Electric energy meter with anti-loosening function
Patent Information
- Application Number
- CN202621245065.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-12
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2036-08-12
AI Technical Summary
在长期运行过程中，受外界震动、温度变化引发的导线热胀冷缩、安装应力逐步释放等因素影响，紧固螺钉容易发生回转松动，导致导线的压紧力下降，严重时会造成导线松脱、供电中断，影响电能表的正常工作
通过拧动紧固螺钉驱动接线框和接线件沿Z向相互靠近，利用第一抵接面接触抵接板产生X向的推力，来推动两个弹性夹板沿X向相互远离并发生弹性形变，使两个弹性夹板的间距逐渐增大，直至压接块能够完全进入两个弹性夹板之间的空间。
Smart Images
Figure CN224888746U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electricity meter technology, and in particular relates to an electricity meter with anti-loosening wiring function. Background Technology
[0002] An electricity meter is a fundamental device in a power system used for measuring electricity consumption. It is widely used in various power supply scenarios and performs the functions of electricity consumption statistics and accounting. The wiring mechanism is one of the core components of an electricity meter, used to achieve the electrical connection between the internal metering circuit and the external power supply conductor. The stability of this connection directly affects the accuracy of electricity measurement and the safety of electricity operation.
[0003] In existing technologies, most electricity meters use a screw-type direct-clamp wiring structure. This involves tightening a screw to directly press the end of the conductor onto the conductive terminal block, achieving both electrical continuity and mechanical fixation. However, during long-term operation, factors such as external vibrations, thermal expansion and contraction of the conductor due to temperature changes, and the gradual release of installation stress can cause the screw to loosen, leading to a decrease in conductor clamping force. In severe cases, this can cause the conductor to detach, resulting in power outages and affecting the normal operation of the electricity meter. Some existing wiring structures improve the screw's anti-loosening performance by adding elastic washers and anti-loosening nuts. However, these structures only lock the screw itself and cannot create a limiting anti-loosening effect at the clamping structure level. Therefore, the overall anti-loosening effect is limited and cannot effectively guarantee the long-term reliability of the wiring. Utility Model Content
[0004] The purpose of this utility model is to address the aforementioned technical problems by providing an energy meter with anti-loosening wiring functionality, thereby solving the aforementioned technical problems.
[0005] In view of this, the present invention provides an energy meter with anti-loosening wiring function, including a base, a top cover, and a wiring mechanism. The base has a storage chamber and a wiring chamber inside, the top cover is placed on the base, and the wiring mechanism includes: A terminal block is provided in a wiring chamber. A clamping member is provided on the end of the terminal block along the Z direction. The clamping member includes a mounting plate and two elastic clamping plates. The mounting plate is connected to the terminal block. The two elastic clamping plates are respectively inclinedly connected to the two ends of the mounting plate along the X direction, and the ends of the two elastic clamping plates are close to each other along the X direction. A connector is installed in the storage chamber. The connector is provided with a crimping block. The crimping block is located on the inner side of the connector away from the clamping member along the Z direction. Both ends of the crimping block along the X direction are provided with a first abutting surface and a second abutting surface. A fastening screw, which is threaded onto the terminal block, is used to drive the clamping member to move along the Z-direction toward the crimping block; When the clamping member moves along the Z direction and approaches the pressing block, the two first abutting surfaces are used to squeeze and push the ends of the two elastic clamping plates away from each other along the X direction. When the pressing block is located between the two elastic clamping plates, the two second abutting surfaces abut against the two elastic clamping plates respectively.
[0006] Furthermore, the elastic clamp also includes an abutment plate, which is obliquely connected to the end of the elastic clamp; The ends of the two abutment plates are positioned far apart from each other along the X-direction.
[0007] Furthermore, the pressing block is provided with slots on both sides along the X direction. When the pressing block is located between two elastic clamps, the abutting plate and the slots abut against each other.
[0008] Furthermore, the elastic clamp is also provided with a weight-reducing groove.
[0009] Furthermore, the elastic clamp is provided with a clamping block on the side of the clamp away from the connector along the Y direction.
