CN110027533B

CN110027533B - Pedal feel simulator for vehicle and vehicle with same

Info

Publication number: CN110027533B
Application number: CN201810031462.8A
Authority: CN
Inventors: 赖伟恒; 王铁君; 李传博; 刘苏丽; 郑祖雄
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2018-01-12
Filing date: 2018-01-12
Publication date: 2022-08-09
Anticipated expiration: 2038-01-12
Also published as: CN110027533A

Abstract

The invention discloses a pedal feel simulator for a vehicle and the vehicle with the pedal feel simulator. The piston is arranged in the shell in a reciprocating manner, the moving piece is movably matched with one end of the piston, the moving piece moves to drive the piston to move, and the driving assembly is matched with the moving piece to drive the moving piece to reciprocate; the two ends of the first elastic part are respectively abutted against the piston and the moving part, and the two ends of the push rod are respectively connected with the other end of the piston and the pedal. The pedal feel simulator for the vehicle has high response speed and good braking effect, and can provide good braking feel, particularly pedal braking feel, for the driver.

Description

Pedal feel simulator for vehicle and vehicle with same

Technical Field

The invention relates to the technical field of vehicles, in particular to a pedal feeling simulator for a vehicle and the vehicle with the pedal feeling simulator.

Background

In the related art, a pedal in a vehicle mainly adopts a hydraulic transmission mechanism or a pneumatic transmission mechanism to perform force transmission, so that the vehicle is braked. However, the brake system using the hydraulic transmission mechanism or the pneumatic transmission mechanism has a slow response speed and poor braking performance, which brings great inconvenience to the actual operation of the driver.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, the present invention proposes a pedal feel simulator for a vehicle, which has a fast response speed and a good braking effect, and at the same time can provide a good "braking feel", particularly a pedal braking feel, to a driver.

The invention also provides a vehicle with the pedal feel simulator.

A pedal feel simulator for a vehicle according to an embodiment of a first aspect of the invention, the vehicle including a pedal, the pedal feel simulator including: a housing; a piston reciprocally disposed within the housing; the moving piece is movably matched with one end of the piston and moves to drive the piston to move; the driving assembly is matched with the moving piece to drive the moving piece to move in a reciprocating manner; the two ends of the first elastic piece respectively abut against the piston and the moving piece; and the first end of the push rod is connected with the other end of the piston, and the second end of the push rod is suitable for being connected with the pedal.

According to the pedal feel simulator for the vehicle provided by the embodiment of the invention, the piston, the moving part and the first elastic part are arranged, so that when the vehicle needs to be braked and a driver steps on a pedal, the first elastic part can apply elastic force to the push rod to provide basic pedal counterforce, the reciprocating movement of the moving part is controlled through the driving assembly to adjust the deformation quantity of the first elastic part in real time, the pedal counterforce corresponding to the adjusted elastic force is close to the optimal target pedal counterforce to be matched with the running state of the real vehicle, therefore, when the pedal feel simulator is applied to the vehicle, an electric signal can be adopted to transmit a brake signal, the signal transmission is rapid, the brake response is rapid, the response is sensitive, good brake feel, especially the pedal brake feel, can be provided for the driver, the brake feel is more consistent with the human body, and the brake effect of a brake system of the vehicle is improved (for example, the brake response time is shortened, More rational braking force) and driver's braking feel; the piston and the moving part are separated by the first elastic part, so that when the push rod drives the piston to move, impact between the piston and the moving part is avoided, and the influence on the movement of the push rod caused by the failure of the driving assembly is reduced to the maximum extent; through setting the elastic characteristic line of the first elastic element, the elastic characteristic line of the first elastic element is closer to a pedal target curve, namely, a pedal counter force corresponding to an initial elastic force of the first elastic element is closer to an optimal target pedal counter force, and design requirements are met more easily, so that the burden of a driving assembly is reduced, regulation and control of pedal braking feeling can be realized, for example, the relation between the optimal target pedal counter force and a pedal stroke can be changed, different requirements of different drivers on the braking feeling can be met, the control habit of the drivers can be adapted, and the regulation is convenient; the pedal feeling simulator has strong integrity, can realize modular design and is convenient to produce, transport, install and use.

According to some embodiments of the invention, the pedal feel simulator further comprises: and the second elastic piece is covered on the piston, and two ends of the second elastic piece are respectively matched on the outer wall of the piston and the inner wall of the shell.

According to some embodiments of the invention, the pedal feel simulator further comprises: a pressure sensor provided between the push rod and the piston to detect a pressure between the push rod and the piston; and the displacement detection device is used for detecting the displacement of the push rod.

According to some embodiments of the invention, the drive assembly comprises: a driver; the planetary gear mechanism comprises a sun gear, a planet carrier and an outer gear ring, the planet gear is respectively meshed with the sun gear and the outer gear ring, the planet carrier is arranged on the planet gear and synchronously rotates with the planet gear, and the driver is matched with the sun gear to drive the sun gear to rotate; the central screw rod is matched with the moving piece to convert the rotation of the central screw rod to the movement of the moving piece, and the central screw rod is arranged on the planet carrier to be driven by the planet carrier to rotate.

According to some embodiments of the invention, the housing includes a main cylinder and a mounting seat, one side of the main cylinder is open to form a mounting opening, the mounting seat is arranged at the mounting opening, the piston is arranged in the main cylinder, a first end of the push rod passes through the mounting seat and extends into the main cylinder to be connected with the piston, and the push rod is movably matched with the mounting seat.

According to some embodiments of the invention, the displacement detecting means is provided on the main cylinder.

According to some embodiments of the invention, the moving member is disposed in the housing, an extending hole is disposed on an end wall of the housing, and one end of the central screw rod passes through the extending hole to be matched with the planet carrier.

According to some embodiments of the invention, the central screw comprises a central rod and an annular boss, the central rod is respectively engaged with the planet carrier and the moving member, and the boss is provided on the outer peripheral wall of the central rod; the pedal feeling simulator also comprises a thrust bearing, wherein the thrust bearing is arranged in the shell, and the thrust bearing is covered on the central rod and is positioned between the boss and the inner wall of the shell.

According to some embodiments of the invention, the pedal feel simulator further comprises a bushing that is sleeved over a portion of the central lead screw that is located within the extension aperture.

According to some embodiments of the invention, the pedal feel simulator further comprises a retainer ring that is sleeved over a portion of the central lead screw that extends out of the housing.

According to some embodiments of the invention, the pedal feel simulator further comprises a housing case provided on the housing, the driver and the planetary gear mechanism are respectively provided within the housing case, and the outer ring gear is provided on the housing case.

According to some embodiments of the invention, the outer ring gear and the outer housing shell are an integrally formed piece.

