阅读说明：本技术 加强接点信号继电器 (Reinforced contact signal relay ) 是由 朱建新 禹志阳 于 2021-08-16 设计创作，主要内容包括：本发明公开一种加强接点信号继电器,包括底座,底座上安装有接点组件和磁路组件,接点组件包括定位片、触头限位支架、动作推杆、加强静接点片、加强动接点片；触头限位支架和定位片连接,定位片、加强动接点片、加强静接点片固定在底座上；加强动接点片和动作推杆连接,动作推杆下端连接衔铁；每个加强静接点的两侧各设有一个片状的灭弧磁钢结构,相对设置的两个灭弧磁钢结构磁场方向相异；衔铁下表面设有配重片,当线圈得电,衔铁和线圈吸合,安装在动作推杆上的加强动接点片和一侧的加强静接点片构成闭合磁路；当线圈失电,衔铁和线圈脱离,继电器在配重片重力的作用下复位。本发明能够显著缩短燃弧时间,并具有优秀的抗振动性和稳定性。(The invention discloses a reinforced contact signal relay, which comprises a base, wherein a contact component and a magnetic circuit component are arranged on the base, and the contact component comprises a positioning sheet, a contact limiting bracket, an action push rod, a reinforced static contact sheet and a reinforced movable contact sheet; the contact limiting bracket is connected with a positioning sheet, and the positioning sheet, the reinforced movable contact point sheet and the reinforced static contact point sheet are fixed on the base; the reinforced movable contact piece is connected with the action push rod, and the lower end of the action push rod is connected with the armature; two sides of each strengthening static contact are respectively provided with a flaky arc extinguishing magnetic steel structure, and the magnetic field directions of the two arc extinguishing magnetic steel structures which are oppositely arranged are different; the lower surface of the armature is provided with a counterweight plate, when the coil is electrified, the armature and the coil are attracted, and a reinforced moving contact point plate arranged on the action push rod and a reinforced static contact point plate at one side form a closed magnetic circuit; when the coil loses power, the armature and the coil are separated, and the relay resets under the action of the gravity of the counterweight plate. The invention can obviously shorten the arcing time and has excellent vibration resistance and stability.)

1. A strengthen contact signal relay, includes base (1), installs contact subassembly and magnetic circuit subassembly on base (1), the magnetic circuit subassembly includes armature (31), yoke (32), coil (33), its characterized in that:

the contact assembly comprises a positioning sheet (21), a contact limiting support (22), an action push rod (23), double rows of reinforced static contact sheets (24) and double rows of reinforced movable contact sheets (25), the contact limiting support (22) is connected with the positioning sheet (21), and the positioning sheet (21), the reinforced movable contact sheets (24) and the reinforced static contact sheets (25) are all fixed on the base (1); the action push rod (23) is connected with the reinforced action contact piece (25), and the lower end of the action push rod (23) is connected with the armature (31); the contact limiting support (22) is provided with an arc extinguishing magnetic steel support (221), the arc extinguishing magnetic steel support (221) is provided with an arc extinguishing magnetic steel structure (26), the arc extinguishing magnetic steel structure (26) is flaky, two sides of each reinforcing static contact are respectively provided with one arc extinguishing magnetic steel structure (26), and the magnetic field directions of the two arc extinguishing magnetic steel structures (26) which are oppositely arranged are different;

the armature (31) comprises a first movable end (311) and a second movable end (312), wherein the first movable end (311) is opposite to the yoke (32), and the second movable end (312) is opposite to the coil (33); the action push rod (23) is connected with the first movable end (311); the lower surface of the first movable end (311) is provided with a counterweight plate (4), and the yoke (32) is provided with a counterweight stop nail (5);

when the coil (33) is electrified, the second movable end (312) and the coil (33) are attracted, the first movable end (311) moves along with the second movable end (312) to push the action push rod (23), and the reinforced movable contact point sheet (24) arranged on the action push rod (23) and the reinforced static contact point sheet (24) on one side form a closed magnetic circuit; when the coil (33) loses power, the second movable end (312) is separated from the coil (33), the first movable end (311) moves under the action of the gravity of the counterweight plate (4), and the contact separation is controlled by actuating the push rod (23).

