Hidden hydraulic operating device and bicycle

Abstract

The utility model discloses a hidden type hydraulic operating device and a bicycle, the hidden type hydraulic operating device is used for being installed in a handlebar of the bicycle, the hidden type hydraulic operating device comprises a piston assembly and a piston cylinder, the piston assembly comprises a piston rod, a stay wire and a fixing piece, a piston cavity is arranged in the piston cylinder, and the piston rod is movably installed in the piston cavity; the piston rod is connected with the fixing piece; one end of the pull wire sequentially penetrates through the piston cylinder, the piston cavity, the piston rod and the fixing piece and is connected with the fixing piece, and the other end of the pull wire is connected with a brake rod of the bicycle. A containing cavity is formed in the handlebar, and the piston cylinder is installed in the containing cavity. The piston rod is pulled to move through the pull wire so as to push brake oil, part of a wire brake is changed into an oil brake, the length of a wire pipe is shortened, the friction force between the pull wire and a sleeve is reduced, and therefore the brake hand feeling is improved, meanwhile, the hidden type hydraulic operation device is installed in the handlebar, the hidden type hydraulic operation device and the handlebar are mixed into a whole, and the brake efficiency is improved. And the wind resistance during riding of the bicycle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, in particular to a hidden hydraulic operating device and a bicycle. Background Art

[0002] Traditional cable-pull disc brake systems usually use steel wire as the transmission medium. By manually pulling the steel wire, the piston or brake pad in the brake caliper moves, and then clamps the disc to achieve braking. However, this transmission method has a significant friction problem. The contact surface between the steel wire and the casing will produce friction during the braking process. This friction gradually increases as the steel wire is stretched and the casing wears. When the rider brakes, these friction forces need to be overcome to effectively transfer power to the brake caliper, which makes the brake feel hard and the braking experience poor; at the same time, long-term friction will cause wear on the steel wire and casing, causing a series of safety hazards. Utility Model Content

[0003] The utility model aims to provide a concealed hydraulic operating device and a bicycle, aiming to solve the problem of poor braking experience of a cable-pull disc brake system.

[0004] The utility model provides a hidden hydraulic operating device for installation in the handlebar of a bicycle, comprising: a piston assembly and a piston cylinder, the piston assembly comprising a piston rod, a pull wire and a fixing member, a piston cavity is provided in the piston cylinder, and the piston rod is movably installed in the piston cavity; the piston rod is connected to the fixing member; one end of the pull wire passes through the piston cylinder, the piston cavity, the piston rod and the fixing member in sequence and is connected to the fixing member, and the other end of the pull wire is connected to the brake lever of the bicycle; an accommodating cavity is provided on the handlebar, and the piston cylinder is installed in the accommodating cavity.

[0005] Furthermore, the piston cylinder is provided with an oil outlet passage, an oil storage chamber and a connecting through hole, the oil outlet passage, the piston chamber, the connecting through hole and the oil storage chamber are connected in sequence, an oil filling column is provided in the oil storage chamber, an oil filling hole is provided on the oil filling column, and the oil filling hole is connected with the oil storage chamber.

[0006] Furthermore, two piston assemblies are provided, and the piston chamber includes: a first piston chamber and a second piston chamber, the oil storage chamber is connected to the first piston chamber through a first through hole, and the oil storage chamber is connected to the second piston chamber through a second through hole, one of the piston assemblies is arranged in the first piston chamber, and the other piston assembly is arranged in the second piston chamber.

[0007] Furthermore, two partition parts are provided in the piston cylinder, one end of the two partition parts is connected to the inner wall of the oil storage chamber, and the other end of the two partition parts is connected to the oil filling column to divide the oil storage chamber into a first oil storage chamber and a second oil storage chamber, the first oil storage chamber is connected to the first piston chamber through the first through hole, and the second oil storage chamber is connected to the second piston chamber through the second through hole.

[0008] Further, a first blocking member and a second blocking member for blocking the first piston chamber are respectively provided at both ends of the first piston chamber, and a third blocking member and a fourth blocking member for blocking the second piston chamber are respectively provided at both ends of the second piston chamber;

[0009] The first blocking member and the third blocking member are both arranged at one end of the piston cylinder, the first blocking member passes through the third blocking member and is connected to the piston cylinder, the second blocking member and the fourth blocking member are both arranged at the other end of the piston cylinder, the fourth blocking member passes through the second blocking member and is connected to the piston cylinder.

