Brake pedal simulator, piston thereof, brake assembly and vehicle

Abstract

The utility model relates to a brake pedal simulator, a piston of the brake pedal simulator, a brake assembly and a vehicle, and the piston (10) is provided with a body part (1000) and an overflowing structure arranged on the body part (1000) so as to communicate the outside with an inner cavity of the body part (1000). The overflowing structure is designed on the piston, brake fluid in the inner cavity of the piston can directly flow out through the overflowing structure on the piston, and smooth oil outlet is guaranteed; in addition, during oil return, the brake fluid in the overflowing channel can directly flow back into the inner cavity of the piston, the flowing path is shortened, backflow is faster, oil returns in the inner cavity of the cover body and the inner cavity of the piston at the same time, and the oil return efficiency is further improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle braking, and more particularly, to a piston of a brake pedal simulator, a brake pedal simulator, a brake assembly, and a vehicle. Background Art

[0002] A brake pedal simulator is used to provide the driver with the required pedal feel when the vehicle brakes. The actual braking force comes from a braking motor, achieving complete decoupling. The feedback of the pedal feel needs to be realized through an elastic member in the pedal simulator.

[0003] In the related art, the piston of the brake pedal simulator has a closed structure, and the brake fluid in the piston can only flow out from the top opening, with slow oil return and low oil return efficiency, resulting in the problem of a hard pedal. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a brake pedal simulator and its piston, brake assembly, and vehicle to solve the problem of less oil return of the piston and a hard pedal in the related art.

[0005] To achieve the above purpose, the present disclosure provides a piston of a brake pedal simulator, the piston having a body portion and a flow-through structure formed on the body portion to communicate the outside with the inner cavity of the body portion.

[0006] Optionally, the oil flow-through structure includes an opening formed on the side wall of the body portion.

[0007] Optionally, the body portion is configured as a cylindrical structure with an open top and a closed bottom, and the flow-through structure includes a slot formed on the end face of the body portion.

[0008] Optionally, the slot and / or the opening are multiple and arranged at intervals along the circumferential direction of the body portion.

[0009] According to a second aspect of the present disclosure, there is provided a brake pedal simulator, including:

[0010] A main body portion having a piston cavity, and a piston axially movable in the piston cavity, the piston being the above-mentioned piston;

[0011] A cover body fastened to the main body portion for closing the piston cavity,

[0012] wherein the main body portion is provided with an oil outlet, and a flow-through channel communicating with the oil outlet is provided between the inner wall of the cover body and the outer wall of the piston, and the flow-through structure is connected to the flow-through channel to communicate the outside with the inner cavity of the body portion.

[0013] Optionally, a movable partition is provided inside the cover body. A first spring is provided in the inner cavity of the piston. The partition is located above the first spring and is disposed opposite to the opening of the inner cavity of the piston. A third spring is provided between the cover body and the partition.

[0014] Optionally, a stepped portion is provided at the opening of the piston cavity. The lower end of the cover body abuts against the stepped portion. The projections of the inner wall of the cover body and the outer wall of the piston on a plane perpendicular to the axial direction are spaced apart to form the flow-through channel.

[0015] Optionally, the oil outlet is used to communicate with an oil pot. An oil groove communicating with the oil outlet is provided on the inner peripheral wall of the main body portion. The fluid in the oil pot can flow back into the inner cavity of the cover body through the oil outlet, the flow-through channel, and the oil groove in sequence.

[0016] Optionally, the partition is a disc-shaped structure with a through hole in the center. A flow-through portion is formed between the outer edge of the disc-shaped structure and the inner wall of the cover body. The flow-through portion communicates with the flow-through channel.

[0017] Optionally, the partition is a disc. The flow-through portion includes flow-through grooves provided on the outer periphery of the disc. The flow-through grooves are multiple and are arranged at intervals in the circumferential direction, and the openings face the inner wall of the cover body.

[0018] Optionally, the partition has alternately arranged arc-shaped edges and straight edges. A gap is left between the straight edge and the inner wall of the cover body to form the flow-through portion.

[0019] Optionally, a push rod is installed inside the cover body. The push rod has a rod body and a stop portion provided at one end of the rod body. The other end of the rod body is fixed on the end wall of the cover body. The partition is sleeved on the rod body movably in the axial direction and is limited downward by the stop portion. The spring is sleeved on the rod body and abuts against the end wall at one end and against the partition at the other end.

