Busbar suspension wire clamp

Abstract

A busbar suspension wire clamp comprises a left wire clamp body, a right wire clamp body, a U-shaped liner and a connecting bolt pair, the left wire clamp body and the right wire clamp body are oppositely arranged, each of the left wire clamp body and the right wire clamp body comprises a connecting part at the upper end and a clamping part at the lower end, the connecting parts are fixedly connected together through a fastening bolt pair, and the connecting parts are provided with step holes; the connecting bolt pair is inserted into the stepped hole; busbar clamping grooves are symmetrically formed in the opposite faces of the clamping part in the line direction, a plurality of first U-shaped grooves or first U-shaped bosses are arranged in the busbar clamping grooves in the direction perpendicular to the line direction, and a plurality of second U-shaped bosses or second U-shaped grooves are arranged on the outer surface of the U-shaped gasket. The first U-shaped groove is matched with the second U-shaped boss, and the first U-shaped boss is matched with the second U-shaped groove; the U-shaped gasket is embedded in the busbar clamping groove, the second U-shaped boss is embedded in the corresponding first U-shaped groove, or the first U-shaped boss is embedded in the corresponding second U-shaped groove, and the U-shaped gasket is fixed in the busbar clamping groove.

Description

Technical Field

[0001] This utility model belongs to the technical field of rigid suspension power supply equipment for urban rail transit, and in particular relates to a busbar suspension clamp. Background Technology

[0002] The closest existing technology to this utility model is the rigid suspension contact network busbar positioning clamp (CN204020604U), which includes two symmetrically arranged clamp bodies. Nylon pads are embedded in the clamp heads (busbar clamping grooves) of both clamp bodies. The nylon pads have nylon protrusions at the contact points with the busbar. These protrusions effectively protect the lower and side contact surfaces of the busbar, preventing surface damage. However, they do not protect the top surface of the busbar, potentially causing it to jam. Furthermore, the nylon pads are fixed to the clamp bodies by elastic cylindrical pins, resulting in a separate structure. This not only complicates the installation process and increases production costs, but also reduces the reliability of the nylon pad connection. Summary of the Invention

[0003] This utility model provides a busbar suspension clamp to overcome the shortcomings of the prior art.

[0004] The technical solution adopted by this utility model is: a busbar suspension clamp, including a left clamp body, a right clamp body, a U-shaped gasket, and a connecting bolt pair arranged opposite to each other. Both the left and right clamp bodies include an upper connecting portion and a lower clamping portion. The connecting parts are fixed together by fastening bolt pairs, and the inner end face of the connecting parts is surrounded by arc-shaped grooves to form a stepped hole that is smaller at the top and larger at the bottom. The connecting bolt pairs are inserted into the stepped hole. The clamping parts are symmetrically provided with busbar clamping grooves along the line direction on opposite surfaces. The busbar clamping grooves have a number of first U-shaped grooves or first U-shaped bosses perpendicular to the line direction. The outer surface of the U-shaped gasket has a number of second U-shaped bosses or second U-shaped grooves. The first U-shaped grooves are adapted to the second U-shaped bosses, and the first U-shaped bosses are adapted to the second U-shaped grooves. The U-shaped gasket is embedded in the busbar clamping groove, and the second U-shaped bosses are embedded in the corresponding first U-shaped grooves or the first U-shaped bosses are embedded in the corresponding second U-shaped grooves, thus fixing the U-shaped gasket in the busbar clamping groove.

[0005] The cross-sectional shape of the first U-shaped groove and the second U-shaped groove is a dovetail shape with a small opening and a large bottom. The cross-sectional shape of the first U-shaped boss and the second U-shaped boss are adapted to the dovetail shape.

[0006] The ends of the first U-shaped groove and the second U-shaped groove are both inclined surfaces with the bottom sloping towards the center of the clamping part, and the ends of the first U-shaped boss and the second U-shaped boss are adapted to the inclined surfaces.

[0007] The included angle α between the swallowtail shape and the first inclined plane is greater than or equal to 30°.

[0008] The bottom wall of the U-shaped pad is provided with a limiting platform, and the bottom wall of the busbar clamping groove is provided with a limiting hole, and the limiting platform is embedded in the limiting hole.

[0009] The connecting part has two seams that are offset on both sides of the center of the clamping part.

[0010] A reinforcing rib is provided between the outer side of the connecting part and the top of the clamping part.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The nylon pad of this utility model is formed by injection molding in the manifold clamping groove and becomes an integral structure with the wire clamp body. It is positioned by several inverted conical grooves or limiting holes, which makes the connection reliability of the nylon pad higher and reduces the production cost.

