Rotary transformer

Abstract

The utility model discloses a rotary transformer, and relates to the technical field of angle measurement. The first stator is fixedly sleeved in the first shell; the first rotor is rotationally sleeved in the first shell, and the first rotor is positioned in the first stator; the second shell is rotationally locked and connected with the first shell; the second stator is fixedly sleeved in the second shell; and the second rotor is rotationally sleeved in the second shell, is fixedly connected with the first rotor and is positioned in the second stator. The technical effect of the utility model lies in that the complexity of zero adjustment is low.

Description

Technical Field

[0001] The utility model relates to the technical field of angle measurement, in particular to a rotary transformer. Background Art

[0002] A resolver is a device used to measure the angular displacement and angular velocity of a rotating object's shaft, and is mainly composed of a stator and a rotor.

[0003] In order to increase the measurement reliability, the relevant rotating transformer is generally set with dual channels. However, when adjusting, the relevant rotating transformer needs to be disassembled as a whole, and the two zero positions of the dual channels must be consistent by adjusting the rotor, which easily leads to high complexity of the zero position adjustment. Utility Model Content

[0004] In view of the above technical problems, the utility model provides a rotary transformer, the complexity of its zero position adjustment is low.

[0005] In order to solve the above problems, the technical solution provided by the utility model is:

[0006] A rotary transformer, comprising:

[0007] first shell;

[0008] A first stator fixedly sleeved in the first housing;

[0009] A first rotor rotatably sleeved in the first housing, wherein the first rotor is located in the first stator;

[0010] A second housing rotatably locked with the first housing;

[0011] A second stator fixedly sleeved in the second housing;

[0012] A second rotor is rotatably sleeved in the second housing, the second rotor is fixedly connected to the first rotor, and the second rotor is located in the second stator.

[0013] Optionally, also include:

[0014] A first connecting ear connected to the outside of the first housing;

[0015] A second connecting ear connected to the outside of the second housing;

[0016] A fastener connected to both the first connecting ear and the second connecting ear.

[0017] Optionally, also include:

[0018] a threaded hole provided on the first connecting ear;

[0019] A waist-shaped hole is provided on the second connecting ear, wherein the waist-shaped hole is connected to the threaded hole;

[0020] Wherein, the fastener, the threaded hole and the waist-shaped hole are all connected.

[0021] Optionally, the number of the first connecting ears is equal to the number of the second connecting ears, and both are multiple.

[0022] Optionally, the plurality of first connecting ears are evenly distributed along the circumference of the first shell, and the plurality of second connecting ears are evenly distributed along the circumference of the second shell.

[0023] Optionally, it also includes a rotating shaft, one end of which is rotatably sleeved in the first shell, and the other end of which is rotatably sleeved in the second shell, the first rotor is fixedly sleeved outside one end of the rotating shaft, and the second rotor is fixedly sleeved outside the other end of the rotating shaft.

[0024] Optionally, also include:

[0025] A first sleeve fixedly sleeved on one end of the rotating shaft, one end of the first sleeve rotatably sleeved in the first housing, and the other end of the first sleeve in contact with one end of the first rotor;

[0026] A second sleeve fixedly sleeved on the other end of the rotating shaft, one end of the second sleeve rotatably sleeved in the second housing, and the other end of the second sleeve in contact with one end of the second rotor;

[0027] A shaft shoulder is fixedly sleeved on the outside of the rotating shaft, and the shaft shoulder contacts between the other end of the first rotor and the other end of the second rotor.

[0028] Optionally, one end of the first sleeve is rotatably sleeved in the first shell via a first bearing, and one end of the second sleeve is rotatably sleeved in the second shell via a second bearing.

[0029] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects: when adjusting the zero position, first loosen the first housing and the second housing, slightly rotate the first housing or the second housing, thereby driving the first stator or the second stator to rotate, so that the two zero positions of the first channel and the second channel are consistent, without disassembling the entire rotary transformer, so that the complexity of the zero position adjustment is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of a rotary transformer proposed in an embodiment of the utility model;

[0031] Figure 2A cross-sectional view of a rotary transformer proposed in an embodiment of the utility model;

[0032] In the figure: 11, first housing; 12, first stator; 13, first rotor; 14, first connecting ear; 141, threaded hole; 21, second housing; 22, second stator; 23, second rotor; 24, second connecting ear; 241, waist-shaped hole; 3, fastener; 4, rotating shaft; 41, shaft shoulder; 51, first bushing; 52, second bushing; 61, first bearing; 62, second bearing. DETAILED DESCRIPTION

[0033] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

[0034] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings. The words "first", "second", etc. described in the present utility model are set for the convenience of describing the technical solution of the present utility model, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments in the present application can be combined with each other. In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be 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 be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not have contradictions or conflicts, all of which are within the scope of protection required by the present utility model.

