Brake execution device and vehicle

Abstract

The embodiment of the utility model provides a brake execution device and a vehicle, the brake execution device comprises a driving assembly, a feeding assembly and an execution assembly, the driving assembly comprises a rotatable output piece, and the execution assembly comprises a friction plate; the feeding assembly comprises a motion conversion mechanism and a pushing piece used for pushing the friction plate, and the motion conversion mechanism is connected with the output piece and the pushing piece and is configured to convert rotation of the output piece into movement of the pushing piece; the driving assembly and the feeding assembly are of a split structure and are detachably connected, and the feeding assembly and the executing assembly are of a split structure and are detachably connected. In the embodiment of the invention, when the brake execution devices of different models are developed and manufactured, only specific components need to be developed, manufactured and replaced, the whole brake execution device does not need to be developed and manufactured again, and the development and manufacturing cost can be reduced.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of braking, and particularly relate to a brake execution device and a vehicle. BACKGROUND

[0002] The electronic mechanical brake execution device realizes braking by driving the brake caliper through the motor, and has the advantages of fast response and convenient maintenance compared with the traditional hydraulic brake execution device.

[0003] In the related art, the electronic mechanical brake execution device includes a driving part and an execution part, the driving part includes a motor and an output shaft rotating in output, and the execution part is integrated with a friction plate, a shell and a transmission mechanism for converting the rotation of the output shaft into axial movement.

[0004] In view of different requirements, different models of electronic mechanical brake execution devices need to be redeveloped and manufactured, which is high in development and manufacturing cost. CONTENT OF THE UTILITY MODEL

[0005] Embodiments of the present application provide a brake execution device and a vehicle, aiming at improving the problem that different models of electronic mechanical brake execution devices need to be redeveloped and manufactured in view of different requirements, which is high in development and manufacturing cost.

[0006] In a first aspect, the embodiments of the present application provide a brake execution device, including a driving assembly, a feeding assembly and an execution assembly, the driving assembly includes a rotatable output member, and the execution assembly includes a friction plate;

[0007] The feeding assembly includes a motion conversion mechanism and a pushing member for pushing the friction plate, the motion conversion mechanism is connected with the output member and the pushing member, and is configured to convert the rotation of the output member into the movement of the pushing member in a first direction;

[0008] The driving assembly and the feeding assembly are in a split structure and can be detachably connected, and the feeding assembly and the execution assembly are in a split structure and can be detachably connected.

[0009] According to the above technical means, the brake execution device adopts a modular design, the brake execution device is split into a driving assembly, a feeding assembly and an execution assembly, each assembly can be independently detached and replaced, and when developing and manufacturing different models of brake execution devices, only specific assemblies need to be developed, manufactured and replaced, without the need to redevelop and manufacture the entire brake execution device, thereby reducing the development and manufacturing cost. In addition, the driving assembly and the feeding assembly are detachably connected, and the feeding assembly and the execution assembly are detachably connected, so that the brake execution device is convenient to disassemble and maintain. In addition, when a certain assembly fails, only the corresponding assembly needs to be replaced, without the need to replace the entire brake execution device, thereby reducing the maintenance cost.

[0010] Optionally, the execution assembly comprises a first housing, the friction plate is located in the first housing, the feeding assembly comprises a second housing, the motion conversion mechanism is located in the second housing, and the first housing is detachably connected with the second housing.

[0011] According to the technical means, the first housing in the execution assembly plays a protection role, the second housing in the feeding assembly is detachably connected with the first housing, and detachable connection of the feeding assembly and the execution assembly is realized.

[0012] Optionally, the second housing at least partially extends into the first housing.

[0013] The part of the second housing extending into the first housing comprises a matching part, the first housing is provided with a matching cavity, the matching part is matched with the matching cavity to limit the relative position of the first housing and the second housing in a second direction and a third direction, the second direction and the third direction are perpendicular to each other and perpendicular to the first direction.

[0014] An end of the matching part is provided with a first limiting surface, and an end of the matching cavity is provided with a second limiting surface, the first limiting surface is in contact with the second limiting surface to limit the relative position of the first housing and the second housing in the first direction.

[0015] According to the technical means, when the first housing and the second housing are assembled, the relative position of the first housing and the second housing can be limited, and the position of the second housing relative to the first housing during assembly is ensured to be accurate.

[0016] Optionally, the execution assembly further comprises a fixed support, and the friction plate is movably connected to the fixed support.

[0017] The friction plate comprises an inner friction plate and an outer friction plate, the pusher is used for pushing the inner friction plate, and the first housing further comprises a hook, and the hook is used for pushing the outer friction plate.

[0018] The fixed support is movably provided with a guide, a moving direction of the guide is parallel to the first direction, and the second housing further comprises a connecting arm, and the connecting arm is detachably connected with the guide.

