CN108778906B - Reinforcing structure for vehicle member - Google Patents
Reinforcing structure for vehicle member Download PDFInfo
- Publication number
- CN108778906B CN108778906B CN201780018260.3A CN201780018260A CN108778906B CN 108778906 B CN108778906 B CN 108778906B CN 201780018260 A CN201780018260 A CN 201780018260A CN 108778906 B CN108778906 B CN 108778906B
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 191
- 238000003466 welding Methods 0.000 claims abstract description 82
- 230000002787 reinforcement Effects 0.000 claims description 13
- 239000000725 suspension Substances 0.000 description 5
- 238000004088 simulation Methods 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000755266 Kathetostoma giganteum Species 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D33/00—Superstructures for load-carrying vehicles
- B62D33/06—Drivers' cabs
- B62D33/063—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other
- B62D33/067—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other tiltable
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
A reinforcing front plate section (45) of a reinforcing member (40) for reinforcing the cutout section (28) is disposed at a position covering the upper region of the cutout section (28) from the rear side and joined to the reinforcing front plate section (45) of the rear cab attachment bracket (10). The welding region (55a) linearly joins the upper edge (35c) of the cut edge (35) and the reinforcing front plate (45). The welding region (59) linearly joins one edge portion (51) of the reinforcing front plate portion (45) and the rear surface (30a) of the inclined front plate portion (30). The welding region (60) linearly joins the rear surface (30a) of the inclined front plate portion (30) and one end portion (53) of the lower end edge portion (49) of the reinforcing front plate portion (45) continuously from the lower end of the welding region (59). The welding region (65) linearly joins the other edge portion (52) of the reinforcing front plate portion (45) to the rear surface (30a) of the inclined front plate portion (30).
Description
Technical Field
The present disclosure relates to a reinforcing structure of a member for a vehicle.
Background
Patent document 1 describes a rear cab mounting bracket attached to a side frame via left and right lower brackets. The rear cab mounting bracket is formed of a channel-shaped material having a cross-section of "コ", with a web portion thereof facing the upper surface and flange portions formed on both sides. The rear cab mounting bracket is constituted by two side portions and a center portion located therebetween and projecting upward therefrom. Both side portions of the rear cab mounting bracket have horizontal portions extending outward of the vehicle, and inner portions inclined upward are formed inside the horizontal portions. The center portion of the rear cab mounting bracket is constituted by a central, horizontally extending center portion and inclined end portions inclined downward from both sides of the center portion, and the inclined portions are respectively fixed to the inner portions of the rear cab mounting bracket by bolts. Under the central portion of the rear cab mounting bracket, an engine and a cylinder head cover of the engine and the like are disposed.
Documents of the prior art
Patent document
Patent document 1 Japanese patent application laid-open No. 2011-225083
Disclosure of Invention
[ problems to be solved by the invention ]
In the vehicle described in patent document 1, since the center portion of the cab mounting bracket (vehicle member) is disposed above the engine and the cylinder head cover, when other vehicle-mounted components (for example, an EGR pipe or the like) are fixed to the engine and the cylinder head cover, the other vehicle-mounted components may interfere with the flange portion or the like of the rear cab mounting bracket. When the portion of the flange portion of the rear cab mounting bracket that interferes with the other vehicle-mounted component is cut off in order to avoid interference between the rear cab mounting bracket and the other vehicle-mounted component, the strength of the rear cab mounting bracket may be reduced, and the desired strength of the rear cab mounting bracket may not be ensured.
Accordingly, an object of the present disclosure is to provide a reinforcing structure for a vehicle member that can secure the strength of the vehicle member after cutting off the portion interfering with other vehicle-mounted components.
[ means for solving the problems ]
In order to solve the above problem, a reinforcing structure for a vehicle member according to the present disclosure includes a vehicle member and a reinforcing plate. The vehicle member has a flat plate-like portion extending in a predetermined direction, and a cutout edge portion is formed in one edge portion of the plate-like portion, the cutout edge portion defining a cutout portion that cuts out one edge portion of the plate-like portion in the predetermined direction, and the plate-like portion is supported on a vehicle body side on at least one side in the predetermined direction. The reinforcing plate is disposed at a predetermined mounting position covering at least a part of the cutout portion, and is joined to the plate-shaped portion at the mounting position by welding. The welding region between the plate-shaped portion and the reinforcing plate includes a first welding region, a second welding region, a third welding region, and a fourth welding region. When the reinforcing plate is disposed at the mounting position, one surface of the plate-shaped portion is in surface contact with the surface of the reinforcing plate, both edge portions of the reinforcing plate in the predetermined direction are overlapped with the one surface of the plate-shaped portion, a cut edge portion of the plate-shaped portion is overlapped with the surface of the reinforcing plate, one edge portion of the reinforcing plate in the predetermined direction crosses the cut portion in the predetermined direction, and both end portions of the one edge portion of the reinforcing plate are overlapped with the one surface of the plate-shaped portion. The first welding region linearly joins the cut edge portion of the plate-shaped portion and the surface of the reinforcing plate. The second welding region linearly joins one edge portion of the two edge portions of the reinforcing plate on the side of the predetermined direction to one surface of the plate-like portion. The third welding region linearly joins an edge portion of the other side in the predetermined direction of the two edge portions of the reinforcing plate to one surface of the plate-shaped portion. The fourth welding region linearly joins one end portion of one edge portion of the reinforcing plate on the side of the predetermined direction to one surface of the plate-shaped portion.
In the above configuration, in a state where the reinforcing plate is disposed at the mounting position, one surface of the plate-shaped portion is in surface contact with the surface of the reinforcing plate, both edge portions of the reinforcing plate in the predetermined direction are overlapped with the one surface of the plate-shaped portion, a notched edge portion of the plate-shaped portion is overlapped with the surface of the reinforcing plate, one edge portion of the reinforcing plate along the predetermined direction crosses the notched portion in the predetermined direction, and both end portions of the one edge portion of the reinforcing plate are overlapped with the one surface of the plate-shaped portion. That is, since the reinforcing plate overlaps one surface of the plate-shaped portion in the region around the cutout portion, even if the cutout portion is provided in the vehicle member, the plate-shaped portion around the cutout portion can be reinforced by the reinforcing plate, and the strength of the vehicle member can be ensured.
