Bus bar
By setting reinforcement ribs at the base of the bus bar and absorbing vibrations with relay terminal accessories, the abnormal noise problem caused by vibration propagation in the bus bar is solved, and higher stability and lower abnormal noise generation are achieved.
Patent Information
- Application Number
- CN202411306480.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-21
- Filing Date
- 2024-09-19
- Publication Date
- 2025-03-21
AI Technical Summary
In the bus bar, vibration caused by the driving of the relay component will propagate to the terminal connection part, resulting in abnormal noise. Especially when the bus bar is contained in the frame of the electrical connection box, since the accommodation method allows for a clearance, vibration is more likely to cause abnormal noise.
Reinforcement ribs are provided at the base of the bus bar to improve their rigidity, thereby suppressing the propagation of vibrations driven by the relay component to the base of the bus bar. At the same time, vibration is absorbed and attenuated by the relay terminal accessories, and the generation of abnormal noise is further reduced.
By providing reinforcement ribs, the bus bar can effectively suppress the propagation of vibrations, reduce the generation of abnormal noises caused by its own vibrations, and can effectively suppress abnormal noises when the vibrations are amplified.
Smart Images
Figure CN119674585A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to bus bars. Background Art
[0002] The bus bar is housed in a frame of an electrical connection box such as a junction box, and electrically connects at least two electrically connected components. The bus bar is, for example, a plate-shaped conductive component obtained by stamping a metal plate as a base material, and has a terminal connection portion formed in a male tab shape that is directly or indirectly connected to the electrically connected component. Such a bus bar is disclosed in the following patent document 1.
[0003] Prior art literature
[0004] Patent Literature
[0005] Patent Document 1: Japanese Patent Application Publication No. 2010-259228 Summary of the invention
[0006] Technical problem that the invention aims to solve
[0007] However, in the busbar, when the electrically connected object component is a relay component that can become an excitation source, the vibration generated by the drive of the relay component will be transmitted to the terminal connection part, and the vibration will be propagated from the terminal connection part as the starting point. In addition, the busbar is accommodated in a manner that allows some clearance (looseness) in the frame of the electrical connection box, so it is possible to generate abnormal noise caused by the vibration of the busbar. In addition, the busbar is sometimes electrically connected to the relay component via a relay terminal accessory. In this case, the male tab-shaped terminal connection part of the busbar is indirectly connected to the male tab-shaped terminal connection part of the relay component through the relay terminal accessory. Here, in the busbar, when the relay terminal accessory uses elastic force to physically and electrically connect the terminal connection part, it is sufficient to absorb and attenuate the vibration generated by the drive of the relay component through the relay terminal accessory, but the vibration may also be amplified by the relay terminal accessory and transmitted to the terminal connection part.
[0008] Therefore, an object of the present invention is to provide a bus bar capable of suppressing the propagation of vibration.
[0009] Technical solutions to the problem
[0010] The present invention is characterized in that it has: a flat busbar base; and a busbar terminal connecting portion in the shape of a male tab, the busbar terminal connecting portion being erected from the busbar base, the busbar terminal connecting portion being electrically connected to the relay terminal connecting portion of the relay component via a relay terminal accessory, a reinforcing rib being provided on the busbar base, the reinforcing rib protruding from the plane at least at one position on the plane of the busbar base, thereby suppressing shape deformation caused by vibration transmitted to the busbar terminal connecting portion accompanied by the driving of the relay component.
[0011] Effects of the Invention
[0012] The busbar involved in the present invention improves rigidity by providing reinforcing ribs at the base of the busbar, and can suppress the vibration generated by the drive of the relay component from propagating to the base of the busbar. Therefore, the busbar can suppress the generation of abnormal noise caused by its own vibration. In addition, in the busbar, when the vibration generated by the drive of the relay component is absorbed and attenuated by the relay terminal accessories, the propagation of the vibration to the base of the busbar can be further suppressed, so the generation of abnormal noise caused by its own vibration can be further suppressed. On the other hand, in the busbar, even if the vibration generated by the drive of the relay component is amplified by the relay terminal accessories, the generation of abnormal noise caused by its own vibration can still be suppressed by providing reinforcing ribs at appropriate positions. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is an exploded perspective view for explaining an electric junction box provided with a bus bar according to an embodiment.
[0014] Figure 2 This is a perspective view for explaining an electric connection box provided with a bus bar according to an embodiment.
[0015] Figure 3 It is a plan view showing the bus bar and the relay terminal fittings of the embodiment accommodated in the bus bar accommodating chamber.
[0016] Figure 4 is Figure 2 A cross-sectional view showing the periphery of the relay terminal fitting extracted from the XX line cross section.
