Brake master cylinder, brake device and vehicle

Abstract

The embodiments of the present application disclose a brake master cylinder, a brake device and a vehicle. The brake master cylinder comprises a master cylinder body, a piston and a push rod assembly, wherein the master cylinder body comprises a cylinder body; the piston is arranged in the cylinder body; and the push rod assembly comprises an input rod, one end of the input rod extends into the cylinder body and is connected to the piston, an elastic element is sleeved on the section of the input rod located on the outside of the cylinder body, and the elastic element abuts against the main cylinder body.

Description

Brake master cylinder, brake device and vehicle

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202420846170.0, filed on April 18, 2024, and entitled "Brake master cylinder, brake device and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the technical field of vehicles, and in particular, the present application relates to a brake master cylinder, a brake device and a vehicle. BACKGROUND

[0004] In existing automobile brake systems, the brake master cylinder is a key component that converts the pedal force of the driver into, for example, hydraulic energy to drive the brake device to achieve the vehicle braking function. However, the traditional brake master cylinder design has some deficiencies in practical application. First, in the traditional brake master cylinder, due to the rigid connection between the input rod and the master cylinder body, the impact force generated during braking will directly act on the brake device, which not only may affect the stability of the brake device, but also may adversely affect the ride comfort of the driver and passengers. Second, long-term use and frequent braking operations may cause loosening or wear of some connection parts inside the brake master cylinder, which not only may reduce the braking effect, but also may increase the failure rate and affect the driving safety.

[0005] Therefore, it is a technical problem to be solved in the current automobile brake system technical field to design a new type of brake master cylinder that can not only solve the above problems, but also ensure the stability and reliability of the brake device.

[0006] Practical new type

[0007] The purpose of the present application is to provide a new technical solution for a brake master cylinder, a brake device and a vehicle.

[0008] According to a first aspect of the present application, a brake master cylinder is provided, comprising:

[0009] a master cylinder body comprising a cylinder body;

[0010] a piston arranged in the cylinder body;

[0011] a push rod assembly comprising an input rod, one end of the input rod extending into the cylinder body and being connected with the piston, an elastic element being sleeved on a section of the input rod outside the cylinder body, and the elastic element abutting against the master cylinder body.

[0012] Optionally, the push rod assembly comprises an anti-extraction sleeve, one end of the input rod is rotationally connected with the anti-extraction sleeve, and the anti-extraction sleeve is arranged in the cylinder body and connected with the piston.

[0013] Optionally, one end of the input rod is provided with a spherical body.

[0014] The anti-extraction sleeve is provided with a spherical groove matched with the spherical body.

[0015] The spherical body and the spherical groove form a spherical hinge, and the spherical body can rotate in the spherical groove.

[0016] Optionally, a riveting structure is arranged around the side of the groove of the spherical groove, and the riveting structure is used to limit the spherical body from being extracted from the spherical groove.

[0017] Optionally, the riveting structure comprises a plurality of riveting blocks arranged at intervals, and the plurality of riveting blocks enclose a conical space to lock the spherical body in the spherical groove.

[0018] Optionally, the riveting blocks are four, and the four riveting blocks are equally angularly spaced around the side of the groove of the spherical groove.

[0019] Optionally, the anti-extraction sleeve is provided with an oil storage cavity, and the oil storage cavity is in communication with the spherical groove.

[0020] The oil storage cavity is used to fill lubricant.

[0021] Optionally, the oil storage cavity is located at the bottom of the spherical groove, and the oil storage cavity is inverted conical.

[0022] Optionally, one end of the anti-extraction sleeve away from the riveting structure is provided with a connecting structure.

[0023] The piston is provided with a connecting hole matched with the connecting structure.

[0024] The connecting structure is inserted into the connecting hole, and the connecting structure and the connecting hole are in interference fit.

[0025] Optionally, the master cylinder body further comprises a limiting cover, and the limiting cover covers one side of the cylinder body.

[0026] The limiting cover is provided with a cavity, and part of the piston is located in the cavity.

[0027] Optionally, one end of the input rod away from the limiting cover is provided with a stop structure.

[0028] The elastic element is located between the stop structure and the limiting cover.

[0029] Optionally, the limiting cap is provided with a limiting structure which forms a limiting cooperation with the stop structure, and the stop structure and the limiting structure are oppositely arranged.

[0030] One end of the elastic element is in abutment with the stop structure, and the other end is in abutment with the limiting structure.

[0031] Optionally, the stop structure is a ring-shaped baffle which extends outward along the radial direction of the input rod.

[0032] Optionally, the limiting cap has an open end, and the limiting cap comprises a top wall and a side wall connected with the top wall, wherein the top wall is opposite to the open end.

