Oil pressure balance structure, linear pull oil pressure conversion pump and vehicle

Abstract

The utility model relates to an oil pressure balance structure, a linear pull oil pressure conversion pump and a vehicle. The oil pressure balancing structure is used in cooperation with a pump body, and the pump body is provided with at least one oil cylinder cavity, at least one oil cylinder, at least one oil cylinder, at least one oil cylinder, at least one oil cylinder and at least one oil cylinder, the at least one oil pool cavity is formed in the pump body, is communicated with the oil cylinder cavity through a communicating hole and is filled with brake oil; and the oil pressure balancing piece is arranged in the oil pool cavity so as to supplement brake oil into the oil cylinder cavity during brake action and balance brake oil pressure. In the braking process, braking oil in the oil pool cavity is automatically supplemented into the oil cylinder cavity with the reduced pressure, and the sufficient oil amount in a braking system is maintained for braking; when liquid needs to be supplemented in the pump body, an oil injection tool is inserted into the oil injection side hole, and the oil seal bolt is reversely screwed and loosened along the thread, so that brake oil can be injected, air cannot enter a brake system, and the brake performance of a vehicle is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle accessories, and particularly relates to an oil pressure balance structure, a wire-pull oil pressure conversion pump and a vehicle. Background Art

[0002] The wire-pull oil disc brake is a new type of disc brake that combines the wire-pull disc brake and the oil pressure disc brake in the current market. It has the advantages of the wire-pull disc brake and the oil pressure disc brake, with lower cost and better braking experience.

[0003] The key component of the wire-pull oil disc brake is the wire-pull oil pressure conversion pump, which is used to convert the wire-pull force of the brake lever into oil pressure and transport it to the oil pressure lower pump. The existing wire-pull oil pressure conversion pump also has the disadvantages of the traditional oil pressure disc brake, that is, after using for a period of time, as the brake pads wear, the piston in the brake lower pump will require more brake fluid pressure to push forward for braking, and insufficient brake fluid pressure will cause brake failure;

[0004] At this time, it is necessary to open the oil hole sealed by the oil seal bolt to supplement the brake fluid into the oil cylinder cavity. The oil hole is generally opened on the oil sump cavity communicating with the oil cylinder cavity. Opening the oil hole will allow air to enter the braking system. However, during the process of replenishing the fluid and discharging the air, limited by the oil circuit, the air in the braking system may not be completely discharged. The remaining air will not improve the brake failure of the braking system after replenishing the fluid, and even pose a greater risk.

[0005] Therefore, we propose an oil pressure balance structure, a wire-pull oil pressure conversion pump and a vehicle. Summary of the Utility Model

[0006] This application provides an oil pressure balance structure, a wire-pull oil pressure conversion pump and a vehicle, so as to at least solve the problem that in the prior art, during the process of replenishing the fluid and discharging the air in the braking system, limited by the oil circuit, the internal air may not be completely discharged, and the remaining air will not improve the braking of the braking system after replenishing the fluid, and even pose a greater risk.

[0007] In a first aspect, this application provides an oil pressure balance structure, which is used in conjunction with a pump body. The pump body is provided with:

[0008] At least one oil cylinder cavity, which is opened on the pump body and has an oil outlet communicating radially therewith;

[0009] At least one oil sump cavity, which is opened on the pump body and is connected to the oil cylinder cavity through a communication hole, and there is brake fluid in the oil sump cavity and the oil cylinder cavity;

[0010] An oil pressure balance member, which is arranged in the oil sump cavity to supplement brake fluid into the oil cylinder cavity during a braking action to balance the braking oil pressure.

[0011] Optionally, the oil pressure balance member includes:

[0012] A piston body, which is movably assembled in the oil sump cavity, and is provided with an axially penetrating liquid supplement channel thereon;

[0013] An oil seal bolt, the middle part of which has an external thread section, and the external thread section is threadedly assembled with the internal thread surface formed on the inner wall of the liquid supplement channel to block the liquid supplement channel;

[0014] An oil sump cover, which is fixedly assembled on the opening end of the oil sump cavity through screw members, and the oil sump cover is provided with a first assembly hole communicating with the external atmospheric pressure.

