Monopole direct current contactor

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and discloses a unipolar direct-current contactor which comprises an upper shell, the upper shell is in the shape of a hollow rectangular box with the top and the bottom open, contacts are symmetrically and rotatably connected in a cavity of the upper shell, and a rectangular plate is fixedly connected on the wall surface of the upper shell at the position of the bottom of each contact in the cavity of the upper shell. The contact is rotationally connected to the top of the rectangular plate; the bottom of the upper shell is movably connected with a coil structure; the arc extinguish chamber is fixedly connected to the top of the upper shell, the arc extinguish chamber is in a hollow rectangular box shape with an open bottom, and a plurality of arc extinguish plates are uniformly and fixedly connected in a cavity of the arc extinguish chamber; the quick insertion structure is arranged on the side wall face of the upper shell and used for connecting the coil structure to the bottom of the upper shell, the quick insertion structure comprises connecting blocks, bullet chambers and clamping blocks, the connecting blocks are symmetrically and fixedly connected to the two side wall faces of the coil structure respectively, the bullet chambers are symmetrically and fixedly connected to the two side wall faces of the upper shell respectively, and the clamping blocks are elastically connected to the wall face of each bullet chamber; the top of the connecting block can penetrate through the symmetrical bullet chambers.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and in particular relates to a single-pole DC contactor. Background Art

[0002] Single-pole DC contactors are mainly used in circuits with a DC rated working current of 50A-400A and a rated working voltage of 48V. They are suitable for program-controlled power supplies or uninterruptible power supply systems to switch the main circuit. They are suitable for starting and stopping electric vehicles and battery vehicles, electric forklifts, traction locomotives, communication power supplies and other fields.

[0003] The prior art (publication number: CN214705819U) discloses a DC contactor, including an upper yoke, a lower yoke, a base, an arc extinguishing chamber and a coil assembly located between the upper yoke and the lower yoke. The lower yoke is U-shaped, and grooves are symmetrically arranged on two mutually parallel sides of the lower yoke.

[0004] In the prior art, the upper part of the device having contacts and arc extinguishing and the lower part having a coil structure are connected by aligning holes and then connected by bolts to facilitate disassembly and assembly of the device. Although the prior art is easy to disassemble and assemble, several bolts need to be tightened each time during installation, and this process also takes time, so the installation speed of the prior art is slow.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] In order to solve the above-mentioned technical problem of slow installation speed, the basic concept of the technical solution adopted by the utility model is:

[0007] A single-pole DC contactor, comprising:

[0008] The upper shell is in the shape of a hollow rectangular box with the top and bottom open. The cavity of the upper shell is symmetrically connected to the contacts. A rectangular plate is fixedly connected to the wall of the upper shell at the bottom of each contact in the cavity of the upper shell. The contact is rotatably connected to the top of the rectangular plate. The bottom of the upper shell is movably connected to the coil structure.

[0009] The arc extinguishing chamber is fixedly connected to the top of the upper shell, and is in the shape of a hollow rectangular box with an open bottom. A plurality of arc extinguishing plates are evenly and fixedly connected in the cavity of the arc extinguishing chamber;

[0010] A quick-insert structure is used to connect the coil structure to the bottom of the upper shell on the side wall of the upper shell. The quick-insert structure includes: a connecting block, a spring chamber and a clamping block. The connecting block is symmetrically fixedly connected to the two side walls of the coil structure, the spring chamber is symmetrically fixedly connected to the two side walls of the upper shell, the clamping block is elastically connected to the wall of each spring chamber, and the top of the connecting block can pass through the symmetrical spring chambers.

[0011] As a preferred embodiment of the present utility model, the connecting block is arrow-shaped composed of an isosceles triangle and a rectangle. The top of the connecting block can pass through between the symmetrically arranged elastic chambers. The clamping block is trapezoidal with a right angle, and the inclined surfaces of the symmetric clamping blocks can be respectively tangent to the inclined surfaces on both sides of the top of the connecting block.

[0012] As a preferred embodiment of the present utility model, the quick insertion structure further includes a bottom elastic plate, an elastic block, and a baffle. The bottom elastic plate is fixedly connected to the side wall surface of the upper shell at the bottom position of each elastic chamber respectively. The elastic block is fixedly connected to the top of the clamping block, and the baffle is fixedly connected to the wall surface of the clamping block opposite to the inclined surface of the clamping block.

