Vehicle front lower protection and vehicle

Abstract

The invention relates to a vehicle front lower protection device and a vehicle, and the vehicle front lower protection device comprises a cross beam main body which is provided with a monitoring device; the frame fixing support is connected to the cross beam main body through an energy absorption mechanism; the switching mechanism is installed on the energy absorption mechanism, the switching mechanism is in signal connection with the monitoring device, and the switching mechanism is configured to switch the energy absorption mechanism to be in rigid connection with the frame fixing support and the cross beam body when the monitoring device monitors the first protection state; and when the monitoring device monitors the second protection state, the energy absorption mechanism is switched to be elastically connected with the frame fixing support and the cross beam body. The frame fixing support and the cross beam body are connected through the energy absorption mechanism, when the monitoring device installed on the cross beam body monitors the first protection state or the second protection state, the state of the energy absorption mechanism can be switched through the switching mechanism, and the buffering performance of lower protection is improved; the technical problem that lower protection with high strength and rigidity may cause great harm to pedestrians is solved.

Description

Technical Field

[0001] The present application relates to the automotive field, and in particular to a front lower protection for a vehicle and a vehicle. Background Art

[0002] As a protective device for commercial vehicles, the front underbody protection can prevent small vehicles from drilling into the bottom of a commercial vehicle when it rear-ends the vehicle, thereby reducing the severity of the accident and protecting the safety of the people in the vehicle.

[0003] In the related art, the lower guard is usually strengthened to have sufficient blocking force. However, the strength and rigidity of the lower guard are relatively high. When a commercial vehicle collides with a pedestrian or a cyclist, the lower guard with high strength and rigidity may cause greater harm to the pedestrian or the cyclist. Summary of the invention

[0004] The present application provides a vehicle front underguard and a vehicle, which can solve the technical problem in the related art that the strength and rigidity of the underguard are relatively high, and when a commercial vehicle collides with a pedestrian or a cyclist, the underguard with relatively high strength and rigidity may cause great harm to the pedestrian or the cyclist.

[0005] In a first aspect, an embodiment of the present application provides a vehicle front lower protection, comprising: a crossbeam body, on which a monitoring device is installed; a frame fixed support, on which the frame fixed support is connected to the crossbeam body via an energy absorbing mechanism; a switching mechanism, on which the switching mechanism is installed, the switching mechanism being connected to the monitoring device signal, the switching mechanism being configured to switch the energy absorbing mechanism to a rigid connection between the frame fixed support and the crossbeam body when the monitoring device detects a first protection state; and to switch the energy absorbing mechanism to an elastic connection between the frame fixed support and the crossbeam body when the monitoring device detects a second protection state.

[0006] In combination with the first aspect, in one embodiment, the energy absorbing mechanism includes: a support cylinder, which is fixed to the frame fixed support; an energy absorbing cylinder, which is fixed to the beam body, and the energy absorbing cylinder and the support cylinder are plugged into each other, and the support cylinder and the energy absorbing cylinder both extend in an extension direction perpendicular to the beam body; the switching mechanism is installed on the support cylinder or the energy absorbing cylinder, and when the monitoring device detects a first protection state, the switching mechanism limits the mutual sliding of the support cylinder and the energy absorbing cylinder; when the monitoring device detects a second protection state, the switching mechanism cancels the restriction on the energy absorbing cylinder and the support cylinder.

[0007] In combination with the first aspect, in one embodiment, the switching mechanism includes a driving member and a limiting member connected to the driving member; the vehicle front lower protection also includes a controller, the controller is connected to the monitoring device signal, and the driving member signal is connected to the controller; the controller is used to control the driving member to drive the limiting member to be inserted into the support tube and the energy absorbing tube to fix the support tube and the energy absorbing tube when the monitoring device detects a first protection state; when the monitoring device detects a second protection state, the driving member is controlled to drive the limiting member to retract the support tube or the energy absorbing tube.

[0008] In combination with the first aspect, in one embodiment, the limit member includes: a cam, which is installed in the cavity of the energy absorbing cylinder or the support cylinder, and the cam is connected to the driving member; a locking pin, which is installed on the peripheral side of the cam, and the driving member is configured to drive the cam to rotate around the axis of the energy absorbing cylinder, so that the cam drives the locking pin to be inserted into the support cylinder and the energy absorbing cylinder, or to retract the locking pin from the support cylinder or the energy absorbing cylinder.

[0009] In combination with the first aspect, in one embodiment, the energy absorbing mechanism further includes an elastic device, and the elastic device is installed between the cross beam body and the frame fixing support.

[0010] In combination with the first aspect, in one embodiment, the frame fixing support is provided with a limiting hole; the elastic device includes a connecting column, the connecting column extends along the axial direction of the energy absorbing cylinder, one end of the connecting column is fixed to the cross beam body, and the other end passes through the limiting hole; the connecting column is penetrated by a first elastic member, and the first elastic member is located between the frame fixing support and the cross beam body.

