Structure for enhancing high-current contact reliability

Abstract

The utility model discloses a structure for enhancing large current contact reliability, which relates to the technical field of electric energy metering and comprises a bottom plate, the bottom plate is provided with a current wire inlet and a current wire outlet, the current wire inlet and the current wire outlet are provided with copper bars, the copper bar of the current wire inlet is connected with a current inlet wire, and the copper bar of the current wire outlet is connected with a current outlet wire. The copper bar of the current wire outlet is connected with a current outlet wire, the bottom plate is provided with a movable plate, the positions, corresponding to the current wire inlet and the current wire outlet, of the movable plate are respectively provided with an opening, the movable plate is fixedly provided with a shunt, the two ends of the shunt are respectively connected with the two openings, and the two ends of the shunt are respectively connected with the two openings. One side of the movable plate is attached to the connecting rod mechanism; through the cooperation of the movable plate and the connecting rod mechanism, the current divider and the copper bar can be tightly attached, so that the meter pen connecting lines are tightly attached, and the heating condition is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric energy metering, in particular to a structure for enhancing the reliability of large current contact. Background Art

[0002] As an important measuring instrument for trade settlement, electric energy meter is widely used in industrial and agricultural production and daily life. Its measurement accuracy is directly related to the vital interests of both power suppliers and users. Under high current conditions, if the contact between the meter pen and the meter body is not sufficient, excessive heat will occur, resulting in inaccurate final measurement results.

[0003] For example, Chinese patent CN207752139U, published on August 21, 2018, proposes a high-current docking mechanism for an electric energy meter socket, including a propulsion mechanism and an electric energy meter socket, the propulsion mechanism is provided with a high-current contact spring, the electric energy meter socket is provided with a socket contact copper sheet; the high-current contact spring sheet includes a matching portion and a fixing portion formed integrally with the matching portion, the matching portion is provided with a rectangular groove, and the surface of the fixing portion is provided with first, second and third mounting holes in parallel; the socket contact copper sheet includes a tab, one side of the tab is integrally connected with a mounting lug perpendicular to the tab, the mounting lug is provided with a fourth mounting hole, the other side of the tab is integrally connected with a mounting block, the mounting block is provided with a fifth mounting hole; the socket contact copper sheet is arranged to be inserted and matched into the rectangular groove of the high-current contact spring sheet. However, although quick docking and separation are achieved, the connection is not sufficiently contacted under high current, resulting in large measurement errors. Utility Model Content

[0004] The utility model aims to solve the technical problem that the existing electric energy meter has insufficient contact under high current conditions. A structure for enhancing the reliability of high current contact is proposed to ensure that the electric energy meter has sufficient contact under high current conditions.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a structure for enhancing the reliability of large current contact, including a base plate, the base plate is provided with a current inlet and a current outlet, the current inlet and the current outlet are provided with a copper bus, the copper bus of the current inlet is connected to the incoming current line, and the copper bus of the current outlet is connected to the outgoing current line, the base plate is provided with a movable plate, the movable plate is provided with openings at positions corresponding to the current inlet and the current outlet, the movable plate is fixed by a shunt, the two ends of the shunt are respectively connected to the two openings, and one side of the movable plate is in contact with the connecting rod mechanism.

[0006] A structure for enhancing the reliability of large current contact, wherein the connecting wires at both ends of the test leads of an electric energy meter are respectively connected to copper bars extending from a current inlet and a current outlet and passing through two openings of a movable plate, and the movable plate is controlled to move in translation through a connecting rod mechanism, so that a shunt fixed on the movable plate is in full contact with the copper bar, thereby achieving full contact between the two ends of the test leads, avoiding excessive heating and causing measurement errors.

[0007] Preferably, movable grooves are respectively provided at both ends of the movable plate, and limiting bolts connected to the bottom plate are provided in the movable grooves, and nuts of the limiting bolts are located on the surface of the movable plate. The limiting bolts prevent the movable plate from moving up and down.

[0008] Preferably, the side where the movable plate and the connecting rod mechanism are in contact is provided with a plurality of sliding surfaces, the depression of the sliding surfaces into the inside of the movable plate gradually decreases from one end to the other end, and a pulley is provided at the position where the connecting rod mechanism and the sliding surface are in contact. The movable plate is pushed to move by the movement of the pulley on the slide rail.

