Pressure buffer and vehicle hydraulic braking equipment

Abstract

The invention discloses a pressure buffer and vehicle hydraulic braking equipment and relates to the technical field of hydraulic pressure. The pressure buffer comprises a shell block, a buffer body and a valve assembly. The shell block is provided with a first cavity and a second cavity which are communicated with each other, the buffer body is arranged in the first cavity, the valve assembly is arranged in the second cavity, and the buffer body is communicated with the interior of the valve assembly; the pressure buffer further comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe penetrates through the shell block, one end of the liquid inlet pipe is connected to the joint of the first cavity and the second cavity, and the liquid outlet pipe penetrates through the shell block and one end of the liquid outlet pipe communicates with the valve assembly. Brake fluid is introduced into the fluid inlet pipe, sequentially flows into the buffer body and the valve assembly and then flows out through the fluid outlet pipe. The pressure buffer is simple in overall structure, the number of parts is reduced, and the machining difficulty and the manufacturing cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulics, and more particularly, to a pressure buffer and a vehicle hydraulic braking device. Background Art

[0002] In a vehicle hydraulic braking system, a pressure buffer suppresses pressure fluctuations by dynamically regulating the flow of brake fluid, thereby keeping the vehicle stable during braking and ensuring stable and reliable braking performance under various complex working conditions.

[0003] In the existing buffer structures, the valve housing and the buffer housing are mostly connected separately. One end of the valve assembly needs to extend to the end of the buffer housing, and one end is pressed into the valve housing through a deformation process, and the other end forms an annular groove that can cover the end of the buffer housing through a deformation process, resulting in a complex structure, high processing difficulty, and high manufacturing cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a pressure buffer and a vehicle hydraulic braking device, which have a simple overall structure, reduce the number of components, and lower the processing difficulty and manufacturing cost.

[0005] The embodiments of the present invention are implemented as follows: In one aspect of the present invention, a pressure buffer is provided, which includes a housing block, a buffer body, and a valve assembly; the housing block has a first cavity and a second cavity that communicate with each other, the buffer body is installed in the first cavity, the valve assembly is installed in the second cavity, and the interiors of the buffer body and the valve assembly communicate with each other; the pressure buffer further includes an inlet pipe and an outlet pipe, the inlet pipe penetrates the housing block and one end is connected to the connection between the first cavity and the second cavity, the outlet pipe penetrates the housing block and one end communicates with the valve assembly; brake fluid is introduced into the inlet pipe, and the brake fluid flows into the buffer body and the valve assembly in sequence and then flows out through the outlet pipe.

[0006] Optionally, the buffer body includes a buffer housing and a buffer assembly disposed in the buffer housing, the buffer housing is disposed in the first cavity, and the outer wall of the buffer housing abuts against the inner wall of the first cavity.

[0007] Optionally, the outer wall of one side of the buffer housing facing the valve assembly has a flange; the outer wall of the end of the buffer housing is provided with an annular groove.

[0008] Optionally, the buffer assembly includes an elastic buffer body and a buffer body support, the buffer body support is sleeved on one end of the elastic buffer body facing the valve assembly; the elastic buffer body has a first hollow portion, and the buffer body support is in an annular structure and is coaxially arranged with the elastic buffer body.

[0009] Optionally, an outer wall of one end of the buffer body support extends towards the elastic buffer body to form an annular clamping groove for clamping the elastic buffer body; an inner wall of the annular clamping groove forms a conical structure with an inner diameter gradually decreasing along the central axis towards the elastic buffer body, and an outer wall of an end of the elastic buffer body is adapted to the inner wall of the annular clamping groove.

[0010] Optionally, the valve assembly includes a valve seat disposed in the second cavity, and the valve seat has a first through cavity; a valve core assembly and an elastic assembly are sequentially disposed in the first through cavity along the outflow direction of the brake fluid, and the valve core assembly abuts against the elastic assembly; a second through cavity is formed in the middle of the valve core assembly, and a third through cavity is formed in the middle of the elastic assembly, and the second through cavity and the third through cavity communicate to form a second hollow portion; the second hollow portion communicates with the buffer body.

