Pedal simulator and vehicle

Abstract

The invention discloses a pedal simulator and a vehicle, and belongs to the technical field of pedal simulators. According to the pedal simulator and the vehicle, compared with the prior art, an external oil can is omitted, the hydraulic medium is sealed in the first cavity, the second cavity and the third cavity of the shell, and circulation of the hydraulic medium is formed among the first cavity, the second cavity and the third cavity through the first channel, the second channel and the third channel; due to the fact that the first cavity, the second cavity and the third cavity are all separated from outside air, the first piston starts to move to generate hydraulic force, then the third piston can be smoothly pushed to move, sudden change of pedal force is avoided, smoother pedal feeling can be provided, performance is more stable, and the overall structure is more compact.

Description

Technical Field

[0001] The present invention relates to the technical field of pedal simulators, and in particular to a pedal simulator and a vehicle. Background Art

[0002] The brake pedal feel of a traditional car is usually provided by a vacuum booster and the hydraulic pressure of the brake master cylinder. The pedal feel usually refers to the relationship between the pedal force, pedal travel, and the braking deceleration of the entire vehicle when the driver steps on the brake pedal.

[0003] With the popularization of new energy vehicles, more and more new energy vehicles use electronically controlled boosters, especially with the emergence of wire-controlled brakes, which decouple the brake pedal from the brake hydraulics. A special pedal feel simulator is needed to simulate the relationship between pedal travel and pedal force in order to provide a pedal feel.

[0004] At present, the pedal simulators used in conjunction with the wire control brake system are still structures with external oil pots, which are large in size and affect the overall structural layout and optimization. In this type of pedal simulator, before the master cylinder piston overcomes the idle stroke S, no hydraulic pressure is generated inside the cavity. After overcoming the idle stroke S, hydraulic pressure begins to be generated to push the simulation cavity piston to move. Figure 1 As shown, when the simulation chamber piston starts to move, because the simulation chamber piston has the existence of the initial installation force and the friction force, there will be a force fluctuation on the input push rod when overcoming these two force values. When the driver steps on the brake pedal and overcomes the position of the idle stroke S, the driver's foot will also feel a sudden change in pedal force, resulting in a poor driving experience. Summary of the invention

[0005] The purpose of the present invention is to provide a pedal simulator and a vehicle, which can provide a smoother pedal feel and enhance the driving experience.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] A pedal simulator, comprising:

[0008] A housing, the housing comprising a first chamber, a second chamber, a third chamber, a first channel, a second channel and a third channel, all of which are sealed, and hydraulic medium is provided in the first chamber and the third chamber;

[0009] A first reaction force assembly includes a first piston and a first elastic structure, wherein the first piston is slidably disposed in the first cavity along its axial direction, and two ends of the first elastic structure are respectively connected to the first piston and the housing, and the first piston can slide under the action of the brake pedal to apply force to the first elastic structure and the hydraulic medium in the first cavity;

[0010] a sealing structure, wherein the sealing structure is configured to connect the first chamber with the second chamber through the first channel when the sliding stroke of the first piston under the action of the brake pedal is not greater than a preset stroke S1; the sealing structure is also configured to disconnect the first channel when the sliding stroke of the first piston under the action of the brake pedal is greater than the preset stroke S1;

[0011] A second reaction force assembly includes a second piston and a second elastic structure, wherein the second piston is slidably disposed in the second cavity along its axial direction, and two ends of the second elastic structure are respectively connected to the second piston and the housing, and the second piston can slide under the action of the hydraulic medium entering the second cavity through the first channel to apply force to the second elastic structure;

[0012] The third reaction force component includes a third piston and a third elastic structure. The third piston is slidably arranged in the third cavity along its axial direction. The third piston separates the third cavity into cavity three and cavity four which are not connected to each other. The cavity three is connected to the first cavity through the second channel, and the cavity four is connected to the second cavity through the third channel. The two ends of the third elastic structure are respectively connected to the third piston and the shell. The third piston can slide under the action of the hydraulic medium entering the cavity three through the second channel to apply force to the third elastic structure and the hydraulic medium in the cavity four.

[0013] As a preferred technical solution of the pedal simulator, the sealing structure includes a first sealing member installed on the inner wall of the first cavity, the first sealing member is sleeved on the outer side of the first piston, the first sealing member can separate the first cavity into cavity 1 and cavity 2, the first channel is connected to the cavity 1, and the second channel is connected to the cavity 2;

[0014] The first piston is provided with an oil guide channel, one end opening of the oil guide channel is located in the second cavity, and the other end opening of the oil guide channel is located on the outer peripheral surface of the first piston;

[0015] When the sliding stroke of the first piston under the action of the brake pedal is not greater than the preset stroke S1, the first seal can make the other end opening of the oil guide channel connected with the cavity one; when the sliding stroke of the first piston under the action of the brake pedal is greater than the preset stroke S1, the first seal can make the other end opening of the oil guide channel disconnected from the cavity one.

[0016] As a preferred technical solution of the pedal simulator, the housing comprises a mounting structure, the mounting structure is adjustably arranged on the housing along the axial position of the third piston, and both ends of the third elastic structure are respectively connected to the mounting structure and the third piston; and / or,

[0017] The housing comprises a first mounting member, which is adjustably arranged on the housing along the axial position of the first piston, and two ends of the first elastic structure are respectively connected to the first mounting member and the first piston.