[0033] The top wall is provided with an opening through which the input rod extends, and the limiting structure is annularly arranged on the periphery of the opening.

[0034] The side wall is bent to form a connecting portion near one side of the open end, and the connecting portion is connected with the cylinder body.

[0035] Optionally, the limiting structure is a ring-shaped recessed structure or a ring-shaped protruding structure.

[0036] Optionally, the input rod extends outward to form an extension section away from the spherical body.

[0037] The extension section is connected with the adjusting rod in a threaded manner.

[0038] According to a second aspect of the present application, a brake device is provided, which comprises:

[0039] The brake master cylinder according to the first aspect.

[0040] According to a third aspect of the present application, a vehicle is provided, which comprises:

[0041] a vehicle body; and

[0042] The brake device according to the second aspect.

[0043] One beneficial effect of the embodiments of the present application is that:

[0044] According to the above technical solutions provided by the embodiments of the present application, the elastic element is sleeved on the input rod at a set position, so that the buffering and resetting functions of the brake force are achieved. In the braking process of the brake master cylinder provided by the embodiments of the present application, the elastic element can effectively buffer the impact force transmitted by the input rod, thereby reducing the influence on the brake master cylinder and even the whole brake device. At the same time, the elastic element can ensure the accurate resetting of the input rod after braking, thereby improving the reliability of the brake master cylinder.

[0045] Other features and advantages of the present application will become apparent from the following detailed description of illustrative embodiments thereof, which proceeds with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the following description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0047] Fig. 1 is a sectional view of a brake master cylinder provided by an embodiment of the present application;

[0048] Fig. 2 is a structural schematic view of an input rod of the brake master cylinder provided by an embodiment of the present application;

[0049] Fig. 3 is a structural schematic view of an anti-disengagement sleeve of the brake master cylinder provided by an embodiment of the present application;

[0050] Fig. 4 is another structural schematic view of the anti-disengagement sleeve of the brake master cylinder provided by an embodiment of the present application;

[0051] Fig. 5 is a structural schematic view of a limiting cap of the brake master cylinder provided by an embodiment of the present application;

[0052] Fig. 6 is another structural schematic view of the limiting cap of the brake master cylinder provided by an embodiment of the present application;

[0053] Fig. 7 is a schematic block diagram of a master cylinder of the brake master cylinder provided by an embodiment of the present application;

[0054] Fig. 8 is a schematic block diagram of a brake device provided by an embodiment of the present application;

[0055] Fig. 9 is a schematic block diagram of a vehicle provided by an embodiment of the present application.

[0056] Legend of reference signs: 100, brake master cylinder; 1, adjusting rod; 2, elastic element; 3, limiting cap; 30, cavity; 31, limiting structure; 32, top wall; 320, opening; 33, side wall; 330, connecting part; 34, open end; 40, master cylinder body; 4, cylinder body; 50, push rod assembly; 5, input rod; 51, stop structure; 510, annular baffle; 52, spherical body; 53, extension section; 6, anti-disengagement sleeve; 61, riveting structure; 610, riveting block; 62, connecting structure; 63, spherical groove; 64, oil storage cavity; 7, piston; 70, connecting hole; 200, brake device; 300, vehicle; 301, vehicle body. DETAILED DESCRIPTION

[0057] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement of the components and steps illustrated in these embodiments, numerical expressions, and numerical values are merely meant to be illustrative, not limiting the scope of the present application.

[0058] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the scope of the application or its application or uses.

[0059] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0060] In all of the examples shown and discussed herein, any specific values should be interpreted as merely illustrative, and not as a limitation. Other examples of the exemplary embodiments can have different values.

[0061] Note that like reference numerals and letters indicate like items in the accompanying drawings and, as such, no further discussion will be provided regarding such items.

[0062] The brake master cylinder, brake device and vehicle provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0063] According to an aspect of the present application, a brake master cylinder 100 is provided, which can be applied to a brake device 200. The brake device 200, also known as a brake system, is a key part of a vehicle or other means of transportation for deceleration or parking. The brake device 200 is crucial to the safety and maneuverability of the vehicle 300. It needs to respond quickly and reliably when the driver is decelerating or parking, and remain stable under various road conditions and driving conditions.

[0064] The brake master cylinder 100 provided by the embodiments of the present application, as shown in FIG. 1, comprises a master cylinder body 40, a piston 7 and a push rod assembly 50. The master cylinder body 40 comprises a cylinder body 4. The piston 7 is arranged in the cylinder body 4. The push rod assembly 50 comprises an input rod 5, one end of which extends into the cylinder body 4 and is connected to the piston 7. An elastic element 2 is sleeved on a section of the input rod 5 outside the cylinder body 4, and the elastic element 2 abuts against the master cylinder body 40.

