A transformer and an insulating framework thereof

Abstract

The utility model relates to a kind of transformer and its insulation framework. Insulation framework includes framework main body, and first baffle and second baffle are fixedly arranged with interval on the both ends of framework main body along axial direction, and installation protrusion is set on the first baffle and the second baffle, and each installation protrusion is set with binding post. At least one intermediate baffle is movably arranged with interval on framework main body between first baffle and second baffle along axial direction, and intermediate baffle includes left limit plate, intermediate layer plate and right limit plate movably sleeved on framework main body along axial direction, and fixed structure for fixing intermediate layer plate on framework main body is arranged between left limit plate, intermediate layer plate and right limit plate. When the number of turns of primary coil or secondary coil needs to be changed, the size of winding position of coil winding on both sides can be adjusted by changing the position of intermediate baffle, the requirement of different number of turns ratio between primary coil and secondary coil can be met, and the versatility of insulation framework is increased.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a transformer and its insulation frame. Background Technology

[0002] Transformers generally consist of an insulating frame on which primary coils, secondary coils, and an iron core are wound. Control transformers are typically connected to a circuit board, and their insulating frames are often made of plastic. Existing transformer insulating frames, such as the one disclosed in Chinese Utility Model Patent No. CN 214279769 U, include a frame body with at least three partitions spaced axially on it. A coil winding position is formed between two adjacent partitions. Two partitions at the axial ends are respectively provided with a first mounting protrusion and a second mounting protrusion. Each mounting protrusion has a pin, or lead, which is an L-shaped pin. The vertical part of the L-shaped pin is used for the conductive connection of the corresponding coil winding, and the horizontal part is used for fixed connection to the circuit board.

[0003] However, the position of the partition in the middle of the existing insulating frame is fixed, which means that the number of turns in the two coil windings is also relatively fixed. If it is necessary to significantly increase the number of turns in at least one coil winding, the only way is to increase the radial dimension. However, this increase is very limited and can easily cause the radial dimension of the coil to protrude beyond the insulating frame, making installation impossible. Therefore, this leads to the need to produce a wide variety of insulating frames, resulting in poor versatility of the existing insulating frames. Utility Model Content

[0004] The purpose of this utility model is to provide an insulating frame for a transformer to solve the problem of poor versatility of insulating frames in the prior art; at the same time, the purpose of this utility model is also to provide a transformer using the above-mentioned insulating frame.

[0005] To achieve the above objectives, the present invention provides an insulating frame for a transformer, comprising a frame body, wherein a first partition and a second partition are fixedly disposed at intervals along the axial direction at both ends of the frame body, and each of the first and second partitions is provided with mounting protrusions, each mounting protrusion being provided with a wiring pin; at least one intermediate partition is movably disposed along the axial direction between the first and second partitions on the frame body, the intermediate partition including a left limiting plate, a middle layer plate and a right limiting plate movably fitted onto the frame body along the axial direction, and a fixing structure for fixing the middle layer plate to the frame body is provided between the left limiting plate, the middle layer plate and the right limiting plate.

[0006] The fixing structure includes mounting holes on the intermediate layer plate for upward movement along the axial direction of the main frame. Left and right limiting plates are respectively provided with left and right fitting holes for guiding upward movement along the axial direction of the main frame. A left wedge-shaped protrusion with an annular structure is provided around the opening of the left fitting hole on the left limiting plate, and a right wedge-shaped protrusion with an annular structure is provided around the opening of the right fitting hole on the right limiting plate. The left and right wedge-shaped protrusions are used to insert into the mounting holes of the intermediate layer plate, and the left and right wedge-shaped protrusions have a wedge-shaped surface structure that fits and presses against each other so that the left and right wedge-shaped protrusions together tension and press against the inner wall of the mounting hole and the main frame, thereby fixing the intermediate layer plate to the main frame.

[0007] The left limiting plate, the middle layer plate, and the right limiting plate are all two-half structures, each including a first half structure and a second half structure. The first half structure has a first step, and the second half structure has a second step corresponding to the first step. A mounting post is provided on the first step, and a locking protrusion is provided at the end of the mounting post. A locking hole is provided on the second step for the mounting post to pass through. The locking protrusion passes through the locking hole and cooperates with the side limiting locking of the second step of the slot.

[0008] The locking hole is a stepped hole. The small diameter section is for the mounting post to pass through, and the stepped surface between the small diameter section and the large diameter section is used to cooperate with the locking protrusion to limit the locking, so that the end face of the mounting post is located inside the locking hole.

[0009] Limiting structures are provided between the left limiting plate and the middle layer plate, and between the right limiting plate and the middle layer plate.

