Encoder for a servo motor

Abstract

The utility model discloses a kind of encoder for servo motor, specifically related to motor encoder technical field, including limit cylinder, regulating and controlling component is provided on the limit cylinder, regulating and controlling component includes the connecting plate of being arranged at the bottom of limit cylinder, and one end of connecting plate is provided with the constraint block for the constraint rotor, the through hole for the rotor installation is opened on the constraint block. The coaxial design of the limit sleeve and the through hole ensures the installation coaxial degree of stator and rotor, reduces the magnetic field induction deviation caused by eccentricity;At the same time, the through hole of constraint block forms stable constraint to rotor, avoids the detection accuracy of hall sensor to be influenced by rotor shaking, further improves the accuracy of signal acquisition.

Description

Technical Field

[0001] This utility model relates to the field of motor encoder technology, and more specifically, to an encoder for servo motors. Background Technology

[0002] An encoder is a device that encodes signals or data and converts them into a signal form that can be used for communication, transmission, and storage. Encoders used in servo motors typically use a combination of photoelectric encoders and rotary code disks to collect signals, or a combination of rotating magnets and magnetic sensor chips to collect signals.

[0003] Among them, the patent with announcement number CN206790299U discloses an encoder for a servo motor, including a reset switch, a base, a main housing, an intelligent controller, a fixing clamp, an encoder, a pin, a base plate, a pressure foot, and a positioning hole. An elastic washer is fixedly installed on the base, and the elastic washer wraps around the outside of the encoder terminal. One end of the encoder terminal is inserted into the inside of the main housing. The encoder terminal is fixed by being wrapped by the terminal housing. The terminal housing is fixedly connected to the base. A fixing mechanism is welded to the edge of the base, and the base is fixedly connected to the main housing by the fixing mechanism.

[0004] When using this structure, the servo motor uses an encoder, and the read / write port is set on the intelligent controller. The edge of the read / write port is flush with the outer shell. The program is read and written through the read / write port. However, this structure is not easy to monitor and control the rotor speed in real time, making the encoding control inconvenient. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an encoder for a servo motor, which aims to solve the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: an encoder for a servo motor, including a limiting cylinder, wherein an adjustment component is provided on the limiting cylinder;

[0007] The control assembly includes a connecting plate disposed at the bottom of the limiting cylinder, and a constraint block for constraining the rotor is disposed at one end of the connecting plate, and the constraint block is provided with a through hole for rotor installation;

[0008] A Hall sensor for rotor speed detection is provided on one side of the through hole, and an encoder body for encoding control is provided on the other side of the Hall sensor.

[0009] Optionally, in one possible implementation, the top end of the limiting cylinder is provided with an upper extension cylinder, the middle part of the upper extension cylinder is provided with a cavity for stator installation, the bottom of the inner wall of the cavity is fixedly provided with a limiting sleeve, the limiting sleeve and the through hole are in the same axial direction, a number of heat dissipation copper blocks are distributed on the outer side of the limiting sleeve, the vertical cross-section of the limiting sleeve is set to a frustum shape, the top of the upper extension cylinder is provided with a docking ring, the docking ring is located on the outer side of the upper extension cylinder, the connecting plate is inserted into the bottom of the limiting cylinder, and one end of the connecting plate is provided with a snap-fit ​​block, the snap-fit ​​block and the limiting cylinder are detachably connected by bolts;

[0010] The technical effects and advantages of this utility model are as follows:

[0011] By integrating the Hall sensor and encoder body into the control component, a unified process of real-time rotor speed detection, instant signal transmission, and encoding control is achieved, which solves the problem of cumbersome operation caused by the separation of speed detection and encoding control in the existing technology, and significantly improves the timeliness and convenience of encoding control.

[0012] The coaxial design of the limiting sleeve and the through hole ensures the coaxiality of the stator and rotor installation, reducing the magnetic field induction deviation caused by eccentricity; at the same time, the through hole of the constraint block forms a stable constraint on the rotor, preventing rotor sway from affecting the detection accuracy of the Hall sensor, and further improving the accuracy of signal acquisition. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0014] Figure 1 This is a front view of the overall structure of this utility model.

[0015] Figure 2 This is a side view of the overall structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the upper extension cylinder, limiting sleeve, docking ring, and heat dissipation copper block of this utility model.

[0017] Figure 4 This is a schematic diagram of the connecting plate, constraint block, Hall sensor, and encoder body of this utility model.

[0018] The attached figures are labeled as follows: 1. Limiting cylinder; 2. Connecting plate; 3. Constraint block; 4. Through hole; 5. Hall sensor; 6. Encoder body; 7. Upper extension cylinder; 8. Limiting sleeve; 9. Heat dissipation copper block; 10. Docking ring; 11. Cavity. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] As attached Figure 1 - Figure 4 The encoder for a servo motor shown here integrates a Hall sensor 5 and an encoder body 6 into a control component set on a limit cylinder 1, thereby realizing an integrated process of real-time rotor speed detection, instant signal transmission, and encoding control. This solves the problem of cumbersome operation caused by the separation of speed detection and encoding control in the prior art, and significantly improves the timeliness and convenience of encoding control. The specific structural settings of the component are as follows.

