CN212155583U - Electronic parking brake device with better sealing performance for drum brake - Google Patents
Electronic parking brake device with better sealing performance for drum brake Download PDFInfo
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- CN212155583U CN212155583U CN201922267634.4U CN201922267634U CN212155583U CN 212155583 U CN212155583 U CN 212155583U CN 201922267634 U CN201922267634 U CN 201922267634U CN 212155583 U CN212155583 U CN 212155583U
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Abstract
The utility model discloses a better electron parking arresting gear who is used for drum brake of closure. The upper portion of the left shell assembly is provided with a through groove and a flower-shaped end shell, the flower-shaped end shell is communicated with the interior of the left shell assembly through the through groove, in the screw rod assembly, a motor output is coaxially and fixedly connected with a motor gear, the motor gear is meshed with helical teeth of a transition gear, the transition gear is coaxially and fixedly connected with a transition helical gear, the transition helical gear is meshed with helical teeth of an output gear, the output gear is sleeved with a screw rod, the flower-shaped end of the screw rod is inserted into the flower-shaped end shell to form a sliding pair, the other end of the screw rod is connected with a steel wire rope die-casting joint through a steel wire rope, the output gear is fixedly sleeved outside. The utility model discloses a helical gear transmission increases electron parking power device's moment of torsion, and the transmission is more steady, and crisscross axle helical gear transmission has changed the transmission direction simultaneously, has reduced electron parking power device's occupation space, simple structure, reliable, response are fast.
Description
Technical Field
The utility model relates to a better electron parking arresting gear for drum brake of closure belongs to car drive-by-wire braking technique.
Background
The parking brake is used for stabilizing the vehicle after the vehicle is stopped stably, and accidents caused by vehicle sliding when the vehicle is stopped on a slope are avoided. The automobile control system is transited from a mechanical control mode to an electronic control mode. Compared with a traditional mechanical hand brake, the electronic parking device can prevent accidental release, avoid the unsafe accidents that the parking device forgets to pull the hand brake and forgets to loosen the hand brake during starting, and is more reliable and convenient. The electronic parking can integrate the temporary braking function in the driving process and the long-time braking function after parking, and the technology of parking braking is realized in an electronic control mode. The conventional electronic parking brake system is powered by a motor and acts on a brake through a speed reducer to realize the braking performance. However, the drum brake has insufficient braking force stability, and the braking variation is large on different road surfaces, which is not easy to grasp. Meanwhile, the electronic parking brake device is lack of safety and reliability, and lack of sealing reliability.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects and shortcomings existing in the prior art, the drum brake electronic parking power device with better sealing performance is provided. The utility model discloses a structure is in accord with the transmission design, and the cost is cheap, can use on the drum brake that the volume is littleer.
The utility model adopts the technical proposal that:
the utility model comprises a shell, a motor, a screw assembly and a dustproof cover; the shell comprises a left shell assembly and a right shell assembly which are installed in a butt joint mode, a through groove is formed in the outer wall of the upper portion of the left shell assembly, a flower-shaped end shell is fixedly arranged on the outer wall of the upper portion of the left shell assembly, the flower-shaped end shell is communicated with the interior of the left shell assembly through the through groove, and the right shell assembly comprises a right shell body; the screw assembly comprises a screw, a steel wire rope and a steel wire rope die-casting joint; the output end of the motor faces upwards and is coaxially and fixedly connected with a motor gear, the motor gear is meshed with a transition gear through a bevel gear pair, the transition gear is coaxially and fixedly connected with a transition bevel gear through a gear shaft, the gear shaft is parallel to the output end of the motor, the transition bevel gear is meshed with an output gear through the bevel gear pair, a screw rod is sleeved in the output gear, and the screw rod is perpendicular to the gear shaft; one end of the screw is provided with a screw flower-shaped end, the screw flower-shaped end is in a cross section shape formed by connecting a middle round shape and three straight bars around the round shape, the three straight bars are uniformly distributed at intervals along the circumferential direction, an internal channel of the flower-shaped end shell is also in a cross section shape formed by connecting the middle round shape and the three straight bars around the round shape, so that the screw flower-shaped end is inserted into the flower-shaped end shell of the left shell assembly and matched to form a sliding pair, the other end of the screw is connected with a steel wire rope die-casting joint through a steel wire rope, the steel wire rope penetrates through the right shell body, and the dustproof sleeve is arranged at the position where the steel; the output gear is fixedly sleeved outside the connecting threaded sleeve, the connecting threaded sleeve is movably sleeved outside the screw rod through threads, and a needle roller thrust bearing and an angular contact bearing are arranged outside the screw rod at two ends of the connecting threaded sleeve; the outer end part of the needle roller thrust bearing, which is close to the flower-shaped end of the screw rod, is provided with a disc spring sleeve, the disc spring sleeve is fixed inside the shell, a disc spring is installed in the disc spring sleeve, one end of the disc spring is connected to the screw rod, and the other end of the disc spring is connected to the disc spring sleeve.