[0010] The limiting structure includes a left limiting post on the left side of the middle layer plate and a right limiting post on the right side of the middle layer plate. The left limiting post is provided with a left limiting hole that cooperates with the left limiting post, and the right limiting post is provided with a right limiting hole that cooperates with the right limiting post. Each limiting post and its corresponding limiting hole are tightly fitted or locked together.

[0011] The number of intermediate partitions is one.

[0012] The main body of the skeleton is provided with insertion holes along the axial direction for the middle protrusion of the "mountain" shaped iron core to be inserted. The first and second partitions are provided with limiting protrusions, which together with the corresponding mounting protrusions limit the corresponding iron core.

[0013] Two insulating cover plates are symmetrically arranged on the first and second partition plates, so that the inner side of the protruding edges at both ends of the "mountain" shaped iron core can be fixedly clamped on the first and second partition plates.

[0014] The present invention provides a transformer with the following technical solution: A transformer includes an insulating frame, a primary coil, a secondary coil, and an iron core. The insulating frame includes a frame body. A first partition and a second partition are fixedly arranged at two intervals along the axial direction on the frame body. Each of the first and second partitions is provided with a mounting protrusion, and each mounting protrusion is provided with a wiring pin. At least one intermediate partition is movably arranged along the axial direction between the first and second partitions on the frame body. The intermediate partition includes a left limiting plate, a middle layer plate, and a right limiting plate that are movably fitted onto the frame body along the axial direction. A fixing structure for fixing the middle layer plate to the frame body is provided between the left limiting plate, the middle layer plate, and the right limiting plate.

[0015] The fixing structure includes mounting holes on the intermediate layer plate for upward movement along the axial direction of the main frame. Left and right limiting plates are respectively provided with left and right fitting holes for guiding upward movement along the axial direction of the main frame. A left wedge-shaped protrusion with an annular structure is provided around the opening of the left fitting hole on the left limiting plate, and a right wedge-shaped protrusion with an annular structure is provided around the opening of the right fitting hole on the right limiting plate. The left and right wedge-shaped protrusions are used to insert into the mounting holes of the intermediate layer plate, and the left and right wedge-shaped protrusions have a wedge-shaped surface structure that fits and presses against each other so that the left and right wedge-shaped protrusions together tension and press against the inner wall of the mounting hole and the main frame, thereby fixing the intermediate layer plate to the main frame.

[0016] The left limiting plate, the middle layer plate, and the right limiting plate are all two-half structures, each including a first half structure and a second half structure. The first half structure has a first step, and the second half structure has a second step corresponding to the first step. A mounting post is provided on the first step, and a locking protrusion is provided at the end of the mounting post. A locking hole is provided on the second step for the mounting post to pass through. The locking protrusion passes through the locking hole and cooperates with the side limiting locking of the second step of the slot.

[0017] The locking hole is a stepped hole. The small diameter section is for the mounting post to pass through, and the stepped surface between the small diameter section and the large diameter section is used to cooperate with the locking protrusion to limit the locking, so that the end face of the mounting post is located inside the locking hole.

[0018] Limiting structures are provided between the left limiting plate and the middle layer plate, and between the right limiting plate and the middle layer plate.

[0019] The limiting structure includes a left limiting post on the left side of the middle layer plate and a right limiting post on the right side of the middle layer plate. The left limiting post is provided with a left limiting hole that cooperates with the left limiting post, and the right limiting post is provided with a right limiting hole that cooperates with the right limiting post. Each limiting post and its corresponding limiting hole are tightly fitted or locked together.

[0020] The number of intermediate partitions is one.

[0021] The main body of the skeleton is provided with insertion holes along the axial direction for the middle protrusion of the "mountain" shaped iron core to be inserted. The first and second partitions are provided with limiting protrusions, which together with the corresponding mounting protrusions limit the corresponding iron core.

[0022] Two insulating cover plates are symmetrically arranged on the first and second partition plates, so that the inner side of the protruding edges at both ends of the "mountain" shaped iron core can be fixedly clamped on the first and second partition plates.

[0023] The beneficial effects of this utility model are as follows: When it is necessary to change the number of turns of the primary coil or the secondary coil and the current space size of the coil winding position cannot meet the requirements, the size of the coil winding position on both sides can be adjusted by changing the position of the middle partition. This can meet the requirements of different turns ratios between the primary coil and the secondary coil and increase the versatility of the insulation frame. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the insulating frame in one embodiment of a transformer according to this utility model; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 yes Figure 1 A schematic diagram of the structure after the insulating cover plate has been removed; Figure 4 yes Figure 3 A magnified view of a section at point B in the middle; Figure 5 This is a cross-sectional view of the insulating frame in the diagram; Figure 6 yes Figure 5 A magnified view of a section at point C; Figure 7 yes Figure 5 A schematic diagram of the installation structure after the left and right limiting plates are combined; Figure 8 yes Figure 7 A magnified view of a section at point D. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0026] It should be noted that, unless otherwise defined, the technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The use of "belonging" in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this invention.

