Main shaft structure of load switch

Abstract

The utility model relates to the field of electrical switches, and particularly discloses a main shaft structure of a load switch, which comprises a shaft body and a moving contact group connected to the outer wall of the shaft body, the shaft body is connected with at least one moving contact group along the length direction, and each moving contact group comprises at least two contacts connected with the shaft body in the circumferential direction. The contact comprises a shell fixedly connected with the shaft body and a clamping piece arranged in the shell, contact arms are arranged on the two sides of the clamping piece, the ends of the contact arms on the two sides protrude towards the opposite sides to form the contact, and one side of the contact is connected with a protective cover plate used for thickening the shell. The main shaft structure of the load switch has the effect of enhancing the contact connection strength, and the service life is effectively prolonged.

Description

Technical Field

[0001] This application relates to the field of electrical switches, and more particularly to a spindle structure for a load switch. Background Technology

[0002] With the increase in urban electricity consumption, the power system needs to be inspected and maintained frequently. As one of the important electrical equipment, the reliability and durability of load switches are particularly important.

[0003] In load switches and combined electrical appliances, the operating mechanism drives the main shaft of the load switch to rotate via the output shaft, thereby realizing the opening, closing, and grounding operations of the load switch. Therefore, the insulated main shaft is a major component and key part of the load switch.

[0004] Chinese patent CN203826274U discloses a load switch and its insulated spindle. The insulated spindle includes a shaft body with a contact mounting arm for mounting a moving contact. The contact mounting arm extends radially outward along the shaft body. This insulated spindle effectively reduces the material usage of the shaft body and lowers production costs. However, the connection surface between the contact mounting arm and the internal contact of the load switch is prone to damage due to stress concentration. Utility Model Content

[0005] To improve the durability of the spindle, this application provides a spindle structure for a load switch.

[0006] The spindle structure of the load switch provided in this application adopts the following technical solution:

[0007] A load switch spindle structure includes a shaft and a moving contact assembly connected to the outer wall of the shaft. The shaft is connected to at least one moving contact assembly along its length. The moving contact assembly includes at least two contacts circumferentially connected to the shaft. Each contact includes a housing fixedly connected to the shaft and a clamping plate disposed within the housing. The clamping plate has contact arms on both sides, with the ends of the contact arms on both sides protruding towards opposite sides. A protective cover plate for thickening the housing is connected to one side of the contact.

[0008] By adopting the above technical solution, the rotating shaft drives the contacts to rotate, causing the contacts to connect and disconnect, thereby realizing the opening and closing operation of the switch. The moving contact group is arranged along the length of the shaft, realizing the multi-point touch function, which can simultaneously perform opening and closing operations on multiple circuits. The protective cover plate on one side of the contacts effectively strengthens the housing thickness, making the housing less prone to damage during closing operations, thereby increasing the reliability of the contacts and housing, and extending the service life of the main shaft.

[0009] Optionally, the protective cover has a slot for engaging with the housing at the end near the finger, and a gap is left between the inner wall of the slot and the housing.

[0010] By adopting the above technical solution, the protective cover can be stably fixed to the outside of the housing and is not easy to fall off during the rotation of the shaft. During opening and closing, a certain gap is left between the inner wall of the plug slot and the housing, allowing the protective cover to have a certain amount of room to swing, which facilitates the rotation of the main shaft; and it is also easy to install, improving the flexibility and convenience of assembly.

[0011] Optionally, the protective cover plate is provided with a buckle on the side away from the insertion slot, and the shaft body is provided with a fixing groove for the buckle to engage.

[0012] By adopting the above technical solution, the protective cover can be detachably connected. When the protective cover is damaged, it can be removed and replaced to continue using the spindle without having to replace the entire spindle, thus improving durability.

[0013] Optionally, a limiting groove is provided on one side of the shaft to limit the rotation angle of the shaft.

[0014] By adopting the above technical solution, in conjunction with the limiting post inside the load switch housing, the rotation angle of the shaft can be effectively limited, thereby preventing unstable circuit connection or even short circuit due to excessive rotation angle of the main shaft, and ensuring electrical safety.

