Brake actuator assembly, brake system and vehicle

Abstract

The utility model provides a brake actuator assembly, a brake system and a vehicle, and belongs to the technical field of brakes. The brake actuator assembly comprises an actuator shell and a driving motor; an accommodating channel and a first mounting hole communicated with the accommodating channel are formed in the actuator shell, one end of the first mounting hole penetrates through the actuator shell, and the first mounting hole is perpendicular to the accommodating channel; the outer side wall of the driving motor is connected with the actuator shell; the power output end of the driving motor extends into the first mounting hole; a needle bearing is arranged at the power output end; a mounting counter bore is formed in the through end of the first mounting hole, and the radial size of the mounting counter bore is larger than that of the first mounting hole; the needle bearing is arranged in the mounting counter bore, and the outer ring of the needle bearing abuts against the hole wall of the mounting counter bore. The brake system comprises a brake actuator assembly; a vehicle includes a braking system. According to the brake actuator assembly, the brake system and the vehicle, the torque output efficiency can be improved, and radial run-out of the power output end of the driving motor is reduced.

Description

Technical Field

[0001] This application belongs to the field of vehicle technology, and more specifically, relates to a brake actuator assembly, a braking system, and a vehicle. Background Technology

[0002] Drum brakes, also known as block brakes, have brake blocks (brake shoes) located inside the brake drum. When braking, the brake blocks open outwards, rubbing against the inside of the brake drum to achieve braking. The brake actuator typically includes a main brake housing, a gear transmission assembly and piston assembly housed within the main housing, and a power source assembly connected to the input end of the gear transmission assembly. The power source assembly drives the piston assembly to move axially through the gear transmission assembly, thereby pressing against the brake shoes to achieve braking.

[0003] In related technologies, the connection structure between the main housing of the brake actuator and the output end of the power source assembly cannot effectively constrain the output shaft of the power source assembly. This results in a large axial force on the power output end when the power source assembly outputs torque, affecting the torque output efficiency, and the radial runout generated by the power output end during operation is also large. Utility Model Content

[0004] The purpose of this application is to provide a brake actuator assembly, a braking system, and a vehicle, aiming to solve the technical problem in the related art where the connection structure between the main housing of the brake actuator and the output end of the power source assembly is unreasonable, resulting in large radial runout and low torque output efficiency at the power output end.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, a brake actuator assembly is provided, comprising:

[0007] The actuator housing has an internal receiving channel extending in a first direction and a first mounting hole communicating with the receiving channel. The first mounting hole is perpendicular to the receiving channel and has one end penetrating the actuator housing.

[0008] The drive motor has its outer side wall connected to the actuator housing; the power output end of the drive motor extends into the first mounting hole; a needle roller bearing is provided on the power output end.

[0009] The first mounting hole has a countersunk hole at its through end, and the radial dimension of the countersunk hole is larger than that of the first mounting hole. The needle roller bearing is disposed in the countersunk hole, and the outer ring of the needle roller bearing abuts against the wall of the countersunk hole.

[0010] Compared with related technologies, the solution shown in this application reduces the axial force when the drive motor outputs torque by setting a needle roller bearing at the power output end of the drive motor, thereby improving the torque output efficiency. A countersunk hole is provided at the end of the first mounting hole to install the needle roller bearing. The outer ring of the needle roller bearing abuts against the wall of the countersunk hole, thus radially and axially limiting the needle roller bearing and reducing radial runout of the drive motor's power output end during operation. By limiting the needle roller bearing, this application effectively constrains the power output end of the drive motor, improving the problem of unreasonable connection structure between the actuator housing and the drive motor, reducing instability factors at the drive motor's power output end during operation, and ensuring that the axial force at the power output end is not excessive when the drive motor outputs torque, thereby improving the torque output efficiency.

[0011] In conjunction with the first aspect, in one possible implementation, the first mounting hole includes a first hole segment and a second hole segment respectively disposed on both radial sides of the receiving channel, the first hole segment connecting the mounting countersunk hole and the receiving channel, and the second hole segment being disposed on the side of the receiving channel away from the mounting countersunk hole;

[0012] The power output end is connected to a first connecting shaft, and the first connecting shaft is provided with a drive gear.

[0013] The first connecting shaft is rotatably connected at both ends to the first hole section and the second hole section, and the drive gear is placed in the receiving channel.

[0014] In this application, the first mounting hole is divided into a first hole segment and a second hole segment, so that the two ends of the first connecting shaft are respectively inserted into the corresponding first hole segment and second hole segment, thereby achieving effective support for the first connecting shaft and smooth transmission of torque.