[0011] In combination with the first aspect, in one embodiment, the vehicle front lower protection also includes a crush energy absorbing device, which is installed on the cross beam body, the crush energy absorbing device is connected to the frame fixed support, and the crush energy absorbing device and the energy absorbing mechanism are spaced apart along the extension direction of the cross beam body.

[0012] In combination with the first aspect, in one embodiment, the vehicle front lower protection also includes a fixed support plate, which is connected to the frame fixed support, and the fixed support plate is provided with a through-tube hole; the crush energy absorbing device includes a crush energy absorbing box, one end of the crush energy absorbing box is fixed to the cross beam body, and the other end is passed through the through-tube hole and fixed to the fixed support plate, and an elastic energy absorbing component is passed through the crush energy absorbing box.

[0013] In combination with the first aspect, in one embodiment, a mounting plate is fixed in the cavity of the crush energy absorbing box, and the mounting plate is provided with an axis hole; a limiting plate is fixed to the fixed support plate near the through-tube hole, and the limiting plate is provided with a movable hole; the elastic energy absorbing component includes a connecting shaft, and the connecting shaft extends along the axial direction of the crush energy absorbing box, and the two ends of the connecting shaft respectively pass through the through-axis hole and the movable hole, and the connecting shaft is fixed to the mounting plate; the elastic energy absorbing component also includes a second elastic member, the second elastic member is passed through the connecting shaft, and the second elastic member is located between the mounting plate and the limiting plate.

[0014] In a second aspect, an embodiment of the present application provides a vehicle, which includes the above-mentioned vehicle front lower protection.

[0015] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0016] By connecting the frame fixing support and the crossbeam body by means of an energy absorbing mechanism, and installing a switching mechanism connected to the signal of the monitoring device on the energy absorbing mechanism, the monitoring device can be used to timely monitor the surrounding conditions of the vehicle. When the monitoring device installed on the crossbeam body detects the first protection state or the second protection state, the switching mechanism can be used to switch the state of the energy absorbing mechanism. The second protection state may be that pedestrians are detected around the vehicle. At this time, the energy absorbing mechanism switches to elastically connecting the frame fixing support and the crossbeam body, thereby increasing the buffering performance of the lower protection and solving the technical problem that when a commercial vehicle collides with a pedestrian or a cyclist in the related technology, the lower protection with higher strength and stiffness may cause greater harm to the pedestrian or the cyclist. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of the front lower protection of a vehicle provided in an embodiment of the present application;

[0019] Figure 2 An exploded view of the front lower protection of a vehicle provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of a top view of the front lower protection of a vehicle provided in an embodiment of the present application;

[0021] Figure 4 for Figure 3 Cross-sectional view of AA in the middle;

[0022] Figure 5 A schematic diagram of the structure in which the limiting member provided in the embodiment of the present application is retracted from the support tube;

[0023] Figure 6 A schematic diagram of the structure in which the position-limiting member provided in the embodiment of the present application is plugged into the support tube and the energy-absorbing tube;

[0024] Figure 7 A schematic diagram of the side structure of the front lower protection of a vehicle provided in an embodiment of the present application.

[0025] In the figure:

[0026] 1. beam body; 11. first fixing plate; 12. second fixing plate;

[0027] 2. Monitoring device; 21. Warning light; 22. Millimeter wave radar; 23. Ultrasonic radar;

[0028] 3. Frame fixing support;

[0029] 4. Energy absorbing mechanism; 41. Support tube; 42. Energy absorbing tube; 43. Elastic device; 431. Connecting column; 432. First elastic member;

[0030] 5. Switching mechanism; 51. Driving member; 52. Limiting member; 521. Cam; 522. Lock pin; 523. Elastic reset member;

[0031] 6. Fixed support plate; 62. Through-tube hole; 63. Limiting plate;

[0032] 7. Crushing energy absorbing device; 71. Crushing energy absorbing box; 711. Mounting plate; 712. Support section; 713. Energy absorbing section; 721. Connecting shaft; 722. Second elastic member. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] The embodiment of the present application provides a front lower protection for a vehicle, which can solve the technical problem in the related art that the strength and rigidity of the lower protection are relatively high, and when a commercial vehicle collides with a pedestrian or a cyclist, the higher strength and rigidity of the lower protection may cause greater harm to the pedestrian or the cyclist.

[0035] See also Figure 1As shown, a vehicle front lower protection provided by an embodiment of the present application may include: a cross beam body 1, on which a monitoring device 2 is installed; a frame fixing support 3, which is connected to the cross beam body 1 through an energy absorbing mechanism 4, and the vehicle front lower protection as a whole is fixed to the vehicle frame through the frame fixing support 3; a switching mechanism 5, which is installed on the energy absorbing mechanism 4, and the switching mechanism 5 is connected to the monitoring device 2 by signal, and the switching mechanism 5 is configured to switch the energy absorbing mechanism 4 to rigidly connect the frame fixing support 3 and the cross beam body 1 when the monitoring device 2 detects a first protection state; when When the monitoring device 2 detects the second protection state, the energy absorbing mechanism 4 is switched to elastically connect the frame fixed support 3 and the cross beam body 1. It should be understood that the monitoring device 2 detecting the first protection state or the second protection state can be understood as judging whether the front lower protection of the vehicle should adopt the first protection state or the second protection state according to the different signals monitored by the monitoring device 2, thereby driving the switching mechanism 5 to switch the state of the energy absorbing mechanism 4. By switching the energy absorbing mechanism 4 to rigidly connect the frame fixed support 3 and the cross beam body 1, or switching the energy absorbing mechanism 4 to elastically connect the frame fixed support 3 and the cross beam body 1, the buffering performance of the front lower protection of the vehicle can be changed.

