JP7173323B2 - body frame - Google Patents

Description

The present disclosure relates to vehicle body frames.

Patent Literature 1 discloses a vehicle body structure for a vehicle equipped with a tank. Such a vehicle body structure includes a spare tire fixed to a vehicle frame, a guard bar extending in the vehicle width direction behind the spare tire and fixed to the frame, and a tank arranged behind the spare tire and above the guard bar. and

Patent Document 2 discloses a tank/cross member that can be used both as a tank and as a cross member. Such a tank-cum-cross member has an internal space formed inside a housing connected to a pair of left and right side members.

JP 2017-94885 A Japanese Patent Application Laid-Open No. 2018-203091

In the vehicle body structure (body frame) disclosed in Patent Document 1, since the tank is arranged behind the spare tire and above the guard bar, the pair of side members are opened at the rear in the longitudinal direction of the vehicle, and the rigidity is efficiently increased. cannot be raised.

The tank-cum-cross member (vehicle frame) disclosed in Patent Document 2 is watertight because an internal space is formed inside the housing, and fuel, reducing agent, cooling water, lubricating oil, cleaning liquid, etc. are stored. is required, and the rigidity cannot be efficiently increased.

In view of the circumstances described above, at least one embodiment of the present invention aims to provide a vehicle body frame that can efficiently increase the rigidity in the rear portion of the vehicle in the front-rear direction.

(1) A vehicle body frame according to at least one embodiment of the present invention includes a pair of side members provided along the vehicle front-rear direction on both sides in the vehicle width direction, and a pair of side members spanning between the pair of side members. and a cross member fixed to the side members of the vehicle, the cross member being curved to gradually retreat rearward in the vehicle front-rear direction from the pair of side members toward the inside in the vehicle width direction at a front edge that is forward in the vehicle front-rear direction. A tank that has a portion and stores a liquid is accommodated.

According to the configuration (1) above, the cross member has, at least at its front edge in the vehicle front-rear direction, a curved portion that gradually retreats rearward in the vehicle front-rear direction from the pair of side members toward the inside in the vehicle width direction. The rigidity of the vehicle body frame can be efficiently increased. In addition, since the tank is accommodated in the cross member, the rigidity of the cross member can be further increased and the tank can be protected from damage caused by flying stones or the like.

(2) In one embodiment, in the configuration of (1) above, the cross member is provided rearward of the rear wheel in the vehicle front-rear direction, and is provided at the rear edge, which is rear in the vehicle front-rear direction, from the pair of side members across the width of the vehicle. It has a bulging portion that bulges rearward in the vehicle front-rear direction from the rear ends of the pair of side members toward the direction inner side.

According to the configuration (2) above, the cross member extends inward in the vehicle width direction from the pair of side members toward the rear edge in the vehicle front-rear direction and extends rearward in the vehicle front-rear direction beyond the rear ends of the pair of side members. Since the bulging portion is provided, the rigidity of the vehicle body frame can be further efficiently increased behind the rear wheels in the longitudinal direction of the vehicle. Also, in the case of a collision from the rear of the vehicle, the cross member receives the collision load before the side member, so damage to the side member is reduced.

(3) In one embodiment, in the configuration of (2) above, the bulging portion is attached to the pair of side members and bulges rearward in the vehicle front-rear direction from a guard bar provided below the cross member. ing.

According to the configuration (3) above, the protruding portion of the cross member is attached to the pair of side members and protrudes rearward in the vehicle front-rear direction from the guard bar provided below the cross member. The guard bar prevents the cross member from contacting the ground, and in the event of a collision from the rear of the vehicle, the bulging portion of the cross member receives the collision load before the guard bar, so the load is transmitted to the side members through the guard bar. load is reduced.

(4) In one embodiment, in any one of the configurations (1) to (3) above, the tank is a urea water tank for storing urea water for purifying vehicle exhaust gas, and the urea water is A pump provided in the storage space of the tank is positioned in the rear upper region of the exhaust pipe in the longitudinal direction of the vehicle.

