CN110027532B

CN110027532B - Pedal sense simulator of vehicle and vehicle with same

Info

Publication number: CN110027532B
Application number: CN201810030882.4A
Authority: CN
Inventors: 欧阳鑫; 王铁君; 李传博; 刘苏丽
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2018-01-12
Filing date: 2018-01-12
Publication date: 2021-10-22
Anticipated expiration: 2038-01-12
Also published as: CN110027532A

Abstract

The invention discloses a pedal feeling simulator of a vehicle and the vehicle with the pedal feeling simulator. The vehicle includes a pedal, and the pedal feel simulator includes a housing, a slider-crank mechanism, a drive member, a moving push rod, and a first elastic member. The crank-slider mechanism comprises a crank, a connecting rod and a slider, wherein two ends of the connecting rod are respectively connected with the crank and the slider, and the slider is arranged in the shell in a reciprocating manner. The driving component is connected with one end of the crank to drive the crank to rotate. One end of the movable push rod is matched with the sliding block to drive the sliding block to move, and the other end of the movable push rod is suitable for being connected with the pedal. The first elastic piece is arranged in the shell, the first end of the first elastic piece is positioned in the shell, and the second end of the first elastic piece is matched with the sliding block. According to the pedal feeling simulator of the vehicle, the pedal feeling in the driving process is simulated by adopting the pure mechanical mechanism, so that the response speed and the mechanical performance of a vehicle braking system can be improved.

Description

Pedal sense simulator of vehicle and vehicle with same

Technical Field

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

Background

In order to perfect the effective braking of the automobile, the automobile generally adopts the brake-by-wire, and the brake-by-wire not only has the characteristics of high response speed, high control precision, good braking performance, flexible arrangement and the like, but also can be integrated with an automobile dynamic control system to provide flexible and variable braking force for the automobile. In the brake-by-wire system, since the hydraulic or mechanical connection between the brake pedal and the brake is cancelled, the driver cannot directly sense the brake reaction force fed back to the brake pedal during braking, and the brake feeling of the conventional brake system is lost, so that the brake feeling of the pedal is poor. The braking feeling is a comprehensive feeling that includes a pedal braking feeling, which is the most important component, among factors such as the vehicle braking deceleration felt by the driver, the audible braking noise, and the visual vehicle deceleration.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the pedal feeling simulator of the vehicle, which has the advantages of simple structure and good mechanical performance.

The invention also provides a vehicle, which is provided with the pedal feeling simulator of the vehicle.

According to an embodiment of the present invention, a pedal feel simulator of a vehicle including a pedal includes: a housing; the crank sliding block mechanism comprises a crank, a connecting rod and a sliding block, two ends of the connecting rod are respectively connected with the crank and the sliding block, and the sliding block is arranged in the shell in a reciprocating manner; the driving component is connected with one end of the crank so as to drive the crank to rotate; one end of the movable push rod is matched with the sliding block to drive the sliding block to move, and the other end of the movable push rod is suitable for being connected with the pedal; the first elastic piece is arranged in the shell, the first end of the first elastic piece is positioned on the shell, and the second end of the first elastic piece is matched with the sliding block.

According to the pedal feeling simulator of the vehicle, comprehensive acting force of the driving part and the first elastic part on the crank sliding block mechanism is transmitted to the moving push rod, so that the characteristic of the pedal is simulated, and the requirement that the characteristic of the pedal is nonlinear can be met. The first elastic piece generates elastic force after being compressed and deformed, so that basic pedal counterforce can be provided for the pedal indirectly, the brake feeling of the pedal in real time when the brake system works is guaranteed, the driving part and the first elastic piece can provide target pedal force together, and the residual part between the basic pedal force and the target pedal force is compensated. The pedal brake feeling is obtained by feedback after a driver steps on a pedal and removing intermediate variables (such as hydraulic pressure, air pressure and the like), and the response speed and the mechanical performance of a vehicle brake system can be improved by adopting a pure mechanical mechanism to simulate the pedal feeling in the driving process.

According to some embodiments of the present invention, the sliding device further comprises a spring seat and a second elastic member, the spring seat is disposed outside the housing and on the moving push rod to move with the moving push rod, and two ends of the second elastic member respectively abut against the housing and the spring seat.

In some embodiments of the invention, the dust cover is arranged on the outer side of the second elastic piece, and two ends of the dust cover are respectively arranged on the spring seat and the outer shell.

According to some embodiments of the invention, the pedal device further comprises a connecting rod assembly with adjustable length, and two ends of the connecting rod assembly are respectively connected with the other end of the moving push rod and the pedal.

Further, the connecting rod assembly includes: the first end of the first connecting piece is connected with the movable push rod, and the second end of the first connecting piece is provided with external threads; the first end of the second connecting piece is sleeved outside the first connecting piece and is in threaded fit with the external thread, and the second end of the second connecting piece is suitable for being connected with the pedal; and the adjusting nut is sleeved on the first connecting piece and is in threaded fit with the external thread.

According to some embodiments of the invention, further comprising a mounting housing provided on the outer shell, the drive member being provided within the mounting housing.

According to some embodiments of the present invention, the slider is a hollow member, the connecting rod extends into the slider, the slider-crank mechanism further includes a connecting shaft and a positioning member, the connecting shaft is disposed on the connecting rod in a penetrating manner, at least one end of the connecting shaft extends out of the slider, and the positioning member is matched with an end portion of the connecting shaft extending out of the slider to position the connecting shaft on the slider.