[0018] As a preferred technical solution of the above-mentioned pedal simulator, the third elastic structure includes a third elastic member and a fourth elastic member, one end of the third elastic member is connected to the mounting structure, and the other end is connected to one end of the fourth elastic member, and the other end of the fourth elastic member is connected to the third piston;

[0019] The elastic force of the third elastic member is smaller than the elastic force of the fourth elastic member.

[0020] As a preferred technical solution of the pedal simulator, the mounting structure includes:

[0021] a second mounting member, the second mounting member being adjustably disposed on the housing along the axial position of the third piston;

[0022] a third mounting member, wherein the third mounting member is adjustably arranged on the second mounting member along the axial position of the third piston;

[0023] A transition piece, wherein the transition piece is slidably connected to the third mounting piece along the axial direction of the third piston, one end of the third elastic piece is connected to the third mounting piece, and the other end is connected to the transition piece, and one end of the fourth elastic piece is connected to the transition piece.

[0024] As a preferred technical solution of the pedal simulator, the pedal simulator further comprises a fifth elastic member, the fifth elastic member is fixedly arranged in the cavity 4, and the adapter can abut against the fifth elastic member along the axial direction of the third piston; and / or,

[0025] The pedal simulator further includes a sixth elastic member, which is fixed to the cavity three. The third mounting member is provided with a connecting portion, which can abut against the sixth elastic member along the axial direction of the third piston.

[0026] As a preferred technical solution of the pedal simulator, the connecting portion is adjustably arranged on the third mounting member along the axial position of the third piston.

[0027] As a preferred technical solution of the above-mentioned pedal simulator, the pedal simulator further includes an input connector, one end of which is rotationally connected to the first piston, and the other end of which is used to be connected to the brake pedal.

[0028] As a preferred technical solution of the above-mentioned pedal simulator, the pedal simulator also includes a cover, an opening at one end of the cover is sleeved on the outside of the input connector, and an opening at the other end of the cover is connected to the shell, and the cover can be deformed as the input connector moves.

[0029] In order to achieve the above object, the present invention also provides a vehicle, comprising the pedal simulator as described in any one of the above items.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] Compared with the prior art, the pedal simulator and vehicle of the present invention eliminate the external oil pot, so that the hydraulic medium is sealed in the first chamber, the second chamber and the third chamber of the shell, and the hydraulic medium is circulated among the first chamber, the second chamber and the third chamber through the first channel, the second channel and the third channel. Since the first chamber, the second chamber and the third chamber are all separated from the external air, the first piston can generate liquid pressure when it starts to move, and then can smoothly push the third piston to move without sudden changes in pedal force. It can not only provide a smoother pedal feel, but also have more stable performance and a more compact overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A curve diagram of pedal force and brake pedal travel fed back by a pedal simulator in the prior art;

[0033] Figure 2 A schematic diagram of the structure of a pedal simulator in an embodiment of the present invention;

[0034] Figure 3 for Figure 2 A in the enlarged view;

[0035] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0036] Figure 5 is a schematic diagram of a first partial structure of a pedal simulator in an embodiment of the present invention;

[0037] Figure 6 A second partial structural schematic diagram of a pedal simulator in an embodiment of the present invention;

[0038] Figure 7 An exploded view of a pedal simulator in an embodiment of the present invention;

[0039] Figure 8 A first curve diagram of the pedal force and the brake pedal stroke fed back by the pedal simulator in an embodiment of the present invention;

[0040] Fig. 9 A second curve diagram of the pedal force and the brake pedal stroke fed back by the pedal simulator in an embodiment of the present invention;

[0041] Fig.10 is a third curve diagram of the pedal force and the brake pedal stroke fed back by the pedal simulator in an embodiment of the present invention;

[0042] Fig.11 This is a fourth curve diagram of the pedal force and brake pedal stroke fed back by the pedal simulator in an embodiment of the present invention.

[0043] Reference numerals:

[0044] 1. Shell; 11. First cavity; 111. Cavity 1; 112. Cavity 2; 113. Boss; 12. Second cavity; 13. Third cavity; 131. Cavity 3; 132. Cavity 4; 14. First channel; 15. Second channel; 16. Third channel; 171. First mounting member; 1711. Fifth sealing member; 172. Second mounting member; 1721. Sixth sealing member; 173. Third mounting member; 1731. Connecting member; 1732. Seventh sealing member; 174. Adapter; 2. First reaction force assembly; 21. First piston; 211. Limiting member ; 212, oil guide groove; 213, oil guide hole; 2131, first hole wall; 2132, second hole wall; 214, second sealing member; 22, first elastic member; 31, first sealing member; 311, sealing portion; 4, second reaction force assembly; 41, second piston; 411, third sealing member; 42, second elastic member; 5, third reaction force assembly; 51, third piston; 511, fourth sealing member; 521, third elastic member; 522, fourth elastic member; 61, fifth elastic member; 62, sixth elastic member; 7, input connector; 71, ball head; 8, cover body. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0048] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0052] like Figures 2 to 7 As shown, this embodiment provides a pedal simulator, including a shell 1, a first reaction force component 2, a sealing structure, a second reaction force component 4 and a third reaction force component 5, the shell 1 includes a first chamber 11, a second chamber 12, a third chamber 13, a first channel 14, a second channel 15 and a third channel 16, all of which are sealed, and hydraulic medium is provided in the first chamber 11 and the third chamber 13.

