A stator frame for a rotary transformer

Abstract

The stator skeleton for a rotary transformer provided by the utility model comprises a skeleton body in a circular ring shape, a connector connected to the outer wall surface of the skeleton body and extending horizontally outward, a PIN needle and a bottom cover plate, wherein the PIN needle comprises a needle head and a flat plate portion vertically connected to the needle head, the needle head portion is inserted on the upper surface of the connector and extends vertically upward, the flat plate portion is buried in the connector, a through groove penetrating the connector along the up-down direction is provided on the connector, the position of the through groove corresponds to the flat plate portion, the flat plate portion is horizontally placed in the through groove, the upper and lower surfaces of at least a part of the flat plate portion are exposed from the upper and lower notches of the through groove, the bottom cover plate is detachably connected to the bottom of the connector, when the bottom cover plate is connected to the bottom of the connector, the bottom cover plate blocks the lower notch of the through groove, ultrasonic welding at the flat plate portion of the PIN needle is facilitated by disassembling and assembling the bottom cover plate, and the lower notch is blocked after welding, so as to avoid short circuit and play a certain collision protection role.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator frame for a rotary transformer. Background Art

[0002] A resolver / transformer is an electromagnetic sensor, also known as a synchronous resolver. It is a small AC motor used to measure the angular displacement and angular velocity of a rotating object's shaft. It consists of a stator and a rotor, wherein the stator includes an annular stator frame, a stator core wrapped in the stator frame, and a stator winding wound on the stator frame.

[0003] In order to more conveniently connect the ends of the stator windings and realize the transmission of signals and electric energy, the existing stator frame usually has a connector extending outward in the radial direction. For example, Chinese patents CN206711727U, CN220189419U, and CN215933346U all disclose such stator frames. However, in order to facilitate ultrasonic welding at the PIN pin flat plate portion, most of the bottoms of the connectors on such stator frames are not provided with shielding members so as to expose the lower notch at the position corresponding to the PIN pin flat plate portion on the connector. After the welding is completed, the lower notch is in an exposed state, which is easy to cause a short circuit of the rotary transformer due to the entry of debris. At the same time, the uncovered bottom of the connector is also easy to be damaged by collision. Utility Model Content

[0004] The purpose of the utility model is to overcome one or more shortcomings in the prior art and to provide a stator frame for a rotary transformer.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the stator frame for the rotary transformer includes:

[0006] A skeleton body, wherein the skeleton body is in a ring shape;

[0007] A connector, the connector being connected to an outer wall surface of the skeleton body and extending outward horizontally;

[0008] A PIN needle, the PIN needle comprising a needle head and a flat plate portion vertically connected to the needle head, the needle head being inserted on the upper surface of the connector and extending vertically upward, and the flat plate portion being buried in the connector;

[0009] The connector is provided with a through groove penetrating the connector in the up-down direction, the position of the through groove corresponds to the flat plate portion, the flat plate portion lies transversely in the through groove, so that at least a part of the upper and lower surfaces of the flat plate portion are exposed from the upper and lower notches of the through groove;

[0010] The stator frame for the rotary transformer also includes a bottom cover plate, which is detachably connected to the bottom of the connector. When the bottom cover plate is connected to the bottom of the connector, the bottom cover plate blocks the lower notch of the through slot.

[0011] Preferably, the bottom cover plate is detachably connected to the bottom of the connector via a plug-in structure, the plug-in structure comprises a plug-in slot provided on the connector and a plug-in column provided on the bottom cover plate, the plug-in slot comprises a first plug-in slot provided on both side walls of the connector and a second plug-in slot provided on the outer end surface of the connector, the plug-in column comprises a first plug-in column corresponding to the first plug-in slot and a second plug-in column corresponding to the second plug-in slot.

[0012] Further preferably, the first plug-in slot includes a first vertical slot penetrating the bottom surface of the connector in a vertical direction and a first horizontal slot vertically connected to the upper end of the first vertical slot, the first horizontal slot is located on the outer side of the first vertical slot and extends horizontally outward, the first plug-in column includes a first vertical column corresponding to the first vertical slot and a first horizontal column corresponding to the first horizontal slot, the slot width of the first vertical slot in the inner and outer directions is greater than or equal to the sum of the thickness of the first vertical column in the inner and outer directions and the extension length of the first horizontal column, and the extension length of the first horizontal slot is greater than or equal to the extension length of the first horizontal column.

[0013] Further preferably, the side wall of the bottom cover plate facing the frame body is an arc-shaped surface, the arc-shaped surface is parallel to and spaced apart from the outer wall surface of the frame body, and the width of the space is greater than or equal to the extension length of the first horizontal column.