[0010] Furthermore, it also includes: an oil outlet pipe connected to the oil outlet passage, the oil outlet pipe is connected to the piston cylinder, the handlebar includes a stem and a handlebar, the stem is connected to the handlebar, an installation cavity is provided in the stem, the accommodating cavity is provided in the handlebar, the installation cavity is connected to the accommodating cavity, the piston cylinder is installed at the connection between the stem and the handlebar, the oil outlet passage is provided in the oil outlet pipe, the oil outlet pipe is installed in the installation cavity, and the piston assembly is installed in the accommodating cavity.

[0011] Furthermore, a thick portion is extended from the outer surface of the piston cylinder, the oil outlet passage is arranged in the thick portion, and the oil outlet passage is connected to the thick portion.

[0012] Furthermore, an oil filling through hole is provided on the handlebar, and the oil filling through hole is provided corresponding to the oil filling hole.

[0013] Furthermore, it also includes: a mounting bracket and a mounting piece, the mounting bracket is mounted on the handlebar through the mounting piece, and the mounting bracket and the piston cylinder are integrated.

[0014] The embodiment of the utility model further provides a bicycle, comprising: the above-mentioned hidden hydraulic operating device.

[0015] The utility model discloses a hidden hydraulic operating device and a bicycle. The hidden hydraulic operating device is used to be installed in the handlebar of the bicycle, and includes: a piston assembly and a piston cylinder. The piston assembly includes a piston rod, a pull wire and a fixing piece. A piston cavity is provided in the piston cylinder, and the piston rod is movably installed in the piston cavity; the piston rod is connected to the fixing piece; one end of the pull wire passes through the piston cylinder, the piston cavity, the piston rod and the fixing piece in sequence and is connected to the fixing piece, and the other end of the pull wire is connected to the brake rod of the bicycle; a receiving cavity is provided on the handlebar, and the piston cylinder is installed in the receiving cavity. The utility model pulls the piston rod to move and then pushes the brake oil through the pull wire, changes part of the wire brake to the oil brake, shortens the length of the wire tube, reduces the friction between the pull wire and the sleeve, and thus improves the brake feel. At the same time, the hidden hydraulic operating device is installed in the handlebar, so that the hidden hydraulic operating device is integrated with the handlebar, and the wind resistance when the bicycle is riding is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the hidden hydraulic operating device installed on the handlebar;

[0018] Figure 2 It is a structural schematic diagram of a hidden hydraulic operating device;

[0019] Figure 3 It is an exploded view of the hidden hydraulic operating device;

[0020] Figure 4 It is a cross-sectional schematic diagram of a hidden hydraulic operating device from a first perspective;

[0021] Figure 5 is a cross-sectional schematic diagram of the hidden hydraulic operating device from a second viewing angle;

[0022] Figure 6 It is a structural schematic diagram of the piston cylinder from the first perspective;

[0023] Figure 7 is an exploded view of the second sealing member;

[0024] Figure 8 An exploded view of the piston cylinder, oil storage seal and oil storage cover;

[0025] Fig. 9 It is a schematic diagram of the structure of the handlebar;

[0026] Fig.10It is a partial schematic diagram of the hidden hydraulic operating device installed on the handlebar;

[0027] Fig.11 It is a structural schematic diagram of the piston cylinder from a second perspective;

[0028] Fig.12 is a schematic diagram of the structure of the fixing part;

[0029] Description of the markings in the figure:

[0030] 1. handlebar; 11. receiving cavity; 12. oil injection hole; 13. stem; 131. mounting cavity; 14. handlebar;

[0031] 2. Piston cylinder; 21. Piston chamber; 211. First piston chamber; 2111. First blocking member; 2112. Second blocking member; 21121. Blocking plate; 21122. Blocking block; 21123. Blocking hole; 212. Second piston chamber; 2121. Third blocking member; 2122. Fourth blocking member; 213. First through hole; 214. Second through hole; 22. Oil outlet passage; 23. Oil storage chamber; 231. Oil injection column; 2311. Oil injection hole; 232. First oil storage chamber; 233. Second oil storage chamber; 24. Connecting through hole; 25. Partitioning part; 26. Oil outlet pipe; 27. Thick part; 271. Positioning hole;