[0053] The first reaction force assembly 2 includes a first piston 21 and a first elastic structure. The first piston 21 is slidably disposed in the first chamber 11 along its axial direction. The two ends of the first elastic structure are respectively connected to the first piston 21 and the housing 1. The first piston 21 can slide under the action of the brake pedal to apply force to the first elastic structure and the hydraulic medium in the first chamber 11.

[0054] The sealing structure is configured so that when the sliding stroke of the first piston 21 under the action of the brake pedal is not greater than the preset stroke S1, the first chamber 11 and the second chamber 12 are connected through the first channel 14; the sealing structure is also configured so that when the sliding stroke of the first piston 21 under the action of the brake pedal is greater than the preset stroke S1, the first channel 14 is disconnected.

[0055] The second reaction force assembly 4 includes a second piston 41 and a second elastic structure. The second piston 41 is slidably arranged in the second chamber 12 along its axial direction. The two ends of the second elastic structure are respectively connected to the second piston 41 and the housing 1. The second piston 41 can slide under the action of the hydraulic medium entering the second chamber 12 through the first channel 14 to apply force to the second elastic structure.

[0056] The third reaction force assembly 5 includes a third piston 51 and a third elastic structure. The third piston 51 is slidably arranged in the third chamber 13 along its axial direction. The third piston 51 separates the third chamber 13 into a chamber three 131 and a chamber four 132 which are not connected to each other. The chamber three 131 is connected to the first chamber 11 through the second channel 15, and the chamber four 132 is connected to the second chamber 12 through the third channel 16. The two ends of the third elastic structure are respectively connected to the third piston 51 and the housing 1. The third piston 51 can slide under the action of the hydraulic medium entering the chamber three 131 through the second channel 15 to apply force to the third elastic structure and the hydraulic medium in the chamber four 132.

[0057] Compared with the prior art, the pedal simulator of this embodiment eliminates the external oil pot, so that the hydraulic medium is sealed in the first chamber 11, the second chamber 12 and the third chamber 13 of the housing 1, and the hydraulic medium is circulated among the first chamber 11, the second chamber 12 and the third chamber 13 through the first channel 14, the second channel 15 and the third channel 16. Since the first chamber 11, the second chamber 12 and the third chamber 13 are isolated from the external air, the first piston 21 can generate hydraulic pressure when it starts to move, and then the third piston 51 can be smoothly pushed to move. Figure 8 As shown, there will be no sudden change in pedal force, which not only provides a smoother pedal feel, but also has more stable performance and a more compact overall structure.

[0058] In this embodiment, continue to refer to Figures 2 to 4 The sealing structure includes a first sealing member 31 installed on the inner wall of the first cavity 11, the first sealing member 31 is sleeved on the outer side of the first piston 21, and the first sealing member 31 can separate the first cavity 11 into a cavity 1 111 and a cavity 2 112, the first channel 14 is connected to the cavity 1 111, and the second channel 15 is connected to the cavity 2 112; the first piston 21 is provided with an oil guide channel, one end of the oil guide channel is opened in the cavity 2 112, and the other end of the oil guide channel is opened on the outer peripheral surface of the first piston 21; when the sliding stroke of the first piston 21 under the action of the brake pedal is not greater than the preset stroke S1, the first sealing member 31 can The other end opening of the oil guide channel is connected to the cavity 111, so that the hydraulic medium in the cavity 112 can enter the cavity 111 through the oil guide channel, and flow through the first channel 14 into the second cavity 12; when the sliding stroke of the first piston 21 under the action of the brake pedal is greater than the preset stroke S1, the other end opening of the oil guide channel can be isolated from the cavity 111 by the first sealing member 31. In other words, the other end opening of the oil guide channel is not connected to the cavity 111 by the first sealing member 31, so that the hydraulic medium in the cavity 112 can no longer enter the second cavity 12 through the first channel 14.

[0059] Specifically, an annular boss 113 is provided on the inner wall of the first cavity 11 , and the first sealing member 31 is installed on the inner peripheral wall of the boss 113 . The boss 113 and the first piston 21 can clamp the first sealing member 31 to achieve sealing.

[0060] For ease of description, the opening of the oil guide channel located on the outer peripheral surface of the first piston 21 is recorded as the oil guide opening. The oil guide opening includes a first hole wall 2131 and a second hole wall 2132 that are relatively arranged. Along the direction in which the brake pedal applies force to the first piston 21, the first hole wall 2131 is closer to the first channel 14 than the second hole wall 2132.

