Quick-connection wiring terminal for electric energy meter

Abstract

The utility model relates to a quick-connection wiring terminal for an electric energy meter, which comprises a wiring end and a wiring hole, a limiting hole is arranged on the side wall of the wiring hole, the limiting hole penetrates through the wiring end, a limiting block is arranged in the limiting hole, and an inward step is arranged at one end of the limiting hole far away from the wiring hole. A first reset spring is arranged between the limiting block and the step, a pull rod is arranged on the limiting block, a pull plate is arranged on the outer side of the wiring end, and the pull rod penetrates through the limiting hole and is fixed to the pull plate. A cable connector is arranged in the wiring hole, a positioning notch is formed in the cylindrical surface of the cable connector, and the positioning notch is matched with the limiting block; a shielding cover is arranged on the outer side of the wiring terminal; automatic locking is completed by directly pushing in the cable connector, unlocking can be achieved only through simple operation during wire dismounting, the wiring process is simplified, the installation and maintenance efficiency is improved, the shielding cover can effectively cover the wiring end and the wiring hole, dust, impurities and other foreign matter are prevented from entering the wiring end, and the situation that the contact stability is affected due to the fact that the foreign matter is attached is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric energy meter especially is related to a quick connection wiring terminal for electric energy meter. BACKGROUND

[0002] As the core instrument of electric energy measurement, the wiring terminal of electric energy meter is the key component to realize the connection between external cable and internal circuit, which is directly related to the measurement accuracy and operation stability. The existing wiring terminal of electric energy meter generally comprises a wiring terminal fixed to the shell of electric energy meter, and a wiring hole provided on the wiring terminal for the insertion of cable, and the circuit conduction is realized through the cooperation of the wiring hole and cable.

[0003] However, such wiring terminal has the following defects: 1. It relies on the interference fit between cable and wiring hole or needs to be tightened by screwdriver, which is complicated and inefficient, and improper tightening force may cause poor contact and damage to the component, affecting the measurement accuracy, and it cannot be quickly disassembled; 2. When the cable is not inserted, the wiring hole is exposed to the environment, and dust and impurities can easily enter the interior, which not only increases the contact resistance, but also may reduce the insulation performance and increase the risk of short circuit, resulting in operation risk of electric energy meter. SUMMARY

[0004] To solve the above problems, the utility model provides a quick connection wiring terminal for electric energy meter.

[0005] The technical scheme adopted by the utility model to solve its technical problems is:

[0006] A quick connection wiring terminal for electric energy meter, comprising a wiring terminal arranged on the electric energy meter, a wiring hole arranged on the wiring terminal, a limiting hole arranged on the side wall of the wiring hole, the limiting hole penetrating the wiring terminal, a limiting block arranged in the limiting hole, a step inwardly arranged at one end of the limiting hole away from the wiring hole, a first return spring arranged between the limiting block and the step, a pull rod arranged on the limiting block, a pull plate arranged on the outer side of the wiring terminal, the pull rod penetrating the limiting hole and being fixed to the pull plate, and the pull plate being larger than the limiting hole; a cable connector arranged in the wiring hole, the cable connector being columnar, a positioning notch arranged on the cylindrical surface of the cable connector, the positioning notch cooperating with the limiting block; and a shielding cover arranged on the outer side of the wiring terminal.

[0007] Further, a fixed plate is arranged on one side of the pull plate close to the limiting block, the fixed plate covering the limiting hole and being fixed to the wiring terminal, the pull rod penetrating the fixed plate, and the step being formed by the fixed plate and the limiting hole.

[0008] Further, a handle is arranged on the pull plate.

[0009] Further specifically, the shielding cover comprises a cover body and a shielding plate arranged on the cover body, the cover body is surrounded by four side plates and forms openings at two ends, and the shielding plate is arranged at the first opening of the cover body away from the wiring end.

[0010] Further specifically, a rotating shaft is arranged at the side of the first opening, one end of the shielding plate is arranged on the rotating shaft and can rotate around the rotating shaft, a first positioning hole is arranged at the end of the shielding plate away from the rotating shaft, and a first positioning pin group is arranged on the side of the first opening away from the rotating shaft, the positioning pins in the first positioning pin group are inserted into the positioning hole to shield the first opening.