[0015] Optionally, at least two partitions are connected to the side of the shaft away from the limiting groove, and a positioning groove is formed between adjacent partitions.

[0016] By adopting the above technical solution, the positioning groove formed by the interval between the partitions can be used to cooperate with other structures in the load switch for positioning. The presence of the partitions ensures the stability of the shaft in the axial direction, while not affecting its degree of freedom in the radial direction, making it difficult for the shaft to move along the length direction. As a result, the main shaft can stably realize the opening and closing operation, improving the stability of use.

[0017] Optionally, one end of the limiting groove extends outward to form an abutment plate, and a first reinforcing rib is connected between the abutment plate and the partition plate, with the sidewall of the first reinforcing rib fixedly connected to the shaft.

[0018] By adopting the above technical solution, the connection strength of the partition is improved, making it less prone to shaking, thereby ensuring the positioning effect.

[0019] Optionally, the end of the limiting groove away from the abutment plate is inclined to the side away from the shaft, and a pressure plate is fixedly connected between the outer wall of the limiting groove and the partition plate, and the side of the pressure plate near the shaft is fixedly connected to the shaft.

[0020] By adopting the above technical solution, the pressure plate can abut against the outer wall of the limiting groove, making it less likely for the side wall of the limiting groove to break when it comes into contact with other structures inside the load switch, thereby effectively improving the stability of use.

[0021] Optionally, a fixed seat is rotatably connected to one end of the shaft.

[0022] By adopting the above technical solution, the mounting base can be engaged and fixed with the inner wall of the load switch, thereby achieving the alignment and connection of the spindle and ensuring that the spindle can be accurately installed inside the load switch, thus guaranteeing the stability and safety of equipment operation.

[0023] Optionally, a rotating groove is provided at the end of the shaft away from the fixed seat, and a plurality of grooves are provided on the inner wall of the rotating groove.

[0024] By adopting the above technical solution, the inner wall of the groove can abut against other operating structures, thereby ensuring that the operating structure can stably rotate the shaft, thus realizing the opening and closing operation and improving the stability of use.

[0025] Optionally, a second reinforcing rib is provided between the outer wall of the housing and the shaft.

[0026] By adopting the above technical solution, the second reinforcing rib can provide additional support between the shell and the shaft to enhance the strength and stability of the overall structure, prevent deformation or breakage of the connection between the shell and the shaft due to external forces during use, and thus ensure that the shell can play a role in preventing the spread of electric arc.

[0027] In summary, this application has the following beneficial effects:

[0028] 1. By setting a protective cover plate, the thickness of the housing is effectively increased, so that the housing is not easily damaged due to contact with the stationary contacts inside the load switch during the opening and closing operation, ensuring that the housing can achieve the function of preventing arc spread, and improving durability and safety.

[0029] 2. By setting limit grooves and partitions, the rotation angle and movement range of the shaft are effectively limited, thereby ensuring that the moving contact assembly can achieve stable opening and closing during use, preventing unstable connection or even short circuit, and improving the stability and safety of use. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the main shaft structure of the load switch according to an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the contact structure according to an embodiment of this application;

[0032] Figure 3This is a cross-sectional view of the spindle structure of the load switch according to an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the limiting groove and partition plate according to an embodiment of this application;

[0034] Figure 5 This is a side view of the spindle structure of the load switch according to an embodiment of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Shaft; 11. Fixing groove; 12. Limiting groove; 121. Abutment plate; 13. Partition plate; 14. Positioning groove; 15. Pressure plate; 16. Fixing seat; 17. Rotating groove; 171. Groove; 2. Moving contact piece assembly; 3. Contact; 31. Housing; 32. Clamping piece; 321. Contact arm; 322. Contact finger; 33. Protective cover plate; 331. Insertion groove; 332. Buckle; 4. First reinforcing rib; 5. Second reinforcing rib. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0037] This application discloses a spindle structure for a load switch. (Refer to...) Figure 1 , Figure 2 The main shaft structure of the load switch includes a shaft 1 and a moving contact assembly 2 connected to the outer wall of the shaft 1. At least one moving contact assembly 2 is arranged along the length of the shaft 1, and the moving contact assembly 2 includes at least two contacts 3 for electrical connection, which are arranged circumferentially along the shaft 1. During opening and closing operations, rotating the shaft 1 causes the contacts 3 to rotate, thus connecting or disconnecting the switch.

