Pedal assembly for dry brake device, brake system and vehicle

Abstract

The utility model provides a pedal assembly for a dry brake device, a brake system and a vehicle. The pedal assembly comprises a push rod and a piston, one end of the push rod is used for receiving pedal driving force, the piston comprises a containing groove, the containing groove is used for containing the other end of the push rod, the groove wall of the containing groove comprises an annular groove, and a check ring with a circumferential notch is embedded into the annular groove. The length of the circumferential notch of one check ring is smaller than half of the circumferential length of one check ring. According to the pedal assembly, movement of the push rod in the containing groove is limited through the check ring embedded into the annular groove, so that the reliability of the pedal assembly is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a pedal assembly for a dry brake device, a brake system and a vehicle. Background Art

[0002] The vehicle receives the user's input operation through the pedal assembly, thereby sensing the user's braking intention and driving the brake device to brake the vehicle. The dry brake device has the characteristics of simple structure and fast response speed. In order to ensure safety, it is necessary to improve the reliability of the pedal assembly and the dry brake device to prevent failure of the brake caused by faults. Utility Model Content

[0003] The present application provides a pedal assembly for a dry brake device, a brake system and a vehicle, wherein a displacement range of a push rod is limited by a retaining ring to improve the reliability of the pedal assembly.

[0004] In a first aspect, the present application provides a pedal assembly for a dry brake device, the pedal assembly comprising a push rod and a piston, one end of a push rod being used to receive a pedal driving force, a piston comprising a receiving groove, a receiving groove being used to receive the other end of a push rod, wherein a groove wall of one of the receiving grooves comprises an annular groove, an annular groove being used to embed a retaining ring with a circumferential notch, and a length of a circumferential notch of a retaining ring being less than half of a circumferential length of a retaining ring.

[0005] The pedal assembly provided in the present application receives a pedal driving force through one end of a push rod, and pushes the bottom of a receiving groove through the other end of the push rod to drive a piston to move in the pedal assembly. The pedal assembly outputs a control signal based on the movement of a piston.

[0006] During a piston resetting process, the pedal assembly provided in the present application limits the displacement of a push rod relative to a receiving groove through a retaining ring to limit the other end of a push rod within a receiving groove to prevent a push rod from falling off relative to a receiving groove.

[0007] Since the dry brake device does not have a sealed oil circuit, a push rod and a piston do not need a sealed connection, so the pedal assembly of the present application can use a retaining ring with a circumferential notch to limit a push rod. Among them, the outer edge of a retaining ring is used to be embedded in an annular groove, the inner diameter of a retaining ring is smaller than the maximum outer diameter of the other end of a push rod, the arc of a retaining ring along the circumference is at least greater than 180°, and it can be installed in the annular groove after the circumferential notch is closed. Thus, along the direction of movement of the other end of a push rod toward the notch of a receiving groove, a retaining ring forms a certain contact area with a receiving groove and the other end of a push rod respectively, and the limiting structure of a retaining ring on the other end of a push rod is relatively stable. During the long-term operation of the pedal assembly of the present application, the other end of a push rod can be kept contained in a receiving groove, thereby improving the reliability of the pedal assembly of the present application.

[0008] In one implementation, a retaining ring can be made of metal, and after the circumferential notch of a retaining ring is closed under the action of a circumferential driving force, it is easy to install in an annular groove. The pedal assembly provided by the present application also controls the circumferential length of a circumferential notch so that the circumferential length of a retaining ring is greater than 2 / 3 of the circumferential length of an annular groove, so as to ensure the effective contact area between a retaining ring and the other end of a push rod, thereby ensuring the reliability of the pedal assembly of the present application.

[0009] In one implementation, along the circumference of a push rod, the length of a circumferential notch of a retaining ring is greater than 1 / 5 of the circumferential length of the retaining ring.

[0010] In this implementation, the pedal assembly controls the length of the circumferential notch of a retaining ring, so that the circumferential notch of the retaining ring is closed and then installed in an annular groove.

[0011] In one implementation, along the axial direction of a push rod, the groove wall of an accommodating groove is divided into two sections by an annular groove, one section is arranged between the groove opening of an accommodating groove and the other section, and the inner diameter of one section is larger than the inner diameter of the other section and smaller than the outer diameter of a retaining ring.

[0012] In this implementation, the axis of a receiving groove and the axis of an annular groove are both coincident with the axis of a push rod, and along the radial direction of a push rod, the diameter of the groove bottom of an annular groove is larger than the inner diameter of a receiving groove to fix a retaining ring. The inner diameter of a section of a receiving groove close to the groove opening is larger than the inner diameter of another section close to the groove bottom, so that a retaining ring is easily installed into an annular groove from the groove opening of a receiving groove.

[0013] In one implementation, the inner diameter of another section of an accommodating groove is greater than the inner diameter of a retaining ring.

[0014] In this implementation, along the axial direction of a push rod, the inner diameter of an end face of a retaining ring facing the bottom of a receiving groove is smaller than the inner diameter of another section of an receiving groove, and the end face is partially exposed in an annular groove along the axial direction of a push rod, and the partial area of ​​the end face exposed in an annular groove is used to limit the movement of the other end of a push rod, thereby improving the reliability of the pedal assembly of the present application.

[0015] In one implementation, a section of an accommodating groove along the axial direction of a push rod and away from an end of an annular groove includes a tapered groove wall, and an inner diameter of the tapered groove wall gradually decreases from a notch of an accommodating groove to an annular groove.

[0016] In this implementation, the axis of a tapered groove wall, the axis of a section of a receiving groove, and the axis of another section of a receiving groove all coincide with the axis of a push rod. Along the axial direction of a push rod, another section of a receiving groove, an annular groove, a section of a receiving groove, and a tapered groove wall are arranged in sequence. The inner diameter of an end of a tapered groove wall away from an annular groove along the axial direction of a push rod is greater than or equal to the outer diameter of a retaining ring. In the process of embedding a retaining ring into an annular groove, a retaining ring can be placed into a receiving groove from a notch of a receiving groove along the axial direction of a push rod, and slide toward an annular groove along the axial direction of a push rod under the action of an external axial thrust. A tapered groove wall is used to guide a retaining ring to slide toward an annular groove and adjust the posture of a retaining ring, so as to assist a retaining ring to be smoothly installed in an annular groove and improve the installation efficiency of the pedal assembly of the present application.

[0017] In one implementation, the inclination angle of a tapered groove wall relative to the axis of a push rod ranges from 10° to 30°.

[0018] In this implementation, the pedal assembly controls the inclination range of a conical groove wall relative to the axis of a push rod to avoid a situation where the inclination of a conical groove wall is too small, resulting in an excessively large axial dimension of a receiving groove along a push rod, thereby affecting the arrangement of other components. At the same time, it is also avoided that the inclination of a conical groove wall is too large, thereby affecting the guiding function of a conical groove wall when installing a retaining ring.

[0019] In one implementation, a retaining ring includes two through holes, which are respectively located at two ends of a retaining ring along the circumference of a push rod, and the two through holes are used to receive a circumferential driving force to close a circumferential gap of a retaining ring, wherein when the circumferential gap is closed along the circumference of a push rod, the outer diameter of a retaining ring is smaller than the inner diameter of a section of a accommodating groove, and the inner diameter of a retaining ring is larger than the outer diameter of a push rod.

[0020] In this implementation, a through hole is provided at both ends of a retaining ring along the circumferential direction, so that the circumferential notch of a retaining ring can be closed by a circumferential driving force, so that the radial dimension of a retaining ring can be reduced and then the retaining ring can be embedded in an annular groove.

[0021] In one implementation, when the circumferential notch of a retaining ring is closed, the maximum distance between each through hole and the axis of an accommodating groove is less than the radius of a section of an accommodating groove.

[0022] In one implementation, the other end of a push rod includes a ball head, and the ball head is used to push a piston to move along a first direction through a groove bottom of a receiving groove.

[0023] In this implementation, the first direction is parallel to the axial direction of a push rod, and a ball head is used to push a piston to slide along the axial direction of a push rod through the bottom of a receiving groove under the action of a pedal driving force. Along the radial direction of a push rod, the maximum outer diameter of a ball head is greater than the inner diameter of a retaining ring, and a retaining ring limits the axial movement of a push rod by blocking the axial movement of a ball head.

[0024] In one implementation, the groove bottom of an accommodating groove is conical, and the inner diameter of the groove bottom of an accommodating groove gradually increases toward an annular groove along the axial direction of a push rod.

[0025] In this implementation, the axis of the bottom of a receiving groove coincides with the axis of a receiving groove. When the user performs a braking operation, the pedal driving force of the user is used to push a ball head of a push rod to abut against the bottom of a receiving groove, and a push rod is rotated and offset relative to a receiving groove under the driving force of the foot pedal. The bottom of a conical receiving groove is used to cooperate with the rotational offset of a ball head, and reliably receive the pedal driving force of a ball head to drive a piston to slide along a first direction. The bottom of a conical receiving groove is convenient for a ball head to cooperate and reliably transmit the pedal driving force. The bottom of a conical receiving groove is easy to process. By improving the surface roughness of a receiving groove, the wear of a ball head can be reduced and the noise can be controlled.

[0026] In one implementation, the taper of the bottom of an accommodating groove is greater than or equal to 100°.

[0027] In this implementation, under the premise of utilizing the bottom of a receiving groove to ensure that the first direction is parallel to the axial direction of a receiving groove, the pedal assembly controls the taper range of the bottom of a receiving groove to avoid the situation where the axial dimension of the bottom of a receiving groove along a push rod is too large due to the taper of the bottom of a receiving groove being too small, thereby affecting the arrangement of other components.

[0028] In one implementation, the taper of the bottom of an accommodating groove is 120°.

[0029] In one implementation, a bottom of a receiving tank includes a surface coating containing a sound-absorbing material.

[0030] In one implementation, a receiving groove is used to receive an elastic member, and a retaining ring along the axial direction of a push rod is used to push a ball head at the other end of a push rod to abut against the bottom of a receiving groove through an elastic member.

[0031] In this implementation, the axis of an elastic member coincides with the axis of a push rod, and the two ends of an elastic member along the axis of a push rod face a ball head and a retaining ring respectively. An elastic member is used to provide elastic force to push a ball head to abut against the bottom of a receiving groove, eliminate the gap between a ball head and the bottom of a receiving groove, so that the stroke of the user's braking operation remains consistent, and eliminate the noise that may be generated by the idle stroke of a ball head.

[0032] In one implementation, along the radial direction of a push rod, an elastic member is used to be sleeved outside a push rod, an outer diameter of the elastic member is larger than an inner diameter of a retaining ring, and an inner diameter of the elastic member is smaller than an outer diameter of a ball head.

[0033] In this implementation, along the axial direction of a push rod, the projection of an elastic member on a ball head is accommodated in the ball head, the projection of an elastic member on a retaining ring is at least partially accommodated in the end surface of a retaining ring facing the ball head, and an elastic member is used to limit the radial displacement of a push rod when a ball head is rotationally offset relative to a receiving groove.

[0034] In one implementation, an elastic member is tapered, and an outer diameter of one end of the elastic member facing a retaining ring along the axial direction of a push rod is larger than an outer diameter of the other end.

[0035] In this implementation, along the axial direction of a push rod from an annular groove to the bottom of a receiving groove, the outer diameter of an elastic member gradually decreases. The elastic force of a conical elastic member gradually increases during the compression process, providing a better feedback effect to the user.

[0036] In one implementation, after the pedal assembly is installed, an elastic member is in a pre-stressed state.

[0037] In this implementation, an elastic member always provides elastic force for a ball head of a push rod to abut against the bottom of a receiving groove, thereby eliminating the gap between the ball head and the bottom of the receiving groove.

[0038] In one implementation, the pre-compression force of an elastic member ranges from 30N to 80N.

[0039] In one implementation, the stiffness of an elastic member ranges from 10 N / mm to 20 N / mm.