[0065] According to the brake master cylinder 100 provided by the embodiment of the present application, the structure is innovatively designed. The brake master cylinder 100 is mainly composed of a master cylinder body 40, a piston 7 and a push rod assembly 50. As shown in FIG. 7, the master cylinder body 40 serves as the basic structure of the entire brake master cylinder 100 and includes a cylinder body 4 for accommodating the piston 7 and serving as a medium for hydraulic transmission. The piston 7 is arranged in the cylinder body 4 and moves to compress or release the liquid in the cylinder body, thereby realizing the transmission of braking force.

[0066] The push rod assembly 50 is a key part of the entire brake master cylinder 100 and is responsible for converting the pedal force of the driver into the linear motion of the piston 7. One end of the input rod 5 in the push rod assembly 50 extends into the cylinder body 4 and is connected with the piston 7, thereby ensuring that the pedal force can be effectively transmitted to the piston 7.

[0067] The input rod 5 is particularly sleeved with an elastic element 2 on the section outside the cylinder body 4, and the elastic element 2 abuts against the master cylinder body 40. This design enables the elastic element 2 to effectively resist the thrust of the input rod 5 generated during braking, thereby realizing the precise and stable reset function. This design not only improves the performance of the brake master cylinder 100, but also ensures the accuracy and reliability of the braking operation.

[0068] The elastic element 2 is an element that can deform under external force and restore to the original state after the external force disappears, such as a spring.

[0069] The elastic element 2 can be a spring with the same diameter.

[0070] Of course, the elastic element 2 can also be a variable-diameter spring as shown in FIG. 1. Specifically, referring to FIG. 1, one end of the elastic element 2 away from the cylinder body 4 is a small-diameter end, and the other end close to the cylinder body 4 is a large-diameter end. The diameter of the elastic element 2 gradually increases. The design shown in FIG. 1 can improve the stability of the elastic element 2 when compressed and reset along the axial direction.

[0071] The brake master cylinder 100 provided by the embodiment of the present application is provided with the elastic element 2 on the section of the input rod 5 outside the master cylinder body 40, and the elastic element 2 can also have the following specific effects:

[0072] (1) The elastic element 2 abuts against the master cylinder body 40 closely, thereby ensuring the stability of the brake master cylinder 100 during long-term use, reducing damage caused by vibration or impact, and prolonging the service life.

[0073] (2) When the input rod 5 is subjected to external force and deviates from its original position, the elastic element 2 can use its elastic force to pull the input rod 5 back to the original position, ensuring that the brake master cylinder 100 can return to the initial state after each operation and be ready for the next brake operation.

[0074] (3) The elastic element 2 can absorb and alleviate the impact and vibration that may occur during the operation of the input rod 5. During braking, the input rod 5 may be subjected to impact from the driver or other external factors, and the elastic element 2 can effectively reduce the impact on the internal structure of the brake master cylinder 100, thereby improving the stability and service life of the brake master cylinder 100.

[0075] (4) Isolate vibration. The vehicle 300 may generate some vibrations during operation, and the elastic element 2 can absorb these vibrations to reduce the impact of vibrations on the driver and other components of the vehicle 300 brake device 200.

[0076] In addition, by reasonably designing the stiffness and pre-tightening force of the elastic element 2, the response characteristics and operation feel of the input rod 5 can be adjusted, so that the operation of the brake master cylinder 100 is more smooth and comfortable, and the driving experience is improved.

[0077] In some examples of the present application, referring to FIG. 1, the push rod assembly 50 includes a anti-off sleeve 6, one end of the input rod 5 is rotatably connected with the anti-off sleeve 6, and the anti-off sleeve 6 is arranged in the cylinder body 4 and connected with the piston 7.

[0078] Referring to FIG. 1, the push rod assembly 50 includes an input rod 5 and an anti-off sleeve 6. One end of the input rod 5 is rotatably connected with the anti-off sleeve 6, and this connection allows the input rod 5 to rotate relative to the anti-off sleeve 6 when subjected to external force, rather than directly impacting the piston 7. The anti-off sleeve 6 is located inside the cylinder body 4 and is directly connected with the piston 7, thereby ensuring that the piston 7 can move accordingly with the rotation or movement of the input rod 5.

