CN115214523B - Shank protection device, vehicle front end pedestrian protection device and vehicle - Google Patents
Shank protection device, vehicle front end pedestrian protection device and vehicle Download PDFInfo
- Publication number
- CN115214523B CN115214523B CN202110352292.5A CN202110352292A CN115214523B CN 115214523 B CN115214523 B CN 115214523B CN 202110352292 A CN202110352292 A CN 202110352292A CN 115214523 B CN115214523 B CN 115214523B
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- lower leg
- bracket
- pedestrian
- vehicle
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- 244000309466 calf Species 0.000 claims description 49
- 238000010438 heat treatment Methods 0.000 claims description 30
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 17
- 230000001012 protector Effects 0.000 claims description 2
- 210000003195 fascia Anatomy 0.000 claims 1
- 210000002414 leg Anatomy 0.000 abstract description 16
- 210000000689 upper leg Anatomy 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 208000018982 Leg injury Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 210000000629 knee joint Anatomy 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
- B60R2021/346—Protecting non-occupants of a vehicle, e.g. pedestrians means outside vehicle body
Abstract
The invention discloses a lower leg protection device, a pedestrian protection device at the front end of a vehicle and the vehicle, which comprise a lower leg protection bracket and a driving device; the front end of the lower leg protection bracket is detachably connected with the front protection lower ornamental plate, and the rear end of the lower leg protection bracket is vertically movably connected with the front end module; the driving device is used for driving the lower leg protecting bracket to move downwards. When the vehicle runs normally, the lower leg protection bracket is kept in a first state, and the ground clearance is high, so that the trafficability of the vehicle is not affected; when a pedestrian collision accident occurs, the driving device drives the shank protection support to move downwards until the shank protection support descends to a position suitable for supporting the shank, the driving device stabilizes the position of the shank protection support, the shank protection support is kept in a second state, the ground clearance is low, and the shank of the pedestrian can be supported, so that the leg of the pedestrian is prevented from being seriously damaged due to relative bending deformation of the shank and the thigh, and the cross-country trafficability and the shank protection performance are considered.
Description
Technical Field
The invention belongs to the field of passive safety of automobiles, and particularly relates to a lower leg protection device, a pedestrian protection device at the front end of a vehicle and the vehicle.
Background
When a pedestrian collides with a vehicle in a front direction, a pedestrian protection device is generally additionally arranged at the front bumper position at the front end of the vehicle in order to reduce the injury of the pedestrian; the pedestrian protection device generally comprises a front anti-collision beam buffer block and a lower leg protection support, and when a pedestrian collision accident occurs, the front anti-collision beam buffer block, the lower leg protection support and the front edge of the engine cover jointly provide buffer and support for legs of the pedestrian, so that leg injuries are reduced.
With the increasing sophistication of pedestrian protection regulations, the leg-type impactors in pedestrian protection tests gradually transition from the original rigid leg-type impactors, flexible leg-type impactors, to the aPLI leg-type impactors with added upper mass. The aPLI leg type impactor is closer to an actual human body model, has larger mass and uneven mass distribution and smaller ground clearance compared with the original flexible leg type impactor, and also places more stringent requirements on the front end structural arrangement of the vehicle, such as the requirement that the front edge of an upper engine cover is high enough to support the thigh part of the aPLI leg type impactor and the requirement that the position of the front protective lower edge is low enough to support the shank part of the aPLI leg type impactor in order to reduce the elongation of the knee middle ligament.
For some vehicle types (such as medium and large SUV vehicle types), the cross-country trafficability requirement is high, the approach angle is large, the front lower edge of the front protection is enough to be high enough, the lower edge of the lower leg protection support is generally high enough to fit with the front lower edge of the front protection, the lower leg protection support cannot meet the requirement of pedestrian protection test by adopting an aPLI leg type impactor, the lower leg protection support cannot support the lower leg part of a pedestrian, the thigh part of the lower leg and the lower leg part of the pedestrian are enabled to generate larger relative bending deformation around knee joints, serious leg structure damage is finally caused, and the pedestrian is even easily involved into the vehicle bottom, namely the problem that the cross-country trafficability and the lower leg protection contradict exists.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problem that the cross-country trafficability of the existing scheme and the lower leg protection performance are contradictory, the lower leg protection device, the front end pedestrian protection device and the vehicle are provided.