[0013] As a preferred embodiment of the present utility model, the elastic chamber is in a U-shape with the opening facing downwards. The clamping block can slide between the bottom elastic plate and the elastic chamber, the elastic block is elastically connected by a spring within the opening of the elastic chamber, and the baffle contacts the outer wall surface of the elastic chamber.

[0014] As a preferred embodiment of the present utility model, the quick insertion structure further includes a dial bar and a limiting plate. The dial bar is fixedly connected to the side wall surface of the clamping block, the limiting plate is fixedly connected to the side wall surface of the elastic chamber, and the limiting plate is also fixedly connected to the wall surface of the bottom elastic plate. The limiting plates on the wall surfaces of the elastic chamber and the bottom elastic plate are symmetric to each other, and the dial bar can slide between the symmetric limiting plates.

[0015] As a preferred embodiment of the present utility model, a locking structure is arranged on the side wall surface of the connecting block. The locking structure includes a safety groove, a lower plate, a safety block, a lifting bar, a longitudinal plate, and a locking groove. The safety grooves are symmetrically opened on the side wall surface of the connecting block. The lower plate is elastically connected by a spring within the safety groove. The safety block is fixedly connected to the bottom of the lower plate. The lifting bar is fixedly connected to the side wall surface of the safety block. The longitudinal plates are symmetrically and fixedly connected to the wall surface of the connecting block within each safety groove. The locking groove is opened on the top of the clamping block.

[0016] As a preferred embodiment of the present utility model, the bottom of the safety block is triangular with a right angle. The inclined surface at the bottom of the safety block contacts the end of the clamping block. The locking groove can adapt to the shape of the bottom of the safety block. When the connecting block is clamped between the symmetric clamping blocks, the bottom of the safety block will enter the locking groove, and the lifting bar will slide between the symmetric longitudinal plates.

[0017] The present utility model has the following beneficial effects compared with the prior art:

[0018] 1. By setting the quick insertion structure, the coil structure can be quickly connected to the upper shell. Because the quick insertion structure connects and combines the coil structure and the upper shell by the clamping connection of the connecting block and the clamping block, and in this combination process, only the positions need to be aligned and directly inserted. Therefore, compared with the prior art, this solution is faster and more convenient during assembly.

[0019] 2. By setting up a locking structure, the position of the card block and the connecting block can be fixed after the upper shell and the coil structure are connected through the quick-insert structure, thereby preventing the coil structure from falling off from the bottom of the upper shell. Therefore, the locking structure can improve the stability of the quick-insert structure after the upper shell and the coil structure are combined.

[0020] The specific implementation modes of the present utility model are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the attached picture:

[0022] Figure 1 It is a three-dimensional diagram of the utility model;

[0023] Figure 2 It is an exploded perspective view of the upper shell and arc extinguishing chamber of the utility model;

[0024] Figure 3 This is an exploded perspective view of the coil structure and upper shell of the utility model;

[0025] Figure 4 This is an exploded view of the connected block wall structure of the utility model;

[0026] Figure 5 This is an exploded view of the internal structure of the bullet chamber and the bottom bullet plate cavity of the utility model.

[0027] In the figure: 20, upper shell; 21, contact; 22, arc extinguishing chamber; 23, arc extinguishing plate; 24, coil structure; 30, connecting block; 31, spring chamber; 32, bottom spring plate; 33, clamping block; 34, spring block; 35, baffle; 36, pull bar; 37, limit plate; 40, safety groove; 41, lower plate; 42, safety block; 43, lifting bar; 44, longitudinal plate; 45, locking groove. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, a single-pole DC contactor comprises:

[0030] The upper shell 20 is in the shape of a hollow rectangular box with the top and bottom open. The contacts 21 are symmetrically rotatably connected in the cavity of the upper shell 20. A rectangular plate is fixedly connected to the wall of the upper shell 20 at the bottom of each contact 21 in the cavity of the upper shell 20. The contact 21 is rotatably connected to the top of the rectangular plate. The bottom of the upper shell 20 is movably connected to the coil structure 24.

