Pedal simulator, brake-by-wire system and vehicle

Abstract

The utility model discloses a pedal simulator, a brake-by-wire system and a vehicle. The pedal simulator comprises a seat body; the moving rod is movably arranged on the seat body in a penetrating mode, the moving rod is provided with a matching part used for being matched with a pedal, and the moving rod is provided with a limiting part located on the side, close to the matching part, of the seat body; the disc spring sets are arranged on the moving rod in a sleeving mode and are arranged in a stacked mode, the disc spring sets located at the two ends in the stacking direction abut against the base body and the limiting part respectively, and at least two disc spring sets are different in structure. According to the technical scheme, the multiple disc spring sets are limited through the moving rod and the seat body, the structures of the at least two disc spring sets are different, a pedal curve can be divided into multiple sets, accurate simulation is achieved, the pedal feeling can be greatly improved, damping force of the disc spring sets is utilized, the damping feeling is better, cost is lower, and the structure is simpler.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pedal simulator, specifically, relates to a pedal simulator, line control brake system and vehicle. BACKGROUND

[0002] With the development of automatic driving technology, the demand of line control brake technology is increasingly strong. As a core part of line control brake, the performance of line control brake pedal is paid great attention to. The advantage or disadvantage of line control brake pedal mainly depends on the scheme of pedal simulation. In the related technology, the helical spring of pedal simulator cannot realize high rigidity, needs to be used in combination with a buffer block, the structure is complex, the cost is higher, and the damping feeling is not obvious by using friction type damping, so the force hysteresis demand cannot be met. SUMMARY

[0003] The utility model embodiment provides a pedal simulator, line control brake system and vehicle, improve the pedal feeling, and make pedal simulator simple structure.

[0004] In the first aspect, the utility model provides a pedal simulator, which comprises a seat body, a moving rod movably penetrating the seat body, a matching part of the moving rod for cooperating with a pedal, and a limiting part of the moving rod located on one side of the seat body close to the matching part, a plurality of disc spring groups sleeved on the moving rod and arranged in layers, and a disc spring group at both ends of the layering direction abutting against the seat body and the limiting part respectively, wherein the structures of at least two disc spring groups are different.

[0005] In the above technical scheme, the plurality of disc spring groups are limited by the moving rod and the seat body, and the structures of at least two disc spring groups are different, so that the pedal curve can be divided into multiple groups for accurate simulation, which is beneficial to greatly improving the pedal feeling, and the damping feeling is better by using the damping force of the disc spring group itself, the cost is lower, and the structure is simpler.

[0006] In some embodiments, the heights of the at least two disc spring groups along the layering direction are different.

[0007] In the above technical scheme, the heights of the disc spring groups are different, so that the stiffness of the disc spring groups is different, the stiffness adjustment mode is simple, and the simulation accuracy is easy to improve.

[0008] In some embodiments, the height of the disc spring group along the layering direction is 0.8mm-5mm.

[0009] In the above technical scheme, the damping force range of the disc spring group can be controlled in 10N-200N, the application demand can be met without cooperation with a buffer block or other structures, which is beneficial to simplifying the structure and reducing the cost.

[0010] In some embodiments, at least two of the disc spring groups are provided with through holes penetrating along the stacking direction, and the total open area of the through holes of the at least two disc spring groups is different.

[0011] In the above technical solution, the rigidity of the disc spring group can be changed by providing the through holes, and the disc spring groups can have different rigidity by having different total open areas, so that the plurality of disc spring groups can more accurately simulate the pedal curve and improve the pedal feeling, and the rigidity adjustment of the disc spring group is more flexible.

[0012] In some embodiments, the disc spring group includes two disc springs arranged in a stack, and both of the two disc springs are provided with the through hole corresponding to the same disc spring group, and the through holes of the two disc springs are the same in structure and face each other along the stacking direction.

[0013] In the above technical solution, during the processing of the through holes, the facing through holes of the two disc springs can be processed at one time along the stacking direction, greatly improving the production efficiency. Moreover, the contact area of the two disc springs can be larger to improve the stability of disc spring compression and rebound.

