CN110027531B - Pedal feel simulator for vehicle and vehicle with same - Google Patents

Pedal feel simulator for vehicle and vehicle with same Download PDF

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Publication number
CN110027531B
CN110027531B CN201810030775.1A CN201810030775A CN110027531B CN 110027531 B CN110027531 B CN 110027531B CN 201810030775 A CN201810030775 A CN 201810030775A CN 110027531 B CN110027531 B CN 110027531B
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China
Prior art keywords
motor
pedal
push rod
motor push
vehicle
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CN201810030775.1A
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Chinese (zh)
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CN110027531A (en
Inventor
滕俊辉
莫永才
王铁君
李传博
刘苏丽
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BYD Co Ltd
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BYD Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/06—Disposition of pedal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
    • B60T8/4081—Systems with stroke simulating devices for driver input
    • B60T8/409—Systems with stroke simulating devices for driver input characterised by details of the stroke simulating device

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Elements And Transmission Devices (AREA)
  • Mechanical Control Devices (AREA)
  • Regulating Braking Force (AREA)

Abstract

The invention discloses a pedal feel simulator for a vehicle and the vehicle with the same, wherein the vehicle comprises a pedal, and the pedal feel simulator comprises: a housing; the linear motor comprises a motor primary, a motor secondary and a motor push rod, the motor primary is fixed on the inner wall of the shell, the motor secondary is arranged in the motor primary, the motor secondary is matched with the motor primary so that the motor secondary can axially move relative to the motor primary, the motor secondary is sleeved on the motor push rod to drive the motor push rod to synchronously move, and the first end of the motor push rod extends out of the shell so as to be suitable for being connected with the pedal; and the elastic piece is used for applying elastic force to the motor push rod. 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 high response speed, has a good braking effect, and 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; the linear motor comprises a motor primary, a motor secondary and a motor push rod, the motor primary is fixed on the inner wall of the shell, the motor secondary is arranged in the motor primary, the motor secondary is matched with the motor primary to enable the motor secondary to move axially relative to the motor primary, the motor secondary is sleeved on the motor push rod to drive the motor push rod to move synchronously, and the first end of the motor push rod extends out of the shell to be suitable for being connected with the pedal; and the elastic piece is used for applying elastic force to the motor push rod.
According to the pedal feel simulator for the vehicle provided by the embodiment of the invention, the linear motor and the elastic member are arranged, the elastic member can apply elastic force to the motor push rod to provide basic pedal reaction force, the motor secondary can apply acting force to the motor push rod to provide compensating force, so that the pedal feel simulator can provide optimal target pedal reaction force to the pedal, the optimal target pedal reaction force, pedal brake force and the running state of the real vehicle are matched with each other, and further when the pedal feel simulator is applied to the vehicle, the brake signal can be transmitted by adopting an electric signal, the signal transmission is rapid, the brake response is rapid, the response is sensitive, good brake feeling, particularly the pedal brake feeling can be provided for a driver, the brake feeling is more consistent with the human body feeling, 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; by setting the elastic characteristic line of the elastic element, the elastic characteristic line of the elastic element is closer to a pedal target curve, namely the elastic force of the elastic element is closer to the optimal target pedal counter force, so that the design requirement is more easily met, the load of a linear motor is reduced, the brake feeling of the pedal can be regulated and controlled, for example, the optimal target pedal counter force can be changed, different requirements of different drivers on the brake feeling are met, 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 elastic member is disposed in the housing and two ends of the elastic member respectively abut against an inner wall of the housing and a second end of the motor push rod.
According to some embodiments of the invention, the inner wall of the housing is provided with a first mounting protrusion, and one end of the elastic member is sleeved and fixed on the first mounting protrusion.
According to some embodiments of the present invention, the second end of the motor push rod is provided with a second mounting protrusion, and the other end of the elastic member is sleeved and fixed on the second mounting protrusion.
According to some embodiments of the invention, the pedal feel simulator further comprises a link assembly with adjustable length, and two ends of the link assembly are respectively connected with the first end of the motor push rod and the pedal.
According to some embodiments of the invention, the connecting rod assembly comprises: a first end of the first connecting rod is connected with a first end of the motor push rod, and a second end of the first connecting rod is provided with an external thread; a first end of the second connecting rod is sleeved on the first connecting rod and is in threaded fit with the external thread, and a second end of the second connecting rod is suitable for being connected with the pedal; and the adjusting nut is sleeved on the first connecting rod and is in threaded fit with the external thread.
According to some embodiments of the present invention, a first end of the motor push rod is provided with a fitting groove, an inner wall of the fitting groove is provided with a spherical surface, one end of the link assembly is formed as a spherical fitting portion, the spherical fitting portion extends into the fitting groove and contacts with the spherical surface, and the motor push rod is provided with a positioning member for positioning the spherical fitting portion in the spherical surface.
According to some embodiments of the present invention, the positioning member is disposed in the fitting groove and sleeved on the connecting rod assembly, and the positioning member respectively abuts against an outer peripheral wall of the spherical fitting portion and an inner wall of the fitting groove.
According to some embodiments of the invention, the housing comprises: the motor primary is fixed on the inner wall of the main cylinder body; the bottom cover is arranged on the main cylinder body to close one side opening of the main cylinder body, and the elastic piece is stopped against the bottom cover; the fixed plate is arranged on the main cylinder body to close the opening on the other side of the main cylinder body, and the first end of the motor push rod penetrates out of the fixed plate.
According to some embodiments of the invention, the outer peripheral wall of the fixing plate is located outside the outer peripheral wall of the main cylinder.
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 the pedal feel simulator according to the embodiment of the first aspect of the invention, the shell is arranged on the vehicle body, the first end of the motor push rod is connected with the pedal, and the linear motor is connected with the electronic control unit; the displacement detection device is used for detecting the displacement of the motor push rod and is connected with the electronic control unit; and the pressure detection device is used for detecting the bearing pressure of the first end of the motor push rod and is 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 and the like do not need to be arranged, the layout is flexible, the overall structure of the vehicle is convenient to arrange, the quality of the vehicle is reduced, the braking effect of a braking system of the vehicle and the braking feel of a 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 diagram of a pedal feel simulator according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of the pedal feel simulator shown in FIG. 1;
FIG. 3 is an enlarged view of portion A circled in FIG. 2;
FIG. 4 is an enlarged view of the portion B circled in FIG. 2;
FIG. 5 is a schematic view of the assembly between the pedal feel simulator and the pedal shown in FIG. 1;
FIG. 6 is an enlarged view of the circled portion C of FIG. 5;
FIG. 7 is an exploded view of the pedal feel simulator shown in FIG. 5;
FIG. 8 is a schematic view of the assembly between the pedal feel simulator and the pedal according to another embodiment of the present invention;
fig. 9 is a schematic view of an assembly between a pedal feel simulator and a pedal according to yet another embodiment of the present invention.
Reference numerals:
a pedal feeling simulator 100, a pedal 101, a stopper 101a, a stopper 101b, a roller shaft 101c, a spring,
A support 102, a support rotating shaft 102a,
A housing 1, a bracket 10, a bracket rotating shaft 10a, a first fixing piece 10a, a second fixing piece 10b, a third fixing piece 10c, a main cylinder 11, a first connecting part 111, a bottom cover 12, a bottom cover sealing ring 120, a first accommodating groove 12a,
A first mounting protrusion 121, a second connecting portion 122, a third mounting protrusion 123,
A fixed plate 13, a fixed plate packing 130, a second receiving groove 13a,
The linear motor 2, the motor primary 21, the motor secondary 22, the motor push rod 23, the positioning piece 230,
A first end 23a of the motor push rod, a second end 23b of the motor push rod, a matching groove 231, a spherical surface 231a,
A second mounting projection 232, an escape groove 232a, a mounting screw 232b, a stopper 233,
An elastic member 3, a first elastic member 31, a second elastic member 32,
A connecting rod assembly 4, a spherical matching part 40, a connecting rod rotating shaft 40a,
A first connecting rod 41, a first end 41a of the first connecting rod, a second end 41b of the first connecting rod, external threads 411,
A second connecting rod 42, a first end 42a of the second connecting rod, a second end 42b of the second connecting rod,
Connecting portion 421, threaded portion 422, adjusting nut 43.
