Electric connection transmission mechanism of low-voltage drawer cabinet

Abstract

The invention belongs to the field of low-voltage drawer cabinets, and provides a low-voltage drawer cabinet electric connection transmission mechanism which comprises a back plate, a partition plate and an auxiliary transmission crimping assembly, the back plate is installed on the rear side of a drawer, the position of the back plate is changed along with drawing of the drawer, and a first rectangular through hole is formed in the middle of the back plate; first insulating fixing plates are symmetrically mounted on two sides in the first rectangular through hole; a copper bar conductor terminal is connected between the two groups of first insulating fixing plates; according to the invention, a basic structure of main loop electrical connection is completed through the copper bar conductor terminals and the soft copper foil connecting pieces, so that contact internal resistance is effectively reduced, three-phase temperature rise is balanced, and equipment is safer; therefore, the drawer can drive the insulating pressure rod to be crimped to the end of the soft copper foil connecting piece from the left side and the right side after the return stroke of the drawer is finished, the connecting force between the soft copper foil connecting piece and the copper bar conductor terminal is improved, the effective contact surface is enlarged, the overall breakpoints are few, and the circuit stability is improved.

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; 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.

[0003] 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.

[0004] 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

[0005] 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.

[0006] A low-voltage drawer cabinet electrical connection transmission mechanism, comprising: 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; A partition, which is installed in the low-voltage cabinet on one side of the copper busbar, with a second rectangular through hole in the middle, second insulating fixing plates are symmetrically installed on both sides of the second rectangular through hole, two groups of second insulating fixing plates are connected to opposite sides of the partition with soft copper foil connectors penetrating the partition, the two groups of soft copper foil connectors are connected to the left and right sides of the copper busbar through a pressing plate, and a lap channel for inserting the copper busbar conductor terminal is formed between the two groups of soft copper foil connectors; and The auxiliary transmission crimping assembly is arranged on the opposite side of the back plate and the partition plate, and is used for auxiliary crimping of the end of the soft copper foil connector when the drawer is located inside the low-voltage cabinet.

[0007] Preferably, the auxiliary transmission crimping assembly includes a front card plate, a rear card 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 card plate and the rear card plate are respectively mounted on the back plate and the partition. Two groups of first connecting columns symmetrically located below the rear card plate are rotatably arranged on the partition. One end of the two groups of first connecting columns is connected to the first connecting rod, one end of the two groups of first connecting rods is connected to the insulating pressure rod located on the side of the soft copper foil connector, the other end of the two groups of first connecting rods is movably connected to the second connecting rod, the top ends of the two groups of second connecting rods are movably connected to the third connecting rod, the two groups of third connecting rods are scissor-shaped and abutted between the front card plate and the rear card plate, and the middle parts of the two groups of third connecting rods are rotatably connected through the second connecting column.

[0008] Preferably, two groups of guide through grooves are provided on the front clamping plate and the rear clamping plate, and the guide through grooves are used for limiting movement of the end of the third connecting rod.

[0009] Preferably, a first latch head is provided on the side of the connection between the second connecting rod and the first connecting rod, and a second latch head is provided on the top of the connection between the second connecting rod and the third connecting rod.

[0010] Preferably, the first connecting rod is configured as an L-shaped structure, and a vertical section of the first connecting rod is provided with an assembly hole for the first latch head to move.

[0011] Preferably, the third connecting rod is provided with a connecting hole for the second plug head to pass through, and both ends of the third connecting rod are rotatably provided with round wheels extending into the guide through groove.