[0014] In some embodiments, the disc spring group includes two disc springs arranged in a stack, and both of the two disc springs are provided with the through hole corresponding to the same disc spring group, and the through holes of the two disc springs are the same in structure and face each other along the stacking direction.

[0015] In the above technical solution, during the processing of the through holes of the two disc springs, the facing two through holes are easier to process and are not easy to interfere with the tooling. Moreover, it is beneficial to increase the contact area and improve the stability of disc spring compression and rebound.

[0016] In some embodiments, the through holes of the plurality of disc spring groups face each other along the stacking direction.

[0017] In the above technical solution, the contact area between adjacent disc spring groups can be larger, which is beneficial to improve the transmission of compression force and rebound force between the plurality of disc spring groups, to improve the overall motion stability of the pedal simulator and improve the pedal curve simulation accuracy.

[0018] In some embodiments, a part of the disc spring groups are provided with through holes penetrating along the stacking direction, and another part of the disc spring groups continuously extends along the circumference of the motion rod.

[0019] In the above technical solution, the rigidity of the continuously extended disc spring group can be as large as possible to meet the rigidity adjustment in a larger range.

[0020] In some embodiments, the plurality of disc spring groups have the same outer contour structure.

[0021] In the technical scheme, the outer contours of the disc spring groups with different structures can be processed by the same tool during processing, thereby reducing production cost.

[0022] In some embodiments, the number of the disc spring groups is 3-20.

[0023] In the technical scheme, the pedal simulator can accurately simulate the pedal curve and reduce the occupied space and cost.

[0024] In some embodiments, the pedal is hinged to the seat body.

[0025] In the technical scheme, the pedal and the movement rod are installed on the same component, which is beneficial to reduce the number of parts and simplify the structure.

[0026] In some embodiments, the pedal simulator further comprises a mounting seat, the pedal is hinged to the mounting seat, and the seat body is detachably mounted to the mounting seat.

[0027] In the technical scheme, the seat body and the mounting seat are detachably connected, so that the integrated component composed of the seat body, the movement rod and the disc spring group can be individually disassembled and replaced, the mounting seat can be adapted to the integrated component with different structures, and the pedal and the mounting seat do not need to be disassembled during the process of disassembling and replacing the integrated component, which is beneficial to improve the universality of the mounting seat and reduce the maintenance and replacement cost.

[0028] In the second aspect, the utility model embodiment further provides a brake-by-wire system, comprising the pedal simulator.

[0029] In the third aspect, the utility model embodiment further provides a vehicle, comprising the brake-by-wire system. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A schematic view of the pedal simulator provided by the utility model embodiment;

[0031] Figure 2 A front view of the pedal simulator provided by the utility model embodiment;

[0032] Figure 3 A left view of the pedal simulator provided by the utility model embodiment;

[0033] Figure 4 A view of the pedal simulator provided by the utility model embodiment along the stacking direction;

[0034] Figure 5 A view of the pedal simulator provided by the utility model embodiment along the stacking direction; Figure 4sectional view along the direction indicated by line A-A;

[0035] Figure 6 A schematic diagram of a vehicle is provided for the embodiments of the present application.

[0036] Reference signs:

[0037] Vehicle 1000; Line control brake system 200; Pedal simulator 100;

[0038] Seat body 10;

[0039] Motion rod 20; Cooperating portion 21; Limiting portion 22;

[0040] Disc spring set 30; Through hole 301; Disc spring 302; First disc spring set 31; Second disc spring set 32; Third disc spring set 33;

[0041] Mounting seat 40; Pedal 50;

[0042] Lamination direction F. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the specification, claims and above description of drawings of the present application, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. The specification, claims and above description of drawings of the present application, the terms "first", "second" and the like are used to distinguish different objects, rather than to describe a specific order or primary and secondary relationship.

[0045] In the present application, "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0046] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, also can be detachable connection, or integrally connected, can be direct connection, also can be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0047] The term "and / or" in the utility model is merely a description of the association relationship of associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist simultaneously and B exists alone. In addition, the character " / " in the utility model generally represents that the associated objects before and after are in an "or" relationship.

[0048] In the embodiments of the utility model, the same reference signs represent the same parts, and for brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the utility model shown in the drawings, and the overall thickness, length and width of the integrated device are only exemplary, and should not constitute any limitation on the utility model.