In order to solve the technical problems, the embodiment of the invention provides a lower leg protection device, which comprises a lower leg protection bracket and a driving device;
the front end of the lower leg protection bracket is detachably connected with the front protection lower ornamental plate, and the rear end of the lower leg protection bracket is vertically movably connected with the front end module;
the driving device is used for driving the lower leg protection support to move downwards.
Optionally, the device also comprises a sensing device and a control device;
the sensing device is used for sensing pedestrian collision and sending collision signals to the control device;
the control device receives the collision signal and controls the driving device to drive the lower leg protection bracket to move downwards when the collision signal is a preset signal.
Optionally, the lower leg protection bracket comprises a bracket body and a front buckle arranged at the front end of the bracket body, and the front buckle is clamped with the front protection lower decorative plate;
the lower leg protection device further comprises a connecting assembly, wherein the connecting assembly is used for connecting the rear end of the bracket body to the front end module and limiting the movable direction of the bracket body to the vertical direction.
Optionally, the driving means comprises a first elastically stretchable element and a first heating element;
the first elastic telescopic element is arranged between the lower leg protection bracket and the front lower decorative plate; the first elastically telescoping member is capable of elongating upon an increase in temperature thereof to apply a downward force to the calf support;
the first heating element is electrically connected with the control device and is used for heating the first elastic telescopic element.
Optionally, a receiving groove is formed in the front buckle, and at least one first elastic telescopic element and at least one first heating element are contained in the receiving groove;
the first elastic telescopic element is a two-way memory alloy spring, one end of the two-way memory alloy spring is connected with the front lower decorative plate, and the other end of the two-way memory alloy spring is connected with the lower leg protection bracket.
Optionally, the driving means comprises a second elastic telescopic element and a second heating element;
the second elastic telescopic element is arranged between the rear end of the bracket body and the front end module; the second elastic telescopic element is capable of being elongated when its temperature increases to exert a downward force on the calf support;
the second heating element is electrically connected with the control device and is used for heating the second elastic telescopic element.
Optionally, a rear mounting hole is formed at the rear end of the bracket body; the connection assembly further includes a fastener and a locking washer;
the fastener comprises a guide post, and an upper limit part and a lower limit part which are respectively arranged at the upper end and the lower end of the guide post;
the guide post passes through the rear mounting hole and the front end module;
the locking gasket is abutted against the front end module and locks the guide post, so that the locking gasket is matched with the lower limiting part to fix the bracket body on the front end module;
the locking gasket is arranged at intervals with the upper limiting part and is used for abutting against the upper limiting part to limit the limiting position of the fastener to move downwards;
the fastener can move downwards against the restraint of the locking gasket when the driving device drives the lower leg protection bracket to move downwards.
Optionally, the bracket body is a front protection lower guard plate and is attached to the front protection lower decorative plate and the front end module.
The embodiment of the invention also provides a vehicle front-end pedestrian protection device, which comprises an engine cover, a front protection body, a front protection lower ornamental plate, a front end module and the lower leg protection device.
The embodiment of the invention also provides a vehicle, which comprises the device for protecting the pedestrian at the front end of the vehicle.