[0079] The technical effect brought by the structural design of the brake master cylinder 100 provided in the embodiments of the present application is remarkable. First, through the rotational connection between the input rod 5 and the anti-disengagement sleeve 6, when the input rod 5 is subjected to external force, the input rod 5 can be buffered through rotation, effectively reducing the direct impact of external force on the piston 7, thereby improving the durability and safety of the brake master cylinder 100. Second, since the piston 7 is connected with the anti-disengagement sleeve 6, it is ensured that the piston 7 can accurately respond to the action of the input rod 5, and the normal work of the entire brake master cylinder 100 is ensured. In general, this design not only improves the durability and safety of the brake master cylinder 100, but also ensures the normal work of the brake master cylinder 100, which has a positive significance for improving the braking performance of the vehicle 300.

[0080] According to some examples of the present application, referring to FIGS. 1 and 2, one end of the input rod 5 is provided with a spherical body 52; the anti-disengagement sleeve 6 is provided with a spherical groove 63 matched with the spherical body 52; the spherical body 52 and the spherical groove 63 form a spherical hinge, and the spherical body 52 can rotate in the spherical groove 63.

[0081] Specifically, referring to FIGS. 1 and 2, one end of the input rod 5 is provided with a spherical body 52, and the inside of the anti-disengagement sleeve 6 is provided with a spherical groove 63 matched with the spherical body 52. The design of these two components allows the spherical body 52 to be embedded in the spherical groove 63 and form a spherical hinge.

[0082] It should be noted that the spherical hinge is a special mechanical connection method, which allows two components to rotate at multiple angles at the connection point. In the embodiments of the present application, this connection method allows the spherical body 52 of the input rod 5 to rotate freely in the spherical groove 63 when subjected to external force, instead of directly impacting the piston 7.

[0083] The anti-disengagement sleeve 6 is sleeved on one end of the input rod 5, specifically on the spherical body 52, and the anti-disengagement sleeve 6 is used to prevent the input rod 5 from accidentally disengaging from its proper position or path during force transmission or movement, to ensure the safety of the vehicle 300 in operation. That is, one of the main functions of the anti-disengagement sleeve 6 is to prevent the input rod 5 from accidentally falling out of the related components or holes during braking. Once the input rod 5 falls out, the entire vehicle 300 braking device 200 will not work normally, which may cause serious safety problems.

[0084] In addition, the anti-disengagement sleeve 6 can provide additional fixation and support for the input rod 5 to ensure that the input rod 5 is always in the correct position. The anti-disengagement sleeve 6 can also reduce the impact of vibration and impact on the input rod 5 to some extent, which can absorb part of the vibration energy, thereby reducing the wear and damage between the input rod 5 and related components.

[0085] The structure design of the push rod assembly 50 provided by the examples of the present application first makes the connection between the input rod 5 and the anti-disengagement sleeve 6 more flexible through the design of the spherical hinge, which can effectively buffer the impact of the input rod 5 when subjected to external force, thereby protecting the piston 7 from damage and improving the durability of the brake master cylinder 100. Second, the spherical hinge allows the input rod 5 to rotate in multiple directions, which enables the brake master cylinder 100 to adapt to more complex operating environments and improves the reliability and stability of the brake system.

[0086] In some examples of the present application, referring to FIGS. 1, 3 and 4, the ball-shaped groove 63 is annularly provided with a riveting structure 61 on the side of the slot opening, which can be used to limit the ball 52 from being disengaged from the ball-shaped groove 63.

[0087] Referring to FIGS. 3 and 4, the anti-disengagement sleeve 6, for example, includes a housing in which a ball-shaped groove 63 is provided, and a riveting structure 61 is annularly provided on the housing and on the side of the slot opening of the ball-shaped groove 63. The riveting structure 61 is mainly used to reduce the size of the slot opening and / or change the shape of the slot opening to ensure that the ball 52 installed in the ball-shaped groove 63 will not accidentally slip out. It can also be understood that the ball-shaped groove 63 forms a mechanical lock for the ball 52 through the riveting structure 61 on the side of the slot opening, so that the input rod 5 will not slip out.

[0088] That is, by designing the riveting structure 61 on the side of the slot opening of the ball-shaped groove 63, the slot opening can form a constricted shape, which allows the ball 52 to remain in the ball-shaped groove 63 when subjected to external force.

[0089] It should be noted that the riveting structure 61 is achieved by applying pressure or using a specific fixing method on the side of the slot opening of the ball-shaped groove 63. The specific design of the riveting structure 61 can vary depending on the application. For example, the riveting structure 61 is a protruding part formed on the side of the slot opening of the ball-shaped groove 63, which can form a limiting fit with the ball 52 to limit the ball 52 from slipping out.

[0090] In some examples of the present application, referring to FIG. 3, the riveting structure 61 comprises a plurality of riveting blocks 610 arranged at intervals, and the plurality of riveting blocks 610 enclose a conical space capable of locking the spherical body 52 in the spherical groove 63.

