CN117905881A - Parking locking mechanism for electromechanical brake actuator and working method - Google Patents
Parking locking mechanism for electromechanical brake actuator and working method Download PDFInfo
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- CN117905881A CN117905881A CN202410306688.XA CN202410306688A CN117905881A CN 117905881 A CN117905881 A CN 117905881A CN 202410306688 A CN202410306688 A CN 202410306688A CN 117905881 A CN117905881 A CN 117905881A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 79
- 230000017525 heat dissipation Effects 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 230000005674 electromagnetic induction Effects 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 5
- 239000004519 grease Substances 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 4
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- 208000032370 Secondary transmission Diseases 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
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- 238000005299 abrasion Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The invention discloses a parking locking mechanism for an electromechanical brake actuator, which comprises an electromagnetic locking assembly arranged in a motor shell and a locking disc fixed on a driving shaft of a driving motor, wherein a plurality of locking holes which are uniformly distributed in circumference are formed in the locking disc; the electromagnetic locking assembly comprises an electromagnetic driving telescopic component and a locking head connected with the output end of the electromagnetic driving telescopic component, and the locking head stretches into the locking hole. According to the parking locking mechanism for the electromechanical brake actuator and the working method, the electromagnetic locking assembly is matched with the locking disc fixed on the driving gear shaft to lock, and the driving gear is low in torque, so that the impact on the locking head is small, and the service life of the mechanism can be prolonged.
Description
Technical Field
The invention relates to the technical field of automobile braking, in particular to a parking locking mechanism for an electromechanical brake actuator and a working method.
Background
With the development of vehicles to electric and intelligent, a brake-by-wire system gradually becomes a great development trend of the automobile industry, and an electromechanical brake system serving as one of the brake-by-wire systems is an important development direction in the automobile chassis industry at present.
Meanwhile, in order to further improve the parking stability of the electromechanical brake system, the following locking mechanism is disclosed in the prior art:
CN202120536338.4 a vehicle brake parking mechanism and a vehicle, wherein the vehicle brake parking mechanism comprises: brake device and parking device. The braking device is provided with a braking part; the parking device is provided on the brake device to lock or unlock the brake device, and includes: the locking assembly is arranged on at least one part of the braking part, and the driving structure can drive the locking assembly to lock or unlock the braking part. When the locking mechanism performs the function, the electromagnetic valve has no accurate control function, the electromagnetic valve, the pawl and the ratchet wheel are in rigid contact, and the push rod, the pawl and the ratchet wheel of the electromagnetic valve are made of metal materials, so that huge impact is easily caused between parts. Hundreds of thousands of impacts can damage the functional parts of the locking mechanism, thereby leading to failure of the locking function and the parking function;
an electromechanical parking brake disclosed in US6561321B1, in which a locking mechanism is arranged in an electromechanical brake, occupies a relatively large axial space, and is difficult to meet the space requirement of a wheel end in actual loading application, particularly the space requirement related to steering, so that the arrangement of the locking mechanism is very difficult;
CN202223117034.8 discloses a parking brake locking device, which comprises an actuator housing, a transmission gear structure arranged on the actuator housing, and a locking mechanism for locking the transmission gear structure for parking, wherein the locking mechanism comprises a locking part and a locking driving part for driving the locking part to stretch out and draw back, a groove for accommodating the locking driving part is arranged on the actuator housing, and elastic buffer elements are arranged between the locking driving part and the groove and on the non-matching side of the locking part. Because the electromagnetic valve of the locking device adopts a cylindrical structure, the locking function does not exist, and the breaking failure is easy to cause in the operation process. Meanwhile, as the locking position is positioned at the position of the secondary transmission gear, the gear rotating speed is lower, the torque is larger, the abrasion of the push rod of the electromagnetic valve is easy to cause, and the service life of the push rod is reduced. In addition, the locking shaft comprises a position sensor for sensing the telescopic state of the locking shaft, and the position sensor is additionally arranged, so that the cost is high.
