Brake pedal simulator, brake assembly and vehicle

Abstract

The invention relates to a brake pedal simulator, a brake assembly and a vehicle, the brake pedal simulator comprises a main body part, the main body part is provided with a piston cavity, a piston capable of moving axially is arranged in the piston cavity, and a first spring is arranged in an inner cavity of the piston; the cover body is buckled on the main body part and is used for sealing the piston cavity, a movable separator is arranged in the cover body, the separator is positioned above the first spring and is opposite to the opening of the inner cavity of the piston, a second spring is arranged between the piston and the separator, and a third spring is arranged between the cover body and the separator. The invention provides a three-stage spring arrangement mode, the weight of the pedal force value provided by the first spring can be reduced, foot sensing force value feedback can be better provided, and force value changes in high-temperature and low-temperature environments are obviously improved. Two of the three springs directly act on the piston, the rigidity of the spring in the piston can be increased, the rigidity difference between the spring and the third spring outside the piston can be reduced, force value change is smoother, the overall size is reduced, and the structure is more compact.

Description

Technical Field

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

[0002] The brake pedal simulator is used to provide the driver with the pedal feel he needs when the car brakes. The actual braking force comes from the brake motor, achieving complete decoupling. The feedback of the pedal feel needs to be achieved through the elastic parts in the pedal simulator.

[0003] In the related art, the pedal feel of the pedal simulator is mainly provided by rubber springs, which are more sensitive to temperature changes. When the temperature drops in winter, the rubber temperature becomes lower and the hardness becomes higher, and the pedal force value cannot meet the requirements. Summary of the invention

[0004] The purpose of the present disclosure is to provide a brake pedal simulator, a brake assembly and a vehicle to solve the problem in the related art that the pedal force requirement cannot be met in a low temperature environment.

[0005] In order to achieve the above object, the present disclosure provides a brake pedal simulator, comprising: A main body, wherein the main body is provided with a piston cavity, an axially movable piston is provided in the piston cavity, and a first spring is provided in the inner cavity of the piston; A cover body is buckled on the main body and used to close the piston cavity. A movable partition is provided in the cover body, wherein the partition is located above the first spring and is arranged opposite to the inner cavity opening of the piston, a second spring is provided between the piston and the partition, and a third spring is provided between the cover body and the partition.

[0006] Optionally, the brake pedal simulator has at least: In a first working process, a first gap is formed between the piston and the partition, and the piston moves toward the cover body to compress the second spring; and In the second working process, the piston abuts against the partition, and the piston continues to move and compresses the third spring and the first spring.

[0007] Optionally, a first step portion is provided on the outer wall of the piston, the second spring is sleeved on the outer wall of the piston and arranged on the first step portion, and a first gap is formed between the partition and the piston.

[0008] Optionally, a second step portion is provided on the inner wall of the piston, the second spring is located inside the piston with one end abutting against the second step portion and the other end abutting against the partition, and a first gap is formed between the partition and the piston.

[0009] Optionally, a seal is provided between the inner wall of the main body and the piston, and the length from the second step portion to the top wall of the piston is greater than the distance from the seal to the top wall of the piston.

[0010] Optionally, 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, and the other end of the rod body is fixed to the end wall of the cover body. The partition can be axially movably mounted on the rod body and is lowered by the stop portion. The third spring is mounted on the rod body with one end abutting against the end wall and the other end abutting against the partition.

[0011] Optionally, 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 positioning on the partition.

[0012] Optionally, a radially protruding locking protrusion is provided at one end of the push rod away from the stop portion to fix the push rod in the limiting column.

[0013] Optionally, the piston moves axially in the piston chamber between a first position and a second position, wherein: In the first position, the piston cavity surrounds at most one first sub-region of the piston, and 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.

[0014] 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.

[0015] Optionally, a limiting boss is provided on the inner wall of the cover body, and the limiting boss is used to limit the movement of the partition and the piston to ensure the length of the second sub-area.

[0016] Optionally, in the first position, a first gap is formed between the partition and the piston, a second gap is formed between the first spring and the push rod, and the first gap is not larger than the second gap.

[0017] Optionally, the main body is provided with an oil outlet, and a flow channel connecting the inner cavity of the cover body and the oil outlet is provided between the inner wall of the cover body and the outer wall of the piston.

[0018] Optionally, a third step portion is provided at the opening of the piston cavity, and the lower end of the cover body is provided with a flange folded outward and abutting against the third step 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 arranged at intervals to form the flow channel.

