A mechanical power-off holding relay

Abstract

The present invention discloses a mechanical power-off holding relay, which is characterized in that it includes an electrical and power-off holding mechanism arranged inside the relay, as well as external contacts and coil terminals, wherein the first end of the main push rod is arranged in the relay housing, the second end of the main push rod is outside the relay housing, and a movable connection contact is arranged on the top of the second end of the main push rod, and the movable connection contact is moved to contact with the normally open contact and the normally closed contact; the main coil, the main spring and the main armature are arranged on the main push rod part; the first end of the Z-shaped retaining frame is clamped on the main push rod, and the second end of the Z-shaped retaining frame is connected to the first end of the reset push rod; the second end of the reset push rod is outside the relay housing; the auxiliary coil, the auxiliary spring and the auxiliary armature are arranged on the reset push rod part; the present invention adopts a relay holding mechanism, and utilizes the connection relationship between the auxiliary coil and the auxiliary push rod and the Z-shaped frame, and the relay is reset by energizing the auxiliary coil or manually pressing the reset rod, the Z-shaped frame and the main push rod boss to disengage.

Description

Technical Field

[0001] The invention relates to the research field of relays, and in particular to a mechanical power-off holding relay. Background Art

[0002] Electromagnetic relays are generally composed of an iron core, a coil, an armature, and a contact spring. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through the coil, thereby generating an electromagnetic effect. The armature will overcome the pulling force of the return spring under the action of electromagnetic attraction and be attracted to the iron core, thereby driving the moving contact of the armature to close with the static contact (normally open contact). When the coil is powered off, the electromagnetic attraction disappears, and the armature will return to its original position under the reaction force of the spring, causing the moving contact to close with the original static contact (normally closed contact).

[0003] When the input quantity (such as voltage, current, temperature, etc.) reaches the specified value, the controlled output circuit is turned on or off. It can be divided into two categories: electrical quantity (such as current, voltage, frequency, power, etc.) relays and non-electrical quantity (such as temperature, pressure, speed, etc.) relays. It has the advantages of fast action, stable operation, long service life, and small size. It is widely used in power protection, automation, motion, remote control, measurement and communication devices.

[0004] The current holding relay can keep the action of its normally open or normally closed contacts unchanged when the power is continuously supplied, but when the power is off, its contacts will reset. Therefore, the traditional relay needs to be continuously energized to make its contacts contact or disconnect. However, if the power is supplied for a long time, it will cause problems such as heat generation and energy consumption of the relay and shortened life. Summary of the invention

[0005] The object of the present invention is to overcome the disadvantages and shortcomings of the prior art and to provide a mechanical power-off holding relay which adopts mechanical self-locking and has the advantages of reliable operation and long service life.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A mechanical power-off holding relay, characterized in that it comprises a main coil, a main spring, a main armature, a main push rod, a Z-shaped retaining frame, a reset push rod, a secondary coil, a secondary spring, a secondary armature, a main coil input and output terminal, a normally open contact, a normally closed contact, a movable connection contact, and a relay housing;

[0008] The first end of the main push rod is arranged in the relay housing, the second end of the main push rod is arranged outside the relay housing through the main push rod small hole, and a movable connection contact is arranged on the top of the second end of the main push rod. The main push rod realizes the function of turning on and off the power of the external contact by moving the movable connection contact and the normally open contact and the normally closed contact; the main coil is arranged in the relay housing; the main spring is arranged on the main push rod; the main armature is fixed on the main push rod;

[0009] The first end of the Z-shaped holder is clamped on the main push rod, and the second end of the Z-shaped holder is connected to the first end of the reset push rod; the second end of the reset push rod is arranged outside the relay housing through the reset push rod hole, and the auxiliary push rod is mainly used to realize the power-off locking and reset functions; the auxiliary coil is arranged in the relay housing; the auxiliary spring is arranged on the reset push rod; the auxiliary armature is arranged on the reset push rod;

[0010] The normally open contact and the normally closed contact are arranged opposite to each other; the main coil input and output terminals are arranged outside the relay housing for electrical signal transmission.

[0011] Furthermore, the main coil is arranged at the first end of the main push rod.

[0012] Furthermore, the main armature is concave, with the concave opening facing downward.

