JP2011165571A - Fastening structure and fastening method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain firm fastening without depending on shapes of fastened members by making a contact pressure member generate contact pressure force as a projected section of a connector upper part is inserted into a recessed section of a connector lower part. <P>SOLUTION: A fastening structure 100 having the connector lower part 110 with a recessed section 111 and the connector upper part 120 with the projected section 121 inserted into the recessed section 111 includes the contact pressure member (cam mechanism 112) arranged at a gap made of the recessed section 111 and the projected section 121 when the projected section 121 of the connector upper part 120 is inserted into the recessed section 111 of the connector lower part 110 and both parties are fitted to each other and keeping contact pressure force between the connector lower part 110 and the connector upper part 120. The contact pressure member generates the contact pressure force as the projected section 121 of the connector upper part 120 is inserted into the recessed section 111 of the connector lower part 110. Thus, firm fastening of the fastening structure 100 can be attained without depending on the shapes of the fastened members since it is not necessary to deform either of members in order to fasten bus bars included in the connector lower part 110 and the connector upper part 120. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fastening structure and a fastening method of the fastening structure.

  For connection of bus bars that carry large currents used in inverters for automobiles, etc., connection reliability is increased to keep contact resistance low and to prevent occurrence of momentary interruptions due to high vibration level disturbances. For this reason, it is desirable that a high contact pressure is maintained and that fastening is performed with no gaps. As such a fastening method, for example, in Patent Document 1, the hole portions of two metal plates having holes with different diameters are overlapped with each other, and a fastening member is inserted into the hole from the direction of the plate having a smaller diameter. The fastening method is described. In this fastening method, when the fastening member is inserted into the hole portion, the periphery of the hole portion of the plate having the small diameter is deformed so as to fill the hole portion of the plate having the large diameter.

JP 2001-146912 A

  However, in the fastening method described in Patent Document 1, it is necessary that the member having a small diameter of the two members to be fastened has a thin plate shape that can be deformed by inserting the fastening member. Application is difficult when both of the fastening members are not plate-like members.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a fastening structure that can be firmly fastened regardless of the shape of a member to be fastened, and a fastening method of the fastening structure. .

  In order to solve the above-described problem, a fastening structure according to the present invention is a fastening structure including a first fastened member having a recess and a second fastened member having a convex portion inserted into the concave portion. When the convex part of a 2nd to-be-fastened member is inserted in the recessed part of a to-be-fastened member, and both fit, it arrange | positions in the clearance gap which a recessed part and a convex part make, Between a 1st to-be-fastened member and a 2nd to-be-fastened member A contact pressure member that holds the contact pressure, and the contact pressure member is configured to generate contact pressure as the convex portion of the second fastened member is inserted into the concave portion of the first fastened member. Features.

  Similarly, in order to solve the above-described problem, a fastening method according to the present invention is a fastening structure including a first fastened member having a concave portion and a second fastened member having a convex portion inserted into the concave portion. A method of inserting a convex portion of a second fastened member into a concave portion of a first fastened member, and a pressure contact member arranged in a gap formed by the concave portion and the convex portion as the convex portion is inserted Generating a contact pressure between the first fastened member and the second fastened member by the step, and when the first fastened member and the second fastened member are fitted, the first fastened member and the second fastened member are Holding a contact pressure between the two fastened members.

  According to such a fastening structure and fastening method, when the first fastened member and the second fastened member are fitted, the gap formed by the concave portion of the first fastened member and the convex portion of the second fastened member The contact pressure member is disposed between the first fastened member and the second fastened member to maintain the contact pressure. For this reason, since it is not necessary to deform any member in order to fasten the 1st to-be-fastened member and the 2nd to-be-fastened member, firm fastening can be performed regardless of the shape of the to-be-fastened member. Thus, if the 1st to-be-fastened member and the 2nd to-be-fastened member are fastened firmly, the contact resistance between both can be kept low and connection reliability can be improved. Further, the contact pressure member is configured to generate contact pressure as the convex portion of the second fastened member is inserted into the concave portion of the first fastened member. Since there is no contact pressure with the second member to be fastened, the fastening work can be easily performed.

  Moreover, it is preferable that the contact pressure member is a cam mechanism that can be rotated at the time of insertion.

  Similarly, the pressure contact member is preferably a permanent deformation member that is permanently deformed at the time of insertion or an elastic deformation member that is elastically deformed at the time of insertion. Furthermore, the permanent deformation member and the elastic deformation member are preferably bus bars.