[0032] 3. Piston rod;

[0033] 4. Pull the wire;

[0034] 5. Fixing piece; 51. Fixing rod; 52. Fixing installation hole; 53. Fixing hole;

[0035] 6. Oil storage cap;

[0036] 7. Oil storage seal;

[0037] 8. Install the bracket;

[0038] 9. Mounting parts;

[0039] 10. Fine-tuning parts. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0042] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0043] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0044] See also Figure 1-4 The utility model provides a hidden hydraulic operating device, which is used to be installed in the handlebar 1 of a bicycle, including: a piston assembly and a piston cylinder 2, the piston assembly includes a piston rod 3, a pull wire 4 and a fixing piece 5, a piston cavity 21 is provided in the piston cylinder 2, and the piston rod 3 can be movably installed in the piston cavity 21; the piston rod 3 is connected to the fixing piece 5; one end of the pull wire 4 passes through the piston cylinder 2, the piston cavity 21, the piston rod 3 and the fixing piece 5 in sequence and is connected to the fixing piece 5, and the other end of the pull wire 4 is connected to the brake lever of the bicycle; an accommodating cavity 11 is provided on the handlebar 1, and the piston cylinder 2 is installed in the accommodating cavity 11.

[0045] In this embodiment, the piston rod 3 is pulled by the pull wire 4 to move and then push the hydraulic oil to achieve braking, and part of the wire brake is changed to an oil brake, which shortens the length of the wire tube and reduces the friction between the pull wire 4 and the sleeve, thereby improving the braking feel. At the same time, the hidden hydraulic operating device is installed in the handlebar 1, so that the hidden hydraulic operating device is integrated with the handlebar 1, thereby reducing the wind resistance when riding the bicycle.

[0046] In this embodiment, please refer to Figure 4-6 The piston cylinder 2 is provided with an oil outlet passage 22, an oil storage chamber 23 and a connecting through hole 24. The oil outlet passage 22, the piston chamber 21, the connecting through hole 24 and the oil storage chamber 23 are connected in sequence. An oil filling column 231 is provided in the oil storage chamber 23. An oil filling hole 2311 is provided on the oil filling column 231. The oil filling hole 2311 is connected to the oil storage chamber 23.

[0047] The provision of the oil injection column 231 can, on the one hand, provide a certain support to the oil storage cover 6 that encapsulates the oil storage chamber 23, thereby improving the pressure bearing capacity of the oil storage cover 6 for the hydraulic oil and improving the service life of the oil storage cover 6. On the other hand, it can reduce the damage to the structural strength of the piston cylinder 2 caused by the provision of the oil injection hole 2311 on the piston cylinder 2.

[0048] In order to achieve braking of the front and rear wheels, two brake structures need to be set up respectively to brake the front and rear wheels. One way is to set two hidden hydraulic operating devices, one hidden hydraulic operating device corresponds to the front wheel, and the other hidden hydraulic operating device corresponds to the rear wheel. Another way is to set two piston chambers 21 in the piston cylinder 2, and the two pistons are respectively installed in the two piston chambers 21, one of the piston chambers 21 is connected to the braking device on the front wheel to brake the front wheel, and the other piston chamber 21 is connected to the braking device on the rear wheel to brake the rear wheel.

[0049] In this embodiment, please refer to Figure 5 and Figure 6 There are two piston assemblies, and the piston chamber 21 includes: a first piston chamber 211 and a second piston chamber 212. The oil storage chamber 23 is connected to the first piston chamber 211 through a first through hole 213, and the oil storage chamber 23 is connected to the second piston chamber 212 through a second through hole 214. One piston assembly is arranged in the first piston chamber 211, and the other piston assembly is arranged in the second piston chamber 212.

[0050] Among them, the first piston chamber 211 and the second piston chamber 212 are respectively arranged corresponding to the front and rear wheels to brake the front and rear wheels. The first piston chamber 211 and the second piston chamber 212 are replenished with oil from the same oil storage chamber 23, which saves manufacturing costs; through the first through hole 213, the second through hole 214 and the oil filling hole 2311 connected with the oil storage chamber 23, the hydraulic oil is quickly transferred between the various components, shortening the braking response time.

