Surface-contact type terminal block assembly and its sub-terminals

Abstract

The present invention provides a surface-contact type terminal block assembly and its sub-terminal. The surface-contact type terminal block assembly includes two sub-terminals. Specifically, the sub-terminal includes a plate-shaped main body in a two-layer stepped shape, and a lead clamping hole and a terminal fastening hole that penetrate the main body and have mutually perpendicular extending directions. The main body includes an upper plate body as the upper layer step and a lower plate body as the lower layer step. In a state where the sub-terminal is placed flat on a horizontal plane, in the vertical direction, the upper plate body and the lower plate body intersect and overlap, and along the horizontal direction in the length direction of the sub-terminal, one end of the upper plate body and the lower plate body is flush, and at the other end, the lower plate body protrudes outward relative to the upper plate body. The lead clamping hole extends along the length direction and penetrates the adjacent part of the upper plate body and the lower plate body, and the terminal fastening hole extends in the vertical direction and penetrates the part of the lower plate body that protrudes outward relative to the upper plate body.

Description

Technical Field

[0001] The present invention relates to a terminal assembly, and particularly to a surface contact type terminal assembly and its sub-terminals. Background Art

[0002] The heating method using electric heating is to conduct current through a wire into a heating wire, and the heating wire generates heat for heating. The connection between the wire and the heating wire usually has a clip-fixed type and a set-screw-fixed type. Due to the structural design of the terminal assembly, the contact area between the terminal and the wire is small, the contact resistance is large, there is a possibility of overheating of the contact point, and there is a fire risk during long-term use. Designers usually design the high-temperature area to be relatively safe, and these positions that should not be high-temperature are easily overlooked. Excessive contact resistance and overheating of the contact point will affect the use safety of the entire product. The design of the terminal assembly is an important link in the product life and use safety.

[0003] The gas medium high-temperature and high-pressure experimental system is an important experimental platform. The maximum operating temperature of the experimental system is 600 °C, and the maximum operating pressure is 400 MPa. The experimental system uses the heating furnace developed by us for heating, in which a molybdenum lanthanum wire with a diameter cross-section of 0.5 mm is used as the heating wire, and the lead-out end of the heating wire is a nickel wire with a diameter cross-section of 1.2 mm and is a bare wire. The pressure vessel of the experimental system can provide a working pressure of up to 400 MPa. The lead terminals are evenly assembled on the sealing end head. The lead terminals conduct current into the container interior and need to be reliably connected to the lead-out end of the heating furnace. During the sample loading and unloading process, the sealing end head needs to be disassembled from the heating furnace, which requires the lead terminals to be repeatedly disassembled and connected to the lead-out end of the heating furnace.

[0004] Therefore, it is indeed necessary to provide a surface contact type terminal assembly that can solve the connection problem between the heating furnace wire and the lead terminal head in the pressure chamber. Summary of the Invention

[0005] In view of the above problems in the prior art, the present invention is proposed. The present invention aims to provide a sub-terminal of a surface-contact type terminal block assembly, which includes a plate-shaped main body in a two-layer stepped shape and a lead clamping hole and a terminal fastening hole that penetrate the main body and have mutually perpendicular extending directions. Among them, the main body includes an upper plate body as the upper layer step and a lower plate body as the lower layer step. In a state where the sub-terminal is placed flat on a horizontal plane, the upper plate body and the lower plate body overlap in the vertical direction, and along the horizontal direction in the length direction of the sub-terminal, one end of the upper plate body and the lower plate body are flush, and at the other end, the lower plate body protrudes outward relative to the upper plate body. Moreover, the lead clamping hole extends along the length direction and penetrates the adjacent part of the upper plate body and the lower plate body, and the terminal fastening hole extends along the vertical direction and penetrates the part of the lower plate body that protrudes outward relative to the upper plate body.

