CN110871776A - Electronic parking type brake actuating mechanism - Google Patents
Electronic parking type brake actuating mechanism Download PDFInfo
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- CN110871776A CN110871776A CN201811023409.XA CN201811023409A CN110871776A CN 110871776 A CN110871776 A CN 110871776A CN 201811023409 A CN201811023409 A CN 201811023409A CN 110871776 A CN110871776 A CN 110871776A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/746—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive and mechanical transmission of the braking action
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Abstract
The invention provides an electronic parking brake actuating mechanism, which comprises an end cover and a shell which are vertically packaged into a whole, wherein a main retainer is arranged between the end cover and the shell and is connected with a motor, a gear mechanism and a planetary gear transmission mechanism; the motor is engaged with the gear mechanism, the gear mechanism is coaxially arranged with the planetary gear transmission mechanism, and the gear mechanism and the planetary gear transmission mechanism are used for sequentially transmitting and outputting torque required by braking of the brake. The invention has the advantages of optimized integral structure, reduced integral volume and stable operation in mutual firm matching during assembly.
Description
The invention requires Chinese patent application 201811003014.3 with the name of' an electronic parking brake
Dynamic actuators "priority application.
Technical Field
The invention belongs to the technical field of automobile braking, and particularly relates to an electronic parking type brake actuating mechanism.
Background
The passenger car that host computer factory made at present uses drag-line parking braking or hydraulic pressure auxiliary type parking braking to give first place to, and along with consumer consumption theory's becoming mature day by day, more and more high-tech moves to the vehicle on, as traditional parking brake's substitution, back brake caliper can be integrated realizes the parking function through the parking actuating mechanism by motor drive. The integrated electronic parking brake necessarily needs to make proper adjustment on peripheral parts of a rear suspension on the aspect of spatial arrangement, but for a main engine factory, adjustment on the spatial arrangement is relatively easy to realize by a brand new design or a replacement design, but for vehicle models which are already produced in mass production, the smaller the change is better, and particularly for safety-related parts such as a suspension and a chassis, and the like. The external dimensions and the arrangement of the electronic parking brake actuator are subject to relatively high demands.
Disclosure of Invention
The invention aims to solve the technical problems of single overall dimension and arrangement form, large dimension, low space utilization rate, poor working stability, high manufacturing cost and the like of the traditional Electronic Parking Brake actuating mechanism, and provides an Electronic Parking Brake actuating mechanism (EPB).
The invention provides an electronic parking brake actuating mechanism, which comprises an end cover and a shell which are vertically packaged into a whole, wherein a main retainer is arranged between the end cover and the shell and is connected with a motor, a gear mechanism and a planetary gear transmission mechanism; the motor is engaged with the gear mechanism, the gear mechanism is coaxially arranged with the planetary gear transmission mechanism, and the gear mechanism and the planetary gear transmission mechanism are used for sequentially transmitting and outputting torque required by braking of the brake.
In the electronic parking brake actuating mechanism provided by the invention, the end cover is further provided with a current connector, and the current connector comprises a power supply wiring harness installation interface arranged outside the end cover, and a first power supply terminal and a second power supply terminal which are connected with the power supply wiring harness installation interface; the first power supply terminal and the second power supply terminal are symmetrically fixed in two sides of the end cover without relative movement and extend downwards from the end cover to form a connector structure; when the end cover is assembled with the shell, the first power terminal and the second power terminal are inserted into two motor terminals of the motor, which are installed on the shell, to form matching.
In the electronic parking brake actuator according to the present invention, the gear mechanism includes: the motor gear is arranged on a motor shaft of the motor in a press fit mode, the intermediate gear is meshed with the motor gear, and the large gear is meshed with the intermediate gear; wherein, the bull gear comprises a meshing wheel, a planet input wheel and a transition web; the meshing wheel and the planetary input wheel are coaxially arranged and synchronously rotate, the meshing wheel is arranged on the outer side, and the meshing wheel is used for meshing with the intermediate gear; the planetary input wheel is arranged at the inner side and is used for being meshed with the planetary gear transmission mechanism; the upper ends of the meshing wheel and the planet input wheel are connected through the transition web plate, and a cavity is formed between the meshing wheel and the planet input wheel.
