Vehicle rear part structure

Abstract

To improve the torsional rigidity of a vehicle rear part compared to that of a conventional vehicle.SOLUTION: An annular frame part 40 surrounds a back door opening 11. A connection portion 14A of a vehicle body is connected to a rear suspension. A tire house reinforcement 22 and an S-S reinforcement 50, which are reinforcement parts, extend from the connection portion 14A to the annular frame part 40 along a side wall of the vehicle body. A side frame 70 is branched from the S-S reinforcement 50 to extend to the annular frame part 40. A cross frame 60 extends from a connection point between the S-S reinforcement 50 and the side frame 70 in the vehicle width direction. A glass window 80 is fixed to the side frame 70 and the cross frame 60. In addition, the glass window 80 is formed of a safety glass.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] Disclosed herein is a vehicle rear structure. [Background technology]

[0002] 4, a rear suspension 105 is suspended under a vehicle body 100. For example, the rear suspension 105 includes a coil spring 106. A connection part 101 is provided on the bottom surface of the vehicle body. The upper end of the coil spring 106 is seated on the connection part 101.

[0003] When one of the pair of rear wheels 102, 102 rides over a step 104 on the road surface, an upward load is input from the coil spring 106 to the vehicle body 100. Due to the input of the load, the vehicle body 100 is torsionally deformed from the cross-sectional shape shown by the dashed line to the cross-sectional shape shown by the solid line.

[0004] The larger the cross-sectional area of ​​the opening at the rear of the vehicle body is, the greater the amount of torsional deformation will be. As the amount of torsional deformation increases, the amount of deformation relative to the front of the vehicle also increases, which may result in a decrease in ride comfort.

[0005] For example, in Patent Document 1, a diagonal member is disposed inside a skeleton component having a rectangular closed cross section. The ends of the diagonal member are disposed at the vertices of the rectangular cross section of the skeleton component. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2015-085911 A Summary of the Invention [Problem to be solved by the invention]

[0007] This specification discloses a vehicle rear structure that can improve the torsional rigidity of the vehicle rear compared to conventional structures. [Means for solving the problem]

[0008] This specification discloses a vehicle rear structure. The structure includes an annular skeletal part, a connection part of a vehicle body, a reinforcing part, a side frame, a cross frame, and a glass window. The annular skeletal part surrounds a back door opening. The connection part of the vehicle body is connected to a rear suspension. The reinforcing part extends from the connection part along a side wall of the vehicle body to the annular skeletal part. The side frame branches off from the reinforcing part and is connected to the annular skeletal part. The cross frame extends in the vehicle width direction from a connection point between the reinforcing part and the side frame. The glass window is fixed to the side frame and the cross frame. The glass window is further composed of safety glass.

[0009] When the rear wheels ride over a step, for example, a load is input to the vehicle body from the rear suspension. The input load is transmitted from the reinforcing part to the annular frame part. The load is further transmitted from the side frame branching off from the reinforcing part to the annular frame part. The load is dispersed by having multiple load transmission paths. Furthermore, a glass window is fixed to the side frame. In other words, the glass window is used as the load transmission path. Here, a high-strength safety glass is used as the glass window, compared to, for example, a single-pane float glass. This allows the glass window to be used as a load transmission path while suppressing breakage.

[0010] In the above configuration, the vehicle rear structure may include a floor cross member and a pair of braces. The floor cross member is disposed on the vehicle compartment floor. The floor cross member extends in the vehicle width direction. The pair of braces extend from both ends of the cross frame in the vehicle width direction toward a center of the floor cross member in the vehicle width direction.

[0011] According to the above-described configuration, the area below the cross frame is reinforced by the brace, thereby improving the torsional rigidity of the rear portion of the vehicle body.

[0012] In the above-mentioned configuration, the safety glass may be a laminated glass having the same strength as the windshield glass.

[0013] Windshield glass is required to be strong enough not to break due to wind pressure or flying stones, etc. On the other hand, side and rear glass are set to have a strength that allows them to be broken by occupants in order to secure an escape route in the event of a drowning accident, etc. Among the glass provided in a vehicle, by using a glass window of the same strength as the high-strength windshield glass, breakage of the glass window when a load is transmitted is suppressed.

