Brake pedal simulator, brake assembly and vehicle

Abstract

A brake pedal simulator, a brake assembly and a vehicle. The brake pedal simulator comprises a main body portion and a cover, wherein a piston cavity is provided in the main body portion, an axially movable piston is provided in the piston cavity, and a first spring is provided in an inner cavity of the piston; and the cover is arranged on the main body portion in an covering manner to close the piston cavity, a movable separator is provided in the cover, the separator is located above the first spring and is arranged opposite an opening of the inner cavity of the piston, a second spring is provided between the piston and the separator, and a third spring is provided between the cover and the separator.

Description

Brake pedal simulator, brake assembly and vehicle

[0001] Cross Reference to Related Applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202410904364.6, filed on July 5, 2024, entitled "Brake pedal simulator, brake assembly and vehicle", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of vehicle braking, in particular, to a brake pedal simulator, a brake assembly and a vehicle. BACKGROUND

[0004] The brake pedal simulator is used to provide the pedal feeling required by the driver when the automobile brakes, and the actual braking force comes from the brake motor, realizing complete decoupling. The feedback of the pedal feeling needs to be realized by the elastic element in the brake pedal simulator.

[0005] In the related art, the pedal feeling of the brake pedal simulator is mainly provided by the rubber spring. The rubber spring is more sensitive to temperature changes. When the temperature drops in winter, the temperature of the rubber becomes low, and the hardness becomes large, and the pedal force value cannot meet the requirements. SUMMARY

[0006] The purpose of the present disclosure is to provide a brake pedal simulator, a brake assembly and a vehicle to solve the problem that the pedal force value cannot meet the requirements in a low temperature environment in the related art.

[0007] In order to achieve the above-mentioned purpose, the present disclosure provides a brake pedal simulator, comprising:

[0008] A main body portion is provided with a piston cavity, an axially movable piston is arranged in the piston cavity, and a first spring is arranged in the inner cavity of the piston;

[0009] A cover body is arranged on the main body portion to close the piston cavity, and a movable partition is arranged in the cover body. The partition is arranged above the first spring and opposite to the inner cavity opening of the piston. A second spring is arranged between the piston and the partition, and a third spring is arranged between the cover body and the partition.

[0010] Optionally, the brake pedal simulator has at least:

[0011] A first working process, the first gap is arranged between the piston and the partition, the piston moves towards the cover body, and the second spring is compressed; and

[0012] In a second working process, the piston abuts against the partition, and the piston continues to move and compresses the third spring and the first spring.

[0013] Optionally, a first step is arranged on the outer wall of the piston, and the second spring is arranged on the outer wall of the piston and on the first step, and a first gap is formed between the partition and the piston.

[0014] Optionally, a second step is arranged on the inner wall of the piston, and the second spring is arranged inside the piston and abuts against the second step at one end and abuts against the partition at the other end, and a first gap is formed between the partition and the piston.

[0015] Optionally, a sealing member is arranged between the inner wall of the main body and the piston, and the length of the second step to the top wall of the piston is greater than the distance of the sealing member to the top wall of the piston.

[0016] Optionally, a top rod is arranged in the cover, the top rod has a rod body and a stopper arranged at one end of the rod body, the other end of the rod body is fixed to the end wall of the cover, the partition is arranged on the rod body in an axially movable manner and is limited by the stopper, and the third spring is arranged on the rod body and abuts against the end wall at one end and abuts against the partition at the other end.

[0017] Optionally, a limiting column is arranged on the end wall of the cover, the rod body is inserted into and fixed in the inner cavity of the limiting column, and the limiting column is used for limiting the partition from above.

[0018] Optionally, a radial protruding clamping protrusion is arranged at the end of the top rod away from the stopper, so as to fix the top rod in the limiting column.

[0019] Optionally, the piston moves in the piston cavity in an axial direction between a first position and a second position, wherein,

[0020] 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 greater than the second sub-region.

[0021] Optionally, the first sub-region has at least 50% of the length of the piston, and the second sub-region is less than 50% but not less than 10% of the length of the piston.

