Built-in Hall circuit of push rod motor

Abstract

The utility model discloses a push rod motor built-in Hall circuit which comprises a 12V power supply leading-in end, the 12V power supply leading-in end is electrically connected with the input end of an LDO power supply chip, the output end of the LDO power supply chip is connected with a first resistor in series and then electrically connected with the input ends of two Hall sensors, and the two ends of the first resistor are respectively connected with a second capacitor and a third capacitor in parallel. The second capacitor is connected with the output end of the LDO power supply chip in parallel, the input end of the LDO power supply chip is connected with the first capacitor in parallel, and the two Hall sensors are used for outputting two high-low level signals with the phase difference of 90 degrees by inducing magnetic field changes. Wherein the output end of the first Hall sensor is electrically connected with the SA terminal after being connected in series with the second resistor, and the output end of the second Hall sensor is electrically connected with the SB terminal after being connected in series with the third resistor. Parts related to the built-in circuit are small in space, and the built-in Hall shortens the length of the motor; the push rod motor can be shortened, and installation and use space is reduced.

Description

Technical Field

[0001] The utility model relates to a push rod motor, in particular to a push rod motor circuit on a robot or a drone base station. Background Art

[0002] A push rod motor is a power-driven device that converts the rotational motion of a motor into the linear reciprocating motion of a push rod. It is usually used as an actuator in various simple or complex technological processes to achieve remote control, centralized control, or automatic control. At present, the push rod motor has been widely used due to its outstanding performance advantages. Its typical application fields include: fitness equipment, medical devices, electric furniture, automobiles, electric power, machinery, metallurgy, chemical industry, and construction, etc. In addition, the push rod motor is also used in many smart home scenarios. When limiting the position of the push rod motor, a proximity sensor is often used to sense the telescopic movement of the push rod. The existing push rod motor is relatively long in volume, occupies more installation and use space, and has a relatively high cost.

[0003] The authorized patent No. ZL202122203907.6 with the publication date of March 18, 2022 discloses a push rod motor, which is characterized in that it includes: a housing; a stator fixedly arranged inside the housing; a rotor arranged inside the stator; a worm passing through the central position of the rotor, and a friction ring sleeved at the rear end of the worm, and the friction ring is in interference fit with the worm. The push rod motor adopts a friction ring design, which solves the problems such as large noise and insufficient self-locking force existing in the existing push rod motors during operation, and has a simple structure, is convenient to use, safe and practical, and is especially suitable for the field of electric furniture. However, this push rod motor is relatively long in volume, occupies more installation and use space, and has a relatively high cost. Summary of the Utility Model

[0004] The utility model provides an internal Hall circuit of a push rod motor that can shorten the length of the push rod motor and reduce the installation and use space to solve the current situation that the existing push rod motor is relatively long in volume, occupies more installation and use space, and has a relatively high cost.

[0005] The specific technical solution adopted by the present utility model to solve the above technical problems is as follows: A push rod motor with an internal Hall circuit includes a 12V power supply input terminal, and is characterized in that: the positive pole input terminal of the 12V power supply is electrically connected to the input terminal of the LDO power supply chip. The output terminal of the LDO power supply chip is connected in series with a first resistor and then electrically connected to the input terminals of two Hall sensors. A second capacitor and a third capacitor are respectively connected in parallel at both ends of the first resistor. The second capacitor is connected in parallel with the output terminal of the LDO power supply chip. A first capacitor is connected in parallel at the input terminal of the LDO power supply chip. The two Hall sensors are used to output two high and low level signals with a 90° phase difference by sensing the change of the magnetic field. Among them, the output terminal of the first Hall sensor is connected in series with a second resistor and then electrically connected to the SA terminal, and the output terminal of the second Hall sensor is connected in series with a third resistor and then electrically connected to the SB terminal. The SA terminal and the SB terminal are used to be electrically connected to the position feedback output terminal of the push rod motor. The internal Hall circuit has a simple and effective structure, can shorten the length of the push rod motor, and reduce the installation and use space.

