An oil injection device for a brake

Abstract

The application discloses an oil injection device for a brake, which comprises an oil cup body, a sealing member, and an oil pipe joint. The oil cup body comprises an oil storage cavity, an oil guide cavity and an access cavity which are communicated with each other. The oil cup body is provided with an oil inlet opening communicated with the oil storage cavity and an oil outlet opening arranged between the oil guide cavity and the access cavity. The sealing member is movably arranged in the oil guide cavity and is used for plugging the oil outlet opening. One end of the oil pipe joint is connected to an oil pipe / brake pump body, and the other end can enter the oil guide cavity after passing through the access cavity. The oil pipe joint separates the sealing member from the oil outlet opening, so that an oil conveying gap is formed between the sealing member and the oil outlet opening, and the oil pipe joint is connected to the oil cup body. The oil cup body is provided with an adsorption member which acts on the sealing member, so that the sealing member always has a movement tendency of moving towards the oil outlet opening.

Description

Technical Field

[0001] This utility model relates to the technical field of brake auxiliary equipment, and in particular to a brake oil injection device. Background Technology

[0002] Disc brakes consist of a brake disc connected to the wheel and brake calipers around the disc's edge. When braking, high-pressure brake fluid pushes brake pads to clamp the brake disc, thus producing a braking effect. Early disc brake systems were mostly used in motorcycles, but their high price and weight prevented their widespread adoption in bicycles. However, recent technological and material advancements have improved the weight and price of disc brake systems, leading to their increasing use on bicycles. As a type of hydraulic brake system, disc brakes connect the brake caliper and brake lever via hydraulic lines. Hydraulic fluid is guided from the brake lever to the brake caliper, causing it to clamp and complete the braking action. Therefore, hydraulic fluid, as the transmission medium, is undoubtedly one of the most important components of the brake system. Over time, the hydraulic fluid in the brake system becomes cloudy. Failure to replace it promptly can lead to a decrease in braking force and, in severe cases, corrosion of the brake system's piping. Therefore, disc brakes require regular fluid replacement and replenishment.

[0003] Adding oil to the braking system requires auxiliary tools. For an example of prior art, see patent document CN108019614A, which discloses a leak-proof screw-cap type oil cup, including a cap and a cup body. The cap is movably mounted on the cup body, and an oil pressure plate is provided on the cap, which can move up and down with the cap within the cup body. The diameter of the oil pressure plate is the same as the inner diameter of the cup body. The bottom of the cup body includes an oil outlet constriction, and an oil delivery pipe is fixedly connected to the oil outlet constriction. The present invention discloses a leak-proof screw-cap oil cup, which uses a threaded connection between the cap and the cup body. An oil pressure plate is fixed in a position relative to the cap inside the cup body, so that the oiling work is completed by adjusting the cap. This oiling method is time-saving and labor-saving. At the same time, in order to facilitate the filling of the oil storage chamber, an extended oil delivery pipe is also provided at the oil outlet constriction of the cup body, so that the oil storage chamber can be inserted into the object to be filled or the arc-shaped oil outlet can be aligned with the object to be filled, thereby avoiding oil leakage, reducing losses to a certain extent, and avoiding environmental pollution caused by leakage during oiling.

[0004] In summary, existing oil cups for filling oil require a spring to push the oil inlet valve ball against the inlet to achieve a self-sealing effect. The spring must overcome the weight of the valve ball to successfully push it up. However, with increased use, the spring fatigues, reducing its elasticity and preventing it from fully pushing the valve ball, thus causing the self-sealing function to fail. Furthermore, when the oil level in the cup is low, the pressure on the valve ball is insufficient to overcome the spring's elasticity and open the valve, preventing oil filling. This results in a significant waste of oil, with some remaining oil unused each time, and also makes cleaning more difficult. Summary of the Invention

[0005] To overcome the above-mentioned shortcomings of the prior art, this utility model provides a brake oil injection device.

[0006] The technical solution of this utility model to solve its technical problem is: a brake oil injection device, comprising:

[0007] The oil cup body includes an oil storage chamber, an oil guiding chamber, and an inlet chamber that are interconnected. The oil cup body has an oil filling port that communicates with the oil storage chamber and an oil outlet that is opened between the oil guiding chamber and the inlet chamber.

[0008] A sealing member, which is movably located in the oil guiding cavity, is used to block the oil outlet;

[0009] The oil pipe connector has one end connected to the oil pipe / brake pump body, and the other end can enter the oil guide chamber after passing through the inlet chamber. The oil pipe connector separates the sealing member from the oil outlet so that an oil delivery gap is formed between the sealing member and the oil outlet, so as to realize the docking of the oil pipe connector and the oil cup body.