The bottom of the right shell body is provided with a socket and a contact pin, the contact pin is positioned in the right shell body, the socket is positioned outside the right shell body, a motor contact pin of the motor is electrically connected with the contact pin, and the contact pin penetrates through the bottom of the right shell body and then extends out of the socket to serve as a port for connecting an external power supply/control end and controlling the motor to work and supply power.
The needle roller thrust bearing is arranged close to the flower-shaped end of the screw, and the angular contact bearing is arranged close to the steel wire rope.
The steel wire rope pressure casting joint is connected to the end part of a brake pull wire of the drum brake.
And the upper contact pin of the shell assembly is fixedly welded with the contact pin of the motor.
The socket is used for connecting an external automobile electronic control unit to control the electronic parking power device.
The utility model has the advantages that:
the utility model discloses in, one-level gear drive adopts helical gear transmission and second grade gear drive to adopt crisscross axle helical gear driven transmission mode, can change transmission direction, the overall arrangement is more reasonable, the transmission is more steady, reduced electron parking power device's occupation space.
Meanwhile, compared with straight gear transmission, the helical gear transmission has the advantages of stable operation, small generated impact, small vibration, small noise and the like.
The invention adopts the dustproof cover to cover the whole thread part, thereby playing the roles of preventing lubricating oil from overflowing, supporting the external space of the screw rod to prevent external scraps, dust, oil stains and the like from permeating and playing the role of safety protection.
Drawings
FIG. 1 is an exploded view of the apparatus of the present invention;
FIG. 2 is a right housing assembly diagram of the device of the present invention;
FIG. 3 is a schematic view of the motor, gear transmission and screw transmission of the device of the present invention;
FIG. 4 is an exploded view of the motor, gear drive and screw drive of the device of the present invention;
FIG. 5 is a cross-sectional view of the threaded drive portion of the device of the present invention;
fig. 6 is a schematic view of the rotation direction of the motor, the gear transmission part and the thread transmission part when the motor positively rotates to park in the device of the utility model.
In the figure: (1) -a housing; (1-1) -a right housing assembly; (1-1-1) -a right housing body; (1-1-1-1) -a socket; (1-1-2) -pins; (1-2) -a left housing assembly; (1-2-1) -flower-shaped end shells; (2) -an electric machine; (2-1) -motor pin; (3-1) -a motor gear; (3-2) -transition gears; (3-3) -transition helical gear; (3-4) -an output gear; (4-1) -a gear shaft; (4-2) -a sliding bearing; (4-3) -deep groove ball bearings; (5-1) -connecting the threaded sleeve; (5-2) -disc spring; (5-3) -disc spring sleeve; (5-4) -needle thrust bearing; (5-5) -angular contact bearings; (6) -a screw assembly; (6-1) -screw; (6-1-1) -screw assembly flower-shaped end; (6-2) -steel cord; (6-3) -steel cord die-cast joint; (7) -a dust boot.
Detailed Description
The electronic parking power device for the drum brake, which is more stable in transmission, is further described with reference to the attached drawings of the specification.
As shown in fig. 1 and 2, the specific implementation includes a housing 1, a motor 2, a screw assembly 6, a dust-proof cover 7, a gear transmission mechanism and a thread transmission mechanism; the shell 1 comprises a left shell assembly 1-2 and a right shell assembly 1-1 which are installed in a butt joint mode, a through groove is formed in the outer wall of the upper portion of the left shell assembly 1-2, a flower-shaped end shell 1-2-1 is fixedly arranged on the outer wall of the upper portion of the left shell assembly 1-2, the flower-shaped end shell 1-2-1 is communicated with the interior of the left shell assembly 1-2 through the through groove, and the right shell assembly 1-1 comprises a right shell body 1-1-1.
