensioner 300 mounted on the frame 200, wherein the mounted belt tensioner 300 enables the frame 200 to be adapted to a belt drive system. Figures 5 to 7 The structure of the belt tensioner 300 is illustrated, in which, Figure 5 and Figure 6 Technical solutions that can be considered as the same embodiment Figure 7 It can be regarded as being with Figure 5 and Figure 6 Technical solutions in different embodiments; Figure 8 and Figure 9 The diagram illustrates the structure of the frame 200 and the structure of the lug 400 mounted on the frame 200, wherein the mounted lug 400 enables the frame 200 to be adapted to a sprocket drive system. Figure 10 and Figure 11 The structure of the 400 loop is illustrated.

[0024] Figure 3 and Figure 8 The frame 200 of this application has the same structure. If the belt tensioner 300 provided in the embodiment of this application is installed on the frame 200, the belt tensioner 300 can make the frame 200 adaptable to the belt drive system. If the hanger 400 provided in the embodiment of this application is installed on the frame 200, the hanger 400 can make the frame 200 adaptable to the sprocket drive system. Therefore, the frame 200 provided in the embodiment of this application and the bicycle 100 using the frame 200 can adapt to different drive systems, reducing production management costs, warehousing costs, and shortening the product development cycle.

[0025] In a first aspect, embodiments of this application provide a belt tensioner 300, including a mounting member 310, a fixing member 320, and an adjusting bolt 330.

[0026] like Figure 5 and Figure 6 As shown, a first anti-rotation sliding block 311 is fixedly installed on the mounting component 310, and the fixing method is, for example, welding or integral molding.

[0027] The first anti-rotation sliding block 311 is provided with a bolt through hole, and the mounting part 310 is provided with a shaft mounting through hole 315; for example Figure 3 and Figure 4As shown, the shaft mounting through hole 315 is used to mount the shaft of a wheel (e.g., a rear wheel).

[0028] like Figure 6 As shown, the fastener 320 is provided with bolt mounting through holes and snap-fit ​​grooves 321.

[0029] like Figure 3 and Figure 4 As shown, the fastener 320 is fixedly mounted on the rear fork 230 of the frame 200, and the fixing method is, for example, an interference fit. However, in another embodiment, the rear fork 230 of the frame 200 is provided with a connecting groove, and the fastener 320 is snapped into the connecting groove of the rear fork 230.

[0030] For example, such as Figure 3 and Figure 4 As shown, the fastener 320 is configured in a U-shape.

[0031] One end of the adjusting bolt 330 is threaded into the bolt through hole on the mounting part 310. During use, after one end of the adjusting bolt 330 is installed on the bolt through hole of the mounting part 310, it presses against the wheel axle, thereby fixing the adjusting bolt 330 relative to the mounting part 310.

[0032] like Figure 6 or Figure 7 As shown, the other end of the adjusting bolt 330 is adjustablely mounted on the fixing member 320. The axial movement of the adjusting bolt 330 on the fixing member 320 causes the mounting member 310 to move; as... Figure 3 and Figure 4 As shown, the mounting part 310 is provided with a wheel shaft and a pulley. The position of the mounting part 310 is adjusted to adjust the tension of the belt.

[0033] To make the position of adjusting bolt 330 adjustable, such as Figure 6 As shown, in one embodiment, the belt tensioner 300 further includes an adjusting nut 340, which is threaded to the other end of the adjusting bolt 330, and the adjusting nut 340 is located on the side wall of the fixing member 320 away from the mounting member 310.

[0034] After one end of the adjusting bolt 330 is pressed against the wheel axle, it is fixed relative to the mounting part 310. Rotating the adjusting nut 340 causes the adjusting bolt 330 to drive the mounting part 310 and the pulley to move axially, thereby adjusting the tension of the belt.