According to configuration (4) above, the pump provided in the storage space of the aqueous urea tank is located in the rearward upper region of the exhaust pipe in the longitudinal direction of the vehicle, so freezing of the aqueous urea in the vicinity of the pump is suppressed.

(5) In one embodiment, in any one of the above configurations (1) to (4), the curved portion is formed on the outer peripheral surface of a spare tire that is mounted in a laterally lying position forward of the cross member in the vehicle front-rear direction. provided along.

According to the configuration (5) above, the curved portion is provided along the spare tire that is mounted on the front side of the cross member in the longitudinal direction of the vehicle in a sideways posture, so that the spare tire can be efficiently mounted. In addition, since the curved portion is provided along the spare tire, when the cross member is pushed forward in the longitudinal direction of the vehicle due to a rear collision, the contact surface with the spare tire becomes wider, dispersing the impact of the rear collision. be done.

(6) In one embodiment, in the configuration of any one of (1) to (5) above, the cross member has an opening at the top in the vehicle vertical direction to accommodate the tank, and the tank and the edge of the opening. An insulator is provided between the parts.

According to the configuration (6) above, the insulator is provided between the tank and the edge of the opening to prevent sand, mud, etc. from accumulating between the cross member and the tank, and to prevent the intrusion of exhaust heat. can be prevented.

According to at least one embodiment of the present invention, the rigidity of the vehicle body frame can be efficiently increased behind the rear wheels in the longitudinal direction of the vehicle.

1 is a plan view schematically showing a main part of a vehicle employing a body frame according to an embodiment of the invention; FIG. FIG. 2 is a side view showing a main part of the vehicle shown in FIG. 1; 2 is a perspective view of the cross member shown in FIG. 1; FIG. 4 is a plan view of the cross member shown in FIG. 3; FIG. FIG. 4 is a perspective view showing the cross member shown in FIG. 3 and a tank housed in the cross member; FIG. 4 is a plan view showing the cross member shown in FIG. 3 and a tank housed in the cross member;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, and are merely illustrative examples. do not have.

A vehicle 100 using the body frame 1 according to the embodiment of the present invention is, for example, a pickup truck type sport utility vehicle (SUV (Sport Utility Vehicle)). A separate frame structure is adopted in which a body (not shown) is placed on the body. A vehicle 100 having a separate frame structure has, for example, a cabin (vehicle room) (not shown) in which passengers can ride on the front side of the vehicle in the front-rear direction, and a cargo bed (not shown) on which luggage can be loaded at the rear side of the cabin. ) are installed.

As shown in FIGS. 1 and 2, the vehicle body frame 1 according to the embodiment of the present invention is, for example, a ladder frame (ladder-type frame) and includes a pair of side members 11L and 11R and a plurality of cross members 12. ing. The pair of side members 11L and 11R are hollow tubular structural members that are spaced apart in the vehicle width direction, and are provided along the vehicle front-rear direction on both sides in the vehicle width direction. The plurality of cross members 12 are structural members that connect the pair of side members 11L and 11R in a ladder-like manner. It is fixed to 11L and 11R.

Among the plurality of cross members 12, a cross member 12G (hereinafter referred to as "cross member 12G") located at the rearmost position in the longitudinal direction of the vehicle is suspended between the pair of side members 11L and 11R behind the rear wheel 120 in the longitudinal direction of the vehicle. It is passed over and fixed to a pair of side members 11L and 11R.

The cross member 12G has a curved portion 12a at least at the front edge in the front-rear direction, which gradually retreats rearward in the vehicle front-rear direction from the pair of side members 11L and 11R toward the inside in the vehicle width direction. The cross member 12G spans the rear ends of the pair of side members 11L and 11R and is fixed to the rear ends of the pair of side members 11L and 11R.