[0011] Optionally, the valve core assembly includes a valve core and a seal body, the second through cavity is disposed in the valve core, and the seal body is movably disposed in the second through cavity; the elastic assembly includes an elastic support seat and an elastic element, the elastic element is disposed in the elastic support seat, one end of the elastic element abuts against the valve seat, and the other end abuts against the valve core; the end face diameter of the elastic element is smaller than the diameter of the seal body.

[0012] Optionally, the second through cavity in the valve core has a first opening and a second opening, the first opening faces the buffer body support, and the second opening faces the elastic assembly; the inner diameter of the first opening is smaller than the inner diameter of the second opening, and an outer wall of the valve core on the side facing the buffer body support is in an arc structure; the first through hole in the valve seat has a third opening and a fourth opening, the third opening faces the buffer body, and the fourth opening faces the elastic assembly; the inner diameter of the third opening is smaller than the inner diameter of the second opening so that the third opening is adapted to the first opening.

[0013] Optionally, a plurality of protruding portions are convexly provided on the outer wall of the valve core along the circumferential direction, and a preset interval is provided between any two adjacent protruding portions.

[0014] On the other hand, the present invention provides a vehicle hydraulic braking device, which includes a pressure buffer.

[0015] Optionally, the vehicle hydraulic braking device further includes a hydraulic pump, and an output end of the hydraulic pump is connected to the pressure buffer.

[0016] The beneficial effects of the present invention include: The present application provides a pressure buffer, which includes a housing block, a buffer body and a valve assembly; the housing block has a first cavity and a second cavity that communicate with each other, the buffer body is installed in the first cavity, the valve assembly is installed in the second cavity, and the interiors of the buffer body and the valve assembly communicate with each other; compared with the structure in the prior art where the valve housing and the buffer housing are separately connected, the pressure buffer provided by the present application no longer requires one end of the valve assembly to extend to the end of the buffer housing and undergo complex deformation process treatment, reducing the connection process and deformation operation between components, thereby simplifying the manufacturing process; moreover, for the pressure buffer provided by the present application, only the buffer body and the valve assembly need to be respectively installed in the corresponding cavities of the housing block, reducing the technical difficulty and risk during the processing, and improving the production efficiency. The pressure buffer further includes a liquid inlet pipe and a liquid outlet pipe. The liquid inlet pipe penetrates the housing block and one end is connected to the connection part of the first cavity and the second cavity, and the liquid outlet pipe penetrates the housing block and one end communicates with the valve assembly; the liquid inlet pipe introduces brake fluid, and the brake fluid flows into the buffer body and the valve assembly in sequence and then flows out through the liquid outlet pipe. The overall structure of the above pressure buffer is simple, reducing the number of components, and lowering the processing difficulty and manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the pressure buffer provided by the embodiment of the present invention; Figure 2 It is a schematic structural diagram of the valve assembly of the pressure buffer provided by the embodiment of the present invention; Figure 3 It is one of the schematic structural diagrams of the valve core of the pressure buffer provided by the embodiment of the present invention; Figure 4 It is the second schematic structural diagram of the valve core of the pressure buffer provided by the embodiment of the present invention.