[0036] In the embodiment of the present application, the frame fixing support 3 and the cross beam body 1 are connected by the energy absorbing mechanism 4, and the switching mechanism 5 connected to the signal of the monitoring device 2 is installed on the energy absorbing mechanism 4. The monitoring device 2 can be used to timely monitor the surrounding conditions of the vehicle. When the monitoring device 2 installed on the cross beam body 1 detects the first protection state or the second protection state, the switching mechanism 5 can be used to switch the energy absorbing mechanism 4 to a state of rigidly connecting the frame fixing support 3 and the cross beam body 1, or to switch the energy absorbing mechanism 4 to a state of elastically connecting the frame fixing support 3 and the cross beam body 1, wherein the second protection state can be when pedestrians are detected around the vehicle, and when the first protection state is detected, the vehicle can be monitored when there are vehicles around the vehicle. It should be understood that the monitoring device 2 can not only identify the type of objects around the vehicle, but also comprehensively consider the movement speed of the surrounding objects. Preferably, when the lower protection is in the first protection state, it can be considered that objects around the vehicle may cause damage to the vehicle itself, and therefore the energy absorbing mechanism 4 is switched to a rigid connection to enhance the protective performance of the lower protection of the vehicle to the vehicle itself; and when the lower protection is in the second protection state, it can be considered that even if objects around the vehicle collide with the front lower protection of the vehicle, the damage to the front lower protection of the vehicle is relatively small, and therefore the safety of objects colliding with the front lower protection of the vehicle can be given more consideration, and then the energy absorbing mechanism 4 is switched to an elastic connection to increase the buffering performance of the lower protection, and also to a certain extent protect the safety of objects colliding with the front lower protection of the vehicle, thereby solving the technical problem that when a commercial vehicle collides with a pedestrian or a cyclist in the related technology, the lower protection with higher strength and rigidity may cause greater harm to the pedestrian or the cyclist.

[0037] In some optional embodiments, the energy absorbing mechanism 4 may include: a support tube 41, the support tube 41 is fixed to the frame fixing support 3. In the embodiment of the present application, two frame fixing supports 3 are symmetrically arranged along the extension direction of the cross beam body 1, and each frame fixing support 3 is fixed with a support tube 41. In some other embodiments, the frame fixing supports 3 may also be fixed with one or three or even three or more; an energy absorbing tube 42, the energy absorbing tube 42 is fixed to the cross beam body 1, and the energy absorbing tube 42 and the support tube 41 are plugged into each other, and the support tube 41 and the The energy absorbing cylinders 42 all extend in a direction perpendicular to the extension direction of the crossbeam body 1. The arrangement quantity and position of the energy absorbing cylinders 42 should be arranged corresponding to the frame fixed support 3. The energy absorbing cylinders 42 and the support cylinders 41 can be plugged into each other. The energy absorbing cylinders 42 can be sleeved on the outer periphery of the support cylinder 41, or the support cylinder 41 can be sleeved on the outer periphery of the energy absorbing cylinder 42. In the embodiment of the present application, it is set that the energy absorbing cylinder 42 is sleeved in the cavity of the support cylinder 41, and the outer wall of the energy absorbing cylinder 42 is in contact with the inner wall of the support cylinder 41. It should be understood that the energy absorbing cylinder 42 and the support cylinder 41 have a certain overlap along the axial direction of the energy absorbing cylinder 42.

[0038] In some optional embodiments, the switching mechanism 5 is installed on the support tube 41 or the energy absorbing tube 42. In the embodiment of the present application, the switching mechanism 5 is installed on the support tube 41. In some other embodiments, the switching mechanism 5 can also be installed on the energy absorbing tube 42. When the monitoring device 2 detects the first protection state, the switching mechanism 5 limits the mutual sliding of the support tube 41 and the energy absorbing tube 42. At this time, the support tube 41 and the energy absorbing tube 42 are fixed to each other, and the front lower protection of the vehicle has a stronger self-protection performance; when the monitoring device 2 detects the second protection state, the switching mechanism 5 cancels the restriction on the energy absorbing tube 42 and the support tube 41, that is, the energy absorbing tube 42 and the support tube 41 can slide a certain distance along the axial direction of the energy absorbing tube 42. In this state, when the front lower protection of the vehicle is collided, the energy absorbing tube 42 slides a certain distance along the support tube 41, which can play a certain buffering role, and then play a certain protective role for the object that collides with the vehicle. The embodiment of the present application adjusts the overall strength of the front lower protection of the vehicle by configuring the support tube 41 and the energy absorbing tube 42 to be fixed to each other or slide against each other, and the adjustment can be achieved in a simple manner.