[0019] Optionally, the oil outlet is used to be connected to an oil pot, and an oil groove connected to the oil outlet is provided on the inner circumferential 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.

[0020] Optionally, the separator is a disc-shaped structure with a through hole at the center, 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.

[0021] Optionally, the separator is a disc, and the flow portion includes a flow groove provided on the outer circumference of the disc, and the flow groove is a plurality of grooves arranged at intervals along the circumferential direction and has an opening toward the inner wall of the cover body.

[0022] Optionally, the partition has arcuate edges and straight edges that are alternately arranged, and a gap is left between the straight edge and the inner wall of the cover body to form the flow-through portion.

[0023] Optionally, an opening is provided on the side wall of the piston, and the opening is communicated with the flow channel.

[0024] Optionally, the main body is provided with an oil inlet and an oil outlet, the oil inlet is connected with the piston cavity to form a high-pressure channel, the oil outlet is connected with the inner cavity of the cover body to form a low-pressure channel, and the piston is arranged in the piston cavity and can separate the low-pressure channel and the high-pressure channel.

[0025] Optionally, a sealing member is provided between the inner wall of the main body and the piston, and the oil inlet and the oil outlet are respectively located on two sides of the sealing member.

[0026] According to a second aspect of the present disclosure, a brake assembly is provided, comprising the above-mentioned brake pedal simulator.

[0027] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned brake assembly.

[0028] Through the above technical solution, compared with the embodiment with only a rubber spring or a return spring and a rubber spring, the present disclosure provides a three-stage spring arrangement including two springs and a rubber spring, which can reduce the weight of the rubber spring providing the pedal force value, better provide the foot feel force value feedback, and significantly improve the force value change under high 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 spring inside the piston can be increased, and the stiffness difference with the third spring outside the piston can be reduced, so that the force value change is smoother, and the overall volume can be reduced, making the structure more compact.

[0029] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: 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 yes Figure 3 Schematic diagram of the oil return path.

[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 1 is a schematic structural diagram of a piston in a first position and a second position in a brake pedal simulator provided by a second exemplary embodiment of the present disclosure.

[0035] Fig. 9 Schematic diagram of a partition in a brake pedal simulator provided by an exemplary embodiment of the present disclosure.

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

[0037] Figures 11 to 13 Schematic diagram of the structure of the piston provided by different exemplary embodiments of the present disclosure.

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

[0039] Fig.15 yes Fig.14 Schematic diagram of the oil return path.

[0040] Description of Reference Numerals 1-main body; 10-piston; 100-first gap; 101-first step; 102-second step; 11-first spring; 12-oil inlet; 13-oil outlet; 131-oil groove; 14-piston cavity; 141-third step; 15-flow channel; 1000-main body; 1001-opening; 1002-slot; 2-cover; 20-partition; 200-through hole; 201-flow groove; 202-arc edge; 203-straight edge; 21-second spring; 22-third spring; 221-limiting boss; 23-thrust rod; 231-stopper; 24-limiting column; 3-seal. DETAILED DESCRIPTION

[0041] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0042] In this disclosure, unless otherwise stated, directional words 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, and "inner, outer" refer to the inner and outer of the corresponding component contour. In addition, when the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The terms "first", "second", etc. used in this disclosure are to distinguish one element from another and do not have order or importance.

[0043] In this disclosure, Figures 1 to 6 As shown, a brake pedal simulator is provided, which includes a hydraulic unit (main body 1) and a simulator unit (cover body 2), the main body 1 is provided with a piston cavity 14, and a piston 10 that can move axially is provided in the piston cavity 14, the main body 1 can be a hydraulic block, a master cylinder, etc., the main body 1 is provided with an oil inlet 12 and an oil outlet 13, the oil inlet 12 is connected to the piston cavity 14, the oil outlet 13 is connected to the inner cavity of the cover body 2 and the inner cavity of the piston 10, a seal 3 is provided between the inner wall of the main body 1 and the piston 10, and 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 cavity 14, the inner cavity of the cover body 2 and the inner cavity of the piston 10, respectively, the brake fluid 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 channel where the oil inlet 12 and the oil outlet 13 are located.

