阅读说明：本技术 用于车门的电动止推系统及其电动止推装置 (Electric thrust system for vehicle door and electric thrust device thereof ) 是由 蓝政英 游思齐 吕佾锠 奚仲强 于 2019-02-01 设计创作，主要内容包括：本发明公开一种用于车门的电动止推系统及其电动止推装置,其中系统包括控制器、传感器及电动止推装置,电动止推装置包括缸体、止推组件及磁流变流体,缸体具有容腔,止推组件包括活塞、止推杆及线圈,活塞可移动性地设置在容腔内部,止推杆的一端连接活塞,另一端穿出缸体外部,线圈绕设活塞并形成在缸体的内部,活塞开设有贯穿孔,磁流变流体填注在容腔内；其中传感器侦测到移动物后将产生回授信号给控制器,并由控制器来控制电动止推装置的运作。借此,能够以主动方式来限制车门的开启。(The invention discloses an electric thrust system for a vehicle door and an electric thrust device thereof, wherein the system comprises a controller, a sensor and the electric thrust device, the electric thrust device comprises a cylinder body, a thrust assembly and magnetorheological fluid, the cylinder body is provided with a cavity, the thrust assembly comprises a piston, a thrust rod and a coil, the piston is movably arranged in the cavity, one end of the thrust rod is connected with the piston, the other end of the thrust rod penetrates out of the cylinder body, the coil is wound on the piston and formed in the cylinder body, the piston is provided with a through hole, and the magnetorheological fluid is filled in the cavity; the sensor detects the moving object and then generates a feedback signal to the controller, and the controller controls the operation of the electric thrust device. Thereby, the opening of the door can be restricted in an active manner.)

1. An electric thrust system for a vehicle door, comprising:

a controller;

a sensor electrically connected to the controller; and

the electric thrust device is electrically connected with the controller and comprises a cylinder body, a thrust assembly and magnetorheological fluid, the cylinder body is provided with a containing cavity, the thrust assembly comprises a piston, a thrust rod and a coil, the piston is movably arranged in the containing cavity, one end of the thrust rod is connected with the piston, the other end of the thrust rod penetrates out of the cylinder body, the coil is wound on the piston and formed in the cylinder body, the piston is provided with at least one through hole, and the magnetorheological fluid is filled in the containing cavity;

the sensor generates a feedback signal to the controller when detecting a moving object, and the controller controls the operation of the electric thrust device.

2. The electric thrust system for a vehicle door of claim 1 wherein the magnetorheological fluid operates as a brake assembly.

3. The electric thrust system for a vehicle door of claim 1 further comprising a battery electrically connected to the controller for providing power to the controller.

4. The electric thrust system for a vehicle door according to claim 1, wherein the electric thrust device further comprises a position sensing unit disposed on an inner wall surface of the cylinder corresponding to a movement range of the piston and electrically connected to the controller.

5. The electric thrust system for a vehicle door according to claim 1, wherein the through-hole is plural, and a shaft axis of each through-hole and a center axis of the piston are parallel to each other.

6. The electric thrust system for a vehicle door as claimed in claim 1, wherein a plurality of wire receiving grooves are formed on an outer circumferential surface of the piston, and the coil is wound around each of the wire receiving grooves of the piston.

7. The electric thrust system for a vehicle door according to claim 1, wherein one end of the cylinder body is hermetically covered with a rear cover, and a fixing block is connected to the rear cover, the other end of the cylinder body is hermetically covered with a front cover, a coupling hole is formed in the front cover, and the other end of the thrust rod is passed through the coupling hole.

8. The electric thrust system for a vehicle door of claim 1, wherein the sensor is one of an infrared radar, an ultrasonic radar, a millimeter wave radar, a laser radar, an image sensor, or a combination thereof.

9. An electric thrust device, comprising:

the cylinder body is provided with a containing cavity;

the thrust assembly comprises a piston, a thrust rod and a coil, wherein the piston is movably arranged in the cavity, one end of the thrust rod is connected with the piston, the other end of the thrust rod penetrates out of the cylinder body, the coil is wound on the piston and formed in the cylinder body, and the piston is provided with at least one through hole; and

a magnetorheological fluid filled in the cavity.