  According to the fastening structure and the fastening method according to the present invention, firm fastening can be performed regardless of the shape of the fastened member.

It is a figure which shows the structure and fastening process of the fastening structure 100 which concern on 1st embodiment of this invention. It is a figure which shows the structure and fastening process of the fastening structure 200 which concerns on 2nd embodiment of this invention. It is a figure which shows the structure and fastening process of the fastening structure 300 which concerns on 3rd embodiment of this invention. It is a figure which shows an example of the structure at the time of applying the fastening structure 100,200,300. It is a figure which shows an example of the structure at the time of applying the fastening structure 100,200,300.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Unless otherwise specified, the vertical and horizontal directions indicate directions in the explanatory drawings. In the description of the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a diagram showing a configuration and a fastening process of a fastening structure 100 according to the first embodiment of the present invention.

  As shown in FIG. 1A, the fastening structure 100 has a connector structure including a connector lower part 110 and a connector upper part 120. A convex portion 121 is provided at the lower end of the connector upper portion 120, and a concave portion 111 is provided at the upper end of the connector lower portion 110. The fastening structure 100 is accommodated in each of the connector lower part 110 and the connector upper part 120 by inserting the convex part 121 of the connector upper part 120 into the concave part 111 of the connector lower part 110 and fitting the connector lower part 110 and the connector upper part 120 together. The bus bars 130a and 130b are connected.

  A cam mechanism 112 is provided in the concave portion 111 of the connector lower portion 110 as a pressure contact member for pressing and fixing the bus bars 130a and 130b when the connector lower portion 110 and the connector upper portion 120 are fitted. The cam mechanism 112 includes a cam and a rotating shaft, and the cam has a shape (for example, approximately elliptical) whose distance from the rotation center of the rotating shaft is not constant, and is attached to the rotating shaft. The cam mechanism 112 is provided so that the cam can be rotated around a rotation axis orthogonal to the insertion direction of the connector upper portion 120. In the cam mechanism 112, when the connector lower part 110 and the connector upper part 120 are not fitted, the major axis direction of the cam is obliquely upward, and the upper end of the cam is substantially the same height as the end part of the recess 111. It is provided as follows. In addition, after the connector lower portion 110 and the connector upper portion 120 are fitted, as shown in FIG. 1C, the cam is pushed downward by the convex portion 121 of the connector upper portion 120 and rotated, and the major axis direction of the cam is changed. The bus bars 130a and 130b are pressed and fixed in the left-right direction.

  Further, a spread preventing metal fitting 113 is provided on the outer periphery of the connector lower portion 110, and the concave portion 111 of the connector lower portion 110 is expanded and deformed by the contact pressure by the cam mechanism 112 when the connector lower portion 110 and the connector upper portion 120 are fitted. It is configured to prevent and maintain the contact pressure to the bus bars 130a and 130b.

  A slide absorbing mechanism 122 is provided on the bus bar 130 b of the connector upper portion 120. The slide absorbing mechanism 122 is formed to be elastically deformable by curving the bus bar 130b to the side, and deforms in a direction in which the vertical length of the bus bar 130b is contracted with respect to an external force applied in the vertical direction of the bus bar 130b. It is configured. As shown in FIG. 1A, the bus bar 130b protrudes downward from the convex portion 121 in a state where the connector lower portion 110 and the connector upper portion 120 are not fitted, and can be easily inserted into the connector lower portion 110. It is configured as follows. As shown in FIG. 1C, the protruding lower end of the bus bar is absorbed into the upper portion of the connector 120 by elastic deformation of the slide absorbing mechanism 122 and coincides with the vertical position of the lower end of the convex portion 121. It becomes like this.

  Next, the operation of the fastening structure 100 will be described.

  The connector upper portion 120 is moved downward from the state where the connector lower portion 110 and the connector upper portion 120 are separated as shown in FIG. 1A, and the bus bar 130b and the convex portion of the connector upper portion 120 as shown in FIG. 1B. 121 is inserted into the recess 111 of the connector lower portion 110.

  When the bus bar 130b of the connector upper portion 120 reaches the bottom of the concave portion of the connector lower portion 110 and the insertion of the bus bar is completed, the connector upper portion 120 contacts the cam mechanism 112. Until this state, the force that presses the bus bars 130a and 130b against each other by the cam mechanism 112 does not work, so that the insertion load is kept at zero.