[0014] Further preferably, the second plug-in slot includes a second vertical slot running through the bottom surface of the connector in a vertical direction and a second horizontal slot vertically connected to the upper end of the second vertical slot, the second horizontal slot is located on the inner side of the second vertical slot and extends horizontally inward, the second plug-in column includes a second vertical column corresponding to the second vertical slot and a second horizontal column corresponding to the second horizontal slot, the slot width of the second vertical slot in the inner and outer directions is equal to the thickness of the second vertical column in the inner and outer directions, and the extension length of the second horizontal slot is greater than or equal to the extension length of the second horizontal column.

[0015] Further preferably, there are a plurality of the second plugging slots, the plurality of the second plugging slots are spaced apart along the width direction of the connector, and the second plugging slots are not connected to the through slots.

[0016] Further preferably, when the bottom cover is connected to the connector, the two side walls of the bottom cover are flush with the two side walls of the connector, the outer end surface of the bottom cover is flush with the outer end surface of the connector, and all of the plug-in posts are located in the plug-in slots.

[0017] Preferably, the stator frame for the rotary transformer further comprises winding teeth connected to the inner wall surface of the frame body, an annular flange connected to the upper edge of the outer wall surface of the frame body, and a wire passing post connected to the upper end surface of the frame body.

[0018] Preferably, a notch corresponding to the connector is provided on the annular flange, so that the upper end surface of the connector is flush with the upper end surface of the skeleton body and connected as a whole, and the parts of the annular flange located on both sides of the notch extend outward along the outer contour of the connector to form a rib on the upper edge of the two side walls of the connector.

[0019] Preferably, there are a plurality of PIN pins, and the plurality of PIN pins are distributed at intervals along the width direction of the connector.

[0020] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0021] The stator skeleton for a rotary transformer provided by the utility model comprises a skeleton body in a circular ring shape, a connector connected to the outer wall surface of the skeleton body and extending horizontally outward, a PIN needle and a bottom cover plate, wherein the PIN needle comprises a needle head and a flat plate portion vertically connected to the needle head, the needle head portion is inserted on the upper surface of the connector and extends vertically upward, the flat plate portion is buried in the connector, a through groove penetrating the connector along the up-down direction is provided on the connector, the position of the through groove corresponds to the flat plate portion, the flat plate portion is horizontally placed in the through groove, the upper and lower surfaces of at least a part of the flat plate portion are exposed from the upper and lower notches of the through groove, the bottom cover plate is detachably connected to the bottom of the connector, when the bottom cover plate is connected to the bottom of the connector, the bottom cover plate blocks the lower notch of the through groove, ultrasonic welding at the flat plate portion of the PIN needle is facilitated by disassembling and assembling the bottom cover plate, and the lower notch is blocked after welding, so as to avoid short circuit and play a certain collision protection role. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 , Figure 2 It is a three-dimensional schematic diagram of a preferred embodiment of the utility model.

[0023] Figure 3 yes Figure 2 A three-dimensional schematic diagram after the bottom cover is hidden.

[0024] Figure 4 yes Figure 2 Schematic diagram of the midsole cover.

[0025] Figure 5 yes Figure 1 Schematic top view of .

[0026] Figure 6 yes Figure 5 Schematic cross-sectional view along the AA direction.

[0027] Figure 7 yes Figure 5 Schematic cross-sectional view along the BB direction.

[0028] Figure 8 yes Figure 5 Schematic cross-sectional view in the CC direction.

[0029] Among them: 10. Skeleton body; 11. Winding teeth; 12. Annular flange; 121. Notch; 13. Wire passing column; 20. Connector; 21. Through slot; 22. Retaining edge; 30. PIN needle; 31. Needle head; 32. Flat plate; 40. Bottom cover; 41. Arc surface; 51. First plug-in slot; 511. First vertical slot; 512. First horizontal slot; 52. Second plug-in slot; 521. Second vertical slot; 522. Second horizontal slot; 53. First plug-in column; 531. First vertical column; 532. First horizontal column; 54. Second plug-in column; 541. Second vertical column; 542. Second horizontal column. DETAILED DESCRIPTION

[0030] The inner direction described in the present invention refers to the direction close to the axis of the frame body, and the outer direction refers to the direction away from the axis of the frame body. Specifically, the inner and outer directions refer to Figure 5 The up and down directions at the middle connector.

