Brake locking device and brake caliper assembly

Abstract

The invention discloses a brake locking device and a brake caliper assembly, and belongs to the technical field of automobile brake systems, the brake locking device comprises an MGU shell, a transmission gear mechanism arranged on the MGU shell and a locking component used for locking the transmission gear mechanism for parking, a mounting cavity used for containing the locking component is formed in the MGU shell, and the MGU shell is internally provided with a brake caliper. The anti-collision device has the beneficial effects that radial impact is effectively reduced, meanwhile, impact noise can be effectively reduced, the strength and the impact resistance of the locking component are enhanced, heat in the locking component can be transmitted out in time, and therefore the anti-collision device has the advantages of being good in anti-collision performance, good in anti-collision performance, good in anti-collision performance, good in anti-collision performance, good in anti-collision performance, good in anti-collision performance, good in anti-collision performance, good in anti-collision performance and good in anti-collision performance. And the service life of the locking device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive braking systems, and in particular, to a braking locking device and a brake caliper assembly. Background Art

[0002] In the existing technical solutions of EMB brake calipers, the brake caliper structures all have locking mechanisms. Among them, there is a structure that uses an electromagnet as the locking power device. By the extension and retraction of the locking head of the electromagnet, the power transmission is locked and unlocked, so as to realize the locking of the entire parking system. Among them, the locking groove cooperating with the locking head of the electromagnet is integrated on the gear. Since the action of the electromagnet is instantaneous, when the electromagnet push rod performs an axial action, there will be an impact noise between the moving iron core and the static iron core of the electromagnet. At the same time, the push rod of the electromagnet will be subjected to a radial force of the locking gear during parking. When this force contacts the head of the push rod, it will generate an impact on the head of the electromagnet, resulting in a relatively large noise. Moreover, the energized coil of the electromagnet itself will generate heat, and if the heat is not transferred out in time, it will affect the relevant electrical components due to heat shock.

[0003] In the prior art, the patent with the publication number CN218598679U discloses a parking brake locking device. The electromagnet is press-fitted into the cavity of the housing through an interference fit with a circular end cover. A rubber ring is sleeved on the outer shell of the electromagnet to have a transition fit with the inner wall of the cavity to solve the radial impact, and a wave spring is also arranged axially for axial impact buffering. Under such a design, the impact of the electromagnet can be solved. However, the electromagnet can move in the cavity, so the movable space of the electromagnet forms a cavity structure, and the impact sound generated when the push rod of the electromagnet extends and retracts is amplified here, forming a relatively large noise. On the other hand, the electromagnet generates heat during operation, and the heat needs to be dissipated in time. However, this assembly gap has a certain blocking effect on the heat transfer, and there is a risk that the heat cannot be transferred and dissipated in time, resulting in the electromagnet being damaged due to heat shock. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a braking locking device and a brake caliper assembly, which can effectively reduce the radial impact while effectively reducing the impact noise, strengthen the strength and anti-impact ability of the locking components, and can also transfer the heat inside the locking components out in time, thereby extending the service life of the locking device.

[0005] To achieve the above object, the technical solution adopted by the present invention to solve its technical problems is as follows: The braking and locking device includes an MGU housing, a transmission gear mechanism provided thereon, and a locking member for locking the transmission gear mechanism for parking. An installation cavity for accommodating the locking member is provided in the MGU housing, and a shock-absorbing buffer layer is connected between the inner wall of the installation cavity and the locking member.

[0006] The locking member is in clearance fit with the inner wall of the installation cavity, and the shock-absorbing buffer layer is arranged in the fitting clearance between the locking member and the installation cavity.

[0007] The shock-absorbing buffer layer is arranged as a filling layer with sound absorption, heat transfer and damping properties.

[0008] The shock-absorbing buffer layer is formed by pouring sound insulation, shock absorption and damping glue into the gap between the locking member and the installation cavity.

[0009] The shock-absorbing buffer layer includes a shock-absorbing sleeve sleeved on the surface of the housing of the locking member, and the shock-absorbing sleeve is in interference fit with the installation cavity.

[0010] The locking member includes a locking housing and an end cover connected to one end thereof. A cavity structure is formed between the locking housing and the end cover, and a locking push rod and a driving member for driving the locking push rod to expand and contract are arranged in the cavity structure.

