terminal block

Abstract

A terminal block configured to electrically relay an inside and an outside of a partition wall of a sealed liquid. The terminal block includes a housing provided to penetrate the partition wall, a bus bar inserted into the housing, a seal mounted to the housing to seal a gap between the bus bar and the housing, and a bracket assembled to the housing outside the partition wall relative to the seal to prevent the seal from falling off. The bus bar extends through an inside and an outside of the partition wall of a first through-hole of the housing, a sealing hole of the seal, and a second through-hole of the bracket. Durability of a material constituting the housing to the liquid is superior to durability of a material constituting the bracket to the liquid.

Description

Technical Field

[0001] This invention relates to a terminal block that electrically relays the inside and outside of a partition containing a sealed liquid. Background Technology

[0002] In the prior art, a terminal block has been proposed that is mounted on the housing or the like of a device in a vehicle. For example, one type of terminal block in the prior art includes a housing assembled to the outer wall (partition) of a device that houses a motor or the like, a busbar inserted into the housing, and a seal that seals the gap between the housing and the busbar, and provides electrical relay between the inside and outside of the outer wall of the device while preventing leakage of oil or the like sealed in the device.

[0003] Citation List

[0004] Patent documents

[0005] Patent Document 1: JP-2019-071271-A Summary of the Invention

[0006] In the terminal blocks of the above type, the shell exposed to oil or the like is generally made of a material with excellent durability to oil or the like (e.g., polyamide resin), thereby suppressing corrosion, deformation, etc., caused by oil or the like sealed inside the device. However, since resins with excellent durability to oil or the like are generally expensive, the use of such resins increases the manufacturing cost of the shell (and the manufacturing cost of the terminal block).

[0007] The purpose of this invention is to provide a terminal block that improves the durability of the terminal block to oils exposed therein while reducing manufacturing costs.

[0008] To achieve the above objectives, the terminal block according to the present invention has the following features.

[0009] A terminal block configured to electrically relay the interior and exterior of a partition containing a sealed liquid, the terminal block comprising:

[0010] A shell, which is configured to penetrate the partition wall;

[0011] The busbar is inserted into a first through-hole formed in the housing;

[0012] A seal, which is mounted on the housing to seal the gap between the busbar and the housing, and has a sealing hole into which the busbar is inserted; and

[0013] A bracket, which is assembled to the housing at a position relative to the seal outside the partition to prevent the seal from falling off, and has a second through hole therein into which the busbar is inserted.

[0014] The busbar extends through the first through hole, the sealing hole, and the second through hole, such that one end of the busbar is disposed inside the partition wall and the other end of the busbar is disposed outside the partition wall, and the material constituting the shell has better durability against the liquid than the material constituting the support.

[0015] According to the terminal block of the present invention, since the shell is configured to penetrate the partition (e.g., the outer wall of a device such as a motor), the shell exposed to the sealed liquid (e.g., oil or water) within the partition is made of a material with better liquid durability compared to the support. Since the support is assembled onto the shell at a location outside the partition relative to the seal, the support is not exposed to the liquid within the partition and does not necessarily need to have excellent liquid durability. The busbar extends through the interior and exterior of the partition, the sealing hole of the seal, and the second through hole of the support, through a first through-hole of the shell configured as described above. By selecting the materials constituting the shell and the support separately from the perspective of durability against the liquid inside the partition, the manufacturing cost of the terminal block can be reduced compared to the prior art where both the shell and the support are made of materials with excellent liquid durability. Therefore, the terminal block of this configuration reduces manufacturing costs while improving durability against the liquid exposed therein.

[0016] The durability of the shell and support against liquids can be assessed using liquid resistance test methods such as those defined in JISK 6258 or JISK 7114.

[0017] The present invention has been briefly described above. Furthermore, the details of the invention will be clarified by referring to the accompanying drawings and the following description of the modes for implementing the invention (hereinafter referred to as "embodiments"). Attached Figure Description

[0018] Figure 1 This is a perspective view of the terminal block according to this embodiment in a vertical cross-sectional view.

