Waterproof and dustproof bicycle center shaft sealing structure

Abstract

The invention provides a waterproof and dustproof bicycle center shaft sealing structure, and relates to the field of bicycle parts, the waterproof and dustproof bicycle center shaft sealing structure comprises a first assembly, a second assembly, a connection sealing piece, a mounting shaft, a lubrication storage piece, a sealing connection mechanism and a lubrication adding mechanism; the second assembly is in threaded connection with the right side of the first assembly; the number of the connecting sealing pieces is two, and the two connecting sealing pieces are connected to the inner side of the assembling sealing cover in an inserted mode. The mounting shaft is in interference fit with the sealing support bearing; the lubricating storage pieces are fixedly connected to the inner side of the first assembly and the inner side of the second assembly respectively. The combination pin is connected to the inner side of the first combination piece in a sliding mode. The sealing connection mechanism is arranged on the outer side of the first assembly; the two sets of lubrication adding mechanisms are arranged in the lubrication storage piece, the application range of the whole center shaft is widened, the matching degree of the center shaft and a bicycle is guaranteed, and the problem that the adaptability of an existing center shaft and a frame bottom bracket is insufficient is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bicycle parts, in particular to a waterproof and dustproof bicycle middle shaft sealing structure. BACKGROUND

[0002] In the bicycle transmission system, the middle shaft assembly is the core component connecting the left and right cranks and the frame. Its typical structure mainly consists of a shaft body, bearings, a middle shaft bowl and a sealing element. The shaft body is usually made of steel or aluminum alloy material and penetrates the five-way part of the frame. The bearings, mostly ball bearings or bearing, are installed at both ends of the shaft body to support the rotation of the crank. The middle shaft bowl is fixed on both sides of the five-way part of the frame by threading or pressing, providing a mounting base for the bearings.

[0003] The existing patent CN101274654B mainly provides a bicycle middle shaft support including a tubular support portion, an inner tube element and a sealing structure. The tubular support portion includes an inner surface having a first open end and a second open end axially spaced from the first open end. The inner tube element is coaxially arranged within the tubular support portion between the first and second open ends of the tubular support portion. The sealing structure is arranged between the tubular support portion and the inner tube element. The sealing structure is entirely disposed within the tubular support portion between the first and second open ends of the tubular support portion.

[0004] However, the existing bicycle middle shaft is generally of fixed length, but the width of the five-way part of the frame varies for different models of bicycles, resulting in insufficient compatibility of the existing middle shaft with the five-way part of the frame. When the user replaces the middle shaft, if the size deviation exceeds 2mm, it will cause the crank to loosen or make noise after installation, seriously affecting the riding experience. SUMMARY

[0005] Therefore, the present application provides a waterproof and dustproof bicycle middle shaft sealing structure, which can be used for different models of bicycles, improving the application range of the entire middle shaft, ensuring the matching degree of the middle shaft and the bicycle, improving the installation precision of the middle shaft, reducing the noise of the middle shaft, improving the comfort of the user during riding, achieving the dustproof and waterproof effect of the sealing support bearing, avoiding the entry of foreign matter into the inside of the sealing support bearing, improving the use effect of the entire middle shaft, enabling the entire middle shaft to be used in dusty and water environment, achieving the addition of middle shaft lubricating grease, improving the smoothness of the middle shaft during operation, avoiding the one-time addition of lubricating grease, prolonging the use time limit of the lubricating grease, and reducing the maintenance frequency of the middle shaft.

[0006] The application provides a waterproof and dustproof bicycle middle shaft sealing structure, which specifically comprises a first assembly, a second assembly, sealing support bearings, assembly covers, connecting seals, mounting shafts, lubricating storage parts, combination pins, sealing connection mechanisms and lubricating adding mechanisms; the second assembly is threadedly connected to the right side of the first assembly; the sealing support bearings are provided in two groups, and the two groups of sealing support bearings are fixedly connected to the outer sides of the first assembly and the second assembly respectively; the assembly covers are provided in two groups, and the two groups of assembly covers are respectively inserted into the outer sides of the sealing support bearings; the connecting seals are provided in two groups, and the two groups of connecting seals are respectively inserted into the inner sides of the two groups of assembly covers; the mounting shafts are in interference fit with the inner rings of the sealing support bearings; the lubricating storage parts are provided in two groups, and the two groups of lubricating storage parts are fixedly connected to the inner sides of the first assembly and the second assembly respectively, and the outer sides of the two groups of lubricating storage parts are both provided with round hole structures; the combination pins are slidingly connected to the inner sides of the first assembly; the sealing connection mechanisms are arranged on the outer sides of the first assembly; and the lubricating adding mechanisms are provided in two groups and are arranged in the interiors of the lubricating storage parts.