[0040] In one implementation, during a piston resetting process, the bottom of a receiving groove pushes an elastic member through a ball head to squeeze a gasket toward a retaining ring, wherein along the radial direction of a push rod, a gasket is used to be sleeved outside a push rod, and the outer diameter of a gasket is larger than the inner diameter of an elastic member and larger than the inner diameter of a retaining ring.

[0041] In this implementation, the pedal assembly further includes a washer, the axis of which coincides with the axis of a push rod, and along the axial direction of the push rod, two sides of the washer are used to abut against an elastic member and a retaining ring respectively. The washer is used to evenly disperse the force of a ball head acting on a retaining ring through an elastic member, so as to prevent the retaining ring from being damaged due to excessive local force and thus affecting the service life of the pedal assembly.

[0042] In one implementation, a washer is used to cover a circumferential notch of a retaining ring along the circumference of a push rod.

[0043] In this implementation, a washer is used to limit the axial movement of an elastic member to prevent the axial position of an elastic member from being affected by uneven force on the portion of the elastic member that faces the circumferential notch of a retaining ring, thereby making the force on the retaining ring more uniform.

[0044] In one implementation, the thickness of a washer along the axial direction of a push rod is greater than or equal to the thickness of a retaining ring.

[0045] In this implementation, the pedal assembly increases the thickness of a washer to improve the strength of a washer, ensuring that the washer evenly transmits the elastic force of an elastic member to a retaining ring. On the other hand, the thickness of a washer is greater than the thickness of a retaining ring, and the failure position of the pedal assembly can be guided to a retaining ring. A retaining ring can be implemented using standard parts, and when a retaining ring fails due to shear force, it is convenient to replace and maintain the pedal assembly.

[0046] In one implementation, a receiving groove is used to receive a bushing, and a bushing includes a ring and an axial protrusion. During a piston reset process, the bottom of a receiving groove pushes a ring through a ball head to squeeze an elastic member toward a retaining ring, wherein an axial protrusion along the radial direction of a push rod is used to surround an elastic member, and the inner diameter of an axial protrusion is smaller than the outer diameter of a washer. One end of an axial protrusion along the axial direction of a push rod is used to connect to an end surface of a ring facing a retaining ring, and the distance between the other end of an axial protrusion and a washer is smaller than the maximum compression amount of an elastic member.

[0047] In this implementation, the axis of a bushing coincides with the axis of a push rod. Along the axial direction of a push rod, a ball head, a ring, an axial protrusion, a washer, and a retaining ring are arranged in sequence. The two ends of an elastic member are used to abut a ring and a washer respectively. An axial protrusion is used to space an elastic member from the groove wall of a receiving groove to protect the side wall of an elastic member. The distance between the other end of an axial protrusion and a washer is less than the maximum compression amount of an elastic member, which can protect an elastic member from being compressed and failing, thereby improving the reliability of the pedal assembly.

[0048] In one implementation, along the axial direction of a push rod, the distance between the other end of an axial protrusion and a washer ranges from 0.5 mm to 1 mm.

[0049] In one implementation, a gap between an axial protrusion and an elastic member along a radial direction of a push rod is smaller than a gap between an axial protrusion and a groove wall of an accommodating groove.

[0050] In this implementation, since a push rod may rotate and deviate relative to an accommodating groove, an elastic member may be radially deformed. An axial protrusion can limit an elastic member in the radial direction of a push rod, guide an elastic member to reset in the radial direction, and prevent an elastic member from directly contacting a groove wall of an accommodating groove, thereby protecting the side wall of an elastic member.

[0051] In one implementation, the inner hole diameter of a ring is smaller than the inner hole diameter of a washer along the radial direction of a push rod.

[0052] In this implementation, a push rod is rotated and offset relative to a receiving groove under the drive of the foot pedal, and the radial offset of the push rod gradually increases from the groove bottom to the groove opening of the receiving groove. In the radial direction of the push rod, the gap between the push rod and a ring is small, and the gap between the push rod and a washer is large, so that the washer can avoid interfering with the push rod in the radial direction of the push rod under the premise of ensuring that an elastic member is respectively in contact with a ring and a washer.

[0053] In one implementation, the pedal assembly includes a pedal box and a pressure sensor, wherein the pedal box includes a piston chamber, the piston chamber is used to accommodate a piston, wherein the other end along the axial direction of a push rod is used to push a piston to slide in a piston chamber. A pressure sensor is used to detect the pressure change in a piston chamber and output a control signal to brake the vehicle.

[0054] In this implementation, the axis of a piston cavity coincides with the axis of a push rod, the outer diameter of a piston is equal to the inner diameter of a piston cavity, and along the axial direction of a push rod, a piston is used to cooperate with a piston cavity to form a sealed space on the side of a piston away from an opening of a piston cavity, and a pressure sensor is used to connect a sealed space. After the user performs a braking operation, a piston compresses a sealed space through a pedal driving force transmitted by a push rod, and the pressure inside the sealed space increases. A pressure sensor is used to detect the pressure change inside the sealed space to output a control signal to brake the vehicle.

[0055] In one implementation, the outer peripheral wall of a piston includes another annular groove, and the other annular groove is used to accommodate a sealing ring, and the sealing ring is used to seal the gap between a piston and a cavity wall of a piston cavity.

[0056] In this implementation, the axis of a sealing ring coincides with the axis of a push rod. Along the radial direction of a push rod, the outer circumference of a sealing ring is used to abut against the cavity wall of a piston cavity, and the inner circumference of a sealing ring is used to abut against the groove bottom of another annular groove to cover the gap between the outer circumference wall of a piston and the cavity wall of a piston cavity.

[0057] In one implementation, the pedal assembly includes a slider and a displacement sensor, wherein one slider is used to be fixedly connected to the outer peripheral wall of a piston. One displacement sensor is used to be fixedly connected to a pedal box, and one displacement sensor is used to detect the displacement of one slider and output another control signal to brake the vehicle, and the other control signal forms a safety redundancy with one control signal.

[0058] In this implementation, a displacement sensor detects the displacement of a piston through a slider, and a pressure sensor detects the pedal driving force transmitted to a piston through a sealed space. The pedal assembly is used to form safety redundancy based on a control signal of a pressure sensor and another control signal of a displacement sensor, so that when one of the pressure sensor and the displacement sensor fails, the pedal assembly can brake the vehicle based on the output control signal of the other one of the pressure sensor and the displacement sensor, thereby improving the reliability of the pedal assembly.

[0059] In a second aspect, the present application provides a braking system comprising at least one electronic mechanical braking device and a pedal assembly provided in the first aspect, wherein each electronic mechanical braking device is used to brake a wheel in response to a control signal output by a pedal assembly.

[0060] In a third aspect, the present application provides a vehicle, comprising a plurality of wheels, and the braking system provided in the second aspect, wherein each electronic mechanical braking device in the braking system is used to brake one wheel.

[0061] Because the pedal assembly provided in the first aspect of the present application improves reliability, the braking system provided in the second aspect of the present application and the vehicle braking provided in the third aspect are more reliable and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0063] Figure 1 A schematic diagram of the appearance structure of a vehicle provided in an embodiment of the present application;

[0064] Figure 2 A schematic diagram of a process flow of a braking device for a vehicle provided in an embodiment of the present application;

[0065] Figure 3 A schematic diagram of the structure of the wheel of a vehicle provided in an embodiment of the present application;

[0066] Figure 4 This is a schematic diagram of the main structure of the pedal assembly provided in an embodiment of the present application;

[0067] Figure 5 A schematic diagram of the partial appearance structure of the pedal assembly provided in an embodiment of the present application;

[0068] Figure 6 A schematic diagram of a partial exploded structure of a pedal assembly provided in an embodiment of the present application;

[0069] Figure 7 A schematic diagram of a partial cross-sectional structure of a pedal assembly provided in an embodiment of the present application;

[0070] Figure 8 A schematic diagram of the working process of the pedal assembly provided in an embodiment of the present application;

[0071] Fig. 9 A schematic diagram of the appearance structure of the internal components of the piston chamber in the pedal assembly provided in the embodiment of the present application;

[0072] Fig.10 A schematic cross-sectional structure diagram of the internal components of the piston chamber in the pedal assembly provided in an embodiment of the present application;

[0073] Fig.11 A schematic diagram of the side structure of the internal components of the piston chamber in the pedal assembly provided in an embodiment of the present application;

[0074] Fig.12A schematic diagram of a partially enlarged structure of the internal components of the piston chamber in the pedal assembly provided in an embodiment of the present application;

[0075] Fig.13 A schematic diagram of a partial cross-sectional structure of a piston of a pedal assembly provided in an embodiment of the present application;

[0076] Fig.14 A schematic diagram of the appearance structure of a push rod of a pedal assembly provided in an embodiment of the present application;

[0077] Fig.15 A schematic diagram of the appearance structure of the internal components of the receiving groove in one embodiment of the pedal assembly provided in the embodiment of the present application;

[0078] Fig.16 A schematic cross-sectional structure diagram of components inside a receiving groove in one embodiment of a pedal assembly provided in an embodiment of the present application;

[0079] Fig.17 A schematic diagram of the exploded structure of the internal components of the receiving groove in one embodiment of the pedal assembly provided in the embodiment of the present application;

[0080] Fig.18 A schematic cross-sectional structure diagram of components inside a receiving groove in another embodiment of a pedal assembly provided in an embodiment of the present application;

[0081] Fig.19 A schematic diagram of the appearance of an elastic member in another embodiment of a pedal assembly provided in an embodiment of the present application;

[0082] Fig. 20 A schematic diagram of the appearance structure of a bushing of a pedal assembly provided in an embodiment of the present application;

[0083] Fig.21 A schematic diagram of a partial exploded structure of a pedal assembly provided in an embodiment of the present application. DETAILED DESCRIPTION

[0084] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0085] The present application provides a pedal assembly for a dry brake device, the pedal assembly comprising a push rod and a piston, one end of the push rod being used to receive a pedal driving force, the piston comprising a receiving groove, the receiving groove being used to receive the other end of a push rod, wherein a groove wall of one of the receiving grooves comprises an annular groove, the annular groove being used to embed a retaining ring with a circumferential notch, the length of the circumferential notch of the retaining ring being less than half of the circumferential length of the retaining ring.

[0086] The pedal assembly for a dry brake device provided in the present application uses a retaining ring to limit the push rod when the other end of a push rod slides toward the bottom of a groove away from a receiving groove under the action of inertia, thereby improving the reliability of the pedal assembly of the present application.

[0087] The present application provides a braking system, comprising at least one electronic mechanical braking device and one of the above-mentioned pedal assemblies, wherein each electronic mechanical braking device is used to brake a wheel in response to a control signal output by a pedal assembly.

[0088] The present application provides a vehicle, the vehicle comprising a plurality of wheels, and the above-mentioned braking system, wherein each electronic mechanical braking device in the braking system is used to brake a wheel. The braking device is used to brake the wheel in response to a control signal of a pedal assembly. The braking of the vehicle of the present application is more reliable and safer.

[0089] See also Figure 1 The schematic diagram of the appearance structure of the vehicle provided in the embodiment of the present application is shown.

[0090] like Figure 1 As shown, the vehicle provided in the present application includes a vehicle body, a plurality of wheels 1001, a power device and a braking system provided in the present application. The braking system provided in the present application includes a plurality of braking devices 1002 and a pedal assembly 100. The plurality of wheels 1001 are respectively connected to the vehicle body for rotation. The power device is used to be accommodated inside the vehicle body and is connected to at least some of the wheels 1001 in a transmission manner. The power device drives at least some of the wheels 1001 to rotate relative to the vehicle body to drive the vehicle to travel. Each wheel 1001 includes a brake disc 1003, which is coaxially fixed to the hub of the wheel 1001, and the brake disc 1003 is used to rotate synchronously with the wheel 1001 relative to the vehicle body.

[0091] In the braking system provided in the present application, a plurality of braking devices 1002 are respectively fixed to the vehicle body. Figure 1In the schematic diagram, the brake device 1002 is used to provide braking force for the wheel 1001. In one embodiment, the number of the brake devices 1002 is the same as the number of the wheels 1001, one brake device 1002 is correspondingly provided with one brake disc 1003, and each brake device 1002 is used to cooperate with each brake disc 1003 to provide braking force for the corresponding wheel 1001 respectively.