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," "lateral," "length," "upper," "lower," "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, and 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 first aspect of the invention will be described below with reference to fig. 1 to 9.
As shown in fig. 1 to 9, a pedal feel simulator 100 for a vehicle according to an embodiment of the present invention includes a pedal 101, and the pedal feel simulator 100 includes a housing 1, a linear motor 2, and an elastic member 3.
The linear motor 2 comprises a motor primary 21, a motor secondary 22 and a motor push rod 23, wherein the motor primary 21 is fixed on the inner wall of the shell 1, the motor secondary 22 is arranged in the motor primary 21, the motor secondary 22 is matched with the motor primary 21 to enable the motor secondary 22 to move axially relative to the motor primary 21, the motor secondary 22 is sleeved on the motor push rod 23 to drive the motor push rod 23 to move synchronously, and a first end 23a of the motor push rod extends out of the shell 1 to be suitable for being connected with the pedal 101. The elastic member 3 serves to apply an elastic force to the motor push rod 23.
For example, as shown in fig. 1 to 9, the housing 1 may be formed substantially in a cylindrical structure and an accommodating space may be defined in the housing 1, the motor primary 21 and the motor secondary 22 may be both located in the accommodating space, the motor primary 21 is fixed on the housing 1 to support the housing 1, further ensuring the strength and stability of the housing 1, and the motor push rod 23 may be inserted through the housing 1 such that a portion of the motor push rod 23 is located in the accommodating space and another portion of the motor push rod 23 is located outside the accommodating space.
The motor primary 21 and the motor secondary 22 may both form an annular structure, the motor push rod 23, the motor secondary 22 and the motor primary 21 may be sequentially arranged from inside to outside, that is, the motor secondary 22 is sleeved outside the motor push rod 23, and the motor primary 21 is sleeved outside the motor secondary 22, wherein the motor secondary 22 may be fixed on the motor push rod 23, and the motor primary 21 and the motor secondary 22 are arranged at intervals inside and outside, and the motor primary 21 and the motor secondary 22 interact with each other to enable the motor secondary 22 to move relative to the motor primary 21 along the axial direction of the linear motor 2, so that the motor secondary 22 may drive the motor push rod 23 to move synchronously. The linear motor 2 has the advantages of compact structure, low power loss, high reaction speed, accurate positioning, low noise, long service life and the like.
When the vehicle needs to be braked and the motor push rod 23 moves along the axial direction of the linear motor 2, the motor push rod 23 can compress the elastic member 3, so that the elastic member 3 can apply elastic force to the motor push rod 23, and the first end 23a of the motor push rod is connected with the pedal 101, so that the elastic member 3 can provide basic pedal reaction force.
When the pedal feel simulator 101 is applied to a vehicle, when the vehicle needs to be braked, a driver presses down on the pedal to transmit the stepping force of the driver to the linear motor 2 and the elastic member 3 through the motor push rod 23, and the elastic member 3 can apply elastic force to the motor push rod 23 to provide basic pedal reaction force, so that the 'brake feel' of the pedal when a brake system works is ensured; the detection device on the vehicle, for example, the sensor, may detect parameters such as the magnitude of the pedaling force, the moving displacement of the motor push rod 23 or the motor secondary 22, the moving speed of the motor push rod 23 or the motor secondary 22, and transmit the detection result to an Electronic Control Unit (ECU) of the vehicle to analyze the detection result, so as to calculate an optimal target pedal reaction force and a compensation force that the linear motor 2 needs to provide, where the compensation force that the linear motor 2 needs to provide may be a difference between the optimal target pedal reaction force and the base pedal reaction force, and at this time, the Electronic Control Unit transmits the optimization result to the linear motor 2, and the linear motor 2 receives signals to enable the motor primary 21 and the motor secondary 22 to interact with each other, so that the motor secondary 22 can apply a corresponding compensation force to the motor push rod 23, and the sum of the base pedal reaction force and the compensation force to form the optimal target pedal reaction force, the optimal target pedal reaction force acts on the motor push rod 23 to be matched with the running state of the real vehicle, so that the pedal feeling effect of a driver when stepping on the pedal can be improved, and the operation comfort of the driver can be improved; meanwhile, the electronic control unit can analyze and obtain a final braking scheme according to the optimal target pedal reaction force and by combining the running state, the real-time road condition and the like of the real vehicle, and transmits corresponding signals to the actuating mechanism to realize the braking of the vehicle.
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 linear motor 2 and the elastic member 3, the elastic member 3 can apply an elastic force to the motor push rod 23 to provide a basic pedal reaction force, the motor secondary 22 can apply an acting force to the motor push rod 23 to provide a compensation force, so that the pedal feel simulator 100 can provide an optimal target pedal reaction force to the pedal 101, thereby the optimal target pedal reaction force, pedal brake force and the running state of the real vehicle are matched with each other, and further when the pedal feel simulator 100 is applied to the vehicle, an electric signal can be used for transmitting a brake signal, the signal transmission is rapid, the brake response is rapid, the response is sensitive, and a good brake feel, especially a pedal brake feel, can be provided for a driver, so that the brake feel is more in line with the human body, thereby improving the brake effect of the brake system of the vehicle (for example, the brake response time is shortened, and the brake effect is improved, More rational braking force) and driver's braking feel; by setting the elastic characteristic line of the elastic element 3, the elastic characteristic line of the elastic element 3 is closer to a pedal target curve, namely the elastic force of the elastic element is closer to the optimal target pedal counter force, so that the design requirement is more easily met, the burden of the linear motor 2 is reduced, and the regulation and control of the pedal braking feeling can be realized, for example, the optimal target pedal counter force can be changed, so that different requirements of different drivers on the braking feeling are met, and the regulation and control are convenient; the pedal feel simulator 100 has strong integrity, can realize modular design, and is convenient to produce, transport, install and use.
In some alternative embodiments of the present invention, the elastic member 3 is disposed in the housing 1, and two ends of the elastic member 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod. For example, in the example of fig. 1-7, the elastic member 3 is one, and both ends of the elastic member 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, when the vehicle needs to be braked and the motor push rod 23 moves along the axial direction of the linear motor 2, the axial distance between the second end 23b of the motor push rod and the inner wall of the housing 1 changes, and the elastic member 3 applies an elastic force to the motor push rod 23 to provide a basic pedal reaction force, so that the structure is simple and easy to implement.
For another example, in the example of fig. 8, there are two elastic members 3, two elastic members 3 are located on the same axial side of the motor primary 21, each elastic member 3 is located between the second end 23b of the motor push rod and the bottom wall of the housing 1, and two ends of each elastic member 3 are respectively matched with the second end 23b of the motor push rod and the inner wall of the housing 1, so that when the motor push rod 23 moves along the axial direction of the linear motor 2 when the vehicle needs to be braked, the axial distance between the second end 23b of the motor push rod and the inner wall of the housing 1 changes, and at least one of the two elastic members 3 can apply an elastic force to the motor push rod 23 to provide a basic pedal reaction force. From this, through setting up elastic component 3 to two, the variety of the 3 elastic characteristic line of elastic component has been promoted, further make elastic component 3's elastic characteristic line more be close optimum target footboard counter-force, the burden of linear electric motor 2 has further been reduced, and when any one of them elastic component 3 broke down in two elastic component 3, another elastic component 3 can continue to provide the elastic force in order to guarantee the normal operating of footboard sense simulator 100, the factor of safety of elastic component 3 has been promoted, the reliability in utilization of footboard sense simulator 100 has been guaranteed, driver's safety has been guaranteed. Here, it should be noted that "fitting" may refer to indirect fitting or direct fitting, for example, "both ends of the elastic member 3 are respectively fitted with the inner wall of the housing 1 and the second end 23b of the motor push rod" may be that both ends of the elastic member 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, or one end of the elastic member 3 abuts against one of the inner wall of the housing 1 and the second end 23b of the motor push rod, and the other end of the elastic member 3 is spaced from the other of the inner wall of the housing 1 and the second end 23b of the motor push rod.
