JP7354016B2 - vehicle roof structure - Google Patents

Description

The present invention relates to a roof structure for a vehicle that includes a roof panel located at the upper end of a vehicle body and a pair of frame members located below the roof panel in the vehicle.

Patent Document 1 discloses an example of a roof structure for a vehicle in which a sunroof opening is provided in a roof panel. The roof structure includes a rail assembly that slidably supports the sunroof shade along the longitudinal direction of the vehicle. Thereby, the sunroof shade can be opened and closed with respect to the sunroof opening.

In the vehicle roof structure disclosed in Patent Document 1, a roof panel and a rail assembly are each individually joined to a frame member of a vehicle body by welding or the like. Additionally, both the mass and volume of the rail assembly are small relative to the mass and volume of the roof panel. Therefore, the natural frequency of the rail assembly is generally greater than the natural frequency of the roof panel. Here, when the resonance between the vehicle body frame members and the roof panel and the resonance between the frame members and the rail assembly become significant due to vibrations when the vehicle is running, the vehicle in each resonance state becomes It is required to reduce the vibration level. In this case, individual measures such as providing a damper mechanism for each of the roof panel and rail assembly are required. Therefore, there is a problem that the number of parts required for the countermeasure increases excessively.

Japanese Patent Application Publication No. 2013-249009

An object of the present invention is to provide a roof structure for a vehicle that can reduce the vibration level of the vehicle in a resonance state without causing an excessive increase in the number of parts.

The roof structure of a vehicle provided by the present invention includes a skeletal member that forms the frame of a vehicle body, a roof panel that is joined to the upper end of the skeletal member and closes a passenger compartment from above the vehicle, and a roof panel that is located below the roof panel. a pair of frame members located apart from each other in the vehicle width direction and joined to the frame member, the frame member including a pair of front pillars and a pair of rear pillars in the vehicle longitudinal direction. and a first area located in front of the vehicle from one of the at least one pair of intermediate pillars, and the first area. a second region located further rearward of the vehicle, each of the pair of frame members extending along the longitudinal direction of the vehicle and joined to at least one of the first region and the second region. and at least one of the rigidity required for joining each of the pair of frame members and the roof panel and the rigidity of each of the pair of frame members is the same as that of each of the pair of frame members and the skeleton member. It is characterized by lower rigidity than that required for joining.

According to the vehicle roof structure according to the present invention, it is possible to reduce the vibration level of the vehicle in a resonance state without causing an excessive increase in the number of parts.

Other features and advantages of the invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

1 is a perspective view of a vehicle body including a vehicle roof structure according to an embodiment of the present invention. It is a perspective view corresponding to FIG. 1, and illustration of the roof panel (except for a part) is omitted. FIG. 1 is a bottom view of a vehicle roof structure according to an embodiment of the present invention. 4 is a diagram illustrating a vibration system related to the roof structure of the vehicle shown in FIG. 3. FIG. 4 is a diagram illustrating the effects of the roof structure of the vehicle shown in FIG. 3. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A mode for carrying out the present invention will be described based on the accompanying drawings.

A vehicle roof structure (hereinafter referred to as "roof structure A") according to an embodiment of the present invention will be described based on FIGS. 1 to 5. The roof structure A includes a frame member 10, a roof panel 20, a shade rail 30, and a low-rigidity joint 40. Here, in FIG. 2, illustration of the roof panel 20 (excluding an inner panel 212 to be described later) is omitted for convenience of understanding.

Furthermore, for convenience of explanation, upr shown in these figures is the upward direction of the vehicle, dwn is the downward direction of the vehicle, fr is the forward direction of the vehicle, rr is the rearward direction of the vehicle, rh is the rightward direction of the vehicle, and lh is the leftward direction of the vehicle. In the following description, when "up and down" is used unless otherwise specified, it refers to up and down in the vertical direction of the vehicle. When "front and rear" is used unless otherwise specified, it refers to the front and rear of the vehicle in the longitudinal direction. The inside of the vehicle in the vehicle width direction refers to the direction toward the interior of the vehicle in the vehicle width direction (vehicle left-right direction). The vehicle exterior in the vehicle width direction refers to the vehicle exterior in the vehicle width direction.