[0010] An adsorption component is disposed in the oil cup body. The adsorption component acts on the sealing component so that the sealing component always has a tendency to move towards the oil outlet.

[0011] The above-mentioned structural design addresses the pain points of existing brake fluid filling devices through the following structural features: First, the sealing component is positioned above the oil outlet. During vertical use, its own weight automatically brings the sealing component close to and seals the oil outlet when no filling operation is being performed. Second, it has an adsorption component that constantly exerts force on the sealing component. Especially after the filling operation, when the sealing component is released, the adsorption component actively brings the sealing component close to and seals the oil outlet. Third, the oil cup body adopts a three-chamber structure (oil storage chamber, oil guiding chamber, and inlet chamber). The oil storage chamber stores a larger amount of brake fluid, the oil guiding chamber guides the flow of brake fluid during filling, and the inlet chamber is used to cooperate with the oil pipe connector to limit the oil pipe connector, thereby achieving a more stable and reliable filling effect.

[0012] It is worth mentioning that, due to the design of the adsorption component, even when the oil injection device is used in an inclined state, it can still act on the sealing component to bring it close to and block the oil outlet. On the other hand, under the combined force of gravity and the adsorption component, the sealing component can better reset and achieve a self-sealing function.

[0013] In some preferred embodiments of this utility model, the adsorption component is a magnet, the sealing component is a sealing ball, and the sealing ball is made of ferromagnetic material, and the magnet exerts a magnetic force on the sealing ball.

[0014] Preferably, the oil guiding cavity has an inverted conical inner wall, and the outer wall of the sealing ball can abut against the inverted conical inner wall to form a sealing fit.

[0015] Preferably, the magnet is ring-shaped, has a through hole for the oil pipe connector to pass through, and is fixed to the top wall of the access cavity.

[0016] In some preferred embodiments of this utility model, the end of the oil pipe joint has a plurality of slots, and when the end of the oil pipe joint abuts against the sealing member, a non-tight fit is formed between the slots and the sealing member.

[0017] The oil pipe joint has an oil delivery channel that runs through it, the groove is connected to the oil delivery channel, and the oil delivery channel can be connected to the oil delivery gap so that the oil guide chamber is connected to the oil pipe / brake pump body.

[0018] In some preferred embodiments of this utility model, a plurality of sealing grooves are provided on the outer wall of the oil pipe joint, and a sealing ring is provided in the sealing groove; when the oil pipe joint is connected to the oil cup body, the sealing ring is located in the access cavity, and the inner wall of the access cavity forms a sealing fit with the outer wall of the oil pipe joint through the sealing ring.

[0019] In some preferred embodiments of this utility model, a limiting groove is formed on the inner wall of the oil guide cavity, and a limiting member is provided in the limiting groove. The limiting member extends at least partially outside the limiting groove, and the limiting member can abut against the sealing member and form a limiting fit.

[0020] Furthermore, the limiting member is a metal ring, and the inner diameter of the metal ring is smaller than the outer diameter of the sealing member.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. The sealing component is placed above the oil outlet. During vertical use, when no oil filling operation is performed, the sealing component will automatically come into contact with and block the oil outlet by its own weight.

[0023] Second, it has an adsorption component that always exerts force on the sealing component. Especially after the oil injection operation, when the sealing component is released, the adsorption component can actively bring the sealing component close to and block the oil outlet.

[0024] Third, the brake fluid cup body adopts a three-chamber structure (storage chamber, guide chamber, and inlet chamber). The storage chamber is used to store a larger amount of brake fluid, the guide chamber is used to guide the flow of brake fluid during injection, and the inlet chamber is used to cooperate with the brake hose connector to limit the brake hose connector and obtain a more stable and reliable injection effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is an exploded view of this utility model.

[0027] Figure 3 This is a cross-sectional view of the present invention during oil injection.

[0028] Figure 4 yes Figure 3 A magnified schematic diagram of a portion of the structure in section A.

[0029] Figure 5 This is a cross-sectional view of the present invention when it is not being oiled.

[0030] Figure 6 yes Figure 5 A magnified schematic diagram of a local structure in section B.

[0031] Figure 7 This is a schematic diagram of the upper structure of the oil cup body.

[0032] Figure 8 This is a schematic diagram of the lower structure of the oil cup body.

