Terminal array that is not easily loosened

Abstract

The application discloses a non-loose terminal row. The application lacks effective measures to prevent the terminal row from loosening, which may cause the open circuit of the current transformer secondary circuit, the refusal or misoperation of the relay protection device, the power equipment power-off, fire and even explosion accidents. The application comprises a terminal row body (4), plastic clips (9), outer side wiring holes (6), inner side wiring holes (5) and short-circuit holes (7), linkage fastening devices for fastening the wiring posts are respectively fixed at the inner side wiring holes and the outer side wiring holes of the terminal row body; the linkage fastening devices comprise right-hand screws (1), left-hand screws and linkage devices for driving the right-hand screws (2) and the left-hand screws to rotate in the same direction. The application is used as the non-loose terminal row.

Description

Technical Field

[0001] This invention relates to a terminal block that is not easily loosened. Background Technology

[0002] Terminal blocks are an irreplaceable component widely used in relay protection, thermal instrumentation, and industrial automation, serving to transmit signals such as current, voltage, and control. The reliability of terminal block wiring directly affects the safe operation of power electronic equipment. For a long time, due to vibration, temperature changes, and human maintenance, loosening of terminal blocks has frequently occurred. Loosening of wiring in critical circuits can lead to equipment tripping, protection malfunctions or failures to operate, equipment fires, and even major equipment damage or explosions, seriously endangering the safe operation of generator sets. Currently, terminal blocks are used in power systems, chemical plants, coal mines, and other enterprises. To ensure safe production, it is necessary to install terminal blocks that are not easily loosened.

[0003] Currently, due to the working characteristics of terminal blocks, there is a lack of effective measures to prevent loose wiring of terminal blocks in daily operations. This may cause open circuits in the secondary circuit of current transformers, failure or malfunction of relay protection devices, power outages, fires, and even explosions, affecting power supply safety, equipment safety, and personal safety. Summary of the Invention

[0004] The purpose of this invention is to provide a terminal block that is not easily loosened.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A terminal block that is not easily loosened comprises: a terminal block body, a plastic clip, an outer wiring hole, an inner wiring hole, and a shorting hole, wherein a linkage fastening device for fastening the terminal is fixed at the inner wiring point and the outer wiring point of the terminal block body respectively.

[0007] The aforementioned linkage fastening device includes a positive screw, a negative screw, and a linkage device that drives the positive screw and the negative screw to rotate in the same direction.

[0008] The terminal block that is not easy to loosen, the linkage device is driven gear linkage, the driven gear rod is inserted into the driven gear hole and locked in place, the driven gear rod is fixed to the top of the driven gear rod, and the driven gear meshes with the positive screw gear on the top of the positive screw and the negative screw gear on the top of the negative screw respectively.

[0009] The terminal block that is not easy to loosen, the linkage device is a linkage chain linkage, and the positive screw gear at the top of the positive screw and the negative screw gear at the top of the negative screw are driven by the linkage chain.

[0010] The terminal block that is not easily loosened has a spring fixed at the bottom of the driven gear rod, and limit pins are fixed at both ends of the spring. The limit pins are located in the cavity at the bottom of the terminal block body.

[0011] The terminal block that is not easily loosened has circular scale markings engraved around the driven gear.

[0012] The terminal block that is not easy to loosen has a fastening groove on both the positive and negative screws.

[0013] Beneficial effects:

[0014] 1. This invention achieves double fastening of the wiring by rotating the clockwise screw and the counterclockwise screw. Under the same vibration source, the clockwise and counterclockwise screws rotate in the same direction, ensuring that one screw is always automatically fastening the wiring.

[0015] 2. This invention can achieve automatic tightening of wiring by having a driven gear simultaneously mesh with a forward-rotating screw gear and a reverse-rotating screw gear, so that when one screw becomes loose, the driven gear drives another screw to rotate in the same direction.

[0016] 3. This invention can automatically tighten the wiring by using a linkage chain to engage a forward-rotating screw gear and a reverse-rotating screw gear, so that when one screw becomes loose, the chain drives another screw to rotate in the same direction.

[0017] 4. This invention monitors the looseness of terminal screws by pointing the top of the driven gear to the circular scale mark, making it convenient for personnel to inspect and handle. Attached Figure Description

[0018] Figure 1 This is a top view of the terminal block on which the driven gear is installed;

[0019] Figure 2 This is a top view of the terminal block where the linkage chain is installed;

[0020] Figure 3 This is the installation diagram of the driven gear;

[0021] Figure 4 yes Figure 3 Enlarged view of part A;

[0022] Figure 5 This is a structural schematic diagram of the driven gear and the driven gear rod;

[0023] In the diagram: 1. Forward screw; 2. Reverse screw; 3. Driven gear; 4. Terminal block body; 5. Inner wiring hole; 6. Outer wiring hole; 7. Shorting hole; 8. Driven gear hole; 9. Plastic clip; 10. Forward screw gear; 11. Reverse screw gear; 12. Linkage chain; 13. Cavity; 14. Spring; 15. Driven gear rod; 16. Limit pin. Detailed Implementation

[0024] Example 1:

[0025] A terminal block that is not easy to loosen comprises: a terminal block body 4, a plastic clip 9, an outer wiring hole 6, an inner wiring hole 5, and a shorting hole 7. A linkage fastening device for fastening the terminal is fixed at the inner wiring point and the outer wiring point of the terminal block body respectively.

