Switch unit
By using a slide rail structure in the switch unit to slide the moving contact, the problem of the rotation of the moving contact in the prior art occupying space is solved, and a larger arc extinguishing chamber and better arc extinguishing effect are achieved, which is suitable for miniaturization design. need.
Patent Information
- Application Number
- CN202311004189.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-10
- Publication Date
- 2025-02-18
AI Technical Summary
The switch units of the existing rotary isolating switch occupy a large amount of space due to the rotational movement of the moving contacts, resulting in limited space for the arc extinguishing chamber and static contacts, making it difficult to achieve a miniaturized design.
The sliding rail structure is adopted to enable the moving contact to slide on the slide rail of the bottom wall of the housing, and the arc extinguishing chamber is arranged on both sides of the slide rail, and the end of the slide rail extends to the vicinity of the side wall of the housing, and the moving contacts and The static contact contacts at the end.
The space occupation of dynamic contacts is reduced, the arc extinguishing chamber can be made larger, and the arc extinguishing effect is improved. The static contacts can be set up close to the arc extinguishing chamber to achieve better space utilization and arc extinguishing protection.
Smart Images
Figure CN119480511A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a switch unit. Background Art
[0002] The rotary disconnector is usually composed of an operating mechanism unit and several stacked switch units. The switch unit includes a unit housing, each of which is equipped with a pair of stationary contact assemblies and a rotatable moving contact module. The moving contact module is fixed on the rotating shaft, and the operating mechanism unit can operate the rotating shaft to rotate, thereby closing or opening the moving and stationary contacts.
[0003] In the switch unit of the existing rotary disconnector, the moving contact adopts the method of rotating motion to contact the static contact. The rotating motion of the moving contact occupies a circular space, which occupies most of the space of the switch unit, resulting in serious compression of the space for setting other components such as the arc extinguishing chamber and the static contact. In order to achieve sufficient opening distance and sufficient arc extinguishing effect, the switch unit needs to be made very large. Therefore, the internal layout of the existing switch unit is not conducive to the demand for miniaturized design. Summary of the invention
[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a switch unit.
[0005] To achieve the above object, the present invention adopts the following technical solutions:
[0006] A switch unit comprises: a shell, an arc extinguishing chamber, a moving contact, a static contact and a driving mechanism; the shell is provided with a slide rail for the moving contact to slide, the arc extinguishing chamber is arranged on both sides of the slide rail, and the end of the slide rail extends to the vicinity of the static contact so that the moving contact can contact the static contact at the end of the slide rail; the arc extinguishing chamber is provided with an opening, the opening faces the slide rail, and the length of the opening is not less than the track length of the moving contact sliding from the closing position to the opening position.
[0007] Preferably, one end of the arc extinguishing chamber is arranged close to the side wall of the shell, and is spaced from the side wall to form a static contact installation space; the static contact includes a contact body and a contact contact portion extending from the contact body toward the moving contact, and the opening area of the arc extinguishing chamber covers the position of the contact contact portion; the contact body is clamped in the static contact installation space, and is located between the arc extinguishing chamber and the side wall.
[0008] Preferably, the extension direction of the contact contact portion is inclined relative to the extension direction of the slide rail, and an end of the contact contact portion close to the moving contact is inclined in a direction away from the arc extinguishing chamber.
[0009] Preferably, the contact contact portion and the contact body are an integrally formed structure, and the contact contact portion is formed by integrally bending the contact body.
[0010] Preferably, a first limiting retaining wall is provided at a position of the housing adjacent to the slide rail, and a third limiting surface is provided at one end of the contact body adjacent to the slide rail, and the third limiting surface abuts against the first limiting retaining wall to form mutual limiting.
[0011] Preferably, a second limiting retaining wall which is inclined relative to the slide rail is further provided at a position connected to the first limiting retaining wall, and the contact portion is provided with a fourth limiting surface which abuts against the second limiting retaining wall.
