An EMB system

Abstract

The utility model belongs to brake technical field discloses an EMB system, it includes the clamp body assembly, shell and be located in the motor, ratchet wheel, pawl and telescopic drive part in the shell, the output shaft of motor is connected with the transmission of clamp body assembly, the motor output shaft direct current or reverse current is used for controlling clamp body assembly to produce or cancel the clamping force, ratchet wheel fixedly is equipped on the output shaft of motor, telescopic drive part includes fixed part and telescopic part, fixed part is fixed in the shell, pawl first end is articulated with the shell, second end is articulated with telescopic part, telescopic part extends in fixed part can drive pawl swing to with the ratchet wheel's ratchet tooth carding and resisting, be equipped with the maintenance mouth on the shell, external traction tool can extend to the maintenance mouth in and pull telescopic part to drive pawl and the ratchet tooth of ratchet wheel separate. The utility model provides EMB system, can effectively release the clamping force of clamp body assembly under the intervention cooperation of external traction tool, is convenient for maintenance.

Description

Technical Field

[0001] This utility model relates to the field of braking technology, and in particular to an EMB system. Background Technology

[0002] Electro-Mechanical Braking (EMB) is a braking system that uses electrical and mechanical components to decelerate or stop a vehicle, combining the functions of service braking and parking braking. It applies braking force using an electric motor or actuator, effectively replacing the traditional hydraulic drive method. This results in more precise control, significantly improved braking performance, a reduction in the number of hydraulic components, more stable operation, and easier maintenance.

[0003] In existing technologies, the parking mechanism of most EMB systems is an electromagnet-driven ratchet and pawl structure, which works in conjunction with a motor. However, when the electromagnet fails, the moving iron core of the electromagnet cannot move, causing the ratchet and pawl to remain stuck. This prevents the clamping force of the clamp assembly from being released, the parking brake from being released, and the wheels from being clamped, making maintenance difficult. Utility Model Content

[0004] The purpose of this invention is to provide an EMB system that can effectively release the clamping force of the clamp assembly with the intervention of an external traction tool, making maintenance easier.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An EMB system includes a clamp assembly, a housing, and a motor, ratchet, pawl, and telescopic drive unit disposed within the housing; wherein,

[0007] The output shaft of the motor is connected to the clamp assembly for transmission. The forward or reverse rotation of the output shaft of the motor is used to control the clamp assembly to generate or release clamping force.

[0008] The ratchet is fixedly sleeved on the output shaft of the motor. The telescopic drive includes a fixed part and a telescopic part. The fixed part is fixed inside the housing. The first end of the pawl is hinged to the housing. The second end of the pawl is hinged to the telescopic part. The telescopic part extends out of the fixed part and can drive the pawl to swing until it engages with the ratchet teeth on the ratchet.

[0009] The outer casing is provided with a maintenance port, and an external traction tool can be inserted into the maintenance port and pull the telescopic part to cause the pawl to separate from the ratchet teeth of the ratchet.

[0010] Preferably, the telescopic drive component includes an electromagnet, and the fixed part and the telescopic part are respectively the valve body and the moving iron core of the electromagnet.

[0011] Preferably, the telescopic part is disposed through the fixed part, and the end of the telescopic part facing away from the pawl is provided with a sleeve part for the external traction tool to be sleeved.

[0012] Preferably, the maintenance port is detachably provided with a cover plate.

[0013] Preferably, the cover plate has a first mounting hole, and the outer shell has a second mounting hole on the outer edge of the maintenance opening. The screw connector passes through the first mounting hole and is threadedly connected to the second mounting hole.

[0014] Preferably, a sealing ring is provided between the cover plate and the outer edge of the maintenance port.

[0015] Preferably, the outer edge of the maintenance port is provided with an annular groove, and the sealing ring is embedded in the annular groove.

[0016] Preferably, the first end of the pawl is hinged to the outer casing via a first pin, and the second end of the pawl is hinged to the telescopic part via a second pin.

[0017] Preferably, the housing contains a first gear, a second gear, and a third gear. The first gear is fixedly mounted on the output shaft of the motor, the second gear is rotatably connected to the housing, and the third gear is connected to the planetary gear of the clamp assembly. The first gear meshes with the second gear, and the second gear meshes with the third gear.

[0018] Preferably, the outer casing includes an upper casing and a lower casing, the maintenance port is opened in the lower casing, the upper casing and the lower casing are fastened together to form an inner cavity, and the motor, the ratchet, the pawl and the telescopic drive are all located in the inner cavity.

