CN209795613U - Front structure of lower body of automobile - Google Patents
Front structure of lower body of automobile Download PDFInfo
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- CN209795613U CN209795613U CN201920427995.8U CN201920427995U CN209795613U CN 209795613 U CN209795613 U CN 209795613U CN 201920427995 U CN201920427995 U CN 201920427995U CN 209795613 U CN209795613 U CN 209795613U
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 101
- 230000002787 reinforcement Effects 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 230000009545 invasion Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides a front structure of a lower automobile body of an automobile, which comprises a front wall stiffening beam, two cabin longitudinal beams which are fixedly connected with the front side of the front wall stiffening beam and are respectively arranged on the two sides, and a front wall plate which is fixedly connected with the rear side of the front wall stiffening beam relative to the cabin longitudinal beams; the front wall structure is characterized by further comprising an A-pillar threshold assembly which is respectively connected to two opposite sides of the front wall plate and provided with an A-pillar and a threshold beam fixedly connected to the bottom of the A-pillar, a middle channel is arranged between the threshold beams on two sides, one end of the middle channel is fixedly connected to the front wall plate, and one end of the middle channel, which is connected with the front wall plate, and the front wall reinforcing beam are aligned or partially aligned relative to the front wall plate. Automobile body front structure under, through being connected of the both ends of preceding enclose the stiffening beam and the top of A column bottom, the cabin longeron back end is connected with the bottom of A post to and preceding bounding wall is connected with well passageway, and can be quick absorb the impact on the cabin longeron and transmit, and then improve the security of cockpit.
Description
Technical Field
the utility model relates to an automobile body technical field, in particular to automobile lower body front portion structure.
Background
With the rise of the new energy automobile industry, the pure electric automobile market is more and more fierce in competition, and the requirement on the endurance mileage of the electric automobile is higher and higher. Because the pure electric vehicle developed on the basis of the traditional fuel vehicle is limited by the lower vehicle body floor longitudinal beam structure, the arrangement space of the battery pack is limited, and the shorter battery pack can directly result in the short endurance mileage of the vehicle.
In order to promote the arrangement space of battery package, can cancel the floor longeron of automobile body down, let the battery package direct mount on the threshold roof beam, but so set up and can lead to the power transmission path discontinuity of cabin longeron, and then when the car head-on collision, can't transmit the impact in succession, and then increase car driver and crew's injured risk in the collision.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a car front portion structure of automobile body under to realize the continuous transmission of collision force on the cabin longeron, and improve the installation space of battery package.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
The front structure of the lower body of the automobile comprises a front wall reinforcing beam, two cabin longitudinal beams fixedly connected to the front side of the front wall reinforcing beam and respectively arranged on two sides, a front wall fixedly connected to the rear side of the front wall reinforcing beam relative to the cabin longitudinal beams, and an A-pillar threshold assembly which is respectively connected to two opposite sides of the front wall and is provided with an A-pillar and a threshold beam fixedly connected to the bottom of the A-pillar;
The two ends of the front wall reinforcing beam are fixedly connected to the A-pillar on the corresponding side above the bottom of the A-pillar respectively, a cabin longitudinal beam rear section is fixedly connected between the cabin longitudinal beam and the bottom of the A-pillar, a middle channel with one end fixedly connected to the front wall plate is arranged between the threshold beams on the two sides, and one end of the middle channel connected with the front wall plate and the front wall reinforcing beam are aligned or partially aligned relative to the front wall plate.
Further, reinforcing plates are fixedly connected between the bottoms of the a pillars on the two sides and the rear end face of the front wall plate respectively, and one ends of the reinforcing plates on the two sides, which are connected with the front wall plate, are aligned with or partially aligned with the cabin longitudinal beams on the corresponding sides relative to the front wall plate and the front wall reinforcing beam respectively.