[0019] Figure 2 This is an exploded perspective view of the terminal block according to this embodiment in a vertical cross-sectional view.

[0020] Figure 3 It is a cross-sectional view taken along the vertical direction of the shell with the shell and support separated.

[0021] Figure 4 This is a cross-sectional view taken vertically along the shell with the terminals removed.

[0022] Figure 5 It is a cross-sectional view taken along the vertical direction of the terminal block. Detailed Implementation

[0023] <Example>

[0024] In the following description, examples of embodiments of the present invention will be given with reference to the accompanying drawings.

[0025] Figure 1 This is a perspective view of the terminal block according to this embodiment in a vertical cross-sectional view. Figure 2 This is an exploded perspective view of the terminal block according to this embodiment in a vertical cross-sectional view. Figure 3 It is a cross-sectional view taken along the vertical direction of the shell with the shell and support separated. Figure 4 This is a cross-sectional view taken vertically along the shell with the terminals removed. Figure 5 It is a cross-sectional view taken along the vertical direction of the terminal block.

[0026] like Figures 1 to 5 As shown, the terminal block 11 according to this embodiment includes a housing 13 and a plurality of terminals 15. The housing 13 includes a housing 17 and a bracket 19. The housing 17 and the bracket 19 are respectively formed of insulating resin. The bracket 19 is assembled to the upper part of the housing 17 to form the housing 13.

[0027] The upper side of the housing 17 is the fastening part 21, and the lower side of the housing 17 is the assembly part 23. The housing 17 has a flange part 25 protruding to the outer peripheral side, and a bolt through hole 27 is formed in the flange part 25.

[0028] In terminal block 11, the assembly portion 23 of housing 13 is fitted into mounting holes 2 formed in the partition (outer wall) 1 of a device such as a drive motor. Then, in this state, bolts (not shown) pass through bolt holes 27 in the flange portion 25 of housing 17 and are screwed into threaded holes (not shown) formed in the partition 1, thereby assembling terminal block 11 in contact with the mounting surface 1a of partition 1. Oil for lubrication and the like, which is incorporated within partition 1, is sealed inside partition 1 (see [link to product description]). Figure 5 ).

[0029] An annular seal 28 is mounted circumferentially on the housing 17 on the assembly portion 23 side. When the assembly portion 23 of the housing 13 is fitted into the mounting hole 2, the seal 28 seals the space between the assembly portion 23 and the inner circumferential surface of the mounting hole 2.

[0030] The housing 17 has a plurality of terminal through holes 31 extending from front to back through the housing 17. The housing 17 has a nut receiving recess 51 on the assembly part 23 side, which is rectangular in shape in plan view. One side of the nut receiving recess 51 is open. A nut 52, which is rectangular in plan view and has a screw hole 52a, is received from the side in the nut receiving recess 51. A countersunk hole 53 is formed at the bottom 51a of the nut receiving recess 51. A partition wall 34 is formed between the nut receiving recesses 51, and adjacent nut receiving recesses 51 are separated by the partition wall 34. The nut 52 can be integrally formed with the housing 17 by insert molding.

[0031] A sealing fitting hole 35 is formed in the housing 17 above the terminal through hole 31. The housing 17 has a sealing retaining recess 36 in which each sealing fitting hole 35 is open, and also has a fitting recess 37 above the sealing retaining recess 36. The sealing retaining recess 36 and the fitting recess 37 are formed along the width direction of the housing 17.

[0032] The seal 41 is fitted into the sealing retaining recess 36 from above. The seal 41 is formed of a soft resin material such as rubber and has a plurality of sealing holes 42. Additionally, the seal 41 has a plurality of sealing sleeve portions 43 protruding in the direction of fitting into the sealing retaining recess 36, and the sealing holes 42 are formed in the sealing sleeve portions 43. Edge portions 44 are formed on the outer periphery of the sealing sleeve portions 43. When the seal 41 is fitted into the sealing retaining recess 36 of the housing 17, each sealing sleeve portion 43 fits into a sealing fitting hole 35. Therefore, the edge portion 44 of each sealing sleeve portion 43 is in close contact with the inner peripheral surface of the sealing fitting hole portion 35, thereby sealing the sealing fitting hole portion 35. An engaging recess 45 is formed in the seal 41 above the sealing hole 42.