[0031] The arc extinguishing chamber 22 is fixedly connected to the top of the upper shell 20. The arc extinguishing chamber 22 is in the shape of a hollow rectangular box with an open bottom. A plurality of arc extinguishing plates 23 are evenly and fixedly connected in the cavity of the arc extinguishing chamber 22. When the symmetric contacts 21 are turned upwards, they will contact the arc extinguishing plates 23 in the arc extinguishing chamber 22, and thus the arcs generated by the symmetric contacts 21 will be extinguished by the plurality of arc extinguishing plates 23. This is the existing technology, so it will not be elaborated here.

[0032] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the quick-insert structure is on the side wall surface of the upper shell 20 for connecting the coil structure 24 to the bottom of the upper shell 20. The quick-insert structure includes: a connecting block 30, an elastic chamber 31 and a clamping block 33. The connecting blocks 30 are symmetrically and fixedly connected to the two side wall surfaces of the coil structure 24 respectively. The elastic chambers 31 are symmetrically and fixedly connected to the two side wall surfaces of the upper shell 20 respectively. The clamping blocks 33 are elastically connected to the wall surfaces of each elastic chamber 31. The top of the connecting block 30 can pass through between the symmetric elastic chambers 31.

[0033] As Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the connecting block 30 is in the shape of an arrow composed of an isosceles triangle and a rectangle. The top of the connecting block 30 can pass through between the symmetric elastic chambers 31. The clamping block 33 is in the shape of a right trapezoid. The inclined surfaces of the symmetric clamping blocks 33 can be tangent to the two side inclined surfaces of the top of the connecting block 30 respectively. The quick-insert structure further includes a bottom elastic plate 32, an elastic block 34 and a baffle 35. The bottom elastic plates 32 are fixedly connected to the side wall surfaces of the upper shell 20 at the bottom positions of each elastic chamber 31 respectively. The elastic blocks 34 are fixedly connected to the tops of the clamping blocks 33. The baffles 35 are fixedly connected to the wall surfaces of the clamping blocks 33 opposite to the inclined surfaces of the clamping blocks 33. The elastic chamber 31 is in the shape of a C with an open bottom. The clamping block 33 will slide between the bottom elastic plate 32 and the elastic chamber 31. The elastic block 34 will be elastically connected by a spring in the opening of the elastic chamber 31. The baffle 35 will contact the outer wall surface of the elastic chamber 31. The quick-insert structure further includes a dial bar 36 and a limit plate 37. The dial bar 36 is fixedly connected to the side wall surface of the clamping block 33. The limit plate 37 is fixedly connected to the side wall surface of the elastic chamber 31. The limit plate 37 is also fixedly connected to the wall surface of the bottom elastic plate 32. The limit plates 37 on the wall surfaces of the elastic chamber 31 and the bottom elastic plate 32 are symmetric to each other. The dial bar 36 can slide between the symmetric limit plates 37;

[0034] During specific use, first align the position of the coil structure 24 with the bottom of the upper shell 20, and then insert the coil structure 24 into the bottom of the upper shell 20. When the coil structure 24 is inserted upward, the connecting block 30 on each side will be inserted upward from between the symmetrical card blocks 33. When the inclined surface of the connecting block 30 contacts the inclined surface of the card block 33, the card block 33 will move in the opposite direction due to the resistance of the connecting block 30. The card block 33 will slide between the top of the bottom spring plate 32 and the spring chamber 31. The card block 33 will drive the spring block 34 to move at the same time. The spring on the wall of the spring block 34 will be compressed due to the movement of the spring block 34. The triangle at the top of the connecting block 30 passes through the symmetrical card blocks. When the spring block 33 is in contact with each other, the spring on the wall of the spring block 34 will push the spring block 34 in the original direction, thereby driving the top of the card block 33 to contact the triangular bottom of the top of the connecting block 30, and the assembly of the coil structure 24 and the upper shell 20 is completed. After the assembly of the coil structure 24 and the upper shell 20 is completed, the top of the coil structure 24 will be between the symmetrical contacts 21. When the coil structure 24 and the upper shell 20 need to be removed, the lever 36 is first moved between the symmetrical limit plates 37 in a direction away from the connecting block 30. When the lever 36 is moved, the card block 33 will be driven to move at the same time to cancel the card connection with the connecting block 30, and the coil structure 24 can be removed at this time.

