Insulating cover body of rotary transformer

Abstract

The invention discloses an insulating cover body of a rotary transformer. The insulating cover body comprises a first insulating cover and a second insulating cover, the first insulating cover is arranged on a first surface in a pair of surfaces in the thickness direction of the stator core, and the first insulating cover is provided with a first surface corresponding part corresponding to the first surface; the second insulating cover is arranged on a second surface of the pair of surfaces in the thickness direction of the stator core, and the second insulating cover is provided with a second surface corresponding part corresponding to the second surface, a second elastic part extending from the second surface corresponding part to the first surface corresponding part, and a second convex part arranged on the second elastic part and protruding from the second elastic part along the first surface direction; the second elastic part is of an elastic deformation structure, so that the second convex part can move along the direction of the first surface; and through the movement of the second convex part, switching between one side, opposite to the first surface, of the second convex part mounting position and the second convex part dismounting position can be realized. According to the invention, the first insulation cap and the second insulation cap can be prevented from being separated from the stator core when the coil is wound on the tooth part.

Description

Technical Field

[0001] This invention relates to the field of rotary transformers, and more particularly to an insulating cover for a rotary transformer. Background Technology

[0002] Existing insulating covers for rotary transformers consist of a first insulating cover and a second insulating cover disposed on the stator core. The first insulating cover is disposed on one of a pair of opposing surfaces of the stator core along its thickness direction (first surface), and the second insulating cover is disposed on the other surface (second surface). The first and second insulating covers are clamped together along the thickness direction of the stator core, and the coil is wound around the teeth of the stator core through these two insulating covers.

[0003] However, in the existing structure, when the coil is wound around the teeth of the stator core through the first and second insulating covers, there is a problem that at least one of the first and second insulating covers may detach from the stator core. If at least one of the first and second insulating covers detaches from the stator core, it will be impossible to wind the coil onto the teeth in the predetermined shape. Therefore, it is necessary to develop a new type of insulating cover for the rotary transformer to overcome the above-mentioned problem. Summary of the Invention

[0004] Purpose of the invention: In view of the shortcomings and defects of the prior art, the present invention provides an insulating cover for a rotary transformer that can prevent the first insulating cap and the second insulating cap from detaching from the stator core when the coil is wound around the teeth.

[0005] Technical solution: The rotating transformer insulation cover of the present invention is characterized in that: it includes an insulation cover, which includes a first insulation cover and a second insulation cover; the first insulation cover is disposed on a first surface of a pair of surfaces in the thickness direction of the stator core, and the first insulation cover has a first surface corresponding to the first surface; the second insulation cover is disposed on a second surface of a pair of surfaces in the thickness direction of the stator core, and the second insulation cover has a second surface corresponding to the second surface, a second elastic portion extending from the second surface corresponding to the first surface corresponding to the first surface, and a second protrusion disposed on the second elastic portion and protruding from the second elastic portion along the direction of the first surface;

[0006] The second elastic part is an elastically deformable structure, which allows the second protrusion to move along the direction of the first surface; by moving the second protrusion, the position of the second protrusion facing away from the first surface can be switched between the second protrusion mounting position and the second protrusion disassembly position.

[0007] The second protrusion is mounted on the corresponding part of the first face; the second protrusion is dismounted from the mounting position.

[0008] The stator core is provided with slots for arranging coils; the second elastic part is arranged to pass through the inside of the slot.

[0009] The first insulating cover has a first wall on the side of the first surface opposite to the first surface; the second protrusion is arranged on the inner side of the first wall in the radial direction of the stator core; and the electromagnetic wire connected to the coil is arranged on the outer side of the first wall in the radial direction.

[0010] The first insulating cover includes a first elastic portion extending from a first face corresponding to a second face corresponding to a second face, and a first protrusion disposed on the first elastic portion and protruding from the first elastic portion along the direction of the second face;

[0011] The first elastic part is an elastically deformable structure, which allows the first protrusion to move along the direction of the second surface; by moving the first protrusion, it is possible to switch between the side of the first protrusion mounting position facing away from the second surface and the first protrusion disassembly position.

