Pedal simulator and vehicle

Abstract

The application discloses a pedal simulator and a vehicle, and belongs to the technical field of pedal simulators.The pedal simulator and the vehicle of the application cancel an external oil pot, so that hydraulic medium is sealed in a first cavity, a second cavity and a third cavity of a shell, and the hydraulic medium is circulated between the first cavity, the second cavity and the third cavity through a first channel, a second channel and a third channel.Because the first cavity, the second cavity and the third cavity are all separated from external air, hydraulic pressure can be generated as soon as the first piston starts to move, and then the third piston can be smoothly pushed to move, so that sudden change of pedal force does not occur, a more smooth pedal feeling can be provided, the performance is more stable, and the overall structure is more compact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pedal simulator, and particularly relates to a pedal simulator and a vehicle. BACKGROUND

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

[0003] With the popularization of new energy vehicles, new energy vehicles more and more adopt electronically controlled boosters, especially the brake-by-wire appears, the decoupling between the brake pedal and the brake hydraulic pressure is realized, and a special pedal feel simulator is needed to simulate the relationship between the pedal stroke and the pedal force to provide the pedal feel.

[0004] At present, the pedal simulator used in cooperation with the brake-by-wire system is still of a structure with an external oil pot, which is large in size and affects the overall structure arrangement and optimization. The pedal simulator has no hydraulic pressure generated inside the cavity before the master cylinder piston overcomes the idle stroke S, and starts to generate hydraulic pressure after overcoming the idle stroke S to push the simulation cavity piston to move. As shown in the figure, when the simulation cavity piston starts to move, because the simulation cavity piston has an installation initial force and a friction force, when overcoming the two force values, there will be a force value fluctuation on the input push rod, and the driver will also have a feeling of sudden change of pedal force on the foot when stepping on the brake pedal and overcoming the idle stroke S, and the driving experience is poor. Figure 1 SUMMARY

[0005] The present application aims to provide a pedal simulator and a vehicle, which can provide a smoother pedal feel and improve the driving experience.

[0006] To achieve the above-mentioned purpose, the following technical solutions are provided:

[0007] A pedal simulator, comprising:

[0008] A housing, the housing comprises a first cavity, a second cavity, a third cavity, a first channel, a second channel and a third channel, which are all sealed, and the first cavity and the third cavity are both provided with a hydraulic medium;

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

[0010] ​A sealing structure is configured to make the first cavity and the second cavity communicate through the first channel when the stroke of the first piston under the action of the brake pedal is not greater than a preset stroke S1, and the sealing structure is also configured to make the first channel disconnected when the stroke of the first piston under the action of the brake pedal is greater than the preset stroke S1.

[0011] A second counterforce assembly includes a second piston and a second elastic structure, the second piston is slidably arranged in the second cavity along the axial direction, and two ends of the second elastic structure are connected with the second piston and the shell respectively, 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] A third counterforce assembly includes a third piston and a third elastic structure, the third piston is slidably arranged in the third cavity along the axial direction, and the third piston separates the third cavity into a cavity three and a cavity four, the cavity three and the first cavity communicate through the second channel, and the cavity four and the second cavity communicate through the third channel, and two ends of the third elastic structure are connected with the third piston and the shell respectively, and 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 scheme of the above-mentioned pedal simulator, the sealing structure includes a first sealing member mounted 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 a cavity one and a cavity two, the first channel communicates with the cavity one, and the second channel communicates with the cavity two.

[0014] The first piston is provided with an oil guide channel, one end of the oil guide channel is opened in the cavity two, and the other end of the oil guide channel is opened on the outer peripheral surface of the first piston.

[0015] When the stroke of the first piston under the action of the brake pedal is not greater than a preset stroke S1, the first sealing member can make the other end opening of the oil guide channel communicate with the cavity one, and when the stroke of the first piston under the action of the brake pedal is greater than the preset stroke S1, the first sealing member can make the other end opening of the oil guide channel not communicate with the cavity one.