[0061] Further, the first sealing member 31 includes a sealing portion 311 for abutting against the outer peripheral surface of the first piston 21. A limiting portion 211 is provided at one end of the first piston 21. When the brake pedal is not stepped on, the first piston 21 is located at an initial position. At this time, under the elastic force of the first elastic structure, the limiting portion 211 abuts against the boss 113 along the axial direction of the first piston 21, and the sealing portion 311 is located between the first hole wall 2131 and the second hole wall 2132. Along the axial direction of the first piston 21, the maximum distance between the first hole wall 2131 and the sealing portion 311 is a preset stroke S1. That is to say, when the brake pedal begins to be stepped on and the stroke of the first piston 21 is not greater than the preset stroke S1, the sealing portion 311 will not close the oil guide opening, and the hydraulic medium in the second cavity 112 can enter the first cavity 111 through the oil guide channel, and then enter the second cavity 12 through the first channel 14; when the stroke of the first piston 21 is greater than the preset stroke S1, the sealing portion 311 will press against the outer peripheral surface of the first piston 21 to close the oil guide opening, so that the hydraulic medium in the second cavity 112 can no longer enter the second cavity 112 through the oil guide channel, and no hydraulic medium can enter the second cavity 12 through the first channel 14, which is equivalent to disconnecting the first channel 14.

[0062] Specifically, the oil guide channel includes an oil guide groove 212 and an oil guide hole 213. The oil guide groove 212 is provided on the end surface of the first piston 21 located in the second cavity 112, and the oil guide hole 213 is provided on the outer peripheral surface of the first piston 21, and the oil guide hole 213 is connected to the oil guide groove 212. Optionally, one oil guide hole 213 may be provided, or two, three, four, or even more oil guide holes 213 may be provided, thereby increasing the oil guide amount and oil guide efficiency.

[0063] In other embodiments, the first seal 31 may be sleeved on the outer side of the first piston 21, and the first seal 31 is fixedly connected to the first piston 21, and the hydraulic medium is arranged in the second cavity 112. Further, when the sliding stroke of the first piston 21 under the action of the brake pedal is not greater than the preset stroke, one end opening of the first channel 14 is located in the second cavity 112, so that the hydraulic medium in the second cavity 112 can directly enter the first channel 14, and flow through the first channel 14 into the second cavity 12; when the sliding stroke of the first piston 21 under the action of the brake pedal is greater than the preset stroke, one end opening of the first channel 14 is located in the first cavity 111, so that the hydraulic medium in the second cavity 112 can no longer enter the second cavity 12 through the first channel 14.

[0064] Optionally, the shell 1 is provided with a first opening connected to the first chamber 11, one end of the first piston 21 is located in the first chamber 11, and the other end of the first piston 21 passes through the first opening and is located outside the shell 1, and a second seal 214 is sleeved on the outer side of the other end of the first piston 21, and the second seal 214 is fixed to the inner wall of the first opening, so that the first piston 21 and the inner wall of the first opening clamp the second seal 214 to seal the first opening, thereby improving the sealing effect of the first chamber 11.

[0065] Optionally, a third seal 411 is provided on the outer side of the second piston 41, thereby improving the sealing of the cavity three 131 and the cavity four 132, preventing the hydraulic medium from flowing between the cavity three 131 and the cavity four 132, which is beneficial to improving the smoothness of the pedal feel.

[0066] Optionally, a fourth sealing member 511 is sleeved on the outer side of the third piston 51, thereby preventing leakage of the hydraulic medium in the second chamber 12, and also facilitating improvement of the smoothness of the pedal feel.

[0067] Optionally, combined Figure 2 and Figure 7 As shown, the housing 1 includes a first mounting member 171, and the first mounting member 171 is adjustably arranged on the housing 1 along the axial position of the first piston 21. The two ends of the first elastic structure are respectively connected to the first mounting member 171 and the first piston 21, and then by adjusting the installation position of the first mounting member 171, the preload force of the first elastic structure can be adjusted, thereby adjusting the initial force value of the pedal force fed back by the pedal simulator to the brake pressure plate.

[0068] Exemplarily, the housing 1 is provided with a second opening communicating with the first chamber 11, the first mounting member 171 is blocked at the second opening, and the first mounting member 171 is threadedly connected to the housing 1, and the position of the first mounting member 171 along the axial direction of the first piston 21 can be adjusted by rotating the first mounting member 171, which is convenient to operate. Of course, the first mounting member 171 can also be slidably provided on the housing 1 along the axial direction of the first piston 21, and a first adjusting driving member is provided to drive the first mounting member 171 to slide, thereby adjusting the position of the first mounting member 171 along the axial direction of the first piston 21.

[0069] Optionally, a fifth sealing member 1711 is provided between the first mounting member 171 and the housing 1 , thereby improving the sealing performance of the first chamber 11 and preventing leakage of the hydraulic medium in the first chamber 11 .

[0070] Alternatively, if Figure 2As shown, the housing 1 includes a mounting structure, which is adjustably arranged on the housing 1 along the axial position of the third piston 51, and the two ends of the third elastic structure are respectively connected to the mounting structure and the third piston 51, so that by adjusting the mounting position of the mounting structure, the preload force of the third elastic structure can be adjusted, thereby achieving different pedal feels.

[0071] Optionally, the third elastic structure includes a third elastic member 521 and a fourth elastic member 522, one end of the third elastic member 521 is connected to the mounting structure, and the other end is connected to one end of the fourth elastic member 522, and the other end of the fourth elastic member 522 is connected to the third piston 51; the elastic force of the third elastic member 521 is less than the elastic force of the fourth elastic member 522, and then when the pressure medium entering the cavity three 131 through the second channel 15 pushes the third piston 51 to move, the third elastic member 521 can first provide a smaller reaction force to facilitate the increase of the brake pedal stroke, until the third elastic member 521 is compressed, and then the fourth elastic member 522 begins to be compressed to provide a larger reaction force. At this time, the speed of increase of the brake pedal stroke slows down to provide a comfortable driving experience.