According to the lower leg protection device, the front end pedestrian protection device and the vehicle, which are provided by the embodiment of the invention, when the vehicle runs normally, the lower leg protection support is kept in the first state, and the ground clearance is higher, so that the trafficability of the vehicle is not affected; when a pedestrian collision accident occurs, the driving device drives the shank protection bracket to move downwards until the shank protection bracket descends to a position suitable for supporting the shank, the driving device stabilizes the position of the shank protection bracket, the shank protection bracket is kept in a second state, the ground clearance is lower, the shank of a pedestrian can be supported, the leg of the pedestrian is prevented from being seriously damaged due to the relative bending deformation of the shank and the thigh, and therefore, the cross-country trafficability and the shank protection performance are both considered, and the pedestrian protection device is suitable for a medium-large SUV vehicle type through a pedestrian protection test by adopting an aPLI leg type impactor;
the front end of the lower leg protecting bracket is detachably connected with the front protecting lower ornamental plate, so that the stability of the lower leg protecting bracket in a first state is ensured, and the lower leg protecting bracket is easy to move under the drive of the driving device;
the front end module provides support for the shank protection support in a first state, when the driving force applied to the shank protection support by the driving device is large enough, the shank protection support can move vertically downwards relative to the front end module, and the front end module positions the shank protection support in a second state, so that the shank protection support is prevented from displacing in the front-rear direction relative to the vehicle, and the shank of a pedestrian can be reliably supported in a pedestrian collision accident.
Drawings
FIG. 1 is a reference diagram of a state of use of a part of a vehicle in a pedestrian protection test according to an embodiment of the present invention;
fig. 2 is a reference diagram for a second use state of a part of a vehicle in a pedestrian protection test according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a lower leg protection device, a front protection lower plaque and a front end module according to an embodiment of the present invention;
fig. 4 is a schematic view showing a bottom view structure of a lower leg protection device, a front protection lower plaque and a front end module according to an embodiment of the present invention;
FIG. 5 is a schematic illustration in cross-section in the direction of FIG. 4a of a connection between a calf protector and a front end module provided in accordance with an embodiment of the invention;
FIG. 6 is a second schematic cross-sectional view of the connection between the calf protection apparatus and the front end module in the direction of FIG. 4A-A provided by an embodiment of the invention;
fig. 7 is a schematic top view of a lower leg protecting bracket according to an embodiment of the present invention;
reference numerals in the specification are as follows:
10. a shank protective bracket; 11. a bracket body; 12. a front buckle; 13. a rear mounting hole; 14. reinforcing ribs;
20. a driving device; 21. a first elastic expansion element; 22. a second elastic expansion element;
30. front protection lower ornamental plate;
40. a front end module;
50. a connection assembly; 51. a fastener; 511. a guide post; 512. an upper limit part; 513. a lower limit part; 52. a locking spacer;
60. an engine cover; 70. a front protection body;
80. an aPLI leg impactor; G. ground line.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 3, a calf protection apparatus provided in an embodiment of the present invention includes a calf protection bracket 10 and a driving apparatus 20;
the front end of the lower leg protecting bracket 10 is detachably connected to the front protecting lower plaque 30, and the rear end is vertically movably connected to the front end module 40;
the driving device 20 is used to drive the lower leg protecting bracket 10 to move downward.
The lower leg protecting bracket 10 has two working states, wherein the lower leg protecting bracket 10 is kept in a first state (as shown in fig. 1) when the vehicle is running normally, and the lower leg protecting bracket 10 is kept in a second state (as shown in fig. 2) when a pedestrian collision accident occurs, the ground line G is shown in fig. 1 and 2, and the ground clearance of the lower leg protecting bracket 10 in the first state is higher than that of the lower leg protecting bracket 10 in the second state.
Specifically, the driving device 20 may be controlled by an ECU module of the whole vehicle, and the driving device 20 may be a driving structure that is automatically started when a pedestrian collides with the vehicle.