[0022] Optionally, a limiting boss is arranged on the inner wall of the cover, the limiting boss is used for limiting the movement of the partition and the piston, so as to ensure the length of the second sub-region.

[0023] Optionally, a first gap is formed between the partition and the piston when the first position is reached, and a second gap is formed between the first spring and the top rod, the first gap being no larger than the second gap.

[0024] Optionally, the main body is provided with an oil outlet, and a flow passage is formed between the inner wall of the cover and the outer wall of the piston to communicate the inner cavity of the cover and the oil outlet.

[0025] Optionally, a third step is formed at the opening of the piston cavity, and a flange is formed at the lower end of the cover to abut against the third step, the inner wall of the cover and the outer wall of the piston being spaced apart in a plane perpendicular to the axial direction to form the flow passage.

[0026] Optionally, the oil outlet is configured to communicate with an oil pot, and an oil groove is formed in the inner wall of the main body to communicate with the oil outlet, so that the fluid in the oil pot can flow back to the inner cavity of the cover through the oil outlet, the flow passage and the oil groove.

[0027] Optionally, the partition is a disc-shaped structure having a through hole in the center, and a flow passage is formed between the outer edge of the disc-shaped structure and the inner wall of the cover to communicate with the flow passage.

[0028] Optionally, the partition is a disc, and the flow passage includes a flow groove formed in the outer periphery of the disc, the flow groove being a plurality of grooves spaced apart in the circumferential direction and having openings facing the inner wall of the cover.

[0029] Optionally, the partition has alternating arc-shaped edges and straight edges, and a third gap is formed between the straight edges and the inner wall of the cover to form the flow passage.

[0030] Optionally, the side wall of the piston is provided with an opening, and the opening communicates with the flow passage.

[0031] Optionally, the main body is provided with an oil inlet and an oil outlet, the oil inlet communicates with the piston cavity to form a high-pressure passage, the oil outlet communicates with the inner cavity of the cover to form a low-pressure passage, and the piston is arranged in the piston cavity to separate the low-pressure passage and the high-pressure passage.

[0032] Optionally, a sealing member is arranged between the inner wall of the main body and the piston, and the oil inlet and the oil outlet are respectively arranged on the two sides of the sealing member.

[0033] According to a second aspect of the present disclosure, a brake assembly is provided, which includes the brake pedal simulator described above.

[0034] According to a third aspect of the present disclosure, a vehicle is provided, comprising the brake assembly described above.

[0035] Compared with the embodiments provided with only rubber springs or provided with return springs and rubber springs, the third spring arrangement provided with two springs and rubber springs can reduce the weight of the rubber springs in providing pedal force values, better provide feedback of foot feeling force values, and significantly improve force value changes in high-temperature and low-temperature environments. In addition, two of the three springs (the first spring and the second spring) directly act on the piston, the stiffness of the internal spring of the piston can be increased, the stiffness difference between the third spring outside the piston can be reduced, the force value change is smoother, the overall volume can be reduced, and the structure is more compact.

[0036] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0038] FIG. 1 is a perspective view of a brake pedal simulator according to an example embodiment of the present disclosure.

[0039] FIGS. 2 and 3 are cross-sectional views of the brake pedal simulator according to the first example embodiment of the present disclosure.

[0040] FIG. 4 is a schematic view of an oil return path in FIG. 3.

[0041] FIGS. 5 and 6 are cross-sectional views of the brake pedal simulator according to the second example embodiment of the present disclosure.

[0042] FIGS. 7 and 8 are schematic views of the structure of a piston in the brake pedal simulator according to the second example embodiment of the present disclosure in a first position and a second position.

[0043] FIG. 9 is a schematic view of a partition according to an example embodiment of the present disclosure.

[0044] FIG. 10 is a schematic view of a partition according to another example embodiment of the present disclosure.

[0045] FIGS. 11 to 13 are schematic views of the structure of a piston according to different example embodiments of the present disclosure.

[0046] FIG. 14 is a schematic view of the structure of a brake pedal simulator according to a third example embodiment of the present disclosure.

[0047] FIG. 15 is a schematic view of an oil return path in FIG. 14.

[0048] Fig. 16 is a structural block diagram of a vehicle according to an exemplary embodiment of the present disclosure.

