Search

DE-102025146289-A1 - VEHICLE, BRAKE SYSTEM, BRAKE AND METHOD FOR MONITORING BRAKE STATUS

DE102025146289A1DE 102025146289 A1DE102025146289 A1DE 102025146289A1DE-102025146289-A1

Abstract

The present invention discloses a vehicle, a braking system, a brake, and a method for monitoring the braking condition. In the brake, the flange rotor is connected to the motor shaft and additionally to the stator via a rolling connection, so that the flange rotor can rotate together with the shaft of the brake motor relative to the stator. A slotted disk is arranged on the stator; an armature is connected to the flange rotor via a spring element, so that the armature can move back and forth between the flange rotor and the slotted disk along the axis of the flange rotor; a permanent magnet generates a first magnetic force on the armature. When the coil is de-energized, the first magnetic force opposes the restoring force, causing the armature to move towards the slotted disk and engage with it. When the coil is energized, it generates a second magnetic force on the armature. The combined force of the second magnetic force and the restoring force opposes the first magnetic force, causing the armature to move towards the flange rotor and release from the slotted disk. This achieves the locking and unlocking of the corresponding brake motor. The brake is integrated into the motor, which reduces the size, noise and energy loss of the braking system and decreases manufacturing and testing difficulties.

Inventors

  • Dongsheng Zhang
  • Zhenfei Hu
  • Yan Lv

Assignees

  • NEXTEER AUTOMOTIVE (SUZHOU) CO., LTD.

Dates

Publication Date
20260513
Application Date
20251110
Priority Date
20241111

Claims (20)

  1. A de-energized braking system comprising: a brake motor shaft; a stator arranged coaxially around the brake motor shaft; a flange rotor connected to the brake motor shaft and the stator via a rolling bearing, such that a flange rotor rotates with the brake motor shaft relative to the stator; an armature connected to the flange rotor; and a coil which: (i) in a de-energized state causes the armature to engage a slotted disk, thereby locking the brake motor shaft; and (ii) in a energized state causes the armature to disengage the slotted disk, thereby releasing the brake motor shaft.
  2. de-energized braking system according to Claim 1 , further comprising a microswitch located on the stator.
  3. de-energized braking system according to Claim 2 , whereby the microswitch is in an on state in response to the armature engaging with the slotted disk.
  4. de-energized braking system according to Claim 2 , whereby the microswitch is in an off state in response to the armature being released from the slotted disk.
  5. de-energized braking system according to Claim 2 , wherein the microswitch comprises two micro spring leaves, a state sensing element and an output terminal.
  6. De-energized braking system according to Claim 5 , wherein the first sections of the two microspring leaves and the output terminal are separately connected to the state sensing element.
  7. de-energized braking system according to Claim 6 , wherein end sections of the microspring leaves extend beyond the slotted disk in a first direction, so that the two microspring leaves are separated in response to the anchor being released from the slotted disk.
  8. de-energized braking system according to Claim 6 , wherein the two micro-spring leaves are connected by the armature in response to the armature engaging with the slotted disk.
  9. de-energized braking system according to Claim 5 , wherein the state detection element: generates a detachment state signal in response to the separation of the two micro-spring leaves; and outputs the detachment state signal via the output terminal.
  10. de-energized braking system according to Claim 5 , wherein the state sensing element: generates an engagement state signal in response to the two micro-spring leaves being connected; and outputs the engagement state signal via the output terminal.
  11. de-energized braking system according to Claim 1 , further comprising an elastic element comprising a disc spring or a leaf spring.
  12. An electromechanical braking system comprising: a brake disc; a brake caliper; a gearbox; a brake motor; and a motor assembly comprising a de-energized braking system comprising: a stator and a flange rotor stacked coaxially and wound around a rotating shaft of the brake motor; a rolling bearing; a slotted disc; an armature; an elastic element; a permanent magnet; and a coil, wherein: a side of the stator furthest from the flange rotor is connected to an end cover of the brake motor; the flange rotor is connected to the rotating shaft of the brake motor and also to the stator via the rolling bearing, so that the flange rotor can rotate relative to the stator together with the rotating shaft of the brake motor; the slotted disc is arranged on a side of the stator close to the flange rotor; The anchor is arranged between the slotted disk and the flange rotor and is connected to the flange rotor via the elastic element, so that the anchor moves between the flange rotor and the slotted disk along an axial direction of the flange. The rotor can move back and forth, and a slot shape on the slotted disk matches a shape of the armature directly facing the slot; the permanent magnet is arranged on the stator, the permanent magnet generating a first magnetic force on the armature, the first magnetic force being opposite to a restoring force of the elastic element on the armature, and the first magnetic force being greater than the restoring force of the elastic element on the armature; when the coil is de-energized, the first magnetic force resists the restoring force, so that the armature moves towards the slotted disk and engages accordingly in the slotted disk to lock the rotating shaft of the brake motor; and the coil is arranged on the stator, wherein, after energization, the coil generates a second magnetic force on the armature, wherein the second magnetic force is in the opposite direction to the first magnetic force and a resultant force of the second magnetic force and the restoring force is greater than the first magnetic force, wherein, when the coil is energized, the resultant force of the second magnetic force and the restoring force resists the first magnetic force, so that the armature moves towards the flange rotor and releases from the slotted disk to release the rotating shaft of the brake motor.
  13. Electromechanical braking system according to Claim 12 , wherein the motor arrangement further comprises a protective ring; one end of the protective ring is wound and mounted on a side surface of an end cover of the brake motor and forms an annular groove with an outer surface of the end cover and the rotating shaft of the brake motor; and the de-energized braking unit is arranged in the annular groove, the stator of the de-energized braking unit is connected to the end cover via a bolt, and the flange rotor of the de-energized braking unit is connected to the rotating shaft via a toothed shaft connection.
  14. Electromechanical braking system according to Claim 13 , wherein the motor arrangement further comprises a first heat-insulating damping disk and a second heat-insulating damping disk; the first heat-insulating damping disk is arranged between the stator and the end cover and is used to reduce heat propagation and vibration propagation between the stator and the end cover; and the second heat-insulating damping disk is arranged between an end face of the guard ring and the gearbox and is used to reduce heat propagation and vibration propagation between the de-energized braking system and the gearbox.
  15. Electromechanical braking system according to Claim 13 , where the electromechanical braking system is assigned to a vehicle.
  16. A condition monitoring procedure for a power failure controller, comprising: Monitoring a real-time current in the coil in response to the coil being energized; Determining that an armature of the power failure controller is released in response to the real-time current in the coil exhibiting a sudden rising inflection point; and Determining that the armature of the power failure controller is engaged in response to the real-time current in the coil exhibiting a sudden falling inflection point.
  17. Condition monitoring procedures according to Claim 16 , furthermore encompassing the monitoring of the state of a microswitch in response to the monitoring of the real-time current in the coil.
  18. Condition monitoring procedures according to Claim 17 , furthermore, including determining that the armature of the power failure controller is released in response to the microswitch state indicating that the microswitch is off.
  19. Condition monitoring procedures according to Claim 17 , furthermore, including determining that the armature of the power failure controller is indented in response to the microswitch state indicating that the microswitch is turned on.
  20. Condition monitoring procedures according to Claim 16 , where the coil is assigned to a brake that brakes without current.