2. The enhanced contact signal relay of claim 1, wherein: the reset assembly is arranged on the yoke (32) and comprises a first elastic piece (62) and a second elastic piece (64), the first elastic piece (62) abuts against the second elastic piece (64) to apply downward pressure to the second elastic piece (64), one end of the second elastic piece (64) is fixed on the yoke (32), and the other end of the second elastic piece (64) is connected with the first movable end (311)/the counterweight plate (4).

3. The contact signal relay according to claim 1 or 2, wherein: the first elastic piece (62) is a spring, the upper end of the first elastic piece is fixed, and the bottom end of the first elastic piece is propped against the second elastic piece (64).

4. The enhanced contact signal relay of claim 3, wherein: the reset assembly comprises a connecting rod (61), and the connecting rod (61) is installed on the yoke (32) and used for fixing the spring.

5. The enhanced contact signal relay of claim 4, wherein: the second elastic piece (64) is a spring piece; the connecting rod (61) passes through the first movable end (311) and the elastic sheet in sequence and then is fixed on the yoke (32).

6. The enhanced contact signal relay of claim 5, wherein: the reset assembly further comprises a gasket (63), the gasket (63) is sleeved on the connecting rod (61), and the bottom end of the spring abuts against the elastic sheet through the gasket (63).

7. The enhanced contact signal relay of claim 1, wherein: the counterweight plate (4) is arranged at the end part of the first movable end (311), one side of the counterweight plate (4) is provided with a connecting piece (7), and the connecting piece (7) is provided with a hole/groove matched with the second elastic piece (64); the second elastic member (64) is connected to the first movable end (311) through the hole/groove.

8. The contact signal relay according to claim 1, wherein the positioning piece (21) is U-shaped.

9. The signal relay with the reinforced contact point as claimed in claim 8, wherein the yoke (32) is provided with a bracket (8), the upper end of the contact limiting bracket (22) is connected with the positioning piece (21), and the lower end is mounted on the bracket (8).

10. The contact signal relay according to claim 8 or 9, wherein the arc extinguishing magnetic steel structure (26) is made of neodymium iron boron.

Technical Field

The invention relates to a signal relay, in particular to a reinforced contact signal relay.

Background

Utility model CN212434552U discloses a novel safe type signal relay (hereinafter referred to as JWXC-1700-YH), which adopts clapper type magnetic circuit structure, utilizes electromagnetic force to make armature action, drives the push rod shaft to drive the intermediate junction, be used for accomplishing and the logic realization of dynamic joint. The logic realization of the dynamic breaking contact is completed in a gravity type mode.

The novel safe signal relay comprises a plurality of groups of common contacts, the contact gaps are small, large current cannot pass through the novel safe signal relay, and the bearing voltage is limited. Aiming at the circuit requirements of large current and large voltage, a signal relay with a reinforced contact structure is required. In order to realize the contact stroke with larger contact gap, the magnetic gap of the armature in the reinforced contact signal relay needs to be increased, namely the original armature angle needs to be changed, and the larger armature magnetic gap also needs to be driven by larger magnetic force, so the electromagnetic attraction of the coil needs to be correspondingly increased. Secondly, the strengthening contact in the strengthening contact signal relay is stronger than the common contact in the phenomenon of breaking and pulling arc when the contact is connected because of the increase of the required voltage and current, so the strengthening contact needs external measures to help to complete the realization of arc extinction. Therefore, the reinforced contact signal relay needs to have excellent arc extinguishing capability and vibration resistance to deal with severe application scenes, and the safety and stability of a circuit are ensured.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the problems in the prior art, the invention aims to provide a reinforced contact signal relay with excellent arc extinguishing capability and strong vibration resistance.

