WO2022202777A1

WO2022202777A1 - Insulator holding structure

Info

Publication number: WO2022202777A1
Application number: PCT/JP2022/013047
Authority: WO
Inventors: 一成亀谷
Original assignee: いすゞ自動車株式会社
Priority date: 2021-03-24
Filing date: 2022-03-22
Publication date: 2022-09-29
Also published as: JP2022148941A; JP7406729B2

Abstract

Provided is an insulator holding structure comprising: an insulator 16 disposed along the lower surface of a floor panel 6 of a cab 2; a pair of left and right floor side members 8 disposed extending in the front–rear direction of the vehicle body on the left and right sides, respectively, in the vehicle width direction below the floor panel 6; and a pair of left and right mud valance panels 10 which are disposed extending in the front–rear direction of the vehicle body on the left and right sides, respectively, in the vehicle width direction inside the pair of left and right floor side panels 8 in the vehicle width direction and which are secured to the pair of left and right floor side panels 8, respectively. Each of the pair of left and right mud valance panels 10 has a rib 15 in the upper surface thereof, the rib 15 being disposed extending in the front–rear direction of the vehicle body so as to project upward. The insulator 16 is held between the floor panel 6 and the rib 15 of each of the pair of left and right mud valance panels 10.

Description

Insulator holding structure

The present disclosure relates to a vehicle insulator holding structure.

Patent Document 1 discloses an insulator mounting structure (insulator holding structure) arranged along the lower surface of the floor panel of the cab. Insulators are shields that reduce the transfer of heat and sound from the engine to the cab and are fixed to the floor panel at multiple fixing points.

Japanese Patent Application Laid-Open No. 2017-030427

In the above-mentioned conventional structure, it is required to reduce the fixing points of the insulator to the floor panel from the viewpoint of workability, and it is sometimes equipped with a mud balance that reduces the emission of sound from the engine to the outside.

Therefore, an object of the present disclosure is to provide an insulator holding structure capable of reducing fixing points of the insulator to the floor panel by providing a mud balance.

In order to achieve the above object, the insulator holding structure of the first aspect of the present disclosure includes insulators arranged along the lower surface of the floor panel of the cab, and insulators extending in the vehicle front-rear direction on both sides in the vehicle width direction below the floor panel. a pair of left and right floor side members arranged extending along the left and right floor side members; a pair of left and right mud balances fixed to each of the pair of floor side members, each of the pair of left and right mud balances extending along the front-rear direction of the vehicle body so as to protrude upward from the upper surface of the mud balance. The insulator is sandwiched between the floor panel and the ribs of each of the pair of left and right mud balances.

In the above configuration, the insulator is sandwiched between the floor panel and the ribs of each of the pair of left and right mud balances. Therefore, the number of fixing points of the insulator to the floor panel can be reduced.

A second aspect of the present disclosure is the insulator holding structure of the first aspect, in which the insulator is sandwiched along the longitudinal direction of the vehicle body at both left and right ends in the vehicle width direction.

In the above configuration, the insulator is sandwiched along the front-rear direction of the vehicle body at the left and right end portions in the vehicle width direction, so fixing points to the floor panel are not required over a wide range. Therefore, the number of fixing points of the insulator to the floor panel can be further reduced.

According to the present disclosure, the number of fixing points of the insulator to the floor panel can be reduced by providing the mud balance.

FIG. 1 is an external perspective view of a cab that employs an insulator holding structure according to an embodiment of the present disclosure, viewed from the rear underfloor. 2 is a cross-sectional view of the cab of FIG. 1 as viewed in the direction of arrow II. FIG. 3 is an external perspective view of the right mud balance peripheral portion of the cab of FIG. 1 as viewed from under the floor, omitting the insulator.

An embodiment of the present disclosure will be described below with reference to the drawings. In the following description, the front-rear direction means the front-rear direction of the vehicle 1, and the left-right direction means the left-right direction when the vehicle 1 faces forward. Arrow FR in the drawing indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction.

A vehicle 1 shown in FIGS. 1 to 3 is a cab-over type truck in which an engine room 3 is located below a cab 2. The cab 2 is tiltably supported forward by a front cab mount (not shown) and a rear cab mount (not shown) attached to a front portion of a vehicle body frame (not shown).

The cab 2 is a substantially box-shaped body and partitions the compartment inside. The cab 2 has a dash panel (not shown), a back panel 4, a pair of left and right side panels 5, a roof panel (not shown), a floor panel 6, and the like. These panels are made of high-strength materials such as steel plates, and are formed by press forming. These panels are also joined by spot welding or the like.

The floor panel 6 is a substantially rectangular plate-like body, and has a center floor panel portion 7 , a pair of left and right floor side members 8 , and a pair of left and right side floor panel portions 9 . These are formed by press working or the like.

