A car speed sensing type drawer anti-collision bumper device

Abstract

The application provides a vehicle speed sensing type drawer anti-collision bumper device, which comprises a fixed base, the inner side wall of the fixed base is symmetrically fixedly connected with two guide sliding rails, a drawer type telescopic anti-collision rod is slidably connected between the two guide sliding rails, the drawer type telescopic anti-collision rod is covered with an outer layer of flexible soft package on one side, the fixed base and the drawer type telescopic anti-collision rod are locked through an electronic lock mechanism, springs are symmetrically fixedly connected between the fixed base and the drawer type telescopic anti-collision rod, the springs are arranged outside hydraulic buffers, and a collision speed sensor and a controller are mounted in the fixed base. The built-in collision speed sensor and the controller are used for automatically triggering the electronic lock to release the anti-collision rod only when the vehicle collision speed is greater than 20km / h, and the anti-collision rod is kept in the retracted state when the low-speed collision (≤20km / h) occurs, so that frequent actions are avoided, and the device is reasonable, practical, active, safe and long in service life.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and in particular to a speed-sensing drawer anti-collision bumper device. Background Technology

[0002] Currently, most traditional car bumpers are fixed structures, typically containing energy-absorbing foam or thin-walled metal energy-absorbing boxes, with generally short buffer travel (usually within the range of 50-100mm). In medium-to-high-speed collisions (e.g., speeds exceeding 20km / h), due to insufficient buffer distance, a rigid, hard-on impact can easily occur between the bumper and the obstacle, preventing the collision energy from being effectively absorbed and dispersed. This can lead to irreversible deformation of structural components such as the vehicle's longitudinal beams and radiator frame, increasing repair costs. Simultaneously, the severe deceleration impact also poses a high risk of injury to the head, neck, and chest of occupants, demonstrating limited safety protection capabilities.

[0003] To address these issues, several active or pop-out bumper technologies have been proposed. For example, some solutions use radar or camera-based pre-collision detection to drive the bumper to extend outwards. However, these solutions typically rely on complex sensing systems (such as millimeter-wave radar and vision sensors), resulting in high costs, susceptibility to adverse weather conditions, and unclear trigger speed thresholds. Furthermore, the extension mechanisms are often driven by single-stage cylinders or motors, leading to slow response times and limited buffer strokes (usually no more than 150mm).

[0004] Therefore, developing a new type of anti-collision device that can be automatically triggered according to the collision speed, has an ultra-long buffer stroke, a composite energy absorption structure with internal rigidity and external flexibility, and is structurally reliable and cost-controllable is of great practical significance. To this end, a vehicle speed sensing drawer anti-collision bumper device is proposed. Summary of the Invention

[0005] In view of this, the present invention provides a vehicle speed-sensing drawer anti-collision bumper device to solve or alleviate one of the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0006] The technical solution of this invention is implemented as follows: A speed-sensing drawer-type anti-collision bumper device includes a fixed base. Two guide rails are symmetrically fixedly connected to the inner side wall of the fixed base. A drawer-type telescopic anti-collision bar is slidably connected between the two guide rails. One side of the drawer-type telescopic anti-collision bar is covered with an outer flexible soft pad. The fixed base and the drawer-type telescopic anti-collision bar are locked together by an electronic locking mechanism. Springs are symmetrically fixedly connected between the fixed base and the drawer-type telescopic anti-collision bar. The springs are sleeved on the outside of the hydraulic buffer. A collision speed sensor and a controller are installed inside the fixed base.

[0007] A further preferred embodiment: the drawer-type telescopic anti-collision bar is made of 5mm thick, 1500MPa U-shaped channel steel.

[0008] A further preferred embodiment: the signal output terminal of the collision speed sensor is connected to the signal input terminal of the controller.

[0009] A further preferred embodiment: the electrical output terminal of the controller is electrically connected to the electrical input terminal of the electronic locking mechanism. When the collision speed sensor detects a collision speed greater than 20 km / h, the controller controls the electronic locking mechanism to unlock.

[0010] A further preferred embodiment: the outer flexible pouch is a high-density flexible buffer layer with a thickness of 10mm.

[0011] A further preferred embodiment: the spring is a pre-compressed pop-out spring, used to instantly push the drawer-type telescopic anti-collision bar outward along the guide rail after the electronic locking mechanism is unlocked.

[0012] A further preferred embodiment: the spring and the hydraulic damper together constitute a spring-hydraulic composite damper, wherein the spring is used for rapid ejection, and the hydraulic damper is used for linear energy absorption and buffering during collision.

