Anti-loosening transformer iron core

Abstract

According to the anti-loosening transformer iron core provided by the embodiment of the invention, the fastening bolts are inserted into the bolt holes of the plurality of silicon steel sheets, and the fastening bolts fix the plurality of silicon steel sheets through the nuts to form the iron core. The fastening bolt is concaved inwards in the axis direction and provided with a hole, a plurality of arc-shaped holes are formed in the silicon steel sheet located on the outermost side and distributed on the periphery of the bolt hole at equal intervals in the circumferential direction, the cylinder of the brake part is inserted into the hole, and the fixing claw of the brake part abuts against the wall face of the hexagon nut. And the end parts of the fixing claws are inserted into the arc-shaped holes. By the adoption of the structural design, the fixing claws of the brake part can be fixed to the silicon steel sheet and abut against the wall face of the hexagon nut through the fixing claws, so that the situation that the fastening nut turns and loosens is prevented, and then negative effects in the operation process of a transformer are effectively avoided.

Description

Technical Field

[0001] The present application relates to the technical field of transformer cores, and more specifically, to an anti-loosening transformer core. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are primary coil, secondary coil and iron core. Its main functions include voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc. According to their use, they can be divided into power transformers and special transformers (electric furnace transformers, rectifier transformers, industrial frequency test transformers, voltage regulators, mining transformers, audio transformers, medium frequency transformers, high frequency transformers, impact transformers, instrument transformers, electronic transformers, reactors, mutual inductors, etc.).

[0003] In the related art, the transformer core is the main magnetic circuit part of the transformer. The transformer core is usually made of several stacked silicon steel sheets and fixed by clamps. During the actual operation of the transformer, the magnetostriction and magnetic leakage of the silicon steel sheets of the transformer core will cause vibration, which in turn causes the nut to vibrate. Over time, the nuts used to fix the silicon steel sheets of the transformer core will loosen, which will have a negative impact on the normal operation of the transformer.

[0004] In summary, the present application solves the above technical problems by designing a transformer core that prevents loosening. Utility Model Content

[0005] In view of this, an embodiment of the present application provides a transformer core that is prevented from loosening, so as to solve the problem in the related art that the silicon steel sheets of the transformer core may cause the nut to vibrate due to vibration, thereby causing the transformer to fail to operate normally.

[0006] In order to achieve the above objectives, the present application provides the following technical solutions:

[0007] A transformer core that prevents loosening, comprising:

[0008] A plurality of silicon steel sheets, wherein the plurality of silicon steel sheets are stacked to form an iron core, a bolt hole is provided at a corner position of the surface of each silicon steel sheet, and a plurality of arc holes are further provided on the surface of the outermost silicon steel sheet, and the plurality of arc holes are equidistantly distributed around the bolt hole along the circumferential direction;

[0009] A plurality of fastening bolts, wherein the plurality of fastening bolts pass through the bolt holes, the nut heads of the fastening bolts fit the outer surface of the silicon steel sheet, the other ends of the fastening bolts are threadedly connected with hexagonal nuts, and the ends of the fastening bolts near the hexagonal nuts are provided with inwardly recessed holes;

[0010] The brake part includes a cylinder and a fixing claw arranged at the end of the cylinder, the cylinder is inserted into the hole of the fastening bolt, the wall surface of the fixing claw abuts against each wall surface of the hexagonal nut, and the end of the fixing claw is inserted into the arc hole.

[0011] In some possible implementations, the other end of the fastening bolt passes through the hexagonal nut and extends outside the hexagonal nut;

[0012] A ring sleeve is provided at the position where the cylinder contacts the fastening bolt, and the cylinder is connected to the end of the fastening bolt through the ring sleeve.

[0013] In some possible implementations, a magnetic sheet is provided on the wall surface of the ring sleeve, and the ring sleeve is adsorbed on the wall surface of the hexagonal nut through the magnetic sheet.

[0014] In some possible implementations, the arc length of each of the arc-shaped holes is greater than the end width of the fixing claw.

[0015] In some possible implementations, the cylinder and the fixing claw are integrally formed.

[0016] In some possible implementations, the fixing claw is located at a middle position of the wall surface of the hexagonal nut.