As shown in fig. 3, 4 and 6, the screw assembly 6 comprises a screw 6-1, a steel wire rope 6-2 and a steel wire rope die-casting joint 6-3; the output end of the motor 2 is upward and coaxially fixedly connected with a motor gear 3-1, the motor gear 3-1 is meshed with a transition gear 3-2 by a bevel gear pair, the transition gear 3-2 is coaxially fixedly connected with the transition bevel gear 3-3 by a gear shaft 4-1, the gear shaft 4-1 is parallel to the output end of the motor 2, two ends of the gear shaft 4-1 are respectively supported and installed on a step seat arranged in the shell 1 by a sliding bearing 4-2 and a deep groove ball bearing 4-3, the transition bevel gear 3-3 is meshed with the output gear 3-4 by the bevel gear pair, in the specific implementation, when the output gear 3-4 is positioned under the motor gear 3-1, an optimal mounting position of the output gear 3-2 can be determined, which makes the transmission of the electronic parking power unit smoother. A screw 6-1 is sleeved in the output gear 3-4, and the screw 6-1 is vertical to the gear shaft 4-1; one end of the screw 6-1 is provided with a screw flower-shaped end 6-1-1, the screw flower-shaped end 6-1-1 adopts a cross section shape formed by connecting a middle round shape and three straight bars around the round shape at intervals along the circumferential direction, the internal channel of the flower-shaped end shell 1-2-1 also adopts a cross section shape formed by connecting the middle round shape and the three straight bars around the round shape, so that the screw flower-shaped end 6-1-1 is inserted into the flower-shaped end shell 1-2-1 of the left shell assembly 1-2 to be matched to form a sliding pair, the other end of the screw 6-1 is connected with a steel wire rope pressure casting joint 6-3 through a steel wire rope 6-2, the steel wire rope casting joint 6-3 is connected to the brake stay wire end of the brake, the steel wire rope 6-2 penetrates through the right shell body 1-1-1, the dustproof sleeve 7 is arranged at the position where the steel wire rope 6-2 penetrates out of the right shell body 1-1-1 for sealing.
One end of the dustproof sleeve 7 is arranged at the screw rod guide opening of the lower shell 1-1-1, and the other end of the dustproof sleeve is arranged on the screw rod assembly 6, so that the threaded part on the screw rod 6-1 is ensured to be in the dustproof sleeve 7 and move along with the screw rod assembly 6. When the motor 2 is electrified to drive the gear transmission mechanism, the connecting threaded sleeve 5-1 and the screw assembly 6 are in threaded transmission to drive the screw assembly 6 to axially move, and the brake pull arm is pulled or released to stretch the brake shoe and tightly press the brake drum to realize parking.
As shown in figure 5, an output gear 3-4 is fixedly sleeved outside a connecting threaded sleeve 5-1, the connecting threaded sleeve 5-1 is movably sleeved outside a screw rod 6-1 through threads, a needle roller thrust bearing 5-4 and an angular contact bearing 5-5 are arranged outside the screw rod 6-1 at two ends of the connecting threaded sleeve 5-1, the needle roller thrust bearing 5-4 is arranged close to a flower-shaped end 6-1 of the screw rod, the angular contact bearing 5-5 is arranged close to a steel wire rope 6-2, the needle roller thrust bearing 5-4, the screw rod 6-1, the needle roller thrust bearing 5-4 and the angular contact bearing 5-5 are respectively movably sleeved, and the connecting threaded sleeve 5-1 is fixed on a shell through the installation of the needle roller inference bearing 5-4 and the angular contact bearing 5-5. Meanwhile, the two bearings can bear the axial force generated by gear transmission and thread transmission; the outer end part of the needle roller thrust bearing 5-4 close to the flower-shaped end 6-1-1 of the screw rod is provided with a disc spring sleeve 5-3, the disc spring sleeve 5-3 is fixed inside the shell 1, a disc spring 5-2 is installed inside the disc spring sleeve 5-3, one end of the disc spring 5-2 is connected to the screw rod 6-1, the other end of the disc spring 5-2 is connected to the disc spring sleeve 5-3, and damping force is generated on the rotation of the screw rod 6-1 through the disc spring 5-2, so that the working current of the motor 2 is influenced.
To avoid thread lock of the connecting thread bush 5-1 and the screw assembly 6. One end of the shell is limited by matching the shell pattern end 121 with the screw assembly pattern end 6-1-1; the other end is limited by using a needle roller thrust bearing 5-4, a disc spring 5-2 and a disc spring sleeve 5-3. Resistance is generated by compressing the disc spring 5-2 and is fed back to the motor 2, and then current change generated by the motor 2 judges whether parking is completely released or not according to the current change, so that a sensor device is replaced.
The connecting thread bush 5-1 and the screw assembly 6 can realize the thread transmission with the self-locking function. The connecting thread sleeve 5-1 adopts trapezoidal threads, and has good manufacturability, good centering property, high tooth root strength and good wear resistance.
