A resolver test fixture

Abstract

The utility model discloses a kind of rotary transformer test tooling including mounting seat, reference mounting plate and stator mounting plate, mounting seat is provided with containing hole;Reference mounting plate is rotatably set in containing hole, the center sleeve of reference mounting plate is rotatable test main shaft, test main shaft is coaxially arranged with rotor, test main shaft can be moved along axial direction, drive rotor moves along axial direction, to adjust the vertical relative position between stator and rotor;Stator mounting plate is sleeved on the outside of stator, stator mounting plate is coaxially arranged with stator, stator mounting plate can be moved along radial direction, to adjust the coaxiality between stator and rotor.This test tooling drives rotor to move along axial direction by test main shaft, adjusts the vertical relative position between stator and rotor.Stator mounting plate can be moved along radial direction simultaneously, the coaxiality between stator and rotor can be effectively adjusted.

Description

Technical Field

[0001] This utility model relates to the field of rotary transformer technology, and in particular to a rotary transformer testing fixture. Background Technology

[0002] A rotary transformer is an electromagnetic sensor, also known as a synchrotron. 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. The stator windings, acting as the primary winding, receive the excitation voltage. The rotor windings, acting as the secondary winding, receive the induced voltage through electromagnetic coupling.

[0003] Based on its operating principle, a rotary transformer can serve as a precision angle, position, and speed detection device, suitable for all applications using rotary encoders, especially in situations where rotary encoders cannot function properly, such as high temperature, extreme cold, humidity, high speed, and high vibration. Due to these characteristics, the rotary transformer can completely replace photoelectric encoders and is widely used in angle and position detection systems in servo control systems, robotic systems, aerospace, and radar. Because of its high precision, reliability, and anti-interference capabilities, the rotary transformer is widely used in the rotating mechanisms of large radar systems for precise angle, position, and speed detection.

[0004] The high precision of a rotary transformer stems not only from its inherent output accuracy but also, importantly, from the installation precision of its stator and rotor. During testing, the vertical relative position (axial displacement) and coaxiality between the rotor and stator significantly impact the accuracy. However, controlling the installation precision of the stator and rotor in a rotary transformer is extremely difficult. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a rotary transformer testing fixture capable of adjusting the stator / rotor of the rotary transformer to different installation accuracies, in order to test the relationship between the output accuracy of the rotary transformer under different installation accuracies.

[0006] According to an embodiment of the present invention, a rotary transformer testing fixture is provided, wherein the rotary transformer includes a stator and a rotor, and the rotary transformer testing fixture includes: Mounting base, wherein the mounting base is provided with a receiving hole; A reference mounting plate is rotatably disposed in the receiving hole. The upper end face of the reference mounting plate is flush with the upper end face of the mounting base. A rotatable test spindle is sleeved at the center of the reference mounting plate. The rotor is sleeved on the outside of the test spindle. The test spindle and the rotor are fixedly connected and coaxially arranged. The test spindle can move along the axial direction, driving the rotor to move along the axial direction to adjust the vertical relative position between the stator and the rotor. A stator mounting plate is adjustablely positioned on the mounting base, the stator mounting plate is sleeved on the outside of the stator, the stator mounting plate is coaxially arranged with the stator, and the stator mounting plate can move radially to adjust the coaxiality between the stator and the rotor.

[0007] The rotary transformer testing fixture according to the embodiments of this utility model has at least the following beneficial effects: This testing fixture uses a rotatable reference mounting plate, the upper surface of which is flush with the upper surface of the mounting base, and a rotatable test spindle that can move along the axial direction is fitted at its center. The rotor is fitted outside the test spindle and fixed coaxially with it. In this way, the test spindle drives the rotor to move along the axial direction, thus precisely adjusting the vertical relative position between the stator and the rotor. Simultaneously, an adjustable stator mounting plate is fitted outside the stator and coaxial with it. The stator mounting plate can move radially, effectively adjusting the coaxiality between the stator and the rotor, thereby obtaining different installation accuracies. Furthermore, based on different installation accuracies, the output accuracy of the rotary transformer under different installation accuracies can be tested and determined.

