Double-helix shielding bus

Abstract

The utility model discloses a double-helix shielding bus which comprises a double-thread structure body, a bus shielding layer and a casing. The bus shielding layer and the casing are connected together through a double-thread structure body. The double-thread structural body comprises an outer cylinder layer and an inner cylinder layer, and internal threads are arranged on the inner wall of the outer cylinder layer and the inner wall of the inner cylinder layer; the inner cylinder layer is located in an inner cavity of the outer cylinder layer, and the outer cylinder layer and the inner cylinder layer are coaxially arranged. A containing cavity is formed between the outer cylinder layer and the inner cylinder layer, and the first end of the outer cylinder layer and the first end of the inner cylinder layer are connected into a whole. The external thread section of the bus shielding layer is in threaded connection with the internal thread on the inner wall of the inner cylinder layer; the outer peripheral face of the machine shell is a threaded face, and the threaded face of the machine shell is in threaded connection with the internal threads on the inner wall of the outer cylinder layer. The double-helix shielding bus has the advantages that good contact performance is achieved with low cost, the service life is prolonged, the EMC problem of the bus is reduced, and the like.

Description

Technical Field

[0001] The utility model relates to a simulation experiment platform, in particular to a double-helix shielding busbar. Background Art

[0002] In the prior art, the shielding layer of the motor controller busbar often causes EMC (ElectroMagnetic Compatibility) problems due to shielding contact problems. The EMC problem has high requirements for the contact performance of the busbar shielding layer. Whether the shielded wire harness has good contact is related to the EMC conduction and radiation noise problems. Having a good shielding layer contact effect can greatly reduce the EMC problems of the electric drive or even the entire vehicle, thereby solving the EMC problem.

[0003] There are three conventional contact structures for existing shielded busbars: spring-type snap-on contact, pin-type shielded contact, and extrusion-type shielded contact. (1) When the busbar shielding layer adopts spring-type snap-on contact, a spring-type snap-on will be placed in the busbar input port of the electric drive system. The snap-on contacts the outer wall of the electric drive system, and the inner ring of the snap-on is designed as a spring-type. When the busbar is inserted into the controller, the spring on the inner wall of the snap-on will contact the busbar shielding layer, thereby achieving a shielding grounding effect. This snap-on contact often causes the snap-on to lose its elasticity after plugging and unplugging, resulting in a significant reduction in the shielding contact performance. In addition, during the assembly process, the busbar will also be damaged when the snap-on is plugged and unplugged. (2) When the busbar adopts a pin-type shielded contact, the terminal is designed as a pin-type, the outer layer of the busbar is a circle of shielding, the busbar is directly inserted into the port, the busbar terminal is directly clamped, and the outer circle shielding layer is directly sleeved on the outer wall of the electric drive system to achieve shielding contact. The plug-in busbar has a relatively good shielding effect, but this type of busbar has the disadvantage of a high plug cost. (3) When the busbar adopts extruded shielding contact, the shielding layer at the busbar terminal will extend in diameter, and the shielding terminal is squeezed and contacted to the electric drive housing by a rubber plug to achieve shielding. For extruded shielding busbar, only one side of the port contacts the housing, and the contact effect is related to the waterproof rubber plug. The rubber plug needs to be long and wide enough to achieve good contact, so there will also be contact problems.

[0004] Since the above conventional contact structures all have their own problems, it is urgent to design a shielded busbar with low cost and better contact, while ensuring that its service life is long enough to reduce EMC problems. Utility Model Content

[0005] The utility model aims to avoid the deficiencies in the above-mentioned prior art and provides a double-helix shielded busbar, which ensures good contact performance, a long service life and reduces EMC problems at a relatively low cost.

[0006] The utility model adopts the following technical solutions to solve the technical problems.