[0033] Multiple support walls 47 stand upright on the upper part of the housing 17. The support walls 47 are formed in pairs corresponding to the terminal through holes 31. The support walls 47 are arranged along the arrangement direction of the terminal through holes 31 and protrude to the upper side of the housing 17.

[0034] The bracket 19 includes a plurality of terminal holding portions 60. Partitions 61 are formed on both sides of the terminal holding portions 60, and the terminal holding portions 60 are separated by the partitions 61. Each terminal holding portion 60 is provided with a terminal insertion portion 63, an insertion window 65, and a nut receiving recess 67 in sequence.

[0035] The terminal insertion portion 63 includes a plurality of downwardly projecting engagement protrusions 71. A sealing retention protrusion 72 is formed on the engagement protrusions 71. A terminal insertion hole 73, extending from front to back through the bracket 19, is formed in the bracket 19 at the locations where the engagement protrusions 71 and the sealing retention protrusions 72 are formed. When the bracket 19 is assembled to the upper part of the housing 17, the engagement protrusions 71 are engaged with the engagement recesses 37 of the housing 17, and the sealing retention protrusions 72 are engaged with the engagement recesses 45 of the seal 41. Therefore, the seal 41 is pressed and fixed in the terminal through hole 31 by the bracket 19 assembled to the housing 17. That is, the bracket 19 prevents positional deviation of the seal 41 (i.e., prevents the seal 41 from falling off). In this state, the terminal insertion hole 73 of the bracket 19 communicates with the terminal through hole 31 of the housing 17 and the sealing hole 42 of the seal 41.

[0036] As long as the bracket 19 can prevent the seal 41 from falling off, the bracket 19 does not necessarily have to press against the seal 41. For example, the bracket 19 can be configured such that the bracket 19 and the seal 41 are adjacent to each other without any gap between them (so-called zero contact state), or it can be configured such that another component is sandwiched between the bracket 19 and the seal 41 and the seal 41 is pressed against that component, or it can be configured such that another component is sandwiched between the bracket 19 and the seal 41 and that component is in a zero contact state with the seal 41.

[0037] The insertion window 65 is formed by an opening extending from front to back through the insertion window 65 and is rectangular in shape in plan view. By assembling the bracket 19 to the upper part of the housing 17, each pair of support walls 47 formed on the housing 17 is inserted into the corresponding one of the insertion windows 65. The upper end of the support wall 47 inserted into the insertion window 65 protrudes slightly in the terminal holding portion 60 between the partition walls 61 of the bracket 19.

[0038] The nut receiving recess 67 is a recess with an opening on its upper side and is rectangular in plan view. A nut (fastener) 75, which is rectangular in shape and has a threaded hole 75a in plan view, is received from above in the nut receiving recess 67. The nut receiving recess 67 has an internal shape slightly larger than the external shape of the nut 75. A countersunk hole 68 is formed in the bottom 67a of the nut receiving recess 67. The nut 75 can be integrated with the bracket 19 by insert molding.

[0039] Terminal 15, mounted on housing 13, is formed of a conductive metal material such as copper or a copper alloy and is a plate-shaped busbar. Terminal 15 is bent near one end and is L-shaped in side view. With the bend as the boundary, one end of terminal 15 is a fastening plate portion 81, and the other end is a connecting plate portion 85. Fastening holes 82 are formed in fastening plate portion 82, and connecting holes 86 are formed in connecting plate portion 85.

[0040] With the fastening plate portion 81 facing the nut receiving recess 67 of the nut 75 that houses the bracket 19, the terminal 15 is mounted on the housing 13 by inserting the connecting plate portion 85 into the terminal insertion hole 73 and the terminal through hole 31 that communicate with each other.

