A low-voltage drawer cabinet electrical connection drive mechanism

Abstract

The present invention belongs to the field of low-voltage drawer cabinets, and provides an electrical connection and transmission mechanism for a low-voltage drawer cabinet, which includes a back plate, a partition board and an auxiliary transmission and crimping assembly. The back plate is installed at the rear side of the drawer and changes its position with the pulling and pushing of the drawer. A first rectangular through hole is formed in the middle of the back plate, and first insulating fixing plates are symmetrically installed on both sides inside the first rectangular through hole. A copper busbar conductor terminal is connected between the two groups of first insulating fixing plates. The present invention completes the basic structure of the main circuit electrical connection through the copper busbar conductor terminal and the flexible copper foil connecting piece, effectively reducing the contact internal resistance, making the three-phase temperature rise balanced, and the equipment safer. At the same time, an auxiliary transmission and crimping structure is provided, so that after the backward movement of the drawer ends, the insulating pressure rod can be driven to press against the ends of the flexible copper foil connecting piece from the left and right sides, improving the connection force between the flexible copper foil connecting piece and the copper busbar conductor terminal, expanding the effective contact surface, and having fewer overall breakpoints, thus improving the line stability.

Description

Technical Field

[0001] The invention belongs to the field of low-voltage drawer cabinets, in particular to an electrical connection transmission mechanism of a low-voltage drawer cabinet. Background Art

[0002] Low-voltage drawer cabinet, also known as low-voltage drawer switch cabinet, is a kind of power equipment with a closed shell made of steel plate. The electrical components of the incoming and outgoing line circuits are installed in the drawer, thus forming a functional unit that can complete a certain type of power supply task. These functional units are separated from the busbar or cable by a grounded metal plate or a functional board made of plastic, forming three mutually isolated areas of the busbar, functional unit and cable. There are also isolation measures between each functional unit;

[0003] The contact between the dynamic plug-in of the drawer unit and the static plug-in of the low-voltage cabinet in the current low-voltage drawer cabinet plays an important role in carrying the current of the main circuit, so it is the key to the normal operation of the low-voltage drawer cabinet. In the prior art, the primary plug-in usually adopts a three-phase integrated or single-phase connector, and the dynamic plug-in and the static plug-in are in plug-in contact, and the main circuit connection is completed by the contact pressure of the connector spring.

[0004] However, due to long-term operation, the contact surface of the plug-in will be subjected to the combined effects of the thermal effect of the current and mechanical stress for a long time, causing the contact surface material to age, deform, or even melt. The aging contact surface will experience oxidation, corrosion, and other phenomena, thereby reducing the contact performance. In addition, the spring will fatigue during multiple plugging and unplugging processes, resulting in weakened elasticity or even failure, which will lead to poor contact. Poor contact will increase resistance, thereby generating more heat and exceeding the temperature rise standard, resulting in frequent safety accidents.

[0005] Therefore, those skilled in the art have proposed a low-voltage drawer cabinet electrical connection transmission mechanism to solve the problems raised by the background technology. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides an electrical connection transmission mechanism for a low-voltage drawer cabinet to solve the problem in the prior art that the dynamic plug-in of the drawer unit of the low-voltage drawer cabinet and the static plug-in of the low-voltage cabinet are easily aged in a normally high temperature environment, resulting in poor contact, and the temperature rise exceeds the standard and causes safety accidents.

[0007] A low-voltage drawer cabinet electrical connection transmission mechanism, comprising:

[0008] A back plate, which is installed at the rear side of the drawer and changes position as the drawer is pulled out, a first rectangular through hole is opened in the middle, first insulating fixing plates are symmetrically installed on both sides of the first rectangular through hole, and a copper busbar conductor terminal is connected between the two groups of first insulating fixing plates;

[0009] A partition board is installed on one side of the copper busbar inside the low-voltage cabinet. A second rectangular through-hole is opened in the middle of the partition board. On both sides inside the second rectangular through-hole, second insulating fixing plates are symmetrically installed. On the opposite sides of the two groups of second insulating fixing plates, flexible copper foil connectors penetrating the partition board are connected. The two groups of flexible copper foil connectors are connected to the left and right sides of the copper busbar through pressing plates. A lapping channel for inserting the conductor terminals of the copper busbar is formed between the two groups of flexible copper foil connectors; and

[0010] An auxiliary transmission crimping assembly is arranged on the opposite side of the backboard and the partition board, and is used for auxiliary crimping of the ends of the flexible copper foil connectors when the drawer is located inside the low-voltage cabinet.