[0012] The first protrusion is mounted on a corresponding part of the second face; the first protrusion is dismounted from the mounting position.

[0013] The stator core is provided with a back section and several teeth.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention can suppress the first insulating cap and the second insulating cap from detaching from the stator core when the coil is wound around the tooth. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of the rotary transformer stator with the insulating cover described in Embodiment 1;

[0016] Figure 2 for Figure 1 The diagram shows an exploded three-dimensional structure of the stator of a rotary transformer.

[0017] Figure 3 for Figure 1 The diagram shows a planar structure of the stator of a rotary transformer.

[0018] Figure 4 For along Figure 3 A schematic diagram of the cross-sectional structure in the direction of the arrow along line IV-IV;

[0019] Figure 5 A three-dimensional structural diagram of the rotary transformer stator with the insulating cover described in Embodiment 2;

[0020] Figure 6 for Figure 5The diagram shows an exploded three-dimensional structure of the stator of a rotary transformer.

[0021] Figure 7 A cross-sectional view of the stator of the rotary transformer with the insulating cover described in Embodiment 3;

[0022] In the figure, 1 is the stator core; 2 is the insulating cover; 3 is the first insulating cover; 4 is the second insulating cover; 5 is the electromagnetic wire; 101 is the back of the core; 102 is the tooth; 103 is the slot; 104 is the first surface; 105 is the second surface; 301 is the corresponding part of the first surface; 302 is the first elastic part; 303 is the first protrusion; 304 is the first wall; 401 is the corresponding part of the second surface; 402 is the second elastic part; 403 is the second protrusion. Detailed Implementation

[0023] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1:

[0025] Figure 1 A three-dimensional structural diagram of the rotary transformer stator with the insulating cover of Embodiment 1; Figure 2 for Figure 1 The diagram shows an exploded three-dimensional structure of the stator of a rotary transformer. Figure 3 for Figure 1 The diagram shows a planar structure of the stator of a rotary transformer. Figure 4 For along Figure 3 The diagram shows a cross-sectional view along line IV-IV, with arrows pointing in that direction. The stator of the rotary transformer comprises a stator core 1, an insulating cover 2, and multiple coils (not shown).

[0026] The stator core 1 is formed in the shape of a plate. The stator core 1 has a core back 101 and a plurality of teeth 102.

[0027] Viewed from the thickness direction of the stator core 1, the back of the core 101 is formed in a ring shape. Each of the plurality of teeth 102 is integrally formed with the back of the core 101.

[0028] Multiple teeth 102 are arranged at equal intervals on the circumferential direction of the back of the iron core 101. Each tooth 102 extends radially from the back of the iron core 101 toward the inward side.

[0029] Multiple slots 103 are formed on the stator core 1. The multiple slots 103 are arranged at equal intervals along the circumference of the back of the core 101. Each slot 103 is formed by a pair of adjacent teeth 102 on the circumference of the back of the core 101 and the back of the core 101.

[0030] Each tooth 102 has a coil wound around it. Each slot 103 has a corresponding coil.

[0031] In the stator core 1, one of a pair of surfaces opposite each other along the thickness direction is designated as the first surface 104, and the other surface is designated as the second surface 105.

[0032] The insulating cover 2 has a first insulating cover 3 and a second insulating cover 4. The first insulating cover 3 and the second insulating cover 4 clamp the stator core 1 in the thickness direction.

[0033] A first insulating cover 3 is disposed on a first surface 104. The first insulating cover 3 has a corresponding portion 301 on the first surface.

[0034] The first face corresponding part 301 is disposed opposite to the first face 104. The first face corresponding part 301 is in contact with the first face 104.

[0035] The second insulating cover 4 is disposed on the second surface 105. The second insulating cover 4 has: a second surface corresponding portion 401, a plurality of second elastic portions 402, and a plurality of second protrusions 403. The plurality of second elastic portions 402 and the plurality of second protrusions 403 form a snap-fit ​​structure for fixing the second insulating cover 4 to the first insulating cover 3.