According to the vehicle body frame 1 according to the embodiment of the present invention described above, the cross member 12G gradually extends inward in the vehicle width direction from the pair of side members 11L and 11R at least at the front edge in the vehicle front-rear direction. Since it has the curved portion 12a that recedes rearward, the rigidity of the body frame 1 can be efficiently increased behind the rear wheel 120 in the longitudinal direction of the vehicle.

As shown in FIGS. 1 and 2, in the vehicle body frame 1 according to the embodiment of the present invention, the above-described cross member 12G is provided at the rear edge in the vehicle front-rear direction, and is positioned inside the pair of side members 11L and 11R in the vehicle width direction. , and has a bulging portion 12b that bulges rearward in the vehicle front-rear direction from the rear ends of the pair of side members 11L and 11R. As described above, the cross member 12G spans the rear ends of the pair of side members 11L and 11R and is fixed to the rear ends of the pair of side members 11L and 11R. Therefore, the bulging portion 12b is located behind the rear ends of the pair of side members 11L and 11R. The impact from rear impact is mitigated. As a result, even if the vehicle 100 is rear-ended, damage to the body frame 1 (the pair of side members 11L and 11R) due to the rear-end collision can be suppressed.

Further, for example, the bulging portion 12b is formed to bulge rearward in the vehicle front-rear direction from a guard bar 150, which will be described later. Therefore, when the vehicle 100 is rear-impacted, the bulging portion 12b of the cross member 12G hits first, and the impact caused by the rear-end collision is alleviated. .

According to the vehicle body frame 1 according to the embodiment of the present invention described above, the cross member 12G has the pair of side members 11L extending inward in the vehicle width direction from the pair of side members 11L and 11R at the rear edge in the vehicle front-rear direction. , 11R, the rigidity of the vehicle body frame 1 can be further efficiently increased behind the rear wheels 120 in the vehicle front-rear direction. In addition, since the bulging portion 12b is located behind the rear ends of the pair of side members 11L and 11R, even if the vehicle 100 is rear-collided, the vehicle body frame 1 (the pair of side members 11L and 11R) is not affected by the rear-collision. damage can be minimized.

As shown in FIGS. 3 and 4, in the vehicle body frame 1 according to the embodiment of the present invention, the above-described cross member 12G is formed in a container shape and has a housing space HS that opens upward in the vehicle vertical direction. The accommodation space HS has an inner wall surface (front surface) 12aw on the front side in the vehicle front-rear direction formed by a curved surface that gradually recedes rearward in the vehicle front-rear direction from the outside in the vehicle width direction toward the inside. A wall surface (rear surface) 12bw is a curved surface that bulges rearward in the vehicle front-rear direction from the outside in the vehicle width direction.

A lower half of the tank (urea water tank) 2 can be accommodated in the accommodation space HS, and the cross member 12G constitutes an outer shell covering the lower half of the tank 2 accommodated in the accommodation space HS. Therefore, the cross member 12G covers the lower half of the tank 2 and also functions as a tank protector that protects the tank 2 from heat such as flying stones and exhaust heat (hereinafter, the "cross member 12G" is referred to as the "tank protector 12G"). ).

As shown in FIG. 5, a storage space for storing liquid is provided in a tank 2 (hereinafter referred to as "tank 2") whose lower half is stored in the storage space HS. The liquid stored in the tank 2 is, for example, an NOX reducing agent, such as urea water. Urea water is the NOX reducing agent used in the urea SCR system. The urea SCR system is one of the exhaust gas cleaning technologies, and it cleans nitrogen oxides (NOX) contained in the exhaust gas of diesel engines. In the urea SCR system, urea water is injected upstream of a NOx selective reduction catalyst provided on the exhaust passage, and nitrogen oxides are reduced to nitrogen using ammonia (NH ₃ ) produced by hydrolysis of urea as a reducing agent. be done.