[0011] Preferably, the auxiliary transmission crimping assembly includes a front clamping plate, a rear clamping plate, a first connecting rod, a second connecting rod, a third connecting rod, a first connecting column, a second connecting column and an insulating pressure rod. The front clamping plate and the rear clamping plate are respectively installed on the backboard and the partition board. On the partition board, two groups of first connecting columns symmetrically located below the rear clamping plate are rotatably arranged. One ends of the two groups of first connecting columns are connected with a first connecting rod. One ends of the two groups of first connecting rods are connected with an insulating pressure rod located on the side of the flexible copper foil connector. The other ends of the two groups of first connecting rods are movably connected with a second connecting rod. The tops of the two groups of second connecting rods are movably connected with a third connecting rod. The two groups of third connecting rods are in an up-and-down scissor-like abutment between the front clamping plate and the rear clamping plate, and the middle parts of the two groups of third connecting rods are rotatably connected through a second connecting column.

[0012] Preferably, two groups of guiding through-holes are opened on both the front clamping plate and the rear clamping plate, and the guiding through-holes are used for limiting the movement of the ends of the third connecting rod.

[0013] Preferably, a first pin head is arranged on the side of the connection part of the second connecting rod and the first connecting rod, and a second pin head is arranged at the top of the connection part of the second connecting rod and the third connecting rod.

[0014] Preferably, the first connecting rod is arranged in an L-shaped structure, and an assembly hole for the first pin head to move is opened on the vertical section of the first connecting rod.

[0015] Preferably, the third connecting rod is provided with a connection hole for the second pin head to pass through, and round wheels extending into the guiding through-holes are rotatably arranged at both ends of the third connecting rod.

[0016] Preferably, a connection groove for inserting the horizontal section of the first connecting rod is opened at the top of the side of the insulating pressure rod, and a reinforcing rib is arranged on the insulating pressure rod below the connection groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects: By installing an electrical connection and transmission structure on the rear panel of the drawer unit and the partition of the low-voltage cabinet drawer, which includes two parts. The first part is the electrical connection and conduction structure, consisting of a first insulating fixing plate, a copper busbar conductor terminal, a second insulating fixing plate, and a flexible copper foil connecting piece, completing the basic structure of the main circuit electrical connection. The overall uses the flexible copper foil connecting piece and the copper busbar conductor terminal to contact to complete the electrical connection of the drawer main circuit, and the flexible connection effectively reduces the contact internal resistance, making the three-phase temperature rise balanced and the equipment safer. The second part is the auxiliary transmission and crimping structure, consisting of two groups of first connecting rods, two groups of second connecting rods, two groups of third connecting rods, a front clamping plate, a rear clamping plate, and an insulating pressure rod and other structural parts, so that after the drawer retraction stroke ends, it drives the insulating pressure rod to press on the ends of the flexible copper foil connecting piece from both left and right sides, improving the connection force between the flexible copper foil connecting piece and the copper busbar conductor terminal, expanding the effective contact surface, and having fewer breakpoints as a whole, improving the line stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view structure diagram of the present invention;

[0019] Figure 2 is the rear view structure diagram of the present invention;

[0020] Figure 3 is the structure diagram of the present invention with the drawer removed;

[0021] Figure 4 is the structure diagram of the present invention with the back panel removed;

[0022] Figure 5 is the rear view structure diagram of the back panel of the present invention;

[0023] Figure 6 is the structure diagram of the present invention in the state where the drawer is pushed in and the main circuit is connected;

[0024] Figure 7 is the structure diagram of the auxiliary transmission and crimping assembly of the present invention when the drawer is pulled out;

[0025] Figure 8 For the present invention Figure 2 amplified structure diagram of part A;

[0026] Figure 9 For the present invention Figure 3 amplified structure diagram of part B.