[0012] Preferably, the contact portion has a triangular structure or a rounded structure in a direction toward the moving contact.
[0013] Preferably, the contact contact portion is located at the end of the sliding track of the moving contact, and is at least partially located in the opening of the arc extinguishing chamber.
[0014] Preferably, two slide rails are provided in the shell for dividing the shell into two areas, four arc extinguishing chambers are distributed on both sides of the two slide rails and form four static contact installation spaces with the side walls of the shell, four static contacts are respectively arranged in the four static contact installation spaces, two static contacts are located on the same side of the side wall, and the other two static contacts are located on the other opposite side of the side wall, two moving contacts are respectively arranged on the two slide rails, and the moving contact on one slide rail and the two static contacts on the same side of the side wall constitute a circuit switch.
[0015] Preferably, the housing is a rectangular structure, and the arc extinguishing chamber is also a rectangular structure.
[0016] Preferably, the contact body is further provided with a positioning notch, and the housing is provided with a positioning boss, and the stationary contact is positioned and installed by means of the positioning boss so that the positioning boss is inserted into the positioning notch.
[0017] Preferably, the slide rail is a linear slide rail.
[0018] In the switch unit of the present invention, the bottom wall of the shell is provided with a slide rail for the moving contact to slide, the arc extinguishing chamber is provided on both sides of the slide rail, and the end of the slide rail extends to the vicinity of the side wall of the shell. The space occupied by the moving contact sliding is smaller than the space occupied by the traditional rotation, so the arc extinguishing chamber can be made larger, and, compared with the traditional static contact, since the structure of the arc extinguishing chamber is not limited by the circular space, it can be directly extended to the edge side wall of the shell, and the static contact can be arranged close to the arc extinguishing chamber, and clamped between the arc extinguishing chamber and the side wall of the shell, to ensure that the moving contact can be protected by the arc extinguishing chamber during the entire movement stroke, greatly improving the arc extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic diagram of the layout of the switch unit of the present invention;
[0020] Figure 2 It is a structural schematic diagram of the static contact of the present invention;
[0021] Figure 3 is a schematic diagram of the structure of the static contact of the present invention (from another perspective);
[0022] Figure 4 It is a structural schematic diagram of the housing of the present invention;
[0023] Figure 5 It is a structural schematic diagram of the arc extinguishing chamber of the present invention.
[0024] 10 case 11 Sidewall 12 Stationary contact installation space 15 bottom wall 103 Slide rails 104 The first limiting retaining wall 105 Second limit retaining wall 107 Positioning boss 20 Interrupter 21 Opening 30 Stationary contact 301 Contact body 302 Contact contact part 3011 Positioning notch 311 The first limit surface 312 The second limiting surface 313 The third limiting surface 314 The fourth limit plane 40 Moving contact 50 link 60 Rotating frame 70 Drive shaft DETAILED DESCRIPTION
[0025] The following is a further description of the specific implementation of the switch unit of the present invention in conjunction with the embodiments given in the accompanying drawings. The switch unit of the present invention is not limited to the description of the following embodiments.
[0026] A rotary disconnector usually includes an operating unit and at least one switch unit, which are stacked together. The switch unit includes a housing, an arc extinguishing chamber, a moving contact, a static contact and a driving mechanism. The operating unit is provided with an output shaft, which is connected to the driving mechanism of the switch unit, and the contact driving mechanisms of adjacent switch units are connected. The output shaft of the operating unit rotates to drive the contact driving mechanism of the switch unit, and the contact driving mechanism drives the moving contact to cooperate with the static contact to achieve closing and opening of the switch unit.
[0027] like Figure 1 As shown, this embodiment provides a specific implementation of a switch unit, including: a housing 10, an arc extinguishing chamber 20, a moving contact 40, a stationary contact 30 and a driving mechanism.
