Push rod control circuit

Abstract

The utility model discloses a push rod control circuit which comprises an input end, a motor, a first wire, a second wire, an induction sheet, a diode D1 and a diode D2, the input end is connected with an external power supply and comprises a first input end and a second input end, the first input end is connected with one end of the motor, and the other end of the motor is connected with one end of the first wire. The second wire comprises a wire A, a wire B and a wire C which are mutually independent, the wire A is connected with the positive electrode of the diode D2, the negative electrode of the diode D2 is connected to the second input end, the wire B is connected with the second input end, the wire C is connected with the negative electrode of the diode D1, and the positive electrode of the diode D2 is connected to the second input end; the other end of the diode D1 is always in contact connection with the wire A or the wire B or the wire C. The two ends of the diode D1 are connected with a first RC circuit in parallel. The two ends of the diode D2 are connected in parallel with a second RC circuit. According to the utility model, the circuit structure is simple, and the stability and reliability in the stroke process are improved.

Description

Technical Field

[0001] This utility model relates to the field of circuits, and in particular to a push rod control circuit. Background Technology

[0002] In existing intelligent linear actuators, the travel control of telescopic rods has multiple control methods. Changing the operating state of the motor and installing limit switches can achieve various travel modes such as automatic stop, reverse movement, or automatic reciprocating movement of the actuator.

[0003] In existing patent ZL2023217861182, a stroke control circuit is proposed, which is equipped with two sensing lines and a sensing plate to control the stroke position during the extension and retraction process. In this technical solution, the diodes F and G will repeatedly conduct or cut off, and under the influence of other noise, the stability of the working state will gradually decrease, affecting the reliability of the circuit.

[0004] Therefore, the applicant has conducted research on this issue and developed and optimized the control circuit, which led to this case. Utility Model Content

[0005] This invention provides a push rod control circuit with a simple structure that improves stability and reliability during the stroke process.

[0006] Specifically, this utility model is achieved through the following technical solution:

[0007] A push rod control circuit includes an input terminal, a motor, a first wire, a second wire, a sensing element, a diode D1, and a diode D2.

[0008] The input terminals are connected to an external power source, including input terminal 1 and input terminal 2; input terminal 1 is connected to one end of the motor, and the other end of the motor is connected to one end of the first wire.

[0009] The second wire consists of three independent wires A, B, and C. Wire A is connected to the positive terminal of diode D2, and the negative terminal of diode D2 is connected to the second input terminal. Wire B is connected to the second input terminal. Wire C is connected to the negative terminal of diode D1, and the positive terminal of diode D2 is connected to the second input terminal.

[0010] When the sensor moves, one end is always in contact with the first wire, and the other end is always in contact with wire A, wire B, or wire C.

[0011] A first RC circuit is connected in parallel across diode D1; a second RC circuit is connected in parallel across diode D2.

[0012] The first RC circuit includes a resistor R1 and a capacitor C1 connected in series. The resistor R1 is connected to the positive terminal of the diode D1, and the capacitor C1 is connected to the negative terminal of the diode D1.

[0013] The resistor R1 is 100R and the capacitor C1 is 100nF.

[0014] The second RC circuit includes a resistor R2 and a capacitor C2 connected in series. The resistor R2 is connected to the negative terminal of the diode D2, and the capacitor C2 is connected to the positive terminal of the diode D2.

[0015] The resistor R2 is 100R and the capacitor C2 is 100nF.

[0016] As the sensing element moves, it connects to three independent wires A, B, and C in the control circuit. When diodes D1 and D2 are frequently turned on and off, the first RC circuit and the second RC circuit effectively protect diodes D1 and D2, extending their service life, ensuring circuit stability, and improving the reliability of the control circuit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the motor in forward rotation working state of this utility model;

[0019] Figure 3 This is a schematic diagram of the motor in reverse operation state of this utility model. Detailed Implementation

[0020] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be more thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0021] In the following description, certain specific details are set forth for the purpose of illustrating various embodiments of the invention to provide a thorough understanding of these embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this disclosure may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0022] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0023] Throughout this specification, references to "one embodiment" or "some embodiments" indicate that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0024] Furthermore, the terms "first," "second," etc., used in the specification and claims are used only for clarity of description to distinguish between different objects, and do not limit the size or other order of the objects they describe.

[0025] A push rod control circuit, such as Figure 1 As shown, the main components or electrical elements involved include the input terminal, motor M, first wire L1, second wire L2, induction plate T, diode D1, and diode D2.

[0026] The main input terminals are external power supplies, including input terminal 1 and input terminal 2. The external power supply connection method depends on the working state and can be either positive or negative. Input terminal 1 is connected to one end of motor M, and the other end of motor M is connected to one end of the first wire L1. The other end of the first wire L1 is disconnected and not connected to any other components.

[0027] The second conductor L2 comprises three independent conductors: conductor A, conductor B, and conductor C. One end of conductor A is connected to the anode of diode D2, and the cathode of diode D2 is connected to input terminal 2. Conductor B is connected to input terminal 2 via a connecting wire. The connecting wire of conductor B can be extended from its end or from the middle of conductor B. For ease of wiring, in this embodiment, it is led out from the middle of conductor B and connected to input terminal 2 together with the cathode of diode D2. One end of conductor C is connected to the cathode of diode D1, and the anode and cathode of diode D2 are connected to input terminal 2 together.

