Winch handle switch for controlling positive and negative rotation of motor

Abstract

A winch handle switch for controlling forward and reverse rotation of a motor comprises a button, a cover plate 5, a load component and a shell component, the load component comprises studs, a movable contact piece, a static contact piece and a push block, the studs comprise a long stud, a first short stud, a second short stud and a third short stud, and the static contact piece comprises an upper contact piece, a lower contact piece and a bent contact bridge. The long stud is electrically connected with the upper contact piece, the first short stud and the second short stud are electrically connected with the bent contact bridge, the third short stud is electrically connected with the lower contact piece, the long stud is externally connected with a negative electrode of a power supply, and the third short stud is externally connected with a positive electrode of the power supply. The first short stud and the second short stud are externally connected with the two ends of a motor respectively. The motor can be braked at the moment of power failure of the motor, the effect of sudden stop of the motor during power failure is achieved, the safety risk caused by delayed rotation stopping of the motor is effectively eliminated, and meanwhile the burden of a winch braking system is relieved.

Description

Technical Field

[0001] This invention relates to a handle switch for controlling the switching or on / off of current, and more specifically to a winch handle switch. Background Technology

[0002] A handle switch is an electrical product used to control the supply of power to a line, and to control the switching or on / off of current. It is generally manually controlled to achieve current switching and reversal, and is widely used in electric vehicles, industrial vehicles, and industrial power systems. The winch handle switch is mainly used for manually controlling the rotation of the winch motor. It generally consists of a button, a cover plate, a load component, and a housing component. The housing component includes an upper outer shell, a base, and a lower bottom shell. The load component includes studs, moving contacts, stationary contacts, a push block, a pressure spring, and a return spring. This winch handle switch has four sets of studs (two studs per set, eight studs in total), each connected to the external motor and power supply. When the button is released, the motor is de-energized, but due to the inertia of the motor rotor, it will continue to rotate a few times for a short period before stopping. This results in the motor not being able to brake immediately or stop abruptly. The lack of immediate stopping for other external equipment driven by the motor after power failure poses a safety risk and increases the burden on the winch braking system, failing to meet the requirements of high-end customers. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a winch handle switch that can brake the motor and bring it to an emergency stop when the motor is powered off, thereby controlling the forward and reverse rotation of the motor.

[0004] The objective of this invention is achieved through the following technical solution: a winch handle switch for controlling the forward and reverse rotation of a motor, comprising a button, a cover plate, a load component, and a housing component. The housing component includes an upper outer shell, a base, and a lower bottom shell. The load component includes studs, a moving contact, a stationary contact, a push block, and a pressure spring. The studs include a long stud, a first short stud, a second short stud, and a third short stud. The stationary contact includes an upper contact, a lower contact, and a bent contact bridge. The long stud is electrically connected to the upper contact. The first and second short studs are respectively electrically connected to the bent contact bridge. The third short stud is electrically connected to the lower contact. The long stud is connected to the negative terminal of the power supply. The third short stud is connected to the positive terminal of the power supply. The first and second short studs are respectively connected to the two ends of the motor.

[0005] With this invention, the forward and reverse rotation of the winch motor can be controlled by manually pressing and releasing the left and right buttons respectively. When connecting the motor and power supply using this invention, the negative terminal of the power supply remains connected to the motor when the button is released. At the instant the button is released and the motor is de-energized, the motor generates a reverse electromotive force, creating a short-term reverse current between the motor, the handle switch, and the power supply. Under the action of this short-term current, the motor windings generate magnetic force, producing a reverse rotational force. This force is exactly opposite to the direction in which the motor rotor continues to rotate due to inertia at the instant of power failure, thus braking the motor and achieving an emergency stop. This effectively eliminates the safety risks caused by delayed motor stoppage, reduces the burden on the winch braking system, and protects it. Furthermore, the number of studs is reduced, lowering production costs. Attached Figure Description

[0006] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0007] Figure 1 This is a schematic diagram of the winch handle switch for controlling the forward and reverse rotation of the motor according to the present invention.

[0008] Figure 2 for Figure 1 A bottom view (after removing the bottom shell).

[0009] Figure 3 for Figure 2 FF sectional view.