[0049] "Multiple" in the utility model refers to two or more (including two).

[0050] Vehicles are usually equipped with brake systems for performing braking, and various ways of brake systems are proposed for the safety of drivers and passengers. The conventional brake system mainly adopts the mode of supplying the required hydraulic pressure to the wheel cylinder by using a mechanically connected booster when the driver steps on the brake pedal. However, as the market demand for various braking functions that can closely respond to the operating environment of the vehicle is increasing, in recent years, a brake-by-wire system has been widely used, which is configured to receive the brake intention of the driver in the form of an electrical signal from a pedal displacement sensor that senses the displacement of the pedal when the driver steps on the brake pedal, and operates a hydraulic pressure supply device based on the electrical signal to supply the required hydraulic pressure to the wheel cylinder.

[0051] The brake-by-wire system is provided with a pedal simulator inside the electric booster to form a brake feeling. The pedal simulator forms a brake feeling by the pressure generated by the operation of the master cylinder by the force transmitted when the driver steps on the brake pedal.

[0052] With the development of automatic driving technology, the demand for brake-by-wire technology is increasing. As a core part of brake-by-wire, the performance improvement of brake-by-wire pedal is highly valued. The pros and cons of the brake-by-wire pedal mainly depend on the pedal simulation scheme. In the related technology, the pedal simulator adopts a coil spring, the space is limited, the coil spring is not more than four groups, the transition is abrupt, the pedal feeling is poor, high stiffness cannot be achieved, a buffer block needs to be combined, resulting in a complex structure and high cost. Moreover, the damping scheme of the pedal simulator adopts a friction type, the damping feeling is not obvious, and the force hysteresis demand cannot be met.

[0053] Therefore, an embodiment of the present application proposes a pedal simulator, which comprises a seat body, a moving rod and a plurality of disc spring groups. The moving rod is movably arranged in the seat body, the moving rod has a matching part for cooperating with a pedal, and the moving rod is provided with a limiting part located on one side of the seat body close to the matching part. The plurality of disc spring groups are sleeved on the moving rod and arranged in layers, and the disc spring groups at both ends of the layering direction abut against the seat body and the limiting part respectively. At least two disc spring groups are different in structure.

[0054] In the pedal simulator with the above structure, the disc spring group is used as an elastic element, and the pedal curve is divided into multiple groups by disc spring groups with different structures, so that the pedal feeling is accurately simulated, the transition is smooth, the damping feeling is better, the cost is lower, and the structure is simpler.

[0055] The technical scheme described in the embodiment of the present application is applicable to a brake-by-wire system and a vehicle using the brake-by-wire system.

[0056] The vehicle can be a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle or a range extended vehicle. The brake-by-wire system can be an electronic hydraulic brake (EHB) system, an electronic mechanical brake (EMB) system and a hybrid brake-by-wire (HBBW) system. The hybrid brake-by-wire (HBBW) system is a combination of the electronic hydraulic brake system and the electronic mechanical brake system.

[0057] The EHB system mainly comprises a hydraulic control module, a brake pedal module, a control unit HCU, a brake, various sensors and the like. The brake pedal module mainly comprises a brake pedal, a pedal force sensor, a pedal simulator, a master cylinder, a solenoid valve, an oil storage cup and the like. The EMB system mainly comprises an EMB actuator, a central controller (with an electronic control unit as the core) and a brake pedal module (composed of a pedal displacement sensor and a pedal simulator at the brake pedal).

[0058] Next, with reference to the accompanying drawings, a pedal simulator according to an embodiment of the present application is described.

[0059] Please refer to Figures 1-5 , Figure 1A schematic view of the pedal simulator 100 provided by the embodiment of the present application is shown in the figure; Figure 2 A front view of the pedal simulator 100 provided by the embodiment of the present application is shown in the figure; Figure 3 A left view of the pedal simulator 100 provided by the embodiment of the present application is shown in the figure; Figure 4 A view of the pedal simulator 100 provided by the embodiment of the present application along the stacking direction F is shown in the figure; Figure 5 Figure 4 A sectional view along the direction shown by the line A-A. The pedal simulator 100 comprises a seat body 10, a movement rod 20 and a plurality of disc spring sets 30.

