CN113851354A - Large current electromagnetic switch - Google Patents

Abstract

The invention discloses a high-current electromagnetic switch, which aims to solve the technical problems of inaccurate sampling, complex structure and insufficient sealing performance of the conventional device. The invention comprises a shell, a coil, a contact and a binding post, wherein the binding post is arranged at the top of the shell and comprises an exposed part positioned outside the shell and an embedded part positioned in the shell, the coil and the contact are arranged in the shell, the contact and the embedded part of the binding post are correspondingly arranged, the coil is used for attracting the contact to separate the contact from the binding post, the invention also comprises an isolation bin, a control panel and a sensor assembly, the isolation bin is arranged on the side surface of the shell, the control panel is arranged in the isolation bin, the sensor assembly is arranged in the shell, and a connecting wire of the sensor assembly penetrates through the side surface of the shell and is connected with the control panel. The invention has the beneficial effects that: compact structure, the leakproofness is strong, and it is accurate to detect data, and adaptive capacity to environment is strong.

Description

Large current electromagnetic switch

Technical Field

The invention relates to the technical field of vehicle-mounted relays, in particular to a high-current electromagnetic switch.

Background

An electromagnetic switch is a device for controlling the on/off of a circuit, and the circuit is disconnected by separating a contact from a binding post through a coil attraction. In order to detect the working state of the switch, chinese patent publication No. CN103681108A proposes a high current electromagnetic relay, in which a sampling assembly is inserted and fixed on the steps at both sides of an energy-saving high current electromagnetic relay, an electronic sensor circuit board is mounted on the inner wall at one side of the sampling assembly, two temperature sampling connection rings and a current sampling magnetic conduction ring are mounted on the circuit board, which are respectively connected with two wiring copper posts, and a temperature control circuit, a current control circuit, an alarm circuit and a cut-off execution circuit are arranged on the circuit board. Above-mentioned electromagnetic relay detects temperature and electric current through increasing the sampling assembly, but it need pass through the conduction of long copper sheet when detecting the temperature, and temperature gradient is big, and the decay is more serious, influences the accuracy that detects, leads to overall structure more complicated owing to increased spare part moreover, is unfavorable for the product to seal.

Disclosure of Invention

The invention provides a high-current electromagnetic switch, which aims to solve the technical problems of inaccurate sampling, complex structure and insufficient sealing property of the conventional device.

In order to solve the technical problems, the invention adopts the following technical scheme:

the design is a high-current electromagnetic switch, which comprises a shell, a coil, a contact and a binding post, wherein the binding post is arranged at the top of the shell and comprises an exposed part outside the shell and an embedded part inside the shell, the coil and the contact are arranged inside the shell, the embedded part of the contact and the binding post corresponds to each other and is arranged, the coil is used for attracting the contact to separate the contact from the binding post, the high-current electromagnetic switch further comprises a separation bin and a control panel, the separation bin is arranged on the side surface of the shell, the control panel is arranged inside the separation bin, and a connecting wire of the coil penetrates through the side surface of the shell to be connected with the control panel in the separation bin.

Further, still include temperature sensor, temperature sensor includes temperature-sensing portion and wiring portion, and the embedded portion of terminal is hugged closely to temperature-sensing portion, and temperature sensor's wiring portion passes the side of casing and with control panel fixed connection.

Further, still include current sensor and current sampling ring, current sampling ring includes cyclic annular portion and opening, and cyclic annular portion sets up in the embedded portion of terminal, and current sensor sets up in the opening, and current sensor's line passes the side and the control panel electricity of casing and is connected.

Furthermore, a mounting plate is arranged between the contact and the coil, a splicing groove is arranged on the mounting plate, an electric heating block is arranged in the splicing groove, and a connecting line of the electric heating block penetrates through the side face of the shell to be electrically connected with the control panel.

Furthermore, a contact pin is arranged on the side face of the control panel, a protective cover is arranged on the outer side of the contact pin, and the protective cover is fixedly connected with the isolation bin.

Furthermore, the bottom of the control panel is provided with a pin which is connected with the outside, and the pin penetrates through and is fixed on the side surface of the shell and is used for being connected with an electric component inside the shell.

Furthermore, sealant is filled in the isolation bin, a cover plate is arranged at the top of the isolation bin, and the cover plate is connected with the isolation bin in a buckling mode, so that the sealing performance is guaranteed.

Furthermore, the binding post is sleeved with a circular copper sheet, the tail end of the copper sheet is connected with a conductive contact pin, and the conductive contact pin penetrates through the side face of the shell and is electrically connected with the control board.

Compared with the prior art, the invention has the beneficial technical effects that:

1. according to the invention, the isolation bin is arranged on the side surface of the device, the control board originally positioned in the shell is transferred into the isolation bin, and the detection circuit is arranged on the control board to form an integrated design, so that the control board is separated from the internal main circuit, the structure of the device is more reasonable and compact, and the isolation bin is filled with the sealant to ensure the protection performance.