[0019] Beneficial effects:

[0020] The EMB system provided by this utility model has a maintenance port on the outer shell corresponding to the telescopic drive component. When the telescopic drive component malfunctions and the telescopic part cannot retract effectively on its own, an external traction tool can be inserted into the maintenance port and pull the telescopic part, causing it to retract into the fixed part under external force. After the telescopic part is pulled, it can cause the pawl and the ratchet teeth of the ratchet wheel to separate, thereby releasing the jamming state between the ratchet wheel and the pawl, effectively releasing the clamping force of the clamp assembly, releasing the parking brake, and unclamping the wheels, facilitating vehicle movement for maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the EMB system provided by this utility model;

[0022] Figure 2 This is a partial structural schematic diagram of the EMB system provided by this utility model;

[0023] Figure 3 This is an exploded view of the EMB system provided by this utility model;

[0024] Figure 4 This is a schematic diagram showing that the ratchet and pawl inside the EMB system provided by this utility model are not engaged.

[0025] Figure 5 This is a schematic diagram of the ratchet and pawl engaging inside the EMB system provided by this utility model;

[0026] Figure 6 This is a schematic diagram of the telescopic part of the external traction tool provided by this utility model.

[0027] In the picture:

[0028] 1. Clamp body assembly;

[0029] 2. Outer shell; 21. Upper shell; 211. Sealing ring; 22. Lower shell; 221. Maintenance port; 2211. Second mounting hole; 2212. Annular groove; 222. Cover plate; 2221. First mounting hole; 23. Threaded connector; 241. First gear; 242. Second gear; 243. Third gear;

[0030] 3. Electric motor;

[0031] 4. Ratchet;

[0032] 5. Claw; 51. First pin; 52. Second pin;

[0033] 6. Telescopic drive component; 61. Fixing part; 62. Telescopic part; 63. Sleeving part. Detailed Implementation

[0034] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] This embodiment provides an EMB system. (Refer to...) Figures 1 to 6As shown, the EMB system includes a clamp assembly 1, a housing 2, and a motor 3, a ratchet 4, a pawl 5, and a telescopic drive 6 housed within the housing 2. The output shaft of the motor 3 is connected to the clamp assembly 1, and its forward or reverse rotation controls the clamp assembly 1 to generate or release clamping force. The ratchet 4 is fixedly mounted on the output shaft of the motor 3. The telescopic drive 6 includes a fixed part 61 and a telescopic part 62. The fixed part 61 is fixed within the housing 2. The first end of the pawl 5 is hinged to the housing 2, and the second end of the pawl 5 is hinged to the telescopic part 62. The telescopic part 62 extends from the fixed part 61 and can drive the pawl 5 to swing until it engages with the ratchet teeth of the ratchet 4. The housing 2 has a maintenance port 221, allowing an external traction tool to be inserted into the maintenance port 221 and pull the telescopic part 62 to separate the pawl 5 from the ratchet teeth of the ratchet 4.

[0039] In this embodiment, the outer casing 2 is provided with a maintenance port 221 corresponding to the telescopic drive component 6. When the telescopic drive component 6 malfunctions and the telescopic part 62 cannot retract effectively on its own, an external traction tool can be inserted into the maintenance port 221 and pull the telescopic part 62, causing the telescopic part 62 to retract into the fixed part 61 under the pull of external force. After the telescopic part 62 is pulled, it can drive the pawl 5 to separate from the ratchet 4, thereby releasing the jamming state between the ratchet 4 and the pawl 5, so that the clamping force of the clamp assembly 1 is effectively released, the parking can be released, the wheels are released from the clamping state, and it is convenient for the vehicle to be moved for maintenance.

[0040] In this embodiment, the rotation of motor 3 around the first direction is defined as the forward direction, and the rotation of motor 3 around the second direction is defined as the reverse direction. When not parked, refer to... Figure 4 As shown, pawl 5 disengages from ratchet 4. When a parking request is received, refer to... Figure 5 As shown, motor 3 rotates in a first direction. A transmission assembly is provided between motor 3 and the planetary gears of clamp assembly 1. The rotation of the output shaft of motor 3 drives the planetary gears of clamp assembly 1 through the transmission assembly, which in turn drives the ball screw structure, pushing the friction plate to generate a clamping force on the wheel. When the clamping force reaches the target value, the telescopic drive 6 is activated. The telescopic part 62 of the telescopic drive 6 extends outward, causing the pawl 5 to swing towards the ratchet 4, so that the pawl 5 engages with the ratchet teeth of the ratchet 4. At this time, the torque of motor 3 is released, and the ratchet 4 tends to rotate in a second direction. However, due to the limitation of the pawl 5 structure, the ratchet 4 cannot rotate, thus achieving the parking clamping force.

