Power execution structure of electronic mechanical brake

Abstract

The utility model discloses a power actuating structure of an electronic mechanical brake, which structurally comprises a brake driving motor, an actuating gear mounted on a driving main shaft of the brake driving motor, and a ratchet and pawl locking component matched with the driving main shaft, a PCBA board is installed in the shell, an angle sensor device matched with the PCBA board is installed at the end of the main shaft, and the gear transmission mechanism is installed in the shell and comprises an idle gear installed in the middle of the shell and meshed with the execution gear and a duplicate gear installed in the other end of the shell. A planetary gear carrier is installed on one axial side of the duplicate gear, a plurality of planetary gears are installed on the planetary gear carrier around the circumference, and a gear ring is installed on the radial outer side of the planetary gear carrier. The locking return mechanism of the electronic mechanical brake can solve the problem that an existing locking return mechanism of the electronic mechanical brake is poor in durability and reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile brakes, in particular to a power execution structure of an electronic mechanical brake. Background Art

[0002] With the advancement of intelligent technology in the automotive industry, demand for the functional capabilities of intelligent driving applications is growing stronger. Drive-by-wire technology, a core technology for autonomous driving, has also entered a period of rapid development. Drive-by-wire braking, a key component of this technology, is also facing both opportunities and challenges. The majority of braking products on the market today are electro-hydraulic, not pure drive-by-wire. However, electro-hydraulic brakes have inherent drawbacks, such as heavy weight, complex structure, and the need for brake lines and regular fluid replacement. Furthermore, the vehicle's four wheels cannot be controlled independently, preventing the desired distribution of braking force. Furthermore, response speed is a concern, as the driver must apply the brake fluid by depressing the pedal, which then flows through the lines before braking occurs. This results in slow response and prolonged braking times.

[0003] Electromechanical braking systems primarily achieve braking under purely mechanical conditions. For the rapidly developing new energy vehicles, the absence of brake fluid reduces pollution, reduces vehicle weight, and enables better energy recovery. Mechanical braking system technology requires a simpler mechanical structure, lowers costs, allows for easier software control, and offers faster response times. The ability to independently control all four wheels allows for handling a variety of complex road conditions and meets stringent automotive standards and market evaluation requirements, driving the rapid development of active safety technologies.

[0004] As a braking system, an electronic mechanical brake system must perform both conventional braking and parking functions. In its mechanical structure, a motor drives a gear-like speed reduction and torque increase mechanism, which then uses a conversion mechanism to convert rotational motion into linear motion. This conversion mechanism must also be capable of handling a high number of parking cycles. However, because existing conversion mechanisms, such as ball screws and planetary roller screws, lack self-locking capabilities, a parking lock mechanism is required. Since existing self-locking solutions often utilize spring-like locking return mechanisms, durability and reliability cannot be guaranteed, an electronic mechanical brake with a power execution structure for the parking lock mechanism is required to address these issues. Furthermore, the gear transmission structure of existing electronic mechanical brakes occupies a relatively large volume, outputs limited torque, and cannot achieve high-intensity braking conditions. Utility Model Content

[0005] The utility model provides a power execution structure of an electronic mechanical brake, which can solve the problems of poor durability and reliability of the locking return mechanism of the existing electronic mechanical brake.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a power execution structure of an electronic mechanical brake, which includes a brake drive motor installed on one end side of the housing of the electronic mechanical brake, an execution gear installed on the driving main shaft of the brake drive motor, and a ratchet pawl locking assembly cooperating with the driving main shaft is further provided inside the housing, the ratchet pawl locking assembly includes a ratchet installed on one side of the axial direction of the execution gear, a pawl matching the ratchet is provided on one side of the ratchet, the pawl is driven to rotate by the locking motor on the housing so that the end of the pawl is engaged with or disengaged from the ratchet teeth on the ratchet, a PCBA board is installed inside the housing, and an angle sensor device cooperating with the PCBA board is installed on the end of the main shaft, by setting a locking structure of the ratchet and the pawl, the pawl is driven to rotate by the locking motor, and cooperates with the angle sensor device to achieve precise control of the locking structure, which is stable and reliable;