[0020] Optionally, a limiting post is provided on the end wall of the cover body. The rod body is inserted and fixed in the inner cavity of the limiting post. The limiting post is used to limit the partition upward.

[0021] Optionally, the piston moves axially between a first position and a second position in the piston cavity, where

[0022] In the first position, the piston cavity surrounds at most one first sub-region of the piston. In the second position, the piston cavity surrounds at least one second sub-region of the piston, and wherein the first sub-region is larger than the second sub-region.

[0023] Optionally, the first sub-region has at least 50% of the piston length, and the second sub-region is less than 50% but not less than 10% of the piston length.

[0024] Optionally, a limiting boss is provided on the inner wall of the cover body. The limiting boss is used to limit the movement of the partition member and the piston to ensure the length of the second sub-region.

[0025] According to a third aspect of the present disclosure, a braking assembly is provided, including the above-mentioned brake pedal simulator.

[0026] According to a fourth aspect of the present disclosure, a vehicle is provided, including the above-mentioned braking assembly.

[0027] Through the above technical solutions, by designing an over-flow structure on the piston, the brake fluid in the inner cavity of the piston can directly flow out through the over-flow structure on the piston to ensure smooth oil discharge. In addition, during oil return, the brake fluid in the over-flow channel can directly flow back into the inner cavity of the piston, shortening the flow path and making the oil return faster. The oil return in the inner cavity of the cover body and the inner cavity of the piston is carried out simultaneously, further improving the oil return efficiency.

[0028] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0029] The drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0030] Figure 1 is a perspective view of a brake pedal simulator provided by an exemplary embodiment of the present disclosure.

[0031] Figure 2 and Figure 3 is a cross-sectional view of a brake pedal simulator provided by a first exemplary embodiment of the present disclosure.

[0032] Figure 4 is Figure 3 a schematic diagram of the oil return path in

[0033] Figure 5 and Figure 6 is a cross-sectional view of a brake pedal simulator provided by a second exemplary embodiment of the present disclosure.

[0034] Figure 7 and Figure 8 are schematic diagrams of the structures of the piston at the first position and the second position in a brake pedal simulator provided by a second exemplary embodiment of the present disclosure.

[0035] Figure 9It is a schematic diagram of a separator in a brake pedal simulator provided by an exemplary embodiment of the present disclosure.

[0036] Figure 10 It is a schematic diagram of a separator in a brake pedal simulator provided by another exemplary embodiment of the present disclosure.

[0037] Figures 11 to 13 It is a schematic structural diagram of a piston provided by different exemplary embodiments of the present disclosure.

[0038] Figure 14 It is a schematic structural diagram of a brake pedal simulator provided by the third exemplary embodiment of the present disclosure.

[0039] Figure 15 is Figure 14 a schematic diagram of the oil return path in

[0040] Explanation of reference numerals

[0041] 1 - Main body part; 10 - Piston; 100 - First gap; 101 - First step part; 102 - Second step part; 11 - First spring; 12 - Oil inlet; 13 - Oil outlet; 131 - Oil groove; 14 - Piston cavity; 141 - Third step part; 15 - Flow - through channel; 1000 - Body part; 1001 - Opening; 1002 - Groove; 2 - Cover body; 20 - Separator; 200 - Through - hole; 201 - Flow - through groove; 202 - Arc - shaped edge; 203 - Straight edge; 21 - Second spring; 22 - Third spring; 221 - Limit boss; 23 - Thumb - screw; 231 - Stop part; 24 - Limit post; 3 - Sealing member. Detailed description of the specific embodiment

[0042] The following provides a detailed description of the specific embodiment of the present disclosure in conjunction with the accompanying drawings. It should be understood that the specific embodiment described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0043] In the present disclosure, unless otherwise stated, the orientation terms such as "upper, lower" generally refer to the drawing direction shown in the corresponding drawings, "axial, radial" refer to the direction relative to the central axis of the brake pedal simulator, "inner, outer" refer to the inside and outside of the contour of the corresponding component. In addition, when the following description involves the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another, and do not have sequentiality and importance.

