Device and method for adjusting coaxiality of torque motor

Abstract

The invention relates to a torque motor coaxiality adjusting device and method. The torque motor coaxiality adjusting device comprises an outer shell adjusting disc and a fastening screw. An annular groove is formed in one surface of the shell adjusting disc; a cylindrical boss is formed on the inner ring surface of the annular groove, the diameter of the cylindrical boss is consistent with the aperture of the center hole of the torque motor rotor, and the cylindrical boss is used for being inserted and matched with the center hole of the torque motor rotor to achieve center alignment of the outer shell adjusting disc and the rotor; the outer ring surface of the annular groove is a coaxiality adjusting reference surface, and the outer diameter of the outer ring surface is smaller than the diameter of the outer ring surface of the stator shell; a circle of screw via holes are formed in the end face of the outer shell adjusting disc and located on the periphery of the cylindrical boss, receding through holes are formed between the adjacent screw via holes, and the screw via holes are used for fastening screws, so that the outer shell adjusting disc and the rotor are coaxially and fixedly connected; the receding through hole is used for installing and adjusting a connecting screw between the rotor and the rotor fixing frame. The device is simple in structure and convenient to adjust, and the coaxiality adjusting efficiency can be effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of torque motor assembly, and in particular relates to a torque motor coaxiality adjustment device and method. Background Art

[0002] Compared with ordinary motors, torque motors are mainly characterized by high precision, small size, high power density and fast response speed. They are a more important type of motor. In some high-precision drive systems, such as frame system platforms, there are high requirements for the interface size and shape between the motor and the system, especially the coaxiality between the shaft hole and the outer circle of the motor.

[0003] For torque motors with an integrated rotor and rotor mounting, the coaxiality of the whole machine can be guaranteed by ensuring the machining accuracy of the parts; for torque motors with a split rotor and rotor mounting, the coaxiality of the whole machine can only be guaranteed by the motor assembly accuracy. For torque motors that require manual assembly, the coaxiality of the whole machine is traditionally guaranteed through special assembly processes, but most of these assembly processes are relatively complex, with low assembly efficiency and are not suitable for mass production. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a device and method for adjusting the coaxiality of torque motors that can improve the adjustment and assembly efficiency, reduce the difficulty of the assembly process, and is suitable for batch production.

[0005] One of the above objects of the present invention is achieved by the following technical solution:

[0006] A device for adjusting the coaxiality of a torque motor, characterized in that it comprises an outer shell adjusting disk and a fastening screw; the outer shell adjusting disk is in the shape of a disc as a whole, and an annular groove is provided on one side of the outer shell adjusting disk, and the coaxiality of the outer ring surface and the inner ring surface of the annular groove is less than the coaxiality of the torque motor; the inner ring surface of the annular groove forms a cylindrical boss, and the diameter of the cylindrical boss is consistent with the aperture of the center hole of the torque motor rotor, which is used for inserting and matching with the center hole of the torque motor rotor to achieve the center alignment of the outer shell adjusting disk and the rotor; the outer ring surface of the annular groove is a coaxiality adjustment reference surface, and its outer diameter is smaller than the diameter of the outer ring surface of the stator shell; a circle of screw through holes is provided on the end surface of the outer shell adjusting disk at the periphery of the cylindrical boss, and clearance through holes are provided between adjacent screw through holes, and the screw through holes are used for fastening screws to achieve the coaxial fixed connection between the outer shell adjusting disk and the motor rotor; the clearance through holes are used to install and adjust the connecting screws between the motor rotor and the rotor fixing frame.

[0007] Moreover, a process threaded hole is formed on the end surface of the boss at the center of the outer shell adjusting disk, which is used for installing and disassembling auxiliary screws when disassembling the outer shell adjusting disk.