According to some embodiments of the invention, the drive member comprises: a motor; the input gear is arranged on a motor shaft of the motor so as to be driven by the motor to rotate; the output gear is meshed with the input gear, and one end of the crank is arranged on the output gear to be driven by the output gear to rotate.

Further, the diameter of the input gear is smaller than the diameter of the output gear.

A vehicle according to an embodiment of the present invention includes: the vehicle body is provided with an electronic control unit; the pedal is rotatably arranged on the vehicle body; the pedal feeling simulator is the pedal feeling simulator according to any one of the above, the shell is arranged on the vehicle body, the movable push rod is connected with the pedal, and the driving part is connected with the electronic control unit; and the detection device is used for detecting the stroke of the pedal and is connected with the electronic control unit.

According to the vehicle provided by the embodiment of the invention, the comprehensive acting force of the driving part and the first elastic part on the crank sliding block mechanism is transmitted to the moving push rod, so that the characteristic of the pedal is simulated, and the requirement that the characteristic of the pedal is nonlinear can be met. The first elastic piece generates elastic force after being compressed and deformed, so that basic pedal counterforce can be provided for the pedal indirectly, the brake feeling of the pedal in real time when the brake system works is guaranteed, the driving part and the first elastic piece can provide target pedal force together, and the residual part between the basic pedal force and the target pedal force is compensated. The pedal brake feeling is obtained by feedback after a driver steps on a pedal and removing intermediate variables (such as hydraulic pressure, air pressure and the like), and the response speed and the mechanical performance of a vehicle brake system can be improved by adopting a pure mechanical mechanism to simulate the pedal feeling in the driving process.

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 simple structural diagram of a pedal feel simulator of a vehicle according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a pedal feel simulator of a vehicle according to an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a linkage assembly of a pedal feel simulator of a vehicle according to an embodiment of the present invention;

FIG. 4 is a partial schematic structural view of a pedal feel simulator of a vehicle according to an embodiment of the invention;

FIG. 5 is a partial schematic view of a pedal feel simulator of a vehicle according to an embodiment of the invention;

FIG. 6 is a partial schematic view of a pedal feel simulator of a vehicle according to an embodiment of the present invention;

fig. 7 is a schematic sectional structure view of a pedal feel simulator of a vehicle according to an embodiment of the present invention.

Reference numerals:

a pedal feeling simulator 1, a pedal 2, an electronic control unit 3, a detection device 4,

a housing 10, an open end 11, a throat 111, a closed end 12, a central through hole 121,

the slider-crank mechanism 20 is provided with,

the crank 21, the link 22, the link cover 221, the body portion 222, the link bolt 223, the link nut 224,

the slide block 23, the convex block 231, the connecting shaft 24, the positioning piece 25, the bearing bush 26,

a driving part 30, a motor 31, a motor shaft 310, a flat key 320, an input gear 32, an output gear 33,

the push rod 40 is moved so that the push rod,

the first elastic member 50 is formed in a shape of a circular ring,

the spring seats 60 are formed of,

the second elastic member 70 is provided with a second elastic member,

the dust cover 80 is provided with a dust cover,

a connecting rod assembly 90, a first connecting member 91, a second connecting member 92, an adjusting nut 93,

the mounting housing 100, the open mouth 110,

bearing assembly 200, bearing seat 210, bearing 220, and rotating shaft 230.

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 "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present 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.

As shown in fig. 1 to 2 and 4 to 7, a pedal feel simulator 1 of a vehicle according to an embodiment of the present invention, the vehicle including a pedal 2, the pedal feel simulator 1 includes a housing 10, a slider-crank mechanism 20, a driving member 30, a moving push rod 40, and a first elastic member 50.

Specifically, as shown in fig. 1 to 2 and 4 to 7, the crank-slider mechanism 20 includes a crank 21, a connecting rod 2, and a slider 23, both ends of the connecting rod 2 are connected to the crank 21 and the slider 23, respectively, and the slider 23 is disposed in the housing 10 so as to be capable of reciprocating. The driving member 30 is connected to one end of the crank 21 to drive the crank 21 to rotate. One end of the moving push rod 40 is matched with the slide block 23 to drive the slide block 23 to move, and the other end of the moving push rod 40 is suitable for being connected with the pedal 2. The first elastic member 50 is disposed in the housing 10, a first end of the first elastic member 50 is positioned in the housing 10, and a second end of the first elastic member 50 is engaged with the slider 23. It should be noted that the "first end" and the "second end" mentioned herein are two ends of the first elastic member 50, respectively, for example, the "first end" may be an end of the first elastic member 50 close to the driving part 30, and the "second end" may be an end of the first elastic member 50 close to the moving push rod 40.

As shown in fig. 1, a first end of the first elastic member 50 may be positioned on the housing 10, and a second end of the first elastic member 50 may be positioned on the slider 23, and the slider 23 may compress the first elastic member 50 when the slider 23 is pushed to move toward a direction close to the driving part 30. Of course, a first end of the first elastic member 50 may be positioned on the housing 10, and a second end of the first elastic member 50 may be spaced apart from the slider 23, the slider 23 gradually approaches the first elastic member 50 as the slider 23 is pushed to move toward the driving part 30, the slider 23 comes into contact with the second end of the first elastic member 50 after the slider 23 moves a distance, and the slider 23 may compress the first elastic member 50 as the slider 23 continues to move. It should be noted that, as used herein, the phrase "the first end can be positioned on the housing 10" can mean that the first end is fixedly connected, abutted or clamped with the housing 10.