[0015] Optionally, an oil seal conical surface is provided in the inner cavity of the liquid supplement channel, and a conical bolt tail is formed at the bolt tail of the oil seal bolt to cooperate with the oil seal conical surface to seal the liquid supplement channel.

[0016] Optionally, the oil pressure balance member further includes:

[0017] An oil injection side hole, which is opened in the middle of the oil seal bolt in the longitudinal direction, and its first end penetrates through to the bolt head of the oil seal bolt member, and its second end penetrates through to the annular side wall of the oil seal bolt near the conical bolt tail.

[0018] Optionally, a first piston ring is sleeved on the piston body, and the first piston ring is in interference fit with the inner wall surface of the oil sump cavity.

[0019] Optionally, the diameter of the first assembly hole is at least larger than the bolt head diameter of the oil seal bolt.

[0020] In a second aspect, the present application provides a wire-pulled oil pressure conversion pump, which has the oil pressure balance structure described in the first aspect above, and further includes:

[0021] A wire-pulled oil driving member, which is arranged in the oil cylinder cavity to drive the brake oil in the oil cylinder cavity to be output from the oil outlet during a braking action.

[0022] Optionally, the wire-pulled oil driving member includes:

[0023] A piston pull rod, which is movably assembled in the oil cylinder cavity, and a hollow hole for threading a wire is axially opened in the middle thereof;

[0024] A sealing ring, which is movably sleeved on the first end of the piston pull rod and is limitedly assembled on a stepped portion formed on the inner wall of the oil cylinder cavity;

[0025] A second piston ring, which is radially sleeved on a stepped section formed in the middle of the piston pull rod, and its outer wall surface abuts against the inner wall of the oil cylinder cavity. A brake oil cavity is formed between the second piston ring and the sealing ring, and the brake oil cavity is communicated with the communication hole and the oil outlet;

[0026] A plug base, which is threadedly assembled on the first open end of the oil cylinder cavity and presses and fixes the axial position of the sealing ring, and a first movable cavity is opened in the middle thereof;

[0027] An elastic member, one end of which is limitedly assembled in the hollow hole, and the other end of which extends into the first movable cavity to provide an elastic restoring force after the piston rod moves;

[0028] An end cover plate, which covers the second open end of the oil cylinder cavity to limit the starting point of the stroke of the piston pull rod, and is provided with a second assembly hole;

[0029] A wire clip terminal, the first end of which passes through the second assembly hole and is threadedly assembled with the second end of the piston pull rod, and a wire locking screw is provided on the wire clip terminal to fix the pull wire.

[0030] Optionally, the line-pulling oil drive component further includes:

[0031] A wire-threading sleeve, which is inserted into the plug base to thread the pull wire;

[0032] A sealing screw sleeve is threadedly assembled with an end of the plug base away from the sealing ring to fix the threading sleeve and seal the first open end of the cylinder cavity.

[0033] In a third aspect, the present application provides a vehicle having the oil pressure balancing structure described in the first aspect, or

[0034] The wire-pull oil pressure conversion pump described in the second aspect above.

[0035] Compared with the related art, the oil pressure balancing structure, the wire-pull oil pressure conversion pump and the vehicle provided by the present application have at least the following technical effects:

[0036] Through the movable assembly of the piston body in the oil pool cavity and the limiting stroke of the oil pool cover, as the brake pads wear, during the braking process, the brake oil in the oil pool cavity automatically replenishes oil into the cylinder cavity with reduced pressure, and the piston body moves in the direction of brake oil output, thereby maintaining sufficient oil in the brake system for braking; when fluid replenishment is required in the pump body, an oil filling tool is inserted into the oil filling side hole, the oil seal plug is loosened by twisting it in the opposite direction along the thread, and a liquid inlet channel is generated between the tapered plug tail and the tapered surface of the oil seal, and the liquid inlet channel is connected to the second end of the oil filling side hole. At this time, the injected brake oil can directly enter the oil pool cavity, and air will not enter the brake system, thereby achieving rapid brake oil replenishment and ensuring the braking performance of the vehicle.