In the electronic parking brake actuating mechanism, a central positioning boss is arranged between the transition amplitude plate and the planet input wheel, the central positioning boss is cylindrical, the diameter of the central positioning boss is larger than that of the planet input wheel, and the central positioning boss is used for being matched with the main retainer.
In the electronic parking brake actuating mechanism provided by the invention, at least one penetrating hollow structure is arranged on the transition amplitude plate.
In the electronic parking brake actuator according to the present invention, the main holder includes integrally: the device comprises a motor mounting part, a middle gear mounting part, a large gear mounting part and a planetary gear mechanism mounting part; a motor positioning boss is arranged in the center of the motor mounting part, the motor is fixed below the motor positioning boss, the motor shaft extends upwards from a motor positioning hole in the center of the motor positioning boss, and the motor gear is press-fitted on the motor shaft; an intermediate gear positioning shaft is arranged in the center of the intermediate gear mounting part and matched with the axis of the intermediate gear, the intermediate gear positioning shaft is mounted on the main retainer through press fit, and the upper end of the intermediate gear positioning shaft is matched with the end cover; the large gear mounting part comprises a large gear positioning boss, the upper side of the large gear positioning boss is matched with the cavity, a large gear positioning mounting hole is formed in the center of the large gear positioning boss, and the large gear positioning mounting hole is matched with the central positioning boss; the planet gear mechanism mounting part is arranged below the bull gear mounting part, the planet input wheel extends downwards from the bull gear positioning mounting hole, and the center of the planet input wheel is provided with a bull gear positioning shaft; the planetary gear mechanism mounting part comprises a planetary inner gear cavity, and the planetary inner gear cavity comprises a first planetary gear inner gear and a second planetary gear inner gear which are arranged up and down on the inner circumferential surface of the large gear positioning boss.
In the electronic parking brake actuating mechanism provided by the invention, a bearing is further arranged between the large gear positioning mounting hole and the planet input wheel or grease lubrication is adopted.
In the electronic parking brake actuating mechanism, the planetary gear transmission mechanism comprises a primary planetary gear transmission component and a secondary planetary gear transmission component; the centers of the first-stage planetary gear transmission assembly and the second planetary gear transmission assembly are coaxially arranged with the bull gear positioning shaft; the primary planetary gear transmission assembly is matched with the first planetary gear internal gear and the planetary input gear; and the secondary planetary gear transmission assembly is matched with the second planetary gear internal gear.
In the electronic parking brake actuator according to the present invention, the planetary gear transmission mechanism includes a protective sleeve disposed outside the first planetary gear transmission assembly and the second planetary gear transmission assembly, and the protective sleeve extends and is engaged with the main holder.
In the electronic parking brake actuating mechanism provided by the invention, the main retainer further comprises a fixing part and a rotation stopping part which are matched with the shell; the fixing part comprises a first auxiliary positioning sheath matched with the shell and a second auxiliary positioning sheath matched with the outer cylindrical surface of the motor, and the fixing part is used for keeping the motor stable; the rotation stopping parts are arranged on two sides of the main retainer.
In the electronic parking brake actuating mechanism provided by the invention, a motor damping sheet is arranged between the bottom of the motor and the shell.
Compared with the prior art, the invention has the beneficial effects that: the planetary gear transmission mechanism is used, the reduction ratio of the electronic parking brake actuating mechanism is improved, the efficiency of the electronic parking brake is improved, the main retainer is adopted to optimize the installation mode of a gear mechanism and the like, the space utilization rate of the electronic parking brake actuating mechanism is improved, the overall size of the electronic parking brake actuating mechanism is reduced, the overall size is reduced, the electronic parking brake actuating mechanism is firmly matched with each other during assembly, the operation is stable, and the cost is reduced. The invention is driven by a motor and generates the rotation torque required by the parking brake of the automobile brake so as to realize the parking function of the automobile. The invention redesigns the structure of the electronic parking brake actuator and further optimizes the external dimension based on the future requirement.