Specifically, as shown in fig. 8, both ends of each of the two elastic members 3 are respectively engaged with the inner wall of the housing 1 and the second end 23b of the motor push rod, when the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, both ends of at least one of the two elastic members 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, so that when the driver steps on the pedal 101, at least one elastic member 3 can apply an elastic force to the motor push rod 23 to provide a basic pedal reaction force. For example, when the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, two ends of one of the two elastic members 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, one end of the other of the two elastic members 3 may abut against one of the inner wall of the housing 1 and the second end 23b of the motor push rod, and the other end may be spaced from the other of the inner wall of the housing 1 and the second end 23b of the motor push rod, when the driver starts to step on the pedal 101 to move the motor push rod 23 along the axial direction of the linear motor 2, the one of the two elastic members 3 applies an elastic force to the motor push rod 23, and when the motor push rod 23 moves to such a position that the two ends of the other of the two elastic members 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, the two elastic members 3 start to work simultaneously, While applying an elastic force to the motor push rod 23. For another example, when the driver does not step on the pedal 101 and the pedal feel simulator 100 is at the initial position, two ends of each of the two elastic members 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, the driver starts to step on the pedal 101 to move the motor push rod 23 along the axial direction of the linear motor 2, and the two elastic members 3 simultaneously start to work and simultaneously apply an elastic force to the motor push rod 23.
When the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, the states of the two elastic members 3 can be set according to actual requirements. For example, both elastic members 3 may be in a natural state (neither elastic member 3 is pre-compressed), or both elastic members 3 may be in a pre-compressed state, or one of the two elastic members 3 may be in a pre-compressed state and the other in a natural state.
Specifically, when the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, both the two elastic members 3 are in the natural state, and at this time, both ends of at least one of the two elastic members 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod; when the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, the two elastic members 3 are both in the pre-compression state, and at this time, two ends of each of the two elastic members 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod; when the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, one of the two elastic members 3 is in the pre-compression state and the other one is in the natural state, both ends of the above-mentioned one of the two elastic members 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, at this time, both ends of the above-mentioned other one of the two elastic members 3 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, or one end of the above-mentioned other one of the two elastic members 3 respectively abut against one of the inner wall of the housing 1 and the second end 23b of the motor push rod, and the other end may be spaced from the other one of the inner wall of the housing 1 and the second end 23b of the motor push rod. But is not limited thereto.
In other alternative embodiments of the present invention, as shown in fig. 9, there are two elastic members 3, the two elastic members 3 are respectively located at two axial sides of the motor primary 21, two ends of one of the two elastic members 3 are respectively matched with the inner wall of the housing 1 and the second end 23b of the motor push rod, two ends of the other of the two elastic members 3 are respectively matched with the motor push rod 23 and the motor primary 21, so that when the vehicle needs to be braked and the motor push rod 23 moves along the axial direction of the linear motor 2, the axial distance between the second end 23b of the motor push rod and the inner wall of the housing 1 changes, and the axial distance between the motor push rod 23 and the motor primary 21 also changes, at least one of the two elastic members 3 can apply an elastic force to the motor push rod 23 to provide a basic reaction force to the motor pedal. Therefore, the diversity of the elastic characteristic lines of the elastic members 3 is improved by setting the two elastic members 3, the elastic characteristic lines of the elastic members 3 are further closer to the optimal target pedal reaction force, the burden of the linear motor 2 is further reduced, and when any one elastic member 3 of the two elastic members 3 breaks down, the other elastic member 3 can continue to provide the elastic force to ensure the normal operation of the pedal feeling simulator 100, the safety coefficient of the elastic members 3 is improved, the use reliability of the pedal feeling simulator 100 is ensured, and the safety of a driver is ensured; through establishing two elastic component 3 respectively in the axial both sides of motor primary 21, realized the interval setting of two elastic component 3 for mutual noninterference, mutual independence work between two elastic component 3. But is not limited thereto.
Specifically, as shown in fig. 9, the two elastic members 3 are a first elastic member 31 and a second elastic member 32, respectively, two ends of the first elastic member 31 are respectively engaged with the inner wall of the housing 1 and the second end 23b of the motor push rod, two ends of the second elastic member 32 are respectively engaged with the motor push rod 23 and the motor primary 21, when the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, two ends of the first elastic member 31 are respectively abutted against the inner wall of the housing 1 and the second end 23b of the motor push rod, and two ends of the second elastic member 32 are respectively abutted against the motor push rod 23 and the motor primary 21, or two ends of the first elastic member 31 are respectively abutted against the inner wall of the housing 1 and the second end 23b of the motor push rod, and one end of the second elastic member 32 is abutted against one of the motor push rod 23 and the motor primary 21, and the other end is spaced from the other of the motor push rod 23 and the motor primary 21, but is not limited thereto. For example, when the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, the two ends of the first elastic member 31 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, and the two ends of the second elastic member 32 respectively abut against the motor push rod 23 and the motor primary 21, the driver starts to step on the pedal 101 to move the motor push rod 23 in the axial direction of the linear motor 2, and the first elastic member 31 and the second elastic member 32 simultaneously start to operate and apply an elastic force to the motor push rod 23. For another example, when the driver does not step on the pedal 101 and the pedal feel simulator 100 is at the initial position, two ends of the first elastic member 31 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, one end of the second elastic member 32 abuts against one of the motor push rod 23 and the motor primary 21, and the other end of the second elastic member 32 is spaced from the other one of the motor push rod 23 and the motor primary 21, the driver starts to step on the pedal 101 to move the motor push rod 23 along the axial direction of the linear motor 2, the first elastic member 31 applies an elastic force to the motor push rod 23, when the motor push rod 23 moves to make two ends of the second elastic member 32 respectively abut against the motor push rod 23 and the motor primary 21, the second elastic member 32 starts to operate, and at the same time, the first elastic member 31 and the second elastic member 32 simultaneously apply an elastic force to the motor push rod 23.
When the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, the states of the first elastic member 31 and the second elastic member 32 can be set according to actual requirements. For example, the first elastic member 31 and the second elastic member 32 may be both in a natural state (neither the first elastic member 31 nor the second elastic member 32 is pre-compressed), or the first elastic member 31 and the second elastic member 32 may be both in a pre-compressed state, or one of the first elastic member 31 and the second elastic member 32 may be in a pre-compressed state and the other may be in a natural state.
Specifically, when the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, the first elastic member 31 and the second elastic member 32 are both in the natural state, and at this time, both ends of at least one of the first elastic member 31 and the second elastic member 32 respectively abut against the components of the pedal feel simulator 100, for example, both ends of the first elastic member 31 respectively abut against the inner wall of the housing 1 and the second end 23b of the motor push rod, and both ends of the second elastic member 32 respectively abut against the motor push rod 23 and the motor primary 21; when the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, the first elastic member 31 and the second elastic member 32 are both in the pre-compression state, at this time, two ends of the first elastic member 31 respectively abut against the components of the pedal feel simulator 100, and two ends of the second elastic member 32 respectively abut against the components of the pedal feel simulator 100; when the driver does not step on the pedal 101 and the pedal feel simulator 100 is in the initial position, one of the first elastic member 31 and the second elastic member 32 is in the pre-compressed state and the other is in the natural state, and both ends of at least one of the first elastic member 31 and the second elastic member 32 respectively abut against the components of the pedal feel simulator 100. But is not limited thereto.
It can be understood that the number of the elastic members 3 and the specific positions of the elastic members 3 may be specifically set according to the actual situation, but not limited thereto, and it is only required to ensure that the elastic members 3 can apply an elastic force to the motor push rod 23 to provide a basic pedal reaction force when the vehicle needs to be braked. For example, the number of the elastic members 3 may be three or more.