[0036] The second face corresponding part 401 is disposed opposite to the second face 105 and maintains contact with the second face 105.

[0037] The second elastic portion 402 is disposed on the second face corresponding portion 401 and extends along the thickness direction of the stator core 1 to the first face corresponding portion 301. The extending direction of the second elastic portion 402 is consistent with the thickness direction of the stator core 1.

[0038] Each second elastic portion 402 is provided with a second protrusion 403. Each second protrusion 403 protrudes outward from the second elastic portion 402 along the extending direction of the first surface 104, specifically, it protrudes outward radially along the back of the iron core 101.

[0039] Each second elastic portion 402 can elastically deform, allowing the corresponding second protrusion 403 to move along the extending direction of the first surface 104. When the second protrusion 403 moves along this direction, it can switch between the following two positions: Second protrusion mounting position: snapped onto the side surface of the corresponding portion 301 of the first surface facing away from the first surface 104.

[0040] Second protrusion disassembly position: the state of being offset and detached from the installation position.

[0041] When the second protrusion 403 is in the installation position, it snaps onto the back of the corresponding part 301 of the first side, so that the second insulating cover 4 and the first insulating cover 3 are fixed to each other, thereby effectively preventing the two insulating covers from separating and falling off from the stator core 1.

[0042] When no radially inward external force is applied to the second elastic part 402, the second protrusion 403 automatically maintains its installation position under the action of elastic force.

[0043] When the second protrusion 403 moves to the disassembly position, it disengages from the back of the corresponding part 301 of the first face, releasing the fixed state of the two insulating covers. At this time, the two insulating covers can be separated and removed from the stator core 1.

[0044] When the inward and outward forces on the radial direction of the back of the iron core 101 overcome the elastic force of the second elastic part 402 and act on the second elastic part 402, the second protrusion 403 will move to the disassembly position.

[0045] Each second elastic portion 402 is arranged to pass through the inner side of the corresponding groove 103. When the second protrusion 403 is in the disassembled position, the second protrusion 403 can pass smoothly through the inner space of the corresponding groove 103.

[0046] Next, the assembly steps for the rotary transformer will be described. First, the first insulating cap 3 is installed on the first surface 104. Then, the second insulating cap 4 is installed on the second surface 105. At this time, it is necessary to ensure that each of the plurality of second elastic parts 402 passes through the inner side of the corresponding slot 103, thereby installing the second insulating cap 4 on the second surface 105.

[0047] By providing an insulating cap 4 on the second surface 105, a plurality of second protrusions 403 pass through the inner side of their respective slots 103 and are attached to the surface of the corresponding portion 301 on the first surface opposite to the stator core 1.

[0048] Since the second protrusion 403 is attached to the surface of the first corresponding part 301 on the opposite side of the stator core 1, neither the first insulating cover 3 nor the second insulating cover 4 can easily detach from the stator core 1.

[0049] Next, a coil is wound on each of the plurality of teeth 102 through the first insulating cover 3 and the second insulating cover 4.

[0050] When winding the coil on the toothed portion 102, the stator core 1, the first insulating cover 3, and the second insulating cover 4 may vibrate. Even so, since the first insulating cover 3 and the second insulating cover 4 are not easily detached from the stator core 1, the coil can be wound on the toothed portion 102 according to the preset shape. At this point, the assembly process of the rotary transformer stator is completed.

[0051] As described above, the rotary transformer insulation cover 2 according to Embodiment 1 includes: a first insulation cover 3 disposed on a first surface 104 of the stator core 1, and a second insulation cover 4 disposed on a second surface 105 of the stator core 1. The first insulation cover 3 has a first surface corresponding portion 301 opposite to the first surface 104. The second insulation cover 4 includes: a second surface corresponding portion 401 opposite to the second surface 105, a second elastic portion 402 extending from the second surface corresponding portion 401 to the first surface corresponding portion 301, and a second protrusion 403 disposed on the second elastic portion 402.