[0072] Optionally, the mounting structure includes a second mounting member 172, a third mounting member 173 and an adapter 174, wherein the second mounting member 172 is adjustably arranged on the housing 1 along the axial position of the third piston 51; the third mounting member 173 is adjustably arranged on the second mounting member 172 along the axial position of the third piston 51; the adapter 174 is slidably connected to the third mounting member 173 along the axial direction of the third piston 51, one end of the third elastic member 521 is connected to the third mounting member 173, and the other end is connected to the adapter 174, and one end of the fourth elastic member 522 is connected to the adapter 174. In this way, the preload force of the third elastic member 521 and the fourth elastic member 522 can be adjusted to further adjust the pedal feel, meet the needs of different users, and have stronger versatility. At the same time, the adapter 174 supports the third elastic member 521, which is conducive to making the reaction force provided by the third elastic member 521 smoother.

[0073] Specifically, the adapter 174 is a sleeve with one end open and the other end closed. The sleeve is sleeved on the outside of the third mounting member 173 and is slidably connected to the third mounting member 173. The third elastic member 521 is arranged in the sleeve. The open end of the sleeve is provided with a mounting platform. The fourth elastic member 522 is sleeved on the outside of the sleeve. One end of the fourth elastic member 522 is connected to the mounting platform. The third elastic member 521 and the fourth elastic member 522 can be supported and limited by the sleeve to improve the installation stability of the third elastic member 521 and the fourth elastic member 522, so that the reaction force provided by the third elastic member 521 and the fourth elastic member 522 is smoother.

[0074] Optionally, the housing 1 is provided with a third opening communicating with the second chamber 12, the second mounting member 172 is blocked at the third opening, and the second mounting member 172 is threadedly connected to the housing 1, and the position of the second mounting member 172 along the axial direction of the second piston 41 can be adjusted by rotating the second mounting member 172, which is convenient for operation. Of course, the second mounting member 172 can also be slidably provided on the housing 1 along the axial direction of the second piston 41, and a second adjusting driving member is provided to drive the second mounting member 172 to slide, so as to adjust the position of the second mounting member 172 along the axial direction of the second piston 41.

[0075] Optionally, the second mounting member 172 is provided with a fourth opening communicating with the second chamber 12, the third mounting member 173 is blocked at the fourth opening, and the third mounting member 173 is threadedly connected to the second mounting member 172, and the position of the third mounting member 173 along the axial direction of the second piston 41 can be adjusted by rotating the third mounting member 173, which is convenient for operation. Of course, the third mounting member 173 can also be slidably provided on the second mounting member 172 along the axial direction of the second piston 41, and a third adjusting driving member is provided to drive the third mounting member 173 to slide, so as to adjust the position of the third mounting member 173 along the axial direction of the second piston 41.

[0076] Optionally, a sixth sealing member 1721 is provided between the second mounting member 172 and the housing 1 , thereby improving the sealing performance of the second chamber 12 and preventing leakage of the hydraulic medium in the second chamber 12 .

[0077] Optionally, a seventh sealing member 1732 is provided between the third mounting member 173 and the second mounting member 172 , thereby improving the sealing performance of the second chamber 12 and preventing leakage of the hydraulic medium in the second chamber 12 .

[0078] Illustratively, the first seal 31 , the second seal 214 , the third seal 411 , the fourth seal 511 , the fifth seal 1711 , the sixth seal 1721 and the seventh seal 1732 are all sealing rings, and the present embodiment does not limit the structure of the sealing rings.

[0079] Optionally, the pedal simulator further comprises a fifth elastic member 61, which is fixed to the cavity 132, and the adapter 174 can abut against the fifth elastic member 61 along the axial direction of the third piston 51. During the compression of the third elastic member 521, the adapter 174 will abut against the inner wall of the cavity 132 along the axial direction of the third piston 51. By providing the fifth elastic member 61, a buffering effect can be played on the adapter 174, thereby making the transition from the compression of the third elastic member 521 to the compression of the fourth elastic member 522 smooth, thereby improving the smoothness of the pedal feel.

[0080] Optionally, the pedal simulator further includes a sixth elastic member 62, which is fixed to the cavity three 131, and the third mounting member 173 is provided with a connecting portion 1731, which can abut against the sixth elastic member 62 along the axial direction of the third piston 51. When the fourth elastic member 522 is compressed until the connecting portion 1731 abuts against the sixth elastic member 62, as the fourth elastic member 522 continues to be compressed, the connecting portion 1731 will squeeze the sixth elastic member 62, so that the sixth elastic member 62 is elastically deformed until the third piston 51 abuts against the inner wall of the cavity four 132 along its axial direction. With such a configuration, on the one hand, the fourth elastic member 522 can buffer the connecting portion 1731, further improving the smoothness of the pedal feel, and on the other hand, the sixth elastic member 62 is provided to further increase the maximum force value of the pedal force that can be fed back by the pedal simulator, further improving the versatility of the pedal simulator.

