CN-121989831-A - Protective cover

Abstract

The invention provides a protective cover. The heat insulating member corresponding to the boot is configured to protect the constant velocity joint extending in the direction of the axis C, and is formed of a plate-like body and has an L-shape with two distal ends when the heat insulating member is spread in a direction perpendicular to the plate thickness direction of the plate-like body. The heat insulating member has a structure in which fastening portions each having fastening holes formed therein are provided at both front end portions thereof, the heat insulating member is mounted to the transfer case in a cantilever-like manner by fastening the fastening portions, and a cutout is provided at an edge end portion of the heat insulating member on the side of the cantilever-like mounting, the cutout suppressing local concentration of stress caused by bending load generated in a cross section orthogonal to a straight line connecting the fastening portions, respectively.

Inventors

• FURUTA HIROYUKI

Assignees

• 丰田自动车株式会社

Dates

Publication Date

20260508

Application Date

20250925

Priority Date

20241106

Claims (5)

1. 1. A protective cover for protecting a rotary member extending in an axial direction, the protective cover being formed of a plate-like body and having an L-shape with two front end portions when the protective cover is spread in a direction perpendicular to a plate thickness direction of the plate-like body, wherein, Fastening parts are respectively arranged at the two front end parts, The protective cover is a cantilever-shaped structure which is installed by fastening the fastening parts respectively, A notch is provided in an edge portion of the protective cover on the side where the cantilever is attached, the notch suppressing local concentration of stress due to bending load generated in a cross section orthogonal to a straight line connecting the fastening portions, respectively.
2. 2. The protective cover of claim 1, wherein, When the protective cover is unfolded in a direction perpendicular to the plate thickness direction, the curvature of the edge end of the notch changes gently at a portion where stress due to the bending load occurs.
3. 3. The protective cover of claim 1, wherein, A plurality of flat portions and a step portion connecting adjacent flat portions among the plurality of flat portions to each other are provided on the protective cover, The cutout is provided on the flat portion.
4. 4. The protective cover of claim 1, wherein, A plurality of flat portions and a step portion connecting adjacent flat portions among the plurality of flat portions to each other are provided on the protective cover, The notch cuts the root of the step in the flat portion.
5. 5. The protective cover according to claim 1 to 4, wherein, The protective cover is configured to be attached in the cantilever shape by providing one fastening portion at each of the two distal end portions.

Description

Protective cover Technical Field The present invention relates to an L-shaped protection cover for protecting a rotating member extending in an axial direction, the protection cover being formed of a plate-shaped body and having two distal ends when the protection cover is spread in a direction perpendicular to a plate thickness direction of the plate-shaped body. Background A boot is known which is mounted in cantilever fashion, wherein a first end is fixed to the transfer case and a second end is a free end. For example, the protection cover described in Japanese patent application laid-open No. 2021-862 is such a structure. The protective cover described in japanese patent application laid-open No. 2021-862 is formed in a semicircular semi-cylindrical shape in which a half opening in the circumferential direction extends along one axis. Furthermore, the boot is supported by providing a bearing between one end fixed to the transfer case and the other end as a free end. However, as a protective cover for protecting a rotary member extending in one axial direction, it is sometimes desirable to form the protective cover in an L-shape having two front end portions, which is formed of a plate-like body and is stretched in a direction perpendicular to a plate thickness direction of the plate-like body. In this case, a structure supported by a bearing cannot be adopted like the protection cover of japanese patent application laid-open No. 2021-862. In this way, in the boot attached in the cantilever-like structure, there is a possibility that the boot may be damaged due to local concentration of stress caused by bending load. Disclosure of Invention The present invention has been made in view of the above circumstances, and an object thereof is to provide a protective cover having a cantilever-like structure, which can suppress damage caused by local concentration of stress due to bending load. The present invention provides a protection cover for protecting a rotary member extending in an axial direction, the protection cover being formed of a plate-like body and having two front end portions, when the protection cover is unfolded in a direction perpendicular to a plate thickness direction of the plate-like body, wherein the two front end portions are respectively provided with fastening portions, the protection cover is configured to be mounted in a cantilever shape by fastening the fastening portions, and a cutout is provided at an edge portion of the protection cover on a side mounted in the cantilever shape, the cutout suppressing local concentration of stress caused by bending load generated on a cross section orthogonal to a straight line connecting the fastening portions. According to the protective cover of the present invention, the two distal ends of the protective cover are each provided with a fastening portion, and the protective cover is mounted in a cantilever shape by fastening the fastening portions, and the edge end portion of the protective cover on the side mounted in the cantilever shape is provided with a notch for suppressing local concentration of stress due to bending load generated in a cross section orthogonal to a straight line connecting the fastening portions. In this way, in the protective cover having the cantilever-like structure, the provision of the notch suppresses local concentration of stress due to bending load, and thus suppresses damage to the protective cover. Drawings Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like reference numerals denote like elements, and in which: Fig. 1 is a diagram illustrating a schematic configuration of a vehicle mounted with a heat insulating member according to embodiment 1 of the present invention; Fig. 2 is a view illustrating a state in which heat insulating members are attached to a transfer case via two brackets, respectively; fig. 3 is a perspective view of the heat insulating member as viewed in the direction of arrow III shown in fig. 2; fig. 4A is a diagram illustrating the shape of the cutout provided in the heat insulating member shown in fig. 3 and the stress caused by the bending load, and is a schematic view of the heat insulating member shown in fig. 3 when the heat insulating member is expanded in a direction perpendicular to the plate thickness direction; Fig. 4B is a diagram illustrating the shape of the notch provided in the heat insulating member shown in fig. 3 and the stress caused by the bending load, and is a diagram illustrating the stress caused by the bending load generated at the portion where the notch is provided; Fig. 5 is a schematic view of the heat insulating member according to example 2 of the present invention in a state of being spread in a direction perpendicular to the plate thickness direction; FIG. 6 is a schematic view showing a heat insulating member