[0091] Specifically, the rim of the spherical groove 63 is provided with a riveting station (not shown in FIG. 3); the riveting structure 61 comprises a plurality of riveting blocks 610 riveted to the riveting station, and the plurality of riveting blocks 610 enclose a conical space capable of locking the spherical body 52 in the spherical groove 63.

[0092] That is, the riveting structure 61 can be composed of a plurality of riveting blocks 610 arranged at intervals and surrounding the rim of the spherical groove 63 to form a ring structure to limit the spherical body 52 of the input rod 5. Each riveting block 610 is an independent unit, and the intervals between them can allow the spherical body 52 to have a certain space of movement in the rim of the spherical groove 63, while effectively limiting the sliding out of the spherical body 52 through the conical surrounding structure. This design can provide uniform support and limitation in different directions, thereby preventing the spherical body 52 from falling out of the rim when subjected to external force. Finally, the stability and reliability of the braking device 200 of the vehicle 300 are improved.

[0093] In some examples of the present application, referring to FIG. 3, the riveting blocks 610 can be provided as four, and the four riveting blocks 610 are equally spaced around the rim of the spherical groove 63.

[0094] It should be noted that the number and shape of the riveting blocks 610 can be adjusted and designed according to specific needs. The number of riveting blocks 610 in the present application includes but is not limited to the four in the above examples.

[0095] Increasing the number of riveting blocks 610 can improve the stability and strength of the structure, but at the same time it will increase the complexity and cost of manufacturing. Therefore, the riveting structure 61 in the present application is designed to consist of four riveting blocks 610, which takes into account the complexity and cost of manufacturing, and achieves the best structural stability and strength.

[0096] In addition, the riveting blocks 610 may, for example, be made of the same material as the rim of the spherical groove 63 to ensure good fit and connection between them. At the same time, the material of the riveting blocks 610 should have sufficient strength and corrosion resistance to withstand the challenges of the working environment.

[0097] In some examples of the present application, referring to FIG. 4, an oil storage cavity 64 is further arranged in the anti-disengagement sleeve 6, which is in communication with the spherical groove 63; the oil storage cavity 64 is used to fill lubricant.

[0098] Referring to FIG. 1, the spherical body 52 at one end of the input rod 5 forms a spherical hinge with the spherical groove 63 in the anti-disengagement sleeve 6, and the spherical body 52 can rotate in the spherical groove 63. When the oil storage cavity 64 is filled with lubricant, the spherical body 52 can directly contact the lubricant in the oil storage cavity 64. The lubricant can provide lubrication to the spherical body 52, thereby reducing friction and wear, and also reducing the noise generated when the spherical body 52 rotates.

[0099] It should be noted that the lubricant can be liquid lubricating oil or solid lubricating grease, etc.

[0100] The specific form of the lubricant should be selected according to the material of the spherical body 52 of the input rod 5, the working environment, the temperature range, the load condition and other factors. The lubricant should have good lubricating performance, wear resistance and corrosion resistance to ensure stable lubrication effect during long-term use.

[0101] In the anti-disengagement sleeve 6, the spherical groove 63 and the oil storage cavity 64 are in communication with each other, which provides sufficient space for the rotation of the spherical body 52 of the input rod 5.

[0102] In some examples of the present application, referring to FIG. 4, the oil storage cavity 64 is located at the bottom of the spherical groove 63, and the oil storage cavity 64 is in the shape of an inverted cone.

[0103] The communication between the spherical groove 63 and the oil storage cavity 64 and the shape design of the oil storage cavity 64 can provide a certain rotation space for the rotation of the spherical body 52 and can ensure the supply of lubricant. The spherical body 52 can rotate freely within a certain range, and the rotation process is smooth and has little friction.

[0104] Specifically, when the spherical groove 63 and the oil storage cavity 64 are in communication with each other, the lubricant in the oil storage cavity 64 can directly enter the spherical groove 63, thereby providing continuous lubrication when the spherical body 52 rotates. This design ensures that the spherical body 52 is always covered by lubricant during rotation, reducing friction and wear, and improving the smoothness and efficiency of rotation.

[0105] In addition, the mutual communication between the spherical groove 63 and the oil storage cavity 64 also allows the lubricant to play a role of buffering and damping when the spherical body 52 rotates. When the spherical body 52 is subjected to external force, the lubricant can flow between the spherical groove 63 and the oil storage cavity 64, absorb and disperse the impact force, and reduce the direct collision and wear between mechanical parts.

