Strain clamp

Abstract

The utility model discloses a strain clamp, which relates to the technical field of electric power fittings and comprises a strain clamp body, a plurality of U-shaped bolts are arranged on the strain clamp body, two ends of each U-shaped bolt are respectively in threaded connection with nuts, and the strain clamp further comprises elastic telescopic assemblies which are arranged on the strain clamp body and are in one-to-one correspondence with the U-shaped bolts. The elastic telescopic assembly is located between the two ends of the U-shaped bolt, a clamping part is fixed to the nut, and the clamping part is connected with the elastic telescopic assembly in a clamped mode. The nut can be effectively prevented from loosening.

Description

Technical Field

[0001] This utility model relates to the field of power fittings technology, and in particular to a tension clamp. Background Technology

[0002] Tension clamps are electrical fittings used to fix conductors to withstand conductor tension and to hang conductors on insulator strings or towers; tension clamps are mainly used for cornering, splicing, and termination connections.

[0003] Bolt-type tension clamps (NLDs) are a commonly used type of tension clamp. They achieve a secure clamping and fixation of the conductor through the coordinated action of the clamp body, U-bolt, pressure block, flat washer, elastic washer, and nut. However, in actual operating environments, the conductor experiences wind-induced vibrations (frequency 15-50Hz) and galloping, causing periodic vibrations in the clamp (peak acceleration can reach 12-18g). Although the flat washer and elastic washer provide some protection against loosening of the nut, it may still loosen over time due to vibration and thermal expansion and contraction. Once the nut loosens, the conductor cannot be effectively clamped and fixed, which could lead to conductor detachment and seriously threaten the stability and safety of power transmission.

[0004] Therefore, it is necessary to develop a tension clamp to address the aforementioned defects. Utility Model Content

[0005] The purpose of this invention is to provide a tension clamp that can effectively prevent the nut from loosening.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This utility model discloses a tension clamp, including a tension clamp body, a plurality of U-bolts on the tension clamp body, nuts threaded to both ends of the U-bolts, and an elastic telescopic component installed on the tension clamp body and corresponding to each U-bolt. The elastic telescopic component is located between the two ends of the U-bolts, and a snap-fit ​​component is fixed on the nut, the snap-fit ​​component snapping into the elastic telescopic component.

[0008] Optionally, the elastic telescopic component includes a slider and a compression spring. A fixing block is fixed on the tension clamp body. A through hole is provided on the fixing block. The slider is slidably connected to both ends of the through hole. A locking tooth is provided at one end of the slider near the locking component. The locking tooth engages with the locking component. The compression spring is disposed in the through hole. One end of the compression spring abuts against one of the sliders, and the other end of the compression spring abuts against the other slider.

[0009] Optionally, it also includes an operating lever. The slider has a strip-shaped through groove, the length direction of which is consistent with the central axis of the nut. The operating lever passes through the strip-shaped through groove and can slide along the length direction of the strip-shaped through groove. The side wall of the fixing block has a first guide groove communicating with the through hole. The length direction of the first guide groove is set along the sliding direction of the slider. The end of the first guide groove away from the locking tooth is connected to one end of a second guide groove, the length direction of which is set along the length direction of the strip-shaped through groove. The operating lever passes through the fixing block and slides with the first guide groove and the second guide groove. The end of the second guide groove away from the first guide groove is connected to a locking groove for engaging with the operating lever. The locking groove is located on the side of the second guide groove near the locking tooth.

[0010] Optionally, the snap-fit ​​component is a circular plate, which is coaxially arranged with the nut. The circular plate is fixedly connected to one end of the nut near the tension clamp body. The circular plate has a through hole that matches the U-bolt. The circular plate has multiple toothed grooves on its circumference, which snap with the snap-fit ​​teeth.

[0011] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0012] The anti-loosening performance is achieved through the locking teeth of the elastic telescopic component and the locking parts, which effectively prevents the nut from loosening under long-term vibration environment, greatly improving the stability of wire fixing and ensuring the safety and stability of power transmission.

[0013] The operation is convenient. The design of the operating lever, guide groove, and card slot allows the operator to easily control the engagement and disengagement of the locking teeth and locking components, making it easy to adjust and repair the wires when needed. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention when connected to a wire;

[0016] Figure 2 This is a three-dimensional structural diagram of the elastic telescopic component and the snap-fit ​​component when they are not snapped together.

[0017] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0018] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0019] Figure 5 This is a three-dimensional structural diagram of the elastic telescopic component and the snap-fit ​​component when they are engaged.

