CN208277992U - A kind of automatic emergency rear - Google Patents

Abstract

The utility model discloses a kind of automatic emergency rears, comprising: vehicle frame, driving mechanism, rear bumper and control device；The driving mechanism is mounted on the vehicle frame, and is sequentially connected with the rear bumper, and the control device and the driving mechanism are electrically connected.The utility model provides a kind of automatic emergency rear, using electromechanical integration technology not only can when guaranteeing to collide front vehicle safety, but also the passability of vehicle can be improved, and protect vehicle in normally travel, rear is hardly damaged；When own vehicle vehicle reduces its speed or parking, or when the high-speed motions such as rear car or suddenly accelerate cause to knock into the back when whole device starting, and the warning against danger to collide with rear car is provided to driver, and operates rear bumper and is down to operating position, to reduce the extent of injury of collision accident.

Description

A kind of automatic emergency rear

Technical field

The utility model relates to technical field of vehicle safety, more particularly to a kind of automatic emergency rear protecting dress It sets.

Background technique

Currently, the research about heavy vehicle rear both at home and abroad, is based primarily upon Purely mechanical rear, it is pure Mechanical rear and heavy goods vehicles Rear frame are rigid connection, not only influence the passability of heavy goods vehicles, and can be because of vehicle The damage for causing rear is sailed in severe ground uplink, not can guarantee its good safeguard function.Further, since heavy goods vehicles Rear protecting it is higher apart from ground, in car or wait the vehicle of types and when heavy goods vehicles knock into the back, be easy to cause car or Equal vehicles " pierce " heavy goods vehicles rear overhang part, cause biggish traffic accident.

Although the adjustable vehicle rear protecting based on electromechanical integration having been developed that at present, its higher cost, weight Larger, practicability and durability are poor, are not easy universal and promote.

Therefore, how a kind of raising trafficability is provided, guarantees front vehicle safety, and durable, it is at low cost The problem of honest and clean automatic emergency rear is those skilled in the art's urgent need to resolve.

Utility model content

In view of this, the present invention provides a kind of automatic emergency rears, both using electromechanical integration technology Can when guaranteeing collision front vehicle safety, and the passability of vehicle can be improved, and protect vehicle in normally travel, Its rear is hardly damaged；When own vehicle vehicle reduces its speed or parking, or when high-speed motions such as rear cars or suddenly Whole device starting when acceleration causes to knock into the back, and the warning against danger to collide with rear car is provided to driver, and grasp It is down to operating position as rear bumper, to reduce the extent of injury of collision accident.

To achieve the goals above, the utility model adopts the following technical solution:

A kind of automatic emergency rear, including vehicle frame, driving mechanism, rear bumper and control device；The driving Mechanism is mounted on the vehicle frame, and is sequentially connected with the rear bumper, the control device and driving mechanism electricity Property connection；

Wherein the vehicle frame includes: right vertical beam, back shroud, left stringer and front shroud；The wherein right vertical beam and the left side The notch that two notches are respectively set on stringer, and are arranged on the right vertical beam and it is arranged on the left stringer described Notch is correspondingly arranged two-by-two；The right end of the back shroud and the front shroud is respectively charged into two notches of the right vertical beam Interior, the left end of the back shroud and the front shroud is respectively charged into two notches of the left stringer, the right vertical beam, The left stringer, the back shroud and the front shroud constitute rectangular frame structural member；

The rear bumper includes Y type fork seat and bumper rail；The both ends of the bumper rail are respectively fixedly connected with State Y type fork seat；

The driving mechanism includes: stepper motor, sliding block, slideway, transmission mechanism, rear guarantor's bracket and Y type fork seat；Wherein institute The two sides that slideway is fixed at the left stringer and the right vertical beam tail portion are stated, described sliding block one end is matched with the slideway It closes, the other end is fixedly connected by rear guarantor's bracket with the Y type fork seat；The stepper motor by transmission mechanism with it is described Bracket transmission connection is protected afterwards；The stepper motor is mounted on the front shroud；

Control device includes: vehicle speed sensor, radar sensor, central controller, electric machine controller and warning device；Institute Vehicle speed sensor, radar sensor, electric machine controller and warning device is stated to be electrically connected with the central controller；The electricity Machine controller and the stepper motor are electrically connected, after the stepper motor receives the execution action signal of the electric machine controller The stepper motor is rotated, two bumper rails is synchronized after transmission mechanism transmission and moves up and down；The thunder It is fixed between two bumper rails up to sensor by the fixed bracket of radar；The vehicle speed sensor is mounted on vehicle change In fast device shell, detection output shaft of gear-box revolving speed obtains speed.