In summary, in the prior art, the scheme adopted by the parking locking mechanism mainly comprises: 1. the pawl is pushed by the electromagnetic valve to be inserted into the ratchet wheel, so that the motor gear or the secondary transmission gear is locked; 2. the push rod is pushed by the electromagnetic valve to be directly inserted into the gear locking component, so that the gear is locked. The locking mechanism has the problems of space waste, difficult precise control, large impact, poor heat dissipation and the like.
Disclosure of Invention
In order to solve the above problems, the present invention provides a parking lock mechanism for an electromechanical brake actuator and a working method thereof, wherein an electromagnetic lock assembly is matched with a lock plate fixed on a driving gear shaft to perform locking, and the torque of the driving gear is low, so that the impact on the lock head is small, and the service life of the mechanism can be prolonged.
In order to achieve the above object, the present invention provides a parking lock mechanism for an electromechanical brake actuator, which comprises an electromagnetic lock assembly disposed in a motor casing and a lock disk fixed on a driving shaft of a driving motor, wherein the lock disk is provided with a plurality of lock holes uniformly distributed in circumference;
The electromagnetic locking assembly comprises an electromagnetic driving telescopic component and a locking head connected with the output end of the electromagnetic driving telescopic component, and the locking head stretches into the locking hole.
Preferably, the electromagnetic locking assembly comprises a shell, a first end magnet, a second end magnet and a bistable electromagnet, wherein the first end magnet and the second end magnet are respectively fixed at two ends of the shell, the bistable electromagnet is arranged in the shell in a sliding manner, the bistable electromagnet is connected with one end of a locking head, and the other end of the locking head penetrates out of the shell through the first end magnet;
The bistable electromagnet and the locking head are coaxially arranged.
Preferably, the bistable electromagnet comprises a sliding iron core, a positioning frame arranged on the outer circumference side of the sliding iron core and a coil wound on the positioning frame;
A moving gap is reserved between the sliding iron core and the locating rack, and the locating rack is fixed in the shell.
Preferably, an intermediate magnet is fixed between the positioning frame and the shell, and the intermediate magnet is positioned between the first end electromagnet and the second end electromagnet;
The first end magnet, the second end magnet and the middle magnet are all permanent magnets, the magnetic field directions of the first end magnet and the middle magnet are opposite, and the magnetic field directions of the middle magnet and the second end magnet are the same.
Preferably, the shell comprises a main body and an end cover fixed at one end of the main body, wherein the main body and the end cover are made of aluminum alloy materials, and the end cover is provided with a locking head in a penetrating way.
Preferably, the positioning frame is axially wound with at least one section of coil;
Each section of coil is electrically connected with a power supply through a control circuit board, and the control circuit board is welded at the top end of the electromagnetic locking assembly;
the control circuit board is integrated with a current sensor for detecting the electrified current of each section of coil, a magnetic field intensity sensor for detecting the magnetic field intensity generated by the sliding iron core, a direct current power supply and a switching power tube, wherein the current sensor and the magnetic field intensity sensor are connected with the input end of the switching power tube through a logic control circuit, and the output end of the switching power tube is respectively and electrically connected with each section of coil.
Preferably, the locating rack is the king font, and the intermediate position of locating rack is fixed with middle magnet, and twines respectively on the locating rack of both sides about the middle magnet top coil and bottom coil, and top coil and bottom coil all are through control circuit board and power electric connection.
Preferably, the electromagnetic locking assembly is arranged in the motor casing, a containing groove for containing the electromagnetic locking assembly is formed in the motor casing, a positioning groove is formed in the inner wall of the containing groove and faces the position of the electromagnetic locking assembly, and a positioning protrusion clamped into the positioning groove is fixed on the outer wall of the casing of the electromagnetic locking assembly;
Heat dissipation silicone grease is filled between the motor shell and the shell.
