A safety opening device for a vehicle door

Abstract

A kind of automobile door safety opening device, including electric control damping mechanism, cam type connecting piece, electric control unit, electric control damping mechanism is hydraulic damping system, it is installed on the door frame of automobile, it is composed of shell, push rod, piston one, piston two, return spring, two flow limiting plates with same through hole, two flow limiting plates are located between piston one and piston two, and it is filled with hydraulic oil between piston one and piston two;Cam type connecting piece is fixedly connected with automobile door hinge.The beneficial effects of the utility model are: when the person in the car gets off, triggers door lock inductor, control unit enables radar system to monitor the situation around the vehicle, if it is monitored that there is no obstacle beside the vehicle, the person in the car can normally open and close the door, if it is monitored that there is obstacle beside the vehicle, control unit drives motor to rotate, adjusts the damping strength of electric control damping mechanism, and the situation of " door kill " can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronics technology, specifically to a car door safety opening device. Background Technology

[0002] In daily life, the simple act of opening a car door and letting passengers out frequently results in traffic accidents, a phenomenon commonly known as "door-opening accidents." A "door-opening accident" occurs when a passenger or driver opens the car door without carefully checking for pedestrians or oncoming vehicles, leaving them no time to react and ultimately causing a traffic accident. Therefore, designing a safe car door opening device to prevent injury to vehicles or pedestrians behind is essential. Summary of the Invention

[0003] The purpose of this invention is to provide a safe car door opening device to solve the problem of "door opening kill".

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A car door safety opening device includes an electrically controlled damping mechanism, a cam-type connector, and an electronic control unit. The electrically controlled damping mechanism is a hydraulic damping system installed on the car door frame. It consists of a housing, a push rod, a first piston, a second piston, a return spring, and two flow-limiting plates. The first piston, the two flow-limiting plates, and the second piston are all located inside the housing, and the two flow-limiting plates are located between the first piston and the second piston. The space between the first piston and the second piston is filled with hydraulic oil. The flow-limiting plates have the same number of through holes.

[0006] The end of piston two away from flow limiting plate two is connected to the inner wall of the outer shell through a return spring. The end of piston one away from flow limiting plate one is fixedly connected to a push rod. The other end of the push rod passes through the outer shell. Flow limiting plate one is fixedly connected to the inner wall of the outer shell.

[0007] The cam-shaped connector is fixedly connected to the car door hinge, and the cam-shaped connector corresponds to the electronically controlled damping mechanism.

[0008] Furthermore, the electronic control unit consists of a radar, a control unit, a motor, and a door lock sensor. The control unit receives the door opening signal from the door lock sensor, activates the radar to monitor information around the vehicle, and controls the rotation angle of the motor based on the radar feedback information.

[0009] Furthermore, the outer end of the outer shell away from the push rod is provided with a cavity, the motor is located inside the cavity, and the output axis of the motor extends outward, penetrating the outer wall of the outer shell and the piston and the flow limiting plate are coaxially fixed.

[0010] Furthermore, an oil seal is provided at the connection between the motor output shaft and the piston.

[0011] Furthermore, elastic sealing rings are provided at the positions where piston one, piston two, and flow limiting plate two contact the inner wall of the outer casing. Beneficial effects

[0012] Compared with the prior art, the beneficial effects of this utility model are: when a person gets out of the vehicle and pulls the door handle, the door lock sensor is triggered, and the control unit activates the radar system to monitor the surrounding situation of the vehicle.

[0013] 1. If no obstacles are detected next to the vehicle, when the occupants open the door to get out of the vehicle, the cam-type connector pushes the push rod, and the door can be opened smoothly;

[0014] 2. If an obstacle is detected next to the car, when the obstacle gets close to the car and reaches the set threshold, the control unit drives the motor to rotate. The motor drives the second flow limiter to rotate. When the second flow limiter rotates, it can block the through hole on the first flow limiter, thereby adjusting the diameter of the through hole on the first flow limiter and increasing the damping force of the electronically controlled damping mechanism. At this time, when the people in the car get out of the car, they will feel resistance, thus reminding them to pay attention to the situation around the car door.

[0015] 3. When the control unit detects that the obstacle is approaching at a relatively fast speed, the control unit controls the motor to rotate. The motor drives the second flow limiter to rotate, completely blocking the through hole on the first flow limiter. At this time, the damping force is at its maximum, and it is not easy for people getting out of the car to open the door, which can effectively avoid the situation of "door opening kill".

