Isolating switch of environment-friendly cabinet
By adopting a design of multiple ring-shaped springs with equal spacing in the environmental protection cabinet disconnector, the problem of uneven contact of the moving contact is solved, stable contact is achieved, the spring life is extended, and the risk of poor contact is reduced.
Patent Information
- Application Number
- CN202422899899.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-11-27
AI Technical Summary
The spring installed on the moving contact of the existing disconnector provides uneven pressure, which leads to increased contact resistance, severe heating, and may even damage the moving contact and the static contact.
The design adopts multiple springs with equal spacing in annular shapes. The combined structure of bolts, sleeves and limit columns ensures that each spring applies pressure evenly, maintaining stable contact between the moving contact and the static contact. The sleeve protects the spring from contamination and extends its service life.
It achieves uniform contact pressure between the moving contact piece and the static contact, improves contact stability, extends the service life of the spring, and reduces the risk of poor contact due to spring fatigue.
Smart Images
Figure CN223436454U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of isolating switches, in particular to an isolating switch for an environmental protection cabinet. Background Art
[0002] The isolating switch is an important electrical device in the environmental protection cabinet. Its main function is to isolate the power supply and ensure that there is a clear disconnection point between the cabinet and the live parts when repairing or inspecting the environmental protection cabinet, thereby ensuring the safety of the staff.
[0003] Springs are installed on the moving contacts of existing disconnectors to ensure stable contact pressure between the moving and stationary contacts to ensure good contact. There are usually two springs, one on each side of the moving contact. However, the pressure provided by a single spring on one side is uneven, which can increase contact resistance in certain areas, cause severe heating, and even damage the moving and stationary contacts. Utility Model Content
[0004] The purpose of the present utility model is to provide an environmental protection cabinet isolating switch to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an environmental protection cabinet isolating switch, comprising a frame, a static contact fixedly mounted on the frame, an operating shaft rotatably mounted on the frame, and a plurality of moving contact mechanisms arranged on the operating shaft, the moving contact mechanism comprising two moving contact pieces mounted on the operating shaft, the two moving contact pieces can rotate together with the operating shaft, a bolt is passed through the two moving contact pieces, one end of the bolt is threadedly connected to a nut, a sheath is symmetrically provided on the outer side of the bolt, a sleeve is provided inside the sheath, the sleeve is slidably mounted on the outer side of the bolt, a plurality of limiting holes equidistantly distributed in an annular shape are provided on the side of the sleeve close to the through-hole, springs are installed inside the plurality of limiting holes, the inner side wall of the sheath is integrally formed with a limiting column, one end of the limiting column extends to the inner side of the spring, a stop column is also provided on the outer side of the bolt, and the stop column is located between the two moving contact pieces.
[0006] As a preferred solution of the present invention, one side of the sheath is tightly pressed against the adjacent moving contact piece.
[0007] As a preferred solution of the present invention, a receiving groove is provided inside the sleeve, a second through hole is penetrated through the sleeve, the second through hole is communicated with the receiving groove, and the spring, sleeve and limiting column are all located inside the receiving groove.
[0008] As a preferred solution of the present invention, a first through hole is provided through the middle of the sleeve.
[0009] As a preferred solution of the present invention, the two movable contact pieces are penetrated by holes.
[0010] As a preferred solution of the present invention, the diameter of the blocking column is larger than the diameter of the through hole, and the diameters of the through hole, the second through hole and the first through hole are equal to the diameter of the bolt.
[0011] Compared with the prior art, the beneficial effect of the present invention is as follows: the present invention provides multiple springs that are evenly distributed in a ring shape. When the moving contact piece contacts the static contact, each spring contributes a certain amount of pressure, making the force applied to the moving contact piece more uniform, thereby jointly maintaining a stable contact pressure, ensuring good contact between the moving contact piece and the static contact, and improving contact stability. In addition, the use of multiple springs can reduce the deformation of a single spring, thereby extending the service life of the spring and reducing the risk of poor contact due to spring fatigue. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0013] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle;
[0014] Figure 3 It is a partial front cross-sectional view of the utility model;
[0015] Figure 4 For this utility model Figure 3 Enlarged view of point B in the middle;
[0016] Figure 5 This is an exploded view of the movable contact mechanism of the utility model;
[0017] Figure 6 This is a schematic diagram of the structure of the sleeve of the utility model;
[0018] Figure 7 This is a schematic structural diagram of the sheath of the utility model.