[0037] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0039] Figure 1 It is a three-dimensional structural schematic diagram of a wire-pulled oil pressure conversion pump shown according to an exemplary embodiment.

[0040] Figure 2 It is a structural schematic diagram of a pump body shown according to an exemplary embodiment.

[0041] Figure 3 It is an exploded view of the structure of a wire-pulled oil pressure conversion pump shown according to an exemplary embodiment.

[0042] Figure 4 It is an exploded view of an oil pressure balance structure shown according to an exemplary embodiment.

[0043] Explanation of reference numerals:

[0044] Pump body 10: oil cylinder cavity 101, oil sump cavity 102, communication hole 103, oil outlet 104, assembly part 105;

[0045] Oil pressure balance member 20: piston body 201, first piston ring 2011, liquid replenishing channel 202, oil seal bolt 203, tapered bolt tail 2031, oil injection side hole 204, oil sump cover 205, first assembly hole 2051, screw member 206;

[0046] Wire-pulled oil driving member 30: piston pull rod 301, second piston ring 302, end head cover plate 303, second assembly hole 3031, wire buckle terminal 304, elastic member 305, plug base 306, sealing sleeve 307, wire threading sleeve 308, sealing ring 309. Specific embodiments

[0047] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0048] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0049] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] In the related art, the key component of the cable-actuated oil disc brake is the cable-actuated oil pressure conversion pump, which is used to convert the cable pulling force of the cable brake lever into oil pressure and deliver it to the oil pressure lower pump. The existing cable-actuated oil pressure conversion pump also has the disadvantages of traditional oil disc brakes. That is, after using for a period of time, as the brake pads wear, the piston in the brake lower pump will require more brake fluid pressure to push forward for braking. Insufficient brake fluid pressure will cause brake failure.

[0051] At this time, it is necessary to open the oil hole sealed by the oil seal bolt to supplement the brake fluid into the oil cylinder cavity. The oil hole is generally opened on the oil sump cavity communicating with the oil cylinder cavity. Opening the oil hole will allow air to enter the braking system. However, during the process of replenishing fluid and discharging air, due to limitations of the oil circuit, the air in the braking system may not be completely discharged. The remaining air will not improve the brake failure of the braking system after fluid replenishment, and even pose a greater risk.

[0052] Based on the above situation, the embodiments of the present utility model provide an oil pressure balance structure, a cable-actuated oil pressure conversion pump, and a vehicle, which will be elaborated in detail below with reference to specific embodiments and drawings.

[0053] Embodiment 1

[0054] The embodiment of the present utility model provides an oil pressure balance structure. Figure 1 is a perspective structural view of a cable-actuated oil pressure conversion pump shown according to an exemplary embodiment. Figure 2 is a structural view of a pump body shown according to an exemplary embodiment. As Figure 1-2 shown, this oil pressure balance structure is used in conjunction with a pump body 10, and the pump body 10 is provided with:

[0055] The oil cylinder chamber 101, with a quantity of at least one, is formed through the pump body 10 and has an oil outlet 104 radially communicating therewith; in this embodiment, referring to the appendix Figure 1-2 , the number of the oil cylinder chambers 101 is two and they are arranged in parallel;

[0056] The oil sump chamber 102, with a quantity of at least one, is formed on the pump body 10 and is connected to the oil cylinder chamber 101 through a communication hole 103, and there is brake fluid in the oil sump chamber 102 and the oil cylinder chamber 101 that can meet the braking requirements; in this embodiment, referring to the appendix Figure 1-2 , the number of the oil sump chambers 102 is two, the two oil sump chambers 102 are formed on the same horizontal axis and their open ends are symmetrically distributed, and each single oil sump chamber 102 is connected to a single oil cylinder chamber 101 through the communication hole 103 in a one-to-one correspondence;

[0057] The oil pressure balancing member 20 is arranged in the oil sump chamber 102 to supplement brake fluid into the oil cylinder chamber 101 during the braking action and balance the braking oil pressure;

