Associative structures

Abstract

To provide a fastening structure that reduces the load on the housing and allows fastening with bolts and nuts. [Solution] The fastening structure 1 comprises a first bus bar 2 having an insertion hole 211 formed therein, a housing 3 that holds the first bus bar 2, a nut 4 housed in a housing portion 321 formed in the housing 3 and positioned adjacent to the first bus bar 2, and a bolt 5 that passes through the insertion hole 211 and is screwed into the nut 4. The first bus bar 2 has a groove portion 212 that can accommodate the nut 4, and the groove portion 212 is configured to allow the nut 4 to be inserted in a state where the nut 4 and bolt 5 are screwed together, and to restrict the rotation of the nut 4.

Description

Technical Field

[0001] The present invention relates to a fastening structure.

Background Art

[0002] Conventionally, as related to a fastening structure, for example, as described in Patent Document 1, there is known one including a bolt and a nut for fastening a fastened object, and a housing member for housing the nut.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In such a fastening structure, there is room for improvement in that the load on a housing member or the like becomes large when fastening with a bolt and a nut. For example, when fastening with a bolt and a nut, the housing member holds the nut so that the nut does not rotate together with the bolt. At this time, there is concern that the nut presses the housing member and the load on the housing member becomes large.

[0005] Therefore, an object of the present invention is to provide a fastening structure capable of reducing the load on a housing and performing fastening with a bolt and a nut.

Means for Solving the Problems

[0006] In other words, the fastening structure according to the present invention comprises a member to be fastened having an insertion hole formed therein, a housing that holds the member to be fastened, a nut housed in a housing formed in the housing and positioned adjacent to the member to be fastened, and a bolt that passes through the insertion hole and is screwed into the nut, wherein the member to be fastened has a groove that can accommodate the nut, and the groove is configured to allow the nut to be inserted in a state in which the nut and the bolt are screwed together, and to restrict the nut from rotating together. [Effects of the Invention]

[0007] According to the fastening structure of the present invention, the load on the housing can be reduced, and fastening can be performed using bolts and nuts. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view of the fastening structure according to the embodiment. [Figure 2] Figure 2 is an exploded perspective view of the fastening structure according to the embodiment. [Figure 3] Figure 3 is a perspective view of the first busbar in the fastening structure according to the embodiment. [Figure 4] Figure 4 is an explanatory diagram of the assembly of the fastening structure according to the embodiment. [Figure 5] Figure 5 is an explanatory diagram of the assembly of the fastening structure according to the embodiment. [Figure 6] Figure 6 is an explanatory diagram of the assembly of the fastening structure according to the embodiment, and is a cross-sectional view taken along the line VI-VI in Figure 1. [Figure 7] Figure 7 is an explanatory diagram of the assembly of the fastening structure according to the embodiment, and is a cross-sectional view taken along line VII-VII in Figure 6. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited by these embodiments. Furthermore, some of the components in the following embodiments may be easily substituted or substantially identical to those that are easily substituted by those skilled in the art.

[0010] [Embodiment] This embodiment relates to a fastening structure. In the following description, of the three intersecting directions, the first direction is referred to as the "extension direction X," the second direction as the "width direction Y," and the third direction as the "fastening direction Z." Here, the extension direction X, the width direction Y, and the fastening direction Z are mutually orthogonal. Note that "orthogonal" here includes approximately orthogonal. The extension direction X corresponds to the extension direction of the busbar. The fastening direction Z corresponds to the fastening direction of the nut and bolt. Furthermore, unless otherwise specified, the directions used in the following description represent the directions when the parts are assembled together.

[0011] As shown in Figures 1 and 2, the fastening structure 1 is a structure that fastens the first bus bar 2 and the second bus bar 6 by screwing together a nut 4 and a bolt 5. It is used, for example, as a terminal block, connector, or wire harness and is mounted on a vehicle. The fastening structure 1 comprises the first bus bar 2, a housing 3, a nut 4, and a bolt 5.

[0012] The first busbar 2 is a fastened member formed of a conductive material, for example, in the shape of a plate. The first busbar 2 is fastened to the second busbar 6 by a nut 4 and a bolt 5. The first busbar 2 is formed of a material with higher strength than the housing 3, for example, in the shape of metal. Multiple first busbars 2 are arranged side by side, for example, three are arranged side by side in the width direction Y. The first busbar 2 is formed by bending a plate into a crank shape, for example. That is, the first busbar 2 has an insertion portion 21, an intermediate portion 22, and an extension portion 23. The insertion portion 21 is the portion that passes through the housing 3 and is formed along the extension direction X. The intermediate portion 22 is the portion provided by bending the end of the insertion portion 21 and is formed along the fastening direction Z. The extension portion 23 is the portion provided by bending the end of the intermediate portion 22 and is formed along the extension direction X. An insertion hole 211 is formed in the first busbar 2. The insertion hole 211 is a hole through which the bolt 5 is inserted, and is formed, for example, to penetrate the insertion portion 21 in the fastening direction Z.