[0006] Preferably, the LDO power supply chip adopts a 5V output power patch chip with the model of PJ75AL33SA. It improves the simplicity, reliability and effectiveness of the 5V output power supply, and reduces the chip occupation space.

[0007] Preferably, the two Hall sensors adopt bipolar Hall sensor chips with the model of SS460S_C3. It improves the simplicity, reliability and effectiveness of the change processing of outputting two high and low level signals with a 90° phase difference by sensing the change of the magnetic field.

[0008] Preferably, a fourth capacitor is connected in parallel at the output terminal of the first Hall sensor, and a fifth capacitor is connected in parallel at the output terminal of the second Hall sensor. It improves the simplicity, stability, reliability and effectiveness of the output level filtering of the Hall sensor.

[0009] Preferably, a varistor is connected in parallel between the S1 terminal and the S2 terminal. The S1 terminal is connected to the W1 terminal, and the S2 terminal is connected to the W2 terminal. The S1 terminal and the S2 terminal are respectively electrically connected to the motor brush braid. A varistor is also added to the circuit, which can effectively reduce the spark of the motor, thereby reducing the electromagnetic induction wave generated by it, and improving the reliability and effectiveness of the service life of the push rod motor. It improves the simplicity and effectiveness of the carbon brush spark absorption treatment of the push rod motor.

[0010] Preferably, the first capacitor, the second capacitor and the third capacitor adopt energy storage capacitors. It improves the simplicity, stability, reliability and effectiveness of the energy storage filtering of the LDO power supply chip and the Hall sensor.

[0011] Preferably, the fourth capacitor and the fifth capacitor adopt filter capacitors. It improves the simplicity, stability, reliability and effectiveness of the output level filtering of the Hall sensor.

[0012] The beneficial effects of the present utility model are as follows: The components involved in the built-in circuit have a small space, and the built-in Hall shortens the length of the motor; the length of the push rod motor can be shortened, and the installation and use space can be reduced. Brief Description of the Drawings

[0013] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0014] Figure 1 It is a schematic diagram of the circuit structure of the built-in Hall circuit of the push rod motor of the present utility model. Specific Embodiments

[0015] Figure 1 In the illustrated embodiment, a built-in Hall circuit for a push rod motor includes a 12V power supply input terminal. The positive electrode VCC of the 12V power supply is electrically connected to the input terminal of the LDO power supply chip U1. The output terminal of the LDO power supply chip U1 is connected in series with the first resistor R1 and then electrically connected to the input terminals of two Hall sensors. The two ends of the first resistor R1 are respectively shunted by the second capacitor C2 and the third capacitor C3. The second capacitor C2 is shunted with the output terminal of the LDO power supply chip U1. The input terminal of the LDO power supply chip is shunted by the first capacitor. The two Hall sensors are used to output two high and low level signals with a phase difference of 90° by sensing the change of the magnetic field. Among them, the output terminal of the first Hall sensor UB1 is connected in series with the second resistor R2 and then electrically connected to the SA terminal. The output terminal of the second Hall sensor UA1 is connected in series with the third resistor R3 and then electrically connected to the SB terminal. The SA terminal and the SB terminal are used to be electrically connected to the position feedback output terminal of the push rod motor. The power supply ground terminals of the LDO power supply chip U1 and the two Hall sensors are both electrically connected to the circuit power supply ground GND terminal. The LDO power supply chip U1 uses a 5V output power surface-mounted chip with the model of PJ75AL33SA. The two Hall sensors (UA1, UB1) use a bipolar Hall sensor chip with the model of SS460S_C3. The output terminal of the first Hall sensor UB1 is shunted by the fourth capacitor C4. The output terminal of the second Hall sensor UA1 is shunted by the fifth capacitor C5. A varistor R4 is shunted between the S1 terminal and the S2 terminal. The S1 terminal is connected to the W1 terminal, and the S2 terminal is connected to the W2 terminal. The S1 terminal and the S2 terminal are respectively electrically connected to the motor brush braid. The first capacitor C1, the second capacitor C2 and the third capacitor C3 use energy storage capacitors. The fourth capacitor C4 and the fifth capacitor C5 use filter capacitors.