[0009] Preferably, the connecting rod mechanism comprises a slide slot, the slide slot is connected to the bottom plate, the slide slot is connected to a slide rail, and the pulley is fixed on the slide rail. The displacement of the slide rail on the slide slot drives the displacement of the pulley thereon, thereby realizing the displacement of the movable plate.

[0010] Preferably, a support column is provided at one end of the slide rail, the support column is connected to one end of a fixed block by a bolt, the other end of the fixed block is fixed to the slide rail, and a section of the fixed block connected to the support column is connected to a joystick. The structure formed between the fixed block and the joystick is a locking structure, which can prevent the movable plate from rebounding.

[0011] Preferably, the inlet current line and the outlet current line extend from the openings at both ends of the movable plate respectively. The inlet current line and the outlet current line extend from the openings and overlap with the diverter.

[0012] Preferably, the width of the opening is greater than the sum of the thickness of the incoming current line and the thickness of the shunt, and the thickness of the incoming current line is the same as that of the outgoing current line. The thickness of the opening can at least accommodate the incoming current line and the shunt.

[0013] Preferably, two ends of the diverter are fixed to the edge of the opening by bolts respectively. The diverter moves with the movement of the movable plate.

[0014] The substantial effect of the utility model is that the utility model can achieve a tight fit between the shunt and the test leads through the cooperation of the movable plate and the connecting rod mechanism, thereby making the test lead lines fit tightly together, avoiding a large amount of heat generation and causing excessive errors in the final measurement results; the connecting rod structure has a self-locking function to prevent the movable plate from rebounding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the first embodiment;

[0016] Figure 2 It is an oblique side view of the first embodiment;

[0017] Figure 3 is a top view of the first embodiment;

[0018] Figure 4 It is a side view of the first embodiment.

[0019] Among them: 1. base, 2. movable plate, 3. copper busbar, 4. diverter, 5. limit bolt, 6. movable groove, 7. joystick, 8. fixed block, 9. slide rail, 10. slide groove, 11. pulley, 12. sliding surface. DETAILED DESCRIPTION

[0020] The specific implementation of the utility model is further described below through specific embodiments and in conjunction with the accompanying drawings.

[0021] Embodiment 1:

[0022] A structure that enhances high current contact reliability, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the structure mainly includes three parts: a base 1, a movable plate 2 and a connecting rod mechanism. The base is rectangular in shape with rounded corners on all sides. The movable plate is also rectangular in shape with rounded corners on all sides. Two openings on the same straight line are arranged in the middle of the bottom plate, which are used as the current inlet and the current outlet respectively. An L-shaped copper bar 3 is fixed in the current inlet and the current outlet respectively. One side of the copper bar extends into the current inlet and the current outlet, and the other side is located at the bottom of the bottom plate, so that the copper bar is stuck on the bottom plate. The two current wires of the probe of the electric energy meter can be connected to the corresponding copper bars extending from the two openings respectively. The current wires of the probe of the electric energy meter are divided into an input current wire and an output current wire according to the positive and negative of the probe. The input current wire is connected to the copper bar extending into the current inlet, and the output current wire is connected to the copper bar extending into the current outlet.

[0023] The movable plate is fixed on the bottom plate by the limit bolt 5. A movable groove 6 is provided on both sides of the movable plate, and the shape of the movable groove is a long strip. The width of the movable groove is greater than the main body diameter of the limit bolt and smaller than the nut diameter of the limit bolt. The bottom plate is provided with a threaded hole at the position corresponding to the two movable grooves on the movable plate, and the limit bolt extends from the top of the movable plate and is fixed in the threaded hole. The limit bolt is fixed to the bottom plate, and the movable plate can realize the movement of the movable groove by the relative movement of the limit bolt in the movable groove. The limit bolt can limit the translation distance of the movable plate within a certain range, and can also limit the up and down movement of the movable plate.