[0035] Unlike the technical solution in the above embodiment where the belt tensioner 300 also includes an adjusting nut 340, such as... Figure 7 As shown, in another embodiment, the belt tensioner 300 further includes a stepped gear sleeve 350 and a stepped gear ring 360.

[0036] like Figure 7 As shown, the stepped gear sleeve 350 is sleeved on the other end of the adjusting bolt 330 and located on the side wall of the fixing member 320 away from the mounting member 310. The stepped gear sleeve 350 can rotate relative to the adjusting bolt 330.

[0037] The stepped gear sleeve 350 is provided with a plurality of first meshing teeth 351, and the height of the plurality of first meshing teeth 351 increases sequentially along the axial direction.

[0038] The stepped gear ring 360 is fixedly mounted on the other end of the adjusting bolt 330, and the fixing method is, for example, welding, snap-fitting or bolt connection.

[0039] The stepped gear ring 360 is provided with a second meshing tooth 361, which meshes with the first meshing tooth 351.

[0040] During use, first pull the adjusting bolt 330 to disengage the stepped gear sleeve 350 and the stepped gear ring 360. Then, rotate the stepped gear ring 360 to switch the higher-height second meshing tooth 361 on the stepped gear ring 360 to correspond with the first meshing tooth 351 on the stepped gear sleeve 350. Loosen the adjusting bolt 330, and the belt of the belt drive system will spring back, causing the adjusting bolt 330 to move, so that the first meshing tooth 351 engages with different second meshing teeth 361, thereby adjusting the position of the adjusting bolt 330 and tightening the belt. If it is necessary to loosen the belt drive system, it is necessary to switch the lower-height second meshing tooth 361 on the stepped gear ring 360 to correspond with the first meshing tooth 351 on the stepped gear sleeve 350.

[0041] like Figure 6 As shown, in one embodiment, the belt tensioner 300 further includes a second anti-rotation sliding block 313, which is fixedly mounted on the mounting member 310, for example by welding or integral molding.

[0042] The first anti-rotation sliding block 311 is located on one side of the shaft mounting through hole 315, and the second anti-rotation sliding block 313 is located on the other side of the shaft mounting through hole 315.

[0043] like Figure 4 and Figure 6 As shown, the first anti-rotation sliding block 311 and the second anti-rotation sliding block 313 slide in cooperation with the inner wall of the mounting slot 240 on the rear fork 230. The first anti-rotation sliding block 311 and the second anti-rotation sliding block 313 can further ensure the smooth sliding adjustment of the mounting part 310 on the rear fork 230.

[0044] like Figure 5 and Figure 6As shown, in one embodiment, the first anti-rotation sliding block 311 is provided with a first anti-rotation end face 312, and the second anti-rotation sliding block 313 is provided with a second anti-rotation end face 314, with the first anti-rotation end face 312 and the second anti-rotation end face 314 in a relative position.

[0045] The first anti-rotation end face 312 and the second anti-rotation end face 314 are used to cooperate with the wheel axle. The wheel axle is also provided with an anti-rotation end face and cooperates with the first anti-rotation end face 312 and the second anti-rotation end face 314, so that the wheel axle can be inserted into the mounting part 310 from the axle mounting through hole 315, but it is fixed to the mounting part 310 in the rotation direction.

[0046] Secondly, embodiments of this application also provide an ear loop 400, such as Figure 8 and Figure 9 As shown, the ear loop 400 includes an ear loop body 410 and an extension mounting block 420.

[0047] like Figure 10 As shown, a first anti-rotation mating block 411 is fixedly installed on the lug body 410. The first anti-rotation mating block 411 is fixedly installed on the lug body 410 by welding or integral molding. The lug body 410 is installed into the mounting slot 240 of the rear fork 230 through the first anti-rotation mating block 411, and the outer wall of the first anti-rotation mating block 411 abuts against the inner wall of the mounting slot 240.

[0048] like Figure 10 As shown, the lug body 410 also has a shaft mounting through hole 412. The shaft mounting through hole 412 of the lug body 410 is used to mount the wheel axle.