The tank 2 is a container whose lower half is provided along the accommodation space HS, and is made of metal or resin, for example. Like the tank protector 12G, the tank 2 is provided along the width direction of the vehicle and has an outer shape slightly smaller than the housing space HS. The tank 2 has, for example, a crescent shape when viewed from above and has a thickness in the height direction. Therefore, the tank 2 has a front surface 2a, which is forward in the vehicle longitudinal direction, and a curved surface that gradually recedes rearward in the vehicle longitudinal direction from the outside in the vehicle width direction toward the inside, and a rear surface 2b, which is the rear in the vehicle longitudinal direction, is formed by a curved surface. The curved surface is configured such that the inner side protrudes rearward in the vehicle front-rear direction more than the outer side.

The lower surface 2c of the tank 2 is provided with a hole (not shown) for accommodating the pump module 3 in the storage space. For example, a hole provided in the bottom surface of the tank 2 is provided in a portion (not shown) that bulges further downward from the bottom surface of the tank 2 . For example, the portion that bulges downward from the lower surface of the tank 2 is arranged to be biased to the right side in the vehicle width direction.

For example, the tank 2 is configured by watertightly joining a lower half portion 2d (hereinafter referred to as "lower half portion 2d") and an upper half portion 2e (hereinafter referred to as "upper half portion 2e"). The lower half 2d is a container with an open top and has a flange 2d1 at the edge of the opening. The upper half part 2e is a container whose lower surface is open opposite to the lower half part 2d. ing.

Further, the tank 2 is provided with a through hole 2f for attaching the tank 2 to the tank protector 12G. For example, two through-holes 2f are provided at the front edge of the main body of the tank 2 in the front-rear direction of the vehicle, and two at the rear edge of the main body in the rear-rear direction of the vehicle.

A pump module (pump) 3 is accommodated in the storage space of the tank 2 through a hole provided in the lower surface of the tank 2 described above, and the pump module 3 is fitted into the hole provided in the lower surface of the tank 2 to allow the pump to be installed in the tank 2. Module 3 is attached. The pump module 3 can supply the urea water stored in the tank 2 to an exhaust system (for example, a urea water injector provided in the exhaust passage). The pump module 3 includes, for example, a pump (not shown), a heater (not shown) for heating the urea water to an appropriate temperature, a filter (not shown) for removing foreign substances in the urea water, It includes a temperature sensor (not shown) for detecting temperature and a remaining amount sensor (not shown) for detecting the remaining amount of urea water in the tank.

The tank protector 12G described above is provided with a hole 12c through which the pump module 3 is exposed. A hole 12c provided in the tank protector 12G is a hole one size larger than the pump module 3 and provided at a position overlapping the pump module 3 attached to the tank 2, and the pump module 3 is exposed through the hole 12c. . For example, the hole 12c provided in the tank protector 12G is located on the right side of the tank protector 12G in the vehicle width direction, and the pump module 3 is located above the exhaust pipe 140 in the vehicle front-rear direction rearward region.

Further, for example, bolts 12d for attaching the tank 2 to the tank protector 12G are provided at the bottom defining the accommodation space HS of the tank protector 12G described above. The bolt 12d is provided at a position corresponding to the through hole 2f provided in the tank 2, passes through the through hole 2f of the tank 2 whose lower half portion is accommodated in the accommodation space HS of the tank protector 12G, and passes through the nut 12e (see FIG. 6). reference). As a result, the tank 2 is attached to the tank protector 12G, and the tank 2 is fixed to the tank protector 12G (see FIG. 6).

As shown in FIG. 5, for example, an insulator for filling a gap between the tank protector 12G and the tank 2 is provided inside the opening edge portion on the vehicle width direction right side of the tank protector 12G corresponding to the hole 12c provided in the tank protector 12G. 4 is provided. The insulator 4 is made of an elastic or plastic material such as urethane, for example, and prevents sand, mud, etc. from accumulating between the tank protector 12G and the tank 2, and also prevents exhaust heat from entering. .