[0007] The gear transmission mechanism is installed in the housing. The gear transmission mechanism includes an idler gear installed in the middle of the housing and meshing with the execution gear, and a duplex gear installed inside the other end of the housing. The duplex gear includes a large gear and a small gear arranged coaxially. The large gear meshes with the idler gear. A planetary gear carrier is installed on one axial side of the duplex gear. A plurality of planetary gears are installed on the planetary gear carrier around the circumference. A ring gear is installed on the radial outer side of the planetary gear carrier. The planetary gears are meshed with the pinion gear and the ring gear at the same time. An output connecting groove is provided at one axial end of the planetary gear carrier. The above-mentioned gear transmission mechanism used in the execution device has a compact structure. The planetary gear carrier can protect the gears inside and on the upper side thereof, and the planetary gear carrier is directly used for power output, with relatively large torque, smooth transmission and relatively small friction.

[0008] Preferably, the planetary gear carrier includes an upper fixed plate and a lower fixed plate arranged in an upper and lower manner, and a plurality of fixed shafts for fixing the planetary gears are arranged around the circumference between the upper fixed plate and the lower fixed plate, a through hole for the pinion gear to extend into is provided in the middle of the upper fixed plate, a boss is provided on one axial side of the lower fixed plate, and the output connecting groove is provided on the end face of the boss, the upper fixed plate and the lower fixed plate can protect the planetary gears and position the duplex gears at the same time to ensure the accuracy of transmission, the boss can be used as an output shaft, and can be transmitted to the braking components of the braking system through the output connecting groove to achieve stable and rapid braking.

[0009] Preferably, a bottom bearing is provided on the outer side of the boss, and a top bearing is sleeved on the outer side of the upper end of the central shaft of the double gear, which can ensure the smooth rotation of the double gear and the planetary gear frame, reduce friction resistance, and support and fix the planetary gear frame.

[0010] Preferably, the idler gear, the executive gear and the large gear of the duplex gear are all helical gears. Helical gears have lower noise, smoother transmission and can transmit greater torque.

[0011] Preferably, the outer circumferential edge of the gear ring is provided with a plurality of limit pins which are fixedly engaged with the housing. The limit pins can be used to effectively prevent the gear ring from rotating and reduce the use of fasteners.

[0012] Preferably, a driving gear is mounted on the main shaft of the locking motor, and the driving gear is engaged with the transmission teeth on the edge of the pawl, which can keep the pawl in a locked position and prevent it from moving, and the control is precise.

[0013] Preferably, a locking bracket is installed on one side of the execution gear inside the shell, and the locking motor is installed on the locking bracket. The locking bracket can install and fix the locking motor, and at the same time, the locking bracket can leave enough space for the arrangement of the pawl and the driving gear.

[0014] Preferably, the angle sensor device includes a mounting block mounted on the end of the spindle, a magnetic pole is mounted on the end of the mounting block, a magnetic induction chip is mounted on the PCBA board at a position corresponding to the magnetic pole, and the distance between the magnetic pole and the magnetic induction chip is obtained through simulation, so that the rotation of the spindle can be controlled in real time.

[0015] Preferably, the shell includes a lower shell, an upper shell and an upper cover installed on the side of the upper shell. The upper shell and the lower shell are spliced ​​up and down, and the PCBA board is installed in the space between the upper cover and the upper shell. The PCBA board can be installed and fixed separately, and the gear transmission mechanism can effectively utilize the internal structure of the shell.

