Oil cylinder structure and hand transformer applying same

Abstract

The oil cylinder structure is applied to the hand transformer, the hand transformer comprises a brake assembly, a speed change assembly and a hand transformer body, one end of the brake assembly is pivoted to the middle of the hand transformer body, the hand transformer body comprises a first end and a second end opposite to the first end, and the speed change assembly is arranged at the second end; the oil cylinder structure comprises an oil cylinder body arranged at the first end and a sealing part, an oil storage cavity is formed in the oil cylinder body, an opening is formed in the side, away from the second end, of the oil storage cavity, the oil storage cavity obliquely extends in the direction away from the brake assembly, and the sealing part is connected with the opening of the oil storage cavity. The opening of the oil storage cavity is sealed through the sealing part, the sealing performance of the oil cylinder structure is improved, meanwhile, the oil cylinder structure is located at the first end, and the brake assembly and the speed change assembly are located at the second end, so that the oil cylinder structure, the brake assembly and the speed change assembly are compact in structural layout.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle technical field especially, relates to a hand change of oil cylinder structure and application. BACKGROUND

[0002] In prior art, oil cylinder structure usually adopts end cap to seal from end, and the end cap is locked on the oil cylinder body by screw to realize sealing function. However, this sealing mode has problems such as complicated assembly process and poor sealing performance, which is not conducive to long-term use. In addition, in the existing hand change, the layout of the oil cylinder structure, the mechanical gear shifting module (such as the ratchet structure) and the brake structure is relatively dispersed, which occupies a large space and affects the convenience of operation and the space utilization rate of the whole vehicle. SUMMARY

[0003] The utility model aims at providing an oil cylinder structure and a hand change applying the same, and aims at solving the problems of dispersed layout and poor sealing performance of the oil cylinder structure in prior art.

[0004] To solve the above technical problems, the utility model aims at realizing the following technical scheme: providing an oil cylinder structure applied to a hand change, the hand change comprising a brake assembly, a gear shifting assembly and a hand change body, one end of the brake assembly being pivoted to the middle part of the hand change body, the hand change body comprising a first end and a second end opposite to the first end, and the gear shifting assembly being arranged at the second end; the oil cylinder structure comprising an oil cylinder body arranged at the first end and a sealing part, an oil storage cavity being formed in the oil cylinder body, the oil storage cavity having an opening on the side away from the second end, the oil storage cavity extending obliquely in the direction away from the brake assembly, and the sealing part being connected with the opening of the oil storage cavity.

[0005] Further, the oil cylinder structure further comprises an oil bag arranged in the oil storage cavity, the sealing part comprises a sealing body and a sealing inner wall arranged on the inner side of the sealing body, a first buckle member being arranged on the sealing inner wall, the oil bag comprises an oil bag body and a second buckle member connected with the oil bag body, and the first buckle member and the second buckle member are buckledly connected.

[0006] Further, the sealing part further comprises a sealing outer wall arranged on the outer side of the sealing body, the sealing outer wall and the sealing inner wall have a gap therebetween, the sealing outer wall extends towards the oil cylinder body and wraps the outer side of the oil cylinder body, a limiting member is arranged on the inner side of the sealing outer wall, a limiting groove corresponding to the limiting member is formed in the outer wall of the oil cylinder body, and the limiting member and the limiting groove are detachably connected.

[0007] Further, the limiting member is provided with at least two limiting members respectively arranged on the two sides of the sealing outer wall and connected with the limiting groove in interference.

[0008] Further, the oil cylinder body is further provided with an oil injection hole, and the oil cylinder structure further comprises a first sealing member, wherein the oil injection hole is arranged away from the brake assembly and is communicated with the oil storage cavity, and the first sealing member is connected with the oil injection hole.

[0009] Further, the oil bag is provided with a avoiding space, and the oil bag is rotatably arranged in the oil storage cavity, so that the avoiding space faces the oil injection hole.

[0010] Further, the oil injection hole is located at one end of the oil cylinder body close to the sealing part and is arranged obliquely relative to the oil storage cavity.

[0011] Further, the oil cylinder body is further provided with a process hole, and the oil cylinder structure further comprises a second sealing member, wherein the process hole is arranged away from the brake assembly and is communicated with the oil storage cavity, and the second sealing member is connected with the process hole.