[0044] In the present disclosure, as Figures 1 to 6As shown in the figure, a brake pedal simulator is provided. The brake pedal simulator includes a hydraulic unit (main body part 1) and a simulator unit (cover body 2). The main body part 1 is provided with a piston chamber 14, and a piston 10 that can move axially is arranged in the piston chamber 14. The main body part 1 can be a hydraulic block, a master cylinder, etc. The main body part 1 is provided with an oil inlet 12 and an oil outlet 13. The oil inlet 12 is communicated with the piston chamber 14, and the oil outlet 13 is communicated with the inner cavity of the cover body 2 and the inner cavity of the piston 10. A seal 3 is arranged between the inner wall of the main body part 1 and the piston 10. The oil inlet 12 and the oil outlet 13 are respectively located on both sides of the seal 3. In the present disclosure, there is brake fluid in the piston chamber 14, the inner cavity of the cover body 2, and the inner cavity of the piston 10 respectively. The brake fluids on both sides of the oil inlet 12 and the oil outlet 13 are independent of each other, and the piston 10 can isolate the flow channels where the oil inlet 12 and the oil outlet 13 are located.

[0045] The hydraulic pressure of the oil inlet 12 is controlled by the brake pedal. The oil outlet 13 is used to communicate with an oil pot (not shown in the figure). When the driver steps on the brake pedal, the brake fluid flows from the oil inlet 12 into the piston chamber 14, driving the piston 10 to move upward. At this time, when the hydraulic pressure in the inner cavities of the cover body 2 and the piston 10 is greater than the hydraulic pressure in the oil pot, the brake fluid flows out from the inner cavities of the cover body 2 and the piston 10 through the oil outlet 13 to the oil pot. When the driver releases the brake pedal, the acting force disappears, and the brake fluid in the piston chamber 14 flows out from the oil inlet 12. At this time, when the hydraulic pressure in the inner cavities of the cover body 2 and the piston 10 is less than the hydraulic pressure in the oil pot, the brake fluid flows from the oil pot through the oil outlet 13 to the inner cavities of the cover body 2 and the piston 10 for oil return. At this time, problems such as piston 10 jamming may occur if the oil return is not timely. When the driver steps on the brake pedal, the oil inlet 12 is in the high-pressure channel, and the oil outlet 13 is in the low-pressure channel. The piston 10 is arranged in the piston chamber 14 and can separate the low-pressure channel and the high-pressure channel. When stepping on the pedal, the flow rate of the low-pressure channel will also affect the feedback of the foot feeling force value. A leather cup groove is opened on the inner peripheral wall of the main body part 1, and the seal 3 is placed in the leather cup groove.

[0046] Based on the above content, the brake simulator provided by the present disclosure mainly involves the following improvements. Specifically,

[0047] Three-stage spring (First spring 11 + Second spring 21 + Third spring 22)

[0048] In the present disclosure, as Figure 2 shown, a first spring 11 is arranged in the inner cavity of the piston 10. The first spring 11 can be a rubber spring. The cover body 2 is buckled on the main body part 1 to close the piston chamber 14. A movable partition 20 is arranged in the cover body 2. Among them, the partition 20 is located above the first spring 11 and is arranged opposite to the opening of the inner cavity of the piston 10 for closing. A second spring 21 is arranged between the piston 10 and the partition 20, and a third spring 22 is arranged between the cover body 2 and the partition 20.

[0049] Compared with the embodiments provided with only rubber springs or with return springs and rubber springs, the present disclosure provides a three-stage spring arrangement including two springs and a rubber spring. Originally, the pedal force value was provided only by or mostly by the first spring 11. After adding the second spring 21 and the third spring 22, the weight of the pedal force value provided by the first spring 11 can be reduced, better providing the feedback of the foot feeling force value, and significantly improving the force value change in high-temperature and low-temperature environments. In addition, two of the three springs (the first spring 11 and the second spring 21) directly act on the piston 10, and the stiffness of the spring inside the piston 10 can be increased, reducing the stiffness difference from the third spring 22 outside the piston, making the force value change smoother. At the same time, the overall volume can be reduced, making the structure more compact.

[0050] The brake pedal simulator provided by the present disclosure at least has: a first working process, in which there is a first gap 100 between the piston 10 and the separator 20, and the piston 10 moves towards the direction close to the cover body 2, compressing the second spring 21; and a second working process, in which the piston 10 abuts against the separator 20, and the piston 10 continues to move and compress the third spring 22 and the first spring 11. In the two stages, the pedal force value is not provided only by the first spring 11. In the first stage, it is provided by the second spring 21, and in the second stage, it is jointly provided by the third spring 22 and the first spring 11, making the force value change more smoothly. The changes of the brake fluid in the two processes will be defined in combination with the specific structure below.