Description

AREA OF INVENTION The present invention relates to the field of vehicle manufacturing and in particular to a vehicle, a braking system, a brake and a method for monitoring the brake condition. STATE OF THE ART With the rapid development of the automotive industry and related technology fields, electromechanical braking systems have become a research focus for numerous automotive companies and scientific research institutions. Electromechanical braking systems often use a ratchet and pawl structure or an electromagnetic brake to lock the braking mechanism, thereby providing additional braking power and improving braking safety. However, both existing ratchet and pawl designs and conventional electromagnetic brakes have significant limitations. Ratchet and pawl designs are associated with problems such as large size, high energy loss, and significant noise. Conventional electromagnetic brakes are difficult to manufacture and cumbersome to monitor. These disadvantages hinder the further development of electromechanical braking systems. REVELATION OF THE INVENTION The present invention provides a vehicle, a braking system, a brake and a method for monitoring the braking condition to reduce the size, noise and energy loss and to decrease manufacturing and testing difficulties. According to one aspect of the present invention, a de-energized braking system is provided which is applied to a brake motor of an electromechanical braking system; wherein the de-energized braking system comprises: a stator and a flange rotor, which are stacked coaxially and arranged around the rotating shaft of the brake motor, as well as a rolling bearing, a slotted disk, an armature, a spring element, a permanent magnet and a coil; wherein the side of the stator facing away from the flange rotor is connected to the end cover of the brake motor; wherein the flange rotor is connected to the shaft of the brake motor and is also connected to the stator via the rolling bearing, so that the flange rotor can rotate together with the shaft of the brake motor relative to the stator; wherein the slotted disk is arranged on one side of the stator close to the stator; wherein the armature is arranged between the slotted disk and the flange rotor and is connected to the flange rotor via the spring element, so that the armature can move back and forth between the flange rotor and the slotted disk along the axis of the flange rotor; wherein the shape of the recesses on the slotted disk matches the shape of the armature opposite it; wherein the permanent magnet is arranged on the stator and generates a first magnetic force on the armature, wherein the first magnetic force acts opposite to the restoring force of the spring element on the armature and the first magnetic force is greater than the restoring force of the spring element on the armature; wherein, with the coil de-energized, the first magnetic force opposes the restoring force, causing the armature to move towards the slotted disk and engage with the slotted disk accordingly to block the shaft of the brake motor; wherein the coil is arranged on the stator and when the coil is energized, the coil generates a second magnetic force on the armature, wherein the second magnetic force acts opposite to the first magnetic force, and the combined force of the second magnetic force and the restoring force is greater than the first magnetic force; wherein, when the coil is energized, the combined force of the second magnetic force and the restoring force opposes the first magnetic force, causing the armature to move towards the flange rotor and to release from the slotted disk, thereby releasing the shaft of the brake motor. Optionally, the de-energized braking system also includes: a microswitch; wherein the microswitch is arranged on the stator and the microswitch is switched on when the armature engages with the slotted disk, and is switched off when the armature detaches from the slotted disk. Optionally, the microswitch comprises two microsprings, a state sensing element, and an output terminal, wherein the roots of the two microsprings and the output terminal are each connected to the state sensing element, and the ends of the microsprings extend beyond the slotted disk in a first direction, such that the two microsprings are separated when the armature releases from the slotted disk, and the two microsprings are switched on via the armature when the armature engages the slotted disk; wherein the state detection element serves to detect, in the event of the separation of the two microsprings, a to generate a release state signal and output it externally via the output terminal, and in the case of switching on the two micro-springs, an engagement state signal, and to generate a pull-in state signal and output it externally via the output terminal. Optionally, the spring element includes a disc spring or a leaf spring. According to a further aspect of the present invention, an electromechanical bra