[0041] Then, the connecting plate portion 85 of terminal 15 is inserted into the sealing hole 42 of the seal 41 between housing 17 and bracket 19. Therefore, the inner peripheral surface of the sealing hole 42 of seal 41 is in close contact with the outer peripheral surface of the connecting plate portion 85 of terminal 15, and the gap between the connecting plate portion 85 of terminal 15 and terminal through hole 31 is sealed.

[0042] When terminal 15 is mounted on housing 13, fastening plate portion 81 is positioned facing nut 75 accommodated in nut receiving recess 67, and end of connecting plate portion 85 is positioned facing nut 52 accommodated in nut receiving recess 51. Therefore, in terminal 15, fastening hole 82 of fastening plate portion 81 communicates with threaded hole 75a of nut 75, and connecting hole 86 of connecting plate portion 85 communicates with threaded hole 52a of nut 52.

[0043] Furthermore, the fastening plate portion 81 of the terminal 15 mounted on the housing 13 contacts the upper end of the support wall 47 of the housing 17. Therefore, a fastening surface 81a is positioned on the upper surface of the fastening plate portion 81 of the terminal 15.

[0044] In the above description, the seal 41, bracket 19, and terminal 15 are sequentially and individually assembled onto the housing 17. According to this assembly sequence, since the terminal 15 is guided into the sealing hole 42 of the seal 41 through the terminal insertion hole 73 of the bracket 19, it is possible to prevent the terminal 15 from accidentally contacting the engagement recess 45 of the seal 41 and damaging the seal 41. However, the assembly sequence of the seal 41, bracket 19, and terminal 15 on the housing 17 is not limited to this; for example, the seal 41 can be assembled onto the housing 17, the terminal 15 can be assembled onto the bracket 19, and the bracket 19 with the terminal 15 assembled can be assembled onto the housing 17 with the seal 41 assembled.

[0045] Next, the method for wiring terminal block 11 will be described.

[0046] In terminal block 11, a terminal fitting 91 disposed on the wiring material mounted to the device side of terminal block 11 is connected to the connecting plate portion 85 of terminal 15. A hole 92 is formed in the terminal fitting 91. To connect the terminal fitting 91 to the connecting plate portion 85 of terminal 15, a bolt 93 is inserted into the hole 92 formed in the terminal fitting 91, and the bolt 93 passes through the connecting hole 86 of the connecting plate portion 85 of terminal 15 and is screwed into the threaded hole 52a of the nut 52 received in the nut receiving recess 51. Therefore, the terminal fitting 91 is fixed and connected to the connecting plate portion 85 of terminal 15 by the bolt 93 and the nut 52. In this tightened state, the end of the bolt 93 passes through the countersunk hole 53 formed in the bottom 51a without interfering with the bottom 51a of the nut receiving recess 51.

[0047] Furthermore, in terminal block 11, a busbar 95, which is the wiring material on the device side and is the object of connection, is connected to the fastening plate portion 81 of terminal 15. The busbar 95 is a plate-shaped member formed of conductive metal material and has a hole 96 at its end. In order to connect the busbar 95 to the fastening plate portion 81 of terminal 15, a bolt 97 is inserted into the hole 96 formed in the busbar 95, the bolt 97 passes through the fastening hole 82 of the fastening plate portion 81 of terminal 15, and is screwed into the screw hole 75a of the nut 75 received in the nut receiving recess 67. Thus, the busbar 95 is fixed and connected to the fastening plate portion 81 of terminal 15 by the bolt 97 and the nut 75. In this tightened state, the end of the bolt 97 passes through the countersunk hole 68 formed in the bottom 67a without interfering with the bottom 67a of the nut receiving recess 67.

[0048] like Figure 5 As shown, with the terminal block 11 assembled to the partition 1, the housing 17 is configured to penetrate the mounting hole 2 in the partition 1. In the terminal 15, the end portion of the fastening plate portion 81 (fastening hole 82) is located outside the partition 1 (i.e., in the air), and the end portion of the connecting plate portion 85 (connecting hole 86) is located inside the partition 1 (i.e., in the oil). The bracket 19 has a shape that guides the end portion (fastening hole 82) of the fastening plate portion 81 of the terminal 15 to the busbar 95, and is assembled to the outside of the partition 1 (i.e., in the air) relative to the seal 41, thereby fixing the position of the seal 41.