[0049] BRIEF DESCRIPTION OF DRAWINGS 1 - body part; 10 - piston; 100 - first gap; 101 - first step part; 102 - second step part; 103 - inner cavity opening; 104 - second gap; 105 - third gap; 11 - first spring; 12 - oil inlet; 13 - oil outlet; 131 - oil groove; 14 - piston cavity; 141 - third step part; 15 - overflow passage; 16 - cup groove; 1000 - body part; 1001 - opening; 1002 - slot; 2 - cover; 20 - partition; 2000 - overflow part; 200 - through hole; 201 - overflow groove; 202 - arc edge; 203 - straight edge; 21 - second spring; 22 - third spring; 221 - limiting boss; 23 - ejector rod; 230 - rod body; 231 - stop part; 232 - clamping boss; 24 - limiting column; 3 - sealing member; 4 - vehicle; 41 - brake assembly; 411 - brake pedal simulator; 412 - oil can. DETAILED DESCRIPTION

[0050] The specific embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0051] In the present disclosure, the orientation words such as "upper" and "lower" generally refer to the directions of the drawing surface shown in the corresponding drawings, "axial direction" and "radial direction" refer to the directions relative to the central axis of the brake pedal simulator, "inner" and "outer" refer to the inner and outer of the corresponding components, and in addition, in the following description, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The terms "first", "second", and the like used in the present disclosure are used to distinguish one element from another element, and do not have sequential or important meanings.

[0052] In the present disclosure, as shown in Figures 1 to 6, a brake pedal simulator is provided, which comprises a hydraulic unit (main body part 1) and a simulator unit (cover body 2), the main body part 1 is provided with a piston cavity 14, an axially movable piston 10 is arranged in the piston cavity 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 in communication with the piston cavity 14, the oil outlet 13 is in communication with the inner cavity of the cover body 2 and the inner cavity of the piston 10, a sealing element 3 is arranged between the inner wall of the main body part 1 and the piston 10, and the oil inlet 12 and the oil outlet 13 are respectively located on the two sides of the sealing element 3. In the present disclosure, brake fluid is respectively arranged in the piston cavity 14, the inner cavity of the cover body 2 and the inner cavity of the piston 10, the brake fluid on the two sides of the oil inlet 12 and the oil outlet 13 is 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.

[0053] The hydraulic pressure of the oil inlet 12 is controlled by the brake pedal, and the oil outlet 13 is used to communicate with an oil pot 412 (not shown in Figures 1 to 15), when the driver steps on the brake pedal, the brake fluid flows from the oil inlet 12 into the piston cavity 14 to drive 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 412, the brake fluid flows out from the inner cavities of the cover body 2 and the piston 10 to the oil pot 412 through the oil outlet 13. When the driver releases the brake pedal, the force disappears, and the brake fluid in the piston cavity 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 412, the brake fluid flows from the oil pot 412 to the inner cavities of the cover body 2 and the piston 10 through the oil outlet 13 to perform oil return, at this time, if the oil return is not timely, problems such as piston 10 jamming may occur. When the driver steps on the brake pedal, the oil inlet 12 is in a high-pressure channel, the oil outlet 13 is in a low-pressure channel, and the piston 10 is arranged in the piston cavity 14 and can separate the low-pressure channel and the high-pressure channel, and when the pedal is stepped on, the excessive flow of the low-pressure channel will also affect the foot feeling force value feedback. The inner peripheral wall of the main body part 1 is provided with a leather cup groove 16, and the sealing element 3 is arranged in the leather cup groove 16.

[0054] Based on the above, the brake simulator provided by the present disclosure mainly involves the following improvements,

[0055] Three-stage spring (first spring 11 + second spring 21 + third spring 22)

[0056] In the present disclosure, as shown in FIG. 2, a first spring 11 is arranged in the inner cavity of the piston 10, the first spring 11 can be a rubber spring, a cover body 2 is buckled on the main body 1 to close the piston cavity 14, a movable partition 20 is arranged in the cover body 2, wherein the partition 20 is located above the first spring 11 and is arranged opposite to the inner cavity opening 103 of the piston 10, 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.