[0007] Further, the sealing connection mechanism comprises mounting limiting buckles and mounting extrusion springs; the mounting limiting buckles are slidingly connected to the inner sides of the assembly covers; one end of the mounting extrusion spring is fixedly connected to the mounting limiting buckle, and the other end is fixedly connected to the assembly cover.

[0008] Further, the sealing connection mechanism further comprises first waterproof sealing rings and wear compensation springs; the first waterproof sealing rings are provided in two groups, and the two groups of first waterproof sealing rings are respectively embedded on the outer peripheral walls of the connecting seals, and the outer sides of the two groups of first waterproof sealing rings are both provided with dust lip structures; the wear compensation springs are arranged in the interiors of the first waterproof sealing rings, and the wear compensation springs are wave spring structures.

[0009] Further, the sealing connection mechanism further comprises second waterproof sealing rings; the second waterproof sealing rings are provided in two groups, and the two groups of second waterproof sealing rings are respectively embedded on the inner peripheral walls of the connecting seals, and the inner sides of the two groups of second waterproof sealing rings are both provided with wave spring structures.

[0010] Further, the sealing connection mechanism further comprises compensation connection slots and compensation connection springs; the compensation connection slots are provided in multiple groups, and the multiple groups of compensation connection slots are all arranged on the left sides of the second assemblies, and the combination pins are in position correspondence with the compensation connection slots; the compensation connection springs are fixedly connected to the left sides of the combination pins, and the left ends of the compensation connection springs are fixedly connected to the first assemblies.

[0011] Further, the lubricating adding mechanism comprises a lubricating adding pipe and a lubricating exhaust pipe; the lubricating adding pipe is fixedly connected above the lubricating storage part and communicates with the inside of the lubricating storage part; the end of the lubricating adding pipe is provided with a sealing cover; the lubricating exhaust pipe is fixedly connected below the lubricating storage part and communicates with the inside of the lubricating storage part; and the end of the lubricating exhaust pipe is provided with a sealing cover.

[0012] Further, the lubricating adding mechanism further comprises a lubricating pressurizing cylinder and a pressurizing air inlet pipe; two groups of the lubricating pressurizing cylinders are fixedly connected to the side walls of the lubricating storage part respectively; the communication parts between the two groups of the lubricating pressurizing cylinders and the lubricating storage part are provided with a one-way valve structure; two groups of the pressurizing air inlet pipes are fixedly connected to the outside of the lubricating pressurizing cylinders respectively; and the communication parts between the two groups of the pressurizing air inlet pipes and the lubricating pressurizing cylinders are provided with a one-way valve structure.

[0013] Further, the lubricating adding mechanism further comprises a lubricating extruding part; two groups of the lubricating extruding parts are slidably connected to the inside of the lubricating pressurizing cylinder respectively; the outside of the two groups of the lubricating extruding parts is provided with a protruding block structure; and the inside of the two groups of the lubricating extruding parts is provided with a piston structure.

[0014] Further, the lubricating adding mechanism further comprises an adding reset spring; two groups of the adding reset springs are fixedly connected to the inside of the lubricating extruding part respectively; and the inside of the two groups of the adding reset springs is fixedly connected with the lubricating pressurizing cylinder.

[0015] Further, the lubricating adding mechanism further comprises an adding trigger part; two groups of the adding trigger parts are fixedly connected to the outer periphery of the mounting shaft.

[0016] Beneficial effects By means of the sealing connecting mechanism, the combined pin is slid to the left, the combined pin is no longer inserted into the inside of the compensation connecting slot, the first combined part and the second combined part are relatively rotated, the distance between the second combined part and the first combined part is adjusted under the action of the threaded connection between the second combined part and the first combined part, the length of the whole middle shaft is adjusted, the combined pin is inserted into the inside of the compensation connecting slot under the action of the compensation connecting spring after the middle shaft is adjusted to a proper length, the position of the second combined part and the first combined part is limited, the whole middle shaft can be applied to different types of bicycles, the application range of the whole middle shaft is improved, the matching degree of the middle shaft and the bicycle is ensured, the installation precision of the middle shaft is improved, the abnormal sound of the middle shaft is reduced, and the comfort of the user during riding is improved.