[0035] In summary, by setting up a quick-insert structure, the coil structure 24 and the upper shell 20 can be quickly connected, because the quick-insert structure connects and combines the coil structure 24 and the upper shell 20 by means of a connecting block 30 and a clamping block 33, and in this combination process, it is only necessary to align the position and directly insert it, so compared with the prior art, this solution is faster and more convenient during assembly.

[0036] like Figure 4 and Figure 5 As shown, the side wall surface of the connecting block 30 is provided with a locking structure, which includes a safety groove 40, a lower plate 41, a safety block 42, a lifting strip 43, a longitudinal plate 44 and a locking groove 45. The safety groove 40 is symmetrically arranged on the side wall surface of the connecting block 30, the lower plate 41 is elastically connected in the safety groove 40 by a spring, the safety block 42 is fixedly connected to the bottom of the lower plate 41, the lifting strip 43 is fixedly connected to the side wall surface of the safety block 42, and the longitudinal plate 44 is symmetrically fixedly connected to the wall surface of the connecting block 30 in each safety groove 40. The locking groove 45 is arranged on the top of the clamping block 33. The bottom of the safety block 42 is in the shape of a right triangle. The inclined surface at the bottom of the safety block 42 will contact the end of the clamping block 33. The locking groove 45 can adapt to the shape of the bottom of the safety block 42. When the connecting block 30 is clamped between the symmetrical clamping blocks 33, the bottom of the safety block 42 will enter the locking groove 45, and the lifting strip 43 will slide between the symmetrical longitudinal plates 44.

[0037] When in use, when the symmetrical clamping block 33 and the connecting block 30 are clamped, the clamping block 33 will push the bottom of the safety block 42 upward when moving toward the connecting block 30, so that the safety block 42 drives the lower plate 41 to retract into the safety groove 40. When the clamping block 33 completes the clamping of the connecting block 30, the spring on the wall of the lower plate 41 drives the lower plate 41 to push the safety block 42 downward and the bottom of the safety block 42 enters the locking groove 45, thereby fixing the position of the clamping block 33. When it is necessary to cancel the locking of the clamping block 33, the lifting strip 43 can be pushed upward between the symmetrical longitudinal plates 44 to separate the bottom of the safety block 42 from the locking groove 45, thereby completing the unlocking of the clamping block 33.

[0038] To summarize, by setting up a locking structure, the position of the blocking block 33 and the connecting block 30 can be fixed after the upper shell 20 and the coil structure 24 are connected through the quick-insertion structure, thereby preventing the coil structure 24 from falling off from the bottom of the upper shell 20. Thus, the locking structure can improve the stability of the quick-insertion structure after the upper shell 20 and the coil structure 24 are combined.

[0039] Working principle: first align the position of the coil structure 24 with the bottom of the upper shell 20 and then insert the coil structure 24 into the bottom of the upper shell 20. When the coil structure 24 is inserted upward, the connecting block 30 on each side will be inserted upward from between the symmetrical card blocks 33. When the inclined surface of the connecting block 30 contacts the inclined surface of the card block 33, the card block 33 will move in the opposite direction due to the resistance of the connecting block 30. The card block 33 will slide between the top of the bottom spring plate 32 and the spring chamber 31. The card block 33 will drive the spring block 34 to move at the same time. The spring on the wall of the spring block 34 will be compressed due to the movement of the spring block 34. The triangle at the top of the connecting block 30 passes through the symmetrical card block 3 3, the spring on the wall of the spring block 34 will push the spring block 34 in the original direction, thereby driving the top of the card block 33 to contact the triangular bottom of the top of the connecting block 30, and the assembly of the coil structure 24 and the upper shell 20 is completed. After the coil structure 24 and the upper shell 20 are assembled, the top of the coil structure 24 will be between the symmetrical contacts 21. When the coil structure 24 and the upper shell 20 need to be removed, first, the selector 36 is moved between the symmetrical limit plates 37 in a direction away from the connecting block 30. When the selector 36 is moved, the card block 33 will be driven to move at the same time to cancel the card connection with the connecting block 30. At this time, the coil structure 24 can be removed.