Further, on one side (the side supported on the vehicle body side) of the plate-shaped portion in the predetermined direction, the second welding region linearly joins one side edge portion of the two edge portions of the reinforcing plate in the predetermined direction to one surface of the plate-shaped portion, and the fourth welding region linearly joins one side end portion of one side edge portion of the reinforcing plate in the predetermined direction to one surface of the plate-shaped portion. In this way, since the reinforcing plate is joined to the plate-shaped portion in the second welding region and the fourth welding region on one side of the plate-shaped portion in the predetermined direction, the strength of a region in the vicinity of a corner portion of the reinforcing plate (a corner portion between an edge portion of the reinforcing plate on one side in the predetermined direction and one edge portion of the reinforcing plate) of the plate-shaped portion on one side in the predetermined direction (hereinafter referred to as a region in the vicinity of the corner portion of the plate-shaped portion) can be improved as compared with a case where the reinforcing plate is joined to the plate-shaped portion only in the second welding region. That is, since the strength of the region near the corner of the plate-shaped portion on one side of the vehicle body side support (one side in the predetermined direction) can be increased, when a force in a direction intersecting the predetermined direction on the same plane on which the plate-shaped portion extends is input to the other side in the predetermined direction of the plate-shaped portion, for example, stress acting on the region near the corner of the plate-shaped portion on one side of the vehicle body side support can be reduced, and breakage of the vehicle member can be prevented.
Effects of the invention
According to the present disclosure, the strength of the vehicle member in which the interference portion with other vehicle-mounted components is cut off can be ensured.
Drawings
Fig. 1 is a side view of a vehicle to which a reinforcing structure of a member for a vehicle according to the present disclosure is applied.
Fig. 2 is a schematic rear view of the cab of the vehicle of fig. 1.
Fig. 3 is a perspective view from the front upper side of the rear cab mounting bracket.
Fig. 4 is an exploded perspective view of the rear cab mounting bracket and the reinforcement member viewed from the front and lower direction.
Fig. 5 is a perspective view of the rear cab mounting bracket and the reinforcement member viewed from the front and lower direction.
Fig. 6 is a front view as viewed from the VI direction of fig. 3.
Fig. 7 is a sectional view taken in the direction of the arrows VII-VII of fig. 3.
Detailed Description
Hereinafter, one embodiment of the present disclosure will be described with reference to the drawings. IN the drawings, FR denotes a vehicle front side, UP denotes an upper side, and IN denotes a vehicle width direction inner side. In the following description, the left-right direction means a left-right direction in a state of being directed toward the front of the vehicle.
As shown in fig. 1, the reinforcing structure of the vehicle member according to the present embodiment is applied to a reinforcing structure of a rear cab mounting bracket (vehicle member) 10 (see fig. 2) of a rear cab bracket 6 of a flathead type truck (vehicle) 1 in which a cab 2 is disposed substantially above an engine 3 (see fig. 2). The cab 2 is movable between two positions: a normal position (the position of the cab 2 shown in fig. 1) in which the front lower end portion of the cab 2 is rotatably supported about a front cab bracket 5 provided at the front end portion of the vehicle body frame 4 as a rotation axis and the rear lower end portion of the cab 2 is supported from below by a rear cab bracket 6 fixed to the vehicle body frame 4, and a tilt position (not shown) in which the rear lower end portion of the cab 2 is rotatably moved upward and forward about the front cab bracket 5 as a rotation axis.
As shown in fig. 1 and 2, the vehicle body frame 4 includes a pair of left and right side members 7 disposed on both sides in the vehicle width direction below the truck 1 and extending in the front-rear direction, and a plurality of cross members 8 extending in the vehicle width direction between the left and right side members 7 and joining the left and right side members 7 to each other (only one cross member 8 is shown in fig. 2). Left and right front wheels 9 rotatably supported on the vehicle body frame 4 side by a traveling axle (not shown) are provided at both ends in the vehicle width direction below the cab 2. An engine 3 is mounted above the left and right side members 7 below the cab 2 via an engine mount (not shown). Various vehicle-mounted components such as an air supply line (not shown), an exhaust line (not shown), and an EGR line 70 for returning a part of exhaust gas as EGR (exhaust gas Recirculation) gas from the exhaust line side to the air supply line side are fixed to the engine 3.
As shown in fig. 2, the rear cab bracket 6 includes: an arched cab rear member 11 fixed to the left and right side members 7; a pair of left and right air suspensions 12 fixed to left and right sides above the cab rear member 11; a floating member 13 elastically supported on the cab rear member 11 via left and right air suspensions 12 extending in the vehicle width direction; and a pair of left and right latches 14 fixed to both left and right end portions of the floating member 13. The left and right lock clasps 14 are locked by locking devices (not shown) in a pair of left and right cab lock brackets 16, and the pair of left and right cab lock brackets 16 are fixed to cab bracket rails 15 extending in the vehicle width direction at the lower rear end of the cab 2, thereby holding the cab 2 at the normal position. The rear cab legs 6 elastically support the lower portion of the rear end of the cab 2 at the normal position from below via left and right air suspensions 12 and the like. Instead of the left and right air suspensions 12, another elastic support member (e.g., a coil spring or the like) may be provided.