[0013] 2. The three surfaces of the U-shaped nylon gasket that come into contact with the busbar are all inwardly convex arc surfaces, which fit the actual working state of the busbar and further improve the flexibility of the busbar to move due to thermal expansion and contraction. This avoids the safety hazard of the busbar getting stuck due to the top surface of the busbar and the clamp body biting each other in special sections.

[0014] 3. This utility model further improves the overall bending resistance of the wire clamp by offsetting the joint of the left and right wire clamp body connecting parts to the center of the clamping part. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0016] Figure 2 This is a schematic diagram of the left and right wire clamp body structure of Embodiment 1 of this utility model;

[0017] Figure 3 This is a cross-sectional view of the end of the first U-shaped groove in Embodiment 1 of this utility model;

[0018] Figure 4 This is a cross-sectional view of the first U-shaped groove in Embodiment 1 of this utility model;

[0019] Figure 5 This is a schematic diagram of the U-shaped gasket structure of Embodiment 1 of this utility model;

[0020] Figure 6 This is a schematic diagram of the left and right wire clamp body structure of Embodiment 1 of this utility model;

[0021] Figure 7This is a schematic diagram of the U-shaped gasket structure of Embodiment 1 of this utility model;

[0022] Figure 8 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0023] Figure 9 This is a schematic diagram of the left and right wire clamp body structure of Embodiment 2 of this utility model;

[0024] Figure 10 This is a schematic diagram of the U-shaped gasket structure in Embodiment 2 of this utility model;

[0025] Figure 11 This is a schematic diagram of the structure of Embodiment 3 of this utility model. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] Example 1, see Figure 1 , 2 3, 4, 5, 6, 7.

[0028] A busbar suspension clamp includes a left clamp body 1, a right clamp body 2, a U-shaped gasket 3, and a connecting bolt pair 4 arranged opposite to each other. Both the left clamp body 1 and the right clamp body 2 include an upper connecting portion and a lower clamping portion. The connecting parts are fixed together by fastening bolt pairs 5, and the inner end face of the connecting parts is surrounded by arc-shaped grooves to form a stepped hole 11 that is smaller at the top and larger at the bottom. The connecting bolt pairs 4 are inserted into the stepped hole 11. The clamping parts are symmetrically provided with busbar clamping grooves 6 along the line direction on opposite surfaces. The busbar clamping grooves 6 have a number of first U-shaped grooves 6-1 perpendicular to the line direction. The outer surface of the U-shaped pad 3 has a number of second U-shaped protrusions 3-1, and the first U-shaped grooves 6-1 are adapted to the second U-shaped protrusions 3-1. The U-shaped pad 3 is embedded in the busbar clamping groove 6, and the second U-shaped protrusions 3-1 are embedded in the corresponding first U-shaped grooves 6-1 to fix the U-shaped pad 3 in the busbar clamping groove 6.

[0029] The U-shaped gasket 3 is preferably a nylon gasket, and the three surfaces of the nylon gasket that contact the busbar are all inwardly convex arc surfaces. This not only further improves the flexibility of the busbar due to thermal expansion and contraction, but also ensures that it can fit snugly against the busbar when it tilts or bends. The nylon gasket is injection molded into the busbar clamping groove, making the two integral.

[0030] To further improve the reliability of the connection between the nylon pad and the clamp body, the first U-shaped groove 6-1 has a dovetail shape with a small opening and a large bottom, and the cross-sectional shape of the second U-shaped boss 3-1 is adapted to the dovetail shape. The end of the first U-shaped groove 6-1 is a slope 6-4 with its bottom inclined towards the center of the clamping part, and the end of the second U-shaped boss 3-1 is adapted to the slope. The included angle α between the dovetail shape and the first slope 6-4 is greater than or equal to 30°.

[0031] To improve the overall strength of the clamp, a reinforcing rib 7 is provided between the outer side of the connecting part and the top of the clamping part.

[0032] To improve installation efficiency, both the left clamp body 1 and the right clamp body 2 have raised edges 9 on their upper outer sides to restrict the rotation of the nuts when the fastening bolt pair 5 is installed.

[0033] Example 2, see Figure 8 , 9 10.

[0034] The difference from Embodiment 1 is that the busbar clamping groove has a plurality of first U-shaped protrusions 6-2 surrounding the top wall, bottom wall, and side wall; the outer surface of the U-shaped pad 3 has a plurality of second U-shaped grooves 3-2 surrounding the top wall, bottom wall, and side wall, and the first U-shaped protrusions 6-2 and second U-shaped grooves 3-2 are adapted to each other; the busbar clamping groove 6 has a plurality of first U-shaped protrusions 6-2 perpendicular to the direction along the line; the outer surface of the U-shaped pad 3 has a plurality of second U-shaped grooves 3-2, and the first U-shaped protrusions 6-2... The U-shaped pad 3 is fitted into the busbar clamping groove 6, and the first U-shaped protrusion 6-2 is embedded into the corresponding second U-shaped groove 3-2, thus fixing the U-shaped pad 3 in the busbar clamping groove 6. The bottom or top wall of the U-shaped pad 3 is provided with a limiting platform 3-3, and the bottom or top wall of the busbar clamping groove 6 is provided with a limiting hole 6-3. The U-shaped pad 3 is fitted into the busbar clamping groove 6, and the first U-shaped protrusion 6-2 is embedded into the corresponding second U-shaped groove 3-2, and the limiting platform 3-3 is embedded into the limiting hole 6-3.