[0016] As a preferred technical scheme of the pedal simulator, the shell comprises a mounting structure, the mounting structure is arranged in the shell in an adjustable manner along the axial position of the third piston, and two ends of the third elastic structure are connected with the mounting structure and the third piston respectively; and / or,

[0017] The shell comprises a first mounting member, the first mounting member is arranged in the shell in an adjustable manner along the axial position of the first piston, and two ends of the first elastic structure are connected with the first mounting member and the first piston respectively.

[0018] As a preferred technical scheme of the pedal simulator, the third elastic structure comprises a third elastic member and a fourth elastic member, one end of the third elastic member is connected with the mounting structure, the other end of the third elastic member is connected with one end of the fourth elastic member, and the other end of the fourth elastic member is connected with 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 scheme of the pedal simulator, the mounting structure comprises:

[0021] A second mounting member, the second mounting member is arranged in the shell in an adjustable manner along the axial position of the third piston;

[0022] A third mounting member, the third mounting member is arranged in the second mounting member in an adjustable manner along the axial position of the third piston;

[0023] An adapter, the adapter is in sliding connection with the third mounting member along the axial direction of the third piston, one end of the third elastic member is connected with the third mounting member, the other end of the third elastic member is connected with the adapter, and one end of the fourth elastic member is connected with the adapter.

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

[0025] The pedal simulator further comprises a sixth elastic member, the sixth elastic member is fixedly arranged in the third cavity, the third mounting member is provided with a connecting portion, and the connecting portion is capable of abutting against the sixth elastic member along the axial direction of the third piston.

[0026] As a preferred technical scheme of the pedal simulator, the connecting portion is arranged in the third mounting member in an adjustable manner along the axial position of the third piston.

[0027] As a preferred technical scheme of the pedal simulator, the pedal simulator further comprises an input connecting piece, one end of the input connecting piece is rotationally connected with the first piston, and the other end is used for being connected with the brake pedal.

[0028] As a preferred technical scheme of the pedal simulator, the pedal simulator further comprises a cover body, an opening at one end of the cover body is sleeved outside the input connecting piece, an opening at the other end of the cover body is connected with the shell body, and the cover body can be deformed along with movement of the input connecting piece.

[0029] In order to achieve the above-mentioned purpose, the application further provides a vehicle comprising the pedal simulator according to any one of the above.

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

[0031] Compared with the prior art, the pedal simulator and the vehicle of the application cancel the external oil pot, seal the hydraulic medium in the first cavity, the second cavity and the third cavity of the shell body, and make the hydraulic medium circulate between the first cavity, the second cavity and the third cavity through the first channel, the second channel and the third channel. Since the first cavity, the second cavity and the third cavity are all separated from the external air, the hydraulic pressure can be generated as soon as the first piston starts to move, and then the third piston can be smoothly pushed to move, so that the pedal force does not suddenly change. Not only can a more smooth pedal feeling be provided, but also the performance is more stable, and the overall structure is more compact. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A curve diagram of pedal force and brake pedal stroke feedback by the pedal simulator in the prior art;

[0033] Figure 2 A structure schematic diagram of the pedal simulator in the embodiment of the application;

[0034] Figure 3 A Figure 2 An enlarged view of A in FIG. 4;

[0035] Figure 4 A Figure 3 An enlarged view of B in FIG. 5;

[0036] Figure 5 A first partial structure schematic diagram of the pedal simulator in the embodiment of the application;

[0037] Figure 6 A second partial structure schematic diagram of the pedal simulator in the embodiment of the application;

[0038] Figure 7 An exploded view of the pedal simulator in the embodiment of the application;

[0039] Figure 8 A first graph of pedal force versus brake pedal travel for pedal simulator feedback in an embodiment of the application;

[0040] Figure 9 A second graph of pedal force versus brake pedal travel for pedal simulator feedback in an embodiment of the application;

[0041] Figure 10 A third graph of pedal force versus brake pedal travel for pedal simulator feedback in an embodiment of the application;

[0042] Figure 11 A fourth graph of pedal force versus brake pedal travel for pedal simulator feedback in an embodiment of the application.

