Relay

Abstract

A relay belongs to the technical field of relays and comprises a frame, an iron core, a coil winding, a yoke, a pressure spring, an armature, a pushing card, a movable spring leading-out pin, a movable reed, a movable contact, a static spring leading-out pin, a static reed and a static contact. The angle of the right lower bending part of the middle part of the movable contact spring is 137.5 + / -0.5 degrees, and the angle of the right part of the movable contact spring close to the right upper bending part of the movable contact is 145.5 + / -0.5 degrees; the angle of the downward bending part of the middle part of the static reed is 90 degrees + 1 degree / -0 degree; by bending the movable reed and the static reed, the contact gap of the relay is greater than or equal to 1.8 mm after the relay is assembled; the coil winding comprises a coil holder and a coil, and the diameter of the coil winding is smaller than or equal to 10 mm. The beneficial effects of the utility model are that the arc extinguishing capability is strong, the relay can operate normally when a large current is used, and no safety risk exists.

Description

Technical Field

[0001] The utility model discloses a relay, in particular to a large current relay for maintaining a stable low voltage, belonging to the technical field of relays. Background Art

[0002] A relay is an automatic electrical switch that can automatically switch the controlled circuit when a specified input is given and maintained for a long enough time. Electromagnetic relays are generally composed of a magnetic circuit part (coil, yoke, iron core, compression spring, armature combination (armature, push card)), a frame part (moving spring part (moving spring lead-out piece, moving spring piece, moving contact), and a static spring part (static spring lead-out piece, static contact)). The magnetic circuit part forms a closed system, namely the control circuit, and the frame part forms a closed load system, namely the controlled circuit. When the control circuit inputs the rated voltage and current, or disconnects the rated voltage and current, the contacts of the controlled circuit will generate an arc at the moment of connection or disconnection. The arc extinguishing ability of the relay is poor. When the voltage is constant, the greater the current, the greater the heat generation. If this heat exceeds the design temperature limit of the relay, it will cause the relay to fail early at the least, and it will cause the relay to catch fire in severe cases, threatening the personal and property safety of related users. With the expansion of relay application occasions, the demand for large currents in the controlled circuit and continuous and stable operation of the relay after voltage reduction is increasing. Utility Model Content

[0003] The purpose of the utility model is to provide a relay with strong arc extinguishing ability so that the relay can operate normally without safety risks when using large current, in view of the defects in the prior art of the above-mentioned large current relay, that is, the arc extinguishing ability of the relay is poor, which leads to early failure of the relay and safety risks when using large current.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a large current relay maintaining a stable low voltage, comprising a frame, a magnetic circuit assembly, an armature assembly and a contact assembly; the magnetic circuit assembly is arranged at the lower part of the frame, comprising an iron core, a coil winding and a yoke, the iron core is inserted in the coil winding and arranged horizontally, the yoke is in a right angle shape, comprising a horizontal part and a vertical part, the horizontal part of the yoke is arranged above the coil winding, and the vertical part of the yoke is arranged on the right side of the iron core and is riveted to the right end of the iron core; the armature assembly The armature assembly is arranged at the upper left part of the frame, and includes a compression spring, an armature and a push card; the contact assembly includes a movable spring lead-out pin, a movable spring sheet, a movable contact, a static spring lead-out pin, a static spring sheet and a static contact, and the movable contact and the static contact are arranged at the upper right part of the frame; one end of the movable spring sheet is connected to the movable spring lead-out pin and fixed on the frame, and the other end of the movable spring sheet is riveted to the movable contact, one end of the static spring sheet is connected to the static spring lead-out pin and fixed on the frame, and the other end of the static spring sheet is riveted to the static contact; after assembly, a contact gap is formed between the movable contact and the static contact;

[0005] The angle of the middle part of the moving spring bent to the lower right is 137.5°±0.5°, and the angle of the right part of the moving spring, close to the moving contact, bent to the upper right is 145.5°±0.5°;

[0006] The angle of the downward bending point in the middle of the static spring piece is 90°+1° / -0°;

[0007] By bending the moving spring and the static spring, the contact gap of the relay is ≥1.8mm after the relay is assembled, which improves the arc extinguishing ability of the relay.