[0019] In the figure: 1, frame; 2, operating axis;
[0020] 3. Moving contact mechanism; 31. Moving contact piece; 32. Bolt; 33. Sheath; 34. Sleeve; 35. Stop column; 36. Nut; 37. Spring; 38. Limit column;
[0021] 4. Static contact; 5. First through hole; 6. Limiting hole; 7. Second through hole; 8. Accommodating groove; 9. Through hole. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0023] See also Figures 1 to 7 The utility model provides a technical solution: an environmental protection cabinet isolating switch, comprising a frame 1, a static contact 4 fixedly mounted on the frame 1, an operating shaft 2 rotatably mounted on the frame 1, and a plurality of moving contact mechanisms 3 arranged on the operating shaft 2, the moving contact mechanism 3 comprising two moving contact pieces 31 mounted on the operating shaft 2, the two moving contact pieces 31 can rotate together with the operating shaft 2, a bolt 32 is passed through the two moving contact pieces 31, one end of the bolt 32 is threadedly connected to a nut 36, a sheath 33 is symmetrically provided on the outside of the bolt 32, the sheath 33 is used to protect the spring 37 to prevent the spring 37 from being contaminated and prolong its service life, a sleeve 34 is provided inside the sheath 33, the sleeve 34 is slidably mounted on the outside of the bolt 32, and a plurality of limiting holes 6 are provided on the side of the sleeve 34 near the through-hole 9, and springs 37 are installed inside the plurality of limiting holes 6. The force applied by the piece 31 is more uniform. When the moving contact piece 31 contacts the static contact 4, each spring 37 will contribute a certain amount of pressure, thereby jointly maintaining a stable contact pressure, ensuring that the moving contact piece 31 and the static contact 4 are in good contact and improving contact stability. The use of multiple springs 37 can reduce the deformation of a single spring 37, thereby extending the service life of the spring 37 and reducing the risk of poor contact due to fatigue of the spring 37. The inner wall of the sheath 33 is integrally formed with a limit column 38. The limit column 38 and the limit hole 6 can both limit the spring 37 to prevent the spring 37 from deflecting during the extension and contraction process. One end of the limit column 38 extends to the inner side of the spring 37. A stop column 35 is also provided on the outside of the bolt 32. The stop column 35 is used to block the two moving contact pieces 31 to prevent the moving contact piece 31 from being too close under the action of the spring 37, resulting in failure to make normal contact with the static contact 4. The stop column 35 is located between the two moving contact pieces 31.
[0024] One side of the sheath 33 is pressed tightly against the adjacent moving contact piece 31 .
[0025] Among them, a accommodating groove 8 is provided inside the sleeve 33, a second through hole 7 is penetrated through the sleeve 33, a limiting hole 6 facilitates the bolt 32 to pass through the sleeve 33, the second through hole 7 is connected to the accommodating groove 8, and the spring 37, sleeve 34 and limiting column 38 are all located inside the accommodating groove 8.
[0026] A first through hole 5 is formed through the middle of the sleeve 34 . The first through hole 5 facilitates the bolt 32 to pass through the sleeve 34 , but the head of the bolt 32 cannot pass through the first through hole 5 .
[0027] The two moving contact pieces 31 are penetrated by through-holes 9 , which facilitate the bolts 32 to pass through the two moving contact pieces 31 .
[0028] Among them, the diameter of the blocking column 35 is larger than the diameter of the through hole 9, so that the blocking column 35 cannot pass through the through hole 9, so that the blocking column 35 can block the two moving contact pieces 31, and the diameters of the through hole 9, the second through hole 7 and the first through hole 5 are equal to the diameter of the bolt 32.
[0029] Specifically, when the moving contact piece 31 contacts the static contact 4, multiple springs 37 apply thrust to the sleeve 33 respectively, and each spring 37 contributes a certain thrust. The sleeve 33 applies thrust to the moving contact piece 31 to ensure that there is sufficient contact pressure between the moving contact piece 31 and the static contact 4 to ensure good contact.
[0030] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0031] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one such feature.
[0032] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.
[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An environmental protection cabinet isolating switch, comprising a frame (1), a static contact (4) fixedly mounted on the frame (1), an operating shaft (2) rotatably mounted on the frame (1), and a plurality of moving contact mechanisms (3) arranged on the operating shaft (2), characterized in that: The movable contact mechanism (3) comprises two movable contact pieces (31) mounted on the operating shaft (2), the two movable contact pieces (31) can rotate together with the operating shaft (2), a bolt (32) is provided between the two movable contact pieces (31), one end of the bolt (32) is threadedly connected with a nut (36), a sheath (33) is symmetrically provided on the outside of the bolt (32), a sleeve (34) is provided inside the sheath (33), and the sleeve (34) is slidably mounted on the bolt (3 2), a plurality of limiting holes (6) distributed in an annular shape and at equal intervals are provided on one side of the sleeve (34) close to the through hole (9), and a spring (37) is installed inside the plurality of limiting holes (6). A limiting column (38) is integrally formed on the inner wall of the sleeve (33), and one end of the limiting column (38) extends to the inner side of the spring (37). A blocking column (35) is also provided on the outer side of the bolt (32), and the blocking column (35) is located between the two moving contact pieces (31).
2. The environmental protection cabinet isolating switch according to claim 1, characterized in that: One side of the protective sleeve (33) is tightly pressed against the adjacent moving contact piece (31).
3. The environmental protection cabinet isolating switch according to claim 1, characterized in that: A receiving groove (8) is provided inside the sleeve (33), a second through hole (7) is provided through the sleeve (33), the second through hole (7) is communicated with the receiving groove (8), and the spring (37), sleeve (34) and limiting column (38) are all located inside the receiving groove (8).
4. The environmental protection cabinet isolating switch according to claim 3, characterized in that: A first through hole (5) is provided through the middle of the sleeve (34).
5. The environmental protection cabinet isolating switch according to claim 4, characterized in that: The two movable contact pieces (31) are penetrated by a through hole (9).
6. The environmental protection cabinet isolating switch according to claim 5, characterized in that: The diameter of the blocking column (35) is greater than the diameter of the through hole (9), and the diameters of the through hole (9), the second through hole (7) and the first through hole (5) are equal to the diameter of the bolt (32).