[0010] The beneficial effects of this utility model are: By tightening the fastening screws, the wiring frame and the wiring component are driven to move closer to each other along the Z direction. The first contact surface contacts the contact plate to generate a thrust in the X direction, which pushes the two elastic clamps away from each other along the X direction and causes elastic deformation, so that the distance between the two elastic clamps gradually increases until the pressing block can completely enter the space between the two elastic clamps.
[0011] The wire section is then clamped and fixed by the crimping block and the wiring frame. The inner surfaces of the two elastic clamps abut against the second abutment surfaces on both sides of the crimping block, allowing the elastic clamps to clamp the crimping block using their own elastic rebound force, thus achieving Z-axis limiting of the crimping block. Even if the electricity meter is subjected to external forces such as vibration, causing the fastening screws to loosen, the wiring frame will not be able to move back due to the clamping force of the two elastic clamps, thereby ensuring that the wire section is in a compressed state and achieving the effect of preventing loosening of the wiring. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of the electricity meter of this utility model; Figure 2 This is a schematic diagram of the wiring mechanism of this utility model; Figure 3 This is a structural cross-sectional view of the wiring mechanism of this utility model; The markings in the diagram are as follows: 1. Base; 11. Storage compartment; 12. Wiring compartment; 2. Top cover; 3. Terminal block; 4. Clamping component; 41. Mounting plate; 42. Elastic clamping plate; 43. Abutment plate; 44. Weight reduction groove; 45. Clamping block; 5. Wiring component; 6. Pressing block; 61. First abutment surface; 62. Second abutment surface; 63. Slot; 7. Fastening screw. Detailed Implementation
[0013] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0014] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0015] Example 1:
[0016] This embodiment provides an energy meter with anti-loosening wiring function, including a base 1, a top cover 2, and a wiring mechanism. The base 1 has a storage chamber 11 and a wiring chamber 12. The top cover 2 is placed on the base 1. The wiring mechanism includes: Terminal block 3 is disposed in terminal chamber 12. A clamping member 4 is provided on the end of terminal block 3 along the Z direction. The clamping member 4 includes a mounting plate 41 and two elastic clamping plates 42. The mounting plate 41 is connected to terminal block 3. The two elastic clamping plates 42 are respectively inclinedly connected to the two ends of the mounting plate 41 along the X direction, and the ends of the two elastic clamping plates 42 are close to each other along the X direction. The connector 5 is installed in the storage chamber 11. The connector 5 is provided with a crimping block 6. The crimping block 6 is located on the inner side of the connector 3 away from the clamping member 4 along the Z direction. Both ends of the crimping block 6 along the X direction are provided with a first abutting surface 61 and a second abutting surface 62. Fastening screw 7, which is threaded onto terminal block 3, is used to drive clamping member 4 to move along the Z direction toward crimping block 6; When the clamping member 4 moves along the Z direction and approaches the pressing block 6, the two first abutting surfaces 61 are used to squeeze and push the ends of the two elastic clamping plates 42 away from each other along the X direction. When the pressing block 6 is located between the two elastic clamping plates 42, the two second abutting surfaces 62 abut against the two elastic clamping plates 42 respectively.
[0017] Furthermore, the elastic clamping plate 42 also includes an abutment plate 43, which is obliquely connected to the end of the elastic clamping plate 42; The ends of the two abutment plates 43 are positioned far apart from each other along the X direction.
[0018] In this technical solution, the electricity meter includes a base 1, a top cover 2, and a wiring mechanism. The base 1 serves as the supporting body for the electricity meter. Its interior is divided into a storage chamber 11 and a wiring chamber 12 by an integrally molded partition. The storage chamber 11 houses the metering circuit components of the electricity meter, while the wiring chamber 12, located at the Y-axis end of the base 1, is used for connecting external wires. The top cover 2 is fastened to the opening side of the base 1, simultaneously covering the upper openings of both the storage chamber 11 and the wiring chamber 12, thus protecting the internal components.
[0019] The terminal block 3 is located inside the wiring chamber 12. The clamping member 4 is an elastic component formed by integrally bending a conductive metal sheet and is installed inside the terminal block 3. It includes a mounting plate 41 and two elastic clamping plates 42. The mounting plate 41 is a flat plate structure that is laid flat inside the terminal block 3. The mounting plate 41 and the terminal block 3 can be fixed together by adhesive or by fasteners, so that the clamping member 4 can move synchronously with the terminal block 3.