According to some embodiments of the invention, an end of the piston is housed on the moving member for moving engagement with the moving member, and the first resilient member is provided in the piston.

A vehicle according to an embodiment of a second aspect of the invention includes: the vehicle body is provided with an electronic control unit; the pedal is rotatably arranged on the vehicle body; the pedal feel simulator is arranged on the vehicle body and is the pedal feel simulator according to the embodiment of the first aspect of the invention, the second end of the push rod is connected with the pedal, and the pressure sensor, the displacement detection device and the driver are respectively connected with the electronic control unit.

According to the vehicle provided by the embodiment of the invention, by adopting the pedal feel simulator, an electromechanical layout can be formed in the vehicle, hydraulic pipelines, vacuum boosting and the like do not need to be arranged, the arrangement is flexible, the arrangement of the whole structure of the vehicle is convenient, the quality of the vehicle is reduced, even if a line control technology is adopted on the vehicle, namely, an operating mechanism and an executing mechanism of a vehicle braking system are not directly connected, the pedal feel simulator is adopted, so that the vehicle can simulate the pedal braking feel while finishing the acquisition of pedal action information and sending the pedal action information to a line control system controller to realize corresponding functions, a driver can feel the braking feel consistent with that of a pedal with the traditional structure when stepping on the pedal, the braking effect of the braking system of the vehicle and the braking feel of the driver are improved, and the electric braking of the vehicle is realized. Wherein, the pedal feel simulator can be installed under the floor of automobile body, and the pedal feel simulator can not occupy the space in cockpit and engine compartment this moment, has further made things convenient for arranging of vehicle overall structure, has promoted the travelling comfort of vehicle.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a pedal feel simulator for a vehicle according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an alternate angular configuration of the pedal feel simulator shown in FIG. 1;

FIG. 3 is a partial schematic view of the pedal feel simulator shown in FIG. 1;

FIG. 4 is another partial schematic view of the pedal feel simulator shown in FIG. 1;

FIG. 5 is yet another partial schematic view of the pedal feel simulator shown in FIG. 1;

FIG. 6 is yet another partial schematic view of the pedal feel simulator shown in FIG. 1;

FIG. 7 is yet another partial schematic view of the pedal feel simulator shown in FIG. 1;

FIG. 8 is a schematic diagram of the connection between the pedal feel simulator and the pedal and electronic control unit shown in FIG. 1;

FIG. 9 is a schematic view showing the connection relationship between the pedal feel simulator shown in FIG. 8 and the pedal, electronic control unit;

fig. 10 is a schematic diagram of the operation principle of the pedal feel simulator and the pedal, electronic control unit shown in fig. 8.

Reference numerals:

a pedal feeling simulator 100, a first fastener 100a, a second fastener 100b, a third fastener 100c,

An electronic control unit 101, a pedal 102, a connecting portion 102a,

A support 103, a support rotating shaft 103a, a connecting assembly 104, a matching groove 104a, a first stopping portion 104b,

A housing 1, a main cylinder 11, an installation base 12, a second stopper 12a,

An end wall 111, a protruding hole 111a, a first connecting portion 112, a second connecting portion 113,

A piston 2, a moving member 3,

A driver 41, a limit projection 41a, an output shaft 41b,

Planetary gear mechanism 42, sun gear 421, planetary gear 422, planetary carrier 423, mating shaft 423a, external ring gear 424,

A central screw 43, a central rod 431, a boss 432,

A first elastic element 51, a second elastic element 52, a push rod 6, a first end 60a, a second end 60b,

A pressure sensor 7, a displacement detecting device 8, a thrust bearing 9,

Bush 10a, retaining ring 10b, outer cover shell 10c, spacing recess 10 d.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A pedal feel simulator 100 for a vehicle according to an embodiment of the present invention will be described with reference to fig. 1 to 10.

As shown in fig. 1 to 10, a pedal feel simulator 100 for a vehicle according to an embodiment of the present invention, the vehicle including a pedal 102, the pedal feel simulator 100 includes a housing 1, a piston 2, a moving member 3, a driving assembly, a first elastic member 51, and a push rod 6.

The piston 2 is arranged in the shell 1 in a reciprocating manner, the moving part 3 is movably matched with one end of the piston 2, the moving part 3 moves to drive the piston 2 to move, the driving assembly is matched with the moving part 3 to drive the moving part 3 to reciprocate, two ends of the first elastic part 51 are respectively abutted against the piston 2 and the moving part 3, the first end 60a of the push rod 6 is connected with the other end of the piston 2, and the second end 60b of the push rod 6 is suitable for being connected with the pedal 102.

For example, as shown in fig. 1 to 10, a housing space is defined in the housing 1, the piston 2 is disposed in the housing space and the piston 2 can reciprocate in the axial direction of the pedal feel simulator 100, the moving member 3 can be movably engaged with the above-mentioned axial end of the piston 2 and the moving member 3 can reciprocate in the axial direction of the pedal feel simulator 100 under the driving action of the driving assembly. Here, the phrase "the moving member 3 is movably engaged with one end of the piston 2" may mean that the moving member 3 is in contact with one end of the piston 2 and the moving member 3 is movable relative to the piston 2, or that the moving member 3 is not in contact with one end of the piston 2 and the moving member 3 is movable relative to the piston 2.

One end of the first elastic element 51 can be abutted against the piston 2, and the other end of the first elastic element 51 can be abutted against the moving element 3, so that when the moving element 3 moves relative to the piston 2, the deformation amount of the first elastic element 51 changes, thereby changing the elastic force exerted on the moving element 3 and the piston 2 by the first elastic element 51, and according to the elastic force, the driving assembly drives the moving element 3 to reciprocate to change the deformation amount of the first elastic element 51, thereby further adjusting the elastic force exerted on the moving element 3 and the piston 2 by the first elastic element 51, and providing good pedal braking feeling for a driver. When the driver does not step on the pedal 102 and the pedal feel simulator 100 is in the initial position, the first elastic member 51 may be in a pre-compressed state or a natural state (not pre-compressed).

When the vehicle needs to be braked and the pedal 102 drives the push rod 6 to move along the axial direction of the pedal feel simulator 100, because the first end 60a of the push rod 6 is connected with the other end of the piston 2, the push rod 6 can drive the piston 2 to move in the moving process, and at the moment, the deformation amount of the first elastic member 51 which is stopped between the piston 2 and the moving member 3 changes, so that the first elastic member 51 can apply initial elastic force to the piston 2, and the piston 2 is connected with the pedal 102 through the push rod 6, and therefore the first elastic member 51 can provide basic pedal counterforce.

