JP2009035231A - Cabin mount structure for vehicle body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cabin mount structure for a vehicle capable of obtaining sufficient durability force in a usual traveling state and enabling separation of a fastening part of a target position when load input is present. <P>SOLUTION: A frame 100 and the cabin CB are fixed/supported on a front side, an approximately central part and a rear part of a bottom part FL of the cabin CB by a first support 210, a third support 230 and a second support 22 respectively. Rupture strength of the third support 230 relative to tensile load in a vehicle body vertical direction is set lower than the first support 210 or the second support 220. Further, a structure variation part 100Z is formed near a fixed position of the third support 230 on the frame 100. When the load input is applied from a front side of the vehicle body, the frame 100 is downwardly bent at the structure variation part 100Z, the third support 230 is ruptured, and the frame 100 and the approximately central part of the bottom part FL of the cabin CB are separated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cabin mounting structure for a vehicle body of a vehicle having a frame structure.

  In general, a vehicle having a frame structure is designed to absorb load energy when a load is input from the front surface of the vehicle, by destroying a frame in an engine room portion that houses the engine.

  In such a vehicle, when a larger load input is applied, the vehicle body deceleration when the load input is applied is excessive by destroying the frame disposed in the lower part of the passenger compartment located behind the engine room. A structure that absorbs load energy is conceivable.

  By the way, in a vehicle having a frame structure, a floor panel of a passenger cabin is generally fixed to the frame by a support body called a cab mount. Therefore, when the frame disposed in the lower part of the passenger compartment is destroyed, the floor panel of the passenger compartment may be deformed by the support fixed to the frame, and the passenger protection performance may be lowered.

In order to avoid such a problem, a support structure that can separate the cabin and the frame when a load is input has been proposed (see Patent Document 1). In this support structure, a notch is provided in the insulator installed on the lower side of the support, and a separation groove is provided in the insert disposed around the fastening bolt that penetrates the support so that the notch and the insert of the insulator are inserted. The weak section is set by matching the position of the body separation groove, and a breakage groove is provided in the washer of the fastening bolt. When a load is input, the support is broken by the weak section and the breakage groove, and the cabin and frame Are supposed to separate. Here, the weak cross section and the breaking groove are designed to break under a load at which the floor panel of the passenger cabin starts to deform.
JP 2005-533719

  However, when the support described in Patent Document 1 is used to fix the cabin and the frame, it is difficult to predict how the frame disposed in the lower portion of the cabin will be deformed when a load is input. Therefore, it is necessary to use all of the supports that fix the cabin to the frame. Here, since each support is designed to break below the load at which the floor panel of the cabin starts to deform, there is a possibility that the required durability cannot be obtained under normal use conditions There is a point.

  In the present invention, in view of the above problems, a vehicle body mounting structure that can obtain sufficient durability in a normal traveling state and that can separate a fixed target portion when a load input is applied from the front of the vehicle body. Is intended to provide.

  In order to solve the above-mentioned problems, in the cabin mounting structure for a vehicle body of the present invention, a vehicle cabin and a portion that extends in the left-right front-rear direction of the vehicle body and that is positioned below the cabin of the vehicle are located below the front and rear thereof. A frame that is positioned, fixed to the upper surface of the frame and fixed to the front of the bottom of the cabin and supporting the cabin; and fixed to the upper surface of the frame and fixed to the rear of the bottom of the cabin There are provided two supports that support the cabin, and a third support that is fixed to the upper surface of the frame and that is fixed to a substantially central portion of the bottom of the cabin and supports the cabin. The breaking strength of the third support body with respect to the tensile load in the vertical direction of the vehicle body is set lower than the breaking strength of the first support body or the second support body with respect to the tensile load in the vertical direction of the vehicle body. A structural change portion is formed in the vicinity of the fixed position of the third support. When a load input is applied from the front of the vehicle body, the frame is bent downward at the structural change portion, and the third support is broken to separate the frame from the substantially central portion of the bottom of the cabin.

  According to the present invention, the frame and the cabin are fastened by the first support and the second support, which are normal supports, before and after the structural change portion provided in the frame. Sufficient durability can be obtained in the running state. Also, when a load input is applied from the front of the vehicle body, the structural change portion provided on the frame bends downward, and the separable third support provided near the structure change portion breaks and separates. Thus, the frame and the substantially central portion of the bottom of the passenger compartment are separated from each other, so that the bottom of the passenger compartment is not deformed by the load input.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram of an embodiment of the present invention.

  In the following description, the structure on the left side of the vehicle will be described, but the right side has the same structure.

  The cabin mounting structure of the vehicle body in the present embodiment includes a frame 100, a first support 210 (210F, 210CBF), a second support 220 (220R, 220CBR), and a third support 230 having a separable structure. , Engine room ER, guest room CB, and trunk room TR.

  The frame 100 extends in the left-right and front-rear directions of the vehicle, and is attached with a power train and a suspension (both not shown). The frame 100 includes a front part 110 located in front of the vehicle, a passenger compartment lower part 130 disposed in the center of the vehicle, a rear part 140 located rearward of the vehicle, and located between the front part 110 and the passenger compartment lower part 130. The front kick-up portion 120F is inclined upward from 130 and connected to the front portion 110, and the rear kick-up portion 120R is inclined upward from the passenger compartment lower portion 130 and connected to the rear portion 140.

  In the engine room ER, a lower member (details are omitted) constituting the engine room ER are fastened with a fastening bolt 201B and a nut 201N (see FIG. 2) to a first support 210F fixed to the upper surface of the front portion 110 of the frame 100. It is concluded.

  In the trunk room TR, a lower member (details are omitted) constituting the trunk room TR are fastened to a second support body 220R fixed to the upper surface of the rear portion 140 of the frame 100 by fastening bolts 201B and nuts 201N (see FIG. 2). ing.

