Bicycle hand change

Abstract

The utility model discloses a bicycle hand transformer. An oil storage cavity, an installation cavity and an oil outlet channel are formed in a hand transformer body. The hydraulic cylinder shell is formed in the mounting cavity, a penetrating cavity is formed in the hydraulic cylinder shell, the piston rod is mounted in the penetrating cavity, a hydraulic cavity is formed between the hydraulic cylinder shell and the piston rod in a sealing and surrounding manner, the hydraulic cavity is communicated with the oil storage cavity, and the inlet end of the oil outlet passage is communicated with the hydraulic cavity; in the process that the end part of the force application handle rotates relative to the hand change main body, the piston rod is driven to reciprocate along the penetrating cavity; in the process that the piston rod moves in the direction close to the inlet end of the oil outlet channel along the axis of the penetrating cavity, the piston rod pushes hydraulic oil to enter the oil outlet channel from the hydraulic cavity. In the process that the piston rod moves in the direction away from the inlet end of the oil outlet channel along the axis of the penetrating cavity, hydraulic oil enters the hydraulic cavity from the oil outlet channel. The utility model aims to solve the problems of heavy whole machine weight, insufficient storage space, low utilization rate of an oil storage cavity and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of bicycles, and in particular relates to a bicycle hand shift. Background Art

[0002] In recent years, high-configuration bicycles often use hydraulic brake systems, such as hydraulic disc brake systems or hydraulic shoe brakes, etc. The hydraulic brake system is usually connected to the brake lever at the handlebar of the bicycle for braking. In the prior art, the hydraulic brake system is connected to one side of the brake lever as a separate module, with a large number of parts, a large weight of the whole machine, and a large space occupied by the whole machine, and insufficient storage space for hydraulic oil.

[0003] Therefore, developing a bicycle hand shift that integrates a hydraulic brake system in the hand shift, fully utilizing the space in the hand shift and increasing the volume of the oil storage cavity without affecting the appearance and overall weight, is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The utility model aims to provide a bicycle hand shift to solve the problems existing in the prior art that the hydraulic brake system is connected to one side of the brake rod, the whole machine is heavy, occupies a large space, and has insufficient storage space.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a bicycle hand shift, comprising:

[0007] A hand-shift body, in which an oil storage cavity, a mounting cavity and an oil outlet passage are formed, and the oil outlet passage is used to communicate with a brake component;

[0008] A hydraulic cylinder housing is formed in the mounting cavity, and a through cavity is formed in the hydraulic cylinder housing;

[0009] A piston rod is installed in the through cavity, a hydraulic cavity is formed by sealing between the hydraulic cylinder housing and the piston rod, the hydraulic cavity is communicated with the oil storage cavity, the oil storage cavity is located above the hydraulic cavity, the oil storage tank is projected toward the hydraulic cavity, and the hydraulic cavity is partially or completely located in the projection of the oil storage cavity; the inlet end of the oil outlet passage is communicated with the hydraulic cavity; the oil outlet passage is located above the hydraulic cavity;

[0010] A force applying handle, one end of which is rotatably connected to the hand-shift body, and when the end of the force applying handle rotates relative to the hand-shift body, the piston rod is driven to reciprocate along the through cavity;

[0011] When the piston rod moves along the axis of the through cavity toward the inlet end of the oil outlet passage, the piston rod pushes the hydraulic oil from the hydraulic cavity into the oil outlet passage;

[0012] When the piston rod moves along the axis of the through-cavity toward a direction away from the inlet end of the oil outlet passage, the hydraulic oil enters the hydraulic cavity from the oil outlet passage.

[0013] In some embodiments of the present application, when the amount of hydraulic oil required in the oil outlet passage to ensure the initial position of the brake component increases, the hydraulic oil is replenished from the oil storage chamber through the hydraulic chamber into the oil outlet passage.

[0014] In some embodiments of the present application, when the amount of hydraulic oil required to ensure the initial position of the brake component in the oil outlet passage increases, during the process of the piston rod moving along the axis of the through cavity toward the direction close to the inlet end of the oil outlet passage, the piston rod pushes the hydraulic oil into the oil storage chamber; during the process of the piston rod moving along the axis of the through cavity toward the direction away from the inlet end of the oil outlet passage, part of the hydraulic oil flows back from the oil outlet passage into the hydraulic chamber, and the hydraulic oil flows from the oil storage chamber into the hydraulic chamber for replenishment.