[0019] According to the technical means, the second housing and the first housing are reversely moved by reaction force, so that the outer friction plate moves towards the brake disc, and the outer friction plate does not need to be driven by an additional driving structure to move, which is beneficial to reducing the weight and volume of the brake execution device.

[0020] Optionally, the driving assembly comprises a driving member and a speed reduction assembly, and the driving member and the speed reduction assembly are in a split structure and are detachably connected.

[0021] According to the technical means, different driving members can be used in cooperation with different speed reduction assemblies to meet different requirements. When developing and manufacturing different models of brake execution devices including different driving members and / or speed reduction assemblies, a brand new brake execution device does not need to be developed. Instead, only the driving member and / or the speed reduction assembly need to be developed and manufactured, which can further reduce the development and manufacturing costs.

[0022] Optionally, the speed reduction assembly includes a first gear reduction mechanism and a second gear reduction mechanism connected in sequence, the driving member is connected with the first gear reduction mechanism, and the output member is a gear in the second gear reduction mechanism.

[0023] According to the technical means, the speed reduction assembly adopts a two-stage speed reduction scheme, which can reduce the weight and the size in the first direction of the brake execution device compared with a three-stage speed reduction scheme, and facilitates the arrangement of the brake execution device.

[0024] Optionally, the speed reduction assembly further includes a third housing, the third housing includes a first sub-housing and a second sub-housing, and the first sub-housing and the second sub-housing are in a split structure and can be detachably connected.

[0025] According to the technical means, the assembly and maintenance of the first gear reduction mechanism and the second gear reduction mechanism are facilitated.

[0026] Optionally, the first sub-housing and the second sub-housing enclose a cavity, the cavity includes a first cavity and a second cavity;

[0027] The first gear reduction mechanism and the second gear reduction mechanism are located in the first cavity;

[0028] The driving member includes a wire outlet terminal, the first sub-housing is provided with a socket electrically connected with the wire outlet terminal, and the wire outlet terminal is located in the second cavity.

[0029] According to the technical means, the wire outlet terminal is isolated from the first gear reduction mechanism and the second gear reduction mechanism, which can prevent the lubricating oil from penetrating to the wire outlet terminal, so as to ensure the reliability of the electrical connection.

[0030] Optionally, the motion conversion mechanism includes a lead screw and a moving nut, and the moving nut is connected with the pushing member.

[0031] The lead screw includes a first rotating section matched with the moving nut and a second rotating section connected with the output member, a stepped surface is arranged at the connection between the first rotating section and the second rotating section, and the feeding assembly further includes a force sensing structure sleeved on the second rotating section, the force sensing structure is arranged between the stepped surface and the second housing in the feeding assembly in the first direction.

[0032] According to the above technical means, by arranging the force sensing structure, the clamping force of the friction plate on the brake disc can be monitored in real time, so that the control unit adjusts the output of the driving member according to the size of the clamping force, thereby realizing accurate adjustment of the clamping force.

[0033] In a second aspect, the embodiments of the present application provide a vehicle comprising the brake execution device as described above. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 A front view schematic diagram of the brake execution device provided by the embodiments of the present application;

[0035] Figure 2 A rear view schematic diagram of the brake execution device provided by the embodiments of the present application;

[0036] Figure 3 A left view schematic diagram of the brake execution device provided by the embodiments of the present application;

[0037] Figure 4 A top view schematic diagram of the brake execution device provided by the embodiments of the present application;

[0038] Figure 5 A cross-sectional view schematic diagram of the brake execution device provided by the embodiments of the present application Figure 1 ;

[0039] Figure 6 A cross-sectional view schematic diagram of the brake execution device provided by the embodiments of the present application Figure 2 ;

[0040] Figure 7 A structure schematic diagram of the driving member in the brake execution device provided by the embodiments of the present application Figure 1 ;

[0041] Figure 8 A structure schematic diagram of the driving member in the brake execution device provided by the embodiments of the present application Figure 2 ;

[0042] Figure 9 A structure schematic diagram of the speed reduction assembly in the brake execution device provided by the embodiments of the present application Figure 1 ;

[0043] Figure 10 A structure schematic diagram of the speed reduction assembly in the brake execution device provided by the embodiments of the present application Figure 2 ;

[0044] Figure 11 A cross-sectional view schematic diagram of the speed reduction assembly in the brake execution device provided by the embodiments of the present application;

[0045] Figure 12A structure schematic view of the feeding assembly in the brake execution device provided by the embodiment of the present application is shown in the figure;

[0046] Figure 13 A structure schematic view of the feeding assembly in the brake execution device provided by the embodiment of the present application is shown in the figure;

[0047] Figure 14 A structure schematic view of the execution assembly in the brake execution device provided by the embodiment of the present application is shown in the figure;

[0048] Figure 15 A structure schematic view of the execution assembly in the brake execution device provided by the embodiment of the present application is shown in the figure.