[0027] An embodiment of a transformer according to this utility model includes an insulating frame, a primary coil, a secondary coil, and an iron core. The insulating frame, such as... Figures 1-8 As shown, the system includes a frame body 1. A first partition 2 and a second partition 3 are fixedly arranged at two intervals along the axial direction on the frame body 1. A first mounting protrusion 10 is provided on the first partition 2, and a second mounting protrusion 11 is provided on the second partition 3. Each mounting protrusion is provided with a wiring pin 12.

[0028] At least one intermediate partition 4 is axially movable on the frame body 1 between the first partition 2 and the second partition 3. In this embodiment, there is one intermediate partition 4. In this embodiment, the intermediate partition 4 includes a left limiting plate 6, an intermediate layer plate 8, and a right limiting plate 7 axially movably fitted onto the frame body 1. A fixing structure for fixing the intermediate layer plate to the frame body is provided between the left limiting plate 6, the intermediate layer plate 8, and the right limiting plate 7. Specifically, the fixing structure includes a mounting hole 20 on the intermediate layer plate 8 for upward movement along the axial direction of the frame body, such as... Figure 6 As shown, the left and right limiting plates are respectively provided with a left fitting hole and a right fitting hole that guide and move upward along the axis of the main frame. A left wedge-shaped protrusion 21 with an annular structure is provided around the opening of the left fitting hole on the left limiting plate, and a right wedge-shaped protrusion 22 with an annular structure is provided around the opening of the right fitting hole on the right limiting plate. The left wedge-shaped protrusion 21 and the right wedge-shaped protrusion 22 are used to insert into the mounting hole 20 of the intermediate layer plate, and the left wedge-shaped protrusion 21 and the right wedge-shaped protrusion 22 have a wedge-shaped structure that fits and presses against each other, so that the left and right wedge-shaped protrusions together tension and press against the inner wall of the mounting hole and the main frame plate, thereby fixing the intermediate layer plate to the main frame plate. The wedge structure includes a first wedge surface of a left wedge protrusion 21 and a second wedge surface of a right wedge protrusion 22. The first and second wedge surfaces are arranged opposite each other and squeeze and fit together. When the first and second wedge surfaces squeeze and fit together, the upper side of the left wedge protrusion 21 will be squeezed and deformed outward to squeeze the wall of the mounting hole, and the right wedge protrusion 22 will be squeezed and deformed inward to squeeze the outer surface of the skeleton body.

[0029] To ensure that the wedge-shaped structures of the left and right limiting plates do not detach, and in other words, to ensure that the middle partition 4 is firmly and stably attached to the main frame 1, limiting structures are provided between the left limiting plate and the middle layer plate, and between the right limiting plate and the middle layer plate. The limiting structures include a left limiting post 19 on the left surface of the middle layer plate 8 and a right limiting post on the right surface. The left limiting plate has a left limiting hole 20 that engages with the left limiting post, and the right limiting plate has a right limiting hole that engages with the right limiting post. Each limiting post and its corresponding limiting hole are either tightly fitted or interlocked. In this embodiment, a tight fit is selected.

[0030] In this embodiment, to facilitate the installation of the left limiting plate 6, the middle layer plate 8, and the right limiting plate 7 on the frame body 1, the left limiting plate 6, the middle layer plate 8, and the right limiting plate 7 are all two-half structures, each including a first half structure 13 and a second half structure 14. Specifically, the first half structure 13 has a first step 15, and the second half structure 14 has a second step 16 corresponding to and adapted to the first step 15. A mounting post 18 is provided on the first step 15, and a locking protrusion is provided at the end of the mounting post. A locking hole 17 is provided on the second step 16 for the mounting post to pass through. The locking protrusion passes through the locking hole and engages with the side limiting locking of the second step in the slot. In this embodiment, there are two first steps located at the two ends of the first half structure of the "U"-shaped structure; similarly, there are also two second steps located at the two ends of the second half structure of the "U"-shaped structure. In this embodiment, the locking hole is a stepped hole. The small diameter section is for the mounting post to pass through, and the stepped surface between the small diameter section and the large diameter section is used to cooperate with the locking protrusion to limit the locking, so that the end face of the mounting post is located inside the locking hole, which does not affect the winding of the coil on the bobbin body.

[0031] In this embodiment, the main body 1 of the skeleton is provided with an insertion hole 5 along the axial direction for the middle protrusion of the "mountain" shaped iron core to be inserted. Both the first and second partitions are provided with limiting protrusions 9, which, together with the corresponding mounting protrusions, limit the corresponding iron core. Two insulating cover plates 23 are symmetrically arranged on the first and second partitions for the inner sides of the protrusions at both ends of the "mountain" shaped iron core to be fixedly fastened to the first and second partitions.