[0015] In some embodiments of the present application, a first sealing component and a second sealing component are spaced apart along the axis of the piston rod, and the first sealing component and the second sealing component are both arranged around the piston rod; the outer ends of the first sealing component and the second sealing component abut against the through-cavity to form a hydraulic balance cavity, and the hydraulic balance cavity is filled with hydraulic oil; the hydraulic cavity is formed between the first sealing component and the through-cavity.

[0016] In some embodiments of the present application, a first connecting hole and a second connecting hole are provided on the hydraulic cylinder housing, one end of the first connecting hole is located at the bottom of the oil storage chamber, and the other end of the first connecting hole is located at the top of the hydraulic chamber; the first connecting hole is used to communicate with the oil storage chamber and the hydraulic chamber.

[0017] In some embodiments of the present application, the first connecting hole is opened on the hydraulic cylinder housing at the side of the inlet end of the oil outlet passage near the first sealing component; the two ends of the second connecting hole are respectively used to communicate with the oil storage chamber and the hydraulic balance chamber; the cross-sectional area of ​​the first connecting hole is smaller than the cross-sectional area of ​​the second connecting hole.

[0018] In some embodiments of the present application, the manual shift body includes a manual shift body and an oil storage chamber sealing assembly; the oil storage chamber is formed on the manual shift body, and an oil storage chamber opening is formed on the manual shift body, and the oil storage chamber sealing assembly is used for constant pressure elastic sealing of the oil storage chamber opening.

[0019] In some embodiments of the present application, the oil storage chamber sealing assembly includes an elastic oil bag, which is installed at the opening of the oil storage chamber; the elastic oil bag is used to ensure that the pressure inside the oil storage chamber and outside the elastic oil bag is equal through elastic deformation.

[0020] In some embodiments of the present application, the oil storage chamber sealing assembly also includes an oil storage chamber upper cover, which is installed outside the elastic oil bag. An oil filling port is opened on the hand change body, and the oil filling port screw passes through the oil filling port to achieve sealing of the oil storage chamber.

[0021] In some embodiments of the present application, a connecting hole is provided on the oil storage chamber upper cover, and a fastener connects the oil storage chamber upper cover to the hand shift body through the connecting hole.

[0022] Compared with the prior art, the advantages and positive effects of the utility model are:

[0023] By opening an installation cavity, the hydraulic cylinder housing and the piston rod are installed in the installation cavity, so there is no need to connect a hydraulic device separately outside the hand shift. The hydraulic cylinder housing and the piston rod directly use the hand shift housing as the main body, thereby reducing the volume and weight of the overall equipment and saving space;

[0024] By forming a hydraulic cavity between the piston rod and the through cavity, an oil storage cavity and an oil outlet passage are formed in the hand-shift body, and the oil storage cavity and the oil outlet passage are both arranged on the hydraulic cavity. When the piston rod moves relative to the through cavity in a direction close to the inlet end of the oil outlet passage, the hydraulic oil flows out from the hydraulic cavity into the oil outlet passage; when the piston rod moves relative to the through cavity in a direction away from the inlet end of the oil outlet passage, the hydraulic oil flows back from the oil outlet passage into the hydraulic cavity.

[0025] By arranging the hydraulic chamber below the oil storage chamber, the hydraulic oil flows out of the oil storage chamber into the hydraulic chamber. When the hydraulic oil in the hydraulic chamber needs to be replenished, the hydraulic oil in the oil storage chamber can automatically replenish the hydraulic chamber, and can automatically flow by gravity to avoid the formation of air in the hydraulic chamber.