[0043] Reference Signs:

[0044] 1, housing; 11, first cavity; 111, cavity one; 112, cavity two; 113, boss; 12, second cavity; 13, third cavity; 131, cavity three; 132, cavity four; 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 portion; 1732, seventh sealing member; 174, adapter; 2, first counterforce assembly; 21, first piston; 211, limiting portion; 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 counterforce assembly; 41, second piston; 411, third sealing member; 42, second elastic member; 5, third counterforce 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 connecting member; 71, ball head; 8, cover body. DETAILED DESCRIPTION

[0045] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but merely represents selected embodiments of the application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the application without creative labor fall within the scope of protection of the application.

[0047] It should be noted that similar reference numbers and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0048] In the description of the application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is usually placed, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0049] In the description of the application, it should also be noted that, unless otherwise specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0050] In the present application, unless otherwise specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "over", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0051] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

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

[0053] The first reaction force component 2 includes a first piston 21 and a first elastic structure. The first piston 21 is slidably disposed in the first cavity 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 cavity 11.

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

[0055] The second reaction force component 4 includes a second piston 41 and a second elastic structure. The second piston 41 is slidably disposed in the second cavity 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 that enters the second cavity 12 through the first channel 14 to apply force to the second elastic structure.

[0056] The third reaction force component 5 includes a third piston 51 and a third elastic structure. The third piston 51 is slidably disposed in the third cavity 13 along its axial direction. The third piston 51 divides the third cavity 13 into two non-communicating cavities, a third cavity 131 and a fourth cavity 132. The third cavity 131 is connected to the first cavity 11 through a second channel 15, and the fourth cavity 132 is connected to the second cavity 12 through a 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 third cavity 131 through the second channel 15 to apply force to the hydraulic medium in the third elastic structure and the fourth cavity 132.

[0057] Compared with the prior art, the pedal simulator of the embodiment cancels the external oil pot, seals the hydraulic medium in the first cavity 11, the second cavity 12 and the third cavity 13 of the shell 1, and forms circulation of the hydraulic medium between the first cavity 11, the second cavity 12 and the third cavity 13 through the first channel 14, the second channel 15 and the third channel 16. Since the first cavity 11, the second cavity 12 and the third cavity 13 are all separated from the external air, the hydraulic pressure can be generated as soon as the first piston 21 starts to move, and then the third piston 51 can be smoothly pushed to move, as shown in Figure 8 for example, a sudden change in pedal force does not occur, a more smooth pedal feeling can be provided, the performance is more stable, and the overall structure is more compact.

[0058] In the embodiment, reference is continued to Figures 2 to 4 The sealing structure includes a first sealing member 31 mounted to the inner wall of the first cavity 11. The first sealing member 31 is sleeved on the outer side of the first piston 21. The first sealing member 31 can separate the first cavity 11 into cavity one 111 and cavity two 112. The first channel 14 is in communication with the cavity one 111, and the second channel 15 is in communication with the cavity two 112. The first piston 21 is provided with an oil guide channel. One end of the oil guide channel is open in the cavity two 112, and the other end of the oil guide channel is open 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 make the other end of the oil guide channel open in communication with the cavity one 111, so that the hydraulic medium in the cavity two 112 can enter the cavity one 111 through the oil guide channel and flow into the second cavity 12 through the first channel 14. 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 member 31 can isolate the other end of the oil guide channel from the cavity one 111. In other words, the first sealing member 31 makes the other end of the oil guide channel not in communication with the cavity one 111, so that the hydraulic medium in the cavity two 112 cannot enter the second cavity 12 through the first channel 14.

[0059] Specifically, the inner wall of the first cavity 11 body is provided with an annular boss 113. The first sealing member 31 is mounted to 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 on the outer peripheral surface of the first piston 21 is referred to as an oil guide opening. The oil guide opening includes oppositely arranged first and second hole walls 2131 and 2132. In the direction in which the brake pedal exerts force on 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 seal 31 comprises a sealing portion 311 for abutting against the outer circumferential surface of the first piston 21. One end of the first piston 21 is provided with a limiting portion 211. 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, and the maximum distance between the first hole wall 2131 and the sealing portion 311 is a preset stroke S1. That is, when the brake pedal is started 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 cavity two 112 can enter the cavity one 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 abuts against the outer circumferential surface of the first piston 21 to close the oil guide opening, so that the hydraulic medium in the cavity two 112 cannot enter the cavity two 112 through the oil guide channel, and no hydraulic medium enters the second cavity 12 through the first channel 14, which is equivalent to disconnecting the first channel 14.