When the pedal feel simulator 100 is applied to a vehicle, when the vehicle needs braking, a driver presses the pedal 102 to transmit the stepping force of the driver to the piston 2 and the first elastic member 51 through the push rod 6, and the first elastic member 51 can apply an initial elastic force to the push rod 6 through the piston 2 to provide a basic pedal reaction force, so that the 'braking feel' of the pedal 102 when a braking system of the vehicle works is ensured; the detecting device on the vehicle, such as a sensor, may detect parameters such as the magnitude of the pedaling force, the axial movement displacement of the push rod 6 or the piston 2, and the moving speed of the push rod 6 or the piston, and transmit the detection result to an Electronic Control Unit 101 (ECU) of the vehicle to analyze the detection result, so as to calculate a difference between the optimal target pedal reaction force and the basic pedal reaction force, at this time, the Electronic Control Unit may Control the driving component to operate according to the optimization result, the driving component drives the moving component 3 to reciprocate to adjust the deformation of the first elastic member 51 in real time, so that the adjusted first elastic member 51 may apply an adjusting elastic force to the push rod 6 through the piston 2, the adjusting elastic force is fed back to the driver through the piston 2, the push rod 6 and the pedal 102, and the pedal reaction force corresponding to the adjusting elastic force approaches the optimal target pedal reaction force to match the operating state of the real vehicle, thereby improving the pedal feeling effect when the driver steps on the pedal 102 and improving the operation comfort of the driver; meanwhile, the electronic control unit 101 may analyze a final braking scheme according to the optimal target pedal reaction force in combination with the running state of the real vehicle and the real-time road condition, and transmit a corresponding signal to the actuator to implement braking of the vehicle. When the vehicle is not braked, the driver releases the pedal 102, and the driving assembly drives the moving member 3 to move to change the elastic force of the first elastic member 51, and the piston 2 can move to the initial position under the elastic force of the first elastic member 51, so that the piston 2 pushes the pedal 102 to the initial position through the push rod 6.

Here, it should be noted that the "brake feeling" is a comprehensive feeling, and may include a pedal brake feeling, which is the most important component, a vehicle brake deceleration felt by the driver, an audible brake noise, a visual vehicle deceleration, and the like.

According to the pedal feel simulator 100 for the vehicle of the embodiment of the invention, by arranging the piston 2, the moving member 3 and the first elastic member 51, when the vehicle needs to be braked and a driver steps on the pedal 102, the first elastic member 51 can apply an elastic force to the push rod 6 to provide a basic pedal reaction force, the reciprocating movement of the moving member 3 is controlled by the driving assembly to adjust the deformation amount of the first elastic member 51 in real time, so that the pedal reaction force corresponding to the adjusted elastic force approaches to an optimal target pedal reaction force to match with the running state of the real vehicle, therefore, when the pedal feel simulator 100 is applied to the vehicle, a braking signal can be transmitted by using an electric signal, the signal transmission is rapid, the braking response is rapid, the reaction is sensitive, and simultaneously, a good "braking feel", especially the pedal braking feel, can be provided for the driver, so that the "braking feel" more conforms to the human body feel, thereby improving the braking effect of the braking system of the vehicle (for example, the braking response time is shortened, the braking force is more reasonable) and the braking feeling of the driver; the piston 2 and the moving part 3 are separated by the first elastic part 51, so that when the push rod 6 drives the piston 2 to move, impact between the piston 2 and the moving part 3 is avoided, and the influence on the movement of the push rod 6 caused by the failure of a driving assembly is reduced to the maximum extent; by setting the elastic characteristic line of the first elastic element 51, the elastic characteristic line of the first elastic element 51 is closer to a pedal target curve, namely, a pedal counter force corresponding to an initial elastic force of the first elastic element 51 is closer to an optimal target pedal counter force, so that design requirements are met more easily, the burden of a driving assembly is reduced, and regulation and control of pedal braking feeling can be realized, for example, the relation between the optimal target pedal counter force and the stroke of the pedal 102 can be changed, so that different requirements of different drivers on the braking feeling are met to adapt to the operation habits of the drivers, and the regulation is convenient; the pedal feel simulator 100 has strong integrity, can realize modular design, and is convenient to produce, transport, install and use.

Further, the pedal feel simulator 100 further includes a second elastic member 52, the second elastic member 52 is sleeved on the piston 2, and both ends of the second elastic member 52 are respectively fitted on the outer wall of the piston 2 and the inner wall of the housing 1. That is, when the driver does not step on the pedal 102 and the pedal feel simulator 100 is in the initial position, both ends of the second elastic member 52 may abut against the outer wall of the piston 2 and the inner wall of the housing 1, respectively, or both ends of the second elastic member 52 may be spaced apart from the outer wall of the piston 2 and the inner wall of the housing 1, respectively, or one end of the second elastic member 52 may abut against one of the outer wall of the piston 2 and the inner wall of the housing 1, and the other end may be spaced apart from the other of the outer wall of the piston 2 and the inner wall of the housing 1. Thus, by providing the second elastic member 52, the second elastic member 52 can provide the base pedal reaction force when the moving distance of the piston 2 with respect to the housing 1 reaches the set value, and the set value can be equal to or greater than zero.

For example, in the example of fig. 7 and 8, when the driver does not step on the pedal 102 and the pedal feel simulator 100 is in the initial position, one end of the second elastic member 52 abuts against the outer wall of the piston 2 and the other end of the second elastic member 52 abuts against the inner wall of the housing 1, the second elastic member 52 may be in the pre-compressed state or the natural state, so that when the driver starts to step on the pedal 102 to move the piston 2 relative to the housing 1, the deformation amount of the second elastic member 52 starts to change, that is, the set value is zero, thereby changing the elastic force applied by the second elastic member 52 on the housing 1 and the piston 2, so that the second elastic member 52 can also provide the basic pedal reaction force. Thus, by providing the second elastic member 52, the elastic characteristic line after the first elastic member 51 and the second elastic member 52 are combined has diversity, and the elastic characteristic line after the first elastic member 51 and the second elastic member 52 are combined is further brought closer to the pedal target curve, that is, the pedal reaction force corresponding to the sum of the elastic forces of the first elastic member 51 and the second elastic member 52 is further brought closer to the optimal target pedal reaction force, thereby further reducing the load on the drive unit; and the second elastic member 52 can space the piston 2 from the inner wall of the housing 1, preventing impact between the piston 2 and the housing 1.