[0038] Reference Figure 1 , Figure 2 The contact 3 includes a housing 31 and a clamping piece 32 disposed within the housing 31. The clamping piece 32 has contact arms 321 on both sides, with the contact arms 321 protruding towards each other to form contact fingers 322. A protective cover plate 33 is connected to one side of the contact 3 to thicken the housing 31. Both the protective cover plate 33 and the housing 31 are made of insulating material. The housing 31 encloses the clamping piece 32, effectively preventing arc propagation during closing and opening, thus ensuring electrical safety. During closing, the contact fingers 322 effectively contact and clamp with the connecting piece inside the load switch, ensuring stability during the electrical connection process. The protective cover plate 33 effectively thickens the housing 31, making it less prone to breakage due to external forces during closing, thereby extending the service life of the spindle and improving durability.

[0039] Reference Figure 2 , Figure 3The protective cover 33 has a insertion groove 331 on the side near the contact finger 322 for engaging with the housing 31. A gap is left between the inner wall of the insertion groove 331 and the housing 31. A buckle 332 is provided on the side of the protective cover away from the insertion groove 331. The shaft 1 has a fixing groove 11 for the buckle 332 to engage. The insertion groove 331 and the buckle 332 cooperate to ensure that the protective cover 33 can stably cover the outer wall of the housing 31, making it less likely for the shaft 1 to fall off during rotation, thus ensuring that the protective cover 33 can function stably. Secondly, the buckle 332 cooperates with the fixing groove 11 to achieve a detachable connection of the protective cover 33. If the protective cover 33 is damaged, the main shaft can continue to be used simply by removing and replacing the protective cover 33, without the need to replace the main shaft, thus improving durability.

[0040] Reference Figure 1 , Figure 4 A limiting groove 12 is formed on the outer wall of the shaft 1. The side wall of the limiting groove 12, away from its opening, is inclined outward from the shaft 1. The limiting groove 12 can abut against the limiting structure in the load switch, thereby limiting the rotation angle of the shaft 1, preventing the main shaft from rotating too much, which could lead to unstable circuit connection or even short circuit, ensuring electrical safety and improving the safety of use.

[0041] Reference Figure 1 , Figure 4 Two partitions 13 are fixedly connected to the side of the shaft 1 away from the limiting groove 12, and a positioning groove 14 is formed between adjacent partitions 13. The positioning groove 14 can be used in conjunction with other structures within the load switch for positioning. The presence of the partitions 13 ensures the stability of the shaft 1 in the axial direction, while not affecting its degree of freedom in the radial direction, making it difficult for the shaft 1 to move along the length direction, ensuring that the contacts 3 can stably open and close, and improving the stability of use.

[0042] Reference Figure 1 , Figure 4 One end of the limiting groove 12 extends outward to form an abutment plate 121. A first reinforcing rib 4 is connected between the abutment plate 121 and the partition 13. The side wall of the first reinforcing rib 4 is fixedly connected to the shaft 1. The first reinforcing rib 4 effectively improves the connection strength of the partition 13. The fixed connection between the first reinforcing rib 4 and the shaft 1 further enhances the supporting effect of the first reinforcing rib 4, thereby making the partition 13 less prone to shaking or deformation and ensuring the positioning effect.

[0043] Reference Figure 1 , Figure 4A pressure plate 15 is fixedly connected between the outer wall of the limiting groove 12 and the partition plate 13. The pressure plate 15 is fixedly connected to the shaft 1 on the side closest to the shaft 1. The pressure plate 15 can abut against the outer wall of the limiting groove 12. When the limiting groove 12 is effective in restricting the rotation of the shaft 1, the outer wall of the limiting groove 12 is not prone to breakage or deformation, thereby ensuring that the limiting groove 12 is effective and improving the stability and safety of use.