[0015] In some embodiments, a first stepped hole is provided between the first hole segment and the mounting countersunk hole, and the diameter of the first stepped hole decreases from the mounting countersunk hole toward the first hole segment;

[0016] A first limiting cylinder is sleeved on the outer peripheral wall of the first connecting shaft near the drive motor end, and the first limiting cylinder has a stepped structure.

[0017] The first limiting cylinder is disposed in the first stepped hole along with the first connecting shaft, and the outer peripheral wall of the first limiting cylinder abuts against the hole wall of the first stepped hole.

[0018] By setting the first limiting cylinder and the first stepped hole, the power output end of the drive motor is further limited to avoid axial and radial displacement during transmission, thus ensuring smooth power transmission.

[0019] For example, a second limiting cylinder is sleeved on the outer peripheral wall of the end of the first connecting shaft away from the drive motor, and the second limiting cylinder has a stepped structure;

[0020] One end of the second limiting cylinder extends into the second hole section along with the first connecting shaft, and the outer peripheral wall of the second limiting cylinder abuts against the inner wall of the second hole section; the stepped surface of the second limiting cylinder abuts against the inner wall of the receiving channel.

[0021] By further setting a second limiting cylinder, the second limiting cylinder corresponds to the first limiting cylinder at both ends of the first connecting shaft, thereby enabling the two ends of the first connecting shaft to achieve effective limiting synchronously and improving the stability of the transmission.

[0022] In conjunction with the first aspect, in one possible implementation, the receiving channel extends through the actuator housing at one end near the drive motor, and the through end of the receiving channel is covered with a sealing plate;

[0023] The actuator housing has a docking platform on the side facing the sealing plate. The docking platform protrudes away from the receiving channel, and the side wall of the docking platform abuts against the outer wall of the drive motor housing.

[0024] By setting a sealing plate, the cavity can be effectively sealed; by setting a docking platform, the drive motor and the actuator housing can be easily connected and fixed, improving the stability of the connection.

[0025] In conjunction with the first aspect, in one possible implementation, the receiving channel has a sliding channel at the end away from the drive motor; the sliding channel is parallel to the first mounting hole, and both ends of the sliding channel penetrate the actuator housing;

[0026] The sliding channel is used to install the piston assembly, and the receiving channel is used to install the gear transmission assembly; the power output end of the drive motor is poweredly connected to the input end of the gear transmission assembly, and the input end of the piston assembly is poweredly connected to the output end of the gear transmission assembly.

[0027] By setting up sliding channels to accommodate piston assemblies, and by using sliding channels, receiving channels, and the first mounting hole, a reasonable layout of the actuator housing is achieved, making full use of the internal space of the actuator housing.

[0028] In some embodiments, the two inner sidewalls of the receiving channel that are arranged opposite each other along the axial direction of the sliding channel are defined as the first sidewalls;

[0029] Each of the first side surfaces is recessed outward from the receiving channel to form a notch, the notch extending along the first direction to communicate with the sliding channel, and a first stepped surface is formed at the extended end of the notch;

[0030] The piston rod of the piston assembly is provided with a pump gear, and the two flanges of the pump gear along the axial direction of the sliding channel extend into the adjacent notches, and the bottom of the flanges of the pump gear is limited above the first step surface.

[0031] For example, the actuator housing is further provided with a second mounting hole communicating with the receiving channel. The second mounting hole is located between the first mounting hole and the sliding channel and is parallel to the first mounting hole. One end of the second mounting hole passes through the actuator housing, and the through direction of the second mounting hole is opposite to the through direction of the first mounting hole.

[0032] The second mounting hole is used to mount the intermediate drive shaft of the gear transmission assembly.

[0033] By providing a second mounting hole to mount the intermediate drive shaft, the support stability of the gear transmission assembly is enhanced.

[0034] Secondly, this application also provides a braking system, including the aforementioned brake actuator assembly.

[0035] The braking system provided in this application, since it includes the aforementioned brake actuator assembly, has all the beneficial effects of the aforementioned brake actuator assembly, and can effectively constrain the power output end of the drive motor, thereby improving torque output efficiency and reducing radial runout of the power output end of the drive motor.

[0036] Thirdly, this application also provides a vehicle including the aforementioned braking system.

[0037] The vehicle provided in this application, having the aforementioned braking system, possesses all the beneficial effects of such a braking system. By configuring the actuator housing and the drive motor connection structure, effective constraint can be achieved on the power output end of the drive motor, thereby improving torque output efficiency and enhancing structural stability. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1A cross-sectional structural schematic diagram of the brake actuator assembly provided in an embodiment of this application;

[0040] Figure 2 This is a structural schematic diagram of a cross-section of the brake actuator housing provided in an embodiment of this application;

[0041] Figure 3 For the appendix Figure 1 Enlarged structural diagram at point B;

[0042] Figure 4 A three-dimensional structural diagram of the brake actuator housing provided in the embodiments of this application. Figure 1 ;

[0043] Figure 5 A three-dimensional structural diagram of the brake actuator housing provided in the embodiments of this application. Figure 2 ;

[0044] Figure 6 This is a schematic diagram of the installation structure of the brake actuator assembly provided in an embodiment of this application.