[0013] Furthermore, the main spring is arranged at the concave opening of the main armature through a main spring fixing nut.

[0014] Furthermore, a boss is provided on the main push rod for clamping the Z-shaped retaining frame.

[0015] Furthermore, the auxiliary armature is concave, and the concave opening is fixed facing the inner wall of the relay housing.

[0016] Furthermore, the auxiliary spring is arranged at the concave opening of the auxiliary armature through an auxiliary spring fixing frame.

[0017] Furthermore, the secondary coil is arranged on the secondary push rod.

[0018] Furthermore, the Z-shaped retaining frame is fixed in the relay housing via a rotating shaft.

[0019] Furthermore, the relay housing is made of insulating material; and the reset push rod is made of insulating material.

[0020] The process of the main push rod's power on and off function is:

[0021] The normally open contact and the normally closed contact are arranged above the main push rod, and the main armature is fixedly connected to the main push rod below. When the main coil is energized, the main armature moves downward under the action of the downward electromagnetic force of the main coil, driving the main push rod and the movable connection contact fixed thereon, which contacts the normally open contact, so that the two ends of the normally open contact are connected, and at the same time, it is also disconnected from the normally closed contact. In this way, when the power is on, the normally open contact is closed and the normally closed contact is disconnected. At the same time, when the boss on the main push rod moves downward, under the action of the auxiliary spring, the reset push rod moves outward, driving the Z-shaped holder to rotate around the Z-shaped holder rotation axis, and the upper end of the Z-shaped holder moves to the right, just clamped on the boss of the main push rod, and the Z-shaped holder tightly holds the boss of the main push rod. Even if the main coil is powered off at this time, the main push rod will not move upward due to the action of the spring. Therefore, the two ends of the normally open contact can also be powered on by moving the two ends of the connection contact, realizing the function of power-off retention. The two ends of the normally closed contact are disconnected because they are not in contact with the moving contact and are in the open state.

[0022] When the relay needs to be reset, the two ends of the auxiliary coil are energized briefly, and the lower end of the Z-shaped frame will be pulled to the left by an electromagnetic force from the auxiliary push rod, and its upper end will move to the right. The upper end of the Z-shaped frame is disengaged from the boss of the main push rod, and the main push rod moves upward under the action of the main spring, thereby disconnecting the two ends of the normally open contact and closing the two ends of the normally closed contact.

[0023] The relay can also be reset manually: press the reset push rod, the upper end of the Z-shaped frame is disengaged from the main push rod boss, and the main push rod moves upward under the action of the main spring, thereby disconnecting the two ends of the normally open contact and closing the two ends of the normally closed contact.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] 1. The present invention adopts a relay holding mechanism, and utilizes the connection between the auxiliary coil and the auxiliary push rod and the Z-shaped frame. By energizing the auxiliary coil or manually pressing the reset rod, the Z-shaped frame and the main push rod boss are released, so that the relay is reset. The present invention can use its built-in power-off mechanism to achieve long-term power-off holding by briefly energizing the main coil once, and has the advantages of high control accuracy and long service life;

[0026] 2. The present invention adopts the structure of electric control and manual control. When resetting is required, the auxiliary coil can be temporarily energized once or the reset lever can be pressed to reset the relay, which greatly facilitates the automatic control and manual control fields of the relay, can be widely used in automatic control systems and manual control equipment, and has the advantage of flexible control;

[0027] 3. The reset mechanism of the present invention adopts a micro-motion structure. The reset mechanism of the relay is relatively compact and installed inside the relay. The relay is relatively small as a whole and has the advantage of occupying little space. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A cross-sectional structural diagram of a mechanical power-off holding relay according to the present invention;

[0029] Figure 2 This is an enlarged view of the reset push rod part in the embodiment of the present invention;

[0030] In the figure, 1-relay housing, 2-main coil, 3-main spring, 4-main spring fixing nut, 5-main armature, 6-main push rod, 7-main coil input and output terminals, 8-normally open contact, 9-moving contact, 10-normally closed contact, 11-secondary coil input and output terminals, 12-Z-shaped retaining frame, 13-Z-shaped frame rotating shaft, 14-secondary spring fixing frame, 15-secondary armature, 16-secondary spring, 17-reset push rod, 18-secondary coil. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0032] Example:

[0033] A mechanical power-off holding relay, such as Figure 1 As shown, it is characterized by comprising a main coil 2, a main spring 3, a main armature 5, a main push rod 6, a Z-shaped retainer 12, a reset push rod 17, a secondary coil 18, a secondary spring 16, a secondary armature 15, a main coil input and output terminal 7, a normally open contact 8, a normally closed contact 10, a mobile contact 9, and a relay housing 1;

[0034] The first end of the main push rod is arranged in the relay housing 1, and the second end of the main push rod is arranged outside the relay housing through the main push rod small hole, and a movable connection contact is arranged on the top of the second end of the main push rod, and the movable connection contact 9 is in contact with the normally open contact 8 and the normally closed contact 10 through movement, that is, the normally open contact 8 and the normally closed contact 10 are arranged above the main push rod 6, and the main push rod 6 realizes the function of on and off power of the external contact; the main coil 2 is arranged at the first end of the main push rod in the relay housing 1; the main spring 3 is arranged at the concave mouth of the main armature on the main push rod 6 through the main spring fixing nut; the main armature 5 is fixed on the main push rod 6, and the main armature is concave, and the concave mouth faces downward;

[0035] The Z-shaped holder is fixed in the relay housing through a rotating shaft, and the first end of the Z-shaped holder is clamped on the main push rod, that is, a boss is provided on the main push rod 6 for clamping the Z-shaped holder 12, and the second end of the Z-shaped holder is connected to the first end of the reset push rod; the second end of the reset push rod is arranged outside the relay housing through the reset push rod hole, and the reset push rod 17 is mainly used to realize the power-off locking and reset functions. The enlarged view of the reset push rod part is as shown in Figure 2As shown; the auxiliary coil 17 is arranged on the reset push rod 17 in the relay housing; the auxiliary spring 16 is arranged at the concave opening of the auxiliary armature on the reset push rod 17 through the auxiliary spring fixing frame 14; the auxiliary armature 15 is arranged on the reset push rod, the auxiliary armature 15 is concave, and the concave opening faces the inner wall of the relay housing 1 and is fixed; the relay housing 1 is made of insulating material; the reset push rod 17 is made of insulating material;

[0036] The normally open contact 8 is arranged opposite to the normally closed contact 10; the main coil input and output terminal 7 is arranged outside the relay housing for electrical signal transmission.

[0037] When the main coil 2 is energized, the main armature 5 moves downward under the action of the downward electromagnetic force of the main coil, and drives the main push rod 6 and the movable connection contact 9 fixed thereon, which contacts the normally open contact 8, so that the two ends of the normally open contact 8 are connected, and at the same time, it is disconnected from the normally closed contact 10; at the same time, the boss on the main push rod 6 moves downward, and due to the action of the auxiliary spring 16, the reset push rod 17 moves outward, driving the Z-shaped retaining frame 12 to rotate around the Z-shaped frame rotation axis 13, and the upper end of the Z-shaped retaining frame 12 moves to the right and is just clamped on the boss of the main push rod 6. Even if the power is off at this time, the two ends of the normally open contact 8 can still be in a energized state by moving the two ends of the connection contact 9, thereby realizing the function of power-off retention.

[0038] When the relay needs to be reset, the two ends of the auxiliary coil 18 are energized briefly once, or an electrical signal is given, the reset push rod 17 and the auxiliary armature 15 connected thereto move to the left, pushing the power-off holding Z-shaped frame 12 to move right around the Z-shaped frame rotation axis 13, so that the upper end of the Z-shaped holding frame 12 is disengaged from the boss of the main push rod 6, and the main push rod 6 moves upward under the action of the main spring 3. At this time, the auxiliary coil 18 is de-energized, and the moving connection contact 9 connected to the main push rod 6 connects to the normally open contact 8, finally resetting the relay.

[0039] The reset of the relay is not completely dependent on the two ends of the auxiliary coil 18 being energized once. It can be achieved manually: press the reset push rod 17, push the auxiliary armature 15 connected thereto to move to the left, push the Z-shaped holder 12 to rotate around the Z-shaped holder rotation axis 13, and make the upper end of the Z-shaped holder rotation axis 13 disengage from the boss of the main push rod 6. The main push rod 6 moves upward under the action of the main spring 3. At this time, the auxiliary coil 18 is de-energized, and the mobile connection contact 9 connected to the main push rod is connected to the normally open contact 8, and finally the relay is reset.