A kind of automatic emergency protective device intensity provided by the utility model is higher, and sturdy and durable, the service life is permanent；Mechanism is set Meter rationally, is driven efficient stable, and have preferable collision energy-absorbing effect, so as to guarantee occupant to a greater extent Safety；It ensure that vehicle has good passability simultaneously.

Preferably, in a kind of above-mentioned automatic emergency rear, the right vertical beam and the left stringer and it is described after The lap-joint of cover board and the front cover board ends is connected and fixed using riveting method.

Preferably, in a kind of above-mentioned automatic emergency rear, the slideway, which passes through, to be located at the bolt of its surrounding and connects Joint chair is fixedly connected with the left stringer and right vertical beam.

Preferably, in a kind of above-mentioned automatic emergency rear, T-type sliding slot, the cunning are provided in the slideway Block be it is I-shaped, sliding block setting can slide up and down in the T-type sliding slot, and under outer power drive, the T-type Sliding slot and the sliding block are capable of forming firm cooperation.

Preferably, in a kind of above-mentioned automatic emergency rear, it is ladder plate structure that bracket is protected after described, and Bracket side is protected after described is provided with transmission teeth.

Preferably, in a kind of above-mentioned automatic emergency rear, the transmission mechanism includes: first order helical gear Group, second level bevel gear set, the first transmission shaft, second driving shaft and worm screw；First transmission shaft and the stepper motor Torque output shaft is attached by shaft coupling, and the first order bevel gear set is arranged in first transmission shaft and described second Transmission between centers is driven, and first transmission shaft is vertically arranged with second transmission；Helical gear setting in the second level exists It is driven between second driving shaft and the worm screw, the worm screw is mounted on the stringer by bracket vertical, passes through peace Tapered roller bearing on the bracket carries out axially position；The worm axis and the rear support motion direction of protecting are put down Row, the worm screw and the rear transmission teeth for protecting bracket side cooperate, and slow down increases torque drive, protect after driving is described Bracket moves up and down；Worm screw 15 carries out axially position by the tapered roller bearing being mounted on bracket

Preferably, in a kind of above-mentioned automatic emergency rear, the stepper motor passes through the spiral shell for being located at its surrounding Joint chair is tethered to be mounted on the front shroud.

A kind of method of automatic emergency rear protecting, comprising the following steps:

Step 1: vehicle speed sensor and radar sensor receive own vehicle information and rear car detection information；

Step 2: central controller is detected from vehicle speed sensor and the received own vehicle information of radar sensor and rear car In information, v is sought₁、v₂、a₁、a₂、v_relAnd D；Instantaneous distance of the D between two vehicles, v₁For own vehicle speed, v₂For rear vehicle speed； Central controller acquires own vehicle acceleration a by taking the velocity amplitude of interval time point to be calculated respectively₁With rear car acceleration a₂； v_relFor relative velocity, v_rel=v₂- v₁；

Step 3: the v that central controller is acquired₁、v₂、a₁、a₂And v_relIt substitutes into critical safe distance calculation formula, asks Obtain critical safe distance d_br；

Step 4: the critical safe distance d that will be acquired in step 3_brIt is compared with the D acquired in step 2, judges whether possibility Collision, whether decision movement triggers, as D≤1.5d_brWhen, central controller sending command signal to warning device carries out alarm and mentions Awake driver suitably accelerates；As D≤d_brWhen, central controller issues instructions to electric machine controller, and electric machine controller controls motor Rotation is reduced and is endangered caused by rear-end collision so that rear bumper be driven to decline rapidly.

Preferably, in a kind of above-mentioned automatic emergency rear defence maintaining method, critical safe distance calculation formula are as follows:v_rel>v₁, in formula: d_br=0, v_rel ≤0；d_br=(t₁+t₂)v_rel+d₀, 0 < v_rel≤v₁；t₁、t₂Respectively system delay time and rear bumper from start to work to Up to the time of operating position, d_nFor safe stopping distance, normal condition can take d_n=3m.

Preferably, in a kind of above-mentioned automatic emergency rear defence maintaining method, radar sensor send radar signal and receive from The back wave of rear car reflection detects the information of vehicles of above-mentioned rear car；It is calculated if the fore-and-aft distance of own vehicle with the rear car is less than Critical safe distance, and less than half lane width of the lateral distance of own vehicle and rear car, then it can be assumed that rear car and own parking stall In same lane, if above-mentioned judging result within calculated above-mentioned safe distance, and above-mentioned rear car and own vehicle laterally away from From less than half of lane width, that is, rear car and own parking stall, in same lane, then central controller issues instructions to electric machine controller, Electric machine controller controls stepper motor rotation, so that rear bumper be driven to decline rapidly, reduces and endangers caused by rear-end collision.

