Rotary transformer

Abstract

The utility model discloses a rotary transformer. The rotary transformer comprises a stator core, an insulating part, a coil, a terminal block part, a terminal and a wire holding part, the stator iron core is provided with an annular main body part, a plurality of teeth which extend from the main body part along the radial direction and are arranged along the circumferential direction of the inner side of the main body part, and a plurality of mounting parts which are arranged along the circumferential direction of the outer side of the main body part; the insulating part covers the plurality of teeth; the coil is wound on each tooth through the insulating part; the terminal block part is arranged on the main body part of the stator core and connected with the insulating part, and the terminal block part is of a cubic structure; the terminal is arranged on the terminal block part and extends along the axial direction of the stator core, and the tail end of the winding of the coil is wound at one end of the terminal; one end, wound with the winding tail end of the coil, of the terminal is cylindrical, and the other end of the terminal is square and is provided with a wire through hole for arranging wires; the wire holding portion is provided on the terminal block portion, extends in the axial direction of the stator core, and accommodates the other end of the terminal, the other end of the terminal allowing a wire to be inserted and connected thereto.

Description

Technical Field

[0001] The utility model belongs to the technical field of voltage transformation, and in particular relates to a rotary transformer. Background Art

[0002] The rotary transformer currently on the market is a small AC motor used to measure angles. It is used to measure the angular displacement and angular velocity of the rotating shaft of a rotating object. It consists of a stator and a rotor. During the production of the rotary transformer, short circuit problems often occur during ultrasonic welding. This is a problem that will inevitably occur in ultrasonic welding, which greatly increases the risk of ultrasonic welding. Summary of the invention

[0003] The utility model aims to provide a rotary transformer to solve the problem that short circuit often occurs when the rotary transformer is made into ultrasonic welding in the prior art.

[0004] A rotary transformer of the utility model is realized as follows:

[0005] A rotary transformer, characterized in that it comprises:

[0006] A stator core, the stator core having an annular main body, a plurality of teeth extending radially from the main body and arranged circumferentially along the inner side of the main body, and a plurality of mounting portions extending radially from the main body and arranged circumferentially along the outer side of the main body;

[0007] an insulating portion, the insulating portion covering the plurality of teeth;

[0008] a coil, wherein a plurality of the coils are wound around each of the teeth via the insulating portion;

[0009] A terminal block, which is arranged on the main body of the stator core and connected to the insulating part, and has a square structure;

[0010] Terminals, a plurality of the terminals are arranged on the terminal platform and extend along the axial direction of the stator core, and the end of the winding of the coil is wound around one end of the terminal;

[0011] One end of the terminal wound around the winding end of the coil is cylindrical, and the other end is square and provided with a wire through hole for arranging wires;

[0012] The wire holding portion is provided on the terminal stage portion and extends in the axial direction of the stator core to accommodate the other ends of the plurality of terminals, and the other ends of the plurality of terminals are used for wire insertion and connection.

[0013] Furthermore, the plurality of teeth are evenly spaced apart.

[0014] Furthermore, the plurality of mounting portions is three, and the mounting portions are evenly spaced.

[0015] Furthermore, the mounting portion is provided with a mounting through hole and positioning grooves on both sides.

[0016] Furthermore, the insulating portion includes a first insulator and a second insulator, and the first insulator and the second insulator cover the plurality of teeth from both sides in the axial direction.

[0017] Furthermore, it also includes an insulating cover, which covers the insulating part and is snap-connected to the insulating part.

[0018] Furthermore, an upper terminal cover is provided on the insulating cover, and the upper terminal cover is snap-connected to the terminal platform.

[0019] Furthermore, the mounting portion is provided with a gasket along one side of the insulation cover.

[0020] Furthermore, the upper terminal cover and the insulating cover are an integrally formed structure.

[0021] Furthermore, it also includes a lower terminal cover, which is provided with a wire clamping groove, which corresponds one-to-one to the multiple terminals on the wire holding part to facilitate the insertion and connection of the wires, and the lower terminal cover is snap-connected to the terminal platform.

[0022] Furthermore, the insulating part utilizes insert molding technology to form an integrally molded insulating part, so that a certain number of teeth are buried inside.

[0023] Furthermore, the insulating portion, the terminal base portion and the wire holding portion are integrally formed using insert molding technology, so that the plurality of teeth and the plurality of terminals are buried inside.

[0024] After adopting the above technical solution, the utility model has the following beneficial effects:

[0025] 1. The utility model separates each terminal by setting a wire holding part, so that the copper wires will not be entangled during ultrasonic welding, solves the short circuit problem caused by line entanglement during welding, and improves the safety of the welding process.