  On the left and right sides of the bottom FL of the guest room CB, sill SL provided substantially along the guest room lower part 130 of the frame 100 is provided. A first support 210CBF and a second support 220CBR are fixed to the upper surface of the passenger compartment lower portion 130 of the frame 100 on the vehicle front side and the vehicle rear side, respectively. A third support member 230 having a separable structure is fixed to a substantially central portion of the upper surface of the passenger compartment lower portion 130 of the frame 100. The vehicle front side SLF of the sill SL is fastened to the first support 210CBF with fastening bolts 201B and nuts 201N, and the vehicle rear side SLR of the sill SL is fastened to the second support 220CBR with fastening bolts 201B and nuts 201N. The substantially central portion SLC of the sill SL is fastened to the third support 230 with fastening bolts 201B and nuts 201N (see FIGS. 2 and 4).

  Here, the first support 210F fastened to the engine room ER is fixed to the upper surface of the front portion 110 of the frame 100 by the bracket 203 with a fixing bolt 202B and a nut 202N (see FIG. 3). An impact absorbing insulator IS is attached between the bracket 203 and the engine room ER (see FIG. 2).

  Similarly, the second support body 220R fastened to the trunk room TR is fixed to the upper surface of the rear portion 140 of the frame 100 by the bracket 203 with fixing bolts 202B and nuts 202N (see FIG. 3). Further, an insulator IS for absorbing shock is attached between the bracket 203 and the trunk room TR (see FIG. 2).

  Similarly, the first support body 210CBF fastened to the vehicle front side SLF of the sill SL is fixed to the upper surface of the vehicle front side of the cabin lower part 130 of the frame 100 with a fixing bolt 202B and a nut 202N by the bracket 203 ( (See FIG. 3). Further, an insulator IS for absorbing shock is attached between the bracket 203 and the sill SL (see FIG. 2).

  Similarly, the second support body 220CBR fastened to the vehicle rear side SLR of the sill SL is fixed to the vehicle rear side upper surface of the passenger compartment lower portion 130 of the frame 100 by the bracket 203 with a fixing bolt 202B and a nut 202N ( (See FIG. 3). Further, an insulator IS for absorbing shock is attached between the bracket 203 and the sill SL (see FIG. 2).

  Similarly, the third support body 230 fastened to the substantially central portion SLC of the sill SL is fixed to the upper surface of the substantially central portion of the cabin lower portion 130 of the frame 100 by the bracket 203 with a fixing bolt 202B and a nut 202N ( (See FIG. 3). Further, an insulator IS for shock absorption is attached between the bracket 203 and the sill SL (see FIG. 4).

  Here, the breaking strength of the third support 230 with respect to the tensile load in the vertical direction of the vehicle body is lower than at least one of the breaking strengths of the first support 210CBF and the second support 220CBR with respect to the tensile load in the vertical direction of the vehicle body. Is set. That is, a predetermined portion of the third support 230 is broken at a tensile load weaker than at least one of the first support 210CBF and the second support 220CBR and separated (described later).

  Further, in the lower part 130 of the passenger compartment 130 of the frame 100, the vicinity of the portion where the third support 230 is fixed is provided with a structural change portion 100Z that is a weak portion having a weakness relative to the strength of the surrounding area (FIG. 1). reference).

  FIG. 2 shows a cross-sectional side view of the first supports 210F and 210CBF and the second supports 220R and 220CBR. Hereinafter, the first support 210F will be described as an example.

  The first support 210F includes a bracket 203, an upper washer 205U, a lower washer 205L, a spacer 204, an insulator IS, a fastening bolt 201B, and a nut 201N.

  The bracket 203 has a shape recessed downward, and has a through hole at the center of the recessed portion. Moreover, it has the attachment part 203P for attaching the bracket 203 to the flame | frame 100 in an outer edge. The attachment portion 203P has a through hole in a substantially central portion.

  The insulator IS is made of a material such as rubber that absorbs vibration energy, and has a through hole in the center.

  The upper washer 205U is a dish-like member and has a through hole in the center.

  The lower washer 205L is a dish-like member and has a through hole in the center.

  The spacer 204 is a cylindrical member having a hollow inside.

  An insulator IS is disposed in the recessed portion of the bracket 203. A spacer 204 is inserted into the through hole of the insulator IS. An upper washer 205U is disposed on the upper portion of the spacer 204 (upper portion of the insulator IS), and a lower washer 205L is disposed on the lower portion of the spacer 204, and the respective through holes are located concentrically. The fastening bolt 201B penetrates the through hole of the lower washer 205L, the spacer 204, and the through hole of the upper washer 205U from below the lower washer 205L, and is fastened to the nut 201N above the upper washer 205U.

  As shown in FIG. 3, the first support 210 </ b> F is arranged from the top of the frame 100 in the arrangement hole 110 </ b> D provided on the upper surface of the front part 110 of the frame 100. The front portion 110 of the frame 100 is provided with an attachment hole 110H for fixing the attachment portion 203P of the bracket 203 with the fixing bolt 202B. The fixing bolt 202B passes through the through hole of the mounting portion 203P of the bracket 203 and the mounting hole 110H of the front portion 110 of the frame 100, and is fastened to the nut 202N on the back side of the upper surface of the front portion 110 of the frame 100 to be the first support. The body 210F is fixed to the upper surface of the front portion 110 of the frame 100.

  Similarly, the first support 210CBF, the second supports 220R, and 220CBR also have the vehicle body front side upper surface of the cabin lower portion 130 of the frame 100, the rear portion 140 upper surface of the frame 100, and the vehicle body of the cabin lower portion 130 of the frame 100, respectively. Fixed to the rear upper surface.

  FIG. 4 shows a side sectional view of the third support 230. Since the third support 230 has a structure in which only the lower washer 206L is different from the first support 210F described above, only the lower washer 206L will be described.

  The lower washer 206L has a concave shape that opens upward. At the edge of the opening, a sharp blade portion SD is formed over the entire circumference, and the blade portion SD is disposed so as to face the lower surface of the insulator IS.