Specifically, the pedal feel simulator 100 is applied to a vehicle in which, when the vehicle requires braking, a driver depresses a pedal 102 to transmit a driver's depression force to the piston 2, the first elastic member 51, and the second elastic member 52 through the push rod 6, and the first elastic member 51 and the second elastic member 52 may apply an initial elastic force to the push rod 6 to provide a base pedal reaction force; and the electronic control unit on the vehicle controls the driving assembly to operate according to the detection result of the detection device, so that the driving assembly drives the moving member 3 to reciprocate to adjust the deformation quantity of the first elastic member 51 in real time, thereby adjusting the elastic force exerted by the first elastic member 51 on the piston 2, and enabling the pedal reaction force corresponding to the sum of the elastic forces of the first elastic member 51 and the second elastic member 52 to approach or reach the optimal target pedal reaction force, thereby improving the pedal feeling effect when the driver steps on the pedal 102.

When both ends of the second elastic member 52 are spaced apart from the outer wall of the piston 2 and the inner wall of the housing 1, or one end of the second elastic member 52 may be stopped against one of the outer wall of the piston 2 and the inner wall of the housing 1 and the other end may be spaced apart from the other of the outer wall of the piston 2 and the inner wall of the housing 1, the second elastic member 52 is in a natural state, the driver starts to step on the pedal 102 so that the piston 2 moves relative to the housing 1, when the moving distance of the piston 2 relative to the housing 1 reaches the set value, the two ends of the second elastic element 52 respectively stop against the outer wall of the piston 2 and the inner wall of the housing 1, the piston 2 continues to move so that the deformation amount of the second elastic element 52 begins to change, i.e., the above-mentioned set value is larger than zero, thereby changing the elastic force exerted by the second elastic member 52 on the housing 1 and the piston 2, so that the second elastic member 52 can also provide the basic pedal reaction force.

Specifically, the pedal feel simulator 100 is applied to a vehicle, when the vehicle needs to be braked, a driver presses a pedal 102 to transmit a stepping force of the driver to the piston 2 through the push rod 6, when the stepping force is small, only the first elastic member 51 applies an initial elastic force to the push rod 6 to provide a basic pedal reaction force, and the driving assembly drives the moving member 3 to reciprocate to adjust the deformation amount of the first elastic member 51 in real time, so as to adjust the elastic force applied by the first elastic member 51 to the piston 2; when the pedaling force is large, the first elastic member 51 and the second elastic member 52 can apply an initial elastic force to the push rod 6 together to provide a basic pedal reaction force, the driving assembly drives the moving member 3 to reciprocate to adjust the deformation amount of the first elastic member 51 in real time, so as to adjust the elastic force applied by the first elastic member 51 on the piston 2, and the pedal reaction force corresponding to the sum of the elastic forces of the first elastic member 51 and the second elastic member 52 approaches or reaches an optimal target pedal reaction force, thereby improving the pedal feeling effect when the driver steps on the pedal 102.

It is understood that the pedal feel simulator 100 may further include a third elastic member, and the number and specific position of the third elastic member may be specifically set according to actual conditions, so long as the third elastic member can apply elastic force to the piston 2 or the push rod 6. For example, the third elastic member may be disposed between the second elastic member 52 and the piston 2, and two ends of the third elastic member may be respectively fitted on the outer wall of the piston 2 and the inner wall of the housing 1, or the third elastic member may be further disposed at an interval from the second elastic member 52 along the axial direction of the piston 2, and at this time, two ends of the third elastic member may be respectively fitted on the outer wall of the piston 2 and the inner wall of the housing 1, so that by disposing the third elastic member, when any one of the second elastic member and the third elastic member fails, the other one may continue to provide an elastic force to ensure the normal operation of the pedal feel simulator 100, thereby increasing the safety factors of the second elastic member 52 and the third elastic member, ensuring the use reliability of the pedal feel simulator 100, and ensuring the safety of a driver.

In a further embodiment of the present invention, the pedal feel simulator 100 further includes a pressure sensor 7 and a displacement detecting device 8, the pressure sensor 7 being provided between the push rod 6 and the piston 2 to detect the pressure between the push rod 6 and the piston 2, the displacement detecting device 8 being for detecting the displacement amount of the push rod 6. When the pedal feel simulator 100 is applied to a vehicle, when the vehicle needs braking, a driver depresses the pedal 102 to transmit a depression force of the driver to the piston 2 through the push rod 6, the first elastic member 51, and the first elastic member 51 applies an initial elastic force to the push rod 6 to provide a basic pedal reaction force; the pressure sensor 7 can detect the pressure between the push rod 6 and the piston 2, the pressure sensor 7 transmits the detection result to an Electronic Control Unit 101(Electronic Control Unit, ECU) of the vehicle, the displacement detection device 8 is used for detecting the displacement of the push rod 6, the displacement detection device 8 transmits the detection result to the Electronic Control Unit 101 of the vehicle, the Electronic Control Unit 101 can analyze the detection result, so as to calculate the optimal target pedal reaction force corresponding to the displacement, obtain the difference between the optimal target pedal reaction force and the pedal reaction force corresponding to the initial elastic force, at this time, the driving assembly is controlled to operate, the driving assembly drives the moving member 3 to reciprocate to adjust the deformation of the first elastic member 51 in real time, so that the adjusted first elastic member 51 can apply the adjusting elastic force to the push rod 6, and the adjusting elastic force is fed back to the driver through the piston 2, the push rod 6 and the pedal 102, and the pedal reaction force corresponding to the adjustment elastic force approaches the optimal target pedal reaction force to match the running state of the real vehicle, so that the pedal feeling effect when the driver steps on the pedal 102 is improved, and the operation comfort of the driver is improved. Therefore, the pressure sensor 7 and the displacement detection device 8 are arranged, so that the intelligent degree of the pedal feeling simulator 100 is improved, and the operation of a driver is facilitated.

In some optional embodiments of the present invention, the driving assembly comprises a driver 41, a planetary gear mechanism 42 and a central lead screw 43, the planetary gear mechanism 42 comprises a sun gear 421, planet gears 422, a planet carrier 423 and an outer ring gear 424, the planet gears 422 are respectively engaged with the sun gear 421 and the outer ring gear 424, the planet carrier 423 is arranged on the planet gears 422 and rotates synchronously with the planet gears 422, the driver 41 is matched with the sun gear 421 to drive the sun gear 421 to rotate, the central lead screw 43 is matched with the moving member 3 to convert the rotation of the central lead screw 43 into the movement of the moving member 3, and the central lead screw 43 is arranged on the planet carrier 423 to be driven by the planet carrier 423 to rotate. Therefore, the driver 41 is connected with the central lead screw 43 through the planetary gear mechanism 42, the planetary gear mechanism 42 reduces the speed and increases the torque of the driver 41 to be transmitted to the central lead screw 43, then the rotation of the central lead screw 43 is converted to the movement of the moving member 3, and the moving member 3 can be ensured to move in real time to adjust the deformation of the first elastic member 51, so that the pedal braking feeling of a driver is ensured, meanwhile, the planetary gear mechanism 42 is small in size, light in weight, compact in structure, large in transmission power and high in bearing capacity, the occupied space of a driving assembly is reduced, the weight of the pedal feeling simulator 100 is reduced, the arrangement of the pedal feeling simulator 100 is facilitated, and the operation reliability of the driving assembly is ensured.