The cab rear member 11 has a pair of left and right vertical brackets 17L, 17R whose lower end portions are fixed to the left and right side members 7 and which stand in a substantially vertical direction, and a rear cab attachment bracket 10 which is fixed to the upper end portions of the left and right vertical brackets 17L, 17R and connects the upper end portions, and is formed in an arch shape. The engine 3 is disposed between the left and right vertical brackets 17L, 17R and below the rear cab attachment bracket 10. The lower end portions of the left and right vertical brackets 17L, 17R are fixed along the vehicle transverse direction outer side surfaces of the left and right side members 7, and the upper end portions are disposed above the left and right side members 7.
As shown in fig. 3, rear cab mounting bracket 10 is a metal member formed in a hat-shaped cross section from flat upper plate portion 18, flat front and rear vertical plate portions 19, 20, and flat front and rear flange portions 21, 22, and extends in an elongated shape in the vehicle width direction above engine 3. The upper plate 18 intersects the vertical direction. The front and rear vertical plate portions 19 and 20 are bent from the front and rear edges of the upper plate portion 18, extend downward, and intersect the front and rear directions. The front flange portion 21 extends forward from the lower edge of the front vertical plate portion 19 to intersect the vertical direction, and the rear flange portion 22 extends forward from the lower edge of the rear vertical plate portion 20 to intersect the vertical direction.
As shown in fig. 2, rear cab attachment bracket 10 extends substantially horizontally in the vehicle width direction at both ends in the vehicle width direction, and has left and right support end portions 23, 24, left and right inclined portions 25, 26 extending continuously from respective vehicle width direction inner ends of left and right support end portions 23, 24 to be inclined upward on the vehicle width direction inner side, and a center connecting portion 27 extending substantially horizontally in the vehicle width direction at a vehicle width direction center portion to connect the vehicle width direction inner ends of left and right inclined portions 25, 26. Upper end portions of the left and right vertical brackets 17L, 17R are fixed to lower surfaces of the left and right support end portions 23, 24, and the left and right air suspensions 12 are fixed to upper surfaces of the left and right support end portions 23, 24. That is, the left and right support end portions 23, 24 of the rear cab attachment bracket 10 are supported on the vehicle body frame 4 side (vehicle body side) by the left and right vertical brackets 17L, 17R.
As shown in fig. 3, in order to avoid interference with the EGR pipe line 70 (see fig. 2) fixed to the upper left portion of the engine 3 (see fig. 2), a cutout portion 28 is provided at the front lower portion of the left inclined portion 25. The reinforcing member 40 for reinforcing the cutout portion 28 is joined to the rear cab attachment bracket 10 by welding.
As shown in fig. 3 to 5, the left inclined portion 25 is formed by: the inclined front flange portion 29 which is the region of the inclined portion 25 on the left side in the front side flange portion 21, the inclined front plate portion (plate-like portion) 30 which is the region of the inclined portion 25 on the left side in the front side vertical plate portion 19, the inclined upper plate portion 31 which is the region of the inclined portion 25 on the left side in the upper plate portion 18, the inclined rear plate portion 32 which is the region of the inclined portion 25 on the left side in the rear side vertical plate portion 20, and the inclined rear flange portion 33 which is the region of the inclined portion 25 on the left side in the rear side flange portion 22. The plate portions 29, 30, 31, 32, and 33 of the inclined portion 25 on the left side extend from below on the vehicle width direction outer side to above on the vehicle width direction inner side (or from above on the vehicle width direction inner side to below on the vehicle width direction outer side) in a predetermined direction inclined with respect to the vehicle width direction. A bent portion 25a that is slightly bent downward is provided on one side (lower side on the vehicle width direction outer side in the present embodiment) of the left inclined portion 25 in the predetermined direction with respect to the center portion in the predetermined direction. The inclined portion 25 on the other side (the upper side on the vehicle width direction inner side in the present embodiment) in the predetermined direction from the bent portion 25a extends substantially linearly in the predetermined direction. The bent portion 25a may not be provided in the left inclined portion 25, or the left inclined portion 25 may be formed to extend substantially linearly along the predetermined direction as a whole.
The cutout 28 divides the inclined front flange portion 29 of the left inclined portion 25 into a first region 29a on one side in the predetermined direction with respect to the cutout 28 and a second region 29b on the other side in the predetermined direction with respect to the cutout 28. The cutout 28 opens a lower edge portion (an edge portion along the predetermined direction) 34 of upper and lower edge portions 37 and 34 extending along the predetermined direction of the inclined front plate portion 30 in a concave shape. One end of the notch 28 in the predetermined direction is disposed in the vicinity of one end of the inclined portion 25 on the left side in the predetermined direction, and the other end of the notch 28 in the predetermined direction is disposed on the other side of the bent portion 25a in the predetermined direction. The one side region 29a and the other side region 29b of the inclined front flange portion 29 are separated from the cutout portion 28 by the length L1 in the above-described predetermined direction.
As shown in fig. 4, the inclined front plate portion 30 of the left inclined portion 25 has a notch edge portion 35 formed at a lower edge portion 34 of the inclined front plate portion 30 to define the notch portion 28, and extends in the predetermined direction. The notch edge portion 35 has: a second side edge 35a extending continuously from an edge of the second side region 29b of the inclined front flange 29 and defining the second side of the cutout 28 of the inclined front plate 30 in the predetermined direction, a first side edge 35b extending continuously from an edge of the first side region 29a of the inclined front flange 29 and defining the first side of the cutout 28 of the inclined front plate 30 in the predetermined direction, and an upper side edge 35c connecting the second side edge 35a and an upper end of the first side edge 35 b. The upper edge 35c of the cutout edge 35 is disposed between the upper and lower edges 37 and 34 extending in the predetermined direction of the inclined front plate 30 and extends in the predetermined direction. One side of the inclined front plate portion 30 in the predetermined direction is supported by the vehicle body frame 4 via the left support end portion 23 and the left vertical bracket 17L, and the other side of the inclined front plate portion 30 in the predetermined direction is supported by the vehicle body frame 4 via the center connecting portion 27, the right support end portion 24, and the right vertical bracket 17R (see fig. 2).