[0013] As shown in Figure 3, a groove 212 is formed in the first busbar 2. The groove 212 is formed at the same position as the insertion hole 211 in the fastening direction Z, and is formed by recessing the surface of the first busbar 2 in the fastening direction Z. The groove 212 is formed to accommodate a nut 4. When the nut 4 and bolt 5 are screwed together, the groove 212 restricts the nut 4 from rotating together with the bolt 5. For example, the groove 212 is formed in a shape and size that prevents the nut 4 from rotating together with the bolt 5 when the nut 4 is inserted. Specifically, the cross-sectional shape of the groove 212 in the direction intersecting the fastening direction Z corresponds to the cross-sectional shape of the nut 4, and if the cross-sectional shape of the nut 4 is square, the cross-sectional shape of the groove 212 is also square. In addition, the groove 212 is formed to be the same size as the outer diameter of the nut 4 or larger than the outer diameter of the nut, and is provided in a size that prevents the nut 4 from rotating together. Here, the size that prevents co-rotation includes a size that prevents co-rotation beyond a predetermined angle.

[0014] As shown in Figures 1 and 2, the housing 3 is a holding member or housing member that holds the first bus bar 2, and is made of a material with lower strength than the first bus bar 2, for example, made of resin. The housing 3 has a main body portion 31 and a projection portion 32. The main body portion 31 is the part that holds the first bus bar 2 by inserting it along the extending direction X. For example, the main body portion 31 is formed in a plate shape and is arranged to intersect the extending direction X. The projection portion 32 is the part that protrudes from the surface 31A of the main body portion 31 in the extending direction X, and extends along the extending direction X. The projection portion 32 supports the first bus bar 2 that extends through the main body portion 31.

[0015] The protruding portion 32 forms a housing portion 321 and a through hole 322. The housing portion 321 and the through hole 322 are formed according to the number of first bus bars 2 installed, for example, three are formed spaced apart in the width direction Y. The housing portion 321 and the through hole 322 are formed adjacent to the position of the insertion hole 211 of the first bus bar 2 held in the housing 3. The housing portion 321 is formed in the same position as the groove portion 212 of the first bus bar 2 in the fastening direction Z (see Figure 6).

[0016] As shown in Figures 1 and 2, the housing portion 321 is the part that houses the nut 4 and is formed in a shape corresponding to the cross-sectional shape of the nut 4. For example, if the cross-sectional shape of the nut 4 in the direction intersecting the fastening direction Z is rectangular, the housing portion 321 is formed with a rectangular cross-sectional shape. The housing portion 321 is formed by recessing the adjacent surface 323 of the protruding portion 32 in the fastening direction Z. The adjacent surface 323 is the surface of the protruding portion 32 that faces and is adjacent to the first busbar 2. The nut 4 is held in place by being housed in the housing portion 321, and rotation together with the bolt 5 is suppressed when the bolt 5 is screwed in. The through hole 322 is formed by penetrating the bottom surface of the housing portion 321 in the fastening direction Z. The through hole 322 is a hole for inserting the bolt 5.

[0017] A water-sealing member 7 is assembled to the housing 3. The water-sealing member 7 is an annular packing and is provided on the surface 31A of the main body portion 31 of the housing 3 so as to surround the protruding portion 32.

[0018] The nut 4 is a member having a threaded hole through which the bolt 5 is inserted, and for example, has a square cross-sectional shape. Note that the cross-sectional shape of the nut 4 may be a shape other than square, such as a regular hexagon. The nut 4 functions as a fastening member for fastening the first bus bar 2 and the second bus bar 6 by screwing with the bolt 5. The bolt 5 is configured by forming a head with an enlarged diameter at the end of a rod-shaped threaded portion. The bolt 5 is a fastening member that is inserted into the nut 4 and screwed with the nut 4, and fastens the first bus bar 2 and the second bus bar 6 that are arranged in an overlapping manner.

[0019] The second bus bar 6 is a member that is electrically connected to the first bus bar 2 and is a fastened member fastened by the nut 4 and the bolt 5. The second bus bar 6 is formed in a plate shape and has an insertion hole 61 formed at an end portion. The insertion hole 61 is formed so as to penetrate the second bus bar 6 in the fastening direction Z. In FIGS. 1 and 2, for convenience of explanation, only a part of the second bus bar 6 is shown.

[0020] Next, the assembly of the fastening structure 1 according to the present embodiment will be described.