[0092] The pedal assembly 100 provided in the present application is accommodated in the vehicle body, and the pedal assembly 100 is communicatively connected with each braking device 1002. The pedal assembly 100 is used to receive the user's braking operation and output a control signal, and each braking device 1002 is used to receive the control signal of the pedal assembly 100, and provide braking force to the corresponding brake disc 1003 based on the control signal, thereby achieving braking of the corresponding wheel 1001.

[0093] In one embodiment, the vehicle includes a controller, which is used to receive a control signal output by the pedal assembly 100, and control each braking device 1002 to brake its corresponding wheel 1001 in response to the received control signal.

[0094] In one embodiment, the brake device 1002 includes a brake controller, which is used to receive a control signal output by the pedal assembly 100, and in response to the received control signal, controls the corresponding brake device 1002 to brake the wheel 1001. In this embodiment, the pedal assembly 100 is also used to output control signals to the brake controllers of each brake device 1002 respectively.

[0095] In one embodiment, the brake device 1002 is an electro-mechanical brake (EMB).

[0096] See also Figure 2 and Figure 3 ,in Figure 2 A schematic diagram of a process flow of a braking device 1002 for a vehicle provided in an embodiment of the present application, Figure 3 A schematic diagram of the structure of the wheels of a vehicle provided in an embodiment of the present application.

[0097] like Figure 2 and Figure 3As shown, the brake device 1002 includes a brake motor 1004 and a brake 1005, the brake 1005 is used to be fixedly connected to the vehicle body, the controller of the brake motor 1004 is used to receive the control signal output by the pedal assembly 100, and output the braking force to the brake 1005 based on the received control signal, and the brake 1005 can brake the brake disc 1003 under the action of the braking force output by the brake motor 1004. In one embodiment, the controller of the brake motor 1004 is used to receive the control instruction of the controller of the vehicle. In another embodiment, the controller of the brake motor 1004 is the brake controller of the brake device 1002.

[0098] In one embodiment, the brake 1005 includes a brake caliper, a caliper frame and a friction plate, wherein the caliper frame is used to be fixedly connected to the vehicle body, the brake caliper is slidably connected to the caliper frame, the brake caliper is used to be fixedly connected to the brake motor 1004, and the brake motor 1004 can slide synchronously with the brake caliper relative to the caliper frame.

[0099] The brake caliper is also used to install friction plates. In one embodiment, the number of friction plates is two, and the two friction plates are arranged on both sides of the brake disc 1003 along the axial direction of the brake disc 1003. The two friction plates face two opposite outer surfaces of the brake disc 1003 respectively.

[0100] The brake motor 1004 is used to drive the two friction plates to slide toward each other along the axial direction of the brake disc 1003 until the two friction plates contact the two outer surfaces opposite to each other of the brake disc 1003, so as to generate friction force to brake the brake disc 1003. The brake motor 1004 is also used to drive the two friction plates to slide along the axial direction of the brake disc 1003 away from the brake disc 1003, and separate from the two outer surfaces opposite to each other of the brake disc 1003 to release the brake on the brake disc 1003. That is, in this embodiment, the brake motor 1004 is used to drive the two friction plates toward or away from the brake disc 1003.

[0101] The user implements the braking operation by stepping on the foot pedal of the pedal assembly 100. The pedal assembly 100 of the present application can output a control signal based on the pedal driving force input by the user's braking operation, and the brake motor 1004 directly or indirectly responds to the control signal and drives the motor shaft of the brake motor 1004 to rotate forward. The motor shaft of the brake motor 1004 outputs a braking force to the brake 1005, and causes the friction plate close to the brake motor 1004 along the axial direction of the brake disc 1003 to slide toward the brake disc 1003 until the friction plate abuts against the brake disc 1003.

[0102] At this time, the motor shaft of the brake motor 1004 continues to rotate forward to output the braking force, which is transmitted to the brake caliper through the friction pad and the internal structure of the brake 1005, and causes the brake caliper to slide relative to the caliper frame, thereby driving the friction pad away from the brake motor 1004 along the axial direction of the brake disc 1003 to slide toward the brake disc 1003 until the friction pad abuts against the brake disc 1003. In this way, the two friction pads abut against the two opposite outer surfaces of the brake disc 1003 and brake the wheel.

[0103] When the user cancels the braking operation, the pedal assembly 100 interrupts the control signal output to the outside, and the motor shaft of the brake motor 1004 is reversed to cooperate with the internal structure of the brake 1005 to drive the two friction plates away from the brake disc 1003 along the axial direction of the brake disc 1003 until the two friction plates are separated from the two outer surfaces opposite to the brake disc 1003. In this way, the wheel brake is released, so that the wheel can continue to rotate to drive the vehicle. In the embodiment of the present application, the pedal assembly 100 is used to output a corresponding control signal in response to the user's braking operation.

[0104] Please see Figure 4 ,in Figure 4 This is a schematic diagram of the front structural view of the pedal assembly 100 provided in an embodiment of the present application.

[0105] like Figure 4 As shown, the pedal assembly 100 includes a foot pedal and a pedal arm. The foot pedal is used to receive the user's braking operation. One end of the pedal arm is used to be fixedly connected to the foot pedal, and the pedal arm is used to rotate around the other end of the pedal arm in response to the user's braking operation.

[0106] In one embodiment, a foot pedal is located within the cockpit of the vehicle.

[0107] Please see Figure 5-Figure 7 ,in Figure 5 This is a schematic diagram of a partial appearance structure of a pedal assembly 100 provided in an embodiment of the present application. Figure 6 This is a schematic diagram of a partial exploded structure of a pedal assembly 100 provided in an embodiment of the present application. Figure 7 It is a schematic diagram of a partial cross-sectional structure of a pedal assembly 100 provided in an embodiment of the present application.

[0108] like Figure 5-Figure 7As shown, the pedal assembly 100 also includes a push rod 10, a piston 20 and a pedal box 30. Among them, a pedal box 30 includes a piston chamber 31, and a piston chamber 31 is used to accommodate a piston 20. A piston 20 includes a receiving groove 21. Along the axial direction of the push rod 10, one end of the push rod 10 is used to abut the middle part of the pedal arm of the pedal assembly 100, and the other end of the push rod 10 extends from the notch 212 of the receiving groove 21 into the receiving groove 21 and extends toward the groove bottom 211 of the receiving groove 21. In one embodiment, the axis of a receiving groove 21 coincides with the axis of a push rod 10. In the embodiment of the present application, the state of the pedal assembly 100 when the user does not perform a braking operation is defined as the initial state. Unless otherwise specified, the coincidence of the axes of "A" and "B" mentioned in the subsequent description refers to the coincidence of the axes of the two when the pedal assembly 100 is in the initial state.

[0109] For ease of description, the end of the push rod 10 for abutting against the pedal arm is defined as the first end 10a, and the other end of the push rod 10 received in the receiving groove 21 is defined as the second end 10b. That is, the first end 10a of the push rod 10 is used to receive the pedal driving force, and the receiving groove 21 is used to receive the second end 10b of the push rod 10.

[0110] When the user performs a braking operation, the user applies a pedal driving force to the foot pedal by stepping on the foot pedal, and causes one end of the pedal arm connected to the foot pedal to rotate around the other end of the pedal arm toward the side of the pedal arm abutting against the push rod 10. The pedal arm is used to push the push rod 10 to move axially toward the pedal box 30. After the first end 10a of the push rod 10 receives the pedal driving force, the second end 10b of the push rod 10 pushes the groove bottom 211 of the receiving groove 21, and causes the piston 20 to move in the piston chamber 31. At this time, the pedal assembly 100 outputs a control signal based on the movement of the piston 20 in the pedal assembly 100.

[0111] When the user cancels the braking operation, the piston 20 is reset in response to the pressure in the piston chamber 31 or in response to the release of the elastic force in the piston chamber 31. The movement direction of the piston 20 when it is reset is opposite to the movement direction of the piston 20 when the user performs the braking operation. The piston 20 pushes the second end 10b of the push rod 10 to slide relative to the pedal box 30 through the groove bottom 211 of the receiving groove 21. The pedal arm rotates toward the side away from the pedal box 30 under the action of the reset driving force received by the push rod 10, and simultaneously drives the foot pedal to move. When the piston 20 is reset to the initial position, the foot pedal and the pedal arm are synchronously reset to the initial position, which is convenient for the user to perform the next braking operation.

[0112] In one embodiment, the pedal assembly 100 further includes a pressure sensor, which is used to detect a pressure change in a piston chamber 31 and output a control signal to brake the vehicle. The axis of a piston chamber 31 coincides with the axis of a push rod 10. Along the radial direction of the push rod 10, the outer diameter of the piston 20 is equal to the inner diameter of the piston chamber 31. Along the axial direction of the push rod 10, the piston 20 is used to cooperate with the piston chamber 31 to form a sealed space in the pedal box 30. The pressure sensor is used to connect the sealed space and detect the pressure change in the sealed space.

[0113] When the user performs a braking operation, the pedal driving force received by the foot pedal is sequentially transmitted to the piston 20 through the pedal arm and the push rod 10, and the piston 20 slides in the piston cavity 31 along the axial direction of the push rod 10. The piston 20 can compress the medium in the sealed space, such as gas or liquid, under the action of the pedal driving force. The pressure inside the sealed space increases, and the pressure sensor is used to detect the pressure change inside the sealed space to output a control signal. That is, the pedal assembly 100 of the present application is used to obtain the user's braking intention based on the detection result of the pressure sensor, and output a control signal to the brake motor 1004 of the braking device 1002. The brake motor 1004 outputs a braking force in response to the control signal, and drives the friction plate of the brake 1005 to slide toward each other to abut against the brake disc 1003, thereby braking the vehicle.

[0114] In one embodiment, the pedal assembly 100 further includes a slider and a displacement sensor, wherein one slider is used to be fixedly connected to the outer peripheral wall of a piston 20. One displacement sensor is used to be fixedly connected to a pedal box 30, and one displacement sensor is used to detect the displacement of a slider and output a control signal to brake the vehicle.

[0115] When the user performs a braking operation, the pedal driving force received by the foot pedal is sequentially transmitted to the piston 20 through the pedal arm and the push rod 10, and the piston 20 slides in the piston cavity 31 along the axial direction of the push rod 10. The piston 20 drives the slider to slide in the piston cavity 31, and the displacement sensor is used to detect the displacement of the slider in the piston cavity 31 to output a control signal. That is, the pedal assembly 100 of the present application is used to obtain the user's braking intention based on the detection result of the displacement sensor, and output a control signal to the brake motor 1004 of the brake device 1002. The brake motor 1004 outputs a braking force in response to the control signal, and drives the friction plate of the brake 1005 to slide toward each other to abut against the brake disc 1003, thereby braking the vehicle.

[0116] In one embodiment, the pedal assembly 100 further includes a pressure sensor, a slider, and a displacement sensor. One of the pressure sensors is used to detect the pressure change in the sealed space in a piston chamber 31 and output a control signal to brake the vehicle. One of the displacement sensors is used to detect the displacement of a slider and output another control signal to brake the vehicle. For ease of description, a control signal output by the pressure sensor is defined as a first control signal, and another control signal output by the displacement sensor is defined as a second control signal.

[0117] Please see Figure 8 ,in Figure 8 A schematic diagram of the working process of the pedal assembly 100 provided in an embodiment of the present application.

[0118] like Figure 8 As shown, when the user performs a braking operation, the piston 20 can slide in the piston chamber 31 under the action of the pedal driving force, and change the pressure of the sealed space and the relative position of the slider, so that the pressure sensor and the displacement sensor can obtain the detection result. The pedal assembly 100 will output a first control signal and a second control signal during the user's braking operation. The first control signal output by the pressure sensor and the second control signal output by the displacement sensor form a safety redundancy.