[0008] The coil winding includes a wire frame and a coil. Under the premise that the coil winding diameter is ≤10mm, the coil resistance is satisfied by adjusting the wire diameter of the coil enameled wire and the number of coil turns (5V: 18Ω, 9V: 58Ω, 12V: 103Ω, 18V: 231Ω, 24V: 411Ω, 48V: 1646Ω), thereby increasing the coil power consumption to 1.4W, improving the electromagnetic attraction of the coil winding, and making the release voltage of the relay lower during operation, thereby achieving the purpose of voltage reduction and maintenance, and meeting the use conditions of new energy customer groups such as photovoltaics.

[0009] The yoke is L-shaped, one side of the yoke is riveted to the tail end of the iron core, and the other side of the yoke is arranged above the coil along the axis of the coil; the armature is assembled above the yoke, and the compression spring is arranged above the yoke and on the left side of the armature, and the armature and the end of the other side of the yoke are connected by the compression spring.

[0010] The movable spring lead-out pin is arranged below the movable spring sheet and is led out downward from the lower left of the frame, and the static spring lead-out pin is arranged below the static contact and is led out downward from the lower right of the frame.

[0011] It also includes a left coil lead-out piece and a right coil lead-out piece. The left coil lead-out piece is led downward from the lower left part of the frame, and the right coil lead-out piece is led downward from the lower right part of the frame.

[0012] The contact gap of the relay is 2.002 mm.

[0013] Compared with the prior art, the beneficial effects of the utility model are: improving the arc extinguishing ability and voltage reduction holding ability of the relay under large current is the key to the current relay design and manufacturing. Through the bending design of the dynamic spring and the static spring, the contact gap of the relay is ≥1.8mm after the relay is assembled, which improves the arc extinguishing ability and voltage reduction holding ability of the relay, and the relay can work continuously and stably for a long time after the voltage is reduced. When using large current, the relay can operate normally without safety risks, which can completely avoid the early failure of the relay and even fire, and can ensure the personal and property safety of relevant users. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is: the main structural diagram of the utility model;

[0015] Figure 2 Yes: front view of the moving reed;

[0016] Figure 3 Yes: front view of static reed;

[0017] Figure 4 Yes: Partial cross-sectional structure diagram of coil winding.

[0018] Explanation of the accompanying drawings: frame 1, iron core 2, coil winding 3, bobbin 301, coil 302, yoke 4, compression spring 5, armature 6, push card 7, movable spring lead-out pin 8, movable spring sheet 9, movable contact 10, static spring lead-out pin 11, static spring sheet 12, static contact 13, left coil lead-out sheet 14, right coil lead-out sheet 15. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figures 1 to 4 As shown, a relay such as Figure 1 As shown, it includes a frame 1, a magnetic circuit assembly, an armature 6 assembly and a contact assembly; the magnetic circuit assembly is arranged at the lower part of the frame 1, including an iron core 2, a coil 302 winding 3 and a yoke 4, the iron core 2 is inserted into the coil winding 3 and arranged horizontally, the yoke 4 is right-angled, including a horizontal part and a vertical part, the horizontal part of the yoke 4 is arranged above the coil winding 3, and the vertical part of the yoke 4 is arranged on the right side of the iron core 2 and is riveted to the right end of the iron core 2; the armature 6 assembly is arranged at the upper left part of the frame 1, and the armature 6 assembly includes a compression spring 5, an armature 6 and a push card 7; the contact assembly comprises a movable spring lead-out pin 8, a movable spring sheet 9, a movable contact 10, a static spring lead-out pin 11, a static spring sheet 12 and a static contact 13, wherein the movable contact 10 and the static contact 13 are arranged at the upper right part of the frame 1; one end of the movable spring sheet 9 is connected to the movable spring lead-out pin 8 and fixed to the frame 1, and the other end of the movable spring sheet 9 is riveted to the movable contact 10, one end of the static spring sheet 12 is connected to the static spring lead-out pin 11 and fixed to the frame 1, and the other end of the static spring sheet 12 is riveted to the static contact 13; after assembly, a contact gap is formed between the movable contact 10 and the static contact 13;

[0021] like Figure 2As shown, the angle α of the middle part of the movable spring piece 9 bent to the lower right is 137.5°±0.5°, and the angle β of the right part of the movable spring piece 9, close to the movable contact 10, bent to the upper right is 145.5°±0.5°;

[0022] like Figure 3 As shown, the angle γ of the downwardly bent middle portion of the static spring piece 12 is 90°+1° / -0°;

