Drawer type coil device for contactor

Abstract

The utility model discloses a drawer type coil device for a contactor, which comprises a base, a coil framework and a drawer seat, the drawer seat comprises a box body and a bottom plate, the bottom plate is provided with a first fastener group for fixing the coil framework, and the drawer type coil device is characterized by further comprising a locking fastener which is movably arranged on the box body and is used for fixing the positions of the drawer seat and the base, the base is provided with a lock hole, and when the locking fastener moves, the locking fastener is provided with a first position which is partially inserted into the lock hole to lock the drawer seat and the base and a second position which is separated from the lock hole to release the locking of the drawer seat and the base, so that the coil can be pulled out of the contactor main body along with the drawer type coil device, and the coil can be conveniently and independently maintained and replaced; and meanwhile, the fastener convenient to replace is detachably mounted, so that the fastener can be replaced and maintained in time under the condition of fatigue fracture, the condition that the whole drawer seat is replaced due to damage of the fastener is avoided, and the maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of contactors, and particularly to a drawer-type coil device for a contactor. Background Art

[0002] A contactor is a widely used switching electrical appliance. Using electromagnetic, pneumatic or hydraulic principles, it realizes the on-off of the main circuit through a control circuit. The coil inside it generates magnetic force when energized. During use, the coil is prone to burnout. The main reasons include too high power supply voltage, overcurrent or overload, long-term operation, and damaged coil insulation, etc. When a failure caused by the above reasons occurs, maintenance is required.

[0003] Among the contactor products on the market currently, most of them cannot replace the coil of the contactor alone. When replacing the coil, it is necessary to replace all the parts that cooperate with the coil at the same time, and the cost is relatively high. And for some contactors that can replace the coil of the contactor alone in small quantities, the installation structure is very complex or the service life is short due to material limitations. For example, the invention patent mentioned in the application number CN201811453401.7 realizes the extraction and closing and locking of the drawer-type device by setting a movable buckle integrated with the bottom plate and relying on the elastic deformation of the movable buckle. Although it realizes the basic function of facilitating individual maintenance of the coil without overall disassembly and assembly, during use, the integrated movable buckle is prone to fatigue fracture during long-term use. Once damaged, the entire drawer seat needs to be replaced, and the cost is relatively high. Therefore, there is a certain room for improvement. Summary of the Invention

[0004] In view of the above problems, this application proposes a drawer-type coil device for a contactor. By setting a drawer-type coil device for a contactor, the coil can be pulled out of the contactor main body along with the drawer-type coil device, which is convenient for individual maintenance and replacement of the coil. At the same time, a detachable fastener that is convenient for replacement is installed, so that even when the fastener suffers from fatigue fracture, it can be replaced and repaired in time, avoiding the situation of replacing the entire drawer seat due to the damage of the fastener, and reducing the maintenance cost. The drawer-type coil device for a contactor is specifically realized through the following technical solutions:

[0005] A drawer-type coil device for a contactor includes: a base, a coil skeleton, and a drawer seat. The drawer seat is installed on the base. The coil skeleton includes a substrate, and the substrate of the coil skeleton is arranged on the drawer seat. The drawer seat includes: a box body and a bottom plate. A first fastener group for fixing the coil skeleton is arranged on the bottom plate. It also includes a locking fastener movably arranged on the box body for fixing the position of the drawer seat and the base. A lock hole is arranged on the base. When the locking fastener moves, it has a first position where part of it is inserted into the lock hole to lock the drawer seat and the base, and a second position where it disengages from the lock hole to release the locking between the drawer seat and the base.

[0006] Further setting: A sliding groove is provided on the box body. The locking fastener is slidably arranged in the sliding groove in a direction close to or away from the lock hole. Second buckles and locking protrusions are respectively arranged at the upper and lower ends of the sliding track of the locking fastener. A limiting protrusion corresponding to the second buckle is arranged on the inner wall of the sliding groove. When the locking protrusion is in the first position, it is inserted into the lock hole. When the locking protrusion is in the second position, it disengages from the lock hole. With this setting, the locking and unlocking sliding of the drawer seat can be realized by sliding the locking fastener, further enhancing the overall stability performance.

[0007] Further setting: The second buckles are set to two, and the two second buckles are symmetrically arranged on both sides of the locking fastener. With this setting, the reception is more uniform and the whole is more stable.

[0008] Further setting: A second inclined surface inclined towards the inside in the sliding direction of the drawer seat is provided on the locking protrusion. With this setting, the locking action is more labor-saving and convenient.