[0062] Specifically, the oil guide channel comprises an oil guide groove 212 and an oil guide hole 213. The oil guide groove 212 is arranged on the end face of the first piston 21 located in the cavity two 112, and the oil guide hole 213 is arranged on the outer circumferential surface of the first piston 21. The oil guide hole 213 communicates with the oil guide groove 212. Optionally, the oil guide hole 213 can be provided with one, two, three, four or even more, thereby improving the oil guide amount and the oil guide efficiency.

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

[0064] Optionally, the shell 1 is provided with a first opening in communication with the first cavity 11, one end of the first piston 21 is located in the first cavity 11, the other end of the first piston 21 is located outside the shell 1 through the first opening, the outer side of the other end of the first piston 21 is sleeved with a second sealing piece 214, and the second sealing piece 214 is fixed to the inner wall of the first opening. Therefore, the first piston 21 clamps the second sealing piece 214 with the inner wall of the first opening, so as to seal the first opening and improve the sealing effect of the first cavity 11.

[0065] Optionally, the outer side of the second piston 41 is sleeved with a third sealing piece 411, thereby improving the sealing performance of the cavity three 131 and the cavity four 132, avoiding the flow of hydraulic medium between the cavity three 131 and the cavity four 132, and facilitating the smoothness of the pedal feeling.

[0066] Optionally, the outer side of the third piston 51 is sleeved with a fourth sealing piece 511, thereby avoiding leakage of the hydraulic medium in the second cavity 12 and also facilitating the smoothness of the pedal feeling.

[0067] Optionally, in combination with the Figure 2 and Figure 7 As shown, the shell 1 includes a first mounting piece 171, the first mounting piece 171 is adjustably arranged in the shell 1 along the axial position of the first piston 21, both ends of the first elastic structure are connected with the first mounting piece 171 and the first piston 21 respectively, and the pre-tightening force of the first elastic structure can be adjusted by adjusting the mounting position of the first mounting piece 171, thereby adjusting the initial force value of the pedal force feedback to the brake pressure plate by the pedal simulator.

[0068] Exemplarily, the shell 1 is provided with a second opening in communication with the first cavity 11, the first mounting piece 171 is blocked in the second opening, and the first mounting piece 171 is threadedly connected with the shell 1. By rotating the first mounting piece 171, the axial position of the first mounting piece 171 along the first piston 21 can be adjusted, and the operation is convenient. Of course, the first mounting piece 171 can also be slidably arranged in the shell 1 along the axial direction of the first piston 21, and a first adjusting driving piece is arranged to drive the first mounting piece 171 to slide, thereby adjusting the axial position of the first mounting piece 171 along the first piston 21.

[0069] Optionally, the fifth sealing piece 1711 is arranged between the first mounting piece 171 and the shell 1, thereby improving the sealing performance of the first cavity 11 and avoiding leakage of the hydraulic medium in the first cavity 11.

[0070] Optionally, as shown in Figure 2As shown, the housing 1 comprises a mounting structure which is arranged in the housing 1 in an adjustable manner along the axial position of the third piston 51, and the two ends of the third elastic structure are connected with the mounting structure and the third piston 51 respectively, so that the pre-tightening force of the third elastic structure can be adjusted by adjusting the mounting position of the mounting structure, thereby realizing different pedal feelings.

[0071] Optionally, 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 with the mounting structure, the other end is connected with one end of the fourth elastic member 522, and the other end of the fourth elastic member 522 is connected with the third piston 51; the elastic force of the third elastic member 521 is smaller than that of the fourth elastic member 522, so that when the third piston 51 is pushed to move by the pressure medium entering the cavity three 131 through the second channel 15, a smaller counterforce can be provided by the third elastic member 521 first, which facilitates the increase of the brake pedal stroke, and after the third elastic member 521 is compressed, the fourth elastic member 522 is compressed to provide a larger counterforce, at this time, the increase speed of the brake pedal stroke slows down to provide a comfortable driving experience.