[0049] With the terminal block 11 assembled into the partition 1, while the seal 41 sealing the gap between the terminal 15 and the housing 17 and the seal 28 sealing the gap between the partition 1 and the housing 17 prevent leakage of the oil sealed inside the partition 1, the terminal block 11 electrically relays the terminal fitting 91 located inside the partition 1 (i.e., in the oil) and the busbar 95 located outside the partition 1 (i.e., in the air).

[0050] As described above, since the housing 17 is configured to penetrate the mounting hole 2 in the partition 1, the housing 17 is exposed to the oil sealed inside the partition 1. On the other hand, since the bracket 19 is assembled to the housing 17 outside the partition 1 relative to the seal 41, the bracket 19 is not exposed to the oil. In view of these points, in the terminal block 11, the housing 17 is made of a material that has better oil resistance than the bracket 19. Generally speaking, materials with excellent oil resistance are more expensive than materials that do not have excellent oil resistance. Therefore, compared to the case where both the housing 17 and the bracket 19 are made of materials with excellent oil resistance, the manufacturing cost of the terminal block 11 can be reduced.

[0051] Examples of materials constituting the housing 17 (materials with excellent durability against oil) include polystyrene resin (SPS), polyphenylene sulfide resin (PPS), polyamide resin, compositions comprising polybutene resin and glass fiber, and compositions comprising polyamide resin and glass fiber. Generally, the durability of a material against oil is improved by mixing glass fiber with synthetic resin. However, when glass fiber is mixed with synthetic resin, the material tends to be less likely to undergo elastic deformation (i.e., less likely to bend). Considering these points, the glass fiber content in the material constituting the housing 17 (i.e., synthetic resin + glass fiber) is preferably 15–30 wt%. From another perspective, when the terminal block 11 is fitted into the partition 1 of a device such as a drive motor, it is necessary to increase the reaction force (retaining force) of the seal 28 to withstand the pressure difference between the inside and outside of the drive motor, and it is preferable to use a polyamide resin (or a composition comprising polyamide resin) with excellent strength to cope with the higher reaction force.

[0052] As the material constituting the support 19 (i.e., a material with lower oil resistance than the material constituting the housing 17), a material with a similar composition to the material constituting the housing 17 (i.e., synthetic resin + glass fiber) and a lower glass fiber content than the material constituting the housing 17 can be used.

[0053] <Functions and Effects>

[0054] As described above, in the terminal block 11 according to this embodiment, since the housing 17 is configured to penetrate the partition 1, the housing 17, which is exposed to the sealed oil inside the partition 1, is made of a material that has better oil resistance than the bracket 19. Since the bracket 19 is assembled to the housing 17 outside the partition 1 relative to the seal 41, the bracket 19 is not exposed to the oil, and the bracket does not need to have excellent oil resistance. Therefore, compared to a situation where both the housing 17 and the bracket 19 are made of materials with excellent oil resistance, the manufacturing cost of the terminal block 11 can be reduced. Therefore, the terminal block 11 according to this embodiment can reduce manufacturing costs while improving oil resistance.

[0055] Furthermore, the nut 75 is housed in the bracket 19, and the terminal 15 is fastened to the busbar 95 by a bolt 97 inserted into the nut 75. Therefore, the bracket 19 can also serve as a base for fastening the busbar 95 and the terminal 15, and compared to the case where the base is mounted on a separate component from the bracket 19 and the housing 17, the manufacturing cost of the terminal block 11 can be further reduced. Moreover, as described above, since the amount of resin used during manufacturing is increased by the amount corresponding to the nut-receiving recess 67, the bracket 19 is made of relatively inexpensive resin, thus reducing the manufacturing cost of the terminal block 11.

[0056] <Other Embodiments>

[0057] This invention is not limited to the above embodiments, and various modifications can be made within the scope of this invention. For example, this invention is not limited to the above embodiments, and can be appropriately modified and improved. Furthermore, as long as this invention can be implemented, the material, shape, size, quantity, arrangement, etc. of the components in the above embodiments are optional and not limited.