It can be seen via above technical scheme that compared with prior art, the utility model disclose provide it is a kind of automatic tight Anxious rear, using electromechanical integration technology not only can when guaranteeing to collide front vehicle safety, but also vehicle can be improved Passability, and protect vehicle in normally travel, rear is hardly damaged；When own vehicle vehicle reduce its speed or When parking, or when the high-speed motions such as rear car or whole device starting when accelerating to cause to knock into the back suddenly, and to driver The warning against danger to collide with rear car is provided, and operates rear bumper and is down to operating position, to reduce the harm of collision accident Degree；

The utility model is sturdy and durable, and the service life is permanent, and mechanism design rationally, is driven efficient stable, and has preferable Collision energy-absorbing effect, so as to guarantee the safety of occupant to a greater extent；It is good logical to ensure that vehicle has simultaneously The property crossed.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to the attached drawing of offer.

Fig. 1 attached drawing is the structural schematic diagram of the utility model；

Fig. 2 attached drawing is assembling schematic diagram of the invention；

Fig. 3 attached drawing is the structural schematic diagram of vehicle frame；

Fig. 4 attached drawing is the structural framing figure of control device；

Fig. 5 attached drawing is control flow chart in a kind of automatic emergency rear defence maintaining method；

Fig. 6 attached drawing is equivalent stress figure when common rear bumper gradually applies external applied load；

Fig. 7 attached drawing gradually applies equivalent stress figure when external applied load for rear bumper in the utility model；

Fig. 8 attached drawing is equivalent strain figure when common rear bumper gradually applies external applied load；

Fig. 9 attached drawing gradually applies equivalent strain figure when external applied load for rear bumper in the utility model.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

The utility model embodiment discloses a kind of automatic emergency rear, uses electromechanical integration technology both can be with The safety of front vehicle when guaranteeing collision, and the passability of vehicle can be improved, and protect vehicle in normally travel, thereafter Protective device is hardly damaged；When own vehicle vehicle reduces its speed or parking, or when the high-speed motions such as rear car or acceleration suddenly Whole device starts when causing to knock into the back, and the warning against danger to collide with rear car is provided to driver, and after operation Bumper is down to operating position, to reduce the extent of injury of collision accident.

In conjunction with attached drawing 1-4, the utility model discloses a kind of automatic emergency rears, including vehicle frame 1, driving mechanism 3, rear bumper 2 and control device；Driving mechanism 3 is mounted on vehicle frame 1, and is sequentially connected with rear bumper 2, control device It is electrically connected with driving mechanism 3；

Wherein vehicle frame 1 includes: right vertical beam 4, back shroud 6, left stringer 5 and front shroud 7；Wherein on right vertical beam 4 and left stringer 5 Two notches are respectively set, and the notch being arranged on right vertical beam 4 and the notch being arranged on left stringer 5 are correspondingly arranged two-by-two；Afterwards The right end of cover board 6 and front shroud 7 is respectively charged into two notches of right vertical beam 4, and back shroud 6 and the left end of front shroud 7 fill respectively Enter in two notches of left stringer 5, right vertical beam 4, left stringer 5, back shroud 6 and front shroud 7 constitute rectangular frame structural member；

Rear bumper 2 includes Y type fork seat 11 and bumper rail 12；The both ends of bumper rail 12 have been respectively fixedly connected with Y type Forked standard 11；

Driving mechanism 3 includes: stepper motor 17, sliding block 9, slideway 10, transmission mechanism, rear guarantor's bracket 8 and Y type fork seat 11； Its middle slideway 10 is fixed at the two sides of 4 tail portion of left stringer 5 and right vertical beam, and 9 one end of sliding block is cooperated with slideway 10, another End is protected bracket 8 after passing through and is fixedly connected with Y type fork seat 11；Stepper motor 17 is sequentially connected by transmission mechanism and rear bracket 8 of protecting； Stepper motor 17 is mounted on front shroud 7；

Control device includes: vehicle speed sensor 20, radar sensor 21, central controller 22, electric machine controller 23 and report Alarm device 24；Vehicle speed sensor 20, radar sensor 21, electric machine controller 23 and warning device 24 are electric with central controller 22 Property connection；Electric machine controller 23 and stepper motor 17 are electrically connected, and the reception electric machine controller 23 of stepper motor 17 executes movement It rotates stepper motor 17 after signal, synchronizes two bumper rails 12 after transmission mechanism is driven and move up and down；Radar sensing Device 21 is fixed between two bumper rails 12 by the fixed bracket 25 of radar；Vehicle speed sensor 20 is mounted on transmission for vehicles shell Interior, detection output shaft of gear-box revolving speed obtains speed.