Further, for example, mounting portions (side member mounting portions) 12f are provided on both sides in the vehicle width direction of the tank protector 12G. The mounting portion 12f is provided, for example, along the opening edge of the tank protector 12G (the edge of the housing space HS whose upper surface is open). The mounting portion 12f is a plate-like body extending outward in the vehicle width direction from the tank protector 12G. For example, the mounting portion 12f is joined to the tank protector 12G by welding a member obtained by bending a metal plate at right angles to the metal tank protector 12G. It is

Further, for example, the tank protector 12G is bridged between the pair of side members 11L and 11R, and the tank protector 12G is fixed to the pair of side members 11L and 11R. In the vehicle body frame 1 according to the embodiment of the present invention, for example, the tank protector 12G is attached to the lower surfaces of the pair of side members 11L and 11R via spacers (not shown).

As shown in FIGS. 1 and 2, a vehicle that employs the vehicle body frame 1 according to the embodiment of the present invention can have a spare tire 110 lying sideways under the loading platform. The spare tire 110 is located between the pair of side members 11L and 11R, behind the axle 121 of the rear wheel 120 in the front-rear direction, and ahead of the tank protector 12G (hereinafter referred to as "spare tire (hereinafter referred to as “mounting area”).

For example, the position of the spare tire mounting area in the longitudinal direction of the vehicle is set so that the spare tire 110 is as far forward as possible within the range where the spare tire 110 does not interfere with the axle 121 of the rear wheel 120 and the differential device 130 . Further, for example, the position of the spare tire mounting area in the vehicle width direction is set so as to secure a predetermined distance from the exhaust pipe 140 . In a vehicle 100 that employs the body frame 1 according to the embodiment of the present invention, the exhaust pipe 140 is arranged to be biased to the right (upper side in FIG. 1) of the center line of the body frame 1, and the spare tire mounting area is located on the body frame. 1 is biased to the left side (lower side in FIG. 1) of the center line.

In the vehicle 100 that employs the vehicle body frame 1 that employs the embodiment of the present invention, the spare tire 110 mounted in the spare tire mounting area is a cross member that traverses substantially the center of the spare tire mounting area along the vehicle width direction. 12F (hereinafter referred to as "spare tire bracket 12F") is detachably attached. The upper surface of the spare tire 110 attached to the spare tire bracket 12F is positioned lower than the upper surface of the vehicle body frame 1 and does not interfere with the loading platform installed on the vehicle body frame 1.例文帳に追加

The lower surface of the spare tire 110 attached to the spare tire bracket 12F is located lower than the lower surface of the vehicle body frame 1, and the spare tire 110 is grounded first, thereby preventing the vehicle body frame 1 from grounding. .

As shown in FIGS. 1 and 2, in the vehicle body frame 1 according to the embodiment of the present invention, the above-described tank protector 12G includes the above-described spare tire mounting area and a bumper (not shown) provided behind the vehicle in the longitudinal direction. and (hereinafter referred to as "cross member installation area"). The cross member installation area curves along the spare tire 110 mounted in the spare tire mounting area and is provided so as not to interfere with the bumper.

In the vehicle body frame 1 according to the embodiment of the present invention, the curved portion 12a provided at the front edge of the tank protector 12G described above is provided along the spare tire 110 which is mounted in a sideways position in front of the tank protector 12G in the vehicle front-rear direction. be done.

According to the vehicle body frame 1 according to the embodiment of the present invention described above, the curved portion 12a provided at the front edge of the tank protector 12G described above corresponds to the spare tire 110 which is mounted in a sideways position forward of the tank protector 12G in the vehicle front-rear direction. , the spare tire 110 can be efficiently mounted.

As shown in FIG. 2, in the vehicle body frame 1 according to the embodiment of the present invention, the upper surface of the tank 2 whose lower half is accommodated in the accommodation space HS is positioned lower than the upper surfaces of the side members 11L and 11R. There is no interference with the loading platform installed on the body frame 1.