The technical scheme is as follows: a reinforced contact signal relay comprises a base, wherein a contact component and a magnetic circuit component are mounted on the base, and the magnetic circuit component comprises an armature, a yoke and a coil;

the contact assembly comprises a positioning sheet, a contact limiting support, an action push rod, double rows of reinforced static contact sheets and double rows of reinforced movable contact sheets, the contact limiting support is connected with the positioning sheet, and the positioning sheet, the reinforced movable contact sheets and the reinforced static contact sheets are all fixed on the base; the action push rod is connected with the reinforced action contact piece, and the lower end of the action push rod is connected with the armature; the contact limiting support is provided with an arc extinguishing magnetic steel support, the arc extinguishing magnetic steel support is provided with an arc extinguishing magnetic steel structure, the arc extinguishing magnetic steel structure is flaky, two sides of each reinforcing static contact are respectively provided with an arc extinguishing magnetic steel structure, and the magnetic field directions of the two arc extinguishing magnetic steel structures which are oppositely arranged are different;

the armature comprises a first movable end and a second movable end, wherein the first movable end is opposite to the yoke iron, and the second movable end is opposite to the coil; the action push rod is connected with the first movable end; the lower surface of the first movable end is provided with a counterweight plate, and the yoke is provided with a counterweight stop nail;

when the coil is electrified, the second movable end is attracted with the coil, the first movable end moves along with the second movable end to push the action push rod, and the reinforced movable contact piece arranged on the action push rod and the reinforced static contact piece on one side form a closed magnetic circuit; when the coil loses power, the second movable end is separated from the coil, the first movable end moves under the action of gravity of the counterweight plate, and the contact separation is controlled through the action push rod.

Furthermore, a reset assembly is arranged on the yoke and comprises a first elastic piece and a second elastic piece, the first elastic piece abuts against the second elastic piece and applies downward pressure to the second elastic piece, one end of the second elastic piece is fixed on the yoke, and the other end of the second elastic piece is connected with the first movable end/counterweight plate. Preferably, the counterweight plate is arranged at the end part of the first movable end, one side of the counterweight plate is provided with a connecting piece, and the connecting piece is provided with a hole/groove matched with the second elastic piece; the second elastic element is connected with the first movable end through the hole/groove.

Furthermore, the first elastic part is a spring, the upper end of the first elastic part is fixed, and the bottom end of the first elastic part is propped against the second elastic part. The reset assembly comprises a connecting rod, and the connecting rod is installed on the yoke and used for fixing the spring. The second elastic piece is a spring piece; the connecting rod passes through the first movable end and the elastic sheet in sequence and then is fixed on the yoke.

Furthermore, the reset assembly further comprises a gasket, the gasket is sleeved on the connecting rod, and the bottom end of the spring abuts against the elastic sheet through the gasket.

Furthermore, the locating plate is U-shaped.

Furthermore, a support is arranged on the yoke, the upper end of the contact limiting support is connected with the positioning piece, and the lower end of the contact limiting support is installed on the support.

Further, the arc extinguishing magnetic steel structure is made of neodymium iron boron.

Has the advantages that:

the invention has the following remarkable advantages: 1. arc extinguishing capability: the arc extinguishing magnet steel can provide enough and stable magnetic field, and effectively prevents the phenomenon of unable arc extinguishing from taking place, thereby promoting the arc extinguishing stability by a wide margin. Under the condition of DC220V and 5A, the arc burning time is 6-8 ms, and the arc extinguishing time is obviously shortened compared with the prior art. 2. Vibration resistance: the arc extinguishing magnetic steel is not directly fixed at the top end of the contact elastic sheet, but fixed in a split mounting mode, so that the inertia swing during vibration is greatly reduced, the contact bounce time is greatly reduced, in the preferred embodiment, the amplitude can be stabilized below 0.5mm, no contact bounce occurs at 0-36 Hz, the contact bounce time is 10-15 ms, and the reliability of the system is ensured; the restoring mode of gravity and elasticity of the existing safety relay is inherited, and the action point of the elasticity is greatly optimized by changing the position of the pressure spring, so that the restoring action of the signal relay is more reliable and stable. 3. Stability: the cantilever type limiting clamping mode is improved into a closed type limiting clamping mode, and the whole structure is more stable and reliable. 4. Modular design: the modules are mutually independent and do not interfere with each other, and the installation and the maintenance are convenient.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic layout of an arc extinguishing magnet steel structure;

FIG. 4 is a gravity + elastic recovery pattern of comparative example 1;

FIG. 5 shows the gravity + elastic force recovery mode of example 2;

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the following examples and accompanying drawings.