[0012] Further, the oil cylinder body is further provided with a piston cavity and an oil supplement hole, the piston cavity is communicated with the oil storage cavity through the oil supplement hole, the oil supplement hole is located at one side of the oil storage cavity, the process hole is located at the other side of the oil storage cavity, and the positions of the oil supplement hole and the process hole correspond to each other.

[0013] The utility model also provides a hand change, including oil cylinder structure as described above.

[0014] The utility model provides a kind of oil cylinder structure, it is applied to hand change, and the hand change includes brake assembly, gear shift assembly and hand change body, one end of the brake assembly is pivoted in the middle part of the hand change body, the hand change body includes first end and second end opposite thereto, and the gear shift assembly is arranged at the second end;The oil cylinder structure includes the oil cylinder body and sealing part of being arranged at the first end, the oil storage cavity is opened in the oil cylinder body, the oil storage cavity has opening towards the side away from the second end, the oil storage cavity is obliquely extended along the direction away from the brake assembly, and the sealing part is connected with the opening of the oil storage cavity.The utility model seals the opening of oil storage cavity by sealing part, improves the sealing property of oil cylinder structure, and simultaneously, oil cylinder structure is located at first end, brake assembly and gear shift assembly are located at second end, so that oil cylinder structure and brake assembly and gear shift assembly structure layout are relatively compact. ACCURATE DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in embodiment description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0016] Figure 1 A structure diagram of a hand change provided by the embodiment of the utility model;

[0017] Figure 2 A section view of the hand change provided by the embodiment of the utility model Figure 1 ;

[0018] Figure 3 An explosion view of the oil cylinder structure provided by the embodiment of the utility model;

[0019] Figure 4 A section view of the oil cylinder main body provided by the embodiment of the utility model;

[0020] Figure 5 A Figure 2 enlarged view of part A;

[0021] Figure 6 A Figure 2 enlarged view of part B;

[0022] Figure 7 A section view of the hand change provided by the embodiment of the utility model Figure 2 .

[0023] Explanation of the figure:

[0024] 100, brake assembly; 200, gear change assembly; 300, hand change main body;

[0025] 10, oil cylinder main body; 11, oil storage cavity; 111, oil bag; 1111, oil bag main body; 1112, second buckle; 1113, avoiding space; 12, limiting groove; 13, oil injection hole; 14, process hole; 15, piston cavity; 16, oil supplementing hole; 17, inclined hole;

[0026] 20, sealing part; 21, sealing main body; 22, sealing inner wall; 221, first buckle; 23, sealing outer wall; 231, limiting part;

[0027] 30, first sealing part;

[0028] 40, second sealing part. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0030] It should be understood that the terms "comprises" and "comprising," when used in this specification and the following claims, indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0031] It should also be understood that the terms used in the specification and the following claims are merely used to describe particular embodiments and do not intend to restrict the present application. As used in the specification and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0032] It should be further understood that the term "and / or" used in the specification and the following claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0033] In conjunction with Figures 1 to 4 As shown, the oil cylinder structure is applied to the hand change, the hand change includes a brake assembly 100, a gear shifting assembly 200 and a hand change main body 300, one end of the brake assembly 100 is pivoted to the middle part of the hand change main body 300, the hand change main body 300 includes a first end and a second end opposite to the first end, and the gear shifting assembly 200 is arranged at the second end; the oil cylinder structure includes an oil cylinder main body 10 arranged at the first end and a sealing part 20, an oil storage cavity 11 is arranged in the oil cylinder main body 10, the oil storage cavity 11 has an opening towards the side away from the second end, and the oil storage cavity 11 extends obliquely in the direction away from the brake assembly 100, and the sealing part 20 is connected with the opening of the oil storage cavity 11.

[0034] In the embodiment, the oil cylinder main body 10 is internally provided with the oil storage cavity 11, the opening of the oil storage cavity 11 is towards the side away from the second end, and the oil storage cavity 11 extends obliquely in the direction away from the brake assembly 100, that is, the axis of the oil storage cavity 11 is oblique to the main axis of the gear shifting assembly 200, and the oblique design can optimize the arrangement of the oil storage cavity 11, reduce the flow interference of the oil under different operation angles, and improve the stability of the hydraulic transmission.

