Self-cleaning encoder
By setting up a fan blade module on the encoder's moving disk, the rotation of the moving disk generates airflow to clean up the internal dirt, solving the problem of fault caused by dirt by the photoelectric encoder, realizing the self-cleaning function of the encoder, reducing the failure rate.
Patent Information
- Application Number
- CN202422232507.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-12
AI Technical Summary
During use, existing photoelectric encoders are susceptible to internal dirt, resulting in poor sealing properties, external dirt entering, and internal debris and dust will also affect the normal operation of the encoder and lead to failure.
A self-cleaning encoder is designed. By setting a fan blade module on the moving disk, the rotation of the moving disk generates airflow to clean up the dirty inside the encoder. The fan blade module is installed coaxially with the moving disk, rotates synchronously with the moving disk, and blows the airflow into the gap between the static disk and the moving disk through the second air duct to clean up the internal dirt.
Through the self-cleaning encoder design, the failure rate of the encoder can be effectively reduced, the internal clean state of the encoder can be kept, and the normal operation of the encoder can be ensured.
Smart Images
Figure CN223021279U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of electromechanical products, and particularly to a self-cleaning encoder. Background Art
[0002] An encoder is one of the core components of a servo motor, and an optoelectronic encoder is one of the mainstream encoders. During the use of an optoelectronic encoder, there are high requirements for the cleanliness of the internal environment of the encoder. When the internal environment of the encoder becomes dirty, it will cause encoder failures.
[0003] Current optoelectronic encoders mainly perform a sealing treatment on the encoder to prevent external dust, impurities and other dirt from entering the inside of the encoder.
[0004] However, such isolation has the following problems:
[0005] The sealing is insufficient, resulting in external dirt entering the inside of the encoder;
[0006] During the operation of the encoder, the sealing changes, resulting in a deterioration of the encoder's sealing performance;
[0007] Inside the encoder, during operation, dirt such as debris, dust, and impurities are generated, such as foreign objects on the static disk falling off during operation;
[0008] There are originally dust, impurities and other dirt inside the encoder, which fall onto the code disk during operation;
[0009] The above situations will all cause damage to the internal working environment of the optoelectronic encoder, resulting in encoder alarms and affecting the normal operation of the encoder. Summary of the Invention
[0010] This application provides a self-cleaning encoder, which has the advantage of being able to clean the dirt generated inside the encoder, thereby reducing the failure rate of the encoder.
[0011] The technical solution of this application is as follows: A self-cleaning encoder includes a static disk and a moving disk, and there is a gap between the static disk and the moving disk. A fan blade module is provided on the moving disk; the fan blade module is coaxially installed with the moving disk and rotates synchronously with the moving disk. A second air duct is provided on the moving disk, and the second air duct is in the shape of a hole or a groove.
[0012] Further, the encoder further includes an optoelectronic module installed on the static disk. Defining the distance from the optoelectronic module to the center line of the moving disk as the recognition radius, the radius of the fan blade module is smaller than the recognition radius of the optoelectronic module.
[0013] Further, the fan blade module includes a mounting portion and a plurality of fan blades provided on the mounting portion. The fan blades are double-curved fan blades, and the two sides of the axial line of the fan blades are centrally symmetric arc-shaped fan surfaces.
[0014] Further, the installation part is fixedly installed on the rotating shaft of the moving disk or fixedly installed on the moving disk.
[0015] Further, the encoder further includes a housing which is hermetically installed, and the moving disk, the static disk and the fan blade module are all arranged inside the housing.
[0016] In summary, the beneficial effects of the present application are as follows: By arranging a fan blade module on the moving disk of the encoder, air flow is generated following the rotation of the moving disk, which is used to clean the dirt generated inside the encoder and reduce the failure rate of the encoder. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic structural diagram of the encoder in the first embodiment of the present application;
[0018] Figure 2 is a schematic structural diagram of the encoder in the second embodiment of the present application;
[0019] Figure 3 is a schematic diagram of the fan blade module in the second embodiment of the present application;
[0020] Figure 4 is a schematic diagram of the double-curved fan blade in the second embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The following will describe in detail the specific embodiments of the present application with reference to the drawings.
[0022] Embodiment 1: Referring to Figure 1 , a self-cleaning encoder includes a static disk, a moving disk and a wind generation module. There is a gap space B between the static disk and the moving disk. An optoelectronic module A is provided on the static disk, and the wind generation module is used to generate air flow and blow it towards the gap B between the static disk and the moving disk.
[0023] In this embodiment, the wind generation module is a fan module C provided on the static disk. A first air duct is provided at a position corresponding to the fan module C on the static disk, and the first air duct is a hole-shaped or groove-shaped or tubular channel.
[0024] The fan module described in this embodiment is a fan assembly including a frame, blades, a motor and a power cord, and it can work after being powered on.
[0025] The encoder further includes a controller, and the fan module is connected to the controller and controlled by the controller. The controller can directly control the fan module C, or control the fan module C through a control circuit. As an example, a relay or a solid-state electronic relay or a switching tube is provided on the power supply side of the fan module C, and the encoder controller realizes the control of the fan module by controlling the relay or the solid-state electronic relay or the switching tube.