Furthermore, in the height direction of the automobile, an end surface of the cabin longitudinal beam connected with the front wall reinforcing beam and an end surface of the front wall reinforcing beam are all overlapped.
further, the front wall reinforcing beam comprises a front wall reinforcing cross beam connected with the cabin longitudinal beam and front wall reinforcing oblique beams which are close to two ends of the front wall reinforcing cross beam and are respectively fixedly connected with the front wall reinforcing cross beam; the two ends of the front wall reinforcing beam are connected above the bottom of the column A, and the front wall reinforcing oblique beam is connected to the bottom of the column A.
Furthermore, an A-pillar reinforcing plate is arranged in the A pillar corresponding to the part connected with the front wall reinforced beam, and the A-pillar reinforcing plate is flush with the upper anti-collision beam in the front door of the automobile in height.
Furthermore, the rear section of the cabin longitudinal beam is connected to the bottom end face of one end, connected with the front wall reinforcing cross beam, of the cabin longitudinal beam, and one end, connected with the bottom of the column A, of the rear section of the cabin longitudinal beam is in lap joint with the front wall reinforcing oblique beam.
furthermore, a threshold beam reinforcing plate arranged along the length direction of the threshold beam is arranged in the threshold beam, and one end of the threshold beam reinforcing plate extends to the bottom of the A-pillar.
Further, in the width direction of the automobile, the reinforcing panel, the front wall reinforcing oblique beam, and the enclosure between the cabin longitudinal beam rear section and the front wall panel are formed to have a closed cross section, and the enclosure between the reinforcing panel, the cabin longitudinal beam rear section, and the a-pillar is formed to have a closed cross section.
Further, a center tunnel reinforcing plate arranged along the length direction of the center tunnel is arranged in the center tunnel, and the center tunnel reinforcing plate is arranged close to one side of the front wall plate.
Furthermore, a front wall lower reinforcing beam is fixedly connected between the rear sections of the cabin longitudinal beams on the two sides and is positioned below the middle channel and is arranged to be flush with the bottom of a front floor in the automobile.
Compared with the prior art, the utility model discloses following advantage has:
(1) Automobile lower automobile body through before enclose the both ends of stiffening beam and be connected with the top of A column bottom, cabin longeron back end and being connected of A column bottom to and preceding bounding wall is connected with well passageway, can build three biography power routes of being connected with the cabin longeron, and can be quick with the impact on the cabin longeron disperse, absorb and backward transmission, and then reduce the emergence of preceding bounding wall because of the collision invasion problem, realize improving the purpose of cockpit security.
Furthermore, the utility model discloses a well passageway adopts well or the partial arrangement mode of adjusting well with preceding wall stiffening beam, can guide the collision power to transmit well passageway, and can have better biography power performance. Meanwhile, the two ends of the front wall reinforcing beam are directly connected with the A-pillar threshold assembly, a floor longitudinal beam structure is omitted, the installation space of the battery pack can be increased, and the endurance of the battery pack is improved.
(2) the reinforcing plate is arranged to realize connection between the rear end face of the front wall plate and the bottom of the A column, and the reinforcing plate is arranged to be aligned with or partially aligned with the front wall reinforcing beam, so that collision force can be guided to be transmitted to the bottom of the A column through the reinforcing plate, and then the collision force is absorbed and transmitted backwards.
(3) the end face of one end, connected with the front wall reinforcing beam, of the cabin longitudinal beam is completely overlapped with the end face of the front wall reinforcing beam, so that the collision force on the cabin longitudinal beam can be transmitted to the front wall reinforcing beam as much as possible, and is transmitted to different force transmission paths, and the collision force is absorbed and transmitted.
(4) The cowl reinforcing oblique beam is connected to the bottom of the A-pillar, and can transmit part of the collision force transmitted to the cowl reinforcing beam to the bottom of the A-pillar, thereby dispersing the collision force on the cowl.
(5) the A-pillar reinforcing plate can absorb the collision force transmitted to the upper portion of the bottom of the A-pillar and transmit the collision force to the rear through the upper anti-collision beam.