[0014] In the above-mentioned configuration, the vehicle interior and the luggage compartment may be separated by a glass window. In this case, the side frame is formed so that the vehicle width dimension is longer than the vehicle width dimension of the reinforcing part. Furthermore, the side frame is drilled with a service hole.

[0015] According to the above-mentioned configuration, the air conditioning ducts and the like are arranged across the passenger compartment and the luggage compartment through the service hole in the side frame. Also, by making the side frame into a so-called wide shape, it is possible to secure the installation location of the service hole while maintaining the strength.

[0016] In the above-mentioned configuration, the reinforcing component may extend from the rear tire housing toward the rear and upward of the vehicle. Furthermore, the side frame and the glass window are disposed vertically.

[0017] According to the above-mentioned configuration, by disposing the glass window vertically, light transmission from the passenger compartment to the luggage compartment is ensured. Effect of the Invention

[0018] The vehicle rear structure according to the present specification can improve the torsional rigidity of the vehicle rear compared to the prior art. [Brief description of the drawings]

[0019] [Figure 1] 1 is a perspective view illustrating a vehicle rear structure according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view illustrating a connection structure between a rear suspension and a vehicle body. [Diagram 3] FIG. 2 is a diagram illustrating an example of a transmission path of a load input from a rear suspension. [Figure 4] 1A and 1B are diagrams illustrating torsional deformation of a vehicle body in response to a load input from a rear suspension. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] A vehicle rear structure according to an embodiment will be described below with reference to the drawings. The shapes, materials, numbers, and values ​​described below are examples for the purpose of explanation. These elements can be changed as appropriate depending on the specifications of the vehicle rear structure. In addition, the same reference numerals are used for equivalent elements in all drawings below.

[0021] In addition, in Figure 1-3, a Cartesian coordinate system is used to represent the position and direction of each component. This Cartesian coordinate system consists of the FR axis, the RW axis, and the UP axis. The FR axis is the axis in the vehicle's longitudinal direction. The RW axis is the axis in the vehicle's transverse direction. The UP axis is the axis in the vehicle's vertical direction. The positive direction of the FR axis is the front of the vehicle. The positive direction of the RW axis is the right side of the vehicle. The positive direction of the UP axis is upward.

[0022] Fig. 1 illustrates a vehicle rear structure according to this embodiment. Fig. 1 illustrates the internal structure of a vehicle compartment 10 and a luggage compartment 15. Fig. 1 omits illustration of interior components such as a rear seat, floor carpet, trim, garnish, etc. Fig. 1 also omits illustration of some of the structure on the left side in the vehicle width direction based on the left-right symmetrical structure of the vehicle.

[0023] The vehicle rear structure according to the present embodiment is applied to a vehicle having a structure in which the opening cross-sectional areas of the passenger compartment 10 and the luggage compartment 15 are substantially equal to each other. For example, the vehicle rear structure according to the present embodiment is applied to so-called hatchback and SUV type vehicles.

[0024] A floor panel 12 is provided as a floor panel for the passenger compartment 10 and the luggage compartment 15. A floor cross member 30 is disposed on the floor panel 12. The floor cross member 30 is a skeletal component and extends in the vehicle width direction. For example, the floor cross member 30 has a hat-shaped cross section. The floor cross member 30 forms a closed cross-sectional structure together with the floor panel 12. The floor cross member 30 is also disposed between a pair of rear tire houses 20, 20.

[0025] A side panel 17 is provided as a side wall in the vehicle interior 10. A C-pillar 18 is also provided on the side wall of the vehicle interior 10. The C-pillar 18 is a framework component, and extends along the rear tire house 20 in the vertical direction.

[0026] A CC reinforcement 34 is provided on the inner surface of the rear tire house 20 in the vehicle width direction. The CC reinforcement 34 is a reinforcing component that connects the C-pillar 18 and the floor cross member 30. The CC reinforcement 34 extends in the up-down direction along the inner surface of the rear tire house 20. The CC reinforcement 34 is also disposed in a front portion of the rear tire house 20.