[0049] Explanation of reference signs:

[0050] 1-driving assembly, 11-driving piece, 111-outlet terminal, 112-rotating shaft, 113-casing, 114-machine body, 12-reduction assembly, 121-first gear reduction mechanism, 1211-first gear, 1212-second gear, 122-second gear reduction mechanism, 1221-third gear, 1222-fourth gear, 123-third casing, 1231-first sub-casing, 1232-second sub-casing, 124-first cavity, 125-second cavity, 126-plug, 127-mounting shaft, 128-rolling bearing, 129-sealing gasket, 2-feeding assembly, 21-motion conversion mechanism, 211-screw rod, 2111-first rotating section, 2112-second rotating section, 212-moving nut, 213-rolling ball, 22-pushing piece, 23-second casing, 231-matching part, 232-first limiting surface, 233-connecting arm, 24-force sensing structure, 241-first gasket, 242-thrust bearing, 243-second gasket, 244-force sensor, 25-bushing, 26-open block ring, 27-sealing ring, 28-dust cover, 29-first bolt, 3-execution assembly, 31-friction plate, 311-inner friction plate, 312-outer friction plate, 32-first casing, 321-matching cavity, 322-second limiting surface, 323-hook, 33-fixing support, 34-guiding piece, 35-guiding piece dust cover, 36-first spring piece, 37-second spring piece, 4-second bolt, 5-brake disc. DETAILED DESCRIPTION

[0051] In order to make the technical problems, technical solutions and beneficial effects solved by the present application clearer, the present application is further described in detail below in combination with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0052] Reference Figures 1 to 6The brake executing device provided by the embodiment of the present application comprises a driving assembly 1, a feeding assembly 2 and an executing assembly 3, the driving assembly 1 comprises a rotatable output member, the executing assembly 3 comprises a friction plate 31, the feeding assembly 2 comprises a motion conversion mechanism 21 and a pushing member 22 for pushing the friction plate 31, the motion conversion mechanism 21 is connected with the output member and the pushing member 22 and is configured to convert the rotation of the output member into the movement of the pushing member 22 in a first direction, and the driving assembly 1 and the feeding assembly 2 are in a split structure and can be detachably connected, and the feeding assembly 2 and the executing assembly 3 are in a split structure and can be detachably connected.

[0053] The brake executing device is specifically an electronic mechanical brake executing device, and the brake executing device is applied to a vehicle, and the vehicle comprises a brake disc 5. The design scheme of the electronic mechanical brake executing device includes an axle control type scheme and a wheel control type scheme, the control unit in the axle control type scheme is in units of axles, the control unit is arranged on the axle, and one control unit corresponds to two wheel end brakes on one axle, and the control unit in the wheel control type scheme is in units of single wheels, and each wheel corresponds to an independent control unit. The control unit comprises a PCB (Printed Circuit Board).

[0054] The brake executing device provided by the present application adopts the axle control type scheme, compared with the wheel control type scheme, the axle control type scheme changes the arrangement of the PCB, the PCB accommodating cavity and the corresponding heat dissipation structure from the wheel end to the axle, that is, the brake executing device installed at the wheel end itself does not have the PCB, the PCB accommodating cavity and the corresponding heat dissipation structure, which can reduce the weight of the brake executing device, for example, the weight of a single brake executing device can be reduced by more than 10%, can reduce the volume of the brake executing device, thereby reducing the volume of the wheel end and improving the matching degree of different vehicle models.

[0055] The driving assembly 1 comprises a driving member 11, and the driving member 11 is an electric control type driving member, for example, a motor. The driving assembly 1 can further comprise a speed reduction assembly 12, and in this case, the output member is a component in the speed reduction assembly 12, for example, a gear, a shaft or the like. The driving member 11 and the speed reduction assembly 12 can be in a split structure, and in this case, the driving member 11, the speed reduction assembly 12, the feeding assembly 2 and the executing assembly 3 are assembled in sequence to form the electronic mechanical brake executing device.

[0056] The friction plate 31 can comprise an inner friction plate 311 and an outer friction plate 312, and in this case, the pushing member 22 is used to directly push the inner friction plate 311, and the inner friction plate 311 moves along the first direction and towards the brake disc 5 under the pushing of the pushing member 22 to abut against the brake disc 5. The motion conversion mechanism 21 can adopt a ball screw pair, the first direction is parallel to the axial direction of the ball screw pair, and the first direction can be referred to as the axial direction of the ball screw pair. Figure 3 and Figure 4The driving assembly 1 and the feeding assembly 2 can be connected by clamping, bolt connection or the like. The feeding assembly 2 and the executing assembly 3 can be connected by clamping, bolt connection or the like.