[0016] Preferably, the brake drive motor is mounted on the lower housing, and the locking motor is arranged through the upper housing, which facilitates wiring connection of the locking motor.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The structure is simple. By setting a locking structure of a ratchet and a pawl, the pawl is driven to rotate by a locking motor, and precise control of the locking structure can be achieved in conjunction with the angle sensor device. When the pawl is stuck in the ratchet, the parking locking action is completed. When the locking motor is powered off, the current parking state can be maintained, which is stable and reliable. When in the parking release state, the locking motor drives the pawl away from the ratchet, and the pawl will not vibrate from the released state to the locked state due to vibration or other conditions. The above-mentioned gear transmission mechanism used in the actuator has a compact structure, and the planetary gear frame can protect the gears inside and on the upper side thereof, and the planetary gear frame is directly used for power output, with relatively large torque, smooth transmission and relatively small friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a main cross-sectional structural diagram of the present utility model;

[0020] Figure 2 This is a three-dimensional exploded decomposition state diagram of the utility model;

[0021] Figure 3 It is a partial cross-sectional enlarged view of the utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the internal structure of the utility model;

[0023] Figure 5 This is a structural diagram of the gear transmission mechanism of the present invention in an exploded state;

[0024] Figure 6 This is a three-dimensional structural diagram of the planetary gear carrier of the utility model

[0025] Figure 7 This is a schematic diagram of the ratchet pawl locked state of the present invention;

[0026] Figure 8 This is a schematic diagram of the ratchet pawl unlocked state of the present invention;

[0027] Figure 9 It is a partial three-dimensional structural diagram of the utility model;

[0028] Figure 10 It is a partial three-dimensional structural diagram of the utility model.

[0029] Reference numerals:

[0030] 1. Brake drive motor, 11. Drive spindle, 2. Angle sensor device, 21. Magnetic pole, 22. Magnetic induction chip, 23. Mounting block, 3. Gear transmission mechanism, 31. Idle gear, 33. Duplex gear, 34. Pinion, 35. Planetary gear, 36. Planetary gear carrier, 361. Fixed shaft, 362. Lower fixed plate, 363. Boss, 364. Output connecting groove, 365. Upper fixed plate, 366. Raised table, 37. Limit pin, 38. Ring gear, 39. Bottom bearing, 4. Locking motor, 40. Top bearing, 5. Housing, 51. Lower housing, 52. Upper housing, 53. Upper cover, 12. PCBA board, 6. Actuator gear, 7. Ratchet, 8. Drive gear, 9. Locking bracket, 10. Pawl, 101. Pawl claw end, 102. Pawl gear end DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] like Figure 1-10 As shown, the utility model solves the problem of poor durability and reliability of the locking return mechanism of the existing electronic mechanical brake and provides the following technical solutions: a power execution structure of an electronic mechanical brake, which includes a brake drive motor 1, which is installed on one end side of the housing 5 of the electronic mechanical brake, and an execution gear 6 is installed on the driving spindle 11 of the brake drive motor 1. The interior of the housing 5 is also provided with a ratchet pawl locking assembly that cooperates with the driving spindle 11. The ratchet pawl locking assembly includes a ratchet 7 installed on one axial side of the execution gear 6. A pawl 10 matching the ratchet 7 is provided on one side of the ratchet 7. The pawl 10 is driven to rotate by the locking motor 4 on the housing 5, so that the end of the pawl 10 engages or disengages with the ratchet teeth on the ratchet 7. A PCBA board 12 is installed inside the housing 5, and an angle sensor device 2 matching the PCBA board 12 is installed at the end of the spindle 11. By setting a locking structure between the ratchet 7 and the pawl 10, the pawl 10 is driven to rotate by the locking motor 4, and cooperates with the angle sensor 2 device to achieve precise control of the locking structure, which is stable and reliable.

[0033] The gear transmission mechanism 3 is installed in the housing 5. The gear transmission mechanism 3 includes an idler gear 31 installed in the middle of the housing 5 and meshing with the execution gear 6, and a double gear 33 installed inside the other end of the housing 5. The double gear 33 includes a large gear and a small gear 34 arranged coaxially. The large gear meshes with the idler gear 31. A planetary gear carrier 36 is installed on one axial side of the double gear 33. A plurality of planetary gears 35 are installed on the planetary gear carrier 36 around the circumference. A ring gear 38 is installed on the radial outer side of the planetary gear carrier 36. The planetary gears 35 are meshed with the pinion 34 and the ring gear 38 at the same time. An output connecting groove 364 is provided at one axial end of the planetary gear carrier 36. The above-mentioned gear transmission mechanism 3 is compact in structure in the actuator. The planetary gear carrier 36 can protect the gears inside and on the upper side thereof, and the planetary gear carrier 36 is directly used for power output, with relatively large torque, smooth transmission and relatively small friction.