[0019] Icons: 100 - Pressure buffer; 110 - Housing block; 120 - Buffer body; 121 - Buffer housing; 1211 - Flange; 1212 - Annular groove; 1221 - Elastic buffer body; 1222 - Buffer body bracket; 1222a - Annular clamping groove; 130 - Valve assembly; 131 - Valve seat; 1311 - Third opening; 1312 - Fourth opening; 132 - Spool assembly; 1321 - Spool; 1321a - First opening; 1321b - Second opening; 1321c - Protrusion; 1321d - Counterbore; 1322 - Sealing body; 133 - Elastic component; 1331 - Elastic support seat; 1332 - Elastic element; 140 - Liquid inlet pipe; 150 - Liquid outlet pipe. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "vertical", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the products of the present invention are usually placed during use. These are only for the convenience of describing the present invention 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 invention. In addition, the terms "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0022] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer toFigure 1 , this embodiment provides a pressure buffer 100, which includes a housing block 110, a buffer body 120, and a valve assembly 130; the housing block 110 has a first cavity and a second cavity that communicate with each other, the buffer body 120 is installed in the first cavity, the valve assembly 130 is installed in the second cavity, and the interiors of the buffer body 120 and the valve assembly 130 communicate with each other; the pressure buffer 100 further includes a liquid inlet pipe 140 and a liquid outlet pipe 150, the liquid inlet pipe 140 penetrates the housing block 110 and one end is connected to the connection part of the first cavity and the second cavity, the liquid outlet pipe 150 penetrates the housing block and one end communicates with the valve assembly 130; the liquid inlet pipe 140 introduces brake fluid, and the brake fluid flows into the buffer body 120 and the valve assembly 130 in sequence and then flows out through the liquid outlet pipe 150.

[0025] Specifically, as Figure 1 shown, the housing block 110 has a first cavity and a second cavity that are internally connected to each other. The first cavity is used to install the buffer body 120, and its design dimensions are adapted to the buffer body 120 to ensure the stable installation of the buffer body 120; the second cavity is used to install the valve assembly 130, and it is also precisely designed according to the shape and size of the valve assembly 130 to ensure the stable operation of the valve assembly 130 after installation. The interiors of the buffer body 120 and the valve assembly 130 communicate with each other, enabling the brake fluid to flow smoothly between the two. Through this reasonable cavity layout and component installation method, the internal structure of the pressure buffer 100 is compact.

[0026] Compared with the structure in the prior art where the valve housing and the buffer housing are connected separately, the pressure buffer 100 provided in this application no longer requires one end of the valve assembly 130 to extend to the end of the buffer housing 121 and perform complex deformation process treatment, reducing the connection process and deformation operation between components, thereby simplifying the manufacturing process; and the pressure buffer 100 provided in this application only needs to install the buffer body 120 and the valve assembly 130 in the corresponding cavities of the housing block 110 respectively, reducing the technical difficulty and risk in the processing process and improving the production efficiency.

[0027] When the vehicle's hydraulic braking system is working, the brake fluid enters the pressure buffer 100 through the liquid inlet pipe 140. The brake fluid first flows into the buffer body 120 in the first cavity. In the buffer body 120, the brake fluid is affected by the internal structure, and the pressure fluctuation is initially alleviated and regulated. Subsequently, the preliminarily regulated brake fluid flows from the buffer body 120 into the valve assembly 130 connected thereto, and the valve assembly 130 further precisely controls and regulates the pressure and flow rate of the brake fluid. Finally, the brake fluid that has been double-regulated by the buffer body 120 and the valve assembly 130 flows out of the pressure buffer 100 through the liquid outlet pipe 150 and enters the subsequent links of the vehicle's hydraulic braking system, pushing the braking components to work with stable and reliable pressure, thereby ensuring the vehicle remains stable during braking and providing guarantee for the safe driving of the vehicle.

[0028] In another feasible implementation manner of the present application, the buffer body 120 in the above-mentioned pressure buffer 100 can also be replaced with a plug, which can reduce the manufacturing cost while meeting the general noise requirements.

[0029] The overall structure of the above-mentioned pressure buffer 100 is simple, reducing the number of components, and lowering the processing difficulty and manufacturing cost.