[0119] When the pressure sensor fails and is unable to correctly detect the pressure change in the sealed space, the first control signal output by the pressure sensor is difficult to accurately reflect the user's braking intention. At this time, the pedal assembly 100 of the present application outputs the second control signal output by the displacement sensor to the brake motor 1004 of the braking device 1002. When the displacement sensor fails and is unable to correctly detect the displacement of the piston 20, the second control signal output by the displacement sensor is difficult to accurately reflect the user's braking intention. At this time, the pedal assembly 100 of the present application outputs the first control signal output by the pressure sensor to the brake motor 1004 of the braking device 1002.

[0120] That is, the pressure sensor and the displacement sensor can cooperate with each other to form safety redundancy, so that when one of the pressure sensor and the displacement sensor fails, the pedal assembly 100 can output a control signal through the other of the pressure sensor and the displacement sensor, thereby ensuring that the pedal assembly 100 of the present application reliably responds to the user's braking operation, thereby improving the safety and reliability of the pedal assembly 100 of the present application.

[0121] In one embodiment, the pedal assembly 100 further includes an assembly controller. The assembly controller is used to receive a first control signal output by the pressure sensor and a second control signal output by the displacement sensor, and the assembly controller is also used to output a control signal of the pedal assembly 100 to the brake motor 1004 of the brake device 1002 based on one of the first control signal and the second control signal. That is, when the user performs a braking operation, both the first control signal and the second control signal will be transmitted to the assembly controller, and after the assembly controller processes the first control signal or the second control signal, the control signal output by the pedal assembly 100 is directly or indirectly transmitted to the brake motor 1004 of the brake device 1002.

[0122] The assembly controller is used to determine whether there is a fault in the pressure sensor and the displacement sensor. During the user's braking operation, if the pressure sensor fails, the assembly controller outputs a control signal of the pedal assembly 100 based on the second control signal. If the displacement sensor fails, the assembly controller outputs a control signal of the pedal assembly 100 based on the first control signal.

[0123] In one embodiment, during the user's braking operation, if the pressure sensor and the displacement sensor are both in a normal state, the assembly controller outputs a control signal of the pedal assembly 100 based on the second control signal. The displacement sensor detects the user's braking operation by collecting the displacement of the piston 20. When acquiring the second control signal transmitted by the displacement sensor, the assembly controller can also integrate the displacement acquired by the displacement sensor to acquire the displacement speed and displacement acceleration of the piston 20, so that the assembly controller can more accurately identify the user's braking intention and form a better braking effect.

[0124] In another embodiment, during the user's braking operation, if the pressure sensor and the displacement sensor are both in a normal state, the assembly controller outputs a control signal of the pedal assembly 100 based on the first control signal.

[0125] Please see Fig. 9 and Fig.10 ,in Fig. 9 This is a schematic diagram of the appearance structure of the internal components of the piston chamber 31 in the pedal assembly 100 provided in the embodiment of the present application. Fig.10 Schematic diagram of the cross-sectional structure of the internal components of the piston chamber 31 in the pedal assembly 100 provided in an embodiment of the present application.

[0126] like Fig. 9 and Fig.10 As shown, the pedal assembly 100 of the present application further includes a retaining ring 40. A groove wall 213 of a receiving groove 21 includes an annular groove 22, and an annular groove 22 is used to embed a retaining ring 40. Fig.10In the schematic diagram shown, along the radial direction of the push rod 10, the outer edge of the retaining ring 40 is used to be embedded in an annular groove 22, and the inner diameter of the retaining ring 40 is smaller than the maximum outer diameter of the second end 10b of the push rod 10, so as to limit the axial displacement range of the second end 10b of the push rod 10 when the second end 10b of the push rod 10 slides in the direction away from the groove bottom 211 of the accommodating groove 21.

[0127] During the resetting process of the piston 20, when the piston 20 slides to the initial position, the piston 20 stops sliding, but the push rod 10 may continue to slide in the direction away from the groove bottom 211 of the receiving groove 21 due to inertia. Or due to external shock or impact, the push rod 10 may also slide in the direction away from the groove bottom 211 of the receiving groove 21. If the sliding displacement of the push rod 10 is too large, the second end 10b may slide out of the receiving groove 21 as a whole, that is, the push rod 10 falls off from the piston 20, causing the pedal assembly 100 to fail and form a safety hazard.

[0128] The pedal assembly 100 of the present application limits the displacement of the second end 10b of the push rod 10 relative to the accommodating groove 21 by setting a retaining ring 40, and restricts the second end 10b of the push rod 10 between the groove bottom 211 of the accommodating groove 21 and the retaining ring 40, preventing the push rod 10 from falling off relative to the accommodating groove 21, thereby ensuring that the pedal assembly 100 of the present application can reliably respond to the user's braking operation.

[0129] In the embodiment of the present application, the circumferential retaining ring 40 along the push rod 10 has a circumferential notch 41. The retaining ring 40 can close the circumferential notch 41 under the action of the circumferential driving force to adjust the radial size of the retaining ring 40, so as to facilitate the retaining ring 40 to be installed into the receiving groove 21 from the notch 212 of the receiving groove 21 and embedded in the annular groove 22. That is, the pedal assembly 100 uses the retaining ring 40 with the circumferential notch 41 to limit the second end 10b of the push rod 10, so as to facilitate the installation of the retaining ring 40 and improve the installation efficiency of the pedal assembly 100.

[0130] The pedal assembly 100 of the present application is suitable for a dry brake device. Because the dry brake device does not have a sealed oil circuit, a push rod 10 and a piston 20 do not need to be sealed, so the pedal assembly 100 of the present application can use a retaining ring 40 with a circumferential notch 41 to limit a push rod 10. One of the circumferential notches 41 is used to allow a retaining ring 40 to be embedded in the groove wall 213 of the receiving groove 21. The retaining ring 40 has better structural stability for limiting a push rod 10, is not easily deformed in long-term use, and can improve the reliability and service life of the pedal assembly 100.

[0131] Please see Fig.11 ,in Fig.11 It is a schematic diagram of the side structure of the internal components of the piston chamber 31 in the pedal assembly 100 provided in an embodiment of the present application.

[0132] like Fig.11 As shown, along the circumference of the push rod 10, the length of the circumferential notch 41 of the retaining ring 40 is less than half of the circumferential length of the retaining ring 40. When the circumferential length of the circumferential notch 41 of the retaining ring 40 is too large, the circumferential length of the retaining ring 40 will be too small, and the corresponding contact area between the retaining ring 40 and the groove wall 213 of the receiving groove 21 and the second end 10b of the push rod 10 will also be relatively small. This may cause the retaining ring 40 to have a smaller limiting surface for contacting the second end 10b when the second end 10b of the push rod 10 moves along the groove bottom 211 of the receiving groove 21 toward the notch 212 of the receiving groove 21, thereby reducing the reliability of the retaining ring 40 limiting.

[0133] In one embodiment, the arc of the retaining ring 40 along the axial direction of the push rod 10 is at least greater than 180°, so as to ensure that the retaining ring 40 forms a larger contact area with the groove wall 213 of the accommodating groove 21 and the second end 10b of the push rod 10 when the second end 10b of the push rod 10 moves along the groove bottom 211 of the accommodating groove 21 toward the groove opening 212 of the accommodating groove 21, thereby improving the reliability of the retaining ring 40 in limiting the position.

[0134] During the long-term operation of the pedal assembly 100, the push rod 10 repeatedly slides in the direction away from the groove bottom 211 of the receiving groove 21. The pedal assembly 100 of the present application forms a reliable limit for the second end 10b of the push rod 10 by using the retaining ring 40 to be embedded in the groove wall of the receiving groove 21, thereby improving the reliability of the pedal assembly 100.

[0135] In one embodiment, the circumferential length of a retaining ring 40 is greater than 2 / 3 of the circumferential length of an annular groove 22 to ensure an effective contact area between a retaining ring 40 and a second end 10b of a push rod 10, thereby ensuring the reliability of the pedal assembly 100 of the present application.

[0136] In one embodiment, the material of a retaining ring 40 can be metal. The retaining ring 40 has high structural strength, and when the second end 10 b of the push rod 10 slides toward the notch 212 of the receiving groove 21 , the retaining ring 40 can reliably limit the second end 10 b of the push rod 10 .

[0137] The pedal assembly 100 of the present application needs to install a retaining ring 40 in an annular groove 22 after the circumferential notch 41 is closed. That is, in the process of installing the retaining ring 40 in the annular groove 22, the circumferential notch 41 needs to be closed by a circumferential driving force to adjust the radial size of the retaining ring 40, so that the outer diameter of the adjusted retaining ring 40 can be less than or equal to the inner diameter of the receiving groove 21, so that the retaining ring 40 with adjusted radial size can be placed into the receiving groove 21 from the notch 212 of the receiving groove 21. When the retaining ring 40 slides along the axial direction of the push rod 10 to the position of the annular groove 22, after the circumferential driving force applied to the retaining ring 40 is released, the retaining ring 40 restores its original shape under the action of its own elastic force, and the retaining ring 40 is embedded in the annular groove 22.

[0138] In one embodiment, along the circumference of one push rod 10, the length of the circumferential notch 41 of one retaining ring 40 is greater than 1 / 5 of the circumferential length of one retaining ring 40. If the length of the circumferential notch 41 of the retaining ring 40 is too small, the outer diameter of the retaining ring 40 may still be greater than the inner diameter of the receiving groove 21 after the circumferential notch 41 is closed, which may affect the installation of the retaining ring 40.

[0139] The pedal assembly 100 of the present application controls the length of the circumferential notch 41 of the retaining ring 40 so that the radial dimension of the retaining ring 40 after the circumferential notch 41 is closed by the circumferential driving force can be less than or equal to the inner diameter of the receiving groove 21, so as to facilitate the installation of the retaining ring 40 in the annular groove 22. In the process that the second end 10b of the push rod 10 moves along the groove bottom 211 of the receiving groove 21 toward the notch 212 of the receiving groove 21, it is ensured that the retaining ring 40 forms a large contact area with the groove wall 213 of the receiving groove 21 and the second end 10b of the push rod 10, so as to ensure that the retaining ring 40 can reliably limit the second end 10b of the push rod 10.

[0140] In one embodiment, along the axial direction of a push rod 10, the groove wall 213 of a receiving groove 21 is divided into two sections by an annular groove 22, one section is arranged between the notch 212 of the receiving groove 21 and the other section, and the inner diameter of one section is larger than the inner diameter of the other section and smaller than the outer diameter of a retaining ring 40. For the convenience of description, a section of the groove wall 213 of the receiving groove 21 close to the notch 212 of the receiving groove 21 is defined as a first section 21a, and a section of the groove wall 213 of the receiving groove 21 away from the notch 212 of the receiving groove 21 is defined as a second section 21b.

[0141] Please see Fig.12 and Fig.13 ,in Fig.12 This is a partial enlarged structural diagram of the internal components of the piston chamber 31 in the pedal assembly 100 provided in the embodiment of the present application. Fig.13 This is a partial cross-sectional structural diagram of the piston 20 of the pedal assembly 100 provided in the embodiment of the present application. For ease of description, Fig.12Only some components within the piston chamber 31 are shown.

[0142] like Fig.12 and Fig.13 As shown, the axis of the receiving groove 21 and the axis of the annular groove 22 are both coincident with the axis of the push rod 10. Along the radial direction of the push rod 10, the diameter of the groove bottom of the annular groove 22 is greater than the inner diameter of the receiving groove 21. Among them, the diameter of the groove bottom of the annular groove 22 is greater than the inner diameter of the first section 21a and the inner diameter of the second section 21b, so that when the retaining ring 40 is embedded in the annular groove 22, the two sides of the retaining ring 40 along the axial direction of the push rod 10 can respectively abut against the two groove walls of the annular groove 22. That is, the relationship between the diameter of the groove bottom of the annular groove 22 and the size of the first section 21a and the second section 21b enables the retaining ring 40 embedded in the annular groove 22 to be fixed along the axial direction of the push rod 10.