[0072] Optionally, the mounting structure comprises a second mounting member 172, a third mounting member 173 and an adapter member 174, the second mounting member 172 is arranged in the housing 1 in an adjustable manner along the axial position of the third piston 51; the third mounting member 173 is arranged in the second mounting member 172 in an adjustable manner along the axial position of the third piston 51; the adapter member 174 is in sliding connection with the third mounting member 173 along the axial direction of the third piston 51, one end of the third elastic member 521 is connected with the third mounting member 173, and the other end is connected with the adapter member 174, and one end of the fourth elastic member 522 is connected with the adapter member 174. In this way, the pre-tightening forces of the third elastic member 521 and the fourth elastic member 522 can be adjusted, so as to further adjust the pedal feeling and meet the needs of different users, and the universality is stronger. At the same time, the adapter member 174 supports the third elastic member 521, which is conducive to making the counterforce provided by the third elastic member 521 more smooth.

[0073] Specifically, the adapter member 174 is a sleeve with one open end and one closed end, the sleeve is arranged outside the third mounting member 173 and in sliding connection with 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 table, and the fourth elastic member 522 is arranged outside the sleeve, one end of the fourth elastic member 522 is connected with the mounting table, so that the third elastic member 521 and the fourth elastic member 522 can be supported and limited by the sleeve, thereby improving the mounting stability of the third elastic member 521 and the fourth elastic member 522, and making the counterforce provided by the third elastic member 521 and the fourth elastic member 522 more smooth.

[0074] Optionally, the shell 1 is provided with a third opening in communication with the second cavity 12, the second mounting member 172 is blocked in the third opening, and the second mounting member 172 is threadedly connected with the shell 1. By rotating the second mounting member 172, the position of the second mounting member 172 along the axial direction of the second piston 41 can be adjusted, which is convenient to operate. Of course, the second mounting member 172 can also be slidably arranged in the shell 1 along the axial direction of the second piston 41, and a second adjusting driving member is arranged to drive the second mounting member 172 to slide 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 in communication with the second cavity 12, the third mounting member 173 is blocked in the fourth opening, and the third mounting member 173 is threadedly connected with the second mounting member 172. By rotating the third mounting member 173, the position of the third mounting member 173 along the axial direction of the second piston 41 can be adjusted, which is convenient to operate. Of course, the third mounting member 173 can also be slidably arranged in the second mounting member 172 along the axial direction of the second piston 41, and a third adjusting driving member is arranged to drive the third mounting member 173 to slide to adjust the position of the third mounting member 173 along the axial direction of the second piston 41.

[0076] Optionally, the sixth sealing member 1721 is arranged between the second mounting member 172 and the shell 1, thereby improving the sealing performance of the second cavity 12 and preventing the hydraulic medium in the second cavity 12 from leaking.

[0077] Optionally, the seventh sealing member 1732 is arranged between the third mounting member 173 and the second mounting member 172, thereby improving the sealing performance of the second cavity 12 and preventing the hydraulic medium in the second cavity 12 from leaking.

[0078] Optionally, the first sealing member 31, the second sealing member 214, the third sealing member 411, the fourth sealing member 511, the fifth sealing member 1711, the sixth sealing member 1721 and the seventh sealing member 1732 are all sealing rings, and the structure of the sealing ring is not limited in the embodiment.

[0079] Optionally, the pedal simulator further comprises a fifth elastic member 61, the fifth elastic member 61 is fixedly arranged in the cavity four 132, and the adapter 174 can abut against the fifth elastic member 61 along the axial direction of the third piston 51. In the process of compression of the third elastic member 521, the adapter 174 abuts against the inner wall of the cavity four 132 along the axial direction of the third piston 51. By arranging the fifth elastic member 61, the adapter 174 can be buffered, and the transition of the compression of the third elastic member 521 to the compression of the fourth elastic member 522 is smooth, and the smoothness of the pedal feeling is improved.