[0058] Figure 4 is an exploded view of the oil pressure balancing structure shown according to an exemplary embodiment. Referring to the appendix Figure 4 , the oil pressure balancing member 20 includes:

[0059] A piston body 201, which is movably assembled in the oil sump chamber 102 and has an axially penetrating liquid supplement channel 202 formed thereon; a first piston ring 2011 is sleeved on the piston body 201, and the first piston ring 2011 is in interference fit with the inner wall surface of the oil sump chamber 102;

[0060] An oil seal bolt 203, the middle part of which has an external thread section, and the external thread section is threadedly assembled with the internal thread surface formed on the inner wall of the liquid supplement channel 202 to block the liquid supplement channel 202. An oil seal conical surface is provided in the inner cavity of the liquid supplement channel 202, and a conical bolt tail 2031 that cooperates with the oil seal conical surface to seal the liquid supplement channel 202 is formed at the bolt tail of the oil seal bolt 203;

[0061] An oil sump cover 205, which is fixedly assembled on the open end of the oil sump chamber 102 through a screw member 206, and a first assembly hole 2051 communicating with the external atmospheric pressure is formed on the oil sump cover 205; it can be understood that the diameter of the first assembly hole 2051 is at least larger than the bolt head diameter of the oil seal bolt 203; preferably, the inner cavity space of the first assembly hole 2051 covers the oil injection side hole 204, which is convenient for the output port of the oil injection tool to enter, so as to facilitate the operation of supplementing brake fluid;

[0062] The oil injection side hole 204 is formed in the middle of the oil seal bolt 203 in the longitudinal direction, and its first end penetrates through to the bolt head of the oil seal bolt, and its second end penetrates through to the annular side wall of the oil seal bolt 203 close to the conical bolt tail 2031.

[0063] In the technical solution of the above embodiments, referring to the attached Figure 1-2 figures 3 and 4, in the initial state, the piston body 201 is on the side of the oil sump cavity 102 close to the opening end of the oil sump cavity 102 and is limited in stroke by the oil sump cover 205. As the brake pads wear, during braking, the brake fluid in the oil sump cavity 102 automatically replenishes the oil cylinder cavity 101 with reduced pressure, and the piston body 201 moves in the direction of the brake fluid output, so as to maintain sufficient oil volume in the brake system for braking;

[0064] When brake fluid needs to be replenished in the pump body 10, insert the output port of the refueling tool into the refueling side hole 204 and pre-inject a small amount of brake fluid to discharge the residual air in the refueling side hole 204 and the liquid replenishment channel 202. Then use the tool to turn the bolt head of the oil seal bolt 203 and turn it slightly in the threaded direction to loosen a certain stroke. At this time, an annular liquid inlet channel is generated between the conical bolt tail 2031 and the oil seal conical surface. This liquid inlet channel is connected to the second end of the refueling side hole 204. At this time, when injecting brake fluid, it can directly enter the oil sump cavity 102, and no air will enter the braking system, realizing rapid replenishment of brake fluid and ensuring the braking performance of the vehicle.

[0065] At the same time, it can be understood that at this time, the sealing ring 409 sleeved on the oil seal bolt 404 is still in an interference fit state with the inner wall surface of the refueling hole 401, avoiding leakage of brake fluid during the liquid replenishment state.

[0066] It can be understood that during long-term use, as the brake pads wear, the brake fluid in the oil sump cavity 102 can automatically replenish the oil cylinder cavity 101 with reduced pressure. As a result, an expansion allowance will gradually form between the piston body 201 and the oil sump cover 205. During braking, the brake fluid will conduct the heat of the brake pads and expand due to heat. The expanded brake fluid can enter the oil sump cavity 102 through the communication hole 103 in the oil cylinder cavity 101 to achieve pressure balance, thus avoiding the risk of disc lock-up and maintaining and optimizing the smooth braking effect of the hydraulic disc brake; at this time, the brake fluid entering the oil sump cavity 102 will push the piston body 201 to move towards the oil sump cover 205 in the oil sump cavity 102 to accommodate the expanded volume required by the brake fluid; when the temperature of the brake fluid decreases, its volume shrinks and automatically returns to the oil cylinder cavity 101 with reduced pressure, and the piston body 301 also returns to its original position step by step under the action of the external atmospheric pressure as the brake fluid returns.

