Cast aluminum frame and circuit breaker

Abstract

The utility model belongs to the field of electric switches, and particularly relates to a cast aluminum frame and a circuit breaker. In order to facilitate the casting of a breaker frame and the assembly of a breaker, the utility model provides a cast aluminum frame. The cast aluminum frame comprises an operating mechanism mounting frame and a fixing and sealing unit mounting frame, the operating mechanism mounting frame is located on one side of the fixing and sealing unit mounting frame, the fixing and sealing unit mounting frame is used for mounting a fixing and sealing unit, and the side face, away from one side of the fixing and sealing unit mounting frame, of the operating mechanism mounting frame is used for mounting an operating mechanism; the operating mechanism mounting rack further comprises an operating shaft avoiding hole or groove used for avoiding the operating shaft, a spring avoiding space used for avoiding the energy storage spring and a connecting part used for being connected with one end of the energy storage spring. The cast aluminum frame can be formed through one-time casting and is convenient to cast. The utility model also provides a circuit breaker adopting the integrated circuit breaker frame and the integrated operating mechanism. The circuit breaker frame is integrally formed, so that the three-phase consistency can be effectively ensured, and the circuit breaker is convenient to assemble.

Description

Technical Field

[0001] This utility model belongs to the field of electrical switches, and in particular relates to a cast aluminum frame and circuit breaker. Background Technology

[0002] In circuit breakers, core components such as the solid-state unit, operating mechanism, and current transformer need to be installed on the circuit breaker frame.

[0003] Currently, such as Figure 1 As shown, the conventional circuit breaker frame is a carbon steel welded structure, and the processing method is conventional sheet metal and welding. The circuit breaker frame includes a base 2 and an operating mechanism mounting plate 1 welded to one side of the base 2. The operating mechanism mounting plate 1 has an operating shaft through hole 1-1 for the operating shaft of the operating mechanism to pass through, an operating mechanism mounting hole 1-2 for mounting the operating mechanism, and an operating mechanism mounting rod 1-3 for mounting the operating mechanism. One end of the operating mechanism mounting rod 1-3 is connected to the operating mechanism mounting plate 1, and the other end is connected to the connecting plate of the operating mechanism. A crank arm is connected to the operating shaft, and the crank arm is connected to the energy storage spring. The four operating mechanism mounting rods 1-3 extend horizontally to form an installation space for mounting the energy storage spring between the operating mechanism mounting plate 1 and the connecting plate.

[0004] The base 2 is provided with a solid-sealing pole mounting hole 2-1, a current transformer bracket mounting hole 2-2, a shield mounting hole 2-3, and a pull rod through hole 2-4 for the pull rod of the solid-sealing unit to pass through (the solid-sealing pole mounting hole 2-1 and the pull rod through hole 2-4 together correspond to the solid-sealing unit mounting part), so as to install the solid-sealing unit, operating mechanism, current transformer and shield, and other components onto the circuit breaker frame.

[0005] When assembling a circuit breaker, firstly, components such as the sealing units and operating mechanisms are installed on the circuit breaker frame. Then, the circuit breaker frame is assembled into the enclosure. During assembly, the positioning grooves 2-5 on the base 2 need to be aligned with the circuit breaker enclosure. During installation, due to welding stress on the circuit breaker frame, the weight of each sealing unit, and poor positioning accuracy between components during welding, the deformation of the circuit breaker frame caused by the sealing units of each phase continuously accumulates. This results in significant deformation of the circuit breaker frame (especially the base 2), poor flatness and coaxiality, and difficulty in ensuring three-phase consistency, leading to assembly difficulties and low assembly efficiency. Simultaneously, the operating mechanism is a split type, with numerous operating mechanism mounting holes 1-2 on the operating mechanism mounting plate 1, further reducing assembly efficiency. Of course, depending on the components to be installed on the circuit breaker frame, other shapes of circuit breaker frames exist in the prior art.

[0006] For example, Chinese utility model patent with authorization announcement number CN204315448U and authorization announcement date of May 6, 2015 discloses a circuit breaker base frame, which is used to install the sealing unit and the operating mechanism, and the frame is also made of sheet metal bent and welded.

[0007] and Figure 1 The difference in the technical solutions shown is that the frame in the aforementioned utility model patent has a mounting frame for installing the operating mechanism, while Figure 1 The technical solution shown only includes the operating mechanism mounting plate 1, in Figure 1 When the technical solution shown is applied to a circuit breaker, the circuit breaker housing is used to protect the operating mechanism.

[0008] and Figure 1 What is the same in the technical solutions shown is that the frame in the above-mentioned utility model patent is also equipped with an operating mechanism and three sets of sealing units.

[0009] Meanwhile, if the existing circuit breaker frame is manufactured directly using the aluminum casting process, the casting process is complicated because of the limitations of the operating mechanism mounting rods 1-3, which must be cast in stages. Utility Model Content

[0010] The purpose of this utility model is to provide a cast aluminum frame to solve the technical problem that the casting of circuit breaker frames is quite troublesome.

[0011] The purpose of this utility model is also to provide a circuit breaker to solve the technical problems of difficult assembly and low assembly efficiency of circuit breakers.

[0012] To achieve the above objectives, the technical solution for the cast aluminum frame provided by this utility model is as follows:

[0013] A cast aluminum frame includes an integrally formed operating mechanism mounting frame and a fixed sealing unit mounting frame. The operating mechanism mounting frame is located on one side of the fixed sealing unit mounting frame. The upper end surface of the fixed sealing unit mounting frame is provided with a fixed sealing unit mounting hole for mounting the fixed sealing unit and a pull rod through hole for the pull rod of the fixed sealing unit to pass through. The side of the operating mechanism mounting frame away from the fixed sealing unit mounting frame forms an operating mechanism mounting surface for mounting the operating mechanism. The operating mechanism mounting frame also includes an operating shaft clearance hole or operating shaft clearance groove for avoiding the operating shaft of the operating mechanism, a spring clearance space for avoiding the energy storage spring of the operating mechanism, and a connecting part for directly or indirectly connecting to one end of the energy storage spring. The operating shaft clearance space and the spring clearance space are connected.