[0143] exist Fig.12 In the figure shown, the inner diameter of the first section 21a is larger than the inner diameter of the second section 21b and smaller than the outer diameter of the retaining ring 40. That is, the inner diameter of the first section 21a near the notch 212 of the receiving groove 21 is larger than the inner diameter of the second section 21b near the groove bottom 211. In the process of installing the retaining ring 40 from the notch 212 of the receiving groove 21 to the annular groove 22 after the circumferential notch 41 is closed, it is only necessary to control the outer diameter of the retaining ring 40 to be smaller than or equal to the inner diameter of the first section 21a, thereby reducing the difficulty of installing the retaining ring 40 and improving the installation efficiency of the pedal assembly 100.

[0144] On the other hand, the radial dimension of the retaining ring 40 is adjusted by controlling the closing of the circumferential notch 41 by the circumferential driving force during the installation process. The pedal assembly 100 increases the inner diameter of the first section 21a close to the notch 212 of the receiving groove 21, so that the radial dimension of the retaining ring 40 can be reduced to a small extent, while ensuring that the retaining ring 40 can be fixed on the groove wall 213 of the receiving groove 21. Correspondingly, the circumferential length of the circumferential notch 41 of the retaining ring 40 is shortened, and the contact area between the retaining ring 40 and the groove wall 213 of the receiving groove 21 and the second end 10b of the push rod 10 is increased during the movement of the second end 10b of the push rod 10 along the groove bottom 211 of the receiving groove 21 toward the notch 212 of the receiving groove 21. In addition, the reliability of the retaining ring 40 limiting the second end 10b of the push rod 10 is improved.

[0145] In one embodiment, the inner diameter of the second section 21b of a receiving groove 21 is greater than the inner diameter of a retaining ring 40. Along the axial direction of the push rod 10, a retaining ring 40 includes a first end face 421 and a second end face 422 that are arranged opposite to each other, the first end face 421 faces the groove bottom 211 of the receiving groove 21, and the second end face 422 faces the notch 212 of the receiving groove 21. Fig.12In the schematic diagram shown, the inner diameter of the first end surface 421 is smaller than the inner diameter of the second section 21 b of the accommodating groove 21. That is, the first end surface 421 is partially exposed from the annular groove 22 along the axial direction of the push rod 10.

[0146] When the second end 10b of the push rod 10 moves along the bottom 211 of the accommodating groove 21 toward the notch 212 of the accommodating groove 21, the partial area of ​​the first end surface 421 exposed in the annular groove 22 is used to limit the movement of the second end 10b of the push rod 10, thereby improving the reliability of the pedal assembly 100.

[0147] In one embodiment, the end of the first section 21a of a receiving groove 21 away from an annular groove 22 along the axial direction of a push rod 10 includes a tapered groove wall 21c, and the inner diameter of the tapered groove wall 21c gradually decreases from the notch 212 of the receiving groove 21 to the annular groove 22. The axis of the tapered groove wall 21c, the axis of the first section 21a of the receiving groove 21, and the axis of the second section 21b of the receiving groove 21 all coincide with the axis of the push rod 10. Along the axial direction of the push rod 10, the second section 21b of the receiving groove 21, the annular groove 22, the first section 21a of the receiving groove 21, and the tapered groove wall 21c are arranged in sequence. In the process of inserting the retaining ring 40 into the annular groove 22, the retaining ring 40 needs to pass through the notch 212 of the receiving groove 21, the tapered groove wall 21c, and the first section 21a of the receiving groove 21 in sequence along the axial direction of the push rod 10 before it can be inserted into the annular groove 22.

[0148] Along the axial direction of the push rod 10, the inner diameter of the end of the tapered groove wall 21c away from the annular groove 22 is greater than or equal to the outer diameter of the retaining ring 40. In the process of inserting the retaining ring 40 into the annular groove 22, the retaining ring 40 can be placed into the receiving groove 21 from the notch 212 of the receiving groove 21 along the axial direction of the push rod 10, and the retaining ring 40 slides toward the annular groove 22 by applying a thrust along the axial direction of the push rod 10 to the retaining ring 40. The tapered groove wall 21c is used to guide the retaining ring 40 to slide toward the annular groove 22. In the process of the retaining ring 40 sliding toward the annular groove 22 in the tapered groove wall 21c, based on the change of the inner diameter of the tapered groove wall 21c, the retaining ring 40 can also gradually close the circumferential notch 41 as the sliding process progresses to reduce its own radial size, until the retaining ring 40 slides into the first section 21a of the receiving groove 21. The first section 21a of the receiving groove 21 is used to guide the retaining ring 40 to slide into the annular groove 22.

[0149] That is, when the retaining ring 40 slides in the tapered groove wall 21c toward the annular groove 22, the tapered groove wall 21c can adjust the posture of the retaining ring 40 based on the change of its inner diameter, and the axial thrust applied to the retaining ring 40 can also cooperate with the tapered groove wall 21c to reduce the radial size of the retaining ring 40. Therefore, the tapered groove wall 21c can assist the retaining ring 40 to be smoothly installed in the annular groove 22, thereby improving the installation efficiency of the retaining ring 40.

[0150] In one embodiment, the inclination angle of a conical groove wall 21c relative to the axis of a push rod 10 ranges from 10° to 30°. When the inclination angle of the conical groove wall 21c relative to the axis of the push rod 10 is too small, the size of the conical groove wall 21c along the axial direction of the push rod is too large while ensuring the variation of the inner diameters of both ends of the conical groove wall 21c along the axial direction of the push rod 10, thereby causing the axial length of the receiving groove 21 to be too large, which may affect the arrangement of other components of the pedal assembly 100 of the present application.

[0151] When the inclination angle of the tapered groove wall 21c is too large compared to the axis of the push rod 10, in the process of embedding the retaining ring 40 into the annular groove 22, the axial thrust applied to the retaining ring 40 will act more on the tapered groove wall 21c, thereby causing the pressure between the contact surface of the tapered groove wall 21c and the retaining ring 40 to increase, resulting in an increase in the friction force between the tapered groove wall 21c and the retaining ring 40, affecting the guiding effect of the tapered groove wall 21c on the retaining ring 40, and reducing the installation efficiency of the retaining ring 40.

[0152] Therefore, the pedal assembly 100 can reduce the axial dimension of the tapered groove wall 21c while ensuring the guiding effect of the tapered groove wall 21c on the retaining ring 40 by controlling the inclination angle range of the tapered groove wall 21c compared to the axis of the push rod 10, thereby reducing the axial dimension of the piston 20, making the structure of the pedal assembly 100 of the present application compact and conducive to the miniaturization of the pedal assembly 100 of the present application.

[0153] In one embodiment, the groove wall 213 of the receiving groove 21 further includes a third section 21d, wherein the groove bottom 211 of the receiving groove 21 is close to the second section 21b, and the notch 212 of the receiving groove 21 is close to the third section 21d. Along the axial direction of the push rod 10, the second section 21b of the receiving groove 21, the first section 21a of the receiving groove 21, the tapered groove wall 21c, and the third section 21d of the receiving groove 21 are arranged in sequence. The inner diameter of the third section 21d of the receiving groove 21 is equal to the inner diameter of the end of the tapered groove wall 21c close to the notch 212 of the receiving groove 21. The third section 21d of the receiving groove 21 is used to control the inner diameter of the end of the tapered groove wall 21c close to the notch 212 of the receiving groove 21, so as to facilitate the processing and manufacturing of the tapered groove wall 21c.

[0154] In one embodiment, a retaining ring 40 includes two through holes 43, which are respectively located at both ends of a retaining ring 40 along the circumference of a push rod 10, and the two through holes 43 are used to receive a circumferential driving force to close a circumferential gap 41 of a retaining ring 40, wherein when the circumferential gap 41 is closed along the circumference of a push rod 10, the outer diameter of a retaining ring 40 is smaller than the inner diameter of the first section 21a of a accommodating groove 21, and the inner diameter of a retaining ring 40 is larger than the outer diameter of a push rod 10.

[0155] In the process of inserting the retaining ring 40 into the annular groove 22, a circumferential driving force can be applied to the retaining ring 40 through the two through holes 43, so that the circumferential notch 41 of the retaining ring 40 is closed, so as to reduce the radial dimension of the retaining ring 40 to match the inner diameter of the receiving groove 21, and the retaining ring 40 can be inserted into the annular groove 22 after the radial dimension is reduced, thereby realizing the installation of the retaining ring 40. That is, the pedal assembly 100 is provided with a through hole 43 at each end of the retaining ring 40 along the circumference of the push rod 10, and the circumferential length of the circumferential notch 41 can be controlled by controlling the circumferential spacing between the two through holes 43, thereby improving the installation efficiency of the pedal assembly 100.

[0156] On the other hand, the pedal assembly limits the relationship between the inner diameter of the retaining ring 40 and the outer diameter of the push rod 10 after the circumferential notch 41 of the retaining ring 40 is closed, so as to avoid the situation where the outer circumferential surface of the push rod 10 interferes with the inner circumferential surface of the retaining ring 40 when the radial dimension of the retaining ring 40 is reduced through the two through holes 43. Thereby, the installation of the retaining ring 40 is smooth and the installation efficiency of the pedal assembly 100 is guaranteed.

[0157] In one embodiment, when the circumferential notch 41 of a retaining ring 40 is closed, the maximum distance between each through hole 43 and the axis of an accommodating groove 21 is less than the radius of the first section 21a of an accommodating groove 21. Along the axial direction of the push rod 10, each through hole 43 is connected to the first end surface 421 and the second end surface 422 of the retaining ring 40.

[0158] Based on the fact that the second end face 422 is closer to the first section 21a of the receiving groove 21 than the first end face 421, the pedal assembly 100 limits the relationship between the maximum distance between the through hole 43 and the axis of the receiving groove 21 and the radius of the first section 21a of the receiving groove 21, so that each through hole 43 is exposed in the annular groove 22 under the premise of ensuring that the second end face 422 of the retaining ring 40 partially abuts against the groove wall of the annular groove 22, so as to reduce the radial dimension of the retaining ring 40 through the two through holes 43 to realize the replacement of the retaining ring 40.

[0159] In one embodiment, the second end 10 b of a push rod 10 includes a ball head 11 , and the ball head 11 is used to push a piston 20 to move along a first direction through a groove bottom 211 of an accommodating groove 21 .

[0160] Please see Fig.14 ,in Fig.14 A schematic diagram of the appearance structure of the push rod 10 of the pedal assembly 100 provided in an embodiment of the present application.

[0161] like Fig.14As shown, the first direction is parallel to the axial direction of the push rod 10, and the ball head 11 is used to push the piston 20 to slide along the axial direction of the push rod 10 through the groove bottom 211 of the receiving groove 21 under the action of the pedal driving force. When the user performs a braking operation, the pedal driving force transmitted to the push rod 10 via the foot pedal and the pedal arm is transmitted to the groove bottom 211 of the receiving groove 21 through the ball head 11, thereby pushing the piston 20 to slide along the axial direction of the push rod 10. The pressure sensor and the displacement sensor of the pedal assembly 100 output a control signal based on the sliding of the piston 20 to brake the vehicle.

[0162] In the embodiment of the present application, along the radial direction of the push rod 10, the maximum outer diameter of the ball head 11 is greater than the inner diameter of the retaining ring 40. When the ball head 11 of the push rod 10 slides in a direction away from the groove bottom 211 of the receiving groove 21, the retaining ring 40 can limit the axial movement of the push rod 10 by blocking the axial movement of the ball head 11. In the long-term operation process of the pedal assembly 100 of the present application, the ball head 11 can be accommodated in the receiving groove 21, thereby improving the reliability of the pedal assembly 100 of the present application.

[0163] In one embodiment, the groove bottom 211 of an accommodating groove 21 is conical, and the inner diameter of the groove bottom 211 of an accommodating groove 21 gradually increases toward an annular groove 22 along the axial direction of a push rod 10. The axis of the groove bottom 211 of the accommodating groove 21 coincides with the axis of the accommodating groove 21.