[0024] The movable plate is provided with an opening at the position relative to the current inlet and the current outlet on the bottom plate. After the movable plate is fixed on the bottom plate, when the movable plate moves, there will be a position where the current inlet and the current outlet coincide with the opening on the movable plate. After the current line of the electric energy meter probe is connected to the copper bar extending into the current inlet and the current outlet on the bottom plate, one side of the copper bar extending into the current inlet and the current outlet will extend from the opening on the movable plate. A shunt 4 is fixed on the movable plate by bolts. The shunt is fixed to the edges of the two openings. The bottoms on both sides of the shunt are L-shaped, that is, the bottoms on both sides of the shunt are bent to one side until they are perpendicular to each other with the main part. The bent part is fixed to the edge of the opening on the movable plate by bolts, so that the main part of the shunt is located within the opening range of the movable plate. When the movable plate moves, the copper bar extending out of the opening can fit tightly with the shunt.

[0025] A connecting rod mechanism is arranged beside the movable plate, and the connecting rod mechanism is close to the movable plate. Through the operation of the connecting rod mechanism, the connecting rod mechanism will push the movable plate to move, so that the copper bar in the opening of the movable plate is closely fitted with the shunt, and a large amount of heat will not be generated.

[0026] Embodiment 2:

[0027] The structure of this embodiment mainly includes three parts: a base, a movable plate and a connecting rod mechanism. The base is rectangular in shape with rounded corners on all sides. The movable plate is also rectangular in shape with rounded corners on all sides. Two openings on the same straight line are arranged in the middle of the bottom plate, which are used as the current inlet and the current outlet respectively. An L-shaped copper bar is fixed in the current inlet and the current outlet respectively. One side of the copper bar extends into the current inlet and the current outlet, and the other side is located at the bottom of the bottom plate, so that the copper bar is stuck on the bottom plate. The two current wires of the test leads of the electric energy meter can be connected to the corresponding copper bars extending from the two openings respectively. The current wires of the test leads of the electric energy meter are divided into an input current wire and an output current wire according to the positive and negative of the test leads. The input current wire is connected to the copper bar extending into the current inlet, and the output current wire is connected to the copper bar extending into the current outlet.

[0028] A movable plate is fixed on the bottom plate by limiting bolts. A movable groove is provided on both sides of the movable plate, and the shape of the movable groove is a long strip. The width of the movable groove is greater than the main body diameter of the limiting bolt and smaller than the nut diameter of the limiting bolt. A threaded hole is provided on the bottom plate at the position corresponding to the two movable grooves on the movable plate, and the limiting bolt extends from the top of the movable plate and is fixed in the threaded hole. The limiting bolt is fixed on the bottom plate, and the movable plate can move relative to the movable groove through the limiting bolt, thereby realizing the movement of the movable groove. The limiting bolt can limit the translation distance of the movable plate within a certain range, and can also limit the up and down movement of the movable plate.

[0029] The movable plate is provided with an opening at a position relative to the current inlet and the current outlet on the bottom plate. After the movable plate is fixed on the bottom plate, when the movable plate moves, there will be a position where the current inlet and the current outlet coincide with the opening on the movable plate. After the current line of the electric energy meter probe is connected to the copper busbar extending into the current inlet and the current outlet on the bottom plate, one side of the copper busbar extending into the current inlet and the current outlet will extend from the opening on the movable plate. A shunt is fixed on the movable plate by bolts. The shunt is fixed to the edges of the two openings. The bottoms on both sides of the shunt are L-shaped, that is, the bottoms on both sides of the shunt are bent to one side until they are perpendicular to each other with the main part. The bent part is fixed to the edge of the opening on the movable plate by bolts, so that the main part of the shunt is located within the opening range of the movable plate. When the movable plate moves, the copper busbar extending out of the opening can fit tightly with the shunt.

[0030] A connecting rod mechanism is arranged beside the movable plate, and the connecting rod mechanism is close to the movable plate. Through the operation of the connecting rod mechanism, the connecting rod mechanism will push the movable plate to move, so that the copper bar in the opening of the movable plate is closely fitted with the shunt, and a large amount of heat will not be generated.