[0017] The application is characterized in that the sealing connecting mechanism is arranged, the assembly cover is inserted into the two sides of the axle mounting groove in the frame after the first assembly and the second assembly are installed, the assembly cover seals the first assembly and the second assembly at this time, the installation limiting buckle is fixed to the assembly cover under the action of the installation extrusion spring, the installation of the whole axle is facilitated, the installation and dismounting efficiency of the axle is improved, the dustproof and waterproof effect of the sealing support bearing is realized through the arrangement of the first waterproof sealing ring and the second waterproof sealing ring, foreign matters are prevented from entering the inside of the sealing support bearing, the use effect of the whole axle is improved, and the whole axle can be used in a dusty and water-involved environment.

[0018] The application is characterized in that the lubricating adding mechanism is arranged, the adding trigger is rotated by the rotation of the installation shaft, the lubricating extrusion piece is extruded and moved to the inside by the rotation of the adding trigger, the air in the inside of the lubricating pressurizing cylinder is extruded into the inside of the lubricating storage piece when the lubricating extrusion piece moves to the inside, the one-way valve at the connection of the lubricating pressurizing cylinder and the lubricating storage piece is opened at this time, the one-way valve at the connection of the pressurizing air inlet pipe and the lubricating pressurizing cylinder is closed, the one-way valve at the connection of the lubricating pressurizing cylinder and the lubricating storage piece is closed when the adding reset spring extrudes the lubricating extrusion piece to reset, the one-way valve at the connection of the pressurizing air inlet pipe and the lubricating pressurizing cylinder is opened, the air is refilled into the inside of the lubricating pressurizing cylinder, the lubricating grease in the inside of the lubricating storage piece is extruded by the pressurization of the inside of the lubricating storage piece, the adding of the lubricating grease of the axle is realized, the smoothness of the axle during operation is improved, the lubricating grease is prevented from being added at one time, the use time limit of the lubricating grease is prolonged, and the maintenance frequency of the axle is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings of the embodiments will be briefly introduced below.

[0020] The drawings in the following description only relate to some embodiments of the application, rather than limiting the application.

[0021] In the drawings: Figure 1 is a whole structure schematic view of the embodiment of the application.

[0022] Figure 2 is a combined pin structure schematic view of the embodiment of the application.

[0023] Figure 3 is a first waterproof sealing ring structure schematic view of the embodiment of the application.

[0024] Figure 4 is a compensation connecting spring structure schematic view of the embodiment of the application.

[0025] Figure 5It is the second waterproof sealing ring structure schematic diagram of the embodiment of the application.

[0026] Figure 6 It is the adding trigger structure schematic diagram of the embodiment of the application.

[0027] Figure 7 It is the compensation connection slot structure schematic diagram of the embodiment of the application.

[0028] Figure 8 It is the lubricating extrusion piece structure schematic diagram of the embodiment of the application.

[0029] List of reference signs 1, first assembly; 101, installation limit buckle; 102, installation extrusion spring; 103, first waterproof sealing ring; 104, wear compensation spring; 105, second waterproof sealing ring; 106, compensation connection slot; 107, compensation connection spring; 2, second assembly; 3, sealing support bearing; 4, assembly cover; 5, connection sealing piece; 6, installation shaft; 7, lubricating storage piece; 701, lubricating adding pipe; 702, lubricating exhaust pipe; 703, lubricating pressurizing cylinder; 704, pressurizing air inlet pipe; 705, lubricating extrusion piece; 706, adding reset spring; 707, adding trigger; 8, combination pin. DETAILED DESCRIPTION

[0030] Embodiment one: Please refer to Figures 1 to 7 As shown: The application provides a waterproof and dustproof bicycle middle shaft sealing structure, which comprises a first assembly 1, a second assembly 2, a sealing support bearing 3, an assembly cover 4, a connection sealing piece 5, an installation shaft 6, a lubricating storage piece 7, a combination pin 8 and a sealing connection mechanism, the second assembly 2 is screw-connected to the right side of the first assembly 1, the sealing support bearing 3 is provided in two groups, and the two groups of sealing support bearings 3 are fixedly connected to the outer sides of the first assembly 1 and the second assembly 2 respectively, the assembly cover 4 is provided in two groups, and the two groups of assembly covers 4 are respectively inserted into the outer sides of the sealing support bearings 3, the connection sealing piece 5 is provided in two groups, and the two groups of connection sealing pieces 5 are respectively inserted into the inner sides of the two groups of assembly covers 4, the installation shaft 6 is in interference fit with the inner ring of the sealing support bearing 3, the lubricating storage piece 7 is provided in two groups, and the two groups of lubricating storage pieces 7 are fixedly connected to the inner sides of the first assembly 1 and the second assembly 2 respectively, the outer sides of the two groups of lubricating storage pieces 7 are both provided with a round hole structure, the combination pin 8 is slidingly connected to the inner side of the first assembly 1, and the sealing connection mechanism is arranged on the outer side of the first assembly 1.