[0011] One or more pouring ports are arranged at the outer edge of the end cover and / or the port of the installation cavity.

[0012] The end cover is in interference press-fit with the installation cavity.

[0013] A plurality of installation lugs are arranged on the outer periphery of the end cover, and a counterbore matching with the corresponding installation lugs is arranged at the port of the installation cavity. The plurality of installation lugs are threadedly connected to the corresponding counterbores through bolts.

[0014] An annular clamping platform communicating with the counterbore is further arranged at the port of the installation cavity, and the annular clamping platform is in sealing clamping fit with the end cover to block the port of the installation cavity.

[0015] The driving member includes an electromagnetic coil installed in the locking housing, an upper static iron core, a lower static iron core sleeved on the locking push rod, and a moving iron core therebetween. The upper static iron core is installed on the end cover, and the lower static iron core is installed at the lower end of the locking housing and extends outwards.

[0016] A blind hole slidably matched with the locking push rod is arranged at the center of the lower static iron core, and the lower static iron core is spaced from the bottom of the installation cavity by a certain distance.

[0017] A damping buffer layer is arranged in the space formed between the locking component and the inner wall of the installation cavity.

[0018] A sealing ring is arranged between the outer wall surface of the locking component and the inner wall of the installation cavity, and a damping buffer layer is arranged in the space formed among the locking component, the inner wall of the installation cavity and the sealing ring.

[0019] The sealing ring is arranged between the outer wall surface of the locking housing and the inner wall of the installation cavity.

[0020] A through hole for slidably matching with the locking push rod is arranged at the center of the lower static iron core.

[0021] The sealing ring is arranged between the outer wall surface of the lower static iron core extending out of the locking housing and the inner wall of the installation cavity.

[0022] An ECU housing covering the transmission gear mechanism and the locking component is fixed on the MGU housing. A circuit board is arranged in the ECU housing, and the circuit board is connected with the locking component through a bus bar.

[0023] A brake caliper assembly includes the brake locking device described above.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention provides a brake locking device. By arranging a damping buffer layer in the gap between the installation cavity of the MGU housing and the locking component, the damping buffer layer connects the inner wall of the installation cavity and the locking component, integrates the locking component and the MGU housing together to form a soft connection, which not only improves the connection strength with the MGU housing, but also enhances the impact resistance of the locking component. While effectively reducing the radial impact, it can also effectively reduce the impact noise generated during parking lock. Moreover, the heat generated after the locking component is electrified can be transferred through the damping buffer layer, so that the heat can be dissipated in time, and the service life of the locking component is prolonged.

[0026] 2. The present invention seals the port of the installation cavity through the end cover at the upper end of the locking component, and arranges a sealing ring at the lower part of the locking component, so that a perfusion space is formed among the driving component, the inner wall of the installation cavity and the sealing ring, or a blind hole is arranged at the center of the lower static iron core at the lower end of the locking component, so that a perfusion space is formed between the driving component and the inner wall of the installation cavity. After pouring sound insulation and damping glue into the above two perfusion spaces to form a damping buffer layer, it avoids the sound insulation and damping glue from entering the inside of the locking component and ensures the service life of the locking component. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following briefly describes the content expressed in each drawing of the specification of the present invention and the marks in the drawings:

[0028] Figure 1 is a schematic structural diagram of the first embodiment of the braking locking device of the present invention;

[0029] Figure 2 is an exploded view of the braking locking device of the present invention;

[0030] Figure 3 is an assembly schematic diagram of the locking component in the present invention;

[0031] Figure 4 is a schematic structural diagram of the MGU housing in the present invention;

[0032] Figure 5 is a schematic structural diagram of the locking component in the present invention;

[0033] Figure 6 is a cross-sectional view of the assembly structure of the locking component in the second embodiment of the present invention;

[0034] Figure 7 is a cross-sectional view of the assembly structure of the locking component in the third embodiment of the present invention;