Preferably, the motor casing is aluminum alloy material, is fixed with the strengthening rib or the fin form arch that are used for increasing heat radiating area on the outer wall of motor casing.
The method for operating the parking lock mechanism for the electromechanical brake actuator includes a brake lock-up process and a brake release process:
the braking locking process comprises the following steps:
firstly, starting a brake to generate braking force until the braking force reaches a set value; the coil is electrified, a magnetic field is generated by the sliding iron core according to an electromagnetic induction principle, the magnetic field direction of the sliding iron core is the same as that of the second end magnet, meanwhile, the magnetic field direction of the sliding iron core is opposite to that of the middle magnet, the sliding iron core moves from the second end magnet towards the middle magnet until the middle position of the sliding iron core passes through the middle magnet, the magnetic field direction of the sliding iron core is the same as that of the middle magnet, meanwhile, the magnetic field direction of the sliding iron core is opposite to that of the first end magnet, the sliding iron core moves from the middle magnet towards the first end magnet until the sliding iron core is attracted with the first end magnet, and the sliding iron core drives the locking head to be inserted into the locking hole on the locking disc;
The brake release process comprises the following steps:
The brake is released, the coil is electrified reversely, the sliding iron core generates an opposite magnetic field according to the electromagnetic induction principle, the magnetic field direction of the sliding iron core is the same as that of the first end magnet, meanwhile, the magnetic field direction of the sliding iron core is opposite to that of the middle magnet, the sliding iron core moves from the second end magnet towards the middle magnet until the middle position of the sliding iron core passes through the middle magnet, the magnetic field direction of the sliding iron core is the same as that of the middle magnet, meanwhile, the sliding iron core moves from the middle magnet towards the second end magnet until the sliding iron core is attracted by the second end magnet, the sliding iron core drives the locking head to be pulled out from the locking hole on the locking disc, and locking is released.
The invention has the following beneficial effects:
The locking disc is arranged on the driving gear shaft, so that the impact on the locking head is small due to low torque of the driving gear, the service life of the mechanism can be prolonged, the stress requirement on the whole mechanism is low, and the whole parking system can be used for larger and heavier vehicle types; the bistable electromagnet with smaller volume is further designed, the manufacturing cost of the parking locking mechanism is reduced, and meanwhile, the volume of the electromechanical brake actuator is reduced.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
Fig. 1 is an assembly view of a parking lock mechanism for an electromechanical brake actuator according to the present invention;
Fig. 2 is a cross-sectional view of an electromagnetic locking assembly of a parking lock mechanism for an electro-mechanical brake actuator according to the present invention;
fig. 3 is an external view of an electromagnetic locking assembly of a parking lock mechanism for an electro-mechanical brake actuator according to the present invention;
Fig. 4 is an installation view of an electromagnetic locking assembly of a parking lock mechanism for an electro-mechanical brake actuator according to the present invention;
Fig. 5 is an application view of a parking lock mechanism for an electromechanical brake actuator according to the present invention.
Wherein: 1. a motor housing; 2. a locking plate; 3. a drive shaft; 4. a transmission gear; 5. a motor cover; 6. a housing; 7. a first end magnet; 8. a connection terminal; 9. insulating encapsulation; 10. a positioning frame; 11. a sliding iron core; 12. a middle magnet; 13. a coil; 14. an end cap; 15. a second end magnet; 16. a locking head; 17. positioning the bulge; 18. an accommodating groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the detailed description and specific examples, while indicating the embodiment of the application, are intended for purposes of illustration only and are not intended to limit the scope of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 5, a parking lock mechanism for an electromechanical brake actuator includes an electromagnetic lock assembly provided in a motor housing 1 and a lock plate 2 fixed to a drive shaft 3 of a drive motor, the lock plate 2 being provided with a plurality of lock holes uniformly distributed in a circumference; the electromagnetic locking assembly comprises an electromagnetic driving telescopic component and a locking head 16 connected with the output end of the electromagnetic driving telescopic component, and the locking head 16 stretches into the locking hole. The locking disc 2 and the driving shaft 3 in the embodiment are in interference fit or key connection, and the driving shaft 3 in the embodiment is fixedly provided with a transmission gear 4 for outputting braking force to a brake.