10. The electric thrust brake of claim 9 wherein the magnetorheological fluid is operable as a brake assembly.

11. The electric thrust brake of claim 9, further comprising a position sensing unit provided on an inner wall surface of the cylinder corresponding to a moving range of the piston.

12. The electric thrust brake of claim 9, wherein the through-hole is plural, and an axis of each through-hole is parallel to a center line of the piston.

13. The electric thrust brake of claim 9, wherein a plurality of wire receiving grooves are formed on the outer circumferential surface of the piston, and the coil is wound around each of the wire receiving grooves of the piston.

14. The electric thrust brake of claim 9, wherein one end of the cylinder is sealed and covered by a rear cover, and a fixed block is connected to the rear cover, and the other end of the cylinder is sealed and covered by a front cover, and a shaft hole is formed in the front cover, and the other end of the thrust rod is extended out of the shaft hole.

Technical Field

The invention relates to an anti-thrust technology of an automobile door, in particular to an electric anti-thrust system for the automobile door and an electric anti-thrust device thereof.

Background

With the increasing number of automobiles, the existing roads are not increased equally, so that various traffic accidents can be said to be endless, wherein casualties caused by opening the automobile door and not paying attention to the motorcycle which is driven backward suddenly are more frequent.

Although some manufacturers develop various prompts or warning devices, such as using a camera lens or matching with a warning sound to remind the driver or the passenger, the driver or the passenger often neglects the image or the warning sound of the camera lens when opening the door, and pushes the door of the car directly, which causes a car accident that the car coming from the rear is not timely reacted, and for the taxi driver, the passenger or the child can not be controlled to get off to open the door of the car in real time.

Disclosure of Invention

The invention mainly aims to provide an electric thrust system for a vehicle door, which can limit the opening of the vehicle door in an active mode through the mutual matching of all components, thereby reducing the occurrence of traffic accidents.

In order to achieve the above object, the present invention provides an electric thrust system for a vehicle door, including a controller, a sensor and an electric thrust device, wherein the sensor is electrically connected to the controller; the electric thrust device is electrically connected with the controller, the electric thrust device comprises a cylinder body, a thrust assembly and magnetorheological fluid, the cylinder body is provided with a containing cavity, the thrust assembly comprises a piston, a thrust rod and a coil, the piston is movably arranged in the containing cavity, one end of the thrust rod is connected with the piston, the other end of the thrust rod penetrates out of the cylinder body, the coil is wound on the piston and formed in the cylinder body, the piston is provided with at least one through hole, and the magnetorheological fluid is filled in the containing cavity; the sensor generates a feedback signal to the controller when detecting a moving object, and the controller controls the operation of the electric thrust device.

Optionally, the magnetorheological fluid is operable as a brake assembly.

Optionally, the electric vehicle further comprises a battery, wherein the battery is electrically connected with the controller and is used for providing electric power for the controller.

Optionally, the electric thrust brake further includes a position sensing unit disposed on an inner wall surface of the cylinder corresponding to the movement range of the piston and electrically connected to the controller.

Optionally, the number of the through holes is multiple, and the axis of each through hole is parallel to the center line of the piston.

Optionally, the outer circumferential surface of the piston is provided with a plurality of wire accommodating grooves, and the coil is surrounded in each wire accommodating groove of the piston.

Optionally, one end of the cylinder body is sealed and covered by a rear cover, the rear cover is connected with a fixed block, the other end of the cylinder body is sealed and covered by a front cover, the front cover is provided with an axial hole, and the other end of the thrust rod penetrates out of the axial hole.

Optionally, the sensor is one of an infrared radar, an ultrasonic radar, a millimeter wave radar, a laser radar, an image sensor, or a combination thereof.

Another object of the present invention is to provide an electric thrust brake which is simple in structure, easy to install, and quick in response.

In order to achieve the above another object, the present invention provides an electric thrust device, comprising a cylinder, a thrust assembly and a magnetorheological fluid, wherein the cylinder has a cavity; the thrust assembly comprises a piston, a thrust rod and a coil, the piston is movably arranged in the cavity, one end of the thrust rod is connected with the piston, the other end of the thrust rod penetrates out of the cylinder body, the coil is wound on the piston and formed in the cylinder body, and the piston is provided with at least one through hole; the magnetorheological fluid is filled in the cavity.