[0051] Specifically, two partitions 25 are provided in the piston cylinder 2 (such as Figure 6 As shown in the figure, one end of the two partition parts 25 is connected to the inner wall of the oil storage chamber 23, and the other end of the two partition parts 25 is connected to the oil filling column 231 to divide the oil storage chamber 23 into a first oil storage chamber 232 and a second oil storage chamber 233. The first oil storage chamber 232 is connected to the first piston chamber 211 through the first through hole 213, and the second oil storage chamber 233 is connected to the second piston chamber 212 through the second through hole 214.

[0052] In this embodiment, the oil storage chamber 23 is divided into a first oil storage chamber 232 and a second oil storage chamber 233 by two partition portions 25 and an oil filling column 231. Compared with the structure in which one partition portion 25 divides the first oil storage chamber 232 and the second oil storage chamber 233, the setting of the oil filling column 231 can shorten the length of the two partition portions 25, thereby reducing the bearing torque of the two partition portions 25, and further improving the bearing capacity of the entire structure of the two partition portions 25 and the oil filling column 231.

[0053] In this embodiment, please refer to Figure 2 and Figure 3 A first blocking member 2111 and a second blocking member 2112 for blocking the first piston chamber 211 are respectively disposed at both ends of the first piston chamber 211 , and a third blocking member 2121 and a fourth blocking member 2122 for blocking the second piston chamber 212 are respectively disposed at both ends of the second piston chamber 212 .

[0054] The design of the four blocking pieces can not only prevent the piston assembly from slipping inside the piston cylinder 2, but also prevent foreign matter from entering the piston cylinder 2, thereby ensuring the normal operation and long-term stability of the piston assembly.

[0055] Specifically, the first blocking member 2111 and the third blocking member 2121 are both arranged at one end of the piston cylinder 2, the first blocking member 2111 passes through the third blocking member 2121 and is connected to the piston cylinder 2, the second blocking member 2112 and the fourth blocking member 2122 are both arranged at the other end of the piston cylinder 2, the fourth blocking member 2122 passes through the second blocking member 2112 and is connected to the piston cylinder 2.

[0056] The first blocking member 2111 and the third blocking member 2121 are integrated at one end of the piston cylinder 2, and the second blocking member 2112 and the fourth blocking member 2122 are integrated at the other end. This design makes the structure of the piston cylinder 2 more compact, reduces the overall size, and is convenient for installation and use in a limited space. The third blocking member 2121 is installed on the piston cylinder 2 through the first blocking member 2111, and the second blocking member 2112 is installed on the piston cylinder 2 through the fourth blocking member 2122. This installation method not only ensures a firm connection between the blocking member and the piston cylinder 2, but also makes the replacement and maintenance of the blocking member more convenient. When repair or replacement is needed, the user can quickly disassemble and replace the corresponding blocking member, thereby reducing downtime and maintenance costs.

[0057] For further information, see Figure 7The second blocking member 2112 includes: a blocking plate 21121 and a blocking block 21122. The blocking plate 21121 is provided with two blocking holes 21123. The fourth blocking member 2122 passes through one of the blocking holes 21123 and is connected to the piston cylinder 2 to install the second blocking member 2112 on the piston cylinder 2. The blocking block 21122 is installed on the other blocking hole 21123. The blocking block 21122 is arranged corresponding to the first piston chamber 211 to block the first piston chamber 211.

[0058] The second blocking member 2112 combines the design of the blocking plate 21121 and the blocking block 21122, so that the structure can be installed on the piston cylinder 2 and can effectively block the first piston chamber 211. This design integrates multiple functions into one component, improving the flexibility of the structure and the diversity of functions.

[0059] It should be noted that the third blocking member 2121 can adopt the same structural design as the second blocking member 2112, and the first blocking member 2111 and the fourth blocking member 2122 can adopt the same structural design. This standardized design makes the production, installation and maintenance process more unified and efficient, reduces the differences between different components, and reduces production complexity and cost.

[0060] In this embodiment, please refer to Figure 8 , and also includes: an oil storage seal 7 and an oil storage cover 6, the oil storage seal 7 is arranged between the oil storage cover 6 and the oil storage chamber 23, and the oil storage cover 6 is connected to the piston cylinder 2.