[0067] It can be further understood that during vehicle installation, a certain expansion allowance can also be directly set between the piston body 201 and the oil sump cover 205.

[0068] In summary, the oil pressure balance structure provided by the embodiment of the present utility model has the piston body 201 movably assembled in the oil sump cavity 102 and the stroke is limited by the oil sump cover 205. As the brake pads wear, during the braking process, the brake fluid in the oil sump cavity 102 automatically replenishes the oil cylinder cavity 101 with reduced pressure, and the piston body 201 moves in the direction of the brake fluid output, so as to maintain sufficient oil quantity in the brake system for braking; when the pump body 10 needs to be replenished with fluid, an oil injection tool is inserted into the oil injection side hole 204, the oil seal bolt 203 is unscrewed in the reverse direction of the thread to be loosened, a liquid inlet channel is generated between the conical bolt tail 2031 and the oil seal conical surface, and the liquid inlet channel is connected to the second end of the oil injection side hole 204. At this time, the injected brake fluid can directly enter the oil sump cavity 102, and no air will enter the braking system, realizing rapid replenishment of the brake fluid and ensuring the braking performance of the vehicle.

[0069] Embodiment 2

[0070] Embodiment 2 of the present application provides a wire-pull oil pressure conversion pump. Figure 3 It is an exploded view of the structure of the wire-pull oil pressure conversion pump shown according to an exemplary embodiment. Refer to the attached Figure 3 , this wire-pull oil pressure conversion pump has the oil pressure balance structure of Embodiment 1, and further includes:

[0071] A wire-pull oil driving member 30, which is arranged in the oil cylinder cavity 101 to drive the brake fluid in the oil cylinder cavity 101 to be output from the oil outlet 104 during the braking action. In this embodiment, the number of the oil cylinder cavities 101 is two, and the number of the wire-pull oil driving members 30 is also two and are respectively located in the two oil cylinder cavities 101.

[0072] Continue to refer to the attached Figure 3 , the wire-pull oil driving member 30 includes:

[0073] A piston pull rod 301, which is movably assembled in the oil cylinder cavity 101, and a hollow hole for threading a wire is axially formed in the middle thereof;

[0074] A sealing ring 309, which is movably sleeved on the first end of the piston pull rod 301 and is limitedly assembled on the stepped portion formed on the inner wall of the oil cylinder cavity 101;

[0075] A second piston ring 302, which is radially sleeved on the stepped stage formed in the middle of the piston pull rod 301, and its outer wall surface abuts against the inner wall of the oil cylinder cavity 101. A brake fluid cavity is formed between the second piston ring 302 and the sealing ring 309, and the brake fluid cavity is communicated with the communication hole 103 and the oil outlet 104;

[0076] A plug base 306, which is threadedly assembled at the first opening end of the oil cylinder cavity 101 and tightly fixes the axial position of the sealing ring 309, and a first movable cavity is formed in the middle thereof;

[0077] The elastic member 305 has one end limitedly assembled in the hollow hole and the other end extending into the first movable cavity to provide elastic restoring force after the piston rod 301 moves;

[0078] The end cover plate 303 covers the second open end of the cylinder chamber 101 to limit the starting point of the stroke of the piston pull rod 301, and a second assembly hole 3031 is opened on it; Figure 4 The end cover plate 303 and the oil pool cover 205 are an integrally formed structure, which saves parts and reduces assembly processes.

[0079] The first end of the wire clip terminal 304 passes through the second assembly hole 3031 and is threadedly assembled with the second end of the piston rod, and a wire locking screw is provided on the wire clip terminal to fix the wire.