[0032] When it is necessary to change the number of turns of the primary or secondary coil and the current space size of the coil winding position cannot meet the requirements, the size of the coil winding position on both sides can be adjusted by changing the position of the middle partition. This can meet the requirements of different turns ratios between the primary and secondary coils and increase the versatility of the insulation frame.

[0033] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "joined" should be interpreted broadly. For example, the term "joined" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0035] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0036] In other embodiments of this utility model, each limiting post and its corresponding limiting hole are selected to engage with a locking mechanism, that is, a locking protrusion is provided at the end of the limiting post, and the locking protrusion passes through the limiting hole and engages with the opening; the number of intermediate partitions can also be adjusted according to actual needs.

[0037] The embodiment of the insulating frame of the transformer of this utility model has the same structure as the insulating frame in the various embodiments of the transformer described above, and will not be repeated here.

Claims

1. An insulating frame for a transformer, comprising a frame body, wherein a first partition and a second partition are fixedly disposed at intervals at both ends along the axial direction of the frame body, and each of the first and second partitions is provided with a mounting protrusion, and each mounting protrusion is provided with a terminal pin, characterized in that: At least one intermediate partition is axially movable between the first partition and the second partition on the main body of the skeleton. The intermediate partition includes a left limiting plate, a middle layer plate and a right limiting plate that are axially movably fitted onto the main body of the skeleton. A fixing structure for fixing the middle layer plate to the main body of the skeleton is provided between the left limiting plate, the middle layer plate and the right limiting plate.

2. The insulating frame of the transformer according to claim 1, characterized in that: The fixing structure includes mounting holes on the intermediate layer plate for upward movement along the axial direction of the main frame. Left and right limiting plates are respectively provided with left and right fitting holes for guiding upward movement along the axial direction of the main frame. A left wedge-shaped protrusion with an annular structure is provided around the opening of the left fitting hole on the left limiting plate, and a right wedge-shaped protrusion with an annular structure is provided around the opening of the right fitting hole on the right limiting plate. The left and right wedge-shaped protrusions are used to insert into the mounting holes of the intermediate layer plate, and the left and right wedge-shaped protrusions have a wedge-shaped surface structure that fits and presses against each other so that the left and right wedge-shaped protrusions together tension and press against the inner wall of the mounting hole and the main frame, thereby fixing the intermediate layer plate to the main frame.

3. The insulating frame of the transformer according to claim 2, characterized in that: The left limiting plate, the middle layer plate, and the right limiting plate are all two-half structures, each including a first half structure and a second half structure. The first half structure has a first step, and the second half structure has a second step corresponding to the first step. A mounting post is provided on the first step, and a locking protrusion is provided at the end of the mounting post. A locking hole is provided on the second step for the mounting post to pass through. The locking protrusion passes through the locking hole and cooperates with the side limiting locking of the second step of the slot.

4. The insulating frame of the transformer according to claim 3, characterized in that: The locking hole is a stepped hole. The small diameter section is for the mounting post to pass through, and the stepped surface between the small diameter section and the large diameter section is used to cooperate with the locking protrusion to limit the locking, so that the end face of the mounting post is located inside the locking hole.

5. The insulating frame of the transformer according to claim 3 or 4, characterized in that: Limiting structures are provided between the left limiting plate and the middle layer plate, and between the right limiting plate and the middle layer plate.

6. The insulating frame of the transformer according to claim 5, characterized in that: The limiting structure includes a left limiting post on the left side of the middle layer plate and a right limiting post on the right side of the middle layer plate. The left limiting post is provided with a left limiting hole that cooperates with the left limiting post, and the right limiting post is provided with a right limiting hole that cooperates with the right limiting post. Each limiting post and its corresponding limiting hole are tightly fitted or locked together.

7. The insulating frame of the transformer according to claim 1, characterized in that: The number of intermediate partitions is one.

8. The insulating frame of the transformer according to any one of claims 1-7, characterized in that: The main body of the skeleton is provided with insertion holes along the axial direction for the middle protrusion of the "mountain" shaped iron core to be inserted. The first and second partitions are provided with limiting protrusions, which together with the corresponding mounting protrusions limit the corresponding iron core.

9. The insulating frame of the transformer according to claim 8, characterized in that: Two insulating cover plates are symmetrically arranged on the first and second partition plates, so that the inner side of the protruding edges at both ends of the "mountain" shaped iron core can be fixedly clamped on the first and second partition plates.

10. A transformer, comprising an insulating frame, a primary coil, a secondary coil, and an iron core, characterized in that: The insulating frame is the insulating frame described in any one of claims 1-9.

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