[0061] The oil storage seal 7 is arranged between the oil storage cover 6 and the oil storage chamber 23, which ensures the sealing of the oil storage chamber 23. The oil storage seal 7 can effectively prevent the leakage of hydraulic oil and ensure the stable operation of the device. The oil storage cover 6 not only provides physical protection for the oil storage chamber 23, but also further enhances this protection by combining with the oil storage seal 7. The oil storage cover 6 can also prevent dust, dirt and other contaminants from entering the oil storage chamber 23, thereby maintaining the cleanliness of the hydraulic oil and the performance of the device.

[0062] In this embodiment, the handlebar 1 is provided with an oil injection hole 12 (such as Fig. 9 As shown), the oil injection through hole 12 is arranged corresponding to the oil injection hole 2311.

[0063] By providing the oil filling through hole 12 on the handlebar 1 , the user can more conveniently refill the oil storage chamber 23 .

[0064] In this embodiment, please refer to Fig.10 and Fig.11, and also includes: an oil outlet pipe 26 connected to the oil outlet passage 22, the oil outlet pipe 26 is connected to the piston cylinder 2, the handlebar 1 includes a stem 13 and a handlebar 14, the stem 13 is connected to the handlebar 14, an installation cavity 131 is provided in the stem 13, the accommodating cavity 11 is provided in the handlebar 14, the installation cavity 131 is connected to the accommodating cavity 11, the piston cylinder 2 is installed at the connection between the stem 13 and the handlebar 14, the oil outlet passage 22 is provided in the oil outlet pipe 26, the oil outlet pipe 26 is installed in the installation cavity 131, and the piston assembly is installed in the accommodating cavity 11.

[0065] This embodiment realizes a fully internal routing design for the pull cable by installing the piston assembly in the accommodating cavity 11, and by installing the oil outlet pipe 26 in the installation cavity 131, the oil pipe connected to the oil outlet pipe 26 can extend from the inside of the stem 13 to the frame, thereby realizing a fully internal routing design for the oil pipe. The fully internal routing design for the pull cable and the oil pipe improves the overall appearance of the bicycle, while also reducing the wind resistance during riding and improving riding efficiency.

[0066] When two piston assemblies are provided, both piston assemblies are provided in the accommodating chamber 11, and the two piston assemblies are arranged back to back, the pull wire in one piston assembly extends toward the left side and is connected to the brake rod on the left side, and the pull wire in the other piston assembly extends toward the right side and is connected to the brake rod on the right side, and two oil outlet pipes 26 are provided accordingly, and the two oil outlet pipes 26 are connected to the first piston chamber 211 and the second piston chamber 212 through two oil outlet passages 22 respectively.

[0067] In this embodiment, a thick portion 27 (such as Fig.11 As shown in FIG. 2 , the oil outlet passage 22 is arranged in the thick portion 27 , and the oil outlet passage 26 is connected to the thick portion 27 .

[0068] The thick portion 27 increases the strength of the local structure of the piston cylinder 2 and improves the stability of the piston cylinder 2 when it is subjected to pressure, vibration and impact.

[0069] Furthermore, a plurality of positioning holes 271 are provided on the thick portion 27, and a plurality of positioning parts (not shown in the figure) are correspondingly provided on the handlebar 1. When the positioning parts are inserted into the corresponding positioning holes 271, the tight fit between the positioning holes 271 and the positioning parts can ensure that the connection between the handlebar 1 and the piston cylinder 2 is firm and reliable, not easy to loosen, and can remain stable even under bumpy road conditions.

[0070] In order to further improve the convenience of oil filling, the oil filling hole 2311 is arranged above the oil storage chamber 23, the oil filling through hole 12 is arranged above the oil filling hole 2311, and the oil filling through hole 12 is arranged at the top of the handlebar 1. Since the oil filling through hole 12 is arranged at the top of the handlebar 1, the user can intuitively see the oil filling position without having to find the oil filling position, and since the oil filling hole 2311 is located above the oil storage chamber 23, and the oil filling through hole 12 is further located above the oil filling hole 2311, this layout can effectively prevent the hydraulic oil from overflowing during the oil filling process. The hydraulic oil will naturally flow to the oil storage chamber 23 under the action of gravity, avoiding the hydraulic oil from splashing or leaking during the oil filling process, and keeping the operating environment clean.