[0080] Continue to refer to the attached Figure 3 The line pull oil drive component 30 also includes:

[0081] A wire sleeve 308 is inserted into the plug base 306 to pass the pull wire;

[0082] The sealing screw sleeve 307 is threadedly assembled with the end of the plug base 306 away from the sealing ring 309 to fix the threading sleeve 308 and seal the first open end of the cylinder cavity 101.

[0083] In the technical solution of the above embodiment, when installed on a vehicle, a single wire-pull oil drive component 30 is used in conjunction with a brake handle and an oil pressure pump. Specifically, the first end of the wire is connected to the brake handle, and the second end passes through the hollow hole of the wire-pull oil drive component 30 and is fixed to the wire buckle terminal 304 through a locking screw; the first end of the oil pipe is connected to the oil outlet 104 through an oil pipe joint, and the second end is connected to the oil pressure pump assembled at the front / rear wheel of the bicycle frame;

[0084] When the brake handle is squeezed, the piston rod 301 is pulled by the pull wire and moves axially forward in the cylinder chamber 101, and drives the brake oil in the brake oil chamber to be discharged through the oil outlet 104 through the second piston ring 302, and then enters the oil pressure pump at the front / rear wheel through the oil pipe. The oil pressure pump clamps the disc of the front / rear wheel for oil pressure braking, the oil circuit is smooth, and the braking is stable.

[0085] For other structures not described, refer to Example 1.

[0086] In summary, for the oil pressure balance structure and the cable-operated oil pressure conversion pump provided in the embodiments of the present utility model, through the movable assembly of the piston body 201 in the oil sump cavity 102 and the stroke limitation by the oil sump cover 205, as the brake pads wear, during the braking process, the brake fluid in the oil sump cavity 102 automatically replenishes the oil cylinder cavity 101 with reduced pressure, and the piston body 201 moves in the direction of brake fluid output, thereby maintaining sufficient oil quantity in the brake system for braking; when the pump body 10 needs to be refilled, an oil injection tool is inserted into the oil injection side hole 204, the oil seal bolt 203 is unscrewed in the reverse direction along the thread, a liquid inlet channel is generated between the tapered bolt tail 2031 and the oil seal conical surface, and the liquid inlet channel is connected to the second end of the oil injection side hole 204. At this time, the injected brake fluid can directly enter the oil sump cavity 102, and no air will enter the braking system, realizing rapid brake fluid replenishment and ensuring the braking performance of the vehicle.

[0087] Embodiment 3

[0088] Embodiment 3 of the present application provides a vehicle having the oil pressure balance structure of Embodiment 1 above, or,

[0089] the cable-operated oil pressure conversion pump of Embodiment 2 above.

[0090] In this embodiment, the vehicle can be a two-wheeled bicycle, a two-wheeled electric bicycle, a two-wheeled motorcycle, a tricycle, an electric tricycle, a three-wheeled motorcycle, or other vehicles.

[0091] For other un-described structures, refer to Embodiment 1.

[0092] In summary, for the oil pressure balance structure, the cable-operated oil pressure conversion pump, and the vehicle provided in the embodiments of the present utility model, through the movable assembly of the piston body 201 in the oil sump cavity 102 and the stroke limitation by the oil sump cover 205, as the brake pads wear, during the braking process, the brake fluid in the oil sump cavity 102 automatically replenishes the oil cylinder cavity 101 with reduced pressure, and the piston body 201 moves in the direction of brake fluid output, thereby maintaining sufficient oil quantity in the brake system for braking; when the pump body 10 needs to be refilled, an oil injection tool is inserted into the oil injection side hole 204, the oil seal bolt 203 is unscrewed in the reverse direction along the thread, a liquid inlet channel is generated between the tapered bolt tail 2031 and the oil seal conical surface, and the liquid inlet channel is connected to the second end of the oil injection side hole 204. At this time, the injected brake fluid can directly enter the oil sump cavity 102, and no air will enter the braking system, realizing rapid brake fluid replenishment and ensuring the braking performance of the vehicle.