[0035] The sealing part 20 is connected with the opening of the oil storage cavity 11, and is used for sealing the oil storage cavity 11 to prevent liquid leakage.

[0036] In the operation process, when the brake assembly 100 is driven by an external force, the brake system is driven to work. Due to the inclined arrangement of the oil storage cavity 11 away from the brake assembly 100, the flow of the hydraulic medium can be more stable in different installation angles or use states, avoiding the problem of uneven braking force caused by oil accumulation or poor oil supply. In addition, the inclined design can also effectively avoid other structures inside the hand change, improve the compactness of the overall structure, and make the hand change adapt to smaller installation space and meet the lightweight demand.

[0037] In combination Figure 5 As shown in an embodiment, the oil cylinder structure further comprises an oil bag 111 arranged in the oil storage cavity 11, the sealing part 20 comprises a sealing body 21 and a sealing inner wall 22 arranged on the inner side of the sealing body 21, the sealing inner wall 22 is provided with a first buckle 221, the oil bag 111 comprises an oil bag body 1111 and a second buckle 1112 connected with the oil bag body 1111, and the first buckle 221 is buckled with the second buckle 1112.

[0038] In this embodiment, the first buckle 221 and the second buckle 1112 are buckled with each other to ensure the stable installation of the oil bag 111 and improve the sealing performance. In the specific use process, the oil bag 111 in the oil storage cavity 11 is used to store hydraulic medium and adapt to different pressure changes through its flexible structure, which plays a buffering role and reduces the pulsation of oil. The first buckle 221 is arranged on the sealing inner wall 22 and buckled with the second buckle 1112 of the oil bag 111. In the assembly process, the first buckle 221 is inserted into the oil bag 111 and buckled with each other through the second buckle 1112, realizing quick installation. This buckling connection method does not require additional fasteners, making the assembly process more convenient, and avoiding the problems of looseness, poor sealing or installation error that may be caused by traditional screw or press fitting methods, thereby improving the sealing performance and long-term use stability of the overall structure. In addition, the sealing body 21 of the sealing part 20 can provide effective protection for the opening area of the oil storage cavity 11 to prevent external pollutants from entering.

[0039] In an embodiment, the sealing part 20 further comprises a sealing outer wall 23 arranged on the outer side of the sealing body 21, the sealing outer wall 23 and the sealing inner wall 22 have a gap therebetween, the sealing outer wall 23 extends towards the oil cylinder body 10 and wraps on the outer side of the oil cylinder body 10, the inner side of the sealing outer wall 23 is provided with a limiting piece 231, and the outer wall of the oil cylinder body 10 is provided with a limiting groove 12 corresponding to the limiting piece 231, and the limiting piece 231 and the limiting groove 12 are detachably connected.

[0040] In the embodiment, the sealing outer wall 23 extends towards the oil cylinder body 10 and wraps around the outer side of the oil cylinder body 10 to form a surrounding covering structure, thereby improving the overall fixing effect of the sealing part 20 and preventing displacement of the sealing part 20 due to vibration or external force. On the inner side of the sealing outer wall 23, a limiting part 231 is arranged to further enhance the stability of the cooperation between the sealing part 20 and the oil cylinder body 10. A limiting groove 12 is formed on the outer wall of the oil cylinder body 10, and the shape and size of the limiting groove 12 are matched with the limiting part 231, so that the limiting part 231 can be embedded in the limiting groove 12 (for example, the limiting part 231 is in the shape of a barb, and the limiting groove 12 is correspondingly shaped as a circular groove for accommodating the barb). Through the cooperation of the limiting part 231 and the limiting groove 12, the sealing part 20 can be mounted on the oil cylinder body 10 and can be detached when maintenance or replacement is required, thereby avoiding the problem of difficult disassembly caused by adhesion or threaded locking in the traditional sealing structure.

[0041] In an embodiment, the limiting part 231 is provided with at least two limiting parts arranged on both sides of the sealing outer wall 23 and connected with the limiting groove 12 in an interference fit.