The bottom of the right shell body 1-1-1 is provided with a socket 1-1-1-1 and a contact pin 1-1-2, the contact pin 1-1-2 is positioned inside the right shell body 1-1-1, the socket 1-1-1 is positioned outside the right shell body 1-1-1, a motor contact pin 2-1 of the motor 2 is electrically connected with the contact pin 1-1-2, and the contact pin 1-1-2 penetrates through the bottom of the right shell body 1-1-1 and then extends out of the socket 1-1-1 to serve as a port for connecting an external power supply/control end and controlling the work and power supply of the motor 2.
The upper contact pin 1-1-2 of the shell assembly 1-1 is welded and fixed with the contact pin 2-1 of the motor, and the contact pin 1-1-1-1 is used for connecting an external automobile electric control unit to control the electronic parking power device.
The utility model discloses a gear drive include one-level helical gear drive and second grade staggered shaft helical gear drive, and one-level helical gear drive includes motor gear 3-1 as the action wheel and transition gear 3-2 as from the driving wheel, and second grade staggered shaft helical gear drive includes transition helical gear 3-3 as the action wheel and output gear 3-4 as from the driving wheel. The mode of primary helical gear transmission and secondary staggered shaft helical gear transmission is adopted, so that the stability of the braking effect can be effectively improved.
In the screw transmission mechanism, an output gear 3-4 is connected with a connecting screw sleeve 5-1 and fixedly drives the connecting screw sleeve 5-1 to synchronously rotate, and the screw 6-1 of the screw assembly 6 is limited to rotate by the connecting screw sleeve 5-1 and the screw 6-1 of the screw assembly 6 through a flower-shaped end shell 1-2-1, so that the screw 6-1 of the screw assembly 6 is finally driven to axially move.
When the motor 2 is electrified to drive the gear transmission mechanism, the connecting threaded sleeve 5-1 and the screw assembly 6 are in threaded transmission to drive the screw assembly 6 to axially move, and the brake pull arm is pulled or released to stretch the brake shoe and tightly press the brake drum to realize parking.
The working process of the utility model is as follows:
the motor 2 is electrified to rotate forwards, the motor gear 3-1 drives the transition gear 3-2, the transition gear 3-2 drives the transition bevel gear 3-3 on the same gear shaft, the transition bevel gear drives the output gear 3-4 on the staggered shaft 3-3, the output gear 3-4 is connected and fixed with the external thread of the connecting threaded sleeve 5-1, the internal thread of the connecting threaded sleeve 5-1 rotates along with the rotation and drives the screw assembly 6 in threaded transmission with the internal thread to pull up axially, and the parking is realized on the pull arm of the brake drum.
The motor 2 is electrified and reversely rotated, the motor gear 3-1 drives the transition gear 3-2, the transition gear 3-2 drives the transition bevel gear 3-3 on the same gear shaft, the transition bevel gear 3-3 drives the output gear 3-4 on the staggered shaft, the output gear 3-4 is connected and fixed with the external thread of the connecting threaded sleeve 5-1, the internal thread of the connecting threaded sleeve 5-1 rotates along with the rotation and drives the screw rod assembly 6 in threaded transmission with the connecting threaded sleeve to be pulled up in the axial direction in the reverse direction, and the internal thread acts on the pull arm of the brake drum to release parking.