  When the connector upper part 120 is further moved downward after contacting the cam mechanism 112, as shown in FIG. 1C, the displacement of the bus bar 130b is absorbed by the slide absorbing mechanism 122, while the connector upper part 120 is moved downward. The cam mechanism 112 is rotated downward in response to the pushing. As the cam mechanism 112 rotates, contact pressure is gradually generated from the cam mechanism 112 in the direction in which the bus bars 130a and 130b are pressed against each other, and the connector upper portion 120 is completely fitted with the connector lower portion 110 so that the relative movement becomes zero. At this point, the joining is complete. In this state, the cam mechanism 112 is adjusted so as to be fixed at a position where the maximum pressure contact force is applied to the bus bars 130a and 130b, and the change in the pressure contact force is caused even when a slight vertical displacement occurs due to external vibration. It can keep the state where there is little.

  According to such a fastening structure 100, when the connector lower portion 110 and the connector upper portion 120 are fitted, the cam mechanism 112 disposed in the gap formed by the concave portion 111 of the connector lower portion 110 and the convex portion 121 of the connector upper portion 120. The contact pressure is maintained between the bus bars 130a and 130b. For this reason, since it is not necessary to deform any member in order to fasten bus bars 130a and 130b, firm fastening can be performed regardless of the shape of the fastened member. Thus, if the bus bars 130a and 130b are firmly fastened, the contact resistance between them can be kept low and the connection reliability can be improved. Further, since the cam mechanism 112 is configured to generate a contact pressure as the convex portion 121 of the connector upper portion 120 is inserted into the concave portion 111 of the connector lower portion 110, the connector lower portion 110 and the connector upper portion 120 are Since there is no contact pressure between them, the fastening operation can be easily performed.

  Furthermore, with such a structure, high contact pressure and vibration resistance can be ensured only by the insertion in one direction (downward in FIG. 1), and highly reliable electrical joining is realized.

  FIG. 2 is a diagram showing a configuration and a fastening process of the fastening structure 200 according to the second embodiment of the present invention.

  The fastening structure 200 according to the present embodiment uses, for example, a spring member 212 formed by processing a bar in a spiral shape instead of the cam mechanism 112 of FIG. 1 as a pressure contact member provided in a concave portion of the connector lower portion 210. This is different from the fastening structure 100 of the first embodiment.

  As shown in FIG. 2A, the spring member 212 is formed so as to have substantially the same height as the depth of the recess 111 in the initial state. As the connector upper part 120 is inserted, it is compressed downward by the connector upper part 120 as shown in FIG.

  Finally, as shown in FIG. 2C, permanent deformation or elastic deformation is performed so as to be reduced to the size of the gap between the convex portion 121 and the concave portion 111. In this state, the shape of the spring member 212 is adjusted so that the direction of the load is only the direction in which the bus bars 130a and 130b are pushed. For this reason, application of a high contact pressure to the bus bars 130a and 130b can be expected. Further, it is possible to absorb vibrations caused by disturbance due to the spring characteristics of the spring member and to always keep a high contact pressure against the bus bar.

  Furthermore, according to such a fastening structure 200, when the connector lower part 210 and the connector upper part 120 are fitted, the spring member disposed in the gap formed by the concave part 111 of the connector lower part 210 and the convex part 121 of the connector upper part 120. By 212, the contact pressure is maintained between the bus bars 130a and 130b. For this reason, since it is not necessary to deform any member in order to fasten bus bars 130a and 130b, firm fastening can be performed regardless of the shape of the fastened member. Thus, if the bus bars 130a and 130b are firmly fastened, the contact resistance between them can be kept low and the connection reliability can be improved. Further, since the spring member 212 is configured to generate a contact pressure as the convex portion 121 of the connector upper portion 120 is inserted into the concave portion 111 of the connector lower portion 210, the connector lower portion 210 and the connector upper portion 120 are Since there is no contact pressure between them, the fastening operation can be easily performed.

  In addition, with such a structure, high contact pressure and vibration resistance are ensured only by inserting in one direction (downward in FIG. 2), and highly reliable electrical joining is realized.

  FIG. 3 is a diagram illustrating a configuration and a fastening process of a fastening structure 300 according to the third embodiment of the present invention.

  As shown in FIG. 3A, the fastening structure 300 according to the present embodiment has a lower end of the bus bar 130b of the connector upper portion 320 as a pressure contact member instead of the cam mechanism 112 provided in the recess 111 of the connector lower portion 110. This is different from the fastening structure 100 of the first embodiment in that a spring member 322 formed by extending a part and processing it in a spiral shape is used.