[0051] In the first exemplary embodiment of the present disclosure, as Figure 2 and Figure 3 shown, a first step portion 101 is provided on the outer wall of the piston 10. The second spring 21 is sleeved on the outer wall of the piston 10 and is arranged on the first step portion 101 to form a preload, and a first gap 100 is formed between the separator 20 and the piston 10. The second spring 21, the third spring 22, the first spring 11 and the piston 10 are arranged coaxially as a whole, avoiding deviation or inclination during the compression process.

[0052] In the second exemplary embodiment of the present disclosure, as Figure 5 and Figure 6As shown, a second stepped portion 102 is provided on the inner wall of the piston 10. The second spring 21 is located inside the piston 10, with one end abutting against the second stepped portion 102 and the other end abutting against the partition member 20. A first gap 100 is formed between the partition member 20 and the piston 10. The first spring 11 is at least partially located in the inner cavity of the second spring 21. Both the second spring 21 and the first spring 11 are arranged inside the piston 10. In this embodiment, the third spring 22 can be designed to be longer. The length from the second stepped portion 102 to the top wall of the piston 10 (which can be understood as the length of the second spring 21) is greater than the distance from the seal 3 to the top wall of the piston 10. That is, the second stepped portion 102 can be provided below the seal 3, effectively preventing the piston 10 from tilting due to the overly high position of the third spring 22.

[0053] The first spring 11 can have a special-shaped structure. For example, the upper part of the first spring 11 is designed as a tapered or frustum-shaped tapered structure, etc. In Figure 5 the shown embodiment, it is more convenient to install the second spring 21 and there will be no interference with the compression of the second spring 21. The second spring 21 and the third spring 22 can be helical springs, disc springs, scroll springs, etc. Compared with the disc spring structure, the helical spring is cheaper and has a lower processing and manufacturing cost.

[0054] To achieve the installation of the partition member 20 and the third spring 22, in the present disclosure, as Figure 2 shown, a push rod 23 is installed inside the cover 2. The push rod 23 has a rod body and a stop portion 231 provided at one end of the rod body. The other end of the rod body is fixed to the end wall of the cover 2. The partition member 20 is axially movably sleeved on the rod body and is limited downward by the stop portion 231. The third spring 22 is sleeved on the rod body, with one end abutting against the end wall and the other end abutting against the partition member 20. The push rod 23 can be of a T-shaped structure. Both the third spring 22 and the partition member 20 pass through the push rod 23 to fix it in the inner cavity of the cover 2 so that it cannot escape from the cover 2. A radially protruding clamping protrusion is provided at the end of the push rod 23 away from the stop portion 231, which can be designed as a tapered structure. The tapered structure is in interference fit with the limiting column 24 to fix the push rod 23 in the limiting column 24. In other embodiments, a limiting groove can be directly opened on the end wall of the cover 2, and the upper end of the rod body is inserted and fixed in the limiting groove. The push rod 23 only needs to be provided with the third spring 22 and does not need to be designed too long. The centers of gravity of the piston 10 and the push rod 23 are on the same axis, and there will be no eccentric wear during the movement of the piston 10. The partition member 20 is installed on the push rod 23 so as to be movable up and down, replacing the function of the traditional push rod, reducing the use of parts and lowering the cost. Compared with the embodiment in the related art where the push rod is press-fitted into the piston with interference, the embodiment provided by the present disclosure can solve problems such as difficult control of pressing, easy deformation of the piston, and easy occurrence of braking failure.

[0055] In the first exemplary embodiment of the present disclosure, asFigure 2 As shown, a limiting post 24 is provided on the end wall of the cover body 2. The rod body is inserted and fixed in the inner cavity of the limiting post 24, and the limiting post 24 is used to limit the upper position of the partition member 20. When the partition member 20 and the piston 10 move to the limiting post 24, a limiting effect can be achieved to prevent damage caused by overpressure on the first spring 11. When the partition member 20 moves to the limiting post 24, the full stroke of the brake pedal simulator is reached.

[0056] In the second exemplary embodiment of the present disclosure, as Figure 6 and Figure 8 shown, a limiting boss 221 is provided on the inner wall of the cover body 2. The limiting boss 221 is used to limit the movement of the partition member 20 and the piston 10, and can also play a limiting role to prevent damage caused by overpressure on the first spring 11. At the same time, it can also ensure the length of the second sub-region T2 in the following text.