Drawings
FIG. 1 is a schematic view of an electronic parking brake actuator of the present invention.
Fig. 2 is a sectional view of an electronic parking brake actuator of the present invention.
Fig. 3 is a side sectional view of the electronic parking brake actuator of the present invention.
Fig. 4 is a schematic view of a gear mechanism.
Fig. 5 is an exploded view of the gear mechanism, planetary gear train and main carrier.
Fig. 6 is a structural view of the large gear.
Fig. 7 is a cross-sectional view of the main cage.
Detailed Description
The present invention will be described in further detail with reference to the following examples and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
1-7, 10-electronic parking brake actuator; 11-end cap; 11.1-a first power supply terminal; 11.2-a second power supply terminal; 11.3-power harness installation interface; 12-a housing; 12.1-mounting holes; 12.3-housing motor mounting holes; 20-a gear mechanism; 21-motor gear; 22-intermediate gear; 23-a bull gear; 23.1-meshing wheel; 23.2-planetary input wheel; 23.3-central positioning boss; 23.4-hollow structure; 23.5-the axis of the bull gear; 30-a planetary gear transmission mechanism; 31-a main cage; 31.1-big gear positioning and mounting holes; 31.2-intermediate gear positioning shaft; 31.3-motor positioning holes; 31.4 fixing parts; 31.5-a first auxiliary positioning sheath; 31.6 rotation stop members; 31.7-first planetary annulus gear; 31.8-second planetary annulus gear; 31.9-a second auxiliary positioning sheath; 32-a primary planetary gear drive assembly; 32.1-bull gear positioning shaft; 33-a secondary planetary gear transmission assembly; 33.1 — output spline; 33.2-secondary planetary gear cage; 34-a protective sleeve; 40-a motor; 40.1-motor positioning boss; 40.2-motor terminals; 40.3-the outer cylindrical surface of the motor; 41-damping sheet.
The invention provides an electronic parking type brake actuating mechanism, which solves the technical problems of single overall dimension and arrangement form, large dimension, low space utilization rate, poor working stability, high manufacturing cost and the like of the existing electronic parking type brake actuating mechanism. The electronic parking type stopping actuating mechanism comprises an end cover and a shell which are vertically packaged into a whole, wherein a main retainer is arranged between the end cover and the shell and is connected with a motor, a gear mechanism and a planetary gear transmission mechanism; the motor is engaged with the gear mechanism, the gear mechanism is coaxially arranged with the planetary gear transmission mechanism, and the gear mechanism and the planetary gear transmission mechanism are used for sequentially transmitting and outputting torque required by braking of the brake.
The end cover is further provided with a current connector, and the current connector comprises a power supply wiring harness installation interface arranged outside the end cover, and a first power supply terminal and a second power supply terminal which are connected with the power supply wiring harness installation interface; the first power terminal and the second power terminal are symmetrically fixed in two sides of the end cover without relative movement and extend downwards from the end cover to form a connector structure. More specifically, the first power terminal and the second power terminal are disposed inside the end cap through an injection molding process. When the end cover and the shell are assembled up and down through welding and other processes, and when the end cover and the shell are assembled, the first power supply terminal and the second power supply terminal are inserted into two motor terminals of the motor, which are arranged on the shell, to form matching, so that current transmission is realized. The design simplifies assembly and process, reduces cost, and improves system stability because there is no relative displacement between connectors.
