Rotary transformer with higher connector root strength

Abstract

The rotary transformer with the higher connector root strength comprises a stator and a rotor, the stator comprises a stator framework, a stator iron core, a stator winding and a connector, the stator framework is in a hollow ring shape, the stator iron core is embedded in the stator framework, the connector is connected to the outer wall of the stator framework and extends outwards in the radial direction of the stator framework, and the connector is connected with the stator winding. The connector is plate-shaped and is positioned below the stator iron core; the rotor is rotatably arranged in the hollow cavity of the stator framework; the upper surface of the connector is provided with the reinforcing column extending upwards, the part, corresponding to the connector, of the stator core is provided with the through hole penetrating through the stator core in the vertical direction, and the reinforcing column is tightly squeezed in the through hole, so that a nail claw structure for enhancing the strength of the root of the connector can be formed; the nail claw structure can share force applied to the root of the connector, so that the phenomena of deformation, cracking and the like of the root of the connector are avoided, and hidden dangers are eliminated.

Description

Technical Field

[0001] This utility model relates to the field of rotary transformer technology, and specifically to a rotary transformer with higher strength at the connector root. Background Technology

[0002] A resolver / transformer is an electromagnetic sensor, also known as a synchrotron. It's 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. The stator windings, acting as the primary winding, receive the excitation voltage; the excitation frequency is typically 400, 3000, or 5000 Hz. The rotor windings, acting as the secondary winding, receive the induced voltage through electromagnetic coupling.

[0003] For a rotary transformer stator, it typically includes a stator frame, stator core, stator windings, and connectors. Generally, the stator frame is a hollow ring to house the rotor. The connectors are usually attached to the outer wall of the stator frame and extend outward along the radial direction of the stator frame, forming a cantilevered thin plate structure. After the connector is welded to the wire harness, a cover plate needs to be clipped to the end for shielding. To prevent the cover plate from loosening, the cover plate, stator frame, and connector are usually placed together on an ultrasonic welding machine for welding. During welding, the force of the welding head pressing on the connector is concentrated at the root of the connector, which can easily cause deformation and cracking at the root of the connector, creating potential hazards. Utility Model Content

[0004] The purpose of this invention is to overcome one or more shortcomings in the prior art and provide a rotary transformer with higher connector root strength.

[0005] To achieve the above objectives, the product in the technical solution adopted by this utility model is a rotary transformer with higher strength at the connector root, comprising:

[0006] The stator includes a stator frame, a stator core, a stator winding, and a connector. The stator frame is in the shape of a hollow ring. The stator core is embedded in the stator frame. The connector is connected to the outer wall of the stator frame and extends outward along the radial direction of the stator frame. The connector is in the shape of a plate and is located below the stator core.

[0007] The rotor is rotatably disposed within the hollow cavity of the stator frame;

[0008] The upper surface of the connector is provided with an upwardly extending reinforcing post, and the stator core is provided with a through hole in the vertical direction through the stator core at the corresponding part of the connector. The reinforcing post is squeezed into the through hole to form a claw structure that enhances the strength of the root of the connector.

[0009] Preferably, the reinforcing column, the connector, and the stator frame are integrally formed.

[0010] Preferably, there are multiple reinforcing columns that are spaced apart along the circumferential direction of the stator frame.

[0011] More preferably, the plurality of reinforcing columns are divided into at least two rows, and the two rows of reinforcing columns are spaced apart along the radial direction of the stator frame.

[0012] Preferably, the end face of the reinforcing column is flush with or lower than the end face of the stator core.

[0013] More preferably, when the end face of the reinforcing column is lower than the upper surface of the stator core, the height difference between the end face of the reinforcing column and the upper surface of the stator core is less than the thickness of a single silicon steel sheet in the stator core.

[0014] Preferably, the cross-section of the reinforcing column is any one of circular, elliptical, or rectangular.

[0015] Preferably, the reinforcing post is disposed near the end of the connector.

[0016] Preferably, a cover plate is fastened to the lower surface of the connector.

[0017] More preferably, the cover plate and the connector are joined together by ultrasonic welding.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] This utility model provides a rotary transformer with higher connector root strength, including a stator and a rotor. The stator includes a stator frame, a stator core, stator windings, and a connector. The stator frame is a hollow ring, and the stator core is embedded in the stator frame. The connector is connected to the outer wall of the stator frame and extends outward along the radial direction of the stator frame. The connector is plate-shaped and located below the stator core. The rotor is rotatably disposed in the hollow cavity of the stator frame. By providing an upwardly extending reinforcing post on the upper surface of the connector and opening a through hole in the stator core corresponding to the connector in the vertical direction, the reinforcing post is squeezed into the through hole, which can form a claw structure that enhances the strength of the connector root. During ultrasonic welding, this claw structure can share the force applied to the connector root, thereby avoiding deformation and cracking of the connector root and eliminating potential hazards. Attached Figure Description

[0020] Figure 1 This is a top view of Embodiment 1 of the present invention.

[0021] Figure 2 yes Figure 1 Cross-sectional view along the AA direction.

[0022] Figure 3 yes Figure 1 A three-dimensional schematic diagram.

[0023] Figure 4 yes Figure 3 A 3D schematic diagram with the stator core hidden.

[0024] Figure 5 yes Figure 4 A 3D schematic diagram with the cover plate removed.