[0039] In some optional embodiments, the switching mechanism 5 includes a driving member 51 and a limiting member 52 connected to the driving member 51; the vehicle front lower protection may also include a controller, the controller is signal-connected to the monitoring device 2, and the driving member 51 is signal-connected to the controller; the controller is used to control the driving member 51 to drive the limiting member 52 to be inserted into the support tube 41 and the energy absorbing tube 42 to fix the support tube 41 and the energy absorbing tube 42 when the monitoring device 2 detects a first protection state; when the monitoring device 2 detects a second protection state, the driving member 51 is controlled to drive the limiting member 52 to retract the support tube 41 or the energy absorbing tube 42. In the embodiment of the present application, the monitoring device 2 can also be connected to the controller through electrical signals. The monitoring device 2 may include a millimeter-wave radar 22 and an ultrasonic radar 23 fixed to the crossbeam body 1, and also include a camera device installed at other positions of the vehicle. The millimeter-wave radar 22, the ultrasonic radar 23 and the camera device are all electrically connected to the controller. The millimeter-wave radar 22 and the ultrasonic radar 23 can monitor the distance between the object on the side of the vehicle and the vehicle, as well as the driving speed of the object. The camera device can monitor whether the object traveling on the side of the vehicle is a vehicle or a pedestrian. The camera device, the millimeter-wave radar 22 and the ultrasonic radar 23 respectively transmit the acquired data to the controller. The judgment data of the first protection state and the second protection state can be input into the controller when the vehicle is designed or installed. After the judgment is completed in the controller, the driving member 51 is controlled according to the corresponding judgment result to drive the limiting member 52 to be inserted into the support tube 41 and the energy absorption tube 42, or the limiting member 52 is driven to retract the support tube 41 or the energy absorption tube 42.

[0040] Preferably, the driving member 51 can be a driving motor, which is connected to the controller. In the embodiment of the present application, the driving motor is installed on the support tube 41. Since the support tube 41 and the energy absorbing tube 42 have a partially overlapping position along the axial direction of the support tube 41, part of the driving motor can also extend into the cavity of the energy absorbing tube 42.

[0041] Furthermore, multiple through holes arranged at intervals can be provided on the peripheral sides of the support tube 41 and the energy absorbing tube 42, and the through holes of the support tube 41 and the through holes of the energy absorbing tube 42 correspond to each other. When the limiting member 52 is inserted into the support tube 41 and the energy absorbing tube 42, it is inserted into the through holes of the support tube 41 and the energy absorbing tube 42 to achieve the purpose of limiting. When the limiting between the support tube 41 and the energy absorbing tube 42 is to be released, the limiting member 52 can be retracted from the through hole in the support tube 41 or the through hole in the energy absorbing tube 42. In the embodiment of the present application, the support tube 41 is sleeved on the outer periphery of the energy absorbing tube 42, and the limiting assembly and the limiting member 52 are both installed in the cavity of the support tube 41 or the energy absorbing tube 42. When the limiting between the support tube 41 and the energy absorbing tube 42 is to be released, the driving member 51 drives the limiting member 52 to be retracted from the through hole of the support tube 41. By inserting the stopper 52 into the through-holes of the support tube 41 and the energy absorbing tube 42, or retracting it from the through-holes of the support tube 41 and the energy absorbing tube 42, the support tube 41 and the energy absorbing tube 42 can be easily fixed and unlocked. This connection method is simple and reliable, easy to implement and has low maintenance costs. The cooperation of the through-hole and the stopper 52 can provide a stable connection force, ensuring that the support tube 41 and the energy absorbing tube 42 can be tightly combined when necessary to resist external impact or load.

[0042] In some optional embodiments, see Figure 7 As shown, the front lower protection of the vehicle can also be integrated with a light warning device and a sound warning device, and the integrated light warning device and the sound warning device can be installed on the crossbeam body 1. Of course, only one of the light warning device and the sound warning device is integrated in the front lower protection of the vehicle, which also belongs to the content of this solution. The light warning device can be a warning light 21, and the sound warning device can be a voice alarm. The light warning device and the sound warning device are both connected to the controller signal. When the millimeter wave radar 22 and the ultrasonic radar 23 detect that the object around the vehicle is too close to the vehicle, the acquired distance signal is transmitted to the controller, and the controller controls the warning light 21 to light up, and controls the voice alarm to emit an alarm sound, which can not only serve as a reminder to the driver of the vehicle, but also serve as a reminder to other vehicles or pedestrians around the vehicle, so that the driver and other personnel can increase their attention after receiving the prompt signal to reduce the occurrence of collisions.