(6) Through the connection between the rear section of the cabin longitudinal beam and the front wall reinforcing oblique beam and the bottom of the A column, the effect of transferring the collision force to the bottom of the A column can be strengthened.
(7) Threshold roof beam reinforcing plate, well passageway reinforcing plate and preceding enclose web beam down, can promote the transmission performance who bumps the energy between cabin longeron to the A post threshold assembly to promote cabin longeron to bump the transmission ability of energy between the well passageway, and can realize the quick absorption and the quick dispersion of impact, thereby enclose the collision invasion before preventing, reach the effect of protection passenger and battery package.
drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
Fig. 1 is a schematic structural view of a front structure of a lower vehicle body of an automobile according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a top view of FIG. 1;
Fig. 4 is an exploded view of a front structure of a lower body of an automobile according to an embodiment of the present invention;
FIG. 5 is a sectional view taken along line B-B of FIG. 3;
FIG. 6 is a sectional view taken along line C-C of FIG. 3;
FIG. 7 is a cross-sectional view taken along line D-D of FIG. 3;
FIG. 8 is a sectional view taken along line E-E of FIG. 3;
Description of reference numerals:
1-front wall reinforcement beam, 2-cabin longitudinal beam, 3-cabin longitudinal beam rear section, 4-front wall lower reinforcement beam, 5-middle channel reinforcement plate, 6-middle channel, 7-sill beam, 8-sill beam reinforcement plate, 9-front wall reinforcement oblique beam, 10-A column reinforcement plate, 11-A column, 12-front wall reinforcement plate and 13-reinforcement plate.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The embodiment relates to a body front portion structure under car, it includes before enclose the stiffening beam, link firmly in before enclose the front side of stiffening beam and divide two cabin longerons of locating both sides to and link firmly in before enclosing the preceding bounding wall of stiffening beam rear side for the cabin longeron. The lower vehicle body front structure further comprises an A-pillar threshold assembly which is connected to two opposite sides of the front wall plate respectively and is provided with an A-pillar and a threshold beam fixedly connected to the bottom of the A-pillar. The front side of the front wall plate is the side close to the head of the automobile, and the rear side of the front wall plate is the side close to the tail of the automobile.
Referring to fig. 1, 3 and 4, only one of the side members of the cabin side member 2, the a-pillar rocker assembly and the rear part 3 of the cabin side member is shown in fig. 4 for clarity, and the cowl reinforcement beam is welded to the dash panel 12 and forms a closed cross section, which facilitates absorption of collision force transmitted to the cowl reinforcement beam 12. Specifically, the cowl reinforcing beam includes a cowl reinforcing cross member 1 connected to the nacelle side member 2, and cowl reinforcing diagonal members 9 attached to the cowl reinforcing cross member 1 near both ends of the cowl reinforcing cross member 1, respectively. The two ends of the front wall reinforcing beam 1 are respectively fixed to the A columns 11 on the corresponding sides above the bottoms of the A columns 11, the cross section of the front wall reinforcing beam 1 is in a shape like a Chinese character 'ji', and the cross section of the front wall reinforcing oblique beam 9 can be in other structural forms such as a circle and an arc besides the shape like the Chinese character 'ji'.
in addition, the front wall reinforcing beam 1 and the front wall reinforcing oblique beam 9 can adopt an integrally formed structural form besides a split structure. Meanwhile, in order to increase the installation space of the battery pack, in this embodiment, the distance between the two a pillars 11 is greater than the distance between the two cabin longitudinal beams 2, so that the cabin longitudinal beams 2 transmit the collision force to the front wall reinforcing beam along the length direction of the automobile, and then transmit the collision force along the width direction of the automobile through the front wall reinforcing beam, thereby facilitating the dispersion of the collision force.
As shown in fig. 1, in the vehicle height direction, the end face of the nacelle side member 2 connected to the cowl cross member 1 and the end face of the cowl cross member 1 are all overlapped to ensure the transmission effect of the collision force to the maximum extent.