In order to further optimize the above technical scheme, right vertical beam 4 and left stringer 5 and back shroud 6 and 7 both ends of front shroud are taken The place of connecing is connected and fixed using riveting method.

In order to further optimize the above technical scheme, slideway 10 passes through the bolt joint seat and left stringer 5 positioned at its surrounding It is fixedly connected with right vertical beam 4.

In order to further optimize the above technical scheme, T-type sliding slot is provided in slideway 10, sliding block 9 is I-shaped, sliding block 9 Setting can slide up and down in T-type sliding slot, and under outer power drive, and T-type sliding slot is capable of forming firm match with sliding block 9 It closes.

In order to further optimize the above technical scheme, protecting bracket 8 afterwards is ladder plate structure, and protects 8 side of bracket afterwards It is provided with transmission teeth 19.

In order to further optimize the above technical scheme, transmission mechanism includes: first order bevel gear set 13, second level helical gear The 14, first transmission shaft 15 of group, second driving shaft 16 and worm screw 18；The torque output shaft of first transmission shaft 15 and stepper motor 17 is logical Shaft coupling to be crossed to be attached, the setting of first order bevel gear set 13 is driven between the first transmission shaft 15 and second driving shaft 16, And the first transmission shaft 15 is vertically arranged with the second transmission；The setting of second level helical gear 14 second driving shaft 16 and worm screw 18 it Between be driven, worm screw 18 is mounted on stringer by bracket vertical, is passed through the tapered roller bearing that is mounted on bracket and is carried out Axially position；18 axis of worm screw is parallel with rear guarantor's 8 direction of motion of bracket, worm screw 18 and the rear transmission teeth 19 for protecting 8 side of bracket Cooperation, slow down increases torque drive, and bracket 8 is protected after driving and is moved up and down；Worm screw 15 passes through the circular cone that is mounted on bracket Roller bearing carries out axially position.

In order to further optimize the above technical scheme, stepper motor 17 is mounted on by being located at the bolt joint seat of its surrounding On front shroud 7.

A kind of method of automatic emergency rear protecting, comprising the following steps:

Step 1: vehicle speed sensor and radar sensor receive own vehicle information and rear car detection information；

Step 2: central controller is detected from vehicle speed sensor and the received own vehicle information of radar sensor and rear car In information, v is sought₁、v₂、a₁、a₂、v_relAnd D；Instantaneous distance of the D between two vehicles, v₁For own vehicle speed, v₂For rear vehicle speed； Central controller acquires own vehicle acceleration a by taking the velocity amplitude of interval time point to be calculated respectively₁With rear car acceleration a₂； v_relFor relative velocity, v_rel=v₂- v₁；

Step 3: the v that central controller is acquired₁、v₂、a₁、a₂And v_relIt substitutes into critical safe distance calculation formula, asks Obtain critical safe distance d_br；

Step 4: the critical safe distance d that will be acquired in step 3_brIt is compared with the D acquired in step 2, judges whether possibility Collision, whether decision movement triggers, as D≤1.5d_brWhen, central controller sending command signal to warning device carries out alarm and mentions Awake driver suitably accelerates；As D≤d_brWhen, central controller issues instructions to electric machine controller, and electric machine controller controls motor Rotation is reduced and is endangered caused by rear-end collision so that rear bumper be driven to decline rapidly.

In order to further optimize the above technical scheme, critical safe distance calculation formula are as follows:v_rel>v₁, in formula: d_br=0, v_rel ≤0；d_br=(t₁+t₂)v_rel+d₀, 0 < v_rel≤v₁；t₁、t₂Respectively system delay time and rear bumper from start to work to Up to the time of operating position, d_nFor safe stopping distance, normal condition can take d_n=3m.