[0017] The anti-loosening transformer core provided by the embodiment of the present application has at least the following beneficial effects:

[0018] In the anti-loosening transformer core provided in the embodiment of the present application, a fastening bolt is inserted into the bolt holes of multiple silicon steel sheets, and the fastening bolt fixes the multiple silicon steel sheets through nuts to form an iron core. The fastening bolt is recessed inward along the axial direction and is provided with a hole. A plurality of arc holes are provided on the outermost silicon steel sheet. The plurality of arc holes are equidistantly distributed around the bolt hole in the circumferential direction. The cylinder of the brake member is inserted into the hole, and the fixing claw of the brake member abuts against the wall of the hexagonal nut, and the end of the fixing claw is inserted into the arc hole. The above-mentioned structural design can fix the fixing claw of the brake member on the silicon steel sheet, and the fixing claw abuts against the wall of the hexagonal nut, thereby preventing the fastening nut from loosening in a circle, thereby effectively avoiding negative effects on the transformer during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic structural diagram of a transformer core that is prevented from loosening provided in an embodiment of the present application;

[0021] Figure 2 A schematic structural diagram of another side surface of the anti-loosening transformer core provided in an embodiment of the present application;

[0022] Figure 3 An exploded view of a transformer core that is prevented from loosening provided in an embodiment of the present application;

[0023] Figure 4 A schematic structural diagram of a brake component for preventing a transformer core from loosening provided in an embodiment of the present application.

[0024] In the figure:

[0025] 100, silicon steel sheet; 200, bolt hole; 300, arc hole; 400, fastening bolt; 500, hexagonal nut; 700, hole; 800, brake part; 810, cylinder; 820, fixing claw; 830, ring sleeve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1-Figure 4 As shown, the transformer core for preventing loosening provided by the embodiment of the present application comprises silicon steel sheets 100, fastening bolts 400 and brakes 800, wherein a plurality of silicon steel sheets 100 are stacked in a certain order to form a core, and bolt holes 200 are arranged at four corners of the surface of each silicon steel sheet 100, and the fastening bolts 400 are inserted into the bolt holes 200. The nut head of the fastening bolt 400 abuts against the surface of the silicon steel sheet 100, and the other end of the fastening bolt 400 is threadedly connected with a hexagonal nut 500, and the structure of the fastening bolt 400 and the hexagonal nut 500 can be used to fix a plurality of silicon steel sheets 100 to form a core.

[0028] A hole 700 is formed at the end of the fastening bolt 400 near the hexagonal nut 500 along the axial direction. In addition, a plurality of arc holes 300 are provided on the surface of the silicon steel sheet 100 located at the outermost side of the core. The plurality of arc holes 300 are equidistantly distributed around the bolt hole 200 in the circumferential direction.

[0029] In the present embodiment, the brake member 800 is a component used to prevent the hexagonal nut 500 from loosening by turning in circles. The brake member 800 is composed of a cylinder 810 and a fixing claw 820, which can be an integrally formed structure or a welded connection. Specifically, one end of the cylinder 810 along the length direction is connected to the fixing claw 820, and the cylinder 810 is inserted into the hole 700 of the fastening bolt 400. Preferably, the side cross-sectional view of the fixing claw 820 is L-shaped. The fixing claw 820 extends outward from the end of the cylinder 810, and the fixing claw 820 abuts against the lateral wall of the hexagonal nut 500. The fixing claw 820 is located in the middle position of the lateral wall of the hexagonal nut 500, and the end of the fixing claw 820 is also inserted into the arc hole 300.

[0030] like Figure 3 As shown, in the transformer core for preventing loosening provided in the embodiment of the present application, a fastening bolt 400 is inserted into the bolt holes 200 of multiple silicon steel sheets 100, and the fastening bolt 400 fixes the multiple silicon steel sheets 100 through nuts to form an iron core. The fastening bolt 400 is recessed inward along the axial direction and is provided with a hole 700, and a plurality of arc holes 300 are provided on the outermost silicon steel sheet 100, and the plurality of arc holes 300 are equidistantly distributed around the bolt hole 200 in the circumferential direction, and the cylinder 810 of the brake member 800 is inserted into the hole 700, and the fixing claw 820 of the brake member 800 abuts against the wall surface of the hexagonal nut 500, and the end of the fixing claw 820 is inserted into the arc hole 300. By adopting the above structural design, the fixing claw 820 of the brake member 800 can be fixed on the silicon steel sheet 100, and the fixing claw 820 can abut against the wall of the hexagonal nut 500, thereby preventing the hexagonal nut 600 from loosening in a circle, thereby effectively avoiding negative impacts on the transformer during operation.