In this embodiment, a cabin longitudinal beam rear section 3 is fixedly connected between the cabin longitudinal beam 2 and the bottom of the a-column 11, that is, the cabin longitudinal beam rear section 3 is specifically lifted at the rear end of the cabin longitudinal beam 2. As shown in fig. 6, the enclosure between the rear section 3 of the nacelle side member and the cross member of the front wall 12 and the front wall 12 is formed to have a closed cross section, so as to effectively prevent the rear end of the nacelle side member 2 from being bent due to collision, and to facilitate the absorption of collision force on the nacelle side member 2.
With continued reference to fig. 1, a center tunnel 6 is provided between the rocker beams 7 on both sides, one end of which is fixedly connected to the dash panel 12, the center tunnel 6 also has a cross-section in the shape of a "u" with its opening facing downward, and the center tunnel 6 can be welded to the front floor, which can facilitate the absorption and transmission of collision energy. In addition, referring to fig. 4, the end of the center tunnel 6 connected to the dash panel 12 is turned outward to be partially aligned with the dash reinforcement cross member 1 with respect to the dash panel 12, and the mounted state is as shown in fig. 7, so that the efficiency of transmitting the collision force of the center tunnel 6 can be improved while the requirement for mounting the battery pack is ensured. It should be noted that the end of the center tunnel 6 connected to the dash panel 12 in the present embodiment may be aligned with the cowl reinforcing crossmember 1 with respect to the dash panel 12, so as to maximize the energy transfer efficiency.
Further, in order to improve the use effect of the center tunnel 6 to disperse the collision force to the floor structure, the center tunnel reinforcement plate 5 arranged in the length direction thereof is provided in the center tunnel 6 in the present embodiment, and the center tunnel reinforcement plate 5 is provided near the dash panel 12 side.
As shown in fig. 3 and 4, a reinforcement plate 13 is attached between the bottom of the a-pillars 11 on both sides and the rear end face of the dash panel 12, respectively. To further enhance the use effect of the reinforcing panel 13, in the present embodiment, as shown in fig. 2, the reinforcing panel 13 and the cabin side member 2 are aligned in the vehicle width direction, and the cross-sectional portions overlap in the vehicle height direction, so that the ends of the reinforcing panels 13 on both sides connected to the cowl 12 are respectively aligned with the portions of the cabin side member 2 on the corresponding sides with respect to the cowl 12 and the cowl cross member 1. Referring to fig. 5, the periphery between the reinforcing plate 13 and the front-wall reinforcing oblique beam 9 is formed as a closed section, and the periphery between the reinforcing plate 13, the nacelle side member rear section 3 and the a-pillar 11 is formed as a closed section as shown in fig. 8, so that the torsional rigidity of the entire vehicle can be improved while transmitting energy.
in the present embodiment, the reinforcing plate 13 is provided to guide the transmission of the collision force to the bottom of the a-pillar 11, and to accelerate the dispersion speed of the collision force, so that the intrusion amount of the front wall can be reduced, thereby protecting the safety of the passenger in the cabin. Of course, the reinforcement panel 13 may be completely aligned with the reinforcement beam of the dash panel 12 with respect to the dash panel 12, so as to maximize the energy transmission efficiency.
Referring to fig. 2 and 4, in order to improve the structural strength of the a-pillar 11, an a-pillar reinforcement panel 10 is provided in the a-pillar 11 corresponding to a portion connected to the cowl reinforcing cross member 1. And the A-pillar reinforcement plate 10 is arranged on the outer side surface of the A-pillar 11 and is flush with the upper impact beam in the front door of the automobile in the automobile height direction. So, transmit the impact to the rear of a vehicle to the shutter through last anticollision roof beam in to reach the effect of quick dispersed energy.