[0008] According to some embodiments of this utility model, the reference mounting plate is provided with two reference holes, which are centrally symmetrically distributed with the axis of the test spindle as the center of symmetry. The stator mounting plate is provided with several pairs of positioning holes, the line connecting each pair of positioning holes passes through the axis of the test spindle, the distance between the two reference holes is equal to the distance between each pair of positioning holes, the midpoint between each pair of positioning holes is offset from the axis of the test spindle, and the reference holes and the positioning holes are connected by positioning pins.

[0009] According to some embodiments of this utility model, the distance between the midpoint between the positioning holes and the axis of the test spindle is greater than or equal to 0.

[0010] According to some embodiments of the present invention, the stator mounting plate and the reference mounting plate are detachably connected.

[0011] According to some embodiments of the present invention, the stator mounting plate is fixedly connected to the mounting base by connecting screws, the diameter of the mounting hole on the stator mounting plate is larger than the mounting hole on the mounting base, and the connecting screws are disposed on the mounting holes of the stator mounting plate and the mounting base.

[0012] According to some embodiments of this utility model, the test spindle and the rotor are detachably connected.

[0013] According to some embodiments of the present invention, a limiting screw is provided at the lower end of the reference mounting plate in the radial direction, the reference mounting plate is connected to the test spindle through the limiting screw, and the inner end of the limiting screw is located in the annular groove provided in the circumferential direction of the test spindle.

[0014] According to some embodiments of the present invention, the test spindle is driven to rotate by a drive motor, the drive motor is mounted below the mounting base via a motor mounting bracket, the test spindle is connected to the output shaft of the drive motor via an adjusting connector, and the position of the test spindle relative to the output shaft of the drive motor is adjustable.

[0015] According to some embodiments of the present invention, the adjusting connector is rotatably snapped into the test spindle, and one end of the adjusting connector is threadedly connected to the output shaft of the drive motor.

[0016] According to some embodiments of the present invention, a limiting shim is provided in the test spindle, the limiting shim is detachably connected to the interior of the test spindle, and the adjusting connector is rotatably inserted into the limiting hole of the limiting shim.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the rotary transformer testing fixture according to an embodiment of the present invention; Figure 2 for Figure 1 The diagram shown is an exploded view of the rotary transformer testing fixture. Figure 3 for Figure 1 The diagram shows a half-section of the rotary transformer testing fixture.

[0019] Icon labels: Stator 1; Rotor 2; Mounting base 10; receiving hole 11; motor mounting bracket 12; Reference mounting plate 20; test spindle 21; annular groove 211; reference hole 22; limit screw 23; Stator mounting plate 30; positioning hole 31; connecting screw 32; positioning pin 33; Drive motor 40; Adjustable connector 41; Limiting shim 42. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] Reference Figures 1 to 3 According to an embodiment of the present invention, the rotary transformer test fixture includes a stator 1 and a rotor 2, and the rotary transformer test fixture includes a mounting base 10, a reference mounting plate 20 and a stator mounting plate 30. Mounting base 10 is provided with receiving hole 11; reference mounting plate 20 is rotatably disposed in receiving hole 11, the upper end surface of reference mounting plate 20 is flush with the upper end surface of mounting base 10, a rotatable test spindle 21 is sleeved at the center of reference mounting plate 20, rotor 2 is sleeved on the outside of test spindle 21, test spindle 21 and rotor 2 are fixedly connected, test spindle 21 and rotor 2 are coaxially disposed, test spindle 21 can move along the axial direction, driving rotor 2 to move along the axial direction, so as to adjust the vertical relative position between stator 1 and rotor 2; stator mounting plate 30 is adjustablely disposed on mounting base 10, stator mounting plate 30 is sleeved on the outside of stator 1, stator mounting plate 30 is coaxially disposed with stator 1, stator mounting plate 30 can move in the radial direction, so as to adjust the coaxiality between stator 1 and rotor 2.