[0045] In the diagram: 1. Actuator housing; 11. Receiving channel; 111. Groove; 112. First stepped surface; 113. Recess; 12. First mounting hole; 121. First hole section; 122. Second hole section; 13. Mounting countersunk hole; 14. First stepped hole; 15. Docking platform; 16. Sliding channel; 17. Second mounting hole; 18. Fixing platform; 2. Drive motor; 21. Needle roller bearing; 22. First connecting shaft; 3. First limiting cylinder; 4. Second limiting cylinder; 5. Sealing plate; 6. Piston assembly; 7. Gear transmission group; 71. Intermediate transmission shaft; 72. Drive gear; 73. Intermediate gear; 74. Sub-pump gear; 8. Brake base plate. Detailed Implementation

[0046] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0047] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on that other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] The terms "first" and "second" are used 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a number" means two or more, unless otherwise explicitly specified.

[0049] It should be noted that the orientation or positional relationship indicated by "front", "rear", "inner", "outer", "upper", and "lower" in this embodiment is based on the orientation of the actuator housing 1 shown in the accompanying drawings. In addition, the first direction defined in the embodiments of this application refers to the axial direction of the receiving channel 11. For ease of explanation, the direction indicated by arrow A is used in this application to indicate the first direction.

[0050] It should be noted that in the relevant technologies, the power output shaft of the power source component is often directly installed inside the actuator housing 1. However, the radial and axial constraint forces of the actuator housing 1 on its power output shaft are insufficient, resulting in a certain axial force and radial runout at its power output end when the power source component outputs torque, which affects the torque output efficiency and the stability of power transmission.

[0051] Please refer to the following: Figures 1 to 6 The brake actuator assembly, braking system, and vehicle provided in this application will now be described. The brake actuator assembly includes an actuator housing 1 and a drive motor 2. The actuator housing 1 has a receiving channel 11 extending in a first direction and a first mounting hole 12 communicating with the receiving channel 11. The first mounting hole 12 is perpendicular to the receiving channel 11 and has one end penetrating through the actuator housing 1. The outer wall of the drive motor 2 is connected to the actuator housing 1. The power output end of the drive motor 2 extends into the first mounting hole 12. A needle roller bearing 21 is provided on the power output end. The penetrating end of the first mounting hole 12 has a mounting countersunk hole 13, the radial dimension of which is larger than the radial dimension of the first mounting hole 12. The needle roller bearing 21 is disposed in the mounting countersunk hole 13, and the outer ring of the needle roller bearing 21 abuts against the hole wall of the mounting countersunk hole 13.

[0052] It should be noted that the actuator housing 1 also includes a piston assembly 6 and a gear transmission group 7. The piston assembly 6 includes a piston rod and two pistons threadedly connected to the piston rod. The piston moves axially along the piston rod in two ways, and the principles of movement and braking are related technologies. Specifically, on the one hand, the power output end of the drive motor 2 is connected to the power input end of the gear transmission group 7, and the power input end of the gear transmission group 7 is connected to the pump gear 74 on the piston rod. When the drive motor 2 outputs torque, the power of the drive motor 2 is transmitted to the piston rod through the gear transmission group 7 and the pump gear 74, causing the piston rod to rotate. When the piston rod rotates, the piston located on the piston rod rotates on the piston rod and moves axially along the piston rod to press against the brake shoes for braking.

[0053] On the other hand, the piston rod of the piston assembly 6 can drive the pistons at both ends to move along the axial direction perpendicular to the receiving channel 11, and the movement of the piston assembly 6 is driven by brake fluid; specifically, the actuator housing 1 is also provided with an oil inlet and an oil outlet so as to introduce brake fluid into the receiving channel 11. Under the action of the brake fluid, the piston rod and the piston can move along the axial direction of the piston rod to press against the brake shoes for braking.

[0054] It should be understood that the needle roller bearing 21 is mounted on the power output shaft of the drive motor 2, and its radial dimension is larger than that of the power output shaft of the drive motor 2. Therefore, in order to ensure the rationality of the installation, the radial dimension of the mounting countersunk hole 13 is larger than that of the first mounting hole 12. In this way, a stepped surface is formed between the ends of the mounting countersunk hole 13 and the first mounting hole 12. This stepped surface can axially limit the rolling bearing, thereby improving the stability of the power transmission at the power output end of the drive motor 2.