Wherein the gear mechanism includes: the motor gear is arranged on a motor shaft of the motor in a press fit mode, the intermediate gear is meshed with the motor gear, and the large gear is meshed with the intermediate gear; the gear mechanism includes: the motor gear is arranged on a motor shaft of the motor in a press fit mode, the intermediate gear is meshed with the motor gear, and the large gear is meshed with the intermediate gear; wherein the bull gear includes an engaging wheel, a planetary input wheel and a transition web. The meshing wheel and the planetary input wheel are coaxially arranged and synchronously rotate, the meshing wheel is arranged on the outer side, and the meshing wheel is used for meshing with the intermediate gear; the planetary input wheel is arranged at the inner side and is used for being meshed with the planetary gear transmission mechanism; the upper ends of the meshing wheel and the planet input wheel are connected through the transition web plate, and a cavity is formed between the meshing wheel and the planet input wheel. And a central positioning boss is arranged between the transition amplitude plate and the planet input wheel, the central positioning boss is cylindrical, the diameter of the central positioning boss is larger than that of the planet input wheel, and the central positioning boss is used for being matched with the main retainer. At least one penetrating hollow structure is arranged on the transition breadth plate. The connecting part is provided with at least one hollow structure, the hollow structure is of a hole-like structure, and the hollow structure is used for optimizing the natural frequency of the gear wheel so as to improve the transmission noise.
Wherein, main holder is including integrative setting: the gear type planetary gear mechanism comprises a motor mounting part, a middle gear mounting part, a large gear mounting part and a planetary gear mechanism mounting part.
The motor gear is arranged in the motor mounting portion, the motor is fixed below the motor positioning boss, the motor shaft extends upwards from a motor positioning hole in the center of the motor positioning boss, and the motor gear is pressed on the motor shaft in a press fit mode. The motor passes through motor location boss fixed mounting on main holder for the motor location, main holder still provides the motor auxiliary stay function simultaneously, realizes motor auxiliary positioning through the cooperation of the outer face of cylinder of auxiliary positioning sheath characteristic on the main holder and motor promptly, is used for the motor not to take place relative displacement with the inseparable combination of holder under extreme operating mode.
The middle of the middle gear installation part is provided with a middle gear positioning shaft, and the middle gear positioning shaft is matched with the axis of the middle gear.
The gear wheel installation part comprises a gear wheel positioning boss, the upper side of the gear wheel positioning boss is matched with the cavity, a gear wheel positioning installation hole is formed in the center of the gear wheel positioning boss, and the gear wheel positioning installation hole is matched with the central positioning boss. A bearing is further arranged between the large gear positioning mounting hole and the planet input wheel or is lubricated by grease
The planet gear mechanism mounting part is arranged below the bull gear mounting part, the planet input wheel extends downwards from the bull gear positioning mounting hole, and the center of the planet input wheel is provided with a bull gear positioning shaft; the planetary gear mechanism mounting part comprises a planetary inner gear cavity, and the planetary inner gear cavity comprises a first planetary gear inner gear and a second planetary gear inner gear which are arranged up and down on the inner circumferential surface of the large gear positioning boss.
The planetary gear transmission mechanism comprises a primary planetary gear transmission assembly and a secondary planetary gear transmission assembly; the centers of the first-stage planetary gear transmission assembly and the second planetary gear transmission assembly are coaxially arranged with the bull gear positioning shaft; the primary planetary gear transmission assembly is matched with the first planetary gear internal gear and the planetary input gear; and the secondary planetary gear transmission assembly is matched with the second planetary gear internal gear.
Specifically, the primary planetary gear assembly includes one and a planetary gear holder, the primary planetary gear holder may contain a bearing lubrication unit, and the bearing unit and the primary planetary gear holder may be press-fit or otherwise connected. The inner surface of the bearing unit has a bearing function to ensure that the planet wheel retainer can freely rotate around the large gear positioning shaft. A large gear positioning shaft of the primary planetary gear retainer is fixedly arranged on the end cover, and in the installation process, the large gear positioning shaft penetrates through a positioning hole in the middle of the primary planetary gear retainer to position the primary planetary gear transmission assembly. Optionally, the gearwheel positioning shaft and the primary planet gear holder are fixedly connected by press-fitting or the like. The first-stage planetary gear transmission assembly transmits torque to the second-stage planetary gear transmission assembly through the first-stage planetary gear retainer, the first-stage planetary gear transmission assembly and the second planetary gear transmission assembly are coaxially arranged, the first-stage planetary gear transmission assembly and an inner gear mechanism of the second planetary gear transmission assembly are integrated on the main retainer as a whole, and the torque input by the first-stage planetary gear transmission assembly is matched with and outputs the torque through an output shaft in the middle of the second-stage planetary gear retainer and a corresponding brake spline mechanism. For improving stability, planetary gear drive is including setting up first planetary gear drive subassembly with the outside protective sheath of second planetary gear drive subassembly, extend on the protective sheath and with the main holder cooperatees, the protective sheath is used for doing planetary gear drive provides the axial spacing.