[0081] In this embodiment, the connecting portion 1731 is fixedly connected to the third mounting member 173. Specifically, one end of the connecting portion 1731 is fixedly connected to the third mounting member 173, and the other end is located outside the sleeve after passing through the closed end of the sleeve. Further, an abutment block is provided at one end of the connecting portion 1731 abutting against the sixth elastic member 62, and the outer diameter of the abutment block is larger than the outer diameter of the connecting portion 1731, thereby increasing the contact area between the connecting portion 1731 and the sixth elastic member 62, which can improve the uniformity of the elastic deformation of the sixth elastic member 62, thereby improving the smoothness of the pedal feel.

[0082] In other embodiments, it can also be configured that: the connection portion 1731 is adjustably arranged on the third mounting member 173 along the axial position of the third piston 51. By adjusting the mounting position of the connection portion 1731, the compression degree of the fourth elastic member 522 and the sixth elastic member 62 can be adjusted, and then the reaction force provided by the fourth elastic member 522 and the sixth elastic member 62 can be adjusted, so that the pedal force that can be fed back by the pedal simulator has a larger force adjustment range and is more versatile.

[0083] In this embodiment, the first elastic structure includes a first elastic member 22 , and the second elastic structure includes a second elastic member 42 .

[0084] Exemplarily, the first elastic member 22 is a first compression spring, the second elastic member 42 is a second compression spring, the third elastic member 521 is a third compression spring, and the fourth elastic member 522 is a fourth compression spring. It should be noted that the elastic force of the first compression spring, the second compression spring, the third compression spring and the fourth compression spring can be set according to needs and is not limited here.

[0085] Exemplarily, the fifth elastic member 61 and the sixth elastic member 62 are both rubber pads. It should be noted that the elastic force that can be provided by the fifth elastic member 61 and the sixth elastic member 62 when elastically deformed can be set according to needs and is not limited here.

[0086] In other embodiments, the first elastic structure may also include multiple first elastic members 22, the elastic forces of the multiple first elastic members 22 may be the same, or the elastic forces of the multiple first elastic members 22 may be different. Exemplarily, the multiple first elastic members 22 are connected in sequence. Of course, the multiple first elastic members 22 may also adopt other connection forms in the prior art, which are not limited here.

[0087] In other embodiments, the second elastic structure may also include multiple second elastic members 42, the elastic forces of the multiple second elastic members 42 may be the same, or the elastic forces of the multiple second elastic members 42 may be different. For example, the multiple second elastic members 42 are connected in sequence. Of course, the multiple second elastic members 42 may also adopt other connection forms in the prior art, which are not limited here.

[0088] It should be noted that if Figure 2 Combination Fig. 9 As shown in , curve a is the corresponding relationship curve between the pedal force and the pedal stroke when the first mounting member 171 is in its initial mounting position. By moving the first mounting member 171 in the direction close to the first piston 21 along the axial direction of the first piston 21, the elastic force of the first elastic structure can be increased, thereby increasing the initial force value of the pedal force. At this time, the corresponding relationship curve between the pedal force and the pedal stroke is curve a1. By moving the first mounting member 171 in the direction away from the first piston 21 along the axial direction of the first piston 21, the elastic force of the first elastic structure can be reduced, thereby reducing the initial force value of the pedal force. At this time, the corresponding relationship curve between the pedal force and the pedal stroke is curve a2.

[0089] It should be noted that if Figure 2 Combination Fig.10 As shown, curve b is the corresponding relationship curve between the pedal force and the pedal stroke when the second mounting member 172 is in its initial mounting position. By moving the second mounting member 172 in the axial direction of the second piston 41 toward the second piston 41, the elastic force of the second elastic structure can be increased, thereby increasing the pedal force and making the pedal feel heavier. At this time, the corresponding relationship curve between the pedal force and the pedal stroke is curve b1. By moving the second mounting member 172 in the axial direction of the second piston 41 away from the second piston 41, the elastic force of the second elastic structure can be reduced, thereby reducing the pedal force and making the pedal feel lighter. At this time, the corresponding relationship curve between the pedal force and the pedal stroke is curve b2.

[0090] It should be noted that if Figure 2 Combination Fig.11As shown, curve c is the corresponding relationship curve between the pedal force and the pedal stroke when the third mounting member 173 is in its initial mounting position. By moving the third mounting member 173 in the axial direction of the second piston 41 toward the second piston 41, the elastic force of the sixth elastic member 62 can be increased, thereby increasing the pedal force and making the pedal feel heavier. At this time, the corresponding relationship curve between the pedal force and the pedal stroke is curve c1. By moving the third mounting member 173 in the axial direction of the second piston 41 away from the second piston 41, the elastic force of the sixth elastic member 62 can be reduced, thereby reducing the pedal force and making the pedal feel lighter. At this time, the corresponding relationship curve between the pedal force and the pedal stroke is curve c2.

[0091] Optionally, the pedal simulator further includes an input connector 7, one end of which is rotatably connected to the first piston 21, and the other end of which is used to connect to the brake pedal. In this way, the input connector 7 can apply force to the first piston 21 along the axial direction of the first piston 21, which is conducive to improving the smoothness of the sliding of the first piston 21, thereby improving the smoothness of the pedal feel.