[0055] The needle roller bearing 21 provided in this application is used to eliminate the axial force at the power output end of the drive motor 2 to ensure the torque transmission efficiency; and a mounting countersunk hole 13 is provided on the actuator housing 1, which is directly connected to the needle roller bearing 21. The needle roller bearing 21 can effectively constrain the power output end of the drive motor 2. Compared with the unreasonable connection structure between the main housing and the power source component output end in related technologies, it can avoid large radial runout at the power output end.

[0056] In addition, by effectively constraining the power output end of the drive motor 2, the instability factors of the power output end during operation are reduced, so that when the drive motor 2 outputs torque, the axial force on the power output end will not be too large, thereby improving the torque output efficiency and solving the technical problem of low torque output efficiency caused by connection structure problems in related technologies.

[0057] Specifically, the actuator housing 1 has a plurality of threaded connection holes on the side facing the drive motor 2. The plurality of threaded connection holes are axially spaced around the receiving channel 11, and the drive motor 2 is connected to the actuator housing 1 through the aforementioned threaded connection holes.

[0058] Compared with related technologies, the brake actuator assembly provided in this application reduces the axial force when the drive motor 2 outputs torque by setting a needle roller bearing 21 at the power output end of the drive motor 2, thereby improving the torque output efficiency. Furthermore, by providing a countersunk hole 13 at the end of the first mounting hole 12 to mount the needle roller bearing 21, and by having the outer ring of the needle roller bearing 21 abut against the wall of the countersunk hole 13, the needle roller bearing 21 is radially and axially limited, reducing the radial runout phenomenon of the power output end of the drive motor 2 during operation. In this application, the limitation of the needle roller bearing 21 effectively constrains the power output end of the drive motor 2, improving the problem of unreasonable connection structure between the actuator housing 1 and the drive motor 2, reducing instability factors at the power output end of the drive motor 2 during operation, and ensuring that the axial force at the power output end is not excessive when the drive motor 2 outputs torque, thus improving the torque output efficiency.

[0059] Please see Figure 2 In some possible embodiments, the first mounting hole 12 includes a first hole section 121 and a second hole section 122 respectively disposed on the radial sides of the receiving channel 11. The first hole section 121 connects the mounting countersunk hole 13 and the receiving channel 11, and the second hole section 122 is disposed on the side of the receiving channel 11 away from the mounting countersunk hole 13. The power output end of the drive motor 2 is connected to a first connecting shaft 22, and a drive gear 72 is provided on the first connecting shaft 22. The two ends of the first connecting shaft 22 are rotatably connected to the first hole section 121 and the second hole section 122 respectively, and the drive gear 72 is placed in the receiving channel 11.

[0060] In this application, the first mounting hole 12 is divided into a first hole segment 121 and a second hole segment 122, so that the two ends of the first connecting shaft 22 are respectively inserted into the corresponding first hole segment 121 and second hole segment 122. On the one hand, the first connecting shaft 22 can be effectively connected, making the connection between the drive motor 2 and the gear transmission group 7 more reasonable, realizing the smooth transmission of torque, and ensuring the transmission efficiency of the brake actuator assembly.

[0061] On the other hand, the arrangement of the components within the actuator housing 1 is more orderly. The first connecting shaft 22 rotates within the first hole section 121 and the second hole section 122, providing stable support for the transmission of the drive gear 72. This helps to enhance the stability of the entire brake actuator assembly structure and reduce the risk of failure that may arise due to unreasonable component layout.

[0062] Please see Figure 2 and Figure 3 In some embodiments, a first stepped hole 14 is provided between the first hole segment 121 and the mounting countersunk hole 13, and the diameter of the first stepped hole 14 decreases from the mounting countersunk hole 13 toward the first hole segment 121; a first limiting cylinder 3 is sleeved on the outer peripheral wall of the first connecting shaft 22 near the drive motor 2, and the first limiting cylinder 3 has a stepped structure; wherein, the first limiting cylinder 3 is disposed in the first stepped hole 14 along with the first connecting shaft 22, and the outer peripheral wall of the first limiting cylinder 3 abuts against the hole wall of the first stepped hole 14.

[0063] By setting the first limiting cylinder 3 and the first stepped hole 14, the power output end of the drive motor 2 is further limited to avoid axial and radial displacement during transmission, so as to ensure smooth power transmission.

[0064] It should be understood that the outer peripheral wall of the first limiting cylinder 3 abuts against the hole wall of the first stepped hole 14. This setting can accurately position and limit the first connecting shaft 22, ensure the accurate position of the power output end of the drive motor 2, avoid axial or radial offset during operation, and further improve the accuracy and stability of power transmission.

[0065] Furthermore, the tight contact between the first limiting cylinder 3 and the wall of the first stepped hole 14 increases the stability of the connection, effectively prevents the first connecting shaft 22 from loosening during operation, ensures the normal operation of the brake actuator assembly, and reduces potential safety hazards caused by loose components.