[0031] A connecting rod mechanism is arranged next to the movable plate, and the connecting rod mechanism is close to the movable plate. Through the operation of the connecting rod mechanism, the connecting rod mechanism will push the movable plate to move, so that the current line in the opening of the movable plate is closely fitted with the shunt. Two sliding surfaces 12 are arranged on the side of the movable plate close to the connecting rod mechanism, and the sliding surfaces are recessed toward the inner side of the movable plate. The degree of the inward recess of the sliding surface gradually decreases from one side to the other side. A pulley 11 is arranged at a position adjacent to the sliding surface on the connecting rod mechanism, and one pulley corresponds to one sliding surface. The connecting rod mechanism is provided with a slide groove 10, which is fixed to the bottom plate. A slide rail 9 is connected to the slide groove, and the slide rail can move in the slide groove. The pulley is fixed on the slide rail. When the slide rail moves, the pulley will move in the slide surface. When the pulley is located at the largest recess of the slide surface, the connecting line in the opening of the movable plate is loosened from the shunt. When the pulley drives out of the slide surface, the connecting line in the opening of the movable plate is firmly attached to the shunt to avoid the increase of current and heating caused by phase loss.

[0032] Embodiment three:

[0033] The structure of this embodiment mainly includes three parts: a base, a movable plate and a connecting rod mechanism. The base is rectangular in shape with rounded corners on all sides. The movable plate is also rectangular in shape with rounded corners on all sides. Two openings on the same straight line are arranged in the middle of the bottom plate, which are used as the current inlet and the current outlet respectively. An L-shaped copper bar is fixed in the current inlet and the current outlet respectively. One side of the copper bar extends into the current inlet and the current outlet, and the other side is located at the bottom of the bottom plate, so that the copper bar is stuck on the bottom plate. The two current wires of the test leads of the electric energy meter can be connected to the corresponding copper bars extending from the two openings respectively. The current wires of the test leads of the electric energy meter are divided into an input current wire and an output current wire according to the positive and negative of the test leads. The input current wire is connected to the copper bar extending into the current inlet, and the output current wire is connected to the copper bar extending into the current outlet.

[0034] A movable plate is fixed on the bottom plate by limiting bolts. A movable groove is provided on both sides of the movable plate, and the shape of the movable groove is a long strip. The width of the movable groove is greater than the main body diameter of the limiting bolt and smaller than the nut diameter of the limiting bolt. A threaded hole is provided on the bottom plate at the position corresponding to the two movable grooves on the movable plate, and the limiting bolt extends from the top of the movable plate and is fixed in the threaded hole. The limiting bolt is fixed on the bottom plate, and the movable plate can move relative to the movable groove through the limiting bolt, thereby realizing the movement of the movable groove. The limiting bolt can limit the translation distance of the movable plate within a certain range, and can also limit the up and down movement of the movable plate.

[0035] The movable plate is provided with an opening at a position relative to the current inlet and the current outlet on the bottom plate. After the movable plate is fixed on the bottom plate, when the movable plate moves, there will be a position where the current inlet and the current outlet coincide with the opening on the movable plate. After the current line of the electric energy meter probe is connected to the copper busbar extending into the current inlet and the current outlet on the bottom plate, one side of the copper busbar extending into the current inlet and the current outlet will extend from the opening on the movable plate. A shunt is fixed on the movable plate by bolts. The shunt is fixed to the edges of the two openings. The bottoms on both sides of the shunt are L-shaped, that is, the bottoms on both sides of the shunt are bent to one side until they are perpendicular to each other with the main part. The bent part is fixed to the edge of the opening on the movable plate by bolts, so that the main part of the shunt is located within the opening range of the movable plate. When the movable plate moves, the copper busbar extending out of the opening can fit tightly with the shunt.

[0036] A connecting rod mechanism is arranged beside the movable plate, and the connecting rod mechanism is close to the movable plate. Through the operation of the connecting rod mechanism, the connecting rod mechanism will push the movable plate to move, so that the copper bar in the opening of the movable plate is closely fitted with the shunt, and a large amount of heat will not be generated.