The skeleton member 10 is a steel member that forms the frame of the vehicle body. The load acting on the vehicle body is mainly borne by the frame member 10. As shown in FIGS. 1 and 2, in the roof structure A, the frame member 10 includes a plurality of pillars 11, a pair of roof side rails 12, a pair of vertical reinforcing members 13, a horizontal reinforcing member 14, and a plurality of horizontal beams. Contains 15.

As shown in FIG. 1, each of the plurality of pillars 11 extends along the vehicle vertical direction. The plurality of pillars 11 include a pair of front pillars 111, a pair of rear pillars 112, and at least one pair of intermediate pillars 113. The pair of front pillars 111 are located at the front end of the roof structure A, and at both ends of the roof structure A in the vehicle width direction. The pair of rear pillars 112 are located at the rear end of the roof structure A, and at both ends of the roof structure A in the vehicle width direction. At least one pair of intermediate pillars 113 are located between the pair of front pillars 111 and the pair of rear pillars 112 in the vehicle longitudinal direction, and are located at both ends of the roof structure A in the vehicle width direction. In the roof structure A, at least one pair of intermediate pillars 113 is singular. Therefore, in the following description of the roof structure A, at least one pair of intermediate pillars 113 will be simply referred to as a pair of intermediate pillars 113.

As shown in FIG. 3, each of the pair of intermediate pillars 113 has a base portion 113A and a projecting portion 113B. The base portion 113A extends along the vehicle vertical direction. The projecting portion 113B projects from the upper end of the base portion 113A toward the inside of the vehicle in the vehicle width direction.

As shown in FIG. 1, the pair of roof side rails 12 are located at both ends of the roof structure A in the vehicle width direction. Each of the pair of roof side rails 12 extends along the vehicle longitudinal direction. A pair of roof side rails 12 are joined to the upper ends of the plurality of pillars 11.

As shown in FIG. 2, the pair of longitudinal reinforcing members 13 are located between the pair of front pillars 111 and the pair of intermediate pillars 113 in the vehicle longitudinal direction, and are located apart from each other in the vehicle width direction. Each of the pair of vertical reinforcing members 13 extends along the vehicle longitudinal direction. The pair of vertical reinforcing members 13 are located inward of the vehicle in the vehicle width direction with respect to the pair of roof side rails 12, and are joined to the pair of roof side rails 12.

As shown in FIG. 2, the lateral reinforcing member 14 is located above the pair of intermediate pillars 113 in the vehicle and extends along the vehicle width direction. Both ends of the horizontal reinforcing member 14 in the vehicle width direction are joined to a pair of roof side rails 12 and a pair of vertical reinforcing members 13.

As shown in FIG. 2, the plurality of lateral beams 15 are located behind the lateral reinforcing member 14 in the vehicle and spaced apart from each other in the longitudinal direction of the vehicle. Each of the plurality of lateral beams 15 extends along the vehicle width direction. Both ends of each of the plurality of horizontal beams 15 are joined to a pair of roof side rails 12.

As shown in FIG. 1, the roof panel 20 is joined to the upper end of the frame member 10 and closes the vehicle interior from above. In the roof structure A, the roof panel 20 includes a front panel 21 and a rear panel 22 both made of steel, and a glass panel 23 made of glass. Therefore, in the roof structure A, the glass panel 23 serves as a skylight that transmits sunlight in the roof panel 20.

As shown in FIG. 1, the front panel 21 is located at the front end of the roof structure A, and is located inward of the vehicle in the vehicle width direction with respect to the pair of roof side rails 12. The front panel 21 extends along the vehicle width direction. As shown in FIGS. 1 and 2, the front panel 21 includes an outer panel 211 and an inner panel 212 located below the outer panel 211 in the vehicle. Among these, the inner panel 212 is also called a front header panel. Both ends of each of the outer panel 211 and the inner panel 212 in the vehicle width direction are joined to a pair of roof side rails 12.