[0057] The brake executing device provided by the embodiment is modularized, the connection structure between the components is fixed, the universality of the individual components is high, and a specific component can be freely replaced to meet different requirements. In the embodiment, the brake executing device is modularized, the brake executing device is divided into the driving assembly 1, the feeding assembly 2 and the executing assembly 3, each component can be independently disassembled and replaced, and when different models of brake executing devices are developed and manufactured, only the specific components need to be developed, manufactured and replaced, without the need to redevelop and manufacture the entire brake executing device, so that the development and manufacturing costs can be reduced, and the procurement cost of the user can be reduced. In addition, the driving assembly 1 and the feeding assembly 2 are detachably connected, and the feeding assembly 2 and the executing assembly 3 are detachably connected, so that the brake executing device is convenient to disassemble and maintain. In addition, when a component fails, only the corresponding component needs to be replaced, without the need to replace the entire brake executing device, so that the maintenance cost can be reduced.

[0058] In some embodiments, referring to Figure 3 , Figure 4 , Figure 6 , Figure 13 and Figure 15 , the executing assembly 3 includes a first housing 32, the friction plate 31 is located in the first housing 32, the feeding assembly 2 includes a second housing 23, the motion conversion mechanism 21 is located in the second housing 23, and the first housing 32 and the second housing 23 are detachably connected.

[0059] The second housing 23 has a circumferentially closed cavity, the circumferential direction is consistent with the circumferential direction of the lead screw 211 in the motion conversion mechanism 21, and the motion conversion mechanism 21 is located in the cavity of the second housing 23. The first housing 32 and the second housing 23 are specifically connected by a plurality of second bolts 4, the first housing 32 is provided with a through hole, and the second housing 23 is provided with a first threaded hole. In the embodiment, the first housing 32 in the executing assembly 3 plays a protective role, the second housing 23 in the feeding assembly 2 is detachably connected with the first housing 32, and the detachable connection of the feeding assembly 2 and the executing assembly 3 is realized.

[0060] In some embodiments, referring to Figure 5 , Figure 6 , Figure 12 and Figure 15The second shell 23 at least partially extends into the first shell 32; the part of the second shell 23 extending into the first shell 32 comprises a matching part 231, the first shell 32 is provided with a matching cavity 321, the matching part 231 and the matching cavity 321 match to limit the relative position of the first shell 32 and the second shell 23 along the second direction and the third direction, the second direction and the third direction are perpendicular to the first direction; the end of the matching part 231 is provided with a first limiting surface 232, the end of the matching cavity 321 is provided with a second limiting surface 322, the first limiting surface 232 and the second limiting surface 322 are in contact to limit the relative position of the first shell 32 and the second shell 23 along the first direction.

[0061] The second direction can refer to the direction shown by the B arrow in Figure 3 and Figure 6 The third direction is consistent with the length direction of the friction plate 31, and the third direction can refer to the direction shown by the C arrow in Figure 4 and Figure 6 Along the second direction, the matching part 231 can sequentially comprise a first sub-part, a second sub-part and a third sub-part, the second sub-part is located between the first sub-part and the third sub-part, the first sub-part is used to be connected with the first shell 32, the first threaded hole is opened on the first sub-part, and the two ends of the second sub-part protrude along the third direction. The connection between the first sub-part and the second sub-part is provided with a first stepped assembly surface, and the connection between the second sub-part and the third sub-part is provided with a second stepped assembly surface.

[0062] The shape of the matching cavity 321 matches the shape of the matching part 231, the matching cavity 321 has a second stepped assembly surface in contact with the first stepped assembly surface and a third stepped assembly surface in contact with the second stepped assembly surface. The matching cavity 321 also has an assembly surface in contact with the two end surfaces of the second sub-part. When the first shell 32 and the second shell 23 are assembled, the inner wall of the matching cavity 321 can be uniformly smeared with lubricating grease, which plays a role in waterproof and dustproof. The matching between the inner wall of the matching cavity 321 and the matching part 231 except the surfaces that need to be in contact can be gap matching.

[0063] When the first shell 32 and the second shell 23 are assembled, the second shell 23 is pushed into the first shell 32, during the pushing process, the matching part 231 and the matching cavity 321 match, until the first limiting surface 232 and the second limiting surface 322 are in contact, the pushing is stopped, and the first shell 32 and the second shell 23 are connected together through the plurality of second bolts 4.

[0064] In the embodiment, when the first shell 32 and the second shell 23 are assembled, the relative position of the first shell 32 and the second shell 23 can be limited, the position of the second shell 23 relative to the first shell 32 during assembly is ensured to be accurate, and the subsequent assembly of the second bolt 4 is ensured to be smooth.