[0057] Compared with the embodiments provided with only a rubber spring or provided with a return spring and a rubber spring, the present disclosure provides a three-stage spring arrangement mode containing two springs and a rubber spring, and the pedal force value is originally provided by the first spring 11 only or mostly, after the second spring 21 and the third spring 22 are added, the weight of the pedal force value provided by the first spring 11 can be reduced, the foot feeling force value feedback is better provided, and the force value change in high-temperature and low-temperature environments is obviously improved. In addition, two of the three springs (the first spring 11 and the second spring 21) directly act on the piston 10, the stiffness of the internal spring of the piston 10 can be increased, the stiffness difference with the third spring 22 outside the piston is reduced, the force value change is more smooth, and the overall volume can be reduced, so that the structure is more compact.

[0058] The brake pedal simulator provided by the present disclosure at least has: a first working process, the first gap 100 is arranged between the piston 10 and the partition 20, the piston 10 moves towards the cover body 2, and the second spring 21 is compressed; and a second working process, the piston 10 abuts against the partition 20, and the piston 10 continues to move and compresses the third spring 22 and the first spring 11. In the two stages, the pedal force value is not provided by the first spring 11 only, the first stage is provided by the second spring 21, and the second stage is provided by the third spring 22 and the first spring 11 together, and the force value change is more stable. The change of brake fluid in the two processes will be limited in combination with the specific structure below.

[0059] In the first exemplary embodiment of the present disclosure, as shown in FIGS. 2 and 3, a first step portion 101 is arranged on the outer wall of the piston 10, the second spring 21 is arranged on the outer wall of the piston 10 and arranged on the first step portion 101 and forms a pre-pressing, and the first gap 100 is formed between the partition 20 and the piston 10. The second spring 21, the third spring 22, the first spring 11 and the piston 10 are coaxially arranged as a whole, so that deviation or inclination does not occur in the compression process.

[0060] In the second exemplary embodiment of the present disclosure, as shown in FIGS. 5 and 6, a second step portion 102 is arranged on the inner wall of the piston 10, the second spring 21 is arranged inside the piston 10 and abuts against the second step portion 102 at one end and abuts against the partition piece 20 at the other end, the first gap 100 is formed between the partition piece 20 and the piston 10, and the first spring 11 is at least partially arranged 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 second spring 21 can be designed to be longer, the length of the second step 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 sealing member 3 to the top wall of the piston 10, that is, the second step portion 102 can be arranged below the sealing member 3, effectively preventing the piston 10 from tilting due to the third spring 22 being too high.

[0061] The first spring 11 can be of a special shape, for example, the upper part of the first spring 11 is designed to be tapered, frustoconical or other tapered structures, which is more convenient for installing the second spring 21 and does not interfere with the compression of the second spring 21 in the embodiment shown in FIG. 5. The second spring 21 and the third spring 22 can be coil springs, butterfly springs, volute springs, etc. Compared with the disc spring structure, the coil spring is cheaper in price and lower in processing and manufacturing cost.

[0062] In order to install the partition piece 20 and the third spring 22, in the present disclosure, as shown in FIG. 2, a top rod 23 is arranged in the cover body 2, the top rod 23 has a rod body 230 and a stop portion 231 arranged at one end of the rod body 230, the other end of the rod body 230 is fixed to the end wall of the cover body 2, the partition piece 20 is movably arranged on the rod body and is limited by the stop portion 231 at the lower end, and the third spring 22 is arranged on the rod body 230 and abuts against the end wall at one end and abuts against the partition piece 20 at the other end. The top rod 23 can be of a T-shaped structure, the third spring 22 and the partition piece 20 are arranged through the top rod 23 to fix them in the inner cavity of the cover body 2 so that they cannot be taken out of the cover body 2. The end of the top rod 23 away from the stop portion 231 is provided with a radially protruding clamping protrusion 232 which can be designed to be tapered, and the tapered structure is in interference fit with the limiting column 24 to fix the top rod 23 in the limiting column 24. In other embodiments, a limiting slot can be directly formed in the end wall of the cover body 2, and the upper end of the rod body 230 is inserted and fixed in the limiting slot. The top rod 23 only needs to arrange the third spring 22, and the top rod 23 does not need to be designed to be too long, the center of gravity of the piston 10 and the top rod 23 is located on the same axis, and the piston 10 will not be eccentrically worn during movement. The partition piece 20 is movably arranged on the top rod 23 to replace the traditional push rod, reduce the use of parts and lower the cost. Compared with the embodiment in the related art in which the push rod is interference-pressed into the piston 10, the embodiment provided in the present disclosure can solve the problems of difficult control of pressing control, easy deformation of the piston and easy brake failure.