[0035] The markings in the above figures are all: 1. MGU housing, 11. Installation cavity, 12. Filling port II, 13. Counterbore, 14. Annular snap ring, 2. Transmission gear mechanism, 21. Motor gear, 22. Intermediate gear, 23. Braking output gear, 24. Locking groove, 3. Locking component, 31. Locking housing, 32. End cover, 33. Locking push rod, 34. Driving component, 341. Electromagnetic coil, 342. Upper static iron core, 343. Lower static iron core, 344. Moving iron core, 35. Push rod head, 36. Filling port I, 37. Installation ear, 4. Shock absorption and buffering layer, 5. Sealing ring, 6. ECU housing, 7. Circuit board, 8. Braking motor, 9. Axle pin. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the prior art, during parking braking, the head of the push rod in the locking component is subjected to a radial force from the locking gear in the transmission gear mechanism. When this force contacts the locking gear and the head of the push rod, it generates an impact on the head of the locking component, resulting in relatively large noise. Moreover, when the locking component is energized, the coil will heat up and generate heat. The existing installation structure cannot transfer the heat out in time, which will affect the relevant electrical components due to the heat impact.

[0040] In view of the above technical problems, the present invention provides a braking locking device, which will be specifically described in the following embodiments.

[0041] Embodiment 1

[0042] As Figures 1 to 5 shown, the present invention provides a braking locking device, which is a part of the braking actuator on the brake caliper assembly. The brake caliper assembly includes an MGU housing 1, a transmission gear mechanism 2 provided thereon, and a locking component 3 for locking the transmission gear mechanism 2 for parking. The transmission gear mechanism 2 includes a motor gear 21 connected to a braking motor 8, an intermediate gear 22, and a braking output gear 23. The intermediate gear 22 is preferably a double gear. A shaft pin 9 is fixed in the MGU housing 1, and the double gear is installed on the shaft pin 9. The motor gear 21 is connected to the braking output gear 23 through the double gear. Specifically, the large gear of the double gear meshes with the motor gear 21, and the small gear of the double gear meshes with the braking output gear 23. The braking output gear 23 is connected to the brake caliper body through a motion conversion mechanism. When the braking motor 8 operates, the power is transmitted to the motion conversion mechanism through the motor gear 21, the double gear, and the braking output gear 23 in sequence, and the brake caliper brake pads are driven to move through the motion conversion mechanism to achieve braking clamping or braking release. The large gear of the double gear is a locking gear, and a plurality of locking grooves 24 are circumferentially and spacedly arranged along the spoke of the locking gear. The push rod head 35 of the retractable locking push rod 33 on the locking component 3 corresponds to the locking grooves 24 on the double gear. The push rod head 35 expands and contracts and snaps into the corresponding locking grooves 24, which can achieve the braking clamping and locking of the vehicle brake disc.

[0043] An installation cavity 11 for accommodating a locking component 3 is provided inside an MGU housing 1. The installation cavity 11 is arranged as a cylindrical cavity. A shock-absorbing and buffering layer 4 is connected between the inner wall of the installation cavity 11 and the locking component 3, so that the locking component 3 and the MGU housing 1 are integrated together to form a flexible connection, which not only improves the connection strength with the MGU housing 1, but also enhances the impact resistance of the locking component 3. While effectively reducing the radial impact, it can also effectively reduce the impact noise generated during parking lock-up. Moreover, the heat generated after the locking component 3 is electrified can be transferred through the shock-absorbing and buffering layer 4, so that the heat can be dissipated in time, and the service life of the locking component 3 is extended.

[0044] Specifically, a clearance fit is provided between the locking component 3 and the inner wall of the installation cavity 11. A shock-absorbing and buffering layer 4 is arranged in the clearance between the locking component 3 and the installation cavity 11, and the shock-absorbing and buffering layer 4 is filled in the clearance between the locking component 3 and the installation cavity 11. The shock-absorbing and buffering layer 4 is arranged as a filling layer with sound absorption, heat transfer and damping properties, and can be formed by pouring sound insulation, shock absorption and damping glue into the clearance between the locking component 3 and the installation cavity 11. It has the functions of sound insulation, shock absorption and damping, and can effectively reduce the impact noise generated during parking lock-up. Moreover, the heat generated after the locking component 3 is electrified can be transferred through the shock-absorbing and buffering layer 4, so that the heat can be dissipated in time, and the service life of the locking component 3 is extended.