Wherein the main holder further comprises a fixing part and a rotation stopping part which are matched with the shell. The fixing part comprises a motor positioning part, a middle gear positioning part, a large gear positioning part, a planetary gear mechanism inner gear and the like, the fixing part comprises a first auxiliary positioning sheath matched with the shell and a second auxiliary positioning sheath matched with the outer cylindrical surface of the motor, and the fixing part is used for keeping the stability of the motor in working. Preferably, the rotation stopping members are symmetrically arranged and respectively located at both ends of the main holder to enhance the reliability of the positioning of the main holder.
In order to improve the positioning accuracy and the manufacturing accuracy, the matching surface between the main retainer and the shell is adjusted to be in a line-line, line-surface or surface-surface matching form similar to that of a reinforcing rib by surface-surface meshing, the shell and the retainer are molded by processes such as injection molding, errors existing in the manufacturing process can be compensated through the situation, and the assembly is facilitated; meanwhile, certain impact exists in the transmission process, and the combination mode is favorable for noise optimization. The motor is used for shock attenuation and noise optimization through installing the shock attenuation piece and the casing cooperation in the motor bottom.
Examples
In this embodiment, the electronic parking brake actuator 10 outputs a braking torque to the brake caliper, and drives a screw mechanism having a self-locking function on the brake caliper to perform parking braking of the vehicle.
As shown in fig. 1, the brake actuator 10 is driven by the motor 40 to provide a rotational power and amplifies a torque of the motor 40 through the gear mechanism 20 and outputs the torque, which is mounted to the brake through a mounting hole 12.1 provided on the housing 12. As shown in fig. 2, the electronic parking brake actuator 10 includes a housing 12, an end cap 11, a main holder 31, and a motor 40 mounted on the main holder 31, and a damper plate 41 is provided at the bottom of the motor. The actuator 10 also includes a gear mechanism 20 and a planetary gear train 30, which outputs torque through and via output splines 33.1 on a secondary planet carrier 33.2.
As shown in fig. 2, the end cap 11 and the housing 12 are welded to mount and hermetically enclose the actuator 10. The end cover 11 is arranged with a power harness installation interface 11.3, the power harness installation interface 11.3 provides the electric energy required by the rotation for the motor 40, the power harness installation interface 11.3 is connected with a first power terminal 11.1 and a second power terminal 11.2 (as shown in fig. 3), and the first power terminal 11.1 and the second power terminal 11.2 are firmly and fixedly connected with the end cover 11 through processes such as injection molding.
The end cover 11 is provided with a first power terminal 11.1 and a second power terminal 11.2, the first power terminal 11.1 and the second power terminal 11.2 are contacted with a motor terminal 40.2 (shown in figure 3) on the motor 40 in a manner similar to a connector buckle, and form a current loop; in the use process, the main retainer 31 well positions the motor 40 and the shell 12, so that the bonding strength of the motor terminal 40.2 and the first power supply terminal 11.1 and the second power supply terminal 11.2 is improved, the stability is improved, the assembly and the structural design are facilitated, and the design cost and the manufacturing cost are favorably reduced.
