Encoder

Abstract

The invention discloses an encoder, which comprises a static disc, a movable disc and a wind generation module, and is characterized in that the wind generation module is used for generating airflow to blow to a gap between the static disc and the movable disc. In one specific scheme, the wind generating module is a fan module arranged on the static disc; in another specific scheme, the wind generating module is a fan blade module arranged on the movable disc. The air flow generated by the wind generation module is blown to the gap between the static disc and the movable disc, dirt generated in the encoder can be effectively removed, and therefore the fault rate of the encoder is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electromechanical products, and in particular to an encoder. Background Art

[0002] The encoder is one of the core components of the servo motor, and the photoelectric encoder is one of the mainstream encoders. The photoelectric encoder has very high requirements for the cleanliness of the internal environment of the encoder during use. When the internal environment of the encoder is dirty, it will cause the encoder to malfunction.

[0003] The current photoelectric encoder is mainly sealed to prevent external dust, impurities and other dirt from entering the interior of the encoder.

[0004] However, such isolation has the following problems: The seal is not good enough, causing external dirt to enter the encoder; During the operation of the encoder, the sealing changes, resulting in the deterioration of the sealing performance of the encoder; During operation, debris, dust, impurities and other dirt are generated inside the encoder, such as foreign matter falling off the stator during operation; There is dust, impurities and other dirt inside the encoder, which falls onto the code disc during operation; The above situations will cause the internal working environment of the photoelectric encoder to be damaged, thereby generating encoder alarms and affecting the normal operation of the encoder. Summary of the invention

[0005] The present application provides an encoder, which has the advantage of being able to clean dirt generated inside the encoder, thereby reducing the failure rate of the encoder.

[0006] The technical solution of the present application is as follows: an encoder includes a static disk, a dynamic disk and a wind generating module, wherein the wind generating module is used to generate an airflow to blow toward the gap between the static disk and the dynamic disk.

[0007] Furthermore, the wind generating module is a fan module arranged on the stator disk.

[0008] Furthermore, a first air duct is provided on the stator disk at a position corresponding to the fan module, and the first air duct is a hole-shaped, groove-shaped or tube-shaped channel.

[0009] Furthermore, the encoder also includes a controller, and the fan module is connected to the controller and controlled by the controller.

[0010] Furthermore, the controller controls the fan module in the following manner: When the encoder is initialized, the control fan module starts and works for a period of time; When the encoder detects a dirt problem, the fan module is controlled to start and work for a period of time.

[0011] Furthermore, the wind generating module is a fan blade module arranged on the moving disk.

[0012] Furthermore, the fan blade module is installed coaxially with the moving disk, and 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.

[0013] Furthermore, the encoder also includes a photoelectric module installed on the static disk, and the distance between the photoelectric module and the center line of the dynamic disk is defined as the recognition radius. The radius of the fan blade module is smaller than the recognition radius of the photoelectric module.

[0014] Furthermore, 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 fan surfaces.

[0015] Furthermore, the encoder also includes a shell, which is sealed and installed, and the moving disk, the static disk and the wind generating module are all arranged in the shell.

[0016] In summary, the beneficial effects of this application are: 1. This application sets a fan module on the encoder static disk to blow air to clean the encoder when dirt is generated inside, remove the dirt, solve the alarm problem of the encoder, and enable the encoder to resume normal work, thereby reducing the failure rate of the encoder; 2. This application provides a fan blade module on the encoder moving disk, which rotates with the moving disk to generate airflow, 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 diagram of the structure of the encoder in Embodiment 1 of the present application; Figure 2 is a schematic diagram of the structure of the encoder in the second embodiment of the present application; Figure 3 This is a schematic diagram of the fan blade module in the second embodiment of the present application; Figure 4 This is a schematic diagram of the double-arc fan blade in Example 2 of the present application. DETAILED DESCRIPTION

[0018] The specific implementation of the present application is described in detail below with reference to the accompanying drawings.

[0019] Example 1: Reference Figure 1An encoder includes a static disk, a dynamic disk and a wind generating module. There is a gap space B between the static disk and the dynamic disk. A photoelectric module A is provided on the static disk. The wind generating module is used to generate an airflow to blow toward the gap B between the static disk and the dynamic disk.

[0020] In this embodiment, the wind generating module is a fan module C disposed on the stator disk. A first air duct is disposed at a position on the stator disk corresponding to the fan module C. The first air duct is a hole-shaped, groove-shaped or tubular channel.

[0021] The fan module described in this embodiment is a fan assembly including a frame, blades, a motor and a power cord, and can work after being powered on.

[0022] The encoder also 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 switch tube is provided on the power supply side of the fan module C, and the encoder controller controls the fan module by controlling the relay or the solid-state electronic relay or the switch tube.