[0026] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a bicycle hand shift proposed by the utility model;

[0029] Figure 2 yes Figure 1 A cross-sectional view of

[0030] Figure 3 It is a cross-sectional view of an embodiment of a hydraulic chamber and an oil outlet passage of a bicycle hand shift proposed by the utility model;

[0031] Figure 4 It is a schematic diagram of the overall structure of another embodiment of a bicycle hand shift proposed by the utility model;

[0032] Figure 5 yes Figure 4 A cross-sectional view of

[0033] Figure 6 It is a cross-sectional view of another embodiment of a hydraulic chamber and an oil outlet passage of a bicycle hand shift proposed by the utility model;

[0034] In the figure,

[0035] 110, oil storage chamber;

[0036] 111, opening of the oil storage chamber;

[0037] 120, mounting cavity;

[0038] 130, oil outlet passage;

[0039] 140, hand becomes subject;

[0040] 141, oil filling port;

[0041] 142, fasteners;

[0042] 150, oil storage chamber sealing assembly;

[0043] 151, elastic oil bladder;

[0044] 1511, bulge;

[0045] 152, oil storage chamber upper cover;

[0046] 1521, connection hole;

[0047] 1522, oil filling port screw;

[0048] 200, hydraulic cylinder housing;

[0049] 210, through cavity;

[0050] 220, second communication hole;

[0051] 230, a first communication hole;

[0052] 300, piston rod;

[0053] 310, a first sealing component;

[0054] 320, a second sealing member;

[0055] 330, hydraulic balance chamber;

[0056] 400, hydraulic chamber;

[0057] 500, force handle. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0064] In some embodiments of the present application, a bicycle hand shift is provided, which includes a hand shift body, in which a hydraulic brake system is integrated.

[0065] In some embodiments of the present application, an oil storage cavity 110 , a mounting cavity 120 and an oil outlet passage 130 are formed in the hand shift body.

[0066] A hydraulic brake system is formed within the mounting cavity 120 .

[0067] The oil storage chamber 110 is in communication with the installation chamber 120. The oil storage chamber 110 is in communication with the installation chamber 120 to deliver hydraulic oil to the hydraulic brake system.

[0068] The oil outlet passage 130 is in communication with the installation chamber 120 . The hydraulic brake system outputs hydraulic oil to the oil outlet passage 130 through the installation chamber 120 .

[0069] The oil outlet passage 130 is used to communicate with the brake component.

[0070] In some embodiments of the present application, the hydraulic brake system includes a hydraulic cylinder housing 200 and a piston rod 300 .

[0071] The hydraulic cylinder housing 200 is formed in the mounting cavity 120 .

[0072] Specifically, the hydraulic cylinder housing 200 and the hand shift body may be formed in one piece.

[0073] A through cavity 210 is formed in the cylinder housing 200 .

[0074] The piston rod 300 is installed in the through cavity 210 .

[0075] The piston rod 300 may be extended along the axial direction of the through cavity 210 .

[0076] The piston rod 300 is installed in the through cavity 210 and is sealed with the inner wall of the through cavity 210 to form a hydraulic cavity 400 .

[0077] The oil storage chamber 110 is communicated with the hydraulic chamber 400 .

[0078] The oil outlet passage 130 is in communication with the hydraulic chamber 400 .

[0079] Specifically, the end of the oil outlet passage 130 communicating with the hydraulic chamber 400 is the inlet end of the oil outlet passage 130 .

[0080] The outlet end of the oil outlet passage 130 is in communication with the brake component for providing hydraulic power to the brake component.

[0081] In some embodiments of the present application, in order to facilitate the replenishment of the hydraulic oil in the oil storage chamber 110 into the hydraulic chamber 400 , the oil storage chamber 110 is located above the hydraulic chamber 400 .

[0082] The oil storage chamber 110 is projected toward the hydraulic chamber 400 , and the hydraulic chamber 400 is partially or entirely located within the projection of the oil storage chamber 110 .

[0083] In some embodiments of the present application, Figure 1 , Figure 2 , Figure 3 As shown, the oil storage chamber 110 may be located directly above the hydraulic chamber 400 .

[0084] In some other embodiments of the present application, Figure 4 , Figure 5 , Figure 6 As shown, the oil storage chamber 110 may be located above and to the side of the hydraulic chamber 400 .

[0085] The hydraulic oil is distributed at the bottom of the oil storage chamber 110 due to gravity. If there is gas in the oil storage chamber 110, the gas will be distributed at the upper part of the oil storage chamber 110. Since the oil storage chamber 110 is located directly above or above the hydraulic chamber 400, the part of the oil storage chamber 110 filled with hydraulic oil is connected to the hydraulic chamber 400, so that it can be ensured that the hydraulic chamber 400 contains hydraulic oil, and gas can be prevented from entering the hydraulic chamber 400, thereby realizing automatic replenishment of the hydraulic oil.