[0027] In the figure:

[0028] 1. Backplane; 2. First rectangular through-hole; 3. First insulating fixing plate; 4. Copper busbar conductor terminal; 5. Partition; 6. Copper busbar; 7. Second rectangular through-hole; 8. Second insulating fixing plate; 9. Flexible copper foil connector; 10. Pressure plate; 11. Lapping channel; 12. Front clamping plate; 13. Rear clamping plate; 14. First connecting rod; 15. Second connecting rod; 16. Third connecting rod; 17. First connecting column; 18. Second connecting column; 19. Insulating pressure rod; 20. Guide through-slot; 21. First plug head; 22. Second plug head; 23. Assembly hole; 24. Connection hole; 25. Round wheel; 26. Connection slot; 27. Reinforcing rib; 28. Drawer. Specific embodiments

[0029] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0030] As shown in the attached Figure 1 to the attached Figure 9 figures:

[0031] The present invention provides a low-voltage drawer cabinet electrical connection and transmission mechanism, including a backplane 1, a partition 5 and an auxiliary transmission and crimping assembly. The backplane 1 is installed at the rear side of the drawer 28 and changes its position with the pulling and pushing of the drawer 28. A first rectangular through-hole 2 is opened in the middle of the backplane 1. On both sides inside the first rectangular through-hole 2, first insulating fixing plates 3 are symmetrically installed. A copper busbar conductor terminal 4 is connected between the two groups of first insulating fixing plates 3. The partition 5 is installed inside the low-voltage cabinet on one side of the copper busbar 6. A second rectangular through-hole 7 is opened in the middle of the partition 5. On both sides inside the second rectangular through-hole 7, second insulating fixing plates 8 are symmetrically installed. On the opposite sides of the two groups of second insulating fixing plates 8, flexible copper foil connectors 9 passing through the partition 5 are connected. The two groups of flexible copper foil connectors 9 are connected to the left and right sides of the copper busbar 6 through a pressure plate 10. A lapping channel 11 for inserting the copper busbar conductor terminal 4 is formed between the two groups of flexible copper foil connectors 9. An auxiliary transmission and crimping assembly is arranged on the opposite sides of the backplane 1 and the partition 5, and the auxiliary transmission and crimping assembly is used to assist in crimping the ends of the flexible copper foil connectors 9 when the drawer 28 is located inside the low-voltage cabinet.

[0032] Among them, when the drawer 28 retracts into the low-voltage cabinet, the drawer 28 will drive the backplane 1 to approach the partition 5. During the approaching process, the copper busbar conductor terminal 4 is driven to be inserted into the lapping channel 11 constructed by the flexible copper foil connectors 9. The copper busbar conductor terminal 4 is usually used to transmit large currents, and the lapping channel 11 provides a reliable electrical connection point. The contact of the main circuit electrical connection is completed.

[0033] It should be further noted that the flexible connection using the soft copper foil connector 9 reduces the contact internal resistance. Moreover, the soft copper foil has good electrical conductivity and flexibility, can adapt to copper bar conductor terminals 4 of different shapes and sizes, ensuring good electrical contact. The flexible connection can also reduce the problem of contact looseness caused by mechanical vibration or temperature change, improving the stability and reliability of the connection. The use of the first insulating fixing plate 3 and the second insulating fixing plate 8 provides necessary insulation protection for the copper bar conductor terminal 4 and the soft copper foil connector 9, preventing the current from directly contacting other metal parts of the drawer 28 cabinet or the operator, thus reducing the risk of electric shock.

[0034] Reference Figure 6 and Figure 7 , the auxiliary drive crimping assembly includes a front clamping plate 12, a rear clamping plate 13, a first connecting rod 14, a second connecting rod 15, a third connecting rod 16, a first connecting column 17, a second connecting column 18 and an insulating pressure rod 19. The front clamping plate 12 and the rear clamping plate 13 are respectively installed on the back plate 1 and the partition plate 5. Two sets of symmetric first connecting columns 17 are rotatably arranged on the partition plate 5 below the rear clamping plate 13. One end of the two sets of first connecting columns 17 is connected to a first connecting rod 14. One end of the two sets of first connecting rods 14 is connected to an insulating pressure rod 19 located on the side of the soft copper foil connector 9. The other end of the two sets of first connecting rods 14 is movably connected to a second connecting rod 15. The top ends of the two sets of second connecting rods 15 are movably connected to a third connecting rod 16. The two sets of third connecting rods 16 are in an upper and lower scissor-like abutment between the front clamping plate 12 and the rear clamping plate 13, and the middle parts of the two sets of third connecting rods 16 are rotatably connected through a second connecting column 18.

[0035] Reference Figure 5 and Figure 7 , two sets of guiding through slots 20 are opened on both the front clamping plate 12 and the rear clamping plate 13. The guiding through slots 20 are used for the end part of the third connecting rod 16 to move in a limited way.