[0040] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A single-pole DC contactor, characterized in that: Comprising: An upper shell (20), the upper shell (20) is in the shape of a hollow rectangular box with an open top and bottom. Inside the cavity of the upper shell (20), there are contact heads (21) rotatably connected symmetrically. On the wall surface of the upper shell (20) at the position of the bottom of each contact head (21) inside the cavity of the upper shell (20), there is a rectangular plate fixedly connected. The contact head (21) is rotatably connected to the top of the rectangular plate. The bottom of the upper shell (20) is movably connected with a coil structure (24); An arc extinguishing chamber (22), the arc extinguishing chamber (22) is fixedly connected to the top of the upper shell (20), the arc extinguishing chamber (22) is in the shape of a hollow rectangular box with an open bottom. Inside the cavity of the arc extinguishing chamber (22), there are a plurality of arc extinguishing plates (23) fixedly connected evenly; A quick plug structure, the quick plug structure is on the side wall surface of the upper shell (20) for connecting the coil structure (24) to the bottom of the upper shell (20). The quick plug structure includes: a connecting block (30), an elastic chamber (31) and a clamping block (33). The connecting block (30) is symmetrically and fixedly connected to the side wall surfaces on both sides of the coil structure (24) respectively. The elastic chamber (31) is symmetrically and fixedly connected to the side wall surfaces of the upper shell (20) respectively. The clamping block (33) is elastically connected to the wall surface of each elastic chamber (31). The top of the connecting block (30) can pass through between the symmetric elastic chambers (31).

2. The single-pole DC contactor according to claim 1, characterized in that: The connecting block (30) is in the shape of an arrow composed of an isosceles triangle and a rectangle. The top of the connecting block (30) can pass through between the symmetric elastic chambers (31). The clamping block (33) is in the shape of a right trapezoid. The inclined surfaces of the symmetric clamping blocks (33) can be tangent to the inclined surfaces on both sides of the top of the connecting block (30) respectively.

3. The single-pole DC contactor according to claim 1, characterized in that: The quick plug structure further includes a bottom elastic plate (32), an elastic block (34) and a baffle plate (35). The bottom elastic plate (32) is fixedly connected to the side wall surface of the upper shell (20) at the bottom position of each elastic chamber (31) respectively. The elastic block (34) is fixedly connected to the top of the clamping block (33). The baffle plate (35) is fixedly connected to the wall surface of the clamping block (33) opposite to the inclined surface of the clamping block (33).

4. The single-pole DC contactor according to claim 3, characterized in that: The elastic chamber (31) is in the shape of a reversed C with an open bottom. The clamping block (33) can slide between the bottom elastic plate (32) and the elastic chamber (31). The elastic block (34) is elastically connected by a spring inside the opening of the elastic chamber (31). The baffle plate (35) will contact the outer wall surface of the elastic chamber (31).

5. The single-pole DC contactor according to claim 3, characterized in that: The quick plug structure further includes a dial bar (36) and a limiting plate (37). The dial bar (36) is fixedly connected to the side wall surface of the clamping block (33). The limiting plate (37) is fixedly connected to the side wall surface of the elastic chamber (31). The limiting plate (37) is also fixedly connected to the wall surface of the bottom elastic plate (32). The limiting plates (37) on the wall surfaces of the elastic chamber (31) and the bottom elastic plate (32) are symmetric to each other. The dial bar (36) can slide between the symmetric limiting plates (37).

6. The single-pole DC contactor according to claim 5, characterized in that: The side wall surface of the connecting block (30) is provided with a locking structure, which comprises a safety groove (40), a lower plate (41), a safety block (42), a lifting strip (43), a longitudinal plate (44) and a locking groove (45); the safety groove (40) is symmetrically arranged on the side wall surface of the connecting block (30); the lower plate (41) is elastically connected in the safety groove (40) through a spring; the safety block (42) is fixedly connected to the bottom of the lower plate (41); the lifting strip (43) is fixedly connected to the side wall surface of the safety block (42); the longitudinal plate (44) is symmetrically fixedly connected to the wall surface of the connecting block (30) in each safety groove (40); and the locking groove (45) is arranged on the top of the locking block (33).

7. The single-pole DC contactor according to claim 6, characterized in that: The bottom of the safety block (42) is in the shape of a right triangle, the inclined surface of the bottom of the safety block (42) contacts the end of the clamping block (33), the locking groove (45) can adapt to the shape of the bottom of the safety block (42), and when the connecting block (30) is clamped between the symmetrical clamping blocks (33), the bottom of the safety block (42) enters the locking groove (45), and the lifting strip (43) slides between the symmetrical longitudinal plates (44).

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