[0026] The aforementioned linkage fastening device includes a positive screw 1, a negative screw, and a linkage device that drives the positive screw 2 and the negative screw to rotate in the same direction.

[0027] Example 2:

[0028] According to the terminal block that is not easy to loosen as described in Embodiment 1, the linkage device is a driven gear linkage. A driven gear rod 15 is inserted into the driven gear hole and locked in place. A driven gear 3 is fixed on the top of the driven gear rod. The driven gear meshes with the positive screw gear 10 on the top of the positive screw and the negative screw gear 11 on the top of the negative screw, respectively.

[0029] Example 3:

[0030] According to the terminal block that is not easy to loosen as described in Embodiment 1, the linkage device is a linkage chain linkage, and the positive screw gear at the top of the positive screw and the negative screw gear at the top of the negative screw are driven by the linkage chain 12.

[0031] Example 4:

[0032] According to the terminal block that is not easy to loosen as described in Embodiment 1, a spring 14 is fixed at the bottom of the driven gear rod, and limit pins 16 are fixed at both ends of the spring. The limit pins are located in the cavity at the bottom of the terminal block body.

[0033] Example 5:

[0034] According to the terminal block that is not easily loosened as described in Embodiment 1, the driven gear is engraved with circular scale lines.

[0035] Example 6:

[0036] According to the terminal block that is not easily loosened as described in Embodiment 1, both the positive screw and the negative screw have fastening grooves.

[0037] Working principle: When the screw is turned clockwise, it tightens the terminal wiring on this side; when turned counterclockwise, it loosens the terminal wiring. When the screw is turned counterclockwise, it tightens the terminal wiring on this side; when turned clockwise, it loosens the terminal wiring. The same terminal wiring can be tightened using both clockwise and counterclockwise screws. If vibration causes the clockwise screw to loosen when turned counterclockwise, under the same vibration source, turn the counterclockwise screw counterclockwise to tighten the wiring; if vibration causes the counterclockwise screw to loosen when turned clockwise, under the same vibration source, turn the clockwise screw clockwise to tighten the wiring.

[0038] The ends of the clockwise and counterclockwise screws can be equipped with a built-in gear head or an external gear head, and can be configured with linkage accessories according to actual needs. The linkage accessories include driven gears and linkage chains.

[0039] When selecting a driven gear, it is installed in a driven gear hole and meshes with both the forward and reverse screw gears. If vibration causes the forward screw to rotate counter-clockwise, resulting in loose wiring, the forward screw will cause the driven gear to rotate instantaneously clockwise, which in turn will cause the reverse screw to rotate counter-clockwise, thus tightening the wiring. Conversely, if vibration causes the reverse screw to rotate clockwise, potentially loosening the wiring, the reverse screw will cause the driven gear to rotate counter-clockwise, which in turn will cause the forward screw to rotate clockwise, thus tightening the wiring.

[0040] When selecting to install a linkage chain, the linkage chain consists of two gears and a chain. Except for the cross-section, the chain is manufactured and connected as a single piece. At the cross-section, the chain fixing pin is fixed to the fixing hole by the elastic force of the spring, thus connecting the chains together. The chain is just locked onto the two gears. The two gears can be fixed to the clockwise screw and the counterclockwise screw respectively. When the clockwise screw rotates counterclockwise, causing the wiring to loosen, the clockwise screw drives the gear on its upper part to drag the chain to rotate, causing the counterclockwise screw gear to rotate counterclockwise. Since the counterclockwise screw is fixed to its upper gear, the counterclockwise rotation of the counterclockwise screw tightens the terminal wiring.

[0041] The driven gear is surrounded by a circular scale mark. After the driven gear is installed, the top of the red tooth should be pointed to the zero point of the circular scale mark. When the screw is turned clockwise or counterclockwise, the driven gear will change accordingly. By checking the direction of the red tooth of the driven gear, it can be determined whether the screw is loose or not, which is convenient for relevant personnel to check.

Claims

1. A terminal block that is not easily loosened, comprising: The terminal block body, plastic clips, outer wiring holes, inner wiring holes, and shorting holes are characterized by: a linkage fastening device for securing the terminals is fixed at both the inner and outer wiring points of the terminal block body; the linkage fastening device includes a positive screw, a negative screw, and a linkage mechanism that drives the positive and negative screws to rotate in the same direction; the linkage mechanism is a driven gear linkage, a driven gear rod is inserted into the driven gear hole and locked in place, a driven gear is fixed to the top of the driven gear rod, and the driven gear meshes with the positive screw gear at the top of the positive screw and the negative screw gear at the top of the negative screw respectively; a spring is fixed to the bottom of the driven gear rod, and limit pins are fixed to both ends of the spring, the limit pins being located in the cavity at the bottom of the terminal block body; circular scale markings are engraved around the driven gear; both the positive and negative screws have fastening grooves.

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