[0106] In some examples of the present application, referring to FIG. 1 and FIG. 3, the anti-coming-off sleeve 6 is provided with a connecting structure 62 at one end away from the riveting structure 61; the piston 7 is provided with a connecting hole 70 matched with the connecting structure 62; the connecting structure 62 is inserted into the connecting hole 70, and the connecting structure 62 and the connecting hole 70 are in interference fit.

[0107] When the connecting structure 62 and the connecting hole 70 are in interference fit, the size of the connecting structure 62 is designed to be slightly larger than the hole diameter of the connecting hole 70. When the connecting structure 62 is inserted into the connecting hole 70, the connecting structure 62 will be subjected to a certain extrusion force due to the existence of the interference amount, thereby forming a tight fit in the connecting hole 70. This fit can effectively prevent the connecting structure 62 from loosening or falling off in the connecting hole 70, thereby improving the stability and reliability of the connection between the anti-coming-off sleeve 6 and the piston 7.

[0108] Optionally, the outer wall of the connecting structure 62 can be provided with interference press-fitting similar to knurling, or the outer wall surface can be provided with a smooth surface for interference press-fitting.

[0109] In some examples of the present application, referring to FIG. 1, the master cylinder body 40 further comprises a limiting cover 3, and the limiting cover 3 is arranged on one side of the cylinder body 4; referring to FIG. 5 and FIG. 6, the limiting cover 3 is provided with a cavity 30, and part of the piston 7 is located in the cavity 30.

[0110] In some examples of the present application, referring to FIG. 1, the master cylinder body 40 further comprises a limiting cover 3, and the limiting cover 3 is arranged on one side of the cylinder body 4; referring to FIG. 5 and FIG. 6, the limiting cover 3 is provided with a cavity 30, and part of the piston 7 is located in the cavity 30.

[0111] Referring to FIG. 1, the limiting cover 3 is arranged on one side of the piston 7 (i.e. the side of the spherical body 52), the spherical body 52 of the input rod 5 extends into the limiting cover 3, and an anti-coming-off sleeve 6 is sleeved on the spherical body 52, and the anti-coming-off sleeve 6 is also located in the limiting cover 3. The limiting cover 3 can be used to limit the axial displacement of the piston 7 in the cylinder body 4, and can also limit the axial displacement of the elastic element 2 sleeved on the input rod 5.

[0112] In some examples of the present application, referring to FIG. 1 and FIG. 2, the input rod 5 is provided with a stop structure 51 at one end away from the limiting cover 3; the elastic element 2 is located between the stop structure 51 and the limiting cover 3.

[0113] Referring to FIG. 1 and FIG. 2, the elastic element 2 is arranged between the stop structure 51 on the input rod 5 and the limiting cover 3. When the input rod 5 is impacted or vibrated, the elastic element 2 will be deformed, i.e. compressed or stretched, which can absorb and disperse these forces.

[0114] The elastic element 2 also provides a force to reset the input rod 5 and a force to retract the cylinder 4. That is, after the external force disappears, the elastic element 2 will restore its original shape, thereby pushing the related components back to their original position. This self-resetting function helps to maintain the stability and reliability of the vehicle 300 brake device 200 operation.

[0115] In some examples of the present application, referring to FIG. 5 and FIG. 6, the limiting cover 3 is provided with a limiting structure 31 that forms a limiting fit with the stop structure 51, and the stop structure 51 and the limiting structure 31 are oppositely arranged; one end of the elastic element 2 abuts against the stop structure 51, and the other end abuts against the limiting structure 31.

[0116] In some examples of the present application, referring to FIG. 2, the stop structure 51 is a ring-shaped baffle 510 extending outward in the radial direction of the input rod.

[0117] The stop structure 51 at one end of the input rod 5 provides a support point for the elastic element 2. The stop structure 51 can be used to limit the axial displacement of the elastic element 2.

[0118] The stop structure 51 is a ring-shaped baffle extending around the outer wall of one end of the input rod 5. This structure design of the baffle is easy to process and can be integrally formed with the input rod 5.

[0119] It should be noted that the ring-shaped baffle (stop structure 51) at one end of the input rod 5 can be flat, curved or have a specific shape, depending on the shape of the elastic element 2 and the required direction of movement. The material of the ring-shaped baffle is strong enough to withstand the force from the elastic element 2 and maintain stability for long-term use.

[0120] In some examples of the present application, referring to FIG. 1, FIG. 5 and FIG. 6, the limiting cover 3 has an open end 34, the limiting cover 3 comprises a top wall 32 and a side wall 33 connected with the top wall 32, wherein the top wall 32 is opposite to the open end 34; the top wall 32 is provided with an opening 320 for the input rod 5 to extend into, and the limiting structure 31 is annularly arranged on the side of the opening 320; the side wall 33 is bent to form a connecting portion 330 near one side of the open end 34, and the connecting portion 330 is connected with the cylinder body 4.