[0164] exist Figure 4 In the schematic diagram, when the user performs a braking operation, the user's pedal driving force is transmitted to the push rod 10 through the foot pedal and the pedal arm, and the user's pedal driving force is used to push the ball head 11 of the push rod 10 to abut against the groove bottom 211 of the receiving groove 21. Since the pedal arm rotates around the end of the pedal arm away from the foot pedal, the first end 10a of the push rod 10 is used to abut against the middle of the pedal arm. When the push rod 10 receives the pedal driving force transmitted by the pedal arm, the push rod 10 can transmit the pedal driving force to the piston 20 along the axial direction of the push rod 10, and the push rod 10 may also rotate and deviate relative to the receiving groove 21 based on the rotation of the pedal arm.

[0165] In the embodiment of the present application, the groove bottom 211 of the conical receiving groove 21 makes it possible for the rotational offset of the push rod 10 relative to the receiving groove 21 to not affect the radial position of the ball head 11, and the pedal driving force transmitted to the ball head 11 that causes the rotational offset of the push rod 10 can still be transmitted to the piston 20 along the first direction, thereby ensuring that the pedal driving force transmitted to the ball head 11 can be reliably transmitted to the groove bottom 211 of the receiving groove 21, and the piston 20 can slide along the first direction. That is, the groove bottom 211 of the conical receiving groove 21 is convenient for cooperating with the ball head 11 to achieve reliable transmission of the pedal driving force, thereby improving the control accuracy of the control signal transmitted by the pressure sensor and the displacement sensor based on the sliding of the piston 20 of the pedal assembly 100, and improving the braking effect of the pedal assembly 100 of the present application.

[0166] On the other hand, the contact surface between the groove bottom 211 of the conical receiving groove 21 and the ball head 11 is annular in shape, which can reduce the contact area between the groove bottom 211 and the ball head 11, reduce the friction loss between the ball head 11 and the groove bottom 211 of the receiving groove 21, and improve the service life of the pedal assembly 100. Compared with the spherical groove bottom of the receiving groove used in the prior art. The pedal assembly 100 of the present application can reduce the difficulty of processing the receiving groove 21 by setting the groove bottom 211 of the receiving groove 21 to be conical. Based on the reduction in processing difficulty, the surface roughness of the groove bottom 211 of the receiving groove 21 is also improved, thereby reducing the friction between the groove bottom 211 of the receiving groove 21 and the ball head 11, reducing the wear of the ball head 11, and controlling the generation of noise during the operation of the pedal assembly 100 of the present application. Thereby, the service life of the pedal assembly 100 of the present application and the user experience are improved.

[0167] In one embodiment, the taper of the groove bottom 211 of a receiving groove 21 is greater than or equal to 100°. The groove bottom 211 of the conical receiving groove 21 is used to cooperate with the ball head 11 to ensure that the first direction of the piston 20 sliding is parallel to the axial direction of the receiving groove 21. In the embodiment of the present application, the pedal assembly 100 controls the taper range of the groove bottom 211 of the receiving groove 21 to ensure that the first direction is parallel to the axial direction of the receiving groove 21, thereby avoiding the phenomenon that the groove bottom 211 of the receiving groove 21 is too large along the axial dimension of the push rod 10 due to the small taper of the groove bottom 211 of the receiving groove 21, thereby causing the axial dimension of the piston 20 to be too large and affecting the arrangement of other components. This makes the structure of the pedal assembly 100 of the present application compact, which is conducive to the miniaturization of the pedal assembly 100 of the present application.

[0168] In one embodiment, the taper of the groove bottom 211 of an accommodating groove 21 is 120°.

[0169] In one embodiment, the groove bottom 211 of a receiving groove 21 includes a surface coating, and the surface coating contains a sound-absorbing material to reduce the noise generated when the ball head 11 rubs against the groove bottom 211 of the receiving groove 21, thereby improving the user experience.

[0170] In one embodiment, a receiving groove 21 is used to accommodate an elastic member 50, and a retaining ring 40 along the axial direction of a push rod 10 is used to push a ball head 11 of a second end 10b of a push rod 10 to abut against a groove bottom 211 of a receiving groove 21 through an elastic member 50.

[0171] Please see Figure 15-17 ,in Fig.15 This is a schematic diagram of the appearance structure of the internal components of the receiving groove 21 in one embodiment of the pedal assembly 100 provided in the present application. Fig.16 A schematic cross-sectional view of components inside the receiving groove 21 in one embodiment of the pedal assembly 100 provided in the present application. Fig.17 The figure is a schematic diagram of the exploded structure of the internal components of the receiving groove 21 in one embodiment of the pedal assembly 100 provided in the present application. In order to facilitate the structure of the internal components of the receiving groove 21, only the partial structure of the push rod 10 with the ball head 11 is shown in the figure.

[0172] like Figure 15-17 As shown, the axis of the elastic member 50 coincides with the axis of the push rod 10. Along the axial direction of the push rod 10, the two ends of the elastic member 50 face the ball head 11 and the retaining ring 40 respectively. In the process of the ball head 11 of the push rod 10 sliding toward the retaining ring 40, the ball head 11 will compress the elastic member 50. The elastic member 50 is used to absorb the driving force transmitted from the ball head 11 to the elastic member 50 and transmit the driving force to the retaining ring 40. Thereby, the ball head 11 of the push rod 10 is limited. Among them, the pedal assembly 100 can reduce the impact of the ball head 11 on the retaining ring 40 by arranging the elastic member 50 between the ball head 11 and the retaining ring 40, prevent the retaining ring 40 from being damaged due to excessive impact force, thereby improving the service life of the pedal assembly 100.

[0173] In the embodiment of the present application, the elastic member 50 is used to provide elastic force to the ball head 11, so that the ball head 11 can abut against the groove bottom 211 of the receiving groove 21, and eliminate the gap between the ball head 11 and the groove bottom 211 of the receiving groove 21. The idle stroke of the push rod 10 is eliminated during the user's braking operation, so that the user's braking operation stroke is always consistent. The elimination of the idle stroke is also conducive to controlling the noise of the pedal assembly 100.

[0174] On the other hand, when the user performs a braking operation, the push rod 10 will rotate and deviate relative to the receiving groove 21 due to the rotation of the pedal arm. The elastic member 50 is sleeved on the outer edge of the push rod 10. After the push rod 10 rotates and deviates, the elastic member 50 can use the elastic deformation to store elastic force to push the ball head 11 of the push rod 10 to reset along the radial direction of the push rod 10 toward the axis of the receiving groove 21, that is, the offset of the push rod 10 relative to the axis of the receiving groove 21 is reduced under the elastic force of the elastic member 50. After the push rod 10 rotates and deviates, the elastic member 50 also forms an automatic return effect on the push rod 10.

[0175] In one embodiment, along the radial direction of a push rod 10, an elastic member 50 is used to be sleeved outside a push rod 10, the outer diameter of an elastic member 50 is larger than the inner diameter of a retaining ring 40, and the inner diameter of an elastic member 50 is smaller than the outer diameter of a ball head 11. Along the axial direction of the push rod 10, the projection of the elastic member 50 on the ball head 11 is accommodated in the end surface of the ball head 11 facing the notch 212 of the receiving groove 21, and the projection of the elastic member 50 on the retaining ring 40 is at least partially accommodated in the first end surface 421 of the retaining ring 40. Therefore, the elastic force of the elastic member 50 can be transmitted to the ball head 11 and the retaining ring 40 respectively.

[0176] When the user performs a braking operation, the ball head 11 may rotate relative to the receiving groove 21, so that the ball head 11 can be displaced in the radial direction of the push rod 10 under the action of the pedal driving force. The elastic member 50 is sleeved outside the push rod 10, and the axis of the elastic member 50 coincides with the axis of the push rod 10, so that the elastic member 50 can limit the radial displacement of the ball head 11 by limiting the radial position of the part of the push rod 10 passing through the elastic member 50.

[0177] In one embodiment, an elastic member 50 is tapered, and the outer diameter of one end of the elastic member 50 facing a retaining ring 40 along the axial direction of a push rod 10 is larger than the outer diameter of the other end.

[0178] Please see Fig.18 and Fig.19 ,in Fig.18 This is a schematic diagram of the partial structure of the internal components of the receiving groove 21 in another embodiment of the pedal assembly 100 provided in the embodiment of the present application. Fig.19 A schematic diagram of the appearance structure of the elastic member 50 in another embodiment of the pedal assembly 100 provided in an embodiment of the present application.

[0179] like Fig.18 and Fig.19As shown, along the axial direction of a push rod 10, from an annular groove 22 to the groove bottom 211 of an accommodating groove 21, the outer diameter of an elastic member 50 gradually decreases. For the elastic member 50, the inner diameter of the elastic member 50 is related to the elastic coefficient of the elastic member 50. The larger the inner diameter of the elastic member 50, the smaller the elastic coefficient. The smaller the elastic coefficient, the greater the compression of the elastic member 50 for the same pressure. Therefore, the elastic force of the tapered elastic member 50 gradually increases during the compression process.

[0180] During the process of the ball head 11 sliding toward the notch 212 of the receiving groove 21, the elastic member 50 will be compressed by the ball head 11. In the initial stage when the elastic member 50 is compressed by the ball head 11, the axial limiting thrust formed by the elastic member 50 on the ball head 11 is relatively small, and the ball head 11 can slide at a relatively fast speed toward the groove bottom 211 away from the receiving groove 21 under the action of inertia or external impact. As the sliding process of the ball head 11 proceeds, the elastic force of the elastic member 50 gradually increases, and the axial limiting thrust formed on the ball head 11 gradually increases. The acceleration of the sliding of the ball head 11 gradually slows down due to the gradually increasing axial limiting thrust until the ball head 11 stops sliding relative to the receiving groove 21.

[0181] Then, the elastic force stored in the elastic member 50 will push the push rod 10 to move toward the groove bottom 211 of the receiving groove 21. In the initial stage of releasing the elastic force of the elastic member 50, because the elastic force stored in the elastic member 50 is relatively large, the ball head 11 will move away from the notch 212 of the receiving groove 21 at a relatively fast speed. As the sliding process of the ball head 11 proceeds, the elastic force of the tapered elastic member 50 gradually decreases, and the axial limiting thrust formed on the ball head 11 gradually decreases. The sliding speed of the ball head 11 toward the groove bottom 211 of the receiving groove 21 gradually decreases until the ball head 11 abuts against the groove bottom 211 of the receiving groove 21.

[0182] Therefore, in the process of the ball head 11 sliding toward the notch 212 of the receiving groove 21, the tapered elastic member 50 applies an axial limiting thrust to the ball head 11 that is first small and then large, which can improve the comfort of the user stepping on the pedal. The tapered elastic member 50 also reduces the impact of the ball head 11 on the elastic member 50, preventing noise from being generated in the process of compressing the elastic member 50 due to the excessive sliding speed of the ball head 11. In the process of the ball head 11 sliding toward the groove bottom 211 of the receiving groove 21, the tapered elastic member 50 applies an axial limiting thrust to the ball head 11 that is first large and then small, which, on the one hand, reduces the time required for the ball head 11 to reset. On the other hand, it reduces the speed at which the ball head 11 contacts the groove bottom 211 of the receiving groove 21, reduces the impact of the ball head 11 on the groove bottom 211 of the receiving groove 21, and prevents the noise generated when the ball head 11 contacts the groove bottom 211 of the receiving groove 21 due to the excessive sliding speed.

[0183] As a result, the pedal assembly 100 provides better feedback to the user, thereby improving the user's experience.

[0184] In one embodiment, after the pedal assembly 100 is installed, an elastic member 50 is in a pre-stressed state, so that the elastic member 50 can always provide elastic force for the ball head 11 of the push rod 10 to abut against the bottom 211 of the receiving groove 21, thereby eliminating the gap between the ball head 11 and the bottom 211 of the receiving groove 21 and eliminating the empty travel during the user's braking process.

[0185] In one embodiment, the pre-compression force of an elastic member 50 ranges from 30N to 80N.

[0186] In one embodiment, the stiffness of one elastic member 50 ranges from 10 N / mm to 20 N / mm.

