Split type stepping motor torque test tool

Abstract

The invention discloses a split type stepping motor torque testing tool, and belongs to the technical field of stepping motor production equipment. The split type stepping motor torque testing process equipment comprises a testing shaft, a switching disc, a mounting disc, a bearing and a pressing sleeve. The split type stepping motor torque testing device is suitable for split type stepping motor torque testing, is especially suitable for spaceflight high-precision split type stepping motor testing, can solve the problem that existing equipment is tedious in manual disassembly and assembly, and overcomes the problems that concentricity does not reach the standard, rotor and stator interference occurs, and air gaps are not uniform in the existing testing process.

Description

Technical Field

[0001] The invention belongs to the technical field of stepper motor production equipment, and in particular relates to a split stepper motor torque test tool. Background Art

[0002] In order to verify whether the machining accuracy of each stepper motor component and the motor assembly accuracy meet the technical index requirements, the stepper motor must be accurately tested for torque after assembly. However, for split motors, especially J33 split stepper motors, the motor stator and rotor are separated, which reduces the installation of housing and bearings on the basis of the original integral motor. This reduces the production cost of the motor on the one hand, but brings new difficulties to the testing work on the other hand.

[0003] At present, for split motors, most manufacturers make a molded casing according to the outer diameter of the stator and the front and rear bearing positions of the rotor assembly, and then install the back cover. The back cover is connected to the casing by screws, and the motor lead wires are led out through the holes in the rear end cover to complete the split motor performance parameter test. However, this kind of test tooling is cumbersome to operate manually, difficult to disassemble and assemble, and reduces the work efficiency. In addition, when testing the rotor of the split motor, a test shaft is required to install the rotor. The concentricity of the test shaft, stator, and rotor will seriously affect the various test results of the motor. Therefore, the existing detection methods and tooling are not competent for the accurate testing of stepper motors, especially high-precision stepper motors used in the aerospace field. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention designs a split stepper motor torque testing tool to overcome the problems of cumbersome manual operation and low detection efficiency in the prior art, while having a reliable structural foundation for improving concentricity.

[0005] The present invention provides a split stepper motor torque test tool, which is characterized in that it includes a test shaft, an adapter plate and a mounting plate, the adapter plate is a hollow cylinder with connecting flanges at both ends, the right end of the test shaft penetrates into the hollow cylinder and is coaxially installed with the right end of the hollow cylinder through a bearing, the left end of the test shaft extends out of the hollow cylinder and is coaxially mounted on the mounting plate through another bearing, and the mounting plate and the adapter plate are coaxially fixedly connected, the cylindrical inner cavity at the left end of the mounting plate is used to mount and fix the stator of the motor to be tested and is coaxial with the stator of the motor to be tested, and the left end of the test shaft is used to mount the rotor of the motor to be tested.

[0006] Furthermore, it also includes a clamping sleeve, which is sleeved on the left end of the test shaft. The test shaft is provided with a step at the installation position of the motor rotor to be tested, and the motor rotor to be tested is pressed onto the step by the clamping sleeve.

[0007] Furthermore, the center of the right end of the mounting plate has an annular protrusion coaxial with the central mounting hole at the left end of the hollow cylinder, and the annular protrusion is adapted to be inserted in the mounting hole.

[0008] Furthermore, the left end of the test shaft has an external thread, and the clamping sleeve is fitted with the external thread through its internal thread, and the clamping sleeve is rotated to move rightward to clamp the rotor of the motor to be tested onto the step.

[0009] Furthermore, the left end of the test shaft is provided with a radial threaded hole.

[0010] Compared with the prior art, the outstanding effects of the present invention are: ① The process equipment has a simple structure, which is easy to disassemble and install, and the test efficiency is improved; ② The concentricity is good, which can ensure the correct calibration of the motor performance; ③ It ensures that the stator and rotor do not interfere with each other during the test and the air gap is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a general structural diagram of an embodiment of the present invention; Figure 2 is a structural diagram of a test shaft of an embodiment; Figure 3 is a structural diagram of an adapter plate of an embodiment; Figure 4 is a structural diagram of an embodiment installation disk; Figure 5 It is a structural diagram of a compression sleeve of an embodiment. DETAILED DESCRIPTION

[0012] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0013] like Figure 1 As shown, the embodiment of the present invention includes a test shaft 1, an adapter plate 2, a mounting plate 3, a bearing 4 and a clamping sleeve 5, all of which are coaxial and placed horizontally. The right end of the test shaft 1 penetrates the adapter plate 2 and is coaxially connected to the right end of the adapter plate 2 through the bearing 4, and the left end of the test shaft 1 extends out of the adapter plate 2 and is coaxially mounted on the mounting plate 3 through another bearing 4. The right side of the mounting plate 3 is fixedly connected to the adapter plate 2, the left end of the mounting plate 3 is used to mount and fix the stator of the motor under test, and the left end of the test shaft 1 is used to mount the rotor of the motor under test.