[0045] Specifically, the locking component 3 includes a locking housing 31 and an end cover 32 connected to one end thereof. The diameter of the end cover 32 is greater than the outer diameter of the locking housing 31. A cavity structure is formed between the locking housing 31 and the end cover 32. A locking push rod 33 and a driving component 34 for driving the telescopic movement of the locking push rod 33 are arranged in the cavity structure. A push rod head 35 is installed at the end of the locking push rod 33. The installation method of the locking component 3 includes the following two types: One installation method is that the outer edge of the end cover 32 is press-fitted with the installation cavity 11 with interference. In this case, one or more filling ports Ⅰ 36 can be arranged on the outer edge of the end cover 32; or one or more filling ports Ⅱ 12 can be arranged on the inner wall of the port of the installation cavity 11; or one or more filling ports Ⅰ 36 are arranged on the outer edge of the end cover 32, and one or more filling ports Ⅱ 12 are arranged on the installation cavity 11. The filling ports Ⅰ 36 and the filling ports Ⅱ 12 are arranged opposite or offset. The filling ports are communicated with the installation cavity 11 to facilitate filling sound insulation and shock absorption damping glue therein. Another installation method is that a plurality of installation lugs 37 are arranged on the outer periphery of the end cover 32, and a counterbore 13 matched with the corresponding installation lugs 37 is arranged at the port of the installation cavity 11. The plurality of installation lugs 37 are threadedly connected with the corresponding counterbore 13 through bolts, making the installation and disassembly of the locking component 3 more convenient and fast. An annular clamping platform 14 communicated with the counterbore 13 is also arranged at the port of the installation cavity 11. The annular clamping platform 14 is hermetically clamped and matched with the end cover 32 to block the port of the installation cavity 11, which not only ensures the sealing of the filling space, but also ensures the installation accuracy and stability of the locking component 3. In this case, one or more filling ports Ⅰ 36 can be arranged on the outer edge of the end cover 32; or one or more filling ports Ⅰ 36 are arranged on the outer edge of the end cover 32, and one or more filling ports Ⅱ 12 are arranged on the installation cavity 11. The filling ports Ⅰ 36 and the filling ports Ⅱ 12 are arranged opposite or offset. The above filling ports are communicated with the installation cavity 11 to facilitate filling sound insulation and shock absorption damping glue therein.

[0046] Specifically, the driving component 34 includes an electromagnetic coil 341 installed in the locking housing 31, an upper static iron core 342, a lower static iron core 343 sleeved on the locking push rod 33, and a moving iron core 344 therebetween. The upper static iron core 342 is installed on the end cover 32. The lower static iron core 343 is installed at the lower end of the locking housing 31 and extends outwards. The locking push rod 33 passes through the upper static iron core 342, the moving iron core 344 and the lower static iron core 343. The locking push rod 33 is fixedly connected with the moving iron core 344, and the locking push rod 33 is slidably matched with the upper static iron core 342 and the lower static iron core 343. When the electromagnetic coil 341 is powered on, the moving iron core 344 will drive the locking push rod 33 to slide up and down along the upper static iron core 342 and the lower static iron core 343, so that the push rod head 35 at the top of the locking push rod 33 is clamped into the locking groove 24 of the locking gear of the transmission gear mechanism 2 to realize braking and locking, or the head of the locking push rod 33 is disengaged from the locking groove 24 of the locking gear to realize braking release.

[0047] To prevent the sound insulation and shock absorption damping glue from entering the locking component 3 during the pouring process, a blind hole that slidably cooperates with the locking push rod 33 is provided at the center of the lower static iron core 343, so that the bottom end of the lower static iron core 343 is blocked, and a certain distance is provided between the bottom end of the lower static iron core 343 and the bottom of the installation cavity 11. After filling the space enclosed by the outer wall of the driving component 34 and the inner wall of the installation cavity 11 with the sound insulation and shock absorption damping glue, a shock absorption and buffer layer 4 is formed.

[0048] In addition, an ECU housing 6 that covers the transmission gear mechanism 2 and the locking component 3 is fixed on the MGU housing 1. A circuit board 7 is provided in the ECU housing 6, and the circuit board 7 is connected to the electromagnetic coil 341 in the locking component 3 through a bus bar to control the energization or de-energization of the electromagnetic coil 341.

[0049] When the vehicle is in the parked state, the driving component 34 is energized forward, the locking push rod 33 extends to drive the push rod head 35 to generate an axial displacement and maintain the extended position. The push rod head 35 is inserted into the locking groove 24 of the locking gear, preventing the locking gear from rotating in the direction of brake release. At this time, the system is in the locked state, and the vehicle realizes parking lock; when unlocking the parking, the driving component 34 is energized in the reverse direction, the locking push rod 33 retracts to drive the push rod head 35 to generate an axial displacement and maintain the contracted position. The push rod head 35 is decoupled from the locking groove 24 of the locking gear. At this time, the system can operate normally, and the vehicle realizes unlocking.