[0028] A first RC circuit is connected in parallel across diode D1. This first RC circuit consists of a resistor R1 and a capacitor C1 connected in series. The resistor R1 is connected to the anode of diode D1, and the capacitor C1 is connected to the cathode of diode D1. A second RC circuit is connected in parallel across diode D2. This second RC circuit consists of a resistor R2 and a capacitor C2 connected in series. The resistor R2 is connected to the cathode of diode D2, and the capacitor C2 is connected to the anode of diode D2. Resistors R1 and R2 are both 100Ω, and capacitors C1 and C2 are both 100nF.

[0029] The sensing element T can be in the form of a metal spring. As the sensing element T moves, one end remains in contact with the first conductor L1, forming an electrical connection. The other end of the sensing element T, during its movement, alternately contacts conductors A, B, and C, but always maintains contact with one of the three independent conductors.

[0030] The mechanical structure of the induction element T can be located on a telescopic component mounted on a push rod. When the motor M is powered on, it can drive the push rod containing the induction element T to move linearly. The specific working process is combined with... Figure 2 and Figure 3 as follows:

[0031] like Figure 2 As shown, when input terminal 1 is connected to the positive terminal and input terminal 2 is connected to the negative terminal, it is a positive connection, and motor M rotates forward. Motor M's forward rotation drives the extension rod of the push rod to extend outward in a linear motion. At this time, the induction plate T mounted on the extension rod moves from wire A to wires B and C. When induction plate T contacts wire A, input terminal 1 is connected to the positive terminal, and current flows out through motor M, through induction plate T and wire A, and then to diode D2, returning to the negative terminal of input terminal 2. This state maintains motor M's continued forward rotation. When induction plate T slides to contact wire B, the current is again output from input terminal 1 (which is also connected to the positive terminal), flowing back through motor M, induction plate T, and wire B to the negative terminal of input terminal 2, and the motor continues to rotate forward. When induction plate T slides to contact wire C, the current flows through motor M, induction plate T, and wire C to diode D1. At this time, diode D1 can be considered to have infinite resistance, and diode D1 is reverse-biased, preventing the motor from continuing to work. The push rod reaches its maximum stroke and stops moving.

[0032] When the push rod retracts, as Figure 3 As shown, the input terminals are reversed, i.e., input terminal 1 is connected to the negative terminal and input terminal 2 is connected to the positive terminal. Motor M reverses direction, and this reverse rotation of motor M mechanically drives the telescopic rod of the push rod to retract inward. The induction plate T mounted on the telescopic rod then moves from wire C towards wires B and A. When induction plate T contacts wire C, current is output from input terminal 2, passes through diode D1 in the forward direction, and flows to wire C, induction plate T, motor M, and the negative terminal of input terminal 1, keeping motor M in reverse rotation. When induction plate T slides to contact wire B, current is output from input terminal 2, passes through wire B to motor M, and finally returns to the negative terminal of input terminal 1, continuing motor M's reverse rotation. When induction plate T slides to contact wire A, current is output from input terminal 2. At this point, diode D2 can be considered to have infinite resistance, and diode D2 is reverse-biased and cut off, conducting diode D1. Current flows through diode D1 to wire C, where it is disconnected, thus power cannot continue to be supplied to motor M, and the telescopic rod stops retracting.

[0033] In this embodiment, resistors R1 and R2 are 100R, and capacitors C1 and C2 are 100nF. Throughout the operation, the first RC circuit connected in parallel with diode D1 and the second RC circuit connected in parallel with diode D2 provide infinite resistance when diodes D1 and D2 are reverse cut off, ensuring the reliability of the circuit and filtering out high-frequency signal noise in the circuit, providing a stable circuit environment.

[0034] Unless otherwise specified in this utility model specification, all of them are conventional techniques in the field.

[0035] The above are preferred embodiments of this utility model. Any other simple substitutions and modifications made under the premise of this utility model concept should be considered as falling within the protection scope of this utility model.

Claims

1. A push rod control circuit, characterized in that: Includes input terminal, motor, first wire, second wire, induction plate, diode D1, and diode D2; The input terminals are connected to an external power source, including input terminal 1 and input terminal 2; input terminal 1 is connected to one end of the motor, and the other end of the motor is connected to one end of the first wire. The second wire consists of three independent wires A, B, and C. Wire A is connected to the positive terminal of diode D2, and the negative terminal of diode D2 is connected to the second input terminal. Wire B is connected to the second input terminal. Wire C is connected to the negative terminal of diode D1, and the positive terminal of diode D2 is connected to the second input terminal. When the sensor moves, one end is always in contact with the first wire, and the other end is always in contact with wire A, wire B, or wire C. A first RC circuit is connected in parallel across diode D1; a second RC circuit is connected in parallel across diode D2.

2. The push rod control circuit as described in claim 1, characterized in that: The first RC circuit includes a resistor R1 and a capacitor C1 connected in series. The resistor R1 is connected to the positive terminal of the diode D1, and the capacitor C1 is connected to the negative terminal of the diode D1.

3. The push rod control circuit as described in claim 2, characterized in that: The resistor R1 is 100R and the capacitor C1 is 100nF.

4. The push rod control circuit as described in claim 1, characterized in that: The second RC circuit includes a resistor R2 and a capacitor C2 connected in series. The resistor R2 is connected to the negative terminal of the diode D2, and the capacitor C2 is connected to the positive terminal of the diode D2.

5. The push rod control circuit as described in claim 4, characterized in that: The resistor R2 is 100R and the capacitor C2 is 100nF.

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