CN214063623U - Electromagnetic brake and vehicle - Google Patents
Electromagnetic brake and vehicle Download PDFInfo
- Publication number
- CN214063623U CN214063623U CN202022406637.4U CN202022406637U CN214063623U CN 214063623 U CN214063623 U CN 214063623U CN 202022406637 U CN202022406637 U CN 202022406637U CN 214063623 U CN214063623 U CN 214063623U
- Authority
- CN
- China
- Prior art keywords
- brake
- coil
- armature
- electromagnetic
- braking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005284 excitation Effects 0.000 claims abstract description 46
- 230000000712 assembly Effects 0.000 claims abstract description 17
- 238000000429 assembly Methods 0.000 claims abstract description 17
- 239000004020 conductor Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
- F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
- F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The utility model provides an electromagnetic brake and a vehicle, the electromagnetic brake comprises a brake disc and a brake structure, the brake disc is used for connecting with a wheel, and the brake structure is rotatably arranged in the brake disc; the brake structure comprises a coil base, at least two excitation coils and at least two brake assemblies, wherein the excitation coils and the brake assemblies are arranged in a one-to-one correspondence manner, each excitation coil is wound in the coil base, and the brake assemblies are hinged with the coil base; the brake assembly can rotate to a release state and a brake state relative to the coil holder, when the brake assembly is in the release state, the excitation coil is electrified, and the brake assembly is attracted with the coil holder; when the brake assembly is in a brake state, the excitation coil is powered off, and the brake assembly is abutted to the inner side wall of the brake disc. The utility model provides an electromagnetic brake is equipped with two sets at least independent braking system, and the security that the vehicle went is higher.
Description
Technical Field
The utility model relates to a brake field especially relates to an electromagnetic brake ware and vehicle.
Background
The brake is a mechanical braking device capable of reducing the speed of the vehicle, and can also be called a brake.
The existing brake can adopt a hydraulic brake device to provide braking force. When the brake pedal is stepped on, the piston of the brake master pump is pushed to move inwards by the aid of the braking force of the pedal, pressure of the braking fluid in the brake master pump is increased, the braking fluid enters the brake slave pumps of the wheels through the oil pipes, the pistons of the brake slave pumps are pushed to move outwards, transmission of the braking force of the pedal to the brakes of the wheels is achieved, and the brakes of the wheels are pushed to brake. When the brake pedal is released, the master cylinder piston returns under the action of oil pressure and a return spring, and then the wheel brake and the wheel cylinder piston return to release the brake on the wheel.
However, the hydraulic brake device has a complicated structure, and brake fluid is easily leaked to cause the hydraulic brake device to fail, thereby causing a potential safety hazard in the driving of the vehicle.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electromagnetic brake ware and vehicle, simple structure is equipped with two sets of independent braking systems, and the security that the vehicle travel is higher.
In a first aspect, the utility model provides an electromagnetic brake, which comprises a brake disc and a braking structure, wherein the brake disc is used for being connected with a wheel, the brake disc is arranged in the brake disc, and the braking structure is rotatably arranged in the brake disc;
the brake structure comprises a coil base, at least two excitation coils and at least two brake assemblies, wherein the excitation coils and the brake assemblies are arranged in a one-to-one correspondence manner, each excitation coil is wound in the coil base, and the brake assemblies are hinged with the coil base;
the brake assembly can rotate to a release state and a brake state relative to the coil holder, the excitation coil is electrified, the brake assembly is attracted with the coil holder, and the brake assembly is in the release state; the excitation coil is powered off in the braking state, the brake assembly is abutted to the inner side wall of the brake disc, and the brake assembly is in the braking state.
Optionally, in the electromagnetic brake provided by the present invention, the brake assembly includes an armature, a brake shoe and an elastic member, the armature is hinged to the coil base, the elastic member is located on the coil base and abuts against the armature, and when the brake assembly is in a braking state, the elastic member extends to enable the brake shoe to abut against the inner side wall of the brake disc;
when the brake assembly is in a release state, the brake shoe moves towards the elastic piece so that the armature compresses the elastic piece until the armature is attracted with the coil base.
Optionally, the utility model provides an electromagnetic brake, coil holder have first holding tank, and the first notch of first holding tank is towards armature, and the first end rigid coupling of elastic component is in first holding tank, and the second end of elastic component is towards first notch, and with the armature butt.
Optionally, in the electromagnetic brake provided by the present invention, at least two sides of the coil base are respectively provided with at least two second accommodating grooves arranged at intervals, a second notch of the second accommodating groove faces the armature, a connecting portion is formed between two adjacent second accommodating grooves at the same side of the coil base, and the excitation coil is respectively wound on the connecting portion through the adjacent second accommodating grooves;
when the brake assembly is in a release state, the armature is abutted against the side face of the coil seat so as to close the second notch.
Optionally, in the electromagnetic brake provided by the present invention, one end of the coil base has at least two notches, the notches are fixedly connected with the connecting blocks, and part of the connecting blocks extend to the outside of the coil base and are hinged to the armature through the pin; and/or the connecting part is vertical to the bottom wall of the second accommodating groove, the distance between the connecting part and the inner wall opposite to the second accommodating groove is equal, and the at least two braking components are symmetrically arranged; and/or, also include the spindle, the coil base is fitted over the spindle; and/or the coil holder is a magnetic conductor holder.