[0024] Specifically, this rotary transformer testing fixture mainly consists of three parts: a mounting base 10, a reference mounting plate 20, and a stator mounting plate 30. The mounting base 10, as the basic support component of the entire fixture, is made of high-strength, high-stability metal materials, such as stainless steel, to ensure it can withstand various external forces without deformation during testing. The mounting base 10 is provided with a receiving hole 11, the size and shape of which are precisely designed according to the specifications of the reference mounting plate 20, ensuring that the reference mounting plate 20 can be smoothly installed and rotate stably within it. It is rotatably set in the receiving hole 11 of the mounting base 10, achieving smooth and flexible rotation. The upper end face of the reference mounting plate 20 is finely machined and flush with the upper end face of the mounting base 10 to ensure the consistency of the axial reference between the reference mounting plate 20 and the stator mounting plate 30 during testing. A rotatable test spindle 21 is fitted at the center of the reference mounting plate 20. The test spindle 21 and the reference mounting plate 20 ensure smooth rotation of the test spindle 21 while also withstanding certain axial and radial loads. The rotor 2 is fitted onto the outside of the test spindle 21 and can be fixedly connected to the test spindle 21 by means of screw connection, key connection, or interference fit, ensuring that the two move synchronously and are coaxially arranged during rotation. The test spindle 21 can move along the axial direction, thereby driving the rotor 2 to move along the axial direction, and thus adjusting the vertical relative position (i.e., the axial displacement between the two) between the stator 1 and the rotor 2. The stator mounting plate 30 is adjustablely arranged on the mounting base 10, specifically by moving radially on the mounting base 10. The stator mounting plate 30 is fitted onto the outside of the stator 1 and is coaxially arranged with the stator 1, thereby adjusting the coaxiality between the stator 1 and the rotor 2.

[0025] When testing the rotary transformer, the coaxiality of the stator 1 and rotor 2 is first adjusted. Specifically, the reference mounting plate 20 is first placed in the receiving hole 11, so that the upper end face of the reference mounting plate 20 is flush with the upper end face of the mounting base 10. Then, the test spindle 21 and rotor 2 are passed through the reference mounting plate 20. Next, the stator 1 is sleeved on the outside of the rotor 2 through the stator mounting plate 30 and mounted on the mounting base 10. Then, by adjusting the radial position of the stator mounting plate 30 on the mounting base 10, the stator mounting plate 30 drives the stator 1 to move radially relative to the rotor 2, thereby causing radial displacement between the stator 1 and rotor 2, and thus adjusting the coaxiality between the rotor 2 and stator 1. Different distances of movement of the stator mounting plate 30 result in different coaxialities between the stator 1 and rotor 2. After adjusting the coaxiality between stator 1 and rotor 2, the axial positional relationship between them can be adjusted. This can be done by adjusting the axial position of the test spindle 21, which will move rotor 2 axially, thus adjusting the vertical relative position between stator 1 and rotor 2. Once the coaxiality and axial displacement between stator 1 and rotor 2 are adjusted, the installation accuracy of stator 1 and rotor 2 is complete. Finally, an excitation voltage is applied to the stator 1 winding, and the rotor 2 winding generates an induced voltage through electromagnetic coupling. The induced voltage is measured and analyzed using testing instruments to obtain data such as the angle, position, and speed of the rotary transformer, evaluating whether the performance indicators of the rotary transformer under this installation accuracy meet the design requirements. By quickly adjusting different installation accuracies between stator 1 and rotor 2, the performance indicators of the rotary transformer under these accuracies can be quickly evaluated to determine if they meet the design requirements. This allows for the determination of the output accuracy pattern of the rotary transformer under different installation accuracies, leading to further research into corresponding compensation schemes. Ultimately, this solves the measurement accuracy problem caused by the installation accuracy, i.e., exploring the corresponding compensation scheme based on the output accuracy pattern. Therefore, it is understandable that in the field of radar technology, using the rotary transformer test fixture of this embodiment to evaluate installation accuracy can reduce radar downtime for maintenance and improve the monitoring accuracy of radar rotation angle and rate, while reducing the burden of radar production processes, production costs and quality control.

