CN214465739U - Electronic mechanical brake device with magnetorheological fluid clutch - Google Patents
Electronic mechanical brake device with magnetorheological fluid clutch Download PDFInfo
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- CN214465739U CN214465739U CN202120576935.XU CN202120576935U CN214465739U CN 214465739 U CN214465739 U CN 214465739U CN 202120576935 U CN202120576935 U CN 202120576935U CN 214465739 U CN214465739 U CN 214465739U
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- ball screw
- push rod
- magnetorheological fluid
- screw shaft
- braking
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Abstract
The utility model relates to an electronic machinery arresting gear with magnetic current becomes liquid clutch comprises devices such as motor, fixed casing, magnetic current becomes liquid clutch, ball screw axle, push rod, return spring, brake disc, the casing includes centre wheel, planet wheel, external gear, planet carrier, the clutch includes driving part, magnetic current becomes liquid, driven part, ball screw axle one end links to each other with the clutch follower, and the other end is in the inlay inner chamber passageway that floats, the push rod passes through screw fixed connection with ball screw nut, moves along the inlay inner chamber passageway that floats. The utility model discloses a magnetic current becomes liquid clutch transmission and interrupted power, when braking, can change the transmission degree of braking moment of torsion through the different electric current of magnetic current becomes liquid clutch input, makes the braking more accurate, and when the release braking, the motor need not the reversal, and effectual shortening braking release time prolongs motor life, has improved automobile electron mechanical brake's wholeness ability.
Description
Technical Field
The utility model relates to an automobile brake system technique especially relates to an electromechanical arresting gear with magnetic current becomes liquid clutch.
Background
The brake system plays an important role in the safe driving process of the vehicle, the brake is an actuating device of the whole brake system, but the existing brake has a complex structure, low control precision, low response speed, high noise and other problems which are difficult to solve, and most of the existing automobiles use hydraulic braking, and under the condition of poor road surface, the brake fluid can generate vaporization phenomenon by continuously braking, bubbles are formed in a hydraulic pipeline, and the braking effect is seriously influenced.
At present, all aspects of an electronic mechanical brake system are more optimized than an electronic hydraulic brake system, but the existing electronic mechanical brake system mainly has the problems of low response speed, complex structure, low brake precision and the like, and the motor needs to be reversed when braking is released, so that the loss of the motor is large, and therefore, the electronic mechanical brake system which is simple in structure, high in brake precision, quick in response and capable of prolonging the service life of the motor has great significance.
Chinese patent No. CN209053996U discloses "an electronic mechanical brake based on a magnetic powder clutch", which uses the magnetic powder clutch to transmit and interrupt power, but the magnetic powder has higher energy consumption compared with magnetorheological fluid, is not easy to control, has slow response, and when releasing the brake, the device only uses the characteristic that the ball screw mechanism is not self-locked to make it automatically return, the brake release is not thorough, the friction plate is seriously worn, the noise is large, and the normal running of the vehicle is seriously affected.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides an electronic machinery arresting gear with magnetic current becomes liquid clutch, this arresting gear passes through magnetic current becomes liquid clutch transmission and interrupted power, can change the size of brake force transmission moment of torsion according to the demand, and need not the motor reversal when relieving the braking, has the response rapidly, easily control, advantage such as energy consumption low, under the prerequisite of guaranteeing the normal braking of vehicle, can improve vehicle brake performance effectively.
In order to solve the above problems, the present invention adopts the following technical solution, wherein the electromechanical brake device with a magnetorheological fluid clutch structurally comprises a motor, a fixed casing, a magnetorheological fluid clutch, a ball screw shaft, a push rod, a return spring, a first friction plate, a second friction plate, a brake disc, and the like, the fixed casing comprises a center wheel, a planet wheel, an external gear and a planet carrier, and the fixed casing is used for fixing the external gear in the speed reducing mechanism and preventing dust from entering the speed reducing mechanism; the magnetorheological fluid clutch comprises two rotary motion parts, namely a driving part and a driven part, wherein the driving part is connected with the planet carrier, and the driven part is connected with the ball screw shaft; the ball screw shaft is matched with the ball screw nut, so that the rotary motion of the ball screw shaft is converted into the linear motion of the ball screw nut; the push rod is fixedly connected with the ball screw nut through a screw, so that the push rod is driven to move forwards, the friction plate is pressed to the brake disc, and the vehicle is decelerated.
In the technical scheme, the head end of the push rod is in contact with the first friction plate through the through hole in the floating inlay, the sealing ring is arranged between the push rod and the floating inlay, and the push rod is pushed back under the action of elastic deformation of the sealing ring and the return spring when braking is relieved.
In the technical scheme, the part, connected with the floating inlay, of the ball screw shaft is provided with the clamping spring, so that the ball screw shaft cannot move axially and only can rotate under the action of the clamping spring.
In the technical scheme, the magnetorheological fluid clutch can effectively transmit and interrupt power, is quick in response, high in control precision, long in service life of the motor and cost-saving.
The utility model has the advantages that:
the utility model discloses a planetary gear reducer slows down and increases the turn round, and the drive ratio is big, and is small, and the motion is steady, and anti-vibration and impact capacity are strong, can transmit braking force well.