[0006] The present invention also provides a surface-contact type terminal block assembly, which includes a first sub-terminal, a second sub-terminal that cooperates with the first terminal, and a terminal fastening screw. Among them, the first sub-terminal has the structure of the sub-terminal as described above, and the second sub-terminal has the structure of the sub-terminal as described above. Moreover, the shape of the first terminal contact surface of the first sub-terminal matches the shape of the second terminal contact surface of the second sub-terminal. And in the working state where the first sub-terminal and the second sub-terminal are connected to each other, the second sub-terminal is connected to the first terminal in a state that is inverted in the vertical direction with respect to the first sub-terminal, and the terminal fastening screw passes through the first terminal fastening hole of the first sub-terminal and the second terminal fastening hole of the second sub-terminal to connect the first sub-terminal and the second sub-terminal together.

[0007] The beneficial effects of the surface-contact type terminal block assembly provided by the present invention are as follows: First, through the first terminal fastening hole and the second terminal fastening hole, the first sub-terminal and the second sub-terminal can be disassembled and assembled easily; Second, by clamping the lead between the two terminal contact surfaces, surface contact is achieved between the first sub-terminal and the second sub-terminal, between the lead and the first sub-terminal, and between the lead and the second sub-terminal, increasing the contact area between them and reducing the contact resistance; Third, through the shrapnel process hole, the assembly difficulty of the lead and the surface-contact type terminal block assembly is reduced, and the shrapnel process hole structure greatly reduces the possibility of the lead fastening screw loosening; Fourth, the area of the terminal contact surface of the surface-contact type terminal block assembly is relatively large, effectively protecting the safety of the power supply lead side. Fifth, the diameter of the lead is consistent with the aperture of the first lead clamping hole and the second lead clamping hole respectively, so that the lead realizes surface contact with the first sub-terminal and the second sub-terminal in the circumferential direction, increasing the contact area and thus reducing the contact resistance. Description of the Drawings

[0008] Figure 1 It is a perspective view showing the surface contact type terminal block assembly according to an embodiment of the present invention in an assembled state.

[0009] Figure 2 It is a perspective view showing the surface contact type terminal block assembly according to an embodiment of the present invention in a disassembled state.

[0010] Figure 3 It is a perspective view showing a first sub-terminal according to an embodiment of the present invention.

[0011] Figure 4 It is a front view showing a first sub-terminal according to an embodiment of the present invention.

[0012] Figure 5 It is showing along the Figure 4 sectional view of the first sub-terminal taken along the D-D section line in.

[0013] Figure 6 It is a top view showing a first sub-terminal according to an embodiment of the present invention.

[0014] Figure 7 It is showing along the Figure 6 sectional view of the first sub-terminal taken along the C-C section line in.

[0015] Figure 8 It is a front view showing a second sub-terminal according to an embodiment of the present invention.

[0016] Figure 9 It is showing along the Figure 8 sectional view of the second sub-terminal taken along the D-D section line in.

[0017] Figure 10 It is a top view showing a second sub-terminal according to an embodiment of the present invention.

[0018] Figure 11 It is showing along the Figure 10 sectional view of the second sub-terminal taken along the C-C section line in.

[0019] Figure 12 It is a front view of the first sub-terminal showing the dimensions of the first sub-terminal according to an embodiment of the present invention.

[0020] Figure 13 It is a top view of the first sub-terminal showing the dimensions of the first sub-terminal according to an embodiment of the present invention.

[0021] Figure 14 It is a left view of the first sub-terminal showing the dimensions of the first sub-terminal according to an embodiment of the present invention. Detailed Embodiments

[0022] The following will refer to the accompanying drawings to describe in detail the specific embodiments of the surface contact type terminal block assembly and its sub-terminals of the present invention.

[0023] The following refers to Figures 1 to 14 to describe in detail the schematic structures of the surface contact type terminal block assembly and its sub-terminals according to the embodiments of the present invention.