[0035] Example 1

[0036] Combined with Figure 1-2 , this embodiment provides a rotary transformer, including:

[0037] A first housing 11;

[0038] A first stator 12 fixedly sleeved in the first housing 11;

[0039] The first rotor 13 is rotatably sleeved in the first housing 11, and the first rotor 13 is located in the first stator 12;

[0040] A second housing 21 rotatably and tightly connected to the first housing 11;

[0041] A second stator 22 fixedly sleeved in the second housing 21;

[0042] The second rotor 23 is rotatably sleeved in the second housing 21 . The second rotor 23 is fixedly connected to the first rotor 13 . The second rotor 23 is located in the second stator 22 .

[0043] Specifically, the first housing 11, the first stator 12 and the first rotor 13 are used to form a first channel of the rotary transformer, and the second housing 21, the second stator 22 and the second rotor 23 are used to form a second channel of the rotary transformer;

[0044] During measurement, the rotating object to be measured synchronously drives the first rotor 13 and the second rotor 23 to rotate, so that the first rotor 13 and the first stator 12 are electromagnetically coupled, so that the first stator 12 generates a first induced voltage, and the first stator 12 transmits the first induced voltage to the terminal, and then the first angle value is obtained through calculation by the terminal. At the same time, the second rotor 23 and the second stator 22 are electromagnetically coupled, so that the second stator 22 generates a second induced voltage, and the second stator 22 transmits the second induced voltage to the terminal, and then the second angle value is obtained through calculation by the terminal. By comparing the first angle value and the second angle value, the measurement reliability of the rotary transformer is ensured.

[0045] When adjusting the zero position, first loosen the first housing 11 and the second housing 21, and slightly rotate the first housing 11 or the second housing 21, thereby driving the first stator 12 or the second stator 22 to rotate, so that the two zero positions of the first channel and the second channel are consistent, without disassembling the entire rotary transformer, so that the complexity of the zero position adjustment is reduced.

[0046] Further, such as Figure 1 , also includes:

[0047] A first connecting ear 14 connected to the outside of the first housing 11;

[0048] A second connecting ear 24 connected to the outside of the second housing 21;

[0049] The fastener 3 is connected to both the first connecting ear 14 and the second connecting ear 24 .

[0050] Specifically, the first connecting ear 14, the second connecting ear 24 and the fastener 3 facilitate the rotational locking connection between the first shell 11 and the second shell 21. The first fastener 3 can be a countersunk screw, a semi-countersunk screw, etc.

[0051] Further, such as Figure 1 , also includes:

[0052] A threaded hole 141 provided on the first connecting ear 14;

[0053] A waist-shaped hole 241 is provided on the second connecting ear 24, and the waist-shaped hole 241 is connected to the threaded hole 141;

[0054] The fastener 3 is connected to the threaded hole 141 and the waist-shaped hole 241 .

[0055] Specifically, the threaded hole 141 and the fastener 3 are threadedly connected to facilitate locking; even if the first shell 11 and the second shell 21 rotate slightly relative to each other, the waist-shaped hole 241 and the threaded hole 141 can always be connected, so that the fastener 3 can always be connected to both the threaded hole 141 and the waist-shaped hole 241.

[0056] Further, such as Figure 1 The number of the first connecting ears 14 and the number of the second connecting ears 24 are equal, and both are multiple.

[0057] Specifically, the plurality of first connecting ears 14 and the plurality of second connecting ears 24 facilitate multi-point connection between the first housing 11 and the second housing 21 , and the connection is firm.

[0058] Further, such as Figure 1 The first connecting ears 14 are evenly distributed along the circumference of the first shell 11 , and the second connecting ears 24 are evenly distributed along the circumference of the second shell 21 .

[0059] Specifically, the circumferential uniform distribution facilitates increasing the force uniformity of the first shell 11 and the second shell 21 .