[0011] Further specifically, a second positioning pin group is arranged at the second opening of the cover body away from the first opening, the second positioning pin group is arranged on the side plate close to the rotating shaft, and the other end of the shielding plate can be close to the second opening around the rotating shaft and is limited from rotating downward by cooperation between the second positioning pin group and the positioning hole.

[0012] Further specifically, the first positioning pin group and the second positioning pin group are the same in structure and each comprise a positioning plate arranged on the cover body, a second positioning hole arranged on the positioning plate, and a positioning pin arranged in the second positioning hole and capable of moving axially along the second positioning hole, the positioning pin can be inserted into the first positioning hole through the second positioning hole.

[0013] Further specifically, a radial boss is arranged on the positioning pin, and a second return spring is arranged between the radial boss and the positioning plate.

[0014] Further specifically, a third positioning hole is arranged on each of the two opposite side surfaces of the cover body, and a positioning bead spring plunger capable of being clamped into the third positioning hole is arranged on the corresponding wiring end.

[0015] The utility model discloses the beneficial effect is: realized the operation convenience, dustproof nature and the effect of installation stability, the limiting block of the wiring hole side wall and first return spring constitute self -locking mechanism, cooperate the arc -shaped positioning gap on cable connector, need not to help screwdriver and other tools, only through direct push -in cable connector can complete automatic locking, when disconnecting, also only need simple operation can be unlocked, the wiring process is greatly simplified, and the installation and maintenance efficiency are improved, and the shielding cover of wiring end outside can effectively cover wiring end and wiring hole, reduce dust, impurity and other foreign matters to enter the inside of wiring terminal, avoid the contact stability of foreign matter adhesion to influence wiring hole and cable connector. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the assembly structure schematic diagram of quick -wired terminal for electric energy meter Figure One ;

[0017] Figure 2 is the assembly structure diagram of the quick connection terminal for the electric energy meter Figure Two ;

[0018] Figure 3 is the enlarged structure diagram of the A part in the utility model

[0019] Figure 4 is Figure 3 the enlarged structure diagram of the B part

[0020] Figure 5 is the structure diagram of the utility model without connecting cable

[0021] Figure 6 is the enlarged structure diagram of the B part Figure 5

[0022] In the figure: 10, terminal; 20, terminal hole; 21, limit block; 22, first reset spring; 23, pull rod; 24, pull plate; 25, fixed plate; 26, handle; 30, external cable; 40, cable connector; 41, positioning notch; 50, shielding cover; 51, cover body; 511, third positioning hole; 52, shielding plate; 521, first positioning hole; 60, rotating shaft; 70, first positioning pin group; 80, second positioning pin group; 81, positioning plate; 82, second positioning hole; 83, positioning pin; 84, radial boss; 85, second reset spring. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be described below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0024] In the description of the utility model, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. The direction of movement is also a relative direction of movement, and does not limit the absolute direction of movement. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] ​In the description of the utility model, it needs to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication.For ordinary skilled in the art, the above-mentioned terms can be understood in the specific meaning in the utility model according to specific circumstances.In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] As Figure 1 With Figure 2 The utility model provides a kind of fast connection terminal for electric energy meter, including terminal 10, terminal hole 20, shield cover 50, self-locking mechanism is arranged in terminal hole 20, the terminal 10 is arranged on electric energy meter, terminal hole 20 is arranged on terminal 10 and can accommodate external cable 30, shield cover 50 can shield terminal 10.

[0027] The specific structure of the self-locking mechanism is as follows:

[0028] As Figure 3 With Figure 4 Limiting hole is arranged on the side wall of the terminal hole 20, the limiting hole is opened along the radial direction and penetrates the terminal 10, a limiting block 21 is arranged in the limiting hole, an inward step is arranged at one end of the limiting hole away from the terminal hole 20, a first return spring 22 is arranged between the limiting block 21 and the step, and the first return spring 22 pushes the limiting block 21 inwardly into the limiting hole; At the same time, a pull rod 23 is arranged on the side of the limiting block 21 away from the limiting hole, a pull plate 24 is arranged on the outside of the terminal 10, the pull rod 23 passes through the first return spring 22, the limiting hole and is fixed on the pull plate 24, the pull plate 24 is larger than the limiting hole so that it can abut against the outer wall of the terminal 10 under the action of the first return spring 22, thereby limiting the length of the limiting block 21 extending into the terminal hole 20; The cable connector 40 is used in cooperation with the limiting block 21, the cable connector 40 is fixedly connected to the external cable 30, the cable connector 40 is columnar and can be inserted into the terminal hole 20, a positioning notch 41 is arranged on the cylindrical surface of the cable connector 40, the shape and size of the positioning notch 41 cooperate with the limiting block 21, that is, the limiting block 21 can be inserted into the positioning notch 41, the positions where the positioning notch 41 and the limiting block 21 contact are arc-shaped to facilitate direct pushing, and the shield cover 50 is arranged on the outside of the terminal 10.