[0024] First, for the convenience of clearly describing the present invention, the following definitions of directions used in the present disclosure are given. As Figure 1 shown, the XY plane in the rectangular coordinate system in Figure 3 is defined as the horizontal plane, where the X direction is defined as the length direction of the first sub-terminal 10, the Y direction is defined as the width direction of the first sub-terminal 10, and the direction where the Z axis is located is defined as the vertical direction or the thickness direction of the first sub-terminal 10.

[0025] As Figures 1 to 7 shown, the first embodiment of the present invention provides a surface contact type terminal block assembly 1, which includes a first sub-terminal 10 and a second sub-terminal 20. The first sub-terminal 10 includes a first main body 11 in the shape of a plate with two layers of steps, and a first lead clamping hole 12 and a first terminal fastening hole 13 that penetrate the first main body 11 and whose extending directions are perpendicular to each other, wherein the extending direction of the first lead clamping hole 12 is perpendicular to the extending direction of the first terminal fastening hole 13. The first terminal fastening hole 13 is formed on the first terminal contact surface 16, and its extending direction is perpendicular to the first terminal contact surface 16. The second sub-terminal 20 includes a second main body in the shape of a plate with two layers of steps, and a second lead clamping hole and a second terminal fastening hole that penetrate the second main body and whose extending directions are perpendicular to each other, wherein the extending direction of the second lead clamping hole is perpendicular to the extending direction of the second terminal fastening hole, and the second terminal fastening hole is formed on the second terminal contact surface, and its extending direction is perpendicular to the second terminal contact surface.

[0026] The structures of the first sub-terminal 10 and the second sub-terminal 20 are similar, except that one of the first terminal fastening hole 13 and the second terminal fastening hole is a clearance hole, and the other is a threaded hole, and they are interchangeable. The positions of the first terminal fastening hole 13 and the second terminal fastening hole are opposite, so that the terminal fastening screw 114 can pass through the first terminal fastening hole 13 and the second terminal fastening hole to fasten the first sub-terminal 10 and the second sub-terminal 20 together. The following takes the first sub-terminal 10 as an example to describe its structure in detail.

[0027] The shape of the first main body 11 is generally a plate shape with steps. Specifically, it includes an upper plate body 14 as the upper step and a lower plate body 15 as the lower step.

[0028] In a state where the first sub-terminal 10 is placed flat along a horizontal plane, in the vertical direction, the upper plate body 14 and the lower plate body 15 overlap each other. Along the horizontal direction and in the length direction of the first sub-terminal 10, one end of the upper plate body 14 and the lower plate body 15 are flush with each other, and at the other end, the lower plate body 15 protrudes outward relative to the upper plate body 14. Moreover, the first lead clamping hole 12 extends along the length direction and penetrates through the adjacent part of the upper plate body 14 and the lower plate body 15, and the first terminal fastening hole 13 extends along the vertical direction and penetrates through the part of the lower plate body 15 that protrudes outward relative to the upper plate body 14.

[0029] The upper plate body 14 and the lower plate body 15 are made integrally, and the upper surface area of the upper plate body 14 is smaller than the upper surface area of the lower plate body 15. The side end surface of the upper plate body 14, which is the side surface of the upper step, is the vertical terminal contact surface of the first sub-terminal 10 in the assembled state, and the top surface of the lower plate body 15, which is the table surface of the lower step and protrudes outward from the upper plate body 14, is the horizontal terminal contact surface of the first sub-terminal 10 in the assembled state, that is, the above-mentioned first terminal contact surface 16. The first main body 11 is formed as an open end 111 at the end where the upper plate body 14 and the lower plate body 15 are flush with each other, and the other end is formed as a closed end 112 where the upper plate body 14 and the lower plate body 15 are integrally connected. Among them, starting from the side of the lead clamping hole close to the open end, along the width direction of the first sub-terminal 10, the closer to the open end 111, the larger the distance between the adjacent end faces of the upper plate body 14 and the lower plate body 15, so as to form a wedge-shaped groove-like trench 17. Figure 5 and Figure 6 As described above, the formation of the trench 17 is formed by wire-cutting the top of the lower plate body 15 close to the open end 111.