[0092] Specifically, both ends of the input connector 7 are provided with ball heads 71, and the first piston 21 is provided with a mounting groove corresponding to one of the ball heads 71. The ball head 71 is rotatably installed in the mounting groove, so that the input connector 7 applies force to the first piston 21 along the axial direction of the first piston 21.

[0093] Optionally, the pedal simulator also includes a cover 8, an opening at one end of the cover 8 is sleeved on the outside of the input connector 7, and an opening at the other end of the cover 8 is connected to the shell 1. The cover 8 can be deformed as the input connector 7 moves, and dust can be prevented by the cover 8, thereby preventing the first piston 21 from bringing external dust and other impurities into the interior of the shell 1.

[0094] Exemplarily, the cover body 8 is a bellows structure.

[0095] Optionally, an eighth sealing member is provided between the cover body 8 and the input connector 7, and between the cover body 8 and the housing 1, so as to improve the sealing performance and further improve the dustproof effect.

[0096] This embodiment also provides a vehicle, including a brake pedal and the pedal simulator as described above, wherein the brake pedal is connected to the first piston 21. The vehicle of this embodiment, by applying the pedal simulator as described above, has the same functions and beneficial effects as the pedal simulator as described above, which will not be described in detail here.

[0097] Exemplarily, the working principle of the pedal simulator of this embodiment is:

[0098] like Figures 2 to 4As shown, when the driver steps on the brake pedal, the input connector 7 is pushed forward and a force is applied to the first piston 21, thereby pushing the first piston 21 to slide forward. Before the stroke of the first piston 21 is greater than the preset stroke S1, the first piston 21 compresses the volume of the second cavity 112 to form hydraulic pressure, so that the hydraulic medium in the second cavity 112 enters the first cavity 111 through the oil guide channel, and enters the first channel 14 from the first cavity 111, and then flows into the second cavity 12. At the same time, the hydraulic medium in the second cavity 112 enters the third cavity 131 through the second channel 15. The hydraulic medium entering the second cavity 12 through the first channel 14 pushes the second piston 41 to slide to compress the second elastic structure; the hydraulic medium entering the third cavity 131 through the second channel 15 pushes the third piston 51 to slide to compress the third elastic structure. When the stroke of the first piston 21 is greater than the preset stroke S1, the oil guide channel is closed, which is equivalent to disconnecting the first channel 14, thereby disconnecting the second chamber 12 from the first chamber 111. At this time, the first piston 21 continues to slide forward under the action of the brake pedal, and the hydraulic medium in the second chamber 112 can only flow into the third chamber 131 through the second channel 15. The hydraulic pressure of the pedal simulator is provided by the third elastic structure, the fifth elastic member 61 and the sixth elastic member 62. At the same time, Figure 5 As shown, in the process of the hydraulic medium entering the third chamber 131 through the second channel 15 pushing the third piston 51 to slide, the third piston 51 compresses the volume of the fourth chamber 132 to form hydraulic pressure, so that the hydraulic medium in the fourth chamber 132 enters the second chamber 12 through the third channel 16.

[0099] When the driver releases the brake pedal, the first piston 21 retreats following the input connector 7, and the pressure in the second chamber 112 decreases. At this time, the third piston 51, under the elastic force of the third elastic structure, causes the hydraulic medium in the third chamber 131 to return to the second chamber 112 through the second channel 15; at the same time, under the elastic force of the second elastic structure, the second piston 41 causes a part of the hydraulic medium in the second chamber 12 to return to the first chamber 111 through the first channel 14, and then returns to the second chamber 112 from the first chamber 111 through the oil guide channel, and causes another part of the hydraulic medium in the second chamber 12 to return to the fourth chamber 132 through the third channel 16 (as shown in FIG. 1 ). Figure 6 As shown), so that the hydraulic medium circulates in the housing 1.

[0100] It should be noted that since the pedal simulator simulates the relationship between brake pedal force and stroke, the vehicle braking also includes the relationship between brake pressure plate force and vehicle deceleration. This can be achieved through the software of the wire control product, but for the relationship between brake pedal force and stroke, the existing pedal simulator needs to be achieved by replacing mechanical hardware.

[0101] The pedal simulator of this embodiment can increase or decrease the initial force value of the pedal force to meet different needs by adjusting the internal structure, such as the installation position of the first mounting member 171. It can also adjust the internal structure, such as the installation position of the second mounting member 172 and the third mounting member 173, to make the pedal feel heavier or lighter to achieve different pedal feelings.

[0102] The pedal simulator of this embodiment can better simulate the pedal feel of a traditional vehicle, more realistically adhere to the driving feel of a traditional vehicle, and improve the driver's driving experience.