[0044] The hydraulic pressure of the oil inlet 12 is controlled by the brake pedal, and the oil outlet 13 is used to communicate with the 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 cavity 14, driving the piston 10 to move upward. At this time, when the hydraulic pressure in the inner cavity 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 cavity of the cover body 2 and the piston 10 to the oil pot 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 cavity 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 to the inner cavity of the cover body 2 and the piston 10 through the oil outlet 13 to return the oil. At this time, if the oil return is not timely, the piston 10 will be stuck and other problems. When the driver steps on the brake pedal, the oil inlet 12 is located in the high-pressure channel, and the oil outlet 13 is located in the low-pressure channel. The piston 10 is arranged in the piston cavity 14 and can separate the low-pressure channel and the high-pressure channel. When the pedal is stepped on, the flow rate of the low-pressure channel will also affect the foot feel force feedback. The inner peripheral wall of the main body 1 is provided with a leather cup groove, and the seal 3 is placed in the leather cup groove.

[0045] Based on the above, the brake simulator provided by the present disclosure mainly involves the following improvements. Specifically, Three-stage spring (first spring 11 + second spring 21 + third spring 22) In this disclosure, Figure 2 As shown, a first spring 11 is provided in the inner cavity of the piston 10, and the first spring 11 can be a rubber spring. The cover body 2 is buckled on the main body 1 to close the piston cavity 14, and a movable partition 20 is provided 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 of the piston 10, a second spring 21 is provided between the piston 10 and the partition 20, and a third spring 22 is provided between the cover body 2 and the partition 20.

[0046] Compared with the embodiments in which only a rubber spring or a return spring and a rubber spring are provided, the present disclosure provides a three-stage spring arrangement including two springs and a rubber spring. Originally, the pedal force value was only or mostly provided 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, and better feedback of the foot feel force value can be provided, which has a significant improvement on the force value change in high 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 with the third spring 22 outside the piston, making the force value change smoother, and at the same time reducing the overall volume, making the structure more compact.

[0047] The brake pedal simulator provided by the present disclosure has at least: a first working process, in which a first gap 100 is provided between the piston 10 and the partition 20, and the piston 10 moves toward 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 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 is not provided only by the first spring 11, but by the second spring 21 in the first stage and by the third spring 22 and the first spring 11 in the second stage, and the force value changes more smoothly. The changes in the brake fluid in the two processes will be defined below in conjunction with the specific structure.

[0048] In the first exemplary embodiment of the present disclosure, Figure 2 and Figure 3 As shown, a first step portion 101 is provided on the outer wall of the piston 10, and a second spring 21 is sleeved on the outer wall of the piston 10 and arranged on the first step portion 101 to form a pre-compression, 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 to avoid deviation or tilt during the compression process.

[0049] In a second exemplary embodiment of the present disclosure, Figure 5 and Figure 6 As shown, a second step portion 102 is provided on the inner wall of the piston 10, a second spring 21 is located inside the piston 10 and one end abuts against the second step portion 102, and the other end abuts against the partition 20, a first gap 100 is formed between the partition 20 and the piston 10, and the first spring 11 is at least partially located in the inner cavity of the second spring 21. The second spring 21 and the first spring 11 are both arranged inside the piston 10. In this embodiment, the second spring 21 can be designed to be longer, and the length from 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 seal 3 to the top wall of the piston 10, that is, the second step portion 102 can be arranged below the seal 3, effectively preventing the third spring 22 from being too high and causing the piston 10 to tilt.

[0050] The first spring 11 may be a special-shaped structure. For example, the upper portion of the first spring 11 may be designed as a tapered structure such as a cone or a truncated cone. Figure 5 In the illustrated embodiment, it is more convenient to install the second spring 21 without interfering with the compression of the second spring 21. The second spring 21 and the third spring 22 can be a coil spring, a butterfly spring, a volute spring, etc. Compared with a disc spring structure, a coil spring is cheaper and has a lower processing and manufacturing cost.

[0051] To realize the installation of the separator 20 and the third spring 22, in the present disclosure, as shown in FIG. Figure 2As shown, a push rod 23 is installed in the cover body 2. The push rod 23 has a rod body and a stopper 231 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 2. The partition 20 can be axially movably sleeved on the rod body and is lowered by the stopper 231. The third spring 22 is sleeved on the rod body and one end abuts on the end wall and the other end abuts on the partition 20. The push rod 23 can be a T-shaped structure. The third spring 22 and the partition 20 are both penetrated by the push rod 23 to fix them in the inner cavity of the cover body 2 so that they cannot escape from the cover body 2. The end of the push rod 23 away from the stopper 231 is provided with a radially protruding clamping protrusion, which can be designed as a conical structure. The conical structure is interference-fitted 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 body 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 the push rod 23 does not need to be designed to be too long. The center of gravity of the piston 10 and the push rod 23 is located on the same axis, and no eccentric wear will occur during the movement of the piston 10. The partition 20 can be installed on the push rod 23 so as to move up and down, replacing the traditional push rod, reducing the use of parts and reducing costs. Compared with the embodiment of the related art in which the push rod is pressed into the piston with interference fit, the embodiment provided by the present disclosure can solve the problems of difficult control of pressing control, easy deformation of the piston, and easy occurrence of brake failure.