In some embodiments of the present invention, the inner wall of the housing 1 is provided with a first mounting protrusion 121, and one end of the elastic member 3 is sleeved and fixed on the first mounting protrusion 121. For example, as shown in fig. 2, 5, 8 and 9, the first mounting protrusion 121 may be disposed on the bottom wall of the housing 1, and the first mounting protrusion 121 may be formed by a portion of the bottom wall protruding toward a direction close to the motor push rod 23, and an end of the elastic member 3 adjacent to the first mounting protrusion 121 is sleeved outside the first mounting protrusion 121, at this time, the one end of the elastic member 3 may be adapted to an outer peripheral wall of the first mounting protrusion 121, so that the first mounting protrusion 121 may position the elastic member 3, and it is avoided that the elastic member 3 cannot provide elastic force better due to a position change of the elastic member 3, thereby further ensuring a pedal braking feeling.
Further, the second end 23b of the motor push rod is provided with a second mounting protrusion 232, and the other end of the elastic member 3 is sleeved and fixed on the second mounting protrusion 232. For example, in the example of fig. 2, 5, 8 and 9, the second mounting protrusion 232 extends toward the first mounting protrusion 121, the second mounting protrusion 232 may be coaxially disposed with the first mounting protrusion 121, an end of the elastic member 3 away from the first mounting protrusion 121 is sleeved outside the second mounting protrusion 232, and the other end of the elastic member 3 may be fitted with an outer peripheral wall of the second mounting protrusion 232, so that the second mounting protrusion 232 may further position the elastic member 3.
Wherein, the cross-sectional area of the first mounting protrusion 121 may gradually increase from top to bottom, and the cross-sectional area of the second mounting protrusion 232 may gradually increase from bottom to top, thereby facilitating the mounting of the elastic member 3. For example, the first and second mounting protrusions 121 and 232 may be formed in a circular truncated cone shape. It is understood that the cross-sectional area of the first mounting protrusion 121 may also be constant from top to bottom, and the cross-sectional area of the second mounting protrusion 232 may also be constant from top to bottom, but is not limited thereto. For example, in the examples of fig. 2, 5 and 9, the first mounting protrusion 121 and the second mounting protrusion 232 may each have a groove formed thereon, so as to reduce the material consumption of the first mounting protrusion 121 and the second mounting protrusion 232 and reduce the cost while ensuring the positioning effect of the first mounting protrusion 121 and the second mounting protrusion 232 on the elastic member 3. It is understood that the elastic member 3 may be a spring, but is not limited thereto. When the elastic member 3 is a spring, the spring may be a linear spring, a nonlinear spring, or the like, and the inner diameter of the spring may be constant along the axial direction of the spring, or may gradually increase or decrease along the axial direction of the spring, for example, the spring may be a cylindrical spring, a conical spring, or the like, and the stiffness coefficients of the springs may be the same or different.
In addition, when the pedal feel simulator 100 is applied to a vehicle, the pedal feel simulator 100 is in an initial position when the driver does not step on the pedal 101, and the state of the elastic member 31 and the time when the operation is started can be set according to actual requirements. For example, when the number of the elastic members 3 is one, the elastic members 3 may be in a pre-compressed state or a natural state (i.e., the elastic members 3 are not pre-compressed) when the pedal feel simulator 100 is in the initial position. When there are two elastic members 3, and the pedal feel simulator 100 is in the initial position, both the two elastic members 3 are in the pre-compression state, that is, both the two elastic members 3 are in the compression state to generate acting force on the motor push rod 23; when the driver steps on the pedal 101, the two elastic members 3 operate simultaneously. Or, when the pedal feel simulator 100 is in the initial position, one of the two elastic members 3 is in the pre-compressed state, and the other of the two elastic members 3 is in the natural state, at this time, only one of the two elastic members 3 generates an acting force on the motor push rod 23, and the other of the two elastic members 3 may abut against the components of the pedal feel simulator 100 or may be disposed at intervals, for example, the other of the two elastic members 3 may abut against the second end 23b of the motor push rod or may be disposed at intervals; when the pedal feel simulator 100 is in the initial position and the other of the two elastic members 3 abuts against the component of the pedal feel simulator 100, the driver steps on the pedal 101, and the displacement of the pedal 101 is greater than zero, the two elastic members 3 operate simultaneously, or when the pedal feel simulator 100 is in the initial position and the other of the two elastic members 3 is spaced from the component of the pedal feel simulator 100, the displacement of the pedal 101 reaches its set value, or the displacement of the motor push rod 23 reaches its set value, the two elastic members 3 start to operate simultaneously, and the displacement of the pedal 101 does not reach its set value, or the displacement of the motor push rod 23 does not reach its set value, only one elastic member 3 operates. But is not limited thereto.
In a further embodiment of the present invention, the pedal feel simulator 100 further comprises a linkage assembly 4 with adjustable length, and two ends of the linkage assembly 4 are respectively connected with the first end 23a of the motor push rod and the pedal 101. For example, in the example of fig. 5-7, the link assembly 4 may extend in the left-right direction, the left end (e.g., the left end in fig. 5) of the link assembly 4 is connected to the first end 23a of the motor push rod, the right end (e.g., the right end in fig. 5) of the link assembly 4 is connected to the pedal 101, and the axial distance between the pedal 101 and the first end 23a of the motor push rod may be adjusted by adjusting the length of the link assembly 4, so that the pedal 101 moves by the same displacement amount, and the deformation amount of the elastic member 3 is different due to the different lengths of the link assembly 4, so that the elastic force applied by the elastic member 3 to the motor push rod 23 is different, and different requirements of different drivers for the pedal braking feeling are met.
In some embodiments of the present invention, as shown in fig. 1 and 5, the link assembly 4 includes a first connecting rod 41, a second connecting rod 42 and an adjusting nut 43, a first end 41a of the first connecting rod is connected to the first end 23a of the motor push rod, a second end 41b of the first connecting rod is provided with an external thread 411, a first end 42a of the second connecting rod is sleeved on the first connecting rod 41, the first end 42a of the second connecting rod is in threaded fit with the external thread 411, a second end 42b of the second connecting rod is adapted to be connected to the pedal 101, the adjusting nut 43 is sleeved on the first connecting rod 41, the adjusting nut 43 is in threaded fit with the external thread 411, the adjusting nut 43 can be disposed closely to the first end 42a of the second connecting rod, so that the position of the second connecting rod 42 can be fixed when the adjusting nut 43 is tightened, so that the position of the second connecting rod 42 relative to the first connecting rod 41, the length of the connecting-rod assembly 4 remains unchanged at this time; when the adjusting nut 43 is loosened, the first end 42a of the second connecting rod is in threaded fit with the external thread 411 to adjust the position of the second connecting rod 42 relative to the first connecting rod 41, so as to adjust the length of the connecting rod assembly 4, and the structure is simple and easy to implement.
Specifically, as shown in fig. 1, the second connecting rod 42 may include two connecting portions 421 spaced apart from each other and a threaded portion 422 connected between one ends of the two connecting portions 421, the two connecting portions 421 are connected to the pedal 101, the threaded portion 422 is located at the first end 42a of the second connecting rod, and an internal thread adapted to the external thread 411 is formed on the threaded portion 422, so that the first end 42a of the second connecting rod is threadedly engaged with the external thread 411. It will be appreciated that the axial length of the external thread 411 may be specifically set as the case may be.
In some alternative embodiments of the present invention, the first end 23a of the motor push rod is provided with a fitting recess 231, the inner wall of the fitting recess 231 is provided with a spherical surface 231a, one end of the link assembly 4 is formed as a spherical fitting portion 40, the spherical fitting portion 40 extends into the fitting recess 231 and the spherical fitting portion 40 contacts the spherical surface 231a, and the motor push rod 23 is provided with a positioning member 230 for positioning the spherical fitting portion 40 in the spherical surface 231 a. For example, in the example of fig. 2, 3, 5 and 6, the fitting groove 231 may be formed by a portion of an end surface of the first end 23a of the motor push rod being recessed toward a direction close to the second end 23b of the motor push rod, the spherical surface 231a may be formed by a portion of an inner wall of the fitting groove 231 being recessed toward the direction close to the second end 23b of the motor push rod, the spherical fitting portion 40 is located at an end of the link assembly 4 connected to the first end 23a of the motor push rod and the spherical fitting portion 40 is fitted to the spherical surface 231a, and the positioning member 230 may fix the spherical fitting portion 40 in the spherical surface 231 a. Therefore, through the matching between the spherical surface 231a and the spherical matching part 40 and the fixing of the spherical matching part 40 in the spherical surface 231a by the positioning piece 230, the connection strength between the connecting rod assembly 4 and the motor push rod 23 is ensured, and meanwhile, the disassembly and the assembly between the connecting rod assembly 4 and the motor push rod 23 are facilitated.