[0052] The second protrusion 403 protrudes from the second elastic portion 402 along the direction of the first surface 104. The second elastic portion 402 is elastically deformable, allowing the second protrusion 403 to move along the direction of the first surface 104. By moving the second protrusion 403 along the direction of the first surface 104, the protrusion can switch between two positions: a second protrusion mounting position attached to the corresponding portion 301 of the first surface (opposite to the first surface 104), and a second protrusion detached position offset from the mounting position.

[0053] In this structure, when the second protrusion 403 is in the installation position, the separation between the first insulating cover 3 and the second insulating cover 4 is suppressed, thereby preventing them from falling off the stator core 1; while when the second protrusion 403 is moved to the disassembly position, the first insulating cover 3 and the second insulating cover 4 can be separated from each other, thereby realizing the disassembly of them from the stator core 1.

[0054] Furthermore, in the rotary transformer insulation cover 2 according to Embodiment 1, a slot 103 for arranging coils is formed on the stator core 1, and the second elastic portion 402 is provided to pass through the interior of the slot 103. With this structure, compared with the case where the second elastic portion is arranged on the radially outer side of the core back 101, the miniaturization of the rotary transformer stator can be achieved in the radial direction.

[0055] Example 2:

[0056] Figure 5 A three-dimensional structural diagram of the rotary transformer stator with the insulating cover of Embodiment 2; Figure 6 for Figure 5 The diagram shows an exploded three-dimensional structure of the stator of the rotary transformer. In this embodiment, the first insulating cover 3 of the rotary transformer insulating cover 2 is designed with multiple first elastic parts 302 and multiple first protrusions 303. These first elastic parts 302 and first protrusions 303 together constitute a snap-fit ​​connection mechanism for firmly fixing the first insulating cover 3 to the second insulating cover 4.

[0057] Each first elastic part 302 is disposed on the first face corresponding part 301.

[0058] Each first elastic portion 302 extends from the first face corresponding portion 301 to the second face corresponding portion 401, and its extension direction is consistent with the thickness direction of the stator core 1.

[0059] Each first protrusion 303 is respectively disposed on each first elastic part 302, and each elastic part is provided with a corresponding protrusion.

[0060] Each first protrusion 303 protrudes outward from the first elastic portion 302 along the direction of the second surface 105. Specifically, these protrusions protrude radially outward along the direction of the second surface 105 and toward the back of the iron core 101.

[0061] Each first elastic portion 302 is configured to be elastically deformable, so that the corresponding first protrusion 303 moves along the direction of the second surface 105. By moving the first protrusion 303 along the direction of the second surface 105, the first protrusion 303 moves between a first protrusion mounting position on the side of the corresponding portion 401 opposite to the second surface 105 and a first protrusion dismounting position offset from the first protrusion mounting position.

[0062] When the first protrusion 303 is in the first protrusion mounting position, the first protrusion 303 is attached to the side of the second surface 105 opposite to the second surface 105 of the corresponding part 401. Thus, the first insulating cover 3 is fixed relative to the second insulating cover 4. Therefore, the separation of the first insulating cover 3 and the second insulating cover 4 from each other is suppressed. Consequently, the separation of the first insulating cover 3 and the second insulating cover 4 from the stator core 1 is suppressed.

[0063] When no external force is applied to the first elastic part 302 to make the back of the iron core 101 radially inward, the position of the first protrusion 303 will be in the first protrusion mounting position due to the elastic force of the first elastic part 302.

[0064] When the first protrusion 303 is in the first protrusion disassembly position, the first protrusion 303 will detach from the side of the corresponding portion 401 of the second surface opposite to the second surface 105. If the first protrusion 303 is in the first protrusion disassembly position and the second protrusion 403 is in the second protrusion disassembly position, the first insulating cover 3 and the second insulating cover 4 can be separated from each other. Thus, both the first insulating cover 3 and the second insulating cover 4 can be removed from the stator core 1.

[0065] When an external force is applied to the first elastic part 302 to make the back of the iron core 101 radially inward, and the external force overcomes the elastic force of the first elastic part 302, the position of the first protrusion 303 will move to the first protrusion disassembly position.