  A gap is set between the tip of the blade part SD and the insulator IS (a portion surrounded by a broken line CA in FIG. 4). This gap is caused by the displacement caused by vibration during normal running, so that the tip of the blade SD does not contact the insulator IS, and the insulator IS is deformed by a load smaller than the load capable of deforming the sill SL. An interval at which the blade SD contacts the IS and the insulator IS is cut is set.

  Similarly to the first support 210F, the third support 230 is also fixed to the upper surface of the substantially central portion of the cabin lower portion 130 of the frame 100.

  Next, the structure change unit 100Z of the frame 100 will be described.

  FIG. 5 shows a structural example of the structure changing portion 100Z of the frame 100.

  The frame 100 is such that at least one of the thickness or material of the frame 100 differs between the front of the target fracture surface TS and the rear of the target fracture surface TS, with the target fracture surface TS as a boundary. In FIG. 5, the plate thickness in front of the target fracture surface TS is t1, the plate thickness behind the target fracture surface TS is t2, and t1 ≠ t2. Thereby, the structure change part 100Z which reduced intensity | strength can be set.

  Next, the operation of this embodiment will be described.

  FIG. 6 is an explanatory view of the operation when a load input is applied from the front of the vehicle body.

  When a load input is applied from the front of the vehicle body, the load is input to the front portion 110 of the frame 100 and transmitted to the passenger compartment lower portion 130 of the frame 100. Here, a front kick-up portion 120F that is inclined upward from the passenger compartment lower portion 130 and connected to the front portion 110 is set between the passenger compartment lower portion 130 and the front portion 110. In the middle, a rear kick-up portion 120R that is inclined upward from the passenger compartment lower portion 130 and is connected to the rear portion 140 is set, and the passenger compartment lower portion 130 is disposed at a position lower than the front portion 110 and the rear portion 140. The passenger compartment lower part 130 tends to bend downward by a load applied from the front of the vehicle. Here, since the structural change portion 100Z is provided at the substantially central portion of the passenger compartment lower portion 130, the passenger compartment lower portion 130 bends with the structure change portion 100Z as a lower vertex.

  At this time, as the cabin lower portion 130 bends downward, the sill SL and the cabin lower portion 130 are separated from each other in the vertical direction. In the third support 230, the lower washer 206L is fastened by the fastening bolt 201B fastened to the sill SL. Is pulled upward, and the blade portion SD provided on the lower washer 206L cuts the insulator IS. As a result, the substantially central portion SLC of the sill SL and the cabin lower portion 130 of the frame 100 are separated, so that even if the cabin lower portion 130 bends downward, the substantially central portion SLC of the sill SL of the cabin CB is pulled downward. And the deformation of the cabin CB can be suppressed.

  Here, the blade portion SD formed on the lower washer 206L of the third support 230 is not formed on the lower washer 205L of the first support 210CBF and the second support 220CBR. In addition, when a load is applied from the front of the vehicle body, the passenger compartment lower portion 130 of the frame 100 bends with the structural change portion 100Z as a lower vertex, so that the passenger compartment lower portion 130 to which the first support 210CBF is fixed The vertical displacement and the vertical displacement on the vehicle body rear side of the passenger compartment lower part 130 to which the second support body 220CBR is fixed are smaller than the vertical displacement of the substantially central part of the passenger cabin lower part 130 to which the third support body 230 is fixed. The tensile load in the vehicle body vertical direction applied to the first support body 210CBF and the second support body 220CBR is smaller than the tensile load in the vehicle body vertical direction applied to the third support body 230. Therefore, when a load is applied from the front of the vehicle body, the first support 210CBF and the second support 220CBR are not broken, and only the third support 230 can be broken. Further, the lower washer 205L of the first support 210CBF and the second support 220CBR is not formed with the blade portion SD formed on the lower washer 206L of the third support 230, so that a sufficient fastening force is obtained. Thus, the cabin lower part 130 of the frame 100 and the sill SL can be fastened. Therefore, sufficient durability can be obtained in a normal running state.

[Example 2]
In this example, only the structure of the structure change unit 101Z is an example different from the embodiment described above, and therefore only the structure change unit 101Z will be described.

  FIG. 7 shows the structure changing unit 101Z of the present embodiment.

  In the frame 100, the vertical cross-sectional area SZ in the vehicle width direction of the frame 100 where the target fracture surface TS is located has a cross-sectional area SF of the frame 100 in front of the target fracture surface TS and a cross-sectional area SR of the frame 100 behind the target fracture surface TS. The shape is set to be smaller. Thereby, the structure change part 101Z with reduced strength can be set.

  By replacing the frame 100 having such a structure change unit 101Z with the frame 100 of the above-described embodiment, the same effect as that of the above-described embodiment can be obtained.

[Example 3]
In this example, only the structure of the structure change unit 102Z is an example different from the embodiment described above, and therefore only the structure change unit 102Z will be described.

  FIG. 8 shows the structure changing portion 102Z of the present embodiment.

  The frame 100 is provided with beads BD at the upper and lower ends of the side surface of the frame 100 where the target fracture surface TS is located. Thereby, the structure change part 102Z with reduced strength can be set.

  By replacing the frame 100 having such a structure change portion 102Z with the frame 100 of the above-described embodiment, the same effect as that of the above-described embodiment can be obtained.

  Note that the position and depth of the bead can be appropriately set as necessary.

[Example 4]
In this example, only the structure of the structure change unit 103Z is an example different from the embodiment described above, and therefore only the structure change unit 103Z will be described.

  FIG. 9 shows the structure changing unit 103Z of the present embodiment.

  The frame 100 is provided with holes HL near the upper end and the lower end of the side surface of the frame 100 where the target fracture surface TS is located. Thereby, the structure change part 103Z with reduced strength can be set.

  By replacing the frame 100 having such a structure change unit 103Z with the frame 100 of the above-described embodiment, the same effects as those of the above-described embodiment can be obtained.

  In addition, the position, number, and size of the hole HL can be appropriately set as necessary.

[Example 5]
In the present example, only the structure near the structure changing unit 104Z is an example different from the above-described embodiment, and therefore only the structure changing unit 104Z will be described.