Therefore, the utility model discloses a helical gear transmission increases electron parking power device's moment of torsion, and the transmission is more steady, and crisscross axle helical gear transmission has changed the transmission direction simultaneously, has reduced electron parking power device's occupation space, simple structure, reliable, response are fast.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. An electronic parking brake device for a drum brake with better sealing performance is characterized in that:
comprises a shell (1), a motor (2), a screw assembly (6) and a dustproof sleeve (7); the shell (1) comprises a left shell assembly (1-2) and a right shell assembly (1-1) which are installed in a butt joint mode, a through groove is formed in the outer wall of the upper portion of the left shell assembly (1-2) and a flower-shaped end shell (1-2-1) is fixedly arranged on the outer wall of the upper portion of the left shell assembly (1-2), the flower-shaped end shell (1-2-1) is communicated with the interior of the left shell assembly (1-2) through the through groove, and the right shell assembly (1-1) comprises a right shell body (1-1-1); the screw assembly (6) comprises a screw (6-1), a steel wire rope (6-2) and a steel wire rope die-casting joint (6-3); the output end of the motor (2) faces upwards and is coaxially and fixedly connected with a motor gear (3-1), the motor gear (3-1) is meshed with a transition gear (3-2) through a bevel gear pair, the transition gear (3-2) and the transition bevel gear (3-3) are coaxially and fixedly connected through a gear shaft (4-1), the gear shaft (4-1) is parallel to the output end of the motor (2), the transition bevel gear (3-3) is meshed with an output gear (3-4) through the bevel gear pair, a screw rod (6-1) is sleeved in the output gear (3-4), and the screw rod (6-1) is perpendicular to the gear shaft (4-1); one end of the screw (6-1) is provided with a screw flower-shaped end (6-1-1), the screw flower-shaped end (6-1-1) adopts a cross section shape formed by connecting a middle round shape and three straight bars around the round shape at intervals along the circumferential direction, an internal channel of the flower-shaped end shell (1-2-1) also adopts a cross section shape formed by connecting the middle round shape and three straight bars around the round shape, so that the screw flower-shaped end (6-1-1) is inserted into the flower-shaped end shell (1-2-1) of the left shell assembly (1-2) to be matched to form a sliding pair, the other end of the screw (6-1) is connected with a steel wire rope die-casting joint (6-3) through a steel wire rope (6-2), the steel wire rope (6-2) penetrates through the right shell body (1-1-1), the dustproof sleeve (7) is arranged at the position where the steel wire rope (6-2) penetrates out of the right shell body (1-1-1) for sealing; the output gear (3-4) is fixedly sleeved outside the connecting threaded sleeve (5-1), the connecting threaded sleeve (5-1) is movably sleeved outside the screw rod (6-1) through threads, and a needle roller thrust bearing (5-4) and an angular contact bearing (5-5) are arranged outside the screw rod (6-1) at two ends of the connecting threaded sleeve (5-1); a disc spring sleeve (5-3) is arranged at the outer end part of the needle roller thrust bearing (5-4) close to the flower-shaped end (6-1-1) of the screw, the disc spring sleeve (5-3) is fixed inside the shell (1), a disc spring (5-2) is installed in the disc spring sleeve (5-3), one end of the disc spring (5-2) is connected to the screw (6-1), and the other end of the disc spring sleeve (5-3) is connected to the disc spring sleeve.
2. A more closed electronic parking brake device for a drum brake according to claim 1, characterized in that: the bottom of the right shell body (1-1-1) is provided with a socket (1-1-1-1) and a contact pin (1-1-2), the contact pin (1-1-2) is positioned inside the right shell body (1-1-1), the socket (1-1-1) is positioned outside the right shell body (1-1-1), a motor contact pin (2-1) and the contact pin (1-1-2) of the motor (2) are electrically connected, and the contact pin (1-1-2) penetrates through the bottom of the right shell body (1-1-1) and then extends out of the socket (1-1-1-1) to serve as a port for connecting an external power supply/control end and controlling the work and power supply of the motor (2).
3. A more closed electronic parking brake device for a drum brake according to claim 1, characterized in that: the needle roller thrust bearing (5-4) is arranged close to the screw flower-shaped end (6-1-1), and the angular contact bearing (5-5) is arranged close to the steel wire rope (6-2).
4. A more closed electronic parking brake device for a drum brake according to claim 1, characterized in that: the steel wire rope die-casting joint (6-3) is connected to the end part of a brake pull wire of the drum brake.
5. A more closed electronic parking brake device for a drum brake according to claim 1, characterized in that: and the upper contact pin (1-1-2) of the shell assembly (1-1) is welded and fixed with the motor contact pin (2-1).
6. A more closed electronic parking brake device for a drum brake according to claim 2, wherein: the socket (1-1-1-1) is used for connecting an external automobile electronic control unit to control the electronic parking power device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922267634.4U CN212155583U (en) | 2019-12-17 | 2019-12-17 | Electronic parking brake device with better sealing performance for drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922267634.4U CN212155583U (en) | 2019-12-17 | 2019-12-17 | Electronic parking brake device with better sealing performance for drum brake |
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| Publication Number | Publication Date |
|---|---|
| CN212155583U true CN212155583U (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922267634.4U Active CN212155583U (en) | 2019-12-17 | 2019-12-17 | Electronic parking brake device with better sealing performance for drum brake |
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| CN (1) | CN212155583U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115339428A (en) * | 2022-08-29 | 2022-11-15 | 四川野马汽车股份有限公司 | Parking braking device for drum brake |
-
2019
- 2019-12-17 CN CN201922267634.4U patent/CN212155583U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115339428A (en) * | 2022-08-29 | 2022-11-15 | 四川野马汽车股份有限公司 | Parking braking device for drum brake |
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