The electromagnetic locking assembly comprises a shell 6, a first end magnet 7, a second end magnet 15 and a bistable electromagnet, wherein the first end magnet 7 and the second end magnet 15 are respectively fixed at two ends of the shell 6, the bistable electromagnet is arranged in the shell 6 in a sliding manner, the bistable electromagnet is connected with one end of a locking head 16, and the other end of the locking head 16 penetrates out of the shell 6 through the first end magnet 7; the bistable electromagnet is arranged coaxially with the locking head 16.
The bistable electromagnet comprises a sliding iron core 11, a positioning frame 10 arranged on the outer circumference side of the sliding iron core 11 and a coil 13 wound on the positioning frame 10; a moving gap is reserved between the sliding iron core 11 and the positioning frame 10, and the positioning frame 10 is fixed inside the shell 6.
At least one section of coil 13 is axially wound on the positioning frame 10; each section of coil 13 is electrically connected with a power supply through a control circuit board, the control circuit board is welded at the top end of the electromagnetic locking component, in the embodiment, the electromagnetic locking component is electrically connected with the control circuit board through a connecting terminal 8, and an insulating rubber coating 9 is arranged outside the connecting terminal 8; the control circuit board is integrated with a current sensor for detecting the electrified current of each section of coil 13, a magnetic field intensity sensor for detecting the magnetic field intensity generated by the sliding iron core 11, a direct current power supply and a switch power tube, wherein the current sensor and the magnetic field intensity sensor are connected with the input end of the switch power tube through a logic control circuit, the output end of the switch power tube is respectively and electrically connected with each section of coil 13, the current of the coil 13 is conveniently detected by the current sensor, the magnetic field intensity sensor detects the magnetic field intensity generated by the sliding magnetic core, and the detection result is fed back to the logic control circuit so as to realize the accurate control of the magnetic field.
The control circuit board of the present embodiment is fixed to the motor cover 5.
It should be noted that the above electronic components are all mature products in the market, only the electronic components are needed to be purchased and then connected according to the specification, the electronic components are not improved, and the principle of adjusting the magnitude and direction of the current flowing into the coil 13 by using the switching power tube according to the collected current value of the current sensor is common knowledge in the art, so that the circuit structure and principle thereof are not repeated herein.
The locating rack 10 is the king font, and the intermediate position of locating rack 10 is fixed with intermediate magnet 12, and twines respectively on the locating rack 10 of intermediate magnet 12 upper and lower both sides and have top coil and bottom coil, and top coil and bottom coil all are through control circuit board and power electric connection.
An intermediate magnet 12 is fixed between the positioning frame 10 and the shell 6, and the intermediate magnet 12 is positioned between the first end electromagnet and the second end electromagnet; the first end magnet 7, the second end magnet 15 and the intermediate magnet 12 are all permanent magnets, and the permanent magnets can attract the sliding iron core 11 when the sliding iron core 11 stops running, so that the sliding iron core 11 cannot generate displacement due to vibration when a vehicle runs, the magnetic field directions of the first end magnet 7 and the intermediate magnet 12 are opposite, and the magnetic field directions of the intermediate magnet 12 and the second end magnet 15 are the same.
The housing 6 includes a main body and an end cover 14 fixed at one end of the main body, the main body and the end cover 14 are made of aluminum alloy, other alloys or metal materials can be selected in this embodiment, heat dissipation is improved by utilizing good heat conductivity of metal, and the end cover 14 is provided with a locking head 16 in a penetrating manner.
