Linked structure of multiple parts

Abstract

In a multi-part connecting structure, the gap between the mating surfaces of two parts that sandwich a sealing material is kept constant, ensuring stable sealing performance without damaging the sealing material. [Solution] The connecting structure of multiple parts comprises a first part 1, a second part 2 and a third part 3, each having a second and third mating surface 2a and 3a, respectively, that are opposite to the first mating surface 1a of the first part 1, the second part 2 and the third part 3 are placed side by side and connected, a sealing material S (S1, S2) is interposed between the first mating surface 1a of the first part 1 and the second and third mating surfaces 2a and 3a of the second part 2 and the third part 3, and the first part 1 and the second part 2 are bolted together, the first mating surface 1a of the first part 1 is provided with a convex pin portion 10, and the third mating surface 3a of the third part 3 is provided with a recess 20 against which the convex pin portion 10 abuts.

Description

Technical Field

[0005]

[0001] The present invention relates to a connection structure of a plurality of components.

Background Art

[0002] In a connection structure of a plurality of components, for example, as shown in FIG. 4, there are a first component 1, a first mating surface 1a of the first component 1, and a second and a third mating surface 2a, 3a of the second component 2 and the third component 3 that face the first mating surface 1a of the first component 1, respectively. At this time, the second component 2 and the third component 3 are juxtaposed and connected to each other, and a sealing material S is interposed between the first mating surface 1a of the first component 1 and the second and third mating surfaces 2a, 3a of the second component 2 and the third component 3, and the first component 1 and the second component 2 are fastened using a bolt B. The sealing material S is sandwiched between the first mating surface 1a of the first component 1 and the second mating surface 2a of the second component 2, and between the first mating surface 1a of the first component 1 and the third mating surface 3a of the third component 3.

[0003] [[ID=z15]] In addition, Patent Document 1 proposes a method that can ensure stable sealing performance at the fastening part when sandwiching a sealing material between opposing mating surfaces of two fastened components. In this prior art, one component has a recess for accommodating the sealing material. The other component has a protrusion that protrudes into the recess when the two components are joined. The sealing material is fixed in the recess so as to fit into the recess when the two components are joined. And when the two components are joined, the protrusion is pushed into the sealing material.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in conventional multi-part connecting structures, the gap between the two parts that sandwich the sealing material is not constant due to dimensional tolerances of each part, and there is a risk that a consistent thickness cannot be ensured for the sealing material sandwiched between the two parts. As a result, excessive clamping force may be applied to the sealing material, damaging it and making it impossible to ensure stable sealing performance.

[0006] Furthermore, in the connecting structure between the first component 1 and the second and third components 3 shown in Figure 4, if the first component 1 is deformed by the fastening force of the bolt B that fastens the first component 1 and the second component 2, the gap between the first mating surface 1a of the first component 1 and the third mating surface 3a of the third component 3, which sandwich the sealing material S, becomes excessively small due to the dimensional tolerances of each component 1, 2, and 3. This can damage the sealing material S interposed between the two mating surfaces 1a and 3a, making it impossible to ensure stable sealing performance.

[0007] The object of the present invention is to ensure stable sealing performance in a multi-part connecting structure by keeping the gap between the mating surfaces of two parts that sandwich a sealing material constant, without damaging the sealing material. [Means for solving the problem]

[0008] The invention according to claim 1 is a multi-part connecting structure comprising a first part and a second part and a third part, each having a second and a third mating surface that faces a first mating surface of the first part, wherein the second part and the third part are placed side by side and connected to each other, a sealing material is interposed between the first mating surface of the first part and the second and third mating surfaces of the second part and the third part, and the first part and the second part are bolted together, wherein a convex pin portion is provided on the first mating surface of the first part, and a recess is provided on the third mating surface of the third part against which the convex pin portion abuts. [Effects of the Invention]

[0009] In a multi-part connecting structure, a protruding pin is provided on the first mating surface of the first part, and a recess is provided on the third mating surface of the third part, against which the protruding pin abuts. This ensures a constant gap between the mating surfaces of the first and third parts that sandwich the sealing material, and guarantees a constant thickness for the sealing material sandwiched between these parts. Consequently, excessive clamping force is not applied to the sealing material, and as a result, stable sealing performance can be ensured without damaging the sealing material.