[0033] Figure 9 This is a schematic diagram of the oil pipe joint.

[0034] In the diagram: 1. Oil cup body; 11. Oil storage chamber; 12. Oil guide chamber; 121. Inverted cone inner wall; 122. Limiting groove; 13. Inlet chamber; 14. Oil filling port; 15. Oil outlet; 151. Oil delivery gap; 2. Sealing component; 2D. Outer diameter of sealing component; 3. Oil pipe joint; 31. Oil delivery channel; 32. Groove opening; 33. Sealing groove; 4. Adsorption component; 41. Through hole; 5. Limiting component; 5D. Inner diameter of metal ring; 6. Sealing ring. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific descriptions of the present invention, and their purpose is to enable those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limitations on the present invention.

[0036] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] Example 1

[0039] Reference Figures 1-9 A brake fluid injection device, comprising:

[0040] Oil cup body 1, refer to Figures 7-8 It includes an oil storage chamber 11, an oil guiding chamber 12 and an inlet chamber 13 that are interconnected. The oil cup body 1 has an oil filling port 14 that communicates with the oil storage chamber 11 and an oil outlet 15 that is opened between the oil guiding chamber 12 and the inlet chamber 13. Preferably, the oil storage chamber 11, the oil guiding chamber 12 and the inlet chamber 13 are arranged in order from top to bottom.

[0041] A sealing member 2 is movably located in the oil guiding cavity 12, and the sealing member 2 is used to block the oil outlet 15;

[0042] The oil pipe connector 3 has one end connected to the oil pipe / brake pump body, and the other end can enter the oil guide chamber 12 after passing through the inlet chamber 13. The oil pipe connector 3 separates the sealing member 2 from the oil outlet 15 so that an oil delivery gap 151 is formed between the sealing member 2 and the oil outlet 15, thereby realizing the docking of the oil pipe connector 3 with the oil cup body 1.

[0043] The adsorption component 4 is disposed in the oil cup body 1. The adsorption component 4 acts on the sealing component 2 so that the sealing component 2 always has a tendency to move toward the oil outlet 15.

[0044] The above-mentioned structural solution solves the pain points of existing oil filling devices, specifically through the following structural features: First, the sealing component 2 is placed above the oil outlet 15. During vertical use, when no oil filling operation is performed, its own weight allows the sealing component 2 to automatically approach and block the oil outlet 15. Second, it has an adsorption component 4, which always exerts force on the sealing component 2. Especially after the oil filling operation, when the sealing component 2 is released, the adsorption component 4 can actively bring the sealing component 2 close to and block the oil outlet 15. Third, the oil cup body 1 adopts a three-chamber structure (oil storage chamber 11, oil guiding chamber 12, and inlet chamber 13). The oil storage chamber 11 is used to store a larger amount of brake fluid, the oil guiding chamber 12 is used to guide the flow of brake fluid during oil filling, and the inlet chamber 13 is used to cooperate with the oil pipe connector 3 to limit the oil pipe connector 3, thereby obtaining a more stable and reliable oil filling effect.

[0045] It is worth mentioning that, due to the adsorption component 4, even when the oil injection device is used in an inclined state, it can still act on the sealing component 2 to bring the sealing component 2 close to and block the oil outlet 15. On the other hand, under the combined force of gravity and the adsorption component 4, the sealing component 2 can better reset and achieve a self-sealing function.

[0046] In a preferred embodiment, the adsorption component 4 is a magnet, and the sealing component 2 is a sealing ball made of ferromagnetic material. The magnet exerts a magnetic force on the sealing ball. Compared with the spring reset force, the magnetic force has the following significant advantages in terms of structural characteristics, performance, and application scenarios: First, it has no mechanical wear and a longer lifespan; second, it has stronger environmental adaptability and is not affected by brake fluid quality (e.g., viscosity) or temperature; third, it has a compact structure and more flexible space design; fourth, it provides contactless reset, suitable for high-cleanliness or precision scenarios; fifth, it has a fast response speed and better dynamic performance; and sixth, it has low maintenance costs and high reliability.