According to the calf protection device provided by the embodiment of the invention, the calf protection support 10 is kept in the first state when the vehicle normally runs, and the ground clearance is high, so that the trafficability of the vehicle is not affected; when a pedestrian collision accident occurs, the driving device 20 drives the shank protection support 10 to move downwards until the shank protection support 10 descends to a position suitable for supporting the shank, the driving device 20 stabilizes the position of the shank protection support 10, the shank protection support 10 is kept in a second state, the ground clearance is low, the shank of a pedestrian can be supported, the serious damage to the leg of the pedestrian caused by the relative bending deformation of the shank and the thigh can be avoided, and the pedestrian protection test by adopting the aPLI leg type impactor 80 can be applied to medium and large SUV models;
the front end of the lower leg protecting bracket 10 is detachably connected to the front protecting lower plaque 30, so that the stability of the lower leg protecting bracket 10 in the first state is ensured, and the lower leg protecting bracket 10 is easy to move under the drive of the driving device 20;
the front end module 40 provides support for the calf support bracket 10 in the first state, and when the driving force applied to the calf support bracket 10 by the driving device 20 is sufficiently large, the calf support bracket 10 can move vertically downwards relative to the front end module 40, and the front end module 40 positions the calf support bracket 10 in the second state, so that the calf support bracket 10 is prevented from being displaced in the front-rear direction relative to the vehicle, and the calf of a pedestrian can be reliably supported in a pedestrian collision accident;
in addition, both the front lower plaque 30 and the front end module 40 can also provide a plurality of mounting points for the lower leg link 10 distributed in the vehicle width direction, thereby making the mounting of the lower leg link 10 on the vehicle more stable and reliable.
Preferably, the difference between the ground clearance of the calf protection support 10 in the first state and the ground clearance of the calf protection support 10 in the second state is 30-50mm, so that good cross-country trafficability can be ensured when the vehicle normally runs, and the calf of a pedestrian can be protected when a pedestrian collision accident occurs, and the pedestrian is prevented from being involved in the vehicle bottom.
Preferably, the lower leg shield 10 in the first state is hidden from the bottom of the front end of the vehicle; after the upper leg shield 10 in fig. 2 is moved up, the state of fig. 1 is presented (i.e., the leg shield 10 is hidden at the bottom of the front end of the vehicle).
In an embodiment, the calf protection device further comprises a sensing device and a control device;
the sensing device is used for sensing pedestrian collision and sending collision signals to the control device;
the control device receives the collision signal and controls the driving device 20 to drive the lower leg protecting bracket 10 to move downwards when the collision signal is a preset signal.
The sensing device comprises a sensor capable of detecting the collision intensity degree of pedestrians and the front end of the vehicle; the optimal sensing device further comprises auxiliary judging structures such as a radar and a camera, the sensor realizes main pedestrian collision judging work, and the radar and the camera assist in judging pedestrian collision.
The main functions of the control device are to classify and judge collision signals and send out execution commands, and the driving device 20 drives the lower leg protection support 10 to move downwards so as to protect pedestrians in collision accidents. The control device can be integrated in the whole vehicle ECU module to simplify the structure.
Specifically, the preset signal may be preset according to the requirement of pedestrian protection, and preferably, the downward movement function of the lower leg protecting bracket 10 of the lower leg protecting device is triggered only when the pedestrian makes severe collision contact with the front end of the vehicle.
When the vehicle runs normally, the lower leg protection support 10 is in a first state, the trafficability of the vehicle is not influenced, when the sensing device senses that the pedestrian collides with the vehicle severely, the control device automatically controls the driving device 20 to drive the lower leg protection support 10 to move downwards, so that the lower leg protection support 10 descends until the lower leg protection support is in a second state, and the lower leg protection support 10 can be accurately and quickly switched to the second state when the pedestrian collides with the vehicle severely so as to support the lower leg of the pedestrian, thereby taking the cross-country trafficability and the lower leg protection performance into consideration.
In one embodiment, as shown in fig. 3, 4 and 7, the lower leg protecting stand 10 includes a stand body 11, and the leg protecting stand 11 reliably supports the lower leg of a pedestrian in the event of a collision.
Specifically, as shown in fig. 7, the bracket body 11 may have a plate-like structure, and the width of the bracket body 11 in the left-right direction of the vehicle is slightly larger than that of the front bumper beam, and in order to increase the rigidity of the bracket body 11, reinforcing ribs 14, such as reinforcing ribs 14 intersecting in a diamond shape or a square lattice shape, may be added to the bracket body 11 to prevent the bracket body 11 from being greatly deformed during normal running of the vehicle. Preferably, the reinforcing ribs 14 are provided on the upper side of the bracket body 11.