[0030] Exemplarily, as Figure 1 shown, the buffer body 120 includes a buffer housing 121 and a buffer assembly disposed inside the buffer housing 121. The buffer housing 121 is disposed in the first cavity, and the outer wall of the buffer housing 121 abuts against the inner wall of the first cavity. The buffer housing 121 being disposed in the first cavity ensures the stable installation of the buffer housing 121 in the first cavity, preventing the buffer housing 121 from shifting or shaking under the pressure generated by the flow of the brake fluid and ensuring the stability of the operation of the buffer body 120; one end of the housing is closed and the other end is provided with an opening, and the buffer assembly can be assembled into the buffer housing 121 through this opening, which can prevent the buffer assembly from being collided by the outside; and the buffer assembly can communicate with the valve assembly 130 through this opening.

[0031] Optionally, as Figure 1 shown, the outer wall of the buffer housing 1 into the annular groove 1212, thereby further improving the connection stability between the buffer housing 121 and the housing block 110.

[0032] Exemplarily, as Figure 1As shown, the buffer assembly includes an elastic buffer body 1221 and a buffer body bracket 1222. The buffer body bracket 1222 is sleeved on one end of the elastic buffer body 1221 facing the valve assembly 130. The elastic buffer body 1221 has a first hollow portion inside. The buffer body bracket 1222 is in a ring structure and is coaxially arranged with the elastic buffer body 1221.

[0033] Specifically, the elastic buffer body 1221 is made of an elastic material and can deform when the brake fluid pressure changes, absorb the energy generated by the pressure fluctuation, and then adjust the brake fluid pressure. Preferably, the elastic buffer body 1221 is made of EPDM rubber. The elastic buffer body 1221 has a hollow portion inside, and the hollow portion is used for the brake fluid to flow in. One end of the hollow portion is closed and the other end has an opening, and the opening is used to connect the buffer body bracket 1222.

[0034] The buffer body bracket 1222 is in a ring structure made of metal. The hollow portion of the ring structure is used for the brake fluid to flow through. The elastic buffer body 1221 is embedded in the buffer body bracket 1222 and has an interference fit with the buffer body bracket 1222. The inner diameter of the buffer body bracket 1222 gradually decreases from the elastic buffer body 1221 towards the valve assembly 130 to form a conical structure.

[0035] Among them, as Figure 1 shown, the outer wall of the elastic buffer body 1221 is sequentially provided with a wave structure along the sleeving direction with the buffer housing 121, so that the outer wall of the elastic buffer body 1221 forms multiple rings of annular protrusions. The wave structure can disperse the pressure to a certain extent, avoid the pressure concentrating on a certain part of the elastic buffer body 1221, thereby enhancing the ability of the elastic buffer body 1221 to cope with pressure fluctuations and improving the buffering effect.

[0036] Exemplarily, as Figure 1 shown, an annular clamping groove 1222a is formed by the extension of the outer wall of one end of the buffer body bracket 1222 facing the elastic buffer body 1221. The annular clamping groove 1222a is used to clamp the elastic buffer body 1221. The inner wall of the annular clamping groove 1222a forms a conical structure with an inner diameter gradually decreasing along the central axis towards the elastic buffer body 1221, and the outer wall of the end of the elastic buffer body 1221 is adapted to the inner wall of the annular clamping groove 1222a.

[0037] Through the setting of the annular clamping groove 1222a, the relative position between the elastic buffer 1221 and the buffer bracket 1222 can be ensured to be stable. Under the pressure generated by the flow of the brake fluid, the axial or circumferential displacement of the elastic buffer 1221 is prevented, and the stability of the internal structure of the buffer assembly is guaranteed. After the elastic buffer 1221 is snapped into the annular clamping groove 1222a, the conical structure enables them to fit tightly, effectively avoiding the leakage of the brake fluid from the gap between them and ensuring that the brake fluid flows along the predetermined path inside the buffer assembly. At the same time, the adapted structure is also beneficial to the transmission of force. When the brake fluid pressure acts on the elastic buffer 1221, the elastic buffer 1221 can evenly transmit the force to the buffer bracket 1222, making the buffer assembly more balanced in force during operation and improving the performance and stability of the entire pressure buffer 100.