[0047] Preferably, refer to Figure 4 , Figure 6 The oil guiding cavity 12 has an inverted conical inner wall 121, and the outer wall of the sealing ball can abut against the inverted conical inner wall 121 to form a sealing fit. Through the fit between the sealing ball and the inverted conical inner wall 121, a line contact seal is achieved, resulting in a high sealing specific pressure. Compared with the surface contact of a planar seal, the contact pressure is more concentrated under the same load. This structure achieves high sealing pressure with relatively small preload (such as gravity, fluid pressure, or spring force), effectively blocking fluid leakage, and is especially suitable for high-pressure, high-vacuum, or high-medium media sealing requirements. Secondly, it adaptively compensates for wear, and the contact point between the ball and the conical surface can automatically adjust its position as wear occurs: when the sealing surface experiences slight wear due to long-term use, the ball will move slightly towards the bottom of the cone under pressure, reforming a new contact line, maintaining the sealing effect, and extending service life. Thirdly, geometric symmetry enables automatic centering. The spherical structure has 360° symmetry, and the conical guide effect of the inverted inner wall 121 allows the ball to automatically position itself at the center, achieving coaxiality with the cone axis without precise calibration. No strict alignment is required during installation, reducing assembly difficulty, making it especially suitable for quick installation or space-constrained scenarios; fourth, it has strong resistance to off-center loads. Even with slight eccentricity during installation or under stress, the ball can adjust its position through rolling or sliding to ensure uniform contact with the conical surface, avoiding localized leakage caused by off-center loads; fifth, it has good dynamic sealing stability. Under fluid fluctuations or vibration conditions, the rolling characteristics of the ball can buffer instantaneous impacts and reduce rigid wear on the sealing surface. For example, during valve opening and closing, the low coefficient of sliding friction between the ball and the conical surface makes the movement more flexible and less prone to sealing failure due to jamming; sixth, the streamlined structure reduces impurity accumulation. The combination of the spherical shape and the conical surface forms a smooth fluid channel, making it less likely for impurities (such as particles and deposits) to remain on the sealing surface as the fluid flows. Even if a small amount of impurities adhere, the fluid pressure will push the ball to roll, removing the impurities through friction or flushing, reducing the risk of blockage. It also conforms to the design without dead angles, with no sharp edges or grooves in the contact area between the inner wall of the cone and the ball, avoiding corrosion or sealing failure caused by media deposition; seventh, it has fewer parts, lower manufacturing and installation costs, convenient maintenance, and high replacement efficiency.

[0048] To accommodate the use of the oil pipe connector 3, the magnet is preferably annular, and has a through hole 41 through which the oil pipe connector 3 passes. The magnet is fixed to the top wall of the access cavity 13. The oil pipe connector 3 has an oil delivery channel 31 that extends through it, and this channel 31 communicates with the oil delivery gap 151, allowing the oil guide cavity 12 to communicate with the oil pipe / brake pump body. Furthermore, the slot 32 communicates with the oil delivery channel 31 to prevent impurities from clogging the oil delivery gap 151, ensuring that brake fluid can enter the oil delivery channel 31 through the slot 32.

[0049] If a tight fit is formed between the oil pipe joint 3 and the sealing member 2, a large force (negative pressure) will be generated between them, making it difficult for the user to perform the separation operation. To address the above-mentioned defects, in some preferred embodiments of this utility model, referring to... Figure 9 The end of the oil pipe connector 3 has several slots 32. When the end of the oil pipe connector 3 abuts against the sealing member 2, the slots 32 and the sealing member 2 form a non-tight fit, so that the oil pipe connector 3 can be easily separated from the oil cup body 1 after the oil is injected.

[0050] In some preferred embodiments of this utility model, reference is made to Figure 4 , Figure 6 , Figure 9 The outer wall of the oil pipe connector 3 is provided with several sealing grooves 33, and sealing rings 6 are installed in the sealing grooves 33. When the oil pipe connector 3 is connected to the oil cup body 1, the sealing rings 6 are located in the inlet cavity 13, and the inner wall of the inlet cavity 13 forms a sealing fit with the outer wall of the oil pipe connector 3 through the sealing rings 6. During the oil injection process, the sealing rings 6 ensure the accuracy of the oil injection operation, the purity of the system medium, and the safety of equipment operation through the triple functions of physical sealing, pressure maintenance, and contamination prevention. Its essence is to fill the interface gap through the deformation of the elastic element, confining the liquid (oil) in a closed space to meet the strict sealing requirements of hydraulic, lubrication and other systems. If the seal fails, it may cause a series of problems such as leakage, insufficient pressure, contamination, and safety hazards. Therefore, it is a critical link that cannot be ignored in oil circuit connection.