Optionally, the magnetorheological fluid is operable as a brake assembly.

Optionally, the piston further comprises a position sensing unit, and the position sensing unit is arranged on the inner wall surface of the cylinder corresponding to the movement range of the piston.

Optionally, the number of the through holes is multiple, and the axis of each through hole is parallel to the center line of the piston.

Optionally, the outer circumferential surface of the piston is provided with a plurality of wire accommodating grooves, and the coil is surrounded in each wire accommodating groove of the piston.

Optionally, one end of the cylinder body is sealed and covered by a rear cover, the rear cover is connected with a fixed block, the other end of the cylinder body is sealed and covered by a front cover, the front cover is provided with an axial hole, and the other end of the thrust rod penetrates out of the axial hole.

The invention also has the following effect that the whole volume is greatly reduced by arranging the coil in the cylinder body, thereby improving the use field and range of the electric thrust brake. By means of the arrangement of the position sensing unit, the position of the piston can be accurately controlled.

Drawings

FIG. 1 is a block diagram of an electric thrust system for a vehicle door of the present invention.

Fig. 2 is an external view of the electric thrust brake of the present invention.

Fig. 3 is a sectional view of the electric thrust brake of the present invention.

Fig. 4 is a schematic view of the electric thrust system of the present invention applied to an automobile.

Fig. 5 is a sectional view (i) showing a state of use of the electric thrust brake of the present invention.

Fig. 6 is a sectional view of the electric thrust device according to the present invention in a use state (ii).

FIG. 7 is a graph of yield strength and current for a magnetorheological fluid in accordance with the invention.

Fig. 8 is a graph of resistance and displacement of the electric thrust device and the mechanical thrust rod of the present invention.

In the figure:

10 … a controller; a 20 … sensor; 30 … electric thrust device; 31 … cylinders; 311, a cavity; 312 … rear cover; 313 … fixed blocks; 314 … front cover; 315 … axle hole; 32 … thrust assembly; 321 … a piston; 322 … thrust rod; 323 … coil; 3211 … through the hole; 3212 … wire accommodating groove; 33 … magnetorheological fluid; 34 … position sensing unit; a 40 … battery cell; 8 … automobile; 81 … vehicle body; 82 … vehicle door.

Detailed Description

The following detailed description and technical contents of the present invention are described with reference to the accompanying drawings, however, the contents shown in the drawings are provided for reference and description only and are not intended to limit the present invention.

Referring to fig. 1 to 3, the present invention provides an electric thrust system for a vehicle door and an electric thrust device thereof, wherein the electric thrust system for a vehicle door mainly includes a controller 10, a sensor 20 and an electric thrust device 30.

The controller 10 is an ECU (electronic Control unit) electronic Control unit, which is also called a "vehicle computer" or an "on-board computer", and the information of various states collected by the sensor 20 is sent to the ECU through a line responsible for transmission. After the ECU receives the signals, the ECU analyzes various signals to obtain the state of each component and the information of the operation condition, then automatically calculates according to a pre-written program, and in the state, the execution components should be allowed to do what, and then sends instructions to the execution components to command the execution components to work.

The sensor 20 is electrically connected to the controller 10, and may be an infrared radar, an ultrasonic radar, a millimeter-wave radar, a laser radar, an image sensor, or a combination thereof.

The electric thrust device 30 is electrically connected to the controller 10, and mainly includes a cylinder 31, a thrust assembly 32, and a magnetorheological fluid 33, the cylinder 31 is substantially cylindrical, but not limited to this shape, the cylinder 31 has a cavity 311 inside, one end of the cylinder 31 is sealed and covered by a rear cover 312, the outer side of the rear cover 312 is connected with a fixed block 313, the other end of the cylinder 31 is sealed and covered by a front cover 314, and the front cover 314 is provided with a shaft connecting hole 315.