[0043] Furthermore, when it is detected that the vehicle is in a stopped state and there is no driving signal input, the light warning device and the sound warning device will not alarm; when it is detected that the vehicle is in a driving state, pedestrians or surrounding vehicles are in a dynamic state, the radar detects the dynamic trend of pedestrians or vehicles, and the controller interprets the changes in the displacement and direction of pedestrians, and issues a warning signal when there is a collision trend; and when it is detected that the vehicle is in a driving state, pedestrians or vehicles are stationary, the radar is used to measure the distance, and when the distance is less than the safety value, a warning signal is issued. Specifically, the controller can be set as a computer, and the two states in the embodiment of the present application are controlled by the driving computer. The radar collects the surrounding environment signal of the lower protection, identifies whether the person being hit is a pedestrian or a vehicle, transmits it to the driving computer for calculation and gives a signal to the solenoid valve, and the solenoid valve switches the state of the energy absorption mechanism 4 to achieve the switching of the two states of the lower protection.

[0044] In some optional embodiments, see Figure 5 and Figure 6As shown, the limiting member 52 may include: a cam 521, which is installed in the cavity of the energy absorbing cylinder 42 or the support cylinder 41, and the cam 521 is connected to the driving member 51; a locking pin 522, which is installed on the peripheral side of the cam 521, and the driving member 51 is configured to drive the cam 521 to rotate around the axis of the energy absorbing cylinder 42, so that the cam 521 drives the locking pin 522 to be inserted into the support cylinder 41 and the energy absorbing cylinder 42, or to retract the locking pin 522 from the support cylinder 41 or the energy absorbing cylinder 42. In the embodiment of the present application, the mechanism driven and inserted into the through holes of the energy absorbing cylinder 42 and the support cylinder 41 under the action of the driving member 51 can be a locking pin 522. At this time, the cam 521 can be fixed to the motor shaft of the driving motor. Preferably, the cam 521 is installed in the cavity of the overlapping part of the energy absorbing cylinder 42 and the support cylinder 41, and the cam 521 has a convex angle. The number of convex angles of the cam 521 corresponds to the number and position of the through holes on the energy absorbing cylinder 42, and also corresponds to the number and position of the locking pin 522. When the cam 521 is driven to rotate by the driving motor so that the convex angle is opposite to the locking pin 522, the locking pin 522 can be pushed out and inserted into the energy absorbing cylinder 42 and the support cylinder 41. When the cam 521 is driven to rotate by the driving motor so that the convex angle is away from the locking pin 522, the locking pin 522 is retracted from the through hole of the energy absorbing cylinder 42 or the support cylinder 41. In the embodiment of the present application, the number, position and size of the convex corners of the cam 521 match the number, position and size of the perforations on the energy absorbing cylinder 42 and the locking pin 522, ensuring that when the cam 521 is driven to rotate by the driving motor, the convex corners can accurately push out the locking pin 522, so that it can be inserted into the perforations of the energy absorbing cylinder 42 and the support cylinder 41, or the locking pin 522 can be retracted from the perforations. This precise control and efficient energy transfer improve the reliability and stability of the entire system. The locking pin 522, the perforations on the energy absorbing cylinder 42, the perforations on the support cylinder 41, and the convex corners of the cam 521 can be set to only one, or two or more.

[0045] For further information, see Figure 4 As shown, the inner wall of the energy absorbing cylinder 42 is also equipped with a plurality of elastic reset members 523, which are preferably springs, and each spring is fixed to the inner wall of the energy absorbing cylinder 42. The spring is arranged corresponding to the lock pin 522, and the spring can also be connected to the lock pin 522. When the convex corner of the cam 521 is away from the lock pin 522, under the action of the spring, the lock pin 522 can be retracted a certain distance along the radial direction of the cam 521, thereby releasing the limit between the energy absorbing cylinder 42 and the support cylinder 41. In the embodiment of the present application, by arranging the elastic reset member 523, the lock pin 522 can have a certain support effect and assist the lock pin 522 in resetting, thereby enhancing the connection stability of the lock pin 522.

[0046] In some optional embodiments, the energy absorbing mechanism 4 may further include an elastic device 43, which is installed between the cross beam body 1 and the frame fixing support 3. In the embodiment of the present application, when the energy absorbing mechanism 4 is switched to elastically connect the frame fixing support 3 and the cross beam body 1, the elastic device 43 can cooperate with the energy absorbing cylinder 42 and the support cylinder 41 to improve the buffering performance of the front lower protection of the vehicle. This setting method can further enhance the buffering performance of the front lower protection of the vehicle to achieve the purpose of protecting pedestrians or riders.