[0034] Specifically, the output connecting groove 364 can be a spline groove, which is used to connect with the linear brake assembly in the braking device, so that the braking component clamps the brake disc to achieve braking. The gear transmission mechanism 3 is flat as a whole, and the brake drive motor 1 and the output connecting groove 364 are respectively provided at both ends of the shell 5, so the gear transmission mechanism 3 can transmit the power of the brake drive motor 1 to the output connecting groove 364, leaving more space for the installation of other components on the braking device.

[0035] The idler wheel 31 plays the role of transmitting power. A rotating shaft is provided in the middle thereof, and both ends of the rotating shaft are fixed by the housing 5 .

[0036] When pawl 10 engages ratchet 7, it stops and remains locked. This also stops actuator gear 6 on drive spindle 11, and the mating gear train. Theoretically, the entire gear train could be locked. However, since only the initial gear is involved, actuator gear 6 experiences minimal torque, making it the easiest to control and requiring minimal braking force. Therefore, locking actuator gear 6 is the optimal solution.

[0037] The number of ratchet teeth of the ratchet wheel 7 is as large as possible in terms of mechanical strength, so as to control the parking stroke and improve the accuracy of controlling the parking force. The pawl 10 has two working states: the ratchet pawl parking lock state and the ratchet pawl release lock state. The corresponding pawl 10 is at two positioning points, one positioning point is the pawl 10 and the ratchet wheel 7 locked state, and the other positioning point is the pawl 10 away from the ratchet wheel 7, and the pawl limit end on the housing 2 acts as a limit; the angle of the two pawl 10 states is 30°, and the angle size is set according to two aspects. One is to ensure that the basis is completely away from each other, such as the pawl 10 will not return to the locked state when vibrating, and the other is that the distance between the pawl 10 and the ratchet wheel 7 is moderate, and the action time is moderate. If the travel of the pawl 10 from the locking end to the release end is too far, the parking action time will be too long. The number of teeth on the pawl gear end 102 of the pawl 10 can be designed based on the starting and ending states of the two positioning points of the pawl. The invalid gear features that have no meshing requirements outside the stroke can be removed, reducing material consumption and processing costs.

[0038] The pawl end 101 of the pawl 10 engages the ratchet teeth of the ratchet wheel 7 to lock and release the vehicle. Due to the high number of parking cycles required, wear on the ratchet wheel 7 and the pawl 10 may occur. Therefore, a hard coating may be applied to the contact surface of the pawl 10 with the ratchet wheel 7 to increase wear resistance.

[0039] In addition, in this embodiment, the mechanical parts are protected by software logic control. As the pawl 10 moves further away, the contact area between the pawl 10 and the ratchet 7 becomes smaller and smaller, the stress becomes more and more concentrated, and the pawl 10 and the ratchet 7 become more and more susceptible to damage. In particular, when the parking endurance is high, the damage is greater. Therefore, on the basis of selecting high-strength mechanical performance materials as much as possible, the ratchet 7 and the pawl 10 are protected from damage through software control logic. After receiving the parking brake release signal, the brake drive motor 1 is first reversed. After the reversal, there is no torque between the pawl 10 and the ratchet 7. At this time, the locking motor 5 rotates, driving the drive gear 8 to engage with the ratchet gear end 102, driving the ratchet claw end 101 away from the ratchet 7 from the locked state to the released state of the ratchet limit end. The ratchet 10 can then be easily released from parking, and the ratchet 7 and the pawl 10 are not mechanically damaged, thereby ensuring safety characteristics.