[0030] The first sub-terminal 10 further includes a spring piece process hole 18 that is spaced a predetermined distance from the first lead clamping hole 12 along the width direction of the lower plate body 15 and penetrates along the length direction of the first sub-terminal 10 at the adjacent part of the upper plate body 14 and the lower plate body 15. Both the first lead clamping hole 12 and the spring piece process hole 18 are formed by grooves with matching shapes formed at the bottom of the upper plate body 14 and the top of the lower plate body 15. Specifically, the shape of the groove can be semicircular, or can be semi-elliptical, rectangular with rounded corners and other shapes.

[0031] In the width direction of the first sub-terminal 10, the first lead clamping hole 12 is located in the central region, while the elastic sheet process hole 18 is located in a region closer to the closed end 112 relative to the first lead clamping hole 12. The first sub-terminal 10 further includes: a lead fixing hole 19 formed in a region near the open end 111 and penetrating the upper plate body 14 and the lower plate body 15 in the vertical direction; and a lead fastening screw 113 cooperating with the lead fixing hole 19. Among them, the part of the lead fixing hole 19 in the upper plate body 14 is a smooth hole, and the part of the lead fixing hole 19 in the lower plate body 15 is a threaded hole. In the assembled state of the first sub-terminal 10, the lead fastening screw 113 passes through the lead fixing hole 19 to fix the lead 115 in the first lead clamping hole 12. Optionally, the part of the lead fixing hole 19 in the upper plate body 14 is a threaded hole, and the part of the lead fixing hole 19 in the lower plate body 15 is a smooth hole.

[0032] The working principle of the surface contact type wiring terminal assembly 1 provided by the present invention is as follows: In use, first, two leads 115, such as a wire and a heating wire lead-out wire, are respectively passed through the first lead clamping hole 12 of the first sub-terminal 10 and the second lead clamping hole of the second sub-terminal 20. The diameters of the leads 115 are consistent with the diameters of the first lead clamping hole 12 and the second lead clamping hole respectively, and the leads 115 are hard wires. The wire and the heating wire are respectively clamped in the first lead clamping hole 12 of the first sub-terminal 10 and the second lead clamping hole of the second sub-terminal 20 through the lead fixing holes and lead fastening screws on the two sub-terminals; then, the first terminal contact surface 16 of the first sub-terminal 10 and the second terminal contact surface of the second sub-terminal 20 are in face-to-face contact with each other, and then the terminal fastening screw 114 is passed through the first terminal fastening hole 13 and the second terminal fastening hole to fix the first terminal contact surface 16 of the first sub-terminal 10 and the second terminal contact surface of the second sub-terminal 20 face-to-face together. In this way, the wire and the heating wire lead-out wire are clamped between the terminal contact surfaces of the two sub-terminals, realizing the surface contact type electrical connection between the leads 115; after that, in the case where the leads 115 need to be powered off, by screwing out the terminal fastening screw 114 from the first terminal fastening hole 13 in the first sub-terminal 10 and the second terminal fastening hole in the second sub-terminal 20, the disassembly of the first sub-terminal 10 and the second sub-terminal 20 can be realized.

[0033] Please refer to Figures 8 to 12 , which is a schematic structural diagram of the second sub-terminal 20. The structure of the second sub-terminal 20 is similar to that of the first sub-terminal 10, except that one of the first terminal fastening hole 13 in the first sub-terminal 10 and the second terminal fastening hole in the second sub-terminal 20 is a smooth hole, and the other is a threaded hole, and they are interchangeable.

[0034] Please refer toFigures 12 to 14 , the dimensions and manufacturing processes of the components of the first sub-terminal 10 will be described in detail below. The meanings of the symbols in the figure are as follows: H1: the depth of the shrapnel process hole 18; H2: the depth of the first lead clamping hole 12; D1: the diameter of the first lead clamping hole 12; D2: the diameter of the shrapnel process hole 18; L1: the height of the first sub-terminal 10; L2: the dimension of the lower plate body 15 along the Y direction; L3: the width of the groove 17; H3: the dimension of the upper plate body 14 along the X direction; and H4: the dimension of the first terminal contact surface 16 along the X direction.