[0014] like Figure 2As shown, the test shaft 1 is a multi-step shaft, and the clamping sleeve 5, the motor rotor to be tested, the mounting plate 3 and the adapter plate 2 are installed from left to right. The test shaft 1 is provided with a step at the installation position of the motor rotor to be tested, and the test shaft 1 is also provided with an external thread 1-1 matching the internal thread 5-1 of the clamping sleeve 5 at the installation position of the clamping sleeve 5, and the motor rotor to be tested is clamped on the above-mentioned step through the clamping sleeve 5. A radial threaded hole 1-2 is provided at the front end of the left side of the test shaft 1 for installing a torque lever.

[0015] like Figure 3 As shown, the adapter plate 2 is a hollow cylinder with connecting flanges at both ends, and the two connecting flanges are used to connect the inclinometer and the mounting plate 3 respectively. Figure 4 As shown, the mounting plate 3 is a hollow cylinder with a connecting flange. With the connecting flange as the boundary, the cylindrical inner cavity 3-1 at the left end of the mounting plate 3 is used to fit and fix the stator of the motor to be tested and is coaxial with the stator of the motor to be tested. The center of the right end of the mounting plate 3 has an annular protrusion 3-2 coaxial with the central mounting hole 2-1 at the left end of the adapter plate 2. The annular protrusion 3-2 is embedded in the above-mentioned mounting hole 2-1, and the outer diameter of the annular protrusion 3-2 is adapted to the inner diameter of the mounting hole 2-1, which is used to ensure that the mounting plate 3 and the adapter plate 2 are coaxial. Figure 5 As shown, the clamping sleeve 5 is a hollow cylinder, and is provided with an internal thread 5-1 inside which matches with the external thread 1-1 of the test shaft 1, and its function is to fix the rotor of the motor to be tested.

[0016] When in use, first install the test shaft 1 on the right end of the adapter plate 2 through the bearing 4, then insert the mounting plate 3 into the test shaft 1 through another bearing 4, and insert the annular protrusion 3-2 of the mounting plate 3 into the mounting hole 2-1 of the adapter plate 2, and then fix the mounting plate 3 and the adapter plate 2 with bolts. Install the stator of the motor to be tested into the cylindrical inner cavity 3-1 at the left end of the mounting plate 3, and insert the rotor of the motor to be tested into the test shaft 1. After the rotor of the motor to be tested is installed in place, insert the clamping sleeve 5 and clamp the rotor of the motor to be tested through the thread.

[0017] When performing a torque test, the adapter plate 2 is fixed on the inclinometer, and the torque lever is installed in the threaded hole 1-2 in front of the test shaft 1, and the torque lever is installed on the pressure sensor or electronic balance. After the stepper motor is powered on, the relative position of the stepper motor stator and rotor is changed by rotating the inclinometer to achieve the test of the stepper motor's self-positioning torque and holding torque.

Claims

1. A split stepper motor torque test tool, characterized in that: The invention comprises a test shaft (1), an adapter plate (2) and a mounting plate (3), wherein the adapter plate (2) is a hollow cylinder with connecting flanges at both ends, the right end of the test shaft (1) penetrates into the hollow cylinder and is coaxially mounted with the right end of the hollow cylinder via a bearing (4), the left end of the test shaft (1) extends out of the hollow cylinder and is coaxially mounted on the mounting plate (3) via another bearing (4), and the mounting plate (3) and the adapter plate (2) are coaxially fixedly connected, the cylindrical inner cavity (3-1) at the left end of the mounting plate (3) is used to mount and fix the stator of the motor under test and is coaxial with the stator of the motor under test, and the left end of the test shaft (1) is used to mount the rotor of the motor under test.

2. The split stepper motor torque test fixture according to claim 1 is characterized in that: It also comprises a clamping sleeve (5), the clamping sleeve (5) being sleeved on the left end of the test shaft (1), the test shaft (1) being provided with a step at the installation position of the motor rotor to be tested, and the motor rotor to be tested being pressed onto the step by the clamping sleeve (5).

3. The split stepper motor torque test fixture according to claim 1, characterized in that: The center of the right end of the mounting plate (3) has an annular protrusion (3-2) coaxial with the central mounting hole (2-1) at the left end of the hollow cylinder, and the annular protrusion (3-2) is adapted to be inserted into the mounting hole (2-1).

4. The split stepper motor torque test fixture according to claim 2, characterized in that: The left end of the test shaft (1) has an external thread (1-1), and the clamping sleeve (5) is fitted with the external thread (1-1) via its internal thread (5-1). The clamping sleeve (5) is rotated to move rightward to clamp the rotor of the motor to be tested onto the step.

5. The split stepping motor torque test fixture according to any one of claims 1 to 4, characterized in that: The left end of the test shaft (1) is provided with a radial threaded hole (1-2).

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