[0017] Figure 5 This is a diagram showing an example of simulation analysis results of the equivalent radiation power level related to the bus bar according to the embodiment.
[0018] Figure 6 This is a diagram showing another example of the simulation analysis result of the equivalent radiation power level related to the bus bar according to the embodiment.
[0019] Figure 7It is a plan view showing an example of the bus bar according to the embodiment.
[0020] Figure 8 It is a plan view showing another example of the bus bar according to the embodiment.
[0021] Fig. 9 It is a plan view showing another example of the bus bar according to the embodiment.
[0022] Description of Reference Numerals
[0023] 1. A, 1B, 1C busbars
[0024] 10 Bus bar base
[0025] 11, 11A, 11B, 11C reinforcement ribs
[0026] 20A busbar terminal connection
[0027] 550 Relay Parts
[0028] 552 Relay terminal connection
[0029] 570 Relay Terminal Accessories DETAILED DESCRIPTION
[0030] Hereinafter, an embodiment of the bus bar of the present invention will be described in detail based on the drawings. However, the present invention is not limited to this embodiment.
[0031] [Implementation Method]
[0032] based on Figures 1 to 9 One embodiment of the bus bar of the present invention will be described.
[0033] Figure 1 The reference numeral 1 shown in the figure indicates a bus bar of the present embodiment. The bus bar 1 is housed in a frame of an electrical connection box 500 such as a junction box, and electrically connects at least two electrically connected components ( Figures 1 to 3 The bus bar 1 shown here electrically connects the relay component 550 as an electrically connected component to other electrically connected components ( Figure 1 and Figure 2 ).
[0034] The bus bar 1 is a conductive component formed in a plate shape from a conductive material such as a metal material. For example, the bus bar 1 is formed by stamping using a metal plate as a base material. The bus bar 1 has a flat plate-shaped base (hereinafter referred to as the "bus bar base") 10 and a male tab-shaped terminal connection portion (hereinafter referred to as the "bus bar terminal connection portion") 20 ( Figure 1 and Figure 3The bus bar 1 shown here has a plurality of bus bar terminal connection portions 20, and the relay component 550 is electrically connected to one of the plurality of bus bar terminal connection portions 20 (hereinafter referred to as "bus bar terminal connection portion 20A") via a relay terminal fitting 570. Figure 1 , Figure 3 and Figure 4 ).
[0035] Here, the relay component 550 includes a relay body 551 and a terminal connection portion (hereinafter referred to as a “relay terminal connection portion”) 552 protruding from the relay body 551. Figure 1 ). The relay component 550 shown here is provided with a relay terminal connection portion 552 formed in a male tab shape.
[0036] In addition, the relay terminal fitting 570 has an electrical connection portion 571 in the tube of the cylindrical terminal body 572, and the electrical connection portion 571 is physically and electrically connected to the busbar terminal connection portion 20A and physically and electrically connected to the relay terminal connection portion 552 ( Figure 4 ). Therefore, the busbar terminal connection portion 20A is electrically connected to the relay terminal connection portion 552 via the relay terminal fitting 570. The relay terminal fitting 570 shown here is formed by press-molding using a metal plate as a base material.
[0037] The electrical connection portion 571 is bent and deformed as the busbar terminal connection portion 20A is inserted, so that its reaction force (elastic force) acts on the plane of the busbar terminal connection portion 20A, and the busbar terminal connection portion 20A is clamped between the electrical connection portion 571 and the inner wall surface of the terminal body 572 ( Figure 4 ). Therefore, the busbar terminal connection portion 20A is physically and electrically connected to the relay terminal fitting 570 by the elastic force of the relay terminal fitting 570 acting on its plane. In addition, the electrical connection portion 571 is flexed and deformed as the relay terminal connection portion 552 is inserted, so that its reaction force (elastic force) acts on the plane of the relay terminal connection portion 552, and the relay terminal connection portion 552 is clamped between the electrical connection portion 571 and the inner wall surface of the terminal body 572 ( Figure 4 ). Therefore, the relay terminal connection portion 552 is physically and electrically connected to the relay terminal fitting 570 by the elastic force of the relay terminal fitting 570 acting on its plane. However, here, the relay terminal connection portion 552 is clamped between the bulging portion 573 bulging from the inner wall surface of the terminal body 572 and the electrical connection portion 571. The electrical connection portion 571 shown here is formed into a U-shape clamped by the busbar terminal connection portion 20A and the relay terminal connection portion 552 in the tube of the terminal body 572, and a reaction force (elastic force) in opposite directions is applied to the busbar terminal connection portion 20A and the relay terminal connection portion 552.
[0038] The electrical connection box 500 includes a housing for accommodating the bus bar 1, the relay component 550, and the relay terminal fitting 570. The housing includes a case component 510 and a cover component 520 ( Figure 1 ).