  FIG. 10 shows the vicinity of the structure changing portion 104Z of the present embodiment.

  The frame 100 has at least one of a plate thickness and a material different from each other between the front of the target fracture surface TS and the rear of the target fracture surface TS, with the target fracture surface TS as a boundary. In FIG. 10, the plate thickness in front of the target fracture surface TS is t1, the plate thickness behind the target fracture surface TS is t2, and t1 ≠ t2. In addition, a protrusion 131F is provided on the upper surface of the frame 100 in front of the target fracture surface TS, and a protrusion 131R is provided on the upper surface of the frame 100 in the rear of the target fracture surface TS. The protrusion 131F and the protrusion 131R are firmly connected by the connecting member 132. It is connected. Thereby, stress always acts around the target fracture surface TS, and the structural change portion 104Z with reduced strength can be set.

  By replacing the frame 100 having such a structure change unit 104Z with the frame 100 of the above-described embodiment, the same effect as that of the above-described embodiment can be obtained.

[Example 6]
In the present example, only the structure of the structure change unit 105Z is different from the above-described embodiment, and therefore only the structure change unit 105Z will be described.

  FIG. 11 shows the structure changing unit 105Z of the present embodiment.

  The frame 100 is subjected to heat treatment by rapid superheating and cooling around the target fracture surface TS. As a result, a so-called residual stress is generated inside the frame 100 around the target fracture surface TS, and the structural change portion 105Z with reduced strength can be set.

  By replacing the frame 100 having such a structure change unit 105Z with the frame 100 of the above-described embodiment, the same effect as that of the above-described embodiment can be obtained.

  The area for heat treatment and the degree of heat treatment can be appropriately set as necessary.

[Example 7]
In this example, only the third support 240 having a separable structure is different from the above-described embodiment.

  FIG. 12 shows a side sectional view of the third support 240. Since the third support 240 has a structure different from the first support 210F described above only in the lower washer 207L, only the structure of the lower washer 207L and the operation when a load input is applied from the front of the vehicle. Give an explanation.

  The lower washer 207L is provided with cuts CT at four locations on the top, bottom, left and right of the through hole in the center. When a load input is applied from the front of the vehicle, as the passenger compartment lower portion 130 bends downward, the lower portion is cut by the cut CT provided in the lower washer 207L of the third support 240 provided in the vicinity of the structural change portion 100Z. The through hole of the washer 207L is enlarged, the lower washer 207L is detached from the fastening bolt 201B, and the third support 240 is separated. As a result, the substantially central portion SLC of the sill SL and the cabin lower portion 130 of the frame 100 are separated, so that even if the cabin lower portion 130 bends downward, the substantially central portion SLC of the sill SL of the cabin CB is pulled downward. And the deformation of the cabin CB can be suppressed.

  Note that the length and number of the cut CTs are not limited to those shown in the present embodiment, and can be appropriately set as necessary.

[Example 8]
In this example, only the third support 250 having a separable structure is different from the above-described embodiment.

  FIG. 13 is a side sectional view of the third support body 250. Since the third support 250 has a structure in which only the lower washer 208L is different from the first support 210F described above, only the structure of the lower washer 208L and the operation when a load input is applied from the front of the vehicle. Give an explanation.

  The lower washer 208 </ b> L is provided with small holes SH at four locations on the top, bottom, left, and right of the central through hole. When a load input is applied from the front of the vehicle, the small hole SH provided in the lower washer 208L of the third support body 250 provided near the structural change portion 100Z as the passenger compartment lower portion 130 bends downward. The through hole of the lower washer 208L is enlarged, the lower washer 208L is detached from the fastening bolt 201B, and the third support 250 is separated. As a result, the substantially central portion SLC of the sill SL and the cabin lower portion 130 of the frame 100 are separated, so that even if the cabin lower portion 130 bends downward, the substantially central portion SLC of the sill SL of the cabin CB is pulled downward. And the deformation of the cabin CB can be suppressed.

  Note that the position and number of the small holes SH are not limited to those shown in the present embodiment, and can be appropriately set as necessary.

[Example 9]
In this example, only the first support 310, the second support 320, and the third support 330 having a separable structure are examples different from the above-described embodiment. Only the structure of 310, the second support 320, the third support 330 having a separable structure, and the operation when a load input is applied from the front of the vehicle will be described.

  FIG. 14 is a side sectional view of the first support 310 (310F, 310CBF) and the second support 320 (320R, 320CBR). Hereinafter, the first support 310F will be described as an example.

  The first support 310F includes a bracket 303, an upper washer 305U, a lower washer 305L, a spacer 304, an upper insulator ISU, a lower insulator ISL, a fastening bolt 301B, and a nut 301N.

  The bracket 303 has a shape recessed downward, and has a through hole at the center of the recessed portion.

  The upper insulator ISU and the lower insulator ISL are made of a material such as rubber that absorbs vibration energy, and has a through hole in the center.

  The upper washer 305U is a dish-like member and has a through hole in the center.

  The lower washer 305L is a dish-like member and has a through hole in the center.

  The spacer 304 is a cylindrical member having a hollow inside.

  An upper insulator ISU is disposed in the recessed portion of the bracket 303. A spacer 304 is inserted into the through hole of the upper insulator ISU. An upper washer 305U is disposed on the upper portion of the spacer 304 (the upper portion of the upper insulator ISU), and the respective through holes are located concentrically. The bracket 303 is arranged in an arrangement hole 110 </ b> D provided on the upper surface of the front portion 110 of the frame 100. The spacer 304 passes through the arrangement hole 110 </ b> D and protrudes from the back surface of the upper surface of the front part 110 of the frame 100.

  On the rear surface of the upper surface of the front portion 110 of the frame 100, a spacer 304 protruding from the rear surface of the upper surface of the front portion 110 of the frame 100 penetrates the through hole of the lower insulator ISL. A lower washer 305L is disposed under the spacer 304 (a lower portion of the lower insulator ISL), and the respective through holes are located concentrically.