[0023] like Figure 1 As shown, by bending the moving spring piece 9 and the stationary spring piece 12, after the relay is assembled, the contact gap S of the relay is 2.002 mm, thereby improving the arc extinguishing ability of the relay;

[0024] like Figure 4 As shown, the coil winding 3 includes a bobbin 301 and a coil 302. Under the premise that the coil winding diameter is ≤10mm, the coil resistance is satisfied by adjusting the wire diameter of the coil enameled wire and the number of turns of the coil (5V: 18Ω, 9V: 58Ω, 12V: 103Ω, 18V: 231Ω, 24V: 411Ω, 48V: 1646Ω), thereby increasing the power consumption of the coil 302 to 1.4W, improving the electromagnetic attraction of the coil winding 3, and making the release voltage of the relay lower during operation, thereby achieving the purpose of voltage reduction and holding, and meeting the use conditions of new energy customer groups such as photovoltaics.

[0025] The yoke 4 is L-shaped, one side of the yoke 4 is riveted to the tail end of the iron core 2, and the other side of the yoke 4 is arranged above the coil 302 along the axis of the coil 302; the armature 6 is assembled above the yoke 4, and the compression spring 5 is arranged above the yoke 4 and on the left side of the armature 6, and the armature 6 and the end of the other side of the yoke 4 are elastically connected by the compression spring 5.

[0026] like Figure 1 As shown, the movable spring lead-out pin 8 is arranged below the movable spring piece 9 and is led downward from the lower left of the frame 1, and the static spring lead-out pin 11 is arranged below the static contact 13 and is led downward from the lower right of the frame 1.

[0027] like Figure 1 As shown, it also includes a left coil lead-out plate 14 and a right coil lead-out plate 15. The left coil lead-out plate 14 is led downward from the lower left part of the frame 1, and the right coil lead-out plate 15 is led downward from the lower right part of the frame 1.

[0028] The embodiments described above are only preferred implementations of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A relay, comprising a frame, a magnetic circuit assembly, an armature assembly and a contact assembly; the magnetic circuit assembly is arranged at the lower part of the frame, comprising an iron core, a coil winding and a yoke, the iron core is inserted into the coil winding and arranged horizontally, the yoke is in a right angle shape, comprising a horizontal part and a vertical part, the horizontal part of the yoke is arranged above the coil winding, the vertical part of the yoke is arranged on the right side of the iron core and is riveted to the right end of the iron core; the armature assembly is arranged at the upper left part of the frame, the armature assembly comprises a compression spring, an armature and a push card; the contact assembly comprises a movable spring lead-out pin, a movable spring sheet, a movable contact, a static spring lead-out pin, a static spring sheet and a static contact, the movable contact and the static contact are arranged at the upper right part of the frame; one end of the movable spring sheet is connected to the movable spring lead-out pin and fixed to the frame, the other end of the movable spring sheet is riveted to the movable contact, one end of the static spring sheet is connected to the static spring lead-out pin and fixed to the frame, and the other end of the static spring sheet is riveted to the static contact; after assembly, a contact gap is formed between the movable contact and the static contact, characterized in that: The angle of the middle part of the moving spring bent to the lower right is 137.5°±0.5°, and the angle of the right part of the moving spring, close to the moving contact, bent to the upper right is 145.5°±0.5°; The angle of the downward bending point in the middle of the static spring piece is 90°+1° / -0°; By bending the moving spring and the static spring, the contact gap of the relay is ≥1.8mm after the relay is assembled; The coil winding comprises a bobbin and a coil, and the diameter of the coil winding is ≤10 mm.

2. A relay according to claim 1, characterized in that: The yoke is L-shaped, one side of the yoke is riveted to the tail end of the iron core, and the other side of the yoke is arranged above the coil along the axis of the coil; the armature is assembled above the yoke, and the compression spring is arranged above the yoke and on the left side of the armature, and the armature and the end of the other side of the yoke are connected by the compression spring.

3. A relay according to claim 1, characterized in that: The movable spring lead-out pin is arranged below the movable spring sheet and is led out downward from the lower left of the frame, and the static spring lead-out pin is arranged below the static contact and is led out downward from the lower right of the frame.

4. A relay according to claim 1, characterized in that: It also includes a left coil lead-out piece and a right coil lead-out piece. The left coil lead-out piece is led downward from the lower left part of the frame, and the right coil lead-out piece is led downward from the lower right part of the frame.

5. A relay according to claim 1, characterized in that: The contact gap of the relay is 2.002 mm.

Images