For example, in the examples of fig. 1-4, 8 and 9, the driver 41 may be a motor, which may be of various types, provided that the requirements of use are met. One end of the driver 41 may be formed with a limiting protrusion 41a to facilitate limiting of the driver 41, and the other end of the driver 41 may be provided with an output shaft 41b, and the sun gear 421 is inserted through the output shaft 41b so that the output shaft 41b can drive the sun gear 421 to rotate. Outer ring gear 424 can be established outside sun gear 421, planet wheel 422 can be three, three planet wheel 422 can all be located between outer ring gear 424 and the sun gear 421 along the even interval setting of circumference of sun gear 421, every planet wheel 422 is equallyd divide and is meshed with sun gear 421 and outer ring gear 424 mutually to sun gear 421 rotates and can drive three planet wheel 422 and rotate, makes three planet wheel 422 rotate around sun gear 421. The planet carrier 423 may be substantially formed in a plate-shaped structure, the planet carrier 423 may be located on one axial side of the sun gear 421, the planet carrier 423 may be disposed coaxially with the sun gear 421, three mating shafts 423a are formed on one side of the planet carrier 423 facing the sun gear 421, each of the mating shafts 423a extends toward the sun gear 421 in the axial direction of the planetary gear mechanism, and the three mating shafts 423a are correspondingly disposed through the three planet gears 422 one to one, so that the three planet gears 422 may drive the planet carrier 423 to rotate around the central axis thereof when rotating around the sun gear 421. One end of the central screw 43 can be inserted through the planet carrier 423, the planet carrier 423 rotates to drive the central screw 43 to rotate, and the other end of the central screw 43 is matched with the moving member 3, so that the moving member 3 moves along the axial direction of the central screw 43 in the process of rotating around the central axis of the central screw 43, and the deformation amount of the first elastic member 51 can be adjusted in real time.

In some embodiments of the present invention, the housing 1 includes a main cylinder 11 and a mounting seat 12, one side of the main cylinder 11 is opened to form a mounting opening, the mounting seat 12 is provided at the mounting opening, the piston 2 is provided in the main cylinder 11, a first end 60a of the push rod 6 penetrates the mounting seat 12 to extend into the main cylinder 11 to be connected with the piston 2, and the push rod 6 is movably engaged with the mounting seat 12. For example, in the examples of fig. 1, 2, 5, 7-9, the main cylinder 11 may be formed in a substantially cylindrical structure, one axial side of the main cylinder 11 is open, the other axial side is closed, and the mounting portion is provided at the one axial side of the main cylinder 11, so that a closed accommodating space is defined between the main cylinder 11 and the mounting seat 12, so that dust, water, and the like cannot enter the accommodating space, and the effect of dust and water prevention of the pedal feel simulator 100 is achieved. The piston 2 is located in the accommodating space, the push rod 6 is arranged on the mounting seat 12 in a penetrating mode, so that the first end 60a of the push rod 6 penetrates through the mounting seat 12 to penetrate into the accommodating space to be connected with the piston 2, the mounting seat 12 can play a supporting and guiding role for the push rod 6, the pressure sensor 7 is located between the push rod 6 and the piston 2, one end of the pressure sensor 7 can be in threaded connection with the first end 60a of the push rod 6, the other end of the pressure sensor 7 can be abutted against the piston 2, one end of the pressure sensor 7 can be fixedly connected with the piston 2, the other end of the pressure sensor 7 can be abutted against the first end 60a of the push rod 6, or two ends of the pressure sensor 7 are respectively abutted against the first end 60a of the push rod 6 and the piston 2, or two ends of the pressure sensor 7 are respectively fixedly connected with the first end 60a of the push rod 6 and the piston 2.

Alternatively, the displacement detecting means 8 is provided on the main cylinder 11. For example, in the examples of fig. 1, 5 and 8, the main cylinder 11 is formed with a mounting hole, which may be disposed adjacent to the mounting seat 12, and the displacement detecting device 8 may be inserted into the mounting hole, thereby achieving the mounting of the displacement detecting device 8. It can be understood that the position of the displacement detection device 8 can be specifically set according to actual conditions, and only the displacement detection device 8 needs to be ensured to detect the displacement of the push rod 6. For example, the displacement detecting device 8 may be provided on the mount 12, but is not limited thereto.

In some embodiments of the present invention, the moving member 3 is disposed in the housing 1, an extending hole 111a is disposed on the end wall 111 of the housing 1, and one end of the central screw 43 passes through the extending hole 111a to be engaged with the planet carrier 423. For example, as shown in fig. 5 and 8, the moving member 3 may be disposed coaxially with the piston 2, and the moving member 3 may be disposed inside the piston 2. An end wall 111 of the end of the housing 1 far from the mounting seat 12 is formed with a protruding hole 111a, and the above-mentioned one end of the center screw 43 passes through the protruding hole 111a to be engaged with the planet carrier 423, so that the housing 1 can play a certain supporting role for the center screw 43, thereby reducing the burden of the planetary gear mechanism 42 and ensuring the service life of the planetary gear mechanism 42.

Specifically, as shown in fig. 7 and 8, the center screw 43 includes a center rod 431 and a ring-shaped boss 432, the center rod 431 extends in the axial direction of the drive assembly, one end of the center rod 431 is engaged with the carrier 423, the other end of the center rod 431 is engaged with the moving member 3, the boss 432 is provided on the outer peripheral wall of the center rod 431, and the boss 432 may be formed by a part of the outer peripheral wall of the center rod 431 protruding outward. The pedal feel simulator 100 further comprises a thrust bearing 9, the thrust bearing 9 is arranged in the shell 1, the thrust bearing 9 covers the central rod 431, the thrust bearing 9 is located between the boss 432 and the inner wall of the shell 1, two ends of the thrust bearing 9 are respectively abutted against the boss 432 and the inner wall of the shell 1, so that the central screw 43 can be separated from the inner wall of the shell 1 by the thrust bearing 9, meanwhile, the thrust bearing 9 can bear axial load, friction received by the central screw 43 can be reduced, and smooth rotation of the central screw 43 is guaranteed. Here, it should be noted that the direction "outer" refers to a direction away from the central axis of the drive assembly, and the opposite direction is defined as "inner".

