Manufacturing method for 1-pole terminal block

Abstract

To provide a technique capable of manufacturing plural types of one pole terminal blocks by sharing a metal mold.SOLUTION: A one pole terminal block 1A comprises: a one pole terminal 2 in which a first connection part 21 is formed to one end side, and a second connection part 22 is formed to the other end side; one collar 3; and a resin part 4 that holds the terminal 2 and the collar 3. The one pole terminal block 1A is manufactured by the following method that, in the first, only the second connection part 22 is formed ot a cavity of a metal mold unit for molding a resin part 4, and the first connection part 21 sets an unformed metal rod material and the collar 3. Sequentially, by filling a molten resin to the cavity to mold the resin part 4, and a molding product, that is, a semifinished product is fetched out by opening the metal mold. Then by executing cutting processing (cutting one end side of a rod material to a half-circular column shape, and a bolt insertion hole 23 is formed) to the rod material of the semifinished product, the first connection part 21 is molded. By the mentioned order, the one pole terminal block 1A is manufactured.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a terminal block. [Background technology]

[0002] Terminal blocks for connecting wires have various structures, one example of which is shown in Fig. 8 (see Patent Document 1). Terminal block 500 shown in Fig. 8 is fixed to the housing of a traction motor mounted on an automobile, and includes three bus bars 502, two collars 503, and housing 504 that holds them.

[0003] Each bus bar 502 includes a first connection portion 521 and a second connection portion 522. The first connection portion 521 is connected to, for example, a terminal of a traction motor. The second connection portion 522 is connected to, for example, a terminal of an inverter.

[0004] Collar 503 is made of metal and is formed in a cylindrical shape. A bolt for fixing terminal block 500 to the housing of the traction motor is passed through collar 503.

[0005] Housing 504 is made of insulating synthetic resin. Housing 504 is formed by filling a cavity of a mold with molten resin and solidifying the molten resin. Bus bar 502 and collar 503 are set in the cavity of the mold when housing 504 is molded, and are insert-molded into housing 504.

[0006] In addition to the terminal block 500, there are terminal blocks of various shapes to suit the mounting conditions of each vehicle. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2022-52013 Summary of the Invention [Problem to be solved by the invention]

[0008] In order to manufacture the various shapes of terminal blocks described above, it is necessary to create a mold for each product, which poses the problem of increased development time and costs.

[0009] Therefore, an object of the present invention is to provide a technique for manufacturing a plurality of types of single-pole terminal blocks by using a common mold. [Means for solving the problem]

[0010] The present invention is a method for manufacturing a one-pole terminal block including a terminal having a first connection portion formed on one end side and a second connection portion formed on the other end side, and a resin portion that holds the terminal, wherein the method comprises: cylindrical A metal rod is set, and the cavity is filled with molten resin to form the resin portion. After the resin portion is formed, the rod is cutting The first connecting portion or the second connecting portion is formed by processing. [Effects of the Invention]

[0011] According to the present invention, a plurality of types of single-pole terminal blocks can be manufactured using a common mold. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view showing an example of a one-pole terminal block manufactured by a manufacturing method according to one embodiment of the present invention. [Figure 2] 2 is a perspective view of the single-pole terminal block of FIG. 1 as seen from a different angle. [Figure 3] FIG. 10 is a perspective view showing another example of a one-pole terminal block manufactured by a manufacturing method according to one embodiment of the present invention. [Figure 4] FIG. 10 is a perspective view showing yet another example of a one-pole terminal block manufactured by a manufacturing method according to one embodiment of the present invention. [Figure 5]FIG. 5 is a perspective view showing a semi-finished product in the middle of manufacturing the single-pole terminal block of FIGS. [Figure 6] 1A and 1B are diagrams showing a terminal block assembly structure in which a one-pole terminal block manufactured by a manufacturing method according to one embodiment of the present invention is attached to an attachment portion, where (a) is a rear view and (b) is a plan view. [Figure 7] 10A and 10B are diagrams showing another terminal block assembly structure in which a one-pole terminal block manufactured by a manufacturing method according to one embodiment of the present invention is attached to an attachment portion, where (a) is a rear view and (b) is a plan view. [Figure 8] FIG. 10 is a perspective view showing a conventional terminal block. DETAILED DESCRIPTION OF THE INVENTION

[0013] A "manufacturing method for a single-pole terminal block" according to one embodiment of the present invention will be described with reference to FIGS.