[0041] When the telescopic drive component 6 is working normally, upon receiving a parking release request, the telescopic part 62 of the telescopic drive component 6 retracts relative to the fixed part 61. At this time, the telescopic part 62 drives the pawl 5 to swing away from the ratchet 4, causing the pawl 5 to disengage from the ratchet 4 teeth. The motor 3 can then rotate counterclockwise to release the clamping force. When the telescopic drive component 6 malfunctions and cannot work normally, the telescopic part 62 of the telescopic drive component 6 cannot retract relative to the fixed part 61, and cannot drive the pawl 5 to swing away from the ratchet 4, preventing the pawl 5 from disengaging from the ratchet 4 teeth. The motor 3 cannot rotate. In this case, an external traction tool needs to be used, inserted into the maintenance port 221, and forcibly pulled on the telescopic part 62 to forcefully retract the telescopic part 62 relative to the fixed part 61, thereby causing the pawl 5 to separate from the ratchet 4 teeth. The motor 3 can then rotate counterclockwise to release the clamping force.

[0042] In this embodiment, the maintenance port 221 is positioned opposite to the telescopic drive member 6. Specifically, the end of the telescopic part 62 connected to the pawl 5 is the first end, and the second end of the telescopic part 62 extends out of the fixing part 61, with the maintenance port 221 and the second end of the telescopic part 62 positioned opposite each other.

[0043] In this embodiment, the telescopic drive component 6 includes an electromagnet, with the fixed part 61 and the telescopic part 62 serving as the valve body and moving iron core of the electromagnet, respectively. The electromagnet has a simple structure, rapid response, and reliable and stable operation.

[0044] In this embodiment, the telescopic part 62 is disposed through the fixed part 61, and the end of the telescopic part 62 facing away from the pawl 5 is provided with a sleeve part 63 for an external traction tool to be sleeved on. Specifically, the external traction tool can be a ring-shaped structure formed by bending a steel wire into a closed loop. By sleeved on the sleeve part 63, the telescopic part 62 can be pulled. Specifically, the sleeve part 63 can be a sleeve head provided at the end of the telescopic part 62 facing away from the pawl 5, and the diameter of the sleeve head is larger than the diameter of the telescopic part 62. This arrangement facilitates the sleeved and pulled operation of the ring-shaped structure.

[0045] In this embodiment, a cover plate 222 is detachably provided on the maintenance port 221. The cover plate 222 is provided to cover the maintenance port 221 when it is not in use, so as to prevent external moisture and dust from entering.

[0046] Specifically, the cover plate 222 has a first mounting hole 2221, and the outer shell 2 has a second mounting hole 2211 on the outer edge of the maintenance opening 221. The screw connector 23 passes through the first mounting hole 2221 and is threadedly connected to the second mounting hole 2211. Specifically, both the cover plate 222 and the maintenance opening 221 are rectangular. The rectangular cover plate 222 has a first mounting hole 2221 at each of its four corners, and the maintenance opening 221 has a second mounting hole 2211 on the outer edge of each of its four corners. The first mounting hole 2221, the second mounting hole 2211, and the screw connector 23 are arranged in a one-to-one correspondence.

[0047] Specifically, the threaded component 23 can be a screw or a bolt.

[0048] In this embodiment, a sealing ring 211 is also provided between the outer edge of the cover plate 222 and the maintenance port 221. The sealing ring 211 can further seal the gap between the cover plate 222 and the maintenance port 221, ensuring airtightness and preventing external moisture and dust from entering. The sealing ring 211 can be made of rubber.

[0049] Furthermore, an annular groove 2212 is provided on the outer edge of the maintenance port 221, and the sealing ring 211 is embedded in the annular groove 2212. Specifically, the annular groove 2212 allows for reliable and stable installation of the sealing ring 211, ensuring effective positioning of the sealing ring 211 and guaranteeing the sealing effect.

[0050] In this embodiment, the first end of the pawl 5 is hinged to the outer casing 2 via a first pin 51, and the second end of the pawl 5 is hinged to the telescopic part 62 via a second pin 52. Specifically, both the first pin 51 and the second pin 52 are configured as pins. The first end of the pawl 5 has a first pin hole for the first pin 51 to pass through, and the second end of the pawl 5 has a second pin hole for the second pin 52 to pass through. Specifically, the second pin hole is configured as an elongated hole, allowing the second pin 52 to slide within the second pin hole, thereby realizing the relative positional change between the pawl 5 and the telescopic part 62 and preventing jamming between the pawl 5 and the telescopic part 62.