[0058] In the above embodiment, since the oil is sealed inside the partition 1 assembled to the terminal block 11, the housing 17 is made of a material that has better durability against oil than the bracket 19. On the other hand, when water is sealed inside the partition 1 assembled to the terminal block 11, the housing 17 can be made of a material that has better water durability than the bracket 19.

[0059] Here, the features of the above-described embodiment of the terminal block 11 according to the present invention will be briefly summarized and listed in the following [1] to [3]. [1]

[0061] A terminal block (11) configured to electrically relay the inside and outside of a partition (1) containing a sealed liquid, the terminal block (11) comprising:

[0062] Shell (17), which is configured to penetrate the partition (1);

[0063] The busbar (15) is inserted into the first through hole (31) of the housing (17);

[0064] A seal (41), which is mounted on the housing (17) to seal the gap between the busbar (15) and the housing (17), and has a sealing hole (42) therein into which the busbar (15) is inserted; and

[0065] A bracket (19), which is assembled to the housing (17) at a position relative to the seal (41) outside the partition (1) to prevent the seal (41) from falling off, and has a second through hole (terminal insertion hole 73) into which the busbar (15) is inserted, wherein

[0066] The busbar (15) extends through the first through hole (31), the sealing hole (42), and the second through hole (terminal insertion hole 73), such that one end of the busbar (15) is disposed inside the partition wall (1) and the other end of the busbar (15) is disposed outside the partition wall (1).

[0067] The material constituting the shell (17) has better durability against the liquid than the material constituting the support (19).

[0068] According to the terminal block having the above-described [1] structure, since the shell is configured to penetrate the partition (e.g., the outer wall of the device), the shell exposed to the liquid sealed in the partition (e.g., oil or water) is made of a material with better liquid durability than the support. Since the support is assembled to the shell outside the partition relative to the seal, the support is not exposed to the liquid in the partition and does not need to have excellent liquid durability. By selecting materials that constitute the shell and materials that constitute the support, which are separate from each other in terms of liquid durability, the manufacturing cost of the terminal block can be reduced compared to the case in the prior art where both the shell and the support are made of materials with excellent liquid durability. Therefore, the terminal block of this structure can reduce manufacturing costs while improving the durability of the liquid exposed to the terminal block. [2]

[0070] In the terminal block (11) according to [1] above, the bracket (19) includes a nut receiving portion (67) and a nut (75) received in the nut receiving portion (67), and

[0071] The busbar (15) includes a fastening hole (82) configured to align with the nut (75), and is electrically connected to the external terminal (95) by means of a bolt (97) inserted into the fastening hole (82) and fastened to the nut (75).

[0072] According to the terminal block having the structure described above [2], the nut is housed in the nut receiving portion of the bracket, and the busbar is fastened to the external terminal by bolts fastened to the nut. Therefore, the bracket can also serve as a base for fastening the external terminal and the busbar, and compared to the case where the base is set on a component separate from the bracket and the housing, the manufacturing cost of the terminal block can be further reduced. In addition, as described above, since the amount of resin used during manufacturing is increased by the amount corresponding to the nut receiving portion, the bracket is made of relatively inexpensive resin, thus reducing the manufacturing cost of the terminal block. [3]

[0074] In the terminal block (11) according to [1] or [2] above, the liquid sealed in the partition wall (1) is oil, and

[0075] The shell (17) is made of polyamide resin.

[0076] According to the terminal block having the structure described above [3], the shell is made of polyamide resin. Polyamide resin is particularly excellent in terms of oil resistance. Therefore, the oil resistance of the shell can be improved.

[0077] Furthermore, embodiments of the terminal block 11 according to the present invention also have the following features.

[0078] A method for manufacturing a terminal block (11), said terminal block (11) being configured to electrically relay the inside and outside of a partition (1) containing a sealed liquid, wherein said terminal block (11) comprises:

[0079] A housing (17) configured to penetrate the partition wall (1); a busbar (15) having one end disposed inside the partition wall (1) and the other end disposed outside the partition wall (1); a seal (41) configured to seal the gap between the busbar (15) and the housing (17); and a bracket (19) configured to prevent the seal (41) from falling off.