  The fastening bolt 301B penetrates the through hole of the lower washer 305L, the spacer 304, and the through hole of the upper washer 305U from below the lower washer 305L, and is fastened to the nut 301N above the upper washer 305U. Thereby, the first support 310 </ b> F is fixed to the upper surface of the front portion 110 of the frame 100.

  Similarly, the first support 310CBF, the second support 320R, and 320CBR also have a vehicle body front side upper surface of the cabin lower portion 130 of the frame 100, a rear portion 140 upper surface of the frame 100, and a vehicle body of the cabin lower portion 130 of the frame 100, respectively. Fixed to the rear upper surface.

  FIG. 15 shows a side sectional view of the third support 330. The third support 330 is different from the first support 310F described above only in the lower washer 306L. Therefore, only the structure of the lower washer 306L and the operation when a load input is applied from the front of the vehicle. Give an explanation.

  The lower washer 306L is provided with cuts CT at four locations on the top, bottom, left and right of the through hole in the center. When a load input is applied from the front of the vehicle, as the passenger compartment lower portion 130 bends downward, the lower portion is cut by the cut CT provided in the lower washer 306L of the third support 330 provided in the vicinity of the structural change portion 100Z. The through hole of the washer 306L is enlarged, the lower washer 306L is detached from the fastening bolt 301B, and the third support 330 is separated. As a result, the substantially central portion SLC of the sill SL is separated from the cabin lower portion 130 of the frame 100, so that even if the cabin lower portion 130 bends downward, the substantially central portion SLC of the sill SL of the cabin CB is pulled downward. And the deformation of the cabin CB can be suppressed.

  Note that the length and number of the cut CTs are not limited to those shown in the present embodiment, and can be appropriately set as necessary.

[Example 10]
In the present embodiment, only the third support 340 having a separable structure is different from the above-described ninth embodiment.

  FIG. 16 shows a side sectional view of the third support 340. Since the third support 340 is different from the first support 310F described above only in the lower washer 307L, only the structure of the lower washer 307L and the operation when a load input is applied from the front of the vehicle. Give an explanation.

  The lower washer 307L is provided with small holes SH at four positions on the top, bottom, left and right of the through hole in the center. When a load input is applied from the front of the vehicle, the small hole SH provided in the lower washer 307L of the third support 340 provided in the vicinity of the structural change portion 100Z as the passenger cabin lower portion 130 bends downward. The through hole of the lower washer 307L is enlarged, the lower washer 307L is detached from the fastening bolt 301B, and the third support 340 is separated. As a result, the substantially central portion SLC of the sill SL and the cabin lower portion 130 of the frame 100 are separated, so that even if the cabin lower portion 130 bends downward, the substantially central portion SLC of the sill SL of the cabin CB is pulled downward. And the deformation of the cabin CB can be suppressed.

  The position and number of the small holes SH are not limited to those shown in the present embodiment, and can be set as necessary.

  As described above, in the vehicle cabin mount structure of the embodiment of the present invention, the frame 100 extending in the left-right and front-rear directions of the vehicle, the cabin CB disposed on the upper surface of the frame 100, and the bottom of the cabin CB A first support 210 that fixes and supports the frame 100 and the cabin CB in front of the FL, a second support 220 that fixes and supports the frame 100 and the cabin CB behind the bottom FL of the cabin CB, and a first support 210. And a third support 230 that is fixedly supported between the frame 100 and the cabin CB, and the breaking strength of the third support 230 is the first support 210 or When the load input is applied from the front of the vehicle near the fixed position of the third support 230 in the frame 100, the frame 100 is set lower than the second support 220. Structural change unit 100Z bent towards is formed.

  According to this configuration, the frame 100 and the cabin CB are fastened by the first support 210 and the second support 220 in the front and rear of the structural change portion 100Z provided in the frame 100. Sufficient durability can be obtained in normal driving conditions. Further, when a load input is applied from the front, the structural change portion 100Z provided in the frame 100 bends downward, and the third support 230 provided in the vicinity of the structural change portion 100Z is broken and separated to form a frame. Since 100 and the substantially central portion of the bottom FL of the passenger cabin CB are separated, the bottom FL of the passenger cabin CB is not deformed by the load input.

  In the vehicle cabin mount structure according to the embodiment of the present invention, the third support member 230 is disposed and fixed in the disposition hole provided in the upper surface of the frame 100, and the bracket is provided with the through hole in the center portion. 203, an impact-absorbing insulator IS disposed on the upper surface of the bracket 203 and having a through hole in the center, and an upper washer 205U disposed in the upper portion of the insulator IS and having a through-hole in the center. A lower washer 206L, which is disposed at a lower portion of the insulator IS with a predetermined gap from the insulator IS, has a through hole at the center, and has a blade portion SD formed at a portion facing the insulator IS, and a through hole of the lower washer 206L Through the through hole of the bracket 203, the through hole of the insulator IS, and the through hole of the upper washer 205U, A fastening bolt 201B fastened to the bottom FL, and when a load input is applied from the front of the vehicle body and a tensile load is generated in the vertical direction of the vehicle body, the blade SD of the lower washer 206L cuts the insulator IS, The support 230 has a structure that breaks.

  According to this configuration, when a load input is applied from the front of the vehicle and a tensile load is generated in the vertical direction of the vehicle, the blade SD of the lower washer 206L cuts the insulator IS and the third support 230 is broken. Since the frame 100 is separated from the substantially central portion of the bottom FL of the passenger cabin CB, the bottom of the passenger cabin CB is not deformed by the load input.