[0066] Each first elastic portion 302 is configured to pass through the inner side of its respective plurality of grooves 103. When the first protrusion 303 is in the first protrusion disassembled position, the first protrusion 303 can pass through the inner side of the corresponding groove 103.

[0067] In the circumferential direction of the back surface 101 of the iron core, the positions of the first elastic portion 302 and the second elastic portion 402 are offset from each other. Therefore, in the circumferential direction of the back surface 101 of the iron core, the positions of the first protrusion 303 and the second protrusion 403 are also offset from each other.

[0068] The other structures of the rotary transformer insulation cover 2 involved in Example 2 are the same as those of the rotary transformer insulation cover 2 involved in Example 1.

[0069] As described above, in the rotary transformer insulation cover 2 according to Embodiment 2, the first insulation cap 3 has: a first elastic portion 302 extending from a first face corresponding portion 301 to a second face corresponding portion 401, and a first protrusion 303 provided on the first elastic portion 302. The first protrusion 303 protrudes from the first elastic portion 302 in the direction of the second face 105. The first elastic portion 302 is elastically deformable to move the first protrusion 303 in the direction of the second face 105. By moving the first protrusion 303 in the direction of the second face 105, the first protrusion 303 can move between a first protrusion mounting position engaged with the face of the second face corresponding portion 401 opposite to the second face 105, and a first protrusion dismounting position offset from the first protrusion mounting position. According to this structure, by positioning the first protrusion 303 at the first protrusion mounting position, the separation of the first insulation cap 3 and the second insulation cap 4 can be more reliably suppressed. Thus, the first insulation cap 3 and the second insulation cap 4 can be more reliably prevented from detaching from the stator core 1. Furthermore, by positioning the first protrusion 303 at the first protrusion disassembly position and simultaneously positioning the second protrusion 403 at the second protrusion disassembly position, the first insulating cover 3 and the second insulating cover 4 can be separated. This allows the first insulating cover 3 and the second insulating cover 4 to be removed from the stator core 1.

[0070] It should be noted that in the rotary transformer insulation cover 2 described in Embodiment 2, the first insulation cover 3 is shown to have a structure with multiple first elastic portions 302 and multiple first protrusions 303. However, the first insulation cover 3 only needs to have a structure with at least one first elastic portion 302 and at least one first protrusion 303.

[0071] Example 3:

[0072] Figure 7This is a cross-sectional view of the stator of the rotary transformer with the insulating cover of Embodiment 3. In the rotary transformer insulating cover 2 of Embodiment 3, the first insulating cover 3 has a plurality of first walls 304. Each first wall 304 stands on the side surface of the corresponding portion 301 of the first surface opposite to the first surface 104. The plurality of first walls 304 are respectively provided in a one-to-one correspondence with a plurality of second protrusions 403.

[0073] Each second protrusion 403 is disposed radially on the inner side of the corresponding first wall 304 of the stator core 1. The radial direction of the stator core 1 is the same as the radial direction of the core back 101.

[0074] Each coil is connected to multiple electromagnetic wires 5. Each electromagnetic wire 5 is arranged radially along the outer side of each first wall 304 of the stator core 1. Each electromagnetic wire 5 is in contact with each first wall 304.

[0075] The other structures of the rotary transformer insulating cap 2 involved in Embodiment 3 are the same as those of the rotary transformer insulating cap 2 involved in Embodiment 1. In addition, the rotary transformer insulating cover 2 involved in Embodiment 3 can also adopt the same structure as in Embodiment 2, that is, the first insulating cover 3 has a first elastic part 302 and a first protrusion 303.

[0076] As described above, in the rotary transformer insulation cover 2 according to Embodiment 3, the first insulation cover 3 has a first wall 304 disposed on the side opposite to the first surface 104 in the corresponding portion 301 of the first surface. A second protrusion 403 is disposed radially on the inner side of the first wall 304. The electromagnetic wire 5 connected to the coil is arranged radially on the outer side of the first wall 304 of the stator core 1. This structure effectively prevents the second protrusion 403 from contacting the electromagnetic wire 5. Therefore, the problem of breakage of the electromagnetic wire 5 due to contact between the second protrusion 403 and the electromagnetic wire 5 can be avoided.