[0039] The housing member 510 is formed with a housing chamber 511 (hereinafter referred to as a "bus bar housing chamber") for housing the bus bar 1. Figure 1 and Figure 3 ). The bus bar 1 is accommodated in the bus bar accommodation chamber 511 in a state where the relay terminal fittings 570 are assembled to the bus bar terminal connecting portion 20A. Therefore, the bus bar accommodation chamber 511 also accommodates the relay terminal fittings 570 .
[0040] The cover member 520 is assembled to the housing member 510 to cover the housing member 510 together with the bus bar 1. The cover member 520 shown here covers the relay terminal fitting 570 together with the bus bar 1. Therefore, the cover member 520 is formed with a through hole for inserting the relay terminal connecting portion 552 into the relay terminal fitting 570. In addition, in the cover member 520, a vertical wall surrounding the through hole is provided on the outer wall surface, and the space inside the vertical wall is used as a storage chamber (hereinafter referred to as a "relay storage chamber") 521 for the relay member 550. Figure 1 ).
[0041] In addition, a portion of the vertical wall of the cover member 520 is cut away, and a holding portion (hereinafter referred to as a "relay holding portion") 522 for holding the relay member 550 in the relay accommodating chamber 521 is provided in the cut away portion. Figure 1 The relay holding portion 522 constitutes a so-called locking mechanism that is hooked on a claw portion 553 protruding from the outer wall surface of the relay body 551 to hold the claw portion 553 ( Figure 1 ).
[0042] In this frame, a holding mechanism for holding the bus bar 1 in the bus bar storage chamber 511 (for example, a mechanism for holding the bus bar 1 in the bus bar storage chamber 511 by providing a through hole in the bus bar 1 and providing a claw inserted into the through hole on a vertical wall of the bus bar storage chamber 511 so that the claw is hooked on the periphery of the through hole) is not provided in the housing member 510. However, in this frame, the bus bar 1 is indirectly held relative to the cover member 520 via the relay member 550 held by the cover member 520 and the relay terminal fitting 570 to which the relay terminal connection portion 552 of the relay member 550 is fitted and connected.
[0043] However, in the relay component 550, vibration is generated due to its switching action of being turned on and off, and the vibration is transmitted to the relay terminal connection part 552. In addition, the vibration generated by the driving of the relay component 550 is transmitted from the relay terminal connection part 552 to the busbar terminal connection part 20A via the relay terminal fitting 570, and is transmitted from the busbar terminal connection part 20A to the busbar base 10. Since the busbar 1 is not fixed to the housing component 510, when the vibration of the relay component 550 is transmitted to the busbar base 10, it is possible that an abnormal sound is generated due to the vibration of the busbar base 10. In addition, even if the busbar 1 in the busbar storage chamber 511 is retained in the housing component 510 by the aforementioned retaining mechanism, since the retaining mechanism has a clearance (looseness) between the claw part and the through hole, the busbar 1 can be relatively moved in the busbar storage chamber 511 relative to the housing component 510 by an amount equivalent to the clearance. Therefore, even if the bus bar 1 is held by the housing member 510 by the holding mechanism, when the vibration of the relay member 550 is transmitted to the bus bar base 10 , there is a possibility that an abnormal sound is generated due to the vibration of the bus bar base 10 .
[0044] Therefore, in this embodiment, the bus bar 1 is formed as follows to suppress the generation of abnormal noise caused by the vibration generated by the driving of the relay component 550. The bus bar 1 of this embodiment is provided with a reinforcing rib 11 ( Figure 1 ), the reinforcing rib 11 is used to suppress the shape deformation caused by the vibration transmitted to the busbar terminal connection part 20A accompanied by the driving of the relay component 550, thereby suppressing the generation of abnormal noise caused by the vibration. The reinforcing rib 11 protrudes from the plane of the busbar base 10 at least at one point on the plane.
[0045] The configuration position of the reinforcing rib 11 is determined as follows. Here, the equivalent radiation power level ( Figure 5 and Figure 6). In the conventional busbar 1conv, there is no reinforcing rib 11 in the busbar base 10, and the relay component 550 is assembled in the busbar terminal connection portion 20A via the relay terminal fitting 570. The analysis result is that in the conventional busbar 1conv, vibration occurs near the busbar terminal connection portion 20A in the busbar base 10 (i.e., near the input portion of the vibration of the relay component 550 in the busbar base 10) and in the portion with low rigidity in the entire busbar base 10. Therefore, in the busbar 1 of the present embodiment, reinforcing ribs 11 are provided near the busbar terminal connection portion 20A in the busbar base 10 (i.e., near the input portion of the vibration of the relay component 550 in the busbar base 10) and in the portion with low rigidity in the entire busbar base 10. In this example, the reinforcing ribs 11 are provided at positions and in such numbers that the equivalent radiation power level at a specific frequency Fs (the frequency of vibration generated by driving the relay component 550 ) is reduced.