[0028] In this embodiment, the housing 10 is provided with a slide rail 103 for the moving contact 40 to slide, and the arc extinguishing chamber 20 is arranged on both sides of the slide rail 103, and the end of the slide rail 103 extends to the vicinity of the static contact 30 so that the moving contact 40 can contact the static contact 30 at the end of the slide rail 103; the arc extinguishing chamber 20 is provided with an opening 21, and the opening 21 faces the slide rail 103, and the length of the opening 21 is not less than the trajectory length of the moving contact 40 sliding from the closing position to the opening position.
[0029] In one embodiment, the slide rail 103 is disposed on the bottom wall 15 of the housing 10, and the slide rail 103 can be a linear slide rail. In some special demand situations, the slide rail 103 can be an arc-shaped slide rail or a slide rail that is a combination of other curves and straight lines.
[0030] In this embodiment, the end of the slide rail 103 extends to the vicinity of the side wall 11 of the housing 10. One end of the arc extinguishing chamber 20 is arranged close to the side wall 11 of the housing 10, and forms a static contact installation space 12 with the side wall 11, and the other end of the arc extinguishing chamber 20 is adjacent to the starting end of the slide rail, that is, the arc extinguishing chamber is arranged on the entire stroke of the slide rail 103, and its overall length is at least greater than the stroke of the slide rail 103 (the length includes the static contact contact part and the arc striking part of the moving contact), that is, on the closing and opening path of the moving contact and the static contact, and is arranged on both sides of the closing and opening path, so that the arc extinguishing chamber 20 is maximized and the arc extinguishing effect is optimal.
[0031] It is worth noting that, within the structure of the existing switch unit, the moving contact needs a circular space for movement, while the shell is generally a rectangular structure, and the arc extinguishing chamber is usually arranged in a nearly triangular structure in the nearly triangular space separated by the four side walls of the shell and the circular space. The size of the arc extinguishing chamber is greatly limited, and because the position of this triangular space close to the static contact is very narrow, the arc extinguishing chamber structure cannot be placed. Therefore, there is still a certain distance between the arc extinguishing chamber and the static contact, and a good arc extinguishing effect cannot be achieved. This embodiment is different. Figure 5 As shown, the arc extinguishing chamber 20 structure can be made larger and can be arranged along the entire stroke of the moving contact, and its length L1 is close to or equal to the length of the slide rail 103.
[0032] Further, combined with Figure 2 and Figure 3As shown, the static contact 30 includes a contact body 301 and a contact contact portion 302 extending from the contact body 301 toward the moving contact 40; the contact body 31 is clamped in the static contact installation space 12, located between the arc extinguishing chamber 20 and the side wall 11, and the contact body 301 is provided with a first limiting surface 311 abutting against the surface of the side wall 11, and a second limiting surface 312 abutting against the end surface of the arc extinguishing chamber 20. The static contact 30 is arranged closely to the arc extinguishing chamber 20, so that the entire stroke of the moving contact 40 is protected by the arc extinguishing protection of the arc extinguishing chamber 20, and the arc can quickly enter the arc extinguishing chamber for arc extinguishing, thereby improving the arc extinguishing effect.
[0033] In this embodiment, the extension direction of the contact contact portion 302 is inclined relative to the extension direction of the slide rail 103, and the end of the contact contact portion 302 close to the moving contact 40 is inclined in a direction away from the arc extinguishing chamber 20. The inclined arrangement of the contact contact portion 302 makes it unnecessary to make the structure of the contact body 301 very long, and occupies less space.
[0034] In this embodiment, the contact contact portion 302 and the contact body 301 are integrally formed, and the contact contact portion 302 is formed by integrally bending the contact body 301. The integrally formed structure ensures the overall structural stability of the stationary contact.
[0035] In this embodiment, if Figure 4 As shown, the housing 10 is provided with a first limiting wall 104 near the slide rail 103 , and the contact body 301 is provided with a third limiting surface 313 at one end near the slide rail 103 , and the third limiting surface 313 abuts against the first limiting wall 104 to form mutual limiting.