The electromagnetic locking assembly is arranged in the motor casing 1, a containing groove 18 for containing the electromagnetic locking assembly is formed in the motor casing 1, a positioning groove is formed in the inner wall of the containing groove 18 and faces the position of the electromagnetic locking assembly, positioning protrusions 17 clamped into the positioning grooves are fixed on the outer wall of the casing 6 of the electromagnetic locking assembly, two positioning protrusions 17 are fixed on the end cover 14 of the casing 6 of the embodiment and are symmetrically positioned, and correspondingly, two positioning grooves are formed in the containing groove 18, so that the electromagnetic locking assembly rotates and the connecting terminal 8 of the electromagnetic locking assembly is protected, wherein the electromagnetic locking assembly is caused by vehicle vibration and the like; heat dissipation silicone grease is filled between the motor casing 1 and the casing 6, heat generated by the electromagnetic locking assembly can be radiated to the heat dissipation silicone grease outwards through the casing 6, and then the motor casing 1 is utilized for heat dissipation, so that the heat dissipation area is enlarged, and the heat conductivity is improved. Meanwhile, the motor casing 1 is made of aluminum alloy, reinforcing ribs or fin-shaped protrusions for increasing the heat radiating area are fixed on the outer wall of the motor casing 1, and the heat radiating effect is improved by improving the heat radiating area on the premise of not obviously increasing the volume.
The method for operating the parking lock mechanism for the electromechanical brake actuator includes a brake lock-up process and a brake release process:
Firstly, the initial position of the sliding iron core 11 is located at a position sucked with one end of the first end magnet 7 extending into the housing 6;
the braking locking process comprises the following steps:
Firstly, starting a brake to generate braking force until the braking force reaches a set value; at this time, the coil 13 is energized, the sliding iron core 11 generates a magnetic field according to the electromagnetic induction principle, the magnetic field direction of the sliding iron core 11 is the same as the magnetic field direction of the second end magnet 15, meanwhile, the magnetic field direction of the sliding iron core 11 is opposite to the magnetic field direction of the intermediate magnet 12, the sliding iron core 11 moves from the second end magnet 15 towards the direction of the intermediate magnet 12 until the intermediate position of the sliding iron core 11 passes through the intermediate magnet 12, the magnetic field direction of the sliding iron core 11 is the same as the magnetic field direction of the intermediate magnet 12, meanwhile, the magnetic field direction of the sliding iron core 11 is opposite to the magnetic field direction of the first end magnet 7, the sliding iron core 11 moves from the intermediate magnet 12 towards the direction of the first end magnet 7 until the sliding iron core 11 attracts the first end magnet 7, and the sliding iron core 11 drives the locking head 16 to be inserted into the locking hole on the locking disc 2;
The brake release process comprises the following steps:
First, the brake is released, the coil 13 is electrified reversely, the sliding iron core 11 generates an opposite magnetic field according to the electromagnetic induction principle, at this time, the magnetic field direction of the sliding iron core 11 is the same as the magnetic field direction of the first end magnet 7, meanwhile, the magnetic field direction of the sliding iron core 11 is opposite to the magnetic field direction of the intermediate magnet 12, the sliding iron core 11 moves from the second end magnet 15 towards the direction of the intermediate magnet 12 until the intermediate position of the sliding iron core 11 passes through the intermediate magnet 12, the magnetic field direction of the sliding iron core 11 is the same as the magnetic field direction of the intermediate magnet 12, meanwhile, the magnetic field direction of the sliding iron core 11 is opposite to the magnetic field direction of the second end magnet 15, the sliding iron core 11 moves from the intermediate magnet 12 towards the direction of the second end magnet 15 until the sliding iron core 11 and the second end magnet 15 attract each other, the sliding iron core 11 drives the locking head 16 to be pulled out from the locking hole on the locking disc 2, and locking is released.