[0040] The present invention only needs to briefly energize the main coil 2 once, or manually press the reset push rod 17 to tighten the Z-shaped retaining frame 12 and the boss of the main push rod 6 to connect or disconnect the circuit, and maintain the self-locking or unlocking state before the next power-on, effectively reducing power consumption and eliminating safety hazards caused by long-term operation of the coil.

[0041] It should be noted that the relay housing 1 and the reset push rod are made of insulating material, and the main coil input and output terminals 7 and the auxiliary coil input and output terminals 11 as well as the normally open contact 8 and the normally closed contact 10 are all arranged outside the relay housing to facilitate external wiring work.

[0042] It should be pointed out that the main coil 2 and the auxiliary coil 18 cannot be energized at the same time. When they are energized at the same time, the main push rod 6 has a downward thrust due to the combined force of the coils, and the main spring cannot make the push rod move upward. At this time, the auxiliary coil is also energized or the reset rod 17 is manually pressed. Although the Z-shaped frame 12 moves to the right, the boss of the main push rod 6 is not released. Therefore, the state of the main coil 4 and the auxiliary coil 18 when they are de-energized at the same time is unpredictable, and this situation should be avoided during use.

[0043] When manually resetting, the position of the reset rod can be set at different positions, but in actual installation, sufficient space should be left to press the reset push rod by hand.

[0044] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A mechanical power-off holding relay, It is characterized in that It adopts the structure of electric control and manual control. When it needs to be reset, the relay can be reset by briefly energizing the auxiliary coil or pressing the reset rod. It includes a main coil, a main spring, a main armature, a main push rod, a Z-shaped retainer, a reset push rod, an auxiliary coil, an auxiliary spring, an auxiliary armature, an input and output terminal of the main coil, a normally open contact, a normally closed contact, a movable contact, and a relay housing. The first end of the main push rod is arranged in the relay housing, the second end of the main push rod is arranged outside the relay housing through the main push rod small hole, and a movable connection contact is arranged on the top of the second end of the main push rod, and the movable connection contact is in contact with the normally open contact and the normally closed contact through the movable connection contact; the main coil is arranged in the relay housing; the main spring is arranged on the main push rod; the main armature is fixed on the main push rod; The first end of the Z-shaped holder is clamped on the main push rod, and the second end of the Z-shaped holder is connected to the first end of the reset push rod; the second end of the reset push rod is arranged outside the relay housing through the reset push rod hole; the auxiliary coil is arranged in the relay housing; The auxiliary spring is arranged on the reset push rod; the auxiliary armature is arranged on the reset push rod; The normally open contact and the normally closed contact are arranged opposite to each other; the main coil input and output terminals are arranged outside the relay housing for electrical signal transmission.

2. A mechanical power-off holding relay according to claim 1, It is characterized in that The main coil is arranged at the first end of the main push rod.

3. A mechanical power-off holding relay according to claim 1, It is characterized in that The main armature is concave, with the concave opening facing downward.

4. A mechanical power-off holding relay according to claim 3, It is characterized in that The main spring is arranged at the concave opening of the main armature through a main spring fixing nut.

5. A mechanical power-off holding relay according to claim 1, It is characterized in that The main push rod is provided with a boss for clamping the Z-shaped retaining frame.

6. A mechanical power-off holding relay according to claim 1, It is characterized in that The auxiliary armature is concave, and the concave opening is fixed facing the inner wall of the relay housing.

7. A mechanical power-off holding relay according to claim 6, It is characterized in that The auxiliary spring is arranged at the concave opening of the auxiliary armature through an auxiliary spring fixing frame.

8. A mechanical power-off holding relay according to claim 1, It is characterized in that The secondary coil is arranged on the secondary push rod.

9. A mechanical power-off holding relay according to claim 1, It is characterized in that The Z-shaped retaining frame is fixed in the relay housing via a rotating shaft.

10. A mechanical power-off holding relay according to claim 1, It is characterized in that The relay housing is made of insulating material; the reset push rod is made of insulating material.

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