[0031] The sealing connecting mechanism comprises four sets of installation limiting buckles 101 and four sets of installation extrusion springs 102.

[0032] The sealing connecting mechanism further comprises a first waterproof sealing ring 103 and a wear compensation spring 104.

[0033] The sealing connecting mechanism further comprises a second waterproof sealing ring 105.

[0034] The sealing connecting mechanism further comprises a compensation connecting slot 106 and a compensation connecting spring 107.

[0035] The specific use and role of the embodiment are as follows: when the middle shaft of different models of bicycles needs to be replaced, first, slide the combined pin 8 to the left, the combined pin 8 is no longer inserted into the inner side of the compensation connection slot 106, at this time, relatively rotate the first combined part 1 and the second combined part 2, under the action of the threaded connection between the second combined part 2 and the first combined part 1, the spacing between the second combined part 2 and the first combined part 1 is adjusted, and then the length of the entire middle shaft is adjusted, after the middle shaft is adjusted to a proper length, loosen the combined pin 8, the combined pin 8 is inserted into the inner side of the compensation connection slot 106 under the action of the compensation connection spring 107, the limiting of the second combined part 2 and the first combined part 1 is realized, the entire middle shaft can be suitable for different models of bicycles, the application range of the entire middle shaft is improved, the matching degree of the middle shaft and the bicycle is ensured, the installation precision of the middle shaft is improved, the abnormal sound of the middle shaft is reduced, and the comfort of the user when riding is improved, after the first combined part 1 and the second combined part 2 are installed, the assembly cover 4 is inserted into the two sides of the bicycle middle shaft installation slot, at this time, the assembly cover 4 realizes the sealing of the first combined part 1 and the second combined part 2, the installation limiting buckle 101 is fixed under the action of the installation extrusion spring 102, the fixing of the assembly cover 4 is realized, the installation of the entire middle shaft is facilitated, the installation and disassembly efficiency of the middle shaft is improved, through the setting of the first waterproof sealing ring 103 and the second waterproof sealing ring 105, the dustproof and waterproof effect of the sealed supporting bearing 3 is realized, foreign matters in the outside are prevented from entering the inside of the sealed supporting bearing 3, the use effect of the entire middle shaft is improved, and the entire middle shaft can be used in a dusty and water environment.

[0036] Embodiment two As Figures 1 to 8 shown The application provides a waterproof and dustproof bicycle middle shaft sealing structure, and further comprises lubricating adding mechanisms on the basis of embodiment one, and the two groups of lubricating adding mechanisms are arranged in the inside of the lubricating storage part 7.

[0037] The lubricating adding mechanism comprises lubricating adding pipes 701 and lubricating exhaust pipes 702; the lubricating adding pipes 701 are fixedly connected above the lubricating storage part 7, the lubricating adding pipes 701 are in communication with the inside of the lubricating storage part 7, and the end of the lubricating adding pipe 701 is provided with a sealing cover; the lubricating exhaust pipes 702 are fixedly connected below the lubricating storage part 7, the lubricating exhaust pipes 702 are in communication with the inside of the lubricating storage part 7, and the end of the lubricating exhaust pipe 702 is provided with a sealing cover.

[0038] The lubricating adding mechanism further comprises: two lubricating pressurizing cylinders 703 and two pressurized air inlet pipes 704. The two lubricating pressurizing cylinders 703 are fixedly connected to the outer side of the lubricating storage member 7, and one-way valve structures are arranged at the communication positions of the two lubricating pressurizing cylinders 703 and the lubricating storage member 7. The two pressurized air inlet pipes 704 are fixedly connected to the outer side of the lubricating pressurizing cylinder 703, and one-way valve structures are arranged at the communication positions of the two pressurized air inlet pipes 704 and the lubricating pressurizing cylinder 703.