As shown in FIG. 1, the rear panel 22 is located further rearward of the vehicle than the front panel 21. The rear panel 22 is located apart from the front panel 21 in the vehicle longitudinal direction. The area of the rear panel 22 is larger than the area of the front panel 21 when viewed along the vehicle vertical direction. The rear panel 22 is joined to a pair of roof side rails 12, a horizontal reinforcing member 14, and a plurality of horizontal beams 15.

As shown in FIG. 1, the glass panel 23 is located between the front panel 21 and the rear panel 22 in the vehicle longitudinal direction. In the roof structure A, the glass panel 23 is of a fixed type that does not open or close. The glass panel 23 is joined to a pair of vertical reinforcing members 13 and a horizontal reinforcing member 14.

The roof panel 20 is joined to the frame member 10 mainly by welding. Regarding the joining of the roof panel 20 to the frame member 10, the plurality of transverse beams 15 and the rear panel 22 are joined by mastic adhesive. In addition, the pair of vertical reinforcing members 13 and the horizontal reinforcing members 14 are also joined to the glass panel 23 using the mastic adhesive.

As shown in FIG. 1, the roof panel 20 includes a first region 20A and a second region 20B. The first region 20A is located forward of the vehicle from a pair of intermediate pillars 113 among the plurality of pillars 11. In the roof structure A, the front panel 21 and the glass panel 23 correspond to the first region 20A. The second region 20B is located further toward the vehicle than the first region 20A. In the roof structure A, the rear panel 22 corresponds to the second region 20B.

The shade rail 30 is located below the vehicle than the roof panel 20 and is joined to the frame member 10. The shade rail 30 supports a roof shade (not shown) that blocks sunlight from the glass panel 23 from the vehicle interior side. In the shade rail 30, the roof shade is slidable along the vehicle longitudinal direction. As shown in FIG. 3, the shade rail 30 includes a pair of frame members 31, a stopper member 32, and a reinforcing member 33.

As shown in FIG. 3, the pair of frame members 31 are located apart from each other in the vehicle width direction. Each of the pair of frame members 31 extends along the vehicle longitudinal direction. Both ends of the aforementioned roof shade in the vehicle width direction are slidably supported by a pair of frame members 31. The pair of frame members 31 are joined to the pair of roof side rails 12 of the frame member 10, the overhang portions 113B of the pair of intermediate pillars 113, and any one of the plurality of horizontal beams 15.

As shown in FIG. 3, the stopper member 32 extends along the vehicle width direction. Both ends of the stopper member 32 in the vehicle width direction are connected to the front ends of the pair of frame members 31. When the aforementioned roof shade is slid toward the front of the vehicle, the roof shade comes into contact with the stopper member 32, so that the roof shade no longer slides toward the front of the vehicle.

As shown in FIG. 3 , the reinforcing member 33 is located further rearward of the vehicle than the stopper member 32 and between the pair of frame members 31 . Both ends of the reinforcing member 33 in the vehicle width direction are joined to the pair of frame members 31. The reinforcing member 33, the pair of frame members 31, and the stopper member 32 form the shade rail 30 into a frame-shaped body.

As shown in FIG. 3, each of the pair of frame members 31 of the shade rail 30 is joined to at least one of the first region 20A of the roof panel 20 and the second region 20B of the roof panel 20. In the roof structure A, each of the pair of frame members 31 is joined to the inner panel 212 of the front panel 21 corresponding to the first region 20A via a low-rigidity joint 40. Furthermore, in the roof structure A, the stopper member 32 of the shade rail 30 is also joined to the inner panel 212 via the low-rigidity joint 40. In this case, the mounting position of the low-rigidity joint 40 joined to each of the pair of frame members 31 in the vehicle vertical direction, and the mounting position of the low-rigidity joint 40 joined to the stopper member 32 in the vehicle vertical direction, It is preferable that they are also the same. The low-rigidity joint 40 is a member that is relatively easily deformed. An example of the low-rigidity joint 40 is a metal bracket with excellent deformability.