[0121] The opening 320 provided on the limiting cover 3 can allow the spherical body 52 at one end of the input rod 5 to enter the cavity 30, and the anti-coming-off sleeve 6 sleeved on the spherical body 52 can be fixedly connected with the piston 7. Specifically, the connecting structure 62 on the anti-coming-off sleeve 6 is inserted into the connecting hole 70 on the piston 7, and the connecting structure 62 and the connecting hole 70 are in interference fit.

[0122] The limiting cover 3 is located at one end of the input rod 5 provided with the spherical body 52, which can provide a support point for the other end of the elastic element 2.

[0123] Further, the elastic element 2 is sleeved on the input rod 5 and limited between the stop structure 51 on the input rod 5 and the limiting cover 3, and the elastic element 2 is used to reset the pushing force of the input rod 5 and help the cylinder body 4 to return.

[0124] The limiting cover 3 is arranged on one side of the piston 7 and connected with the cylinder body 4, which can be used to limit the axial displacement of the piston 7 and the axial displacement of the elastic element 2.

[0125] In some examples of the present application, referring to FIG. 5 and FIG. 6, the limiting structure 31 is an annular recess structure or an annular protruding structure.

[0126] For example, referring to FIG. 5, the limiting structure 31 can be an annular groove / annular R groove as shown in FIG. 5, and one end of the elastic element 2 away from the stop structure 51 can abut against the groove.

[0127] For example, referring to FIG. 6, the limiting structure 31 can be an annular protruding structure as shown in FIG. 5, which can be an annular boss, and one end of the elastic element 2 away from the stop structure 51 can be sleeved on the annular boss.

[0128] In some examples of the present application, referring to FIG. 1 and FIG. 2, one end of the input rod 5 away from the spherical body 52 extends outwardly to form an extension 53; and the extension 53 is threadedly connected with the adjusting rod 1.

[0129] Referring to Fig. 2, the extension section 53 of the input rod 5 is provided with a threaded structure, and the adjusting rod 1 is provided with a threaded hole matched with the threaded structure, and the adjusting rod 1 is threadedly connected with the extension section 53. In this way, the adjusting rod 1 and the input rod 5 are convenient to disassemble and assemble.

[0130] The input rod 5 and the adjusting rod 1 are matched and connected, and can play a key role in transmitting the pedal force from the vehicle 300. The two can be matched as part of the brake device 200 of the vehicle 300, and are responsible for converting the operation intention of the driver into mechanical movement, so as to realize the control of the vehicle 300.

[0131] The adjusting rod 1 is used for fine adjustment or amplification of the force from the input rod 5. In some cases, the force transmitted by the input rod 5 can be insufficient to directly drive the next component, and at this time, the adjusting rod 1 is needed to amplify the force. In addition, the adjusting rod 1 can also be used to adjust the relative position or angle of the mechanical components to meet different working requirements.

[0132] The adjusting rod 1 is a mechanism with a lever principle, and the size and direction of the force can be changed by changing the length of the force arm. When the force transmitted by the input rod 5 acts on the adjusting rod 1, the adjusting rod 1 will rotate or move according to its design, so as to change the direction or size of the force.

[0133] According to another aspect of the embodiments of the present application, a brake device 200 is provided, which comprises the brake master cylinder 100 according to any one of the above embodiments.

[0134] As shown in Fig. 8, the brake device 200 provided by the embodiments of the present application significantly improves the stability, durability and safety of the brake system by adopting the brake master cylinder 100 with spherical hinge and anti-falling design, and provides a strong guarantee for the safe driving of the vehicle 300.

[0135] The brake device 200 provided by the embodiments of the present application is an indispensable important part in the automobile, machinery, electric power and other industries, and its main function is to slow down or stop the mechanical movement through the brake torque transmission, so as to realize the control of the machinery.

[0136] According to still another aspect of the embodiments of the present application, a vehicle 300 is provided, as shown in Fig. 9, which comprises a vehicle body 301 and the brake device 200 as described above.

[0137] The specific embodiments of the brake device 200 and the vehicle 300 of the embodiments of the present application can refer to the above-mentioned embodiments of the brake master cylinder 100, and thus at least have all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0138] The above embodiments mainly describe the differences between the various embodiments, and the optimization features different between the various embodiments can be combined to form a better embodiment without contradiction. For the sake of brevity, details are not repeated here.