[0039] The lubricating adding mechanism further comprises: two lubricating extruding members 705. The two lubricating extruding members 705 are slidably connected to the inner side of the lubricating pressurizing cylinder 703, and protruding block structures are arranged on the outer side of the two lubricating extruding members 705, and piston structures are arranged on the inner side of the two lubricating extruding members 705.

[0040] The lubricating adding mechanism further comprises: two adding return springs 706. The two adding return springs 706 are fixedly connected to the inner side of the lubricating extruding member 705, and the inner side of the two adding return springs 706 is fixedly connected with the lubricating pressurizing cylinder 703.

[0041] The lubricating adding mechanism further comprises: two adding trigger members 707. The two adding trigger members 707 are fixedly connected to the outer periphery of the mounting shaft 6.

[0042] The specific use and role of the embodiment are as follows: when the user is riding, the adding trigger 707 is rotated by the rotation of the mounting shaft 6, the adding trigger 707 rotates in turn to extrude the lubricating extrusion piece 705, the lubricating extrusion piece 705 is extruded to move inward, the lubricating extrusion piece 705 moves inward to extrude the air in the lubricating pressurizing cylinder 703 into the inside of the lubricating storage piece 7, at this time, the one-way valve at the connection of the lubricating pressurizing cylinder 703 and the lubricating storage piece 7 is opened, the one-way valve at the connection of the pressurizing air pipe 704 and the lubricating pressurizing cylinder 703 is closed, when the adding reset spring 706 extrudes the lubricating extrusion piece 705 to reset, the one-way valve at the connection of the lubricating pressurizing cylinder 703 and the lubricating storage piece 7 is closed, the one-way valve at the connection of the pressurizing air pipe 704 and the lubricating pressurizing cylinder 703 is opened, the air is filled into the inside of the lubricating pressurizing cylinder 703 again, the lubricating grease in the inside of the lubricating storage piece 7 is extruded by the pressurization, the adding of the lubricating grease of the middle shaft is realized, the fluency of the middle shaft in operation is improved, the lubricating grease is not added at one time, the use time limit of the lubricating grease is prolonged, the maintenance frequency of the middle shaft is reduced, when the use of the lubricating grease in the lubricating storage piece 7 is completed, the sealing cover of the lubricating adding pipe 701 and the lubricating exhaust pipe 702 is taken off, the lubricating grease is injected into the inside of the lubricating storage piece 7 through the lubricating adding pipe 701, until the lubricating grease flows out of the lubricating exhaust pipe 702, the lubrication of the middle shaft is facilitated.

[0043] In this paper, the following points need attention: 1. The drawings of the embodiment only relate to the structure involved in the embodiment, and other structures can refer to the general design.

[0044] 2. In the case of no conflict, the features in the embodiment and the embodiment can be combined to obtain a new embodiment.

[0045] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A waterproof and dustproof bicycle axle sealing structure, characterized in that: The assembly includes a first assembly (1), a second assembly (2), a sealed support bearing (3), an assembly cover (4), a connecting seal (5), a mounting shaft (6), a lubrication storage component (7), a combination pin (8), a sealing connection mechanism, and a lubrication addition mechanism; the second assembly (2) is threadedly connected to the right side of the first assembly (1); the sealed support bearing (3) is provided in two sets, and the two sets of sealed support bearings (3) are respectively fixedly connected to the outside of the first assembly (1) and the second assembly (2); the assembly cover (4) is provided in two sets, and the two sets of assembly covers (4) are respectively inserted into the outside of the sealed support bearing (3); the connecting seal (5) is provided in two sets. Two sets of connecting seals (5) are respectively inserted into the inner side of the two sets of assembled covers (4); the mounting shaft (6) is interference-fitted with the inner ring of the sealing support bearing (3); two sets of lubrication storage components (7) are provided, and the two sets of lubrication storage components (7) are respectively fixedly connected to the inner side of the first assembly (1) and the second assembly (2), and the outer side of the two sets of lubrication storage components (7) is provided with a round hole structure; the combination pin (8) is slidably connected to the inner side of the first assembly (1); the sealing connection mechanism is provided on the outer side of the first assembly (1); two sets of lubrication adding mechanisms are provided, and the two sets of lubrication adding mechanisms are both located inside the lubrication storage components (7).

2. The waterproof and dustproof bicycle axle sealing structure as described in claim 1, characterized in that: The sealing connection mechanism includes: a mounting limit buckle (101) and a mounting compression spring (102); the mounting limit buckle (101) is slidably connected to the inner side of the assembled cover (4); one end of the mounting compression spring (102) is fixedly connected to the mounting limit buckle (101), and the other end is fixedly connected to the assembled cover (4).