As shown in fig. 3 to 5, the reinforcing member 40 integrally includes: a reinforcing upper plate portion 41 formed in a shape along the lower surface 31a of the inclined upper plate portion 31 of the left inclined portion 25, a reinforcing rear plate portion 43 extending downward while bending from the other side region 42a on the other side in the predetermined direction of the rear edge 42 of the reinforcing upper plate portion 41, and a reinforcing front plate portion (reinforcing plate) 45 extending downward while bending from the entire region of the front edge 44 of the reinforcing upper plate portion 41. The reinforcing member 40 is disposed at a predetermined mounting position (position shown in fig. 5) in the internal space 36 of the left inclined portion 25 defined by the inclined upper plate portion 31, the inclined rear plate portion 32, and the inclined front plate portion 30 of the left inclined portion 25, and is joined to the left inclined portion 25 by welding.
The reinforcing upper plate portion 41 of the reinforcing member 40 has a plurality of (3 in the present embodiment) through holes 46a, 46b, and 46c arranged apart from each other in the predetermined direction, and is formed in a state in which one side in the predetermined direction is bent downward so as to extend along the bent portion 25a of the inclined portion 25 on the left side. The length L2 of the reinforcing upper plate 41 in the predetermined direction is longer than the length L1 of the notch 28. At the predetermined mounting position, the upper surface of the reinforcing upper plate portion 41 is in surface contact with the lower surface 31a of the inclined upper plate portion 31 of the inclined portion 25 on the left side. In a state where the reinforcing member 40 is disposed at the predetermined mounting position, the reinforcing upper plate portion 41 is joined to the lower surface 31a of the inclined upper plate portion 31 by means of plug welding so as to close the 3 through holes 46a, 46b, and 46 c.
The reinforcing rear plate portion 43 of the reinforcing member 40 extends from the end portion of the reinforcing upper plate portion 41 on the other side in the predetermined direction toward the one side in the predetermined direction along the rear edge 42 of the reinforcing upper plate portion 41. In the predetermined mounting position, the lower edge portion 47 of the reinforcing rear plate portion 43 along the predetermined direction is disposed above the lower edge portion of the inclined rear plate portion 32 along the predetermined direction, and the end portion of the reinforcing rear plate portion 43 on one side in the predetermined direction is disposed in the vicinity of the other side in the predetermined direction of the bent portion 25 a. In the predetermined mounting position, the rear surface of the reinforcing rear plate portion 43 is in surface contact with the front surface 32a of the inclined rear plate portion 32 of the inclined portion 25 on the left side, the other edge portion of the reinforcing rear plate portion 43 in the predetermined direction overlaps the front surface 32a of the inclined rear plate portion 32 from the front, and the lower edge portion 47 of the reinforcing rear plate portion 43 overlaps the front surface 32a of the inclined rear plate portion 32 from the front.
In a state where the reinforcing member 40 is disposed at the predetermined mounting position, the lower end surface 43a of the reinforcing rear plate portion 43 and the front surface 32a of the inclined rear plate portion 32 are welded, and the other end surface 43b of the reinforcing rear plate portion 43 in the predetermined direction and the front surface 32a of the inclined rear plate portion 32 are welded. The welding region 48a between the lower end surface 43a of the reinforcing rear plate portion 43 and the front surface 32a of the inclined rear plate portion 32 extends from one end portion of the reinforcing rear plate portion 43 in the predetermined direction to the other end portion of the reinforcing rear plate portion 32 in the predetermined direction along the lower end surface 43a, and the lower end surface 43a of the reinforcing rear plate portion 43 and the front surface 32a of the inclined rear plate portion 32 are linearly joined. The other end surface 43b of the reinforcing rear plate portion 43 in the predetermined direction and the welding region 48b of the front surface 32a of the inclined rear plate portion 32 are continuous from the other end portion of the welding region 48a in the predetermined direction, extend along the other end surface 43b of the reinforcing rear plate portion 43 in the predetermined direction, and the end surface 43b is linearly joined to the front surface 32a of the inclined rear plate portion 32. In addition, the linear bonding in the present disclosure is not bonding by spot welding such as spot welding, but bonding by continuous welding in a predetermined direction.
As shown in fig. 4 to 7, the reinforcing front plate portion 45 of the reinforcing member 40 is formed in a substantially rectangular shape, extends downward while being bent from the entire region of the front edge 44 of the reinforcing upper plate portion 41, and a part of the other side in the predetermined direction faces the reinforcing rear plate portion 43 at a position away from the front side from the reinforcing rear plate portion 43. The distance from the reinforcing upper plate 41 to the lower edge 49 (one edge along the predetermined direction) of the reinforcing front plate 45 is set to be substantially the same as the distance from the reinforcing upper plate 41 to the lower edge 47 of the reinforcing rear plate 43. In the above-described predetermined mounting position, the front surface (front surface) 50 of the reinforcing front plate portion 45 is in surface contact with the rear surface (plate-shaped portion surface) 30a of the inclined front plate portion 30 of the inclined portion 25 on the left side (a portion of the front surface 50 of the reinforcing front plate portion 45 in surface contact with the rear surface 30a of the inclined front plate portion 30 is referred to as a first portion). As shown in fig. 6, in the predetermined mounting position, the cutout edge portion 35 of the inclined front plate portion 30 overlaps the front surface 50 of the reinforcing front plate portion 45 from the front, the reinforcing front plate portion 45 covers an upper region (inclined upper plate portion 31 side) of the cutout portion 28 from the rear side (inner space 36 side), and a region of a part of the front surface 50 of the reinforcing front plate portion 45 is an exposed surface 50a (second portion) exposed from the cutout portion 28 to the front. As shown in fig. 7, in the predetermined mounting position, the upper edge portion 68 of the reinforcing front plate portion 45 abuts against the lower surface 31a of the inclined surface portion 31, the lower edge portion 49 of the reinforcing front plate portion 45 is disposed above the lower edge portion 34 of the inclined front plate portion 30, crosses the cutout portion 28 of the inclined front plate portion 30 along the predetermined direction, both edge portions (one edge portion, the other edge portion) 51, 52 of the reinforcing front plate portion 45 in the predetermined direction are disposed on both sides of the cutout portion 28 in the predetermined direction and overlap with the rear surface 30a of the inclined front plate portion 30 from behind, and both end portions (one end portion, the other end portion) 53, 54 of the lower edge portion 49 of the reinforcing front plate portion 45 in the predetermined direction overlap with the rear surface 30a of the inclined front plate portion 30 from behind. In addition, the surface referred to in the present disclosure is not intended to mean a surface opposite to a back surface, but is intended to mean an outer surface of an object.
