High-reliability intermediate relay

Abstract

The utility model relates to a high-reliability intermediate relay, which comprises a bottom plate, an electromagnetic assembly arranged on the bottom plate, a transmission assembly and a plurality of microswitches, the electromagnetic assembly comprises a yoke arranged on the bottom plate, a coil rack arranged in the yoke, a coil arranged on the coil rack, a static iron core arranged in the coil rack, and a movable iron core arranged in the coil rack and matched with the static iron core; the transmission assembly comprises a shell arranged on the yoke and a top plate arranged in the shell in a sliding mode and matched with the movable iron core in a linkage mode, the microswitches are arranged on the shell, the top plate acts along with the movable iron core and triggers the microswitches, and connection or disconnection of the microswitches is achieved. The utility model has the advantages of simple structure, stable and reliable performance, low failure rate, convenience in assembly, good protection performance and high reliability.

Description

Technical Field

[0001] The utility model particularly relates to a high-reliability intermediate relay. Background Art

[0002] An intermediate relay is an electrical control device used in relay protection and automatic control systems. Its primary function is to convert a single input signal into multiple output signals, increasing the number of signals in a control circuit or amplifying a signal for simultaneous transmission to multiple control elements. Intermediate relays are typically used to transmit intermediate signals, increase the number and capacity of contacts, and enable simultaneous control of multiple circuits. They can also directly control small-capacity motors or other electrical actuators.

[0003] Currently, most intermediate relays are slightly modified versions of consumer electrical appliances. These are bulky, have exposed contacts, unstable operation, and a high failure rate, making them unable to meet the high-density, high-capacity, and high-vibration requirements of railway transportation. This is particularly true for locomotives operating in windy and sandy regions like Northwest and North China, or on industrial and mining sites subject to heavy dust and oil pollution. Adherence to dust and oil can cause the intermediate relay's operating mechanism to become stuck, or dust accumulation on the contacts can prevent them from reliably closing. Summary of the Invention

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a high-reliability intermediate relay with simple structure, stable and reliable performance, low failure rate, convenient assembly and good protection performance.

[0005] To achieve the above-mentioned purpose, the present invention adopts a high-reliability intermediate relay, including a base plate, an electromagnetic assembly arranged on the base plate, a transmission assembly, and multiple micro switches. The electromagnetic assembly includes a yoke arranged on the base plate, a coil frame arranged in the yoke, a coil arranged on the coil frame, a static iron core arranged in the coil frame, and a moving iron core arranged in the coil frame and matched with the static iron core. The transmission assembly includes a shell arranged on the yoke, a top plate slidably arranged in the shell and linked with the moving iron core. The multiple micro switches are respectively arranged on the shell. The top plate moves with the moving iron core and triggers the multiple micro switches to realize the connection or disconnection of the multiple micro switches.

[0006] The beneficial effects of the above structure are as follows: the micro switch of the intermediate relay has a simple and compact structure, is fully sealed and maintenance-free, has a dustproof grade of IP60, operates stably and reliably, and does not have poor contact. The transmission component adopts a modular structural design, which is conducive to the modular assembly of the intermediate relay and has higher assembly efficiency. The top plate of the transmission component is set in the shell, which can effectively prevent the entry of wind, sand, dust, and oil, and will not cause the top plate to become stuck. The electromagnetic component triggers multiple micro switches through the top plate, thereby ensuring the synchronization of the actions of multiple micro switches and improving the working reliability. Therefore, the intermediate relay has the advantages of simple structure, stable and reliable performance, low failure rate, convenient assembly, good protection performance, and high reliability.

[0007] Specifically, the top plate has two guide rods at each end, and the housing is provided with guide holes that mate with the guide rods. The guide rods are inserted into the guide holes, forming a sliding connection between the guide rods and the housing. The guide holes in the housing guide the top plate, thereby ensuring reliable operation of the top plate and improving the operating reliability of the intermediate relay.

[0008] Specifically, the static core has a truncated cone-shaped engaging portion at one end, and the movable core has an engaging groove on one end that mates with the engaging portion. The truncated cone-shaped engaging portion of the static core increases the engaging area between the static and movable cores, ensuring more reliable engagement.

[0009] In particular, the coil frame is provided with two positioning bosses that cooperate with the yoke, and the yoke is provided with two positioning grooves that cooperate with the two positioning bosses. The two positioning bosses engage in the two positioning grooves, forming a snap-fit connection between the yoke and the coil frame. The snap-fit connection between the coil frame and the yoke facilitates assembly of the two and improves assembly efficiency.

[0010] In particular, two snap-fit holes are provided on the housing corresponding to the two positioning bosses. The two positioning bosses are inserted into the two snap-fit holes, forming a snap-fit engagement between the two positioning bosses and the housing. The housing and the positioning bosses of the coil frame are assembled using a snap-fit engagement, thereby facilitating assembly of the housing and the coil frame and making assembly more convenient.

[0011] In particular, the housing is provided with two stopper ridges on either side of the yoke, with a clamping groove formed between the two stopper ridges. The yoke engages within the clamping groove, forming a snap-fit connection between the housing and the yoke. This snap-fit connection between the yoke and the housing facilitates assembly of the electromagnetic assembly and the housing, making assembly more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1This is a three-dimensional diagram of an embodiment of the present utility model.

[0013] Figure 2 This is a cross-sectional view of an embodiment of the present invention.

