A relay

Abstract

A relay includes a housing support assembly, a coil assembly, a stop assembly, a plunger shaft assembly, a reset spring, and a support cover assembly; the coil assembly includes: a skeleton, a static iron core, a coil, and a positive terminal; wherein, the skeleton is also provided with at least one skeleton groove, one end of the positive terminal is fixed to the skeleton through the skeleton groove, the other end of the positive terminal is connected to the coil, the depth direction of the skeleton groove is the same as the moving direction of the plunger shaft assembly, and the positive terminal is fixed in the skeleton groove; the skeleton is also provided with a receiving groove, and the depth direction of the skeleton receiving groove is the same as the depth direction of the skeleton groove. The relay disclosed by the present invention has a coil induction voltage suppression device connected in parallel at both ends of the coil, so the induced voltage generated at the moment of power failure of the coil can be effectively suppressed, thereby increasing the applicability of the relay.

Description

Technical Field

[0001] The invention relates to the field of relays, and in particular to a relay for a starter. Background Art

[0002] Since the size of the starter relay used in the current starter is relatively large, such as the Chinese patent 201621084847.3 Figure 3 The relay shown (not shown in this application), especially the relay support cover, has a relatively large radial dimension. After being assembled on the starter, the overall dimension of the starter is relatively large, which is not conducive to the variant application of the starter. For different applications of the starter, it is often necessary to adjust the installation position of the relay to ensure that the starter can be smoothly assembled on the engine. In this way, it is necessary to develop a variety of different drive end covers, which will prolong the development cycle of the starter and increase the development cost, which is not conducive to the application and promotion of the starter product.

[0003] In addition, with the development of engine electronic control technology, vehicles began to use electronic control units ECU / ECM to directly control the starter relay on the starter. The ECU / ECM collects various signals from the engine and determines the on and off of the starter relay on the starter after judging each signal. However, since the current carrying capacity of the terminals on the ECU / ECM that control the on and off of the relay is limited, the operating current of the relay coil is required to be smaller (such as less than 1.5A), that is, the coil resistance of the coil is larger.

[0004] In view of the above problems, Chinese Patent No. 201210078648.1 proposes an electromagnetic switch solution, namely a relay solution, comprising a switch contact, wherein the switch contact is connected in a circuit, and the circuit is configured to supply current to an electrical load when the switch contact is in a closed state; and a coil assembly, wherein the coil assembly comprises a coil and a plunger, and the plunger is configured to be attracted to the coil along an axial direction by a magnetic force generated by current flowing through the coil, wherein the switch contact comprises a movable contact, a first fixed contact, and a second fixed contact, wherein the movable contact is configured to be axially displaced from a first axial position to a second axial position by the plunger when the magnetic force is generated, wherein the movable contact is separated from each of the fixed contacts in the first axial position, and wherein the movable contact is maintained in contact with the first fixed contact and the second fixed contact in the second axial position, thereby forming the closed state; the relay support cover is fixed to the housing by riveting, and the relay is relatively small in size.

[0005] There is no device to suppress the induced voltage of the suppression coil in the relay. The induced voltage generated by the relay at the moment of power failure is relatively large, which can easily cause great interference to the vehicle's electronic control unit, measuring instruments, audio and other electrical appliances, and even damage related vehicle electronic appliances, such as the vehicle control unit, CAN, etc.

[0006] The relay first inserts the plug-in side into the frame of the coil assembly, and then clamps the enameled wire on the plug-in for welding; and a static iron core forming a magnetic circuit is also embedded in the frame, and the mold of the frame is relatively complex. Only a sealing gasket is set between the plug-in and the support cover, and the sealing effect is unstable.

[0007] In addition, the relay sets the sealing ring between the support cover and the shell at the matching position of the static iron core and the support cover, but because the static iron core on the coil assembly has gaps at the input and output ends, the sealing effect between the support cover and the shell is poor, and effective protection cannot be provided.