As shown in fig. 5 and 6, in a state where the reinforcing member 40 is disposed at the predetermined mounting position, the exposed surface 50a of the reinforcing front plate 45 and the cutout edge 35 of the inclined front plate 30 are welded. The welding region (first welding region) 55 that reinforces the exposed surface 50a of the front plate portion 45 and the cutout edge portion 35 of the inclined front plate portion 30 has: a welding region 55a between the lower end surface 56 of the upper edge portion 35c of the notch edge portion 35 and the exposed surface 50a of the reinforcing front plate portion 45, a welding region 55b between the end surface 57 of the other edge portion 35a of the notch edge portion 35 and the exposed surface 50a of the reinforcing front plate portion 45, and a welding region 55c between the end surface (not shown) of the other edge portion 35b of the notch edge portion 35 and the exposed surface 50a of the reinforcing front plate portion 45. The welding region 55a extends in the predetermined direction along the upper edge 35c of the notch edge 35, and linearly joins the lower end surface 56 of the upper edge 35c of the notch edge 35 and the exposed surface 50a of the reinforcing front plate 45. The welding region 55b extends continuously from the other end of the welding region 55a in the predetermined direction along the end surface 57 of the other edge 35a of the notch edge 35, and linearly joins the end surface 57 of the other edge 35a of the notch edge 35 and the exposed surface 50a of the reinforcing front plate 45. The welding region 55c extends continuously from one end of the welding region 55a in the predetermined direction along the end surface of one side edge 35b of the notch edge 35, and linearly joins the end surface of the other side of the notch edge 35b in the predetermined direction to the exposed surface 50a of the reinforcing front plate 45.
As shown in fig. 5 and 7, in the state where the reinforcing member 40 is disposed at the predetermined mounting position, the rear surface 30a of the inclined front plate portion 30 and the end surface 61 of one edge portion 51 in the predetermined direction of the reinforcing front plate portion 45 are welded, and the rear surface 30a of the inclined front plate portion 30 and the end surface 62 of one end portion 53 in the predetermined direction of the lower edge portion 49 of the reinforcing front plate portion 45 are welded. A welding region (second welding region) 59 between the rear surface 30a of the inclined front plate portion 30 and the end surface 61 of one edge portion 51 of the reinforcing front plate portion 45 extends along one edge portion 51 from a position of the one edge portion 51 of the reinforcing front plate portion 45, which is spaced downward from the lower surface 31a of the inclined upper plate portion 31, to the lower end of the one edge portion 51, and linearly joins the rear surface 30a of the inclined front plate portion 30 and the one edge portion 51 of the reinforcing front plate portion 45. A welding region (fourth welding region) 60 between the rear surface 30a of the inclined front plate portion 30 and the end surface 62 of the one end portion 53 of the lower edge portion 49 of the reinforcing front plate portion 45 extends continuously from the lower end of the welding region 59 (the lower end of one edge portion 51) to the other side in the predetermined direction, and the rear surface 30a of the inclined front plate portion 30 and the one end portion 53 of the lower edge portion 49 of the reinforcing front plate portion 45 are linearly joined. The other end of the welding region 60 in the predetermined direction is disposed at a position away from one side edge 35b of the notch edge 35 of the inclined front plate 30 in the predetermined direction.
As shown in fig. 5 and 7, in a state where the reinforcing member 40 is disposed at the predetermined mounting position, the rear surface 30a of the inclined front plate portion 30 and an end surface (not shown) of the other edge portion 52 in the predetermined direction of the reinforcing front plate portion 45 are welded, and the rear surface 30a of the inclined front plate portion 30 and an end surface 64 of the other end portion 54 in the predetermined direction of the lower edge portion 49 of the reinforcing front plate portion 45 are welded. A welding region (third welding region) 65 between the rear surface 30a of the inclined front plate portion 30 and an end surface (not shown) of the other edge portion 52 of the reinforcing front plate portion 45 extends along the other edge portion 52 from a position of the other edge portion 52 of the reinforcing front plate portion 45, which is spaced downward from the lower surface 31a of the inclined upper plate portion 31, to a lower end of the other edge portion 52, and linearly joins the rear surface 30a of the inclined front plate portion 30 and the other edge portion 52 of the reinforcing front plate portion 45. The welding region (5 th welding region) 66 of the rear surface 30a of the inclined front plate portion 30 and the other end portion 54 of the lower edge portion 49 of the reinforcing front plate portion 45 in the predetermined direction continuously extends from the lower end of the welding region 65 (the lower end of the other edge portion 52) to one side in the predetermined direction, and the rear surface 30a of the inclined front plate portion 30 and the other end portion 54 of the lower edge portion 49 of the reinforcing front plate portion 45 are linearly joined. The end portion of the welding region 66 on one side in the predetermined direction is disposed at a position away from the other edge portion 35a of the cutout edge portion 35 on the other side in the predetermined direction of the inclined front plate portion 30.