[0014] 1 and 2, a single-pole terminal block 1A is a component used to connect wires together. This single-pole terminal block 1A includes a single-pole terminal 2 having a first connection portion 21 formed on one end and a second connection portion 22 formed on the other end, a collar 3, and a resin portion 4 that holds the terminal 2 and the collar 3.

[0015] The first connecting portion 21 is formed in a semi-cylindrical shape obtained by dividing a cylinder into two by a plane passing through the center axis of the cylinder, and is provided with a bolt insertion hole 23 .

[0016] The second connecting portion 22 is formed in a cylindrical shape and has a female thread portion 24. The female thread portion 24 is composed of a hole recessed from the other end of the terminal 2 and a spiral thread cut on the inner circumferential surface of the hole.

[0017] The collar 3 is made of metal and is formed in a cylindrical shape. A bolt is passed through the collar 3 to fix the single-pole terminal block 1A to the mounting portion.

[0018] The resin part 4 is molded in a mold unit, is made of insulating synthetic resin, and includes a cylindrical terminal holding part 42 and a plate-like collar holding part 43 connected to the outer peripheral surface of the terminal holding part 42. The outer peripheral surface of the terminal holding part 42 is formed with an annular packing mounting groove 44 for mounting an annular packing.

[0019] The terminal 2 is insert-molded into the resin part 4, with the first connection part 21 protruding from one end face of the terminal holding part 42, the second connection part 22 protruding from the other end face of the terminal holding part 42, and the central part being embedded in the terminal holding part 42.

[0020] The collar 3 is insert-molded into the resin part 4. The outer peripheral surface of the collar 3 is covered with a collar holding part 43. The central axis of the collar 3 is parallel to the central axis of the second connecting part 22.

[0021] The single-pole terminal block 1A is manufactured by the following method. First, a metal bar having only the second connecting portion 22 formed therein and not the first connecting portion 21, and the collar 3 are set in the cavity of a mold unit for molding the resin portion 4. Next, molten resin is filled into the cavity to mold the resin portion 4, and the mold is opened to remove the molded product shown in FIG. 5, i.e., the semi-finished product 1. Reference numeral 2Z denotes the metal bar having only the second connecting portion 22 formed therein and not the first connecting portion 21 formed therein. Then, the bar 2Z of the semi-finished product 1 is cut (one end of the bar 2Z is cut into a semi-cylindrical shape to form a bolt insertion hole 23) to form the first connecting portion 21. This is how the single-pole terminal block 1A is manufactured.

[0022] In the manufacturing process described above, by changing the cutting process performed on the bar material 2Z of the semi-finished product 1, it is possible to manufacture a one-pole terminal block 1B shown in FIG. 3 or a one-pole terminal block 1C shown in FIG. 4, etc.

[0023] The single-pole terminal block 1B differs from the single-pole terminal block 1A in the orientation of the first connection portion 21 relative to the collar 3, that is, the orientation of the bolt insertion hole 23, but otherwise has the same configuration as the single-pole terminal block 1A.

[0024] Terminal 102 of single-pole terminal block 1C has first connection portion 121 that is longer than first connection portion 21 of terminal 2 of single-pole terminal block 1A. That is, single-pole terminal block 1C has a different position of bolt insertion hole 23 from single-pole terminal block 1A, but otherwise has the same configuration as single-pole terminal block 1A.

[0025] In this way, in this example, a plurality of types of single-pole terminal blocks 1A, 1B, and 1C can be manufactured by sharing the same mold unit.

[0026] The single-pole terminal block obtained by the above-described manufacturing method is attached to a mounting portion as shown in, for example, FIGS.

[0027] The terminal block assembly structure 7 shown in Figures 6(a) and 6(b) has three 1-pole terminal blocks 1A, 1D, and 1E with different specifications attached to an attachment portion 8. The 1-pole terminal blocks 1A, 1D, and 1E use the same collar 3, and have the same configuration except that the orientation of the bolt insertion hole 23 relative to the collar 3 is different. All of these are manufactured using the same mold.