[0049] like Figure 10 As shown, the extension mounting block 420 is fixedly mounted on the lug body 410, and the fixing method is, for example, welding or integral molding.

[0050] like Figure 10 As shown, the expansion mounting block 420 is provided with an expansion through hole 421.

[0051] The main body of the sprocket drive system is mounted on the wheel axle, and the transmission module of the sprocket drive system is mounted at the expansion through hole 421 of the expansion mounting block 420.

[0052] like Figure 11 As shown, in one embodiment, a protrusion 430 is fixedly provided on the side wall of the second anti-rotation mating block 413 away from the lug body 410. The fixing method is, for example, welding or integral molding. The protrusion 430 can protect the transmission module located at the extension mounting block 420 from collision with the ground or stone.

[0053] like Figure 11As shown, in one embodiment, the ear loop 400 further includes a second anti-rotation mating block 413, which is fixedly disposed on the ear loop body 410 near the shaft mounting through hole 412, and the first anti-rotation mating block 411 is fixedly disposed on the ear loop body 410 near the other side of the shaft mounting through hole 412.

[0054] The second anti-rotation mating block 413 is fixed to the lug body 410 by means of welding or integral molding, for example.

[0055] The outer wall of the second anti-rotation mating block 413 mates with the inner wall of the mounting slot 240 of the rear fork 230. The first anti-rotation mating block 411 and the second anti-rotation mating block 413 can further prevent the lug body 410 from rotating or loosening on the rear fork 230, ensuring that the lug body 410 is more reliably installed on the rear fork 230.

[0056] like Figure 3 As shown, in a third aspect, embodiments of this application also provide a frame 200, including a frame body 210 and a belt tensioner 300 as described in any of the above embodiments.

[0057] like Figure 1 and Figure 2 As shown, the frame body 210 is provided with a rear fork 230 and a pedal axle mounting position 220. The rear fork 230 is provided with a horizontally extending mounting slot 240. The mounting slot 240 provides a mounting base for the belt tensioner 300.

[0058] To facilitate the sensor's acquisition of data from the rear wheel, the height difference between the mounting slot 240 and the pedal axle mounting position 220 is L, where 0 ≤ L ≤ 3 cm, bringing the wheel closer to the sensor at the rear fork 230. Compared to extending the sensor mounting bracket to bring the sensor closer to the wheel, the frame 200 provided in this embodiment of the application, by increasing the height of the rear fork 230, is less expensive and saves costs.

[0059] The outer wall of the first anti-rotation sliding block 311 and the outer wall of the second anti-rotation sliding block 313 slide in engagement with the inner wall of the mounting slot 240, and the fixing member 320 is fixedly installed on the rear fork 230 near the mounting slot 240.

[0060] The belt tensioner 300 enables the frame 200 of this embodiment to be matched with the belt drive system.

[0061] Fourthly, this application also provides a frame 200 of another embodiment. The frame 200 of this embodiment has the same structure as the frame 200 of the above embodiments, but a mounting lug 400 is provided at the mounting through slot 240 so that the frame 200 can be matched with the sprocket drive system. The mounting lug 400 is the mounting lug 400 of any of the above embodiments.

[0062] The lug body 410 is fixedly installed in the mounting slot 240 of the rear fork 230, and the outer wall of the first anti-rotation mating block 411 and the outer wall of the second anti-rotation mating block 413 abut against the inner wall of the mounting slot 240.

[0063] Fifthly, such as Figure 1 As shown, embodiments of this application also provide a bicycle 100, including a frame 200 with a belt tensioner 300. However, in another embodiment, the bicycle 100 includes a frame 200 with a lug 400.