2. According to the invention, the detection components such as the temperature sensor and the current sensor are arranged in the shell and are close to the binding post, and the pins of the detection components penetrate through the side surface of the shell and are connected with the isolation bin and the control panel, so that long copper sheets conducting temperature are omitted, the detection data is more accurate, and the detection data is not interfered by the external environment (part of the original temperature conduction copper sheets are outside the shell and are easily influenced by the environment).

3. The heating block is arranged near the contact, so that the interior of the device can be preheated once the contact meets extremely cold weather, and the contact can not work normally due to icing and other reasons.

4. According to the invention, the contact pin structure is arranged on the side surface of the control panel, because the control panel of the existing device is arranged in the shell, the wiring harness needs to be led out and then the wiring terminal is arranged at the tail end of the wiring harness, the flexible wiring harness is easy to loosen during wiring, and the leading-out end of the wiring harness is not easy to seal, the wiring harness does not need to be led out after the contact pin structure is changed, the structure is simplified, and the contact pin is of a hard structure, so that the sealing is easier to realize.

Drawings

Fig. 1 is a schematic diagram of the mechanism of the high-current electromagnetic switch of the present invention.

Fig. 2 is a right side view of the high current electromagnetic switch of the present invention.

Fig. 3 is one of exploded views of the high current electromagnetic switch of the present invention.

Fig. 4 is a second exploded view of the high current electromagnetic switch of the present invention.

Fig. 5 is a schematic diagram of the internal connection of the high current electromagnetic switch according to the present invention.

Fig. 6 is a second schematic diagram of the internal connection of the high current electromagnetic switch of the present invention.

In the figure, a shell 1, a bottom plate 2, a binding post 3, a copper sheet 4, a mounting plate 5, a contact 6, a spring 7, an electric heating block 8, a control circuit board 9, a coil 10, an isolation bin 11, a cover plate 12, a temperature sensor 13, a current sensor 14, a current sampling ring 15, a plug-in groove 16, a protective cover 17, a connecting pin 18, a plug pin 19 and a fixing screw 20.

Detailed Description

The following examples are intended to illustrate the present invention in detail and should not be construed as limiting the scope of the present invention in any way.

Example 1: a high-current electromagnetic switch, see fig. 1 to 5, comprises a shell 1, a coil 10 and a contact 6 are arranged inside the shell 1, the contact 6 comprises a conductive transverse plate and protrusions at two ends, a spring 7 is connected below the conductive transverse plate, and an insulating mounting plate 5 is arranged between the spring 7 and the coil 10. A terminal 3 is mounted on the top surface of the housing 1, and the terminal 3 penetrates the top surface of the housing 1 and is fixed thereto. When the switch is switched on, the contact 6 is contacted with the bottom of the binding post 3, at the moment, current passes through the conductive transverse plate of the contact 6 from the binding post on the left side to the binding post on the right side to form a passage, when the switch is required to be switched off, the current is introduced into the coil 10 to generate a magnetic field, the contact 6 is attracted downwards to separate the contact 6 from the binding post 3, and the circuit is cut off.

Set up separation storehouse 11 in the side of casing 1, separate inside vertical installation control circuit board 9 in storehouse 11, installation temperature sensor 13 and current sensor 14 on the side of casing 1 and separation storehouse 11 coincidence, temperature sensor 13 includes temperature probe and contact pin, temperature probe is located the inside and adjacent terminal 3 setting of casing, temperature sensor 13's contact pin is then passed the side of casing 1, this contact pin and casing side are moulded plastics and are connected and make and do not have the gap between the two, the other end of contact pin is then welded on control circuit board 9.

The wiring terminal 3 is also connected with a current sampling ring 15, the current sampling ring 15 is made of iron, the tail end of the current sampling ring is in an opening shape, parallel induction sheets are arranged at the opening, a current sensor 14 is arranged between the parallel induction sheets, the induction end of the current sensor 14 is arranged in the shell, and a contact pin of the current sensor and the temperature sensor 13 penetrate through the side face of the shell to be connected with the control circuit board 9. If the current sensor 14 detects an abnormal current, the control circuit board 9 can timely shut off the circuit. The two binding posts 13 are sleeved with annular copper sheets 4, the tail ends of the copper sheets are connected with conductive pins, and the conductive pins penetrate through the side face of the shell and are electrically connected with the control circuit board 9. Whether current passes through the wiring terminal 3 is detected through the copper sheet 4, and therefore the on-off state of the circuit is judged.

An electric heating block 8 is arranged in the shell 1, the electric heating block 8 is arranged on a plug-in groove 16 on the mounting plate 5, and a connecting wire of the electric heating block 8 penetrates through the side surface of the shell to be connected with the control circuit board 9. When temperature sensor 13 detected extremely cold weather, start electric heating piece 9 and can preheat the device inside, prevent to freeze between contact 6 and the terminal 3 and lead to the unable normal contact of the two.