[0020] Two elastic clamps 42 are integrally bent and extended from the two ends of the mounting plate 41 along the X direction toward the storage chamber 11. The plates of both elastic clamps 42 are inclined inward in the X direction, so that the distance between the free ends of the two elastic clamps 42 is smaller than the distance at the mounting plate 41, forming a constricted clamping structure. The elastic clamps 42 have elastic deformation capability. When subjected to an external force in the X direction, they can open outward, and after the external force is removed, they can return to their original position by their own elasticity.
[0021] The connector 5 is a component made of conductive material and is fixedly installed inside the storage chamber 11, electrically connected to the metering circuit of the electricity meter. A crimping block 6 is integrally provided on one end of the connector 5 facing the terminal block 3. The position of the crimping block 6 corresponds to the space between the two elastic clamps 42 along the Z-direction. The crimping block 6 is a block-shaped structure, with a first abutment surface 61 and a second abutment surface 62 respectively provided on its two sides along the X-direction. The first abutment surface 61 is located at the front end of the crimping block 6 facing the clamping member 4. The two first abutment surfaces 61 gradually slope outwards from front to back along the Z-direction, forming a tapered inlet section that is narrow at the front and wide at the rear. The second abutment surface 62 is located behind the first abutment surface 61 and gradually slopes inwards from front to back along the Z-direction.
[0022] Each elastic clamp 42 has an integrally bent and extended abutment plate 43 at its free end. The abutment plate 43 is inclined outward in the X direction. The distance between the free ends of the two abutment plates 43 is greater than the distance between the free ends of the two elastic clamps 42, forming an outwardly opening guide port.
[0023] The fastening screw 7 is a metal threaded connector. A threaded hole is provided on the side of the terminal block 3 away from the terminal chamber 12. The fastening screw 7 is threadedly connected to the threaded hole, and the end of the fastening screw abuts against the terminal block 5 to form a threaded transmission fit.
[0024] With the above structural design, during wiring operations, the external wires are first stripped to expose the metal conductors, and then inserted into the wiring chamber 12 through the inlet on the base 1. The conductors are located between the clamping member 4 and the crimping block 6. Then, the fastening screw 7 is tightened, driving the terminal block 3 to move towards the crimping block 6 along the Z direction. During the movement, the abutment plates 43 at the front ends of the two elastic clamping plates 42 first contact the two first abutment surfaces 61 at the front end of the crimping block 6. As the clamping member 4 continues to move, the first abutment surfaces 61 generate an X-direction force on the abutment plates 43, pushing the two elastic clamping plates 42 away from each other along the X direction and causing elastic deformation, so that the distance between the two elastic clamping plates 42 gradually increases until the crimping block 6 can completely enter the space between the two elastic clamping plates 42.
[0025] When the clamping member 4 moves to the preset position, the crimping block 6 fully enters between the two elastic clamping plates 42. The crimping block 6 and the wiring frame clamp and fix the wire part. The inner side plates of the two elastic clamping plates 42 respectively abut against the second abutting surfaces 62 on both sides of the crimping block 6. The elastic clamping plates 42 rely on their own elastic rebound force to clamp the crimping block 6, thereby achieving Z-direction limiting of the crimping block 6. Even if the electricity meter is subjected to external forces such as vibration, causing the fastening screw 7 to loosen, the wiring frame will not be able to move back due to the clamping force of the two elastic clamping plates 42, thus ensuring that the wire part is in a compressed state and achieving the effect of preventing loosening of the wiring.
[0026] When it is necessary to disassemble the wire, turn the fastening screw 7 in the opposite direction to allow the second abutment surface 62 of the crimping block 6 to press and push the two elastic clamps 42 away from each other in the X direction and cause elastic deformation, so that the distance between the two elastic clamps 42 gradually increases until the crimping block 6 completely separates from the space between the two elastic clamps 42, releasing the pressure on the wire and completing the wire disassembly.