  In the vehicle cabin mount structure according to the embodiment of the present invention, the third support member 230 is disposed and fixed in the disposition hole provided in the upper surface of the frame 100, and the bracket is provided with the through hole in the center portion. 203, an impact-absorbing insulator IS disposed on the upper surface of the bracket 203 and having a through hole in the center, and an upper washer 205U disposed in the upper portion of the insulator IS and having a through-hole in the center. A lower washer 207L, which is arranged at the lower part of the insulator IS and has a through hole in the center and is provided with radial cuts around the through hole, a through hole in the lower washer 207L, a through hole in the bracket 203, and an insulator A fastening bolt 201B that passes through the IS through hole and the through hole of the upper washer 205U and is fastened to the bottom FL of the passenger cabin CB. Further, when a load input is applied from the front of the vehicle body and a tensile load is generated in the vertical direction of the vehicle body, the lower washer 207L is deformed by the cut CT of the lower washer 207L, and the third support 230 is broken. .

  According to this configuration, when a load input is applied from the front of the vehicle body and a tensile load is generated in the vertical direction of the vehicle body, the lower washer 207L is deformed by the cut CT of the lower washer 207L and the third support 230 is broken. Since the frame 100 is separated from the substantially central portion of the bottom FL of the passenger cabin CB, the bottom of the passenger cabin CB is not deformed by the load input.

  In the vehicle cabin mount structure according to the embodiment of the present invention, the third support member 230 is disposed and fixed in the disposition hole provided in the upper surface of the frame 100, and the bracket is provided with the through hole in the center portion. 203, an impact-absorbing insulator IS disposed on the upper surface of the bracket 203 and having a through hole in the center, and an upper washer 205U disposed in the upper portion of the insulator IS and having a through-hole in the center. The lower washer 208L, which is disposed at the lower part of the insulator IS, has a through hole at the center and has a small hole SH around the through hole, the through hole of the lower washer 208L, the through hole of the bracket 203, and the insulator IS. And a fastening bolt 201B that passes through the through hole of the upper washer 205U and is fastened to the bottom FL of the passenger cabin CB. When subjected to any load input tensile load in the vehicle body vertical direction generated from the lower washer 208L is deformed by the small hole SH of the lower washer 208L, and a structure in which the third support 230 is broken.

  According to this configuration, when a load input is applied from the front of the vehicle and a tensile load is generated in the vertical direction of the vehicle, the lower washer 208L is deformed by the small hole SH of the lower washer 208L and the third support 230 is broken. Since the frame 100 is separated from the substantially central portion of the bottom FL of the cabin CB, the bottom of the cabin CB is not deformed by the load input.

  In the vehicle cabin mount structure according to the embodiment of the present invention, the third support 330 is arranged in the arrangement hole provided in the upper surface of the frame 100 and the bracket 303 provided with the through hole in the center. A shock absorbing upper insulator ISU disposed on the upper surface of the bracket 303 and having a through hole in the center, and an upper washer 305U disposed in the upper portion of the upper insulator ISU and having a through hole in the center. The shock absorber lower insulator ISL is disposed on the back surface of the upper surface of the frame 100 and has a through hole at the center, and the lower insulator ISL is disposed below the lower insulator ISL. The through hole is provided at the center. Of the lower washer 306L provided with radial cuts CT, the through hole of the lower washer 306L and the lower insulator ISL A fastening bolt 301B that passes through the through hole, the through hole of the bracket 303, the through hole of the upper insulator ISU, and the through hole of the upper washer 305U, and is fastened to the bottom FL of the passenger cabin CB. In addition, when a tensile load is generated in the vertical direction of the vehicle body, the lower washer 306L is deformed by the cut CT of the lower washer 306L, and the third support 330 is broken.

  According to this configuration, when a load input is applied from the front of the vehicle body and a tensile load is generated in the vertical direction of the vehicle body, the lower washer 306L is deformed by the cut CT of the lower washer 306L and the third support 330 is broken. Since the frame 100 is separated from the substantially central portion of the bottom FL of the passenger cabin CB, the bottom of the passenger cabin CB is not deformed by the load input.

  In the vehicle cabin mount structure according to the embodiment of the present invention, the third support 340 is arranged in the arrangement hole provided in the upper surface of the frame 100, and the bracket 303 provided with the through hole in the center portion. A shock absorbing upper insulator ISU disposed on the upper surface of the bracket 303 and having a through hole in the center, and an upper washer 305U disposed in the upper portion of the upper insulator ISU and having a through hole in the center. The shock absorber lower insulator ISL is disposed on the back surface of the upper surface of the frame 100 and has a through hole at the center, and the lower insulator ISL is disposed below the lower insulator ISL. The through hole is provided at the center. Lower washer 307L provided with a small hole SH around, a through hole in lower washer 307L, a through hole in lower insulator ISL, and a bra A fastening bolt 301B that passes through the through hole of the base 303, the through hole of the upper insulator ISU, and the through hole of the upper washer 305U, and is fastened to the bottom part FL of the passenger cabin CB. When a tensile load is generated in the vertical direction of the vehicle body, the lower washer 307L is deformed by the small hole SH of the lower washer 307L, and the third support 340 is broken.

  According to this configuration, when a load input is applied from the front of the vehicle and a tensile load is generated in the vertical direction of the vehicle, the lower washer 307L is deformed by the small hole SH of the lower washer 307L and the third support 340 is broken. Since the frame 100 is separated from the substantially central portion of the bottom FL of the cabin CB, the bottom of the cabin CB is not deformed by the load input.

  Further, in the vehicle cabin mount structure according to the embodiment of the present invention, in the structure changing portion 100Z, at least one of the plate thickness of the frame 100 and the material is different between the front and rear of the fixed position of the third support 230. It has.

  According to this configuration, when the strength of the structure change portion 100Z is lower than the surrounding strength and a load input is applied from the front of the vehicle body, the structure change portion 100Z is reliably bent.

  Further, in the vehicle cabin mount structure of the embodiment of the present invention, in the structure change portion 101Z, the cross-sectional area SZ in the vertical direction in the vehicle width direction of the frame 100 is the front of the structure change portion 101Z and the rear of the structure change portion 101Z. The frame 100 has a structure smaller than the vertical sectional areas SF and SR in the vehicle width direction.

  According to this configuration, when the strength of the structure change portion 101Z is lower than the surrounding strength and a load input is applied from the front of the vehicle body, the structure change portion 101Z is reliably bent.

