Bus bar with high flexural rigidity

Abstract

The utility model discloses a busbar with high flexural rigidity, which comprises a top plate and two side walls arranged on one side plate surface of the top plate, a rib plate is arranged between the two side walls, and a cavity hole is defined by the rib plate, the top plate and the inner wall surfaces of the two side walls; the section of the cavity hole is kidney-shaped, two ends of the kidney-shaped section are semicircular arcs, and two side edges of the kidney-shaped section are parallel and are arc sections; the cavity holes are formed by stacking about a first plane, and the first plane is a symmetric plane of the two side wall main bodies. By adding the rib plate and the cavity hole with the kidney-shaped section, the bending rigidity of the section of the busbar with the pi-shaped section in the vertical line direction is improved, the deflection of the busbar in the vertical line direction after installation is reduced, the levelness of a contact line in the line direction is guaranteed, and the pantograph-catenary current collection quality, safety and stability are further improved and guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of busbars, and particularly relates to a busbar with high bending stiffness. Background Art

[0002] The busbar is an important part of the suspension catenary system, used for clamping and fixing the contact wire and carrying and transmitting current. The common structure of the busbar is an aluminum alloy extruded profile with a π-shaped cross-section. The cross-section is a special-shaped open structure, and the ends of two vertical sides form a clamping mouth. The clamping mouth can be elastically opened to embed the contact wire and naturally restore after removing the external force. Its elasticity generates pressure to clamp the contact wire, which can effectively prevent the relative sliding between the busbar and the contact wire during expansion and contraction. The existing busbar structure with a π-shaped cross-section, such as Figure 3 shown, has a relatively low bending stiffness of the cross-section along the vertical line direction, which affects the horizontality of the contact wire clamped by the busbar along the line direction. Summary of the Utility Model

[0003] The problem to be solved by the utility model is to overcome the defects of the prior art and provide a busbar with high bending stiffness, optimize the structure of the busbar with a π-shaped cross-section, improve the bending stiffness of the cross-section along the vertical line direction, and ensure the horizontality of the contact wire along the line direction.

[0004] To solve the above technical problems, the utility model provides a busbar with high bending stiffness, which includes a top plate and two side walls arranged on one side surface of the top plate. A rib plate is arranged between the two side walls, and a cavity hole is formed by enclosing the rib plate, the top plate and the inner wall surfaces of the two side walls; the cross-section of the cavity hole is waist-shaped, and the two ends of the waist shape are semi-circular arcs, and the two side edges are parallel and are both arc segments; the cavity hole is symmetric about a first plane, wherein the first plane is the symmetric plane of the two side wall bodies.

[0005] In the above busbar with high bending stiffness, by adding a rib plate and a cavity hole with a waist-shaped cross-section, the bending stiffness of the cross-section of the busbar with a π-shaped cross-section along the vertical line direction is improved, the deflection of the busbar along the vertical line direction after installation is reduced, the horizontality of the contact wire along the line direction is ensured, and the current collection quality and safety and stability of the pantograph-catenary system are further improved and guaranteed.

[0006] Preferably, the central axes of the upper and lower arc surfaces of the cavity hole are both located on the first plane.

[0007] Further, the width d of the cavity hole is 0.7W - 0.75W, where W is the distance between the outer walls of the two side wall bodies.

[0008] Further, the radial distance h between the two sides of the cavity hole is 0.4H - 0.5H, where H is the distance between the other side surface line of the top plate and the plate surface line of the rib plate away from the top plate on the first plane.

[0009] Further, on the first plane, the cavity hole is located at the exact center position between the side plate surface line of the other side of the top plate and the plate surface line of the rib plate away from the top plate.

[0010] Further, the cavity hole arches towards the top plate.

[0011] Further, both the cavity hole and the rib plate are long straight structures arranged along the length direction of the high bending stiffness busbar.

[0012] Further, the cross-section of the rib plate away from the plate surface line of the top plate is in the shape of an isosceles trapezoid with the top side close to the top plate.

[0013] Further, the other side plate surface of the top plate is a plane parallel to the length direction of the high bending stiffness busbar.

[0014] In summary, by adopting the above high bending stiffness busbar, the π-shaped cross-section busbar structure is optimized to improve the cross-section bending stiffness along the vertical line direction and ensure the horizontality of the contact wire along the line direction. Description of the Drawings

[0015] In the drawings:

[0016] Figure 1 is a schematic cross-sectional view of the high bending stiffness busbar of the present invention.

[0017] Figure 2 is a schematic longitudinal-sectional view of the high bending stiffness busbar of the present invention.

[0018] Figure 3 is a schematic cross-sectional view of the existing busbar.

[0019] In the figure, 1 is the top plate; 2 is the side wall; 3 is the rib plate; 4 is the cavity hole. Detailed Embodiments

[0020] The following further describes the detailed embodiments of the present invention with reference to the drawings. It should be noted here that the description of these embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention.

[0021] The shape of the waist-shaped hole (also called kidney-shaped) is an elongated rectangle or ellipse, but not a strictly geometric shape. The side edges can be straight or have a certain curvature. Its length is usually much greater than the width to meet specific connection requirements. The two ends of the waist-shaped hole can be designed as rounded corners or semi-circular arcs, and this design is to reduce stress concentration, improve the durability of the part, and facilitate the assembly and positioning of the part. However, not all waist-shaped holes must have rounded corners, which depends on the specific design requirements and application scenarios.