[0027] A back door opening 11 is provided at the rear end of the vehicle. A luggage compartment 15 can be accessed from the back door opening 11. An annular skeletal component 40 is disposed so as to surround the back door opening 11. The annular skeletal component 40 has, for example, a closed cross-sectional structure with a rectangular cross section. In FIG. 1, for the purpose of simplifying the illustration, the annular skeletal component 40 is illustrated as a single component. However, the annular skeletal component 40 is composed of a plurality of components.

[0028] The annular frame part 40 extends along the wall surface of the luggage compartment 15. For example, the luggage compartment 15 is a space behind a rear seat (not shown). The annular frame part 40 extends along the floor surface, side surface, and ceiling surface of the luggage compartment 15, for example.

[0029] For example, a lower portion of the annular frame part 40 is provided vertically. On the other hand, an upper portion of the annular frame part 40 is inclined toward the front of the vehicle. As described later, a glass window 80 is disposed in the annular frame part 40. The glass window 80 separates the vehicle interior 10 from the luggage compartment 15.

[0030] FIG. 2 illustrates the vehicle structure around the left rear wheel (not shown). That is, FIG. 2 illustrates the vehicle structure from an angle looking at the left side of the rear of the vehicle from below. Rockers 14 are disposed below the rear tire house 20. The rockers 14 are disposed under the floor of the vehicle body, at both ends in the vehicle width direction. The rockers 14 extend in the front-to-rear direction of the vehicle. The rockers 14 are also framework components having a closed cross-sectional structure with a rectangular cross-section. Note that in FIG. 2, for the purpose of simplifying the illustration, the rocker 14 is illustrated as if it were a single component. However, the rocker 14 is made up of multiple components.

[0031] A connection part 14A is disposed on the bottom surface of the rocker 14. A rear suspension is connected to the connection part 14A. In other words, the connection part 14A is a part on the vehicle body side that is connected to the rear suspension. For example, in the example of FIG. 2, the rear suspension is a double wishbone type suspension. The rear suspension includes a coil spring 95. Other structures of the rear suspension (such as an upper arm and a shock absorber) are omitted from the illustration.

[0032] A guide 14B is disposed on the connection portion 14A. The guide 14B is substantially conical in shape and extends downward. A coil spring 95 is inserted along the guide 14B. The upper end of the coil spring 95 is seated on the connection portion 14A.

[0033] The coil spring 95 supports the vehicle body. For example, when the rear wheel goes over a step, an upward load is transmitted from the coil spring 95 to the vehicle body.

[0034] Reinforcement parts are arranged from the connection part 14A along the side wall of the vehicle body. The reinforcement parts extend to the annular frame part 40 (see FIG. 1). For example, the reinforcement parts include the tire house reinforcement 22 (see FIG. 2) and the SS reinforcement 50 (see FIG. 1).

[0035] 2, a tire house reinforcement 22 is disposed along a wall surface of the rear tire house 20. For example, the tire house reinforcement 22 extends from a lower end to a top surface of the rear tire house 20. For example, the tire house reinforcement 22 has an inverted J shape when viewed in the vehicle front-rear direction.

[0036] An upper end of the tire house reinforcement 22 is connected to a lower end of the SS reinforcement 50 via the rear tire house 20. With reference to FIGS. 1 and 3, the SS reinforcement 50 extends from the tire house reinforcement 22 to the annular frame component 40.

[0037] The SS reinforcement 50 has a closed cross-sectional structure with a rectangular cross section. For the purpose of simplifying the illustration, the SS reinforcement 50 is illustrated as being one part in Figures 1 and 3. However, the SS reinforcement 50 is made up of a plurality of parts.

[0038] The SS reinforcement 50 extends upward and rearward from the rear portion of the rear tire house 20. The upper end of the SS reinforcement 50 is connected to the upper portion (inclined portion) of the annular frame part 40. In addition, the C-pillar 18 and the SS reinforcement 50 are connected to the rear side reinforcement 36.

[0039] Note that, instead of the double wishbone type, a MacPherson strut type suspension may be used as the rear suspension. In this case, a suspension tower is formed in the rear tire house 20. A coil spring is seated on this suspension tower. In this case, the lower end of the SS reinforcement 50 is connected to the suspension tower.