[0014] Figure 3 This is an exploded view of an embodiment of the present utility model. DETAILED DESCRIPTION

[0015] like Figures 1 to 3 As shown, an embodiment of the utility model is a high-reliability intermediate relay, including a base plate 10, an electromagnetic assembly 20 arranged on the base plate 10, a transmission assembly 30, and a plurality of micro switches 11, wherein the electromagnetic assembly 20 includes a yoke 21 arranged on the base plate 10, a coil frame 22 arranged in the yoke 21, a coil 23 arranged on the coil frame 22, a static iron core 24 arranged in the coil frame 22, and a moving iron core 25 arranged in the coil frame 22 and matched with the static iron core 24, the transmission assembly 30 includes a shell 31 arranged on the yoke 21, a top plate 32 slidably arranged in the shell 31 and linked with the moving iron core 25, the plurality of micro switches 11 are respectively arranged on the shell 31, and the top plate 32 moves with the moving iron core 25 and triggers the plurality of micro switches 11 to realize the connection or disconnection of the plurality of micro switches 11. The top plate 32 has two guide rods 321 at both ends, and the housing 31 is provided with a guide hole 311 that matches the guide rod 321. The guide rod 321 is inserted into the guide hole 311 and constitutes a sliding connection between the guide rod 321 and the housing 31. The guide hole of the housing guides the top plate, thereby ensuring that the top plate can operate reliably, which is beneficial to improving the working reliability of the intermediate relay. One end of the static iron core 24 has a frustum-shaped attraction portion 240, and one end of the moving iron core 25 is provided with an attraction groove 250 that matches the attraction portion 24. The attraction portion of the static iron core adopts a frustum-shaped structure design, which can increase the attraction area of the static iron core and the moving iron core, thereby ensuring that the attraction of the static iron core and the moving iron core is more reliable.

[0016] like Figure 2 、 3As shown, the coil frame 22 is respectively provided with two positioning bosses 221 that cooperate with the yoke 21, and the yoke 21 is provided with two positioning grooves 211 that cooperate with the two positioning bosses 221. The two positioning bosses 221 are engaged in the two positioning grooves 211, and constitute a snap-fitting fit between the yoke 21 and the coil frame 22. The coil frame and the yoke are assembled in a snap-fitting manner, which facilitates the assembly of the coil frame and the yoke and improves the assembly efficiency. Two snap-fitting holes 312 are respectively provided on the shell 31 corresponding to the two positioning bosses 221. The two positioning bosses 221 are inserted into the two snap-fitting holes 312, and constitute a snap-fitting fit between the two positioning bosses 221 and the shell 31. The positioning bosses of the shell and the coil frame are assembled in a snap-fitting manner, which facilitates the assembly of the shell and the coil frame and is more convenient. The housing 31 is provided with two stopper ridges 313 on either side of the yoke 21. A clamping groove 310 is formed between the two stopper ridges 313. The yoke 21 engages within the clamping groove 310, forming a snap-fit connection between the housing 31 and the yoke 21. This snap-fit connection between the yoke and the housing facilitates assembly of the electromagnetic assembly and the housing, making assembly more convenient.

[0017] The micro switches of this intermediate relay have a simple and compact structure, are fully sealed and maintenance-free, and have a dustproof rating of IP60. They operate stably and reliably without any poor contact. The transmission component adopts a modular structural design, which is conducive to the modular assembly of the intermediate relay and improves assembly efficiency. The top plate of the transmission component is set in the shell, which can effectively prevent the entry of wind, sand, dust, and oil, and prevent the top plate from getting stuck. The electromagnetic component triggers multiple micro switches through the top plate, thereby ensuring the synchronization of the actions of multiple micro switches and improving operational reliability. Therefore, this intermediate relay has the advantages of simple structure, stable and reliable performance, low failure rate, convenient assembly, good protection performance, and high reliability.

Claims

1. A high-reliability intermediate relay, characterized by: It includes a base plate, an electromagnetic component arranged on the base plate, a transmission component, and multiple micro switches. The electromagnetic component includes a yoke arranged on the base plate, a coil frame arranged in the yoke, a coil arranged on the coil frame, a static iron core arranged in the coil frame, and a moving iron core arranged in the coil frame and matched with the static iron core. The transmission component includes a shell arranged on the yoke, a top plate slidably arranged in the shell and linked with the moving iron core. The multiple micro switches are respectively arranged on the shell. The top plate moves with the moving iron core and triggers the multiple micro switches to realize the connection or disconnection of the multiple micro switches.

2. The high-reliability intermediate relay according to claim 1, characterized in that: The top plate has two guide rods at both ends, and the shell is provided with guide holes matched with the guide rods. The guide rods are inserted into the guide holes, and a sliding connection is formed between the guide rods and the shell.

3. The high-reliability intermediate relay according to claim 1 or 2, characterized in that: One end of the static iron core is provided with a frustum-shaped attraction portion, and one end of the moving iron core is provided with an attraction groove matched with the attraction portion.

4. The high-reliability intermediate relay according to claim 1 or 2, characterized in that: The coil frame is respectively provided with two positioning bosses that match the yoke, and the yoke is provided with two positioning grooves that match the two positioning bosses. The two positioning bosses are engaged in the two positioning grooves, and constitute a snap-fit between the yoke and the coil frame.

5. The high-reliability intermediate relay according to claim 4, characterized in that: Two snap-fit holes are respectively provided on the shell corresponding to the two positioning bosses. The two positioning bosses are inserted into the two snap-fit holes, and form a snap-fit fit between the two positioning bosses and the shell.

6. The high-reliability intermediate relay according to claim 1 or 2, characterized in that: Two limiting convex strips are provided on the shell at the two sides corresponding to the yoke iron, and a clamping groove is formed between the two limiting convex strips. The yoke iron is clamped in the clamping groove, and the shell and the yoke iron are clamped together.

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