  As shown in FIG. 3B, the spring member 322 is formed so as to have substantially the same height as the depth of the recess 111 in the initial state. As the connector upper part 320 is inserted, the connector upper part 120 is compressed downward.

  Finally, the spring member 322 is deformed so as to be reduced to the size of the gap between the convex portion 121 and the concave portion 111 as shown in FIG. In this state, the shape of the spring member 322 is adjusted so that the direction of the load is only the direction in which the bus bars 130a and 130b are pushed. For this reason, application of a high contact pressure to the bus bars 130a and 130b can be expected. Further, it is possible to absorb vibrations caused by disturbance due to the spring characteristics of the spring member and to always keep a high contact pressure against the bus bar.

  Furthermore, according to such a fastening structure 300, when the connector lower portion 310 and the connector upper portion 320 are fitted, the spring member is disposed in the gap formed by the concave portion 111 of the connector lower portion 310 and the convex portion 121 of the connector upper portion 320. By 322, a contact pressure is maintained between the bus bars 130a and 130b. For this reason, since it is not necessary to deform any member in order to fasten bus bars 130a and 130b, firm fastening can be performed regardless of the shape of the fastened member. Thus, if the bus bars 130a and 130b are firmly fastened, the contact resistance between them can be kept low and the connection reliability can be improved. Further, since the spring member 322 is configured to generate a contact pressure as the convex portion 121 of the connector upper portion 320 is inserted into the concave portion 111 of the connector lower portion 310, the connector lower portion 310 and the connector upper portion 320 are Since there is no contact pressure between them, the fastening operation can be easily performed.

  In addition, with such a structure, high contact pressure and vibration resistance are ensured only by inserting in one direction (downward in FIG. 3), and highly reliable electrical joining is realized.

  Further, by using the bus bar itself as the pressure contact member, the number of structural parts can be reduced and the cost can be reduced.

  For example, as shown in FIG. 4, the fastening structures 100, 200, and 300 have connector lower portions 110, 210, and 310 and connector upper portions 120 and 320 fixed to another structure 400 such as a case. As described above, a structure such as a case having a presser 510 or the like in the joining direction is set on another structure 500 such as a case, and the joining is completed simultaneously with the case assembly by the bolt 410. With this configuration, it is possible to reduce the number of fixing members alone, and it is possible to expect highly reliable fixing with a highly rigid member such as a case.

  100,200,300 ... fastening structure 110,210,310 ... lower connector (first fastened member), 111 ... concave, 112 ... cam mechanism (contacting member), 120,320 ... upper connector (second fastened member) Fastening member), 121... Convex portion, 212, 322... Spring member (pressure contact member).

Claims (7)

In a fastening structure comprising a first member to be fastened having a recess and a second member to be fastened having a protrusion inserted into the recess,
When the convex portion of the second fastened member is inserted into the concave portion of the first fastened member and the both are fitted, the concave portion and the convex portion are disposed in the gap, and the first fastened member and A pressure contact member for maintaining a contact pressure with the second fastened member;
The fastening structure, wherein the contact pressure member is configured to generate the contact pressure as the convex portion of the second fastened member is inserted into the concave portion of the first fastened member. body.   The fastening structure according to claim 1, wherein the pressure contact member is a cam mechanism that is rotatable when inserted.   The fastening structure according to claim 1, wherein the pressure contact member is a permanent deformation member that is permanently deformed at the time of insertion.   The fastening structure according to claim 3, wherein the permanent deformation member is a bus bar.   The fastening structure according to claim 1, wherein the pressure contact member is an elastically deformable member that is elastically deformed when inserted.   The fastening structure according to claim 5, wherein the elastic deformation member is a bus bar. A fastening method for a fastening structure comprising: a first fastened member having a concave portion; and a second fastened member having a convex portion inserted into the concave portion,
Inserting the convex portion of the second fastened member into the concave portion of the first fastened member;
A step of generating a contact pressure between the first member to be fastened and the second member to be fastened by a contact pressure member disposed in a gap formed by the concave portion and the convex portion as the convex portion is inserted. When,
Holding the contact pressure between the first fastened member and the second fastened member by the contact pressure member when the first fastened member and the second fastened member are fitted;
The fastening method of the fastening structure characterized by including.

Images