[0035] Preferably, there are two limiting holes 6-3, and there are also two corresponding limiting platforms 3-3.

[0036] The second U-shaped groove 3-2 has a dovetail shape with a small opening and a large bottom, and the cross-sectional shape of the first U-shaped boss 6-2 is adapted to the dovetail shape. The end of the second U-shaped groove 3-2 is a sloped surface 6-4 with its bottom inclined towards the center of the clamping part, and the ends of the first U-shaped boss 6-2 are all adapted to the sloped surface. The included angle α between the dovetail shape and the first sloped surface 6-4 is greater than or equal to 30°.

[0037] Example 3, see Figure 11 .

[0038] The basic structure is the same as that of Embodiment 1 or Embodiment 2, except that the joint 8 of the connecting part is two and is offset on both sides of the center of the clamping part, which improves the overall bending resistance of the busbar suspension clamp.

[0039] This utility model's wire clamp body is made of cast copper alloy. A nylon gasket is directly molded into the wire clamp body using injection molding, eliminating the need for riveting and reducing the overall weight and cost of the wire clamp. Simultaneously, the U-shaped nylon gasket prevents the busbar top surface from interlocking with the wire clamp body in specific sections, thus avoiding the safety hazard of busbar jamming. In use, this utility model is vertically connected to the underside of the insulator using the connecting bolt set 4.

[0040] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Therefore, all equivalent variations made based on the content described in the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A busbar suspension clamp, comprising oppositely arranged left clamp body (1), right clamp body (2) and U-shaped gasket (3), connecting bolt pair (4), the left clamp body (1) and the right clamp body (2) each comprise a connecting part at the upper end and a clamping part at the lower end, the connecting parts are fixedly connected together by the fastening bolt pair (5), and an upper small and lower large step hole (11) is formed on the inner end face of the connecting part by surrounding through the oppositely arranged arc-shaped grooves, and the connecting bolt pair (4) is inserted and mounted in the step hole (11); a busbar clamping groove (6) is symmetrically provided on the opposite faces of the clamping part in the direction of the line, characterized in that: The bus bar clamping groove (6) has a plurality of first U-shaped grooves (6-1) or first U-shaped bosses (6-2) perpendicular to the wire direction, the U-shaped gasket (3) has a plurality of second U-shaped bosses (3-1) or second U-shaped grooves (3-2) on the outer surface, and the first U-shaped groove (6-1) is matched with the second U-shaped boss (3-1), and the first U-shaped boss (6-2) is matched with the second U-shaped groove (3-2); the U-shaped gasket (3) is embedded in the bus bar clamping groove (6), and the second U-shaped boss (3-1) is embedded in the corresponding first U-shaped groove (6-1) or the first U-shaped boss (6-2) is embedded in the corresponding second U-shaped groove (3-2), so as to fix the U-shaped gasket (3) in the bus bar clamping groove (6).

2. A busway hanger clamp according to Claim 1, wherein: The cross-sectional shape of the first U-shaped groove (6-1) and the second U-shaped groove (3-2) is dovetail-shaped with a small notch and a large groove bottom, and the cross-sectional shape of the first U-shaped boss (6-2) and the second U-shaped boss (3-1) is matched with the dovetail shape.

3. A busway hanger clamp according to Claim 2, wherein: The end of the first U-shaped groove (6-1) and the second U-shaped groove (3-2) is a slope (6-4) with the bottom inclined to the center of the clamping part, and the end of the first U-shaped boss (6-2) and the second U-shaped boss (3-1) is matched with the slope.

4. A busbar hanger according to claim 2 or 3, wherein: The included angle α of the dovetail shape and the first slope (6-4) is greater than or equal to 30°.

5. A busway hanger clamp according to claim 1 wherein: The U-shaped gasket (3) is provided with a limiting table (3-3) on the bottom wall, and the bus bar clamping groove (6) is provided with a limiting hole (6-3) on the bottom wall, and the limiting table (3-3) is embedded in the limiting hole (6-3).

6. A busway hanger clamp according to Claim 1, characterized in that: The joint (8) of the connecting part is two and offset on both sides of the center of the clamping part.

7. A busway hanger clamp according to claim 1 wherein: The connecting part is provided with a reinforcing rib (7) between the outside and the top of the clamping part.

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