[0051] Example 2

[0052] Based on the structure of Embodiment 1, especially when the sealing member 2 separates from the oil outlet 15, in order to prevent the sealing member 2 from moving excessively and failing to reset properly, the preferred structural scheme adopted is as follows: Refer to Figures 3-6 The inner wall of the oil guide cavity 12 is provided with a limiting groove 122, and a limiting member 5 is provided in the limiting groove 122. The limiting member 5 extends at least partially out of the limiting groove 122, and the limiting member 5 can abut against the sealing member 2 and form a limiting fit.

[0053] The limiting groove 122 and the limiting component 5 provide full-cycle support for the sealing component 2 in terms of installation positioning, stable operation, and life protection through mechanical constraints, fixed position, and load sharing. Essentially, it compensates for the shortcomings of the sealing component 2 in resisting displacement and deformation through a rigid structure, upgrading the "sealing fit" from simple elastic contact to a composite system of "elastic sealing and mechanical limiting," ultimately improving the reliability and safety of the oil circuit system under complex operating conditions such as pressure, vibration, and temperature.

[0054] Furthermore, the limiting member 5 is a metal ring, and the inner diameter 5D of the metal ring is smaller than the outer diameter of the sealing member 2, ensuring that the sealing member 2 will not pass through the metal ring as a whole, so as to play an effective limiting role.

[0055] It is worth noting that the other technical solutions of this utility model are all existing technologies, and therefore will not be described in detail.

[0056] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A brake fluid injection device, characterized in that, Including: The oil cup body (1) includes an oil storage chamber (11), an oil guiding chamber (12) and an inlet chamber (13) that are interconnected. The oil cup body (1) has an oil filling port (14) that communicates with the oil storage chamber (11) and an oil outlet (15) that is opened between the oil guiding chamber (12) and the inlet chamber (13). A sealing member (2) is movably located in the oil guide cavity (12), and the sealing member (2) is used to block the oil outlet (15); The oil pipe connector (3) has one end connected to the oil pipe / brake pump body and the other end can enter the oil guide chamber (12) after passing through the inlet chamber (13). The oil pipe connector (3) separates the sealing member (2) from the oil outlet (15) so that an oil delivery gap (151) is formed between the sealing member (2) and the oil outlet (15), thereby realizing the connection between the oil pipe connector (3) and the oil cup body (1). An adsorption component (4) is disposed in the oil cup body (1). The adsorption component (4) acts on the sealing component (2) so that the sealing component (2) always has a tendency to move toward the oil outlet (15).

2. The brake oil injection device according to claim 1, characterized in that: The adsorption component (4) is a magnet, the sealing component (2) is a sealing ball, and the sealing ball is made of ferromagnetic material. The magnet exerts a magnetic force on the sealing ball.

3. The brake oil injection device according to claim 2, characterized in that: The oil guide cavity (12) has an inverted conical inner wall (121), and the outer wall of the sealing ball can abut against the inverted conical inner wall (121) to form a sealing fit.

4. The brake oil injection device according to claim 2, characterized in that: The magnet is ring-shaped and has a through hole (41) through which the oil pipe connector (3) passes, and the magnet is fixed to the top wall of the access cavity (13).

5. The brake oil injection device according to claim 1, characterized in that: The end of the oil pipe joint (3) has several slots (32). When the end of the oil pipe joint (3) abuts against the sealing member (2), a non-tight fit is formed between the slots (32) and the sealing member (2).

6. The brake oil injection device according to claim 5, characterized in that: The oil pipe joint (3) has an oil delivery channel (31) that runs through it. The slot (32) is connected to the oil delivery channel (31). The oil delivery channel (31) can be connected to the oil delivery gap (151) so that the oil guide cavity (12) is connected to the oil pipe / brake pump body.

7. The brake oil injection device according to claim 1, characterized in that: The outer wall of the oil pipe joint (3) is provided with a plurality of sealing grooves (33), and a sealing ring (6) is provided in the sealing groove (33); when the oil pipe joint (3) is connected to the oil cup body (1), the sealing ring (6) is located in the access cavity (13), and the inner wall of the access cavity (13) forms a sealing fit with the outer wall of the oil pipe joint (3) through the sealing ring (6).

8. The brake oil injection device according to claim 1, characterized in that: A limiting groove (122) is provided on the inner wall of the oil guide cavity (12), and a limiting member (5) is provided in the limiting groove (122). The limiting member (5) extends at least partially out of the limiting groove (122), and the limiting member (5) can abut against the sealing member (2) and form a limiting fit.

9. The brake oil injection device according to claim 8, characterized in that: The limiting member (5) is a metal ring, and the inner diameter (5D) of the metal ring is smaller than the outer diameter of the sealing member (2).

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