[0010] Furthermore, there is no need to provide recesses or protrusions over a wide area along the longitudinal direction of the seal between the two parts that sandwich the sealing material, making it easy to ensure the strength of each part is maintained. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 shows one embodiment of the present invention, where (A) is an overall cross-sectional view and (B) is an enlarged cross-sectional view of a key part. [Figure 2] Figure 2 shows the main part of the present invention, where (A) is a perspective view showing the state in which the convex pin portion has not protruded into the recess, and (B) is a cross-sectional view showing the state in which the convex pin portion has abutted against the bottom surface of the recess. [Figure 3] Figure 3 is a schematic diagram illustrating an example of the application of the present invention. [Figure 4] Figure 4 is a cross-sectional view showing a conventional structure. [Modes for carrying out the invention]

[0012] The present invention can be applied to vehicle power and drive system components, for example, as shown in Figure 3, by assembling and connecting multiple components (first component 1, second component 2, third component 3, fourth component 4) that form the electronics room A, motor room M, and gear room G in one place, and by sharing the walls that separate the functions of each room, it is possible to miniaturize power and drive system components.

[0013] Furthermore, the multi-part connecting structure according to the present invention can be used in the connecting structure of three parts, namely the first part 1, the second part 2, and the third part 3, as shown in Figure 3 (and can also be used in the connecting structure of three parts, namely the first part 1, the third part 3, and the fourth part 4).

[0014] In other words, as shown in Figure 1, the above-mentioned connecting structure of the three parts includes a first part 1 and a second part 2 and a third part 3, each having mating surfaces 2a and 3a of the second and third parts 2 and 3, respectively, which are opposite the first mating surface 1a of the first part 1. At this time, the second part 2 and the third part 3 are placed side by side and connected by connecting means such as a connecting pin 5. Furthermore, with a sealing material S interposed between the first mating surface 1a of the first part 1 and the second and third mating surfaces 2a and 3a of the second part 2 and the third part 3, the first part 1 and the second part 2 are fastened together using a bolt B1, and the first part 1 and the third part 3 are fastened together using a bolt B2. Furthermore, the sealing material S is compressed between the first mating surface 1a of the first part 1 and the second mating surface 2a of the second part 2, and between the first mating surface 1a of the first part 1 and the third mating surface 3a of the third part 3.

[0015] In the example shown in Figure 1, due to the dimensional tolerances of the first part 1, the second part 2, and the third part 3, the gap δ2 between the first mating surface 1a of the first part 1 and the third mating surface 3a of the third part 3 is smaller than the gap δ1 between the first mating surface 1a of the first part 1 and the second mating surface 2a of the second part 2. That is, the fastening force of the bolt B1 fastening the first part 1 and the second part 2 causes the first part 1 to deform (bend), and as a result, the gap between the first mating surface 1a of the first part 1 and the third mating surface 3a of the third part 3, which sandwich the sealing material S (sealing material S1 and sealing material S2), becomes smaller due to the dimensional tolerances of each part 1, 2, and 3. As a result, among the sealing materials S, the sealing material S2 that is pressed in the small gap δ2 between the first mating surface 1a of the first part 1 and the third mating surface 3a of the third part 3 is compressed more than the sealing material S1 that is pressed between the first mating surface 1a of the first part 1 and the second mating surface 2a of the second part 2. Here, the sealing materials S1 and S2 can be in the form of continuous plates of the same thickness in their free state before being interposed between the parts.

[0016] In this embodiment, the sealing material S2 interposed in the small gap δ2 between the two mating surfaces 1a and 3a is subjected to damage caused by large compressive forces around the corner portion 3b of the third part 3, which is closest to the first mating surface 1a of the first part 1 that is deflected and deformed by the fastening force of the bolt B1, and in order to ensure stable sealing performance, the following configuration is adopted.