The thrust assembly 32 includes a piston 321, a thrust rod 322, and a coil 323, wherein the piston 321 is a cylinder movably disposed inside the cavity 311, the piston 321 is provided with at least one through hole 3211, the through holes 3211 of the embodiment are plural, an axial line of each through hole 3211 is parallel to a central line of the piston 321, and a plurality of wire accommodating grooves 3212 are disposed on an outer circumferential surface of the piston 321. One end of the thrust rod 322 is connected to the piston 321, the other end of the thrust rod passes through the shaft hole 315 of the front cover 314 and out of the cylinder 31, and the coil 323 surrounds each wire receiving groove 3212 of the piston 321 and is formed inside the cylinder 31.

The magnetorheological fluid 33 is filled in the cavity 311, and can be used as a brake component, as shown in fig. 7, the magnetorheological fluid 33 (MRF) mainly comprises a carrier fluid, magnetic particles and a surfactant, when the magnetorheological fluid 33 is subjected to a magnetic field, the magnetic particles are arranged in a chain along the direction of the magnetic field, and the original Newton fluid (Newton fluid) immediately becomes a Bingham plastic (Bingham plastic) with a viscosity that increases instantly. If the magnetic field disappears, it immediately returns to the original Newtonian fluid, and its response time is only a few milliseconds. The diagram shows the change of the coil current and the fluid yield strength when the wire full magnetic field of the magnetorheological fluid acts. Wherein the carrier liquid can be oil, glycol or water; the magnetic particles may be iron-containing particles having a diameter of 1 μm to 10 μm.

The electric thrust device 30 of the present invention further includes a position sensing unit 34 disposed on the inner wall surface of the cylinder 31 corresponding to the moving range of the piston 321 and electrically connected to the controller 10 for detecting the position of the piston 321.

The electric thrust system for the vehicle door of the present invention further includes a battery 40 electrically connected to the controller 10 for providing power to the controller 10, wherein the battery 40 can still provide power to the controller 10 after the engine of the vehicle is turned off and the power is cut off.

Referring to fig. 4 to 6, it can be applied to a vehicle 8 having a vehicle body 81 and a door 82, wherein the sensor 20 can be installed at the rear end face of the door 82, the controller 10 is installed inside the door 82, one end of the thrust rod 322 is fixed to the vehicle body 81, the cylinder 31 is installed inside the front end of the door 82, and the cylinder 31 is prevented from rotating by the fixing block 313.

When the door 82 is pushed outward in use, the sensor 20 will start to detect a moving object behind, such as a pedestrian, various vehicles (e.g., car, motorcycle or bicycle), an animal, etc., and when the sensor 20 detects the moving object, a feedback signal will be generated to the controller 10, and the controller 10 will control the operation of the electric anti-thrust device 30.

The electric thrust device 30 is to change the magnetic field generated by the coil 323 through the controller 10, and when the coil 323 is a zero magnetic field, the magnetorheological fluid 33 is in a low viscosity state, so that the magnetorheological fluid 33 can easily circulate through the through holes 3211, and the piston 321 can move in the cavity 311, so that the door 82 can be opened (as shown in fig. 6); on the contrary, when the coil 323 is a strong magnetic field, the magnetorheological fluid 33 is in a high viscosity state, so that the magnetorheological fluid 33 cannot flow through the through holes 3211, the piston 321 is restricted or stopped in the cavity 311 and cannot move, and the vehicle door 82 cannot be pushed away to the outside.

Fig. 8 is a diagram showing the relationship between thrust force (resistance) and displacement (stroke of thrust rod), in which a conventional thrust rod controls pitch force by changing the shape of the thrust rod body, and a bump stop is used as a hard stop point of the mechanism to control the total stroke of the thrust rod, as shown by the solid-line trace in the figure. The electric thrust device 30 of the present invention changes the viscosity of the magnetorheological fluid 33 by increasing the current of the coil 323, so that the oil pressure mechanism generates resistance, and the stroke, the pitch force and the total mechanism stroke of the thrust rod 322 can be measured by a displacement meter, which can be changed by controlling, such as the moving track of the electric thrust rod (i) in the figure. The active current modulation can be used to design various force with different degrees, the number of the degrees and the control of the total stroke of the mechanism, and even the operation force for opening or closing the car door 82 can be controlled, such as the moving track of the electric thrust rod (II).

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.