[0031] In some embodiments, continuing as Figure 3 As shown, the overall length of the fastening bolt 400 is greater than the thickness of the iron core formed by the multiple silicon steel sheets 100, so the end of the fastening bolt 400 close to the hexagonal nut 500 will extend a portion in the direction away from the silicon steel sheet 100. The cylindrical body 810 of the brake member 800 is provided with a ring sleeve 830 adapted to the end of the fastening bolt 400. When the cylindrical body 810 is inserted into the hole 700 of the fastening bolt 400, the ring sleeve 830 on the cylindrical body 810 will be connected to the end of the fastening bolt 400 extending outward.

[0032] Preferably, the inner wall surface of the ring sleeve 830 that contacts the end of the fastening bolt 400 is provided with a magnetic sheet, through which the brake member 800 and the fastening bolt 400 can be adsorbed together, thereby effectively preventing the problem of loosening of the iron core caused by the rotation of the hexagonal nut 500.

[0033] In some embodiments, the arc length of each arc hole 300 is greater than the end width of the fixing claw 820 inserted therein, so that the fixing claw 820 has a certain range of motion to avoid direct hard contact between the fixing claw 820 and the hexagonal nut 500 and cause damage.

[0034] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0035] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0036] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0037] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0038] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0039] The term "substrate" as used herein refers to the material on which subsequent material layers are added. The substrate itself may be patterned. The material added on top of the substrate may be patterned, or may remain unpatterned. In addition, the substrate may include a wide range of materials, such as silicon, germanium, gallium arsenide, indium phosphide, etc. Alternatively, the substrate may be made of a non-conductive material (e.g., glass, plastic, or sapphire wafer, etc.).

[0040] The term "layer" used in the text may refer to a material portion including an area with a certain thickness. A layer may extend over the entire underlying structure or overlying structure, or may have a range smaller than the range of the underlying or overlying structure. In addition, a layer may be an area of ​​a homogeneous or inhomogeneous continuous structure, the thickness of which is less than the thickness of the continuous structure. For example, a layer may be located between the top surface and the bottom surface of the continuous structure or between any paired lateral planes at the top surface and the bottom surface. A layer may extend laterally, vertically and / or along a tapered surface. A substrate may be a layer, may include one or more layers therein, and / or may have one or more layers located thereon, above it and / or below it. A layer may include multiple layers. For example, an interconnect layer may include one or more conductors and a contact layer (forming contacts, interconnects and / or vias therein) and one or more dielectric layers.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A transformer core that prevents loosening, characterized in that: include: A plurality of silicon steel sheets (100), wherein the plurality of silicon steel sheets (100) are stacked to form an iron core, a bolt hole (200) is provided at a corner position of a surface of each silicon steel sheet (100), a plurality of arc holes (300) are further provided on the surface of the outermost silicon steel sheet (100), and the plurality of arc holes (300) are equidistantly distributed around the bolt hole (200) along the circumferential direction; A plurality of fastening bolts (400), wherein the plurality of fastening bolts (400) pass through the bolt holes (200), the nut heads of the fastening bolts (400) are in contact with the outer surface of the silicon steel sheet (100), the other ends of the fastening bolts (400) are threadedly connected with a hexagonal nut (500), and an inwardly recessed hole (700) is provided at the end of the fastening bolt (400) near the hexagonal nut (500); A brake member (800), the brake member (800) comprising a cylinder (810) and a fixing claw (820) arranged at the end of the cylinder (810), the cylinder (810) being inserted into the hole (700) of the fastening bolt (400), the wall surface of the fixing claw (820) being in contact with each wall surface of the hexagonal nut (500), and the end of the fixing claw (820) being inserted into the arc hole (300).

2. The anti-loosening transformer core according to claim 1, characterized in that: The other end of the fastening bolt (400) passes through the hexagonal nut (500) and extends outside the hexagonal nut (500); A ring sleeve (830) is provided at the position where the cylindrical body (810) contacts the fastening bolt (400), and the cylindrical body (810) is connected to the end of the fastening bolt (400) through the ring sleeve (830).

3. The anti-loosening transformer core according to claim 2, characterized in that: The wall surface inside the ring sleeve (830) is provided with a magnetic attraction sheet, and the ring sleeve (830) is adsorbed onto the wall surface of the hexagonal nut (500) through the magnetic attraction sheet.

4. The anti-loosening transformer core according to claim 1, characterized in that: The arc length of each arc-shaped hole (300) is greater than the width of the end of the fixing claw (820).

5. The anti-loosening transformer core according to claim 1, characterized in that: The cylindrical body (810) and the fixing claw (820) are integrally formed.

6. The anti-loosening transformer core according to claim 1, characterized in that: The fixing claw (820) is located at a middle position of the wall surface of the hexagonal nut (500).

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