[0042] In the embodiment, the limiting part 231 is provided with at least two limiting parts arranged on both sides of the sealing outer wall 23. This design can provide uniform limiting support in multiple directions and avoid tilting or loosening of the sealing part 20 caused by uneven force on one side. The limiting part 231 and the limiting groove 12 are connected in an interference fit to achieve high-strength fixation. The interference fit means that the size of the limiting part 231 is slightly larger than the corresponding size of the limiting groove 12, so that during installation, the limiting part 231 needs to be embedded in the limiting groove 12 by a certain pressing force to form a fit. In the specific assembly process, the sealing outer wall 23 of the sealing part 20 extends towards the oil cylinder body 10 and wraps around the outer side of the oil cylinder body 10. When the sealing part 20 is installed on the oil cylinder body 10, the two parts of the limiting part 231 are respectively embedded in the two sides of the limiting groove 12 and provide additional fixation through the interference fit. After assembly is completed, due to the tight combination of the interference fit, the sealing part 20 can withstand a larger external load and environmental changes without loosening or displacement, thereby ensuring long-term stability of the sealing performance.

[0043] In an embodiment, an oil injection hole 13 is formed on the oil cylinder body 10, and the oil cylinder structure further comprises a first sealing part 30, the oil injection hole 13 is arranged away from the brake assembly 100 and communicates with the oil storage cavity 11, and the first sealing part 30 is connected with the oil injection hole 13.

[0044] In the present embodiment, an oil filling hole 13 is formed on the oil cylinder body 10 to realize quick filling and supplement of the hydraulic medium in the oil storage cavity 11. The first sealing member 30 is connected with the oil filling hole 13 to ensure that the oil filling hole 13 is sealed in the non-filling state to prevent leakage of hydraulic oil or entry of external contaminants into the oil storage cavity 11. When it is necessary to supplement or replace the hydraulic medium in the oil storage cavity 11, the first sealing member 30 can be opened to connect the oil filling hole 13 with the external environment, and a special oil filling tool is used to fill the hydraulic medium into the oil storage cavity 11. Since the oil filling hole 13 is arranged away from the brake assembly 100, the influence of the oil filling process on the brake assembly 100 is avoided, the operation is more convenient, and the hydraulic medium is prevented from overflowing to contaminate the brake assembly or cause misoperation. The structure of the first sealing member 30 can adopt buckle sealing or rubber plug sealing and the like to adapt to different application requirements. In the buckle sealing mode, the first sealing member 30 can be matched with the buckle structure of the oil filling hole 13 to realize quick disassembly and assembly and improve the maintenance efficiency. In the rubber plug sealing mode, the first sealing member 30 can adopt an elastic sealing structure to tightly adhere to the oil filling hole 13 through the radial pressure of the sealing member to realize good sealing effect.

[0045] In addition, in order to ensure cleanliness, the material of the first sealing member 30 can be selected from materials with excellent oil resistance and aging resistance, such as fluororubber (FKM), silicone rubber (VMQ), or polytetrafluoroethylene (PTFE), and the like, to improve the service life and weather resistance of the sealing component. After a long time of use, if it is necessary to replace the hydraulic medium or perform system maintenance, the first sealing member 30 only needs to be disassembled to complete the oil filling or cleaning operation, which greatly improves the maintenance convenience of the oil cylinder structure. Of course, a first sealing ring can also be sleeved on the first sealing member 30 to further strengthen the sealing effect.

[0046] In an embodiment, the oil bag 111 is provided with a relief space 1113, and the oil bag 111 is rotatably arranged in the oil storage cavity 11 to enable the relief space 1113 to face the oil filling hole 13.

[0047] In the present embodiment, the relief space 1113 is arranged on the oil bag 111, and the oil bag 111 can rotate in the oil storage cavity 11 to enable the relief space 1113 to be aligned with the oil filling hole 13, thereby providing a smooth channel during oil filling and avoiding scratching of the oil bag 111 when the first sealing member 30 is sealed on the oil filling hole 13. In order to ensure that the oil bag 111 can be stably positioned after rotation adjustment, the inner wall of the oil storage cavity 11 can be designed with a positioning protrusion or a guide member to cooperate with the outer wall of the oil bag 111, so that the oil bag 111 can be stably kept in the state that the relief space 1113 faces the oil filling hole 13 after reaching a specific angle, preventing deviation due to vibration or external force in subsequent operations and affecting oil filling effect.