[0009] Further setting: A spring is also arranged between the upper end of the locking fastener and the sliding groove. One end of the pre-tightening force of the spring acts on the sliding groove, and the other end acts on the upper end of the locking fastener. A limiting guide groove is arranged vertically in the sliding groove. A limiting flange is arranged on the locking fastener. The limiting flange is slidably arranged in the limiting guide groove, and the upper end of the limiting guide groove forms an upper stroke limit for the limiting flange. With this setting, excessive pressure on the spring is prevented when lifting the locking fastener. At the same time, the setting of the spring can prevent the locking of the locking fastener from failing due to vibration and other factors, and the whole is more stable.

[0010] Further setting: A positioning convex block for spring positioning is also arranged at the upper end of the locking fastener. With this setting, the overall structure is more stable, plays a certain role in positioning the position of the spring, and prevents it from coming out.

[0011] Further setting: An operation slot for operation is also arranged on the outer-facing side of the locking fastener. With this setting, it is convenient to have a force application point during the unlocking operation, and the operation is convenient.

[0012] Further setting: The first fastener group includes a first buckle and a first limiting groove. The first buckle is set as an L-shaped protrusion, and an upwardly inclined installation inclined surface is provided at the outer end of the L-shaped protrusion. The opening directions of the first buckle and the first limiting groove are opposite to each other, and the distance between the first buckle and the first limiting groove is adapted to the substrate. When the substrate is arranged on the bottom plate, the edge of the substrate is simultaneously clamped in the first buckle and the first limiting groove. Both the first buckle and the first limiting groove are set as structures integrated with the bottom plate. One first buckle and one first limiting groove are set as a group, and two groups are provided. Through this setting, the coil skeleton is firmly connected to the drawer seat, the overall structure is firmly driven, the overall strength is improved, and the installation steps are reduced, making the fixing force of the substrate more uniform.

[0013] Further setting: A sliding guiding device is arranged between the bottom plate and the base. The sliding guiding device includes: a slide rail groove, a sliding block, a connecting rod, and a connecting block. Both the slide rail groove and the sliding block are symmetrically arranged in two. The slide rail groove is integrally arranged on the base, the sliding block is movably arranged in the slide rail groove, an installation groove is formed on the opposite side of the sliding block, the connecting block is arranged in the installation groove, and the connecting rod is arranged between the two connecting blocks and presses the connecting block tightly in the installation groove.

[0014] Further setting: The bottom plate is provided with a limiting protrusion corresponding to the position of the sliding block, and the sliding block is provided with a limiting card slot corresponding to the limiting protrusion. The bottom plate is connected to the sliding block by the way that the limiting protrusion is clamped in the limiting card slot.

[0015] In summary, for the drawer-type coil device of the contactor, by setting a drawer-type coil device for the contactor, the coil can be pulled out of the contactor main body along with the drawer-type coil device, which is convenient for separately overhauling and replacing the coil. At the same time, the fastener that can be detachably installed is convenient for replacement. Even if the fastener suffers from fatigue fracture, it can be replaced and repaired in time, avoiding the situation of replacing the entire drawer seat due to the damage of the fastener, reducing the maintenance cost. In addition, the locking fastener is set to be detachable, which can avoid the fracture problem caused by improper operation or mechanical fatigue reaching the limit during the use of the integral elastic fastener. By setting the spring to maintain the pre-tightened state, the spring can be replaced under necessary circumstances. Compared with the traditional setting, it has obvious advantages. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is an exploded view of the structure of the whole of the present utility model after removing the coil skeleton;

[0018] Figure 2 It is a sectional view of the whole of the present utility model;

[0019] Figure 3 It is a schematic diagram of the mating structure of the coil skeleton and the drawer base of the present utility model;

[0020] Figure 4 It is a sectional view of the drawer base of the present utility model;

[0021] Figure 5 For Figure 4 The enlarged view of part A in;

[0022] Figure 6 It is the explosion Figure 2

[0023] Figure 7 It is the explosion Figure 3 。

[0024] Among them, the reference numerals in the drawings are as follows:

[0025] 1. Base; 2. Coil skeleton; 3. Drawer base; 4. Substrate; 5. Box body; 6. Bottom plate; 7. First fastener group; 8. Locking fastener; 9. Lock hole; 10. Sliding groove; 11. Second buckle; 12. Locking protrusion; 13. Limiting protrusion; 14. Second inclined surface; 15. Spring; 16. Limiting guide groove; 17. Limiting flange; 18. Positioning protrusion; 19. Operation slot; 20. First buckle; 21. First limiting slot; 22. L-shaped protrusion; 23. Installation inclined surface; 24. Sliding guiding device; 26. Slide rail groove; 27. Sliding block; 28. Connecting rod; 29. Connecting block; 30. Installation slot; 31. Limiting protrusion; 32. Limiting card slot. Specific embodiments

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the following further details the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] The appearance of the above-mentioned terms at various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. What those skilled in the art explicitly and implicitly understand is that the embodiments described herein can be combined with other embodiments.