[0051] In this embodiment, the outer casing 2 is provided with a first gear 241, a second gear 242, and a third gear 243. The first gear 241 is fixedly sleeved on the output shaft of the motor 3, the second gear 242 is rotatably connected to the outer casing 2, and the third gear 243 is connected to the planetary gears of the clamp assembly 1. The first gear 241 is meshed with the second gear 242, and the second gear 242 is meshed with the third gear 243. Specifically, the transmission assembly includes the first gear 241, the second gear 242, and the third gear 243. The motor 3 rotates around a first direction, and a transmission assembly is provided between the motor 3 and the planetary gears of the clamp assembly 1. The rotation of the output shaft of the motor 3 sequentially drives the first gear 241, the second gear 242, and the third gear 243 to rotate, thereby driving the planetary gears of the clamp assembly 1, which in turn drives the ball screw structure, pushing the friction plate to generate a clamping force on the wheel.

[0052] In this embodiment, the outer shell 2 includes an upper shell 21 and a lower shell 22. A maintenance port 221 is provided in the lower shell 22. The upper shell 21 and the lower shell 22 are interlocked to form an inner cavity. The motor 3, ratchet 4, pawl 5, and telescopic drive 6 are all located within the inner cavity. Specifically, the upper shell 21 and the lower shell 22 can be fixed by a snap-fit ​​structure or by screws and bolts; this embodiment does not impose any limitation.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An EMB system, characterized in that, It includes a clamp body assembly (1), a housing (2), and a motor (3), a ratchet (4), a pawl (5), and a telescopic drive component (6) disposed within the housing (2); wherein, The output shaft of the motor (3) is connected to the clamp assembly (1) for transmission. The forward or reverse rotation of the output shaft of the motor (3) is used to control the clamp assembly (1) to generate or release clamping force. The ratchet (4) is fixedly sleeved on the output shaft of the motor (3). The telescopic drive (6) includes a fixed part (61) and a telescopic part (62). The fixed part (61) is fixed inside the housing (2). The first end of the pawl (5) is hinged to the housing (2). The second end of the pawl (5) is hinged to the telescopic part (62). The telescopic part (62) extends out of the fixed part (61) and can drive the pawl (5) to swing until it engages with the ratchet teeth of the ratchet (4). The outer casing (2) is provided with a maintenance port (221), and an external traction tool can be inserted into the maintenance port (221) and pull the telescopic part (62) to drive the pawl (5) to separate from the ratchet teeth of the ratchet (4).

2. The EMB system according to claim 1, characterized in that, The telescopic drive component (6) includes an electromagnet, and the fixed part (61) and the telescopic part (62) are the valve body and the moving iron core of the electromagnet, respectively.

3. The EMB system according to claim 1, characterized in that, The telescopic part (62) is disposed through the fixed part (61), and the end of the telescopic part (62) facing away from the pawl (5) is provided with a sleeve part (63) for the external traction tool to be sleeved.

4. The EMB system according to claim 1, characterized in that, The maintenance port (221) is detachably equipped with a cover plate (222).

5. The EMB system according to claim 4, characterized in that, The cover plate (222) has a first mounting hole (2221), and the outer shell (2) has a second mounting hole (2211) on the outer edge of the maintenance port (221). The screw connector (23) passes through the first mounting hole (2221) and is threadedly connected to the second mounting hole (2211).

6. The EMB system according to claim 4, characterized in that, A sealing ring (211) is also provided between the outer edge of the cover plate (222) and the maintenance port (221).

7. The EMB system according to claim 6, characterized in that, The outer edge of the maintenance port (221) is provided with an annular groove (2212), and the sealing ring (211) is embedded in the annular groove (2212).

8. The EMB system according to claim 1, characterized in that, The first end of the pawl (5) is hinged to the outer shell (2) via a first pin (51), and the second end of the pawl (5) is hinged to the telescopic part (62) via a second pin (52).

9. The EMB system according to claim 1, characterized in that, The housing (2) is provided with a first gear (241), a second gear (242) and a third gear (243). The first gear (241) is fixedly sleeved on the output shaft of the motor (3). The second gear (242) is rotatably connected to the housing (2). The third gear (243) is connected to the planetary gear of the clamp assembly (1). The first gear (241) is meshed with the second gear (242), and the second gear (242) is meshed with the third gear (243).

10. The EMB system according to claim 1, characterized in that, The outer shell (2) includes an upper shell (21) and a lower shell (22). The maintenance port (221) is opened in the lower shell (22). The upper shell (21) and the lower shell (22) are fastened together to form an inner cavity. The motor (3), the ratchet (4), the pawl (5) and the telescopic drive (6) are all located in the inner cavity.

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