Further, as shown in fig. 5 and 6, the positioning member 230 is disposed in the matching recess 231 and the positioning member 230 is sleeved on the connecting rod assembly 4, the positioning member 230 is respectively abutted against the outer peripheral wall of the spherical matching portion 40 and the inner wall of the matching recess 231, the spherical matching portion 40 passes through the positioning member 230 to extend into the matching recess 231 to be in contact fit with the spherical surface 231a, and the connection strength between the connecting rod assembly 4 and the motor push rod 23 is further ensured. The positioning member 230 may be fixedly installed in the fitting recess 231, for example, but not limited to, the positioning member 230 may be fixedly connected with the motor push rod 23 through a threaded connection.
In some embodiments of the present invention, the housing 1 includes a main cylinder 11 with two open sides, a bottom cover 12 and a fixing plate 13, the motor primary 21 is fixed on the inner wall of the main cylinder 11, the bottom cover 12 is disposed on the main cylinder 11 to close one open side of the main cylinder 11, the elastic member 3 is stopped against the bottom cover 12, the fixing plate 13 is disposed on the main cylinder 11 to close the other open side of the main cylinder 11, and a first end 23a of the motor push rod penetrates the fixing plate 13. For example, as shown in fig. 1 to 9, the main cylinder 11 may be formed in a substantially cylindrical structure, two axial ends of the main cylinder 11 are open, the bottom cover 12 is disposed at one axial end of the main cylinder 11, and the fixing plate 13 is disposed at the other axial end of the main cylinder 11, so that a closed accommodating space is defined between the bottom cover 12, the main cylinder 11, and the fixing plate 13, so that dust, water, and the like cannot enter the accommodating space, and the dustproof and waterproof effects of the pedal feel simulator 100 are achieved. One end of the elastic member 3 may be stopped against the bottom cover 12, and the motor push rod 23 may be inserted through the fixing plate 13 such that the first end 23a of the motor push rod passes through the fixing plate 13 to be suitable for connecting with the pedal 101.
Specifically, as shown in fig. 1 to 4, one end of the main cylinder 11 connected to the fixed plate 13 may be formed with a first connection portion 111, the first connection portion 111 may be formed to protrude outward in a radial direction of the main cylinder 11, and a first fixing member 10a is inserted into the first connection portion 11, so that the main cylinder 11 and the fixed plate 13 may be fixedly connected by the first fixing member 10 a; the outer edge of the bottom cover 12 may be formed with a second connecting portion 122, the second connecting portion 122 may be formed to protrude outward in the radial direction of the bottom cover 12, and a second fixing member 10b is inserted into the second connecting portion 122, so that the main cylinder 11 and the bottom cover 12 can be fixedly connected by the second fixing member 10 b; the third fixing member 10c is provided on the fixing plate 13 in a penetrating manner, so that the pedal feel simulator 100 can be fixed on the vehicle through the third fixing member 10c, which facilitates the installation of the pedal feel simulator 100, and the fixing plate 13 can play a role of supporting the pedal feel simulator 100. The first fixing member 10a, the second fixing member 10b, and the third fixing member 10c may be bolts.
In some embodiments of the present invention, as shown in fig. 1, 2, 5, 8 and 9, the outer circumferential wall of the fixed plate 13 is located outside the outer circumferential wall of the main cylinder 11, thereby facilitating the penetration of the third fixing member 10c on the fixed plate 13 to mount the pedal feel simulator 100 on the vehicle. Here, the direction "outer" refers to a direction away from the center axis of the pedal feel simulator 100, and the opposite direction is defined as "inner".
Further, a gasket is provided between the bottom cover 12 and the main cylinder 11. For example, in the example of fig. 2, 4, 8 and 9, the bottom cover sealing ring 120 is provided between the bottom cover 12 and the main cylinder 11, which improves the sealing performance between the bottom cover 12 and the main cylinder 11, thereby further ensuring the sealing performance of the housing 1 and improving the dust-proof and water-proof effects of the pedal feel simulator 100.
Wherein, at least one of the lower cap 12 and the main cylinder 11 may be formed with a first receiving groove 12a, and the lower cap packing 120 may be disposed in the first receiving groove 12a to limit the lower cap packing 120. For example, in the example of fig. 4, the first receiving groove 12a is formed on the peripheral wall of the bottom cover 12, and the first receiving groove 12a may be formed by a part of the peripheral wall of the bottom cover 12 being recessed inward. Of course, the first receiving groove 12a may be formed in the main cylinder 11, or the first receiving groove 12a may be formed in both the lower cap 12 and the main cylinder 11, and the first receiving groove 12a in the lower cap 12 and the first receiving groove 12a in the main cylinder 11 may be disposed opposite to each other to receive the lower cap packing 120.
As shown in fig. 2 and 3, a through hole penetrating through the fixing plate 13 along the thickness direction is formed on the fixing plate 13, the first end 23a of the motor push rod penetrates through the fixing plate 13 through the through hole, and a fixing plate sealing ring 130 is arranged between the motor push rod 23 and the wall surface of the through hole to improve the sealing performance between the motor push rod 23 and the fixing plate 13, thereby further ensuring the sealing performance of the housing 1 and improving the dustproof and waterproof effects of the pedal feeling simulator 100. Wherein, part of the wall surface of the through hole may be recessed outward to form a second receiving groove 13a, and the fixing plate sealing ring 130 may be disposed in the second receiving groove 13a to achieve the limiting of the fixing plate sealing ring 130.
The vehicle according to the second aspect embodiment of the invention includes a vehicle body, a pedal 101, a pedal feel simulator 100, displacement detection means, and pressure detection means, wherein the pedal feel simulator 100 is the pedal feel simulator 100 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, a pedal 101 is rotatably arranged on the vehicle body, a shell 1 of the pedal feeling simulator 100 is arranged on the vehicle body, a first end 23a of a motor push rod is connected with the pedal 101, and a linear motor 2 is connected with the electronic control unit. The displacement detection device can be used for detecting the displacement of the motor push rod 23 and is connected with the electronic control unit, so that the displacement detection device can transmit a detection result to the electronic control unit, the pressure detection device can be used for detecting the bearing pressure of the first end 23a of the motor push rod and is connected with the electronic control unit, and the pressure detection device can transmit the detection result to the electronic control unit. The electronic control unit can analyze the detection results of the displacement detection device and the pressure detection device, calculate the optimal target pedal reaction force and the compensation force required to be provided by the linear motor 2, transmit the optimization result to the linear motor 2, receive signals by the linear motor 2 to enable the motor primary 21 and the motor secondary 22 to interact with each other, enable the motor secondary 22 to apply corresponding compensation force to the motor push rod 23, and accordingly improve the pedal feeling effect when a driver steps on the pedal; meanwhile, the electronic control unit can analyze and obtain a final braking scheme according to the optimal target pedal reaction force and by combining the running state, the real-time road condition and the like of the real vehicle, and transmits corresponding signals to the actuating mechanism to realize the braking of the vehicle. Wherein, the concrete position of displacement detection device and pressure detection device can specifically set up according to actual demand.
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 and the like do not need to be arranged, the layout is flexible, the overall structure of the vehicle is convenient to arrange, the quality of the vehicle is reduced, the braking effect of a braking system of the vehicle and the braking feel of a driver are improved, and the electric braking of the vehicle is realized. Wherein, the pedal feel simulator 100 can be installed under the floor of the vehicle body, and the pedal feel simulator 100 can not occupy the space of the cockpit and the engine compartment at the moment, thereby further facilitating the arrangement of the overall structure of the vehicle and improving the comfort of the 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.