[0016] In the push rod motor with built-in Hall circuit of the present utility model, the push rod motor is powered by 12V, which is converted into 5V through an LDO power supply chip to supply power to two Hall sensors. The two Hall sensors output two high and low level signals with a 90° phase difference by sensing the change of the magnetic field; the varistor R4 absorbs the carbon brush sparks; the first capacitor C1 and the second capacitor C2 are used for energy storage and filtering, and the first resistor R1 and the third capacitor C3 form a resistor-capacitor filtering circuit; the fourth capacitor C4 and the second resistor R2 form a resistor-capacitor filtering circuit. The 12V power supply is filtered by the first capacitor C1 and then converted into a 5V power signal by the power supply chip U1 to store energy in the second capacitor C2, and then passes through the resistor-capacitor filtering circuit of the first resistor R1 + the first capacitor C1 to supply power to the two Hall chips UB1 and UA1. The two Hall chips output level signals of 5V and 0V by sensing the change of the magnetic field, and after being filtered by the fourth capacitor C4 and the second resistor R2, they are output to the external MCU. The Hall circuit can output pulse signals, and the frequency of the pulse signals is mainly determined by the number of poles of the magnetic ring; if the customer needs, the circuit output analog signal can be changed.

[0017] The above content and structure describe the basic principle, main features and advantages of the product of the present utility model, which should be understood by those skilled in the art. The examples and descriptions in the above specification only illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A push rod motor built-in Hall circuit includes a 12V power supply input terminal, and is characterized in that: The positive terminal of the 12V power supply is electrically connected to the input terminal of the LDO power supply chip. The output terminal of the LDO power supply chip is electrically connected to the input terminals of two Hall sensors in series with a first resistor. A second capacitor and a third capacitor are respectively connected in parallel across the two ends of the first resistor. The second capacitor is connected in parallel with the output terminal of the LDO power supply chip. A first capacitor is connected in parallel with the input terminal of the LDO power supply chip. The two Hall sensors are used to output two high and low level signals with a 90° phase difference by sensing magnetic field changes. Among them, the output terminal of the first Hall sensor is electrically connected to the SA terminal in series with a second resistor, and the output terminal of the second Hall sensor is electrically connected to the SB terminal in series with a third resistor. The SA terminal and the SB terminal are used to be electrically connected to the position feedback output terminal of the push rod motor.

2. The push rod motor built-in Hall circuit according to claim 1, characterized in that: The LDO power supply chip used is a 5V output power surface mount chip with the model number PJ75AL33SA.

3. The push rod motor built-in Hall circuit according to claim 1, wherein: The two Hall sensors used are bipolar Hall sensor chips with the model number SS460S_C3.

4. The push rod motor built-in Hall circuit according to claim 1, characterized in that: A fourth capacitor is connected in parallel with the output terminal of the first Hall sensor, and a fifth capacitor is connected in parallel with the output terminal of the second Hall sensor.

5. The push rod motor built-in Hall circuit according to claim 1, characterized in that: A varistor is connected in parallel between the S1 terminal and the S2 terminal. The S1 terminal is connected to the W1 terminal, the S2 terminal is connected to the W2 terminal, and the S1 terminal and the S2 terminal are respectively electrically connected to the motor brush pigtail.

6. The push rod motor built-in Hall circuit according to claim 1, characterized in that: The first capacitor, the second capacitor and the third capacitor used are energy storage capacitors.

7. The push rod motor-integrated Hall circuit according to claim 4, characterized in that: The fourth capacitor and the fifth capacitor used are filter capacitors.

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