The center floor panel portion 7 is formed in the center in the vehicle width direction and extends from the front end to the rear end of the floor panel 6 . The floor side members 8 are formed as a pair on the left and right sides of the center floor panel portion 7 and extend from the front end to the rear end of the floor panel 6 . The floor side member 8 is a floor underframe having a U-shaped cross section and protruding downward. A pair of left and right side floor panel portions 9 are formed on both sides in the vehicle width direction with the center floor panel portion 7 and a pair of left and right floor side members 8 interposed therebetween, and extend from the front end to the rear end of the floor panel 6 .

A pair of left and right mud balances 10 are arranged inside the pair of left and right floor side members 8 in the vehicle width direction. A pair of left and right mud balances 10 are sound absorbing materials made of resin or the like, and are arranged along the front-rear direction on both sides in the vehicle width direction, so that the sound generated by the engine (not shown) is reduced to the wheel house ( (illustration omitted) to reduce the discharge to the outside. Each of the left and right mud balances 10 is configured by connecting an upper mud balance 11 having a U-shaped cross section and a lower mud balance 12 having a L-shaped cross section to each other with a clip (not shown). The left and right mud balances 10 are arranged such that the vehicle width direction outer surface of the mud balance upper portion 11 is in contact with the vehicle width direction inner surface of the floor side member 8 , and the vehicle width direction inner surface of the floor side member 8 is in contact with the vehicle width direction inner surface. A weld nut 13 (one weld nut 13 is shown in FIG. only the nut 13 is shown), and a bolt insertion hole 11a formed in the outer surface of the mud balance upper portion 11 in the vehicle width direction (only one bolt insertion hole 11a is shown in FIG. 2). ) (only one bolt 14 is shown in FIG. 2) to be fastened and fixed to the floor side member 8 . Each of the left and right mud balances 10 has a rib 15 on the upper surface of the mud balance upper portion 11 that extends in the front-rear direction so as to protrude upward.

An insulator 16 is arranged along the lower surface of the center floor panel portion 7 below the floor panel 6 . The insulator 16 is a heat-insulating and sound-absorbing material made by covering a plate material made of fibers or the like with aluminum foil or the like. The balance 10 is fixed to the floor panel 6 by sandwiching the left and right ends in the vehicle width direction with the ribs 15 of each of the balances 10 . The insulator 16 blocks entry of heat and sound generated by the engine (not shown) into the passenger compartment.

The engine room 3 below the cab 2 is arranged between the left and right floor side members 8 and supported by the body frame (not shown) via engine mounts (not shown).

According to this embodiment, the insulator 16 is sandwiched between the floor panel 6 and the ribs 15 of each of the pair of left and right mud balances 10, so that the sandwiched portion is fixed to the floor panel 6. becomes unnecessary. Therefore, the number of fixing points of the insulator 16 to the floor panel 6 can be reduced.

In addition, according to the present embodiment, the insulator 16 is sandwiched along the longitudinal direction of the vehicle body at the left and right end portions in the vehicle width direction, so fixing points to the floor panel 6 are not required in a wide range. Therefore, the number of fixing points of the insulator 16 to the floor panel 6 can be further reduced.

Although the present disclosure has been described above based on the above embodiments, the present invention is not limited to the contents of the above embodiments, and can be appropriately modified without departing from the scope of the present invention. In other words, all other embodiments, examples, operation techniques, etc. made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention.

This application is based on a Japanese patent application (Japanese Patent Application No. 2021-050827) filed on March 24, 2021, the contents of which are incorporated herein by reference.

The present invention is applicable to vehicles to which insulators are attached.

1 vehicle 2 cab 3 engine room 4 back panel 5 side panel 6 floor panel 7 center floor panel portion 8 floor side member 8a bolt insertion hole 9 side floor panel portion 10 mud balance 11 mud balance upper portion 11a bolt insertion hole 12 mud balance lower portion 13 Weld Nut 14 Bolt 15 Rib 16 Insulator 17 Clip

Claims

an insulator positioned along the underside of the floor panel of the cab;
a pair of left and right floor side members arranged to extend along the longitudinal direction of the vehicle body on both left and right sides in the vehicle width direction below the floor panel;
Left and right 1 arranged to extend along the longitudinal direction of the vehicle body on both left and right sides in the vehicle width direction inside the pair of left and right floor side members in the vehicle width direction, and fixed to each of the pair of left and right floor side members. with a pair of mud balances,
each of the pair of left and right mud balances has, on its upper surface, a rib extending along the longitudinal direction of the vehicle body so as to project upward;
The insulator holding structure, wherein the insulator is sandwiched between the floor panel and the ribs of each of the pair of left and right mud balances.
The insulator holding structure according to claim 1,
An insulator holding structure, wherein the insulator is held at both ends in the vehicle width direction along the longitudinal direction of the vehicle body.