For example, as shown in fig. 7, the housing 10 may be formed in a barrel-shaped structure, the housing 10 has an open end 11 and a closed end 12, the open end 11 has a throat portion 111, the caliber of the throat portion 111 is smaller than the diameter of the middle portion of the housing 10, the closed end 12 has a central through hole 121 passing therethrough, and the slider 23 is located in the housing 10. The driving member 30 is pivotally connected to one end of the crank 21, the other end of the crank 21 is pivotally connected to one end of the connecting rod 2, the other end of the connecting rod 2 extends into the housing 10 from the open end 11 and is pivotally connected to one end of the slider 23, one end of the moving push rod 40 passes through the central through hole 121 and is connected to the other end of the slider 23, and the other end of the moving push rod 40 is connected to the pedal 2. The slider 23 has a projection 231 at an end thereof adjacent to the moving push rod 40, and the projection 231 is provided on the outer peripheral wall of the slider 23. The first elastic element 50 is located in the housing 10, the first elastic element 50 may be sleeved on the slider 23, one end of the first elastic element 50 may abut against the protrusion 231, and the other end of the first elastic element 50 may abut against the throat 111. The first elastic member 50 has a gap with the inner peripheral wall of the housing 10, the first elastic member 50 can be compressed or stretched, and the slider 23 can slide relative to the housing 10.

The driving part 30 can drive one end of the crank 21 to rotate, for example, the driving part 30 can drive the end of one end of the crank 21 to rotate circularly, so as to drive the connecting rod 2 to move, the connecting rod 2 can drive the sliding block 23 to move, the shell 10 can limit the movement of the sliding block 23, and the sliding block 23 can reciprocate along the axial direction of the shell 10. The pedal 2 can push the moving push rod 40 to move, the moving push rod 40 can further push the sliding block 23 to reciprocate along the axial direction of the housing 10, and the sliding block 23 can further compress the first elastic element 50. Moving the push rod 40 may transfer the force of the pedal 2 to other structural components in the pedal feel simulator 1, which may be used to compress the first elastic member 50.

When a driver needs to perform a vehicle braking function during vehicle operation, the driver depresses the pedal 2, the pedal 2 pushes the moving push rod 40 to move leftward (leftward as shown in fig. 1), the moving push rod 40 can further push the slider 23 to move leftward, and the protrusion 231 of the slider 23 comes into contact with the first elastic member 50 and starts to compress the first elastic member 50. Accordingly, the compression deformation of the first elastic member 50 may generate an opposite force to the protrusion 231 and transmit to the moving push rod 40, and the moving push rod 40 may receive a force to the right (right as viewed in fig. 1). The driving component 30 can drive the crank 21 to move, the crank 21 can further drive the connecting rod 2 to move, the connecting rod 2 further drives the sliding block 23 to move, the sliding block 23 can provide assistance for the moving push rod 40, and the reverse acting force applied to the moving push rod 40 is reduced, so that the moving push rod 40 obtains a proper reverse acting force, the reverse acting force is the brake pedal force, and the target values of the pedal force and the pedal stroke are simulated. It should be noted that when the driver feels soft or hard when stepping on the pedal 2, the driver can obtain a better pedal feel by changing the driving force of the driving member 30 to change the force applied to move the push rod 40.

According to the pedal feel simulator 1 of the vehicle of the embodiment of the present invention, the driving member 30 and the first elastic member 50 are used to transmit the comprehensive acting force to the slider-crank mechanism 20 to the moving push rod 40, so as to simulate the pedal characteristics, and thus the requirement that the pedal characteristics are non-linear can be satisfied. Wherein, the elastic force generated by the first elastic member 50 after being compressed and deformed can indirectly provide a basic pedal reaction force for the pedal 2, so as to ensure the brake system to work and ensure the 'brake feeling' of the pedal 2, and the driving member 30 and the first elastic member 50 can together provide a target pedal force to compensate the residual part between the basic pedal force and the target pedal force. The pedal brake feeling is obtained by feedback after a driver steps on the pedal 2 and removing intermediate variables (such as hydraulic pressure, air pressure and the like), and the response speed and the mechanical performance of the vehicle brake system can be improved by adopting a pure mechanical mechanism to simulate the pedal feeling in the driving process.

As shown in fig. 2 and 6 to 7, according to some embodiments of the present invention, pedal feel simulator 1 further includes a spring seat 60 and a second elastic member 70, spring seat 60 is disposed outside housing 10 and spring seat 60 is disposed on moving push rod 40 to move with moving push rod 40, and both ends of second elastic member 70 are stopped against housing 10 and spring seat 60, respectively. It is understood that spring retainer 60 is located at a side of housing 10 adjacent to moving push rod 40, spring retainer 60 is located at an outside of housing 10, spring retainer 60 is connected to moving push rod 40, and second elastic member 70 is located between spring retainer 60 and housing 10. For example, spring seat 60 may be located outside housing 10, spring seat 60 is opposite to closed end 12, movable push rod 40 may be clamped or fixedly connected to spring seat 60, second elastic member 70 is located between housing 10 and spring seat 60, second elastic member 70 may be sleeved on movable push rod 40, one end of second elastic member 70 may abut against closed end 12, and the other end of second elastic member 70 may abut against spring seat 60.