As shown in fig. 4, the gear mechanism 20 includes a motor gear 21, an intermediate gear 22 and a large gear 23, wherein the motor gear 21 is mounted on the motor shaft by press-fitting, the intermediate gear 22 is mounted on an intermediate gear positioning shaft 31.2 corresponding to the main holder 31 and is engaged with the gear of the motor gear 21 to realize torque transmission. The large gear 23 and the intermediate gear 22 are meshed as shown in fig. 4, 5 and 6, and the meshing wheel 23.1 is the meshing tooth of the large gear 23 and the intermediate gear 22, so that the torque input of the large gear 23 is realized; the bull gear 30 is provided with a planetary input wheel 23.2 in the middle to input torque into the planetary gear mechanism 30. Wherein the gearwheel 23 is arranged with a central positioning boss 23.3. As shown in fig. 4, the bull gear positioning and mounting hole 31.1 on the retainer 31 is matched with the central positioning boss 23.3, and the free rotation of the bull gear 23 can be realized. In order to improve the wear resistance and smooth rotation of the bull gear 23, the bull gear positioning and mounting hole 31.1 may be lubricated with grease or provided with a bearing to improve the performance. Similarly, the bearing or the like may be mounted on the central positioning boss 23.3 corresponding to the large gear 23.
As shown in fig. 5 and 7, the main holder 31 is mounted on the housing 12, and the main holder 31 is provided with a motor positioning hole 31.3 for positioning the motor 40, an intermediate gear positioning shaft 31.2, a large gear positioning mounting hole 31.1, a first internal planetary gear 31.7 and a second internal planetary gear 31.8. Meanwhile, the main holder 31 further includes a fixing member 31.4 and a rotation stopping member 31.6 for mounting the main holder 31 itself to the housing 13. The main holder 31 is further provided with a first auxiliary positioning sheath 31.5 and a second auxiliary positioning sheath 31.9 for auxiliary positioning of the motor 40, wherein the second auxiliary positioning sheath 31.9 is matched with the outer cylindrical surface 40.3 of the motor 40, the motor 40 is press-fitted and mounted on the motor positioning hole 31.3 corresponding to the holder 31 through a motor positioning boss in the mounting process, in order to improve the stability of the motor in the using process, the second auxiliary positioning sheath 31.9 on the main holder is matched with the outer cylindrical surface 40.3 of the motor to provide auxiliary support for the motor 40, meanwhile, the first auxiliary positioning sheath 31.5 is matched with the motor mounting hole 12.3 of the shell, the main holder 31 may generate relative displacement with the shell 12 in the working process, and the possibility of the relative displacement can be effectively controlled and reduced through the matching of the first auxiliary positioning sheath 31.5, so as to improve the stability of the operation and positioning of the motor 40.
As shown in fig. 5, the planetary gear mechanism 30 includes a primary planetary gear assembly 32 and a secondary planetary gear assembly 33. The planetary gear transmission mechanism is mounted in a planetary internal gear cavity of the main holder 31 through a protective sleeve 34 mounted on the main holder 31. The primary planetary gear assembly 31 includes one and a planetary gear holder, the primary planetary gear holder may contain a bearing lubrication unit, and the bearing unit and the primary planetary gear holder may be press-fit or otherwise connected. The inner surface of the bearing unit has a bearing function to ensure that the planet wheel retainer can freely rotate around the large gear positioning shaft. A large gear positioning shaft of the primary planetary gear holder is fixedly arranged on the end cover, and in the installation process, the large gear positioning shaft penetrates through a positioning hole in the middle of the primary planetary gear holder to position the primary planetary gear transmission assembly 31. Optionally, the gearwheel positioning shaft and the primary planet gear holder are fixedly connected by press-fitting or the like. The primary planetary gear transmission assembly 31 transmits torque to the secondary planetary gear transmission assembly 32 through the primary planetary gear holder, the primary planetary gear transmission assembly 31 and the second planetary gear transmission assembly 32 are coaxially arranged, the primary planetary gear transmission assembly 31 and an inner gear mechanism of the second planetary gear transmission assembly 32 are integrated on the main holder as a whole, and the torque input by the primary planetary gear transmission assembly 31 is matched and output through an output shaft in the middle of the secondary planetary gear holder and a corresponding brake spline mechanism.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. An electronic parking brake actuating mechanism is characterized by comprising an end cover and a shell which are vertically packaged into a whole, wherein a main retainer is arranged between the end cover and the shell and is connected with a motor, a gear mechanism and a planetary gear transmission mechanism; the motor is engaged with the gear mechanism, the gear mechanism is coaxially arranged with the planetary gear transmission mechanism, and the gear mechanism and the planetary gear transmission mechanism are used for sequentially transmitting and outputting torque required by braking of the brake.