[0052] In the first exemplary embodiment of the present disclosure, Figure 2 As shown, a limit post 24 is provided on the end wall of the cover body 2, and the rod body is inserted into and fixed in the inner cavity of the limit post 24. The limit post 24 is used to limit the separator 20. When the separator 20 and the piston 10 move to the limit post 24, they can play a limiting role to prevent the first spring 11 from being damaged by overpressure. When the separator 20 moves to the limit post 24, the full stroke of the brake pedal simulator is reached.

[0053] In a second exemplary embodiment of the present disclosure, Figure 6 and Figure 8 As shown, a limiting boss 221 is provided on the inner wall of the cover body 2, and the limiting boss 221 is used to limit the movement of the partition 20 and the piston 10, and can also play a limiting role to prevent damage to the first spring 11 due to overpressure, while also ensuring the length of the second sub-area T2 described below.

[0054] The piston 10 moves axially in the piston chamber 14 between a first position and a second position, wherein in the first position (eg Figure 7 As shown in FIG. 1 ), the piston chamber 14 surrounds at most a first sub-region T1 of the piston 10, and in the second position (as shown in FIG. Figure 8As shown in the figure, the piston cavity 14 surrounds at least one second sub-region T2 of the piston 10, and 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 the piston 10 tilting due to the envelope length being too small, and both can be designed according to the length of the piston 10. The first sub-region T1 and the second sub-region T2 here are respectively the limits of the extreme design of the piston 10 at two positions, and in the extreme case, T1>T2 can be satisfied, and the envelope length of the piston 10 can be guaranteed.

[0055] 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 the piston 10 from having an excessively long stroke, resulting in poor sealing at the location of the seal 3.

[0056] 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 push rod 23, and the first gap 100 is not larger 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 only the second spring 21 is compressed in the first process. By designing the second gap, it can be realized that when the piston 10 abuts against the partition 20, only the third spring 22 is compressed, or the third spring 22 and the first spring 11 are compressed at the same time. Therefore, the working process of the brake pedal simulator is at least the two working processes described above.

[0057] A flow channel is designed between the inner wall of the cover and the outer wall of the piston to increase oil return efficiency like Figure 3 and Figure 4 As shown, the main body 1 is provided with an oil outlet 13, and a flow channel 15 is provided between the inner wall of the cover body 2 and the outer wall of the piston 10 to connect 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, driving the piston 10 to move upward. At this time, the piston 10 does not contact the partition 20, and first compresses the second spring 21. The second spring 21 is deformed by the force and provides pedal feedback. When the piston 10 contacts the partition 20, the piston 10 pushes the partition 20 to move upward together, and at the same time compresses the third spring 22 and the first spring 11 until it moves 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, and the brake fluid flows out to the oil pot through the flow channel 15 and the oil outlet 13. The design of the flow channel 15 allows the brake fluid to 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 body 2 and the inner cavity of the piston 10 through the oil outlet 13 and the flow channel 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 getting stuck is avoided.

[0058] Regarding the formation method of the flow passage 15, in the present disclosure, as Figure 3 As shown, the opening of the piston cavity 14 is provided with a third step 141, and the lower end of the cover body 2 is provided with a flange folded outward and abutting against the third step 141, so that the inner wall of the cover body 2 and the outer wall of the piston 10 are arranged at intervals and form a flow passage 15. The third step 141 can be Figure 3 The first step shown can also Figure 5 The second step shown, Figure 3 In the embodiment shown, the position where the flange abuts can be opened under the hydraulic pressure in the cover body 2 to allow the oil to flow to the oil outlet 13, and at the same time, the sealing performance at the position where the cover body 2 and the main body 1 can be connected is better. Figure 5 In the illustrated embodiment, the lower portion of the cover body 2 can be made thinner while the limiting boss 221 is formed, thereby forming a flow passage 15 between the cover body 2 and the piston 10 .

