Absolute encoder of electric actuator

Abstract

The utility model relates to the technical field of encoders, in particular to an absolute encoder of an electric actuator. The device comprises a top cover and a rubber suction cup, a bottom frame is detachably arranged on the top cover, encoding assemblies are arranged on the top cover and the bottom frame, a plurality of fixing blades are annularly and rotationally arranged on the bottom frame, fixing channels are formed in the fixing blades, and the bottom frame is provided with a threaded groove formed in the annular direction; a plurality of rubber suckers are annularly arranged on the bottom frame in a communicated mode, a sliding frame is arranged on the bottom frame and the rubber suckers in a sliding and sealing mode, and a lifting rotary ring is in threaded connection with the threaded groove and rotationally connected with the sliding frame. According to the utility model, the absolute encoder is preliminarily fixed on the rotating assembly through the fixing blade, and then the number of connection points of the absolute encoder and the rotating assembly is increased through the plurality of rubber suckers, so that the stability of connection between the rotating assembly and the absolute encoder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of encoders, in particular to an absolute encoder for an electric actuator. Background Art

[0002] In the electric actuator industry, encoders are the "eyes" of the actuator. They require high precision and are mainly responsible for the precise transmission of signals. They are subject to small forces and are space-constrained for electric actuators used in ships. Therefore, the actuator accessories must be lightweight and have a small and compact structure to achieve a larger single-stage speed ratio (10 to 100) within a certain space.

[0003] Chinese patent publication number CN219798379U discloses a stable absolute encoder, which relates to the field of encoder technology. The encoder comprises a base, with a drive motor mounted on both the front and back sides of the base. A lead screw is mounted on the motor shaft of the drive motor, and a locking plate is built into a plate slot, with a threaded groove formed in the inner wall of the locking plate. This technical solution allows the encoder to be docked between the mounting plate and the mounting slot, facilitating rapid installation and removal of the encoder during installation. Furthermore, a positioning rod is built into the mounting slot to ensure stable installation and greatly enhance the convenience of encoder operation.

[0004] However, the above technical solution has the following shortcomings: when installing the absolute encoder, the small absolute encoder will be connected to the rotating device, and there is no corresponding connection between the absolute encoder and the rotating component set on the device, which can easily cause the rotating component to detach from the absolute encoder during rotation. Utility Model Content

[0005] The purpose of the utility model is to address the problems existing in the background technology and propose an absolute encoder for an electric actuator, which uses a fixed leaf to initially fix the absolute encoder on the rotating component, and then uses multiple rubber suction cups to increase the connection points between the absolute encoder and the rotating component, thereby increasing the stability of the connection between the rotating component and the absolute encoder.

[0006] The technical solution of the utility model is an absolute encoder for an electric actuator, comprising: a top cover, on which a base frame is detachably provided, an encoding assembly is provided on the top cover and the base frame, a plurality of fixed leaves are provided on the base frame for rotation along a ring, the plurality of fixed leaves each have a fixed channel, and the base frame has a threaded groove provided along a ring; a plurality of rubber suction cups are provided on the base frame for communication along a ring, a sliding frame is provided on the base frame and the rubber suction cup for sliding sealing, a lifting ring is threadedly connected to the threaded groove, and the lifting ring is rotatably connected to the sliding frame.

[0007] Preferably, a fixed disk is rotatably provided on the base frame, a plurality of balls are arranged to roll along a ring between the base frame and the fixed disk, and a receiving roller is coaxially provided on the fixed disk.

[0008] Preferably, the encoding assembly includes a battery and a circuit board arranged on the top cover, an optical signal receiver and an LED light bar arranged on the circuit board, a refracting roller coaxially arranged on the receiving roller, and a rotary encoder disk coaxially arranged on the refracting roller.

[0009] Preferably, the refraction roller comprises a glass block portion and a refraction block portion which are staggered in multiple layers, and a mounting ring portion which is annularly arranged on the glass block portion, and the mounting ring portion is coaxially connected to the rotary encoder disk.

[0010] Preferably, the rotary encoder disc comprises a rotary encoder disc body, and a plurality of refractive rings coaxially arranged on the rotary encoder disc body, wherein the diameters and heights of the plurality of refractive rings gradually decrease as the distance from the refractive roller gradually decreases.