[0057] The piston 10 moves axially in the piston cavity 14 between a first position and a second position. Among them, in the first position (as Figure 7 shown), the piston cavity 14 surrounds at most one first sub-region T1 of the piston 10. In the second position (as Figure 8 shown), the piston cavity 14 surrounds at least one second sub-region T2 of the piston 10, and among them, the first sub-region T1 is larger than the second sub-region T2. The lengths of T1 and T2 can effectively prevent the problem of tilting of the piston 10 caused by too small an envelope length, and the two can be designed according to the length of the piston 10. Here, the first sub-region T1 and the second sub-region T2 are respectively the limitations in the case of the extreme design of the piston 10 in two positions. In the extreme case, T1>T2 can be satisfied to ensure the envelope length of the piston 10.

[0058] In the present disclosure, the first sub-region T1 has at least 50% of the length of the piston 10, and the second sub-region T2 is less than 50% but not less than 10% of the length of the piston 10. The design of the length of T2 can prevent poor sealing at the position where the seal 3 is located due to too long a stroke of the piston 10.

[0059] The first spring 11 is placed in the inner cavity of the piston 10. In the first position, there is a second gap between the first spring 11 and the ejector rod 23, and the first gap 100 is not greater than the second gap. The first spring 11 is placed in the piston 10 and moves with the piston 10. The second gap can ensure that in the first process, only the second spring 21 is compressed. By designing the second gap, it can be realized whether only the third spring 22 is compressed or both the third spring 22 and the first spring 11 are compressed when the piston 10 abuts against the partition member 20. Therefore, the working process of the brake pedal simulator is at least the above two working processes.

[0060] An oil flow passage is designed between the inner wall of the cover body and the outer wall of the piston to increase the oil return efficiency

[0061] As Figure 3 and Figure 4 shown, the main body 1 is provided with an oil outlet 13, and a flow passage 15 communicating the inner cavity of the cover 2 and the oil outlet 13 is provided between the inner wall of the cover 2 and the outer wall of the piston 10. When the driver steps on the brake pedal, the brake fluid flows into the piston chamber 14 from the oil inlet 12, driving the piston 10 to move upward. At this time, the piston 10 does not contact the separator 20, and first compresses the second spring 21. The second spring 21 deforms under force and provides a pedal feedback force. When the piston 10 contacts the separator 20, the piston 10 pushes the separator 20 to move upward together, while compressing the third spring 22 and the first spring 11 until it moves to the limit projection 221 or the limit post 24. In the second working process, the hydraulic pressure in the cover 2 and the piston 10 increases, and the brake fluid flows out to the oil pot through the flow passage 15 and the oil outlet 13. By designing the flow passage 15, the brake fluid can flow smoothly to the oil outlet 13. When the brake pedal is released, the brake fluid in the oil pot can flow back to the inner cavity of the cover 2 and the inner cavity of the piston 10 through the oil outlet 13 and the flow passage 15, so that the piston 10 returns to its original position, the oil return is smoother, the oil return efficiency is improved, and the problem of the piston 10 being stuck is avoided.

[0062] Regarding the formation method of the flow passage 15, in the present disclosure, as Figure 3 shown, a third step portion 141 is provided at the opening of the piston chamber 14, and the lower end of the cover 2 is provided with a flanging that turns outward and abuts against the third step portion 141, so that the inner wall of the cover 2 and the outer wall of the piston 10 are spaced apart to form the flow passage 15. The third step portion 141 can be Figure 3 the first-level step as Figure 5 shown, or it can also be Figure 3 the second-level step as Figure 5 shown. In the embodiment as

[0063] shown, under the action of the hydraulic pressure in the cover 2, the position where the flanging abuts can be opened to flow to the oil outlet 13, and at the same time, the position where the cover 2 and the main body 1 can be connected has better sealing performance. In the embodiment as Figure 3 and Figure 5 shown, a oil groove 131 communicating with the oil outlet 13 is provided on the inner peripheral wall of the main body 1. The fluid in the inner cavity of the cover 2 can sequentially pass through the flow passage 15, the oil groove 131 and flow out to the oil pot through the oil outlet 13. Correspondingly, the oil return can also be realized. The oil groove 131 can be an annular oil groove surrounding the main body 1 for one week, or can be a semi-circular shape or other shapes. The oil groove 131 can increase the flow rate, which plays an important role in improving the overall feel of the foot, and the force value changes more smoothly.