In the roof structure A, each of the pair of frame members 31 and the roof panel 20 may be directly joined to each other by welding or the like without using the low-rigidity joint 40. In this case, it is necessary to further reduce the rigidity of each of the pair of frame members 31. As a measure to further reduce the rigidity of each of the pair of frame members 31, for example, the section modulus of each of the pair of frame members 31 (the section modulus applied to the cross section in the direction in which each of the pair of frame members 31 extends) is made smaller. One example is setting. Furthermore, in the roof structure A, the rigidity of each of the pair of frame members 31 is further reduced, and each of the pair of frame members 31 and the roof panel 20 are joined via the low-rigidity joint 40. good.

Next, the vibration system related to the roof structure A will be explained. As shown in FIG. 4, the vibration system applied to the roof structure A includes two mass elements, a first mass m1 and a second mass m2, and three springs, a first spring k1, a second spring k2, and a third spring k3. It is expressed as a two-degree-of-freedom vibration system in which elements are connected in series.

The first mass m1 is an element related to the mass of the roof panel 20. The second mass m2 is an element that depends on the mass of the shade rail 30 including the pair of frame members 31. The relationship between the masses of the first mass m1 and the second mass m2 is m1>m2.

The first spring k1 is an element that quantifies the rigidity required for joining the roof panel 20 and the frame member 10. The first spring k1 is connected to the first mass m1 and the fixed element (skeletal member 10). Here, "rigidity required for joining" refers to deformation performance at the joint between members. The second spring k2 is an element that quantifies the rigidity required for joining each of the pair of frame members 31 and the skeleton member 10. The second spring k2 is connected to the second mass m2 and the fixed element. The third spring k3 is an element that quantifies the rigidity required for joining each of the pair of frame members 31 and the roof panel 20. The third spring k3 also includes an element that quantifies the rigidity of each of the pair of frame members 31. The third spring k3 is connected to the first mass m1 and the second mass m2. The relationship between the rigidities of each of the first spring k1, second spring k2, and third spring k3 is k1≧k2>k3. Therefore, in the roof structure A, at least one of the rigidity required for joining each of the pair of frame members 31 and the roof panel 20 and the rigidity of each of the pair of frame members 31 is different from that of each of the pair of frame members 31. The rigidity is lower than the rigidity required for joining the frame member 10 to the frame member 10.

Next, the effects of the roof structure A will be explained.

In the roof structure A, the roof panel 20 and each of the pair of frame members 31 (shade rails 30) are joined to the frame member 10. Each of the pair of frame members 31 extends along the vehicle longitudinal direction and is joined to at least one of the first region 20A of the roof panel 20 and the second region 20B of the roof panel 20. At least one of the rigidity required for joining each of the pair of frame members 31 and the roof panel 20 and the rigidity of each of the pair of frame members 31 is the rigidity required for joining each of the pair of frame members 31 and the skeleton member 10. The stiffness is lower than that of Thereby, in the vibration system of the roof structure A shown in FIG. 4, the rigidity of the third spring k3 can be made smaller than the rigidity of the second spring k2. As a result, the vibration period of the shade rail 30 (second mass m2) including the pair of frame members 31 becomes similar to the vibration frequency of the roof panel 20 (first mass m1). That is, as shown in FIG. 5, the natural frequency NF2 of the shade rail 30 is similar to the natural frequency NF1 of the roof panel 20, so the resonance frequency between the frame member 10 and the shade rail 30 is different from that of the frame member 30. 10 and the roof panel 20 substantially match the resonance frequency. Therefore, the vibration waves caused by the resonance between the frame member 10 and the roof panel 20 and the shade rail 30 are different from the vibration waves caused by the resonance between the frame member 10 and the roof panel 20. It is approximately equal to the combination of vibration waves related to resonance.