[0060] Specifically, the movement rod 20 is movably arranged in the seat body 10, and the movement rod 20 has a matching part 21 for matching with the pedal 50 so that the movement rod 20 can be moved relative to the seat body 10 under the action of the pedal 50. The movement rod 20 is provided with a limiting part 22 located on the side of the seat body 10 close to the matching part 21. The plurality of disc spring sets 30 are sleeved on the movement rod 20 and arranged in a stack, and the disc spring sets 30 at both ends of the stacking direction F abut against the seat body 10 and the limiting part 22, respectively. At least two disc spring sets 30 are different in structure.

[0061] The seat body 10 can be provided with a sliding groove or a hole or other matching structure for penetrating the movement rod 20, so that the seat body 10 can provide a guide and limiting action for the movement direction of the movement rod 20, and the movement rod 20 can reciprocate along the matching structure of the seat body 10 under the action of the pedal 50 and the disc spring sets 30.

[0062] The matching part 21 can be but is not limited to a spherical or hemispherical structure, and the connection mode of the matching part 21 and the pedal 50 can be but is not limited to abutting or sliding fit, etc., as long as the pedal 50 can drive the movement rod 20 to move when the pedal 50 is stepped on.

[0063] The limiting part 22 and the seat body 10 can provide support for the compression and rebound of the plurality of disc spring sets 30 arranged in a stack from both sides of the stacking direction F. The limiting part 22 can be a protrusion, a flange, a snap spring or the like provided on the movement rod 20; the limiting part 22 and the movement rod 20 can be integrally formed or can be separate parts connected together.

[0064] ​The disc spring group 30 is composed of two disc springs 302 (i.e. butterfly springs). The disc spring 302 refers to a spring that is tapered in the axial direction and bears a load, and the dimension perpendicular to the axial direction decreases from one end to the other end. The dimension of the larger end is the outer diameter of the disc spring 302; the dimension of the smaller end is the inner diameter of the disc spring 302; the axial distance between the two ends is the height of the disc spring 302; the distance between the inner and outer tapered surfaces of the disc spring 302 is the thickness (i.e. the thickness of the plate) of the disc spring 302; and the angle between the connecting line of the two ends and the axis is the inclination angle of the disc spring 302. In addition, the axial section line of the outer and inner tapered surfaces of the disc spring 302 can be a straight line, an outward convex arc or an inward convex arc, etc. The two disc springs 302 in the same disc spring group 30 can be abutted at the larger end or at the smaller end.

[0065] The stacked arrangement of multiple disc spring groups 30 means that multiple disc spring groups 30 are arranged in sequence along the axial direction of the disc spring 302, and the two adjacent disc spring groups 30 abut each other; and the two disc spring groups 30 at the ends are directly abutted and limited by the limiting portion 22 and the seat body 10. In the above structure, the disc spring group 30 is used as an elastic element, and the damping force of the disc spring 302 itself is utilized, without the need for other elastic elements such as a buffer block or a coil spring. There is no friction structure or wet type valve system damping structure, which simplifies the structure of the pedal simulator 100 and reduces the cost.

[0066] In use, the pedal 50 rotates and abuts against the cooperating portion 21 under the action of an external force, thereby driving the moving rod 20 to move relative to the seat body 10 along the hole penetration direction of the seat body 10. In this process, the limiting portion 22 compresses the multiple disc spring groups 30, and the seat body 10 provides support for the compression of the multiple disc spring groups 30. The disc spring group 30 is compressed and deformed to reduce the height, and the deformed disc spring group 30 itself can provide a damping force to simulate the braking feeling. After the external force is removed, the disc spring group 30 can rebound to increase the height and drive the moving rod 20 to move reversely relative to the seat body 10 to reset, and in this process, the seat body 10 provides support for the rebound of the multiple disc spring groups 30.

[0067] In the above structure, only the seat body 10 and the moving rod 20 provide support and limiting for the disc spring group 30, without the need to set a chamber for containing oil. The pedal simulator 100 is formed as a dry-type brake-by-wire pedal simulator 100, with fewer components, a simpler structure and lower cost.