[0008] The second objective of the present invention is achieved by the following technical solutions:

[0009] A method for adjusting the coaxiality of a torque motor, using the above-mentioned device for adjusting the coaxiality of a torque motor, comprises the following steps:

[0010] Step 1: Insert the cylindrical boss at the center of the outer shell adjustment disk into the center hole of the motor rotor, and use the fastening screws to fix the shell adjustment disk and the motor rotor;

[0011] Step 2: Install the screws connecting the motor rotor and the rotor fixing frame into the corresponding screw holes through the clearance holes one by one, but do not tighten them;

[0012] Step 3: Slowly rotate the outer casing adjustment disk by hand to adjust the position of the motor rotor, and adjust the screws connecting the rotor fixing frame and the motor rotor until the outer ring surface of the annular groove on the outer casing adjustment disk and the outer ring surface of the stator housing of the motor have no friction contact, so as to adjust the coaxiality of the motor rotor and the motor stator;

[0013] Step 4: Then use a tool to symmetrically tighten the screws connecting the rotor fixing frame and the rotor several times to achieve a fixed connection between the rotor and the rotor fixing frame;

[0014] Step 5: After the motor rotor and rotor fixing frame are connected, loosen the fastening screws and remove the outer casing adjustment disk.

[0015] The advantages and positive effects of the present invention are:

[0016] 1. The adjusting device of the present invention sets the coaxial positioning surface and the adjusting reference surface on the same workpiece, has a simple structure, low parts processing cost, and a relatively novel adjustment method.

[0017] 2. The adjusting device of the present invention takes up little space and is easy to operate, while ensuring the accuracy of adjustment.

[0018] 3. The present invention is suitable for rapid adjustment of the coaxiality of small torque motors, effectively improving the efficiency of coaxiality adjustment, and is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1a is a perspective view of the coaxiality adjustment device of the present invention, and 1b is a plan view;

[0020] Figure 2 2a is a front view and 2b is a side sectional view;

[0021] Figure 3 This is a reference diagram of the present invention using a coaxiality adjustment device to perform coaxiality adjustment. DETAILED DESCRIPTION

[0022] The structure of the present invention is further described below with reference to the accompanying drawings and by way of examples. It should be noted that the present examples are descriptive rather than restrictive.

[0023] A torque motor coaxiality adjustment device, see Figure 1-Figure 3 The invention point is: it is mainly composed of an outer shell adjusting disk 2 and a fastening screw 3, and the outer shell adjusting disk is made of stainless steel 30Cr13.

[0024] The outer shell adjustment disk is in the shape of a disk as a whole, and an annular groove 2.1 is provided on one side of the outer shell adjustment disk. The coaxiality of the outer ring surface 2.1.2 and the inner ring surface 2.1.1 of the annular groove is smaller than the coaxiality required by the torque motor. The inner ring surface of the annular groove forms a cylindrical boss 2.3, and the diameter of the cylindrical boss is consistent with the aperture of the torque motor rotor center hole, which is used to match the torque motor rotor center hole to achieve the center alignment of the outer shell adjustment disk and the rotor. The outer ring surface of the annular groove is a coaxial adjustment reference surface, and its outer diameter is slightly smaller than the outer ring surface diameter of the stator shell. A circle of screw through holes 2.4 is provided on the end surface of the outer shell adjustment disk at the periphery of the cylindrical boss, and a clearance through hole 2.2 is provided between adjacent screw through holes. The screw through hole is used to tighten the screw to achieve the coaxial fixed connection between the outer shell adjustment disk and the motor rotor. The clearance through hole is used to install and adjust the connecting screws between the motor rotor and the rotor fixing frame.

[0025] During installation, insert the cylindrical boss at the center of the outer shell adjustment disk into the center hole of the motor rotor, and use the fastening screws to fix the shell adjustment disk and the motor rotor; install the screws connecting the motor rotor 1.2 and the rotor fixing frame 1.1 into the corresponding screw holes through the clearance holes one by one, and do not tighten them; slowly rotate the outer shell adjustment disk by hand to adjust the position of the motor rotor, and adjust the screws connecting the rotor fixing frame and the motor rotor until the outer ring surface of the annular groove on the outer shell adjustment disk and the outer ring surface of the stator shell 1.3 of the motor have no friction contact; then use tools to symmetrically tighten the screws connecting the rotor fixing frame and the rotor several times to avoid introducing unbalanced force that causes the motor coaxiality to deteriorate; after the motor rotor and the rotor fixing frame are connected, loosen the fastening screws and remove the outer shell adjustment disk.