3. The waterproof and dustproof bicycle axle sealing structure as described in claim 2, characterized in that: The sealing connection mechanism further includes: a first waterproof sealing ring (103) and a wear compensation spring (104); the first waterproof sealing ring (103) is provided in two sets, and the two sets of first waterproof sealing rings (103) are respectively embedded on the outer peripheral wall of the connecting seal (5), and the outer side of the two sets of first waterproof sealing rings (103) is provided with a dustproof lip structure; the wear compensation spring (104) is provided inside the first waterproof sealing ring (103), and the wear compensation spring (104) is a wave spring structure.

4. The waterproof and dustproof bicycle axle sealing structure as described in claim 3, characterized in that: The sealing connection mechanism further includes: a second waterproof sealing ring (105); two sets of the second waterproof sealing ring (105) are provided, and the two sets of the second waterproof sealing ring (105) are respectively embedded on the inner peripheral wall of the connecting seal (5), and the inner side of the two sets of the second waterproof sealing ring (105) is provided with a wave spring structure.

5. The waterproof and dustproof bicycle axle sealing structure as described in claim 4, characterized in that: The sealing connection mechanism further includes: a compensation connection slot (106) and a compensation connection spring (107); the compensation connection slot (106) is provided in multiple sets, and the multiple sets of compensation connection slots (106) are all opened on the left side of the second assembly (2), and the combination pin (8) corresponds to the position of the compensation connection slot (106); the compensation connection spring (107) is fixedly connected to the left side of the combination pin (8), and the left end of the compensation connection spring (107) is fixedly connected to the first assembly (1).

6. The waterproof and dustproof bicycle axle sealing structure as described in claim 1, characterized in that: The lubrication adding mechanism includes a lubrication adding pipe (701) and a lubrication venting pipe (702); the lubrication adding pipe (701) is fixedly connected above the lubrication storage component (7), the lubrication adding pipe (701) communicates with the inside of the lubrication storage component (7), and a sealing cap is provided at the end of the lubrication adding pipe (701); the lubrication venting pipe (702) is fixedly connected below the lubrication storage component (7), the lubrication venting pipe (702) communicates with the inside of the lubrication storage component (7), and a sealing cap is provided at the end of the lubrication venting pipe (702).

7. The waterproof and dustproof bicycle axle sealing structure as described in claim 6, characterized in that: The lubrication adding mechanism also includes: a lubrication pressurizing cylinder (703) and a pressurizing air inlet pipe (704); two sets of the lubrication pressurizing cylinder (703) are provided, and the two sets of lubrication pressurizing cylinders (703) are respectively fixedly connected to the side wall of the lubrication storage component (7), and a one-way valve structure is provided at the connection between the two sets of lubrication pressurizing cylinders (703) and the lubrication storage component (7); two sets of the pressurizing air inlet pipe (704) are provided, and the two sets of pressurizing air inlet pipes (704) are respectively fixedly connected to the outside of the lubrication pressurizing cylinder (703), and a one-way valve structure is provided at the connection between the two sets of pressurizing air inlet pipes (704) and the lubrication pressurizing cylinder (703).

8. The waterproof and dustproof bicycle axle sealing structure as described in claim 7, characterized in that: The lubrication adding mechanism also includes: a lubrication extrusion component (705); the lubrication extrusion component (705) is provided in two sets, and the two sets of lubrication extrusion components (705) are slidably connected inside the lubrication pressure cylinder (703). The outer side of the two sets of lubrication extrusion components (705) is provided with a protrusion structure, and the inner side of the two sets of lubrication extrusion components (705) is provided with a piston structure.

9. The waterproof and dustproof bicycle axle sealing structure as described in claim 8, characterized in that: The lubrication adding mechanism also includes: adding a return spring (706); there are two sets of adding return springs (706), and the two sets of adding return springs (706) are fixedly connected to the inner side of the lubrication extrusion component (705), and the inner side of the two sets of adding return springs (706) is fixedly connected to the lubrication pressure cylinder (703).

10. The waterproof and dustproof bicycle axle sealing structure as described in claim 9, characterized in that: The lubrication addition mechanism also includes an addition trigger (707); two sets of addition triggers (707) are provided, and the two sets of addition triggers (707) are respectively fixedly connected to the outer periphery of the mounting shaft (6).

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