[0036] In this embodiment, a second limiting retaining wall 105 is disposed adjacent to the first limiting retaining wall 104 and is tilted relative to the slide rail 103 . The contact contact portion 302 is provided with a fourth limiting surface 314 , which abuts against the second limiting retaining wall 105 .
[0037] In this embodiment, the contact portion 302 has a triangular structure or a rounded structure in the direction toward the moving contact 40. The triangular structure or the rounded structure forms an arc-striking edge and an arc-striking tip on the contact portion 302 to ensure an arc-striking effect.
[0038] In this embodiment, the contact portion 302 is located at the end of the sliding track of the moving contact 40 and is at least partially located in the opening of the arc extinguishing chamber 20, so that the arc extinguishing chamber 20 can achieve a better arc striking effect.
[0039] In this embodiment, two slide rails 103 are provided in the housing 10 to divide the housing 10 into two areas, four arc extinguishing chambers 20 are distributed on both sides of the two slide rails 103 and form four static contact installation spaces 12 with the side wall 11 of the housing 10, four static contacts 30 are respectively arranged in the four static contact installation spaces 12, two static contacts 30 are located on the same side of the side wall 11, and the other two static contacts 30 are located on the other opposite side wall 11, two moving contacts 40 are respectively arranged on the two slide rails 103, and the moving contact 40 on one slide rail 103 and the two static contacts 30 on the same side of the side wall 11 constitute a circuit switch. Compared with the existing switch unit, under the same volume of the switch unit, the present embodiment can realize the arrangement of two circuit switches, while the existing switch unit can only realize the arrangement of one circuit switch, thereby increasing the current carrying capacity of the switch. At the same time, in this embodiment, when the two circuit switches can be set, the housing structure of the switch unit will not be increased, and at the same time, a better arc extinguishing effect can be guaranteed.
[0040] In this embodiment, the housing 10 is a rectangular structure, the arc extinguishing chamber 20 is also a rectangular structure, the static contact installation space 12 formed between the arc extinguishing chamber 20 and the side wall 11 is also a rectangular gap structure, and the contact body 301 is a thin plate structure adapted to the rectangular gap structure. The static contact of the thin plate structure occupies less space and is more convenient to be arranged between the arc extinguishing chamber 20 and the side wall 11.
[0041] In this embodiment, the contact body is further provided with a positioning notch 3011, and the housing 10 is provided with a positioning boss 107. When the static contact 30 is installed, it is positioned and installed by the positioning boss 107, so that the positioning boss 107 is inserted into the positioning notch. The positioning notch 3011 and the positioning boss 107 can realize the overall positioning of the contact body 301, which is convenient for assembly and positioning and fixing after assembly.
[0042] As a specific implementation method, Figure 1 As shown, the driving mechanism may include a driving shaft 70, a rotating frame 60 connected to the driving shaft 70, and a connecting rod 50 hinged to the rotating frame 60. The rotating frame 60 and the connecting rod 50 constitute a two-link mechanism. One end of the connecting rod 50 is hinged to the rotating frame 60, and the other end of the connecting rod 50 is connected to the moving contact 40. The moving contact 40 is limited by the slide rail 103. Under the drive of the two-link mechanism, it moves linearly along the slide rail and contacts or disconnects with the static contact 30. The rotating frame 60 is installed on the transmission shaft 70, and its two ends protrude from the radial direction of the transmission shaft 70. The two ends of the rotating frame 60 are respectively connected to the two connecting rods 50 to form two two-link mechanisms, which are respectively used to drive the two moving contacts 40 to slide linearly. The rotating frame 60 and the transmission shaft 70 can be set as an integral part or separately and then assembled.
[0043] In the switch unit of the present invention, the bottom wall of the shell is provided with a slide rail for the moving contact to slide, the arc extinguishing chamber is provided on both sides of the slide rail, and the end of the slide rail extends to the vicinity of the side wall of the shell. The space occupied by the linear sliding of the moving contact is smaller than the space occupied by the traditional rotation, so the arc extinguishing chamber can be made larger, and, compared with the traditional static contact, since the structure of the arc extinguishing chamber is not limited by the circular space, it can be directly extended to the edge side wall of the shell, and the static contact can be arranged close to the arc extinguishing chamber, and clamped between the arc extinguishing chamber and the side wall of the shell, to ensure that the arc extinguishing protection of the arc extinguishing chamber can be obtained throughout the entire movement stroke of the moving contact.