[0066] Please see Figure 2 and Figure 3 For example, a second limiting cylinder 4 is sleeved on the outer peripheral wall of the end of the first connecting shaft 22 away from the drive motor 2. The second limiting cylinder 4 has a stepped structure. One end of the second limiting cylinder 4 extends into the second hole section 122 along with the first connecting shaft 22, and the outer peripheral wall of the second limiting cylinder 4 abuts against the inner wall of the second hole section 122. The stepped surface of the second limiting cylinder 4 abuts against the inner wall of the receiving channel 11.

[0067] By further setting the second limiting cylinder 4 so that the second limiting cylinder 4 corresponds to the first limiting cylinder 3 at both ends of the first connecting shaft 22, the two ends of the first connecting shaft 22 can be effectively limited synchronously, which provides all-round limiting protection for the first connecting shaft 22 and can improve the stability of transmission.

[0068] One end of the second limiting cylinder 4 extends into the second hole section 122 and its outer peripheral wall abuts against the hole wall. The stepped surface abuts against the inner wall of the receiving channel 11, further stabilizing the position of the first connecting shaft 22 from the end away from the drive motor 2. This makes the entire power transmission component more reliable during operation and reduces power transmission errors caused by unstable connection.

[0069] By setting the first limiting cylinder 3 and the second limiting cylinder 4, the two ends of the first connecting shaft 22 can be effectively limited, ensuring the transmission stability of the drive gear 72 within the receiving channel 11. This allows the power of the drive motor 2 to be transmitted to the gear transmission group 7 more accurately and efficiently, optimizing the power transmission path and improving the overall performance of the brake actuator assembly.

[0070] It should be understood that in this application, the radial limitation of the first connecting shaft 22 is achieved by the contact limitation between the outer peripheral wall and the hole wall, and the axial limitation of both ends is specifically achieved by the limitation of its stepped structure, thereby realizing the effective limitation of both ends of the first connecting shaft 22.

[0071] Please see Figure 5 and Figure 6 In some possible embodiments, the receiving channel 11 passes through the actuator housing 1 at one end near the drive motor 2, and the end of the receiving channel 11 is covered with a sealing plate 5; the actuator housing 1 is provided with a docking platform 15 on the side facing the sealing plate 5, the docking platform 15 protrudes away from the receiving channel 11, and the side wall of the docking platform 15 abuts against the outer wall of the drive motor 2 housing.

[0072] By setting the sealing plate 5, the cavity can be effectively sealed; by setting the docking platform 15, the drive motor 2 and the actuator housing 1 can be easily connected and fixed, improving the stability of the connection.

[0073] Specifically, the sealing plate 5 covers the through end of the receiving channel 11, which serves to seal the receiving channel 11 and prevent leakage of brake fluid, etc.; preferably, a seal is provided at the connection between the sealing plate 5 and the actuator housing 1.

[0074] The docking platform 15 protrudes away from the receiving channel 11, and its side wall abuts against the outer wall of the drive motor 2 housing. This enhances the connection stability between the drive motor 2 and the actuator housing 1, ensures the sealing and integrity of the entire brake actuator assembly structure, and reduces possible failures due to poor sealing or unstable connection.

[0075] In addition, the structural design of the sealing plate 5 and the docking platform 15 makes it easier to install the drive motor 2 and the actuator housing 1. At the same time, when maintenance or repair is required, it is easier to disassemble and install related components, which improves the maintainability of the brake actuator assembly and reduces maintenance costs and difficulty.

[0076] Optionally, a downwardly recessed groove 113 is provided at the through end of the receiving channel 11, and the axis of the groove 113 coincides with the axis of the receiving channel 11. The cross-sectional dimension of the groove 113 is larger than the cross-sectional dimension of the receiving channel 11. The inner wall surface of the groove 113 is used as the sealing surface of the through end of the receiving channel 11 to seal the through end of the receiving channel 11.

[0077] For example, the actuator housing 1 is provided with a plurality of fixed platforms 18 spaced apart around the axis of the receiving channel 11. The fixed platforms 18 are located between the second mounting hole 17 and the sliding channel 16. The actuator housing 1 is connected to the brake base plate 8 through the fixed platforms 18.

[0078] Please see Figure 1 and Figure 2 In some possible embodiments, a sliding channel 16 is provided at the end of the receiving channel 11 away from the drive motor 2; the sliding channel 16 is parallel to the first mounting hole 12, and both ends of the sliding channel 16 penetrate the actuator housing 1; the sliding channel 16 is used to install the piston assembly 6, and the receiving channel 11 is used to install the gear transmission group 7; the power output end of the drive motor 2 is poweredly connected to the input end of the gear transmission group 7, and the input end of the piston assembly 6 is poweredly connected to the output end of the gear transmission group 7.