Next, the results of simulation of the stress acting on the rear cab mounting bracket 10 using the analytical model A, B, in which the analytical model A, B of 2 rear cab mounting brackets 10 is configured on the computer, will be described. Each of the analytical models A, B includes the rear-cab mounting bracket 10 and the reinforcing member 40, the analytical model a is an analytical model (having the welded region 60) in which the rear surface 30a of the inclined front plate portion 30 of the rear-cab mounting bracket 10 and the one end portion 53 of the lower edge portion 49 of the reinforcing front plate portion 45 of the reinforcing member 40 are joined (the analytical model to which the reinforcing structure according to the present embodiment is applied), and the analytical model B is an analytical model in which the rear surface 30a of the inclined front plate portion 30 of the rear-cab mounting bracket 10 and the one end portion 53 of the lower edge portion 49 of the reinforcing front plate portion 45 of the reinforcing member 40 are not joined (the welded region 60 is not present).
In the simulation regarding the stress acting on the rear cab mounting bracket, in a state where the left support end 23 of the rear cab mounting bracket 10 of the two analysis models A, B is supported, loads of the same magnitude are input in the vehicle width direction to the respective center link portions 27 of the analysis models A, B, and the stress acting on the predetermined region 69 (see fig. 7) on the side closer to the predetermined direction than the notch portion 28 of the inclined front panel portion 30 of the inclined portion 25 on the left side is compared. The predetermined region 69 is a region 69 (hereinafter referred to as a corner-vicinity region 69) in the vicinity of one edge 51 of the reinforcing front plate 45 and a corner 67 (see fig. 7) of the lower edge 49 of the reinforcing member 40 in the rear surface 30a of the inclined front plate 30. The stress acting on the predetermined region is derived by measuring the stresses at a plurality of positions (8 positions in the present simulation) of the corner vicinity region 69 of the inclined front plate portion 30 and calculating the average value of the measured stresses. In this case, the strength of the cab mounting bracket 10 increases as the stress applied to the corner vicinity region 69 of the inclined front panel 30 decreases. As a result, it was confirmed that the stress acting on the corner vicinity region 69 of the inclined front plate 30 in the analysis model a was lower by about 23.4% than that in the analysis model B.
In the reinforcing structure of rear cab mounting bracket 10 configured as described above, in the predetermined mounting position, upper edge portion 68 of reinforcing front plate portion 45 of reinforcing member 40 abuts lower surface 31a of inclined surface portion 31, lower edge portion 49 of reinforcing front plate portion 45 is disposed above lower edge portion 34 of inclined front plate portion 30 and crosses cutout portion 28 of inclined front plate portion 30 along the predetermined direction, both edge portions (one edge portion, the other edge portion) 51, 52 of reinforcing front plate portion 45 in the predetermined direction are disposed on both sides of cutout portion 28 in the predetermined direction and overlap rear surface 30a of inclined front plate portion 30 from behind, and both end portions (one end portion, the other end portion) 53, 54 of lower edge portion 49 of reinforcing front plate portion 45 in the predetermined direction overlap rear surface 30a of inclined front plate portion 30 from behind. That is, since the reinforcing front plate portion 45 of the reinforcing member 40 is joined in a state of overlapping with the region around the cutout portion 28 in the inclined front plate portion 30 of the rear cab assembly bracket 10, the thickness of the reinforcing front plate portion 45 can be increased by the thickness of the reinforcing front plate portion 45 in the region around the cutout portion 28 to reinforce the inclined front plate portion 30, and the strength of the rear cab assembly bracket 10 can be ensured.
Further, one edge 51 of the reinforcing front plate 45 and one end 53 of the lower edge 49 of the reinforcing front plate 45 of the reinforcing member 40 are linearly joined to the rear surface 30a of the inclined front plate 30 on the side closer to the predetermined direction than the notch 28 of the inclined front plate 30 of the rear cab mounting bracket 10. In this manner, since the one edge portion 51 of the reinforcing front plate portion 45 and the one end portion 53 of the lower edge portion 49 of the reinforcing front plate portion 45 of the reinforcing member 40 are joined to the rear surface 30a of the inclined front plate portion 30 on the one side in the predetermined direction of the inclined front plate portion 30, the strength of the corner vicinity area 69 of the inclined front plate portion 30 can be increased as compared with the case where the one end portion 53 of the lower edge portion 49 of the reinforcing front plate portion 45 is not joined. Therefore, as a result of the above simulation, when a force in a direction (in the present embodiment, the vehicle width direction) substantially on the same plane as the inclined front plate portion 30 and intersecting the predetermined direction is input to the other side of the inclined front plate portion 30 of the rear cab mounting bracket 10 in the predetermined direction, it is possible to reduce the stress acting on the corner vicinity region 69 on the one side of the inclined front plate portion 30 in the predetermined direction, and to prevent the rear cab mounting bracket 10 from being damaged.
Therefore, according to the present embodiment, the strength of the rear cab mounting bracket 10 in which the interference portion with the other vehicle-mounted component (EGR pipe 70) is cut off can be ensured.
The reinforcing member 40 is disposed in the internal space 36 of the left inclined portion 25, the cut edge portion 35 of the inclined front plate portion 30 overlaps the front surface 50 of the reinforced front plate portion 45 from the front, and the exposed surface 50a of the reinforced front plate portion 45 and the welding area 55 of the cut edge portion 35 of the inclined front plate portion 30 are exposed to the front of the rear cab attachment bracket 10. Therefore, for example, unlike the case where the reinforcing front plate portion 45 is disposed on the front surface side of the inclined front plate portion 30 and the welding region 55 between the reinforcing front plate portion 45 and the cutout edge portion 35 of the inclined front plate portion 30 is provided on the side of the internal space 36 of the rear cab mounting bracket 10, the welding wire can be prevented from interfering with other portions (for example, the inclined rear plate portion 32 and the like) of the rear cab mounting bracket 10 during welding, and the welding wire can be easily brought into contact with the welding region 55, thereby enabling easy welding.