Preferably, the bracket body 11 is a front protection lower guard plate, and the bracket body 11 reliably supports the lower leg of the pedestrian in the collision accident on one hand, and the other direction is used as the front protection lower guard plate to ensure the structural integrity of the front end of the vehicle. More preferably, the bracket body 11 is attached to the front lower guard trim 30 and the front end module 40 to increase the ground clearance of the calf guard bracket 10 in the first state.
Specifically, the lower leg shield 10 is a plastic injection molded part, and the front lower trim 30 is also a plastic injection molded part.
In an embodiment, as shown in fig. 3, 4 and 7, the calf protective support 10 further includes a front buckle 12 disposed at the front end of the support body 11, and the front buckle 12 is engaged with the front lower plaque 30. The front buckle 12 and the front lower decorative plate 30 are automatically clamped when the lower leg protecting support 10 moves upwards, so that reliable connection of the lower leg protecting support 10 and the front lower decorative plate 30 can be realized, and the front buckle 12 and the front lower decorative plate 30 are automatically separated when the lower leg protecting support 10 moves downwards, so that the lower leg protecting support 10 can be kept in a second state to reliably protect pedestrians.
Specifically, as shown in fig. 7, a plurality of front buckles 12 are provided and distributed on the bracket body 11 along the left-right direction, so as to improve the reliability of connection between the lower leg protecting bracket 10 and the front protecting lower decorative plate 30, and only the front buckle 12 on the left half section of the bracket body 11 is shown in fig. 7. The number of front catches 12 depends on the length of the holder body 11, preferably one front catch 12 is provided every 100 mm.
In one embodiment, as shown in fig. 2, the driving device 20 includes a first elastic telescopic element 21 and a first heating element;
the first elastic telescopic element 21 is arranged between the lower leg protecting bracket 10 and the front protecting lower ornamental plate 30; the first elastically telescopic element 21 is able to elongate when its temperature increases, so as to exert a downward force on the calf support;
the first heating element is electrically connected to the control device and is used for heating the first elastically stretchable element 21.
In the initial state of the first elastic telescopic element 21, the length is short, the distance between the lower leg protecting bracket 10 and the front protecting lower decorative plate 30 is short, namely the ground clearance of the lower leg protecting bracket 10 is higher, and the lower leg protecting bracket has good cross-country trafficability; when a pedestrian collision accident occurs, the control device controls the first heating element to heat the first elastic telescopic element 21, the first elastic telescopic element 21 stretches and applies downward acting force to the lower leg protecting support, and when the downward acting force is enough to overcome the constraint of the front protecting lower decorative plate 30 on the front buckle 12, the lower leg protecting support 10 moves downwards, so that the lower leg protecting support 10 is in the second state, and has good lower leg protecting performance; the structure is simple, the weight is light, the occupied space is small, and the lower leg protection support 10 can be quickly moved down when a pedestrian collision accident occurs.
Specifically, the first elastic telescopic element 21 is a memory alloy spring, preferably a two-way memory alloy spring, one end of the two-way memory alloy spring is connected with the front lower protecting decoration plate 30, the other end of the two-way memory alloy spring is connected with the lower protecting support 10, and the two-way memory alloy spring can drive the lower protecting support 10 to move downwards due to extension when being heated and can drive the lower protecting support 10 to move upwards due to shortening when not being heated.
Preferably, the first elastic expansion element 21 is a tower-shaped spring, and the tower-shaped spring is folded into a flat plate shape in the initial state, so that the distance between the lower leg protecting support 10 and the front protecting lower decorative plate 30 is closer, the cross-country trafficability is improved, and when the first heating element heats the tower-shaped spring, the tower-shaped spring is activated to stretch to be in a tower shape, and the lower leg protecting support 10 can be promoted to move downwards to protect the lower legs of pedestrians. More preferably, the first elastic expansion element 21 is a tower-shaped spring which is in a state of small upper part and large lower part when being extended, and stability is increased.
Specifically, the first heating element is a guide wire, and the guide wire is connected to the first elastic telescopic element 21, so that the structure is simple, and the first elastic telescopic element 21 is heated when the electric current is supplied.