[0026] Therefore, it is understood that the rotary transformer testing fixture according to this utility model embodiment has at least the following beneficial effects: This testing fixture uses a rotatable reference mounting plate 20, whose upper surface is flush with the upper surface of the mounting base 10, and a rotatable test spindle 21 that can move along the axial direction is fitted at its center. The rotor 2 is fitted outside the test spindle 21 and fixed coaxially with it. In this way, the test spindle 21 drives the rotor 2 to move along the axial direction, thus accurately adjusting the vertical relative position between the stator 1 and the rotor 2. Simultaneously, an adjustable stator mounting plate 30 is fitted outside the stator 1 and coaxial with it. The stator mounting plate 30 can move radially, effectively adjusting the coaxiality between the stator 1 and the rotor 2, thereby obtaining different installation accuracies. Furthermore, the output accuracy of the rotary transformer under different installation accuracies can be tested based on these accuracies. In addition, the rotary transformer testing fixture of this embodiment has a reasonable structure and is easy to operate. The arrangement and adjustment mechanism of the reference mounting plate 20 and stator mounting plate 30 allow operators to easily and quickly adjust the positions of the stator 1 and rotor 2 during testing, without requiring complex operating procedures or specialized skills. This improves testing efficiency and reduces testing costs. Furthermore, this tooling design has good versatility, applicable to testing rotary transformers of different specifications and models, further expanding its application scope and providing strong technical support for the production and testing of rotary transformers.

[0027] Reference Figures 1 to 3 In some embodiments of this utility model, the reference mounting plate 20 is provided with two reference holes 22. The two reference holes 22 are centrally symmetrically distributed with the axis of the test spindle 21 as the center of symmetry. The stator mounting plate 30 is provided with several pairs of positioning holes 31. The line connecting each pair of positioning holes 31 passes through the axis of the test spindle 21. The distance between the two reference holes 22 is equal to the distance between each pair of positioning holes 31. The midpoint between each pair of positioning holes 31 is offset from the axis of the test spindle 21. The reference holes 22 and the positioning holes 31 are connected by positioning pins 33.

[0028] Specifically, the reference mounting plate 20 has two reference holes 22, which are centrally symmetrically distributed with the axis of the test spindle 21 as the center of symmetry. Therefore, the distances from the two reference holes 22 to the axis are equal. The stator mounting plate 30 is also designed with several pairs of positioning holes 31. The line connecting each pair of positioning holes 31 passes through the axis of the test spindle 21, and the distance between the two reference holes 22 is equal to the distance between each pair of positioning holes 31, so that the two positioning holes 31 can be set in a one-to-one correspondence with the two reference holes 22. However, it is worth noting that when the stator mounting plate 30 is not radially displaced, the midpoint between each pair of positioning holes 31 is offset from the axis of the test spindle 21. Therefore, since the midpoint between each pair of positioning holes 31 is offset from the axis of the test spindle 21, and since the distance between the two positioning holes 31 is equal to the distance between the two reference holes 22, when the positioning holes 31 and the reference holes 22 are connected by the positioning pins 33 respectively, the midpoint between the positioning holes 31 moves towards the axis between the reference holes 22, and the midpoint between the positioning holes 31 coincides with the axis between the reference holes 22. This causes the stator mounting plate 30 to move radially on the mounting base 10, thereby causing the stator 1 to follow the stator mounting plate 30 in radial movement, ultimately causing an offset in the coaxiality between the stator 1 and the rotor 2. It should be noted that the stator mounting plate 30 can be provided with several sets of positioning holes 31, such as one set, two sets, or even more. Multiple pairs of positioning holes 31 provide greater flexibility for fine-tuning multiple coaxiality adjustments between the stator 1 and the rotor 2.

