Contact wire clamp

Abstract

The invention discloses a contact wire clamp, which comprises a pair of clamping plates, one ends of the clamping plates are connected, and the other ends of the clamping plates are freely opened and closed; the limiting mechanism is used for limiting the opening degree of the free ends of the clamping plates and comprises a pull rod for connecting the two clamping plates in series, one end of the pull rod is hinged to a cam which enables the clamping plates to be close to each other by rotating and pulling the pull rod, and the cam is provided with a pull handle which can drive the cam to rotate and be locked; the contact wire clamp is simple in structure, adopts the cam and the pull rod to clamp the contact wire, and is convenient to disassemble and assemble.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of electrified rail transit, in particular to the field of catenary, and specifically to the field of contact wire clamp. BACKGROUND

[0002] The contact wire clamp is used for clamping the contact wire and positioning the contact wire height by connecting with the dropper. The existing contact wire clamp connects two independent clamping plates by fasteners to clamp the contact wire, which has a complex structure and is inconvenient to install and disassemble. SUMMARY

[0003] In order to solve the problems in the prior art, the present application provides a contact wire clamp with simple structure and convenient clamping and loosening. The technical scheme adopted by the present application is as follows:

[0004] A contact wire clamp comprises a pair of clamping plates, one end of the pair of clamping plates is connected, and the other end is free to open and close; a limiting mechanism is used for limiting the opening degree of the free end of the pair of clamping plates, comprising a pull rod connecting two clamping plates in series, a cam is hinged at one end of the pull rod, the cam can pull the pull rod to make the pair of clamping plates close by rotating, and a pull handle is arranged on the cam to drive the cam to rotate and lock.

[0005] Further, a gasket is arranged between the cam and the clamping plate.

[0006] Further, the pair of clamping plates is integrally bent.

[0007] Further, the pair of clamping plates is hinged together.

[0008] Further, the pair of clamping plates is elastically connected.

[0009] Further, a hook is arranged on the pull handle to be clamped on the pair of clamping plates to achieve locking.

[0010] Further, a clamping part is arranged on the clamping plate for locking the pull handle.

[0011] Further, it further comprises a wire pressing pipe connected with the ball joint of the clamping plate for connecting the dropper.

[0012] The contact wire clamp has a simple structure, and the cam and the pull rod are used to clamp the contact wire, which makes it convenient to disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of the contact wire clamp embodiment 1;

[0014] Figure 2 It is a structure schematic view of the contact wire clamp embodiment 2;

[0015] Figure 3This is a schematic diagram of embodiment 1 of the pull handle locking structure;

[0016] Figure 4 This is a schematic diagram of embodiment 2 of the pull handle locking structure;

[0017] Figure 5 This is a schematic diagram showing the state of the contact wire clamp holding the contact wire in Example 1. Detailed Implementation

[0018] To better understand the concept of this invention, further detailed explanations are provided below in conjunction with the accompanying drawings and specific technical solutions.

[0019] like Figure 1 The contact wire clamp shown includes a pair of clamping plates 1, which are formed by bending a sheet metal part as a whole. In the free state, the free ends of the two clamping plates 1 are separated. The contact wire is clamped and fixed by bringing the free ends of the two clamping plates 1 together.

[0020] Therefore, in order to bring the free ends of the two clamping plates 1 together to clamp the contact wire, a limiting mechanism is set between the two clamping plates 1. The limiting mechanism includes a pull rod 2, at least one end of which freely passes through one of the clamping plates 1. A cam 3 is hinged to the free end of the pull rod 2, and a pull handle 4 is provided on the cam 3. When the pull handle 4 drives the cam 3 to rotate around the hinge, the cam 3 pulls the pull rod 2 to bring the free ends of the two clamping plates 1 together to form a clamping state.

[0021] When Figure 5 After the two clamping plates 1 clamp the contact wire A, in order to maintain the clamping state, a hook 6 is provided on the pull handle 4, so that the hook 6 is engaged with the connection part of the two clamping plates 1 to lock the pull handle 4, thereby keeping the clamping state from loosening.

[0022] To reduce excessive stress on the surface of the clamping plate 1 caused by the cam 3, a shim 5 is provided between the cam 3 and the clamping plate 1 to increase the contact area. Figure 1 As shown, the gasket 5 is sleeved on the free end of the pull rod 2, with one end face in contact with the plane of the clamping plate 1, and the other side is provided with a groove 12 that matches the cam 3 to accommodate the cam 3.