[0038] In an implementable manner of the present application, as Figure 2 shown, the valve assembly 130 includes a valve seat 131 disposed in the second cavity. The valve seat 131 has a first through cavity; a valve core assembly 132 and an elastic assembly 133 are sequentially disposed in the first through cavity along the outflow direction of the brake fluid. The valve core assembly 132 abuts against the elastic assembly 133; a second through cavity is provided in the middle of the valve core assembly 132, and a third through cavity is provided in the middle of the elastic assembly 133. The second through cavity and the third through cavity are communicated to form a second hollow part; the second hollow part is communicated with the buffer body 120.

[0039] Specifically, as Figure 2 shown, the valve seat 131 has a cylindrical structure, and a third opening 1311 and a fourth opening 1312 are respectively provided at both ends thereof. The third opening 1311 and the fourth opening 1312 are communicated to form a first through hole. The third opening 1311 faces the buffer bracket 1222, and the fourth opening 1312 faces the elastic assembly 133; the inner diameter of the third opening 1311 is smaller than the inner diameter of the fourth opening 1312, so it is convenient to assemble the valve core assembly 132 and the elastic assembly 133 from the fourth opening 1312; a conical surface is provided on the inner wall near the third opening 1311, so that when the valve core assembly 132 is communicated with the third opening 1311 with a smaller inner diameter, its outer wall can abut against the inner wall of the valve seat 131 near the third opening 1311, thereby further improving the sealing performance of the valve assembly 130.

[0040] The valve core assembly 132 includes a valve core 1321 and a seal body 1322. The second through cavity is provided in the valve core 1321. Among them, as Figure 4As shown, the second through cavity in the valve core 1321 has a first opening 1321a and a second opening 1321b. The first opening 1321a is arranged facing the buffer body bracket 1222, and the second opening 1321b is arranged facing the elastic component 133. The inner diameter of the first opening 1321a is smaller than that of the second opening 1321b. The outer wall of the valve core 1321 on the side facing the buffer body bracket 1222 is of an arc structure, and the arc structure can be in sealing abutment with the inner wall conical surface of the valve seat 131, improving the sealing performance of the valve assembly 130. The inner wall of the valve core 1321 on the side facing the buffer body bracket 1222 is of a conical surface structure. Preferably, the conical surface angle is 80 - 110°. It should be noted that in an implementable manner of the present application, first, as Figure 3 As shown, a plurality of protruding portions 1321c are circumferentially protruded on the outer wall of the valve core 1321, and a preset interval is provided between any two adjacent protruding portions 1321c. Through such a setting method, when the valve core 1321 is opened, the interval between two adjacent protruding portions 1321c can form a larger outflow channel to avoid throttling. Moreover, the plurality of protruding portions 1321c arranged at intervals can form a plurality of support points between the valve core 1321 and the valve seat 131, making the position of the valve core 1321 in the valve seat 131 more stable and not prone to shaking or offset.

[0041] Among them, the present application does not impose any restrictions on the specific number and specific size of the protruding portions 1321c. The number of the protruding portions 1321c is at least two, and the sizes of any two adjacent protruding portions 1321c can be the same or different, as long as it can ensure that there is an interval for the outflow of the brake fluid between two adjacent protruding portions 1321c.

[0042] Second, as Figure 3 As shown, a counterbore 1321d is further provided at the bottom end of the valve core 1321, so that one end of the elastic component 133 can abut in the counterbore 1321d. The setting of the counterbore 1321d facilitates the better abutment of the elastic component 133 with the valve core 1321, further improving the use reliability of the pressure buffer 100.