[0026] 2. The utility model separates different circuits by arranging a wire groove on the lower terminal cover, thereby avoiding circuit entanglement caused by different lengths of circuits, greatly improving the qualified rate of resolver products and reducing scrapping costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the utility model.

[0028] Figure 2 It is a structural diagram of the utility model.

[0029] Figure 3 It is a structural explosion diagram of the utility model.

[0030] Figure 4 It is an exploded view of the insulating part structure of the utility model.

[0031] Figure 5 This is an integrated structural diagram of the utility model.

[0032] In the figure: 1. stator core, 11. main body, 12. teeth, 13. mounting portion, 131. mounting through hole, 132. positioning groove, 133. gasket, 2. insulating portion, 21. first insulator, 22. second insulator, 23. insulating cover, 24. upper terminal cover, 3. coil, 4. terminal platform, 5. terminal, 51. wire through hole, 6. wire holding portion, 7. lower terminal cover, 71. wire clamping groove. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the embodiments given in the accompanying drawings.

[0034] like Figure 1 As shown in the figure, the radial direction, axial direction and circumferential direction of the stator core 1 are specified. Here, the "radial direction" is a direction orthogonal to the rotation axis of the rotor rotating inside the stator core 1, the "axial direction" is a direction consistent with the axial direction of the rotation axis of the rotor, and the "circumferential direction" is a direction consistent with the rotation direction of the rotor.

[0035] like Figure 1-3 As shown, a rotary transformer includes: a stator core 1, an insulating portion 2, a plurality of coils 3, a terminal block portion 4, a plurality of terminals 5 and a wire holding portion 6.

[0036] The stator core 1 is composed of a plurality of stacked cores, which are produced by stamping steel plates such as electromagnetic steel plates. The stator core 1 has a main body 11, a plurality of teeth 12 and a mounting portion 13. The main body 11 is annular, and in this embodiment is an annular shape. The plurality of teeth 12 extend from the inner circumference of the main body 11 toward the center (i.e., radial direction) of the main body 11, and the plurality of teeth 12 are evenly spaced. The mounting portion 13 extends radially along the main body 11 and is arranged circumferentially along the outer side of the main body 11.

[0037] The insulating portion 2 is an insulating member, and is formed by, for example, injection molding of an insulating resin. Figure 4 As shown, the insulating portion 2 includes a first insulator 21 and a second insulator 22. The first insulator 21 and the second insulator 22 cover the plurality of teeth 12 from both sides in the axial direction.

[0038] A plurality of coils 3 are wound around each tooth 12 via an insulating portion 2 , and the coils 3 are composed of an excitation winding and an output winding.

[0039] The terminal block 4 is provided on the main body 11 of the stator core 1 and connected to the insulating portion 2 . The terminal block 4 has a square structure.

[0040] The terminal 5 is a conductive member such as metal. One end of the plurality of terminals 5 extends in an axially protruding manner from the terminal base portion 4, and the other end is accommodated in the wire holding portion 6. The end of the winding constituting the corresponding coil 3 is wound around one end of the terminal 5, and the other end of the terminal 5 is connected to the wire.

[0041] The wire holding portion 6 is provided on the terminal base portion 4 , extends axially from the main body portion 11 of the stator core 1 , and receives the other ends of the plurality of terminals 5 , into which wires are inserted for connection.

[0042] In this embodiment, in order to simplify the manufacturing process

[0043] The terminal block portion 4 and the wire holding portion 6 are an integrally formed structure.

[0044] One end of the terminal 5 wound around the winding end of the coil 3 is cylindrical, and the other end is square and is provided with a wire through hole 51 for arranging the wire, so that the wire can pass through and be welded to the terminal 5. The wire retaining portion 6 can avoid the possibility of line crossing and completely isolate the wires, solving the short circuit problem caused by line winding during ultrasonic welding and greatly improving the integrity of ultrasonic welding.

[0045] In order to facilitate installation and positioning, there can be three installation parts 13 that are evenly spaced. The installation part 13 is provided with an installation through hole 131 and positioning grooves 132 on both sides.

[0046] In this embodiment, in order to prevent foreign matter from falling into the plurality of teeth 12 , an insulating cover 23 is further included. The insulating cover 23 covers the insulating portion 2 and is snap-connected to the insulating portion 2 .

[0047] In this embodiment, in order to prevent foreign matter from falling into the terminal stage 4, an upper terminal cover 24 is provided on the insulating cover 23. The upper terminal cover 24 is snap-connected to the terminal stage 4, and the upper terminal cover 24 and the insulating cover 23 are an integrally formed structure.