[0086] The hydraulic oil is applied to the brake components through the oil outlet passage 130 to drive the brake disc for braking. Since the oil outlet passage 130 is located above the hydraulic chamber 400, the hydraulic oil cannot automatically enter the oil outlet passage 130.

[0087] The piston rod 300 moves relative to the hydraulic cylinder housing 200 toward the inlet end of the oil outlet passage 130 , thereby pushing the hydraulic oil from the hydraulic chamber 400 into and out of the oil outlet passage 130 , thereby performing a braking action.

[0088] When the piston rod 300 moves relative to the hydraulic cylinder housing 200 toward the side away from the inlet end of the oil outlet passage 130 , the volume of the hydraulic chamber 400 increases, and the hydraulic oil enters the hydraulic chamber 400 from the oil outlet passage 130 due to the effect of pressure.

[0089] When the brake components are worn, in order to ensure the braking stroke, a portion of hydraulic oil needs to be added to ensure that the brake components are at a new initial position. At this time, the hydraulic oil in the oil outlet passage 130 increases, so the hydraulic oil is automatically added from the oil storage chamber 110 to the hydraulic chamber 400 due to the pressure.

[0090] The wear of the brake components is accumulated over time, so the hydraulic oil is automatically replenished from the oil storage chamber 110 to the hydraulic chamber 400 to maintain the balance of the brake components when they are in the initial position.

[0091] That is, when the amount of hydraulic oil in the oil outlet passage 130 for ensuring the initial position of the brake component increases, the hydraulic oil is replenished from the oil storage chamber 110 to the hydraulic chamber 400. The hydraulic oil is replenished from the hydraulic chamber 400 to the oil outlet passage 130.

[0092] In some embodiments of the present application, when the amount of hydraulic oil required to ensure the initial position of the brake component in the oil outlet passage 130 increases, the piston rod 300 pushes the hydraulic oil into the oil outlet passage 130 as the piston rod 300 moves along the axis of the through cavity 210 toward the inlet end of the oil outlet passage 130.

[0093] When the brake components are worn, in order to ensure the braking stroke, a part of the hydraulic oil needs to be supplemented to ensure that the brake components are in the new initial position. At this time, the oil storage chamber 110 needs to supplement the hydraulic chamber 400 with oil, and the hydraulic chamber 400 needs to supplement the oil outlet passage 130 with oil. During the process of the piston rod 300 moving along the axis of the through-chamber 210 toward the direction away from the inlet end of the oil outlet passage 130, part of the hydraulic oil flows back from the oil outlet passage 130 to the hydraulic chamber 400, and the hydraulic oil flows from the oil storage chamber 110 to the hydraulic chamber 400 for supplement.

[0094] In some embodiments of the present application, in order to ensure that the piston rod 300 can be pulled smoothly during the movement along the through cavity 210 and to avoid the problem that the piston rod 300 cannot be pulled out due to pressure imbalance in the through cavity 210, a first sealing component 310 and a second sealing component 320 are arranged at intervals along the axial direction of the piston rod 300.

[0095] Specifically, the first sealing component 310 is disposed around the middle of the piston rod 300 , and the second sealing component 320 is disposed around the end of the piston rod 300 .

[0096] The outer ends of the first sealing component 310 and the second sealing component 320 are both in contact with the through cavity 210 , so a hydraulic balance cavity 330 is formed by the first sealing component 310 , the second sealing component 320 , the piston rod 300 and the hydraulic cylinder housing 200 .

[0097] The first sealing member 310 and the through cavity 210 surround and form a hydraulic cavity 400 .

[0098] The hydraulic balance chamber 330 and the hydraulic chamber 400 are both filled with hydraulic oil.

[0099] Since the hydraulic chamber 400 and the hydraulic balance chamber 330 are both filled with hydraulic oil, the piston rod 300 can be freely pulled in the through chamber 210 .

[0100] In some embodiments of the present application, in order to connect the oil storage chamber 110 with the hydraulic chamber 400 , a first communication hole 230 is opened on the hydraulic cylinder housing 200 .