[0027] Example 2:
[0028] This embodiment provides an energy meter with anti-loosening wiring function. In addition to the technical solution of the above embodiment, it also has the following technical features.
[0029] Furthermore, the crimping block 6 is provided with slots 63 on both sides along the X direction. When the crimping block 6 is located between the two elastic clamping plates 42, the abutting plate 43 and the slots 63 abut against each other. Through this structural design, when the clamping member 4 moves to the preset position, the crimping block 6 is completely inserted between the two elastic clamping plates 42, and at the same time, the abutting plates 43 at the ends of the two elastic clamping plates 42 are also correspondingly inserted into the slots 63 on both sides of the crimping block 6. The engagement of the abutting plate 43 and the slots 63 achieves Z-direction limiting and blocking, further improving the Z-direction limiting effect and enhancing the anti-loosening effect of the wiring.
[0030] Example 3:
[0031] This embodiment provides an energy meter with anti-loosening wiring function. In addition to the technical solution of the above embodiment, it also has the following technical features.
[0032] Furthermore, the elastic clamping plate 42 is also provided with a weight-reducing groove 44. The weight-reducing groove 44 is a through groove arranged along the extension direction of the plate body, which can be used to adjust the elastic stiffness of the elastic clamping plate 42 and reduce the overall weight of the clamping member 4.
[0033] Furthermore, a clamping block 45 is provided on the side of the elastic clamping plate 42 away from the connector 5 along the Y direction. The clamping block 45 is an integral structure with the elastic clamping plate 42 and corresponds to the position of the insulation part of the wire inserted into the wiring chamber 12. The clamping block 45 protrudes towards the inside of the elastic clamping plate 42, and by abutting against the plastic shell of the wire, the insulation part of the wire can be clamped and fixed, enhancing the limiting effect in the Y direction, effectively preventing the wire from being pulled out due to external force, and improving the stability of the connection.
[0034] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
Claims
1. An electricity meter with anti-loosening wiring function, characterized in that, Includes a base (1), a top cover (2), and a wiring mechanism. The base (1) has a storage chamber (11) and a wiring chamber (12). The top cover (2) is placed on the base (1). The wiring mechanism includes: Terminal block (3), the terminal block (3) is disposed in the wiring chamber (12), and a clamping member (4) is provided on the end of the terminal block (3) along the Z direction. The clamping member (4) includes a mounting plate (41) and two elastic clamping plates (42). The mounting plate (41) is connected to the terminal block (3), and the two elastic clamping plates (42) are respectively inclinedly connected to the two ends of the mounting plate (41) along the X direction, and the ends of the two elastic clamping plates (42) are close to each other along the X direction. The connector (5) is installed in the storage room (11). The connector (5) is provided with a crimping block (6). The crimping block (6) is located on the inner side of the connector (3) away from the clamping member (4) along the Z direction. The crimping block (6) is provided with a first abutting surface (61) and a second abutting surface (62) at both ends along the X direction. Fastening screw (7), which is threaded onto terminal block (3), is used to drive clamp (4) to move along the Z direction toward crimping block (6). When the clamping member (4) moves along the Z direction and approaches the pressing block (6), the two first abutting surfaces (61) are used to squeeze and push the ends of the two elastic clamps (42) away from each other along the X direction. When the pressing block (6) is located between the two elastic clamps (42), the two second abutting surfaces (62) abut against the two elastic clamps (42) respectively.
2. An energy meter with anti-loosening wiring function according to claim 1, characterized in that, The elastic clamp (42) also includes an abutment plate (43), which is obliquely connected to the end of the clamp; The ends of the two abutment plates (43) are positioned far apart from each other along the X direction.
3. An energy meter with anti-loosening wiring function according to claim 2, characterized in that, The pressing block (6) is also provided with slots (63) on both sides along the X direction. When the pressing block (6) is located between two elastic clamps (42), the abutting plate (43) and the slots (63) abut against each other.
4. An energy meter with anti-loosening wiring function according to claim 1, characterized in that, The elastic clamp (42) is also provided with a weight-reducing groove (44).
5. An energy meter with anti-loosening wiring function according to claim 1, characterized in that, The elastic clamp (42) is also provided with a clamping block (45) on the side away from the connector (5) along the Y direction.