[0046] For example, Figure 7 The bus bar 1A having circular reinforcement ribs 11A is shown. In the bus bar 1A, the reinforcement ribs 11A are provided at four locations of the bus bar base 10, and the rigidity is improved at each location where the reinforcement ribs 11A are provided. Figure 5 The solid line indicates the equivalent radiation power level of the bus bar 1A. In the bus bar 1A, the equivalent radiation power level at the specific frequency Fs can be lowered compared to the conventional bus bar 1conv.
[0047] For example, in Figure 8 2 shows a bus bar 1B having reinforcing ribs 11B formed in a cross shape, such as an oblique cross shape. In this bus bar 1B, reinforcing ribs 11B are provided at 11 locations of the bus bar base 10, and the rigidity is improved at each location where the reinforcing ribs 11B are provided. Figure 5 The dotted line represents the equivalent radiation power level of the bus bar 1B. In the bus bar 1B, the equivalent radiation power level at the specific frequency Fs can be lowered compared to the conventional bus bar 1conv. Furthermore, in the bus bar 1B, the equivalent radiation power level at the specific frequency Fs can be lowered than the bus bar 1A provided with the circular reinforcement ribs 11A.
[0048] In addition, the reinforcing rib 11 may be formed in a linear shape extending in the same direction as the plate thickness direction of the bus bar terminal connecting portion 20A. Fig. 9 The bus bar 1C having the straight reinforcement ribs 11C is shown. In the bus bar 1C, the reinforcement ribs 11C are provided at four locations of the bus bar base 10, and the rigidity is improved at each location where the reinforcement ribs 11C are provided. In this example, the reinforcement ribs 11C at the four locations are arranged at substantially equal intervals. Figure 6The solid line represents the equivalent radiation power level of the bus bar 1C. In the bus bar 1C, the equivalent radiation power level at the specific frequency Fs can be lowered compared to the conventional bus bar 1conv.
[0049] As described above, the busbar 1 (1A, 1B, 1C) of the present embodiment improves rigidity by the reinforcing ribs 11 (11A, 11B, 11C) provided on the busbar base 10, and can suppress the vibration generated by the driving of the relay component 550 from propagating to the busbar base 10. Therefore, the busbar 1 (1A, 1B, 1C) can suppress the generation of abnormal noise caused by its own vibration. In addition, in the busbar 1 (1A, 1B, 1C), when the vibration generated by the driving of the relay component 550 is absorbed and attenuated by the relay terminal metal fitting 570, the vibration can be further suppressed from propagating to the busbar base 10, and thus the generation of abnormal noise caused by its own vibration can be further suppressed. On the other hand, in the bus bar 1 (1A, 1B, 1C), even if the relay terminal fittings 570 amplify the vibrations generated by driving the relay component 550, by providing the reinforcing ribs 11 (11A, 11B, 11C) at appropriate positions, the generation of abnormal noises caused by the self-vibration can be suppressed.
[0050] Furthermore, since the bus bar 1 ( 1A, 1B, 1C) of the present embodiment can suppress the vibration thereof, it is also possible to suppress the wear of the contact points between the bus bar terminal connecting portion 20A and the relay terminal fitting 570 .
Claims
1. A bus bar, characterized in that: have: a flat plate-shaped busbar base; and a bus bar terminal connection portion in the shape of a male tab, the bus bar terminal connection portion being arranged upright from the bus bar base, The bus bar terminal connection portion is electrically connected to the relay terminal connection portion of the relay component via the relay terminal fitting. The bus bar base is provided with a reinforcing rib, the reinforcing rib protruding from the plane at at least one position on the plane of the bus bar base, and the reinforcing rib suppresses shape deformation caused by vibration transmitted to the bus bar terminal connection portion accompanied by driving of the relay component.
2. The bus bar according to claim 1, wherein: The reinforcement rib is formed in a circular shape or a cross shape.
3. The bus bar according to claim 1, wherein: The reinforcement rib is formed in a linear shape extending in the same direction as a plate thickness direction of the bus bar terminal connecting portion.
4. The bus bar according to claim 1, 2 or 3, wherein: The bus bar terminal connection portion is physically and electrically connected to the relay terminal fitting by an elastic force of the relay terminal fitting acting on a plane of the bus bar terminal connection portion.
Citation Information
Patent Citations
Clamp and electronic device accommodating unit
JP2010259228A
Cited By
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