In a further embodiment of the present invention, the pedal feel simulator 100 further includes a bushing 10a, and the bushing 10a is sleeved on a portion of the center screw 43 located in the extension hole 111 a. For example, as shown in fig. 5 and 8, the bush 10a is located between the outer peripheral wall of the central rod 431 and the wall surface of the protruding hole 111a, so that the bush 10a can further separate the central screw 43 from the housing 1, and at the same time, the bush 10a can bear a radial load, and friction received by the central screw 43 can be reduced, further ensuring smooth rotation of the central screw 43.

Further, the pedal feel simulator 100 further includes a retainer 10b, and the retainer 10b is externally fitted on a portion of the center screw 43 extending out of the housing 1. For example, as shown in fig. 5 and 8, the central rod 431 may be formed with a limiting groove, the limiting groove may be formed by partially recessing the outer peripheral wall of the central rod 431, the retainer 10b may be disposed in the limiting groove, and an axial end of the retainer 10b may abut against the end wall 111 of the housing 1, so that the retainer 10b may limit the axial movement of the central screw 43.

As shown in fig. 1 to 4 and 8, the pedal feel simulator 100 further includes a housing case 10c, the housing case 10c is disposed on the housing 1, and the housing case 10c is disposed adjacent to the end wall 111 of the housing 1, the driver 41 and the planetary gear mechanism 42 are respectively disposed in the housing case 10c, a limiting groove 10d is formed in the housing case 10c, the limiting groove 10d may be formed by recessing the inner wall of the housing case 10c in a direction away from the center of the housing case 10c, and the limiting groove 10d is adapted to a limiting protrusion 41a on the driver 41 to limit the driver 41, an outer ring gear 424 is disposed on the housing case 10c, and the outer ring gear 424 may be disposed in the housing case 10 c.

Alternatively, the outer ring gear 424 and the outer cover housing 10c are integrally formed, so that the outer ring gear 424 and the outer cover housing 10c are conveniently formed, and the forming efficiency is improved. It is understood that the outer ring gear 424 and the outer cover housing 10c may also be separately molded and the outer ring gear 424 fixedly mounted to the outer cover housing 10 c.

In some embodiments of the present invention, one end of the piston 2 is housed on the moving member 3 to be movably engaged with the moving member 3, and the first elastic member 51 is provided inside the piston 2. For example, as shown in fig. 7 and 8, the piston 2 may be formed in a substantially cylindrical structure, one axial end of the piston 2 is open, and the other axial end is closed, the moving member 3 may be disposed in the piston 2 to be movably engaged with the one axial end of the piston 2, at this time, a closed cavity is defined between the moving member 3 and the piston 2, the first elastic member 51 is disposed in the cavity, one end of the first elastic member 51 abuts against the moving member 3, and the other end of the first elastic member 51 abuts against the other axial end of the piston 2, so that the first elastic member 51 is limited to some extent, and the position of the first elastic member 51 is prevented from being changed. Wherein, a matching protrusion may be formed on the moving member 3, and the one end of the first elastic member 51 may be sleeved on the matching protrusion to further limit the first elastic member 51.

The vehicle according to the second aspect embodiment of the invention includes a vehicle body, a pedal 102, and a pedal feel simulator 100, wherein the pedal feel simulator 100 is the pedal feel simulator 100 for the vehicle according to the above-described first aspect embodiment of the invention. The vehicle may be an electric automobile, but is not limited thereto.

The vehicle body is provided with an electronic control unit 101, a pedal 102 is rotatably arranged on the vehicle body, a pedal feeling simulator 100 is arranged on the vehicle body, the second end 60b of the push rod 6 is connected with the pedal, and the pressure sensor 7, the displacement detection device 8 and the driver 41 are respectively connected with the electronic control unit 101.

Specifically, as shown in fig. 8 and 9, a support 103 may be formed on the vehicle body, and the pedal 102 may be rotatably provided on the support 103 by a support rotation shaft 103a, so that the pedal 102 may rotate about the support rotation shaft 103 a; the second end 60b of the push rod 6 may be coupled to the pedal 102 by a coupling assembly 104, wherein one end of the coupling assembly 104 may be threadably coupled to the push rod 6 and the other end of the coupling assembly 104 may be movably coupled to the pedal 102.

According to the vehicle provided by the embodiment of the invention, by adopting the pedal feel simulator 100, an electromechanical layout can be formed in the vehicle, hydraulic pipelines, vacuum boosting and the like do not need to be arranged, the arrangement is flexible, the arrangement of the whole structure of the vehicle is convenient, the quality of the vehicle is reduced, even if a drive-by-wire technology is adopted on the vehicle, namely, an operating mechanism and an executing mechanism of a vehicle braking system are not directly connected, by adopting the pedal feel simulator 100, the vehicle can simulate the pedal braking feel while finishing the acquisition of pedal 102 action information and sending the pedal 102 action information to a drive-by-wire system controller to realize corresponding functions, a driver can feel the same braking feel as that of a pedal with a traditional structure when stepping on the pedal, the braking effect of the braking system of the vehicle and the braking feel of the driver are improved, and the electric braking of the vehicle is realized. Wherein, the simulator is felt to footboard 100 can install under the floor of automobile body, and the simulator is felt to footboard 100 can not occupy the space in cockpit and engine compartment this moment, has further made things convenient for arranging of vehicle overall structure, has promoted the travelling comfort of vehicle.

Other configurations and operations of vehicles according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

A pedal feel simulator 100 for a vehicle according to an embodiment of the present invention will be described in detail in one specific embodiment with reference to fig. 1 to 10. It is to be understood that the following description is only exemplary, and not a specific limitation of the invention.

As shown in fig. 1 to 10, the pedal feel simulator 100 includes a housing 1, a piston 2, a moving member 3, a driving assembly, a first elastic member 51, a second elastic member 52, a push rod 6, a pressure sensor 7, a displacement detecting device 8, a thrust bearing 9, a bush 10a, a retainer 10b, and a cover case 10 c.