In the present embodiment, the cutout portion 28 is provided in the left inclined portion 25 of the rear cab mounting bracket 10, and the reinforcing member 40 is joined to the left inclined portion 25, but the present invention is not limited to this, and for example, the cutout portion 28 may be provided in the right inclined portion 26, and the reinforcing member 40 may be joined to the right inclined portion 26.
In the present embodiment, the lower end of the welding region 59 (the lower end of one edge 51) joining the rear surface 30a of the inclined front plate portion 30 and one edge 51 of the reinforcing front plate portion 45 is connected to the end of the welding region 60 joining the rear surface 30a of the inclined front plate portion 30 and the end surface 62 of the one end 53 of the lower edge 49 of the reinforcing front plate portion 45 in the predetermined direction. The lower end of the welding region 59 (the lower end of one edge portion 51) may not be connected to (separated from) the end of the welding region 60 on one side in the predetermined direction.
In the present embodiment, the rear surface 30a of the inclined front plate portion 30 and the both end portions 53 and 54 of the lower edge portion 49 of the reinforcing front plate portion 45 are linearly joined, but the present invention is not limited thereto. For example, as shown in the present embodiment, when it is desired to secure the strength of the inclined front plate portion 30 on the one side in the predetermined direction with respect to the notch portion 28 with respect to the load input in the vehicle width direction to the center connecting portion 27 in the state where the left support end portion 23 is supported, the rear surface 30a of the inclined front plate portion 30 on the one side in the predetermined direction with respect to the notch portion 28 and the one end portion 53 of the lower edge portion 49 of the reinforcing front plate portion 45 may be joined, or the rear surface 30a of the inclined front plate portion 30 on the other side in the predetermined direction with respect to the notch portion 28 and the other end portion 54 of the lower edge portion 49 of the reinforcing front plate portion 45 may not be joined.
The present disclosure has been described above based on the above embodiments, but the present disclosure is not limited to the above embodiments, and it goes without saying that the present disclosure can be modified as appropriate within a range beyond the present disclosure. That is, other embodiments, examples, operation techniques, and the like, which are made by those skilled in the art based on the embodiments, are of course all included in the scope of the present disclosure.
For example, in the above-described embodiment, the reinforcing structure of the vehicle member according to the present disclosure is applied to the rear cab mounting bracket 10, but may be applied to another vehicle member (for example, the floating member 13).
In the above-described embodiment, the reinforcing structure for a vehicle member according to the present disclosure is applied to a vehicle member (rear cab mounting bracket 10) having a hat-shaped cross section, but may be applied to a vehicle member having another cross-sectional shape (for example, an L-shaped or flat plate-shaped cross section).
In the above embodiment, the predetermined direction in which the plate-shaped portion (the inclined front plate portion 30) extends is set to a direction inclined with respect to the vehicle width direction from the lower side on the vehicle width direction outer side to the upper side on the vehicle width direction inner side (or from the upper side on the vehicle width direction inner side to the lower side on the vehicle width direction outer side), but the predetermined direction in which the plate-shaped portion extends is not limited to the above direction.
In the above embodiment, the reinforcing structure of the vehicle member according to the present disclosure is applied to the vehicle member extending in the predetermined direction and having the plate-shaped portion (the inclined front plate portion 30) supporting both sides in the predetermined direction on the vehicle body side, but the reinforcing structure of the vehicle member according to the present disclosure may be applied to a vehicle member having a plate-shaped portion supporting at least one side in the predetermined direction on the vehicle body side. Even in this case, when a force in a direction substantially on the same plane as the plate-shaped portion and intersecting the predetermined direction is input to the other side of the plate-shaped portion in the predetermined direction, it is possible to reduce stress acting on the one side of the plate-shaped portion in the predetermined direction and prevent damage to the vehicle member.
In the above embodiment, the reinforcing member for a vehicle according to the present disclosure is applied to a vehicle member extending in a predetermined direction and having a plate-shaped portion (inclined front plate portion 30) intersecting with the front-rear direction, but may be applied to, for example, a vehicle member extending in a predetermined direction and having a plate-shaped portion intersecting with the vertical direction or a vehicle member extending in a predetermined direction and having a plate-shaped portion intersecting with the vehicle width direction. Even in this case, when a force in a direction substantially on the same plane as the plate-shaped portion and intersecting the predetermined direction is input to the other side of the plate-shaped portion in the predetermined direction, it is possible to reduce stress acting on the one side of the plate-shaped portion in the predetermined direction (the side on which the vehicle body side is supported), and to prevent breakage of the vehicle member.
The present application was made in view of the japanese patent application laid-open at 30/3/2016 (patent application 2016-.
Industrial applicability of the invention
The present invention has an effect of ensuring the strength of a vehicle member from which an interfering portion with another vehicle-mounted component is cut off, and can be used for a reinforcing structure of a vehicle member and the like.