[0064] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0065] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A belt tensioner, characterized in that, include: Mounting component (310), on which a first anti-rotation sliding block (311) is fixedly provided, and a bolt through hole is provided on the first anti-rotation sliding block (311), and a shaft mounting through hole (315) is provided on the mounting component (310). The fastener (320) is provided with bolt mounting through holes and snap-fit ​​grooves (321); An adjusting bolt (330) is provided, one end of which is threaded into the bolt through hole on the mounting member (310), and the other end of which is adjustablely mounted on the fixing member (320). The adjusting bolt (330) moves axially on the fixing member (320) to drive the mounting member (310) to move.

2. The belt tensioner according to claim 1, characterized in that, It also includes an adjusting nut (340), which is threaded to the other end of the adjusting bolt (330), and the adjusting nut (340) is located on the side wall of the fixing member (320) away from the mounting member (310).

3. The belt tensioner according to claim 1, characterized in that, It also includes a stepped gear sleeve (350) and a stepped gear ring (360). The stepped gear sleeve (350) is sleeved on the other end of the adjusting bolt (330) and located on the side wall of the fixing member (320) away from the mounting member (310). The stepped gear sleeve (350) is provided with a plurality of first meshing teeth (351) and the height of the plurality of first meshing teeth (351) increases sequentially along the axial direction. The stepped gear ring (360) is fixedly disposed at the other end of the adjusting bolt (330). The stepped gear ring (360) is provided with a second meshing tooth (361). The second meshing tooth (361) meshes with the first meshing tooth (351). The second meshing tooth (361) switches the engagement of the first meshing tooth (351) at different heights to adjust the axial displacement of the adjusting bolt (330), thereby adjusting the axial displacement of the mounting part (310).

4. The belt tensioner according to claim 1, characterized in that, It also includes a second anti-rotation sliding block (313), which is fixedly disposed on the mounting member (310). The first anti-rotation sliding block (311) is located on one side of the shaft mounting through hole (315), and the second anti-rotation sliding block (313) is located on the other side of the shaft mounting through hole (315).

5. The belt tensioner according to claim 4, characterized in that, The first anti-rotation sliding block (311) is provided with a first anti-rotation end face (312), and the second anti-rotation sliding block (313) is provided with a second anti-rotation end face (314). The first anti-rotation end face (312) and the second anti-rotation end face (314) are in relative positions.

6. Ear loop, characterized in that, include: The ear-mount body (410) is provided with a first anti-rotation mating block (411) and a shaft mounting through hole (412). An expansion mounting block (420) is fixedly mounted on the ear body (410), and an expansion through hole (421) is provided on the expansion mounting block (420).

7. The loop ear according to claim 6, characterized in that, It also includes a second anti-rotation fitting block (413), which is fixedly disposed on the side of the ear body (410) near the shaft mounting through hole (412), and the first anti-rotation fitting block (411) is fixedly disposed on the other side of the ear body (410) near the shaft mounting through hole (412).

8. A frame, characterized in that, include: The frame body (210) is provided with a rear fork (230) and a pedal axle mounting position (220). The rear fork (230) is provided with a mounting groove (240) extending in the horizontal direction. The height difference between the mounting groove (240) and the pedal axle mounting position (220) is L, where 0≤L≤3cm. In the belt tensioner (300) as described in any one of claims 1 to 5, the first anti-rotation sliding block (311) slides in cooperation with the inner wall of the mounting slot (240), and the fixing member (320) is fixedly installed on the rear fork (230) near the mounting slot (240).

9. A frame, characterized in that, include: The frame body (210) is provided with a rear fork (230) and a pedal pivot mounting position (220). The rear fork (230) is provided with a mounting slot (240) extending in the horizontal direction. The height difference between the mounting groove (240) and the foot pedal shaft mounting position (220) is L, where 0≤L≤3cm; As described in claim 6 or 7, the lug (400) body (410) is fixedly installed in the mounting slot (240) of the rear fork (230), and the first anti-rotation mating block (411) abuts against the inner wall of the mounting slot (240).

10. A bicycle, characterized in that, Includes the frame (200) as described in claim 8 or 9.

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