2. The electronic parking brake actuator as defined in claim 1, wherein the end cap is further provided with a current connector comprising a power harness mounting interface disposed outside the end cap and first and second power terminals connected to the power harness mounting interface; the first power supply terminal and the second power supply terminal are symmetrically fixed in two sides of the end cover without relative movement and extend downwards from the end cover to form a connector structure; when the end cover is assembled with the shell, the first power terminal and the second power terminal are inserted into two motor terminals of the motor, which are installed on the shell, to form matching.
3. The electronic parking brake actuator as claimed in claim 1, wherein the gear mechanism comprises: the motor gear is arranged on a motor shaft of the motor in a press fit mode, the intermediate gear is meshed with the motor gear, and the large gear is meshed with the intermediate gear; wherein, the bull gear comprises a meshing wheel, a planet input wheel and a transition web; the meshing wheel and the planetary input wheel are coaxially arranged and synchronously rotate, the meshing wheel is arranged on the outer side, and the meshing wheel is used for meshing with the intermediate gear; the planetary input wheel is arranged at the inner side and is used for being meshed with the planetary gear transmission mechanism; the upper ends of the meshing wheel and the planet input wheel are connected through the transition web plate, and a cavity is formed between the meshing wheel and the planet input wheel.
4. The electronic parking brake actuator as recited in claim 3, wherein a central locating boss is provided between the transition web and the planetary input wheel, the central locating boss being cylindrical and having a larger diameter than the planetary input wheel, the central locating boss being adapted to engage the main holder.
5. The electronic parking brake actuator as recited in claim 3, wherein the transition web is provided with at least one through cutout.
6. The electronic parking brake actuator as claimed in claim 4, wherein the main holder includes integrally provided: the device comprises a motor mounting part, a middle gear mounting part, a large gear mounting part and a planetary gear mechanism mounting part;
a motor positioning boss is arranged in the center of the motor mounting part, the motor is fixed below the motor positioning boss, the motor shaft extends upwards from a motor positioning hole in the center of the motor positioning boss, and the motor gear is press-fitted on the motor shaft;
an intermediate gear positioning shaft is arranged in the center of the intermediate gear mounting part and matched with the axis of the intermediate gear, the intermediate gear positioning shaft is mounted on the main retainer through press fit, and the upper end of the intermediate gear positioning shaft is matched with the end cover;
the large gear mounting part comprises a large gear positioning boss, the upper side of the large gear positioning boss is matched with the cavity, a large gear positioning mounting hole is formed in the center of the large gear positioning boss, and the large gear positioning mounting hole is matched with the central positioning boss;
the planet gear mechanism mounting part is arranged below the bull gear mounting part, the planet input wheel extends downwards from the bull gear positioning mounting hole, and the center of the planet input wheel is provided with a bull gear positioning shaft; the planetary gear mechanism mounting part comprises a planetary inner gear cavity, and the planetary inner gear cavity comprises a first planetary gear inner gear and a second planetary gear inner gear which are arranged up and down on the inner circumferential surface of the large gear positioning boss.
7. The electronic parking brake actuator as claimed in claim 6, wherein the gear wheel positioning and mounting hole and the planetary input wheel are further provided with bearings or lubricated by grease.