In order to further optimize the above technical scheme, radar sensor transmission radar signal and reception are reflected anti-from rear car Ejected wave detects the information of vehicles of above-mentioned rear car；If the fore-and-aft distance of own vehicle with the rear car be less than calculated criticality safety away from From, and less than half lane width of the lateral distance of own vehicle and rear car, then it can be assumed that rear car and own parking stall are in same lane, if Above-mentioned judging result is within calculated above-mentioned safe distance, and less than half lane of lateral distance of above-mentioned rear car and own vehicle Width, that is, rear car and own parking stall are in same lane, then central controller issues instructions to electric machine controller, electric machine controller control Stepper motor rotation is reduced and is endangered caused by rear-end collision so that rear bumper be driven to decline rapidly.

Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part It is bright.

The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest scope consistent with features of novelty.

Claims (7)

1. a kind of automatic emergency rear characterized by comprising vehicle frame, driving mechanism, rear bumper and control dress It sets；The driving mechanism is mounted on the vehicle frame, and with the rear bumper be sequentially connected, the control device with it is described Driving mechanism is electrically connected；

Wherein the vehicle frame includes: right vertical beam, back shroud, left stringer and front shroud；The wherein right vertical beam and the left stringer On two notches are respectively set, and are arranged on the right vertical beam the notch and the notch being arranged on the left stringer It is correspondingly arranged two-by-two；The right end of the back shroud and the front shroud is respectively charged into two notches of the right vertical beam, The left end of the back shroud and the front shroud is respectively charged into two notches of the left stringer, the right vertical beam, institute It states left stringer, the back shroud and the front shroud and constitutes rectangular frame structural member；

The rear bumper includes Y type fork seat and bumper rail；The both ends of the bumper rail have been respectively fixedly connected with the Y type Forked standard；

The driving mechanism includes: stepper motor, sliding block, slideway, transmission mechanism, rear guarantor's bracket and Y type fork seat；The wherein cunning Road is fixed at the two sides of the left stringer and the right vertical beam tail portion, and described sliding block one end is cooperated with the slideway, The other end is fixedly connected by rear guarantor's bracket with the Y type fork seat；The stepper motor by transmission mechanism and it is described after Protect bracket transmission connection；The stepper motor is mounted on the front shroud；

Control device includes: vehicle speed sensor, radar sensor, central controller, electric machine controller and warning device；The vehicle Fast sensor, radar sensor, electric machine controller and warning device are electrically connected with the central controller；The motor control Device processed and the stepper motor are electrically connected, and the stepper motor makes institute after receiving the execution action signal of the electric machine controller Stepper motor rotation is stated, two bumper rails is synchronized after transmission mechanism transmission and moves up and down；The radar passes Sensor is fixed between two bumper rails by the fixed bracket of radar；The vehicle speed sensor is mounted on transmission for vehicles In shell, detection output shaft of gear-box revolving speed obtains speed.

2. a kind of automatic emergency rear according to claim 1, which is characterized in that the right vertical beam and the left side The lap-joint of stringer and the back shroud and the front cover board ends is connected and fixed using riveting method.

3. a kind of automatic emergency rear according to claim 1, which is characterized in that the slideway is by being located at it The bolt joint seat of surrounding is fixedly connected with the left stringer and right vertical beam.

4. a kind of automatic emergency rear according to claim 3, which is characterized in that be provided with T in the slideway Type sliding slot, the sliding block be it is I-shaped, sliding block setting can carry out in the T-type sliding slot, and under outer power drive Lower slider.

5. a kind of automatic emergency rear according to claim 1, which is characterized in that protecting bracket after described is ladder Plate structure, and the rear bracket side of protecting is provided with transmission teeth.

6. a kind of automatic emergency rear according to claim 5, which is characterized in that the transmission mechanism includes: First order bevel gear set, second level bevel gear set, the first transmission shaft, second driving shaft and worm screw；First transmission shaft and institute The torque output shaft for stating stepper motor is attached by shaft coupling, and the first order bevel gear set setting is in first transmission It is driven between axis and the second driving shaft, and first transmission shaft is vertically arranged with second transmission；The second level Helical gear setting is driven between second driving shaft and the worm screw, and the worm screw is mounted on described vertical by bracket vertical Liang Shang carries out axially position by the tapered roller bearing being mounted on the bracket；The axis of the worm screw and the rear guarantor Support motion direction is parallel, and the worm screw and the rear transmission teeth for protecting bracket side cooperate, and slow down increases torque biography It is dynamic, drive the rear bracket of protecting to move up and down；Worm screw 15 carries out axially position by the tapered roller bearing being mounted on bracket.

7. a kind of automatic emergency rear according to claim 1, which is characterized in that the stepper motor passes through position It is mounted on the front shroud in the bolt joint seat of its surrounding.