[0011] Preferably, the outer peripheral surface of the lifting ring is provided with a plurality of arc grooves along the ring shape.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects:

[0013] When the utility model is used, the worker first fixes the fixed leaf on the rotating component with a bolt through the fixing channel, and at the same time, multiple rubber suction cups abut against the rotating component at the same time, rotate the lifting ring to move in the direction away from the base frame, and then the lifting ring pulls the sliding frame to rise. During the rising process of the sliding frame, the space between the rubber suction cup and the rotating component becomes larger, and the air density decreases. Under the action of pressure, the rubber suction cup is adsorbed on the rotating component, thereby increasing the connection points between the absolute encoder and the rotating component while reducing the volume of the absolute encoder, thereby improving the stability of the absolute encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the top cover and its internal structure in an embodiment of the present utility model;

[0016] Figure 3 This is a schematic diagram of the chassis and its internal structure in an embodiment of the present utility model;

[0017] Figure 4 2 is a cross-sectional view of the rotary encoder disk and the refraction roller in an embodiment of the present invention.

[0018] Figure numerals: 1. top cover; 2. bottom frame; 21. threaded groove; 3. battery; 4. circuit board; 5. optical signal receiver; 6. LED light bar; 7. fixed leaf; 8. fixed disk; 9. ball bearing; 10. receiving roller; 11. rotary encoder disk; 111. rotary encoder disk body; 112. refraction ring; 12. refraction roller; 121. glass block; 122. refraction block; 123. mounting ring; 13. lifting ring; 14. sliding frame; 15. rubber suction cup. DETAILED DESCRIPTION

[0019] Example 1

[0020] like Figures 1-4 As shown, the absolute encoder for an electric actuator proposed in this embodiment includes a top cover 1 and a rubber suction cup 15. The top cover 1 is detachably provided with a base frame 2. The top cover 1 and the base frame 2 are provided with an encoding assembly. The top cover 1 is provided with a data cable electrically connected to the encoding assembly. The base frame 2 is provided with multiple fixed leaves 7 rotatably arranged along a ring. The multiple fixed leaves 7 each have a fixed channel. The base frame 2 has a threaded groove 21 arranged along a ring. Multiple rubber suction cups 15 are provided in a ring-shaped manner on the base frame 2. A sliding frame 14 is provided on the base frame 2 and the rubber suction cup 15 for sliding sealing. A lifting ring 13 is threadedly connected to the threaded groove 21, and the lifting ring 13 is rotatably connected to the sliding frame 14. The outer circumferential surface of the lifting ring 13 is provided with multiple arc grooves along the ring.

[0021] When using this embodiment, the worker first fixes the fixed leaf 7 to the rotating assembly with bolts through the fixing channel. At the same time, multiple rubber suction cups 15 are simultaneously abutted against the rotating assembly, and the lifting ring 13 is rotated to move in the direction away from the base frame 2. Then, the lifting ring 13 pulls the sliding frame 14 to rise. During the rising process of the sliding frame 14, the space between the rubber suction cup 15 and the rotating assembly becomes larger and the air density decreases. Under the action of pressure, the rubber suction cup 15 is adsorbed on the rotating assembly, thereby increasing the connection points between the absolute encoder and the rotating assembly while reducing the volume of the absolute encoder, thereby improving the stability of the absolute encoder.

[0022] Example 2

[0023] like Figure 1 、 Figure 3 and Figure 4 As shown, the absolute encoder of an electric actuator proposed in this embodiment is compared with the first embodiment. In this embodiment, a fixed disk 8 is rotatably arranged on the base frame 2, a plurality of balls 9 are arranged along a ring-shaped rolling pattern between the base frame 2 and the fixed disk 8, and a receiving roller 10 is coaxially arranged on the fixed disk 8.

[0024] The encoding assembly includes a battery 3 and a circuit board 4 arranged on the top cover 1, an optical signal receiver 5 and an LED light bar 6 arranged on the circuit board 4, a refraction roller 12 coaxially arranged on the receiving roller 10, and a rotary encoder disk 11 coaxially arranged on the refraction roller 12.