[0064] The separator is designed with an oil flow part, which is connected to the oil flow passage

[0065] In the above embodiments, the shaft diameter of the separator 20 can be smaller than the inner diameter of the cover 2, forming a gap with the inner wall of the cover 2, which will not affect the flow of the brake fluid to the flow-through channel 15. In the case where the shaft diameter of the separator 20 is relatively large, as Figure 5 shown, the separator 20 is a disc-shaped structure with a through hole 200 provided at the center. A flow-through portion is formed between the outer edge of the disc-shaped structure and the inner wall of the cover 2, and the flow-through portion is communicated with the flow-through channel 15. The brake fluid in the inner cavity of the piston 10 can enter the inner cavity of the cover 2 through the through hole 200. The brake fluid in the inner cavity of the cover 2 can reach the flow-through channel 15 through the flow-through portion on the separator 20 and flow out to the oil pot from the oil outlet 13, or return oil in the reverse direction.

[0066] As Figure 9 shown, the separator 20 can be a disc, and the flow-through portion includes flow-through grooves 201 provided on the outer periphery of the disc. The flow-through grooves 201 can be a plurality of grooves arranged at intervals in the circumferential direction, and the openings face the inner wall of the cover 2. As Figure 10 shown, the cross-section of the separator 20 can be a structure with an irregular shape. The separator 20 has alternately arranged arc-shaped edges 202 and straight edges 203, and a gap is left between the straight edge 203 and the inner wall of the cover 2 to form a flow-through portion. The gaps formed by the flow-through holes, the flow-through grooves 201, and the straight edge 203 can all enable the brake fluid to flow to the flow-through channel 15 faster, increase the flow-through rate, further improve the return efficiency, and improve the disadvantage of insufficient flow-through of the brake pedal simulator when the pedal is quickly depressed, and solve the problem of the pedal becoming hard.

[0067] Openings are made on the side of the piston to improve the oil return efficiency

[0068] In the present disclosure, to further improve the oil return efficiency, as Figures 11 to 13 shown, the present disclosure has designed the structure of the piston 10. The piston 10 has a body portion 1000 and a flow-through structure provided on the body portion 1000 to communicate the outside and the inner cavity of the piston 10. The brake fluid in the inner cavity of the piston 10 can directly flow out through the flow-through structure on the piston to ensure smooth oil discharge. In addition, as Figure 14 and Figure 15 shown, the flow-through structure is provided on the side wall of the piston 10 and can be communicated with the flow-through channel 15. In other embodiments, it can also be communicated with the oil outlet 13. Taking Figure 15Taking the illustrated embodiment as an example, during oil return, the brake fluid that enters the flow-through channel 15 from the oil outlet 13 through the oil tank 131 is divided into two paths for oil return. One path directly returns to the inner cavity of the piston 10 through the flow-through structure on the piston 10, and the other path flows through the flow channel 15 and the flow-through part (such as the flow-through groove 201) on the separator 20 in sequence and then returns to the inner cavity of the cover body 2 for oil return. By designing a flow-through structure on the piston 10, the brake fluid in the flow-through channel 15 can directly return to the inner cavity of the piston 10, shortening the flow path and enabling faster return. The inner cavity of the cover body 2 and the inner cavity of the piston 10 return oil simultaneously, further improving the oil return efficiency. Here, when the piston 10 is in the first position, the flow-through structure can be located above the oil outlet 13; otherwise, alignment with the oil outlet 13 needs to be considered.

[0069] In an exemplary embodiment of the present disclosure, as Figure 11 shown, the flow-through structure includes an opening 1001 formed on the side wall of the main body part 1000. In another exemplary embodiment of the present disclosure, as Figure 12 shown, the main body part 1000 is configured as a cylindrical structure with an open top and a closed bottom, and the flow-through structure includes a slot 1002 formed on the end face of the main body part 1000. Of course, as Figure 13 shown, the present disclosure also includes an embodiment in which both an opening 1001 and a slot 1002 are designed on the main body part 1000.

[0070] In the above embodiments, there can be multiple slots 1002 and / or openings 1001, which are arranged at intervals along the circumferential direction of the main body part 1000. The shapes of the opening 1001 and the slot 1002 are not specifically limited and can be circular holes, square holes, irregular shapes, arc-shaped grooves, serrated grooves, etc., all of which fall within the protection scope of the present disclosure.