[0035] The relationships of the above dimensions are 3×D1 ≤ H1 = H2 = H3 ≤ 4×D1; H4 ≥ H3; L1 = 2×D2 = 3×D1. The centers of the first lead clamping hole 12 and the shrapnel process hole 18 are at the midpoint of the first sub-terminal 10 along the Z direction. L3 = 0.2×D1. The centers of the lead clamping hole 12 and the shrapnel process hole 18 form a center line, and the angle formed by this center line and the upper surface of the lower plate body 15 near the opening end 111 is the angle of the groove 17, and this angle is 4 to 6 degrees.

[0036] The groove 17 is obtained by wire cutting, the shrapnel process hole 18 and the first lead clamping hole 12 are obtained by drilling, and the first terminal contact surface 16 is obtained by milling. The surface contact type terminal block assembly 1 is made of beryllium bronze, and beryllium bronze has high stiffness and low resistivity.

[0037] The beneficial effects of the surface contact type terminal block assembly 1 provided by the present invention are as follows:

[0038] First, through the first terminal fastening hole 13 and the second terminal fastening hole, the first sub-terminal 10 and the second sub-terminal 20 can be disassembled and assembled easily;

[0039] Second, by clamping the lead 115 between the two terminal contact surfaces, surface contact is achieved between the first sub-terminal 10 and the second sub-terminal 20, and between the lead 115 and the first sub-terminal 10 and the second sub-terminal 20 respectively, increasing the contact area between them and reducing the contact resistance;

[0040] Third, through the shrapnel process hole 18, the assembly difficulty of the lead 115 and the surface contact type terminal block assembly 1 is reduced, and the structure of the shrapnel process hole 18 greatly reduces the possibility of loosening of the lead fastening screw 113; and

[0041] Fourth, the area of the terminal contact surface of the surface contact type terminal block assembly 1 is relatively large, effectively protecting the safety of the power supply lead side.

[0042] Fifthly, the diameter of the lead 115 is respectively consistent with the aperture diameters of the first lead clamping hole 12 and the second lead clamping hole, so that the lead 115 realizes surface contact with the first sub-terminal 10 and the second sub-terminal 20 in the circumferential direction, increasing the contact area and thus reducing the contact resistance.

[0043] Although the present invention has been described above with reference to exemplary embodiments, the above embodiments are only for explaining the technical concept and features of the present invention and cannot limit the protection scope of the present invention. Any equivalent variation or modification made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

[0044] Description of reference numerals:

[0045] 1 Surface contact type wiring terminal assembly;

[0046] 10 First sub-terminal;

[0047] 11 First main body;

[0048] 12 First lead clamping hole;

[0049] 13 First terminal fastening hole;

[0050] 14 Upper plate body;

[0051] 15 Lower plate body;

[0052] 16 First terminal contact surface;

[0053] 17 Groove;

[0054] 18 Shrapnel process hole;

[0055] 19 Lead fastening hole;

[0056] 20 Second sub-terminal;

[0057] 111 Open end;

[0058] 112 Closed end;

[0059] 113 Lead fastening screw;

[0060] 114 Terminal fastening screw;

[0061] 115 Lead.