[0043] The sealing body 1322 is movably arranged in the second through cavity, and one end of it can be in contact with the conical surface structure of the inner wall of the valve core 1321. Among them, the contact surface between the sealing body 1322 and the conical surface structure is an arc surface, an arch surface or a conical surface. Preferably, the sealing body 1322 can be selected as a steel ball. When the sealing body 1322 abuts against the conical surface structure of the inner wall of the valve core 1321, there are pores, so that the brake fluid in the buffer body 120 can flow from the pores to the liquid outlet pipe 150.

[0044] As Figure 2As shown, the elastic component 133 includes an elastic support seat 1331 and an elastic element 1332. The elastic element 1332 is disposed within the elastic support seat 1331. One end of the elastic element 1332 abuts against the valve seat 131, and the other end abuts against the valve core 1321. The interior of the elastic support seat 1331 has a cylindrical structure, and its outer arm has an interference fit with the inner wall of the valve seat 131.

[0045] Wherein, in order to prevent the sealing body 1322 from entering the interior of the elastic element 1332, the end face diameter of the elastic element 1332 is smaller than the diameter of the sealing body 1322. In a specific embodiment of the present application, the diameters of both ends of the elastic element 1332 gradually decrease, forming a structure with both ends closed, such that the diameter of the end is smaller than the diameter of the sealing body 1322. It should be noted that in the specific embodiments of the present application, the diameters of both ends may be the same or different, as long as it is ensured that the sealing body 1322 does not enter the interior of the elastic element 1332.

[0046] Preferably, the elastic element 1332 is a helical spring. The helical diameters at both ends of the helical spring are smaller than the diameter of the sealing body 1322, so as to prevent the sealing body 1322 from falling from the middle of the helical spring, ensuring stable contact between the sealing body 1322 and the valve core 1321.

[0047] On the other hand, the present invention provides a vehicle hydraulic braking device, which includes a pressure buffer 100. Optionally, the vehicle hydraulic braking device further includes a hydraulic pump, and the output end of the hydraulic pump is connected to the pressure buffer 100.

[0048] The brake fluid can enter the first hollow portion of the buffer body 120 of the pressure buffer 100 through the hydraulic pump from the inlet pipe 140. Since the brake fluid cannot be discharged in time from the gap between the seal and the inner wall of the valve core 1321, the buffer body 120 is under pressure. At the same time, part of the brake fluid flows out through the gap between the seal and the inner wall of the valve core 1321 via the valve seat 131 and the outlet pipe 150. Due to the presence of the buffer, pressure fluctuations can be suppressed to a certain extent.

[0049] When the brake fluid flow rate increases, the seal is pushed open under a greater pressure. At this time, the gap between the seal and the inner wall of the valve core 1321 becomes larger, making the channel for the brake fluid to flow out larger. When the pressure buffer 100 is not working, the seal of the valve assembly 130 is sealed with the inner wall of the valve core 1321 under pressure, isolating the pressure on the liquid outlet side and avoiding the impact on braking performance caused by the expansion of the buffer body 120.

[0050] Through the setting of the pressure buffer 100, the above-mentioned vehicle hydraulic braking equipment has a simple overall structure, reduces the number of components, and lowers the processing difficulty and manufacturing cost. The above are only optional embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0051] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

Claims

1. A pressure buffer, characterized in that, It includes a housing block (110), a buffer body (120) and a valve assembly (130); the housing block (110) has a first cavity and a second cavity that communicate with each other, the buffer body (120) is installed in the first cavity, the valve assembly (130) is installed in the second cavity, and the interiors of the buffer body (120) and the valve assembly (130) communicate with each other; the pressure buffer (100) further includes a liquid inlet pipe (140) and a liquid outlet pipe (150), the liquid inlet pipe (140) penetrates the housing block (110) and one end is connected to the connection of the first cavity and the second cavity, the liquid outlet pipe (150) penetrates the housing block and one end communicates with the valve assembly (130); the liquid inlet pipe (140) introduces brake fluid, and the brake fluid flows into the buffer body (120) and the valve assembly (130) in sequence and then flows out through the liquid outlet pipe (150).