[0050] Embodiment 2

[0051] As can be seen from Embodiment 1, the locking component 3 avoids the entry of the sound insulation and shock absorption damping glue during the pouring process through its own sealing form, that is, by making the bottom end of the lower static iron core 343 sealed, and the locking push rod 33 will not extend downward. However, the manufacturing difficulty of the lower static iron core 343 with this structure is large. As Figure 6 shown, the difference from Embodiment 1 is that in order to reduce the manufacturing difficulty of the lower static iron core 343, a through hole that slidably cooperates with the locking push rod 33 is provided at the center of the lower static iron core 343.

[0052] To prevent the sound insulation and shock absorption damping glue from entering the locking component 3 during the pouring process and affecting its normal operation, a sealing ring 5 is provided between the outer wall surface of the locking component 3 and the inner wall of the installation cavity 11. The specific installation position of the sealing ring 5 is between the outer wall surface of the locking housing 31 and the inner wall of the installation cavity 11, so that a shock absorption and buffer layer 4 is formed after filling the space enclosed by the driving component 34, the inner wall of the installation cavity 11 and the sealing ring 5 with the sound insulation and shock absorption damping glue.

[0053] In order to effectively block the sound-insulating and shock-absorbing damping adhesive by the sealing ring 5 during the process of pouring the sound-insulating and shock-absorbing damping adhesive, an annular groove that is snap-fitted with the sealing ring 5 is provided on the outer wall surface of the locking housing 31. Of course, this annular groove can also be provided on the inner wall of the installation cavity 11; or annular grooves are provided on both the outer wall surface of the locking housing 31 and the inner wall of the installation cavity 11, and the two annular grooves are arranged opposite to each other to form an annular space that is snap-fitted with the sealing ring 5. The setting of the annular groove increases the contact area between the sealing ring 5 and the outer wall surface of the locking housing 31 and the inner wall of the installation cavity 11, and effective sealing can be achieved. Moreover, the cross-sectional shape of the sealing ring 5 therein is not unique, and the cross-sectional shape can be circular, rectangular or other shapes.

[0054] Embodiment III

[0055] As Figure 7 shown, the difference from Embodiment II is that the specific setting position of the sealing ring 5 is different. The specific setting position of the sealing ring 5 is: a sealing ring 5 is provided between the outer wall surface of the lower static iron core 343 extending out of the locking housing 31 and the inner wall of the installation cavity 11, which increases the volume of the sound-insulating and shock-absorbing damping adhesive, and further improves the connection strength with the MGU housing 1, the impact resistance, the vibration reduction, noise reduction and heat dissipation performance in a timely manner.

[0056] Embodiment IV

[0057] The difference from Embodiments I to III is that the shock-absorbing and buffering layer 4 can be set as a shock-absorbing sleeve sleeved on the surface of the housing of the locking component 3, and its overall structure is the same as that of the shock-absorbing and buffering layer 4 in Embodiments I to III. This shock-absorbing sleeve can be set as a soft sleeve such as a rubber sleeve. After the shock-absorbing sleeve is sleeved on the surface of the housing of the locking component 3, it is press-fitted into the installation cavity 11 in an interference fit manner, so that the shock-absorbing sleeve is in interference fit with the installation cavity 11. In addition, the sealing ring 5 in Embodiments II and III can be removed according to needs.

[0058] In summary, by providing a shock-absorbing and buffering layer in the gap between the installation cavity of the MGU housing and the locking component, the present invention connects the inner wall of the installation cavity with the locking component through the shock-absorbing and buffering layer, integrates the locking component and the MGU housing together to form a soft connection, which not only improves the connection strength with the MGU housing, but also enhances the impact resistance of the locking component. While effectively reducing the radial impact, it can also effectively reduce the impact noise generated during parking lock-up. Moreover, the heat generated after the locking component is energized can be transferred through the shock-absorbing and buffering layer, so that the heat can be dissipated in a timely manner, extending the service life of the locking component; and by pouring the sound-insulating and shock-absorbing damping adhesive into the perfusion space formed by Embodiments I to III to form a shock-absorbing and buffering layer, it avoids the sound-insulating and shock-absorbing damping adhesive from entering the inside of the locking component, ensuring the service life of the locking component.