Optionally, the utility model provides an electromagnetic brake still includes the regulating part, and armature and brake shoe pass through the regulating part and connect, and the regulating part is used for adjusting the clearance between armature and the brake shoe.
Optionally, in the electromagnetic brake provided by the present invention, the adjusting member is an adjusting bolt, the armature has a first bolt hole, the brake shoe has a second bolt hole opposite to the first bolt hole, and two ends of the adjusting member are respectively inserted into the first bolt hole and the second bolt hole;
the first bolt hole is communicated with the second accommodating groove.
Optionally, in the electromagnetic brake provided by the present invention, the brake shoe is covered with a friction plate, the friction plate is fixedly connected with the brake shoe, and when the brake assembly is in a braking state, the friction plate abuts against the inner side wall of the brake disc;
the inner side wall of the brake disc is arc-shaped, the brake shoe is matched with the inner side wall of the brake disc, the curvature radius of the friction plate is equal to that of the brake disc, and the curvature radius of the brake shoe is equal to that of the friction plate.
Optionally, the electromagnetic brake provided by the utility model further comprises a manual release structure, the manual release structure comprises a handle, a roller and a connecting rope, the handle is connected with the roller, the roller is rotatably connected with the coil base, and the connecting rope is connected with the brake assembly;
the handle can drive the roller winding coil seat to rotate, and when the brake assembly is in a brake state, the brake assembly is driven to be separated from the brake disc through the connecting rope, so that the brake assembly is switched to a release state.
In a second aspect, the present invention also provides a vehicle, which comprises a vehicle body and the above electromagnetic brake arranged on the vehicle body.
The utility model provides an electromagnetic brake ware and vehicle, electromagnetic brake ware are through setting up the braking structure, and the braking structure sets up two at least excitation coils and two at least braking components, and an excitation coil corresponds a braking component, and when excitation coil circular telegram, produce stronger electromagnetism suction, make excitation coil and rather than the braking component actuation that corresponds, the vehicle is in the release state. When the exciting coil is powered off, the brake assembly can rotate relative to the coil seat and is directly contacted with the inner side wall of the brake disc, so that the vehicle is in a braking state. At least two sets of independent and mutually unaffected brake systems of the vehicle improve the driving safety of the vehicle.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic overall structural diagram of an electromagnetic brake provided in an embodiment of the present invention;
fig. 2 is an exploded view of a first electromagnetic brake provided in an embodiment of the present invention;
fig. 3 is a first front view of the electromagnetic brake provided by the embodiment of the present invention;
fig. 4 is a schematic view of an internal structure of an electromagnetic brake according to an embodiment of the present invention;
FIG. 5 is a schematic view of the coil base of FIG. 3;
fig. 6 is a schematic structural view of the armature of fig. 3;
FIG. 7 is a schematic structural view of the brake shoe of FIG. 3;
fig. 8 is a schematic structural diagram of the electromagnetic brake provided in the embodiment of the present invention in a braking state;
fig. 9 is an exploded view of a second electromagnetic brake provided in an embodiment of the present invention;
fig. 10 is a second front view of the electromagnetic brake according to the embodiment of the present invention;
fig. 11 is a schematic view of an internal structure of an electromagnetic brake according to an embodiment of the present invention.
Description of reference numerals:
100-electromagnetic brake; 110-a braking structure; 111-a coil holder; 1111-a second accommodating groove; 1112-a first receiving tank; 1113-connecting part; 1114-a gap; 1115-connecting holes; 1116-a channel; 1117-mounting hole; 112-a field coil; 113-a brake assembly; 1131 — armature; 11311 — first bolt hole; 1132 — brake shoes; 11321 — second bolt hole; 1133 — an elastic member; 1134, a pin shaft; 1135, friction plate; 114-connecting block; 120-brake disc; 130-an adjustment member; 140-a rotating shaft; 150-manual release configuration; 151-a handle; 152-a roller; 1521-a ring channel; 153-connecting ropes; 154-an adjustment assembly; 1541-adjusting screws; 1542-an elastomer; 1543-sphere;
a-width direction.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection through an intermediary, a connection between two elements, or an interactive relationship between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The existing brake can adopt a hydraulic brake device to provide braking force. When the brake pedal is stepped on, the piston of the brake master pump is pushed to move inwards by the aid of the braking force of the pedal, pressure of the braking fluid in the brake master pump is increased, the braking fluid enters the brake slave pumps of the wheels through the oil pipes, the pistons of the brake slave pumps are pushed to move outwards, transmission of the braking force of the pedal to the brakes of the wheels is achieved, and the brakes of the wheels are pushed to brake. When the brake pedal is released, the master cylinder piston returns under the action of oil pressure and a return spring, and then the wheel brake and the wheel cylinder piston return to release the brake on the wheel. However, the hydraulic brake device has a complicated structure, and brake fluid is easily leaked to cause the hydraulic brake device to fail, thereby causing a potential safety hazard in the driving of the vehicle.
The utility model provides an electromagnetic brake, simple structure is equipped with two sets of independent braking system, and the security that the vehicle went is higher.