In one embodiment, the front buckle 12 is provided with a receiving slot, in which at least one first elastically telescopic element 21 and at least one first heating element are received. The first elastic telescopic element 21 can apply force to the front buckle 12 of the calf protection bracket 10, so that the front buckle 12 is easy to separate from the front lower protection plaque 30 when the first elastic telescopic element 21 stretches, and the scheme that the front lower protection plaque 30 is connected with the calf protection bracket 10 through the two-way memory alloy spring is also easy to clamp the front buckle 12 with the front lower protection plaque 30 when the first elastic telescopic element 21 stretches. For simplicity of construction, each front buckle 12 preferably has a corresponding first elastically stretchable element 21 and a first heating element.
In one embodiment, as shown in fig. 4, the calf protection apparatus further includes a coupling assembly 50 for coupling the rear end of the support body 11 to the front end module 40 and limiting the movable direction of the support body 11 in the vertical direction.
The connection assembly 50 functions to both connect the cradle body 11 and the front end module 40, and also functions to limit the movable direction of the cradle body 11 in the vertical direction. During normal running of the vehicle, the support body 11 is not movable, but in the event of a pedestrian collision accident, the support body 11 needs to be moved down to reach the ground clearance of the lower leg of the pedestrian, and the support body 11 is restrained from moving backward when the pedestrian collides with the support body 11, so that the movable direction of the support body 11 is restrained in the vertical direction by the connection assembly 50, so that the support body 11 can reliably support the lower leg of the pedestrian.
Specifically, the plurality of connection assemblies 50 are provided and distributed on the bracket body 11 in the left-right direction, improving the reliability of connection of the calf protective bracket 10 with the front end module 40. The number of the connection assemblies 50 depends on the length of the bracket body 11, and generally, 4 connection assemblies 50 are provided to ensure the reliability of the previous connection between the bracket body 11 and the front end module 40.
In one embodiment, as shown in fig. 4 to 7, the rear end of the bracket body 11 is provided with a rear mounting hole 13; the connection assembly 50 further includes a fastener 51 and a locking washer 52;
the fastener 51 includes a guide pillar 511, and an upper limit portion 512 and a lower limit portion 513 respectively disposed at the upper and lower ends of the guide pillar 511;
the guide post 511 passes through the rear mounting hole 13 and the front end module 40;
the locking gasket 52 is abutted against the front end module 40 and locks the guide post 511, so that the locking gasket 52 is matched with the lower limit part 513 to fix the bracket body 11 on the front end module 40; wherein, the locking gasket 52 binds the fastener 51 through the locking guide pillar 511, so that the locking gasket 52 and the lower limit part 513 cooperate to fix the bracket body 11 on the front end module 40;
the locking gasket 52 is spaced from the upper limit portion 512 during normal running of the vehicle, and is used for abutting against the upper limit portion 512 to limit the downward movement of the fastener 51 when a pedestrian collision accident occurs;
when the driving device 20 drives the lower leg shield 10 to move downward (i.e., in the event of a pedestrian collision), the fastener 51 can move downward against the restraint of the locking washer 52.
As shown in fig. 5, during normal running of the vehicle, the locking washer 52 cooperates with the lower limit part 513 to fix the bracket body 11 on the front end module, so that the bracket body 11 is reliably fixed on the front end module 40, the calf protection bracket 10 is in the first state, and the off-road trafficability is ensured; as shown in fig. 6, when a pedestrian collision accident occurs, the driving device 20 drives the calf protection support 10, the calf protection support 10 is driven downwards, so that the fastener 51 is driven downwards, when the fastener 51 is driven downwards enough to overcome the constraint of the locking gasket 52, the calf protection support 10 and the fastener 51 move downwards relative to the locking gasket 52 together, until the upper limiting part 512 abuts against the locking gasket 52, the fastener 51 moves downwards to be limited, the calf protection support 10 is in the second state, the calf of a pedestrian can be protected, the structure is simple, the assembly is easy, the downward movement function of the calf protection support 10 of the calf protection device can be automatically triggered, and if no other parts are damaged after the pedestrian collision accident occurs, the locking gasket 52 needs to be manually reused to lock the guide pillar 511.