[0068] The different structures of the two disc spring groups 30 mean that at least one of the following parameters of the disc spring 302 is different between the two disc spring groups 30: the outer diameter, the inner diameter, the height, the thickness, the inclination angle, the shape of the inner and outer tapered surfaces, the protrusions or notches on the inner and outer tapered surfaces (such as the position, number and size of the protrusions or notches), etc.

[0069] The two disc spring groups 30 are different in structure, different in rigidity, and different in self-damping force. Thus, the pedal curve is divided into multiple groups, and accurate simulation is achieved. Not only is the transition smooth, but the pedal feeling is greatly improved. Moreover, multiple disc spring groups 30 can match multiple rigidity requirements, and the rigidity requirements of different vehicle models and different manufacturers can be matched by replacing the disc spring groups 30.

[0070] In the multiple disc spring groups 30 of the pedal simulator 100, the structures of the disc spring groups 30 can be different, or the structures of some disc spring groups 30 can be the same and the structures of some disc spring groups 30 can be different. For example Figures 2-5 As shown, the pedal simulator 100 includes 10 disc spring groups 30, including 4 first disc spring groups 31, 4 second disc spring groups 32, and 2 third disc spring groups 33. The structures of the first disc spring groups 31, the second disc spring groups 32, and the third disc spring groups 33 are different from each other.

[0071] According to the pedal simulator 100 of the embodiment of the utility model, the multiple disc spring groups 30 are limited by the movement rod 20 and the seat body 10, and the structures of at least two disc spring groups 30 are different. The pedal curve can be divided into multiple groups, accurate simulation is achieved, the pedal feeling is greatly improved, the damping feeling is better by using the self-damping force of the disc spring group 30, the cost is lower, and the structure is simpler.

[0072] According to some embodiments of the utility model, the heights of the at least two disc spring groups 30 in the stacking direction F are different.

[0073] Here, the height of the disc spring group 30 in the stacking direction F refers to the distance between one end and the other end of the disc spring group 30 in the stacking direction F in the state that the disc spring group 30 is not compressed, that is, the distance between the two ends of the disc spring 302 in the axial direction of the same disc spring group 30, as shown in H. Figure 2

[0074] In the embodiment in which the disc spring group 30 includes two disc springs 302 arranged in layers, the height of the disc spring group 30 can be adjusted by changing the inclination angle of the disc spring 302, and the height of the disc spring group 30 can also be adjusted by changing the size (such as the outer diameter and the inner diameter) of the outer contour of the disc spring 302, and the like, which are all within the protection scope of the utility model.

[0075] The different heights of the disc spring groups 30 make the rigidity of the disc spring groups 30 different, the rigidity adjustment mode is simple, and the simulation accuracy is easy to improve.

[0076] In some embodiments, the height of the disc spring group 30 in the stacking direction F is 0.8mm-5mm, that is, 0.8mm≤H≤5mm. For example, in some specific embodiments, the height of the disc spring group 30 in the stacking direction F can be 0.8mm, 1mm, 2mm, 3mm, 4mm, and 5mm, and the like. ​

[0077] In the above value range, the damping force range of the disc spring set 30 can be controlled in 10N-200N, without cooperation with other structures such as a buffer block, to meet the application requirements, which is beneficial to simplify the structure and reduce the cost.

[0078] It should be noted that in the embodiment in which the heights of the at least two disc spring sets 30 are different, the heights of the different disc spring sets 30 can all be in the range of 0.8mm-5mm, so that the plurality of disc spring sets 30 can accurately simulate the pedal curve while reducing the cost.

[0079] According to some embodiments of the present application, as shown in Figures 2-5 The at least two disc spring sets 30 are provided with through holes 301 penetrating along the stacking direction F, and the total opening area of the through holes 301 of the at least two disc spring sets 30 is different.

[0080] The present application does not make special restrictions on the opening shape of the through hole 301, which can be any shape such as circular, sector, trapezoidal, oval, semicircular, etc. The through hole 301 can be provided at one end edge of the disc spring 302 as shown in Figure 4 and Figure 5 The through hole 301 can also be spaced apart from the two end edges of the disc spring 302, which is within the protection scope of the present application.