[0007] The utility model discloses a double-helix shielded busbar, comprising a double-threaded structure 1, a busbar shielding layer 2 and a casing 3; the busbar shielding layer 2 and the casing 3 are connected together through the double-threaded structure 1;

[0008] The double-threaded structure 1 comprises an outer cylinder layer 11 and an inner cylinder layer 12, wherein the inner walls of the outer cylinder layer 11 and the inner walls of the inner cylinder layer 12 are both provided with internal threads; the inner cylinder layer is located in the inner cavity of the outer cylinder layer and the outer cylinder layer and the inner cylinder layer are coaxially arranged; an accommodating cavity 13 is arranged between the outer cylinder layer and the inner cylinder layer, and the first end of the outer cylinder layer and the first end of the inner cylinder layer are connected as a whole;

[0009] The external thread section 21 of the busbar shielding layer 2 is threadedly connected with the internal thread on the inner wall of the inner cylinder layer 12;

[0010] The outer peripheral surface 31 of the housing 3 is a threaded surface, and the threaded surface of the housing 3 is threadedly connected to the internal thread on the inner wall of the outer cylinder layer 11 .

[0011] The structural characteristics of a double-helix shielded busbar of the utility model are also as follows:

[0012] Furthermore, an outer hexagonal structure 14 is provided on the outer circumferential surface of the outer cylinder layer 11 .

[0013] Furthermore, the double-threaded structure 1 is a spliced ​​structure, including two spliced ​​bodies.

[0014] Furthermore, the splicing body includes a first splicing body and a second splicing body; the first splicing body is provided with two V-shaped notches 15, and the second splicing body is provided with two V-shaped ends 16; the two V-shaped ends are respectively embedded in the two V-shaped notches, so that the first splicing body and the second splicing body can be spliced ​​into one.

[0015] Furthermore, the busbar shielding layer 2 includes a busbar terminal 22 .

[0016] Furthermore, an outer hexagonal body 32 is provided on the outer peripheral surface of the housing 3 .

[0017] Compared with the prior art, the beneficial effects of the utility model are embodied in:

[0018] The utility model discloses a double-helix shielded busbar, comprising a double-threaded structure, a busbar shielding layer and a casing; the busbar shielding layer and the casing are connected together through the double-threaded structure; the double-threaded structure comprises an outer cylinder layer and an inner cylinder layer, and inner threads are arranged on the inner wall of the outer cylinder layer and the inner wall of the inner cylinder layer; the inner cylinder layer is located in the inner cavity of the outer cylinder layer and the outer cylinder layer and the inner cylinder layer are coaxially arranged; an accommodating cavity is arranged between the outer cylinder layer and the inner cylinder layer, and the first end of the outer cylinder layer and the first end of the inner cylinder layer are connected as a whole; the outer thread section of the busbar shielding layer is threadedly connected with the inner thread on the inner wall of the inner cylinder layer; the outer peripheral surface of the casing is a threaded surface, and the threaded surface of the casing is threadedly connected with the inner thread on the inner wall of the outer cylinder layer.

[0019] The double-helix shielded busbar of the utility model has the advantages of achieving good shielding contact performance at a relatively low cost, increasing the service life, reducing the EMC problems of the busbar, and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a double-thread structure of a double-helix shielding busbar. Figure 1 .

[0021] Figure 2 The utility model is a double-thread structure of a double-helix shielding busbar. Figure 2 .

[0022] Figure 3 It is a stereoscopic diagram of a busbar shielding layer of a double-helix shielded busbar of the utility model.

[0023] Figure 4 The utility model is a three-dimensional diagram of a casing of a double-helix shielded busbar.

[0024] The present invention is further described below through specific implementation methods in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0025] See also Figure 1 to Figure 4 The utility model discloses a double-helix shielded busbar, comprising a double-threaded structure 1, a busbar shielding layer 2 and a casing 3; the busbar shielding layer 2 and the casing 3 are connected together through the double-threaded structure 1;

[0026] The double-threaded structure 1 comprises an outer cylinder layer 11 and an inner cylinder layer 12, wherein the inner walls of the outer cylinder layer 11 and the inner walls of the inner cylinder layer 12 are both provided with internal threads; the inner cylinder layer is located in the inner cavity of the outer cylinder layer and the outer cylinder layer and the inner cylinder layer are coaxially arranged; an accommodating cavity 13 is arranged between the outer cylinder layer and the inner cylinder layer, and the first end of the outer cylinder layer and the first end of the inner cylinder layer are connected as a whole;

[0027] The external thread section 21 of the busbar shielding layer 2 is threadedly connected with the internal thread on the inner wall of the inner cylinder layer 12;

[0028] The outer peripheral surface 31 of the housing 3 is a threaded surface, and the threaded surface of the housing 3 is threadedly connected to the internal thread on the inner wall of the outer cylinder layer 11 .