[0187] In one embodiment, during the resetting process of a piston 20, a groove bottom 211 of a receiving groove 21 pushes an elastic member 50 through a ball head 11 to squeeze a gasket 60 toward a retaining ring 40, wherein along the radial direction of a push rod 10, a gasket 60 is used to be sleeved outside a push rod 10, and an outer diameter of a gasket 60 is larger than an inner diameter of an elastic member 50 and larger than an inner diameter of a retaining ring 40.

[0188] The pedal assembly 100 of the present application further includes a washer 60, the axis of which coincides with the axis of the push rod 10. Along the axial direction of the push rod 10, the two sides of the washer 60 are used to abut against the elastic member 50 and the retaining ring 40 respectively. In the process of the ball head 11 sliding toward the notch 212 of the accommodating groove 21, the ball head 11 can transmit the force that pushes the ball head 11 to slide to the washer 60 through the elastic member 50. Among them, the washer 60 has a relatively complete circumference compared to the retaining ring 40, and there is a certain contact area between the washer 60 and the retaining ring 40. When the force is transmitted to the washer 60, the washer 60 can evenly disperse the force along the circumference of the push rod 10 and transmit it to the retaining ring 40. That is, the washer 60 is used to evenly disperse the force to the retaining ring 40 to prevent the retaining ring 40 from being damaged due to excessive local force. Thereby extending the service life of the pedal assembly 100.

[0189] In one embodiment, a washer 60 is used to cover the circumferential notch 41 of a retaining ring 40 along the circumference of a push rod 10. The pedal assembly 100 limits the axial deformation of the elastic member 50 by setting the washer 60 to cover the circumferential notch 41. It avoids the phenomenon that the part of the elastic member 50 that is opposite to the circumferential notch 41 of the retaining ring 40 extends into the circumferential notch 41 due to uneven force, and the force transmitted to the retaining ring 40 through the elastic member 50 can be evenly dispersed by the washer 60 and then transmitted to the retaining ring 40. In one embodiment, the thickness of a washer 60 along the axial direction of a push rod 10 is greater than or equal to the thickness of a retaining ring 40. The pedal assembly 100 increases the thickness of the washer 60 to improve the strength of the washer 60, ensuring that the washer 60 evenly transmits the elastic force of the elastic member 50 to the retaining ring 40. Thereby ensuring the service life of the pedal assembly 100.

[0190] On the other hand, the thickness of the washer 60 is greater than that of the retaining ring 40, which can prevent the washer 60 from failing before the retaining ring 40 in the process of receiving the elastic force of the elastic member 50, thereby guiding the failure position of the pedal assembly 100 to the retaining ring 40. Based on the fact that the retaining ring 40 is close to the notch 212 of the receiving groove 21. In this embodiment, the retaining ring 40 can be implemented with standard parts, so that after the retaining ring 40 fails in shear force due to the elastic force of the elastic member 50, it is convenient to replace the retaining ring 40 through the notch 212 of the receiving groove 21, thereby shortening the maintenance time of the pedal assembly 100.

[0191] In one embodiment, a receiving groove 21 is used to receive a bushing 70, and a bushing 70 includes a ring 71 and an axial protrusion 72. During the resetting process of a piston 20, a groove bottom 211 of a receiving groove 21 pushes a ring 71 through a ball head 11 to squeeze an elastic member 50 toward a retaining ring 40, wherein an axial protrusion 72 is used to surround an elastic member 50 along the radial direction of a push rod 10, and an inner diameter of an axial protrusion 72 is smaller than an outer diameter of a washer 60. One end of an axial protrusion 72 along the axial direction of a push rod 10 is used to connect to an end surface of a ring 71 facing a retaining ring 40, and the distance between the other end of an axial protrusion 72 and a washer 60 is smaller than the maximum compression amount of an elastic member 50.

[0192] Please see Fig. 20 ,in Fig. 20 This is a schematic diagram of the appearance structure of the bushing 70 of the pedal assembly 100 provided in an embodiment of the present application.

[0193] like Fig. 20As shown, the axis of the bushing 70 coincides with the axis of the push rod 10. Along the axial direction of the push rod 10, the ball head 11, the ring 71, the axial protrusion 72, the washer 60, and the retaining ring 40 are arranged in sequence. The two ends of the elastic member 50 are used to abut the ring 71 and the washer 60 respectively. In the process of the ball head 11 sliding toward the notch 212 of the accommodating groove 21, the ball head 11 transfers the thrust of the piston 20 to the elastic member 50 through the ring 71, and converts it into the elastic force inside the elastic member 50. The elastic member 50 transfers the elastic force to the washer 60, and the washer 60 is used to evenly disperse the elastic force and transfer the evenly dispersed elastic force to the retaining ring 40.

[0194] In the process of the ball head 11 sliding toward the notch 212 of the receiving groove 21, the end of the axial protrusion 72 close to the retaining ring 40 will gradually approach the washer 60 as the ball head 11 slides. When the washer 60 abuts against the axial protrusion 72, the inertial force of the ball head 11 will be directly transmitted to the washer 60 via the ring 71 and the axial protrusion 72, and then evenly dispersed through the washer 60 and transmitted to the retaining ring 40.

[0195] The pedal assembly 100 limits the distance between the end of the axial protrusion 72 away from the ring 71 and the washer 60 to be smaller than the maximum compression amount of the elastic member 50, so that when the ball head 11 moves toward the notch 212 of the receiving groove 21, the bushing 70 and the washer 60 are in direct contact, thereby protecting the elastic member 50 from failure due to excessive compression. The reliability of the pedal assembly 100 is improved.

[0196] On the other hand, when the inertia of the ball head 11 is too large and the retaining ring 40 fails due to shear force, the axial protrusion 72 protects the elastic member 50, so that the user only needs to replace the retaining ring 40, which facilitates the later maintenance of the pedal assembly 100.

[0197] In the embodiment of the present application, the axial protrusion 72 is used to separate the elastic member 50 from the groove wall 213 of the receiving groove 21. Since the axial dimension of the elastic member 50 is compressed during the sliding of the ball head 11 toward the notch 212 of the receiving groove 21, the radial dimension of the elastic member 50 increases as the compression amount of the elastic member 50 increases. The provision of the axial protrusion 72 can prevent the elastic member 50 from contacting the groove wall 213 of the receiving groove 21 during the compression process, thereby protecting the side wall of the elastic member 50 and ensuring the reliability of the pedal assembly 100.

[0198] In one embodiment, along the axial direction of a push rod 10 , the distance between the other end of an axial protrusion 72 and a washer 60 ranges from 0.5 mm to 1 mm.

[0199] In one embodiment, the gap between an axial protrusion 72 and an elastic member 50 along the radial direction of a push rod 10 is smaller than the gap between an axial protrusion 72 and a groove wall 213 of a receiving groove 21. When the user performs a braking operation, the push rod 10 will rotate relative to the receiving groove 21 due to the rotation of the pedal arm, and the rotational deviation of the push rod 10 may cause the elastic member 50 to deform radially. In the embodiment of the present application, the pedal assembly 100 controls the radial gap between the axial protrusion 72 and the elastic member 50, so that the axial protrusion 72 can limit the elastic member 50 along the radial direction of the push rod 10 and guide the elastic member 50 to reset along the radial direction of the push rod 10.

[0200] That is, the pedal assembly 100 of the present application realizes radial limitation of the elastic member 50 by radially disposing an axial protrusion 72 closer to the side wall of the elastic member 50 than the groove wall 213 of the accommodating groove 21 along the radial direction of the push rod 10, thereby blocking the radial deformation of the elastic member 50 caused by the rotational deviation of the push rod 10, and avoiding the possibility of the elastic member 50 directly contacting the groove wall 213 of the accommodating groove 21 due to the rotational deviation, thereby protecting the side wall of the elastic member 50 and ensuring the reliability of the pedal assembly 100.

[0201] On the other hand, the axial protrusion 72 can also cooperate with the elastic member 50 and the radial space between the ball head 11 and the groove wall 213 of the receiving groove 21 to limit the rotation angle of the push rod 10 relative to the receiving groove 21, so as to reduce the influence of the rotation angle of the ball head 11 on the displacement of the piston 20 and the compression of the sealed space. This improves the correlation between the displacement of the piston 20 and the compression of the sealed space, which is beneficial to the output of the detection results of the subsequent pressure sensor and displacement sensor, and ensures the reliability of the control signal output by the pedal assembly 100 of the present application. In one embodiment, the axial protrusion 72, the elastic member 50, and the radial space between the ball head 11 and the groove wall 213 of the receiving groove 21 cooperate with each other to limit the rotation angle range of the ball head 11 of the push rod 10 to between 3° and 10°.

[0202] In one embodiment, the elastic member 50 is tapered, and the outer diameter of one end of the elastic member 50 toward the retaining ring 40 is larger than the outer diameter of the other end along the axial direction of the push rod 10. The inner circumference of the axial protrusion 72 is tapered, and the inner diameter of one end of the axial protrusion 72 toward the retaining ring 40 is larger than the inner diameter of the other end along the axial direction of the push rod 10. The inner circumference of the tapered axial protrusion 72 is used to match the tapered elastic member 50 to limit the radial displacement of the elastic member 50 when the push rod 10 is rotationally offset.

[0203] In one embodiment, the inner diameter of a ring member 71 along the radial direction of a push rod 10 is smaller than the inner diameter of a washer 60. When the user performs a braking operation, the pedal arm rotates under the pedal driving force of the foot pedal, and the push rod 10 rotates and deviates relative to the receiving groove 21 due to the rotation of the pedal arm. Limited by the abutment relationship between the second end 10b of the push rod 10 and the groove bottom 211 of the receiving groove 21, the deflection of the push rod 10 along its own radial direction gradually increases from the groove bottom 211 of the receiving groove 21 to the notch 212 of the receiving groove 21.

[0204] Correspondingly, the radial offset of the push rod 10 at the ring 71 is smaller than the radial offset of the push rod 10 at the washer 60. Since the ring 71 and the washer 60 are both sleeved on the outer edge of the push rod 10. Therefore, along the radial direction of the push rod 10, the gap between the push rod 10 and the inner circumference of the ring 71 is relatively small, and the gap between the push rod 10 and the inner circumference of the washer 60 is relatively large. Under the premise of ensuring that the elastic member 50 is respectively in contact with the ring 71 and the washer 60, it is possible to avoid interference between the part of the push rod 10 with a large radial offset and the inner circumference of the washer 60 far from the groove bottom 211 of the accommodating groove 21. The washer 60 is prevented from being damaged due to interference with the push rod 10, thereby affecting the uniform dispersion effect of the elastic force of the washer 60 on the elastic member 50. In this way, the reliability of the pedal assembly 100 of the present application is guaranteed.

[0205] Therefore, based on the definitions of the above embodiments, the pedal assembly 100 of the present application receives the pedal driving force transmitted sequentially through the foot pedal and the pedal arm through the push rod 10, and pushes the piston 20 to slide in the piston cavity 31 of the pedal box 30 based on the pedal driving force, so that the piston 20 can move relative to the displacement of the piston cavity 31 and compress the sealed space, and the pressure sensor and displacement sensor of the pedal assembly 100 detect and output control signals. In this way, the pedal assembly 100 detects the user's braking operation and outputs a corresponding control signal.

[0206] The pedal assembly 100 of the present application also forms a certain contact area with the receiving groove 21 and the second end 10b of the push rod 10 received in the receiving groove 21 by means of the retaining ring 40 embedded in the annular groove 22 along the axial direction of the push rod 10, and the limiting structure of the retaining ring 40 relative to the second end 10b of the push rod 10 is relatively stable, so as to prevent the push rod 10 from falling off relative to the receiving groove 21 during the process of sliding toward the notch 212 of the receiving groove 21. In addition, during the long-term operation of the pedal assembly 100, the second end 10b of the push rod 10 is kept received in the receiving groove 21, thereby improving the reliability of the pedal assembly 100.