[0065] In some embodiments, refer to Figures 12 to 15The execution assembly 3 further comprises a fixed support 33, and the friction plate 31 is movably connected to the fixed support 33; the friction plate 31 comprises an inner friction plate 311 and an outer friction plate 312, the pushing piece 22 is used for pushing the inner friction plate 311, and the first shell 32 further comprises a hook 323 used for pushing the outer friction plate 312; the fixed support 33 is movably provided with a guide piece 34, the moving direction of the guide piece 34 is parallel to the first direction, and the second shell 23 further comprises a connecting arm 233 which is detachably connected with the guide piece 34.

[0066] The two ends of the inner friction plate 311 are connected with the fixed support 33 through a first spring sheet 36, and the two ends of the outer friction plate 312 are connected with the fixed support 33 through a second spring sheet 37. The first spring sheet 36 and the second spring sheet 37 can be symmetrically arranged. When it is needed to release the brake, the rotating shaft 112 of the driving piece 11 reversely rotates, the moving nut 212 moves away from the brake disc 5, the pushing piece 22 is driven to move away from the brake disc 5, and under the action of the first spring sheet 36 and the second spring sheet 37, the inner friction plate 311 and the outer friction plate 312 move away from the brake disc 5, so as to be reset. The guide piece 34 is further connected with a guide piece dust cover 35. The end of the guide piece 34 away from the fixed support 33 is provided with a second threaded hole, and the connecting arm 233 is threadedly connected with the second threaded hole in the guide piece 34 through the first bolt 29. The guide piece 34 can be a guide pin, and the axial direction of the guide pin is consistent with the first direction. The second shell 23 and the first shell 32 can move along the first direction.

[0067] When the moving nut 212 moves along the first direction and towards the brake disc 5, the pushing piece 22 is driven to move along the first direction and towards the brake disc 5, when the pushing piece 22 pushes the inner friction plate 311 to move towards the brake disc 5, the pushing piece 22 has an acting force on the inner friction plate 311, the pushing piece 22 will receive a reaction force from the inner friction plate 311 and transmit the reaction force to the moving nut 212, the moving nut 212 transmits the reaction force to the lead screw 211, the lead screw 211 transmits the reaction force to the second shell 23, the second shell 23 moves away from the brake disc 5, the second shell 23 drives the first shell 32 to move, when the first shell 32 moves, the hook 323 pushes the outer friction plate 312, so that the outer friction plate 312 moves towards the brake disc 5 to abut against the brake disc 5, so that the inner friction plate 311 and the outer friction plate 312 jointly clamp the brake disc 5. In the above process, the moving direction of the second shell 23 and the first shell 32 is opposite to the moving direction of the pushing piece 22.

[0068] In the embodiment, the second shell 23 and the first shell 32 reversely move by the reaction force, so that the outer friction plate 312 moves towards the brake disc 5, without the need of an additional driving structure to drive the outer friction plate 312 to move, which is conducive to reducing the weight and the size of the brake execution device.

[0069] In some embodiments, referring to Figures 3 to 5 , the driving assembly 1 comprises a driving member 11 and a speed reduction assembly 12, the driving member 11 and the speed reduction assembly 12 are in a split structure and detachably connected.

[0070] The connection mode of the driving member 11 and the speed reduction assembly 12 can be bolted connection, clamping, etc. The driving member 11 is a motor, referring to Figure 7 and Figure 8 , the driving member 11 comprises a rotating shaft 112, a casing 113 and a machine body 114, the casing 113 is arranged outside the machine body 114, and the rotating shaft 112 is connected with the machine body 114. The speed reduction assembly 12 comprises a third housing 123. The third housing 123 comprises a first sub-housing 1231 and a second sub-housing 1232, the casing 113 and the second sub-housing 1232 are detachably connected, for example, bolted connection. Through the connection of the casing 113 and the second sub-housing 1232, the fixing of the driving member 11 can be realized.

[0071] In the embodiment, different driving members 11 can be used with different speed reduction assemblies 12 to meet different needs. When developing and manufacturing different models of brake execution devices including different driving members 11 and / or speed reduction assemblies 12, there is no need to develop a brand new brake execution device, only the driving member 11 and / or the speed reduction assembly 12 need to be developed, manufactured and replaced, which can further reduce the development and manufacturing cost.

[0072] In some embodiments, referring to Figure 5 and Figure 11 , the speed reduction assembly 12 comprises a first gear reduction mechanism 121 and a second gear reduction mechanism 122 connected with each other, the driving member 11 is connected with the first gear reduction mechanism 121, and the output member is a gear in the second gear reduction mechanism 122.

[0073] The first gear reduction mechanism 121 comprises a first gear 1211 and a second gear 1212 engaged with each other, and the rotating shaft 112 is connected with the first gear 1211 through a spline structure. The second gear reduction mechanism 122 comprises a third gear 1221 and a fourth gear 1222 engaged with each other, the third gear 1221 is connected with the second gear 1212, the output member is the fourth gear 1222, and the fourth gear 1222 is connected with the lead screw 211 in the motion conversion mechanism 21 through a spline structure.