[0029] During wiring, directly align the cable connector 40 with the external cable 30 and the wiring hole 20, and push it into the wiring hole 20. Since the contact parts of the positioning notch 41 and the limiting block 21 are both arc-shaped, during the pushing process, the front end of the cable connector 40 will naturally squeeze the arc-shaped end of the limiting block 21, forcing the limiting block 21 to overcome the elastic force of the first reset spring 22 and retract into the limiting hole until the cable connector 40 is fully inserted into the wiring hole 20. When the cable connector 40 is inserted to the preset position, the elastic thrust of the first reset spring 22 pushes the limiting block 21 to reset, and the arc-shaped end of the limiting block 21 slides into the positioning notch 41, realizing the automatic locking of the cable connector 40 and completing the wiring.

[0030] When disconnecting the cable, simply pull the cable connector 40 outwards. During the pulling process, the arc-shaped inner wall of the positioning notch 41 will squeeze the arc-shaped end of the limiting block 21, causing the limiting block 21 to retract into the limiting hole and disengage from the positioning notch 41. After the cable connector 40 is completely pulled out, the limiting block 21 returns to its normal position under the action of the first reset spring 22.

[0031] A fixing plate 25 is provided on the side of the pull plate 24 near the limiting block 21. The size of the fixing plate 25 is sufficient to cover the outer port of the limiting hole. The fixing plate 25 is firmly fixed to the outer wall of the terminal 10 by screws, clips, or welding. The pull rod 23 passes through a pre-set through hole on the fixing plate 25. The through hole is coaxial with the limiting hole, and its diameter is slightly larger than that of the pull rod 23 to ensure that the pull rod 23 can slide smoothly axially. The step is formed by the combination of the fixing plate 25 and the limiting hole. When the fixing plate 25 is fixedly installed on the outer wall of the terminal 10 and covers the limiting hole, the edges of the through hole and the limiting hole together form an annular, inwardly protruding step.

[0032] To further improve the ease of operation, especially when it is necessary to disconnect the wire or perform maintenance, a handle 26 is provided on the pull plate 24. When the internal jamming prevents the cable connector 40 from being pulled out smoothly, the limit block 21 can be retracted first by using the handle 26 before the cable connector 40 can be taken out.

[0033] like Figure 5 The shield 50 shown includes a shield body 51 and a shielding plate 52 disposed on the shield body 51. The shield body 51 is surrounded by four side plates and has openings at both ends. The openings are a first opening and a second opening, respectively. The second opening abuts against the electricity meter, and the wiring terminal 10 is located inside the shield body 51. The shielding plate 52 is disposed on the shield body 51 away from the first opening of the wiring terminal 10. The first opening is used for the external cable 30 to enter the wiring hole 20.

[0034] A rotating shaft 60 is arranged at one side edge of the first opening of the cover body 51 in the horizontal direction, and the shielding plate 52 is arranged on the rotating shaft 60 at the end of the side edge close to the rotating shaft 60 and can rotate around the rotating shaft 60, so that the shielding plate 52 can be switched between shielding the first opening and opening the first opening; in order to ensure that the shielding plate 52 does not loosen when covering the first opening, a first positioning hole 521 is arranged at the other end (i.e. the free end) of the shielding plate 52 away from the rotating shaft 60, and a first positioning pin group 70 is fixedly arranged at the side edge of the first opening of the cover body 51 away from the rotating shaft 60, and when the shielding plate 52 shields the first opening, the positioning pins 83 in the first positioning pin group 70 are inserted into the first positioning hole 521 to limit the movement of the shielding plate 52.