[0026] In order to facilitate the disassembly of the outer shell adjusting disk, a process threaded hole can be made on the end face of the boss in the center of the outer shell adjusting disk. When the center hole of the torque motor rotor is tightly matched with it and it is difficult to disassemble, a disassembly auxiliary screw can be installed at the process threaded hole, and the inner end of the disassembly auxiliary screw is made into a round head shape, etc. The inner end of the disassembly auxiliary screw is pressed against the corresponding end face of the torque motor, and the disassembly auxiliary screw is rotated to apply an outward pulling force to the outer shell adjusting disk, thereby facilitating the disassembly of the adjusting disk.

[0027] As a preferred solution, the dimensional tolerance band of the outer shell adjustment disk and the outer circle of the outer shell can be set to a stepped form. When processing the adjustment disk, it is processed separately according to the step size to form a set of tooling, which can be selected for motor shells with different dimensional tolerance bands to ensure the accuracy of the adjustment.

[0028] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A torque motor coaxiality adjustment device, characterized in that: It includes an outer shell adjusting disk and a fastening screw; the outer shell adjusting disk is in the shape of a disc as a whole, and an annular groove is provided on one side of the outer shell adjusting disk, and the coaxiality of the outer ring surface and the inner ring surface of the annular groove is less than the coaxiality of the torque motor; the inner ring surface of the annular groove forms a cylindrical boss, and the diameter of the cylindrical boss is consistent with the aperture of the center hole of the torque motor rotor, which is used for plug-in cooperation with the center hole of the torque motor rotor to realize the center alignment of the outer shell adjusting disk and the rotor; the outer ring surface of the annular groove is a coaxiality adjustment reference surface, and its outer diameter is less than the diameter of the outer ring surface of the stator shell; a circle of screw through holes is provided on the end face of the outer shell adjusting disk at the periphery of the cylindrical boss, and clearance through holes are provided between adjacent screw through holes, and the screw through holes are used for fastening screws to realize the coaxial fixed connection between the outer shell adjusting disk and the torque motor rotor; the clearance through holes are used to install and adjust the connecting screws between the torque motor rotor and the rotor fixing frame.

2. The torque motor coaxiality adjustment device according to claim 1 is characterized in that: A process threaded hole is formed on the end surface of the boss in the center of the outer shell adjusting disk, which is used for installing and disassembling auxiliary screws when disassembling the outer shell adjusting disk.

3. A method for adjusting the coaxiality of a torque motor, characterized in that: The torque motor coaxiality adjustment device according to claim 1 or 2 comprises the following steps: Step 1: Insert the cylindrical boss at the center of the outer shell adjustment disk into the center hole of the motor rotor, and use the fastening screws to fix the shell adjustment disk and the motor rotor; Step 2: Install the screws connecting the motor rotor and the rotor fixing frame into the corresponding screw holes through the clearance holes one by one, but do not tighten them; Step 3: Slowly rotate the outer casing adjustment disk by hand to adjust the position of the motor rotor, and adjust the screws connecting the rotor fixing frame and the motor rotor until the outer ring surface of the annular groove on the outer casing adjustment disk and the outer ring surface of the stator housing of the motor have no friction contact, so as to adjust the coaxiality of the motor rotor and the motor stator; Step 4: Then use a tool to symmetrically tighten the screws connecting the rotor fixing frame and the rotor several times to achieve a fixed connection between the rotor and the rotor fixing frame; Step 5: After the motor rotor and rotor fixing frame are connected, loosen the fastening screws and remove the outer casing adjustment disk.

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