[0026] The control method of the controller for the fan module is as follows:
[0027] When the encoder is initialized, the fan module is controlled to start and work for a period of time;
[0028] When the encoder detects a dirt problem, the fan module is controlled to start and work for a period of time. The detection of the dirt problem is obtained through the detection signal of the photoelectric module. When there is dirt inside the encoder, the dirt will block the light, resulting in an abnormal detection signal of the photoelectric module, such as being unable to detect the optical signal, or the optical signal being weak, or the interval period of the optical signal being abnormal. By analyzing the detection signal of the photoelectric module, it can be determined that there is dirt inside the encoder.
[0029] The above method of the controller is implemented through the control instructions executed by the controller, and the working time of the fan module is preset.
[0030] Specifically, when the encoder is initially started, the encoder is initialized. In this stage, the fan module is started once to ensure the cleanliness of space B;
[0031] When the encoder is working normally and detects a dirt problem, at this time, while the encoder enables the filtering program, the fan module is started to ensure the cleanliness of space B during the operation process.
[0032] The encoder further includes a housing. Similar to the prior art, in this embodiment, the outer shell is still installed in a sealed manner. The moving disk, the static disk, and the wind generation module are all arranged inside the housing.
[0033] Embodiment 2: Refer to Figures 2 - 4 , an encoder capable of solving the internal dirt of the optical encoder, including a static disk, a moving disk, and a wind generation module. There is a gap space B between the static disk and the moving disk. The static disk is provided with a photoelectric module A, and the wind generation module is used to generate an air flow blowing towards the gap B between the static disk and the moving disk.
[0034] In this embodiment, the wind generation module is a fan blade module D arranged on the moving disk. The fan blade module D includes a mounting portion and a plurality of fan blades arranged on the mounting portion.
[0035] The fan blade module D is coaxially installed with the moving disk and rotates synchronously with the moving disk. The moving disk is provided with a second air duct, and the second air duct is in a hole shape or a groove shape.
[0036] The mounting portion is fixedly installed on the rotating shaft of the moving disk or fixedly installed on the moving disk.
[0037] As an example, in a specific embodiment, the moving disk is installed on the rotating shaft by screws, then the fan blade module is also installed in the installation area P by screws.
[0038] As an example, in a specific embodiment, the moving disk is mounted on the rotating shaft by means of side-mounted screws, and the fan blade module is mounted in the installation area P by means of gluing.
[0039] As an example, in a specific embodiment, the moving disk is mounted on the rotating shaft by means of press-fitting, and the fan blade module is also mounted in the installation area P by means of press-fitting.
[0040] It can be understood that the second air duct is located at the installation area P.
[0041] Define the distance between the optoelectronic module A and the center line of the moving disk as the recognition radius. The radius of the fan blade module is smaller than the recognition radius of the optoelectronic module to avoid the influence of the fan blade on the optoelectronic module.
[0042] In some other specific embodiments, considering that the motor connected to the encoder has forward and reverse rotations, the fan blade is designed as a double-curved fan blade, such as Figure 4 , the two sides of the axial line of the fan blade are centrally symmetric arc-shaped fan surfaces. The axial line of the fan blade is the axis perpendicular to the fan blade rotating shaft and passing through the centroid of the fan blade. Regardless of the forward or reverse rotation of the fan blade, it has the same working efficiency and can generate airflows in the same direction. Ensure that the air in the B space can be driven to flow when the fan blade rotates forward and backward, thereby improving the cleanliness of the encoder cavity, especially on the moving disk of the encoder.
[0043] The encoder further includes a housing. Similar to the prior art, in this embodiment, the outer shell is still sealed and installed. The moving disk, the static disk and the wind generation module are all arranged in the housing.
[0044] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the creative concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.
Claims
1. A self-cleaning encoder, characterized in that: It includes a static disk and a dynamic disk, with a gap between the static disk and the dynamic disk, and a fan blade module is arranged on the dynamic disk; the fan blade module is coaxially installed with the dynamic disk and rotates synchronously with the dynamic disk, and a second air duct is arranged on the dynamic disk, and the second air duct is hole-shaped or slot-shaped.
2. The self-cleaning encoder according to claim 1, characterized in that: The encoder further comprises a photoelectric module mounted on the stationary disk, the distance between the photoelectric module and the center line of the moving disk is defined as an identification radius, and the radius of the fan blade module is smaller than the identification radius of the photoelectric module.
3. The self-cleaning encoder according to claim 1, characterized in that The fan blade module includes a mounting portion and a plurality of fan blades arranged on the mounting portion. The fan blades are double-arc fan blades, and both sides of the axial line of the fan blades are centrally symmetrical arc-shaped fan surfaces.
4. The self-cleaning encoder according to claim 3, characterized in that: The mounting portion is fixedly mounted on the rotating shaft of the moving disk or fixedly mounted on the moving disk.
5. The self-cleaning encoder according to claim 1, characterized in that: The encoder further comprises a housing, which is sealed and installed, and the moving disc, the static disc and the fan blade module are all arranged in the housing.