[0021] The assembly of the fastening structure 1 according to the present embodiment is performed, for example, by sequentially performing the assembly of the nut 4, the assembly of the first bus bar 2, and the fastening of the bolt 5.

[0022] As shown in FIG. 4, the assembly of the nut 4 is performed by housing the nut 4 in the housing portion 321 of the housing 3. For example, the housing 3 is arranged with the opening portion of the housing portion 321 facing upward. Then, the nut 4 is respectively housed in the three housing portions 321 formed in the housing 3, and the assembly of the nut 4 is performed.

[0023] Then, as shown in Figure 5, the first busbar 2 is assembled. The first busbar 2 is inserted into the housing 3 in the extending direction X and assembled. The first busbars 2 are assembled in a state where they are aligned in the width direction Y. The first busbars 2 are assembled so that the insertion holes 211 are adjacent to the nuts 4. At this time, since the nuts 4 are deeply housed in the housing portion 321, the first busbars 2 can be assembled so that the insertion holes 211 are at the position of the nuts 4 without interfering with the nuts 4. With the assembly of the first busbars 2, the insertion holes 211 and the nuts 4 are located at the same position in the fastening direction Z, and the bolt 5 can be inserted through the insertion holes 211 and the nuts 4. Here, the same position includes approximately the same position.

[0024] Then, as shown in Figure 6, the bolt 5 is fastened. That is, after the second busbar 6 is positioned so as to overlap the first busbar 2, the bolt 5 is inserted through the insertion hole 61 and the insertion hole 211 of the second busbar 6 and screwed onto the nut 4. As the bolt 5 is rotated around the axis in the fastening direction Z, the nut 4 moves in the fastening direction Z so as to approach the first busbar 2. As a result, the nut 4 is inserted into the groove 212 of the first busbar 2. That is, as the nut 4 rotates, it moves in the fastening direction Z so as to come out of the housing 321, and a part of the nut 4 is inserted into the groove 212.

[0025] Furthermore, as the bolt 5 is rotated, the nut 4 approaches the head of the bolt 5, and the first busbar 2 and the second busbar 6 are fastened together between the bolt 5 and the nut 4. At this time, as shown in Figure 7, the nut 4 is inserted into the groove 212 of the first busbar 2, and the groove 212 prevents it from rotating together with the bolt 5. The nut 4 is also housed in the housing portion 321 of the housing 3, and the housing portion 321 also prevents it from rotating together with the bolt 5, but the groove 212 of the first busbar 2 prevents it from rotating together, thus reducing the load on the housing 3. In other words, the fastening structure 1 according to this embodiment can fasten the bolt 5 and nut 4 while reducing the load on the housing 3 by preventing the nut 4 from rotating together with the housing 3 using the groove 212 of the first busbar 2. In addition, the fastening structure 1 according to this embodiment can prevent the nut 4 from rotating together with the housing 3 without increasing the strength of the housing 3 or increasing the thickness of the housing 3 to cope with the load applied to the housing 3. For this reason, the fastening structure 1 according to this embodiment can be made smaller. Once bolt 5 is fastened, the assembly of fastening structure 1 is complete.

[0026] As described above, in this embodiment, the fastening structure 1 has a groove 212 formed in the first busbar 2 that can accommodate the nut 4, thereby reducing the load applied to the housing 3 when the nut 4 and bolt 5 are screwed together.

[0027] Furthermore, in the fastening structure 1 according to this embodiment, the groove 212 is formed in a shape and size that prevents the nut 4 from rotating together, so the groove 212 of the first busbar can reliably restrict the rotation of the nut 4.

[0028] It should be noted that the fastening structure according to the present invention is not limited to the embodiments described above, and various modifications are possible within the scope described in the claims. The fastening structure 1 according to this embodiment may be constructed by appropriately combining the components of the embodiments described above.

[0029] For example, although the fastening structure 1 according to the above embodiment was described in the case where it is mounted on a vehicle, it may also be used without being mounted on a vehicle. [Explanation of Symbols]

[0030] 1: Fastening structure 2: First bus bar (fastened member) 3: Housing 4: Nut 5: Bolt 211: Through hole 212: Groove 321: Containment Unit

Claims

1. A fastened member having an insertion hole formed therein, A housing that holds the fastened member, A nut is housed in a housing formed in the housing and positioned adjacent to the fastened member, The system comprises a bolt that passes through the aforementioned insertion hole and is screwed into the aforementioned nut, The fastened member has a groove portion capable of accommodating the nut, The groove allows the nut to be inserted while the nut and bolt are screwed together, and restricts the nut from rotating together. Fastening structure.

2. The groove is formed in a shape and size such that the nut does not rotate together with the nut when it is inserted. The fastening structure according to claim 1.

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