[0139] Although some specific embodiments of the present application have been described in detail by way of example with reference to the drawings, it is to be understood that the examples are for illustration only and are not intended to limit the scope of the present application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A brake master cylinder, wherein, The utility model relates to a master cylinder, which comprises: a cylinder body (4); a piston (7) arranged in the cylinder body (4); a push rod assembly (50) comprising an input rod (5), one end of the input rod (5) extending into the cylinder body (4) and being connected to the piston (7), and an elastic element (2) sleeved on a section of the input rod (5) outside the cylinder body (4), and the elastic element (2) abutting against the master cylinder body.

2. The brake master cylinder according to claim 1, wherein The push rod assembly (50) comprises an anti-disengagement sleeve (6), one end of the input rod (5) being rotationally connected to the anti-disengagement sleeve (6), and the anti-disengagement sleeve (6) being arranged in the cylinder body (4) and being connected to the piston (7).

3. The brake master cylinder according to claim 2, wherein One end of the input rod (5) is provided with a spherical body (52). The anti-disengagement sleeve (6) is provided with a spherical groove (63) matched with the spherical body (52). The spherical body (52) and the spherical groove (63) form a spherical hinge, and the spherical body (52) can rotate in the spherical groove (63).

4. The brake master cylinder according to claim 3, wherein The groove mouth of the spherical groove (63) is annularly provided with a riveting structure (61), and the riveting structure (61) is used for limiting the spherical body (52) from disengaging from the spherical groove (63).

5. The brake master cylinder according to claim 4, wherein The riveting structure (61) comprises a plurality of spaced riveting blocks (610), and the plurality of riveting blocks (610) enclose a conical space to lock the spherical body (52) in the spherical groove (63).

6. The brake master cylinder according to claim 5, wherein The riveting blocks (610) are provided as four, and the four riveting blocks (610) are equiangularly spaced around the groove mouth of the spherical groove (63).

7. Brake master cylinder according to any of claims 4-6, wherein One end of the anti-disengagement sleeve (6) away from the riveting structure (61) is provided with a connecting structure (62). The piston (7) is provided with a connecting hole (70) matched with the connecting structure (62). The connecting structure (62) is inserted into the connecting hole (70), and the connecting structure (62) and the connecting hole (70) are in interference fit.

8. Brake master cylinder according to any of claims 3-7, wherein The anti-disengagement sleeve (6) is provided with an oil storage cavity (64) in communication with the spherical groove (63). The oil storage cavity (64) is used for filling lubricant.

9. The brake master cylinder according to claim 8, wherein The oil storage cavity (64) is located at the groove bottom of the spherical groove (63), and the oil storage cavity (64) is inverted conical.

10. Brake master cylinder according to any of claims 1-9, wherein The master cylinder body further comprises a limiting cover (3) covering one side of the cylinder body (4). The limiting cover (3) is provided with a cavity (30), and part of the piston (7) is located in the cavity (30).

11. The brake master cylinder according to claim 10, wherein One end of the input rod (5) away from the limiting cover (3) is provided with a stop structure (51). The elastic element (2) is located between the stop structure (51) and the limiting cover (3).

12. The brake master cylinder according to claim 11, wherein The limiting cover (3) is provided with a limiting structure (31) limiting the stop structure (51), and the stop structure (51) and the limiting structure (31) are oppositely arranged. One end of the elastic element (2) abuts against the stop structure (51), and the other end abuts against the limiting structure (31).

13. The brake master cylinder according to claim 12, wherein The stop structure (51) is a ring-shaped baffle (510) extending radially outward along the input rod (5).

14. The brake master cylinder according to claim 12 or 13, wherein The limiting cover (3) has an open end (34), and the limiting cover (3) comprises a top wall (32) and a side wall (33) connected with the top wall (32), wherein the top wall (32) is opposite to the open end (34); An opening (320) for the input rod (5) to extend into is arranged on the top wall (32), and the limiting structure (31) is annularly arranged on the periphery of the opening (320); The side wall (33) is bent to form a connecting portion (330) on the side close to the open end (34), and the connecting portion (330) is connected with the cylinder body (4).

15. Brake master cylinder according to any of claims 12 to 14, wherein The limiting structure (31) is an annular recessed structure or an annular protruding structure.

16. The brake master cylinder according to any one of claims 3 to 9, wherein An extension section (53) extends outward from one end of the input rod (5) away from the spherical body (52); The extension section (53) is threadedly connected with the adjusting rod (1).

17. A brake device wherein, Comprising: The brake master cylinder (100) according to any one of claims 1-16.

18. A vehicle, wherein, Comprising: A vehicle body (301); And The brake device (200) according to claim 17.

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