[0080] Optionally, the pedal simulator further comprises a sixth elastic member 62, the sixth elastic member 62 is fixedly arranged in the cavity three 131, the third mounting member 173 is provided with a connecting portion 1731, the connecting portion 1731 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 to abut against the connecting portion 1731 and the sixth elastic member 62, as the fourth elastic member 522 continues to be compressed, the connecting portion 1731 will extrude the sixth elastic member 62 to make the sixth elastic member 62 elastically deform until the third piston 51 abuts against the inner wall of the cavity four 132 along the axial direction. In this way, on the one hand, the fourth elastic member 522 can play a buffering role on the connecting portion 1731, further improving the smoothness of the pedal feeling, on the other hand, by arranging the sixth elastic member 62, the maximum force value of the pedal force that the pedal simulator can feedback is further increased, further improving the versatility of the pedal simulator.

[0081] In the embodiment, the connecting portion 1731 is fixedly connected with the third mounting member 173. Specifically, one end of the connecting portion 1731 is fixedly connected with the third mounting member 173, and the other end is located outside the sleeve after penetrating through the closed end of the sleeve. Further, the end of the connecting portion 1731 abutting against the sixth elastic member 62 is provided with an abutting block, the outer diameter of the abutting block is greater than the outer diameter of the connecting portion 1731, thereby increasing the contact area of 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 feeling.

[0082] In other embodiments, the connecting portion 1731 can also be adjustably arranged in the third mounting member 173 along the axial direction of the third piston 51. By adjusting the mounting position of the connecting portion 1731, the compression degree of the fourth elastic member 522 and the sixth elastic member 62 can be adjusted, thereby adjusting the counterforce provided by the fourth elastic member 522 and the sixth elastic member 62, so that the pedal simulator can feedback a larger range of pedal force values, and has higher versatility.

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

[0084] For example, 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 requirements, which is not limited herein.

[0085] For example, the fifth elastic member 61 and the sixth elastic member 62 are both rubber pads. It should be noted that the elastic force that the fifth elastic member 61 and the sixth elastic member 62 can provide when elastically deformed can be set according to requirements, which is not limited herein.

[0086] In other embodiments, the first elastic structure can also include a plurality of first elastic members 22, the plurality of first elastic members 22 can have the same elastic force, or the plurality of first elastic members 22 can have different elastic forces. Exemplarily, the plurality of first elastic members 22 are connected in sequence, and of course, the plurality of first elastic members 22 can also adopt other connection forms in the prior art, which are not limited herein.

[0087] In other embodiments, the second elastic structure can also include a plurality of second elastic members 42, the plurality of second elastic members 42 can have the same elastic force, or the plurality of second elastic members 42 can have different elastic forces. Exemplarily, the plurality of second elastic members 42 are connected in sequence, and of course, the plurality of second elastic members 42 can also adopt other connection forms in the prior art, which are not limited herein.

[0088] It should be noted that, as shown in Figure 2 In combination with Figure 9 As shown in FIG. 6, curve a is a corresponding relationship curve of pedal force and pedal stroke when the first mounting member 171 is in its initial installation position. Moving the first mounting member 171 along the axial direction of the first piston 21 towards the first piston 21 can increase the elastic force of the first elastic structure, and thus increase the initial force value of the pedal force. At this time, the corresponding relationship curve of the pedal force and the pedal stroke is curve a1. Moving the first mounting member 171 along the axial direction of the first piston 21 away from the first piston 21 can decrease the elastic force of the first elastic structure, and thus decrease the initial force value of the pedal force. At this time, the corresponding relationship curve of the pedal force and the pedal stroke is curve a2.

[0089] It should be noted that, as shown in Figure 2 In combination with Figure 10 As shown in FIG. 7, curve b is a corresponding relationship curve of pedal force and pedal stroke when the second mounting member 172 is in its initial installation position. Moving the second mounting member 172 along the axial direction of the second piston 41 towards the second piston 41 can increase the elastic force of the second elastic structure, and thus increase the pedal force and make the pedal feel heavy. At this time, the corresponding relationship curve of the pedal force and the pedal stroke is curve b1. Moving the second mounting member 172 along the axial direction of the second piston 41 away from the second piston 41 can decrease the elastic force of the second elastic structure, and thus decrease the pedal force and make the pedal feel light. At this time, the corresponding relationship curve of the pedal force and the pedal stroke is curve b2.