[0014] Furthermore, the mounting frame for the fixed sealing unit includes an inverted "U"-shaped section, which comprises a top plate and two upright plates mounted on either side of the top plate. In the direction of the tie rod perforations, the mounting frame also includes a bearing mounting beam, a reinforcing beam, and an end plate connected to both the top plate and the two upright plates. The top plate, the two upright plates, the operating mechanism mounting frame, the bearing mounting beam, the reinforcing beam, and the end plate together form three chambers, each corresponding to a different fixed sealing unit. Each chamber is equipped with a ring rib and a transverse rib connected to the lower surface of the top plate. Ribs and longitudinal ribs, and ring ribs are arranged around the mounting holes of the sealing unit and the through holes of the tie rod. The two ends of the longitudinal ribs are connected to two vertical plates or to the ring ribs and one vertical plate. One end of the transverse ribs is connected to the ring ribs, and the other end is connected to the operating mechanism mounting frame, bearing mounting beam, reinforcing beam or end plate to enhance the structural strength of the sealing unit mounting frame. The bearing mounting beam and reinforcing beam are provided with grooves for the operating shaft to pass through. The end plate is provided with grooves or through holes for the operating shaft to pass through. The bearing mounting beam and end plate are also used to install bearings for supporting the operating shaft.

[0015] Furthermore, reinforcing boots are provided at the connection points between the transverse ribs and the corresponding operating mechanism mounting brackets, bearing mounting beams, reinforcing beams, or end plates to increase the contact area.

[0016] Furthermore, reinforcing boots are provided at the connection between the longitudinal ribs and the vertical slabs to increase the contact area.

[0017] Furthermore, the connection between the bearing mounting beam and at least one vertical plate is provided with a reinforcing shoe to increase the contact area.

[0018] Furthermore, the reinforcing boot includes a first reinforcing block connected to the lower surface of the corresponding transverse rib, longitudinal rib, or bearing mounting beam, the lower surface of the first reinforcing block being an arc surface or a slope surface.

[0019] Furthermore, in the direction perpendicular to the corresponding transverse rib, longitudinal rib, or bearing mounting beam, the reinforcing shoe also includes a second reinforcing block connected to both sides of the transverse rib, longitudinal rib, or bearing mounting beam, wherein the side of the second reinforcing block away from the corresponding transverse rib, longitudinal rib, or bearing mounting beam is an arc surface or a slope.

[0020] Furthermore, a reinforced chamfer is provided at the connection between the end plate and the upright plate, and a reinforced chamfer is also provided at the connection between the operating mechanism mounting bracket and the upright plate.

[0021] Furthermore, the spring clearance space is a spring clearance groove or spring clearance hole provided on the upper end face of the operating mechanism mounting bracket.

[0022] The beneficial effects of the cast aluminum frame provided by this utility model are as follows: The cast aluminum frame in this utility model is a pioneering invention. In this utility model, the cast aluminum frame is integrally cast using a casting aluminum process, resulting in better flatness and coaxiality, making it easier to ensure three-phase consistency. This facilitates the assembly of the circuit breaker, improves the assembly efficiency of the circuit breaker, and enhances the main circuit resistance and partial discharge value of the circuit breaker.

[0023] To facilitate casting, the structure of the cast aluminum frame in this invention has also been changed. The cast aluminum frame does not include the operating mechanism mounting rod. At the same time, to avoid interference between the cast aluminum frame and the energy storage spring and to ensure the proper installation of the energy storage spring, the cast aluminum frame includes a completely new operating mechanism mounting bracket.

[0024] In actual circuit breaker assembly, the operating mechanism is mounted on the operating mechanism mounting bracket using the operating mechanism mounting surface, and the sealing unit is mounted on the sealing unit mounting frame using the sealing unit mounting holes and tie rod through holes. The operating shaft clearance space is used to allow clearance for the operating shaft, and the spring clearance space is used to allow clearance for the energy storage spring. The operating shaft clearance space and the spring clearance space are connected to avoid interference between the energy storage spring and the operating mechanism mounting bracket, ensuring that one end of the energy storage spring is connected to the crank arm on the operating shaft, and the other end is connected to the connecting part. These measures ensure the proper installation of the energy storage spring.

[0025] To achieve the above objectives, the technical solution of the circuit breaker provided by this utility model is as follows:

[0026] A circuit breaker includes a circuit breaker frame, an operating mechanism mounted on the circuit breaker frame, and a fixed sealing unit. The circuit breaker frame includes an integrally formed operating mechanism mounting frame and a fixed sealing unit mounting frame. The operating mechanism mounting frame is located on one side of the fixed sealing unit mounting frame, and the fixed sealing unit is mounted on the fixed sealing unit mounting frame. The operating mechanism is an integral operating mechanism, and the integral operating mechanism is mounted on the side of the operating mechanism mounting frame away from the fixed sealing unit mounting frame. The operating mechanism mounting frame also includes an operating shaft clearance hole or operating shaft clearance groove for clearance of the operating shaft of the operating mechanism, a spring clearance space for clearance of the energy storage spring of the operating mechanism, and a connecting part directly or indirectly connected to one end of the energy storage spring. The operating shaft clearance space and the spring clearance space are connected.

[0027] Furthermore, the circuit breaker frame is a cast aluminum frame, and the upper end surface of the solid seal unit mounting frame is provided with a solid seal unit mounting hole for mounting the solid seal unit and a tie rod through hole for the tie rod of the solid seal unit to pass through.

[0028] Furthermore, the mounting frame for the fixed sealing unit includes an inverted "U"-shaped section, which comprises a top plate and two upright plates mounted on either side of the top plate. In the direction of the tie rod perforations, the mounting frame also includes a bearing mounting beam, a reinforcing beam, and an end plate connected to both the top plate and the two upright plates. The top plate, the two upright plates, the operating mechanism mounting frame, the bearing mounting beam, the reinforcing beam, and the end plate together form three chambers, each corresponding to a different fixed sealing unit. Each chamber is equipped with a ring rib and a transverse rib connected to the lower surface of the top plate. Ribs and longitudinal ribs, and ring ribs are arranged around the mounting holes of the sealing unit and the through holes of the tie rod. The two ends of the longitudinal ribs are connected to two vertical plates or to the ring ribs and one vertical plate. One end of the transverse ribs is connected to the ring ribs, and the other end is connected to the operating mechanism mounting frame, bearing mounting beam, reinforcing beam or end plate to enhance the structural strength of the sealing unit mounting frame. The bearing mounting beam and reinforcing beam are provided with grooves for the operating shaft to pass through. The end plate is provided with grooves or through holes for the operating shaft to pass through. The bearing mounting beam and end plate are also used to install bearings for supporting the operating shaft.

[0029] Furthermore, reinforcing boots are provided at the connection points between the transverse ribs and the corresponding operating mechanism mounting brackets, bearing mounting beams, reinforcing beams, or end plates to increase the contact area.

[0030] Furthermore, reinforcing boots are provided at the connection between the longitudinal ribs and the vertical slabs to increase the contact area.

[0031] Furthermore, the connection between the bearing mounting beam and at least one vertical plate is provided with a reinforcing shoe to increase the contact area.

[0032] Furthermore, the reinforcing boot includes a first reinforcing block connected to the lower surface of the corresponding transverse rib, longitudinal rib, or bearing mounting beam, the lower surface of the first reinforcing block being an arc surface or a slope surface.

[0033] Furthermore, in the direction perpendicular to the corresponding transverse rib, longitudinal rib, or bearing mounting beam, the reinforcing shoe also includes a second reinforcing block connected to both sides of the transverse rib, longitudinal rib, or bearing mounting beam, wherein the side of the second reinforcing block away from the corresponding transverse rib, longitudinal rib, or bearing mounting beam is an arc surface or a slope.

[0034] Furthermore, a reinforced chamfer is provided at the connection between the end plate and the upright plate, and a reinforced chamfer is also provided at the connection between the operating mechanism mounting bracket and the upright plate.

[0035] Furthermore, the spring clearance space is a spring clearance groove or spring clearance hole provided on the upper end face of the operating mechanism mounting bracket.

[0036] The beneficial effects of the circuit breaker provided by this utility model are as follows: The circuit breaker in this utility model is an improved invention. The main difference between this utility model and the prior art is that in the prior art, the circuit breaker frame is a welded carbon steel structure, while in this utility model, the circuit breaker frame is integrally formed. Therefore, the flatness and coaxiality of the circuit breaker frame are better, making it easier to ensure three-phase consistency. This facilitates the assembly of the circuit breaker, improves the assembly efficiency, and reduces the main circuit resistance and partial discharge value of the circuit breaker.

[0037] In actual circuit breaker assembly, the integrated operating mechanism is installed on the side of the operating mechanism mounting bracket away from the fixed-seal unit mounting frame, and the fixed-seal unit is installed on the fixed-seal unit mounting frame. The operating shaft clearance space is used to avoid interference with the operating shaft, and the spring clearance space is used to avoid interference with the energy storage spring. The operating shaft clearance space and the spring clearance space are connected to prevent interference between the energy storage spring and the operating mechanism mounting bracket, and ensure that one end of the energy storage spring is connected to the crank arm on the operating shaft, and the other end is connected to the operating mechanism mounting bracket. These measures ensure the proper installation of the energy storage spring, and the integrated operating mechanism improves the circuit breaker assembly efficiency. Attached Figure Description

[0038] Figure 1 This is a structural schematic diagram of an existing circuit breaker frame;

[0039] Figure 2 This is a structural schematic diagram of the circuit breaker of this utility model from the first angle;

[0040] Figure 3 This is a structural schematic diagram of the circuit breaker of this utility model from the second angle;

[0041] Figure 4 This is a structural schematic diagram of the circuit breaker of this utility model from the third angle;

[0042] Figure 5 This is a structural schematic diagram of the circuit breaker of this utility model from the fourth angle;

[0043] Figure 6 for Figure 2 A structural schematic diagram of the first angle of the cast aluminum frame;

[0044] Figure 7 for Figure 2 A structural schematic diagram of the cast aluminum frame from the second angle;

[0045] Figure 8 for Figure 2 A structural schematic diagram of the third angle of the cast aluminum frame;

[0046] Figure 9 for Figure 2 Simulation diagram of a cast aluminum frame under equivalent stress conditions;

[0047] Figure 10 for Figure 2 Simulation diagram of a cast aluminum frame under equivalent elastic deformation conditions.

[0048] Explanation of reference numerals in the attached figures:

[0049] Figure 1 In the middle: 1. Operating mechanism mounting plate; 1-1. Operating shaft through hole; 1-2. Operating mechanism mounting hole; 1-3. Operating mechanism mounting rod; 2. Base; 2-1. Solid seal pole mounting hole; 2-2. Current transformer bracket mounting hole; 2-3. Shielding cover mounting hole; 2-4. Pull rod through hole; 2-5. Positioning groove.

[0050] Figures 2-8 In the middle: 1. Operating mechanism; 1-1. Energy storage spring; 1-2. Operating shaft; 1-3. Connecting plate; 1-4. Bearing; 1-5. Separator; 1-6. Bolt to be avoided; 2. Cast aluminum frame; 21. Operating mechanism mounting bracket; 22. Solid sealing unit mounting frame; 2-1. Spring clearance groove; 2-2. Spring mounting hole; 2-3. Reinforcing shoe; 2-4. Shielding cover mounting hole; 2-5. Positioning groove; 2-6. Composite clearance groove; 2-7. Operating shaft clearance groove; 2-8. Bracket mounting hole; 2-9. First operating mechanism mounting hole; 2 -10. Second operating mechanism mounting hole; 2-11. Countersunk hole; 2-12. Tie rod through hole; 2-13. Sealing unit mounting hole; 2-14. Ventilation hole; 2-15. Extension plate mounting hole; 2-16. Horizontal rib; 2-17. Longitudinal rib; 2-18. Bearing mounting beam; 2-19. Reinforcing beam; 2-20. End plate; 2-21. Reinforcing rib; 2-22. Ring rib; 2-23. Reinforcing chamfer; 3. Extension plate; 4. Sealing unit; 4-1. Tie rod; 5. Current transformer; 6. Bracket; 7. Shielding cover; 8. Clamp. Detailed Implementation

[0051] To address the problems in the background technology, the core inventive concept of this utility model is to integrally cast an aluminum frame using a casting aluminum process, and to provide clearance space for the operating shaft, clearance space for the spring, and connecting parts, thereby ensuring that the energy storage spring can be installed normally. Simultaneously, because the aluminum frame is integrally cast, its flatness and coaxiality are good, making it easier to ensure three-phase consistency, which facilitates the assembly of the circuit breaker and improves its assembly efficiency.

[0052] The present invention will be further described in detail below with reference to the embodiments.

[0053] Specific embodiments of the circuit breaker provided by this utility model:

[0054] like Figures 2-8As shown, the circuit breaker includes a cast aluminum frame 2 (i.e., an integrally formed circuit breaker frame), an operating mechanism 1 mounted on the cast aluminum frame 2, and a sealing unit 4. The cast aluminum frame 2 is integrally cast using a casting process and then machined with holes or slots. The cast aluminum frame 2 includes a sealing unit mounting frame 22 and an operating mechanism mounting bracket 21 connected to one side of the sealing unit mounting frame 22. Preferably, the sealing unit mounting frame 22 and the operating mechanism mounting bracket 21 are of the same height to form a "T" shape, which facilitates casting. Of course, in other specific embodiments, the operating mechanism mounting bracket 21 may be slightly higher or slightly lower than the sealing unit mounting frame 22.

[0055] In this utility model, a shielding cover 7 and a current transformer 5 can also be installed on the cast aluminum frame 2 according to actual needs.

[0056] In this utility model, the operating mechanism 1, the sealing unit 4, the shielding cover 7 and the current transformer 5 are all existing technologies. The mounting frame 22 of the sealing unit is basically the same as the base of the existing circuit breaker frame. The core difference is that the mounting frame 22 of the sealing unit is provided with a reinforcing shoe 2-3, a reinforcing rib 2-21 and a reinforcing chamfer 2-23 to enhance the structural strength of the mounting frame 22 of the sealing unit.

[0057] In this utility model, "the cast aluminum frame 2 is integrally cast by the aluminum casting process and then machined with holes or with holes and grooves" means that when manufacturing the cast aluminum frame 2, a semi-finished product is first integrally cast by the aluminum casting process. Then, only holes are machined on the semi-finished product, or holes and grooves are machined on the semi-finished product at the same time. After the machining is completed, the cast aluminum frame 2 can be obtained.

[0058] For ease of casting, threaded holes must be machined separately, as must horizontal holes (including threaded holes and smooth holes). When the cast aluminum frame 2 includes positioning grooves 2-5, these grooves also need to be machined separately. Other holes and grooves can be cast directly during the casting process or machined separately after casting.

[0059] It should be noted that in this utility model, the circuit breaker frame can also be integrally formed using 3D printing technology, and the threaded holes can be processed separately in the later stage.

[0060] The operating mechanism 1 is an integrated operating mechanism. The operating mechanism 1 includes a connecting plate 1-3, which is installed on the side of the operating mechanism mounting frame 21 away from the fixed unit mounting frame 22 (i.e., the operating mechanism mounting surface). The fixed unit mounting frame 22 includes a fixed unit mounting part, and the fixed unit 4 is installed on the fixed unit mounting part. The fixed unit mounting part includes a fixed unit mounting hole 2-13 and a pull rod through hole 2-12 located on the upper end surface of the fixed unit mounting frame 22. The fixed unit mounting hole 2-13 is used to install the fixed unit 4, and the pull rod through hole 2-12 is used for the pull rod 4-1 of the fixed unit 4 to pass through.

[0061] The operating mechanism 1 also includes an operating shaft 1-2 for operating the fixed sealing unit 4 (the operating shaft 1-2 is connected to the pull rod 4-1 to operate the fixed sealing unit 4 through the pull rod 4-1) and an energy storage spring 1-1 with one end connected to the crank arm on the operating shaft 1-2. The operating mechanism mounting frame 21 includes an operating shaft clearance space for avoiding the operating shaft 1-2 and a spring clearance space for avoiding the energy storage spring 1-1. The operating shaft clearance space and the spring clearance space are connected. The other end of the energy storage spring 1-1, away from itself and connected to the crank arm, is connected to the operating mechanism mounting frame 21 (that is, both ends of the energy storage spring 1-1 are respectively connected to the crank arm on the operating shaft 1-2 and the operating mechanism mounting frame 21, and the operating mechanism mounting frame 21 is provided with a connecting part for connecting to one end of the energy storage spring 1-1).

[0062] The operating shaft clearance space is an operating shaft clearance hole or operating shaft clearance groove 2-7; the operating mechanism mounting bracket 21 has an operating mechanism mounting hole on the side away from the fixed sealing unit mounting frame 22 (i.e., on the operating mechanism mounting surface), which is a threaded hole or a bolt hole communicating with the spring clearance space. Figures 2-8 In the specific embodiment shown, the first operating mechanism mounting hole 2-9 and the second operating mechanism mounting hole 2-10 are both threaded holes. The connecting plate 1-3 is provided with corresponding bolt through holes. After the bolt passes through the corresponding bolt through holes on the connecting plate 1-3, it is threadedly connected to the first operating mechanism mounting hole 2-9 or the second operating mechanism mounting hole 2-10.

[0063] In other embodiments, the operating mechanism mounting hole may also be a bolt hole connected to the spring clearance space.

[0064] The main difference between this utility model and the prior art is that in the prior art, the circuit breaker frame is a carbon steel welded structure, while in this utility model, the circuit breaker frame is integrally formed. Therefore, the flatness and coaxiality of the circuit breaker frame are better, making it easier to ensure three-phase consistency. This facilitates the assembly of the circuit breaker, improves the assembly efficiency of the circuit breaker, and improves the main circuit resistance and partial discharge value of the circuit breaker.

[0065] During actual circuit breaker assembly, the connecting plate 1-3 is installed on the side of the operating mechanism mounting frame 21 away from the solid-sealing unit mounting frame 22, and the solid-sealing unit 4 is installed on the solid-sealing unit mounting part of the solid-sealing unit mounting frame 22. The operating shaft clearance space is used to avoid the operating shaft 1-2, and the spring clearance space is used to avoid the energy storage spring 1-1. The operating shaft clearance space and the spring clearance space are connected to avoid interference between the energy storage spring 1-1 and the operating mechanism mounting frame 21, ensuring that one end of the energy storage spring 1-1 is connected to the crank arm on the operating shaft 1-2, and the other end is connected to the operating mechanism mounting frame 21. These measures ensure the proper installation of the energy storage spring 1-1, and the operating mechanism 1 is an integrated operating mechanism, improving the circuit breaker assembly efficiency.

[0066] When the circuit breaker frame is manufactured using a cast aluminum process, for existing circuit breaker frames, the operating mechanism 1 mounting plate has four operating mechanism mounting rods. These four operating mechanism mounting rods form a rectangle and extend horizontally with a certain length to create an installation space for mounting the energy storage spring 1-1. Since the cast aluminum frame 2 includes four operating mechanism mounting rods, it must be cast in stages, making the casting process relatively complex.

[0067] Regarding the cast aluminum frame 2 in this utility model, the cast aluminum frame 2 does not include the operating mechanism mounting rod. At the same time, in order to avoid interference between the cast aluminum frame 2 and the energy storage spring 1-1 and to ensure the normal installation of the energy storage spring 1-1, the cast aluminum frame 2 includes a brand-new operating mechanism mounting bracket 21, which is easy to cast.

[0068] like Figures 2-8As shown, the mounting frame 22 of the sealing unit includes an inverted "U"-shaped portion, which includes a top plate and two upright plates mounted on both sides of the top plate. Along the arrangement direction of the tie rod through holes 2-12, the mounting frame 22 also includes a bearing mounting beam 2-18, a reinforcing beam 2-19, and an end plate 2-20 connected to both the top plate and the two upright plates. The top plate, the two upright plates, the operating mechanism mounting frame 21, the bearing mounting beam 2-18, the reinforcing beam 2-19, and the end plate 2-20 together form three chambers, each corresponding to a different sealing unit 4. Each chamber is provided with a ring rib 2-22, a transverse rib 2-16, and a longitudinal rib 2-17 connected to the lower surface of the top plate. The ring rib 2-22 surrounds the sealing unit 4. The sealing unit mounting hole 2-13 and the tie rod through hole 2-12 are arranged. The two ends of the longitudinal rib 2-17 are connected to the two vertical plates or to the ring rib 2-22 and one vertical plate. One end of the transverse rib 2-16 is connected to the ring rib 2-22, and the other end is connected to the operating mechanism mounting frame 21, the bearing mounting beam 2-18, the reinforcing beam 2-19 or the end plate 2-20 to strengthen the structural strength of the sealing unit mounting frame 22. The bearing mounting beam 2-18 and the reinforcing beam 2-19 are provided with grooves for the operating shaft 1-2 to pass through. The end plate 2-20 is provided with grooves or through holes for the operating shaft 1-2 to pass through. The bearing mounting beam 2-18 and the end plate 2-20 are also used to install the bearing for supporting the operating shaft 1-2.

[0069] The bearing mounting beam 2-18 is equipped with a clamp 8, which cooperates with the bearing mounting beam 2-18 to support the bearing on the operating shaft 1-2; the end plate 2-20 may be provided with a through hole for supporting the bearing on the operating shaft 1-2, or the end plate 2-20 may be provided with a groove and also equipped with a clamp, which cooperates with the end plate 2-20 to support the bearing on the operating shaft 1-2.

[0070] By arranging various reinforcing ribs, beams, and end plates 2-20, it is possible to ensure that the fixed unit mounting frame 22 has sufficient structural strength while saving materials and reducing costs.

[0071] In other specific embodiments, the horizontal ribs 2-16 and the vertical ribs 2-17 may be omitted, and the top plate and the vertical plate may be thickened to ensure that the mounting frame 22 of the sealing unit has sufficient structural strength.

[0072] In the above specific embodiments, the area of ​​the connection between each rib or beam and the corresponding upright plate, operating mechanism mounting frame 21, bearing mounting beam 2-18, reinforcing beam 2-19 or end plate 2-20 is equal to the cross-sectional area of ​​the corresponding rib or beam. In order to further improve the structural strength of the sealing unit mounting frame 22, the present invention has made the following improvements.

[0073] As a preferred embodiment, the connection between the horizontal rib 2-16 and the corresponding operating mechanism mounting frame 21 or end plate 2-20 is provided with a reinforcing shoe 2-3 to increase the contact area, and the connection between the longitudinal rib 2-17 and the vertical plate is provided with a reinforcing shoe 2-3 to increase the contact area, so as to improve the structural strength of the sealing unit mounting frame 22.

[0074] As a preferred embodiment, the connection between the transverse rib 2-16 and the corresponding bearing mounting beam 2-18 is provided with a reinforcing boot 2-3 to increase the contact area, thereby improving the structural strength of the sealing unit mounting frame 22.

[0075] As a preferred embodiment, the connection between the longitudinal ribs 2-17 and the vertical plate is provided with reinforcing boots 2-3 to increase the contact area, thereby improving the structural strength of the mounting frame 22 of the sealing unit.

[0076] In one preferred embodiment, a reinforcing shoe 2-3 is provided at the connection between the bearing mounting beam 2-18 and at least one vertical plate to increase the contact area. Depending on the specific installation position of the clamp 8, the reinforcing shoe 2-3 on the bearing mounting beam 2-18 can be located at one or both ends of the bearing mounting beam 2-18.

[0077] The above-described specific embodiments can be organically combined to provide reinforcing boots 2-3 at the transverse ribs 2-16, longitudinal ribs 2-17 and / or bearing mounting beams 2-18. Of course, reinforcing boots 2-3 can also be provided at the connection between the transverse ribs 2-16 and the reinforcing beams 2-19.

[0078] The reinforced boots 2-3 of this utility model will be described in detail below.

[0079] In one specific embodiment, the reinforcing boot 2-3 includes a first reinforcing block connected to the lower surface of the corresponding transverse rib 2-16, longitudinal rib 2-17 or bearing mounting beam 2-18, the lower surface of the first reinforcing block being an arc surface or a slope surface.

[0080] As another specific embodiment, in the direction perpendicular to the corresponding transverse rib 2-16, longitudinal rib 2-17 or bearing mounting beam 2-18, the reinforcing shoe 2-3 further includes a second reinforcing block connected to the two sides of the transverse rib 2-16, longitudinal rib 2-17 or bearing mounting beam 2-18, and the side of the second reinforcing block away from the corresponding transverse rib 2-16, longitudinal rib 2-17 or bearing mounting beam 2-18 is an arc surface or a slope surface.

[0081] As the optimal specific implementation, the reinforcing boot 2-3 includes both a first reinforcing block and a second reinforcing block.

[0082] Of course, depending on actual needs, those skilled in the art can also design the shape of the reinforcing boot 2-3 themselves, as long as it can increase the area of ​​the connection between each rib or beam and the corresponding upright plate, operating mechanism mounting frame 21, bearing mounting beam 2-18, reinforcing beam 2-19 or end plate 2-20.

[0083] In one specific embodiment, the connection between the end plate and the upright plate is at a right angle, and the connection between the operating mechanism mounting bracket and the upright plate is also at a right angle.

[0084] To further enhance the structural strength of the mounting frame 22 of the sealing unit, as a preferred embodiment, a reinforcing chamfer 2-23 is provided at the connection between the end plate 2-20 and the upright plate, and a reinforcing chamfer 2-23 is also provided at the connection between the operating mechanism mounting frame 21 and the upright plate.

[0085] As a preferred embodiment, the connection between the operating mechanism mounting bracket 21 and the sealing unit mounting frame 22 is provided with reinforcing ribs 2-21 to further enhance the structural strength of the circuit breaker frame.

[0086] In other specific embodiments, the reinforcing ribs 2-21 may not be provided.

[0087] The above measures can improve the structural strength of the circuit breaker frame, such as... Figures 9-10 As shown, under equivalent stress conditions, the deformation of the cast aluminum frame 2 (i.e., the integrated circuit breaker frame) is relatively small. Specifically, the deformation of the existing circuit breaker frame is 0.91 mm, while the deformation of the cast aluminum frame 2 is only 0.15 mm. Under equivalent elastic deformation conditions, the cast aluminum frame 2 does not show obvious stress concentration.

[0088] The following focuses on the description of the operating mechanism mounting bracket 21.

[0089] As a preferred embodiment, such as Figures 2-8 As shown, the spring clearance space is a spring clearance groove 2-1 set on the upper end surface of the operating mechanism mounting bracket 21. The spring clearance groove 2-1 extends vertically to facilitate casting.

[0090] In other specific implementations, such as Figures 2-8 As shown, the spring clearance space is a spring clearance hole, which extends through the operating mechanism mounting part in the vertical direction.

[0091] Compared to the technical solution where the spring clearance space is a spring clearance hole, in the technical solution where the spring clearance space is a spring clearance groove 2-1, there is still aluminum material below the spring clearance groove 2-1, which is beneficial to improving the structural strength of the operating mechanism mounting bracket 21.

[0092] To simplify the structure, as a preferred embodiment, the spring clearance groove 2-1 (spring clearance hole) has a spring mounting hole 2-2 on its groove sidewall (hole wall). The spring mounting hole 2-2 is a bolt through hole. The energy storage spring 1-1 includes a spring body and a nut that is fixedly connected to one end of the spring body by welding. The bolt passes through the spring mounting hole 2-2 and is threadedly connected to the nut to achieve an indirect connection between the energy storage spring 1-1 and the operating mechanism mounting bracket 21, resulting in a simple structure. The spring mounting hole 2-2 constitutes a connection part for indirect connection to one end of the energy storage spring 1-1 via a bolt.

[0093] In other specific embodiments, the sidewall (hole wall) of the spring clearance groove 2-1 (spring clearance hole) is provided with a fixed shaft parallel to the operating shaft 1-2, and the two ends of the energy storage spring 1-1 are respectively hung on the crank arm and the fixed shaft. The fixed shaft constitutes a connecting part for direct connection with the energy storage spring 1-1.

[0094] For ease of processing, such as Figures 2-8 As shown, in a preferred embodiment, the operating shaft clearance space is an operating shaft clearance groove 2-7 provided on the lower end face of the operating mechanism mounting bracket 21. In the extending direction of the operating shaft 1-2, the operating shaft clearance groove 2-7 passes through the operating mechanism mounting bracket 21. At this time, the operating shaft clearance groove 2-7 can be directly cast during casting.

[0095] In other specific embodiments, the operating shaft clearance space is a horizontally extending operating shaft clearance hole. In this case, the operating shaft clearance hole needs to be machined separately after casting.

[0096] To make the circuit breaker structure more compact, such as Figures 2-8 As shown, in a preferred embodiment, the connecting plate 1-3 has a support hole through which the operating shaft 1-2 passes, and a bearing 1-4 is fitted onto the operating shaft 1-2. The bearing 1-4 matches the support hole so that the support hole indirectly supports the operating shaft 1-2 through the bearing 1-4. The connecting plate 1-3 also has a through hole. The operating mechanism 1 further includes a separator 1-5 for creating an installation space between the two plates. The separator 1-5 has a threaded hole, through which the bolt to be avoided 1-6 passes and is threadedly connected to the threaded hole on the separator 1-5. The side of the operating mechanism mounting bracket 21 near the connecting plate 1-3 has a clearance groove for avoiding the bearing 1-4 and the bolt to be avoided 1-6. Specifically, the clearance groove can be multiple clearance grooves that individually avoid each bearing 1-4 and each bolt to be avoided 1-6, or the clearance groove can be a composite clearance groove 2-6 that simultaneously avoids the bearing 1-4 and all bolts to be avoided 1-6.

[0097] The structure and connection relationship of the support hole, bearing 1-4, separator 1-5, and bolt to be avoided 1-6 are all existing technologies and will not be described in detail here.

[0098] In other specific embodiments, the operating mechanism mounting frame 21 has a "C" shaped structure. The operating mechanism mounting frame 21 includes two parallel horizontal plates and a vertical plate. The two ends of the vertical plate are connected to the two horizontal plates respectively, and the middle part of the vertical plate is connected to the sealing unit mounting frame 22. The space formed by the vertical plate and the two horizontal plates simultaneously constitutes the spring clearance space and the clearance space for clearance of bearings 1-4 and bolts 1-6 to be clearance.

[0099] To save raw materials, such as Figures 2-8 As shown, in a preferred embodiment, the circuit breaker also includes a housing and an extension plate 3. In the length direction of the extension plate 3, one end of the extension plate 3 is mounted on the housing, and the other end is mounted on the side of the operating mechanism mounting frame 21 near the solid sealing unit mounting frame 22, thereby shortening the length of the operating mechanism mounting frame 21 and saving raw materials.

[0100] Specifically, the operating mechanism mounting bracket 21 has an extension plate mounting hole 2-15 on the side near the solid sealing unit mounting frame 22 for mounting the extension plate 3. The extension plate 3 has a bolt through hole. After the bolt passes through the corresponding bolt through hole and the extension plate mounting hole 2-15, it is connected to the nut located in the spring clearance space. Alternatively, the extension plate mounting hole 2-15 is a threaded hole. After the bolt passes through the corresponding bolt through hole, it is threadedly connected to the extension plate mounting hole 2-15.

[0101] Along the length of the extension plate 3, the end of the extension plate 3 away from the operating mechanism mounting bracket 21 is also provided with bolt holes. The housing is provided with corresponding bolt holes or threaded holes. After the bolt holes on the extension plate 3 and the housing are threadedly connected to the nuts, or the bolts pass through the bolt holes on the extension plate 3 and are connected to the threaded holes on the housing.

[0102] It should be noted that, in Figures 2-8 In the specific embodiment shown, the housing is located on the side of the operating mechanism mounting bracket 21 near the sealing unit mounting frame 22. In the length direction of the extension plate 3, one end of the operating mechanism mounting bracket 21 is connected to the housing through the extension plate 3, and the other end is provided with a countersunk hole 2-11. The housing is provided with corresponding threaded holes or bolt through holes. The bolt passes through the countersunk hole 2-11 and is connected to the corresponding threaded hole. Alternatively, the bolt passes through the countersunk hole 2-11 and the corresponding bolt through hole and is connected to the nut.

[0103] In other specific embodiments, the circuit breaker does not include the extension plate 3, the length of the operating mechanism mounting bracket 21 is extended, and the operating mechanism mounting bracket 21 has a box mounting hole on the side near the box body. The box mounting hole is a threaded hole, and the bolt passes through the bolt through hole on the box body and is threadedly connected to the box mounting hole. Alternatively, the box mounting hole is a bolt through hole that communicates with the spring clearance space. The bolt passes through the box mounting hole and the bolt through hole on the box body and is connected to the nut. The nut is located inside the box body or in the spring clearance space.

[0104] The following is in conjunction with the appendix Figures 2-8 Describe other structures not mentioned above.

[0105] like Figures 2-8 As shown, the mounting frame 22 of the solidification unit is also provided with a shield mounting hole 2-4. The shield 7 is installed on the mounting frame 22 of the solidification unit through the shield mounting hole 2-4. The shield mounting hole 2-4 is a bolt through hole. The shield 7 is provided with a threaded hole. After the bolt passes through the shield mounting hole 2-4, it is threadedly connected to the threaded hole on the shield 7.

[0106] like Figures 2-8 As shown, the mounting frame 22 of the solid sealing unit is also provided with bracket mounting holes 2-8. The bracket mounting holes 2-8 are threaded holes. After the bolts on the bolt through the bracket 6 are threaded through the holes, they are connected to the bolt mounting holes 2-8. The current transformer 5 is mounted on the bracket 6 so that the current transformer 5 is indirectly mounted on the base.

[0107] It should be noted that, in Figures 2-8 In the specific embodiment shown, the operating mechanism mounting bracket 21 is also provided with four ventilation holes 2-14. These ventilation holes 2-14 are not used to install any parts, so the cast aluminum frame 2 may not include these ventilation holes 2-14.

[0108] Specific embodiments of the cast aluminum frame provided by this utility model:

[0109] Reference Figures 2-10 As shown, the cast aluminum frame 2 in this embodiment is the same as any cast aluminum frame 2 in any specific embodiment of the circuit breaker of this utility model, and will not be described again here.

[0110] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some technical features, or organically combine different specific implementation methods to create the specific implementation methods shown in the accompanying drawings. Of course, those skilled in the art can also create other specific implementation methods not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cast aluminum frame characterized by, The device includes an integrally molded operating mechanism mounting bracket and a fixed sealing unit mounting frame. The operating mechanism mounting bracket is located on one side of the fixed sealing unit mounting frame. The upper surface of the fixed sealing unit mounting frame is provided with a fixed sealing unit mounting hole for mounting the fixed sealing unit and a pull rod through hole for the pull rod of the fixed sealing unit to pass through. The side of the operating mechanism mounting bracket away from the fixed sealing unit mounting frame forms an operating mechanism mounting surface for mounting the operating mechanism. The operating mechanism mounting bracket also includes an operating shaft clearance hole or operating shaft clearance groove for avoiding the operating shaft of the operating mechanism, a spring clearance space for avoiding the energy storage spring of the operating mechanism, and a connecting part for direct or indirect connection with one end of the energy storage spring. The operating shaft clearance space and the spring clearance space are connected.

2. The cast aluminum frame of claim 1, wherein, The mounting frame for the fixed sealing unit includes an inverted "U"-shaped section, which comprises a top plate and two upright plates mounted on either side of the top plate. Along the direction of the tie rod perforations, the mounting frame also includes a bearing mounting beam, a reinforcing beam, and an end plate connected to the top plate and the two upright plates. The top plate, the two upright plates, the operating mechanism mounting frame, the bearing mounting beam, the reinforcing beam, and the end plates together form three chambers, each corresponding to a different fixed sealing unit. Each chamber is equipped with ring ribs, transverse ribs, and longitudinal ribs connected to the lower surface of the top plate. Ribs and ring ribs are arranged around the mounting holes of the sealing unit and the through holes of the tie rod. The two ends of the longitudinal ribs are connected to the two vertical plates or to the ring ribs and one vertical plate. One end of the transverse ribs is connected to the ring ribs, and the other end is connected to the operating mechanism mounting frame, bearing mounting beam, reinforcing beam or end plate to enhance the structural strength of the sealing unit mounting frame. The bearing mounting beam and reinforcing beam are provided with grooves for the operating shaft to pass through. The end plate is provided with grooves or through holes for the operating shaft to pass through. The bearing mounting beam and end plate are also used to install bearings for supporting the operating shaft.

3. The cast aluminum frame of claim 2, wherein, The connection between the horizontal rib and the corresponding operating mechanism mounting bracket or end plate is provided with a reinforcing shoe to increase the contact area, and the connection between the longitudinal rib and the vertical plate is provided with a reinforcing shoe to increase the contact area.

4. The cast aluminum frame of claim 2, wherein, The connection between the horizontal rib and the corresponding bearing mounting beam is equipped with a reinforcing shoe to increase the contact area.

5. The cast aluminum frame of claim 2, wherein, The connection between the bearing mounting beam and at least one vertical plate is provided with a reinforcing shoe to increase the contact area.

6. The cast aluminum frame as described in any one of claims 3 to 5, characterized in that, The reinforcing boot includes a first reinforcing block connected to the lower surface of the corresponding transverse rib, longitudinal rib, or bearing mounting beam, the lower surface of the first reinforcing block being an arc surface or a slope surface.

7. The cast aluminum frame of claim 6, wherein, In the direction perpendicular to the corresponding transverse rib, longitudinal rib, or bearing mounting beam, the reinforcing shoe also includes a second reinforcing block connected to both sides of the transverse rib, longitudinal rib, or bearing mounting beam, wherein the side of the second reinforcing block away from the corresponding transverse rib, longitudinal rib, or bearing mounting beam is an arc surface or a slope surface.

8. The cast aluminum frame of any of claims 2-5, wherein, The connection between the end plate and the upright plate is provided with a reinforced chamfer, and the connection between the operating mechanism mounting bracket and the upright plate is also provided with a reinforced chamfer.

9. The cast aluminum frame of any of claims 1-5, wherein, The spring clearance space is a spring clearance groove or spring clearance hole provided on the upper end face of the operating mechanism mounting bracket.

10. A circuit breaker comprising a circuit breaker frame, an operating mechanism mounted on the circuit breaker frame, and a stationary seal unit, characterized in that, The circuit breaker frame includes an integrally formed operating mechanism mounting frame and a fixed-seal unit mounting frame. The operating mechanism mounting frame is located on one side of the fixed-seal unit mounting frame, and the fixed-seal unit is mounted on the fixed-seal unit mounting frame. The operating mechanism is an integral operating mechanism, and the integral operating mechanism is mounted on the side of the operating mechanism mounting frame away from the fixed-seal unit mounting frame. The operating mechanism mounting frame also includes an operating shaft clearance hole or operating shaft clearance groove for clearance of the operating shaft of the operating mechanism, a spring clearance space for clearance of the energy storage spring of the operating mechanism, and a connecting part that is directly or indirectly connected to one end of the energy storage spring. The operating shaft clearance space and the spring clearance space are connected.

11. The circuit breaker of claim 10, wherein, The circuit breaker frame is a cast aluminum frame, and the upper end surface of the solid seal unit mounting frame is provided with a solid seal unit mounting hole for mounting the solid seal unit and a tie rod through hole for the tie rod of the solid seal unit to pass through.

12. The circuit breaker of claim 11, wherein, The mounting frame for the fixed sealing unit includes an inverted "U"-shaped section, which comprises a top plate and two upright plates mounted on either side of the top plate. Along the direction of the tie rod perforations, the mounting frame also includes a bearing mounting beam, a reinforcing beam, and an end plate connected to the top plate and the two upright plates. The top plate, the two upright plates, the operating mechanism mounting frame, the bearing mounting beam, the reinforcing beam, and the end plates together form three chambers, each corresponding to a different fixed sealing unit. Each chamber is equipped with ring ribs, transverse ribs, and longitudinal ribs connected to the lower surface of the top plate. Ribs and ring ribs are arranged around the mounting holes of the sealing unit and the through holes of the tie rod. The two ends of the longitudinal ribs are connected to the two vertical plates or to the ring ribs and one vertical plate. One end of the transverse ribs is connected to the ring ribs, and the other end is connected to the operating mechanism mounting frame, bearing mounting beam, reinforcing beam or end plate to enhance the structural strength of the sealing unit mounting frame. The bearing mounting beam and reinforcing beam are provided with grooves for the operating shaft to pass through. The end plate is provided with grooves or through holes for the operating shaft to pass through. The bearing mounting beam and end plate are also used to install bearings for supporting the operating shaft.

13. The circuit breaker of claim 12, wherein, The connection between the horizontal rib and the corresponding operating mechanism mounting bracket or end plate is provided with a reinforcing shoe to increase the contact area, and the connection between the longitudinal rib and the vertical plate is provided with a reinforcing shoe to increase the contact area.

14. The circuit breaker of claim 12, wherein, The connection between the horizontal rib and the corresponding bearing mounting beam is equipped with a reinforcing shoe to increase the contact area.

15. The circuit breaker of claim 12, wherein, The connection between the bearing mounting beam and at least one vertical plate is provided with a reinforcing shoe to increase the contact area.

16. The circuit breaker of any one of claims 13-15, wherein, The reinforcing boot includes a first reinforcing block connected to the lower surface of the corresponding transverse rib, longitudinal rib, or bearing mounting beam, the lower surface of the first reinforcing block being an arc surface or a slope surface.

17. The circuit breaker of claim 16, wherein In the direction perpendicular to the corresponding transverse rib, longitudinal rib, or bearing mounting beam, the reinforcing shoe also includes a second reinforcing block connected to both sides of the transverse rib, longitudinal rib, or bearing mounting beam, wherein the side of the second reinforcing block away from the corresponding transverse rib, longitudinal rib, or bearing mounting beam is an arc surface or a slope surface.

18. The circuit breaker of any one of claims 12-15, wherein, The connection between the end plate and the upright plate is provided with a reinforced chamfer, and the connection between the operating mechanism mounting bracket and the upright plate is also provided with a reinforced chamfer.

19. The circuit breaker of any one of claims 12-15, wherein, The spring clearance space is a spring clearance groove or spring clearance hole provided on the upper end face of the operating mechanism mounting bracket.

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