Preferably, the guide post 511 is a stud, the locking pad 52 is in threaded connection with the stud, when a pedestrian collision accident occurs, the driving device 20 drives the calf protection bracket 10, and the driving force is transmitted to the locking pad 52 to break the threads of the calf protection bracket, so that the stud can move downwards relative to the locking pad 52, and therefore after the pedestrian collision accident occurs, the new locking pad 52 needs to be replaced to lock the guide post 511, and if other structures of the calf protection device and other structures of a vehicle connected with the calf protection device are damaged, the damaged structures are correspondingly replaced.
In one embodiment, as shown in FIG. 6, the drive device 20 includes a second resilient telescoping element 22 and a second heating element;
the second elastic telescopic element 22 is arranged between the rear end of the bracket body 11 and the front end module 40; the second elastically telescoping member 22 is capable of elongating as its temperature increases to apply a downward force to the calf support;
the second heating element is electrically connected to the control device and is used to heat the second elastically stretchable element 22.
In the initial state of the second elastic telescopic element 22, the length is short, the distance between the lower leg protecting bracket 10 and the front end module 40 is short, namely the ground clearance of the lower leg protecting bracket 10 is higher, and the lower leg protecting bracket has good cross-country trafficability; when a pedestrian collision accident occurs, the control device controls the second heating element to heat the second elastic telescopic element 22, and the second elastic telescopic element 22 stretches and drives the lower leg protecting bracket 10 to move downwards, so that the lower leg protecting bracket 10 is in a second state, and has good lower leg protecting performance; the structure is simple, the weight is light, the occupied space is small, and the lower leg protection support 10 can be quickly moved down when a pedestrian collision accident occurs.
Specifically, the second elastic telescopic element 22 is a memory alloy spring, preferably a two-way memory alloy spring, one end of the two-way memory alloy spring is connected with the front end module 40, and the other end of the two-way memory alloy spring is connected with the lower leg protecting support 10, and the two-way memory alloy spring can drive the lower leg protecting support 10 to move downwards due to extension when being heated and can drive the lower leg protecting support 10 to move upwards due to shortening when not being heated. Preferably, the second elastic telescopic element 22 is sleeved outside the guide post 511, so as to increase the stability of the second elastic telescopic element 22 and the reliability of connecting the front end module 40 and the calf protection bracket 10.
Preferably, the second elastic expansion element 22 is a tower spring, and the tower spring is folded into a flat plate shape in the initial state, so that the distance between the calf protection bracket 10 and the front end module 40 is closer, which is beneficial to improving the cross-country trafficability. More preferably, the second elastic expansion element 22 is a tower-shaped spring which is in a state of small upper part and large lower part when being extended, and stability is improved.
Specifically, the second heating element is a guide wire, and the guide wire is connected to the second elastic telescopic element 22, so that the structure is simple, and the second elastic telescopic element 22 is heated when the electric current is supplied.
The driving device 20 is not limited to the aforementioned structure having the elastic expansion element (the first elastic expansion element 21 and the second elastic expansion element 22) and the heating element (the first heating element and the second heating element), but may have other structures, such as a lifter having an expansion sleeve and a bursting function, which can realize a rapid response in the event of a pedestrian collision accident and ensure the pedestrian calf protection function of the calf protection bracket 10.
As shown in fig. 1 to 3, the embodiment of the present invention further provides a front pedestrian protection apparatus for a vehicle, which includes an engine cover 60, a front protection body 70, a front protection lower trim 30, a front module 40, and the lower leg protection apparatus according to any of the foregoing embodiments.
The front lower plaque 30 and the front end module 40 are used for installing a lower leg protection device in addition to the existing functions, the lower leg protection bracket 10 of the lower leg protection device is in a first state, the ground clearance height is high, the trafficability of a vehicle is not affected, and when a pedestrian collides with the vehicle vigorously, the lower leg protection bracket 10 is in a second state, the ground clearance height is low, and the lower leg protection device can support the lower leg of the pedestrian, so that the pedestrian is protected mainly through the front edge of the engine cover 60, the front protection body 70 and the lower leg protection device.