[0048] In an embodiment, the oil filling hole 13 is located at one end of the oil cylinder body 10 close to the sealing part 20 and is arranged obliquely relative to the oil storage cavity 11.

[0049] In the present embodiment, by arranging the oil filling hole 13 at one end of the oil cylinder body 10 close to the sealing part 20 and obliquely relative to the oil storage cavity 11, the hydraulic medium can flow into the oil storage cavity 11 along the oblique direction of the oil filling hole 13, avoiding stagnation and improving the filling efficiency. In addition, the obliquely arranged oil filling hole 13 can effectively reduce the risk of bubble stagnation. During the oil filling process, the hydraulic medium flows into the oil storage cavity 11 along the oblique oil filling hole 13, and due to the action of gravity and the flow characteristics of the oil itself, the bubbles can be discharged along the oblique direction.

[0050] In combination Figure 6 As shown in the figure, in an embodiment, a process hole 14 is also provided on the oil cylinder body 10, and the oil cylinder structure further comprises a second sealing part 40, the process hole 14 is arranged away from the brake assembly 100 and communicates with the oil storage cavity 11, and the second sealing part 40 is connected with the process hole 14.

[0051] In the present embodiment, the main function of the process hole 14 is to provide an auxiliary channel during the manufacturing process, so as to facilitate the processing, cleaning and detection of the internal structure of the oil cylinder body 10. For example, when the deep cavity processing of the oil storage cavity 11 of the oil cylinder body 10 is performed, the process hole 14 can be used as an auxiliary channel to make it easier for the processing tool to contact the inside of the oil storage cavity 11, thereby improving the processing precision. In addition, after processing is completed, the process hole 14 can also be used to flush or blow the inside of the oil storage cavity 11 to remove residual metal chips, processing liquid or other impurities, so as to ensure the cleanliness of the inside of the oil storage cavity 11, thereby reducing the risk of blockage or pollution of the hydraulic system during subsequent use.

[0052] In order to ensure that the process hole 14 does not affect the sealing performance of the hydraulic system in the non-operation state, the second sealing part 40 is used to seal the process hole 14. The second sealing part 40 can adopt a buckle sealing or elastic sealing mode to adapt to different use requirements. In the buckle sealing mode, the second sealing part 40 can be fixed to the process hole 14 through an elastic buckle structure to realize quick disassembly and assembly, which is suitable for application scenarios that require frequent maintenance; in the elastic sealing mode, the second sealing part 40 can be made of oil-resistant rubber material and tightly fit with the process hole 14 through radial pressure, so as to ensure the sealing performance while providing good anti-vibration capability. In addition, the arrangement of the position of the process hole 14 away from the brake assembly 100 helps to optimize the overall structure of the hand brake and avoid assembly interference problems caused by unreasonable space layout. Of course, a second sealing ring can also be sleeved on the second sealing part 40 to further enhance the sealing effect.

[0053] In an embodiment, the oil cylinder body 10 is further provided with a piston cavity 15 and a supplementary oil hole 16, the piston cavity 15 is communicated with the oil storage cavity 11 through the supplementary oil hole 16, the supplementary oil hole 16 is located at one side of the oil storage cavity 11, and the process hole 14 is located at the other side of the oil storage cavity 11, and the positions of the supplementary oil hole 16 and the process hole 14 correspond to each other.

[0054] In the embodiment, in the running process, along with the operation of the brake assembly 100, the hydraulic medium in the piston cavity 15 flows, so that the hydraulic driving force is generated. When the oil amount in the piston cavity 15 is reduced due to consumption or leakage, the supplementary oil hole 16 can timely supplement the hydraulic medium from the oil storage cavity 11, so as to maintain the hydraulic balance in the piston cavity 15. The supplementary oil hole 16 and the process hole 14 are oppositely arranged at two sides of the oil storage cavity 11, and the process hole 14 can be used for machining the supplementary oil hole 16. In the machining process, the existence of the process hole 14 not only facilitates the machining and cleaning of the supplementary oil hole 16, but also can be used as an auxiliary channel when the hydraulic system is detected, so as to facilitate the pressure test or the air tightness test.