The pedal feel simulator 100 for a vehicle according to the embodiment of the present invention will be described in detail in three specific embodiments with reference to fig. 1 to 9. It is to be understood that the following description is only exemplary, and not a specific limitation of the invention.
Example one
In the present embodiment, as shown in fig. 1 to 7, the pedal feel simulator 100 includes a housing 1, a linear motor 2, an elastic member 3, and a link assembly 4.
The housing 1 includes a main cylinder 11, a bottom cover 12, and a fixed plate 13, the main cylinder 11 is formed substantially in a cylindrical structure, both axial ends of the main cylinder 11 are open, the bottom cover 12 is provided at one axial end (e.g., left end in fig. 2) of the main cylinder 11, and the fixed plate 13 is provided at the other axial end (e.g., right end in fig. 2) of the main cylinder 11, such that the bottom cover 12, the main cylinder 11, and the fixed plate 13 collectively define a closed accommodation space therebetween. Specifically, as shown in fig. 1 and 2, a first connecting portion 111 is formed at the upper end of the main cylinder 11, the first connecting portion 111 is formed to protrude outward in the radial direction of the main cylinder 11, a first fixing member 10a is inserted into the first connecting portion 111, and the main cylinder 11 and the fixing plate 13 are fixedly connected by the first fixing member 10 a; a second connecting part 122 is formed at the outer edge of the bottom cover 12, the second connecting part 122 is formed by protruding outwards along the radial direction of the bottom cover 12, a second fixing piece 10b is arranged on the second connecting part 122 in a penetrating way, and the main cylinder body 11 and the bottom cover 12 are fixedly connected through the second fixing piece 10 b; the outer peripheral wall of the fixed plate 13 is located outside the outer peripheral wall of the main cylinder 11, and a third fixing member 10c is penetrated through the fixed plate 13, so that the pedal feel simulator 100 can be fixed to the vehicle by the third fixing member 10c when the pedal feel simulator 100 is applied to the vehicle. The first fixing piece 10ba, the second fixing piece 10b, and the third fixing piece 10c are all bolts.
Further, as shown in fig. 1 to 4, a first receiving groove 12a is formed in the outer circumferential wall of the lower cap 12, the first receiving groove 12a is located above the second connecting portion 122, and the lower cap packing 120 between the lower cap 12 and the main cylinder 11 is disposed in the first receiving groove 12 a. The linear motor 2 comprises a motor primary 21, a motor secondary 22 and a motor push rod 23, wherein the motor primary 21 and the motor secondary 22 are both formed into an annular structure, the motor push rod 23, the motor secondary 22 and the motor primary 21 can be sequentially arranged from inside to outside, the motor primary 21 and the motor secondary 22 are both positioned in the accommodating space, the motor primary 21 is fixed on the inner wall of the shell 1, the motor secondary 22 and the motor primary 21 are arranged at intervals inside and outside, the motor secondary 22 is fixed on the motor push rod 23, the motor primary 21 and the motor secondary 22 interact with each other to enable the motor secondary 22 to move relative to the motor primary 21 along the axial direction of the pedal feeling simulator 100, and therefore the motor secondary 22 can drive the motor push rod 23 to synchronously move. A through hole penetrating through the fixing plate 13 along the thickness direction of the fixing plate 13 is formed in the fixing plate 13, a part of the wall surface of the through hole is recessed outwards to form a second accommodating groove 13a, the first end 23a of the motor push rod penetrates out of the fixing rod through the through hole, and a fixing plate sealing ring 130 between the motor push rod 23 and the wall surface of the through hole is arranged in the second accommodating groove 13 a.
As shown in fig. 1 and 5, the bottom cover 12 is provided with a first mounting protrusion 121, the first mounting protrusion 121 is formed by protruding a part of the inner wall of the bottom cover 12 upward, the second end 23b of the motor push rod is provided with a second mounting protrusion 232, the left end of the elastic member 3 is sleeved outside the first mounting protrusion 121 so that the left end of the elastic member 3 abuts against the bottom cover 12, and the right end of the elastic member 3 is sleeved outside the second mounting protrusion 232 so that the right end of the elastic member 3 abuts against the end surface of the second end 23b of the motor push rod.
Wherein the elastic member 3 is a linear spring. When the driver does not step on the pedal 101, the pedal feel simulator 100 is in the initial position, and the elastic member 3 is in a natural state; when the driver steps on the pedal 101, the elastic member 3 starts to operate to apply an elastic force to the motor push rod 23.
The length of the link assembly 4 is adjustable, and two ends of the link assembly 4 are respectively connected to the first end 23a of the motor push rod and the pedal 101, as shown in fig. 1 and 5, the link assembly 4 includes a first connecting rod 41, a second connecting rod 42 and an adjusting nut 43, the first end 41a of the first connecting rod is formed with a spherical matching portion 40, the first end 23a of the motor push rod is provided with a matching groove 231, the inner wall of the matching groove 231 is provided with a spherical surface 231a, the spherical matching portion 40 extends into the matching groove 231 to contact with the spherical surface 231a, the motor push rod 23 is provided with a positioning member 230 for positioning the spherical matching portion 40 in the spherical surface 231a, the positioning member 230 is arranged in the matching groove 231 and the positioning member 230 is sleeved on the link assembly 4, and the positioning member 230 is respectively abutted to the outer peripheral wall of the spherical matching portion 40 and the inner wall of the matching groove 231. The second end 41b of the first connecting rod is provided with an external thread 411, the first end 42a of the second connecting rod is sleeved on the first connecting rod 41, the first end 42a of the second connecting rod is in threaded fit with the external thread 411, the second end 42b of the second connecting rod is pivotally connected with the pedal 101 through the connecting rod rotating shaft 40a, the adjusting nut 43 is sleeved on the first connecting rod 41, and the adjusting nut 43 is in threaded fit with the external thread 411; when the adjusting nut 43 is tightened, the position of the second connecting rod 42 can be fixed, so that the position of the second connecting rod 42 relative to the first connecting rod 41 is kept unchanged, and the length of the connecting rod assembly 4 is kept unchanged; when the adjustment nut 43 is loosened, the first end 42a of the second connecting rod adjusts the position of the second connecting rod 42 relative to the first connecting rod 41 by threadedly engaging with the external thread 411, thereby adjusting the length of the link assembly 4.
When the pedal feel simulator 100 is applied to a vehicle, the vehicle further includes a pedal 101, a vehicle body, a displacement detecting device and a pressure detecting device, the pedal 101 can extend along a curve, a support 102 is formed on the vehicle body, the pedal 101 is rotatably provided on the support 102 through a support rotating shaft 102a, so that the pedal 101 can rotate around the support rotating shaft 102a, the vehicle body is provided with an electronic control unit, the linear motor 2 is connected with the electronic control unit, the housing 1 of the pedal feel simulator 100 is mounted on the vehicle body through a third fixing member 10c, the displacement detecting device is used for detecting the displacement of the motor push rod 23 and is connected with the electronic control unit, so that the displacement detecting device can transmit a detection result to the electronic control unit, the pressure detecting device is used for detecting the bearing pressure of the first end 23a of the motor push rod and is connected with the electronic control unit, so that the pressure detection means can transmit the detection result to the electronic control unit.