[0044] Reference Figure 1 , Figure 5 One end of the shaft 1 is rotatably connected to a fixed seat 16 that engages with the inner wall of the load switch, and the other end has a rotating groove 17, the inner wall of which has several grooves 171. The fixed seat 16 allows the shaft 1 to be fixed and rotated in the vertical direction, thereby ensuring that the contacts 3 can be stably connected when the shaft 1 rotates, ensuring stability and safety in use. The inner wall of the grooves 171 in the fixed groove 11 can abut against the operating structure of the load switch, thereby achieving effective force transmission, ensuring that the shaft 1 can be stably rotated to achieve opening and closing operations, and improving the stability of use.

[0045] Reference Figure 1 A second reinforcing rib 5 is provided between the outer wall of the housing 31 and the shaft 1. The second reinforcing rib 5 effectively improves the connection strength between the housing 31 and the shaft 1, enhances the stability of the overall structure, and prevents deformation or breakage of the connection between the housing 31 and the shaft 1 during use, ensuring that the housing 31 can effectively prevent arc propagation and improve durability.

[0046] The implementation principle of the main shaft structure of the load switch in this application embodiment is as follows: when the shaft 1 rotates, it drives each moving contact group 2 to rotate synchronously. The contact 3 in the moving contact group 2 makes contact or separates with the corresponding contact in the load switch through the contact arm 321, thereby realizing the connection or disconnection of the circuit. The protective cover plate 33 on one side of the housing 31 effectively strengthens the thickness of the housing 31 and covers the outer wall of the housing 31, so that the housing 31 is not easily damaged during the opening and closing process, and ensures that the housing 31 plays the role of preventing arc spread.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A main shaft structure for a load switch, comprising a shaft body (1) and a moving contact assembly (2) connected to the outer wall of the shaft body (1), characterized in that: The shaft (1) is connected to at least one movable contact piece group (2) along its length. The movable contact piece group (2) includes at least two contacts (3) circumferentially connected to the shaft (1). The contacts (3) include a housing (31) fixedly connected to the shaft (1) and a clip (32) disposed in the housing (31). The clip (32) has contact arms (321) on both sides. The ends of the contact arms (321) on both sides protrude to opposite sides to form contact fingers (322). A protective cover plate (33) for thickening the housing (31) is connected to one side of the contacts (3).

2. The spindle structure of the load switch according to claim 1, characterized in that: The protective cover (33) has a plug groove (331) for engaging with the housing (31) at one end near the finger (322), and there is a gap between the inner wall of the plug groove (331) and the housing (31).

3. The spindle structure of the load switch according to claim 2, characterized in that: The protective cover (33) has a buckle (332) on the side away from the insertion groove (331), and the shaft (1) has a fixing groove (11) for the buckle (332) to engage.

4. The spindle structure of the load switch according to claim 1, characterized in that: A limiting groove (12) is provided on one side of the shaft (1) to limit the rotation angle of the shaft (1).

5. The main shaft structure of the load switch according to claim 4, characterized in that: The shaft (1) is connected to at least two partitions (13) on the side away from the limiting groove (12), and a positioning groove (14) is formed between adjacent partitions (13).

6. The spindle structure of the load switch according to claim 5, characterized in that: One end of the limiting groove (12) extends outward to the shaft (1) to form an abutment plate (121). A first reinforcing rib (4) is connected between the abutment plate (121) and the partition plate (13). The side wall of the first reinforcing rib (4) is fixedly connected to the shaft (1).

7. The spindle structure of the load switch according to claim 6, characterized in that: The limiting groove (12) is inclined away from the abutment plate (121) and away from the shaft (1). A pressure plate (15) is fixedly connected between the outer wall of the limiting groove (12) and the partition plate (13). The pressure plate (15) is fixedly connected to the shaft (1) on the side close to the shaft (1).

8. The spindle structure of the load switch according to claim 1, characterized in that: One end of the shaft (1) is rotatably connected to a fixed seat (16).

9. The spindle structure of the load switch according to claim 8, characterized in that: The shaft (1) has a rotating groove (17) at the end away from the fixed seat (16), and the inner wall of the rotating groove (17) has several grooves (171).

10. The spindle structure of the load switch according to claim 1, characterized in that: A second reinforcing rib (5) is connected between the outer wall of the shell (31) and the shaft (1).

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