[0028] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0029] Please refer to Figures 1 to 5 , a drawer-type coil device for a contactor, comprising: a base 1, a coil bobbin 2 and a drawer base 3. The drawer base 3 is mounted on the base 1. The coil bobbin 2 includes a substrate 4, and the substrate 4 of the coil bobbin 2 is disposed on the drawer base 3. The drawer base 3 includes: a box body 5 and a bottom plate 6. A first fastener group 7 for fixing the coil bobbin 2 is disposed on the bottom plate 6. It is characterized in that: there is also a locking fastener 8 movably disposed on the box body 5 for fixing the positions of the drawer base 3 and the base 1. A lock hole 9 is disposed on the base 1. When the locking fastener 8 moves, it has a first position where a part of it is inserted into the lock hole 9 to lock the drawer base 3 and the base 1, and a second position where it disengages from the lock hole 9 to release the locking of the drawer base 3 and the base 1. By designing the base 1 and the drawer base 3, the coil device can be conveniently separated from the contactor body as a whole, and then the coil can be replaced individually. The user can disassemble and install it by hand, which is more convenient and fast, improving the user experience. In addition, the detachable locking fastener 8 is provided to avoid the fracture problem caused by improper operation or mechanical fatigue reaching the limit during the use of an integral elastic fastener. By setting the spring 15 to maintain the pre-tightened state, the spring 15 can be replaced in necessary cases, which has obvious advantages compared with the traditional setting.

[0030] Please refer to Figures 1 to 5, in this embodiment, a sliding groove 10 is provided on the box body 5. The locking fastener 8 is slidably arranged in the sliding groove 10 in a direction close to or away from the lock hole 9. Second buckles 11 and locking protrusions 12 are respectively arranged at the upper and lower ends of the sliding track of the locking fastener 8. A limiting protrusion 13 corresponding to the second buckle 11 is arranged on the inner wall of the sliding groove 10. When the locking protrusion 12 is in the first position, it is inserted into the lock hole 9. When the locking protrusion 12 is in the second position, it disengages from the lock hole 9. These two actions ensure the smooth movement and stable locking of the drawer seat 3. The second buckles 11 are provided in two numbers, and the two second buckles 11 are symmetrically arranged on both sides of the locking fastener 8. This setting ensures uniform stress while strengthening the strength of the second fastener, preventing the reduction of service life caused by uneven stress. The locking protrusion 12 is provided with a second inclined surface 14 that inclines inward in the sliding direction of the drawer seat 3. A spring 15 is further arranged between the upper end of the locking fastener 8 and the sliding groove 10. One end of the pre-tightening force of the spring 15 acts on the sliding groove 10, and the other end acts on the upper end of the locking fastener 8. A limiting guide groove 16 is arranged vertically in the sliding groove 10. A limiting flange 17 is arranged on the locking fastener 8. The limiting flange 17 is slidably arranged in the limiting guide groove 16, and the upper end of the limiting guide groove 16 forms an upper stroke limit for the limiting flange 17. It should be noted that the limiting flange 17 on the limiting guide groove 16 mainly limits the locking fastener 8 in the direction close to the spring 15, preventing excessive extrusion of the spring 15, resulting in irreversible deformation due to paralysis. A positioning protrusion 18 for positioning the spring 15 is further arranged at the upper end of the locking fastener 8. An operation slot 19 for operation is also arranged on the outer side of the locking fastener 8. The first fastener group 7 includes a first buckle 20 and a first limiting slot 21. The first buckle 20 is arranged as an L-shaped protrusion 22, and an installation inclined surface that inclines upward is arranged at the outer end of the L-shaped protrusion 22. The opening directions of the first buckle 20 and the first limiting slot 21 are opposite, and the distance between the first buckle 20 and the first limiting slot 21 is adapted to the substrate 4. When the substrate 4 is arranged on the bottom plate 6, the edge of the substrate 4 is simultaneously clamped in the first buckle 20 and the first limiting slot 21. The first buckle 20 and the first limiting slot 21 are both arranged as structures integrated with the bottom plate 6. One first buckle 20 and one first limiting slot 21 are arranged as a group, and two groups are provided. A limiting protrusion 31 is arranged on the bottom plate corresponding to the position of the sliding block 27. A limiting slot 32 corresponding to the limiting protrusion 31 is arranged on the sliding block 27. The bottom plate is connected to the sliding block 27 by the limiting protrusion 31 being clamped in the limiting slot 32.A sliding guiding device 24 is provided between the bottom plate and the base. The sliding guiding device 24 includes a slide rail groove 26, a sliding block 27, a connecting rod 28 and a connecting block 29. Both the slide rail groove 26 and the sliding block 27 are symmetrically arranged in two. The slide rail groove 26 is integrally provided on the base. The sliding block 27 is movably arranged in the slide rail groove 26. An installation groove 30 is formed on the opposite side of the sliding block 27. The connecting block 29 is arranged in the installation groove 30. The connecting rod 28 is arranged between the two connecting blocks 29 and presses the connecting block 29 against the installation groove 30.