[0093] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0094] The above embodiments only represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An oil pressure balancing structure, used in conjunction with a pump body, characterized in that: The pump body is provided with: There is at least one oil cylinder cavity, which is opened on the pump body and is radially connected to an oil outlet; There is at least one oil pool cavity, which is opened on the pump body and communicates with the oil cylinder cavity through a connecting hole, and the oil pool cavity and the oil cylinder cavity contain brake oil; An oil pressure balance member is arranged in the oil pool cavity to replenish brake oil into the cylinder cavity when the brake is actuated to balance the brake oil pressure, and includes: a piston body, which is movably assembled in the oil pool cavity and is provided with an axially through-going fluid replenishment channel; an oil seal plug, wherein the middle portion thereof has an external thread section, and the external thread section is threadedly assembled with an internal thread surface formed on the inner wall of the fluid replenishment channel to seal the fluid replenishment channel; an oil pool cover, which is fixedly assembled on the open end of the oil pool cavity by screws, and the oil pool cover is provided with a first assembly hole connected to the external atmospheric pressure.

2. The oil pressure balancing structure according to claim 1, characterized in that: An oil seal conical surface is arranged in the inner cavity of the fluid replenishment channel, and a plug tail of the oil seal plug is formed with a conical plug tail which cooperates with the oil seal conical surface to seal the fluid replenishment channel.

3. The oil pressure balancing structure according to claim 2, characterized in that: The oil pressure balance member also includes: The oil filling edge hole is opened in the middle of the length of the oil seal plug, and its first end penetrates the bolt head of the oil seal plug, and its second end penetrates the annular side wall of the oil seal plug near the conical bolt tail.

4. The oil pressure balancing structure according to claim 1, characterized in that: The piston body is sleeved with a first piston ring, and the first piston ring is interference fit with the inner wall surface of the oil pool cavity.

5. The oil pressure balancing structure according to claim 1, characterized in that: The diameter of the first assembly hole is at least larger than the diameter of the plug head of the oil seal plug.

6. A line-pull oil pressure conversion pump, characterized in that: It has the oil pressure balancing structure according to any one of claims 1 to 5, and further comprises: The wire-pull oil driving component is arranged in the oil cylinder cavity to drive the brake oil in the oil cylinder cavity to be output from the oil outlet when the brake is actuated.

7. The wire-pull oil pressure conversion pump according to claim 6, characterized in that: The line-pulling oil drive component comprises: A piston pull rod is movably assembled in the oil cylinder cavity, and a hollow hole for passing a pull wire is axially opened in the middle thereof; A sealing ring, which is movably sleeved on the first end of the piston pull rod and limitedly assembled on the step portion formed on the inner wall of the cylinder cavity; A second piston ring is radially sleeved on a stage formed in the middle of the piston rod, and its outer wall surface abuts against the inner wall of the oil cylinder cavity, a brake oil cavity is formed between the second piston ring and the sealing ring, and the brake oil cavity is connected with the connecting hole and the oil outlet; A plug base, which is threadedly assembled on the first open end of the oil cylinder cavity and presses and fixes the axial position of the sealing ring, and a first movable cavity is opened in the middle thereof; An elastic member, one end of which is limitedly assembled in the hollow hole, and the other end of which extends into the first movable cavity to provide an elastic restoring force after the piston rod moves; An end cover plate, which covers the second open end of the oil cylinder cavity to limit the starting point of the stroke of the piston pull rod, and is provided with a second assembly hole; A wire clip terminal, the first end of which passes through the second assembly hole and is threadedly assembled with the second end of the piston pull rod, and a wire locking screw is provided on the wire clip terminal to fix the pull wire.

8. The wire-pull oil pressure conversion pump according to claim 7, characterized in that: The line-pulling oil drive component also includes: A wire-threading sleeve, which is inserted into the plug base to thread the pull wire; A sealing screw sleeve is threadedly assembled with an end of the plug base away from the sealing ring to fix the threading sleeve and seal the first open end of the cylinder cavity.

9. A vehicle, characterized in that: A hydraulic balance structure according to any one of claims 1 to 5, or The wire-pull oil pressure conversion pump as described in claim 6.

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