Therefore, the spring seat 60 can transmit the acting force of the moving push rod 40 to the second elastic member 70 to compress the second elastic member 70, the second elastic member 70 assists the first elastic member 50, the second elastic member 70 is the same as the first elastic member 50 in performance, the second elastic member 70 can provide pedal preset force for the vehicle, and normal pedal force can be still maintained after the first elastic member 50 fails, so that the safety factor of the pedal feeling simulator 1 can be improved.

As shown in fig. 2, 4 and 7, in some embodiments of the present invention, the pedal feel simulator 1 may further include a retractable dust cover 80, the dust cover 80 is covered outside the second elastic member 70, and both ends of the dust cover 80 are respectively provided on the spring seat 60 and the housing 10. It will be appreciated that one end of dust cap 80 may be connected to housing 10, the other end of dust cap 80 may be connected to spring retainer 60, housing 10, dust cap 80 and spring retainer 60 may define a chamber within which second resilient member 70 may be located. For example, the dust cover 80 may be formed in a cylindrical shape, the dust cover 80 may be fitted over the second elastic member 70, the dust cover 80 may have corrugations, and the dust cover 80 may be extended and contracted in the deformation direction of the second elastic member 70. From this, dust cover 80 can improve the leakproofness of footboard sensation simulator 1, prevents in dust and water etc. get into footboard sensation simulator 1, leads to the rust of mechanical structure or adhesion dust in footboard sensation simulator 1, and then influences the condition of the sensitivity and the mobility of footboard sensation simulator 1 to can guarantee the working property of footboard sensation simulator 1.

As shown in fig. 1 to 3, according to some embodiments of the present invention, the pedal feel simulator 1 may further include a link assembly 90 with an adjustable length, and both ends of the link assembly 90 are respectively connected to the other end of the moving push rod 40 and the pedal 2. It will be appreciated that one end of the linkage assembly 90 may be connected to the moving push rod 40 and the other end of the linkage assembly 90 may be connected to the pedal 2. The connecting rod assembly 90 is located between the moving push rod 40 and the pedal 2, the connecting rod assembly 90 can be used for transmitting acting force between the pedal 2 and the moving push rod 40, and the connecting rod assembly 90 can also adjust initial force of the pedal 2 and idle stroke of the pedal 2.

Further, as shown in fig. 2-3 and 7, the link assembly 90 includes a first connector 91, a second connector 92, and an adjustment nut 93. The first end of the first connecting member 91 is connected to the moving push rod 40, and the second end of the first connecting member 91 is provided with an external thread. A first end of the second connector 92 is sleeved on the first connector 91 and is in threaded fit with the external thread, and a second end of the second connector 92 is adapted to be connected with the pedal 2. An adjusting nut 93 is externally fitted on the first connector 91 and is screw-engaged with the external thread. For example, the second connector 92 may be provided with a threaded hole, one end of the first connector 91 may be clamped with the movable push rod 40, an outer peripheral wall of the other end of the first connector 91 is provided with a thread, the other end of the first connector 91 may penetrate through the threaded hole to be in threaded connection with the second connector 92, the adjusting nut 93 is sleeved at the other end of the first connector 91, the adjusting nut 93 is in threaded connection with the first connector 91, and the adjusting nut 93 is located between the movable push rod 40 and the second connector 92. Thereby, the first link 91 may be used to connect the second link 92 with the moving push rod 40, the position of the adjustment nut 93 on the first link 91 may be adjusted, and the adjustment nut 93 may be used to adjust the initial force of the pedal 2 and the idle stroke of the pedal 2. The second link 92 may be connected with the pedal 2 to transmit the pedal braking force.

As shown in fig. 2, 4 and 7, according to some embodiments of the present invention, the pedal feel simulator 1 further includes a mounting case 100, the mounting case 100 is provided on the housing 10, and the driving part 30 is provided in the mounting case 100. It is understood that the mounting case 100 is coupled to the housing 10, an installation space is formed inside the mounting case 100, and the driving part 30 is located in the installation space. For example, the mounting case 100 may form an open opening 110, the open opening 110 is connected with the open end 11, the inside of the mounting case 100 is communicated with the inside of the outer shell 10, the connecting rod 2 may shuttle at the interface of the mounting case 100 and the outer shell 10, one part of the connecting rod 22 is located in the mounting case 100, and the other part of the connecting rod 22 is located in the outer shell 10. Therefore, the mounting case 100 can be used to mount the driving member 30, protect the driving member 30, prevent dust and water from affecting the performance of the driving member 30, improve the sealing performance of the pedal feel simulator 1, prevent the driving member 30 from being collided or damaged, and reduce the mechanical noise of the driving member 30.