[0040] With reference to FIG. 1, SS reinforcements 50 extend rearward and upward from each of a pair of rear tire housings 20, 20 of the vehicle. The pair of SS reinforcements 50, 50 are connected to a cross frame 60. The cross frame 60 is a frame component that extends in the vehicle width direction. For example, the cross frame 60 has a closed cross-sectional structure with a rectangular cross section. Furthermore, the cross frame 60 includes a flange 60A for fixing a glass window 80.

[0041] Further, side frames 70 are provided branching off from each of the SS reinforcements 50. The lower ends of the side frames 70 are connected to the SS reinforcements 50. The upper ends of the side frames 70 are connected to the rear header 90. The side frames 70 are disposed vertically.

[0042] As described later, when a load is input from the rear suspension, the side frame 70 becomes part of the transmission path of the load. The side frame 70 also functions as a side frame of the glass window 80.

[0043] For example, the side frame 70 is a single steel plate part. The side frame 70 has a service hole 72 drilled in the front-rear direction. As described later, the vehicle interior 10 and the luggage compartment 15 are separated by a glass window 80. An interior part that straddles the vehicle interior 10 and the luggage compartment 15, such as an air conditioning duct, is inserted into the service hole 72.

[0044] For example, the vehicle width dimension W2 of the side frame 70 is longer than the vehicle width dimension W1 of the SS reinforcement 50. By making the side frame 70 wide, the strength as a load transfer path is ensured even if the service hole 72 is drilled.

[0045] Furthermore, by making the side frames 70 wide, the vehicle width dimension of the glass window 80 can be shortened. For example, when a vehicle is assembled, the glass window 80 is carried into the vehicle body. By shortening the vehicle width dimension of the glass window 80, it is possible to prevent the glass window 80 from getting caught on the vehicle body during the carrying-in process.

[0046] The lower end of the side frame 70 at least partially overlaps with the vehicle width direction end of the cross frame 60. In other words, the cross frame 60 extends in the vehicle width direction from the connection point between the SS reinforcement 50 and the side frame 70. As illustrated in Fig. 3, when a load is transmitted from the lower portion of the SS reinforcement 50, the load is distributed to the upper portion of the SS reinforcement 50, the cross frame 60, and the side frame 70.

[0047] An upper end of the side frame 70 is connected to a lower end of the rear header 90. The rear header 90 functions as an upper frame for the glass window 80. For example, the rear header 90 has an arch shape in a front view and extends from one side frame 70 to the other side frame 70. An upper end of the rear header 90 is connected to an upper arm 40A of the annular framework component 40. Here, the upper arm 40A and the rear header 90 may be an integrated component.

[0048] The glass window 80 is a partition that separates the vehicle interior 10 from the luggage compartment 15. The glass window 80 suppresses the transmission of noise from the luggage compartment 15 to the vehicle interior 10.

[0049] An upper portion of the glass window 80 is fixed to the rear header 90. In addition, a side portion of the glass window 80 is fixed to the side frame 70. Furthermore, a lower portion of the glass window 80 is fixed to the cross frame 60. For example, the glass window 80 is disposed behind a rear seat (not shown) and above the shoulder portions of the rear seat.

[0050] A highly elastic adhesive, for example, is used to fix the glass window 80 to the frame. That is, the load transmitted to the side frame 70 and the like is transmitted to the glass window 80 via the highly elastic adhesive.

[0051] In order to prevent the glass window 80 from breaking due to the transmitted load, the glass window 80 is made of safety glass. According to the definition of the Japanese Industrial Standards (JIS), safety glass refers to a processed glass product intended to reduce personal injury in the event of breakage. Safety glass includes laminated glass, tempered glass, organic glass, and glass-plastic. In this way, safety glass, which has higher strength than single-pane float glass, is used as the glass window 80.

[0052] For example, the glass window 80 is made of laminated glass. Laminated glass has a film sandwiched between two glass plates. When the laminated glass breaks, the film holds the glass fragments and prevents them from scattering. Therefore, the glass fragments are prevented from scattering toward the rear seat (not shown) located in front of the glass window 80.