[0071] According to the third aspect of the present disclosure, a braking assembly is provided, including the brake pedal simulator introduced above. This braking assembly has all the beneficial effects of the above-mentioned brake pedal simulator, and will not be elaborated here too much.

[0072] According to the fourth aspect of the present disclosure, a vehicle is provided, including the braking assembly introduced above. This vehicle has all the beneficial effects of the above-mentioned brake pedal simulator and braking assembly, and will not be elaborated here too much.

[0073] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0074] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0075] In addition, any combinations can be made among various different embodiments of the present disclosure, as long as they do not violate the idea of the present disclosure, and they should equally be regarded as the content disclosed by the present disclosure.

Claims

1. A piston for a brake pedal simulator, characterized in that: The piston comprises a main body and a flow-through structure provided on the main body to connect the outside with the inner cavity of the main body.

2. The piston of the brake pedal simulator according to claim 1, characterized in that: The flow-through structure includes an opening formed on a side wall of the main body.

3. The piston of the brake pedal simulator according to claim 2, characterized in that: The main body is constructed as a cylindrical structure with an open top and a closed bottom, and the flow-through structure includes a groove opened on the end surface of the main body.

4. The piston of the brake pedal simulator according to claim 3, characterized in that: The number of the slots and / or the openings is plural and arranged at intervals along the circumference of the main body.

5. A brake pedal simulator, characterized in that: include: A main body, wherein the main body is provided with a piston cavity, wherein an axially movable piston is provided in the piston cavity, and the piston is the piston of the brake pedal simulator according to any one of claims 1 to 4; A cover body, buckled on the main body and used to close the piston cavity, Among them, the main body is provided with an oil outlet for connecting with the oil pot, and a flow channel connected with the oil outlet is provided between the inner wall of the cover body and the outer wall of the piston, and the flow structure is connected with the flow channel to connect the outside with the inner cavity of the main body.

6. The brake pedal simulator according to claim 5, characterized in that: A movable partition is provided in the cover body, wherein a first spring is provided in the inner cavity of the piston, the partition is located above the first spring and arranged opposite to the inner cavity opening of the piston, and a third spring is provided between the cover body and the partition.

7. The brake pedal simulator according to claim 5, characterized in that: A step portion is provided at the opening of the piston cavity, the lower end of the cover body abuts against the step portion, and the projections of the inner wall of the cover body and the outer wall of the piston on a plane perpendicular to the axial direction are arranged at intervals to form the flow channel.

8. The brake pedal simulator according to claim 7, characterized in that: The oil outlet is used to be connected to the oil pot. An oil groove connected to the oil outlet is provided on the inner peripheral wall of the main body. The fluid in the oil pot can flow back to the inner cavity of the cover body through the oil outlet, the flow channel and the oil groove in sequence.

9. The brake pedal simulator according to claim 6, characterized in that: The separator is a disc-shaped structure with a through hole at the center, and a flow portion is formed between the outer edge of the disc-shaped structure and the inner wall of the cover body, and the flow portion is connected to the flow channel.

10. The brake pedal simulator according to claim 9, characterized in that: The separator is a disc, and the flow portion includes a flow groove arranged on the outer circumference of the disc. The flow groove is a plurality of grooves arranged at intervals along the circumferential direction, and the openings face the inner wall of the cover body.

11. The brake pedal simulator according to claim 9, characterized in that: The partition has arc edges and straight edges that are alternately arranged, and a gap is left between the straight edges and the inner wall of the cover body to form the flow-through portion.

12. The brake pedal simulator according to claim 6, characterized in that: A push rod is installed in the cover body, and the push rod has a rod body and a stop portion arranged at one end of the rod body. The other end of the rod body is fixed to the end wall of the cover body. The partition can be axially movably sleeved on the rod body and is lowered by the stop portion. The spring is sleeved on the rod body and one end abuts against the end wall and the other end abuts against the partition.

13. The brake pedal simulator according to claim 12, characterized in that: A limiting column is provided on the end wall of the cover body, the rod body is inserted into and fixed in the inner cavity of the limiting column, and the limiting column is used to perform an upper limit position on the partition.

14. A brake assembly, characterized in that: A brake pedal simulator comprising any one of claims 5-13.

15. A vehicle, characterized in that: Includes the brake assembly as described in claim 14.

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