[0207] On the other hand, the pedal assembly 100 is provided with a circumferential notch 41 on the retaining ring 40, and the retaining ring 40 can close the circumferential notch 41 under the action of the circumferential driving force to adjust the radial size of the retaining ring 40, so as to facilitate the installation of the retaining ring 40, thereby improving the installation efficiency of the pedal assembly 100. It is also convenient to replace the retaining ring 40 when the retaining ring 40 is damaged, thereby improving the maintenance efficiency of the pedal assembly 100.

[0208] Based on the pedal assembly 100 of the present application, the retaining ring 40 is embedded in the annular groove 22, so that when the retaining ring 40 slides toward the notch 212 of the receiving groove 21, the limiting structure of the retaining ring 40 relative to the second end 10b of the push rod 10 is relatively stable, so as to ensure the relative position of the second end 10b of the push rod 10 during the long-term operation of the pedal assembly 100, thereby improving the reliability of the pedal assembly 100. When the pedal assembly 100 of the present application is applied to a vehicle, the control signal output by the pedal assembly 100 of the present application can act on the brake motor 1004 of the brake device 1002, and the brake motor 1004 drives the friction plate in the brake 1005 to resist the brake disc 1003, thereby realizing the braking function of the vehicle. The improvement of the reliability of the pedal assembly 100 also improves the braking reliability of the vehicle, making the braking of the vehicle more reliable and improving the safety performance of the vehicle.

[0209] The pedal assembly 100 of the present application can also be applied to a pedal simulator, and the present application does not impose any particular limitation on this.

[0210] In one embodiment, the outer peripheral wall of one piston 20 includes another annular groove, and the other annular groove is used to accommodate a sealing ring 81, and the sealing ring 81 is used to seal the gap between one piston 20 and the cavity wall of one piston cavity 31. The axis of the sealing ring 81 coincides with the axis of the push rod 10. Along the radial direction of the push rod 10, the outer peripheral surface of the sealing ring 81 is used to abut the cavity wall of the piston cavity 31, and the inner peripheral surface of the sealing ring 81 is used to abut the groove bottom of another annular groove to cover the gap between the outer peripheral wall of the piston 20 and the cavity wall of the piston cavity 31.

[0211] In one embodiment, the axis of the piston cavity 31 coincides with the axis of the push rod 10. Along the axial direction of the push rod 10, the two ends of the piston cavity 31 include an opening 311 and a connection port 312, and the orientation of the opening 311 of the piston cavity 31 is the same as the orientation of the notch 212 of the receiving groove 21 of the piston 20. That is, the second end 10b of the push rod 10 passes through the opening 311 of the piston cavity 31 and the notch 212 of the receiving groove 21 in sequence and then abuts against the groove bottom 211 of the receiving groove 21. Along the radial direction of the push rod 10, the inner diameter of the piston cavity 31 is greater than the outer diameter of the piston 20.

[0212] Please see Fig.21 ,in Fig.21A schematic diagram of a partial exploded structure of a pedal assembly 100 provided in an embodiment of the present application.

[0213] like Fig.21 As shown, the pedal assembly 100 of the present application also includes a connecting ring 82, which is sleeved outside the piston 20. The axis of the connecting ring 82 coincides with the axis of the push rod 10. Along the radial direction of the push rod 10, the inner circumferential wall of the connecting ring 82 is used to abut the outer circumferential wall of the piston 20, and the outer circumferential wall of the connecting ring 82 is used to fix the connecting port 312 connected to the piston chamber 31. The connecting port 312 is used to be connected to the remaining structure of the pedal assembly 100 to form a sealed space on the side of the piston 20 away from the opening 311 of the piston chamber 31 along the axial direction of the push rod 10. In one embodiment, the pressure sensor of the pedal assembly 100 is located in the sealed space. In one embodiment, along the axial direction of the push rod 10, the connecting ring 82 and the opening 311 of the piston chamber 31 are arranged at intervals, and the displacement sensor of the pedal assembly 100 is located between the connecting ring 82 and the opening 311 of the piston chamber 31.

[0214] In one embodiment, the pedal assembly 100 of the present application further includes a sealing ring 81, and an annular groove 821 is provided on the inner circumference of the connecting ring 82. The annular groove 821 is used to accommodate the sealing ring 81, and the axis of the sealing ring 81 coincides with the axis of the push rod 10. Along the radial direction of the push rod 10, the outer circumference of the sealing ring 81 is used to abut the bottom of the annular groove 821, and the inner circumference of the sealing ring 81 is used to abut the outer circumferential wall of the piston 20 to cover the gap between the outer circumferential wall of the piston 20 and the inner circumferential wall of the connecting ring 82.

[0215] In one embodiment, the pedal assembly 100 of the present application further includes a support bearing 83, which is sleeved outside the piston 20. The axis of the support bearing 83 coincides with the axis of the push rod 10. Along the radial direction of the push rod 10, the inner ring of the support bearing 83 is used to be fixed to the outer peripheral surface of the piston 20, and the outer ring of the support bearing 83 is used to be fixedly connected to the inner peripheral wall of the piston cavity 31. Along the axial direction of the push rod 10, the support bearing 83 and the connecting ring 82 are arranged at intervals, and the support bearing 83 is closer to the opening 311 of the piston cavity 31 than the connecting ring 82. The support bearing 83 is used to cooperate with the connecting ring 82 to limit the radial position of the piston 20.

[0216] In one embodiment, the pedal assembly 100 of the present application further includes a dust cover 90, the axis of which coincides with the axis of the push rod 10. Along the axial direction of the push rod 10, one end of the dust cover 90 is used to be sleeved and fixed on the opening 311 of the piston cavity 31, and the other end of the dust cover 90 is used to be sleeved and fixed on the push rod 10. That is, the second end 10b of the push rod 10 passes through the dust cover 90, the opening 311 of the piston cavity 31, and the notch 212 of the receiving groove 21 in sequence, and then abuts against the groove bottom 211 of the receiving groove 21. The dust cover 90 is used to prevent external impurities from entering the piston cavity 31 and the receiving groove 21 through the opening 311 of the piston cavity 31.

[0217] In one embodiment, along the axial direction of the push rod 10, the first end 10a of the push rod 10 includes a connecting ball head 12, and the connecting ball head 12 is used to abut the middle part of the pedal arm of the pedal assembly 100. During the user's braking operation, the pedal arm rotates under the action of the pedal driving force received by the foot pedal, and the connecting ball head 12 is used to receive the pedal driving force transmitted by the pedal arm and transmit the pedal driving force to the ball head 11. Under the action of the pedal driving force, the ball head 11 pushes the piston 20 to slide along the axial direction of the push rod 10 in the piston cavity 31. The pedal assembly 100 outputs a control signal to the outside based on the sliding of the piston 20.

[0218] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of protection of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A pedal assembly for a dry brake device, characterized in that: The pedal assembly includes a push rod and a piston, one end of the push rod is used to receive the pedal driving force, and the piston includes a receiving groove, and the receiving groove is used to receive the other end of the push rod, wherein: The groove wall of the accommodating groove includes an annular groove, and the annular groove is used to embed a retaining ring with a circumferential notch, and the length of the circumferential notch of the retaining ring is less than half of the circumferential length of the retaining ring.

2. The pedal assembly according to claim 1, characterized in that: Along the axial direction of the push rod, the groove wall of the accommodating groove is divided into two sections with the annular groove as the boundary, one section is arranged between the notch of the accommodating groove and the other section, wherein: The inner diameter of the one section is larger than the inner diameter of the other section and smaller than the outer diameter of the one retaining ring; the inner diameter of the other section is larger than the inner diameter of the one retaining ring.

3. The pedal assembly according to claim 2, characterized in that: The end of the section away from the annular groove along the axial direction of the push rod includes a tapered groove wall, and the inner diameter of the tapered groove wall gradually decreases from the notch of the accommodating groove to the annular groove.

4. The pedal assembly according to claim 2, characterized in that: The one retaining ring comprises two through holes, the two through holes are respectively located at two ends of the one retaining ring along the circumference of the one push rod, and the two through holes are used to receive a circumferential driving force to close the circumferential notch of the one retaining ring, wherein: When the circumferential notch is closed along the circumference of the push rod, the outer diameter of the retaining ring is smaller than the inner diameter of the section of the accommodating groove, and the inner diameter of the retaining ring is larger than the outer diameter of the push rod.

5. The pedal assembly according to any one of claims 1 to 4, characterized in that: The other end of the push rod includes a ball head, and the ball head is used to push the piston to move along the first direction through the bottom of the receiving groove, wherein: The bottom of the receiving groove is conical, and the inner diameter of the bottom of the receiving groove gradually increases toward the annular groove along the axial direction of the push rod; The taper of the bottom of the accommodating groove is greater than or equal to 100°.

6. The pedal assembly according to any one of claims 1 to 4, characterized in that: The one receiving groove is used to receive an elastic member, and the one retaining ring along the axial direction of the one push rod is used to push the one ball head at the other end to abut against the bottom of the one receiving groove through the one elastic member, wherein: Along the radial direction of the push rod, the elastic member is used to be sleeved outside the push rod, the outer diameter of the elastic member is larger than the inner diameter of the retaining ring, and the inner diameter of the elastic member is smaller than the outer diameter of the ball head.

7. The pedal assembly according to claim 6, characterized in that: The elastic member is tapered, and along the axial direction of the push rod, the outer diameter of one end of the elastic member facing the retaining ring is greater than the outer diameter of the other end.

8. The pedal assembly according to claim 6, characterized in that: During the resetting process of the piston, the bottom of the receiving groove pushes an elastic member through the ball head to squeeze a gasket toward the retaining ring, wherein: Along the radial direction of the push rod, the washer is used to be sleeved outside the push rod, and the outer diameter of the washer is larger than the inner diameter of the elastic member and larger than the inner diameter of the retaining ring; The washer along the circumference of the push rod is used to cover the circumferential notch of the retaining ring.

9. The pedal assembly according to claim 8, characterized in that: The thickness of the washer along the axial direction of the push rod is greater than or equal to the thickness of the retaining ring.

10. The pedal assembly according to claim 8, characterized in that: The one receiving groove is used to receive a bushing, the one bushing includes a ring and an axial protrusion, and during the resetting process of the one piston, the bottom of the one receiving groove pushes the one ring toward the one retaining ring through the one ball head to squeeze the one elastic member, wherein: The axial protrusion is used to surround the elastic member along the radial direction of the push rod, and the inner diameter of the axial protrusion is smaller than the outer diameter of the washer; One end of the axial protrusion along the axial direction of the push rod is used to connect to the end surface of the ring member facing the retaining ring, and the distance between the other end of the axial protrusion and the washer is less than the maximum compression amount of the elastic member.

11. The pedal assembly according to claim 10, characterized in that: Along the radial direction of the push rod, the gap between the one axial protrusion and the one elastic member is smaller than the gap between the one axial protrusion and the groove wall of the one accommodating groove.

12. The pedal assembly according to claim 10, characterized in that: In the radial direction of the push rod, the inner hole diameter of the one ring is smaller than the inner hole diameter of the one washer.

13. The pedal assembly according to any one of claims 1 to 4, characterized in that: The pedal assembly includes a pedal box and a pressure sensor, wherein the pedal box includes a piston chamber, and the piston chamber is used to accommodate the piston, wherein: The other end along the axial direction of the push rod is used to push the piston to slide in the piston chamber; The one pressure sensor is used to detect the pressure change in the one piston chamber and output a control signal to brake the vehicle; The outer peripheral wall of the one piston comprises another annular groove, and the other annular groove is used to accommodate a sealing ring, and the one sealing ring is used to seal the gap between the one piston and the cavity wall of the one piston cavity.

14. A braking system, characterized in that: The braking system comprises at least one electromechanical brake device and a pedal assembly as claimed in any one of claims 1 to 13, each of the electromechanical brake devices being used to brake a wheel in response to a control signal output by the pedal assembly.

15. A vehicle, characterized in that: The vehicle comprises: multiple wheels; and The braking system of claim 14, wherein each of said electromechanical braking devices is used to brake one of said wheels.

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