[0101] Both ends of the first communication hole 230 are used to communicate with the oil storage chamber 110 and the hydraulic chamber 400 respectively.

[0102] In some embodiments of the present application, in order to connect the oil storage chamber 110 with the hydraulic balance chamber 330 , a second communication hole 220 is opened on the hydraulic cylinder housing 200 .

[0103] Two ends of the second communication hole 220 are respectively used to communicate with the oil storage chamber 110 and the hydraulic balance chamber 330 .

[0104] Specifically, the first communication hole 230 is opened at one side of the first sealing member 310 close to the inlet end of the oil outlet passage 130 .

[0105] Specifically, the first communication hole 230 is provided on the hydraulic cylinder housing 200 adjacent to the first sealing component 310 .

[0106] During the process of the piston rod 300 moving relative to the through cavity 210 toward the inlet end of the oil outlet passage 130, it can move to the first connecting hole 230 as quickly as possible to close it, and then connect the first connecting hole 230 with the hydraulic balance cavity 330, thereby shortening the time for the first connecting hole 230 to connect with the hydraulic cavity 400, and avoiding pushing the hydraulic oil into the oil storage cavity 110 during the process of the piston rod 300 moving toward the inlet end near the oil outlet passage 130.

[0107] In some embodiments of the present application, the manual shift body includes a manual shift body 140 and an oil storage chamber sealing assembly 150 .

[0108] The oil storage cavity 110 , the mounting cavity 120 and the oil outlet passage 130 are all formed in the hand shift body 140 .

[0109] In some embodiments of the present application, the oil storage cavity 110 is formed with an oil storage cavity opening 111 on the hand-shift body 140. The oil storage cavity sealing assembly 150 is used for sealing at the oil storage cavity opening 111.

[0110] In some embodiments of the present application, the oil storage chamber sealing assembly 150 includes an elastic oil bag 151 .

[0111] The elastic oil bag 151 is installed at the oil storage cavity opening 111. The elastic oil bag 151 is used to ensure that the pressure inside the oil storage cavity 110 and outside the elastic oil bag 151 is equal through elastic deformation.

[0112] Specifically, the elastic oil bag 151 is a component made of elastic material.

[0113] A protrusion 1511 is formed on the elastic oil bag 151 .

[0114] The protruding portion 1511 protrudes into the hand shift body 140 , and is surrounded by the hand shift body 140 to form an oil storage chamber 110 .

[0115] In some embodiments of the present application, the oil storage chamber sealing assembly 150 further includes an oil storage chamber upper cover 152 . The oil storage chamber upper cover 152 is installed outside the elastic oil bag 151 .

[0116] Specifically, an oil filling port 141 is provided on the hand-shift body 140. The oil filling port 141 is sealed by an oil filling port screw 1522. The oil filling port screw 1522 is detachably connected to the oil filling port 141.

[0117] Specifically, a connecting hole 1521 is opened on the oil storage chamber upper cover 152 , and the fastener 142 connects the oil storage chamber upper cover 152 and the hand shift body 140 through the connecting hole 1521 .

[0118] In some embodiments of the present application, one end of the force applying handle 500 is rotatably connected to the hand-shift body 140. When the end of the force applying handle 500 rotates relative to the hand-shift body, the piston rod 300 is driven to reciprocate relative to the through cavity 210.

[0119] In some embodiments of the present application, the oil storage chamber 110 is directly connected to the hydraulic chamber 400, eliminating the transition oil storage chamber, reducing the sealing structure, reducing the processing difficulty, improving the utilization rate of the oil storage chamber, and effectively avoiding air trapping in the oil storage chamber.