[0044] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.
[0045] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A switch unit, comprising: A housing (10), an arc extinguishing chamber (20), a moving contact (40), a stationary contact (30) and a driving mechanism; characterized in that: The housing (10) is provided with a slide rail (103) for the moving contact (40) to slide, the arc extinguishing chamber (20) is arranged on both sides of the slide rail (103), and the end of the slide rail (103) extends to the vicinity of the stationary contact (30) so that the moving contact (40) can contact the stationary contact (30) at the end of the slide rail (103); The arc extinguishing chamber (20) is provided with an opening (21), the opening (21) faces the slide rail (103), and the length of the opening (21) is not less than the length of a track along which the moving contact (40) slides from a closing position to an opening position.
2. The switch unit according to claim 1, characterized in that: One end of the arc extinguishing chamber (20) is arranged close to the side wall (11) of the housing (10), and is spaced from the side wall (11) to form a stationary contact installation space (12); the stationary contact (30) comprises a contact body (301) and a contact contact portion (302) extending from the contact body (301) toward the moving contact (40), and the opening (21) of the arc extinguishing chamber (20) covers the position of the contact contact portion (302); The contact body (301) is clamped in the static contact installation space (12) and is located between the arc extinguishing chamber (20) and the side wall (11).
3. The switch unit according to claim 2, characterized in that: The extension direction of the contact contact portion (302) is inclined relative to the extension direction of the slide rail (103), and the end of the contact contact portion (302) close to the moving contact (40) is inclined in a direction away from the arc extinguishing chamber (20).
4. The switch unit according to claim 2, characterized in that: The contact contact portion (302) and the contact body (301) are an integrally formed structure, and the contact contact portion (302) is formed by integrally bending the contact body (301).
5. The switch unit according to claim 4, characterized in that: The housing (10) is provided with a first limiting wall (104) at a position adjacent to the slide rail (103), and the contact body (301) is provided with a third limiting surface (313) at one end adjacent to the slide rail (103), and the third limiting surface (313) abuts against the first limiting wall (104) to form mutual limiting.
6. The switch unit according to claim 5, characterized in that: A second limiting retaining wall (105) is also provided at a position connected to the first limiting retaining wall (104) and is arranged obliquely relative to the slide rail (103); the contact portion (302) is provided with a fourth limiting surface (314), and the fourth limiting surface (314) abuts against the second limiting retaining wall (105).
7. The switch unit according to claim 2, characterized in that: The contact portion (302) is in a triangular structure or a rounded structure in a direction toward the moving contact (40).
8. The switch unit according to claim 2, characterized in that: The contact contact portion (302) is located at the end of the sliding track of the moving contact (40), and is at least partially located in the opening of the arc extinguishing chamber (20).
9. The switch unit according to claim 1, characterized in that: Two slide rails (103) are provided in the housing (10) for dividing the housing (10) into two areas. Four arc extinguishing chambers (20) are distributed on both sides of the two slide rails (103) and form four stationary contact installation spaces (12) with the side wall (11) of the housing (10). Four stationary contacts (30) are respectively arranged in the four stationary contact installation spaces (12), wherein two stationary contacts (30) are located on the same side wall (11), and the other two stationary contacts (30) are located on the other opposite side wall (11). Two moving contacts (40) are respectively arranged on the two slide rails (103), and the moving contact (40) on one slide rail (103) and the two stationary contacts (30) on the same side wall (11) form a circuit switch.
10. The switch unit according to claim 9, characterized in that: The housing (10) is a rectangular structure, and the arc extinguishing chamber (20) is also a rectangular structure.