The housing 1 includes a main cylinder 11 and a mounting seat 12, the main cylinder 11 may be formed in a substantially cylindrical structure, one side of the main cylinder 11 is open and the other side is closed, and the mounting seat is provided at the above-mentioned one axial side of the main cylinder 11 such that a sealed accommodating space is defined between the main cylinder 11 and the mounting seat 12. One end of the main cylinder 11 is provided with a plurality of first connecting portions 112, connecting portions 102a are arranged at one end of the main cylinder 11, a first fixing member 100a is arranged on each first connecting portion 112, and the main cylinder 11 is fixedly connected with the mounting seat 12 through the first fixing member 100 a; the other end of the main cylinder 11 is provided with a plurality of second connecting portions 113, and a second fixing member 100b is inserted into each second connecting portion 113, and the main cylinder 11 is fixedly connected to the housing case 10c via the second fixing member 100b, wherein the second connecting portions 102a are each provided with a second fixing member 100 b. The outer peripheral wall of the mounting seat 12 is located outside the outer peripheral wall of the main cylinder 11, and a third fixing member 100c is inserted into the mounting seat 12, and the pedal feel simulator 100 is fixedly mounted to the vehicle body of the vehicle by the third fixing member 100 c. The first fixing member 100a, the second fixing member 100b, and the third fixing member 100c are all bolts.

The piston 2 is located in the accommodating space, the piston 2 looks like to move back and forth along the axial direction of the pedal feel simulator 100 relative to the housing 1, the piston 2 can be roughly formed into a cylindrical structure, one axial end of the piston 2 is open, and the other axial end is closed, the moving member 3 is arranged in the piston 2 to be in movable fit with the one axial end of the piston 2, a closed cavity is defined between the moving member 3 and the piston 2, the first elastic member 51 is located in the cavity, one end of the first elastic member 51 is sleeved outside a matching protrusion of the moving member 3 to be abutted against the moving member 3, and the other end of the first elastic member 51 is abutted against the other axial end of the piston 2, so that the moving member 3 can serve as a floating seat of the first elastic member, and the limitation of the first elastic member 51 is realized. A closed accommodating cavity is defined between the piston 2 and the main cylinder 11, the second elastic element 52 is located in the accommodating cavity so that the second elastic element 52 covers the piston 2, and two ends of the second elastic element 52 are respectively abutted against the outer wall of the piston 2 and the inner wall of the main cylinder 11. By adjusting the initial state of the first elastic member 51 and the second elastic member 52, the first elastic member 51 and the second elastic member 52 can give a certain preset force to the pedal, for example, when the driver does not step on the pedal 102 and the pedal feel simulator 100 is in the initial position, the first elastic member 51 is in the pre-compressed state and the second elastic member 52 is in the natural state.

A first end 60a of the push rod 6 is connected with the other axial end of the piston 2, a pressure sensor 7 is arranged between the push rod 6 and the piston 2 to detect the pressure between the push rod 6 and the piston 2, one end of the pressure sensor 7 is abutted against the piston 2, and the other end of the pressure sensor 7 is in threaded connection with the first end 60a of the push rod 6; the second end 60b of the push rod 6 penetrates through the mounting seat 12 and extends out of the housing 1 to be connected with the pedal 102, the second end 60b of the push rod 6 is connected with the pedal 102 through the connecting assembly 104, wherein the second end 60b of the push rod 6 is in threaded connection with the connecting assembly 104, the pedal is provided with a connecting portion 102a, the connecting assembly 104 is provided with a matching groove 104a, the connecting portion 102a is movably matched in the matching groove 104a, so that when a driver steps on the pedal 102, a stepping force can be transmitted to the push rod 6 through the connecting assembly 104 to move the push rod 6, and the displacement detection device 8 is arranged on the main cylinder 11 to detect the displacement of the push rod 6.

As shown in fig. 8, one end of the connecting assembly 104 adjacent to the mounting seat 12 is provided with a first stopping portion 104b, and the first stopping portion 104 is provided with an internal thread which is matched with the external thread of the second end 60b of the push rod 6 and is used for realizing the connection between the connecting assembly 104 and the push rod 6; one side of the mounting seat 12 adjacent to the connecting assembly 104 is provided with a second stopping portion 12a, so that the length of an inner hole of the mounting seat is prolonged, the mounting seat can play a good guiding role to realize smooth movement of the push rod 6, and the push rod 6 is prevented from being stuck to influence the braking of a vehicle.

The driving assembly comprises a driver 41, a planetary gear mechanism 42 and a central screw 43, the planetary gear mechanism 42 comprises a sun gear 421, three planet gears 422, a planet carrier 423 and an outer gear 424, each planet gear 422 is respectively meshed with the sun gear 421 and the outer gear 424, the planet carrier 423 is arranged on the planet gears 422, the three planet gears 422 can drive the planet carrier 423 to synchronously rotate around the central axis of the driving assembly, the driver 41 is provided with an output shaft 41b, the output shaft 41b is matched with the sun gear 421 to drive the sun gear 421 to rotate, one end of the central screw 43 penetrates through the end wall 111 of the shell 1 to be matched with the planet carrier 423, so that the planet carrier 423 can drive the central screw 43 to rotate, and the other end of the central screw 43 is matched with the moving member 3 to convert the rotation of the central screw 43 to the movement of the moving member 3. The moving member 3 may be a screw nut, the screw nut and the central screw 43 together form a screw assembly, and the screw assembly may be a sliding screw, a ball screw, a planetary roller screw, or the like; the driver 41 and the planetary gear mechanism 42 are each located inside the housing case 10c, and the outer ring gear 424 and the housing case 10c are integrally formed.

As shown in fig. 7 and 8, the center screw 43 includes a center rod 431 and a ring-shaped boss 432, the center rod 431 extends in the axial direction of the drive assembly, one end of the center rod 431 is engaged with the carrier 423, the other end of the center rod 431 is engaged with the moving member 3, the boss 432 is provided on the outer peripheral wall of the center rod 431, and the boss 432 may be formed by a part of the outer peripheral wall of the center rod 431 protruding outward. The thrust bearing 9 is arranged in the shell 1, the thrust bearing 9 is covered on the central rod 431, the thrust bearing 9 is positioned between the lug boss 432 and the inner wall of the shell 1, and two ends of the thrust bearing 9 are respectively butted against the lug boss 432 and the inner wall of the shell 1; the bush 10a is fitted over the portion of the center screw 43 within the projecting hole 111a to space the outer peripheral wall of the center rod 431 from the wall surface of the projecting hole 111a, the retainer ring 10b is fitted into the retainer groove on the portion of the center screw 43 projecting from the housing 1, and one axial end of the retainer ring 10b abuts against the end wall 111 of the housing 1.

The vehicle comprises a vehicle body, a pedal 102 and a pedal feel simulator 100, wherein the vehicle body is provided with an electronic control unit 101 which can be connected with a higher-level control system of the vehicle such as a wire control system, the pedal 102 is rotatably arranged on the vehicle body, the pedal feel simulator 100 is arranged on the vehicle body, the second end 60b of the push rod 6 is connected with the pedal, and the pressure sensor 7, the displacement detection device 8 and the driver 41 are respectively connected with the electronic control unit 101. As shown in fig. 8 and 9, a support 103 may be formed on the vehicle body, and the pedal 102 may be rotatably provided on the support 103 by a support rotation shaft 103a such that the pedal 102 may rotate about the support rotation shaft 103 a; the second end 60b of the push rod 6 may be coupled to the pedal 102 by a coupling assembly 104, wherein one end of the coupling assembly 104 may be threadably coupled to the push rod 6 and the other end of the coupling assembly 104 may be movably coupled to the pedal 102.