[0071] In this embodiment, it also includes: a mounting bracket 8 and a mounting member 9 (such as Figure 2 As shown), the mounting bracket 8 is mounted on the handlebar 1 through the mounting member 9, and the mounting bracket 8 and the piston cylinder 2 are integrated.

[0072] Since the mounting bracket 8 is integrated with the piston cylinder 2, it is only necessary to fix the entire structure to the handlebar 1 during installation, which greatly reduces the number of installation steps and time. The integrated design reduces the number of interfaces and connection points between the mounting bracket 8 and the piston cylinder 2, thereby reducing the risk of failure caused by poor connection or looseness.

[0073] See also Figure 3 and Fig.12 The fixing member 5 is provided with a fixing rod 51, a fixing mounting hole 52 and a fixing hole 53 connected to the fixing mounting hole 52. The pull wire 4 is installed in the fixing mounting hole 52. The fixing rod 51 is installed in the fixing hole 53 to press the pull wire 4 against the inner wall of the fixing mounting hole 52. Specifically, the fixing rod 51 can be a screw. The fixing mounting hole 52 is provided with a thread. The fixing rod 51 is threadedly connected to the fixing mounting hole 52.

[0074] The fixing member 5 is provided with a fixing installation hole 52 and a fixing hole 53, so that the installation of the cable 4 and the fixing rod 51 becomes simple and easy. The operator only needs to pass the cable 4 through the fixing installation hole 52, and then install the fixing rod 51 in the fixing hole 53 to fix the cable 4. This design reduces the installation steps and complexity, and improves work efficiency; the design of the fixing rod 51 and the fixing hole 53 also effectively prevents the cable 4 from loosening or shifting during use, thereby ensuring the reliability and stability of the brake system; in addition, the user can loosen the fixing rod 51, and then pull the cable 4 to achieve a rough adjustment of the brake stroke.

[0075] Furthermore, in order to achieve accurate adjustment of the brake stroke, the present embodiment further comprises: a fine-tuning member 10 (such as Figure 2 and Figure 3As shown), the fine-tuning member 10 is disposed between the piston cylinder 2 and the fixing member 5, one end of the fine-tuning member 10 is connected to the piston rod 3, and the other end of the fine-tuning member 10 is adjustably connected to the fixing member 5 to adjust the distance between the end of the piston chamber 21 away from the fixing member 5 and the fixing member 5;

[0076] Alternatively, one end of the fine-tuning member 10 is adjustably connected to the piston rod 3 to adjust the distance between the end of the piston chamber 21 away from the fixing member 5 and the fixing member 5, and the other end of the fine-tuning member 10 is connected to the fixing member 5;

[0077] Alternatively, one end of the fine-tuning member 10 is adjustably connected to the piston rod 3 , and the other end of the fine-tuning member 10 is adjustably connected to the fixing member 5 , so as to adjust the distance between the fixing member 5 and the end of the piston chamber 21 away from the fixing member 5 .

[0078] In this embodiment, by providing a fine-tuning member 10, the user only needs to adjust the fine-tuning member 10 to adjust the distance between the end of the piston chamber 21 away from the fixing member 5 and the fixing member 5, thereby achieving precise adjustment of the braking stroke. No special maintenance tools are required, the adjustment method is simple and convenient, and the user experience is significantly improved.

[0079] Specifically, when the other end of the fine-tuning member 10 is adjustably connected to the fixing member 5, the outer surface of the other end of the fine-tuning member 10 is provided with an external thread, and the fixing member 5 is provided with an internal thread; or, the other end of the fine-tuning member 10 is provided with an internal thread, and the fixing member 5 is provided with an external thread;

[0080] Wherein, the external thread is threadedly connected with the internal thread.

[0081] When one end of the fine-tuning member 10 is adjustably connected to the piston rod 3, one end of the fine-tuning member 10 is provided with an external thread, and the piston rod 3 is provided with an internal thread; or one end of the fine-tuning member 10 is provided with an internal thread, and the piston rod 3 is provided with an external thread;

[0082] Wherein, the external thread is threadedly connected with the internal thread.

[0083] The fine-tuning member 10 is connected to the fixing member 5 or the piston rod 3 by threads, so that the user can make fine adjustments very conveniently and accurately. By simply rotating the fine-tuning member 10, the distance between the fine-tuning member 10 and the fixing member 5 or the fine-tuning member 10 and the piston rod 3 can be adjusted, thereby achieving accurate adjustment of the brake stroke; in addition, the threaded connection has high stability. Once the fine-tuning member 10 is tightly connected to the fixing member 5 or the piston rod 3, it is not easy to loosen or fall off, ensuring the stability and reliability of the entire structure.