[0120] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0121] The above is only a specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A bicycle hand lever, characterized in that: include: A hand-shift body, in which an oil storage cavity, a mounting cavity and an oil outlet passage are formed, and the oil outlet passage is used to communicate with a brake component; A hydraulic cylinder housing is formed in the mounting cavity, and a through cavity is formed in the hydraulic cylinder housing; A piston rod is installed in the through cavity, a hydraulic cavity is formed by sealing between the hydraulic cylinder housing and the piston rod, the hydraulic cavity is communicated with the oil storage cavity, the oil storage cavity is located above the hydraulic cavity, the oil storage cavity is projected toward the direction of the hydraulic cavity, and the hydraulic cavity is partially or completely located in the projection of the oil storage cavity; the inlet end of the oil outlet passage is communicated with the hydraulic cavity; the oil outlet passage is located above the hydraulic cavity; A force applying handle, one end of which is rotatably connected to the hand-shift body, and when the end of the force applying handle rotates relative to the hand-shift body, the piston rod is driven to reciprocate along the through cavity; When the piston rod moves along the axis of the through cavity toward the inlet end of the oil outlet passage, the piston rod pushes the hydraulic oil from the hydraulic cavity into the oil outlet passage; When the piston rod moves along the axis of the through-cavity toward a direction away from the inlet end of the oil outlet passage, the hydraulic oil enters the hydraulic cavity from the oil outlet passage.

2. The bicycle hand lever according to claim 1, characterized in that: When the amount of hydraulic oil in the oil outlet passage required to ensure the initial position of the brake component increases, the hydraulic oil is replenished from the oil storage chamber through the hydraulic chamber into the oil outlet passage.

3. The bicycle hand lever according to claim 2, characterized in that: When the amount of hydraulic oil in the oil outlet passage required to ensure the initial position of the brake component increases, In the process that the piston rod moves along the axis of the through cavity toward the direction close to the inlet end of the oil outlet passage, the piston rod pushes the hydraulic oil into the oil storage cavity; During the movement of the piston rod along the axis of the through cavity toward the direction away from the inlet end of the oil outlet passage, part of the hydraulic oil flows back into the hydraulic cavity from the oil outlet passage, and the hydraulic oil flows from the oil storage cavity into the hydraulic cavity for replenishment.

4. The bicycle hand lever according to claim 1, characterized in that: A first sealing component and a second sealing component are arranged at intervals along the axis of the piston rod, and the first sealing component and the second sealing component are both arranged around the piston rod; The outer ends of the first sealing component and the second sealing component abut against the through cavity to form a hydraulic balance cavity, and the hydraulic balance cavity is filled with hydraulic oil; The hydraulic chamber is formed between the first sealing component and the through chamber.

5. The bicycle hand lever according to claim 4, characterized in that: A first communicating hole is provided on the hydraulic cylinder housing, one end of the first communicating hole is located at the bottom of the oil storage chamber, and the other end of the first communicating hole is located at the top of the hydraulic chamber; the first communicating hole is used to communicate with the oil storage chamber and the hydraulic chamber.

6. The bicycle hand lever according to claim 5, characterized in that: The first communication hole is provided on the hydraulic cylinder housing at a side close to the first sealing component and adjacent to the inlet end of the oil outlet passage; The hydraulic cylinder housing is also provided with a second communication hole; The two ends of the second communication hole are respectively used to communicate with the oil storage chamber and the hydraulic balance chamber; A cross-sectional area of ​​the first communication hole is smaller than a cross-sectional area of ​​the second communication hole.

7. The bicycle hand lever according to claim 6, characterized in that: The manual shift body comprises a manual shift body and an oil storage chamber sealing assembly; The oil storage cavity is formed on the hand shift body, an oil storage cavity opening is formed on the hand shift body, and the oil storage cavity sealing assembly is used for constant pressure elastic sealing of the oil storage cavity opening.

8. The bicycle hand lever according to claim 7, characterized in that: The oil storage chamber sealing assembly includes an elastic oil sac, which is installed at the opening of the oil storage chamber; the elastic oil sac is used to ensure that the pressure inside the oil storage chamber and outside the elastic oil sac is equal through elastic deformation.

9. The bicycle hand lever according to claim 8, characterized in that: The oil storage cavity sealing assembly further comprises an oil storage cavity upper cover, which is mounted outside the elastic oil bag. An oil filling port is provided on the hand-shift body. The oil filling port screw passes through the oil filling port to achieve sealing of the oil storage cavity.

10. The bicycle hand lever according to claim 1, characterized in that: A connecting hole is provided on the upper cover of the oil storage chamber, and a fastener connects the upper cover of the oil storage chamber to the hand-shift body through the connecting hole.

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