When the vehicle needs braking, the driver presses the pedal 102 to transmit the stepping force of the driver to the piston 2, the first elastic element 51 and the second elastic element 52 through the push rod 6, and the first elastic element 51 and the second elastic element 52 can apply initial elastic force to the push rod 6 to provide basic pedal counterforce so as to ensure the 'braking feeling' of the pedal 102 when the braking system of the vehicle works; the pressure sensor 7 can detect the pressure between the push rod 6 and the piston 2, the pressure sensor 7 transmits the detection result to an Electronic Control Unit 101(Electronic Control Unit, ECU) of the vehicle, the displacement detection device 8 is used for detecting the displacement of the push rod 6, the displacement detection device 8 transmits the detection result to the Electronic Control Unit 101 of the vehicle, the Electronic Control Unit 101 transmits the detection information to a drive-by-wire system of the vehicle for realizing the function, meanwhile, the Electronic Control Unit 101 also integrates the information from the drive-by-wire system, and the Electronic Control Unit 101 analyzes the detection result, so as to calculate the optimal target pedal reaction force corresponding to the displacement, obtain the difference between the optimal target pedal reaction force and the pedal reaction force corresponding to the initial elastic force, at this moment, the driving component is controlled to operate, the driving component drives the moving component 3 to reciprocate to adjust the deformation of the first elastic component 51 in real time, the adjusted first elastic part 51 can apply an adjusting elastic force to the push rod 6, the adjusting elastic force is fed back to a driver through the piston 2, the push rod 6 and the pedal 102, and a pedal counter force corresponding to the sum of the adjusting elastic force and the initial elastic force of the second elastic part 52 approaches to the optimal target pedal counter force to be matched with the running state of the real vehicle, so that the pedal feeling effect of the driver when the driver steps on the pedal 102 is improved, and the operation comfort of the driver is improved; meanwhile, the electronic control unit 101 may analyze a final braking scheme according to the optimal target pedal reaction force in combination with the running state of the real vehicle and the real-time road condition, and transmit a corresponding signal to the actuator to implement braking of the vehicle. When the vehicle is not braked, the driver releases the pedal 102, and the driving assembly drives the moving member 3 to move to change the elastic force of the first elastic member 51, and the piston 2 can move to the initial position under the elastic force of the first elastic member 51, so that the piston 2 pushes the pedal 102 to the initial position through the push rod 6.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pedal feel simulator for a vehicle, the vehicle including a pedal, comprising:

a housing;

a piston reciprocally disposed within the housing;

the moving piece is movably matched with one end of the piston and moves to directly drive the piston to move;

the driving assembly is matched with the moving piece to drive the moving piece to move in a reciprocating manner;

the two ends of the first elastic piece respectively abut against the piston and the moving piece;

the first end of the push rod is connected with the other end of the piston, and the second end of the push rod is suitable for being connected with the pedal;

a pressure sensor provided between the push rod and the piston to detect a pressure between the push rod and the piston; displacement detecting means for detecting a displacement amount of the push rod; an electronic control unit of the vehicle determines a difference value between an optimal target pedal reaction force and a pedal reaction force corresponding to the detection result of the pressure sensor according to the detection result of the displacement detection device, and controls the driving assembly to operate according to the difference value so as to adjust the pedal reaction force;

the drive assembly includes: a driver; the planetary gear mechanism comprises a sun gear, a planet carrier and an outer gear ring, the planet gear is respectively meshed with the sun gear and the outer gear ring, the planet carrier is arranged on the planet gear and synchronously rotates with the planet gear, and the driver is matched with the sun gear to drive the sun gear to rotate; the central screw rod is matched with the moving piece to convert the rotation of the central screw rod to the movement of the moving piece, and the central screw rod is arranged on the planet carrier to be driven by the planet carrier to rotate;

the moving piece is arranged in the shell, an extending hole is formed in the end wall of the shell, and one end of the central screw rod penetrates through the extending hole to be matched with the planet carrier;

the central screw comprises a central rod and an annular boss, the central rod is respectively matched with the planet carrier and the moving member, and the boss is arranged on the outer peripheral wall of the central rod; the pedal feel simulator also comprises a thrust bearing, the thrust bearing is arranged in the shell, and the thrust bearing is covered on the central rod and is positioned between the boss and the inner wall of the shell;

a bushing that is sleeved over a portion of the central lead screw that is within the protruding bore.

2. The pedal feel simulator for a vehicle according to claim 1, further comprising:

and the second elastic piece is covered on the piston, and two ends of the second elastic piece are respectively matched on the outer wall of the piston and the inner wall of the shell.

3. The pedal feel simulator for a vehicle of claim 1, wherein the housing includes a main cylinder open on one side to form a mounting opening, and a mounting seat provided at the mounting opening, the piston being provided within the main cylinder, the first end of the push rod extending through the mounting seat into the main cylinder to connect with the piston, the push rod being in moving engagement with the mounting seat.

4. The pedal feel simulator for a vehicle according to claim 3, wherein the displacement detecting means is provided on the main cylinder.

5. The pedal feel simulator for a vehicle of claim 1 further comprising a retainer ring that is sleeved over a portion of the central lead screw that extends out of the housing.

6. The pedal feel simulator for a vehicle according to claim 1, further comprising a housing case provided on the housing, the driver and the planetary gear mechanism being provided in the housing case, respectively, the outer ring gear being provided on the housing case.

7. The pedal feel simulator for a vehicle according to claim 6, wherein the outer ring gear and the outer cover housing are an integrally formed piece.

8. The pedal feel simulator for a vehicle according to any one of claims 1 to 7, wherein one end of the piston is housed on the moving member to be movably engaged with the moving member, the first elastic member being provided in the piston.

9. A vehicle, characterized by comprising:

the vehicle body is provided with an electronic control unit;

the pedal is rotatably arranged on the vehicle body;

the pedal feeling simulator is arranged on the vehicle body and is according to any one of claims 1-8, the second end of the push rod is connected with the pedal, and the pressure sensor, the displacement detection device and the driver are respectively connected with the electronic control unit.

10. The vehicle of claim 9, wherein the push rod is coupled to the pedal by a coupling assembly, and wherein the push rod has an outer peripheral wall provided with an external thread that threadably engages the coupling assembly.