Example 1:

a reinforced contact signal relay comprises a base 1, wherein a contact component and a magnetic circuit component are mounted on the base 1, and the magnetic circuit component comprises an armature 31, a yoke 32, a coil 33 and a static iron core 34; the contact assembly comprises a positioning sheet 21, a contact limiting bracket 22, an action push rod 23, a double-row reinforced static contact sheet 24, a double-row reinforced movable contact sheet 25, a double-row static contact sheet 27 and a double-row movable contact sheet 28. The locating plate 21, the reinforced movable contact piece 24, the reinforced static contact piece 25, the static contact piece 27 and the movable contact piece 28 are all horizontally fixed on the base 1, the upper end of the contact limiting support 22 is connected with the locating plate 21, and the lower end of the contact limiting support is installed on the support 8. Each reinforced movable contact piece 25 is provided with a pair of reinforced static contact pieces 24 up and down correspondingly, the tail end of each reinforced movable contact piece 24 is provided with a reinforced movable contact 241, and the tail end of each reinforced static contact piece 25 is provided with a reinforced static contact 251; the reinforced movable contact piece 25 is connected with the action push rod 23, and the lower end of the action push rod 23 is connected with the armature 31; the contact limiting bracket 22 is provided with a circular arc extinguishing magnetic steel bracket 221, and the arc extinguishing magnetic steel bracket 221 is provided with a plurality of sheet arc extinguishing magnetic steels 26.

Specifically, two sides of each strengthening stationary contact are respectively provided with one arc extinguishing magnetic steel 26, and the magnetic field directions of the two arc extinguishing magnetic steels 26 which are oppositely arranged are different; the size of this embodiment is 5mm 10mm, and thickness is 1mm, and arc extinguishing magnet steel 26 installs on arc extinguishing magnet steel support 221, and arc extinguishing magnet steel support 221 installs on spacing support 22 of contact, and the magnetic field direction passes and strengthens the stationary contact, and is tangent with the electric arc direction that produces when the contact divides absolutely.

The arc extinguishing magnet steel structure 26 is preferably neodymium iron boron in material, adopts the arc extinguishing magnet steel of neodymium iron boron material, and the field intensity improves 20% than current relay, combines the fixed mode of magnet steel, can provide enough and stable magnetic field.

Utility model patent CN212434552U discloses a novel safe type signal relay includes that 8 groups of ordinary contacts constitute, strengthens contact signal relay and compares in this prior art, and contact quantity and contact type exist the difference, and is in quantity than reducing to some extent by 8 groups of contacts. The reinforced contact signal relay is composed of 2 groups of common contacts and 2 groups of reinforced contacts (symmetrically arranged at two sides of the action push rod 23). Because the reinforced contact needs to pass larger current than the common contact and bears the on-off voltage of the contact with larger voltage, the elastic sheet of the reinforced contact is thicker than the common elastic sheet, the contact gap is larger than that of the common contact, and the contact pressure is larger than that of the common contact.

The structure is shown in fig. 1, the armature 31 is placed under the contact assembly in an inverted L shape, and is composed of a first movable end 311 and a second movable end 312, and the first movable end 311 and the second movable end 312 are hard-connected. Wherein, the first movable end 311 is horizontally opposite to the yoke 32, and the second movable end 312 is opposite to the static iron core 34; the action push rod 23 is rigidly connected with the first movable end 311; the lower surface of the first movable end 311 is provided with a counterweight 4, and the yoke 32 is provided with a counterweight stop nail 5.

The working principle is as follows: when the coil 33 is electrified, the second movable end 312 is attracted with the static iron core 34, the first movable end 311 moves along with the second movable end 312 to push the action push rod 23, the second movable end 312 overcomes the gravity of the counterweight plate 4 and moves upwards, the movable contact of the reinforced movable contact plate 25 is communicated with the reinforced static contact above, and the logic realization of the movable contact is completed; when the coil 33 is de-energized, the second movable end 312 is separated from the stationary iron core 34, the first movable end 311 moves under the action of the gravity of the weight plate 4, and the action push rod 23 controls the reinforced movable contact to move downwards, so that the logic realization of the movable contact and the movable disconnection contact is completed.