[0020] Figure 6 for Figure 5 Enlarged structural diagram at point C;

[0021] Figure 7 This is a three-dimensional structural diagram of the elastic telescopic component, the snap-fit ​​part, and the U-bolt.

[0022] Explanation of reference numerals in the attached drawings: 100, tension clamp body; 110, fixing block; 120, through hole; 130, first guide groove; 140, second guide groove; 150, slot; 200, U-bolt; 300, nut; 310, snap-fit ​​component; 320, toothed groove; 400, slider; 410, snap-fit ​​tooth; 420, strip-shaped through groove; 500, compression spring; 600, operating lever; 700, pressure block; 800, flat washer; 900, elastic washer; 1000, wire. Detailed Implementation

[0023] The core of this invention is to provide a tension clamp that can effectively prevent nuts from loosening.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In one specific embodiment of this utility model, such as Figures 1-7 As shown, the device includes a tension clamp body 100, on which a plurality of U-bolts 200 are provided. Nuts 300 are threadedly connected to both ends of the U-bolts 200. The device also includes an elastic telescopic component installed on the tension clamp body 100 and corresponding to each of the U-bolts 200. The elastic telescopic component is located between the two ends of the U-bolts 200. A snap-fit ​​component 310 is fixed on the nut 300 and snaps into the elastic telescopic component.

[0027] In one specific embodiment of this utility model, such as Figures 2-7 As shown, the elastic telescopic assembly includes a slider 400 and a compression spring 500. A fixing block 110 (which can be integrally cast) is fixed on the tension clamp body 100. A through hole 120 is provided on the fixing block 110, and sliders 400 are slidably connected to both ends of the through hole 120. A locking tooth 410 is provided at one end of the slider 400 near the locking component 310, and the locking tooth 410 engages with the locking component 310. The compression spring 500 is disposed in the through hole 120, with one end of the compression spring 500 abutting against one slider 400 and the other end of the compression spring 500 abutting against another slider 400. In addition, the end of the compression spring 500 can be welded or glued to the slider 400.

[0028] In one specific embodiment of this utility model, such as Figures 2-7 As shown, it also includes an operating lever 600. A strip-shaped through groove 420 is provided on the slider 400. The length direction of the strip-shaped through groove 420 is consistent with the central axis direction of the nut 300. The operating lever 600 passes through the strip-shaped through groove 420 and can slide along the length direction of the strip-shaped through groove 420. A first guide groove 130 communicating with the through hole 120 is provided on the side wall of the fixing block 110. The length direction of the first guide groove 130 is set along the sliding direction of the slider 400. The end of the first guide groove 130 away from the locking tooth 410 is connected to one end of the second guide groove 140. The length direction of the second guide groove 140 is set along the length direction of the strip-shaped through groove 420. The operating lever 600 passes through the fixing block 110 and slides in cooperation with the first guide groove 130 and the second guide groove 140. The end of the second guide groove 140 away from the first guide groove 130 is connected to a locking groove 150 for locking with the operating lever 600. The locking groove 150 is located on the side of the second guide groove 140 close to the locking tooth 410. With the above structure, the snap-fit ​​teeth 410 can be controlled to enter the through hole 120, so that the nut 300 can rotate on the U-bolt 200.

[0029] In one specific embodiment of this utility model, such as Figures 2-7 As shown, the snap-fit ​​component 310 is a circular plate, which is coaxially arranged with the nut 300. The circular plate is fixedly connected to one end of the nut 300 near the tension clamp body 100. The circular plate has through holes that match the U-bolt 200. Multiple toothed grooves 320 are provided on the periphery of the circular plate, and the toothed grooves 320 snap-fit ​​with the snap-fit ​​teeth 410.

[0030] The usage process of this utility model of a tension clamp:

[0031] The clamping and fixing of wire 1000, such as Figure 3 and 4As shown, at this time, the operating lever 600 is engaged with the slot 150, and the engaging teeth 410 are located within the through hole 120; as Figures 1 to 4 As shown, the conductor 1000 is placed in the groove of the tension clamp body 100, the pressure block 700 is placed in the groove of the tension clamp body 100 and presses down on the conductor 1000, the U-bolt 200 is passed through the tension clamp body 100 and presses down on the pressure block 700, a flat washer 800 and an elastic washer 900 are fitted on the end of the U-bolt 200, and the nut 300 is screwed on.