[0010] Figure 4 This is the circuit schematic diagram of the present invention. Detailed Implementation

[0011] Reference Figures 1 to 4As can be seen, the winch handle switch for controlling the forward and reverse rotation of the motor of the present invention includes a button 1 (including left and right parts), a cover plate 5 (and a plastic guide plate 6), a load component, and a housing component. The housing component includes an upper outer shell 3, a base 10, and a lower bottom shell 16. The load component includes studs, moving contact plates 8 (including left and right parts), stationary contact plates, push blocks 2 (including left and right parts), and a pressure spring 4 (and a return spring 13). The studs include a long stud 14 (C), a first short stud 17 (A), a second short stud 15 (B), and a third short stud 18 (D). The stationary contact includes an upper contact 11, a lower contact 12, and a curved contact bridge 7 (including left and right parts). The long stud 14 is electrically connected to the upper contact 11. The first short stud 17 and the second short stud 15 are electrically connected to the curved contact bridge 7 (including left and right parts), respectively. The third short stud 18 is electrically connected to the lower contact 12. The long stud 14 (C) is connected to the negative terminal of the power supply, and the third short stud 18 (D) is connected to the positive terminal of the power supply. The first short stud 17 (A) and the second short stud 15 (B) are connected to the two ends of the motor, respectively. The upper part of the moving contact 8 is connected to the push block 2 via a pressure spring 4, and the lower part of the push block 2 is connected to the base 10 via a return spring 13.

[0012] Referring to the accompanying drawings, the principle of controlling the forward and reverse rotation of the motor by pressing or releasing button 1 in this invention is as follows: When the long stud 14 (C) and the third short stud 18 (D) are connected to the power supply (DC regulated), the first short stud 17 (A) and the second short stud 15 (B) are connected to the motor, and the finger presses the left button 1 (as shown in the attached drawings). Figure 4 As shown in K1), pushing the left push block 2 causes the left movable contact 8 to descend and connect with the lower contact 12. At this time, the right movable contact 8 is in the upper position and connected with the upper contact 11. At this point, the two bent contact bridges, the two movable contacts, the upper contact, the lower contact, the power supply, and the motor form a current loop, driving the motor to rotate forward. When the finger releases the left button 1, the left push block 2 returns to the upper position under the spring force of the left return spring 13, simultaneously causing the left movable contact and the left button to return to their initial positions. At this time, the left movable contact disconnects from the lower contact and connects to the upper contact, the current loop is broken, and the motor stops rotating. Similarly, pressing the right button (e.g., ...) causes the left movable contact to deviate from the lower contact and connect with the upper contact, thus stopping the current loop and the motor from rotating. Figure 4 As shown in K2, it also forms a current loop to drive the motor to rotate, but the current direction is reversed, so the motor rotates in reverse. In practice, the positive and negative poles of the motor can also be adjusted to meet the needs of the left button controlling the motor to rotate in reverse and the right button controlling the motor to rotate in forward.

[0013] The system uses four studs (including a long stud, a first short stud, a second short stud, and a third short stud) to connect internally to four stationary contacts (including an upper contact, a lower contact, and two bent contact bridges). Externally, the four studs connect to the power supply and the motor, respectively. Manual control of the motor's forward and reverse rotation is achieved by pressing and releasing the left and right buttons. When both buttons are released, the negative terminal of the power supply is connected to the long stud 14(C). At this time, the long stud 14(C) is connected to both the first short stud 17(A) and the second short stud 15(B). The motor is also connected to both the first short stud 17(A) and the second short stud 15(B). Therefore, when the motor is connected to the winch handle switch controlling the motor's forward and reverse rotation, the motor is always negative. This design also reduces the number of studs, lowering production costs and simplifying the wiring process.

Claims

1. A winch handle switch for controlling the forward and reverse rotation of a motor, comprising a button, a cover plate, a load component, and a housing component, wherein the housing component includes an upper outer shell, a base, and a lower bottom shell, and the load component includes a stud, a moving contact, a stationary contact, a push block, and a pressure spring, characterized in that: The studs include a long stud, a first short stud, a second short stud, and a third short stud. The stationary contact includes an upper contact, a lower contact, and a bent contact bridge. The long stud is electrically connected to the upper contact. The first and second short studs are electrically connected to the bent contact bridge, and the third short stud is electrically connected to the lower contact. The long stud is connected to the negative terminal of the power supply, and the third short stud is connected to the positive terminal of the power supply. The first and second short studs are connected to the two ends of the motor, respectively.

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