High-precision absolute value encoder

Abstract

The utility model relates to a high-precision absolute value encoder, which comprises a main shaft, a thrust ring is arranged on the outer side of the main shaft, a code disc is arranged on the outer side of the thrust ring, and an anti-eccentricity micro pit is arranged on the outer wall of the thrust ring. According to the utility model, the technical problem that the measurement precision is reduced due to the eccentric phenomenon of the coded disc of the encoder in the prior art is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of encoders, and particularly relates to a high-precision absolute encoder. Background Art

[0002] In rotary machinery and automation equipment, an encoder disk is an important component for converting mechanical displacement into electrical signals to achieve precise measurement of parameters such as position and speed. However, existing encoder disks have certain limitations in practical applications. When the encoder disk is installed on the main shaft, due to manufacturing precision, installation errors, or the structural problems of the main shaft itself, the disk may exhibit eccentricity during rotation. This eccentricity causes the center of the disk not to coincide exactly with the geometric center of the main shaft, resulting in uneven signal output during the rotation of the encoder.

[0003] This eccentricity phenomenon will directly affect the measurement accuracy, leading to an increase in measurement errors, especially in occasions with high-precision requirements, where such errors are more obvious. Summary of the Utility Model

[0004] To solve this problem, the utility model proposes a high-precision absolute encoder, and designs an anti-eccentric micro-pit. An oil film is provided in the anti-eccentric micro-pit, thereby effectively eliminating or reducing the influence of the eccentricity of the encoder disk on the measurement accuracy.

[0005] The technical solution adopted by the utility model is as follows: The utility model provides a high-precision absolute encoder, including a main shaft, a thrust ring is installed on the outer side of the main shaft, an encoder disk is installed on the outer side of the thrust ring, and an anti-eccentric micro-pit is installed on the outer wall of the thrust ring.

[0006] Further, the thrust ring is of an annular structure and is closely attached to the outer surface of the main shaft.

[0007] Further, the inner diameter of the thrust ring is in interference fit with the outer diameter of the main shaft.

[0008] Further, the encoder disk is fixed on the outer surface of the thrust ring and is coaxially arranged with the main shaft.

[0009] Further, the anti-eccentric micro-pits are evenly distributed on the outer wall of the thrust ring.

[0010] Further, the anti-eccentric micro-pit is a circular or elliptical concave structure.

[0011] The beneficial effects obtained by the utility model are as follows:

[0012] Based on the above technical solution, in the high-precision absolute encoder of the present utility model, by installing a thrust ring and a code disk outside the main shaft, and setting anti-eccentric micro-pits on the outer wall of the thrust ring, with an oil film provided in the anti-eccentric micro-pits, the high precision and stability of the encoder are achieved, effectively preventing the eccentric problem of the encoder during operation, and improving the measurement accuracy and service life of the encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. is a structural diagram of the main body of a high-precision absolute encoder proposed by the present utility model;

[0014] Figure 2 FIG. is a structural diagram of the position of the anti-eccentric micro-pits of a high-precision absolute encoder proposed by the present utility model;

[0015] Figure 3 FIG. is a structural diagram of the main body of the anti-eccentric micro-pits of a high-precision absolute encoder proposed by the present utility model;

[0016] Wherein, 1, main shaft; 2, thrust ring; 3, code disk; 301, anti-eccentric micro-pit.

[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0019] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are 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 thus cannot be understood as a limitation to the present utility model.

[0020] Embodiment:

[0021] Please refer to Figures 1-3, A multi-communication interface absolute encoder provided by the utility model includes a main shaft 1. A thrust ring 2 is installed outside the main shaft 1, a code disk 3 is installed outside the thrust ring 2, and anti-eccentric micro-pits 301 are installed on the outer wall of the thrust ring 2; the thrust ring 2 is of an annular structure and is closely attached to the outer surface of the main shaft 1; the inner diameter of the thrust ring 2 is in interference fit with the outer diameter of the main shaft 1; the code disk 3 is fixed on the outer surface of the thrust ring 2 and is coaxially arranged with the main shaft 1; the anti-eccentric micro-pits 301 are evenly distributed on the outer wall of the thrust ring 2; the anti-eccentric micro-pits 301 are circular or elliptical concave structures.

[0022] Working principle:

[0023] There is a certain amount of micro oil film in the anti-eccentric micro-pits 301. According to the following formula:

[0024]

[0025] In the formula: h is the lubricating oil film thickness; η is the lubricating oil viscosity; U is the sliding speed; p is the oil film pressure. It can be seen from the above formula that by changing the value of the oil film thickness and increasing a certain amount of micro-texture, a certain oil film bearing capacity can be provided during the rotation of the code disk, thereby preventing the problem of eccentricity during the rotation of the code disk. By adjusting these parameters (lubricating oil film thickness; lubricating oil viscosity), especially by designing a suitable anti-eccentric micro-pit 301, the thickness of the oil film can provide sufficient bearing capacity, thereby maintaining its stability during the rotation of the code disk 3.

[0026] The oil film in the anti-eccentric micro-pits 301 can reduce the friction between the thrust ring 2 and the main shaft 1, making the rotation smoother, thereby reducing the wear caused by friction. This is crucial for the long-term stability and accuracy of the encoder.

[0027] The oil film not only plays a lubricating role but also provides a certain bearing capacity during the rotation of the code disk 3. This bearing capacity can balance the eccentric moment that may occur during the rotation process, ensuring that the code disk 3 always rotates coaxially with the main shaft 1.

[0028] The shape and distribution of the anti-eccentric micro-pits 301 can be optimized according to actual needs. For example, it can be designed into a circular or elliptical shape to enhance the formation effect of the oil film and improve the anti-eccentric performance.

[0029] By adjusting the depth and shape of the micro-pits, the thickness of the oil film can be precisely controlled, thereby effectively preventing the occurrence of eccentricity problems under various working conditions.

[0030] With this design, the encoder can maintain a stable working state at a relatively high rotational speed, significantly improving the accuracy and service life of the encoder. This anti-eccentric design is particularly suitable for industrial application scenarios that require high precision and high stability, such as automated control systems, robotics, and precision measurement equipment, etc.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0033] The above description of the present invention and its implementation manners is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural modes and embodiments without creative efforts without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A high-precision absolute encoder, characterized in that, It includes a main shaft (1), a thrust ring (2) is installed outside the main shaft (1), a code disk (3) is installed outside the thrust ring (2), and anti-eccentric micro-pits (301) are installed on the outer wall of the thrust ring (2).

2. The high-precision absolute encoder according to claim 1, characterized in that, The thrust ring (2) is of an annular structure and is closely attached to the outer surface of the main shaft (1).

3. The high-precision absolute encoder according to claim 2, wherein The inner diameter of the thrust ring (2) is in interference fit with the outer diameter of the main shaft (1).

4. The high-precision absolute encoder according to claim 1, wherein The code disk (3) is fixed to the outer surface of the thrust ring (2) and is coaxially arranged with the main shaft (1).

5. The high-precision absolute encoder according to any one of claims 1 to 4, characterized in that, The anti-eccentric micro-pits (301) are evenly distributed on the outer wall of the thrust ring (2).

6. The high-precision absolute encoder according to claim 5, wherein, The anti-eccentric micro-pits (301) are circular or oval concave structures.

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