The present invention will be described with reference to the accompanying drawings and specific embodiments. Fig. 1 is a schematic overall structural diagram of an electromagnetic brake provided in an embodiment of the present invention; fig. 2 is an exploded view of a first electromagnetic brake provided in an embodiment of the present invention; fig. 3 is a front view of an electromagnetic brake provided in an embodiment of the present invention; fig. 4 is a schematic view of an internal structure of an electromagnetic brake according to an embodiment of the present invention; fig. 8 is a schematic structural diagram of the electromagnetic brake provided in the embodiment of the present invention in the braking state. Referring to fig. 1 to 4 and 8, the present invention provides an electromagnetic brake 100, which includes a brake disc 120 and a braking structure 110, wherein the brake disc 120 is used for being connected to a wheel, and the braking structure 110 is rotatably disposed in the brake disc 120.
The braking structure 110 includes a coil base 111, at least two excitation coils 112 and at least two braking assemblies 113, the excitation coils 112 and the braking assemblies 113 are arranged in a one-to-one correspondence, each excitation coil 112 is wound in the coil base 111, and the braking assemblies 113 are hinged to the coil base 111.
The brake assembly 113 can rotate relative to the coil holder 111 to a release state and a brake state, the excitation coil 112 is electrified in the release state, the brake assembly 113 is attracted with the coil holder 111, and the brake assembly is in the release state; the exciting coil 112 is powered off in the braking state, the brake assembly 113 abuts against the inner side wall of the brake disc 120, and the brake assembly 113 is in the braking state.
The electromagnetic brake 100 provided by the embodiment can be applied to a vehicle, a robot and other apparatuses which need to be provided with a brake component. For convenience of description, the present embodiment is explained in the case where the electromagnetic brake 100 is applied to a vehicle.
The electromagnetic brake 100 may include a brake disc 120 and a braking structure 110, wherein the brake disc 120 is used for supporting the braking structure 110. The brake disc 120 provides a space for accommodating the braking structure 110, and the braking structure 110 is disposed in the brake disc 120. Specifically, the brake disc 120 may be in a shape of a circular tube, and the braking structure 110 is located at an inner ring of the brake disc 120, and the inner ring of the brake disc 120 forms an inner sidewall of the brake disc 120.
The electromagnetic brake 100 further includes a rotating shaft 140, the coil base 111 is sleeved on the rotating shaft 140, and the driving force of the vehicle is transmitted to the braking structure 110 through the rotating shaft 140, so as to drive the braking structure 110 to rotate smoothly.
Specifically, the braking structure 110 may include a coil base 111, an excitation coil 112 and braking assemblies 113, the number of the excitation coil 112 and the braking assemblies 113 may be two or more, and one excitation coil 112 corresponds to one braking assembly 113. The number of the exciting coil 112 and the braking assembly 113 is not limited in the present embodiment, and the number of the exciting coil 112 and the braking assembly 113 is two in the present embodiment as an example.
In a specific implementation, two opposite sides of the coil base 111 are respectively provided with an excitation coil 112, and correspondingly, one excitation coil 112 corresponds to one brake assembly 113. As shown in fig. 3 and 4, when the excitation coil 112 is energized, the coil holder 111 and the brake assembly 113 form a closed-loop magnetic circuit, the brake assembly 113 and the coil holder 111 corresponding to the brake assembly 113 are attracted by the electromagnetic attraction force, the brake assembly 113 is in a released state, the electromagnetic brake is in a released state, and at this time, the wheel of the vehicle can normally rotate. As shown in fig. 8, when the exciting coil 112 is de-energized, the magnetic field formed by the coil base 111 and the brake assembly 113 disappears, the brake assembly 113 can rotate relative to the coil base 111 until the brake assembly 113 abuts against the inner side wall of the brake disc 120 (i.e. the brake assembly 113 contacts with the inner side wall of the brake disc 120), the brake assembly 113 is in a braking state, the brake assembly 113 forms a braking friction force with the inner side wall of the brake disc 120, the electromagnetic brake 100 is in a braking state, and the wheel rotation speed of the vehicle is reduced until the rotation is stopped.
The utility model provides an electromagnetic brake ware 100, through setting up braking structure 110, braking structure 110 sets up two at least excitation coil 112 and two at least brake assembly 113, and an excitation coil 112 corresponds a brake assembly 113, and when excitation coil 112 circular telegram, produce stronger electromagnetism suction, make excitation coil 112 and the 113 actuation of brake assembly rather than corresponding, the vehicle is in the release state. When the exciting coil 112 is de-energized, the brake assembly 113 can rotate relative to the coil base 111 until it contacts the inner side wall of the brake disc 120, so that the vehicle is in a braking state. At least two sets of independent and mutually unaffected brake systems of the vehicle improve the driving safety of the vehicle.
As an alternative embodiment, as shown in fig. 4, in the electromagnetic brake 100 provided in this embodiment, the brake assembly 113 may include an armature 1131, a brake shoe 1132 and an elastic member 1133, the armature 1131 is hinged to the coil base 111, the elastic member 1133 is located on the coil base 111 and abuts against the armature 1131, and when the brake assembly 113 is in the braking state, the elastic member 1133 is extended to make the brake shoe 1132 abut against an inner side wall of the brake disc 120; when the brake assembly 113 is in the released state, the brake shoe 1132 moves toward the elastic member 1133, so that the armature 1131 compresses the elastic member 1133 until the armature 1131 engages with the coil holder 111.