[0079] By setting up the sliding channel 16, the piston assembly 6 can be installed accordingly. The sliding channel 16, the receiving channel 11 and the first mounting hole 12 are set up to achieve a reasonable layout inside the actuator housing 1 and make full use of the internal space of the actuator housing 1.

[0080] A piston assembly 6 is installed in the sliding channel 16, a gear transmission group 7 is installed in the receiving channel 11, a first connecting shaft 22 is provided in the first mounting hole 12, and a needle roller bearing 21 is provided in the mounting countersunk hole 13. In this application, the targeted design of the sliding channel 16, the receiving channel 11, the first mounting hole 12, and the mounting countersunk hole 13 is used to achieve reasonable partitioning of different functions, so that the layout of each functional component of the brake actuator assembly is clear and it is easy to realize different working functions. That is, the drive motor 2 transmits power to the piston assembly 6 through the gear transmission group 7, thereby realizing the braking function.

[0081] The actuator housing 1 of this application is provided with a sliding channel 16, a receiving channel 11, a first mounting hole 12, a mounting countersunk hole 13, and a second mounting hole 17. This achieves reasonable functional zoning, avoids mutual interference between components, ensures smooth and efficient power transmission, and enables the brake actuator assembly to respond to braking commands quickly and accurately, thereby improving the working efficiency of the braking system and meeting the actual needs of vehicle braking.

[0082] It should be noted that this application indicates that the power output end of the drive motor 2 is connected to the input end of the gear transmission group 7. The specific connection method is as follows: the power output end of the drive motor 2 is connected to the intermediate gear 73 of the gear transmission group 7 through the first connecting shaft 22 and the drive gear 72 provided on the first connecting shaft 22. That is, the power output end of the drive motor 2 drives the first connecting shaft 22 to rotate, so that the first connecting shaft 22 drives the drive gear 72 to rotate, and then the drive gear 72 meshes with the intermediate gear 73 to realize power transmission.

[0083] Please see Figure 2 and Figure 4 In some embodiments, the two inner sidewalls of the receiving channel 11 that are arranged opposite each other along the axial direction of the sliding channel 16 are defined as the first sidewalls;

[0084] Each first side is recessed outward from the receiving channel 11 and forms a notch 111. The notch 111 extends along the first direction to communicate with the sliding channel 16, and a first stepped surface 112 is formed at the extended end of the notch 111.

[0085] The piston rod of the piston assembly 6 is provided with a pump gear 74. The two flanges of the pump gear 74 along the axial direction of the sliding channel 16 extend into the adjacent slots 111, and the bottom of the flanges of the pump gear 74 is limited above the first step surface 112.

[0086] Preferably, the cross-section of the receiving channel 11 is a rectangular cross-section; two opposite sidewalls of the rectangular cross-section are first sidewalls, and the two opposite sidewalls are arranged opposite each other in the axial direction of the sliding channel 16, and the two opposite sidewalls are perpendicular to the axial direction of the sliding channel 16.

[0087] By setting the slot 111 structure, the pump gear 74 is limited within the slots 111 on both sides, thereby achieving radial limiting of the pump gear 74 and improving the stability of power transmission of the pump gear 74.

[0088] The notch 111 extends to communicate with the sliding channel 16 so that the flange of the pump gear 74 extends into the notch 111. By forming a first stepped surface 112 at the extended end of the notch 111, the bottom of the flange of the pump gear 74 is limited above the first stepped surface 112, thereby achieving radial limiting of the pump gear 74, reducing the radial runout of the pump gear 74 during power transmission, and thus improving the stability of power transmission.

[0089] In addition, the design of the rectangular cross-section receiving channel 11, as well as the boss and notch 111, effectively utilizes the space inside the actuator housing 1 while ensuring the normal realization of the braking function. This makes the structure of the entire brake actuator assembly more compact, improves space utilization, and helps to achieve more functions in a limited space.

[0090] It is important to understand that the position of the first stepped surface 112 determines the extension length of the notch 111. Since the flange of the pump gear 74 extends into the notch 111, and the first stepped surface 112 limits the flange of the pump gear 74 above the first stepped surface 112, when the drive motor 2 starts working, under the action of the torque transmitted to the pump gear 74 and the weight of the pump gear 74 itself, the flange of the pump gear 74 will transmit the load-bearing force to the notch 111. The setting of the first stepped surface 112 reduces the radial clearance of the pump gear 74 and limits the working clearance of the gear transmission group 7, which can eliminate part of the radial stress value of the pump gear 74 and improve the stability of power transmission. Furthermore, the reduction of the working clearance can further reduce the offset space of the parts, thereby reducing the wear of the parts and extending their service life.