[0029] The utility model discloses a double-helix shielding busbar, which comprises three parts, namely, a double-helix structure, a busbar shielding layer and a casing.

[0030] Figure 1 and Figure 2 It is a three-dimensional diagram of a double-thread structure. Figure 1 and Figure 2 The perspectives are different, so that the structure of the two spliced ​​bodies of the double-threaded structure can be better expressed. Figure 1 and Figure 2 As shown, the inner cylinder layer of the double-threaded structure is threadedly connected to the busbar shielding layer, and the outer cylinder layer of the double-threaded structure is threadedly connected to the casing, so that the busbar shielding layer and the casing are threadedly connected to the double-threaded structure to form an integral double-helix shielded busbar.

[0031] Depend on Figure 1 and Figure 2 It can be seen that the double-threaded structure is actually a cylindrical body composed of a coaxial inner cylinder layer and an outer cylinder layer, and the two are an integrated structure formed by closing one end (i.e., the first end of the outer cylinder layer) and opening the other end. The closed position is the part between the inner cylinder layer and the outer cylinder layer. The inner cylinder layer is still a cylinder with two ends open. The cavity between the inner cylinder layer and the outer cylinder layer is the accommodating cavity 13.

[0032] During the specific connection, the busbar shielding layer 2 is inserted into the inner cylinder layer 12 of the double-threaded structure 1, and the busbar shielding layer 2 and the double-threaded structure 1 are connected as one through the threaded connection between the outer thread section 21 of the busbar shielding layer 2 and the inner wall of the inner cylinder layer 12.

[0033] The housing 3 is a cylindrical body, the outer circumference of which is a threaded surface and the inner circumference is a smooth surface. The housing 3 is inserted into the accommodating cavity 13 provided between the outer cylinder layer 11 and the inner cylinder layer 12 of the double-threaded structure 1, and the threaded surface of the outer circumference of the housing 3 is threadedly connected with the inner wall of the outer cylinder layer, thereby connecting the housing 3 and the double-threaded structure 1 as a whole. In this way, the busbar shielding layer and the housing can be threadedly connected to the double-threaded structure, thereby achieving the purpose of the intermediate double-helix structure being in contact with the shielding layer and the housing at the same time and being threadedly tightened with each other.

[0034] In a specific implementation, an outer hexagonal structure 14 is provided on the outer peripheral surface of the outer cylinder layer 11 .

[0035] In a specific implementation, the double-threaded structure 1 is a spliced ​​structure, including two spliced ​​bodies.

[0036] In specific implementation, the splicing body includes a first splicing body and a second splicing body; the first splicing body is provided with two V-shaped notches 15, and the second splicing body is provided with two V-shaped ends 16; the two V-shaped ends are respectively embedded in the two V-shaped notches, so that the first splicing body and the second splicing body can be spliced ​​into one.

[0037] The utility model discloses a double-helix shielded busbar, wherein the double-helix structure is designed to be spliced. The two spliced ​​bodies are spliced ​​by the mutual engagement of the V-shaped notch and the V-shaped end. In specific implementation, structures such as a W-shaped notch and a W-shaped end, a rectangular notch and a rectangular end can also be used to splice the first spliced ​​body and the second spliced ​​body.

[0038] During specific implementation, the busbar shielding layer 2 includes a busbar terminal 22 .

[0039] like Figure 2 When connecting, first connect and fix the busbar terminal 22 to the busbar power supply sample. When connecting, the busbar terminal fixing point must be consistent and the position accuracy must be high, otherwise the double helix structure may not be tightened with the busbar shielding layer and the shell at the same time.