[0081] The total opening area of the through hole 301 refers to the sum of the opening areas of all the through holes 301 on the disc spring set 30. For example, in the case that the number of through holes 301 on the two disc spring sets 30 is different, the shape and size of the individual through hole 301 of the two disc spring sets 30 can be the same, and the total opening area is changed by changing the number of through holes 301. For another example, the number of through holes 301 on the two disc spring sets 30 is the same, and the total opening area can be changed by at least partially changing the opening area of the through hole 301.

[0082] By providing the through hole 301, the stiffness of the disc spring set 30 can be changed, and by changing the total opening area, the disc spring set 30 can have different stiffness, so that the plurality of disc spring sets 30 can more accurately simulate the pedal curve, improve the pedal feeling, and the stiffness adjustment of the disc spring set 30 is more flexible.

[0083] It should be noted that in the embodiment in which the total opening area of the through hole 301 of the at least two disc spring sets 30 is different, the heights of the different disc spring sets 30 can be the same or different, and the thicknesses of the disc springs 302 can be the same or different. In the embodiment in which the heights of the disc spring sets 30 are the same and the thicknesses of the disc springs 302 are the same, only the total opening area of the through hole 301 needs to be changed to realize the stiffness adjustment, without the need to configure disc springs 302 of multiple thicknesses, which is beneficial to improve the universality of the disc spring 302 and reduce the production cost.

[0084] In some embodiments, as shown in Figure 4As shown, the disc spring set 30 includes two disc springs 302 arranged in a stack, and the two disc springs 302 are both provided with the through hole 301.

[0085] The same structure of the through hole 301 means that the shape and the opening area of the through hole 301 are the same. The two through holes 301 are opposite along the stacking direction F, which means that the projections of the two through holes 301 on the same projection plane are coincident.

[0086] In the above embodiment, during the processing of the through hole 301, the opposite through holes 301 of the two disc springs 302 can be processed at one time along the stacking direction F, which greatly improves the production efficiency. In addition, the contact area of the two disc springs 302 can be larger, so as to improve the stability of the compression and rebound of the disc spring 302.

[0087] In some embodiments, the disc spring set 30 includes two disc springs 302 arranged in a stack, and the two disc springs 302 are both provided with the through hole 301. The projection of the through hole 301 of one of the disc springs 302 along the stacking direction F is located within the projection of the through hole 301 of the other disc spring 302 along the stacking direction F.

[0088] In other words, the shape or the opening area of the through hole 301 of the two disc springs 302 of the same disc spring set 30 can be different, but the projection of the smaller through hole 301 is located within the projection of the larger through hole 301. Thus, during the processing of the through holes 301 of the two disc springs 302, the opposite two through holes 301 are easier to process and are not easy to interfere with the tooling. In addition, it is beneficial to increase the contact area and improve the stability of the compression and rebound of the disc spring 302.

[0089] In some embodiments, as shown in FIG. 1, Figures 2-5 The through holes 301 of the plurality of disc spring sets 30 are opposite along the stacking direction F. The contact area between adjacent disc spring sets 30 can be larger, which is beneficial to improve the transmission of the compression force and the rebound force between the plurality of disc spring sets 30, so as to improve the overall motion stability of the pedal simulator 100 and improve the pedal curve simulation accuracy.

[0090] According to some embodiments of the present application, as shown in FIG. 1, Figures 2-5 A part of the disc spring sets 30 are provided with the through hole 301 penetrating along the stacking direction F, and the other part of the disc spring sets 30 extends continuously along the circumference of the motion rod 20. The disc spring set 30 continuously extends along the circumference of the motion rod 20 means that the disc spring set 30 is not provided with the through hole 301 or the notch, and the rigidity of the disc spring set 30 can be as large as possible to meet the rigidity adjustment in a larger range.