[0012] Preferably, a connecting groove for inserting the horizontal section of the first connecting rod is provided at the top of the side surface of the insulating pressure rod, and a reinforcing rib located below the connecting groove is provided on the insulating pressure rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects: an electrical connection transmission structure is added to the rear plate of the drawer unit and the partition of the low-voltage cabinet drawer, which includes two parts. The first part is an electrical connection conduction structure, which is composed of a first insulating fixed plate, a copper bus conductor terminal, a second insulating fixed plate and a soft copper foil connector, completing the basic structure of the main circuit electrical connection, and the overall use of soft copper foil connectors and copper bus conductor terminals to complete the electrical connection of the drawer main circuit, and the flexible connection effectively reduces the contact internal resistance, so that the three-phase temperature rise is balanced and the equipment is safer; the second part is an auxiliary transmission crimping structure, which is composed of two groups of first connecting rods, two groups of second connecting rods, two groups of third connecting rods, a front card plate, a rear card plate and an insulating pressure rod and other structural parts, so that after the drawer retracts, it drives the insulating pressure rod to be crimped to the end of the soft copper foil connector from the left and right sides, thereby improving the connection force between the soft copper foil connector and the copper bus conductor terminal, expanding the effective contact surface, and the overall breakpoints are small, thereby improving the line stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a main structural diagram of the present invention; Figure 2 It is a rear view structural diagram of the present invention; Figure 3 This is a structural diagram of the drawer of the present invention with the perspective removed; Figure 4 This is a structural diagram of the back plate of the present invention with the viewing angle removed; Figure 5 It is a rear view structural diagram of the back plate of the present invention; Figure 6 This is a structural diagram of the drawer of the present invention being pushed into the main circuit connected state; Figure 7 This is a structural diagram of the drawer extraction auxiliary transmission crimping assembly of the present invention; Figure 8 For the present invention Figure 2 A magnified structural diagram of part A; Fig. 9 For the present invention Figure 3 Enlarged structural diagram of part B.

[0015] In the figure: 1. Back plate; 2. First rectangular through hole; 3. First insulating fixing plate; 4. Copper busbar conductor terminal; 5. Partition plate; 6. Copper busbar; 7. Second rectangular through hole; 8. Second insulating fixing plate; 9. Soft copper foil connector; 10. Press plate; 11. Overlap channel; 12. Front card plate; 13. Rear card 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 groove; 21. First plug head; 22. Second plug head; 23. Assembly hole; 24. Connecting hole; 25. Round wheel; 26. Connecting groove; 27. Reinforcing rib; 28. Drawer. DETAILED DESCRIPTION

[0016] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0017] As attached Figure 1 To Attachment Fig. 9 As shown: The present invention provides an electrical connection transmission mechanism for a low-voltage drawer cabinet, comprising a back plate 1, a partition plate 5 and an auxiliary transmission crimping assembly. The back plate 1 is installed at the rear side of a drawer 28 and changes position as the drawer 28 is pulled out. A first rectangular through hole 2 is opened in the middle of the back plate 1. First insulating fixing plates 3 are symmetrically installed on both sides of the first rectangular through hole 2. A copper busbar conductor terminal 4 is connected between two groups of first insulating fixing plates 3. The partition plate 5 is installed in the low-voltage cabinet on one side of a copper busbar 6. A second rectangular through hole 7 is opened in the middle of the partition plate 5. The second rectangular through hole 7 Second insulating fixing plates 8 are symmetrically installed on both sides inside, and opposite sides of the two groups of second insulating fixing plates 8 are connected with soft copper foil connectors 9 that penetrate the partition 5. The two groups of soft copper foil connectors 9 are connected to the left and right sides of the copper bus 6 through a pressing plate 10. A lap channel 11 for inserting the copper bus conductor terminal 4 is formed between the two groups of soft copper foil connectors 9. An auxiliary transmission crimping assembly is arranged on the opposite side of the back plate 1 and the partition 5. The auxiliary transmission crimping assembly is used for auxiliary crimping of the end of the soft copper foil connector 9 when the drawer 28 is located inside the low-voltage cabinet.

