Encoder centering tool
By designing an encoder alignment fixture and utilizing an integrated aluminum molding process, high-precision coaxiality positioning is achieved, solving the problem of cumbersome operation in existing technologies and improving the installation efficiency and equipment stability of split encoders.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG REAGLE SENSING TECH CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-15
AI Technical Summary
The mechanical tooling of existing split encoders is cumbersome and time-consuming, making it difficult to achieve precise alignment of the encoder stator and rotor, which affects measurement accuracy and equipment stability.
The encoder-aligned fixture, including an adjustment base, a first positioning cylinder, and a second positioning cylinder, is used. High-precision coaxiality is ensured through an integrated molding process. The processing performance of aluminum material is utilized to achieve accurate positioning, reduce vibration and noise caused by eccentricity, and improve installation efficiency.
It achieves precise positioning of the split encoder, reduces vibration and noise caused by mechanical eccentricity, improves equipment operating accuracy and stability, and simplifies the operation process.
Smart Images
Figure CN224247056U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of encoder installation technology, and in particular to an encoder alignment fixture. Background Technology
[0002] Split-type encoders, installed on motors or other automated equipment, are widely used in industrial automation and other fields to detect the angular displacement and rotational speed of the code disk holder. A split-type encoder typically consists of a stator and a rotor. The stator includes a housing and a PCBA containing the reading head, while the rotor consists of the code disk and the code disk holder. Since it has no rotational reference (and does not include built-in bearings), the coaxiality of the encoder's stator and rotor must be ensured during installation.
[0003] Concentric alignment is a core prerequisite for the normal operation and performance of split encoders, directly determining their measurement accuracy, reliability, lifespan, and system integration efficiency. Split encoder alignment fixtures are specialized tools used to ensure precise alignment between the split encoder and the motor shaft or transmission components. Achieving precise alignment through mechanical fixtures transforms the traditional experience-based adjustment process into standardized mechanical positioning, solving performance problems caused by misalignment at the source. This is crucial for improving the stability and intelligence level of industrial automation equipment. However, existing mechanical fixtures are cumbersome to operate, time-consuming to align, and difficult to adapt to compact designs. Utility Model Content
[0004] The encoder alignment fixture provided by this utility model adopts the following technical solution:
[0005] An encoder alignment fixture for adjusting the coaxiality of the rotor and stator of a split encoder includes an adjustment base as a basic support component; a first positioning cylinder, located on the adjustment base and integrally formed with the adjustment base, for positioning the stator assembly of the encoding device; and a second positioning cylinder, located on the first positioning cylinder and integrally formed with the first positioning cylinder, for positioning the rotor assembly of the encoding device; wherein the diameter of the first positioning cylinder is larger than the diameter of the second positioning cylinder.
[0006] Preferably, it also includes a content hole, at least partially located inside the second positioning cylinder.
[0007] Preferably, the coaxiality error between the first positioning cylinder and the second positioning cylinder is ≤0.02mm.
[0008] Preferably, the surface roughness of the first positioning cylinder and the second positioning cylinder is Ra1.6μm.
[0009] Preferably, it is made of metallic material.
[0010] Compared with existing technologies, the split encoder of this invention uses a centering fixture for precise positioning, which reduces vibration, noise and measurement errors caused by encoder mechanical eccentricity, improves equipment operating accuracy and stability, is easy to operate, and increases the installation efficiency of the split encoder. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of an encoder alignment fixture according to the present invention.
[0012] Figure 2 This is another schematic diagram of an encoder alignment tool according to the present invention.
[0013] Figure 3 This is another schematic diagram of the installation of an encoder alignment tool according to the present invention.
[0014] Figure 4 This is a schematic diagram of the actual alignment of an encoder alignment tool according to the present invention.