In this case, if the vibration waves caused by the resonance between the frame member 10 and the shade rail 30 are in opposite phase to the vibration waves caused by the resonance between the frame member 10 and the roof panel 20, the vibration waves caused by the resonance between the frame member 10 and the roof panel The amplitude of the vibration wave that resonates with 20 and the shade rail 30 becomes smaller. As a result, as shown in FIG. 5, the inertance level IL3 in the resonant state between the frame member 10, the roof panel 20, and the shade rail 30 is lower than the inertance level IL1 in the resonant state between the frame member 10 and the roof panel 20. will also be small. Note that the inertance level IL2 shown in FIG. 5 is related to the resonance state between the frame member 10 and the shade rail 30. Therefore, according to the roof structure A, it is possible to reduce the vibration level of the vehicle in the resonance state without causing an excessive increase in the number of parts.

Generally, the natural frequency NF1 of the roof panel 20 is close to the frequency (30 to 45 Hz) generated from the drive system when the vehicle's transmission shifts to a lock-up state. Therefore, the level of vehicle vibration caused by the resonance between the frame member 10 and the roof panel 20 is relatively more pronounced than the level of vehicle vibration caused by the resonance between the frame member 10 and other vehicle components. . Therefore, according to the roof structure A, it is possible to efficiently reduce a relatively significant vibration level among the vibration levels of the vehicle.

In roof structure A, in addition to the pair of frame members 31, the stopper member 32 of the shade rail 30 is also joined to the inner panel 212 of the front panel 21 (first region 20A of the roof panel 20) via the low-rigidity joint 40. has been done. In this case, the mounting position of the low-rigidity joint 40 joined to each of the pair of frame members 31 in the vehicle vertical direction, and the mounting position of the low-rigidity joint 40 joined to the stopper member 32 in the vehicle vertical direction, It is preferable that they are also the same. Thereby, the deformation performance around the vehicle width direction at the joint between the shade rail 30 and the inner panel 212 can be further increased. Therefore, the rigidity of the third spring k3 shown in FIG. 4 can be made even smaller than the rigidity of the second spring k2.

The present invention is not limited to the embodiments described above. The specific configuration of each part of the present invention can be changed in design in various ways.

A: Roof structure 10: Skeletal member 11: Pillar 111: Front pillar 112: Rear pillar 113: Intermediate pillar 113A: Base 113B: Overhang 12: Roof side rail 13: Vertical reinforcement member 14: Lateral reinforcement member 15: Horizontal beam 20 : Roof panel 20A: First area 20B: Second area 21: Front panel 211: Outer panel 212: Inner panel 22: Rear panel 23: Glass panel 30: Shade rail 31: Frame member 32: Stopper member 33: Reinforcement member 40: Low rigidity joint m1: 1st mass m2: 2nd mass k1: 1st spring k2: 2nd spring k3: 3rd spring IL1, IL2, IL3: Inertance level NF1, NF2: Natural frequency

Claims (1)

Skeletal members forming the framework of the vehicle body,
a roof panel that is joined to the upper end of the frame member and closes the passenger compartment from above the vehicle;
a pair of first members located below the roof panel in the vehicle, spaced apart from each other in the vehicle width direction, and joined to the frame member ;
a second member located below the vehicle than the roof panel, extending along the vehicle width direction, and connected to the front end of each of the pair of first members;
The skeleton member includes at least one pair of intermediate pillars located between a pair of front pillars and a pair of rear pillars in the longitudinal direction of the vehicle,
The roof panel includes a first region located further forward of the vehicle than either of the at least one pair of intermediate pillars, and a second region located further rearward of the vehicle from the first region,
further comprising a pair of first joints and a second joint,
The pair of first members extend along the longitudinal direction of the vehicle and are individually joined to the first region via the pair of first joints ,
The second member is joined to the first region via the second joint,
The rigidity of each of the pair of first joints and the second joint is lower than the rigidity required for joining each of the pair of first members and the skeleton member ,
The roof structure of the vehicle , wherein the pair of first joints and the second joints are installed at the same position in the vertical direction of the vehicle .

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