  In the vehicle cabin mount structure of the embodiment of the present invention, the structure changing portion 102Z includes a structure in which a bead BD is provided around the frame 100.

  According to this configuration, when the strength of the structure change portion 102Z is lower than the surrounding strength and a load input is applied from the front of the vehicle body, the structure change portion 102Z is reliably bent.

  In the vehicle cabin mount structure according to the embodiment of the present invention, the structure changing portion 103Z includes a structure in which holes HL are provided around the frame 100.

  According to this configuration, when the strength of the structure change portion 103Z is lower than the surrounding strength and a load input is applied from the front of the vehicle body, the structure change portion 103Z is reliably bent.

  Further, in the vehicle cabin mount structure of the embodiment of the present invention, in the structural change portion 104Z, the plate thickness of the frame 100 and at least one of the materials are different between the front and rear of the fixed position of the third support 230. The connecting member 132 has a structure in which an external force is applied in the front-rear direction of the frame 100 on the upper surface of the frame 100.

  According to this configuration, when the strength of the structure change portion 104Z is lower than the surrounding strength and a load input is applied from the front of the vehicle body, the structure change portion 104Z is reliably bent.

  Further, in the vehicle cabin mount structure of the embodiment of the present invention, the structure changing portion 105Z has a structure subjected to heat treatment.

  According to this configuration, when the strength of the structure change portion 105Z is lower than the surrounding strength and a load input is applied from the front of the vehicle body, the structure change portion 105Z is reliably bent.

  In the vehicle passenger compartment mount structure of the embodiment of the present invention, the breaking strength of the third supports 230, 240, 250, 330, and 340 is set sufficiently smaller than the strength that deforms the bottom portion FL of the passenger cabin CB. It has a structured.

  According to this configuration, when a load input is applied from the front of the vehicle body, the third supports 230, 240, 250, 330, and 340 are reliably broken, and deformation of the bottom FL of the passenger cabin CB is suppressed.

  Furthermore, in the vehicle cabin mount structure of the embodiment of the present invention, the first support members 210 and 310, the second support members 220 and 320, and the third support members 230, 240, 250, 330, and 340 are The structure is fixed to the sill SL provided in the extending direction of the frame 100 at the bottom FL of the cabin CB.

  According to this configuration, the frame 100 and the bottom FL of the passenger cabin CB are connected by the first supports 210 and 310, the second supports 220 and 320, and the third supports 230, 240, 250, 330, and 340. It is fixed easily and reliably.

  In the vehicle cabin mount structure according to the embodiment of the present invention, the third supports 230, 240, 250, 330, and 340 are new inserts that are necessary for the support described in Patent Document 1. Since no parts are required, there is no problem that the number of parts increases, leading to an increase in cost and weight.

  As mentioned above, although the Example of this invention was explained in full detail with drawing, an Example is only an illustration of this invention and this invention is not limited only to the structure of an Example. Accordingly, it goes without saying that design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.

  For example, the method of attaching the first support 210, 310, the second support 220, 320, the third support 230, 240, 250, 330, 340 to the frame 100 is an example, and this embodiment and It is not limited to what is shown in the examples.

  Moreover, the attachment position in the flame | frame 100 of the 1st support body 210,310, the 2nd support body 220,320, the 3rd support body 230,240,250,330,340 is an example, The effect of this invention It can set suitably in the place obtained.

It is a block diagram of embodiment of this invention. It is sectional drawing of the side of the 1st support body and the 2nd support body in embodiment of this invention. It is explanatory drawing of the fixing method to the flame | frame of the 1st support body in the embodiment of this invention, a 2nd support body, and a 3rd support body. It is sectional drawing of the side of the 3rd support body which has a separable structure in embodiment of this invention. It is a block diagram of the structure change part in embodiment of this invention. It is operation | movement explanatory drawing in embodiment of this invention. It is another block diagram of the structure change part in Example 2 of this invention. It is another block diagram of the structure change part in Example 3 of this invention. It is another block diagram of the structure change part in Example 4 of this invention. It is another block diagram of the structure change part in Example 5 of this invention. It is another block diagram of the structure change part in Example 6 of this invention. It is sectional drawing of the side of the 3rd support body which has a separable structure in Example 7 of this invention. It is sectional drawing of the side of the 3rd support body which has a separable structure in Example 8 of this invention. It is sectional drawing of the side of the 1st support body in Example 9 of this invention, and a 2nd support body. It is sectional drawing of the side of the 3rd support body which has a separable structure in Example 9 of this invention. It is sectional drawing of the side of the 3rd support body which has a separable structure in Example 10 of this invention.

Explanation of symbols

100 Frame 110 Front part 110D Arrangement hole 110H Mounting hole 120F Front kick-up part 120R Rear kick-up part 130 Guest room lower part 140 Rear part 210, 210F, 210CBF First support body 220, 220R, 220CBR Second support body 230, 240 , 250 Third support 201B Fastening bolt 201N Nut 202B Fixing bolt 202N Nut 203 Bracket 204 Spacer 205U Upper washer 205L, 206L, 207L, 208L Lower washer 310, 310F, 310CBF First support 320, 320R, 320CBR Second Third support 301B Fastening bolt 301N Nut 302B Fixing bolt 302N Nut 303 Bracket 304 Spacer 305U Upper washer 305L 306L, 307L lower washer IS insulator ISU upper insulator ISL lower insulator ER engine CB room FL bottom TR trunk room SL sill CT cuts SH stoma HL pore BD bead

Claims (14)