[0032] The elastic telescopic component engages with the locking component 310. Clamp the end of the operating rod 600 with your hand or pliers and move the operating rod 600 to separate it from the locking groove 150. Continue operating the operating rod 600 to slide it along the second guide groove 140 and into the first guide groove 130. At this time, under the elastic force of the compression spring 500, the slider 400 slides towards the locking component 310 and drives the operating rod 600 to slide along the first guide groove 130. The locking teeth 410 finally abut against the locking component 310. If at this time, the locking teeth 410 enter the tooth groove 320 (…). Figures 5 to 7 As shown in the diagram, this completes the engagement of the nut 300 with the locking tooth 410. If, at this point, the locking tooth 410 is abutting against the circumference of the circular plate, meaning it has not entered the tooth groove 320, then fine-tune the nut 300 until the locking tooth 410 enters the tooth groove 320. The locking tooth 410 and tooth groove 320 are in the engaged state, restricting the rotation of the nut 300 and ensuring it remains loose. Once the locking tooth 410 is in the tooth groove 320, the operating lever 600 can be removed to prevent loss.

[0033] For adjustment or maintenance, when the wire 1000 needs adjustment or maintenance and the nut 300 needs to be tightened, the operating lever 600 is pushed. The operating lever 600 moves along the first guide groove 130 and the second guide groove 140. When the operating lever 600 moves to one end of the second guide groove 140 and enters the locking slot 150, the operating lever 600 is locked. Figure 3 and 4 As shown), during the above process, the operating lever 600 drives the slider 400 to overcome the elastic force of the compression spring 500, causing the locking tooth 410 to disengage from the tooth groove 320, thereby releasing the rotation restriction on the nut 300. At this time, the nut 300 can be easily rotated to adjust or repair the wire 1000. After the adjustment is completed, the operating lever 600 is operated in the opposite direction, causing the operating lever 600 to disengage from the slot 150 and enter the first guide groove 130. Under the action of the compression spring 500, the slider 400 resets, and the locking tooth 410 re-engages with the tooth groove 320. Figures 5 to 7 (As shown).

[0034] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably, and the embodiments can be combined with each other. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0035] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A tension clamp, comprising a tension clamp body (100), wherein a plurality of U-bolts (200) are disposed on the tension clamp body (100), and nuts (300) are threadedly connected to both ends of the U-bolts (200), characterized in that, It also includes an elastic telescopic component installed on the tension clamp body (100) and corresponding one-to-one with the U-bolt (200). The elastic telescopic component is located between the two ends of the U-bolt (200). A snap-fit ​​component (310) is fixed on the nut (300) and snaps into the elastic telescopic component.

2. The tension clamp according to claim 1, characterized in that: The elastic telescopic component includes a slider (400) and a compression spring (500). A fixing block (110) is fixed on the tension clamp body (100). A through hole (120) is provided on the fixing block (110). The slider (400) is slidably connected to both ends of the through hole (120). A locking tooth (410) is provided at one end of the slider (400) near the locking component (310). The locking tooth (410) locks with the locking component (310). The compression spring (500) is disposed in the through hole (120). One end of the compression spring (500) abuts against one of the sliders (400), and the other end of the compression spring (500) abuts against another slider (400).

3. The tension clamp according to claim 2, characterized in that: It also includes an operating lever (600), and the slider (400) has a strip-shaped through groove (420) with the length direction of the strip-shaped through groove (420) aligned with the central axis of the nut (300). The operating lever (600) passes through the strip-shaped through groove (420) and can slide along the length direction of the strip-shaped through groove (420). The side wall of the fixing block (110) has a first guide groove (130) communicating with the through hole (120). The length direction of the first guide groove (130) is along the sliding direction of the slider (400), and the first guide groove (130) is away from the locking teeth. One end of (410) is connected to one end of the second guide groove (140), the length direction of the second guide groove (140) is set along the length direction of the strip through groove (420); the operating rod (600) passes through the fixing block (110) and slides with the first guide groove (130) and the second guide groove (140); the end of the second guide groove (140) away from the first guide groove (130) is connected to a slot (150) for engaging with the operating rod (600), the slot (150) is located on the side of the second guide groove (140) near the engaging tooth (410).

4. The tension clamp according to claim 2 or 3, characterized in that: The snap-fit ​​component (310) is a circular plate, which is coaxially arranged with the nut (300). The circular plate and the nut (300) are fixedly connected at one end near the tension clamp body (100). The circular plate has a through hole that matches the U-bolt (200). The circular plate has multiple toothed grooves (320) on its circumference, which snap with the snap-fit ​​teeth (410).

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