[0063] In the first exemplary embodiment of the present disclosure, as shown in FIG. 2, a limiting post 24 is arranged on the end wall of the cover 2, and the rod 230 is inserted and fixed in the inner cavity of the limiting post 24, and the limiting post 24 is used for limiting the upper position of the partition 20. When the partition 20 and the piston 10 move to the limiting post 24, the limiting effect can be achieved, and the damage caused by overpressure on the first spring 11 can be prevented. When the partition 20 moves to the limiting post 24, the full stroke of the brake pedal simulator is reached.

[0064] In the second exemplary embodiment of the present disclosure, as shown in FIG. 6 and FIG. 8, a limiting boss 221 is arranged on the inner wall of the cover 2, and the limiting boss 221 is used for limiting the movement of the partition 20 and the piston 10, and the limiting effect can also be achieved, and the damage caused by overpressure on the first spring 11 can be prevented, and the length of the second sub-area T2 in the following can also be ensured.

[0065] The piston 10 moves axially in the piston cavity 14 between a first position and a second position, wherein, in the first position (as shown in FIG. 7), the piston cavity 14 surrounds at most one first sub-area T1 of the piston 10, and in the second position (as shown in FIG. 8), the piston cavity 14 surrounds at least one second sub-area T2 of the piston 10, and wherein the first sub-area T1 is greater than the second sub-area T2. The lengths of T1 and T2 can effectively prevent the problem of inclination of the piston 10 caused by too small envelope length, and can be designed according to the length of the piston 10. Here, the first sub-area T1 and the second sub-area T2 are respectively limited in the case of extreme design of the piston 10, and in the extreme case, T1>T2 can be ensured to guarantee the envelope length of the piston 10.

[0066] In the present disclosure, the first sub-area T1 has at least 50% of the length of the piston 10, and the second sub-area 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 the problem of poor sealing at the position of the seal 3 caused by too long stroke of the piston 10.

[0067] The first spring 11 is arranged in the inner cavity of the piston 10, and in the first position, the second gap 104 is arranged between the first spring 11 and the top rod 23, and the first gap 100 is not greater than the second gap 104. The first spring 11 is arranged in the piston 10 and moves with the piston 10, and the second gap 104 can ensure that only the second spring 21 is compressed in the first process. By designing the second gap 104, it can be realized whether only the third spring 22 is compressed or the third spring 22 and the first spring 11 are compressed at the same time when the piston 10 abuts against the partition 20, so that the working process of the brake pedal simulator is at least the two working processes introduced above.

[0068] A through channel is designed between the inner wall of the cover and the outer wall of the piston to increase the oil return efficiency

[0069] As shown in FIG. 3 and FIG. 4, the main body 1 is provided with an oil outlet 13, and a flow passage 15 is arranged between the inner wall of the cover body 2 and the outer wall of the piston 10 to communicate the inner cavity of the cover body 2 and the oil outlet 13. When the driver steps on the brake pedal, the brake fluid flows into the piston cavity 14 from the oil inlet 12, drives the piston 10 to move upward, at this time, the piston 10 does not contact the partition 20, and the second spring 21 is compressed first, the second spring 21 is deformed under the force and provides pedal feedback force, when the piston 10 contacts the partition 20, the piston 10 pushes the partition 20 to move upward together, and the third spring 22 and the first spring 11 are compressed, until the movement to the limiting protrusion 221 or the limiting column 24. In the second working process, the hydraulic pressure in the cover body 2 and the piston 10 increases, the brake fluid flows out to the oil pot 412 through the flow passage 15 and the oil outlet 13, and the flow passage 15 is designed to make the brake fluid flow smoothly to the oil outlet 13. When the brake pedal is released, the brake fluid in the oil pot 412 can flow back to the inner cavity of the cover body 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 the original position, the oil return is smoother, the oil return efficiency is improved, and the problem of piston 10 jamming is avoided.