A frame extending in the front-rear direction of the vehicle,
A guest room disposed on an upper surface of the frame;
A first support that fixes and supports the frame and the cabin in front of the bottom of the cabin;
A second support that fixes and supports the frame and the cabin at the bottom rear of the cabin;
A third support disposed between the first support and the second support and fixedly supporting the frame and the cabin;
A vehicle cabin mounting structure comprising:
While the breaking strength of the third support is set lower than the first support or the second support,
A vehicle cabin mount structure characterized in that a structure changing portion is formed in the frame in the vicinity of the fixed position of the third support so that the frame bends downward when a load input is applied from the front of the vehicle. The third support is
A bracket that is arranged and fixed in an arrangement hole provided on the upper surface of the frame, and a through hole is provided in the center;
An insulator for shock absorption, which is disposed on the upper surface of the bracket and has a through hole in the center;
An upper washer disposed at the top of the insulator and having a through hole in the center;
A lower washer that is disposed at a lower portion of the insulator with a predetermined gap with the insulator, a through hole is provided in the center, and a blade portion is formed in a portion facing the insulator;
A bolt that passes through the through hole of the lower washer, the through hole of the bracket, the through hole of the insulator, and the through hole of the upper washer, and is fastened to the bottom of the cabin;
When a load input is applied from the front of the vehicle body and a tensile load is generated in a vertical direction of the vehicle body, the blade portion of the lower washer cuts the insulator and the third support is broken. The cabin mounting structure for a vehicle body according to claim 1. The third support is
A bracket that is arranged and fixed in an arrangement hole provided on the upper surface of the frame, and a through hole is provided in the center;
An insulator for shock absorption, which is disposed on the upper surface of the bracket and has a through hole in the center;
An upper washer disposed at the top of the insulator and having a through hole in the center;
A lower washer disposed at a lower portion of the insulator, having a through hole at a central portion thereof, and having radial cuts around the through hole;
A bolt that passes through the through hole of the lower washer, the through hole of the bracket, the through hole of the insulator, and the through hole of the upper washer, and is fastened to the bottom of the cabin;
With
When a load input is applied from the front of the vehicle body and a tensile load is generated in a vertical direction of the vehicle body, the lower washer is deformed by the cut of the lower washer, and the third support is broken. The cabin mounting structure for a vehicle body according to claim 1. The third support is
A bracket that is arranged and fixed in an arrangement hole provided on the upper surface of the frame, and a through hole is provided in the center;
An insulator for shock absorption, which is disposed on the upper surface of the bracket and has a through hole in the center;
An upper washer disposed at the top of the insulator and having a through hole in the center;
A lower washer disposed at a lower portion of the insulator, provided with a through hole in a central portion thereof, and provided with a small hole around the through hole;
A bolt that passes through the through hole of the lower washer, the through hole of the bracket, the through hole of the insulator, and the through hole of the upper washer, and is fastened to the bottom of the cabin;
With
When a load input is applied from the front of the vehicle body and a tensile load is generated in the vertical direction of the vehicle body, the lower washer is deformed by the small hole of the lower washer, and the third support is broken. The cabin mounting structure for a vehicle body according to claim 1. The third support is
A bracket that is disposed in an arrangement hole provided on the upper surface of the frame, and a through hole is provided in the center;
An upper insulator for shock absorption disposed on the upper surface of the bracket and provided with a through hole in the center;
An upper washer disposed at the top of the upper insulator and having a through hole in the center;
A lower insulator for shock absorption disposed on the back surface of the upper surface of the frame and having a through hole in the center;
A lower washer disposed at a lower portion of the lower insulator, having a through hole at a central portion thereof, and having radial cuts around the through hole;
The through hole of the lower washer, the through hole of the lower insulator, the through hole of the bracket, the through hole of the upper insulator, and the through hole of the upper washer are fastened to the bottom of the cabin. With bolts,
With
When a load input is applied from the front of the vehicle body and a tensile load is generated in a vertical direction of the vehicle body, the lower washer is deformed by the cut of the lower washer, and the third support is broken. The cabin mounting structure for a vehicle body according to claim 1. The third support is
A bracket that is disposed in an arrangement hole provided on the upper surface of the frame, and a through hole is provided in the center;
An upper insulator for shock absorption disposed on the upper surface of the bracket and provided with a through hole in the center;
An upper washer disposed at the top of the upper insulator and having a through hole in the center;
A lower insulator for shock absorption disposed on the back surface of the upper surface of the frame and having a through hole in the center;
A lower washer disposed at a lower portion of the lower insulator, provided with a through hole in the center, and provided with a small hole around the through hole;
The through hole of the lower washer, the through hole of the lower insulator, the through hole of the bracket, the through hole of the upper insulator, and the through hole of the upper washer are fastened to the bottom of the cabin. With bolts,
With
When a load input is applied from the front of the vehicle body and a tensile load is generated in the vertical direction of the vehicle body, the lower washer is deformed by the small hole of the lower washer, and the third support is broken. The cabin mounting structure for a vehicle body according to claim 1.   7. The structure change portion according to claim 1, wherein at least one of a thickness and a material of the frame is different between a front position and a rear position of the third support body. Car body cabin mounting structure.   In the structural change portion, a vertical cross-sectional area in the vehicle width direction of the frame is smaller than a cross-sectional area in the vertical direction in the vehicle width direction of the frame in front of the structural change portion and behind the structural change portion. The cabin mounting structure for a vehicle body according to any one of claims 1 to 6.   The cabin mounting structure for a vehicle body according to any one of claims 1 to 6, wherein a bead is provided around the frame in the structure changing portion.   The cabin mounting structure for a vehicle body according to any one of claims 1 to 6, wherein a hole is provided around the frame in the structural change portion.   In the structural change portion, at least one of the thickness and material of the frame differs between the fixed position front and rear of the third support, and an external force is applied in the front-rear direction of the frame on the upper surface of the frame by the connecting member. The cabin mounting structure for a vehicle body according to any one of claims 1 to 6, which is added.   The cabin mounting structure for a vehicle body according to any one of claims 1 to 6, wherein the structural change portion is heat-treated.   The passenger compartment of the vehicle body according to any one of claims 1 to 12, wherein the breaking strength of the third support is set to be sufficiently smaller than a strength of deforming the bottom portion of the passenger cabin. Mount structure. The first support body, the second support body, and the third support body are fixed to a sill provided in the extending direction of the frame at the bottom of the cabin. Item 14. The vehicle body mount structure according to any one of Items 1 to 13.