[0035] A second opening opposite to the first opening is arranged at the end of the cover body 51 away from the first opening, and a second positioning pin group 80 is fixedly arranged on the side plate close to the rotating shaft 60 at the second opening; when it is necessary to open the shielding plate 52 for wiring operation, the cooperation between the first positioning pin group 70 and the shielding plate 52 is first unlocked, then the shielding plate 52 is rotated around the rotating shaft 60 towards the direction close to the second opening, one end of the shielding plate 52 away from the rotating shaft 60 is close to the second opening, the first positioning hole 521 on the shielding plate 52 is aligned with the second positioning pin group 80, the positioning pins 83 in the second positioning pin group 80 are inserted into the first positioning hole 521 of the shielding plate 52, and the shielding plate 52 is arranged vertically.

[0036] The shielding plate 52 of the cover body 51 can be used in two stages, first, in the factory link, the shielding plate 52 covers the first opening of the cover body 51, and locking is realized through the cooperation between the first positioning pin group 70 and the first positioning hole 521, in the process of storage and logistics transportation of the electric energy meter, foreign matters such as dust and packaging debris in the outside are effectively blocked from entering the inside of the wiring end 10, and the cleanliness of the core components is protected; second, in the idle state after the external cable 30 is detached, when it is necessary to replace the external cable 30 or to overhaul the electric energy meter, the cable connector 40 is pulled out from the wiring hole 20, the shielding plate 52 is rotated to the first opening and locked, the wiring end 10 is prevented from being invaded by dust, hair and small foreign matters in the daily environment during the idle period, and the adhesion of foreign matters to the inner wall of the wiring hole 20 is prevented from affecting subsequent connection.

[0037] As Figure 6The first positioning pin group 70 and the second positioning pin group 80 are structurally identical, each comprising a positioning plate 81 arranged on the cover body 51, a second positioning hole 82 arranged on the positioning plate 81 and penetrating the positioning plate 81, a positioning pin 83 arranged in the second positioning hole 82 and axially movable along the second positioning hole 82, the positioning pin 83 being inserted into the first positioning hole 521 through the second positioning hole 82 when locked, a radial boss 84 arranged on the positioning pin 83, the diameter of the radial boss 84 being greater than the diameter of the second positioning hole 82, and a second return spring 85 arranged between the radial boss 84 and the positioning plate 81, the second return spring 85 being a tension spring in the present application, the second return spring 85 being sleeved on the positioning pin 83, the second return spring 85 ensuring that the positioning pin 83 is always inserted into the second positioning hole 82 without external force, maintaining the locked state and not being detached.

[0038] Corresponding positions of two opposite sides (such as left and right sides or front and rear sides) of the cover body 51 of the shielding cover 50 are respectively provided with third positioning holes 511, and the positions opposite to the third positioning holes 511 on the terminal 10 are provided with mounting holes, the mounting holes being fixedly assembled with positioning bead spring plungers, and the positioning beads partially extend outside the plunger body under the spring elastic force. When the cover body 51 is assembled to the terminal 10, the inner wall of the cover body 51 will extrude the positioning beads, so that the spring is compressed and retracted into the plunger body; when the cover body 51 moves to the position opposite to the third positioning hole 511, the positioning beads are ejected under the spring elastic force and are clamped into the third positioning hole 511, so as to realize the quick positioning and fixing of the cover body 51 and the terminal 10; when the cover body 51 is disassembled, the positioning beads are compressed again to retract the spring by pulling down the cover body 51, so as to be detached from the third positioning hole 511 and separated.

[0039] The application realizes the effects of convenient operation, dustproof and protection, and stable installation through the synergistic design of various structures; the limiting block 21 of the side wall of the wiring hole 20 and the first reset spring 22 form a self-locking mechanism, cooperating with the arc-shaped positioning notch 41 on the cable connector 40, without the aid of screwdrivers and other tools, automatic locking can be completed by directly pushing the cable connector 40, and when the cable is disconnected, unlocking can be achieved only by simple operation, greatly simplifying the wiring process and improving the installation and maintenance efficiency; the cover body 51 and the rotatable shielding plate 52 form a complete protection structure, after factory shipment or disconnection, the shielding plate 52 is locked in the first opening through the first positioning pin group 70, effectively blocking dust and impurities from entering the inside of the wiring terminal 10, avoiding the measurement deviation or the insulation performance decline caused by the attachment of foreign matters; when wiring, the shielding plate 52 can be rotated around the rotating shaft 60 and fixed on the second opening side through the second positioning pin group 80, preventing it from rotating downward and interfering with the wiring operation, and taking into account the protection and use convenience. In addition, the cover body 51 is matched with the positioning bead spring plunger of the wiring terminal 10 through the third positioning hole 511, realizing quick disassembly and assembly while ensuring stable connection, avoiding the loosening and falling of the cover body 51 during use.