[0070] Regarding the forming mode of the flow passage 15, in the present disclosure, as shown in FIG. 3, a third step portion 141 is arranged at the opening of the piston cavity 14, and the lower end of the cover body 2 is provided with a folded edge outwardly folded and abutting against the third step portion 141, so that the inner wall of the cover body 2 and the outer wall of the piston 10 are arranged in a spaced manner and form the flow passage 15. The third step portion 141 can be a one-step as shown in FIG. 3, or a two-step as shown in FIG. 5. In the embodiment shown in FIG. 3, the position abutting against the folded edge can be opened under the hydraulic pressure in the cover body 2 to flow to the oil outlet 13, and at the same time, the position connecting the cover body 2 and the main body 1 has better sealing performance. In the embodiment shown in FIG. 5, the limiting protrusion 221 is formed, and at the same time, the lower part of the cover body 2 can be made thinner, so that the flow passage 15 is formed between the cover body 2 and the piston 10.

[0071] In the embodiments shown in FIG. 3 and FIG. 5, the inner peripheral wall of the main body 1 is provided with an oil groove 131 communicating with the oil outlet 13, and the fluid in the inner cavity of the cover body 2 can flow through the flow passage 15, the oil groove 131 and the oil outlet 13 in sequence and flow out to the oil pot 412, and correspondingly, the oil return can also be realized. The oil groove 131 can be an annular oil groove surrounding the main body 1, or a semicircular or other shape, and the oil groove 131 can increase the flow rate and play an important role in improving the overall foot feeling and making the force value change more stable.

[0072] The partition is designed to have a flow portion communicating with the flow passage

[0073] In the above embodiments, the shaft diameter of the partition 20 can be smaller than the inner diameter of the cover 2, forming a third gap 105 between the inner wall of the cover 2, without affecting the flow of brake fluid through the flow passage 15. In the case of a larger shaft diameter of the partition 20, as shown in FIGS. 5, 9 and 10, the partition 20 is a disc structure with a through hole 200 in the center, and the outer edge of the disc structure forms a flow-through portion 2000 between the inner wall of the cover 2, which is in communication with the flow passage 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, and the brake fluid in the inner cavity of the cover 2 can pass through the flow-through portion 2000 on the partition 20 to the flow passage 15 and flow out of the oil outlet 13 to the oil pan 412, or vice versa.

[0074] As shown in FIG. 9, the partition 20 can be a disc, and the flow-through portion 2000 includes a flow-through groove 201 provided on the outer periphery of the disc, which can be a plurality of circumferentially spaced grooves, and the openings are directed towards the inner wall of the cover 2. As shown in FIG. 10, the cross section of the partition 20 can be an irregular shape, and the partition 20 has alternating arc-shaped edges 202 and straight edges 203, and the gap between the straight edges 203 and the inner wall of the cover 2 forms the flow-through portion 2000. The flow-through holes, flow-through grooves 201 and gaps formed by the straight edges 203 can make the brake fluid flow faster to the flow passage 15, increase the flow rate, further improve the efficiency of the backflow, and solve the problem of hard pedal when the brake pedal simulator is not sufficient to flow.

[0075] Piston side opening to improve oil return efficiency

[0076] In the present disclosure, in order to further improve the oil return efficiency, as shown in FIGS. 11-13, the piston 10 is designed to have 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, ensuring smooth oil outflow. In addition, as shown in FIGS. 14 and 15, the flow-through structure is provided on the side wall of the piston 10 and can be in communication with the flow-through channel 15, or in communication with the oil outlet 13 in other embodiments. Taking the embodiment shown in FIG. 15 as an example, when returning oil, the brake fluid entering the flow-through channel 15 from the oil outlet 13 is divided into two paths, one of which directly returns to the inner cavity of the piston 10 through the flow-through structure on the piston 10, and the other of which flows through the flow-through channel 15, the flow-through portion 2000 (e.g., flow-through groove 201) on the partition 20, and the inner cavity of the cover 2 in sequence to return oil. By designing the 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, returning faster, and simultaneously returning oil to the inner cavity of the cover 2 and the inner cavity of the piston 10, 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 the alignment with the oil outlet 13 needs to be considered.