[0091] Please see Figure 1 and Figure 2 For example, the actuator housing 1 is further provided with a second mounting hole 17 that communicates with the receiving channel 11. The second mounting hole 17 is located between the first mounting hole 12 and the sliding channel 16 and is parallel to the first mounting hole 12. One end of the second mounting hole 17 passes through the actuator housing 1, and the through direction of the second mounting hole 17 is opposite to the through direction of the first mounting hole 12. The second mounting hole 17 is used to install the intermediate drive shaft 71 of the gear transmission assembly 7.

[0092] By providing a second mounting hole 17 to mount the intermediate drive shaft 71, the support stability of the gear transmission assembly 7 is enhanced.

[0093] By providing a second mounting hole 17 to install the intermediate drive shaft 71, the layout of the gear transmission assembly 7 is further improved, making the transmission of the gear transmission assembly 7 smoother and more efficient. The intermediate drive shaft 71 can better transmit power, ensuring the accuracy and stability of power transmission between the drive motor 2 and the piston assembly 6, and reducing power loss or transmission failure that may occur due to unreasonable layout of transmission components.

[0094] The second mounting hole 17 penetrates the actuator housing 1 at one end and the penetration direction is opposite to that of the first mounting hole 12, making the internal structure of the entire brake actuator assembly more reasonable, the cooperation between various components more tight, making reasonable use of the internal space of the actuator housing 1, improving the structural strength and reliability of the entire brake actuator assembly, and providing a strong guarantee for the stable operation of the braking system.

[0095] It should be understood that this application mainly improves the smoothness of power transmission by modifying the internal channels and cavities of the actuator housing 1, optimizing the power transmission structure, and adjusting the interaction between the actuator housing 1 and the power transmission structure to reduce unstable factors such as axial movement and radial runout during power transmission. Specifically, the modification of the internal channels and cavities of the actuator housing 1 mainly includes: the inclusion channel 11, the first mounting hole 12, the second mounting hole 17, the mounting countersunk hole 13, and the notch and stepped structure; the optimization of the power transmission structure mainly includes: the structural design of the needle roller bearing 21, the first limiting cylinder 3, and the second limiting cylinder 4; the interaction between the actuator housing 1 and the power transmission structure mainly includes the stepped structure of the first limiting cylinder 3 and the second limiting cylinder 4 and their connection with the corresponding cavities or holes on the actuator housing 1.

[0096] It should be noted that the intermediate drive shaft 71 is provided with an intermediate gear 73; wherein, the gear transmission group 7 includes a drive gear 72 provided on the first connecting shaft 22, an intermediate gear 73 provided on the intermediate drive shaft 71, a pump gear 74 provided on the piston rod, and the intermediate drive shaft 71.

[0097] Based on the same inventive concept, embodiments of this application also provide a braking system, including a brake actuator assembly.

[0098] The braking system provided in this application, since it includes the aforementioned brake actuator assembly, has all the beneficial effects of the aforementioned brake actuator assembly, and can effectively constrain the power output end of the drive motor 2, thereby improving torque output efficiency and reducing radial runout of the power output end of the drive motor 2.

[0099] The braking system using the above-mentioned brake actuator assembly has significantly improved stability and reliability in terms of braking performance.

[0100] It should be understood that the braking system includes brake shoes; wherein, the piston of the piston assembly 6 is used to extend movably relative to the actuator housing 1 to press against the brake shoes.

[0101] Based on the same inventive concept, embodiments of this application also provide a vehicle including a braking system.

[0102] The vehicle provided in this application, having included the aforementioned braking system, which in turn includes the aforementioned brake actuator assembly, possesses all the beneficial effects of the aforementioned braking system. By configuring the connection structure between the actuator housing 1 and the drive motor 2, effective constraint can be achieved on the power output end of the drive motor 2, thereby improving torque output efficiency and enhancing structural stability.

[0103] The vehicle includes the aforementioned braking system, which in turn includes the aforementioned brake actuator assembly. This reduces instability factors during braking, improves the stability and reliability of braking performance, and more accurately translates the driver's braking commands into actual braking actions, providing reliable braking protection for vehicle operation and enhancing vehicle safety. In emergency situations, it can brake promptly and effectively, preventing accidents and protecting the safety of occupants and the vehicle itself.

[0104] The application of the aforementioned brake actuator assemblies and braking systems is matched to the overall performance requirements of the vehicle. Their rational design and efficient operation help improve the vehicle's handling performance, enabling the driver to control the vehicle's braking more precisely and smoothly, while also ensuring the vehicle's driving stability under various operating conditions, meeting the modern vehicle's requirements for high performance and high reliability of braking systems.