[0053] For example, the glass window 80 is a laminated glass having the same strength as the windshield glass. For example, the contents of the impact resistance test for the windshield glass (front window) are shown in JIS R3212:2015 "Test method for automotive safety glass" defined by the Japanese Industrial Standards. The glass window 80 has the strength to pass this impact resistance test.

[0054] Windshield glass is required to be strong enough not to break due to wind pressure or flying stones, etc. On the other hand, side glass and rear glass are set to have a strength that allows them to be broken by occupants in order to secure an escape route in the event of a drowning accident, etc. Among the glasses provided in the vehicle, by using a glass window 80 having the same strength as the high-strength windshield glass, breakage of the glass window 80 when a load is transmitted is suppressed.

[0055] The glass window 80 is disposed vertically together with the side frame 70. In general, the light transmittance of glass varies depending on the angle of incidence of light rays. The light transmittance of glass is maximum when light rays are incident parallel to the normal to the glass surface. By disposing the glass window 80 vertically, the light transmittance of the glass window 80 is ensured. Therefore, for example, visibility from the passenger compartment 10 to the luggage compartment 15 and the rear of the vehicle through the glass window 80 is ensured.

[0056] A pair of braces 65, 65 are arranged below the cross frame 60. The pair of braces 65, 65 extend from both ends of the cross frame 60 in the vehicle width direction toward the center of the floor cross member 30 in the vehicle width direction. For example, a base 32 is formed in the center of the floor cross member 30 in the vehicle width direction. One end of the pair of braces 65, 65 is fixed to the base 32. The pair of braces 65, 65 are further connected by a connection bar 67. The pair of braces 65, 65 suppress torsional deformation in the portion below the cross frame 60.

[0057] <Load transfer path> When the rear wheels run over a step, a load is input from the coil spring 95 (see FIG. 2) of the rear suspension to the connection portion 14A. This load is transmitted to the SS reinforcement 50 (see FIG. 3) via the tire house reinforcement 22.

[0058] The load transmitted to the SS reinforcement 50 is distributed to the upper portion of the SS reinforcement 50, the cross frame 60, and the side frame 70. Furthermore, the load transmitted to the side frame 70 and the cross frame 60 is also transmitted to the glass window 80 via the highly elastic adhesive. In other words, the load is distributed over a surface area. This load distribution suppresses torsional deformation of the passenger compartment 10 and the luggage compartment 15. [Explanation of symbols]

[0059] 10 passenger compartment, 11 back door opening, 14A connection part, 15 luggage compartment, 17 side panel, 20 rear tire house, 22 tire house reinforcement (reinforcement part), 30 floor cross member, 40 ring-shaped frame part, 50 SS reinforcement (reinforcement part), 60 cross frame, 65 brace, 70 side frame, 72 service hole, 80 glass window, 90 rear header, 95 coil spring.

Claims

1. an annular frame part surrounding a back door opening; A connection part of the vehicle body that is connected to the rear suspension; a reinforcing component extending from the connection portion along a side wall of the vehicle body to the annular frame component; a side frame branched from the reinforcing component and connected to the annular framework component; A cross frame extending in a vehicle width direction from a connection point between the reinforcing component and the side frame; a glass window fixed to the side frame and the cross frame; Equipped with The glass window is made of safety glass. Vehicle rear structure.

2. 2. The vehicle rear structure according to claim 1, A floor cross member disposed on a vehicle compartment floor and extending in a vehicle width direction; A pair of braces extending from both ends of the cross frame in the vehicle width direction toward the center of the floor cross member in the vehicle width direction; A vehicle rear structure comprising:

3. 2. The vehicle rear structure according to claim 1, A vehicle rear structure, wherein the safety glass is a laminated glass having the same strength as a windshield glass.

4. 4. The vehicle rear structure according to claim 3, The glass window separates the vehicle interior from the luggage compartment, The vehicle width dimension of the side frame is longer than the vehicle width dimension of the reinforcing part, The side frame is provided with a service hole. Vehicle rear structure.

5. 5. The vehicle rear structure according to claim 4, The reinforcing component extends from the rear tire house toward the rear and upward of the vehicle, The side frame and the glass window are arranged vertically. Vehicle rear structure.

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