Description of the reference symbols
3: engine
4: vehicle body frame
6: rear cab support
Rear cab assembly bracket (vehicle component)
11 rear part of cab
19 longitudinal plate part at front side of rear cab assembly bracket
25 inclined part on left side
28 cut part
30 inclined front plate part (plate-shaped part)
30a rear surface of the inclined front plate (one surface of the plate-shaped portion)
34 lower edge of inclined front plate (edge of plate along predetermined direction)
35 cutting edge part
40 reinforcing member
45 reinforced front plate part (reinforcing plate)
49 reinforcing the lower edge portion of the front plate portion (edge portion of the reinforcing plate along the predetermined direction) 50 reinforcing the front surface of the front plate portion (surface of the reinforcing plate)
51 reinforcing one edge of the front plate in a predetermined direction
52 reinforcing the other edge part of the front plate part in the predetermined direction
53 reinforcing one end portion of the lower edge portion of the front plate portion in a predetermined direction
54 reinforcing the other end of the lower edge of the front plate in a predetermined direction
55 welding zone (first welding zone)
59 welding zone (second welding zone)
60 welding zone (fourth welding zone)
65 welding zone (third welding zone)
Claims (4)
1. A reinforcing structure for a vehicle member, characterized by comprising:
a vehicle member includes a first member plate portion having a flat plate shape extending in a predetermined direction, a second member plate portion, and a third member plate portion, the second member plate portion extends in the predetermined direction at a position spaced apart from the first member plate portion and faces the first member plate portion, the third member plate portion extends in the predetermined direction and connects an edge portion of the first member plate portion and an edge portion of the second member plate portion, the first member plate portion, the second member plate portion, and the third member plate portion define an internal space, a notch edge portion is provided on the first member plate portion, a cutout portion formed by cutting out an edge portion of the first member plate portion on the opposite side of the third member plate portion, at least one side of the first member plate portion in the predetermined direction being supported on the vehicle body side;
a reinforcement member that reinforces the vehicle member, and that includes a first reinforcement plate, a second reinforcement plate, and a third reinforcement plate, the first reinforcement plate being disposed along the first member plate portion in the internal space of the vehicle member at a predetermined attachment position that covers a part of the cutout portion and being joined to the first member plate portion at the attachment position by welding, the second reinforcement plate being disposed along the second member plate portion at a position apart from the first reinforcement plate, facing the first reinforcement plate, being joined to the second member plate portion by welding, the third reinforcement plate being disposed along the third member plate portion in the internal space and joining an edge portion of the first reinforcement plate and an edge portion of the second reinforcement plate;
the cut edge portion of the first member plate portion includes a first edge portion that defines one side of the cut portion in the predetermined direction, a second edge portion that defines the other side of the cut portion in the predetermined direction, and a third edge portion that extends in the predetermined direction between the first edge portion and the second edge portion of the first member plate portion and connects the first edge portion and the second edge portion;
a welding region between the first member plate portion and the first reinforcing plate includes a first welding region, a second welding region, a third welding region, and a fourth welding region,
in a state where the first reinforcing plate is disposed at the mounting position, a surface of the first member plate portion on the side of the internal space is in surface contact with a surface of the first reinforcing plate, both edge portions of the first reinforcing plate in the predetermined direction are overlapped with the surface of the first member plate portion, the cut edge portion of the first member plate portion is overlapped with the surface of the first reinforcing plate, one edge portion of the first reinforcing plate in the predetermined direction crosses the cut portion in the predetermined direction, both end portions of the first reinforcing plate in the predetermined direction are overlapped with the surface of the first member plate portion,
the first welding region linearly joins the first edge portion, the second edge portion, and the third edge portion of the first member plate portion to the surface of the first reinforcing plate,
the second welding region linearly joins the one side edge portion of the first reinforcing plate in the predetermined direction to the one surface of the first member plate portion,
the third welding region linearly joins the edge portion of the other side of the first reinforcing plate in the predetermined direction to the one surface of the first member plate portion,
the fourth welding region linearly joins the one end portion of the one edge portion of the first reinforcing plate in the predetermined direction to the one surface of the first member plate portion,
an edge of the second reinforcing plate along the predetermined direction is joined to a surface of the second member plate portion on the side of the internal space.
2. The reinforcing structure of a vehicle structural member as recited in claim 1,
the surface of the first reinforcing plate has a first portion that is in surface-to-surface contact with the one surface of the first member plate portion in a state where the first reinforcing plate is disposed at the mounting position, and a second portion that is exposed from the first member plate portion.
3. The reinforcing structure of a vehicle structural member as recited in claim 2,
the first welding region joins the second portion of the surface of the first reinforcing plate to the third edge of the first member plate portion.
4. The reinforcing structure of a vehicle structural member as recited in claim 1,
the first reinforcing plate is exposed from the first member plate portion at a portion other than the two end portions in the one edge portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-068898 | 2016-03-30 | ||
| JP2016068898A JP6663590B2 (en) | 2016-03-30 | 2016-03-30 | Reinforcement structure for vehicle members |
| PCT/JP2017/012313 WO2017170358A1 (en) | 2016-03-30 | 2017-03-27 | Reinforcement structure for vehicle member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108778906A CN108778906A (en) | 2018-11-09 |
| CN108778906B true CN108778906B (en) | 2021-04-23 |
Family
ID=59965577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780018260.3A Active CN108778906B (en) | 2016-03-30 | 2017-03-27 | Reinforcing structure for vehicle member |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6663590B2 (en) |
| CN (1) | CN108778906B (en) |
| WO (1) | WO2017170358A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7323469B2 (en) * | 2020-01-22 | 2023-08-08 | 日野自動車株式会社 | vehicle frame structure |
| JP7219421B2 (en) * | 2020-02-05 | 2023-02-08 | いすゞ自動車株式会社 | Cab suspension support structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6332052Y2 (en) * | 1980-10-16 | 1988-08-26 | ||
| JPS63142275U (en) * | 1987-03-11 | 1988-09-20 | ||
| JP4539480B2 (en) * | 2005-08-01 | 2010-09-08 | マツダ株式会社 | Upper body structure of automobile |
| DE102011113675A1 (en) * | 2011-09-20 | 2013-03-21 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Reinforcement structure for reinforcing a side wall structure for a motor vehicle in the region of a door cutout |
| CN203186422U (en) * | 2013-03-20 | 2013-09-11 | 上海同捷科技股份有限公司 | Car body longitudinal beam local reinforcing structure |
-
2016
- 2016-03-30 JP JP2016068898A patent/JP6663590B2/en active Active
-
2017
- 2017-03-27 WO PCT/JP2017/012313 patent/WO2017170358A1/en active Application Filing
- 2017-03-27 CN CN201780018260.3A patent/CN108778906B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017170358A1 (en) | 2017-10-05 |
| JP6663590B2 (en) | 2020-03-13 |
| CN108778906A (en) | 2018-11-09 |
| JP2017178067A (en) | 2017-10-05 |
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