[0029] For example, in some specific rotary transformer testing scenarios, the stator mounting plate 30 is provided with 16 pairs of positioning holes 31. Of course, any number of positioning holes 31 can be set. Each pair of positioning holes 31 represents a different "coaxiality assembly precision," meaning the offset between the center of each pair of positioning holes 31 and the axis of the reference hole 22. Different "coaxiality assembly precisions" can be greater than or equal to zero, meaning the offset between the center of each pair of positioning holes 31 and the axis of the reference hole 22 can be greater than or equal to zero. For instance, one pair of positioning holes 31 can be set to be concentric with the reference mounting plate 20, meaning the offset between the midpoint of the positioning holes 31 and the axis of the test spindle 21 is zero, i.e., the coaxiality deviation between the stator 1 and the rotor 2 is zero. In this case, by using positioning pins 33 installed on the first pair of holes in the stator mounting plate 30 and the two reference holes 22 in the reference mounting plate 20, the coaxiality assembly precision setting of the stator 1 and the rotor 2 can be achieved, i.e., the coaxiality deviation between the stator 1 and the rotor 2 is set to be zero.

[0030] In the other 15 pairs of positioning holes 31, the center of each pair of positioning holes 31 is offset from the axis of the reference hole 22, and the line connecting the centers of the two positioning holes 31 passes through the axis of the reference mounting plate 20. It should be noted that the distance between the midpoint of the line connecting the two positioning holes 31 and the axis of the reference mounting plate 20 is the set coaxiality deviation value. When positioning pins 33 are installed on the 15 pairs of positioning holes 31 of the stator mounting plate 30 and the reference hole 22 of the reference mounting plate 20 respectively, the center of the 15 pairs of positioning holes 31 can be aligned with the axis of the reference hole 22 of the reference mounting plate 20, thereby realizing the radial movement of the stator mounting plate 30, which in turn drives the stator 1 to move in the radial direction, and finally realizes the radial movement of the stator 1 relative to the rotor 2, thereby achieving the purpose of setting the coaxiality deviation value between the stator 1 and the rotor 2.

[0031] The specific operation is as follows: First, the operator installs the reference mounting plate 20 in the receiving hole 11 of the mounting base 10, ensuring that the test spindle 21 is correctly installed and can rotate flexibly, and that the upper end face of the reference mounting plate 20 is flush with the upper end face of the mounting base 10. Then, the rotor 2 is installed on the test spindle 21 and fixed. Next, the stator 1 is placed on the mounting base 10 via the stator mounting plate 30. At this time, the reference hole 22 on the reference mounting plate 20 is connected to the pair of positioning holes 31 on the stator mounting plate 30 with the required target accuracy using the positioning pin 33. Due to the precise design of the reference hole 22 and the positioning hole 31 and the precise guidance of the positioning pin 33, the stator mounting plate 30 can quickly and accurately move to its relative position with respect to the reference mounting plate 20, thereby quickly adjusting the required coaxiality setting between the stator 1 and the rotor 2. After that, the stator mounting plate 30 can be fixed on the mounting base 10, completing the setting of the concentricity deviation between the stator mounting plate 30 (stator 1) and the test spindle 21 (rotor 2). Throughout the adjustment process, the synergistic effect of the reference hole 22, the positioning hole 31, and the positioning pin 33 provides a strong guarantee for the precise adjustment of the stator 1 and rotor 2 positions, ensuring the accuracy and reliability of the rotary transformer test.