[0036] Among them, when the drawer 28 retracts back to the low-voltage cabinet, it will drive the back plate 1 closer to the partition plate 5. During the approaching process, the back plate 1 will drive the front clamping plate 12 to move. During the moving process, one end of the two sets of third connecting rods 16 will enter the stroke of the guiding through slots 20 opened on the front clamping plate 12. As the drawer 28 gradually retracts, a pushing force will be applied to the two sets of third connecting rods 16. Under the action of the force, the two sets of third connecting rods 16 will rotate around the second connecting column 18, causing the other ends of the two sets of third connecting rods 16 to move in opposite directions in the two guiding through slots 20 on the front clamping plate 12. During the moving process, the two sets of second connecting rods 15 will be driven to move outwards. During the moving process of the two sets of second connecting rods 15, one end of the first connecting rod 14 will be pulled, causing the first connecting rod 14 to adaptively rotate around the first connecting column 17. During the rotating process, the other end of the first connecting rod 14 will drive the insulating pressure rod 19 to move, thereby pressing the soft copper foil connector 9 from both sides, making the soft copper foil connector 9 firmly connected to the copper bar conductor terminal 4.

[0037] Reference Figure 9 On the side of the connection between the second link 15 and the first link 14, a first pin head 21 is provided, and at the top of the connection between the second link 15 and the third link 16, a second pin head 22 is provided.

[0038] Among them, through the settings of the first pin head 21 and the second pin head 22, the connection positions between the second link 15 and the first link 14 and between the second link 15 and the third link 16 can be finely adjusted, and then can be adjusted according to the actual installation situation, improving the overall applicability.

[0039] Reference Figure 9 The first link 14 is set as an L-shaped structure, and an assembly hole 23 for the first pin head 21 to move is provided in the vertical section of the first link 14.

[0040] Among them, through the setting of the assembly hole 23, when one end of the second link 15 moves outward driven by the third link 16, it will drive the first pin head 21 to move in the assembly hole 23 and then drive the top of the vertical section of the first link 14 to move, that is, it plays a role in compensating for displacement and avoiding displacement interference.

[0041] Reference Figure 7 The third link 16 is provided with a connection hole 24 for the second pin head 22 to pass through, and round wheels 25 extending into the guide through groove 20 are rotatably provided at both ends of the third link 16.

[0042] Among them, through the setting of the round wheels 25, the friction when the third link 16 moves in contact with the back plate 1 and the partition 5 is reduced, improving the smoothness and stability of the overall movement.

[0043] Reference Figure 6 and Figure 7 On the top of the side of the insulating pressure rod 19, a connection groove 26 for the horizontal section of the first link 14 to insert is provided, and a reinforcing rib 27 is provided on the insulating pressure rod 19 below the connection groove 26.

[0044] Among them, through the connection groove 26, the connection area between the insulating pressure rod 19 and the first link 14 is enlarged, and through the reinforcing rib 27, the support for the connection part is improved, improving the stability of the connection between the two.

[0045] Working principle: When in use, by pushing the drawer 28 backward into the low-voltage cabinet, the drawer 28 drives the backplane 1 close to the partition 5. During the approaching process, on the one hand, the backplane 1 drives the copper busbar conductor terminal 4 to insert into the overlapping channel 11 constructed by the flexible copper foil connector 9, so that the two are in contact to complete the main circuit connection of the drawer 28. On the other hand, the backplane 1 drives the front clamping plate 12 to move. During the movement, the third link 16 of the front clamping plate 12 exerts a pushing force. Under this force, the two groups of third links 16 will rotate around the second connecting column 18. During the rotation, the two groups of second links 15 will move outward. At the same time of the movement, one end of the first link 14 will be pulled, so that the first link 14 adaptively rotates around the first connecting column 17 as the center. During the rotation, the other end of the first link 14 drives the insulating pressure rod 19 to move, so as to assist in pressing the flexible copper foil connector 9 from both sides, making the flexible copper foil connector 9 and the copper busbar conductor terminal 4 firmly connected. When the drawer 28 is pulled out from the low-voltage cabinet, it will drive the backplane 1 to separate from the partition 5. At this time, the third link 16 loses the squeezing force, and the insulating pressure rod 19 will relieve the pressing force on the end of the flexible copper foil connector 9, and at the same time drive the copper busbar conductor terminal 4 to move out between the two groups of flexible copper foil connectors 9, that is, disconnect the electrical connection of the main circuit. The whole device adopts a single-phase plug-in type, which helps to promote miniaturization, occupies less land, and has the greatest social benefits. The main circuit electrical connection of the drawer 28 is completed by the contact between the flexible copper foil connector 9 and the copper busbar conductor terminal 4, and the flexible connection effectively reduces the contact internal resistance, making the three-phase temperature rise balanced and the equipment safer. At the same time, an auxiliary pressing component with six-link cooperation is adopted to improve the connection force between the flexible copper foil connector 9 and the copper busbar conductor terminal 4, expand the effective contact surface, and improve the line stability.