[0047] In some optional embodiments, the frame fixing support 3 is provided with a limiting hole; the elastic device 43 includes a connecting column 431, the connecting column 431 extends along the axial direction of the energy absorbing cylinder 42, one end of the connecting column 431 is fixed to the cross beam body 1, and the other end passes through the limiting hole; the connecting column 431 is penetrated by a first elastic member 432, and the first elastic member 432 is located between the frame fixing support 3 and the cross beam body 1. The first elastic member 432 can be a spring, and it should be understood that the limiting hole can be directly provided on the side of the frame fixing support 3 close to the cross beam body 1, or a reinforcing plate can be fixed on the side of the frame fixing support 3 close to the cross beam body 1, and the limiting hole can be provided on the reinforcing plate. The connecting column 431 can also be spaced apart from the energy absorbing cylinder 42 along the extension direction of the cross beam body 1, and the spacing distance can be small. Preferably, an anti-slip component is installed at the end of the connecting column 431 away from the beam body 1, and the anti-slip component is located on the side of the frame fixing support 3 away from the beam body 1. The anti-slip component can be specifically arranged in a pin hole opened in the end of the connecting column 431 by inserting a pin with a diameter larger than the limiting hole along the radial direction of the connecting column 431. The anti-slip component can prevent the connecting column 431 from falling out of the limiting hole during the movement of the connecting column 431.

[0048] Furthermore, when the support tube 41 and the energy absorbing tube 42 are not released from restriction, the elastic device 43 may not work between the frame fixed support 3 and the cross beam body 1, and it plays a buffering role together with the support tube 41 and the energy absorbing tube 42 only after the support tube 41 and the energy absorbing tube 42 are released from restriction. In the embodiment of the present application, by setting a connecting column 431 between the cross beam body 1 and the frame fixed support 3, when the support tube 41 and the energy absorbing tube 42 are not released from restriction, the connecting column 431 can play a certain connecting role, thereby enhancing the overall strength of the front lower protection of the vehicle, and after the support tube 41 and the energy absorbing tube 42 are released from restriction, the buffering performance of the front lower protection of the vehicle can be further enhanced under the action of the first elastic member 432.

[0049] In some optional embodiments, the vehicle front lower guard further includes a crush energy absorbing device 7, the crush energy absorbing device 7 is installed on the cross beam body 1, the crush energy absorbing device 7 is connected to the frame fixing support 3, and the crush energy absorbing device 7 and the energy absorbing mechanism 4 are arranged at intervals along the extension direction of the cross beam body 1. The crush energy absorbing device 7 can crush and deform when the vehicle front lower guard collides, absorb the collision energy, improve the survival rate of pedestrians and reduce the degree of damage to the vehicle.

[0050] In some optional embodiments, see Figure 3 As shown, the vehicle front lower protection may also include a fixed support plate 6, which is connected to the frame fixing support 3, and the fixed support plate 6 is provided with a through-tube hole 62. In the embodiment of the present application, the limiting hole may also be provided on the fixed support plate 6; the crushing energy absorbing device 7 includes a crushing energy absorbing box 71, one end of the crushing energy absorbing box 71 is fixed to the cross beam body 1, and the other end is passed through the through-tube hole 62 and fixed to the fixed support plate 6, and an elastic energy absorbing component is passed through the crushing energy absorbing box 71. In the embodiment of the present application, the specific setting method of the crushing energy absorbing box 71 can be to set the crushing energy absorbing box 71 to include multiple support sections 712 and multiple energy absorbing sections 713, two adjacent support sections 712 are connected by the energy absorbing section 713, all the support sections 712 and all the energy absorbing sections 713 are coaxially arranged, and the support sections 712 and the energy absorbing sections 713 can be made of the same material, but the wall thickness of the support section 712 is greater than the wall thickness of the energy absorbing section 713, and the diameter of the support section 712 is greater than the diameter of the energy absorbing section 713. Preferably, the support section 712 can be fixed to the cross beam body 1 and the fixed support plate 6. Further, the support section 712 is provided with three sections at this time, and the energy absorbing section 713 is provided with two sections. When the front lower protection of the vehicle does not collide, the energy absorbing section 713 and the support section 712 can not collapse, and the energy absorbing section 713 and the support section 712 can play a certain strengthening effect on the front lower protection of the vehicle. By providing the energy absorbing section 713 and the support section 712, the correlation between the frame fixing support 3 and the cross beam body 1 can be further strengthened to enhance the support strength of the front lower protection of the vehicle, and when the vehicle collides, the energy absorbing section 713 and the support section 712 can also collapse and absorb energy under the action of the energy absorbing section 713, thereby increasing the survival rate of pedestrians and reducing the degree of damage to the vehicle. Specifically, when the impact force at the installation point of the support section 712 and the cross beam body 1 reaches 80KN, the energy absorbing section 713 collapses.