[0040] In this embodiment, if Figure 6 As shown, the planetary gear carrier 36 includes an upper fixed plate 365 and a lower fixed plate 362 arranged in an upper and lower manner. A plurality of fixed shafts 361 for the planetary gears 35 to be fixed are arranged around the circumference between the upper fixed plate 365 and the lower fixed plate 362. A through hole for the pinion 34 to extend into is provided in the middle of the upper fixed plate 365. A boss 363 is provided on one axial side of the lower fixed plate 362. The output connecting groove 364 is provided on the end surface of the boss 363. The upper fixed plate 365 and the lower fixed plate 362 are connected to each other. 362 can protect the planetary gear 35 and position the double gear 33 at the same time to ensure the accuracy of transmission. The boss 363 can be used as an output shaft and can be transmitted to the braking components of the braking system through the output connecting groove 364 to achieve stable and rapid braking. The upper fixed plate 365 and the lower fixed plate 362 at both ends of the fixed shaft 361 are both provided with raised surfaces 366. The two ends of the planetary gear 35 are provided with convex surfaces in contact with the raised surfaces 366, which can reduce the friction when the planetary gear 35 rotates.

[0041] The planetary gears 35 have no fewer than three components, and the pinion 34 functions as a sun gear, orbiting around the ring gear 38 while the planetary gears 35 rotate. The output end of the planetary carrier 36 is an output connection slot 364 on the boss 363, featuring an internal spline design that meshes with the external splines of the linear motion conversion mechanism, outputting the torque generated by the gear transmission mechanism. The idler gear 31, the actuator gear 6, and the large gear of the duplex gear 33 are all helical gears, which offer lower noise, smoother transmission, and greater torque transmission.

[0042] Among them, Figure 1As shown, a bottom bearing 39 is provided on the outer side of the boss 363, and a top bearing 40 is sleeved on the outer side of the upper end of the central axis of the double gear 33, which can ensure the smoothness of the rotation of the double gear 33 and the planetary gear carrier 36, reduce friction resistance, and also support and fix the planetary gear carrier 36.

[0043] Among them, the outer circumferential edge of the gear ring 38 is provided with multiple limit pins 37 that are clamped and fixed with the housing 5. The limit pins 37 can effectively prevent the gear ring 38 from rotating and reduce the use of fasteners.

[0044] like Figure 7-9 As shown, a driving gear 8 is installed on the main shaft of the locking motor 4, and the driving gear 8 is engaged with the transmission teeth on the edge of the pawl 10, which can keep the pawl 10 in a locked position and prevent it from moving, and the control is precise.

[0045] like Figure 1-2 As shown, a locking bracket 9 is installed on one side of the execution gear 6 inside the housing 5, and the locking motor 4 is installed on the locking bracket 9. The locking bracket 9 can install and fix the locking motor 4, and at the same time, the locking bracket 9 can leave enough space for the setting of the pawl 10 and the driving gear 6.

[0046] As a specific implementation of the angle sensor device 2, Figure 1-3 As shown, the angle sensor device 2 includes a mounting block 23 mounted on the end of the spindle 11, a magnetic pole 21 is mounted on the end of the mounting block 23, and a magnetic induction chip 22 is mounted at a position corresponding to the magnetic pole 21 on the PCBA board 12. The distance between the magnetic pole 21 and the magnetic induction chip 22 is obtained through simulation, and the rotation of the spindle 11 can be controlled in real time.