[0046] The embodiments of the present invention are given for the purposes of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-voltage drawer cabinet electrical connection transmission mechanism, characterized in that: include: A back plate (1) is installed at the rear side of the drawer (28) and changes position as the drawer (28) is pulled out, a first rectangular through hole (2) is opened in the middle, first insulating fixing plates (3) are symmetrically installed on both sides of the first rectangular through hole (2), and a copper busbar conductor terminal (4) is connected between two sets of first insulating fixing plates (3); a partition plate (5) is installed in the low-voltage cabinet on one side of the copper busbar (6), a second rectangular through hole (7) is opened in the middle, second insulating fixing plates (3) are symmetrically installed on both sides of the second rectangular through hole (7) A fixed plate (8), two sets of second insulating fixed plates (8) are connected to opposite sides thereof with soft copper foil connectors (9) penetrating the partition plate (5), the two sets of soft copper foil connectors (9) are connected to the left and right sides of the copper bar (6) through a pressing plate (10), and a lap joint channel (11) for inserting the copper bar conductor terminal (4) is formed between the two sets of soft copper foil connectors (9); and an auxiliary transmission crimping assembly, which is arranged on the opposite side of the back plate (1) and the partition plate (5), and is used to press the soft copper foil connectors (9) when the drawer (28) is located inside the low-voltage cabinet. ) for auxiliary crimping of the end of the rear card plate (13); the auxiliary transmission crimping assembly comprises a front card plate (12), a rear card plate (13), a first connecting rod (14), a second connecting rod (15), a third connecting rod (16), a first connecting column (17), a second connecting column (18) and an insulating pressure rod (19); the front card plate (12) and the rear card plate (13) are respectively mounted on the back plate (1) and the partition plate (5); the partition plate (5) is rotatably provided with two groups of first connecting columns (17) symmetrically located below the rear card plate (13); the two groups of first connecting columns (17) are One end is connected to a first connecting rod (14), one end of the two groups of first connecting rods (14) is connected to an insulating pressure rod (19) located on the side of the soft copper foil connecting piece (9), the other end of the two groups of first connecting rods (14) is movably connected to a second connecting rod (15), the top ends of the two groups of second connecting rods (15) are movably connected to a third connecting rod (16), the two groups of third connecting rods (16) are scissor-fork-type abutted between the front card plate (12) and the rear card plate (13), and the middle parts of the two groups of third connecting rods (16) are rotatably connected via a second connecting column (18).

2. A low-voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 1, characterized in that: Two groups of guide through grooves (20) are provided on the front clamping plate (12) and the rear clamping plate (13). The guide through grooves (20) are used for limiting movement of the end of the third connecting rod (16).

3. A low-voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 1, characterized in that: A first latch head (21) is provided on the side of the connection between the second connecting rod (15) and the first connecting rod (14), and a second latch head (22) is provided on the top of the connection between the second connecting rod (15) and the third connecting rod (16).

4. A low-voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 3, characterized in that: The first connecting rod (14) is configured as an L-shaped structure, and a vertical section of the first connecting rod (14) is provided with an assembly hole (23) for the first latch head (21) to move.

5. The low-voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 3, characterized in that: The third connecting rod (16) is provided with a connecting hole (24) for the second latch head (22) to pass through, and both ends of the third connecting rod (16) are rotatably provided with round wheels (25) extending into the guide slot (20).

6. A low-voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 1, characterized in that: A connecting groove (26) for inserting the horizontal section of the first connecting rod (14) is provided at the top of the side surface of the insulating pressure rod (19), and a reinforcing rib (27) is provided on the insulating pressure rod (19) below the connecting groove (26).

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