[0103] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A pedal simulator, characterized in that include: A housing (1), the housing (1) comprising a first chamber (11), a second chamber (12), a third chamber (13), a first channel (14), a second channel (15) and a third channel (16), all of which are sealed, wherein hydraulic medium is provided in the first chamber (11) and the third chamber (13); A first reaction force assembly (2) comprises a first piston (21) and a first elastic structure, wherein the first piston (21) is slidably disposed in the first chamber (11) along its axial direction, and two ends of the first elastic structure are respectively connected to the first piston (21) and the housing (1), and the first piston (21) can slide under the action of a brake pedal to apply force to the first elastic structure and the hydraulic medium in the first chamber (11); A sealing structure, wherein the sealing structure is configured to connect the first chamber (11) with the second chamber (12) through the first passage (14) when the sliding stroke of the first piston (21) under the action of the brake pedal is not greater than a preset stroke S1; the sealing structure is also configured to disconnect the first passage (14) when the sliding stroke of the first piston (21) under the action of the brake pedal is greater than the preset stroke S1; a second reaction force assembly (4), comprising a second piston (41) and a second elastic structure, wherein the second piston (41) is slidably disposed in the second chamber (12) along its axial direction, and two ends of the second elastic structure are respectively connected to the second piston (41) and the housing (1), and the second piston (41) is capable of sliding under the action of the hydraulic medium entering the second chamber (12) through the first channel (14) to apply force to the second elastic structure; The third reaction force assembly (5) comprises a third piston (51) and a third elastic structure. The third piston (51) is slidably arranged in the third chamber (13) along its axial direction. The third piston (51) separates the third chamber (13) into a chamber three (131) and a chamber four (132) which are not connected to each other. The chamber three (131) is connected to the first chamber (11) through the second channel (15), and the chamber four (132) is connected to the second chamber (12) through the third channel (16). The two ends of the third elastic structure are respectively connected to the third piston (51) and the housing (1). The third piston (51) can slide under the action of the hydraulic medium entering the chamber three (131) through the second channel (15) to apply force to the third elastic structure and the hydraulic medium in the chamber four (132).

2. The pedal simulator according to claim 1, characterized in that The sealing structure comprises a first sealing member (31) installed on the inner wall of the first chamber (11), the first sealing member (31) being sleeved on the outer side of the first piston (21), the first sealing member (31) being capable of dividing the first chamber (11) into a first chamber (111) and a second chamber (112), the first channel (14) being connected to the first chamber (111), and the second channel (15) being connected to the second chamber (112); The first piston (21) is provided with an oil guide channel, one end opening of the oil guide channel is located in the second cavity (112), and the other end opening of the oil guide channel is located on the outer peripheral surface of the first piston (21); When the sliding stroke of the first piston (21) under the action of the brake pedal is not greater than the preset stroke S1, the first sealing component (31) can make the other end opening of the oil guide channel communicate with the cavity one (111); when the sliding stroke of the first piston (21) under the action of the brake pedal is greater than the preset stroke S1, the first sealing component (31) can make the other end opening of the oil guide channel not communicate with the cavity one (111).

3. The pedal simulator according to claim 1, characterized in that The housing (1) comprises a mounting structure, the mounting structure being adjustably arranged on the housing (1) along the axial position of the third piston (51), and the two ends of the third elastic structure are respectively connected to the mounting structure and the third piston (51); and / or, The housing (1) comprises a first mounting member (171), the first mounting member (171) being adjustably arranged on the housing (1) along the axial position of the first piston (21), and the two ends of the first elastic structure are respectively connected to the first mounting member (171) and the first piston (21).

4. The pedal simulator according to claim 3, characterized in that The third elastic structure comprises a third elastic member (521) and a fourth elastic member (522), one end of the third elastic member (521) is connected to the mounting structure, and the other end is connected to one end of the fourth elastic member (522), and the other end of the fourth elastic member (522) is connected to the third piston (51); The elastic force of the third elastic member (521) is smaller than the elastic force of the fourth elastic member (522).

5. The pedal simulator according to claim 4, characterized in that The mounting structure comprises: a second mounting member (172), the second mounting member (172) being adjustably arranged on the housing (1) along the axial position of the third piston (51); a third mounting member (173), the third mounting member (173) being adjustably arranged on the second mounting member (172) along the axial position of the third piston (51); A transition piece (174), wherein the transition piece (174) is slidably connected to the third mounting piece (173) along the axial direction of the third piston (51), one end of the third elastic piece (521) is connected to the third mounting piece (173), and the other end is connected to the transition piece (174), and one end of the fourth elastic piece (522) is connected to the transition piece (174).

6. The pedal simulator according to claim 5, characterized in that The pedal simulator further comprises a fifth elastic member (61), the fifth elastic member (61) being fixedly arranged in the cavity 4 (132), and the adapter (174) being capable of abutting against the fifth elastic member (61) along the axial direction of the third piston (51); and / or, The pedal simulator also includes a sixth elastic member (62), the sixth elastic member (62) is fixedly arranged in the cavity three (131), and the third mounting member (173) is provided with a connecting portion (1731), and the connecting portion (1731) can abut against the sixth elastic member (62) along the axial direction of the third piston (51).

7. The pedal simulator according to claim 6, characterized in that The connecting portion (1731) is adjustably arranged on the third mounting member (173) along the axial position of the third piston (51).

8. The pedal simulator according to any one of claims 1 to 7, characterized in that: The pedal simulator further comprises an input connecting member (7), one end of which is rotationally connected to the first piston (21), and the other end of which is used to be connected to the brake pedal.

9. The pedal simulator according to claim 8, characterized in that The pedal simulator further comprises a cover (8), wherein an opening at one end of the cover (8) is sleeved on the outside of the input connector (7), and an opening at the other end of the cover (8) is connected to the housing (1); the cover (8) can be deformed as the input connector (7) moves.

10. A vehicle, characterized in that Comprising a pedal simulator as described in any one of claims 1-9.

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