[0060] Further, such as Figure 2 , and also includes a rotating shaft 4, one end of the rotating shaft 4 is rotatably sleeved in the first shell 11, the other end of the rotating shaft 4 is rotatably sleeved in the second shell 21, the first rotor 13 is fixedly sleeved outside one end of the rotating shaft 4, and the second rotor 23 is fixedly sleeved outside the other end of the rotating shaft 4.

[0061] Specifically, the rotating shaft 4 is used to be connected to the rotating object to be measured, so that the rotating object to be measured can synchronously drive the first rotor 13 and the second rotor 23 to rotate through the rotating shaft 4 .

[0062] Further, such as Figure 2 , also includes:

[0063] A first sleeve 51 is fixedly sleeved on one end of the rotating shaft 4, one end of the first sleeve 51 is rotatably sleeved in the first housing 11, and the other end of the first sleeve 51 contacts one end of the first rotor 13;

[0064] A second sleeve 52 is fixedly sleeved on the other end of the rotating shaft 4, one end of the second sleeve 52 is rotatably sleeved in the second housing 21, and the other end of the second sleeve 52 contacts one end of the second rotor 23;

[0065] A shaft shoulder 41 is fixedly sleeved on the outside of the rotating shaft 4 , and the shaft shoulder 41 contacts between the other end of the first rotor 13 and the other end of the second rotor 23 .

[0066] Specifically, the first shaft sleeve 51 , the second shaft sleeve 52 and the shaft shoulder 41 are used to jointly produce an axial limiting effect on the first rotor 13 and the second rotor 23 .

[0067] Further, such as Figure 2 One end of the first sleeve 51 is rotatably sleeved in the first housing 11 through a first bearing 61 , and one end of the second sleeve 52 is rotatably sleeved in the second housing 21 through a second bearing 62 .

[0068] Specifically, the first bearing 61 and the second bearing 62 may both be deep groove ball bearings or the like.

[0069] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A rotary transformer, characterized in that: include: first shell; A first stator fixedly sleeved in the first housing; A first rotor rotatably sleeved in the first housing, wherein the first rotor is located in the first stator; A second housing rotatably locked with the first housing; A second stator fixedly sleeved in the second housing; A second rotor is rotatably sleeved in the second housing, the second rotor is fixedly connected to the first rotor, and the second rotor is located in the second stator.

2. A rotary transformer according to claim 1, characterized in that: Also includes: A first connecting ear connected to the outside of the first housing; A second connecting ear connected to the outside of the second housing; A fastener connected to both the first connecting ear and the second connecting ear.

3. A rotary transformer according to claim 2, characterized in that: Also includes: a threaded hole provided on the first connecting ear; A waist-shaped hole is provided on the second connecting ear, wherein the waist-shaped hole is connected to the threaded hole; Wherein, the fastener, the threaded hole and the waist-shaped hole are all connected.

4. A rotary transformer according to claim 2, characterized in that: The number of the first connecting ears is equal to the number of the second connecting ears, and both are multiple.

5. A rotary transformer according to claim 4, characterized in that: The plurality of first connecting ears are evenly distributed along the circumference of the first shell, and the plurality of second connecting ears are evenly distributed along the circumference of the second shell.

6. A rotary transformer according to any one of claims 1 to 5, characterized in that: It also includes a rotating shaft, one end of which is rotatably sleeved in the first shell, and the other end of which is rotatably sleeved in the second shell, the first rotor is fixedly sleeved outside one end of the rotating shaft, and the second rotor is fixedly sleeved outside the other end of the rotating shaft.

7. A rotary transformer according to claim 6, characterized in that: Also includes: A first sleeve fixedly sleeved on one end of the rotating shaft, one end of the first sleeve rotatably sleeved in the first housing, and the other end of the first sleeve in contact with one end of the first rotor; A second sleeve fixedly sleeved on the other end of the rotating shaft, one end of the second sleeve rotatably sleeved in the second housing, and the other end of the second sleeve in contact with one end of the second rotor; A shaft shoulder is fixedly sleeved on the outside of the rotating shaft, and the shaft shoulder contacts between the other end of the first rotor and the other end of the second rotor.

8. A rotary transformer according to claim 7, characterized in that: One end of the first sleeve is rotatably sleeved in the first housing via a first bearing, and one end of the second sleeve is rotatably sleeved in the second housing via a second bearing.

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