[0037] A connecting rod mechanism is arranged beside the movable plate, and the connecting rod mechanism is close to the movable plate. Through the operation of the connecting rod mechanism, the connecting rod mechanism will push the movable plate to move, so that the current line in the opening of the movable plate is closely fitted with the shunt. Two sliding surfaces are arranged on the side of the movable plate close to the connecting rod mechanism, and the sliding surfaces are recessed toward the inner side of the movable plate. The degree of the inward recess of the sliding surface gradually decreases from one side to the other side. A pulley is arranged at a position adjacent to the sliding surface on the connecting rod mechanism, and one pulley corresponds to one sliding surface. The connecting rod mechanism is provided with a slide groove, which is fixed to the bottom plate. A slide rail is connected to the slide groove, and the slide rail can move in the slide groove. The pulley is fixed on the slide rail. When the slide rail moves, the pulley moves in the slide surface. When the pulley is located at the largest recess of the slide surface, the connecting line in the opening of the movable plate is loosened from the shunt. When the pulley drives out of the slide surface, the connecting line in the opening of the movable plate is firmly attached to the shunt, avoiding the increase of current and heating caused by phase loss.

[0038] A support column is provided on one side of the slide rail of the linkage mechanism, and one end of the joystick 7 is connected to the top of the support column by a bolt as a rotation axis. The rotation axis is also connected to one end of a fixed block 8, and the other end of the fixed block is connected to the slide rail and forms an acute angle with the slide rail. When the joystick rotates, it will drive the fixed block to rotate, and the rotation of the fixed block will drive the slide rail to move. When the joystick rotates to the bottom, the slide rail will be fixed due to the action of the fixed block. A self-locking structure is formed between the joystick, the fixed block and the support rod, thereby preventing the slide rail from moving and causing a gap between the connecting line in the opening of the movable plate and the diverter.

[0039] This solution can achieve a tight fit between the shunt and the test leads through the cooperation of the movable plate and the connecting rod mechanism, thereby making the test lead connections fit tightly together, avoiding a large amount of heat generation that would cause excessive errors in the final measurement results; the connecting rod structure has a self-locking function to prevent the movable plate from rebounding.

[0040] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A structure for enhancing high current contact reliability, characterized in that: It includes a bottom plate, the bottom plate is provided with a current inlet and a current outlet, the current inlet and the current outlet are provided with copper bars, the copper bars of the current inlet are connected to the incoming current line, and the copper bars of the current outlet are connected to the outgoing current line, the bottom plate is provided with a movable plate, the movable plate is provided with openings at positions corresponding to the current inlet and the current outlet, the movable plate is fixed by a shunt, the two ends of the shunt are respectively connected to the two openings, and one side of the movable plate is fitted with a connecting rod mechanism.

2. A structure for enhancing high current contact reliability according to claim 1, characterized in that: Both ends of the movable plate are respectively provided with movable grooves, and limiting bolts connected with the bottom plate are arranged in the movable grooves, and nuts of the limiting bolts are located on the surface of the movable plate.

3. The structure for enhancing high current contact reliability according to claim 1, characterized in that: The side surfaces where the movable plate and the connecting rod mechanism are in contact are provided with a plurality of sliding surfaces, the depression degree of the sliding surfaces toward the inside of the movable plate gradually decreases from one end to the other end, and pulleys are provided at the positions where the connecting rod mechanism and the sliding surfaces are in contact.

4. A structure for enhancing high current contact reliability according to claim 3, characterized in that: The connecting rod mechanism comprises a slide groove, the slide groove is connected to the bottom plate, the slide groove is connected to a slide rail, and the pulley is fixed on the slide rail.

5. A structure for enhancing high current contact reliability according to claim 4, characterized in that: A support column is provided at one end of the slide rail, and the support column is connected to one end of a fixed block through a bolt, and the other end of the fixed block is fixed to the slide rail, and a section of the fixed block connected to the support column is connected to a joystick.

6. A structure for enhancing high current contact reliability according to claim 1, 2 or 3, characterized in that: The inlet current line and the outlet current line extend out from the openings at both ends of the movable plate respectively.

7. A structure for enhancing high current contact reliability according to claim 1, 2 or 3, characterized in that: The width of the opening is greater than the sum of the thickness of the incoming current line and the thickness of the shunt, and the thickness of the incoming current line is the same as that of the outgoing current line.

8. A structure for enhancing high current contact reliability according to claim 1, 2 or 3, characterized in that: The two ends of the diverter are respectively fixed to the opening edge by bolts.

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