[0028] Mounting portion 8 is the housing of an inverter mounted on an automobile. Mounting portion 8 is formed with three insertion holes 82 through which terminal holding portions 42 of single-pole terminal blocks 1A, 1D, and 1E are inserted, and three bolt insertion holes 83 through which bolts that have passed through collars 3 of single-pole terminal blocks 1A, 1D, and 1E are passed.

[0029] Each of the single-pole terminal blocks 1A, 1D, and 1E is inserted into the corresponding insertion hole 82, a bolt is inserted into each collar 3 and each bolt insertion hole 83, and a nut is screwed onto the bolt, thereby fixing each of the single-pole terminal blocks 1A, 1D, and 1E to the mounting portion 8. In addition, the space between the insertion hole 82 and the terminal holding portion 42 is sealed by a packing attached to the packing mounting groove 44 of each of the single-pole terminal blocks 1A, 1D, and 1E.

[0030] 6(b), the first connection portions 21 of the single-pole terminal blocks 1A, 1D, 1E are positioned on one side of the mounting portion 8, i.e., inside the housing. These first connection portions 21 are overlapped with the terminals of the inverter and are fastened together by a bolt inserted into the bolt insertion hole 23 and a nut threaded onto the bolt.

[0031] As shown in Fig. 6(b), the second connection portions 22 of the single-pole terminal blocks 1A, 1D, and 1E are positioned on the other side of the mounting portion 8, i.e., on the outside of the housing. Round terminals connected to the ends of electric wires are placed over these second connection portions 22, and the second connection portions 22 are fastened together with the round terminals by bolts threaded into the female thread portions 24.

[0032] Such a terminal block assembly structure 7 uses unconnected single-pole terminal blocks 1A, 1D, and 1E, and can therefore flexibly accommodate changes in the position of the bolt insertion hole 83 in the mounting portion 8, changes in the pitch between the terminals 2, changes in the number of poles of the terminals 2, etc.

[0033] 7(a) and 7(b) shows a terminal block assembly structure 107 in which four 1-pole terminal blocks 1D of the same configuration are attached to an attachment portion 108. Like the terminal block assembly structure 7, this terminal block assembly structure 107 uses unconnected 1-pole terminal blocks 1D, and therefore can flexibly accommodate changes in the position of the bolt insertion holes in the attachment portion 108, changes in the pitch between the terminals 2, changes in the number of poles of the terminals 2, etc.

[0034] In the above-described embodiment, the metal bar 2Z, on which only the second connection portion 22 is formed but the first connection portion 21 is not formed, is set in the cavity of the mold unit for molding the resin portion 4. Alternatively, in the present invention, a metal bar on which only the first connection portion is formed but the second connection portion is not formed may be insert-molded into the resin portion, and the second connection portion may be formed after molding the resin portion. Also, a metal bar on which the first and second connection portions are not formed may be insert-molded into the resin portion, and the first and second connection portions may be formed after molding the resin portion.

[0035] The above-described embodiment merely shows a typical form of the present invention, and the present invention is not limited to this embodiment. In other words, the present invention can be implemented with various modifications within the scope of the gist of the present invention. As long as such modifications still include the configuration of the present invention, they are of course included in the scope of the present invention. [Explanation of symbols]

[0036] 1A,1B,1C,1D,1E 1 pole terminal block 2,102 terminals 3 colors 4 Resin part 21,121 First connection part 22 Second connection part

Claims

1. A method for manufacturing a one-pole terminal block including a terminal having a first connection portion formed on one end side and a second connection portion formed on the other end side, and a resin portion that holds the terminal, a cylindrical metal rod material before the first connection portion or the second connection portion is formed is set in a cavity of a mold unit for molding the resin portion, and molten resin is filled into the cavity to mold the resin portion; After the resin portion is molded, the rod material is subjected to a cutting process to mold the first connecting portion or the second connecting portion. A method for manufacturing a one-pole terminal block.

2. the first connection portion has a bolt insertion hole, After the resin portion is molded, the rod material is subjected to cutting to form the bolt insertion holes.

2. The method for manufacturing a one-pole terminal block according to claim 1.

3. the one-pole terminal block includes a cylindrical collar held by the resin portion, With the rod and the collar set in the cavity, the cavity is filled with molten resin to form the resin portion.

2. The method for manufacturing a one-pole terminal block according to claim 1.

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