When a vehicle needs braking, a driver steps on the pedal 101, the pedal 101 rotates clockwise around the support rotating shaft 102a, the distance between the stepping force of the driver on the pedal 101 and the support rotating shaft 102a is larger than the distance between the second connecting rod 42 and the support rotating shaft 102a, so that the stepping force can be amplified and then transmitted to the motor push rod 23 through the connecting rod assembly 4, the motor push rod 23 moves leftwards along the axial direction of the pedal feeling simulator 100 to compress the elastic part 3, the elastic part 3 can apply elastic force to the motor push rod 23 to provide basic pedal counterforce, and the 'braking feeling' of the pedal 101 when the braking system works is ensured; the displacement detection device such as a displacement sensor can detect the displacement of the motor push rod 23 and/or the displacement of the motor secondary 22 and transmit the detection result to the electronic control unit, the pressure detection device such as a pressure sensor can detect the bearing pressure of the first end 23a of the motor push rod and transmit the detection result to the electronic control unit through an electric signal to analyze the detection result, the electronic control unit can calculate the optimal target pedal reaction force and the compensation force required to be provided by the linear motor 2, the compensation force required to be provided by the linear motor 2 can be the difference between the optimal target pedal reaction force and the basic pedal reaction force, at this time, the electronic control unit also transmits the optimization result to the linear motor 2 through the electric signal, the linear motor 2 receives the signal to enable the motor primary 21 and the motor secondary 22 to interact, so that the motor secondary 22 can apply corresponding compensation force to the motor push rod 23, the sum of the basic pedal reaction force and the compensation force forms the optimal target pedal reaction force, and the optimal target pedal reaction force acts on the motor push rod 23 to be matched with the running state of the real vehicle, so that the pedal feeling effect of a driver when stepping on the pedal 101 can be improved, and the operation comfort of the driver can be improved; meanwhile, the electronic control unit can analyze and obtain a final braking scheme according to the optimal target pedal reaction force and by combining the running state, the real-time road condition and the like of the real vehicle, and transmits corresponding signals to the actuating mechanism to realize the braking of the vehicle.
Example two
As shown in fig. 8, the present embodiment has substantially the same structure as the first embodiment, wherein the same reference numerals are used for the same components, except that: the number of the elastic pieces 3 is two; the fixed plate 13 is provided with a bracket 10, and the pedal 101 is pivotally connected with the bracket 10; the pedal 101 is provided with a stopper 101b which abuts against the first end 23a of the motor push rod.
As shown in fig. 8, a first mounting protrusion 121 is provided on the bottom cover 12, the first mounting protrusion 121 is formed by protruding a part of the inner wall of the bottom cover 12 upward, a third mounting protrusion 123 is provided on the upper end surface of the first mounting protrusion 121, the third mounting protrusion 123 is formed by protruding a part of the upper end surface of the first mounting protrusion 121 upward, the first mounting protrusion 121 and the third mounting protrusion 123 are coaxially provided, the first mounting protrusion 121 and the third mounting protrusion 123 are both formed in a circular truncated cone shape, and the cross-sectional area of the third mounting protrusion 123 is smaller than that of the first mounting protrusion 121. The second end 23b of the motor push rod is provided with a second mounting protrusion 232, the second mounting protrusion 232 is formed by a part of the end surface of the second end 23b of the motor push rod protruding downwards, an avoiding groove 232a is formed on the second mounting protrusion 232, and the second mounting protrusion 122 can be matched in the avoiding groove 232a from bottom to top so as to avoid collision between the second mounting protrusion 232 and the third mounting protrusion 123, and meanwhile, the structure of the pedal feeling simulator 100 is more compact.
The two elastic members 3 are respectively a first elastic member 31 and a second elastic member 32, the first elastic member 31 and the second elastic member 32 are both located at the lower side of the motor push rod 23, the first elastic member 31 and the second elastic member 32 are nested inside and outside, the first elastic member 31 is sleeved outside the second elastic member 32, the lower end of the first elastic member 31 is sleeved outside the first mounting protrusion 121 so that the lower end of the first elastic member 31 abuts against the bottom cover 12, the upper end of the first elastic member 31 is sleeved outside the second mounting protrusion 232 so that the upper end of the first elastic member 31 abuts against the end face of the second end 23b of the motor push rod 23, the lower end of the second elastic member 32 is sleeved outside the third mounting protrusion 123 so that the lower end of the second elastic member 32 abuts against the upper end face of the first mounting protrusion 121, and the upper end of the second elastic member 32 abuts against the end face of the second mounting protrusion 232.
The first elastic member 31 and the second elastic member 32 are both springs, and the initial length of the first elastic member 31 is greater than the initial length of the second elastic member 32, that is, when the driver does not step on the pedal 101 and the pedal feel simulator 100 is at the initial position, the axial length of the first elastic member 31 is greater than the axial length of the second elastic member 32. The first elastic member 31 and the second elastic member 32 are both linear springs, and the stiffness coefficient of the first elastic member 31 may be greater than that of the second elastic member 32. When the driver does not step on the pedal 101, the pedal feel simulator 100 is in an initial position, and at the moment, the first elastic member 31 and the second elastic member 32 are in a natural state; when the driver steps on the pedal 101, the first elastic member 31 and the second elastic member 32 simultaneously start to work to apply an elastic force to the motor push rod 23, and at this time, the first elastic force of the first elastic member 31 and the second elastic force of the second elastic member 32 may be superimposed to form an elastic force of a combined elastic member (including the first elastic member 31 and the second elastic member 32).
When the pedal feel simulator 100 is applied to a vehicle, the vehicle further includes a pedal 101, a vehicle body, a displacement detection device and a pressure detection device, the pedal 101 is formed into a substantially flat plate structure, an electronic control unit is provided on the vehicle body, the linear motor 2 is connected to the electronic control unit, the housing 1 of the pedal feel simulator 100 is mounted on the vehicle body through a third fixing member 10c, the displacement detection device is used for detecting the displacement of the motor push rod 23 and is connected to the electronic control unit, so that the displacement detection device can transmit a detection result to the electronic control unit, the pressure detection device is used for detecting the bearing pressure of the first end 23a of the motor push rod and is connected to the electronic control unit, so that the pressure detection device can transmit the detection result to the electronic control unit.
The fixed plate 13 is provided with a bracket 10, and the pedal 101 is rotatably arranged on the bracket 10 through a bracket rotating shaft 10a, namely the bracket rotating shaft 10a can be used as a rotating fulcrum of the pedal 101; the pedal 101 is provided with a stopping part 101b which stops against the first end 23a of the motor push rod, and the pedal 101 can transmit the treading force of the driver to the motor push rod 23 through the stopping part 101 b; the pedal 101 is formed with a limiting portion 101a, and the limiting portion 101a and the stopping member 101b are respectively located at two sides of the support rotating shaft 10a, so that the limiting portion 101a can play a limiting role, the pedal 101 is prevented from reversely rotating at an initial position, and the operation of a driver is facilitated. The stopping member 101b is a roller, and the roller is rotatably mounted on the pedal 101 through a roller rotating shaft 101 c.
When a vehicle needs braking, a driver steps on the pedal 101, the pedal 101 rotates anticlockwise around the support rotating shaft 10a, and as the distance between the stepping force of the driver on the pedal 101 and the support rotating shaft 10a is larger than the distance between the roller and the support rotating shaft 10a, the stepping force is amplified and then transmitted to the motor push rod 23 through the stopping piece 101b, the motor push rod 23 moves downwards along the axial direction of the pedal feeling simulator 100 to compress the first elastic piece 31 and the second elastic piece 32, and the first elastic piece 31 and the second elastic piece 32 can apply elastic force to the motor push rod 23 to provide basic pedal counterforce so as to ensure the 'braking feeling' of the pedal 101 when the braking system works; the displacement detection device such as a displacement sensor can detect the displacement of the motor push rod 23 and/or the displacement of the motor secondary 22 and transmit the detection result to the electronic control unit, the pressure detection device such as a pressure sensor can detect the bearing pressure of the first end 23a of the motor push rod and transmit the detection result to the electronic control unit through an electric signal to analyze the detection result, the electronic control unit can calculate the optimal target pedal reaction force and the compensation force required to be provided by the linear motor 2, the compensation force required to be provided by the linear motor 2 can be the difference between the optimal target pedal reaction force and the basic pedal reaction force, at this time, the electronic control unit also transmits the optimization result to the linear motor 2 through the electric signal, the linear motor 2 receives the signal to enable the motor primary 21 and the motor secondary 22 to interact, so that the motor secondary 22 can apply corresponding compensation force to the motor push rod 23, the sum of the basic pedal reaction force and the compensation force forms the optimal target pedal reaction force, and the optimal target pedal reaction force acts on the motor push rod 23 to be matched with the running state of the real vehicle, so that the pedal feeling effect of a driver when stepping on the pedal 101 can be improved, and the operation comfort of the driver can be improved; meanwhile, the electronic control unit can analyze and obtain a final braking scheme according to the optimal target pedal reaction force and by combining the running state, the real-time road condition and the like of the real vehicle, and transmits corresponding signals to the actuating mechanism to realize the braking of the vehicle.