[0022] Embodiment 1

[0023] Figure 1 and Figure 2 shows a busbar with high bending stiffness of the present utility model. As Figure 1 shown, the busbar with high bending stiffness includes a top plate 1 and two side walls 2 provided on one side surface of the top plate 1. A rib plate 3 is provided between the two side walls 2. The rib plate 3, the top plate 1 and the inner wall surfaces of the two side walls 2 enclose a cavity hole 4; the cross-section of the cavity hole 4 is waist-shaped, and the two ends of the waist shape are semi-circular arcs, and the two side edges are parallel and are both arc segments; the cavity hole 4 is symmetric about a first plane, wherein the first plane is the symmetric plane of the main bodies of the two side walls 2.

[0024] As Figure 1 shown, the central axes of the upper and lower arc surfaces of the cavity hole 4 are both located on the first plane. The width d of the cavity hole 4 is 0.7W - 0.75W, wherein W is the distance between the outer walls of the main bodies of the two side walls 2. The width of the cavity hole 4 is designed according to the actual width of the two side walls 2 to ensure effective strengthening of the structural strength.

[0025] As Figure 1 and Figure 2 shown, the radial distance h between the two sides of the cavity hole 4 is 0.4H - 0.5H, wherein H is the distance between the line of the other side surface of the top plate 1 and the line of the plate surface of the rib plate 3 far from the top plate 1 on the first plane. On the first plane, the cavity hole 4 is located at the exact center position between the line of the other side surface of the top plate 1 and the line of the plate surface of the rib plate 3 far from the top plate 1. The cavity hole 4 is designed according to the actual thickness between the top plate 1 and the rib plate 3 in the vertical direction to ensure effective strengthening of the structural strength.

[0026] As Figure 1 shown, the cavity hole 4 arches towards the top plate 1. The other side surface of the top plate 1 is a plane parallel to the length direction of the busbar with high bending stiffness. The cavity hole 4 and the rib plate 3 are both long straight structures arranged along the length direction of the busbar with high bending stiffness.

[0027] As Figure 2 shown, the cross-section of the rib plate 3 far from the plate surface line of the top plate 1 is in the shape of an isosceles trapezoid with the top edge close to the top plate 1. The bottom surface of the rib plate 3 and the cavity hole 4 are both in the shape of arching towards the top plate 1, ensuring that the thickness of the rib plate 3 changes little in the width direction and has high structural strength.

[0028] During use, when actually designing the busbar, as Figure 3Adding rib plates 3 and cavity holes 4 to the existing structure shown will increase the opening force at the clamping mouths of the two side walls 2. The busbar holds the contact wire through a pay-off trolley. If the opening force of the clamping mouth is too large, it will affect or increase the construction difficulty of the pay-off operation to a certain extent, that is, we cannot blindly increase the cross-sectional flexural rigidity, and at the same time, we should also consider the ease of opening the clamping mouth. Therefore, it is also necessary to carry out an adaptive matching design for the height dimensions of the two side walls 2. Generally, the height dimensions of the two side walls are increased to increase the height dimension of the entire busbar. The usual design goal is that after increasing the cross-sectional flexural rigidity by 50%, the opening force of the clamping mouth is basically not increased. The structural dimensions of the cavity hole 4 and the overall height dimension can be optimized through model establishment and simulation analysis to ensure the cross-sectional flexural rigidity of the busbar along the vertical line direction, ensure the levelness of the contact wire along the line direction, and the change in the opening force of the clamping mouth is small and within a reasonable range.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the scope of its protection. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent replacements to the specific implementation manners of the present invention, but these changes, modifications or equivalent replacements are all within the scope of the protection of the pending claims of the present invention.

Claims

1. A high bending stiffness busbar, characterized in that: The invention comprises a top plate (1) and two side walls (2) arranged on a side plate surface of the top plate (1); a rib plate (3) is arranged between the two side walls (2); the rib plate (3), the top plate (1) and the inner wall surfaces of the two side walls (2) form a cavity hole (4); the cross section of the cavity hole (4) is waist-shaped, and the two ends of the waist are semicircular arcs, and the two side edges are parallel and are both arc segments; the cavity hole (4) is stacked about a first plane, wherein the first plane is a symmetric plane of the two side wall (2) bodies.

2. A high bending stiffness busbar according to claim 1, characterized in that: The width d of the cavity hole (4) is 0.7W-0.75W, wherein W is the distance between the outer walls of the two side walls (2).

3. A high bending stiffness busbar according to claim 1, characterized in that: The radial spacing h between the two sides of the cavity hole (4) is 0.4H-0.5H, wherein H is the distance between the other side plate surface line of the top plate (1) and the plate surface line of the rib plate (3) away from the top plate (1) on the first plane.

4. A high bending stiffness busbar according to claim 3, characterized in that: On the first plane, the cavity hole (4) is located at the exact center between the plate surface line on the other side of the top plate (1) and the plate surface line of the rib plate (3) away from the top plate (1).

5. The high bending stiffness busbar according to claim 1, characterized in that: The cavity hole (4) is arched toward the top plate (1).

6. The high bending stiffness busbar according to claim 1, characterized in that: The cavity hole (4) and the rib plate (3) are both long straight structures arranged along the length direction of the high bending stiffness busbar.

7. The high bending stiffness busbar according to claim 1, characterized in that: The cross section of the rib plate (3) is in the shape of an isosceles trapezoid with the top edge close to the top plate (1) and the plate surface line away from the top plate (1).

8. The high bending stiffness busbar according to claim 1, characterized in that: The other side plate surface of the top plate (1) is a plane parallel to the length direction of the high bending stiffness busbar.

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