[0013] Further preferred: the device can be installed on the front bumper, rear bumper, and retractable step area below the left and right doors of the vehicle to achieve all-round collision protection in the front, rear, and sides of the vehicle.

[0014] The embodiments of the present invention have the following advantages due to the adoption of the above technical solutions: I. This invention uses a built-in collision speed sensor and controller to automatically trigger the electronic latch to release the anti-collision bar only when the vehicle collision speed is greater than 20km / h; it remains in the retracted state during low-speed collisions (≤20km / h), avoiding frequent actions. It is both reasonable and practical, taking into account both active safety and component lifespan.

[0015] Second, the anti-collision bar of this invention can extend to a distance of 300mm, far exceeding the buffer distance of traditional bumpers. During a collision, the vehicle body achieves a longer deceleration displacement with the obstacle, reducing the peak impact force, suppressing vehicle body structural deformation, and reducing maintenance costs.

[0016] Third, the main body of the anti-collision bar of this invention is made of 5mm thick, 1500MPa ultra-high strength steel, which has excellent bending and impact resistance; the outside is covered with 10mm high-density flexible soft padding to achieve flexible contact in the initial stage of collision, avoid rigid hard collision, protect the vehicle's own structure and reduce damage to the object being hit.

[0017] Fourth, this invention can be flexibly installed on the front bumper, rear bumper, and retractable pedal area below the left and right doors of a vehicle to achieve all-round protection against front and rear collisions and side collisions, thereby improving the passive safety level of the entire vehicle.

[0018] V. The triggering system of this invention consists only of a collision speed sensor, a controller and an electronic latch, without the need for expensive peripherals such as radar / cameras, and has extremely low power consumption; the mechanical parts are mainly made of high-strength steel stampings, standard springs and hydraulic buffers, and the manufacturing and maintenance costs are controllable, making it suitable for mass application.

[0019] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of the extended state of the present invention; Figure 2 This is a diagram of the internal structure of the fixing base of the present invention; Figure 3 This is a structural diagram of the contracted state of the present invention; Figure 4 This is a cross-sectional view of the drawer-type telescopic anti-collision bar of the present invention.

[0022] Reference numerals in the attached diagram: 1. Fixed base; 2. Guide rail; 3. Drawer-type telescopic anti-collision bar; 4. Outer flexible soft padding; 5. Electronic locking mechanism; 6. Spring; 7. Hydraulic buffer; 8. Collision speed sensor; 9. Controller; 10. LiDAR. Detailed Implementation

[0023] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0024] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] like Figures 1 to 4As shown, this embodiment of the invention provides a speed-sensing drawer-type anti-collision bumper device, including a fixed base 1. Two guide rails 2 are symmetrically fixedly connected to the inner wall of the fixed base 1. A drawer-type telescopic anti-collision bar 3 is slidably connected between the two guide rails 2. One side of the drawer-type telescopic anti-collision bar 3 is covered with an outer flexible padded layer 4. The fixed base 1 and the drawer-type telescopic anti-collision bar 3 are locked together by an electronic locking mechanism 5. Springs 6 are symmetrically fixedly connected between the fixed base 1 and the drawer-type telescopic anti-collision bar 3, and the springs 6 are sleeved on the outside of a hydraulic buffer 7. A collision speed sensor 8 and a controller 9 are installed inside the fixed base 1, and a lidar 10 is installed on the fixed base 1.

[0026] In this embodiment, specifically: the drawer-type telescopic anti-collision bar 3 is made of 5mm thick, 1500MPa U-shaped channel steel. This material has extremely high impact and bending resistance, and is not prone to plastic deformation during a collision. The cross-section of the drawer-type telescopic anti-collision bar 3 has an inner rigid and outer flexible structure. The inner layer is 5mm thick, 1500MPa ultra-high strength steel providing rigid support, and the outer layer is a 10mm high-density outer flexible soft pad 4 providing contact flexibility. This structure can ensure that the anti-collision bar itself does not bend and fail during a collision, and can also reduce damage to obstacles (such as pedestrians and other vehicles), achieving dual protection for people and vehicles. The high-density outer flexible soft pad 4 acts as a soft collision buffer when cars collide, avoiding a hard collision between the two vehicles, thereby increasing the protection of both vehicles. The lidar 10 is used for active collision sensing. When the lidar 10 senses a vehicle collision, it actively triggers the anti-collision device. This device can be installed around the vehicle. When installed at the front or rear, it is located on the bumper; when installed on the left or right, it is located under the left and right doors, similar to the foot pedal position. Before installation, the corresponding installation position needs to be designed on the vehicle chassis to integrate the device into the chassis structure. Through the force of the 1500 MPa anti-collision bar and the high-density sponge covering it, it plays a role in preventing collisions. In the event of a head-on collision at a speed exceeding 20 km / h, the front, rear, left, and right lidars can sense the triggering device and actively extend to prevent damage from the collision.