[0074] The first gear 1211, the second gear 1212, the third gear 1221 and the fourth gear 1222 can be provided with shaft segments, and the shaft segments of the first gear 1211, the second gear 1212, the third gear 1221 and the fourth gear 1222 are installed on the third housing 123 through the rolling bearings 128. The shaft segments of the first gear 1211, the second gear 1212, the third gear 1221 and the fourth gear 1222 are axially parallel to the axis of the driving member 11. The fourth gear 1222 is further connected with the mounting shaft 127, and the end of the mounting shaft 127 away from the fourth gear 1222 is installed on the third housing 123 through the rolling bearings 128.

[0075] In the related art, the volume and weight of the brake execution device are large, and the axial size is large. In the embodiment, the deceleration assembly 12 adopts a two-stage deceleration scheme, which can reduce the weight and the size in the first direction of the brake execution device, and facilitate the arrangement of the brake execution device. When the brake execution device adopts the above-mentioned deceleration assembly 12 and is arranged at the front wheel end, the size in the first direction is within 190 mm. In addition, the deceleration assembly 12 performs two-stage deceleration and torque increase on the output of the driving member 11, and a certain transmission ratio can be set to enable the driving member 11 to output smaller power to achieve the movement of the pusher 22 to push the friction plate 31, thereby reducing the demand for the output power of the driving member 11. It can be understood that the greater the output power of the driving member 11, the larger the size of the driving member 11 is generally. Therefore, by performing two-stage deceleration and torque increase on the output of the driving member 11 through the deceleration assembly 12, the size of the driving member 11 can be reduced.

[0076] In some embodiments, referring to Figures 9 to 11 , the deceleration assembly 12 further includes a third housing 123, and the third housing 123 includes a first sub-housing 1231 and a second sub-housing 1232. The first sub-housing 1231 and the second sub-housing 1232 are in a split structure and are detachably connected.

[0077] The sealing gasket 129 can be arranged between the abutting surfaces of the first housing 32 and the second housing 23 to ensure the sealing performance of the connection between the first housing 32 and the second housing 23. The second sub-housing 1232 is detachably connected with the second housing 23 of the feeding assembly 2, for example, by screwing. The sealing ring 27 is arranged between the second sub-housing 1232 and the second housing 23. The first sub-housing 1231 and the second sub-housing 1232 are connected by screwing. In the embodiment, the third housing 123 includes the first sub-housing 1231 and the second sub-housing 1232 which are detachably connected, facilitating the assembly and maintenance of the first gear deceleration mechanism 121 and the second gear deceleration mechanism 122.

[0078] In some embodiments, referring to Figure 5 ,Figure 8 、 Figure 10 and Figure 11 The first sub-housing 1231 and the second sub-housing 1232 enclose a cavity, the cavity comprising a first cavity 124 and a second cavity 125; the first gear reduction mechanism 121 and the second gear reduction mechanism 122 are located in the first cavity 124; the driving member 11 comprises a terminal 111, and the first sub-housing 1231 is provided with a socket 126 electrically connected with the terminal 111, and the terminal 111 is located in the second cavity 125.

[0079] The socket 126 is used to be electrically connected with a vehicle wire harness connector. The terminal 111 is electrically connected with the socket 126, and functions to transmit current and electrical signals. The volume of the second cavity 125 is much smaller than that of the first cavity 124. The first gear reduction mechanism 121 and the second gear reduction mechanism 122 need to be lubricated with lubricating grease during operation. In the embodiment, the first gear reduction mechanism 121 and the second gear reduction mechanism 122 are located in the first cavity 124, and the terminal 111 is located in the second cavity 125, so that the terminal 111 is isolated from the first gear reduction mechanism 121 and the second gear reduction mechanism 122, and the lubricating grease can be prevented from penetrating to the terminal 111, so as to ensure the reliability of the electrical connection.

[0080] In some embodiments, referring to Figure 13 The motion conversion mechanism 21 comprises a lead screw 211 and a moving nut 212, and the moving nut 212 is connected with the pushing member 22; the lead screw 211 comprises a first rotating section 2111 matched with the moving nut 212 and a second rotating section 2112 connected with the output member, and a stepped surface is arranged at the connection between the first rotating section 2111 and the second rotating section 2112; the feeding assembly 2 further comprises a force sensing structure 24 sleeved on the second rotating section 2112, and the force sensing structure 24 abuts between the stepped surface and the second housing 23 in the feeding assembly 2 along the first direction.