Example 2:

this embodiment provides a reset mode combining elastic force and gravity on the basis of embodiment 1, so as to further optimize the anti-vibration performance of the relay. In fig. 1, a return assembly is mounted on the yoke 32, the return assembly includes a first elastic element 62 and a second elastic element 64, the first elastic element 62 abuts against the second elastic element 64 to apply downward pressure to the second elastic element 64, one end of the second elastic element 64 is fixed on the yoke 32, and the other end is connected to the first movable end 311.

Preferably, the first elastic member 62 is a spring, the second elastic member 64 is a spring sheet, and the reset assembly further includes a connecting rod 61 and a spacer 63. The connecting rod 61 passes through the first movable end 311 and the elastic sheet in sequence and then is fixed on the upper surface of the second movable end 312. The spring and the gasket 63 are sleeved on the connecting rod 61, the upper end of the spring is fixed by a nut, and the lower end of the spring presses the gasket 63 and then props against the elastic sheet.

In order to realize a better resetting effect, the counterweight plate 4 is arranged at the end part of the first movable end 311, a connecting piece 7 is arranged on the first movable end 311, and a hole/groove is formed in the connecting piece 7; the spring is arranged along the yoke 32 and the end of the spring is inserted into the hole/slot, thereby achieving the connection with the first movable end 311.

Further preferably, the positioning piece 21 is U-shaped, the yoke 32 is provided with a bracket 8, the bracket 8 is connected with the contact limiting bracket 22, and the positioning piece 21, the contact limiting bracket 22, the bracket 8, the yoke 32 and the base 1 form a closed supporting loop.

The utility model CN212434552U is a comparative example 1, and the benefit of the reset mode adopted by the invention is explained in detail.

Fig. 4 is a pressure spring type recovery mode of utility model patent CN212434552U, the elastic force acts on one side of the first movable end, and the gravity acts on the other side of the first movable end. In fig. 5, the pressure of the first elastic member (spring) is converged by the elastic sheet and the gravity, and the pressure acting point is close to the gravity, so that the moment of the pressure is closer to the counterforce moment to be overcome, and a better anti-inertia swing amplitude can be realized in a vibration environment (inertia is caused by the weight stack and the direction is opposite to the direction of the gravity). By adopting the structure of the embodiment, the contact mode when the contact is closed is more reliable, and the recovery action of the signal relay is more stable.

In summary, the reinforced contact relay of the present invention uses a clapper type magnetic circuit structure, and utilizes electromagnetic force to make the armature act to drive the intermediate contact, so as to complete the logic implementation of the dynamic on-off contact and the dynamic off-off contact. Because the voltage and current of the reinforced contact are increased (the reinforced contact is 380V, 5A, the common contact is 24V, 1A), the phenomenon of breaking and breaking arc is stronger than that of the common contact when the contact is connected, the invention adopts the design concept of miniaturization and lightweight, proposes to adopt the permanent magnet magnetic blow mode to extinguish arc, uses the magnetic sheet type arc extinguishing magnetic steel as the magnetic blow permanent magnet, and in the actual configuration, if the arc extinguishing magnetic steel is directly fixed at the tail end of the contact elastic piece, the arc extinguishing magnetic steel has larger weight, the swing amplitude is large when the relay acts, and the stability of arc extinguishing and contact is not favorable.

Based on the structure, the contact limiting support is adopted, the arc extinguishing magnetic steel support is arranged on the contact limiting support, the contact limiting support and the yoke are rigidly fixed, and the overall structure is firmer and more reliable; the arc extinguishing magnetic steel is installed on the arc extinguishing magnetic steel bracket in a split mode, so that the inertia swing amplitude can be reduced during vibration, and the contact bounce performance and the vibration resistance performance are greatly improved. Preferably, the arc extinguishing magnet steel is made of neodymium iron boron, and can provide a sufficient and stable magnetic field.

A reinforced contact relay of type JWJXC-480 is used as comparative example 2, and is compared with example 2:

TABLE 1 structural comparison table

TABLE 2 data parameter comparison Table

The movable breaking contact breaking waveform and the movable breaking contact connecting waveform of the reinforced contact relay are tested through simulation, and compared with test data, the reinforced contact relay has the advantages of structural stability, contact rebound time, vibration resistance and arc extinguishing capacity compared with an original JWJXC-480 reinforced contact relay.