[0018] Among them, when the drawer 28 retracts to the low-voltage cabinet, the drawer 28 will drive the back panel 1 close to the partition 5, and during the approach process, the copper bus conductor terminal 4 will be driven to insert into the overlapping channel 11 constructed by the soft copper foil connector 9. The copper bus conductor terminal 4 is usually used to transmit large currents, and the overlapping channel 11 provides a reliable electrical connection point. When the two are in contact, the electrical connection of the main circuit is completed.

[0019] It should be further explained that the flexible connection of the soft copper foil connector 9 reduces the contact internal resistance, and the soft copper foil has good conductivity and flexibility, and can adapt to copper bus conductor terminals 4 of different shapes and sizes to ensure good electrical contact. The flexible connection can also reduce the contact loosening problem caused by mechanical vibration or temperature change, improve the stability and reliability of the connection, and the use of the first insulating fixing plate 3 and the second insulating fixing plate 8 provides the necessary insulation protection for the copper bus 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, thereby reducing the risk of electric shock.

[0020] refer to Figure 6 and Figure 7The auxiliary transmission crimping assembly includes 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 5. Two groups of first connecting columns 17 symmetrically located below the rear card plate 13 are rotatably arranged on the partition 5. One end of the two groups of first connecting columns 17 is connected to the first connecting rod 14, and one end of the two groups of first connecting rods 14 is connected to the insulating pressure rod 19 located on the side of the soft copper foil connector 9. The other end of the two groups of first connecting rods 14 is movably connected to the second connecting rod 15, and the top of the two groups of second connecting rods 15 is movably connected to the 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 through the second connecting column 18.

[0021] refer to Figure 5 and Figure 7 Two sets of guide slots 20 are provided on the front clamping plate 12 and the rear clamping plate 13 , and the guide slots 20 are used for limiting the movement of the end of the third connecting rod 16 .

[0022] Among them, when the drawer 28 retracts to the low-voltage cabinet, it will drive the back panel 1 to approach the partition 5. During the approach process, the back panel 1 will drive the front card plate 12 to move. During the movement, one end of the two groups of third connecting rods 16 enters the guide groove 20 provided on the front card plate 12. As the drawer 28 gradually retracts, a pushing force will be applied to the two groups of third connecting rods 16. Under the force, the two groups of third connecting rods 16 will rotate around the second connecting column 18, so that the other ends of the two groups of third connecting rods 16 move in opposite directions in the two guide grooves 20 on the front card plate 12, and the two groups of second connecting rods 15 are driven to move outward during the movement. During the movement of the two groups of second connecting rods 15, one end of the first connecting rod 14 is pulled, so that the first connecting rod 14 rotates adaptively around the first connecting column 17 as the center. During the rotation, the other end of the first connecting rod 14 drives the insulating pressure rod 19 to move, thereby pressing the soft copper foil connector 9 from both sides, so that the soft copper foil connector 9 is firmly connected to the copper bus conductor terminal 4.

[0023] refer to Fig. 9 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 .

[0024] Among them, by setting the first latch head 21 and the second latch head 22, the connection positions of the second connecting rod 15 and the first connecting rod 14 and the second connecting rod 15 and the third connecting rod 16 can be fine-tuned, and then can be adjusted according to actual installation conditions, thereby improving the overall applicability.

[0025] refer to Fig. 9The 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.

[0026] Among them, through the setting of the assembly hole 23, when one end of the second connecting rod 15 moves outward under the drive of the third connecting rod 16, it will drive the first pin head 21 to move in the assembly hole 23 and then drive the top end of the vertical section of the first connecting rod 14 to move, thereby compensating for the displacement and avoiding displacement interference.

[0027] refer to Figure 7 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 groove 20.

[0028] The provision of the round wheel 25 reduces the friction force of the third connecting rod 16 when it moves in contact with the back plate 1 and the partition plate 5, thereby improving the smoothness and stability of the overall movement.