[0023] To facilitate the connection between the clamp and the dropper and to allow the clamp a certain degree of freedom on the dropper, a pressure tube 8 for connecting the dropper is also provided on the clamp. One end of the pressure tube 8 has a ball head 10 that connects to the ball joint of the clamp plate 1, allowing for freedom between the clamp and the pressure tube 8. In this embodiment, mounting holes 9 are made at the bends of the two clamp plates 1 to place the ball head 10 between the clamp plates 1, and tongues 11 are provided on each clamp plate 1 to support and limit the ball head 10, keeping it in a fixed position. When connecting the dropper, such as... Figure 5 As shown, the dropper B is inserted into the crimping tube 8, and the crimping tube 8 is squeezed by crimping pliers to deform it and clamp and fix the dropper.

[0024] like Figure 2 The diagram shows another embodiment based on the inventive concept, still including two clamping plates 1. These two clamping plates 1 are hinged together at one end, similar to a hinge mechanism, allowing the free end to open and close freely. When clamping the contact wire, a limiting mechanism as shown in Embodiment 1 is used to keep the opening of the free end within a fixed range, thereby achieving the clamping of the contact wire. The specific limiting mechanism and its working principle are described in Embodiment 1 and will not be repeated here.

[0025] As can be seen from the above two embodiments, the core concept of this technical solution is that the two clamping plates 1 are connected at one end and can be opened and closed freely at the other end. The opening degree is limited by the limiting mechanism composed of cam and pull rod, thereby forming a clamping state for the contact line.

[0026] Based on the above structure, to facilitate installation, the connection between the two clamping plates 1 can be made elastically connected. In the structure of Embodiment 1, when the connection between the two clamping plates 1 is elastic, when removing the wire clamp, it is only necessary to loosen the limiting mechanism, and the free ends of the two clamping plates 1 can automatically open and release the clamp on the contact wire. In Embodiment 2, a torsion spring can be provided at the hinge, or an elastic element such as a spring or rubber pad can be provided between the two clamping plates 1, so that the free ends of the two clamping plates 1 remain separated in the free state. This facilitates installation, and when removing the wire clamp, it is only necessary to loosen the limiting mechanism, and the free ends of the two clamping plates 1 can automatically open and release the clamp on the contact wire.

[0027] In addition to the locking structure provided by the hook 6 and pull handle 4 in Embodiment 1, we can also refer to... Figure 3 As shown, by providing a latching part 7 formed by a tongue-cutting plate on the clamping plate 1, the pull handle 4 is locked by being inserted under the tongue-cutting plate, or as... Figure 4 The pull handle 4 is locked by setting a slot in the clamping plate 1 to form a locking part 7 and a buckle 13 on the pull handle 4, and the buckle 13 is locked into the slot. Not all locking methods in the prior art can be shown here. Other conventional locking methods used by those skilled in the art to achieve locking should also be regarded as equivalent technical features.

[0028] Similarly, besides the method of connecting the hanger via the pressure tube 8 with a ball head as described in this embodiment, other methods can also be used such as... Figure 2 The connection method shown is to connect the dropper string by setting the dropper ring 14 on the wire clamp, or to connect the dropper string by bolt crimping, which are conventional connection methods in existing wire clamps.

Claims

1. A contact wire clamp, characterized in that: include, A pair of clamps (1), one end of which is connected and the other end is freely open and closed; The limiting mechanism is used to limit the opening of the free ends of the pair of clamps (1), including a pull rod (2) that connects the two clamps (1) in series. A cam (3) is hinged at one end of the pull rod (2) to bring the pair of clamps (1) closer together by rotating the pull rod (2). A handle (4) is provided on the cam (3) to drive the cam (3) to rotate and lock.

2. The contact wire clamp according to claim 1, characterized in that: A gasket (5) is provided between the cam (3) and the clamp (1).

3. A contact wire clamp according to claim 1, characterized in that: The clamps (1) are formed by bending them as a whole.

4. A contact wire clamp according to claim 1, characterized in that: The two clamps (1) are hinged together.

5. A contact wire clamp according to claim 1, 3, or 4, characterized in that: This pair of clamps (1) are elastically connected.

6. A contact wire clamp according to claim 1, characterized in that: A hook (6) is provided on the handle (4) so ​​as to lock it onto the pair of clamps (1).

7. A contact wire clamp according to claim 1, characterized in that: A locking part (7) is provided on the clamp (1) for locking the pull handle (4).

8. A contact wire clamp according to claim 1, characterized in that: It also includes a pressure tube (8) that is connected to the ball joint of the clamp (1) for connecting the dropper.

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