[0091] For example, as shown in FIG. 1, Figures 2-5In the specific example shown, the first disc spring set 31 is not provided with the through hole 301 and continuously extends along the circumference of the movement rod 20; the second disc spring set 32 and the third disc spring set 33 are both provided with the through hole 301, the number and the arrangement position of the through hole 301 are the same, and the opening area of the through hole 301 of the second disc spring set 32 is smaller than that of the third disc spring set 33. The stiffness of the first disc spring set 31, the second disc spring set 32 and the third disc spring set 33 decreases gradually.

[0092] According to some embodiments of the present application, the outer contour structures of the plurality of disc spring sets 30 are the same. The outer contour structures of the disc spring sets 30 are the same in that the shapes and sizes of the outer contours of the disc spring sets 30 are the same. Here, the outer contour of the disc spring set 30 includes the opening shape and size of the axial two ends (the inner diameter end and the outer diameter end) of the disc spring set 30. For example, the outer contours of the disc spring sets 30 are all circular and have equal diameters.

[0093] Therefore, in the machining process, the outer contours of disc spring sets 30 with different structures can be machined by the same tooling, thereby reducing production costs. Moreover, after the adjacent disc spring sets 30 are arranged in a stacked manner, the abutting area can be increased, thereby improving the stability of compression and rebound of the plurality of disc spring sets 30, and further improving the simulation accuracy.

[0094] In some embodiments of the present application, the number of disc spring sets 30 is 3-20. For example, in some specific embodiments, the number of disc spring sets 30 is 3, 5, 10, 15 and 20, etc.

[0095] If the number of disc spring sets 30 is too small, the number of divided intervals of the pedal curve is too small, which is not conducive to improving the simulation accuracy; if the number of disc spring sets 30 is too large, it will result in too large occupied space. Within the above value range, the pedal simulator 100 can accurately simulate the pedal curve, and can also reduce the occupied space and reduce the cost.

[0096] In some embodiments, the pedal 50 is hinged to the seat body 10. In other words, the pedal 50 and the movement rod 20 are installed on the same component, which is conducive to reducing the number of parts and simplifying the structure.

[0097] In some other embodiments, as shown in the figure, Figure 1 The pedal simulator 100 further comprises a mounting seat 40, the pedal 50 is hinged to the mounting seat 40, and the seat body 10 is detachably mounted to the mounting seat 40.

[0098] The pedal 50 is hinged to the mounting seat 40, that is, the pedal 50 is rotatable relative to the mounting seat 40, so that the pedal 50 can rotate and press the movement rod 20 under the action of an external force, and reset when the external force is removed. The connection mode of the seat body 10 and the mounting seat 40 can be, but is not limited to, clamping, fastener connection, plug-in connection, etc.

[0099] The integrated component composed of the seat body 10, the movement rod 20 and the disc spring group 30 can be separately disassembled and replaced by the detachable connection of the seat body 10 and the mounting seat 40, the mounting seat 40 can be adapted to the integrated component with different structures (such as including different numbers or different structures of disc spring groups 30), and the pedal 50 does not need to be disassembled from the mounting seat 40 in the process of disassembling and replacing the integrated component, which is beneficial to improve the universality of the mounting seat 40 and reduce the maintenance and replacement cost.

[0100] As shown in Figure 6 The brake-by-wire system 200 according to the second aspect of the present application comprises the pedal simulator 100 according to the first aspect of the present application. Thus, by adopting the pedal simulator 100, the pedal curve can be divided into multiple groups for accurate simulation, which is beneficial to greatly improve the pedal feeling, and the damping feeling is better, the cost is lower, and the structure is simpler by using the damping force of the disc spring group 30 itself.

[0101] As shown in Figure 6 The vehicle 1000 according to the third aspect of the present application comprises the brake-by-wire system 200 according to the second aspect of the present application. Thus, by adopting the brake-by-wire system 200, the pedal curve can be divided into multiple groups for accurate simulation, which is beneficial to greatly improve the pedal feeling, and the damping feeling is better, the cost is lower, and the structure is simpler by using the damping force of the disc spring group 30 itself.

[0102] The pedal simulator 100 according to one embodiment of the present application and the vehicle 1000 having the same will be described below with reference to the accompanying drawings.