The bottom of the control circuit board 9 is provided with a connecting pin 18, and the connecting pin 18 penetrates through the side surface of the shell 1 and extends into the shell 1 to be connected with the internal electric components such as the coil 10 and the electric heating block 9. A pin 19 is fixed on the upper side of the control circuit board 9, and the pin 19 is used for connecting with an external input terminal to provide power supply and control signals for the switch. A protective cover 17 is arranged outside the pin 19, and the protective cover 17 is fixedly connected with the isolation bin 11. The contact pin 19 and the protective cover 17 form a wiring terminal, the traditional wiring harness structure is replaced, the installation is convenient, and the sealing performance is stronger.

During manufacturing, sealant is poured into the isolation cabin 11, then the top of the isolation cabin 11 is sealed with the cover plate 12, sealing performance is guaranteed, and in addition, the shell 1 and the bottom plate 2 are also provided with sealing rings and then connected through the fixing screws 20.

Example 2: referring to fig. 6, the same as embodiment 1, except that the circuit board may be designed in two pieces, i.e., a control board 91 and a detection board 92, the control board 91 is vertically disposed and the detection board 92 is horizontally disposed, and the wiring manner may be adjusted according to actual conditions.

Example 3: on the basis of embodiment 1, the copper sheet 4, the current sampling ring 15, the temperature sensor 13 and the current sensor 14 are omitted, that is, all detection elements are removed, only the main structure of the switch is reserved, including the shell 1, the isolation bin 11, the control circuit board 9, the contact pin 19, the cover plate 12, the coil 10, the contact 7 and the binding post 3 in the shell 1, so that the cost can be saved, the isolation bin is utilized to isolate the circuit board from the contacts in the shell, and the moisture in the glue injected by the circuit board is prevented from being diffused into the contact bin.

Example 4: the difference from embodiment 3 is that only the copper sheet 4, the current sampling ring 15 and the current sensor 14 are omitted, the temperature sensor and the electric heating block are still reserved, the internal temperature of the switch is controlled, and the switch performance reduction caused by overheating and over-cold is avoided.

While the present invention has been described in detail with reference to the drawings and the embodiments, those skilled in the art will understand that various specific parameters in the above embodiments can be changed without departing from the spirit of the present invention, and a plurality of specific embodiments are formed, which are common variation ranges of the present invention, and will not be described in detail herein.

Claims (8)

1. The utility model provides a large current electromagnetic switch, includes casing, coil, contact, terminal, the terminal set up in the top of casing, it is including being located the outer portion that exposes of casing and being located embedded portion in the casing, the coil with the contact set up in inside the casing, the contact with the embedded portion of terminal corresponds the setting, the coil is used for attracting the contact makes it with the terminal separation, its characterized in that still includes separation storehouse, control panel, separation storehouse set up in the side of casing, the control panel set up in inside the separation storehouse, the coil by pass the wire of casing side with the control panel electricity is connected.

2. The high-current electromagnetic switch according to claim 1, further comprising a temperature sensor, wherein the temperature sensor comprises a temperature sensing portion and a wiring portion, the temperature sensing portion is tightly attached to the embedded portion of the wiring terminal, and the wiring portion of the temperature sensor penetrates through the side face of the housing and is fixedly connected with the control board.

3. The high-current electromagnetic switch according to claim 1, further comprising a current sensor and a current sampling ring, wherein the current sampling ring comprises a ring portion and an opening portion, the ring portion is disposed on the embedded portion of the terminal, the current sensor is disposed in the opening portion, and a connection wire of the current sensor passes through a side surface of the housing and is electrically connected to the control board.

4. A high current electromagnetic switch according to claim 1, wherein a mounting plate is provided between said contact and said coil, said mounting plate is provided with a plug groove, said plug groove is provided with an electric heating block, and a connection wire of said electric heating block passes through a side surface of said housing to be electrically connected with said control board.

5. The high-current electromagnetic switch according to claim 1, wherein a pin is disposed on a side surface of the control board, a protective cover is disposed on an outer side of the pin, and the protective cover is fixedly connected with the isolation bin.

6. A high current electromagnetic switch according to claim 1, wherein the bottom of said control board is provided with pins connected to the outside, and said pins are passed through and fixed on the side of said housing for connecting with the electric parts inside said housing.

7. The high-current electromagnetic switch according to claim 1, wherein the isolation chamber is filled with a sealant, a cover plate is disposed on the top of the isolation chamber, and the cover plate is connected to the isolation chamber by a snap-fit connection.

8. The high-current electromagnetic switch according to claim 1, wherein a circular copper sheet is sleeved on the binding post, the tail end of the copper sheet is connected with a conductive pin, and the conductive pin penetrates through the side surface of the shell to be electrically connected with the control board.

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