The utility model discloses use ball screw mechanism to change rotary motion into linear motion, transmission efficiency is high, and friction factor is little, and no auto-lock ability guarantees that the braking release is stable.
The utility model discloses use magnetic current becomes liquid clutch transmission power, can change the size in magnetic field through the different electric current of input to change the flow characteristic of magnetic current becomes liquid, it is controllable to realize the braking force transmission, makes the braking more accurate.
The utility model discloses use magnetic current to become liquid clutch and interrupt power, need not the motor reversal, prolonged the life of motor.
The utility model discloses a return spring makes the ball nut return, and response speed is fast, has shortened the time of braking release, has ensured the reliability of braking release.
The utility model discloses use the electromechanical braking, the pollution-free, the hydraulic brake weeping condition can not appear.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic diagram of the magnetorheological fluid clutch of the present invention.
Reference numerals: 1. the magnetic-field-type clutch comprises a motor, 2, a center wheel, 3, a fixed shell, 4, a planet carrier, 5, a driving part, 6, a driven part, 7, balls, 8, a ball screw nut, 9, a return spring, 10, a first friction plate, 11, a brake disc, 12, a second friction plate, 13, a floating inlay, 14, a sealing ring, 15, a push rod, 16, a screw, 17, a ball screw shaft, 18, a clamping spring, 19, magnetorheological fluid, 20, an outer gear, 21, a planet gear, 22, a coil and 23 magnetic lines.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the present invention relates to an electronic mechanical brake device with a magnetorheological fluid clutch, which comprises a motor 1, a center wheel 2, a fixed housing 3, a planet carrier 4, a driving part 5, a driven part 6, balls 7, a ball screw nut 8, a return spring 9, a first friction plate 10, a brake disc 11, a second friction plate 12, a floating inlay 13, a seal ring 14, a push rod 15, a screw 16, a ball screw shaft 17, a clamping spring 18, a magnetorheological fluid 19, an outer gear 20, and a planet gear 21; the central wheel 2, the planet carrier 4, the external gear 20 and the planet wheel 21 form a planet gear speed reducing system, and the output torque of the output shaft of the motor 1 is amplified to meet the torque required by braking; the magnetorheological fluid 19, the driving part 5 and the driven part 6 form a magnetorheological fluid clutch for power transmission and interruption; the ball screw shaft 17, the balls 7 and the ball screw nut 8 form a ball screw mechanism, and the rotary motion output by the magnetorheological fluid clutch driven part 6 is converted into linear motion for pushing the push rod 15 to move axially along the inner cavity channel of the floating inlay 13; one end of the push rod 1 close to the ball screw shaft 17 is fixedly connected with the ball screw nut 8 through a screw 16, and one end far away from the ball screw shaft 17 is in contact with the first friction plate 10 through a through hole in the floating inlay 13.
The utility model relates to an electronic machinery arresting gear with magnetic current becomes liquid clutch, ball screw shaft 17 and the inlay 13 department of meeting that floats are equipped with screens spring 18, make ball screw shaft 17 can only be rotary motion, can not be linear motion to guarantee that ball screw nut 8 can drive push rod 15 and be axial displacement.
The utility model relates to an electronic machinery arresting gear with magnetic current becomes liquid clutch, return spring 9 dress is at push rod 15 and float between inlay 13, guarantees to make 8 self return of ball screw nut when magnetic current becomes liquid clutch interrupt power transmission, shortens the braking release time, ensures that the braking release is thorough, improves the vehicle security of traveling.
As shown in fig. 2, which is a working schematic diagram of the magnetorheological fluid clutch of the present invention, the coil 22 is wound around the upper and lower ends of the magnetorheological fluid clutch and generates a magnetic force line 23; the magnetorheological fluid 19 is a working medium and is filled in a cavity between the active component 5 and the passive component 6, when no current flows in the coil 22, the magnetorheological fluid 19 has the characteristic of Newtonian fluid and cannot transfer friction torque, and at the moment, the magnetorheological fluid clutch is in a separation state; when current is introduced into the coil 22, a magnetic field with a certain direction and a certain strength is generated to act on the magnetorheological fluid 19, so that the magnetorheological fluid 19 is subjected to a curing reaction, the shear yield stress is increased, the torque transmitted between the driving part 5 and the driven part 6 is increased, when the torque is increased to a certain value, the driving part 5 drives the driven part 6 to rotate through the magnetorheological fluid 19 until the driving part 5 and the driven part rotate synchronously finally, and the clutch is jointed; when the current is cut off, the magnetic field acting on the magnetorheological fluid 19 disappears, the magnetorheological fluid 19 is quickly restored to the original state, and the magnetorheological fluid clutch returns to the separation state.
The working principle of the utility model is as follows.