The armature 1131 may be made of a magnetic conductive metal material, such as an electrical pure iron, 10# steel, carbon steel, silicon steel sheet, and other metal materials with good magnetic conductivity; the brake shoes 1132 may be made of cast iron, cast aluminum, carbon steel, or the like; the elastic member 1133 may be a spring, an elastic sleeve, or other elastic members. The coil base 111 may be made of a magnetic conductive metal material, such as an electrical pure iron, 10# steel, silicon steel sheet, and other metal materials with good magnetic conductivity, and the coil base 111 may also be made of silicon steel sheets by laminating.
As shown in fig. 3 and 4, when the excitation coil 112 is energized, the coil holder 111 and the armature 1131 form a closed-loop magnetic circuit, and due to the electromagnetic attraction, the brake shoe 1132 moves toward the elastic member 1133, so that the armature 1131 compresses the elastic member 1133, until the armature 1131 and the coil holder 111 corresponding to the armature 1131 are attracted, the brake assembly 113 is in a released state, and the electromagnetic brake is in a released state, at which time, the wheel of the vehicle can normally rotate. As shown in fig. 8, when the exciting coil 112 is de-energized, the magnetic field formed by the coil base 111 and the armature 1131 disappears, and the elastic member 1133 stretches, so that the brake shoe 1132 is driven by the armature 1131 to rotate relative to the coil base 111 until the brake shoe 1132 contacts with the inner side wall of the brake disc 120, the brake assembly 113 is in a braking state, and the brake assembly 113 forms a braking friction force with the inner side wall of the brake disc 120, so that the electromagnetic brake 100 is in the braking state, and the wheel rotation speed of the vehicle is reduced until the rotation is stopped.
Fig. 5 is a schematic structural view of the coil seat in fig. 3. Referring to fig. 4 and fig. 5, in the electromagnetic brake 100 provided in this embodiment, the coil base 111 has a first receiving groove 1112, a first notch of the first receiving groove 1112 faces the armature 1131, a first end of the elastic element 1133 is fixed in the first receiving groove 1112, and a second end of the elastic element 1133 faces the first notch and abuts against the armature 1131.
The first receiving groove 1112 is used for providing a receiving space for the elastic element 1133, and making the structure of the electromagnetic brake 100 more compact. Specifically, the outer sidewall of the elastic element 1133 can abut against the inner sidewall of the first receiving groove 1112, and the first receiving groove 1112 provides a guide for the extension and retraction of the elastic element 1133, so as to prevent the elastic element 1133 from bending during the extension and retraction process.
In some embodiments, at least two second receiving grooves 1111 are formed on at least two sides of the coil holder 111, a second notch of the second receiving groove 1111 faces the armature 1131, a connecting portion 1113 is formed between two adjacent second receiving grooves 1111 on the same side of the coil holder 111, the excitation coil 112 is wound on the connecting portion 1113 through the adjacent second receiving grooves 1111, and when the brake assembly 113 is in a released state, the armature 1131 abuts against a side surface of the coil holder 111 and closes the second notch.
The number of the second receiving grooves 1111 on one side of the coil base 111 may be two or more, and for example, the number of the second receiving grooves 1111 on the same side of the coil base 111 is two in this embodiment.
In a specific implementation, the second receiving grooves 1111 may extend toward two opposite sides of the coil base 111 and communicate with two opposite sides of the coil base 111, so that the excitation coil 112 is wound around the connection portion 1113 through the adjacent second receiving grooves 1111, and the connection portion 1113 provides a supporting function for the excitation coil 112, thereby facilitating the installation of the excitation coil 112.
When the brake assembly 113 is in the released state, the armature 1131 abuts against the side surface of the coil holder 111 to close the second notch, thereby allowing the coil holder 111 and the armature 1131 to form a closed-loop magnetic circuit when the excitation coil 112 is energized, generating an electromagnetic attraction force.
In some embodiments, the first receiving groove 1112 is located on the connecting portion 1113, that is, the first receiving groove 1112 is located between two adjacent second receiving grooves 1111, so that the elastic member 1133 located in the first receiving groove 1112 applies a force to the middle position of the armature 1131, so that the armature 1131 can rotate smoothly.
Optionally, the connecting portion 1113 is perpendicular to the bottom of the second receiving groove 1111, and the distance between the inner walls of the second receiving groove 1111 is equal to the distance between the inner walls of the second receiving groove 1111, and the second receiving groove 1111 is adjacent to the side wall of the coil base 111 in the width direction a, so that the coil base 111 is in an E shape. At least two brake assemblies 113 are symmetrically arranged, so that the structure of the electromagnetic brake 100 with the coil bases 111 in a back-to-back double-E shape is compact.
With continued reference to fig. 4 and fig. 5, in order to facilitate the installation of the armature 1131 on the coil holder 111, in the electromagnetic brake 100 provided in this embodiment, one end of the coil holder 111 has at least two notches 1114, the notches 1114 are fixedly connected with the connecting blocks 114, and a portion of the connecting blocks 114 extends to the outside of the coil holder 111 and is hinged to the armature 1131 through the pin 1134.
Specifically, the connecting block 114 may be fixed in the notch 1114 by using a clamping, welding, or bolting, which is not limited in this embodiment.