In the above-described process, when the sliding iron core 11 is moved from the first end magnet 7 toward the second end magnet 15, the current of the coil 13 closer to the sliding iron core 11 increases, and the coil 13 farther from the position of the sliding iron core 11 decreases, so that the position of the sliding iron core 11 is determined by the current change, and stroke control is achieved.
Therefore, the parking locking mechanism for the electromechanical brake actuator and the working method are adopted, the electromagnetic locking assembly is matched with the locking disc fixed on the driving gear shaft to lock, and the driving gear torque is low, so that the impact on the locking head is small, and the service life of the mechanism can be prolonged.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (9)
1. A parking lock mechanism for an electromechanical brake actuator, characterized by: the electromagnetic locking assembly is arranged in the motor shell, and the locking disc is fixed on a driving shaft of the driving motor and provided with a plurality of locking holes uniformly distributed in the circumference;
The electromagnetic locking assembly comprises an electromagnetic driving telescopic component and a locking head connected with the output end of the electromagnetic driving telescopic component, and the locking head stretches into the locking hole;
The electromagnetic locking assembly comprises a shell, a first end magnet, a second end magnet and a bistable electromagnet, wherein the first end magnet and the second end magnet are respectively fixed at two ends of the shell, the bistable electromagnet is arranged in the shell in a sliding manner, the bistable electromagnet is connected with one end of a locking head, and the other end of the locking head penetrates out of the shell through the first end magnet;
The bistable electromagnet and the locking head are coaxially arranged.
2. The parking lock mechanism for an electromechanical brake actuator according to claim 1, wherein: the bistable electromagnet comprises a sliding iron core, a locating rack arranged on the outer circumference side of the sliding iron core and a coil wound on the locating rack;
A moving gap is reserved between the sliding iron core and the locating rack, and the locating rack is fixed in the shell.
3. The parking lock mechanism for an electromechanical brake actuator according to claim 2, wherein: an intermediate magnet is fixed between the positioning frame and the shell, and the intermediate magnet is positioned between the first end electromagnet and the second end electromagnet;
The first end magnet, the second end magnet and the middle magnet are all permanent magnets, the magnetic field directions of the first end magnet and the middle magnet are opposite, and the magnetic field directions of the middle magnet and the second end magnet are the same.
4. The parking lock mechanism for an electromechanical brake actuator according to claim 3, wherein: the casing includes the main part and is fixed in the end cover of main part one end, and main part and end cover are the aluminum alloy material, and wear to be equipped with the locking head on the end cover.
5. The parking lock mechanism for an electromechanical brake actuator according to claim 1, wherein: at least one section of coil is axially wound on the positioning frame;
Each section of coil is electrically connected with a power supply through a control circuit board, and the control circuit board is welded at the top end of the electromagnetic locking assembly;
the control circuit board is integrated with a current sensor for detecting the electrified current of each section of coil, a magnetic field intensity sensor for detecting the magnetic field intensity generated by the sliding iron core, a direct current power supply and a switching power tube, wherein the current sensor and the magnetic field intensity sensor are connected with the input end of the switching power tube through a logic control circuit, and the output end of the switching power tube is respectively and electrically connected with each section of coil.
6. The parking lock mechanism for an electromechanical brake actuator according to claim 5, wherein: the locating rack is the king font, and the intermediate position of locating rack is fixed with middle magnet, and twines respectively on the locating rack of both sides about the middle magnet top coil and bottom coil, top coil and bottom coil all pass through control circuit board and power electric connection.
7. The parking lock mechanism for an electromechanical brake actuator according to claim 6, wherein: the electromagnetic locking assembly is arranged in the motor casing, a containing groove for containing the electromagnetic locking assembly is formed in the motor casing, a positioning groove is formed in the inner wall of the containing groove and faces the position of the electromagnetic locking assembly, and a positioning protrusion clamped into the positioning groove is fixed on the outer wall of the shell of the electromagnetic locking assembly;
Heat dissipation silicone grease is filled between the motor shell and the shell.