[0081] The motion conversion mechanism 21 further comprises a ball 213. The second rotating section 2112 is connected with the fourth gear 1222 through a spline structure at the end away from the moving nut 212, and through the spline structure, the torque output by the reduction assembly 12 can be transmitted to the ball screw pair. When the lead screw 211 rotates, the moving nut 212 moves along the first direction, and drives the pushing member 22 to move along the first direction. When the pushing member 22 moves along the first direction and towards the brake disc 5, the inner friction plate 311 moves towards the brake disc 5, so that the inner friction plate 311 abuts against the brake disc 5.

[0082] The dust cover 28 is arranged between the mobile nut 212 and the inner wall of the cavity of the second housing 23 near the end of the mobile nut 212 close to the pusher 22. The second rotating section 2112 penetrates the second housing 23 away from the end of the mobile nut 212, and the bushing 25 is arranged between the second rotating section 2112 and the second housing 23. The open check ring 26 is further arranged on the second rotating section 2112 and is located on the side of the second housing 23 away from the pusher 22. The open check ring 26 is used to limit the relative displacement of the second housing 23 and the lead screw 211 in the first direction.

[0083] The force sensing structure 24 includes the first gasket 241, the thrust bearing 242, the second gasket 243, and the force sensor 244. The force sensor 244 is abutted between the second gasket 243 and the inner wall of the cavity of the second housing 23. The second gasket 243 is abutted between the thrust bearing 242 and the force sensor 244. The thrust bearing 242 is abutted between the first gasket 241 and the second gasket 243. The first gasket 241 is abutted between the stepped surface and the thrust bearing 242. When the lead screw 211 rotates, the first gasket 241 rotates, and the second gasket 243 and the force sensor 244 do not rotate. The first gasket 241, the thrust bearing 242, and the second gasket 243 play a role in transmitting the force in the first direction. The thrust bearing 242 is arranged to prevent the second gasket 243 and the force sensor 244 from rotating.

[0084] When the inner friction plate 311 and the outer friction plate 312 jointly clamp the brake disc 5, the pusher 22 has an acting force on the inner friction plate 311. The pusher 22 will receive a counteracting force from the inner friction plate 311 and transmit the counteracting force to the mobile nut 212. The mobile nut 212 transmits the counteracting force to the lead screw 211. After the lead screw 211 receives the counteracting force, the lead screw 211 transmits the counteracting force to the force sensor 244 through the first gasket 241, the thrust bearing 242, and the second gasket 243. The size of the counteracting force can be sensed by the force sensor 244. The size of the counteracting force is basically consistent with the size of the clamping force of the friction plate 31 on the brake disc 5.

[0085] In this embodiment, the size of the clamping force of the friction plate 31 on the brake disc 5 can be monitored in real time by the arrangement of the force sensing structure 24. The control unit can adjust the output of the driving member 11 according to the size of the clamping force, so as to realize precise adjustment of the clamping force.

[0086] In some embodiments, the feed assembly 2 does not include a force sensing structure. Compared with the feed assembly 2 including the force sensing structure, the feed assembly 2 not including the force sensing structure has a smaller size in the first direction.

[0087] For different models of brake execution devices, the feeding assembly 2 including the force sensing structure or the feeding assembly 2 not including the force sensing structure can be selected according to actual needs. When the feeding assembly 2 not including the force sensing structure is used in the brake execution device, the size of the brake execution device in the first direction can be further reduced. By selecting different feeding assemblies 2, whether the brake execution device is configured with a force sensing function can be adjusted without making large-scale changes to the entire brake execution device.

[0088] The working principle of the above brake execution device is as follows:

[0089] The driving member 11 operates, the rotating shaft 112 rotates, the speed reduction assembly 12 performs two-stage speed reduction and torque increase on the rotation output by the rotating shaft 112, the torque output by the speed reduction assembly 12 is transmitted to the ball screw pair, when the screw rod 211 in the ball screw pair rotates, the moving nut 212 moves in the first direction and towards the brake disc 5, driving the pushing member 22 to move in the first direction and towards the brake disc 5, and the pushing member 22 pushes the inner friction plate 311 to move towards the brake disc 5, so that the inner friction plate 311 abuts against the brake disc 5.

[0090] When the moving nut 212 moves in the first direction and towards the brake disc 5, driving the pushing member 22 to move in the first direction and towards the brake disc 5, and the pushing member 22 pushes the inner friction plate 311 to move towards the brake disc 5, the pushing member 22 has a force acting on the inner friction plate 311, the pushing member 22 will be subjected to a reaction force of the inner friction plate 311 and transmit the reaction force to the moving nut 212, the moving nut 212 transmits the reaction force to the screw rod 211, and the screw rod 211 transmits the reaction force to the second housing 23, so that the second housing 23 moves away from the brake disc 5, and the first housing 32 moves driven by the second housing 23, when the first housing 32 moves, the hook claw 323 pushes the outer friction plate 312, so that the outer friction plate 312 moves towards the brake disc 5 to abut against the brake disc 5, so that the inner friction plate 311 and the outer friction plate 312 jointly clamp the brake disc 5, and braking is realized.