[0059] exist Figure 3 and Figure 5 In the embodiment shown, an oil groove 131 connected to the oil outlet 13 is provided on the inner peripheral wall of the main body 1, and the fluid in the inner cavity of the cover body 2 can sequentially pass through the flow channel 15, the oil groove 131 and flow out to the oil pot through the oil outlet 13, and accordingly, oil return can also be achieved. The oil groove 131 can be an annular oil groove surrounding the main body 1, or a semi-arc shape or other shapes. The oil groove 131 can increase the flow rate, which plays an important role in improving the overall foot feel, and the force value changes more smoothly.

[0060] The separator is designed as a flow-through part, which is connected to the flow-through channel In the above embodiment, the axial diameter of the separator 20 can be smaller than the inner diameter of the cover 2, and a gap is formed between the separator 20 and the inner wall of the cover 2, which will not affect the flow of the brake fluid to the flow channel 15. Figure 5 As shown, the separator 20 is a disc-shaped structure with a through hole 200 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 2, and the flow portion is connected to the flow channel 15. The brake fluid in the inner cavity of the piston 10 can enter the inner cavity of the cover body 2 through the through hole 200, and the brake fluid in the inner cavity of the cover body 2 can pass through the flow portion on the separator 20 to the flow channel 15 and flow out from the oil outlet 13 to the oil pot, or reverse to realize oil return.

[0061] like Fig. 9 As shown, the separator 20 may be a disc, and the flow portion includes a flow groove 201 disposed on the outer circumference of the disc. The flow groove 201 may be a plurality of flow grooves arranged at intervals along the circumferential direction, and the opening faces the inner wall of the cover body 2. Fig.10As shown, the cross section of the separator 20 can be an irregular structure, and the separator 20 has an arc edge 202 and a straight edge 203 arranged alternately, and a gap is left between the straight edge 203 and the inner wall of the cover 2 to form a flow portion. The gap formed by the flow hole, the flow groove 201, and the straight edge 203 can make the brake fluid flow to the flow channel 15 faster, increase the flow rate, further improve the reflux efficiency, improve the shortcoming of insufficient flow of the brake pedal simulator when the pedal is pressed quickly, and solve the problem of hardening of the pedal.

[0062] The piston side has holes to improve oil return efficiency In the present disclosure, in order to further improve the oil return efficiency, as Figures 11 to 13 As shown, the present disclosure has designed a structure for the piston 10, and the piston 10 has a body 1000 and a flow structure provided on the body 1000 to connect the outside with the inner cavity of the piston 10. The brake fluid in the inner cavity of the piston 10 can flow out directly through the flow structure on the piston to ensure smooth oil discharge. Fig.14 and Fig.15 As shown, the flow structure is arranged on the side wall of the piston 10, and can be connected to the flow channel 15. In other embodiments, it can also be connected to the oil outlet 13. Fig.15 Taking the embodiment shown as an example, when returning oil, the brake fluid entering the flow channel 15 from the oil outlet 13 through the oil groove 131 is divided into two paths of oil return, one path directly flows back to the inner cavity of the piston 10 through the flow structure on the piston 10, and the other path flows through the flow channel 15 and the flow portion (such as the flow groove 201) on the separator 20 to the inner cavity of the cover body 2 to return oil. By designing the flow structure on the piston 10, the brake fluid in the flow channel 15 can directly return to the inner cavity of the piston 10, shortening the flow path, and returning faster. The inner cavity of the cover body 2 and the inner cavity of the piston 10 return oil at the same time, further improving the oil return efficiency. Here, when the piston 10 is in the first position, the flow structure can be located above the oil outlet 13, otherwise it is necessary to consider the alignment with the oil outlet 13.

[0063] In an exemplary embodiment of the present disclosure, Fig.11 As shown, the flow structure includes an opening 1001 opened on the side wall of the main body 1000. In another exemplary embodiment of the present disclosure, as Fig.12 As shown, the main body 1000 is constructed as a cylindrical structure with an open top and a closed bottom, and the flow structure includes a slot 1002 opened on the end surface of the main body 1000. Fig.13 As shown, the present disclosure also includes an embodiment in which both the opening 1001 and the groove 1002 are designed on the main body 1000 .

[0064] In the above embodiment, the slots 1002 and / or the openings 1001 may be multiple and arranged at intervals along the circumference of the body 1000. The shapes of the openings 1001 and the slots 1002 are not specifically limited, and may be circular holes, square holes, irregular shapes, arc grooves, sawtooth grooves, etc., all of which belong to the protection scope of the present disclosure.

[0065] According to a second aspect of the present disclosure, a brake assembly is provided, including the brake pedal simulator introduced above. The brake assembly has all the beneficial effects of the above brake pedal simulator, which will not be described in detail here.