Further, in the vehicle body frame 1 according to the embodiment of the present invention, the lower surface of the tank protector 12G described above is positioned higher than the lower surface of the spare tire 110 mounted in the spare tire mounting area, and the tank protector 12G is located above the spare tire 110. I try not to interfere with the ground before.

As shown in FIG. 2, a vehicle 100 employing the vehicle body frame 1 according to the embodiment of the invention includes a guard bar 150. As shown in FIG. The guard bar 150 defines a departure angle (angle at which the rear portion of the vehicle 100 may touch the ground). In order to prevent the tank protector 12G, which is installed behind the wheel 120, from touching the ground, the tank protector 12G is provided in the vehicle front-rear direction rear lower region. The guard bar 150 is positioned lower than the lower surface of the spare tire 110 mounted in the spare tire mounting area described above. I have to. Guard bar 150 is a hollow or solid bar (round bar) and is provided along the width direction of the vehicle. For example, the guard bar 150 is attached and fixed to the side members 11L and 11R via brackets 151L and 151R. By providing the guard bar 150 in this way, when the departure angle regulated by the guard bar 150 is exceeded, the guard bar 150 first touches the ground. can determine whether

The present invention is not limited to the above-described embodiments, and includes modifications of the above-described embodiments and modes in which these modes are combined as appropriate.

1 body frame 11L, 11R side member 12 cross member 12F cross member (spare tire bracket)
12G cross member (tank protector)
12a curved portion 12aw inner wall surface (front surface)
12b bulging portion 12bw inner wall surface (rear surface)
12c hole 12d bolt 12e nut 12f mounting portion (side member mounting portion)
HS accommodation space 2 tank (urea water tank)
2a front surface 2b rear surface 2c lower surface 2d lower half portion (lower half portion)
2d1 Flange 2e upper half (upper half)
2e1 flange 2f through hole 3 pump module (pump)
4 insulator 100 vehicle 110 spare tire 120 rear wheel 121 rear wheel axle 130 differential device 140 exhaust pipe 150 guard bars 151L, 151R bracket

Claims (6)

a pair of side members provided along the vehicle front-rear direction on both sides in the vehicle width direction;
a cross member bridged between the pair of side members and fixed to the pair of side members;
with
The cross member has a front edge that is forward in the vehicle front-rear direction and has a curved portion that gradually recedes rearward in the vehicle front-rear direction from the pair of side members toward the inside in the vehicle width direction. has a storage space where
The vehicle body frame, wherein the tank is provided in the accommodation space of the cross member along the width direction of the vehicle. The cross member is provided rearward of rear wheels in the vehicle front-rear direction, and extends from the pair of side members toward the inside in the vehicle width direction at a rear edge, which is rearward in the vehicle front-rear direction, from the rear end of the pair of side members to the vehicle. 2. The vehicle body frame according to claim 1, further comprising a bulging portion that bulges rearward in the front-rear direction. 3. The vehicle body frame according to claim 2, wherein the bulging portion is attached to the pair of side members and bulges rearward in the vehicle front-rear direction from a guard bar provided below the cross member. The tank is a urea water tank in which urea water for purifying vehicle exhaust gas is stored,
4. The body frame according to any one of claims 1 to 3, wherein a pump provided in the storage space of the aqueous urea tank is positioned in a rear upper region of the exhaust pipe in the longitudinal direction of the vehicle. The vehicle body frame according to any one of claims 1 to 4, wherein the curved portion is provided along an outer peripheral surface of a spare tire that is mounted on the front side of the cross member in a vehicle front-rear direction in a sideways position. . The cross member has an opening at the top in the vertical direction of the vehicle to accommodate the tank,
The vehicle body frame according to any one of claims 1 to 5, wherein an insulator is provided between the tank and the edge of the opening.

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