In specific implementation, the connecting block 114 extends to the outer side of the coil base 111, the connecting block 114 is provided with a mounting hole, the mounting hole is arranged at the extending end of the connecting block 114, the pin 1134 is located in the mounting hole, the mounting hole at the extending end of the connecting block 114 provides a containing space for the pin 1134, and the armature 1131 is hinged to the coil base 111 at the mounting hole through the pin 1134, so that the armature 1131 can rotate around the pin 1134, and the electromagnetic brake 100 can be released and braked.
With continued reference to fig. 4, in an alternative manner, the electromagnetic brake 100 provided in this embodiment further includes an adjusting member 130, the armature 1131 and the brake shoe 1132 are connected through the adjusting member 130, and the adjusting member 130 is used for adjusting a gap between the armature 1131 and the brake shoe 1132.
Because of machining errors, the brake shoe 1132 may abut against the inner side wall of the brake disc 120 on the brake disc 120 during installation, and therefore the adjusting member 130 is required to adjust the gap between the armature 1131 and the brake shoe 1132, thereby ensuring that there is a gap between the armature 1131 and the brake shoe 1132 in the released state.
Fig. 6 is a schematic structural view of the armature of fig. 3; fig. 7 is a schematic structural view of the brake shoe of fig. 3. In a specific implementation, as shown in fig. 4 to 7, the adjusting member 130 is an adjusting bolt, the armature 1131 has a first bolt hole 11311, the brake shoe 1132 has a second bolt hole 11321 opposite to the first bolt hole 11311, and two ends of the adjusting member 130 are respectively inserted into the first bolt hole 11311 and the second bolt hole 11321; the first bolt hole 11311 communicates with the second receiving groove 1111.
Specifically, the end of the adjuster bolt facing the armature 1131 is inserted into the first bolt hole 11311, and the end of the adjuster bolt facing the brake shoe 1132 is inserted into the second bolt hole 11321. Firstly, the adjusting bolt is screwed into the first bolt hole 11311 on the armature 1131, and then the adjusting bolt is inserted into the second bolt hole 11321 on the brake shoe 1132, when the brake shoe 1132 is abutted to the inner side wall of the brake disc 120 on the brake disc 120, the brake shoe 1132 is taken down, the length of the adjusting bolt screwed into the first bolt hole 11311 on the armature 1131 is adjusted, and the gap between the brake shoe 1132 and the inner side wall of the brake disc 120 can be adjusted adaptively. Therefore, by arranging the adjusting member 130 on the electromagnetic brake 100, the electromagnetic brake 100 is prevented from failing due to a gap between the brake shoe 1132 and the inner side wall of the brake disc 120 on the brake disc 120 when the electromagnetic brake 100 is in a braking state, or the brake shoe 1132 is prevented from contacting the inner side wall of the brake disc 120 on the brake disc 120 when the electromagnetic brake 100 is in a releasing state.
As shown in fig. 8, as an optional implementation manner, in the electromagnetic brake 100 provided in this embodiment, the brake shoe 1132 is covered with the friction plate 1135, the friction plate 1135 is fixedly connected to the brake shoe 1132, and when the brake assembly 113 is in the braking state, the friction plate 1135 abuts against the inner side wall of the brake disc 120.
Wherein the brake shoe 1132 is a wear member, thereby preventing the brake shoe 1132 from being worn. The friction plate 1135 is covered on the brake shoe 1132, the size of the friction plate 1135 can be larger than that of the brake shoe 1132, the size of the friction plate 1135 can also be smaller than that of the brake shoe 1132, or the size of the friction plate 1135 is equal to that of the brake shoe 1132, and the friction force generated by the contact of the friction plate 1135 and the inner side wall of the brake disc 120 meets the braking requirement, so that the embodiment is not limited herein.
The friction plate 1135 and the brake shoe 1132 are connected in a manner of being connected by a countersunk bolt, the friction plate 1135 is provided with a countersunk hole, the countersunk bolt is placed in the countersunk hole, and the friction plate 1135 and the brake shoe 1132 are connected, so that the connection is firm and the brake shoe 1132 is not easy to damage.
The friction plate 1135 and the brake shoe 1132 may be connected by bolts, the two side walls of the friction plate 1135 may be thin, the two sides of the friction plate 1135 may be connected by bolts, and the middle portion of the friction plate 1135 may contact the brake disc 120, so that the connection is firm and the processing is easy.
The connection mode of friction disc 1135 and brake shoe 1132 also can be for bonding, scribble glue on brake shoe 1132, and then bond friction disc 1135 and brake shoe 1132, from this, simple structure saves the cost.
The connection between the friction plate 1135 and the brake shoe 1132 may be any one of the above, and the embodiment is not limited herein.
When the brake assembly 113 is in a braking state, the friction plate 1135 abuts against the inner side wall of the brake disc 120, so that the braking friction force between the friction plate 1135 and the inner side wall of the brake disc 120 is increased, and the brake shoe 1132 is protected from being damaged.