8. The electronic parking brake actuator of claim 6, wherein the planetary gear drive includes a primary planetary gear drive assembly and a secondary planetary gear drive assembly; the centers of the first-stage planetary gear transmission assembly and the second planetary gear transmission assembly are coaxially arranged with the bull gear positioning shaft; the primary planetary gear transmission assembly is matched with the first planetary gear internal gear and the planetary input gear; and the secondary planetary gear transmission assembly is matched with the second planetary gear internal gear.
9. The electronic parking brake actuator of claim 8, wherein the planetary gear drive includes a protective sleeve disposed outside the first and second planetary gear drive assemblies, the protective sleeve extending over and cooperating with the main holder.
10. The electronic parking brake actuator according to claim 1 or 6, wherein the main holder further comprises a fixing part and a rotation stopping part engaged with the housing; the fixing part comprises a first auxiliary positioning sheath matched with the shell and a second auxiliary positioning sheath matched with the outer cylindrical surface of the motor, and the fixing part is used for keeping the motor stable; the rotation stopping parts are arranged on two sides of the main retainer.
11. The electronic parking brake actuator as claimed in any one of claims 1 to 10, wherein a motor damper plate is provided between the bottom of the motor and the housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811003014 | 2018-08-30 | ||
| CN2018110030143 | 2018-08-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110871776A true CN110871776A (en) | 2020-03-10 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811023409.XA Pending CN110871776A (en) | 2018-08-30 | 2018-09-03 | Electronic parking type brake actuating mechanism |
| CN201821437488.4U Active CN209410040U (en) | 2018-08-30 | 2018-09-03 | A kind of electronic parking formula brake actuator |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821437488.4U Active CN209410040U (en) | 2018-08-30 | 2018-09-03 | A kind of electronic parking formula brake actuator |
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| CN (2) | CN110871776A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111284468A (en) * | 2020-04-08 | 2020-06-16 | 格陆博科技有限公司 | Compact actuator for vehicle electronic parking system |
| CN111873973A (en) * | 2020-07-23 | 2020-11-03 | 平湖锟键汽车科技有限公司 | MGU unit of electron parking structure among new energy automobile |
| CN112590734A (en) * | 2020-11-26 | 2021-04-02 | 万向钱潮（上海）汽车系统有限公司 | Upper and lower cover design structure of electronic parking actuator |
| CN112610681A (en) * | 2020-11-30 | 2021-04-06 | 万向钱潮（上海）汽车系统有限公司 | Electronic parking gear transmission structure |
| CN114233850A (en) * | 2021-12-08 | 2022-03-25 | 斯沃博达汽车电子（昆山）有限公司 | Actuating mechanism for electronic parking brake |
-
2018
- 2018-09-03 CN CN201811023409.XA patent/CN110871776A/en active Pending
- 2018-09-03 CN CN201821437488.4U patent/CN209410040U/en active Active
Cited By (7)
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| CN111284468A (en) * | 2020-04-08 | 2020-06-16 | 格陆博科技有限公司 | Compact actuator for vehicle electronic parking system |
| CN111873973A (en) * | 2020-07-23 | 2020-11-03 | 平湖锟键汽车科技有限公司 | MGU unit of electron parking structure among new energy automobile |
| CN111873973B (en) * | 2020-07-23 | 2021-04-30 | 平湖锟键汽车科技有限公司 | MGU unit of electron parking structure among new energy automobile |
| CN112590734A (en) * | 2020-11-26 | 2021-04-02 | 万向钱潮（上海）汽车系统有限公司 | Upper and lower cover design structure of electronic parking actuator |
| CN112590734B (en) * | 2020-11-26 | 2022-05-27 | 万向钱潮（上海）汽车系统有限公司 | Upper and lower cover design structure of electronic parking actuator |
| CN112610681A (en) * | 2020-11-30 | 2021-04-06 | 万向钱潮（上海）汽车系统有限公司 | Electronic parking gear transmission structure |
| CN114233850A (en) * | 2021-12-08 | 2022-03-25 | 斯沃博达汽车电子（昆山）有限公司 | Actuating mechanism for electronic parking brake |
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| CN209410040U (en) | 2019-09-20 |
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