In order to improve the transmission of the collision force to the bottom of the a-pillar 11, in this embodiment, the rear cabin longitudinal beam section 3 is connected to the bottom end surface of the end of the cabin longitudinal beam 2 connected to the front reinforcing cross beam 1, and the end of the rear cabin longitudinal beam section 3 connected to the bottom of the a-pillar 11 is connected to the front reinforcing oblique beam 9 in an overlapping manner. In this embodiment, in order to improve the use effect of the rocker beam 7, the cross section of the rocker beam 7 is also in the shape of an open "u" and the opening of the rocker beam is arranged toward the side wall. In addition, a rocker reinforcement 8 formed along the rocker 7 is provided in the opening of the rocker 7, the rocker reinforcement 8 is disposed along the length of the rocker 7, and one end of the rocker reinforcement 8 extends to the bottom of the a-pillar 11.
As shown in fig. 1, a front lower reinforcement beam 4 is fixedly connected between the rear sections 3 of the cabin longitudinal beams on both sides, and the front lower reinforcement beam 4 is located below the center tunnel 6 in the height direction of the automobile. With the arrangement, the torsional rigidity of the whole vehicle can be improved while the collision force is transmitted to the middle channel 6. And a closed frame structure is formed between the front wall lower reinforcing beam 4 and the rear section 3 of the cabin longitudinal beam, so that the absorption of collision force is improved. Meanwhile, the rigidity of the foot region structure of the driver can be ensured by the front wall lower reinforcing beam 4, so that the safety in the cockpit is improved. In addition, the lower part of the floor is flush with the bottom of the front floor in the automobile, so that the collision impact of the lower part of the floor on the battery pack is reduced, and the effect of protecting the battery module is achieved.
The front structure of the automobile lower body in the embodiment is connected with the upper portion of the bottom of the A column 11 through the two ends of the front wall reinforcing beam 1, the cabin longitudinal beam rear section 3 is connected with the bottom of the A column 11 through the front wall reinforcing beam, the front wall reinforcing beam 4 is connected with the middle channel 6 through the front wall 12, and the front wall reinforcing beam 4 and the middle channel can be connected with the cabin longitudinal beam 2 through three force transmission paths. That is, the collision force on the cabin side member 2 can be transmitted to the upper side of the bottom of the a-pillar 11 through both ends of the cowl cross member 1, and the collision force is dispersed to the upper portion of the side wall, which is the first force transmission path. Meanwhile, the collision force on the cabin longitudinal beam 2 is also directly transmitted to the bottom of the A-pillar 11 through the cabin longitudinal beam rear section 3 and the front wall reinforcing oblique beam 9, the corresponding part of the A-pillar 11 can absorb the collision force, and the collision force is transmitted to the bottom plate assembly and the side wall assembly through the doorsill beam 7, and the first force transmission path is formed. The collision force of the cabin side member 2 is transmitted to the center tunnel 6 via the front wall reinforcement beam 1, the cabin side member rear section 3, the front wall lower reinforcement beam 4, and the front wall panel 12, and the center tunnel 6 absorbs the energy and transmits the energy to the rear side of the vehicle body, which is a third path.
In the embodiment, the collision force on the cabin longitudinal beam 2 can be rapidly dispersed, absorbed and transmitted backwards by arranging the three force transmission paths, so that the problem of invasion of the front wall plate 12 due to collision is reduced, and the purpose of improving the safety of the cockpit is realized. In addition, with battery package direct mount on two threshold roof beams 7, compare and install on two floor longerons among the prior art, have the advantage that installation space is big to be favorable to improving battery capacity, and promote the continuation of the journey mileage of car.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a car lower vehicle body front portion structure which characterized in that: the front-wall reinforcing beam comprises a front-wall reinforcing beam, two cabin longitudinal beams (2) fixedly connected to the front side of the front-wall reinforcing beam and respectively arranged on two sides, a front wall plate (12) fixedly connected to the rear side of the front-wall reinforcing beam relative to the cabin longitudinal beams (2), and an A-pillar threshold assembly which is respectively connected to two opposite sides of the front wall plate (12) and is provided with an A-pillar (11) and a threshold beam (7) fixedly connected to the bottom of the A-pillar (11);
The two ends of the front wall reinforcing beam are respectively fixedly connected to the A columns (11) on the corresponding sides above the bottoms of the A columns (11), a cabin longitudinal beam rear section (3) is fixedly connected between the cabin longitudinal beam (2) and the bottoms of the A columns (11), a middle channel (6) with one end fixedly connected to the front wall plate (12) is arranged between the threshold beams (7) on the two sides, and one end of the middle channel (6) connected with the front wall plate (12) and the front wall reinforcing beam are aligned or partially aligned relative to the front wall plate (12).