[0090] It should be noted that, as shown in Figure 2 In combination with Figure 11As shown, curve c represents the relationship between pedal force and pedal travel when the third mounting member 173 is in its initial mounting position. Moving the third mounting member 173 along the axial direction of the second piston 41 towards the second piston 41 increases the elastic force of the sixth elastic member 62, thereby increasing the pedal force and making the pedal feel heavier. In this case, the relationship between pedal force and pedal travel is curve c1. Moving the third mounting member 173 along the axial direction of the second piston 41 away from the second piston 41 decreases the elastic force of the sixth elastic member 62, thereby decreasing the pedal force and making the pedal feel lighter. In this case, the relationship between pedal force and pedal travel is curve c2.

[0091] Optionally, the pedal simulator also includes an input connector 7, one end of which is rotatably connected to the first piston 21, and the other end is used to connect to the brake pedal. This configuration allows the input connector 7 to apply force to the first piston 21 along its axial direction, which helps to improve 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, thereby causing the input connector 7 to apply 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, with an opening at one end of the cover 8 fitted onto the outside of the input connector 7, and an opening at the other end of the cover 8 connected to the housing 1. The cover 8 can deform as the input connector 7 moves, thereby preventing dust from entering the housing 1 by the cover 8 and avoiding the first piston 21 bringing external dust and other impurities into the housing 1.

[0094] For example, the cover 8 is a corrugated pipe structure.

[0095] Optionally, an eighth sealing element is provided between the cover 8 and the input connector 7, and between the cover 8 and the housing 1, to improve the sealing performance and thus improve the dustproof effect.

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

[0097] For example, the working principle of the pedal simulator in this embodiment is as follows:

[0098] like Figures 2 to 4As shown, when the driver depresses the brake pedal, the input connector 7 is pushed forward and forces the first piston 21, thereby pushing the first piston 21 to slide forward. Before the stroke of the first piston 21 exceeds the preset stroke S1, the first piston 21 compresses the volume of the second cavity 112, forming hydraulic pressure. This allows the hydraulic medium in the second cavity 112 to enter the first cavity 111 through the oil guide channel, and then enter the first channel 14 from the first cavity 111, and then flow 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, thereby compressing the second elastic structure. The hydraulic medium entering the third cavity 131 through the second channel 15 pushes the third piston 51 to slide, thereby compressing the third elastic structure. When the stroke of the first piston 21 exceeds 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 element 61, and the sixth elastic element 62; at the same time, as Figure 5 As shown, the hydraulic medium entering the cavity 131 through the second channel 15 pushes the third piston 51 to slide. The third piston 51 compresses the volume of the cavity 132, forming hydraulic pressure, which causes the hydraulic medium in the cavity 132 to enter the second cavity 12 through the third channel 16.

[0099] When the driver releases the brake pedal, the first piston 21 retracts along with the input connector 7, reducing the pressure in cavity two 112. At this time, under the elastic force of the third elastic structure, the third piston 51 causes the hydraulic medium in cavity three 131 to return to cavity two 112 through the second channel 15; simultaneously, under the elastic force of the second elastic structure, the second piston 41 causes a portion of the hydraulic medium in cavity two 12 to return to cavity one 111 through the first channel 14, and then from cavity one 111 back to cavity two 112 through the oil guide channel, while another portion of the hydraulic medium in cavity two 12 returns to cavity four 132 through the third channel 16 (e.g., Figure 6 (as shown), so that the hydraulic medium circulates within the housing 1.

[0100] It should be noted that since the pedal simulator simulates the relationship between brake pedal force and travel, the whole vehicle braking also includes the relationship between brake pad force and vehicle deceleration. This can be achieved through the software of the drive-by-wire product. However, for the relationship between brake pedal force and travel, the existing pedal simulator needs to be implemented by changing the mechanical hardware.

[0101] The pedal simulator of the embodiment can increase or decrease the initial force value of the pedal force by adjusting the internal structure, such as the mounting position of the first mounting member 171, to meet different requirements. The pedal feeling can be made heavier or lighter by adjusting the internal structure, such as the mounting position of the second mounting member 172 and the third mounting member 173, to achieve different pedal feelings.