When the electromagnetic brake 100 is in a braking state, the acting force of the elastic element 1133 pushes the armature 1131 to rotate outward relative to the coil seat 111, the elastic element 1133 is in an extended state, and then the armature 1131 drives the brake shoe 1132 and the friction plate 1135 to rotate outward, when the friction plate 1135 contacts with the inner side wall of the brake disc 120, the friction plate 1135 and the brake disc 120 generate a friction force, the friction force is a braking force for preventing the brake disc 120 from rotating, the direction of the braking force is the extending direction of the circumferential tangent of the inner side wall of the brake disc 120, and is opposite to the extending direction of the circumferential tangent of the rotating direction of the brake disc 120.
The force of the elastic member 1133 can be determined by the following formula (1):
F＝nkδ (1)
in formula (1), k is the elastic coefficient of the elastic member 1133, and has a unit of N/m; n is the number of elastic members 1133 of each set of independent braking system; delta is the expansion amount of the elastic element 1133 in the braking state of the electromagnetic brake 100, and the unit is m; f is the force of the elastic member 1133 in units of N.
Meanwhile, when the electromagnetic brake 100 is in a braking state, the friction plate 1135 and the inner sidewall of the brake disc 120 form a braking force, so as to form a braking torque.
The braking torque can be determined by the following equation (2):
T＝μFD (2)
in the formula (2), D is the radius of the inner ring of the brake disc 120, and the unit is m; μ is the coefficient of friction between the friction plate 1135 and the inner side wall of the brake disc 120; f is the force of the elastic member 1133 in units of N; t is braking torque in Nm.
With continued reference to fig. 8, in the electromagnetic brake 100 according to the present embodiment, the inner side wall of the brake disc 120 is arc-shaped, the brake shoe 1132 matches with the inner side wall of the brake disc 120, the radius of curvature of the friction plate 1135 is equal to the radius of curvature of the brake disc 120, and the radius of curvature of the brake shoe 1132 is equal to the radius of curvature of the friction plate 1135.
The brake shoe 1132 is matched with the inner side wall of the brake disc 120 through the friction plate 1135, the circle center of the friction plate 1135 is overlapped with the circle center of the brake disc 120, the curvature radius of the friction plate 1135 is equal to that of the brake disc 120, and the curvature radius of the brake shoe 1132 is equal to that of the friction plate 1135, so that when the electromagnetic brake 100 is in a braking state, the contact area between the friction plate 1135 and the inner side wall of the brake disc 120 is large, and the braking friction force is increased.
Fig. 9 is an exploded view of a second electromagnetic brake provided in an embodiment of the present invention; fig. 10 is a second front view of the electromagnetic brake according to the embodiment of the present invention; fig. 11 is a schematic view of an internal structure of an electromagnetic brake according to an embodiment of the present invention. Referring to fig. 9-11, in some embodiments, electromagnetic brake 100 further includes a manual release structure 150, where manual release structure 150 includes a handle 151, a roller 152, and a connecting cord 153, where handle 151 is connected to roller 152, roller 152 is rotatably connected to coil holder 111, and connecting cord 153 is connected to brake assembly 113.
The handle 151 can drive the roller 152 to rotate around the coil seat 111, and when the brake assembly 113 is in a braking state, the brake assembly 113 is driven to be separated from the brake disc through the connecting rope 153, so that the brake assembly 113 is switched to a releasing state.
In a specific implementation, the handle 151 may be located outside the coil holder 111, the coil holder 111 is provided with a connection hole 1115, the roller 152 is inserted into the connection hole 1115 and extends to the outside of the coil holder 111, an extension end of the roller 152 facing the outside of the coil holder 111 is fixedly connected to the handle 151, the roller 152 is provided with an annular groove 1521, the coil holder 111 is provided with a channel 1116 communicated with the connection hole 1115, an axis of the connection hole 1115 is perpendicular to an axis of the channel 1116, and two ends of the channel 1116 respectively face the opposite braking assemblies 113.
The connecting rope 153 may be a steel wire rope, a first end of the connecting rope 153 is connected to the brake assembly 113 on the first side of the channel 1116, the connecting rope 153 passes through the channel 1116 and is wound on the annular groove 1521, and a second end of the connecting rope 153 is connected to the brake assembly 113 on the second side of the channel 1116. When the brake assembly 113 is in a braking state, i.e. the friction plate 1135 abuts against the inner side wall of the brake disc 120, the handle 151 is rotated, the connecting rope 153 is wound around the annular groove 1521 of the roller 152, so that the inner side surface of the armature 1131 abuts against the opening end surface of the coil holder 111, the friction plate 1135 is separated from contact with the inner side wall of the brake disc 120, and the brake assembly 113 is in a releasing state.
In the application, the electromagnetic brake 100 can brake in an electromagnetic braking mode, and the electromagnetic brake 100 can also brake in a manual braking mode, so that traffic accidents caused by continuous running of the vehicle when the electromagnetic brake on the vehicle fails are avoided, and safe running of the vehicle is ensured.
In some embodiments, the channel 1116 may communicate with two opposite first receiving grooves 1112, and the channel 1116 extends in the same direction as the first receiving grooves 1112, and the connecting cord 153 passes through the elastic member 1133, thereby making the electromagnetic brake 100 compact.