[0040] It should be emphasized that: the above is only the preferred embodiment of the present application, and does not limit the present application in any form, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. A quick connection terminal for an electric energy meter, comprising a terminal (10) provided on an electric energy meter, and a terminal hole (20) provided on the terminal (10), characterized in that, The limiting hole is arranged on the side wall of the wiring hole (20), and the limiting hole penetrates the wiring terminal (10). A limiting block (21) is arranged in the limiting hole. An inward step is arranged at the end of the limiting hole away from the wiring hole (20). A first reset spring (22) is arranged between the limiting block (21) and the step. A pull rod (23) is arranged on the limiting block (21). A pull plate (24) is arranged outside the wiring terminal (10). The pull rod (23) penetrates the limiting hole and is fixed on the pull plate (24). The pull plate (24) is larger than the limiting hole. A cable joint (40) is arranged in the wiring hole (20). The cable joint (40) is in a columnar shape. A positioning notch (41) is arranged on the cylindrical surface of the cable joint (40). The positioning notch (41) cooperates with the limiting block (21). A shielding cover (50) is arranged outside the wiring terminal (10).

2. The quick-connect terminal for an electric energy meter according to claim 1, wherein A fixed plate (25) is arranged on the side of the pull plate (24) close to the limiting block (21). The fixed plate (25) covers the limiting hole and is fixed on the wiring terminal (10). The pull rod (23) penetrates the fixed plate (25). The step is formed by the fixed plate (25) and the limiting hole.

3. The quick-connect terminal for an electric energy meter according to claim 1, wherein A handle (26) is arranged on the pull plate (24).

4. The quick-connect terminal for an electric energy meter according to claim 1, wherein The shielding cover (50) comprises a cover body (51) and a shielding plate (52) arranged on the cover body (51). The cover body (51) is surrounded by four side plates and forms openings at both ends. The shielding plate (52) is arranged at the first opening of the cover body (51) away from the wiring terminal (10).

5. The quick-connect terminal for an electric energy meter according to claim 4, wherein A rotating shaft (60) is arranged at the side of the first opening. One end of the shielding plate (52) is arranged on the rotating shaft (60) and can rotate around the rotating shaft (60). A first positioning hole (521) is arranged at the end of the shielding plate (52) away from the rotating shaft (60). A first positioning pin group (70) is arranged at the side of the first opening away from the rotating shaft (60). The positioning pin (83) in the first positioning pin group (70) is inserted into the positioning hole to shield the first opening.

6. The quick-connect terminal for an electric energy meter according to claim 5, wherein A second positioning pin group (80) is arranged at the second opening of the cover body (51) away from the first opening. The second positioning pin group (80) is arranged on the side plate close to the rotating shaft (60). The other end of the shielding plate (52) is close to the second opening by rotating around the rotating shaft (60), and the shielding plate (52) is limited from rotating downward by cooperating with the positioning hole through the second positioning pin group (80).

7. The quick-connect terminal for an electric energy meter according to claim 6, wherein The first positioning pin group (70) and the second positioning pin group (80) have the same structure and comprise a positioning plate (81) arranged on the cover body (51), a second positioning hole (82) arranged on the positioning plate (81), and a positioning pin (83) arranged in the second positioning hole (82) and capable of moving axially along the second positioning hole (82). The positioning pin (83) can be inserted into the first positioning hole (521) through the second positioning hole (82).

8. The quick-connect terminal for an electric energy meter according to claim 7, wherein A radial boss (84) is arranged on the positioning pin (83), and a second reset spring (85) is arranged between the radial boss (84) and the positioning plate (81).

9. The quick-connect terminal for an electric energy meter according to claim 4, wherein Third positioning holes (511) are arranged on two opposite sides of the cover body (51), and positioning bead spring plungers which can be clamped into the third positioning holes (511) are arranged on the corresponding wiring terminals (10).

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