[0027] In this embodiment, specifically: the outer flexible soft package 4 is a high-density flexible buffer layer with a thickness of 10mm. This soft package makes initial contact with the obstacle during the initial stage of the collision, achieving flexible contact, avoiding rigid hard-hitting collisions, and reducing damage to both the colliding object and itself.

[0028] In this embodiment, specifically: spring 6 is a pre-compressed pop-out spring, used to instantly push the drawer-type telescopic anti-collision bar 3 outward along the guide rail 2 after the electronic locking mechanism 5 is unlocked. Spring 6 and hydraulic buffer 7 together constitute a spring-hydraulic composite buffer, where spring 6 is used for rapid pop-out, and hydraulic buffer 7 is used for linear energy absorption and buffering during collision. Hydraulic buffer 7 is a coaxial shock absorber structure, which is equipped with hydraulic oil and a throttle valve inside. When the piston rod is compressed, the hydraulic oil generates damping force through the throttle orifice, and the damping force changes linearly with the compression speed, thereby achieving uniform energy absorption and preventing hard impact to the bottom during collision.

[0029] In this embodiment, specifically: the signal output terminal of the collision speed sensor 8 is connected to the signal input terminal of the controller 9. The electrical output terminal of the controller 9 is electrically connected to the electrical input terminal of the electronic locking mechanism 5. When the collision speed sensor 8 detects a collision speed greater than 20 km / h, the controller 9 controls the electronic locking mechanism 5 to unlock.

[0030] In this embodiment, the collision speed sensor 8 further employs a MEMS accelerometer, with its sensitive axis direction aligned with the vehicle's expected collision direction (X-axis for front-to-back, Y-axis for lateral). The sensor is rigidly mounted on the inner side of the fixed base 1 to ensure that the detected acceleration signal accurately reflects the vehicle's collision intensity, avoiding false triggering caused by non-collision vibrations such as road noise or flying stones.

[0031] In this embodiment, specifically: when a vehicle collision occurs and the speed is greater than 20 km / h, the device automatically operates in the following sequence: Triggering phase: When the collision speed sensor 8 detects the deceleration signal, the controller 9 determines that the equivalent collision speed exceeds 20km / h and immediately outputs an unlocking signal to the electronic locking mechanism 5; Pop-out stage: The electronic locking mechanism 5 is released, and the pre-compressed spring 6 pushes the drawer-type telescopic anti-collision bar 3 to pop outward in a straight line 300mm along the guide rail 2 within a few milliseconds; Flexible contact stage: The outer flexible soft package 4 at the front end of the drawer-type telescopic anti-collision bar 3 first contacts the obstacle, and the initial flexible buffer is achieved by using 10mm high-density flexible material; Energy absorption and compression phase: Subsequently, the drawer-type telescopic anti-collision bar 3 is subjected to the reaction force of the obstacle and retracts inward. At this time, the hydraulic buffer 7 provides linear damping, which, together with the spring 6, absorbs the collision energy, so that the collision force is smoothly attenuated and the instantaneous impact peak is prevented from being transmitted to the longitudinal beam of the vehicle body.

[0032] In this embodiment, specifically, the pop-out stroke of the drawer-type telescopic bumper 3 is 300mm. When the electronic locking mechanism 5 is unlocked, the spring 6 instantly pushes the drawer-type telescopic bumper 3 outward 300mm along the guide rail 2, so that the outer flexible soft padding 4 at the front end of the drawer-type telescopic bumper 3 contacts the obstacle in advance, thereby obtaining a buffer distance much longer than that of a traditional bumper.

[0033] In this embodiment, specifically: the device can be installed on the front bumper, rear bumper, and retractable step areas below the left and right doors of a vehicle to achieve all-around collision protection in the front, rear, and sides. Each installation location is independently equipped with a fixed base 1, guide rail 2, drawer-type retractable anti-collision bar 3, outer flexible soft padding 4, electronic locking mechanism 5, spring 6, hydraulic buffer 7, collision speed sensor 8, and controller 9. Each set does not interfere with each other and can be triggered independently according to the collision direction.