As shown in fig. 7, the slider 23 may be a hollow member and the link 22 may extend into the slider 23 according to some embodiments of the present invention. The crank-slider mechanism 20 further comprises a connecting shaft 24 and a positioning element 25, the connecting shaft 24 is arranged on the connecting rod 22 in a penetrating mode, at least one end of the connecting shaft 24 extends out of the slider 23, and the positioning element 25 is matched with the end portion, extending out of the slider 23, of the connecting shaft 24 so as to position the connecting shaft 24 on the slider 23. For example, the slider 23 may be formed in a cylindrical shape with one closed end, the closed end has an annular protrusion 231, the annular protrusion 231 extends along a circumferential direction of the cylindrical slider 23, a part of the link 22 may extend into the slider 23 from an open end of the slider 23, an end of the link 22 extending into the slider 23 may be provided with a through hole, the through hole may penetrate through the link 22, a connection shaft 24 may penetrate through the through hole, one end of the connection shaft 24 may penetrate through a circumferential wall of the slider 23, and the positioning member 25 is engaged with an end of the connection shaft 24 located outside the slider 23, so as to limit the end of the connection shaft 24 outside the slider 23. Of course, the number of the positioning members 25 may be two, both ends of the connecting shaft 24 may extend to the peripheral wall of the through slider 23, and the two positioning members 25 may fix both ends of one connecting shaft 24, respectively. Therefore, the connecting rod 22 and the sliding block 23 can be conveniently connected, and the connecting shaft 24 can connect the connecting rod 22 and the sliding block 23 and transfer the acting force between the connecting rod 22 and the sliding block 23. The positioning member 25 can axially position the connecting shaft 24 to prevent the connecting shaft 24 from being displaced. The slider 23 is set as a hollow part, so that the mass of the slider 23 can be reduced, the stress sensitivity of the slider 23 can be improved, different acting forces act on the slider 23, and the slider 23 can form displacements with different distances.

It should be noted that, the specific embodiment of the positioning element 25 fixing the connecting shaft 24 is not specifically limited, for example, the positioning element 25 may be formed in a ring shape, the positioning element 25 may be sleeved on the end portion of the connecting shaft 24 and clamped with the connecting shaft 24, the positioning element 25 may also be a positioning pin, the connecting shaft 24 located outside the slider 23 may be provided with a through hole, the positioning pin may be inserted into the through hole, and the positioning pin may be in interference connection with a portion of the connecting shaft 24 corresponding to the through hole. Further, the connecting shaft 24 may be a piston pin. Further, a bearing bush 26 may be disposed between the connecting shaft 24 and the connecting rod 22, the bearing bush 26 is sleeved on the connecting shaft 24, and the bearing bush 26 is disposed in the through hole. Thus, the bearing bush 26 can improve the wear resistance and the transmission performance between the connecting shaft 24 and the connecting rod 22, and can be used for connecting and supporting the connecting rod 22.

As shown in fig. 1, 5-7, the drive component 30 may include a motor 31, an input gear 32, and an output gear 33, according to some embodiments of the invention. An input gear 32 is provided on a motor shaft 310 of the motor 31 to be driven to rotate by the motor 31, an output gear 33 is engaged with the input gear 32, and one end of the crank 21 is provided on the output gear 33 to be driven to rotate by the output gear 33. It can be understood that the motor 31 can drive the motor shaft 310 to rotate, the input gear 32 can be sleeved on the motor shaft 310, so that the output gear 33 can rotate along with the rotation of the motor shaft 310, the tooth pattern of the output gear 33 can be meshed with the tooth pattern of the input gear 32, therefore, the rotation of the input gear 32 can further drive the output gear 33 to rotate, one end of the crank 21 can be connected with the output gear 33, the crank 21 can rotate along with the output gear 33, and the input gear 32 and the output gear 33 can reduce the speed and increase the torque.

Further, a flat key 320 is provided between the motor shaft 310 and the input gear 32, and the flat key 320 can be used for transmitting the torque between the motor shaft 310 and the input gear 32. The flat key is a key which depends on two side surfaces as working surfaces and transfers torque by pressing the key and the side surface of the key groove. The flat keys are classified into a common flat key, a thin flat key and a guide flat key. The common flat key has good centering property, high positioning precision and convenient folding and assembly, but cannot realize the axial fixation of parts on the shaft and is used for the shaft with high speed or bearing impact and variable load; the thin flat key is used for a thin-wall structure and a place with smaller transmission torque; the guiding flat key is fixed on the shaft by a screw and is used for occasions that the movement amount of parts on the shaft along the shaft is not large.

It should be noted that the dimensions of the input gear 32 and the output gear 33 are not limited in particular, and in some embodiments of the present invention, the diameter of the input gear 32 is smaller than the diameter of the output gear 33. It will be appreciated that the input gear 32 is undersized relative to the output gear 33, and that the output gear 33 rotates at a speed less than the speed of the input gear 32. Thus, the rotation speed of the motor 31 transmitted to the crank 21 can be reduced by the cooperation of the input gear 32 and the output gear 33, and the input gear 32 and the output gear 33 can serve as speed reduction means. Further, different rotational angular speeds of the crank 21 can be achieved by connecting the crank 21 at different positions of the output gear 33.

As shown in fig. 1, a vehicle according to an embodiment of the present invention includes a vehicle body, a pedal 2, a pedal feel simulator 1, and a detection device 4. An electronic control unit 3 is arranged on the vehicle body, and a pedal 2 is rotatably arranged on the vehicle body. The pedal feel simulator 1 is according to the pedal feel simulator 1 as described above. The housing 10 is provided on the vehicle body, the moving push rod 40 is connected to the pedal 2, and the driving part 30 is connected to the electronic control unit 3. The detection means 4 can be used to detect the travel of the pedal 2, the detection means 4 being connected to the electronic control unit 3.

When the vehicle needs to be braked, a driver steps on the pedal 2, the detection device 1 detects the stroke of the pedal 2 and transmits the stroke to the electronic control unit 3, and the electronic control unit 3 can further control the rotating speed of the motor 31, so that corresponding assistance is formed on the movable push rod 40 and is transmitted to the pedal 2, and the driver is provided with a pedal brake feeling.