[0031] like Figures 2 to 5 As shown, the stator skeleton for the rotary transformer provided by the utility model comprises a skeleton body 10, a connector 20, a PIN needle 30 and a bottom cover plate 40, wherein the skeleton body 10 is annular, the connector 20 is connected to the outer wall surface of the skeleton body 10 and extends horizontally outward, the PIN needle 30 comprises a needle head 31 and a flat plate portion 32 vertically connected to the needle head 31, the needle head 31 is inserted into the upper surface of the connector 20 and extends vertically upward, the flat plate portion 32 is buried in the connector 20, and a through groove 21 penetrating the connector 20 along the up and down direction is provided on the connector 20, the position of the through groove 21 corresponds to the flat plate portion 32, the flat plate portion 32 lies across the through groove 21, so that at least a portion of the upper and lower surfaces of the flat plate portion 32 are exposed from the upper and lower notches of the through groove 21, so as to perform ultrasonic welding, and the bottom cover plate 40 is detachably connected to the bottom of the connector 20, and when the bottom cover plate 40 is connected to the bottom of the connector 20, the bottom cover plate 40 blocks the lower notch of the through groove 21.

[0032] The advantage of this arrangement is that the bottom cover can be disassembled to facilitate ultrasonic welding at the flat portion of the PIN pin and seal the lower notch after welding, thereby avoiding short circuits and providing a certain degree of collision protection.

[0033] In this embodiment, the bottom cover plate 40 is detachably connected to the bottom of the connector 20 via a plug-in structure to facilitate disassembly. Specifically, the plug-in structure includes a plug-in slot provided on the connector 20 and a plug-in column provided on the bottom cover plate 40. The plug-in slot includes a first plug-in slot 51 provided on both side walls of the connector 20 and a second plug-in slot 52 provided on the outer end surface of the connector 20. The plug-in column includes a first plug-in column 53 corresponding to the first plug-in slot 51 and a second plug-in column 54 corresponding to the second plug-in slot 52.

[0034] Furthermore, the first plug-in slot 51 includes a first vertical slot 511 that passes through the bottom surface of the connector 20 in the vertical direction and a first horizontal slot 512 that is vertically connected to the upper end of the first vertical slot 511, the first horizontal slot 512 is located on the outer side of the first vertical slot 511 and extends horizontally outward, the first plug-in column 53 includes a first vertical column 531 corresponding to the first vertical slot 511 and a first horizontal column 532 corresponding to the first horizontal slot 512, the slot width of the first vertical slot 511 in the inner and outer directions is greater than or equal to the sum of the thickness of the first vertical column 531 in the inner and outer directions and the extension length of the first horizontal column 532, and the extension length of the first horizontal slot 512 is greater than or equal to the extension length of the first horizontal column 532.

[0035] The advantage of this arrangement is that the first horizontal column can slide in the first horizontal groove to align the first plug-in column with the first vertical groove, thereby facilitating the first plug-in column to be inserted into or out of the first vertical groove in the up and down direction, thereby facilitating the removal and installation of the bottom cover.

[0036] To avoid interference, further, the side wall of the bottom cover plate 40 facing the skeleton body 10 is an arc surface 41 , which is parallel to and spaced from the outer wall of the skeleton body 10 , and the width of the space is greater than or equal to the extension length of the first horizontal column 532 .

[0037] To ensure the firmness of the bottom cover plate 40 after installation, in the present embodiment, the second plug-in slot 52 includes a second vertical slot 521 penetrating the bottom surface of the connector 20 in the vertical direction and a second horizontal slot 522 vertically connected to the upper end of the second vertical slot 521, the second horizontal slot 522 is located on the inner side of the second vertical slot 521 and extends horizontally inward, the second plug-in column 54 includes a second vertical column 541 corresponding to the second vertical slot 521 and a second horizontal column 542 corresponding to the second horizontal slot 522, the slot width of the second vertical slot 521 in the inner and outer directions is equal to the thickness of the second vertical column 541 in the inner and outer directions, and the extension length of the second horizontal slot 522 is greater than or equal to the extension length of the second horizontal column 542.

[0038] Furthermore, there are a plurality of second plugging slots 52 , and the plurality of second plugging slots 52 are spaced apart along the width direction of the connector 20 , and the second plugging slots 52 are not connected to the through slots 21 .

[0039] Furthermore, when the bottom cover 40 is connected to the connector 20, the two side walls of the bottom cover 40 are flush with the two side walls of the connector 20, the outer end surface of the bottom cover 40 is flush with the outer end surface of the connector 20, and all the plug-in posts are located in the plug-in slots to improve practicality.

[0040] In this embodiment, the stator frame for the rotating transformer also includes a winding tooth 11 connected to the inner wall of the frame body 10, an annular flange 12 connected to the upper edge of the outer wall of the frame body 10, and a wire passing column 13 connected to the upper end surface of the frame body 10. A notch 121 corresponding to the connector 20 is provided on the annular flange 12, so that the upper end surface of the connector 20 is flush with the upper end surface of the frame body 10 and connected as a whole. The parts of the annular flange 12 located on both sides of the notch 121 extend outward along the outer contour of the connector 20, forming a rib 22 on the upper edge of the two side walls of the connector 20.