[0034] When this invention is in operation: Figure 3 As shown, under normal conditions, the drawer-type telescopic anti-collision bar 3 is in the retracted state and is locked in the fixed base 1 by the electronic locking mechanism 5. The spring 6 is in the pre-compressed state, and its appearance is consistent with that of an ordinary bumper.

[0035] When a vehicle collision occurs, the collision speed sensor 8 collects deceleration signals in real time and transmits them to the controller 9. The controller 9 determines the equivalent collision speed: if the collision speed is ≤ 20km / h, the electronic locking mechanism 5 remains locked and the device does not activate; if the collision speed is > 20km / h, the controller 9 immediately outputs an unlocking signal, and the electronic locking mechanism 5 releases instantly.

[0036] After the electronic locking mechanism 5 is unlocked, the pre-compressed spring 6 pushes the drawer-type telescopic anti-collision bar 3 outward in a straight line of 300mm along the two guide rails 2 within milliseconds. The outer flexible soft padding 4 at the front end of the drawer-type telescopic anti-collision bar 3 first contacts the obstacle, achieving flexible initial buffering and avoiding rigid hard collision.

[0037] Subsequently, the drawer-type telescopic anti-collision bar 3 begins to retract inward under the reaction force of the obstacle. At this time, the spring 6 and the hydraulic damper 7 work together: the hydraulic damper 7 provides linear damping, allowing the collision force to decay smoothly; the spring 6 assists in absorbing some energy during the retraction process. Ultimately, the collision energy is efficiently and gently dispersed and absorbed, significantly reducing the peak impact transmitted to the vehicle's longitudinal beams and protecting the vehicle structure and the safety of the occupants.

[0038] After the collision, the drawer-type telescopic anti-collision bar 3 can be pushed back to its original position using external tools or a reset mechanism, the electronic locking mechanism 5 will relock, and the device will return to the ready-to-trigger state.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A vehicle speed-sensing drawer anti-collision bumper device, comprising a fixed base (1), characterized in that: The inner wall of the fixed base (1) is symmetrically fixedly connected to two guide rails (2), and a drawer-type telescopic anti-collision bar (3) is slidably connected between the two guide rails (2). One side of the drawer-type telescopic anti-collision bar (3) is covered with an outer flexible soft pack (4). The fixed base (1) and the drawer-type telescopic anti-collision bar (3) are locked by an electronic locking mechanism (5). A spring (6) is symmetrically fixedly connected between the fixed base (1) and the drawer-type telescopic anti-collision bar (3). The spring (6) is sleeved on the outside of the hydraulic buffer (7). A collision speed sensor (8) and a controller (9) are installed inside the fixed base (1). A laser radar (10) is installed on the fixed base (1).

2. The vehicle speed-sensing drawer anti-collision bumper device according to claim 1, characterized in that: The drawer-type telescopic anti-collision bar (3) is made of 5mm thick, 1500MPa U-shaped channel steel.

3. The vehicle speed-sensing drawer anti-collision bumper device according to claim 1, characterized in that: The signal output terminal of the collision speed sensor (8) is connected to the signal input terminal of the controller (9).

4. The vehicle speed-sensing drawer anti-collision bumper device according to claim 1, characterized in that: The electrical output terminal of the controller (9) is electrically connected to the electrical input terminal of the electronic locking mechanism (5). When the collision speed sensor (8) detects a collision speed greater than 20 km / h, the controller (9) controls the electronic locking mechanism (5) to unlock.

5. A vehicle speed-sensing drawer anti-collision bumper device according to claim 1, characterized in that: The outer flexible soft package (4) is a high-density flexible buffer layer with a thickness of 10mm.

6. The vehicle speed-sensing drawer anti-collision bumper device according to claim 1, characterized in that: The spring (6) is a pre-compressed pop-out spring, which is used to push the drawer-type telescopic anti-collision bar (3) outward along the guide rail (2) instantly after the electronic locking mechanism (5) is unlocked.

7. A vehicle speed-sensing drawer anti-collision bumper device according to claim 1, characterized in that: The spring (6) and the hydraulic buffer (7) together constitute a spring-hydraulic composite buffer, wherein the spring (6) is used for rapid ejection and the hydraulic buffer (7) is used for linear energy absorption buffering during collision.

8. A vehicle speed-sensing drawer anti-collision bumper device according to claim 1, characterized in that: The device can be installed on the front bumper, rear bumper, and retractable step areas below the left and right doors of a vehicle to achieve all-around collision protection in the front, rear, and sides.

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