[0105] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A brake actuator assembly, characterized by include: The actuator housing (1) has an internal receiving channel (11) extending along a first direction and a first mounting hole (12) communicating with the receiving channel (11). The first mounting hole (12) is perpendicular to the receiving channel (11) and has one end penetrating the actuator housing (1). The drive motor (2) has its outer side wall connected to the actuator housing (1); the power output end of the drive motor (2) extends into the first mounting hole (12); a needle roller bearing (21) is provided on the power output end; The first mounting hole (12) has a countersunk hole (13) at its through end. The radial dimension of the countersunk hole (13) is greater than that of the first mounting hole (12). The needle roller bearing (21) is located in the countersunk hole (13), and the outer ring of the needle roller bearing (21) abuts against the wall of the countersunk hole (13).

2. The brake actuator assembly of claim 1, wherein, The first mounting hole (12) includes a first hole section (121) and a second hole section (122) respectively disposed on both radial sides of the receiving channel (11). The first hole section (121) connects the mounting countersunk hole (13) and the receiving channel (11), and the second hole section (122) is disposed on the side of the receiving channel (11) away from the mounting countersunk hole (13). The power output end is connected to a first connecting shaft (22), and a drive gear (72) is provided on the first connecting shaft (22); The first connecting shaft (22) is rotatably connected at both ends to the first hole section (121) and the second hole section (122), and the driving gear (72) is placed in the receiving channel (11).

3. The brake actuator assembly of claim 2, wherein, A first stepped hole (14) is provided between the first hole segment (121) and the mounting countersunk hole (13), and the diameter of the first stepped hole (14) decreases from the mounting countersunk hole (13) toward the first hole segment (121); A first limiting cylinder (3) is sleeved on the outer peripheral wall of the first connecting shaft (22) near the drive motor (2), and the first limiting cylinder (3) has a stepped structure; The first limiting cylinder (3) is disposed in the first stepped hole (14) along with the first connecting shaft (22), and the outer peripheral wall of the first limiting cylinder (3) abuts against the hole wall of the first stepped hole (14).

4. The brake actuator assembly of claim 3, wherein, A second limiting cylinder (4) is sleeved on the outer peripheral wall of the end of the first connecting shaft (22) away from the drive motor (2), and the second limiting cylinder (4) has a stepped structure; One end of the second limiting cylinder (4) extends into the second hole section (122) along with the first connecting shaft (22), and the outer peripheral wall of the second limiting cylinder (4) abuts against the inner wall of the second hole section (122); the stepped surface of the second limiting cylinder (4) abuts against the inner wall of the receiving channel (11).

5. The brake actuator assembly of claim 1, wherein, The receiving channel (11) passes through the actuator housing (1) at one end near the drive motor (2), and the end of the receiving channel (11) is covered with a sealing plate (5); The actuator housing (1) has a docking platform (15) on the side facing the sealing plate (5). The docking platform (15) protrudes away from the receiving channel (11), and the side wall of the docking platform (15) abuts against the outer wall of the drive motor (2).

6. The brake actuator assembly of claim 1, wherein, The receiving channel (11) has a sliding channel (16) at one end away from the drive motor (2); the sliding channel (16) is parallel to the first mounting hole (12), and both ends of the sliding channel (16) penetrate the actuator housing (1); The sliding channel (16) is used to install the piston assembly (6), and the receiving channel (11) is used to install the gear transmission group (7); the power output end of the drive motor (2) is connected to the input end of the gear transmission group (7), and the input end of the piston assembly (6) is connected to the output end of the gear transmission group (7).

7. The brake actuator assembly of claim 6, wherein, The two inner sidewalls of the receiving channel (11) that are arranged opposite each other along the axial direction of the sliding channel (16) are defined as the first sidewalls; Each of the first sides is recessed outward from the receiving channel (11) and forms a notch (111), the notch (111) extending along the first direction to communicate with the sliding channel (16), and a first stepped surface (112) is formed at the extended end of the notch (111); The piston rod of the piston assembly (6) is provided with a pump gear (74), and the two flanges of the pump gear (74) along the axial direction of the sliding channel (16) extend into the adjacent slot (111), and the bottom of the flange of the pump gear (74) is limited above the first step surface (112).

8. The brake actuator assembly of claim 7, wherein, The actuator housing (1) is further provided with a second mounting hole (17) communicating with the receiving channel (11). The second mounting hole (17) is located between the first mounting hole (12) and the sliding channel (16) and is parallel to the first mounting hole (12). One end of the second mounting hole (17) passes through the actuator housing (1), and the through direction of the second mounting hole (17) is opposite to the through direction of the first mounting hole (12). The second mounting hole (17) is used to install the intermediate transmission shaft (71) of the gear transmission group (7).

9. A brake system characterized by, Includes the brake actuator assembly as described in any one of claims 1-8.

10. Vehicle, characterized in that Includes the braking system as described in claim 9.

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