[0077] In an exemplary embodiment of the present disclosure, as shown in FIG. 11, the flow-through structure includes an opening 1001 provided on the side wall of the body portion 1000. In another exemplary embodiment of the present disclosure, as shown in FIG. 12, the body portion 1000 is configured as a cylindrical structure with an open top and a closed bottom, and the flow-through structure includes a slot 1002 provided on the end face of the body portion 1000. Of course, as shown in FIG. 13, the present disclosure also includes an embodiment in which the opening 1001 and the slot 1002 are designed on the body portion 1000.

[0078] In the above embodiments, the slot 1002 and / or the opening 1001 can be multiple and arranged at intervals along the circumference of the body portion 1000. The shape of the opening 1001 and the slot 1002 is not specifically limited, which can be a circular hole, a square hole, an irregular shape, which can be an arcuate slot, a zigzag slot, etc., all of which belong to the protection scope of the present disclosure.

[0079] According to a second aspect of the present disclosure, as shown in FIG. 16, a brake assembly 41 is provided, which includes the brake pedal simulator 411 described above, and has all the beneficial effects of the brake pedal simulator 411 described above, which will not be repeated here.

[0080] According to a third aspect of the present disclosure, as shown in FIG. 16, a vehicle 4 is provided, which includes the brake assembly 41 described above. The vehicle 4 has all the beneficial effects of the brake pedal simulator 411 and the brake assembly 41 described above, which will not be repeated here.

[0081] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details of the above-described embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0082] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0083] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A brake pedal simulator (411), characterized by The brake pedal simulator (411) at least has: A first working process, the first gap (100) is formed between the piston (10) and the partition (20), the piston (10) moves towards the direction close to the cover (2), and the second spring (21) is compressed; and A second working process, the piston (10) abuts against the partition (20), the piston (10) continues to move and compresses the third spring (22) and the first spring (11).

2. Brake pedal simulator (411) according to claim 1, characterized in that The outer wall of the piston (10) is provided with a first step portion (101), the second spring (21) is sleeved on the outer wall of the piston (10) and arranged on the first step portion (101), and the first gap (100) is formed between the partition (20) and the piston (10). The inner wall of the piston (10) is provided with a second step portion (102), the second spring (21) is located inside the piston (10) and abuts against the second step portion (102) at one end and abuts against the partition (20) at the other end, and the first gap (100) is formed between the partition (20) and the piston (20). The inner wall of the main body (1) and the piston (10) are provided with a sealing member (3), the length from the second step portion (102) to the top wall of the piston (10) is greater than the distance from the sealing member (3) to the top wall of the piston (10).

3. Brake pedal simulator (411) according to claim 1 or 2, characterized in that The cover (2) is provided with a top rod (23), the top rod (23) has a rod body (230) and a stop portion (231) arranged at one end of the rod body (230), the other end of the rod body (230) is fixed on the end wall of the cover (2), the partition (20) is sleeved on the rod body (230) and is limited at the lower end by the stop portion (231), and the third spring (22) is sleeved on the rod body (230) and abuts against the end wall at one end and abuts against the partition (20) at the other end.

4. Brake pedal simulator (411) according to any one of claims 1 to 3, characterized in that The end wall of the cover (2) is provided with a limiting column (24), the rod body (230) is inserted and fixed in the inner cavity of the limiting column (24), and the limiting column (24) is used for limiting the upper end of the partition (20).

5. Brake pedal simulator (411) according to claim 4, characterized in that ​ 6. Brake pedal simulator (411) according to any one of claims 1 to 5, characterized in that ​ 7. Brake pedal simulator (411) according to claim 6, characterized in that ​ 8. Brake pedal simulator (411) according to claim 7, characterized in that An end of the ejector rod (23) away from the stop (231) is provided with a radial protruding clamping protrusion (232) to fix the ejector rod (23) in the limiting column (24).