8. The parking lock mechanism for an electromechanical brake actuator according to claim 7, wherein: the motor casing is aluminum alloy material, is fixed with the strengthening rib or the fin form arch that are used for increasing radiating area on the outer wall of motor casing.
9. The method for operating a parking lock mechanism for an electromechanical brake actuator according to any one of the preceding claims 1 to 8, wherein: comprises a brake locking process and a brake releasing process:
the braking locking process comprises the following steps:
firstly, starting a brake to generate braking force until the braking force reaches a set value; the coil is electrified, a magnetic field is generated by the sliding iron core according to an electromagnetic induction principle, the magnetic field direction of the sliding iron core is the same as that of the second end magnet, meanwhile, the magnetic field direction of the sliding iron core is opposite to that of the middle magnet, the sliding iron core moves from the second end magnet towards the middle magnet until the middle position of the sliding iron core passes through the middle magnet, the magnetic field direction of the sliding iron core is the same as that of the middle magnet, meanwhile, the magnetic field direction of the sliding iron core is opposite to that of the first end magnet, the sliding iron core moves from the middle magnet towards the first end magnet until the sliding iron core is attracted with the first end magnet, and the sliding iron core drives the locking head to be inserted into the locking hole on the locking disc;
The brake release process comprises the following steps:
The brake is released, the coil is electrified reversely, the sliding iron core generates an opposite magnetic field according to the electromagnetic induction principle, the magnetic field direction of the sliding iron core is the same as that of the first end magnet, meanwhile, the magnetic field direction of the sliding iron core is opposite to that of the middle magnet, the sliding iron core moves from the second end magnet towards the middle magnet until the middle position of the sliding iron core passes through the middle magnet, the magnetic field direction of the sliding iron core is the same as that of the middle magnet, meanwhile, the sliding iron core moves from the middle magnet towards the second end magnet until the sliding iron core is attracted by the second end magnet, the sliding iron core drives the locking head to be pulled out from the locking hole on the locking disc, and locking is released.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410306688.XA CN117905881B (en) | 2024-03-18 | 2024-03-18 | Parking locking mechanism for electromechanical brake actuator and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410306688.XA CN117905881B (en) | 2024-03-18 | 2024-03-18 | Parking locking mechanism for electromechanical brake actuator and working method |
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| CN117905881A true CN117905881A (en) | 2024-04-19 |
| CN117905881B CN117905881B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410306688.XA Active CN117905881B (en) | 2024-03-18 | 2024-03-18 | Parking locking mechanism for electromechanical brake actuator and working method |
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| CN116424292A (en) * | 2023-05-31 | 2023-07-14 | 上海汇众汽车制造有限公司 | Parking brake device for electromechanical brake system |
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| CN117578796A (en) * | 2024-01-16 | 2024-02-20 | 格陆博科技有限公司 | Electronic control execution unit of brake-by-wire system and application thereof |
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2024
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| CN106143462A (en) * | 2015-03-31 | 2016-11-23 | 河南超微电动汽车有限公司 | Electromagnetism halting mechanism |
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| CN116424292A (en) * | 2023-05-31 | 2023-07-14 | 上海汇众汽车制造有限公司 | Parking brake device for electromechanical brake system |
| CN117267280A (en) * | 2023-10-26 | 2023-12-22 | 罗伯特·博世有限公司 | Electromechanical brake |
| CN117578796A (en) * | 2024-01-16 | 2024-02-20 | 格陆博科技有限公司 | Electronic control execution unit of brake-by-wire system and application thereof |
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| CN117905881B (en) | 2024-05-28 |
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Inventor after: Liu Zhaoyong Inventor after: Zhang Qian Inventor before: Liu Zhaoyong Inventor before: Dong Zuomin Inventor before: Peng Hui Inventor before: Luo Yaobing |