[0031] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drawer-type coil device for a contactor, comprising: A base (1), a coil bobbin (2) and a drawer base (3), the drawer base (3) is mounted on the base (1), the coil bobbin (2) includes a substrate (4), and the substrate (4) of the coil bobbin (2) is disposed on the drawer base (3). The drawer base (3) includes: a box body (5) and a bottom plate (6), and a first fastener group (7) for fixing the coil bobbin (2) is disposed on the bottom plate (6). It is characterized in that: there is also a locking fastener (8) movably disposed on the box body (5) for fixing the positions of the drawer base (3) and the base (1). A lock hole (9) is disposed on the base (1). When the locking fastener (8) moves, it has a first position where a part of it is inserted into the lock hole (9) to lock the drawer base (3) and the base (1), and a second position where it disengages from the lock hole (9) to release the locking of the drawer base (3) and the base (1).

2. The drawer-type coil device for a contactor according to claim 1, characterized in that : A sliding groove (10) is disposed on the box body (5), and the locking fastener (8) is slidably disposed in the sliding groove (10) in a direction close to or away from the lock hole (9). Second buckles (11) and locking protrusions (12) are respectively disposed at the upper and lower ends of the sliding track of the locking fastener (8). A limiting protrusion (13) is disposed on the inner wall of the sliding groove (10) corresponding to the second buckle (11). The locking protrusion (12) is inserted into the lock hole (9) at the first position, and the locking protrusion (12) disengages from the lock hole (9) at the second position.

3. The drawer-type coil device for a contactor according to claim 2, characterized in that : The second buckles (11) are provided in two, and the two second buckles (11) are symmetrically disposed on both sides of the locking fastener (8).

4. A drawer-type coil device for a contactor according to claim 2, characterized in that : A second inclined surface (14) inclined inward in the sliding direction of the drawer base (3) is disposed on the locking protrusion (12).

5. The drawer-type coil device for a contactor according to claim 2, characterized in that : A spring (15) is further disposed between the upper end of the locking fastener (8) and the sliding groove (10). One end of the pre-tightening force of the spring (15) acts on the sliding groove (10), and the other end acts on the upper end of the locking fastener (8). A limiting guide groove (16) is disposed vertically in the sliding groove (10). A limiting flange (17) is disposed on the locking fastener (8), and the limiting flange (17) is slidably disposed in the limiting guide groove (16), and the upper end of the limiting guide groove (16) constitutes an upper stroke limit for the limiting flange (17).

6. A drawer-type coil device for a contactor according to claim 2, characterized in that : A positioning protrusion block (18) for positioning the spring (15) is further disposed on the upper end of the locking fastener (8).

7. A drawer-type coil device for a contactor according to claim 1, characterized in that : An operation slot (19) for operation is further disposed on the outer side surface of the locking fastener (8).

8. The drawer-type coil device for a contactor according to claim 1, characterized in that : The first fastener group (7) includes a first buckle (20) and a first limiting groove (21). The first buckle (20) is arranged as an L-shaped protrusion (22), and an upwardly inclined installation inclined surface is provided at the outer end of the L-shaped protrusion (22). The opening directions of the first buckle (20) and the first limiting groove (21) are opposite, and the distance between the first buckle (20) and the first limiting groove (21) is adapted to the substrate (4). When the substrate (4) is arranged on the bottom plate (6), the edge of the substrate (4) is simultaneously clamped in the first buckle (20) and the first limiting groove (21); both the first buckle (20) and the first limiting groove (21) are arranged as structures integral with the bottom plate (6); one first buckle (20) and one first limiting groove (21) are arranged as a group, and there are two groups.

9. A drawer-type coil device for a contactor according to claim 1, characterized in that : A sliding guiding device (24) is arranged between the bottom plate and the base. The sliding guiding device (24) includes: a slide rail groove (26), a sliding block (27), a connecting rod (28) and a connecting block (29). Both the slide rail groove (26) and the sliding block (27) are symmetrically arranged in two. The slide rail groove (26) is integrally arranged on the base. The sliding block (27) is movably arranged in the slide rail groove (26). An installation groove (30) is formed on the opposite side of the sliding block (27). The connecting block (29) is arranged in the installation groove (30), and the connecting rod (28) is arranged between the two connecting blocks (29) and presses the connecting block (29) tightly in the installation groove (30).

10. The drawer type coil device for a contactor according to claim 9, characterized in that : A limiting protrusion (31) is arranged at the position of the bottom plate corresponding to the sliding block (27), and a limiting card slot (32) is arranged at the sliding block (27) corresponding to the limiting protrusion (31). The bottom plate is connected to the sliding block (27) by the way that the limiting protrusion (31) is clamped in the limiting card slot (32).

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