2. the lower vehicle body front structure of an automobile according to claim 1, characterized in that: reinforcing plates (13) are fixedly connected between the bottoms of the A columns (11) on two sides and the rear end face of the front wall plate (12), and one ends of the reinforcing plates (13) on two sides, which are connected with the front wall plate (12), are aligned or partially aligned with the cabin longitudinal beams (2) on the corresponding sides relative to the front wall plate (12) and the front wall reinforcing beams.
3. The automobile lower body front structure according to claim 2, characterized in that: in the height direction of the automobile, the end surface of the cabin longitudinal beam (2) connected with the front wall stiffening beam and the end surface of the front wall stiffening beam are all overlapped.
4. The automobile lower body front structure according to claim 2, characterized in that: the front wall reinforcing beam comprises a front wall reinforcing cross beam (1) connected with the cabin longitudinal beam (2) and front wall reinforcing oblique beams (9) which are close to two ends of the front wall reinforcing cross beam (1) and are fixedly connected to the front wall reinforcing cross beam (1) respectively; the two ends of the front wall reinforcing beam (1) are connected above the bottom of the A column (11), and the front wall reinforcing oblique beam (9) is connected to the bottom of the A column (11).
5. The automobile lower body front structure according to claim 4, characterized in that: and an A-pillar reinforcing plate (10) is arranged in the A pillar (11) corresponding to the part connected with the front wall reinforcing beam (1), and the A-pillar reinforcing plate (10) is flush with the upper anti-collision beam in the front door of the automobile.
6. the automobile lower body front structure according to claim 4, characterized in that: the rear cabin longitudinal beam section (3) is connected to the bottom end face of one end, connected with the front wall reinforcing cross beam (1), of the rear cabin longitudinal beam section (2), and one end, connected with the bottom of the A column (11), of the rear cabin longitudinal beam section (3) is connected with the front wall reinforcing oblique beam (9) in an overlapping mode.
7. The lower vehicle body front structure of an automobile according to claim 6, wherein: and a threshold beam reinforcing plate (8) arranged along the length direction of the threshold beam (7) is arranged in the threshold beam (7), and one end of the threshold beam reinforcing plate (8) extends to the bottom of the A column (11).
8. The automobile lower body front structure according to claim 4, characterized in that: in the width direction of the vehicle, the reinforcement panel (13), the front wall reinforcement stringer (9), and the enclosure between the cabin stringer rear section (3) and the front wall panel (12) are formed to have a closed cross section, and the reinforcement panel (13), the cabin stringer rear section (3), and the a-pillar (11) are formed to have a closed cross section.
9. The lower vehicle body front structure of an automobile according to claim 1, characterized in that: a center tunnel reinforcing plate (5) arranged along the length direction of the center tunnel (6) is arranged in the center tunnel (6), and the center tunnel reinforcing plate (5) is arranged close to one side of the front wall plate (12).
10. The lower vehicle body front structure of the automobile according to any one of claims 1 to 9, wherein: and a front-wall lower reinforcing beam (4) is fixedly connected between the rear sections (3) of the cabin longitudinal beams on the two sides, and the front-wall lower reinforcing beam (4) is positioned below the middle channel (6) and is arranged to be flush with the bottom of a front floor in the automobile.
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CN201920427995.8U CN209795613U (en) | 2019-03-30 | 2019-03-30 | Front structure of lower body of automobile |
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