Optionally, in the electromagnetic brake 100 provided in this embodiment, the coil base 111 has a mounting hole 1117 communicating with the connecting hole 1115, the manual release device 150 further includes an adjusting assembly 154 located in the mounting hole 1117, the adjusting structure 154 includes an adjusting screw 1541, an elastic body 1542 and a ball 1543, the elastic body 1542 is located between the adjusting screw 1541 and the ball 1543, the ball 1543 abuts against the connecting rope 153 on the annular groove 1521, the adjusting screw 1541 can be screwed out of the coil base 111, the adjusting screw 1541 is in threaded connection with the mounting hole 1117, and the adjusting screw 1541 is screwed into the coil base 111 to a length that the adjusting screw 1541 is screwed into the coil base 111, so that the elastic body 1542 pushes the ball 1543 to move toward the annular groove 1521 on the roller 152 after being pressed, so as to press the connecting rope 153, thereby achieving a fixed connection of the connecting rope and the roller 152.
The embodiment further provides a vehicle, which comprises a vehicle body and the electromagnetic brake 100 provided by any one of the above embodiments. It is understood that the vehicle may be an automobile, a mobile robot, etc.
The structure and the operation principle of the electromagnetic brake 100 are explained in the above embodiments, and are not described herein.
In this embodiment, the vehicle includes a vehicle body and an electromagnetic brake 100, the electromagnetic brake 100 is located on the vehicle body, a brake disc 120 is fixedly connected to a wheel, when the vehicle is running, the wheel drives the brake disc 120 to rotate, the braking structure 110 is stationary relative to the brake disc 120, and when the braking structure 110 abuts against the brake disc 120, the braking structure 110 slows down the rotation speed of the wheel through the brake disc 120, so that the vehicle is in a braking state, so as to slow down the vehicle.
The vehicle provided by the embodiment comprises a vehicle body and the electromagnetic brake, wherein the electromagnetic brake is matched with the brake disc 120 by arranging the brake structure 110, so that the electromagnetic brake 100 realizes two running states of release and braking, the structure is simple, and the cost can be saved. Meanwhile, at least two excitation coils 112 and at least two brake assemblies 113 are arranged through the brake structure 110, one excitation coil 112 corresponds to one brake assembly 113, and when the excitation coil 112 is electrified, a strong electromagnetic attraction force is generated, so that the excitation coil 112 and the brake assembly 113 corresponding to the excitation coil are attracted, and the vehicle is in a release state. When the exciting coil 112 is de-energized, the brake assembly 113 can rotate relative to the coil base 111 until it contacts the inner side wall of the brake disc 120, so that the vehicle is in a braking state. The vehicle is at least provided with two independent brake systems which do not influence each other, so that the running safety of the vehicle is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The electromagnetic brake is characterized by comprising a brake disc and a braking structure, wherein the brake disc is connected with a wheel, and the braking structure is rotatably arranged in the brake disc;
the brake structure comprises a coil base, at least two excitation coils and at least two brake assemblies, wherein the excitation coils and the brake assemblies are arranged in a one-to-one correspondence mode, each excitation coil is wound in the coil base, and the brake assemblies are hinged to the coil base;
the brake assembly can rotate to a release state and a brake state relative to the coil holder, the excitation coil is electrified, the brake assembly is attracted with the coil holder, and the brake assembly is in the release state; the brake state excitation coil outage, the brake subassembly with the inside wall butt of brake disc, the brake subassembly is in the brake state.
2. The electromagnetic brake of claim 1, wherein the brake assembly comprises an armature, a brake shoe, and an elastic member, the armature is hinged to the coil base, the elastic member is located on the coil base and abuts against the armature, and when the brake assembly is in a braking state, the elastic member is extended to make the brake shoe abut against an inner side wall of the brake disc;
when the brake assembly is in a release state, the brake shoe moves towards the elastic piece so that the armature compresses the elastic piece until the armature is attracted with the coil base.
3. The electromagnetic brake of claim 2, wherein the coil holder has a first receiving groove, a first notch of the first receiving groove faces the armature, a first end of the elastic member is fixed in the first receiving groove, and a second end of the elastic member faces the first notch and abuts against the armature.
4. The electromagnetic brake according to claim 3, wherein at least two sides of the coil holder are provided with at least two second receiving slots arranged at intervals, the second notches of the second receiving slots face the armature, a connecting portion is formed between two adjacent second receiving slots on the same side of the coil holder, and the excitation coil is wound on the connecting portion through the adjacent second receiving slots respectively;
when the brake assembly is in a release state, the armature is abutted against the side face of the coil base so as to close the second notch.
5. The electromagnetic brake of claim 4, wherein one end of the coil holder has at least two notches, a connecting block is fixedly connected in the notches, and part of the connecting block extends to the outer side of the coil holder and is hinged to the armature through a pin; and/or the connecting part is vertical to the bottom wall of the second accommodating groove, the distance between the connecting part and the inner wall opposite to the second accommodating groove is equal, and at least two braking components are symmetrically arranged; and/or, also include the spindle, the said coil base is fitted over the said spindle; and/or the coil holder is a magnetic conductor holder.
6. The electromagnetic brake of claim 4, further comprising an adjustment member through which the armature and the brake shoe are connected, the adjustment member being configured to adjust a gap between the armature and the brake shoe.
7. The electromagnetic brake of claim 6, wherein the adjusting member is an adjusting bolt, the armature has a first bolt hole, the brake shoe has a second bolt hole opposite to the first bolt hole, and two ends of the adjusting member are respectively inserted into the first bolt hole and the second bolt hole;
the first bolt hole is communicated with the second accommodating groove.