[0084] This embodiment also provides a bicycle, comprising: the hidden hydraulic operating device of the above embodiment.

[0085] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0086] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive.

[0087] Inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "including a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A concealed hydraulic operating device for installation in the handlebar of a bicycle, characterized in that: include: A piston assembly and a piston cylinder, wherein the piston assembly includes a piston rod, a pull wire and a fixing part; a piston cavity is provided in the piston cylinder, and the piston rod is movably installed in the piston cavity; the piston rod is connected to the fixing part; one end of the pull wire passes through the piston cylinder, the piston cavity, the piston rod and the fixing part in sequence and is connected to the fixing part, and the other end of the pull wire is connected to the brake lever of the bicycle; an accommodating cavity is provided on the handlebar, and the piston cylinder is installed in the accommodating cavity.

2. The hidden hydraulic operating device according to claim 1, characterized in that: The piston cylinder is provided with an oil outlet passage, an oil storage chamber and a connecting through hole. The oil outlet passage, the piston chamber, the connecting through hole and the oil storage chamber are connected in sequence. An oil filling column is provided in the oil storage chamber. An oil filling hole is provided on the oil filling column. The oil filling hole is connected with the oil storage chamber.

3. The hidden hydraulic operating device according to claim 2, characterized in that: The piston assemblies are provided with two, and the piston chamber includes: a first piston chamber and a second piston chamber, the oil storage chamber is connected with the first piston chamber through a first through hole, and the oil storage chamber is connected with the second piston chamber through a second through hole, one of the piston assemblies is arranged in the first piston chamber, and the other piston assembly is arranged in the second piston chamber.

4. The hidden hydraulic operating device according to claim 3, characterized in that: Two partition parts are arranged in the piston cylinder, one end of the two partition parts is connected to the inner wall of the oil storage chamber, and the other end of the two partition parts is connected to the oil filling column to divide the oil storage chamber into a first oil storage chamber and a second oil storage chamber, the first oil storage chamber is connected to the first piston chamber through the first through hole, and the second oil storage chamber is connected to the second piston chamber through the second through hole.

5. The hidden hydraulic operating device according to claim 3, characterized in that: A first blocking member and a second blocking member for blocking the first piston chamber are respectively provided at both ends of the first piston chamber, and a third blocking member and a fourth blocking member for blocking the second piston chamber are respectively provided at both ends of the second piston chamber; The first blocking member and the third blocking member are both arranged at one end of the piston cylinder, the first blocking member passes through the third blocking member and is connected to the piston cylinder, the second blocking member and the fourth blocking member are both arranged at the other end of the piston cylinder, the fourth blocking member passes through the second blocking member and is connected to the piston cylinder.

6. The hidden hydraulic operating device according to claim 2, characterized in that: Also includes: An oil outlet pipe connected to the oil outlet passage, the oil outlet pipe is connected to the piston cylinder, the handlebar includes a stem and a handlebar, the stem is connected to the handlebar, a mounting cavity is provided in the stem, the accommodating cavity is provided in the handlebar, the mounting cavity is connected to the accommodating cavity, the piston cylinder is installed at the connection between the stem and the handlebar, the oil outlet passage is provided in the oil outlet pipe, the oil outlet pipe is installed in the mounting cavity, and the piston assembly is installed in the accommodating cavity.

7. The hidden hydraulic operating device according to claim 6, characterized in that: A thick portion is extended from the outer surface of the piston cylinder, the oil outlet passage is arranged in the thick portion, and the oil outlet passage is connected to the thick portion.

8. The hidden hydraulic operating device according to claim 2, characterized in that: The handlebar is provided with an oil injection through hole, and the oil injection through hole is arranged corresponding to the oil injection hole.

9. The hidden hydraulic operating device according to claim 1, characterized in that: Also includes: A mounting bracket and a mounting piece, wherein the mounting bracket is mounted on the handlebar via the mounting piece, and the mounting bracket and the piston cylinder are integrated.

10. A bicycle, characterized in that: include: A concealed hydraulic operating device as described in any one of claims 1 to 9.

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