According to the vehicle of the embodiment of the invention, the driving part 30 and the first elastic piece 50 are used for comprehensively acting force on the crank slider mechanism 20 and transmitting the force to the moving push rod 40 so as to simulate the pedal characteristics, and the requirement that the pedal characteristics are non-linear can be met. Wherein, the elastic force generated by the first elastic member 50 after being compressed and deformed can indirectly provide a basic pedal reaction force for the pedal 2, so as to ensure the brake system to work and ensure the 'brake feeling' of the pedal 2, and the driving member 30 and the first elastic member 50 can together provide a target pedal force to compensate the residual part between the basic pedal force and the target pedal force. The pedal brake feeling is obtained by feedback after a driver steps on the pedal 2 and removing intermediate variables (such as hydraulic pressure, air pressure and the like), and the response speed and the mechanical performance of the vehicle brake system can be improved by adopting a pure mechanical mechanism to simulate the pedal feeling in the driving process.

Further, the electronic Control unit 3 may be an ecu (electronic Control unit) electronic Control unit, which is also called a "driving computer" or a "vehicle-mounted computer". The controller is a special microcomputer controller for the automobile in terms of application. It is similar to common computer and consists of microprocessor (CPU), memory (ROM, RAM), I/O interface, A/D converter, shaping and driving IC. The simple expression is that the ECU is the brain of the automobile. The detection means 4 may be a sensor. The sensor can sense the measured information and convert the sensed information into electric signals or other required information output according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like.

The voltage working range of the ECU is generally 6.5-16V (a voltage stabilizer is arranged at the key part inside), the working current is 0.015-0.1A, and the working temperature is-40-80 ℃. The ECU has the core CPU with calculation and control functions, and when the engine runs, the CPU collects the signals of the sensors for calculation and converts the calculation result into control signal to control the work of the controlled object. It also exercises control over memory (ROM/FLASH/EEPROM, RAM), input/output interfaces (I/O) and other external circuitry; the program stored in the ROM is programmed on the basis of data obtained by precise calculation and a large number of experiments, and this intrinsic program is constantly compared and calculated with the signals of the sensors acquired while the engine is operating. The results of the comparison and calculation are used to control various parameters of the engine such as ignition, air-fuel ratio, idle speed, exhaust gas recirculation, etc.

The pedal feel simulator 1 according to the embodiment of the invention is described in detail below with reference to fig. 1 to 7. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting.

As shown in fig. 1 to 7, a vehicle includes a pedal 2 according to a pedal feel simulator 1 of a vehicle according to an embodiment of the present invention, and the pedal feel simulator 1 includes a housing 10, a slider-crank mechanism 20, a driving member 30, a moving push rod 40, a first elastic member 50, a spring seat 60, a second elastic member 70, a dust cover 80, a link assembly 90, and a mounting case 100.

Specifically, as shown in fig. 2, 4 and 7, the housing 10 may be formed in a barrel-shaped structure, the housing 10 has an open end 11 and a closed end 12, the open end 11 has a throat portion 111, the caliber of the throat portion 111 is smaller than the diameter of the middle portion of the housing 10, the closed end 12 has a through central through hole 121, and the slider 23 is located in the housing 10.

As shown in fig. 2, 4 and 7, the mounting case 100 may be formed in a cylindrical shape, an open opening 110 is formed on the mounting case 100, the open opening 110 is connected with the open end 11 of the case, and the inside of the mounting case 100 communicates with the inside of the housing 10. A driving part 30 is located within the mounting case 100, and the driving part 30 may include a motor 31, an input gear 32, and an output gear 33. The motor 31 has a motor shaft 310, an input gear 32 is provided on the motor shaft 310 of the motor 31 to be driven to rotate by the motor 31, an output gear 33 is engaged with the input gear 32, and the diameter of the input gear 32 is smaller than that of the output gear 33.

As shown in fig. 5 and 7, one end of the crank 21 is connected to the output gear 33, the other end of the crank 21 is pivotally connected to one end of the connecting rod 22, the other end of the connecting rod 22 extends into the housing 10 from the open end 11, the connecting rod 22 can shuttle at the intersection of the mounting housing 100 and the housing 10, one part of the connecting rod 22 is located in the mounting housing 100, and the other part of the connecting rod 22 is located in the housing 10.

As shown in fig. 1 and 6, the driving part 30 may further include a bearing assembly 200, the bearing assembly 200 includes two bearing seats 210, two bearings 220 and a rotating shaft 230, the two bearing seats 210 are disposed on the mounting housing 100 in a penetrating manner, the two bearing seats 210 are symmetrically distributed, one bearing 220 is disposed in each bearing seat 210, the two bearings 220 are respectively sleeved at two ends of the rotating shaft 230, and the output gear 33 is sleeved on the rotating shaft 230. The bearing assembly 200 may be used to support the output gear 33, the bearing housing 210 may support the bearing 220, the bearing 220 is used to support the rotation shaft 230, the normal working position and the rotation precision of the rotation shaft 230 are maintained, the friction loss of the rotation shaft 230 is reduced, and the bearing housing 210 may also cooperate with the mounting case 100 to play roles of sealing, dust-proof, water-proof, and the like.