[0051] In some optional embodiments, see Figure 2As shown, a mounting plate 711 is fixed in the cavity of the crush energy absorbing box 71, and the mounting plate 711 is provided with an axial hole, and the plate surface of the mounting plate 711 is perpendicular to the axis of the crush energy absorbing box 71; a limiting plate 63 is fixed to the fixed support plate 6 near the through-tube hole 62, and the limiting plate 63 is provided with a moving hole. After the fixed support plate 6 is fixed to the frame fixed support 3, a certain cavity can be provided between the fixed support plate 6 and the frame fixed support 3, and the limiting plate 63 can be fixed to the fixed support plate 6. The support plate 6 is away from the side of the cross beam body 1, that is, the limit plate 63 is fixed to the fixed support plate 6 and accommodated in the cavity. The support section 712 of the crush energy absorbing box 71 can be passed through the through-tube hole 62 and fixed to the limit plate 63; the elastic energy absorbing component includes a connecting shaft 721, which extends along the axial direction of the crush energy absorbing box 71, and the two ends of the connecting shaft 721 pass through the through-axis hole and the moving hole respectively, and the connecting shaft 721 is fixed to the mounting plate 711. The connecting shaft 721 and the mounting plate 711 are fixed in a manner that welding is adopted. In the embodiment of the present application, bolts are adopted for fixing. The connecting shaft 721 and the limiting plate 63 are not fixed to each other. The elastic energy absorbing assembly also includes a second elastic member 722, which is penetrated by the connecting shaft 721, and the second elastic member 722 is located between the mounting plate 711 and the limiting plate 63. When the crush energy absorbing box 71 does not collapse, the distance and state between the connecting shaft 721, the limiting plate 63 and the mounting plate 711 may not change. However, after the crush energy absorbing box 71 collides and collapses, the distance between the cross beam body 1 and the frame fixing support 3 decreases, and the cross beam body 1 approaches one side of the frame fixing support 3, so that the mounting plate 711 drives the connecting shaft 721 to approach one side of the frame fixing support 3, and the connecting shaft 721 also moves a certain distance relative to the moving hole. The second elastic member 722 is configured as a spring, which is compressed at this time and can play a certain buffering role. Furthermore, an anti-slip part is also installed on the side of the connecting shaft 721 away from the mounting plate 711 to prevent the connecting shaft 721 from slipping out of the moving hole. By arranging the mounting plate 711 in the cavity of the crushing energy absorbing box 71 and cleverly utilizing the design of the through-shaft hole and the moving hole, the whole structure is made more compact. This design not only saves space, but also improves the energy absorption efficiency. When a collision occurs, the crushing energy absorbing box 71 can collapse quickly, and through the interaction between the connecting shaft 721 and the elastic energy absorbing component, the collision energy is effectively absorbed and dispersed to protect the safety of the vehicle and passengers. And this design can adapt to the needs of different vehicle models and collision scenes. By adjusting the length of the connecting shaft 721, the stiffness of the elastic energy absorbing component and other parameters, the collision energy can be accurately controlled. Furthermore, there is an angle between the axis of the crushing energy absorbing box 71 and the extension line of the beam body 1, and the crushing energy absorbing box 71 is inclined from one end of the beam body 1 toward the side close to the support tube 41.

[0052] In some optional embodiments, the crossbeam body 1 is made of plastic FRP material, and a plurality of mutually parallel reinforcing plates are installed in the cavity of the crossbeam body 1, each of the reinforcing plates extends along the extension direction of the crossbeam body 1, and the reinforcing plates extend from one end of the crossbeam body 1 to the other end; a first fixing plate 11 is fixed on the crossbeam body 1, the energy absorbing tube 42 is fixed to the first fixing plate 11 by bolts, and the connecting column 431 is also fixed to the first fixing plate 11; a second fixing plate 12 can also be fixed to the crossbeam body 1, and the crushed energy absorbing box 71 is fixed to the second fixing plate 12 by bolts, and the energy absorbing tube 42 and the connecting column 431 are fixed by the first fixing plate 11 respectively, and the crushed energy absorbing box 71 is fixed to the second fixing plate 12, which can reduce the difficulty of splicing during vehicle assembly. The embodiment of the present application adds a pedestrian warning and pedestrian protection structure on the basis of the vehicle front lower protection structure made of plastic FRP material: the pedestrian warning is mainly a smart device that can identify pedestrians and vehicles and is originally matched with the millimeter wave radar 22 + ultrasonic radar 23 on the beam. When a pedestrian approaches or the other vehicle is at a certain distance from the own vehicle, the warning light 21 on the beam is triggered, and the other vehicle or pedestrian is alerted by flashing lights and voice reminders; if the pedestrian or vehicle does not have time to control and hits the front lower protection, the energy generated during the collision is reduced by the crushing energy absorption box 71 on the beam, thereby protecting the pedestrian or reducing the loss of the vehicle.

[0053] An embodiment of the present application also provides a vehicle, which includes the vehicle front underprotection as described above, wherein the vehicle includes the vehicle front underprotection in any of the above embodiments, and its structure and function are the same, which will not be repeated here.

[0054] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0055] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0056] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A vehicle front lower protection, characterized in that: It includes: A crossbeam body (1), wherein the crossbeam body (1) is equipped with a monitoring device (2); A vehicle frame fixing support (3), wherein the vehicle frame fixing support (3) is connected to the crossbeam body (1) via an energy absorbing mechanism (4); A switching mechanism (5), the switching mechanism (5) being mounted on the energy absorbing mechanism (4), the switching mechanism (5) being connected to the monitoring device (2) by signal, the switching mechanism (5) being configured to switch the energy absorbing mechanism (4) to a rigid connection between the frame fixing support (3) and the cross beam body (1) when the monitoring device (2) detects a first protection state; and to switch the energy absorbing mechanism (4) to an elastic connection between the frame fixing support (3) and the cross beam body (1) when the monitoring device (2) detects a second protection state.