[0066] According to a third aspect of the present disclosure, a vehicle is provided, comprising the brake assembly described above. The vehicle has all the beneficial effects of the brake pedal simulator and the brake assembly described above, and no further elaboration is given here.

[0067] The preferred embodiments of the present disclosure are 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 technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0068] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0069] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A brake pedal simulator, characterized in that: include: A main body, wherein the main body is provided with a piston cavity, an axially movable piston is provided in the piston cavity, and a first spring is provided in the inner cavity of the piston; A cover body is buckled on the main body and used to close the piston cavity. A movable partition is provided in the cover body, wherein the partition is located above the first spring and is arranged opposite to the inner cavity opening of the piston, a second spring is provided between the piston and the partition, and a third spring is provided between the cover body and the partition.

2. The brake pedal simulator according to claim 1, characterized in that: The brake pedal simulator at least comprises: In a first working process, a first gap is formed between the piston and the separator, and the piston moves toward the cover body to compress the second spring; as well as In the second working process, the piston abuts against the partition, and the piston continues to move and compresses the third spring and the first spring.

3. The brake pedal simulator according to claim 1, characterized in that: A first step portion is provided on the outer wall of the piston, the second spring is sleeved on the outer wall of the piston and arranged on the first step portion, and a first gap is formed between the partition and the piston.

4. The brake pedal simulator according to claim 1, characterized in that: A second step portion is provided on the inner wall of the piston. The second spring is located inside the piston with one end abutting against the second step portion and the other end abutting against the partition. A first gap is formed between the partition and the piston.

5. The brake pedal simulator according to claim 4, characterized in that: A sealing member is provided between the inner wall of the main body and the piston, and a length from the second step portion to the top wall of the piston is greater than a distance from the sealing member to the top wall of the piston.

6. The brake pedal simulator according to claim 1, 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 third spring is sleeved on the rod body and one end abuts against the end wall and the other end abuts against the partition.

7. The brake pedal simulator according to claim 6, 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.

8. The brake pedal simulator according to claim 7, characterized in that: One end of the push rod away from the stop portion is provided with a radially protruding clamping protrusion to fix the push rod in the limiting column.

9. The brake pedal simulator according to claim 6, characterized in that: The piston moves axially in the piston chamber between a first position and a second position, wherein: In the first position, the piston cavity surrounds at most one first sub-region of the piston, and 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.

10. The brake pedal simulator according to claim 9, characterized in that: 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.

11. The brake pedal simulator according to claim 9, characterized in that: A limiting boss is provided on the inner wall of the cover body, and the limiting boss is used to limit the movement of the partition and the piston to ensure the length of the second sub-area.

12. The brake pedal simulator according to claim 9, characterized in that: In the first position, a first gap is formed between the partition and the piston, a second gap is formed between the first spring and the push rod, and the first gap is not larger than the second gap.

13. The brake pedal simulator according to any one of claims 1 to 12, characterized in that: The main body is provided with an oil outlet, and a flow passage communicating the inner cavity of the cover body and the oil outlet is provided between the inner wall of the cover body and the outer wall of the piston.

14. The brake pedal simulator according to claim 13, characterized in that: A third step portion is provided at the opening of the piston cavity, the lower end of the cover body abuts against the third 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.

15. The brake pedal simulator according to claim 13, 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.

16. The brake pedal simulator according to claim 13, 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.

17. The brake pedal simulator according to claim 16, 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.

18. The brake pedal simulator according to claim 16, characterized in that: The partition has arc edges and straight edges that are alternately arranged, and at least a gap is left between the straight edges and the inner wall of the cover body to form the flow-through portion.

19. The brake pedal simulator according to claim 13, characterized in that: An opening is provided on the side wall of the piston, and the opening is communicated with the flow passage.

20. The brake pedal simulator according to claim 1, characterized in that The main body is provided with an oil inlet and an oil outlet, the oil inlet is connected with the piston cavity to form a high-pressure channel, the oil outlet is connected with the inner cavity of the cover body to form a low-pressure channel, and the piston is arranged in the piston cavity and can separate the low-pressure channel and the high-pressure channel.

21. The brake pedal simulator according to claim 20, characterized in that: A sealing member is provided between the inner wall of the main body and the piston, and the oil inlet and the oil outlet are respectively located on two sides of the sealing member.

22. A brake assembly, characterized in that: A brake pedal simulator comprising any one of claims 1-21.

23. A vehicle, characterized in that: Includes the brake assembly as described in claim 22.

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