[0032] Reference Figures 2 to 3In some embodiments of this utility model, the stator mounting plate 30 and the reference mounting plate 20 are detachably connected. After setting the concentricity deviation between the stator mounting plate 30 (stator 1) and the test spindle 21 (rotor 2), it is necessary to keep the reference mounting plate 20 and the stator mounting plate 30 relatively fixed. Therefore, the reference mounting plate 20 is detachably connected to the stator mounting plate 30. Specifically, a bolt connection can be used to achieve the detachable connection between the stator mounting plate 30 and the reference mounting plate 20. Threaded holes and through holes are respectively opened at corresponding positions on the reference mounting plate 20 and the stator mounting plate 30 to ensure that the bolts can be screwed in smoothly and the connection is firm. When connecting, the reference mounting plate 20 is installed first, and then the stator mounting plate 30 is placed in a suitable position so that the positioning pin 33 connects the positioning hole 31 and the reference hole 22. At this time, the through hole and the threaded hole are aligned, and the two can be connected by bolts. Alternatively, a snap-fit ​​connection can also be used to achieve the detachable connection between the stator mounting plate 30 and the reference mounting plate 20. A slot is provided on the reference mounting plate 20, and a corresponding snap-fit ​​structure is provided on the stator mounting plate 30. During installation, after the positioning pin 33 connects to the positioning hole 31 and the reference hole 22, the snap-fit ​​on the stator mounting plate 30 can be aligned with the slot on the reference mounting plate 20, and then a certain pressure is applied to make the snap-fit ​​engage in the slot. At this time, the stator mounting plate 30 and the reference mounting plate 20 are connected. This connection method allows for very quick installation and disassembly without the need for tools, which can greatly improve the assembly and disassembly efficiency of the test fixture. Of course, it is also understandable that after the positioning pin 33 connects to the positioning hole 31 and the reference hole 22, the reference mounting plate 20 can also be supported by the operator's hand. After adjusting the concentricity deviation of the stator 1 and rotor 2 of the rotary transformer and the axial height deviation of the stator 1 and rotor 2, the reference mounting plate 20 can be released.

[0033] Reference Figures 1 to 3In some embodiments of this utility model, the stator mounting plate 30 is fixedly connected to the mounting base 10 by connecting screws 32. The diameter of the mounting hole on the stator mounting plate 30 is larger than that on the mounting base 10. The connecting screws 32 are disposed on the mounting holes of the stator mounting plate 30 and the mounting base 10. As can be seen from the foregoing embodiments, when assembling the test fixture, after the coaxiality between the stator 1 and the rotor 2 is set, the stator mounting plate 30 needs to be fixed on the mounting base 10. Specifically, the reference mounting plate 20 is first installed in the receiving hole 11 of the mounting base 10 to ensure that the test spindle 21 is installed correctly and can rotate flexibly. At the same time, the rotor 2 is installed on the test spindle 21 and fixed firmly. Next, the stator mounting plate 30 is placed on the mounting base 10. After connecting the positioning hole 31 and the reference hole 22 through the positioning pin 33, the axis of the stator mounting plate 30 is offset relative to the reference mounting plate 20. The coaxiality offset of the stator 1 and the rotor 2 is set. Then, the stator mounting plate 30 can be installed on the mounting base 10 by connecting screws 32. At this time, because the mounting hole diameter on the stator mounting plate 30 is relatively large, the stator mounting plate 30 has a certain amount of room for movement in the horizontal direction. This can accommodate the connection of the connecting screws 32 after the stator mounting plate 30 has a certain amount of horizontal offset. After the stator mounting plate 30 is fixedly connected to the mounting base 10 by connecting screws 32, the stator 1 is fixed, and the coaxiality deviation of the stator 1 and the rotor 2 is set.

[0034] Reference Figure 3 In some embodiments of this invention, the test spindle 21 and the rotor 2 are detachably connected. Specifically, a common detachable connection method is to use a key connection. Alternatively, screw or threaded connections are also feasible detachable connection methods. Specifically, the test spindle 21 passes through the rotor 2, with a protrusion (not shown in the figure) inside the rotor 2, and a shoulder (not shown in the figure) at the corresponding position on the test spindle 21. The shoulder of the test spindle 21 can be connected to the protrusion of the rotor 2 using screws, thus achieving a detachable connection between the test spindle 21 and the rotor 2. Simultaneously, to prevent loosening of the threads, an appropriate amount of thread-locking adhesive can be applied to the threaded connection. When it is necessary to disassemble the rotor 2, simply use a wrench to rotate the rotor 2 in the reverse direction to unscrew it from the test spindle 21.