[0023] The controller controls the fan module in the following way: When the encoder is initialized, the control fan module starts and works for a period of time; When the encoder detects a contamination problem, the fan module is controlled to start and work for a period of time. The detection of the contamination problem is obtained through the detection signal of the photoelectric module. When there is contamination inside the encoder, the contamination will block the light, causing the signal detected by the photoelectric module to be abnormal, such as the inability to detect the light signal or the light signal is weak or the light signal interval period is abnormal. By analyzing the detection signal of the photoelectric module, it can be determined that there is contamination inside the encoder.

[0024] The above method of the controller is implemented through control instructions executed by the controller, and the time for the fan module to start working is preset.

[0025] Specifically, when the encoder is initially started, the encoder is initialized. During this stage, the fan module is started once to ensure the cleanliness of space B; When the encoder works normally and identifies a dirt problem, the encoder starts the fan module while enabling the filtering program to ensure the cleanliness of space B during operation.

[0026] The encoder further comprises a housing, and similar to the prior art, in this embodiment, the housing is still installed in a sealed manner. The moving disc, the static disc and the wind generating module are all arranged in the housing.

[0027] Example 2: Reference Figure 2-4An encoder includes a static disk, a dynamic disk and a wind generating module. There is a gap space B between the static disk and the dynamic disk. A photoelectric module A is provided on the static disk. The wind generating module is used to generate an airflow to blow toward the gap B between the static disk and the dynamic disk.

[0028] In this embodiment, the wind generating 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.

[0029] The fan blade module D is installed coaxially with the moving disk and rotates synchronously with the moving disk. The moving disk is provided with a second air duct, which is in the shape of a hole or a groove.

[0030] The mounting portion is fixedly mounted on the rotating shaft of the moving disk or fixedly mounted on the moving disk.

[0031] As an example, in a specific embodiment, the moving disk is mounted on the rotating shaft by means of screws, and the fan blade module is also mounted on the mounting area P by means of screws.

[0032] 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 on the mounting area P by means of gluing.

[0033] As an example, in a specific embodiment, the moving disk is installed on the rotating shaft by press-fitting, and the fan blade module is also installed in the installation area P by press-fitting.

[0034] It can be understood that the second air duct is located at the installation area P.

[0035] The distance between the photoelectric module A and the center line of the moving disk is defined as the identification radius. The radius of the fan blade module is smaller than the identification radius of the photoelectric module to avoid the influence of the fan blade on the photoelectric module.

[0036] In some other specific embodiments, considering that the motor connected to the encoder has forward and reverse rotation, the fan blade is designed as a double-arc fan blade, such as Figure 4 The two sides of the fan blade axial line are arc-shaped fan surfaces that are symmetrical in center. The fan blade axial line is an axis that is perpendicular to the fan blade rotation axis and passes through the fan blade's center of mass. Regardless of whether the fan blade is rotating forward or reverse, it has the same working effectiveness and can generate airflow in the same direction. It is ensured that the fan blade can drive the air flow in space B when rotating forward or reverse, thereby improving the cleanliness of the encoder cavity, especially the encoder moving disk.

[0037] The encoder further comprises a housing, and similar to the prior art, in this embodiment, the housing is still installed in a sealed manner. The moving disc, the static disc and the wind generating module are all arranged in the housing.

[0038] The above is only a preferred implementation of the present application. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present application, and these all fall within the scope of protection of the present application.

Claims

1. An encoder, characterized in that: The invention comprises a static disk, a dynamic disk and a wind generating module, wherein the wind generating module is used for generating an airflow to blow toward the gap between the static disk and the dynamic disk.

2. The encoder according to claim 1, characterized in that The wind generating module is a fan module arranged on the static disk.

3. The encoder according to claim 2, characterized in that A first air duct is provided on the static disk at a position corresponding to the fan module, and the first air duct is a hole-shaped, groove-shaped or tube-shaped channel.

4. The encoder according to claim 2, characterized in that The encoder further comprises a controller, and the fan module is connected to the controller and controlled by the controller.

5. The encoder according to claim 4, characterized in that The controller controls the fan module in the following way: When the encoder is initialized, the control fan module starts and works for a period of time; When the encoder detects a dirt problem, the fan module is controlled to start and work for a period of time.

6. The encoder according to claim 1, characterized in that The wind generating module is a fan blade module arranged on the moving disk.

7. The encoder according to claim 6, characterized in that The fan blade module is coaxially installed 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.

8. The encoder according to claim 7, 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.

9. The encoder according to claim 7, 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.

10. The encoder according to any one of claims 1 to 9, characterized in that: The encoder further comprises a housing, which is sealed and installed, and the moving disc, the static disc and the wind generating module are all arranged in the housing.

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