[0077] It should be noted that in the rotary transformer insulation cover 2 described in Embodiment 3, the first insulation cover 3 is shown to have a structure with a first wall 304. However, the second insulation cover 4 may also have a structure in which a second wall is provided on the opposite side of the second surface 105 in the corresponding portion 401 of the second surface. In this case, the electromagnetic wire 5 will be arranged radially along the outer side of the second wall of the stator core 1.

[0078] Furthermore, in the rotary transformer insulation cover 2 of various embodiments, it has been described that the second insulation cover 4 has a structure having a plurality of second elastic portions 402 and a plurality of second protrusions 403. However, the second insulation cover 4 only needs to have at least one second elastic portion 402 and at least one second protrusion 403.

[0079] The preferred embodiments of the rotary transformer insulation cover 2 have been described in detail above, but the present invention is not limited to the rotary transformer insulation cover 2 described in the above embodiments. Various modifications and variations can be made to the rotary transformer insulation cover 2 described in the above embodiments without departing from the scope of the claims.

Claims

1. An insulating cover for a rotary transformer, characterized in that: The device includes an insulating cover (2), which includes a first insulating cover (3) and a second insulating cover (4). The first insulating cover (3) is disposed on a first surface (104) of a pair of surfaces in the thickness direction of the stator core (1), and the first insulating cover (3) is provided with a first surface corresponding to the first surface (104) (301). The second insulating cover (4) is disposed on a second surface (105) of a pair of surfaces in the thickness direction of the stator core (1), and the second insulating cover (4) is provided with a second surface corresponding to the second surface (105) (401), a second elastic part (402) extending from the second surface corresponding part (401) to the first surface corresponding part (301), and a second protrusion (403) disposed on the second elastic part (402) and protruding from the second elastic part (402) along the direction of the first surface (104). The second elastic part (402) is an elastically deformable structure, which allows the second protrusion (403) to move along the direction of the first surface (104). By moving the second protrusion (403), the position of the second protrusion (403) can be switched between the side opposite to the first surface (104) of the mounting position and the disassembly position of the second protrusion (403).

2. The insulating cover for a rotary transformer according to claim 1, characterized in that: The second protrusion (403) is mounted on the corresponding part (301) of the first face; the second protrusion (403) is dismounted from the mounting position.

3. The insulating cover for a rotary transformer according to claim 1, characterized in that: The stator core (1) is provided with a slot (103) for arranging coils; the second elastic part (402) is provided in such a way that it passes through the inside of the slot (103).

4. The insulating cover for a rotary transformer according to claim 3, characterized in that: The first insulating cover (3) has a first wall (304) on the side of the first face (104) opposite to the first face (301); the second protrusion (403) is arranged on the inner side of the first wall (304) in the radial direction of the stator core (1); the electromagnetic wire (5) connected to the coil is arranged on the outer side of the first wall (304) in the radial direction.

5. The insulating cover of the rotary transformer according to any one of claims 1-4, characterized in that: The first insulating cover (3) includes a first elastic portion (302) extending from the first face corresponding portion (301) to the second face corresponding portion (401), and a first protrusion (303) disposed on the first elastic portion (302) and protruding from the first elastic portion (302) along the direction of the second face (105); The first elastic part (302) is an elastically deformable structure, which allows the first protrusion (303) to move along the direction of the second surface (105). By moving the first protrusion (303), the position of the first protrusion (303) facing away from the second surface (105) can be switched between the installation position of the first protrusion (303) and the disassembly position of the first protrusion (303).

6. The insulating cover for a rotary transformer according to claim 5, characterized in that: The first protrusion (303) is mounted on the corresponding part (401) of the second side; the first protrusion (303) is dismounted from the mounting position.

7. The insulating cover for a rotary transformer according to claim 1, characterized in that: The stator core (1) is provided with a core back (101) and a number of teeth (102).

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