[0025] Figure 6 This is embodiment two of the present invention. Figure 1 Cross-sectional view along the AA direction.

[0026] Among them: 10. Stator frame; 20. Stator core; 21. Through hole; 22. Silicon steel sheet; 30. Connector; 31. Reinforcing column; 40. Cover plate. Detailed Implementation

[0027] Example 1

[0028] like Figures 1 to 5 As shown, the rotary transformer with higher connector root strength provided by this utility model includes: a stator and a rotor (not shown in the figure). The stator includes a stator frame 10, a stator core 20, a stator winding (not shown in the figure), and a connector 30. The stator frame 10 is a hollow ring shape. The stator core 20 is embedded in the stator frame 10. The connector 30 is connected to the outer wall of the stator frame 10 and extends outward along the radial direction of the stator frame 10. The connector 30 is plate-shaped and located below the stator core 20. The rotor is rotatably disposed in the hollow cavity of the stator frame 10. The upper surface of the connector 30 is provided with an upwardly extending reinforcing post 31. The stator core 20 is provided with a through hole 21 that penetrates the stator core 20 in the vertical direction at the corresponding part of the connector 30. The reinforcing post 31 is squeezed into the through hole 21 to form a nail claw structure that enhances the root strength of the connector 30.

[0029] The advantage of this design is that during ultrasonic welding, the force applied to the root of the connector can be distributed through the claw structure, thereby avoiding deformation and cracking of the connector root and eliminating potential hazards.

[0030] In this embodiment, the reinforcing column, connector, and stator frame are integrally formed (injection molding). Specifically, before molding, the stator core with through holes is placed into the injection molding machine mold and then injection molded to integrally form the stator frame, connector, and reinforcing column, and the reinforcing column is squeezed into the through holes on the stator core.

[0031] To enhance the reinforcement effect of the nail claw structure, there are eight reinforcing columns 31, which are distributed at intervals along the circumferential direction of the stator frame 10. Specifically, these eight reinforcing columns 31 are divided into two rows, and these two rows of reinforcing columns 31 are arranged at intervals along the radial direction of the stator frame 10.

[0032] To further enhance the reinforcement effect of the nail claw structure, in this embodiment, the reinforcing post 31 is disposed near the end of the connector 30, that is, near the solder wire end.

[0033] In this embodiment, the end face (upper end face) of the reinforcing post 31 is flush with the end face of the stator core 20, and the cross-section of the reinforcing post 31 is circular. In other embodiments, the cross-section of the reinforcing post 31 may also be elliptical or rectangular. Furthermore, a cover plate 40 is fastened to the lower surface of the connector 30, and the cover plate 40 and the connector 30 are connected together by ultrasonic welding.

[0034] Example 2

[0035] like Figure 6 As shown, Embodiment 2 is basically the same as Embodiment 1, except that in Embodiment 2, the end face (upper end face) of the reinforcing column 31 is lower than the upper surface of the stator core 20, and the height difference between the end face of the reinforcing column 31 and the upper surface of the stator core 20 is less than the thickness of the single silicon steel sheet 22 in the stator core 20.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A rotary transformer with higher connector root strength, comprising: The stator includes a stator frame, a stator core, a stator winding, and a connector. The stator frame is in the shape of a hollow ring. The stator core is embedded in the stator frame. The connector is connected to the outer wall of the stator frame and extends outward along the radial direction of the stator frame. The connector is in the shape of a plate and is located below the stator core. The rotor is rotatably disposed within the hollow cavity of the stator frame; Its features are: The upper surface of the connector is provided with an upwardly extending reinforcing post, and the stator core is provided with a through hole in the vertical direction through the stator core at the corresponding part of the connector. The reinforcing post is squeezed into the through hole to form a claw structure that enhances the strength of the root of the connector.

2. The rotary transformer with higher connector root strength according to claim 1, characterized in that: The reinforcing column, the connector, and the stator frame are integrally formed.

3. The rotary transformer with higher connector root strength according to claim 1, characterized in that: The reinforcing columns are multiple and spaced apart along the circumferential direction of the stator frame.

4. The rotary transformer with higher connector root strength according to claim 3, characterized in that: The plurality of reinforcing columns are divided into at least two rows, and the two rows of reinforcing columns are spaced apart along the radial direction of the stator frame.

5. The rotary transformer with higher connector root strength according to claim 1, characterized in that: The end face of the reinforcing column is flush with or lower than the end face of the stator core.

6. The rotary transformer with higher connector root strength according to claim 5, characterized in that: When the end face of the reinforcing column is lower than the upper surface of the stator core, the height difference between the end face of the reinforcing column and the upper surface of the stator core is less than the thickness of a single silicon steel sheet in the stator core.

7. The rotary transformer with higher connector root strength according to claim 1, characterized in that: The cross-section of the reinforcing column can be any one of circular, elliptical, or rectangular.

8. The rotary transformer with higher connector root strength according to claim 1, characterized in that: The reinforcing post is positioned near the end of the connector.

9. The rotary transformer with higher connector root strength according to claim 1, characterized in that: A cover plate is fastened to the lower surface of the connector.

10. The rotary transformer with higher connector root strength according to claim 9, characterized in that: The cover plate and the connector are joined together by ultrasonic welding.

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