[0055] In combination with Figure 7 As shown in the figure, in an embodiment, an inclined hole 17 is further arranged in the oil cylinder body 10, and the inclined hole 17 overlaps with the structure of the oil cylinder body 10 when viewed along the pivot axis direction of the brake assembly 100, and the inclined hole 17 itself does not bear the functions of hydraulic oil flow, sealing and the like, that is, does not affect the normal working state of the oil storage cavity 11.

[0056] The embodiment of the utility model further provides a hand changer, including the oil cylinder structure as described above.

[0057] In the embodiment, the hand changer is the core control assembly of the bicycle or the electric power-assisted bicycle, and includes the brake assembly 100, the gear shifting assembly 200 and the hand changer body 300. By integrating the oil cylinder structure in the hand changer body 300, the hand changer has the efficient hydraulic transmission and braking capacity while realizing the gear shifting control, and the whole vehicle control performance is improved.

[0058] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An oil cylinder structure applied to a hand lever, the hand lever comprising a brake assembly, a gear shift assembly and a hand lever body, one end of the brake assembly being pivoted to a middle part of the hand lever body, the hand lever body comprising a first end and a second end opposite to the first end, the gear shift assembly being arranged at the second end; characterized in that, The oil cylinder structure comprises an oil cylinder body provided at the first end and a sealing part, the oil cylinder body is internally provided with an oil storage cavity, the oil storage cavity is provided with an opening towards a side away from the second end, and the oil storage cavity extends obliquely away from the brake assembly.

2. The oil cylinder structure according to claim 1, characterized by The oil cylinder structure further comprises an oil bag provided in the oil storage cavity, the sealing part comprises a sealing body and a sealing inner wall provided at the inner side of the sealing body, the sealing inner wall is provided with a first buckle, and the oil bag comprises an oil bag body and a second buckle connected with the oil bag body.

3. The oil cylinder structure according to claim 2, characterized by The sealing part further comprises a sealing outer wall provided at the outer side of the sealing body, the sealing outer wall and the sealing inner wall are provided with a gap therebetween, the sealing outer wall extends towards the oil cylinder body and is wrapped at the outer side of the oil cylinder body, the inner side of the sealing outer wall is provided with a limiting piece, the outer wall of the oil cylinder body is provided with a limiting groove corresponding to the limiting piece, and the limiting piece and the limiting groove are detachably connected.

4. The oil cylinder structure according to claim 3, characterized by The limiting piece is provided with at least two limiting pieces respectively located at the two sides of the sealing outer wall and is connected with the limiting groove in interference.

5. The oil cylinder structure according to claim 2, wherein The oil cylinder body is further provided with an oil injection hole, and the oil cylinder structure further comprises a first sealing piece, the oil injection hole is provided away from the brake assembly and is communicated with the oil storage cavity, and the first sealing piece is connected with the oil injection hole.

6. The oil cylinder structure according to claim 5, characterized by The oil bag is provided with a avoiding space, and the oil bag is rotatably provided in the oil storage cavity so that the avoiding space faces the oil injection hole.

7. The oil cylinder structure according to claim 5, wherein The oil injection hole is located at one end of the oil cylinder body close to the sealing part and is obliquely provided relative to the oil storage cavity.

8. The oil cylinder structure according to claim 1, wherein The oil cylinder body is further provided with a process hole, and the oil cylinder structure further comprises a second sealing piece, the process hole is provided away from the brake assembly and is communicated with the oil storage cavity, and the second sealing piece is connected with the process hole.

9. The oil cylinder structure according to claim 8, characterized by The oil cylinder body is further provided with a piston cavity and an oil supplement hole, the piston cavity is communicated with the oil storage cavity through the oil supplement hole, the oil supplement hole is located at one side of the oil storage cavity, the process hole is located at the other side of the oil storage cavity, and the positions of the oil supplement hole and the process hole correspond to each other.

10. A hand, characterized in that, The oil cylinder structure comprises an oil cylinder structure as claimed in any one of claims 1-9. The oil cylinder structure comprises an oil cylinder structure as claimed in any one of claims 1-9.

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