[0035] Reference Figures 2 to 3In some embodiments of this utility model, a limiting screw 23 is provided at the lower end of the reference mounting plate 20 in the radial direction. The reference mounting plate 20 is connected to the test spindle 21 through the limiting screw 23, and the inner end of the limiting screw 23 is located in the annular groove 211 circumferentially provided in the test spindle 21. As can be seen from the foregoing embodiments, after the coaxiality deviation between the stator 1 and the rotor 2 is set, it is necessary to adjust the axial distance between the rotor 2 and the stator 1 to complete the setting of the axial deviation between the stator 1 and the rotor 2. Therefore, in this embodiment, after adjusting the concentricity deviation between the stator 1 and the rotor 2 of the rotary transformer and the axial height deviation between the stator 1 and the rotor 2, it is necessary to remove the connecting screw 32 that fixes the stator mounting plate 30 and the reference mounting plate 20, and then move the reference mounting plate 20 downward along the test spindle 21 to the annular groove 211 of the test spindle 21. At this time, the limiting screw 23 is installed on the reference mounting plate 20 and pressed into the annular groove 211 to limit the position of the reference mounting plate 20. This can limit the position of the reference mounting plate 20 without interfering with the rotation of the test spindle 21.

[0036] Reference Figures 1 to 3 In some embodiments of this utility model, the test spindle 21 is driven to rotate by a drive motor 40. The drive motor 40 is mounted below the mounting base 10 via a motor mounting bracket 12. The test spindle 21 is adjustablely connected to the output shaft of the drive motor 40 via an adjusting connector 41, allowing the axial position of the test spindle 21 relative to the output shaft of the drive motor 40 to be adjusted. During actual testing, the test spindle 21 is connected to the output shaft of the drive motor 40 via a key connection. When the drive motor 40 starts, it smoothly transmits power to the test spindle 21 via the key connection, causing the test spindle 21 to drive the rotor 2 to rotate. Because the position of the test spindle 21 relative to the output shaft of the drive motor 40 is adjustable via the adjusting connector 41, the axial position of the test spindle 21 can be easily and precisely adjusted according to the required axial deviation settings, ensuring the accuracy of the relative axial position between the stator 1 and the rotor 2, thereby improving the accuracy and reliability of the rotary transformer test. Simultaneously, the adjusting connector 41 also facilitates the installation, debugging, and maintenance of the testing fixture, improving the overall efficiency and flexibility of the testing system.

[0037] Specifically, refer to Figure 3In some embodiments of this utility model, the adjusting connector 41 is rotatably engaged in the test spindle 21, and one end of the adjusting connector 41 is threadedly connected to the output shaft of the drive motor 40. Specifically, the adjusting connector 41 can be an adjusting screw, with its threaded end threadedly connected to the output shaft of the drive motor 40. Simultaneously, the adjusting screw can rotate freely relative to the test spindle 21. It should be noted that the adjusting screw is engaged inside the test spindle 21, thus its axial direction relative to the test spindle 21 remains fixed. Therefore, in actual testing, when it is necessary to adjust the position of the test spindle 21 relative to the output shaft of the drive motor 40, since the adjusting connector 41 is rotatably engaged with the test spindle 21 and threadedly connected to the output shaft of the drive motor 40, simply rotating the adjusting connector 41 allows it to move axially on the output shaft of the drive motor 40 through the transmission action of the thread, simultaneously causing the test spindle 21 to move axially relative to the drive motor 40. The drive motor 40 is fixedly connected to the mounting base 10, and the stator mounting plate 30 is fixedly mounted on the mounting base 10. The stator 1 is fixedly connected to the stator mounting plate 30. Therefore, the test spindle 21 can generate axial displacement relative to the stator 1, thereby achieving precise adjustment of the axial position of the test spindle 21, and further achieving adjustment of the axial position between the rotor 2 and the stator 1, ultimately completing the setting of the axial deviation between the stator 1 and the rotor 2. This adjustment method is convenient to operate, has high adjustment accuracy, and can meet the strict requirements for the position of the test spindle 21 during rotary transformer testing, improving the accuracy and reliability of the test.