The embodiment of the invention also provides a vehicle, which comprises the device for protecting the pedestrian at the front end of the vehicle.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The shank protection device comprises a shank protection bracket and is characterized by further comprising a driving device and a connecting component;
the front end of the lower leg protection bracket is detachably connected with the front protection lower ornamental plate, and the rear end of the lower leg protection bracket is vertically movably connected with the front end module;
the driving device is used for driving the lower leg protection bracket to move downwards;
the lower leg protection bracket comprises a bracket body and a front buckle arranged at the front end of the bracket body, and the front buckle is clamped with the front protection lower decorative plate;
the connecting component is used for connecting the rear end of the bracket body to the front end module and limiting the movable direction of the bracket body in the vertical direction;
the driving device comprises a first elastic telescopic element and a first heating element;
the first elastic telescopic element is arranged between the lower leg protection bracket and the front lower decorative plate; the first elastically telescoping member is capable of elongating upon an increase in temperature thereof to apply a downward force to the calf support;
the first heating element is for heating the first elastically telescoping element.
2. The calf protection apparatus of claim 1, further comprising a sensing device and a control device;
the sensing device is used for sensing pedestrian collision and sending collision signals to the control device;
the control device receives the collision signal and controls the driving device to drive the lower leg protection support to move downwards when the collision signal is a preset signal, and the control device is electrically connected with the first heating element.
3. The calf protection apparatus of claim 1, wherein the front clasp is provided with a receiving slot therein, the receiving slot receiving at least one of the first resilient telescoping element and at least one of the first heating element;
the first elastic telescopic element is a two-way memory alloy spring, one end of the two-way memory alloy spring is connected with the front lower decorative plate, and the other end of the two-way memory alloy spring is connected with the lower leg protection bracket.
4. The calf protection apparatus of claim 1, wherein the drive apparatus comprises a second resilient telescoping element and a second heating element;
the second elastic telescopic element is arranged between the rear end of the bracket body and the front end module; the second elastic telescopic element is capable of being elongated when its temperature increases to exert a downward force on the calf support;
the second heating element is electrically connected with the control device and is used for heating the second elastic telescopic element.
5. The calf protection apparatus of claim 1, wherein a rear end of the bracket body is provided with a rear mounting hole; the connection assembly further includes a fastener and a locking washer;
the fastener comprises a guide post, and an upper limit part and a lower limit part which are respectively arranged at the upper end and the lower end of the guide post;
the guide post passes through the rear mounting hole and the front end module;
the locking gasket is abutted against the front end module and locks the guide post, so that the locking gasket is matched with the lower limiting part to fix the bracket body on the front end module;
the locking gasket is arranged at intervals with the upper limiting part and is used for abutting against the upper limiting part to limit the limiting position of the fastener to move downwards;
the fastener can move downwards against the restraint of the locking gasket when the driving device drives the lower leg protection bracket to move downwards.
6. The calf protector of claim 1, wherein the bracket body is a front guard lower shield and is attached to the front guard lower trim and the front end module.
7. A front pedestrian protection apparatus for a vehicle comprising an engine hood, a front body and a front lower fascia, further comprising a front module and the lower leg protection apparatus of any one of claims 1-6.
8. A vehicle comprising the vehicle front-end pedestrian protection apparatus of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110352292.5A CN115214523B (en) | 2021-03-31 | 2021-03-31 | Shank protection device, vehicle front end pedestrian protection device and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110352292.5A CN115214523B (en) | 2021-03-31 | 2021-03-31 | Shank protection device, vehicle front end pedestrian protection device and vehicle |
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| CN115214523B true CN115214523B (en) | 2023-11-10 |
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| CN202110352292.5A Active CN115214523B (en) | 2021-03-31 | 2021-03-31 | Shank protection device, vehicle front end pedestrian protection device and vehicle |
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| CN115214523A (en) | 2022-10-21 |
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