8. The electromagnetic brake according to any one of claims 3 to 7, characterized in that the brake shoe is covered with a friction plate, the friction plate is fixedly connected with the brake shoe, and when the brake assembly is in a braking state, the friction plate is abutted with the inner side wall of the brake disc;
the inner side wall of the brake disc is arc-shaped, the brake shoe is matched with the inner side wall of the brake disc, the curvature radius of the friction plate is equal to that of the brake disc, and the curvature radius of the brake shoe is equal to that of the friction plate.
9. The electromagnetic brake of any one of claims 1 to 7, further comprising a manual release structure, the manual release structure comprising a handle, a roller and a connecting rope, the handle being connected to the roller, the roller being rotatably connected to the coil holder, the connecting rope being connected to the brake assembly;
the handle can drive the roller to rotate around the coil holder, and when the brake assembly is in a braking state, the brake assembly is driven to be separated from the brake disc through the connecting rope, so that the brake assembly is switched to a releasing state.
10. A vehicle characterized by comprising a vehicle body and the electromagnetic brake of any one of claims 1 to 9 provided on the vehicle body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022406637.4U CN214063623U (en) | 2020-10-26 | 2020-10-26 | Electromagnetic brake and vehicle |
| PCT/CN2020/141026 WO2022088479A1 (en) | 2020-10-26 | 2020-12-29 | Electromagnetic brake, and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022406637.4U CN214063623U (en) | 2020-10-26 | 2020-10-26 | Electromagnetic brake and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214063623U true CN214063623U (en) | 2021-08-27 |
Family
ID=77397687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022406637.4U Active CN214063623U (en) | 2020-10-26 | 2020-10-26 | Electromagnetic brake and vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN214063623U (en) |
| WO (1) | WO2022088479A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178076A (en) * | 2020-10-26 | 2021-01-05 | 广州视源电子科技股份有限公司 | Electromagnetic brake and vehicle |
| CN118482122A (en) * | 2024-07-16 | 2024-08-13 | 万向(上海)技术有限公司 | Braking device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1497074A (en) * | 1974-06-05 | 1978-01-05 | Girling Ltd | Internal shoedrum brakes of the duo-servo type |
| US6315088B1 (en) * | 1999-08-24 | 2001-11-13 | Warner Electric Technology, Inc. | Spring-set electromagnetically released brake |
| CN201137657Y (en) * | 2007-12-14 | 2008-10-22 | 司也 | Electromagnetic anti-theft brake assembly |
| CN205864191U (en) * | 2016-07-08 | 2017-01-04 | 东莞市鸿技金属制品有限公司 | A kind of brake device for electrical machinery with hand switch |
| CN207315913U (en) * | 2017-09-09 | 2018-05-04 | 安徽庆泰汽车部件有限公司 | A kind of electromagnetism parking brake of double brake arm configuration |
-
2020
- 2020-10-26 CN CN202022406637.4U patent/CN214063623U/en active Active
- 2020-12-29 WO PCT/CN2020/141026 patent/WO2022088479A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178076A (en) * | 2020-10-26 | 2021-01-05 | 广州视源电子科技股份有限公司 | Electromagnetic brake and vehicle |
| CN118482122A (en) * | 2024-07-16 | 2024-08-13 | 万向(上海)技术有限公司 | Braking device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022088479A1 (en) | 2022-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214063623U (en) | Electromagnetic brake and vehicle | |
| US11220249B2 (en) | Electric park brake with electromagnetic brake | |
| US9752635B2 (en) | Clutch for a parking brake system | |
| EP3715664B1 (en) | Brake system with torque distributing assembly | |
| CN111030370B (en) | Motor with electromagnetic brake | |
| EP4122783B1 (en) | Electronic mechanical brake system and vehicle | |
| CN109733368B (en) | Failure-preventing brake-by-wire system and control method thereof | |
| CN110541897A (en) | commercial vehicle electronic mechanical brake with clamping force retaining function | |
| CN107588125A (en) | A kind of electric mechanical brake-by-wire device | |
| CN107420460A (en) | A kind of electric mechanical brake-by-wire device | |
| US6211590B1 (en) | Spring-applied pad and carrier brake | |
| CN112178076A (en) | Electromagnetic brake and vehicle | |
| US5699883A (en) | Spring-applied dual coil brake | |
| US6976563B1 (en) | Brake caliper with integral parking brake | |
| CN213892190U (en) | Electromagnetic brake and vehicle | |
| CN211266664U (en) | Motor assembly, brake assembly and vehicle brake assembly | |
| US20220290730A1 (en) | Brake apparatus and automobile | |
| CN116331991A (en) | Power-losing disc type double-braking brake | |
| CN212047315U (en) | Brake assembly and brake device with outage brake function | |
| CN214495534U (en) | Traction assembly for a land tractor | |
| CN212672286U (en) | Brake caliper, brake system and automobile | |
| KR102641599B1 (en) | Electric drum brake for rotating members | |
| CN108317186B (en) | Electronic mechanical brake-by-wire | |
| CN111169442A (en) | Brake assembly and brake device for realizing power-off brake function | |
| CN109624954A (en) | A kind of braking system and automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |