Moment fastening device for upper and lower shafts of movable iron core of permanent magnetic mechanism of circuit breaker
By designing a torque fastening device for the upper and lower shafts of the moving iron core in the permanent magnet mechanism of the circuit breaker, and utilizing the cooperation of the mounting block and the limit shaft, the problem of the moving iron core assembly being difficult to clamp during the assembly process was solved, achieving reliable torque fastening and easy operation, thus improving work efficiency.
Patent Information
- Application Number
- CN202520413325.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-11
AI Technical Summary
The moving iron core assembly is not easy to clamp during the assembly process and cannot be reliably tightened with torque, resulting in inconvenience in operation.
A torque fastening device for the upper and lower shafts of the moving iron core in a circuit breaker permanent magnet mechanism was designed. The device includes a mounting block and a limiting shaft. Through the cooperation of a stepped hole and an elliptical flat hole, combined with an adjusting bolt and a locking nut, the axial and angular limiting of the lower shaft of the moving iron core is achieved, ensuring a reliable connection between the upper and lower shafts.
It achieves reliable clamping and torque tightening of the moving iron core assembly, is simple to operate, saves time and effort, and improves work efficiency.
Smart Images
Figure CN223884387U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of production and assembly of mechanical or electrical products, and particularly relates to a device for fastening the up-down axial torque of a moving iron core of a circuit breaker permanent magnetic mechanism. BACKGROUND
[0002] The moving iron core assembly of the circuit breaker permanent magnetic mechanism is the power core of the entire circuit breaker, and provides the source power for the closing and opening of the circuit breaker. Whether the up-down axial fastening torque of the moving iron core meets the design requirements affects the service life of the entire circuit breaker. In the actual production process, the up shaft and the down shaft of the moving iron core assembly are two parts which are connected through threads, and the thread connection has torque requirements. The shaft rod of the up shaft and the down shaft is thin, and cannot be reliably clamped and fixed, so the torque process is very inconvenient. CONTENT OF THE UTILITY MODEL
[0003] (I) Technical problem to be solved
[0004] The utility model provides a device for fastening the up-down axial torque of a moving iron core of a circuit breaker permanent magnetic mechanism, to solve the problem that the moving iron core assembly is not easy to clamp and torque cannot be applied during assembly.
[0005] (II) Technical scheme
[0006] In order to solve the above problems, the utility model provides a device for fastening the up-down axial torque of a moving iron core of a circuit breaker permanent magnetic mechanism, which comprises a mounting block and a limiting shaft. The mounting block is provided with a stepped hole from top to bottom. The upper part of the stepped hole has a large diameter, and the lower part has a small diameter. The diameter of the upper part of the stepped hole matches the diameter of the down shaft of the moving iron core. An oval flat hole is formed in the side surface of the mounting block. The shape and size of the oval flat hole are the same as those of the flat hole of the down shaft of the moving iron core. The limiting shaft is an oval flat shaft, and its size is slightly smaller than that of the oval flat hole. In operation, the up shaft and the down shaft of the moving iron core are installed on the moving iron core. The up shaft and the down shaft are screwed by hand. The down shaft of the moving iron core is inserted into the upper part of the stepped hole until the lower end surface of the moving iron core is in close contact with the upper end surface of the mounting block. The down shaft of the moving iron core is adjusted slightly so that the flat hole of the down shaft of the moving iron core coincides with the oval flat hole in the side surface of the mounting block. At this time, the limiting shaft is inserted into the oval flat hole of the mounting block and the flat hole of the down shaft of the moving iron core to limit the axial and angular directions of the down shaft of the moving iron core.
[0007] Preferably, it also includes an adjusting bolt and a locking nut, the lower part of the stepped hole is provided with a threaded hole, the adjusting bolt extends into the lower part of the stepped hole and cooperates with the threaded hole in the lower part of the stepped hole, the locking nut is sleeved on the adjusting bolt to lock the adjusting bolt, when the flat hole of the lower shaft of the moving iron core is deviated from the upper and lower positions of the oval flat hole of the side surface of the mounting block, the adjusting bolt is rotated until the oval flat hole of the side surface of the mounting block is at the same height as the flat hole of the lower shaft of the moving iron core, at this time, the locking nut is tightened to lock the adjusting bolt, so that the limiting shaft can be inserted into the oval flat hole of the mounting block and the flat hole of the lower shaft of the moving iron core.
[0008] Preferably, the upper part of the stepped hole of the mounting block and the hole opening of the oval flat hole are chamfered.
[0009] (III) Technical effects
[0010] When the circuit breaker permanent magnet mechanism moving iron core upper and lower shaft torque fastening device works, the upper shaft and the lower shaft are installed on the moving iron core, the upper and lower shaft threads are manually tightened, the lower shaft of the moving iron core assembly is inserted into the upper part of the stepped hole of the mounting block, the lower end surface of the moving iron core is attached to the upper end surface of the mounting block, the position of the lower shaft is adjusted, the flat hole of the lower shaft is overlapped with the oval flat hole of the mounting block, the limiting shaft is inserted into the oval flat hole of the mounting block to limit the lower shaft in the axial and angular directions, and the fastening device is clamped and fixed on the vice during use. The circuit breaker permanent magnet mechanism moving iron core upper and lower shaft torque fastening device provided by the present application solves the problems of difficult clamping and inability to tighten torque during assembly of the moving iron core assembly, and has the characteristics of simple operation, time and labor saving, and high work efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0011] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, other drawings can also be obtained by those skilled in the art without creative labor.
[0012] Figure 1 The structure schematic diagram of the moving iron core assembly provided by the embodiment of the present application.
[0013] Figure 2 The structure schematic diagram of the upper shaft of the moving iron core assembly provided by the embodiment of the present application.
[0014] Figure 3 The structure schematic diagram of the lower shaft of the moving iron core assembly provided by the embodiment of the present application.
[0015] Figure 4 The connection schematic diagram of the circuit breaker permanent magnet mechanism moving iron core upper and lower shaft torque fastening device provided by the embodiment of the present application and the lower shaft of the moving iron core when working.
[0016] Explanation of reference signs:
[0017] 1 - moving iron core, 2 - moving iron core upper shaft, 3 - moving iron core lower shaft, 4 - mounting block, 5 - stepped hole, 6 - oval flat hole, 7 - flat hole, 8 - limiting shaft, 9 - adjusting bolt, 10 - locking nut. Embodiment
[0018] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the application examples will be clearly and completely described below in combination with the drawings in the application examples. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should fall within the scope of protection of the present application.
[0019] Embodiment:
[0020] Reference is made to the accompanying drawings Figures 1 to 4 , the accompanying drawings Figure 1 provide a moving iron core assembly structure schematic diagram of the embodiments of the present application, Figure 2 provide a moving iron core assembly upper shaft structure schematic diagram of the embodiments of the present application, Figure 3 provide a moving iron core assembly lower shaft structure schematic diagram of the embodiments of the present application, Figure 4 provide a circuit breaker permanent magnet mechanism moving iron core upper and lower shaft torque fastening device working time and moving iron core lower shaft connection schematic diagram, as shown in Figures 1 to 3 , in the moving iron core 1 assembly, the moving iron core upper shaft 2 and the moving iron core lower shaft 3 shaft rod are thin, after being connected by threads, they cannot be reliably clamped and fixed, and the torque process is very inconvenient, as shown in Figure 3 , the moving iron core lower shaft 3 side is provided with a flat hole 7, the flat hole 7 is a through hole, as shown in Figure 4As shown, the upper and lower axial torque fastening device of the moving iron core of the circuit breaker permanent magnet mechanism comprises a mounting block 4, the mounting block 4 is provided with a stepped hole 5 from top to bottom, the stepped hole 5 is a through hole, the upper part has a large diameter and the lower part has a small diameter, the diameter of the upper part of the stepped hole 5 matches the diameter of the lower shaft 3 of the moving iron core, the side surface of the mounting block 4 is provided with an oval flat hole 6, the oval flat hole 6 has the same shape and size as the flat hole 7, the limiting shaft 8 is an oval flat shaft, the size is slightly smaller than the size of the oval flat hole 6, which facilitates the insertion of the limiting shaft 8 into the oval flat hole 6 and the flat hole 7, during operation, the upper and lower axial torque fastening device of the moving iron core of the circuit breaker permanent magnet mechanism is fixed on the vice, the upper shaft 2 of the moving iron core and the lower shaft 3 of the moving iron core are installed on the moving iron core 1, the upper shaft 2 of the moving iron core and the lower shaft 3 of the moving iron core are manually screwed, the lower shaft 3 of the moving iron core is inserted into the upper part of the stepped hole 5 until the lower end surface of the moving iron core 1 is in close contact with the upper end surface of the mounting block 4, the lower shaft 3 of the moving iron core is slightly adjusted so that the flat hole 7 of the lower shaft 3 of the moving iron core has the same height as the oval flat hole 7 on the side surface of the mounting block 4, at this time, the limiting shaft 8 is inserted into the oval flat hole 6 of the mounting block 4 and the flat hole 7 of the lower shaft 3 of the moving iron core to limit the axial and angular positions of the lower shaft 3 of the moving iron core, the torque wrench is clamped on the upper shaft 2 of the moving iron core, the torque wrench is pulled with force until the torque wrench emits a dripping sound, and the upper and lower shafts of the moving iron core 1 assembly are fastened in torque.
[0021] The inner surface of the lower part of the stepped hole 5 is provided with a threaded hole which matches the threaded size of the adjusting bolt 9, the locking nut 10 is sleeved on the adjusting bolt 9 to lock the adjusting bolt 9, when the flat hole 7 of the lower shaft 3 of the moving iron core and the oval flat hole 6 on the side surface of the mounting block 4 have a deviation in the up-down direction, the adjusting bolt 9 is rotated to lift or lower the lower shaft 3 of the moving iron core until the oval flat hole 6 on the side surface of the mounting block 4 has the same height as the flat hole 7 of the lower shaft 3 of the moving iron core, at this time, the locking nut 10 is tightened to lock the adjusting bolt 9 so that the limiting shaft 8 can be inserted into the oval flat hole 6 of the mounting block 4 and the flat hole 7 of the lower shaft 3 of the moving iron core.
[0022] The upper part of the stepped hole 5 and the oval flat hole 6 of the mounting block 4 are chamfered to facilitate the insertion of the lower shaft 3 of the moving iron core and the limiting shaft 8.
[0023] It should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the application is used, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.
[0024] It should also be noted that unless otherwise explicitly specified and limited, the terms "provided with", "provided with" and the like should be broadly understood, and those skilled in the art can understand the specific meaning of the above terms in the application according to the specific circumstances.
Claims
1. A circuit breaker permanent magnet mechanism moving iron core up and down torque fastening device, characterized in that, The installation block is provided with a stepped hole, the upper part of which has a large diameter and the lower part of which has a small diameter, the upper part of the stepped hole matches the diameter of the lower shaft of the moving iron core, the side of the installation block is provided with an oval flat hole, the shape and size of the oval flat hole are the same as the flat hole of the lower shaft of the moving iron core, the limiting shaft is an oval flat shaft, the size of which is slightly smaller than the size of the oval flat hole, in operation, the upper shaft and the lower shaft of the moving iron core are installed on the moving iron core, the upper shaft and the lower shaft are manually screwed, the lower shaft of the moving iron core is inserted into the upper part of the stepped hole until the lower end surface of the moving iron core is attached to the upper end surface of the installation block, the lower shaft of the moving iron core is finely adjusted so that the flat hole of the lower shaft of the moving iron core coincides with the oval flat hole on the side of the installation block, at this time, the limiting shaft is inserted into the oval flat hole of the installation block and the flat hole of the lower shaft of the moving iron core to limit the axial and angular directions of the lower shaft of the moving iron core.
2. The upper and lower axial torque fastening device for the moving iron core of a permanent magnetic mechanism of a circuit breaker according to claim 1, characterized in that, The installation block is provided with a stepped hole, the upper part of which has a large diameter and the lower part of which has a small diameter, the upper part of the stepped hole matches the diameter of the lower shaft of the moving iron core, the side of the installation block is provided with an oval flat hole, the shape and size of the oval flat hole are the same as the flat hole of the lower shaft of the moving iron core, the limiting shaft is an oval flat shaft, the size of which is slightly smaller than the size of the oval flat hole, in operation, the upper shaft and the lower shaft of the moving iron core are installed on the moving iron core, the upper shaft and the lower shaft are manually screwed, the lower shaft of the moving iron core is inserted into the upper part of the stepped hole until the lower end surface of the moving iron core is attached to the upper end surface of the installation block, the lower shaft of the moving iron core is finely adjusted so that the flat hole of the lower shaft of the moving iron core coincides with the oval flat hole on the side of the installation block, at this time, the limiting shaft is inserted into the oval flat hole of the installation block and the flat hole of the lower shaft of the moving iron core to limit the axial and angular directions of the lower shaft of the moving iron core.
3. The upper and lower axial torque fastening device for the moving iron core of a permanent magnetic mechanism of a circuit breaker according to any one of claims 1 or 2, characterized in that, The lower part of the stepped hole is provided with a threaded hole, the adjusting bolt is inserted into the threaded hole of the lower part of the stepped hole, the locking nut is sleeved on the adjusting bolt to lock the adjusting bolt, when the flat hole of the lower shaft of the moving iron core is deviated from the oval flat hole on the side of the installation block in the vertical direction, the adjusting bolt is rotated until the oval flat hole on the side of the installation block is the same height as the flat hole of the lower shaft of the moving iron core, at this time, the locking nut is tightened to lock the adjusting bolt, so that the limiting shaft can be inserted into the oval flat hole of the installation block and the flat hole of the lower shaft of the moving iron core. The upper part of the stepped hole of the installation block and the oval flat hole are chamfered.