EXAMPLE III
As shown in fig. 9, the present embodiment has substantially the same structure as the second embodiment, wherein the same reference numerals are used for the same components, except that: the two elastic pieces 3 are respectively positioned at two axial sides of the motor primary 21; the second mounting protrusion 232 is fixedly mounted at the second end 23b of the motor push rod by a mounting screw 232 b.
The two elastic members 3 are respectively a first elastic member 31 and a second elastic member 32, the first elastic member 31 is located in the accommodating space, an upper end of the first elastic member 31 is sleeved on an outer peripheral wall of the second mounting protrusion 232, and a lower end of the first elastic member 31 is sleeved on an outer peripheral wall of the first mounting protrusion 121. The second elastic member 32 is located in the accommodating space, a stopping portion 233 is formed on the motor push rod 23, so that an installation space is defined between the motor push rod 23, the main cylinder body 11 and the primary motor 21 together, the second elastic member 32 is located in the installation space, the upper end of the second elastic member 32 is abutted against the stopping portion 233, the lower end of the second elastic member 32 is abutted against the primary motor 21, the outer peripheral wall of the second elastic member 32 can be matched with the inner peripheral wall of the main cylinder body 11, that is, the second elastic member 32 can be positioned, and the position of the second elastic member 32 is prevented from being changed.
When a vehicle needs braking, a driver steps on the pedal 101, the pedal 101 rotates anticlockwise around the support rotating shaft 10a, the distance between the stepping force of the driver on the pedal 101 and the support rotating shaft 10a is larger than the distance between the roller and the support rotating shaft 10a, so that the stepping force is amplified and then transmitted to the motor push rod 23 through the abutting piece 101b, the motor push rod 23 moves downwards along the axial direction of the pedal feeling simulator 100 to compress the first elastic piece 31 and the second elastic piece 32, the first elastic piece 31 and the second elastic piece 32 can apply elastic force to the motor push rod 23 to provide basic pedal counterforce, and the 'braking feeling' of the pedal 101 when a braking system works is ensured; the displacement detection device such as a displacement sensor can detect the displacement of the motor push rod 23 and/or the displacement of the motor secondary 22 and transmit the detection result to the electronic control unit, the pressure detection device such as a pressure sensor can detect the bearing pressure of the first end 23a of the motor push rod and transmit the detection result to the electronic control unit through an electric signal to analyze the detection result, the electronic control unit can calculate the optimal target pedal reaction force and the compensation force required to be provided by the linear motor 2, the compensation force required to be provided by the linear motor 2 can be the difference between the optimal target pedal reaction force and the basic pedal reaction force, at this time, the electronic control unit also transmits the optimization result to the linear motor 2 through the electric signal, the linear motor 2 receives the signal to enable the motor primary 21 and the motor secondary 22 to interact, so that the motor secondary 22 can apply corresponding compensation force to the motor push rod 23, the sum of the basic pedal reaction force and the compensation force forms the optimal target pedal reaction force, and the optimal target pedal reaction force acts on the motor push rod 23 to be matched with the running state of the real vehicle, so that the pedal feeling effect of a driver when stepping on the pedal 101 can be improved, and the operation comfort of the driver can be improved; meanwhile, the electronic control unit can analyze and obtain a final braking scheme according to the optimal target pedal reaction force and by combining the running state, the real-time road condition and the like of the real vehicle, and transmits corresponding signals to the actuating mechanism to realize the braking of the vehicle.
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 (11)

1. A pedal feel simulator for a vehicle, the vehicle including a pedal, the pedal feel simulator comprising:
a housing;
the linear motor comprises a motor primary, a motor secondary and a motor push rod, the motor primary is fixed on the inner wall of the shell, the motor secondary is arranged in the motor primary, the motor secondary is matched with the motor primary to enable the motor secondary to move axially relative to the motor primary, the motor secondary is sleeved on the motor push rod to drive the motor push rod to move synchronously, and the first end of the motor push rod extends out of the shell to be suitable for being connected with the pedal;
and the elastic piece is used for applying elastic force to the motor push rod.
2. The pedal feel simulator for a vehicle according to claim 1, wherein the elastic member is provided in the housing and both ends of the elastic member are stopped against an inner wall of the housing and a second end of the motor push rod, respectively.
3. The pedal feel simulator for the vehicle according to claim 2, wherein a first fitting projection is provided on an inner wall of the housing, and one end of the elastic member is fitted over the first fitting projection.
4. The pedal feel simulator for the vehicle according to claim 2, wherein a second end of the motor push rod is provided with a second mounting protrusion, and the other end of the elastic member is fitted over the second mounting protrusion.
5. The pedal feel simulator for a vehicle of claim 1, further comprising a length adjustable linkage assembly, both ends of the linkage assembly being connected to the first end of the motor push rod and the pedal, respectively.
6. The pedal feel simulator for a vehicle of claim 5, wherein the linkage assembly comprises:
a first end of the first connecting rod is connected with a first end of the motor push rod, and a second end of the first connecting rod is provided with an external thread;
a first end of the second connecting rod is sleeved on the first connecting rod and is in threaded fit with the external thread, and a second end of the second connecting rod is suitable for being connected with the pedal;
and the adjusting nut is sleeved on the first connecting rod and is in threaded fit with the external thread.
7. The pedal feel simulator for the vehicle according to claim 5, wherein a first end of the motor push rod is provided with a fitting groove, an inner wall of the fitting groove is provided with a spherical surface, one end of the link assembly is formed into a spherical fitting portion, the spherical fitting portion extends into the fitting groove and contacts with the spherical surface, and the motor push rod is provided with a positioning member for positioning the spherical fitting portion in the spherical surface.
8. The pedal feel simulator for a vehicle according to claim 7, wherein the positioning member is provided in the fitting recess and the positioning member is fitted over the link assembly, the positioning member being stopped against an outer peripheral wall of the spherical fitting portion and an inner wall of the fitting recess, respectively.
9. The pedal feel simulator for a vehicle according to any one of claims 1 to 8, wherein the housing includes:
the motor primary is fixed on the inner wall of the main cylinder body;
the bottom cover is arranged on the main cylinder body to close one side opening of the main cylinder body, and the elastic piece is stopped against the bottom cover;
the fixed plate is arranged on the main cylinder body to close the opening on the other side of the main cylinder body, and the first end of the motor push rod penetrates out of the fixed plate.
10. The pedal feel simulator for a vehicle according to claim 9, wherein the outer peripheral wall of the fixed plate is located outside the outer peripheral wall of the main cylinder.
11. 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 according to any one of claims 1-10, the shell is arranged on the vehicle body, a first end of the motor push rod is connected with the pedal, and the linear motor is connected with the electronic control unit;
the displacement detection device is used for detecting the displacement of the motor push rod and is connected with the electronic control unit;
and the pressure detection device is used for detecting the bearing pressure of the first end of the motor push rod and is connected with the electronic control unit.
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US11465600B2 (en) * 2019-10-31 2022-10-11 ZF Active Safety US Inc. Adjustable brake pedal simulator device
CN113232634B (en) * 2021-06-03 2022-05-27 重庆三峡学院 Electric vehicle brake pedal simulator and brake pedal feedback control method
CN116101240B (en) * 2021-11-10 2024-04-23 长沙泊呈科技有限公司 Pedal simulator for vehicle braking system and braking method

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FR2756797A1 (en) * 1996-12-10 1998-06-12 Bosch Gmbh Robert HYDRAULIC BRAKE DEVICE
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