[0091] When the inner friction plate 311 and the outer friction plate 312 jointly clamp the brake disc 5, the pushing member 22 has a force acting on the inner friction plate 311, the pushing member 22 will be subjected to a reaction force of the inner friction plate 311 and transmit the reaction force to the moving nut 212, the moving nut 212 transmits the reaction force to the screw rod 211, and the screw rod 211 transmits the reaction force to the force sensor 244 through the first gasket 241, the thrust bearing 242 and the second gasket 243 after being subjected to the reaction force, and the size of the reaction force can be sensed by the force sensor 244, so that the size of the clamping force of the friction plate 31 on the brake disc 5 can be monitored.

[0092] The embodiment of the present application further provides a vehicle comprising the brake execution device. Since the vehicle comprises the brake execution device, the vehicle also has the beneficial effects of the brake execution device, which will not be repeated here.

[0093] In the present application, unless otherwise explicitly defined, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0094] The terms "first", "second", "third", "fourth" and the like (if any) in the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0095] The term "and / or" in the present application is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0096] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A brake actuating device, characterized by comprising: The drive assembly comprises a rotatable output member, the execution assembly comprises a friction plate; The feeding assembly comprises a motion conversion mechanism and a pushing member for pushing the friction plate, the motion conversion mechanism is connected with the output member and the pushing member, and is configured to convert the rotation of the output member into the movement of the pushing member in a first direction; The drive assembly and the feeding assembly are detachably connected in a split structure, and the feeding assembly and the execution assembly are detachably connected in a split structure.

2. The brake actuating apparatus according to claim 1, characterized by The execution assembly comprises a first housing, and the friction plate is located in the first housing; the feeding assembly comprises a second housing, and the motion conversion mechanism is located in the second housing; and the first housing and the second housing are detachably connected.

3. The brake actuating apparatus according to claim 2, characterized by The second housing at least partially extends into the first housing; The part of the second housing extending into the first housing comprises a matching part, the first housing is provided with a matching cavity, and the matching part and the matching cavity are matched to limit the relative positions of the first housing and the second housing in a second direction and a third direction, the second direction and the third direction being perpendicular to each other and both being perpendicular to the first direction; An end of the matching part is provided with a first limiting surface, an end of the matching cavity is provided with a second limiting surface, and the first limiting surface and the second limiting surface are in contact to limit the relative position of the first housing and the second housing in the first direction.

4. The brake actuating apparatus according to claim 2, characterized by The execution assembly further comprises a fixed support, and the friction plate is movably connected to the fixed support; The friction plate comprises an inner friction plate and an outer friction plate, the pushing member is used for pushing the inner friction plate, and the first housing further comprises a hook for pushing the outer friction plate; A guide member is movably arranged on the fixed support, the moving direction of the guide member is parallel to the first direction, the second housing further comprises a connecting arm, and the connecting arm is detachably connected with the guide member.

5. The brake actuating device according to any one of claims 1 to 4, characterized in that The drive assembly comprises a driving member and a speed reduction assembly, and the driving member and the speed reduction assembly are detachably connected in a split structure.

6. The brake actuating device according to claim 5, characterized in that The speed reduction assembly comprises a first gear reduction mechanism and a second gear reduction mechanism connected with each other, the driving member is connected with the first gear reduction mechanism, and the output member is a gear in the second gear reduction mechanism.

7. The brake actuating device according to claim 6, characterized in that The speed reduction assembly further comprises a third housing, and the third housing comprises a first sub-housing and a second sub-housing, which are detachably connected in a split structure.

8. The brake actuating apparatus according to claim 7, characterized by The first sub-housing and the second sub-housing enclose a cavity, and the cavity comprises a first cavity and a second cavity; The first gear reduction mechanism and the second gear reduction mechanism are located in the first cavity; The driving member comprises a wire terminal, the first sub-housing is provided with a socket electrically connected with the wire terminal, and the wire terminal is located in the second cavity.

9. The brake actuating apparatus according to any one of claims 1 to 4, characterized by The motion conversion mechanism comprises a lead screw and a moving nut, and the moving nut is connected with the pushing member; The lead screw comprises a first rotating section matched with the moving nut and a second rotating section connected with the output member, a step surface is arranged at the connection between the first rotating section and the second rotating section, the feeding assembly further comprises a force sensing structure sleeved on the second rotating section, and the force sensing structure is abutted between the step surface and a second housing in the feeding assembly along the first direction.

10. A vehicle characterized by comprising: The brake execution device according to any one of claims 1 to 9.

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