2. The vehicle front lower protection as claimed in claim 1, characterized in that: The energy absorbing mechanism (4) comprises: A support tube (41), wherein the support tube (41) is fixed to the frame fixed support (3); An energy absorbing cylinder (42), wherein the energy absorbing cylinder (42) is fixed to the cross beam body (1), and the energy absorbing cylinder (42) and the support cylinder (41) are plugged into each other, and the support cylinder (41) and the energy absorbing cylinder (42) both extend in a direction perpendicular to the extension direction of the cross beam body (1); The switching mechanism (5) is installed on the support tube (41) or the energy absorbing tube (42); when the monitoring device (2) detects a first protection state, the switching mechanism (5) restricts the support tube (41) and the energy absorbing tube (42) from sliding relative to each other; when the monitoring device (2) detects a second protection state, the switching mechanism (5) cancels the restriction on the energy absorbing tube (42) and the support tube (41).

3. The vehicle front lower protection as claimed in claim 2, characterized in that: The switching mechanism (5) comprises a driving member (51) and a limiting member (52) connected to the driving member (51); The vehicle front lower protection also includes a controller, the controller is connected to the monitoring device (2) by signal, and the driving member (51) is connected to the controller by signal; The controller is used to control the driving member (51) to drive the limiting member (52) to be inserted into the support tube (41) and the energy absorbing tube (42) to fix the support tube (41) and the energy absorbing tube (42) when the monitoring device (2) detects a first protection state; and to control the driving member (51) to drive the limiting member (52) to retract the support tube (41) or the energy absorbing tube (42) when the monitoring device (2) detects a second protection state.

4. The vehicle front lower protection as claimed in claim 3, characterized in that: The limiting member (52) comprises: A cam (521), wherein the cam (521) is installed in a cavity of the energy absorbing cylinder (42) or the support cylinder (41), and the cam (521) is connected to the driving member (51); A locking pin (522), wherein the locking pin (522) is mounted on the peripheral side of the cam (521), and the driving member (51) is configured to drive the cam (521) to rotate around the axis of the energy absorbing cylinder (42), so that the cam (521) drives the locking pin (522) to be inserted into the support cylinder (41) and the energy absorbing cylinder (42), or to retract the locking pin (522) from the support cylinder (41) or the energy absorbing cylinder (42).

5. The vehicle front lower protection as claimed in claim 2, characterized in that: The energy absorbing mechanism (4) further comprises an elastic device (43), wherein the elastic device (43) is installed between the cross beam body (1) and the vehicle frame fixing support (3).

6. The vehicle front lower protection as claimed in claim 5, characterized in that: The frame fixing support (3) is provided with a limiting hole; The elastic device (43) comprises a connecting column (431), the connecting column (431) extending along the axial direction of the energy absorbing cylinder (42), one end of the connecting column (431) being fixed to the crossbeam body (1), and the other end passing through the limiting hole; The connecting column (431) is provided with a first elastic member (432), and the first elastic member (432) is located between the frame fixing support (3) and the crossbeam body (1).

7. The vehicle front lower protection as claimed in claim 1, characterized in that: The vehicle front lower protection also includes a crush energy absorbing device (7), which is installed on the cross beam body (1), the crush energy absorbing device (7) is connected to the frame fixing support (3), and the crush energy absorbing device (7) and the energy absorbing mechanism (4) are arranged at intervals along the extension direction of the cross beam body (1).

8. The vehicle front lower protection as claimed in claim 7, characterized in that: The vehicle front lower protection also includes a fixed support plate (6), the fixed support plate (6) is connected to the frame fixed support (3), and the fixed support plate (6) is provided with a through-tube hole (62); The crush energy absorbing device (7) comprises a crush energy absorbing box (71), one end of which is fixed to the cross beam body (1), and the other end of which is passed through the through-tube hole (62) and fixed to the fixed support plate (6), and an elastic energy absorbing component is passed through the crush energy absorbing box (71).

9. The vehicle front lower protection as claimed in claim 8, characterized in that: A mounting plate (711) is fixed in the cavity of the crush energy absorption box (71), and the mounting plate (711) is provided with an axis-through hole; A limiting plate (63) is fixed to the fixed support plate (6) near the tube-penetrating hole (62), and the limiting plate (63) is provided with a movable hole; The elastic energy absorbing component comprises a connecting shaft (721), the connecting shaft (721) extends along the axial direction of the crush energy absorbing box (71), and two ends of the connecting shaft (721) respectively pass through the shaft hole and the moving hole, and the connecting shaft (721) is fixed to the mounting plate (711); The elastic energy absorbing component further comprises a second elastic member (722), wherein the second elastic member (722) is passed through the connecting shaft (721), and the second elastic member (722) is located between the mounting plate (711) and the limiting plate (63).

10. A vehicle, characterized in that: The vehicle front lower protection comprises the vehicle front lower protection as claimed in any one of claims 1 to 9.

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