[0015] Explanation of reference numerals in the attached figures:
[0016] 1. Encoder alignment fixture, 101. Base, 102. First positioning cylinder, 1021. Outer side of the first positioning cylinder, 103. Second positioning cylinder, 1031. Outer side of the second positioning cylinder, 104. Content hole;
[0017] 2. Split encoder, 201, housing, 2011, inner wall of housing, 202, code disk holder, 2021, inner wall of code disk holder;
[0018] 301. Rotor fastening screws; 302. Stator fastening screws;
[0019] 4. The device under test. Detailed Implementation
[0020] The present invention will be further described in detail below with reference to the accompanying drawings.
[0021] Reference Figure 1 and Figure 2The encoder alignment fixture 1 mainly consists of a base 101, a first positioning cylinder 102, a second positioning cylinder 103, and an internal hole 104, all made of aluminum. The first positioning cylinder 102 stands vertically on the base 101, and the two are manufactured using a one-piece molding process. The excellent machinability of aluminum allows for precise one-piece molding, achieving a surface roughness of Ra 1.6μm, fundamentally ensuring extremely high connection stability and precise positional accuracy between the first positioning cylinder 102 and the base 101. The second positioning cylinder 103 is located above the first positioning cylinder 102, integrally molded with it, and has a smaller diameter than the first positioning cylinder 102. The properties of aluminum help ensure that the first positioning cylinder 102 and the second positioning cylinder 103 achieve extremely high coaxiality standards after machining, with a coaxiality error ≤0.02mm, fully meeting the stringent requirements for high-precision positioning of the encoder alignment fixture. At least a portion of the internal hole 104 is located within the internal space of the second positioning cylinder 103.
[0022] The first positioning cylinder 102 is used to position the stator assembly of the encoding device, and the second positioning cylinder 103 is used to position the rotor assembly of the encoding device.
[0023] refer to Figure 3 and Figure 4 During installation of the split encoder, the code disk holder 202 of the rotor part of the split encoder 2 is fixed to the rotor mounting shaft of the device under test 4 by the rotor fastening screw 301; the housing 201 of the stator part of the split encoder 2 is pre-installed on the stator mounting shaft of the device under test 4 by the stator fastening screw 302. When adjusting the coaxiality of the split encoder 2 using the encoder alignment tool 1, the inner hole 104 is fitted onto the rotor fastening screw 301. The base 101 of the encoder alignment tool 1 is adjusted so that the outer side 1031 of the second positioning cylinder 103 and the inner hole wall 2021 of the code disk holder of the code disk holder 202 of the split encoder 2 form a hole-shaft fit, pressing them together until they are tightly fitted without air gap; the outer side 1021 of the first positioning cylinder 102 and the inner hole wall 2011 of the housing 201 of the split encoder 2 form a precise hole-shaft fit relationship, pressing them together until they are tightly fitted without air gap. Remove encoder alignment fixture 1 and tighten stator fastening screws 302. After installation, transfer the accuracy of encoder alignment fixture 1 to the stator and rotor of the split encoder 2, so that the coaxiality of the stator and rotor of the split encoder 2 is ≤0.02mm.
[0024] The split encoder, fastening screw, and device under test in the above embodiments are existing technologies, and their structures will not be described in detail here.
[0025] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. An encoder alignment fixture for adjusting the coaxiality of the rotor and stator of a split encoder, characterized in that, include: Base; The first positioning cylinder is located on the base and is integrally formed with the base, and is used to position the stator assembly of the encoding device; The second positioning cylinder is located on the first positioning cylinder and is integrally formed with the first positioning cylinder, and is used to position the rotor assembly of the coding device; The diameter of the first positioning cylinder is larger than the diameter of the second positioning cylinder.
2. The encoder centering fixture according to claim 1, characterized in that, It also includes a content hole, which is at least partially located inside the second positioning cylinder.
3. The encoder centering fixture according to claim 1, characterized in that, The coaxiality error between the first positioning cylinder and the second positioning cylinder is ≤0.02mm.
4. The encoder centering fixture according to claim 1, characterized in that, The surface roughness of the first positioning cylinder and the second positioning cylinder is Ra1.6μm.
5. The encoder centering fixture according to claim 1, characterized in that, Made of metallic materials.