[0080] The material constituting the shell (17) has better durability against the liquid than the material constituting the support (19).

[0081] The manufacturing method includes performing the following sequentially:

[0082] The seal (41) is installed on the housing (17) such that the first through hole (31) of the housing (17) communicates with the sealing hole (42) of the seal (41);

[0083] Assemble the bracket (19) onto the housing (17) at a position relative to the seal (41) outside the partition wall (1), such that the sealing hole (42) communicates with the second through hole (73) of the bracket (19); and

[0084] The busbar (15) is inserted sequentially into the second through hole (73), the sealing hole (42), and the first through hole (31).

[0085] According to the manufacturing method of the terminal block having the above structure, since the busbar enters the sealing hole of the seal while being guided by the second insertion hole of the bracket, it is possible to prevent the busbar from accidentally contacting parts other than the sealing hole of the seal and damaging the seal. By selecting the materials constituting the shell and the bracket, which are separate from each other, from the perspective of their durability against liquids, the manufacturing cost of the terminal block can be reduced.

Claims

1. A terminal block configured to electrically relay the interior and exterior of a partition containing a sealed liquid, the terminal block comprising: A shell, which is configured to penetrate the partition wall by fitting into a mounting hole formed in the partition wall; The busbar is inserted into a first through-hole formed in the housing; A sealing element, which is mounted on the housing to seal the gap between the busbar and the housing, and has a sealing hole therein into which the busbar is inserted; as well as A bracket, which is assembled to the housing at a position relative to the seal outside the partition to prevent the seal from falling off, and has a second through hole therein into which the busbar is inserted. The busbar extends through the first through hole, the sealing hole, and the second through hole, such that one end of the busbar is disposed inside the partition wall and the other end of the busbar is disposed outside the partition wall. The material constituting the shell has better durability against the liquid than the material constituting the support. The sealing and retaining protrusion, which is located at the inner end of the bracket in the inward and outward direction and protrudes towards the inner side of the inward and outward direction, engages with the engaging recess, which is located at the outer end of the seal in the inward and outward direction and recesses towards the inner side of the inward and outward direction. With the shell fitted into the mounting hole, the distal end face of the sealing retaining protrusion of the bracket is located inside the outer opening in the inward-outward direction of the mounting hole.

2. The terminal block according to claim 1, in, The bracket includes a nut receiving portion and a nut received in the nut receiving portion, and The busbar includes a fastening hole aligned with the nut, and is electrically connected to the external terminal by means of a bolt inserted into the fastening hole and fastened to the nut.

3. The terminal block according to claim 1 or 2, in, The liquid sealed within the partition is an oil, and The shell is made of polyamide resin.

4. A method for manufacturing a terminal block, said terminal block being configured to electrically relay the interior and exterior of a partition containing a sealed liquid. The terminal block includes: A shell, which is configured to penetrate the partition wall by fitting into a mounting hole formed in the partition wall; A busbar, one end of which is located inside the partition wall and the other end of which is located outside the partition wall; A seal, configured to seal the gap between the busbar and the housing, and A bracket, configured to prevent the seal from falling off, and The material constituting the shell has better durability against the liquid than the material constituting the support. The sealing and retaining protrusion, which is located at the inner end of the bracket in the inward and outward direction and protrudes towards the inner side of the inward and outward direction, engages with the engaging recess, which is located at the outer end of the seal in the inward and outward direction and recesses towards the inner side of the inward and outward direction. With the shell fitted into the mounting hole, the distal end face of the sealing retaining protrusion of the bracket is located inside the outer opening in the inward-outward direction of the mounting hole; The manufacturing method includes: The seal is installed onto the housing such that a first through hole formed in the housing communicates with a sealing hole formed in the seal; Assemble the bracket onto the housing at a position relative to the seal outside the partition wall, such that the sealing hole communicates with the second through hole of the bracket; and The busbar is inserted sequentially into the second through hole, the sealing hole, and the first through hole.

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