[0016] 4. When the control unit detects that the obstacle is moving away from the car, it controls the motor to continue rotating so that the through holes of the second flow limiter and the first flow limiter are in the initial state of complete overlap, so as to facilitate the next use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0018] Figure 2 This is a schematic diagram showing the connection state of this utility model with the hinge at the car door;

[0019] Figure 3 This is a top view of the closed and open states of this utility model;

[0020] Figure 4 This is a schematic diagram showing the overlapping state of the through holes of the first and second flow limiting plates of this utility model;

[0021] Figure 5 This is a schematic diagram showing the state of the flow-limiting plate partially blocking the two through holes of the flow-limiting plate according to this utility model;

[0022] Figure 6This is a schematic diagram showing the state of the flow limiting plate completely blocking the through hole of the flow limiting plate 2 in this utility model.

[0023] Figure 7 This is the circuit schematic diagram of this utility model;

[0024] Figure 8 This is a schematic diagram showing the connection between the motor and the outer shell cavity of this utility model;

[0025] Figure 9 This is a front sectional view of the electrically controlled damping mechanism of this utility model.

[0026] Explanation of reference numerals in the attached drawings: 1. Electrically controlled damping mechanism; 11. Housing; 12. Push rod; 131. Piston 1; 132. Piston 2; 14. Return spring; 151. Flow limiting plate 1; 152. Flow limiting plate 2; 2. Cam-type connector; 3. Electrical control unit; 31. Radar; 32. Control unit; 33. Motor; 34. Door lock sensor; 35. Hinge at the car door. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0029] Please see Figures 1-9 A car door safety opening device includes an electronically controlled damping mechanism 1, a cam-type connector 2, and an electronic control unit 3. The electronically controlled damping mechanism 1 is a hydraulic damping system installed on the car door frame. It consists of a housing 11, a push rod 12, a first piston 131, a second piston 132, a return spring 14, and two flow-limiting plates. The first piston 131, the two flow-limiting plates, and the second piston 132 are all located inside the housing, and the two flow-limiting plates are located between the first piston 131 and the second piston 132. The space between the first piston 131 and the second piston 132 is filled with hydraulic oil. The same number of through holes are opened on the flow-limiting plates.

[0030] One end of piston 132 away from flow limiting plate 152 is connected to the inner wall of housing 11 via return spring 14. One end of piston 131 away from flow limiting plate 151 is fixedly connected to push rod 12. The other end of push rod 12 passes through housing 11. Flow limiting plate 151 is fixedly connected to the inner wall of housing 11.

[0031] The cam-type connector 2 is fixedly connected to the car door hinge, and the cam-type connector 2 corresponds to the electronically controlled damping mechanism 1.

[0032] As a preferred option, the electronic control unit 3 further comprises a radar 31, a control unit 32, a motor 33, and a door lock sensor 34. The control unit 32 receives the door opening signal from the door lock sensor 34, activates the radar 31 to monitor the information around the vehicle, and controls the rotation angle of the motor 33 based on the feedback information from the radar 31.

[0033] As a preferred embodiment, the outer end of the housing 11 away from the push rod 12 is provided with a cavity, the motor 33 is located inside the cavity, and the output axis of the motor 33 extends outward, penetrating the outer wall of the housing 11 and the piston 132 and being coaxially fixed to the flow limiting plate 152.

[0034] As a preferred option, an oil seal is provided at the connection between the output shaft of motor 33 and piston 2 132.

[0035] As a preferred option, furthermore, elastic sealing rings are provided at the positions where piston 131, piston 2132, and flow restrictor 2152 contact the inner wall of the outer casing 11.

[0036] Working principle:

[0037] For specific implementation details, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 The cam-type connector 2 can be connected to the hinge of the car door by riveting or welding. The electronically controlled damping mechanism 1 is installed on the door frame at the position corresponding to the cam-type connector 2. When the car door is in the closed state, the states of the cam-type connector 2 and the electronically controlled damping mechanism 1 are as follows: Figure 3 As shown in Figure a, when the door is in the open state, the states of the cam-type connector 2 and the electrically controlled damping mechanism 1 are as follows: Figure 3 As shown in Figure b;

[0038] The space between piston 131 and piston 2 132 is filled with hydraulic oil. The resistance comes from the resistance generated by the flow of hydraulic oil between piston 1 and piston 2. The through holes of flow restrictor 151 and flow restrictor 2 152 are completely overlapped. Figure 4As shown, at this time, the damping of the electronically controlled damping mechanism 1 is at its minimum. When the door is opened, the hydraulic oil is pushed to the area between piston 2 and flow limiting plate 2. When the door is closed, the hydraulic oil is pushed to the area between piston 1 and flow limiting plate 1.