[0025] When this embodiment is in use, the receiving roller 10 is connected to the rotating component, and the rotating component drives the refraction roller 12 and the rotary encoder disk 11 to rotate through the receiving roller 10. The LED light strip 6 on the circuit board 4 emits multiple side-by-side light rays, and then the light rays are refracted by the rotary encoder disk 11 and the refraction roller 12 and received by the optical signal receiver 5. At the same time, multiple balls 9 reduce the friction when the receiving roller 10 rotates, thereby improving the detection accuracy of the encoder.

[0026] Example 3

[0027] like Figure 3 and Figure 4 As shown, the present embodiment proposes an absolute encoder for an electric actuator. Compared with the first embodiment, in the present embodiment, the refraction roller 12 includes a glass block portion 121 and a refraction block portion 122 arranged in multiple layers in an alternating manner, and a mounting ring portion 123 arranged in a ring shape on the glass block portion 121. The mounting ring portion 123 is coaxially connected to the rotary encoder disk 11.

[0028] The rotary encoder disk 11 includes a rotary encoder disk body 111 and a plurality of refractive ring portions 112 coaxially arranged on the rotary encoder disk body 111. The diameters and heights of the plurality of refractive ring portions 112 gradually decrease as the distance from the refractive roller 12 gradually decreases. The refractive surfaces of the refractive ring portions 112 and the refractive block portions 122 are both 45 degrees, so as to avoid poor encoder detection accuracy caused by light deviation.

[0029] When this embodiment is used, the light emitted by the LED light bar 6 will first pass through the rotary encoder disk body 111 and hit the refraction ring portion 112. The light will then be refracted a second time by the refraction ring portion 112 and the refraction block portion 122, allowing the light to re-irradiate the optical signal receiver on the circuit board 4 to ensure the accuracy of the absolute encoder signal.

[0030] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. An absolute encoder for an electric actuator, characterized in that: include: A top cover (1) is detachably provided with a base frame (2), a coding assembly is provided on the top cover (1) and the base frame (2), a plurality of fixed leaves (7) are provided on the base frame (2) for rotation along a ring, each of the plurality of fixed leaves (7) has a fixed channel, and the base frame (2) has a threaded groove (21) provided along a ring; A plurality of rubber suction cups (15) are connected and arranged on a base frame (2) along a ring shape. A sliding frame (14) is provided on the base frame (2) and the rubber suction cups (15) in a sliding and sealing manner. A lifting ring (13) is threadedly connected to the thread groove (21). The lifting ring (13) is rotatably connected to the sliding frame (14).

2. The absolute encoder for an electric actuator according to claim 1, characterized in that: A fixed disk (8) is rotatably arranged on the base frame (2), a plurality of balls (9) are arranged in a circular manner between the base frame (2) and the fixed disk (8), and a receiving roller (10) is coaxially arranged on the fixed disk (8).

3. The absolute encoder for an electric actuator according to claim 2, characterized in that: The encoding assembly comprises a battery (3) and a circuit board (4) arranged on a top cover (1), an optical signal receiver (5) and an LED light bar (6) arranged on the circuit board (4), a refraction roller (12) coaxially arranged on a receiving roller (10), and a rotary encoder disk (11) coaxially arranged on the refraction roller (12).

4. The absolute encoder for an electric actuator according to claim 3, characterized in that: The refraction roller (12) comprises a glass block portion (121) and a refraction block portion (122) arranged in multiple layers in an alternating manner, and a mounting ring portion (123) arranged in an annular shape on the glass block portion (121). The mounting ring portion (123) is coaxially connected to the rotary encoder disk (11).

5. The absolute encoder for an electric actuator according to claim 3, characterized in that: The rotary encoder disc (11) comprises a rotary encoder disc body (111), and a plurality of refractive ring parts (112) coaxially arranged on the rotary encoder disc body (111), wherein the diameter and height of the plurality of refractive ring parts (112) gradually decrease as the distance between the refractive ring parts (112) and the refractive roller (12) gradually decreases.

6. The absolute encoder for an electric actuator according to claim 1, characterized in that: The outer peripheral surface of the lifting ring (13) is provided with a plurality of arc grooves along the ring shape.

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