[0059] As described above, the foregoing is only to illustrate some principles of the present invention with diagrams. This specification is not intended to limit the present invention to the specific structures and applicable scopes shown and described. Therefore, all possible corresponding modifications and equivalents that can be utilized fall within the scope of the patent applied for by the present invention.

Claims

1. A braking and locking device, comprising an MGU housing, a transmission gear mechanism disposed thereon, and a locking member for locking the transmission gear mechanism, characterized in that, An installation cavity for accommodating the locking component is arranged inside the MGU housing, and a shock-absorbing buffer layer is connected between the inner wall of the installation cavity and the locking component.

2. The braking and locking device according to claim 1, wherein: The locking component is in clearance fit with the inner wall of the installation cavity, and the shock-absorbing buffer layer is arranged in the fit clearance between the locking component and the installation cavity.

3. The braking and locking device according to claim 1, wherein: The shock-absorbing buffer layer is arranged as a filling layer with sound absorption, heat transfer and damping properties.

4. The braking and locking device according to claim 3, characterized in that: The shock-absorbing buffer layer is formed by pouring sound insulation, shock absorption and damping glue into the gap between the locking component and the installation cavity.

5. The braking and locking device according to claim 3, characterized in that: The shock-absorbing buffer layer includes a shock-absorbing sleeve sleeved on the surface of the housing of the locking component, and the shock-absorbing sleeve is in interference fit with the installation cavity.

6. The braking and locking device according to claim 1, characterized in that: The locking component includes a locking housing and an end cover connected to one end thereof. A cavity structure is formed between the locking housing and the end cover, and a locking push rod and a driving component for driving the locking push rod to extend and retract are arranged in the cavity structure.

7. The braking and locking device according to claim 6, characterized in that: One or more pouring ports are arranged at the outer edge of the end cover and / or the port of the installation cavity.

8. The braking lock device according to claim 6, characterized in that: The end cover is in interference press-fit with the installation cavity.

9. The braking and locking device according to claim 6, wherein: A plurality of installation lugs are arranged on the outer periphery of the end cover, and a counterbore matched with the corresponding installation lugs is arranged at the port of the installation cavity. The plurality of installation lugs are threadedly connected to the corresponding counterbores through bolts.

10. The braking lock device according to claim 9, wherein: An annular clamping platform communicated with the counterbore is further arranged at the port of the installation cavity, and the annular clamping platform is in sealing clamping fit with the end cover to block the port of the installation cavity.

11. The braking and locking device according to claim 6, characterized in that: The driving component includes an electromagnetic coil installed in the locking housing, an upper static iron core, a lower static iron core and a moving iron core sleeved on the locking push rod. The upper static iron core is installed on the end cover, and the lower static iron core is installed at the lower end of the locking housing and extends outwards.

12. The braking and locking device according to claim 11, characterized in that: A blind hole for sliding fit with the locking push rod is arranged at the center of the lower static iron core, and the lower static iron core is spaced from the bottom of the installation cavity by a certain distance.

13. The braking and locking device according to claim 12, characterized in that: The shock-absorbing buffer layer is arranged in the space surrounded by the locking component and the inner wall of the installation cavity.

14. The braking lock device according to claim 11, wherein: A sealing ring is arranged between the outer wall surface of the locking component and the inner wall of the installation cavity, and the shock-absorbing buffer layer is arranged in the space surrounded by the locking component, the inner wall of the installation cavity and the sealing ring.

15. The braking lock device according to claim 14, characterized in that: A through hole for sliding fit with the locking push rod is arranged at the center of the lower static iron core.

16. The braking and locking device according to claim 15, characterized in that: A sealing ring is arranged between the outer wall surface of the locking housing and the inner wall of the installation cavity.

17. The braking and locking device according to claim 15, characterized in that: A sealing ring is arranged between the outer wall surface of the lower static iron core extending out of the locking housing and the inner wall of the installation cavity.

18. The braking and locking device according to claim 14, wherein: An ECU housing covering the transmission gear mechanism and the locking component is fixed on the MGU housing. A circuit board is arranged inside the ECU housing, and the circuit board is connected to the locking component through a bus bar.

19. A brake caliper assembly, characterized in that, Including the braking and locking device according to any one of claims 1 to 18.

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