9. Brake pedal simulator (411) according to any one of claims 6 to 8, characterized in that The piston (10) moves axially in the piston cavity (14) between a first position and a second position, wherein, In the first position, the piston cavity (14) surrounds at most a first sub-region (T1) of the piston (10), and in the second position, the piston cavity (14) surrounds at least a second sub-region (T2) of the piston (10), and wherein the first sub-region (T1) is larger than the second sub-region (T2).

10. Brake pedal simulator (411) according to claim 9, characterized in that 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).

11. Brake pedal simulator (411) according to claim 9 or 10, characterized in that The inner wall of the cover (2) is provided with a limiting boss (221) for limiting the movement of the partition (20) and the piston (10) to ensure the length of the second sub-region (T2).

12. Brake pedal simulator (411) according to any one of claims 9 to 11, characterized in that In the first position, a first gap (100) is formed between the partition (20) and the piston (10), and a second gap (104) is formed between the first spring (11) and the ejector rod (23), and the first gap (100) is not greater than the second gap (104).

13. Brake pedal simulator (411) according to any of claims 1-12, characterized in that, The main body (1) is provided with an oil outlet (13), and a flow passage (15) is arranged between the inner wall of the cover (2) and the outer wall of the piston (10) to communicate the inner cavity of the cover (2) with the oil outlet (13).

14. Brake pedal simulator (411) according to claim 13, characterized in that The opening of the piston cavity (14) is provided with a third step portion (141), the lower end of the cover (2) abuts against the third step portion (141), and the projections of the inner wall of the cover (2) and the outer wall of the piston (10) on a plane perpendicular to the axial direction are arranged apart to form the flow passage (15).

15. Brake pedal simulator (411) according to claim 13 or 14, characterized in that The oil outlet (13) is used to communicate with an oil pot (412), and an oil groove (131) is arranged on the inner circumferential wall of the main body (1) to communicate with the oil outlet (13), and the fluid in the oil pot (412) can flow back to the inner cavity of the cover (2) through the oil outlet (13), the flow passage (15) and the oil groove (131) in sequence.

16. Brake pedal simulator (411) according to any one of claims 13 to 15, characterized in that The partition (20) is a disc-shaped structure with a through hole (200) in the center, and a flow-through portion (2000) is formed between the outer edge of the disc-shaped structure and the inner wall of the cover (2), and the flow-through portion (2000) communicates with the flow passage (15).

17. Brake pedal simulator (411) according to claim 16, characterized in that The partition (20) is a disc, and the flow-through portion (2000) includes a flow-through groove (201) arranged on the outer periphery of the disc, the flow-through grooves (201) are arranged in a circumferential direction and open towards the inner wall of the cover (2).

18. Brake pedal simulator (411) according to claim 16 or 17, characterized in that The partition (20) has alternating arc-shaped edges (202) and straight edges (203), and at least the straight edges (203) and the inner wall of the cover (2) leave a third gap (105) to form the overflow part (2000).

19. Brake pedal simulator (411) according to any of claims 13 to 18, characterized in that The side wall of the piston (10) is provided with an opening (1001) which is in communication with the overflow channel (15).

20. Brake pedal simulator (411) according to any of claims 1 to 19, characterized in that The main body (1) is provided with an oil inlet (12) and an oil outlet (13), the oil inlet (13) is in communication with the piston cavity (14) and forms a high-pressure channel, the oil outlet (12) is in communication with the inner cavity of the cover (2) and forms a low-pressure channel, and the piston (10) is arranged in the piston cavity (14) and can separate the low-pressure channel and the high-pressure channel.

21. Brake pedal simulator (411) according to claim 20, characterized in that The inner wall of the main body (1) and the piston (10) are provided with a sealing element (3), and the oil inlet (12) and the oil outlet (13) are respectively located on the two sides of the sealing element (3).

22. A brake assembly (41) characterized by, The brake pedal simulator (411) of any one of claims 1-21.

23. A vehicle (4) characterized by The brake assembly (41) of claim 22.

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