[0102] The pedal simulator of the embodiment can better simulate the pedal feeling of a traditional vehicle, more closely simulate the driving feeling of a traditional vehicle, and improve the driving experience of a driver.

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

Claims

1. A pedal simulator, characterized in that, include: The housing (1) includes a first cavity (11), a second cavity (12), a third cavity (13), a first channel (14), a second channel (15), and a third channel (16), all of which are sealed. Hydraulic medium is provided in both the first cavity (11) and the third cavity (13). The first reaction force component (2) includes a first piston (21) and a first elastic structure. The first piston (21) is slidably disposed in the first cavity (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 cavity (11). A sealing structure is configured such that when the first piston (21) slides for a distance not greater than a preset distance S1 under the action of the brake pedal, the first cavity (11) and the second cavity (12) are connected through the first channel (14); the sealing structure is also configured such that when the first piston (21) slides for a distance greater than the preset distance S1 under the action of the brake pedal, the first channel (14) is disconnected. The second reaction component (4) includes a second piston (41) and a second elastic structure. The second piston (41) is slidably disposed in the second cavity (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 that enters the second cavity (12) through the first channel (14) to apply force to the second elastic structure. The third reaction component (5) includes a third piston (51) and a third elastic structure. The third piston (51) is slidably disposed in the third cavity (13) along its axial direction. The third piston (51) divides the third cavity (13) into two non-communicating cavities, a third cavity (131) and a fourth cavity (132). The third cavity (131) is connected to the first cavity (11) through the second channel (15), and the fourth cavity (132) is connected to the second cavity (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 third cavity (131) through the second channel (15) to apply force to the hydraulic medium in the third elastic structure and the fourth cavity (132).

2. The pedal simulator according to claim 1, characterized in that, The sealing structure includes a first sealing element (31) installed on the inner wall of the first cavity (11), the first sealing element (31) being sleeved on the outside of the first piston (21), the first sealing element (31) being able to divide the first cavity (11) into cavity one (111) and cavity two (112), the first channel (14) communicating with cavity one (111), and the second channel (15) communicating with cavity two (112); The first piston (21) is provided with an oil guide channel. One end of the oil guide channel is located inside the cavity two (112), and the other end of the oil guide channel is located on the outer circumferential surface of the first piston (21). When the first piston (21) slides for a distance not greater than the preset distance S1 under the action of the brake pedal, the first seal (31) can make the other end of the oil guide channel open to communicate with the cavity one (111); when the first piston (21) slides for a distance greater than the preset distance S1 under the action of the brake pedal, the first seal (31) can make the other end of the oil guide channel open to not communicate with the cavity one (111).

3. The pedal simulator according to claim 1, characterized in that, The housing (1) includes a mounting structure, which is adjustablely disposed on the housing (1) along the axial position of the third piston (51). 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) includes a first mounting member (171), which is adjustablely disposed 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 includes a third elastic element (521) and a fourth elastic element (522). One end of the third elastic element (521) is connected to the mounting structure, and the other end is connected to one end of the fourth elastic element (522). The other end of the fourth elastic element (522) is connected to the third piston (51). The elastic force of the third elastic element (521) is less than that of the fourth elastic element (522).

5. The pedal simulator according to claim 4, characterized in that, The mounting structure includes: The second mounting member (172) is adjustablely disposed on the housing (1) along the axial position of the third piston (51); The third mounting member (173) is adjustablely disposed 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). One end of the fourth elastic member (522) is connected to the adapter (174).

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

7. The pedal simulator according to claim 6, characterized in that, The connecting part (1731) is adjustablely disposed 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 1-7, characterized in that, The pedal simulator also includes an input connector (7), one end of which is rotatably connected to the first piston (21), and the other end is used to connect to the brake pedal.

9. The pedal simulator according to claim 8, characterized in that, The pedal simulator also includes a cover (8), with an opening at one end of the cover (8) fitted onto the outside of the input connector (7), and an opening at the other end of the cover (8) connected to the housing (1). The cover (8) can deform as the input connector (7) moves.

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

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