Claims

1. A sub-terminal of a surface-contact type terminal block assembly, comprising a plate-shaped body in a two-layer stepped shape, and a lead clamping hole and a terminal fastening hole that penetrate the body and have mutually perpendicular extending directions, wherein, The main body includes an upper plate body serving as an upper step and a lower plate body serving as a lower step. In a state where the sub-terminal is placed flat along the horizontal plane, the upper plate body and the lower plate body overlap in the vertical direction. Along the horizontal direction and in the length direction of the sub-terminal, one end of the upper plate body and the lower plate body is flush, and at the other end, the lower plate body protrudes outward relative to the upper plate body. Moreover, the lead clamping hole extends along the length direction and penetrates through the adjacent part of the upper plate body and the lower plate body, and the terminal fastening hole extends along the vertical direction and penetrates through the part of the lower plate body that protrudes outward relative to the upper plate body. Among them, the main body is formed as an open end at the end where the upper plate body and the lower plate body are flush, and the other end is formed as a closed end where the upper plate body and the lower plate body are integrally connected. Among them, along the width direction of the sub-terminal and the closer to the open end, starting from the side of the lead clamping hole close to the open end, the distance between the adjacent end faces of the upper plate body and the lower plate body becomes larger to form a wedge-shaped groove-like trench. Among them, the trench is formed by wire-cutting the top of the lower plate body close to the open end.

2. The sub-terminal according to claim 1, characterized in that, The upper plate body and the lower plate body are made into one body, and the upper surface area of the upper plate body is smaller than the upper surface area of the lower plate body. The side end face of the upper plate body serving as the side face of the upper step is the vertical terminal contact surface of the sub-terminal in the assembled state, and the top face of the part of the lower plate body serving as the lower step table top and protruding outward from the upper plate body is the horizontal terminal contact surface of the sub-terminal in the assembled state.

3. The sub-terminal according to claim 1, characterized in that, The sub-terminal further includes a shrapnel process hole that is spaced a predetermined distance from the lead clamping hole along the width direction of the lower plate body and penetrates along the length direction of the sub-terminal at the adjacent part of the upper plate body and the lower plate body. Both the lead clamping hole and the shrapnel process hole are formed by grooves with matching shapes formed at the bottom of the upper plate body and the top of the lower plate body.

4. The sub-terminal according to claim 3, characterized in that, In the width direction of the sub-terminal, the lead clamping hole is located in the central area, and the shrapnel process hole is located in the area closer to the closed end relative to the lead clamping hole.

5. The sub-terminal according to claim 1, characterized in that, The sub-terminal further includes: a lead fixing hole formed in a manner of penetrating the upper plate body and the lower plate body along the vertical direction in the area close to the open end; and, a lead fastening screw that cooperates with the lead fixing hole. Among them, the part of the lead fixing hole in the upper plate body is a clearance hole, and the part of the lead fixing hole in the lower plate body is a threaded hole. In the assembled state of the sub-terminal, the lead fastening screw passes through the lead fixing hole to fix the lead in the lead clamping hole.

6. The sub-terminal according to claim 1, characterized in that, The sub-terminal further includes: a lead fixing hole formed in a manner of penetrating the upper plate body and the lower plate body along the vertical direction in the area close to the open end; and, a lead fastening screw that cooperates with the lead fixing hole. Among them, the part of the lead fastening hole in the upper plate body is a threaded hole, and the part of the lead fastening hole in the lower plate body is a smooth hole. In the assembled state of the sub-terminal, the lead fastening screw passes through the lead fastening hole to fix the lead in the lead clamping hole.

7. The sub-terminal according to claim 1, characterized in that, The terminal fastening hole is a threaded hole.

8. The sub-terminal according to claim 1, characterized in that, The terminal fastening hole is a smooth hole.

9. A surface-contact type terminal block assembly (1), comprising a first sub-terminal (10), a second sub-terminal (20) that cooperates with the first terminal, and a terminal fastening screw (114), Wherein, The first sub-terminal has the structure of the sub-terminal according to any one of claims 1-7, and the second sub-terminal has the structure of the sub-terminal according to any one of claims 1-6 and 8. Moreover, the first terminal contact surface (16) of the first sub-terminal matches the shape of the second terminal contact surface of the second sub-terminal. In the working state where the first sub-terminal (10) is connected to the second sub-terminal, the second sub-terminal is connected to the first terminal in a state inverted with respect to the first sub-terminal in the vertical direction, and the terminal fastening screw passes through the first terminal fastening hole (13) of the first sub-terminal and the second terminal fastening hole of the second sub-terminal to connect the first sub-terminal and the second sub-terminal together.

Images