[0040] In specific implementation, the thread can also be processed into a discontinuous thread, or a convex structure can be set on the smooth surface of the inner wall of the housing 3. When the busbar shielding layer 2 is inserted into the inner cylinder layer 12 of the double-threaded structure 1, Figure 3 The outer diameter of the outer peripheral surface of the outer thread section 21 of the busbar shielding layer 2 is thicker than the outer diameter of the busbar shielding layer 2 body, so a step surface is formed between the outer thread section 21 and the body.

[0041] After the connection is completed, the double helix structure is spliced ​​and clamped on the busbar. The double helix structure 1 is rotated to the bottom of the external thread section 21. At this time, the threads of the external thread section 21 and the outer peripheral surface 31 of the casing 3 are on the same plane, and the double helix structure can be tightened. The outer periphery of the double helix structure 1 is designed with an external hexagonal structure 14, which can be tightened with a wrench.

[0042] In a specific implementation, an outer hexagonal body 32 is provided on the outer peripheral surface of the housing 3 .

[0043] The utility model discloses a double-helix shielded busbar, which connects the busbar shielding layer to the casing through a double-helix structure to achieve full contact, solves the problem of insufficient connection of the EMC shielding layer, and reduces the EMC problem in the operation of the motor controller busbar. At the same time, the threaded pair connection structure ensures the consistency of assembly, and there will be no problems such as deformation and disconnection. At the same time, it is easy to disassemble and assemble, and has greatly improved disassembly and assembly and service life compared with the shrapnel contact. In terms of cost, a lot of costs are reduced compared with the integrated busbar. For the double-helix shielded busbar of the utility model, if the service life is considered from the perspective of EMC, each disassembly and assembly of the shrapnel structure will involve the elastic performance of the shrapnel, and the normal service life is 8 years, while the service life of this utility model can be increased to 15 years. Considering the cost, the cost of the utility model is estimated to be reduced by 200-1000 yuan.

[0044] In the specific use of the double helix shielded busbar of the utility model, considering the waterproof and airtightness, etc., a space can be reserved inside the double helix structure to place the sealing rubber ring, or a plastic sleeve can be added to the outermost layer of the whole to ensure fixation after tightening, or a sealing treatment can be performed at the gap. These methods can solve the waterproof and airtightness problems of the double helix shielded busbar of the utility model during use.

[0045] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A double helix shielded busbar, characterized in that: It comprises a double-threaded structure (1), a busbar shielding layer (2) and a casing (3); the busbar shielding layer (2) and the casing (3) are connected together via the double-threaded structure (1); The double-threaded structure (1) comprises an outer cylinder layer (11) and an inner cylinder layer (12), wherein the inner wall of the outer cylinder layer (11) and the inner wall of the inner cylinder layer (12) are both provided with internal threads; the inner cylinder layer is located in the inner cavity of the outer cylinder layer and the outer cylinder layer and the inner cylinder layer are coaxially arranged; an accommodating cavity (13) is arranged between the outer cylinder layer and the inner cylinder layer, and the first end of the outer cylinder layer and the first end of the inner cylinder layer are connected as a whole; The external thread section (21) of the busbar shielding layer (2) is threadedly connected to the internal thread on the inner wall of the inner cylinder layer (12); The outer peripheral surface (31) of the casing (3) is a threaded surface, and the threaded surface of the casing (3) is threadedly connected to the internal thread on the inner wall of the outer cylinder layer (11).

2. A double helix shielded busbar according to claim 1, characterized in that: An outer hexagonal structure (14) is provided on the outer peripheral surface of the outer cylinder layer (11).

3. A double helix shielded busbar according to claim 1, characterized in that: The double-threaded structure (1) is a spliced ​​structure, comprising two spliced ​​bodies.

4. A double helix shielded busbar according to claim 3, characterized in that: The splicing body comprises a first splicing body and a second splicing body; the first splicing body is provided with two V-shaped notches (15), and the second splicing body is provided with two V-shaped ends (16); the two V-shaped ends are respectively embedded in the two V-shaped notches, so that the first splicing body and the second splicing body can be spliced ​​into one body.

5. A double helix shielded busbar according to claim 1, characterized in that: The busbar shielding layer (2) comprises a busbar terminal (22).

6. A double helix shielded busbar according to claim 1, characterized in that: An outer hexagonal body (32) is provided on the outer peripheral surface of the casing (3).

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