2. The pressure buffer according to claim 1, wherein The buffer body (120) includes a buffer housing (121) and a buffer assembly arranged in the buffer housing (121), the buffer housing (121) is arranged in the first cavity, and the outer wall of the buffer housing (121) abuts against the inner wall of the first cavity.

3. The pressure buffer according to claim 2, characterized in that, The outer wall of one side of the buffer housing (121) facing the valve assembly (130) has a flange (1211); the outer wall of the end of the buffer housing (121) is provided with an annular groove (1212).

4. The pressure buffer according to claim 2, characterized in that The buffer assembly includes an elastic buffer body (1221) and a buffer body bracket (1222), the buffer body bracket (1222) is sleeved on one end of the elastic buffer body (1221) facing the valve assembly (130); the elastic buffer body (1221) has a first hollow part inside, and the buffer body bracket (1222) is in an annular structure and is coaxially arranged with the elastic buffer body (1221).

5. The pressure buffer according to claim 4, characterized in that, An annular clamping groove (1222a) extends from the outer wall of one end of the buffer body bracket (1222) facing the elastic buffer body (1221), and the annular clamping groove (1222a) is used for clamping the elastic buffer body (1221); the inner wall of the annular clamping groove (1222a) forms a conical structure with an inner diameter gradually decreasing along the central axis towards the elastic buffer body (1221), and the outer wall of the end of the elastic buffer body (1221) is adapted to the inner wall of the annular clamping groove (1222a).

6. The pressure buffer according to claim 5, characterized in that, The valve assembly (130) includes a valve seat (131) arranged in the second cavity, and the valve seat (131) has a first through cavity; a valve core assembly (132) and an elastic assembly (133) are sequentially arranged in the first through cavity along the outflow direction of the brake fluid, and the valve core assembly (132) abuts against the elastic assembly (133); the middle part of the valve core assembly (132) has a second through cavity, the middle part of the elastic assembly (133) has a third through cavity, and the second through cavity and the third through cavity communicate to form a second hollow part; the second hollow part communicates with the buffer body (120).

7. The pressure buffer according to claim 6, characterized in that, The spool assembly (132) includes a spool (1321) and a seal body (1322). The second through cavity is arranged in the spool (1321), and the seal body (1322) is movably arranged in the second through cavity. The elastic component (133) includes an elastic support seat (1331) and an elastic element (1332). The elastic element (1332) is arranged in the elastic support seat (1331). One end of the elastic element (1332) abuts against the valve seat (131), and the other end abuts against the spool (1321). The end face diameter of the elastic element (1332) is smaller than the diameter of the seal body (1322).

8. The pressure buffer according to claim 7, characterized in that, The second through cavity in the spool (1321) has a first opening (1321a) and a second opening (1321b). The first opening (1321a) faces the buffer body (120), and the second opening (1321b) faces the elastic component (133). The inner diameter of the first opening (1321a) is smaller than the inner diameter of the second opening (1321b). The outer wall of the spool (1321) on the side facing the buffer body support (1222) is of an arc structure. The first through hole in the valve seat (131) has a third opening (1311) and a fourth opening (1312). The third opening (1311) faces the buffer body (120), and the fourth opening (1312) faces the elastic component (133). The inner diameter of the third opening (1311) is smaller than the inner diameter of the second opening (1321b) so that the third opening (1311) is adapted to the first opening (1321a).

9. The pressure buffer according to claim 7, characterized in that, A plurality of protruding portions (1321c) are circumferentially convexly provided on the outer wall of the spool (1321), and a preset interval is provided between any two adjacent protruding portions (1321c).

10. A vehicle hydraulic braking device, characterized in that, Comprising the pressure buffer (100) according to any one of claims 1-9.

11. The vehicle hydraulic braking device according to claim 10, characterized in that, The vehicle hydraulic braking device further includes a hydraulic pump, and the output end of the hydraulic pump is connected to the pressure buffer (100).

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