[0038] Furthermore, referring to Figure 3 In some embodiments of this utility model, a limiting shim 42 is provided in the test spindle 21. The limiting shim 42 is detachably connected to the interior of the test spindle 21, and the adjusting connector 41 is rotatably inserted into the limiting hole of the limiting shim 42. Because the limiting hole is reasonably designed, the adjusting connector 41 can rotate freely around its own axis within the limiting hole. Simultaneously, the adjusting connector 41 is engaged in the limiting hole. During the rotation of the adjusting connector 41, the limiting shim 42 restricts the axial displacement of the adjusting connector 41, thereby ensuring the relative position stability between the adjusting connector 41 and the test spindle 21. This ensures that the axial displacement between the test spindle 21 and the drive motor 40 can be stably adjusted through the adjusting connector 41.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A test fixture for a rotary transformer, characterized in that, The rotary transformer includes a stator and a rotor, and the rotary transformer testing fixture includes: Mounting base, wherein the mounting base is provided with a receiving hole; A reference mounting plate is rotatably disposed in the receiving hole. The upper end face of the reference mounting plate is flush with the upper end face of the mounting base. A rotatable test spindle is sleeved at the center of the reference mounting plate. The rotor is sleeved on the outside of the test spindle. The test spindle and the rotor are fixedly connected and coaxially arranged. The test spindle can move along the axial direction, driving the rotor to move along the axial direction to adjust the vertical relative position between the stator and the rotor. A stator mounting plate is adjustablely positioned on the mounting base, the stator mounting plate is sleeved on the outside of the stator, the stator mounting plate is coaxially arranged with the stator, and the stator mounting plate can move radially to adjust the coaxiality between the stator and the rotor.

2. The rotary transformer testing fixture according to claim 1, characterized in that, The reference mounting plate is provided with two reference holes, which are centrally symmetrically distributed with the axis of the test spindle as the center of symmetry. The stator mounting plate is provided with several pairs of positioning holes, and the line connecting each pair of positioning holes passes through the axis of the test spindle. The distance between two reference holes is equal to the distance between each pair of positioning holes. The midpoint between each pair of positioning holes is offset from the axis of the test spindle. The reference holes and the positioning holes are connected by positioning pins.

3. The rotary transformer testing fixture according to claim 2, characterized in that, The distance between the midpoint between the positioning holes and the axis of the test spindle is greater than or equal to 0.

4. The rotary transformer testing fixture according to claim 1, characterized in that, The stator mounting plate and the reference mounting plate are detachably connected.

5. The rotary transformer testing fixture according to claim 1, characterized in that, The stator mounting plate is fixedly connected to the mounting base by connecting screws. The diameter of the mounting hole on the stator mounting plate is larger than that of the mounting hole on the mounting base. The connecting screws are disposed on the mounting holes of the stator mounting plate and the mounting base.

6. The rotary transformer testing fixture according to claim 1, characterized in that, The test spindle and the rotor are detachably connected.

7. The rotary transformer testing fixture according to claim 1, characterized in that, A limiting screw is provided at the lower end of the reference mounting plate in the radial direction. The reference mounting plate is connected to the test spindle through the limiting screw. The inner end of the limiting screw is located in the annular groove provided in the circumferential direction of the test spindle.

8. The rotary transformer testing fixture according to claim 1, characterized in that, The test spindle is driven to rotate by a drive motor, which is mounted below the mounting base via a motor mounting bracket. The test spindle is connected to the output shaft of the drive motor via an adjusting connector, and the position of the test spindle relative to the output shaft of the drive motor is adjustable.

9. The rotary transformer testing fixture according to claim 8, characterized in that, The adjusting connector is rotatably engaged in the test spindle, and one end of the adjusting connector is threadedly connected to the output shaft of the drive motor.

10. The rotary transformer testing fixture according to claim 9, characterized in that, The test spindle is provided with a limiting shim, which is detachably connected to the interior of the test spindle. The adjusting connector is rotatably inserted into the limiting hole of the limiting shim.

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