[0047] like Figure 1-2 As shown, the housing 5 comprises a lower housing 51, an upper housing 52, and an upper cover 53 mounted on the side of the upper housing 52. The upper housing 52 and lower housing 51 are joined vertically, and the PCBA board 12 is mounted in the space between the upper cover 53 and the upper housing 52. This allows for separate installation and fixation of the PCBA board 12, and the gear transmission mechanism effectively utilizes the internal structure of the housing 5. The brake drive motor 1 is mounted on the lower housing 51, and the locking motor 4 is disposed through the upper housing 52, facilitating wiring connections for the locking motor 4.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0051] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A power execution structure of an electromechanical brake, characterized in that: Its structure includes: A brake drive motor (1) is mounted on one side of a housing (5) of an electronic mechanical brake. An executive gear (6) is mounted on a driving spindle (11) of the brake drive motor (1). A ratchet pawl locking assembly cooperating with the driving spindle (11) is further provided inside the housing (5). The ratchet pawl locking assembly comprises a ratchet (7) mounted on one axial side of the executive gear (6). A pawl (10) matching the ratchet (7) is provided on one side of the ratchet (7). The pawl (10) is driven to rotate by a locking motor (4) on the housing (5) so that the end of the pawl (10) engages or disengages with the ratchet teeth on the ratchet (7). A PCBA board (12) is mounted inside the housing (5). An angle sensor device (2) cooperating with the PCBA board (12) is mounted on the end of the spindle (11). A gear transmission mechanism (3) is installed in a housing (5). The gear transmission mechanism (3) includes an idler gear (31) installed in the middle of the housing (5) and meshing with the execution gear (6), and a double gear (33) installed inside the other end of the housing (5). The double gear (33) includes a large gear and a small gear (34) arranged coaxially. The large gear meshes with the idler gear (31). A planetary gear carrier (36) is installed on one axial side of the double gear (33). A plurality of planetary gears (35) are installed around the circumference of the planetary gear carrier (36). A ring gear (38) is installed on the radial outer side of the planetary gear carrier (36). The planetary gears (35) mesh with the small gear (34) and the ring gear (38) at the same time. An output connecting groove (364) is provided on one axial end of the planetary gear carrier (36).

2. The power execution structure of the electromechanical brake according to claim 1, characterized in that: The planetary gear carrier (36) includes an upper fixed plate (365) and a lower fixed plate (362) arranged in an upper and lower manner. A plurality of fixed shafts (361) for the planetary gears (35) to be sleeved and fixed are arranged around the circumference between the upper fixed plate (365) and the lower fixed plate (362). A through hole for the pinion (34) to extend into is provided in the middle of the upper fixed plate (365). A boss (363) is provided on one axial side of the lower fixed plate (362). The output connecting groove (364) is provided on the end face of the boss (363).

3. The power execution structure of the electromechanical brake according to claim 2, characterized in that: A bottom bearing (39) is provided on the outer side of the boss (363), and a top bearing (40) is sleeved on the outer side of the upper end of the central axis of the double gear (33).

4. The power execution structure of the electromechanical brake according to claim 2, characterized in that: The idler gear (31), the executive gear (6) and the large gear of the double gear (33) are all helical gears.

5. The power execution structure of the electromechanical brake according to claim 2, characterized in that: The outer circumferential edge of the gear ring (38) is provided with a plurality of limiting pins (37) which are clamped and fixed with the housing (5).

6. The power execution structure of the electromechanical brake according to claim 1, characterized in that: A driving gear (8) is mounted on the main shaft of the locking motor (4), and the driving gear (8) is meshed with the transmission teeth on the edge of the ratchet (10).

7. The power execution structure of the electromechanical brake according to claim 1, characterized in that: A locking bracket (9) is installed inside the housing (5) on one side of the execution gear (6), and the locking motor (4) is installed on the locking bracket (9).

8. The power execution structure of the electromechanical brake according to claim 1, characterized in that: The angle sensor device (2) comprises a mounting block (23) mounted on the end of a main shaft (11), a magnetic pole (21) being mounted on the end of the mounting block (23), and a magnetic induction chip (22) being mounted on a position on the PCBA board (12) corresponding to the magnetic pole (21).

9. The power execution structure of the electromechanical brake according to claim 1, characterized in that: The housing (5) comprises a lower housing (51), an upper housing (52) and an upper cover (53) installed on the side of the upper housing (52); the upper housing (52) and the lower housing (51) are spliced ​​together, and the PCBA board (12) is installed in the space between the upper cover (53) and the upper housing (52).

10. The power execution structure of the electromechanical brake according to claim 9, characterized in that: The brake drive motor (1) is mounted on the lower housing (51), and the locking motor (4) is disposed through the upper housing (52).

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