When the automobile is braked, a brake pedal is stepped down, a brake signal is transmitted to the motor 1 after the brake signal is analyzed by the controller, the motor 1 rotates, torque is increased after the brake signal is acted by the planetary gear speed reducing mechanism, and increased power is transmitted to the magnetorheological fluid clutch driving part 5 by the planet carrier 4; when the brake is executed, current is introduced into the coil 22, the magnetorheological fluid clutch driving part 5 and the driven part 6 synchronously rotate and drive the ball screw shaft 17 connected with the driven part 6 to rotate, under the action of the ball screw mechanism, the ball screw nut 8 linearly moves to enable the push rod 15 fixedly connected with the ball screw nut to move towards the brake disc 11, and the return spring 9 is compressed; the push rod 15 presses the brake disc 11 along the floating inlay, the second friction plate 12 simultaneously abuts against the brake disc 11, and under the combined action of the first friction plate 10 and the second friction plate 12, a braking torque opposite to the moving direction is generated on the brake disc 11, so that the automobile is decelerated.
When a driver releases a brake pedal, the controller detects a signal for stopping braking, the current on the coil 22 is cut off, the magnetorheological fluid clutch returns to a separated state, at the moment, the motor 1 keeps rotating originally, the power of the ball screw shaft 17 is interrupted, the ball screw mechanism has no self-locking capacity, the elastic deformation of the return spring 9 and the sealing ring 14 is released, the push rod 15 moves back, the ball screw nut 8 moves towards the motor 1, and therefore the first friction plate 10 is separated from the brake disc 11, and braking is released.
After the brake is released, if the driver immediately steps on the brake pedal again, the coil 22 of the magnetorheological fluid clutch is electrified again, the driving part 5 and the driven part 6 of the magnetorheological fluid clutch are jointed again, and the brake process is repeated; if the driver no longer depresses the brake pedal, the control unit controls the motor 1 to stop rotating.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An electronic mechanical brake device with a magnetorheological fluid clutch comprises a motor (1), a fixed shell (3), a driving part (5), a driven part (6), balls (7), a ball screw nut (8), a return spring (9), a first friction plate (10), a brake disc (11), a second friction plate (12), a floating inlay (13), a sealing ring (14), a push rod (15), a screw (16), a ball screw shaft (17), a clamping spring (18) and magnetorheological fluid (19); the novel speed reducer is characterized in that a central wheel (2), a planet wheel (21), an external gear (20) and a planet carrier (4) are arranged in a fixed shell (3), the fixed shell (3) is used for fixing the external gear (20) in the speed reducer and preventing dust from entering the speed reducer, one end of a push rod (15) close to a ball screw shaft (17) is fixedly connected with a ball screw nut (8) through a screw (16), and a return spring (9) is fixed between the shoulder of the push rod (15) and a floating inlay (13).
2. Electromechanical brake device with magnetorheological clutch according to claim 1, characterized in that the magnetorheological clutch comprises two rotary motion parts, a driving part (5) and a driven part (6), the driving part (5) being connected to the planet carrier (4) and the driven part (6) being connected to the ball screw shaft (17).
3. The electromechanical brake device with magnetorheological fluid clutch according to claim 1, characterized in that the end of the push rod (15) far away from the ball screw shaft (17) is in contact with the first friction plate (10) via a through hole inside the floating inlay (13), and a gap is left between the shoulder of the push rod (15) and the floating inlay (13) so that the return spring (9) can be placed therein.
4. The electromechanical brake device with magnetorheological fluid clutch according to claim 1, wherein the ball screw shaft (17) is matched with the ball screw nut (8) to convert the rotation of the ball screw shaft (17) into the linear motion of the ball screw nut (8), so as to drive the push rod (15) to move forward to brake.
5. The electromechanical brake device with magnetorheological fluid clutch according to claim 1, characterized in that the part of the ball screw shaft (17) connected with the floating inlay (13) is provided with a blocking spring (18), and the ball screw shaft (17) can not move axially but only rotate under the action of the blocking spring (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120576935.XU CN214465739U (en) | 2021-03-22 | 2021-03-22 | Electronic mechanical brake device with magnetorheological fluid clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120576935.XU CN214465739U (en) | 2021-03-22 | 2021-03-22 | Electronic mechanical brake device with magnetorheological fluid clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214465739U true CN214465739U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120576935.XU Expired - Fee Related CN214465739U (en) | 2021-03-22 | 2021-03-22 | Electronic mechanical brake device with magnetorheological fluid clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214465739U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115257680A (en) * | 2022-09-05 | 2022-11-01 | 柏瑞科(上海)轨道交通科技有限公司 | Vibration reduction type electromechanical braking unit suitable for urban rail vehicle |
| CN115610397A (en) * | 2022-11-23 | 2023-01-17 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Electronic mechanical brake device |
-
2021
- 2021-03-22 CN CN202120576935.XU patent/CN214465739U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115257680A (en) * | 2022-09-05 | 2022-11-01 | 柏瑞科(上海)轨道交通科技有限公司 | Vibration reduction type electromechanical braking unit suitable for urban rail vehicle |
| CN115257680B (en) * | 2022-09-05 | 2024-04-16 | 马天和 | Damping type electromechanical braking unit suitable for urban rail vehicle |
| CN115610397A (en) * | 2022-11-23 | 2023-01-17 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Electronic mechanical brake device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211022 |