As shown in fig. 7, the slider 23 may be formed in a cylindrical shape with a closed end, the closed end has an annular protrusion 231, the annular protrusion 231 extends along a circumferential direction of the cylindrical slider 23, a part of the connecting rod 22 extending into the housing 10 may extend into the slider 23 from an open end of the slider 23, an end of the connecting rod 22 extending into the slider 23 may be provided with a through hole, the through hole may penetrate through the connecting rod 22, a connecting shaft 24 may penetrate through the through hole, two ends of the connecting shaft 24 may extend to a circumferential wall penetrating through the slider 23, two positioning members 25 may be provided, and two positioning members 25 may respectively fix two ends of one connecting shaft 24. The positioning member 25 may be formed in a ring shape, and the positioning member 25 may be fitted over an end of the connecting shaft 24 and engaged with the connecting shaft 24. The first elastic element 50 is located in the housing 10, the first elastic element 50 may be sleeved on the slider 23, one end of the first elastic element 50 may abut against the protrusion 231, and the other end of the first elastic element 50 may abut against the throat 111. The first elastic member 50 has a gap with the inner peripheral wall of the housing 10, the first elastic member 50 can be compressed or stretched, and the slider 23 can slide relative to the housing 10. The link 22 includes a body portion 222 and a link cover 221, the body portion 222 and the link cover 221 are connected by a link bolt 223 and a link nut 224, and function to connect the crank 21 and the moving push rod 40, convert the rotational motion of the crank 21 into the linear motion of the moving push rod 40, and convert the torque of the crank 21 into the force acting on the moving push rod 40 as one of the simulation elements of the pedal force.

As shown in fig. 6-7, one end of the moving push rod 40 passes through the central through hole 121 and is connected to one end of the slider 23 provided with the protrusion 231. The link assembly 90 includes a first link 91, a second link 92, and an adjustment nut 93. Second connecting piece 92 can be equipped with the screw hole, the one end of first connecting piece 91 can with remove push rod 40 joint, be equipped with the screw thread on the periphery wall of the other end of first connecting piece 91, the other end of first connecting piece 91 can wear to establish in the screw hole with second connecting piece 92 threaded connection, adjusting nut 93 cover is established at the other end of first connecting piece 91, adjusting nut 93 and first connecting piece 91 threaded connection, adjusting nut 93 is located between removal push rod 40 and the second connecting piece 92, second connecting piece 92 is connected with footboard 2. The crank 21 can be subjected to forces that convert the rotational motion of the output gear 33 into linear motion that moves the push rod 40.

As shown in fig. 2-4, spring seat 60 may be located outside housing 10, spring seat 60 is opposite to closed end 12, movable push rod 40 may be clamped or fixedly connected to spring seat 60, second elastic element 70 is located between housing 10 and spring seat 60, second elastic element 70 may be sleeved on movable push rod 40, one end of second elastic element 70 may abut against closed end 12, and the other end of second elastic element 70 may abut against spring seat 60. The dust cover 80 may be formed in a cylindrical shape, the dust cover 80 may be sleeved on the second elastic member 70, one end of the dust cover 80 may be connected to the housing 10, the other end of the dust cover 80 may be connected to the spring seat 60, the housing 10, the dust cover 80, and the spring seat 60 may define a chamber, and the second elastic member 70 may be located in the chamber. The dust cover 80 has wrinkles, and the dust cover 80 is stretchable in the deformation direction of the second elastic member 70.

In order to improve the effective braking of the automobile, the pedal feeling simulator 1 of the embodiment of the invention replaces the pedal structure of the traditional hydraulic or pneumatic braking system with brake-by-wire. The brake-by-wire has the characteristics of high response speed, high control precision, good brake performance, flexible arrangement and the like, and can be integrated with the electronic control unit 3 of the vehicle to provide flexible and variable brake force for the vehicle. In the related art, a brake pedal and a brake wheel cylinder are directly connected through mechanical elements such as a hydraulic pipeline, and a driver depresses the brake pedal to enable an automobile to obtain corresponding braking force. In the brake-by-wire system, because the hydraulic or mechanical connection between the brake pedal and the brake is cancelled, the driver can not directly sense the brake reaction force fed back to the brake pedal during braking, thereby avoiding poor braking feeling of the pedal 2 caused by the braking feeling of the traditional braking system and providing good braking pedal feeling for the driver. The braking feeling is a comprehensive feeling that includes a pedal braking feeling, which is the most important component, among factors such as the vehicle braking deceleration felt by the driver, the audible braking noise, and the visual vehicle deceleration. The pedal brake feeling of the invention is that the driver gets feedback after stepping down the pedal 2 and gets rid of intermediate variables (such as hydraulic pressure, air pressure and the like), and a pure mechanical mechanism is used for simulating the pedal feeling in the driving process, thereby improving the response speed and the mechanical performance of a vehicle brake system.