[0021] The control component includes a connecting plate 2 located at the bottom of the limiting cylinder 1, and a constraint block 3 for constraining the rotor is provided at one end of the connecting plate 2. The constraint block 3 has a through hole 4 for rotor installation.

[0022] A Hall sensor 5 for rotor speed detection is provided on one side of the through hole 4, and an encoder body 6 for encoding control is provided on one side of the Hall sensor 5.

[0023] The top of the limiting cylinder 1 is provided with an upper extension cylinder 7. The middle part of the upper extension cylinder 7 is provided with a cavity 11 for stator installation. The bottom of the inner wall of the cavity 11 is fixedly provided with a limiting sleeve 8. The limiting sleeve 8 and the through hole 4 are in the same axial direction. Several heat dissipation copper blocks 9 are distributed on the outer side of the limiting sleeve 8. The vertical cross-section of the limiting sleeve 8 is set as a frustum shape. The top of the upper extension cylinder 7 is provided with a docking ring 10. The docking ring 10 is located on the outer side of the upper extension cylinder 7. The connecting plate 2 is inserted into the bottom of the limiting cylinder 1, and one end of the connecting plate 2 is provided with a snap-fit ​​block. The snap-fit ​​block is detachably connected to the limiting cylinder 1 by bolts.

[0024] The specific working principle is as follows: during assembly, if... Figure 1 , Figure 3 As shown, the stator of the servo motor is embedded in the cavity 11 of the upper extension cylinder 7, and the limiting sleeve 8 at the bottom of the cavity 11 forms a radial constraint on the stator; at the same time, the motor rotor passes through the through hole 4 of the constraint block 3, as shown. Figure 4Furthermore, the limiting sleeve 8 and the through hole 4 are aligned axially, ensuring the coaxiality of the stator and rotor, thus laying the foundation for the accuracy of subsequent signal acquisition. The docking ring 10 at the top of the upper extension cylinder 7, such as... Figure 3 It can be bolted to the motor housing to fix the encoder to the motor as a whole; the connecting plate 2 is detachably connected to the limiting cylinder 1 through the snap-fit ​​block, which facilitates the installation and calibration of the control components.

[0025] like Figure 4 As shown, when the rotor rotates, the Hall sensor 5 on one side of the through hole 4 uses the Hall effect to sense the rotational speed of the rotor in real time: During the rotation of the rotor, its surface magnetic field or integrated magnet produces periodic changes. The Hall sensor 5 converts the magnetic field changes into electrical signals to accurately capture the rotor's rotational speed parameters. The rotational speed electrical signal collected by the Hall sensor 5 is transmitted to the encoder body 6 on the same side through wires. After receiving the signal, the encoder body 6 completes signal encoding and conversion based on the built-in algorithm to generate coded signals such as pulse signals that can be used for motor control, and transmits them to the motor control system to realize real-time control of the servo motor.

[0026] like Figure 3 As shown, the heat dissipation copper block 9 on the outside of the limiting sleeve 8 directly contacts the stator. The high thermal conductivity of copper allows it to quickly absorb the heat generated by the stator during operation and dissipate it outwards, preventing the performance of electronic components such as the Hall sensor 5 and the encoder body 6 from degrading due to high temperature. The frustum-shaped design of the limiting sleeve 8 can reduce the contact area with the stator and guide the heat to be conducted to the heat dissipation copper block 9, thereby improving the heat dissipation efficiency.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An encoder for a servo motor, comprising a limiting cylinder (1), characterized in that: The limiting cylinder (1) is provided with an adjustment component; The control component includes a connecting plate (2) set at the bottom of the limiting cylinder (1), and a constraint block (3) for constraining the rotor is provided at one end of the connecting plate (2), and a through hole (4) for rotor installation is provided on the constraint block (3). A Hall sensor (5) for rotor speed detection is provided on one side of the through hole (4), and an encoder body (6) for encoding control is provided on one side of the Hall sensor (5).

2. The encoder for a servo motor according to claim 1, characterized in that: The top end of the limiting cylinder (1) is provided with an upper extension cylinder (7), and the middle part of the upper extension cylinder (7) is provided with a cavity (11) for stator installation.

3. The encoder for a servo motor according to claim 2, characterized in that: A limiting sleeve (8) is fixedly provided at the bottom of the inner wall of the cavity (11), and the limiting sleeve (8) and the through hole (4) are on the same axial direction.

4. The encoder for a servo motor according to claim 3, characterized in that: The outer side of the limiting sleeve (8) is provided with several heat dissipation copper blocks (9), and the vertical cross-section of the limiting sleeve (8) is set to a frustum shape.

5. An encoder for a servo motor according to claim 2, characterized in that: The top of the upper extension cylinder (7) is provided with a docking ring (10), which is located on the outside of the upper extension cylinder (7).

6. An encoder for a servo motor according to claim 1, characterized in that: The connecting plate (2) is inserted into the bottom of the limiting cylinder (1), and a snap-fit ​​block is provided at one end of the connecting plate (2). The snap-fit ​​block is detachably connected to the limiting cylinder (1) by bolts.

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