[0029] refer to Figure 6 and Figure 7 A connecting groove 26 for inserting the horizontal section of the first connecting rod 14 is provided at the top of the side of the insulating pressure rod 19 , and a reinforcing rib 27 located below the connecting groove 26 is provided on the insulating pressure rod 19 .

[0030] The connection groove 26 enlarges the connection area between the insulating pressure rod 19 and the first connecting rod 14, and the reinforcing ribs 27 improve the support of the connection and the stability of the connection between the two.

[0031] Working principle: when in use, by pushing the drawer 28 back into the low-voltage cabinet, the drawer 28 drives the back plate 1 close to the partition 5. During the approaching process, the back plate 1 will drive the copper bus conductor terminal 4 to be inserted into the overlapping channel 11 constructed by the soft 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 back plate 1 will drive the front card plate 12 to move. During the movement, the third connecting rod 16 of the front card plate 12 applies a pushing force. Under the force, the two groups of third connecting rods 16 will rotate around the second connecting column 18. During the rotation, the two groups of second connecting rods 15 will be driven to move outward. At the same time, one end of the first connecting rod 14 will be pulled, so that the first connecting rod 14 will adaptively rotate around the first connecting column 17 as the center. During the rotation, the other end of the first connecting rod 14 drives the insulating pressure rod 19 to move, thereby auxiliary pressing the soft copper foil connector 9 from both sides, so that the soft The copper foil connector 9 is firmly connected to the copper bus conductor terminal 4. When the drawer 28 is pulled out from inside and outside the low-voltage cabinet, it will drive the back plate 1 to separate from the partition 5. At this time, the third connecting rod 16 loses the force of being squeezed, and the insulating pressure rod 19 will release the crimping force on the end of the soft copper foil connector 9, and at the same time drive the copper bus conductor terminal 4 to move out between the two groups of soft copper foil connectors 9, that is, disconnect the electrical connection of the main circuit. The overall equipment adopts a single-phase plug-in type, which is conducive to miniaturization and promotion, occupies less space, and has the greatest social benefits. The electrical connection of the main circuit of the drawer 28 is completed by contacting the soft copper foil connector 9 and the copper bus conductor terminal 4, and the flexible connection effectively reduces the contact internal resistance, so that the three-phase temperature rise is balanced and the equipment is safer. At the same time, an auxiliary crimping component coordinated with a six-link rod is adopted to improve the connection force between the soft copper foil connector 9 and the copper bus conductor terminal 4, expand the effective contact surface, and improve the line stability.

[0032] The embodiments of the present invention are provided for the purpose 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 cannot be understood as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low-voltage drawer cabinet electrical connection transmission mechanism, characterized in that: include: A back plate (1) is mounted on 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 mounted 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 (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 (8) are symmetrically installed on both sides of the second rectangular through hole (7), two sets of second insulating fixing plates (8) are connected to opposite sides of the partition (5) with soft copper foil connectors (9) passing through the partition (5), the two sets of soft copper foil connectors (9) are connected to the left and right sides of the copper busbar (6) through a pressing plate (10), and a lap channel (11) for inserting the copper busbar conductor terminal (4) is formed between the two sets of soft copper foil connectors (9); and An auxiliary transmission crimping assembly is arranged on the opposite side of the back plate (1) and the partition plate (5), and is used for assisting crimping of the end of the soft copper foil connector (9) when the drawer (28) is located inside the low-voltage cabinet.

2. A low-voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 1, characterized in that: 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 a back plate (1) and a partition plate (5). Two groups of first connecting columns (17) symmetrically located below the rear card plate (13) are rotatably arranged on the partition plate (5). One end of the two groups of first connecting columns (17) are connected to There are first connecting rods (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-shaped and 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).

3. A low-voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 2, 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).

4. A low-voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 2, 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).

5. A low-voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 4, 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.

6. A low-voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 4, 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).

7. A low voltage drawer cabinet electrical connection transmission mechanism as claimed in claim 2, 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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