[0017] In other words, in this embodiment, as shown in Figures 1 and 2, a protruding pin portion 10 is provided on the first mating surface 1a of the first component 1, and a recess 20 is provided on the third mating surface 3a of the third component, against which the protruding pin portion 10 abuts. The tip surface 11 of the protruding pin portion 10 abuts against the bottom surface 21 of the hole in the recess 20 (Figures 1(B) and 2(B)).

[0018] This ensures that the small gap δ2 between the mating surfaces 1a and 3a of the first and third parts 1 and 3 is kept constant, and that a constant thickness is ensured for the sealing material S2 that is pressed between these parts 1 and 3. Therefore, excessive clamping force is not applied to the sealing material S2, and as a result, stable sealing performance can be ensured without damaging the sealing material S2.

[0019] At this time, the gap δ1 between the mating surfaces 1a and 2a of the first and second components 1 and 2 is larger than the above-mentioned small gap δ2, and the clamping pressure exerted on the sealing material S1 sandwiched between these two components 1 and 2 does not become larger than the clamping pressure exerted on the sealing material S2, and stable sealing performance can be ensured without damaging the sealing material S1.

[0020] In FIG. 2(A), L indicates a seal line where the sealing material S (S1, S2) is provided. In the present embodiment, the seal line L extends to a position that does not overlap with the installation portions of the convex pin portions 10 and the concave portions 20.

[0021] In addition, in the present embodiment, the sealing material S (S1, S2) is not penetrated by the bolts B1, B2 or the convex pin portions 10 as shown in FIGS. 1 and 2 (particularly, refer to the seal line L).

[0022] Further, the convex pin portion 10 may be integrally formed with the first component 1, or may be formed by inserting and fixing a knock pin into the first component 1 (the insertion end surface of the knock pin needs to abut against the bottom surface of the knock pin insertion hole without a gap).

[0023] In addition, two convex pin portions 10 are provided on the first mating surface 1a of the first component 1. One convex pin portion 10 abuts against the concave portion 20 provided on the third mating surface 3a of the third component 3, and the other convex pin portion 10 also abuts against the concave portion 20 provided on the second mating surface 2a of the second component 2.

[0024] In addition, in order to minimize the displacement amount of the first mating surface 1a of the first component 1 that deflects and deforms due to the fastening force of the bolt B1 approaching the corner portion 3b of the third component 3 and suppress damage to the sealing material S2 around this corner portion 3b, as shown in FIG. 1(B), it is preferable that the installation distance d of the convex pin portion 10 provided on the first component 1 with respect to the corner portion 3b of the third component 3 is small.

[0025] Although embodiments of the present invention have been described in detail with reference to the drawings above, the specific configuration of the present invention is not limited to these embodiments, and any design changes or other modifications that do not depart from the spirit of the present invention are also included in the present invention. [Industrial applicability]

[0026] According to the present invention, in a connecting structure of multiple parts, the gap between the mating surfaces of two parts that sandwich a sealing material can be kept constant, and stable sealing performance can be ensured without damaging the sealing material. [Explanation of symbols]

[0027] 1. First part 1a First mating surface 2. Second part 2a Second mating surface 3. The third part 3a Third mating surface 10 Convex pin section 20 recesses B, B1, B2 bolts S, S1, S2 sealants

Claims

[Claim 1] It comprises a first component, and a second component and a third component, each having a second and a third mating surface that faces a first mating surface of the first component. The second and third parts are placed side by side and connected, and a sealing material is interposed between the first mating surface of the first part and the second and third mating surfaces of the second and third parts. The first and second parts are connected by bolts, forming a multi-part linkage structure. A convex pin portion is provided on the first mating surface of the first part. A multi-part connecting structure in which the third mating surface of the third part is provided with a recess that the convex pin portion abuts against.

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