The working principle of the pedal feel simulator 1 is as follows: the design goal of pedal force is to simulate the pedal characteristics through the spring and some control method. Since most of the elastic members have linear characteristics, and the pedal characteristics sometimes need to be nonlinear, the pedal feel simulator 1 according to the embodiment of the present invention simulates a pedal reaction force by combining the elastic members with the motor 31, that is, comprehensively simulates a pedal force by using the elastic force of the elastic members and the driving force of the motor 31. The first elastic element 50 and the second elastic element 70 in the present embodiment are designed in parallel (the first elastic element 50 is in a compressed state or a state to be compressed in an initial state, and the first elastic element 50 and the second elastic element 70 are designed in series). The driving force of the motor 31 directly acts on the moving push rod 40 through the crank slider mechanism 20, so that the rigidity of the pedal 2 of the pedal feel simulator 1 is adjustable, the first elastic member 50 and the second elastic member 70 provide a base pedal reaction force to ensure the brake system operates with the "brake feel" of the pedal 2, and the motor 31, the first elastic member 50 and the second elastic member 70 together provide a target pedal force to compensate for the remaining portion between the base pedal force and the target pedal force. The first elastic member 50 and the second elastic member 70 are in relation to the motor 31 such that when the motor 31, the input gear 32, the output gear 33, the slider-crank mechanism 20, etc. are out of order and cannot move, the first elastic member 50 and the second elastic member 70 can still move, and the detection device 4 can sense the action of the pedal 2, so as to continue to perform effective braking and maintain a normal braking function.

When a driver needs to perform a braking function during the running of the vehicle, the driver steps on the pedal 2, moves the push rod 40 leftwards (leftwards as shown in fig. 1), pushes the spring seat 60 leftwards (leftwards as shown in fig. 1) to move and compress the second elastic element 70, and completes an initial pedal stroke S1, and in the process of S1, the braking rigidity of the pedal feel simulator 1 is K1. Subsequently, the moving push rod 40 continues to move leftward (leftward as viewed in fig. 1), and the push slider 23 moves leftward (leftward as viewed in fig. 1) to compress the first elastic member 50, completing the main pedal stroke S2, and the rigidity of the pedal feel simulator 1 during S2 is K2. Due to the compression deformation of the second elastic element 70 and the first elastic element 50, the movable push rod 40 is subjected to a reverse acting force, the motor 31 drives the crank slider mechanism 20 after increasing the distance and reducing the speed through the cooperation of the input gear 32 and the output gear 33, provides an assisting force for the movable push rod 40, reduces the reverse acting force applied to the movable push rod 40, and enables the movable push rod 40 to obtain a proper reverse acting force, wherein the reverse acting force is a brake pedal force, so that a target value of the pedal force and the pedal stroke is simulated. When the driver feels that the pedal is soft or hard, the action of the motor 31 can be changed through the electronic control unit 3, and further the stress of the moving push rod 40 is changed, so that the driver can obtain better pedal feeling. When the first elastic member 50 or the motor 31 fails to move due to some reason, the second elastic member 70 can still move, and the pedal stroke can be detected by the detection device 4, so that the brake is continuously applied, and the brake function is maintained.

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, the pedal feel simulator comprising:

a housing;

the crank sliding block mechanism comprises a crank, a connecting rod and a sliding block, two ends of the connecting rod are respectively connected with the crank and the sliding block, and the sliding block is arranged in the shell in a reciprocating manner;

the driving component is connected with one end of the crank so as to drive the crank to rotate;

one end of the movable push rod is matched with the sliding block to drive the sliding block to move, and the other end of the movable push rod is suitable for being connected with the pedal;

the first elastic piece is arranged in the shell, the first end of the first elastic piece is positioned in the shell, and the second end of the first elastic piece is matched with the sliding block;

the slider is the cavity spare, the connecting rod stretches into in the slider, slider-crank mechanism still includes connecting axle and setting element, the connecting axle is worn to establish on the connecting rod just at least one end of connecting axle is stretched out the slider, the setting element with stretching out of connecting axle the tip cooperation of slider is in order to incite somebody to action the connecting axle is fixed a position on the slider.

2. The vehicle pedal feel simulator of claim 1, further comprising a spring seat provided outside the housing and on the moving push rod so as to move with the moving push rod, and a second elastic member having both ends respectively stopped against the housing and the spring seat.

3. The vehicle pedal feel simulator of claim 2, further comprising a retractable dust cover that covers the outside of the second resilient member and both ends of the dust cover are provided on the spring seat and the housing, respectively.

4. The pedal feel simulator of a vehicle according to claim 1, further comprising a link assembly having an adjustable length, both ends of the link assembly being connected to the other end of the moving push rod and the pedal, respectively.

5. The vehicle pedal feel simulator of claim 4, wherein the linkage assembly includes:

the first end of the first connecting piece is connected with the movable push rod, and the second end of the first connecting piece is provided with external threads;

the first end of the second connecting piece is sleeved outside the first connecting piece and is in threaded fit with the external thread, and the second end of the second connecting piece is suitable for being connected with the pedal;

and the adjusting nut is sleeved on the first connecting piece and is in threaded fit with the external thread.

6. The vehicle pedal feel simulator of claim 1 further comprising a mounting housing disposed on the outer shell, the drive member being disposed within the mounting housing.

7. The pedal feel simulator of the vehicle according to any one of claims 1 to 6, wherein the drive member includes:

a motor;

the input gear is arranged on a motor shaft of the motor so as to be driven by the motor to rotate;

the output gear is meshed with the input gear, and one end of the crank is arranged on the output gear to be driven by the output gear to rotate.

8. The pedal feel simulator of the vehicle of claim 7, wherein the diameter of the input gear is smaller than the diameter of the output gear.

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 according to any one of claims 1 to 8, the shell is arranged on the vehicle body, the movable push rod is connected with the pedal, and the driving part is connected with the electronic control unit;

and the detection device is used for detecting the stroke of the pedal and is connected with the electronic control unit.