[0041] In this embodiment, there are a plurality of PIN pins 30 , and the plurality of PIN pins 30 are distributed at intervals along the width direction of the connector 20 .

[0042] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A stator frame for a rotary transformer, comprising: A skeleton body, wherein the skeleton body is in a ring shape; A connector, the connector being connected to an outer wall surface of the skeleton body and extending outward horizontally; A PIN needle, the PIN needle comprising a needle head and a flat plate portion vertically connected to the needle head, the needle head being inserted on the upper surface of the connector and extending vertically upward, and the flat plate portion being buried in the connector; Features: The connector is provided with a through groove penetrating the connector in the up-down direction, the position of the through groove corresponds to the flat plate portion, the flat plate portion lies transversely in the through groove, so that at least a part of the upper and lower surfaces of the flat plate portion are exposed from the upper and lower notches of the through groove; The stator frame for the rotary transformer also includes a bottom cover plate, which is detachably connected to the bottom of the connector. When the bottom cover plate is connected to the bottom of the connector, the bottom cover plate blocks the lower notch of the through slot.

2. The stator frame for a rotary transformer according to claim 1, characterized in that: The bottom cover plate is detachably connected to the bottom of the connector via a plug-in structure, the plug-in structure includes a plug-in slot provided on the connector and a plug-in column provided on the bottom cover plate, the plug-in slot includes a first plug-in slot provided on both side walls of the connector and a second plug-in slot provided on the outer end surface of the connector, the plug-in column includes a first plug-in column corresponding to the first plug-in slot and a second plug-in column corresponding to the second plug-in slot.

3. The stator frame for a rotary transformer according to claim 2, characterized in that: The first plug-in slot includes a first vertical slot that passes through the bottom surface of the connector in a vertical direction and a first horizontal slot that is vertically connected to the upper end of the first vertical slot, the first horizontal slot is located on the outer side of the first vertical slot and extends horizontally outward, the first plug-in column includes a first vertical column corresponding to the first vertical slot and a first horizontal column corresponding to the first horizontal slot, the slot width of the first vertical slot in the inner and outer directions is greater than or equal to the sum of the thickness of the first vertical column in the inner and outer directions and the extension length of the first horizontal column, and the extension length of the first horizontal slot is greater than or equal to the extension length of the first horizontal column.

4. The stator frame for a rotary transformer according to claim 3, characterized in that: The side wall of the bottom cover plate facing the frame body is an arc-shaped surface, and the arc-shaped surface is parallel to and spaced from the outer wall surface of the frame body, and the width of the space is greater than or equal to the extension length of the first horizontal column.

5. The stator frame for a rotary transformer according to claim 2, characterized in that: The second plug-in slot includes a second vertical slot running through the bottom surface of the connector in a vertical direction and a second horizontal slot vertically connected to the upper end of the second vertical slot, the second horizontal slot is located on the inner side of the second vertical slot and extends horizontally inward, the second plug-in column includes a second vertical column corresponding to the second vertical slot and a second horizontal column corresponding to the second horizontal slot, the slot width of the second vertical slot in the inner and outer directions is equal to the thickness of the second vertical column in the inner and outer directions, and the extension length of the second horizontal slot is greater than or equal to the extension length of the second horizontal column.

6. The stator frame for a rotary transformer according to claim 5, characterized in that: There are a plurality of the second plugging slots, and the plurality of the second plugging slots are distributed at intervals along the width direction of the connector, and the second plugging slots are not connected to the through slots.

7. The stator frame for a rotary transformer according to claim 2, characterized in that: When the bottom cover is connected to the connector, the two side walls of the bottom cover are flush with the two side walls of the connector, the outer end surface of the bottom cover is flush with the outer end surface of the connector, and all the plug-in posts are located in the plug-in slots.

8. The stator frame for a rotary transformer according to claim 1, characterized in that: The stator frame for the rotary transformer also includes winding teeth connected to the inner wall surface of the frame body, an annular flange connected to the upper edge of the outer wall surface of the frame body, and a wire passing column connected to the upper end surface of the frame body.

9. The stator frame for a rotary transformer according to claim 8, characterized in that: The annular flange is provided with a notch corresponding to the connector, so that the upper end surface of the connector is flush with the upper end surface of the skeleton body and connected as a whole. The parts of the annular flange located on both sides of the notch extend outward along the outer contour of the connector to form a rib on the upper edge of the two side walls of the connector.

10. The stator frame for a rotary transformer according to claim 1, characterized in that: There are a plurality of PIN pins, and the plurality of PIN pins are distributed at intervals along the width direction of the connector.

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