[0039] When passengers open the door to get out of the vehicle, they should pull the door handle. Please refer to [link / reference needed]. Figure 7 Door lock sensor 34 is triggered.

[0040] The control unit 32 receives a signal from the door lock sensor 34 and activates the radar 31 to monitor the surroundings of the vehicle. If an obstacle is detected approaching the vehicle or approaching at a relatively fast speed, reaching a set threshold, the control unit 32 controls the motor 33 to operate.

[0041] 1. When radar 31 detects an obstacle approaching the car and reaching a set threshold,

[0042] Control unit 32 controls motor 33 to rotate. The output shaft of motor 33 rotates, causing current limiting plate 152 to rotate. Current limiting plate 152 partially blocks the through hole of current limiting plate 151. Figure 5 As shown, this increases the damping force of the electronically controlled damping mechanism 1, attracting the attention of passengers getting off the vehicle and prompting them to observe the situation near the door to avoid a "door-opening kill" situation.

[0043] 2. When radar 31 detects that an obstacle is approaching the car at a relatively high speed, reaching a set threshold, control unit 32 controls motor 33 to rotate, and flow restrictor 2 152 completely blocks the through-hole of flow restrictor 1 151. Figure 6 As shown, at this time, the damping force of the electronically controlled damping mechanism 1 is at its maximum, and the door cannot be opened when the people inside the vehicle try to open it.

[0044] 3. When radar 31 detects that an obstacle around the vehicle has left the monitoring range, control unit 32 starts the motor to rotate, causing the second flow restrictor 152 to align with the through hole of the first flow restrictor 151, such as... Figure 4 As shown, the damping of the electronically controlled damping mechanism is at its minimum at this time, allowing people to open and close the car door normally. When opening the door, the hydraulic oil between piston 131 and flow restrictor 151 is pushed to the area between piston 2132 and flow restrictor 152. When closing the door, under the action of the return spring 14, piston 2132 moves to the right, and the hydraulic oil is pushed back to the area between piston 131 and flow restrictor 151. This ensures normal operation the next time the door is opened.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A car door safety opening device, comprising an electronically controlled damping mechanism (1), a cam-type connector (2), and an electronic control unit (3), characterized in that: The electronically controlled damping mechanism (1) is a hydraulic damping system, installed on the door frame of the car. It consists of a housing (11), a push rod (12), piston one (131), piston two (132), a return spring (14), and two flow limiting plates. Piston one (131), the two flow limiting plates, and piston two (132) are all located inside the housing, and the two flow limiting plates are located between piston one (131) and piston two (132). The space between piston one (131) and piston two (132) is filled with hydraulic oil. The same number of through holes are opened on the flow limiting plates. The end of piston two (132) away from flow limiting plate two (152) is connected to the inner wall of the outer shell (11) through return spring (14), the end of piston one (131) away from flow limiting plate one (151) is fixedly connected to push rod (12), the other end of push rod (12) passes through the outer shell (11), and flow limiting plate one (151) is fixedly connected to the inner wall of the outer shell (11); The cam-type connector (2) is fixedly connected to the car door hinge, and the cam-type connector (2) corresponds to the electronically controlled damping mechanism (1).

2. The automobile door safety opening device according to claim 1, characterized in that: The electronic control unit (3) consists of a radar (31), a control unit (32), a motor (33), and a door lock sensor (34). The control unit (32) receives the door opening signal issued by the door lock sensor (34), activates the radar (31) to monitor the information around the vehicle, and controls the rotation angle of the motor (33) according to the feedback information from the radar (31).

3. The automobile door safety opening device according to claim 1, characterized in that: The outer end of the outer shell (11) away from the push rod (12) is provided with a cavity, the motor (33) is located inside the cavity, and the output axis of the motor (33) extends outward, penetrating the outer wall of the outer shell (11) and the piston (132) and the flow limiting plate (152) are coaxially fixed.

4. The automobile door safety opening device according to claim 2, characterized in that: An oil seal is provided at the connection between the output shaft of the motor (33) and the piston (132).

5. A car door safety opening device according to claim 1, characterized in that: Elastic sealing rings are provided at the positions where the piston one (131), piston two (132) and flow limiting plate two (152) contact the inner wall of the outer shell (11).

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