[0103] As shown in Figures 1-6 The vehicle 1000 comprises a brake-by-wire system 200, and the brake-by-wire system 200 comprises a pedal simulator 100, a pedal sensor, a controller and a hydraulic control assembly. The pedal simulator 100 comprises a pedal 50, a mounting seat 40, a seat body 10, a movement rod 20 and 10 disc spring groups 30, including 4 first disc spring groups 31, 4 second disc spring groups 32 and 2 third disc spring groups 33. The disc spring 302 of the first disc spring group 31 is not provided with a through hole 301, the disc spring 302 of the second disc spring group 32 and the third disc spring group 33 is provided with a through hole 301, and the through hole 301 of the second disc spring group 32 is smaller than the through hole 301 of the third disc spring group 33. The axial height of the disc spring group 30 is any value in the range of 0.8mm-5mm.

[0104] The seat body 10 can provide support for the compression and rebound of the disc spring group 30. The end of the movement rod 20 away from the pedal 50 can be provided with a rotating shaft, so that the movement rod 20 can be appropriately rotated during installation and application to adapt to installation and processing errors and other disturbances.

[0105] When the driver steps on the brake pedal 50, the pedal simulator 100 is moved under the action of the pedal 50 and compresses the disc spring set 30, the pedal sensor collects the pedal 50 stroke information and force information, etc., and the controller controls the hydraulic control assembly to work according to the collected information of the pedal sensor and the current driving state of the vehicle 1000, so as to realize braking.

[0106] In the above embodiment, the disc spring 302 is used as the elastic element, and the pedal curve is divided into multiple groups, so that the simulation is accurate, the defect of poor pedal feeling of the screw spring scheme in the related art is overcome, the pedal feeling is greatly improved, and the transition is smooth.

[0107] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0108] The preferred embodiments of the present application have been described above by way of example only, and are not used to limit the present application, and for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pedal simulator characterized by, The pedal simulator comprises: a seat body; a movement rod movably arranged in the seat body, the movement rod having a matching part for matching with a pedal, and the movement rod being provided with a limiting part on a side of the seat body close to the matching part; a plurality of disc spring groups, the disc spring groups being sleeved on the movement rod and arranged in a stacked manner, and the disc spring groups at both ends of the stacking direction being respectively abutted against the seat body and the limiting part, wherein at least two of the disc spring groups are different in structure; the movement rod being provided with a rotating shaft at an end of the seat body away from the pedal.

2. The pedal simulator of claim 1, wherein The at least two disc spring groups are different in height along the stacking direction.

3. The pedal simulator of claim 1, wherein, The height of the disc spring group along the stacking direction is 0.8mm-5mm.

4. The pedal simulator of claim 1, wherein, The at least two disc spring groups are provided with through holes penetrating along the stacking direction, and the total opening area of the through holes of the at least two disc spring groups is different.

5. The pedal simulator of claim 4, wherein, The disc spring group comprises two disc springs arranged in a stacked manner, and the two disc springs are provided with the through holes, the through holes of the two disc springs are the same in structure and face each other along the stacking direction.

6. The pedal simulator of claim 4, wherein, The disc spring group comprises two disc springs arranged in a stacked manner, and the two disc springs are provided with the through holes, wherein the projection of the through hole of one of the disc springs along the stacking direction is located in the projection range of the through hole of the other disc spring along the stacking direction.

7. The pedal simulator of claim 4, wherein The through holes of the plurality of disc spring groups face each other along the stacking direction.

8. Pedal simulator according to any of claims 1-7, characterized in that, Part of the disc spring groups are provided with the through holes penetrating along the stacking direction, and the other part of the disc spring groups continuously extend along the circumferential direction of the movement rod.

9. The pedal simulator of claim 1, wherein, The plurality of disc spring groups are the same in outer contour structure.

10. The pedal simulator of claim 1, wherein, The number of the disc spring groups is 3-20.

11. The pedal simulator according to claim 1, wherein: the pedal is hinged to the seat body; or the pedal simulator further comprises a mounting seat, the pedal is hinged to the mounting seat, and the seat body is detachably mounted on the mounting seat.

12. A brake-by-wire system characterized by, The pedal simulator comprises the pedal simulator according to any one of claims 1-11.

13. A vehicle characterized by comprising: The brake-by-wire system comprises the pedal simulator according to claim 12.

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