[0048] In this embodiment, in order to facilitate installation and reduce wear during use, a gasket 133 is provided on one side of the installation portion 13 along the insulation cover 23 .

[0049] In this embodiment, a lower terminal cover 7 is also included. In order to facilitate the arrangement and insertion of wires, the lower terminal cover 7 is provided with a wire clamping groove 71. The wire clamping groove 71 corresponds one-to-one to the multiple terminals 5 on the wire holding portion 6. The lower terminal cover 7 is snap-connected to the terminal platform portion 4.

[0050] like Figure 3 As shown, in this embodiment, the insulating part 2 can also utilize insert molding technology to form an integrally molded insulating part 2 so that a certain number of teeth 12 are buried inside.

[0051] like Figure 5 As shown, in this embodiment, the insulating portion 2, the terminal base portion 4 and the wire holding portion 6 can also be integrally formed using insert molding technology, so that the plurality of teeth 12 and the plurality of terminals 5 are buried inside.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A rotary transformer, It is characterized in that include: A stator core (1), the stator core (1) comprising an annular main body (11), a plurality of teeth (12) extending radially from the main body (11) and arranged circumferentially along the inner side of the main body (11), and a plurality of mounting portions (13) extending radially from the main body (11) and arranged circumferentially along the outer side of the main body (11); An insulating portion (2), the insulating portion (2) covering the plurality of teeth (12); A coil (3), wherein a plurality of the coils (3) are wound around each of the teeth (12) via the insulating portion (2); A terminal block (4), the terminal block (4) being arranged on the main body (11) of the stator core (1) and connected to the insulating portion (2), the terminal block (4) being a cubic structure; Terminals (5), a plurality of the terminals (5) are arranged on the terminal platform (4) and extend along the axial direction of the stator core (1), and the end of the winding of the coil (3) is wound around one end of the terminal (5); One end of the terminal (5) wound around the winding end of the coil (3) is cylindrical, and the other end is square and provided with a wire through hole (51) for arranging wires; A wire holding portion (6) is provided on the terminal platform portion (4) and extends along the axial direction of the stator core (1) to accommodate the other ends of the plurality of terminals (5), and the other ends of the plurality of terminals (5) are provided for wire insertion and connection.

2. The rotary transformer according to claim 1, It is characterized in that The plurality of teeth (12) are evenly spaced apart.

3. The rotary transformer according to claim 1, It is characterized in that The plurality of mounting portions (13) is three in number, and the mounting portions (13) are evenly spaced.

4. The rotary transformer according to claim 1, It is characterized in that The mounting portion (13) is provided with a mounting through hole (131) and positioning grooves (132) on both sides.

5. The rotary transformer according to claim 1, It is characterized in that The insulating part (2) comprises a first insulator (21) and a second insulator (22), wherein the first insulator (21) and the second insulator (22) cover the plurality of teeth (12) from both sides in the axial direction.

6. The rotary transformer according to claim 1, It is characterized in that It also comprises an insulating cover (23), wherein the insulating cover (23) covers the insulating part (2), and the insulating cover (23) is snap-connected to the insulating part (2).

7. The rotary transformer according to claim 6, It is characterized in that An upper terminal cover (24) is provided on the insulating cover (23), and the upper terminal cover (24) is snap-connected to the terminal platform (4).

8. The rotary transformer according to claim 6, It is characterized in that The mounting portion (13) is provided with a gasket (133) along one side of the insulating cover (23).

9. The rotary transformer according to claim 7, It is characterized in that The upper terminal cover (24) and the insulating cover (23) are an integrally formed structure.

10. The rotary transformer according to claim 1, It is characterized in that It also includes a lower terminal cover (7), the lower terminal cover (7) is provided with a wire clamping groove (71), the wire clamping groove (71) corresponds one-to-one with the plurality of terminals (5) on the wire holding portion (6), and is convenient for wire insertion and connection, and the lower terminal cover (7) is snap-connected to the terminal platform portion (4).

11. The rotary transformer according to claim 1, It is characterized in that The insulating part (2) is formed into an integrally-molded insulating part (2) by using an insert molding technology, so that a certain number of teeth (12) are buried inside.

12. The rotary transformer according to claim 1, It is characterized in that The insulating portion (2), the terminal base portion (4) and the wire holding portion (6) are integrally formed using insert molding technology, so that the plurality of teeth (12) and the plurality of terminals (5) are buried inside.

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