[0008] In addition, the wiring terminals on the relay support cover are plug-in connectors. Most customers connect the control line terminals to the relay terminals through the control line terminals, which is inconvenient for customers to connect. Additional wiring terminals need to be added to the starter to connect to the vehicle control line. Summary of the invention

[0009] The problem to be solved by the present invention is to propose a small-volume relay with a coil induced voltage suppression device, simple structure, high protection level, and convenient for customers to connect the wires, in view of the above-mentioned defects of the prior art.

[0010] To achieve the above object, the present invention provides a relay, comprising:

[0011] Shell bracket assembly;

[0012] The coil assembly comprises: a frame installed in the housing support assembly, a static iron core is arranged on the frame, a coil is wound on the frame, and a positive terminal is arranged on the coil assembly;

[0013] The plunger core shaft assembly, the backstop assembly and the return spring are all arranged in the frame, the backstop assembly is directly arranged on the bottom surface of the housing support assembly and corresponds to the coil, and the return spring is arranged between the plunger core shaft assembly and the backstop assembly;

[0014] A support cover assembly, mounted on the housing support assembly, wherein a stationary contact terminal, a movable contact piece and a contact pressure spring are arranged in the support cover assembly, wherein the contact pressure springs are respectively abutted between the support cover assembly and the movable contact piece, wherein the movable contact piece has a contact position and a separation position relative to the stationary contact terminal, and the stationary contact terminals are extended out of the support cover assembly;

[0015] Characterized in that at least one skeleton groove is further provided on the skeleton, one end of the positive terminal is fixed on the skeleton through the skeleton groove, the other end of the positive terminal is connected to the coil, the depth direction of the skeleton groove is the same as the moving direction of the plunger core shaft assembly, and the positive terminal is fixed in the skeleton groove;

[0016] The frame is also provided with a receiving groove, and the depth direction of the receiving groove is the same as the depth direction of the frame groove.

[0017] In the above-mentioned relay, the skeleton groove passes through the static iron core on the skeleton to increase the contact length between the terminal and the skeleton groove; the skeleton groove also has an extension portion for increasing the contact area between the skeleton and the positive terminal and / or negative terminal.

[0018] The above-mentioned relay, wherein the coil assembly also includes a coil induction voltage suppression device, the coil induction voltage suppression device is fixed in the accommodating groove, and a negative terminal is further provided on the coil assembly, and the coil induction voltage suppression device is respectively connected to the positive terminal and the negative terminal fixed on the skeleton groove.

[0019] In the above-mentioned relay, the coil induced voltage suppression device is a diode, a resistor or a TVS tube.

[0020] In the above-mentioned relay, a control terminal is provided on the frame, and a wiring terminal and a lead wiring piece are embedded on the support cover assembly. The lead wiring piece contacts the upper end surface of the control terminal, and the other side of the contact surface between the lead wiring piece and the control terminal is exposed.

[0021] The above-mentioned relay, wherein the support cover assembly is provided with a connector port, the connector port is connected to the connector lead on the vehicle, and the pins of the connector port are respectively connected to the positive terminal and the negative terminal through the wiring pieces pre-buried on the support cover assembly.

[0022] In the above relay, a negative terminal plug-in piece is also pre-buried on the support cover assembly, and the negative terminal plug-in piece is connected to the negative terminal on the coil assembly by welding.

[0023] In the above-mentioned relay, a sealing plug is further provided between the positive terminal and / or negative terminal fixed on the coil assembly and the support cover assembly, and the positive terminal and / or negative terminal is connected to the wiring piece on the support cover assembly by soldering.

[0024] In the above relay, a groove is provided on the entire circumference of the outer diameter of the support cover assembly for placing a sealing O-ring, and after the O-ring is assembled, the entire circle is in contact with the support cover assembly and the housing bracket assembly.

[0025] In the above relay, a plurality of positioning grooves or positioning bosses are circumferentially arranged at the flange riveting positions of the support cover assembly and the housing bracket assembly.

[0026] The beneficial effects of the present invention are:

[0027] 1) The skeleton grooves and the receiving grooves of the coil induction voltage suppression device provided on the skeleton are in the same direction as the movement of the plunger core shaft. Compared with the background technology, the structure of the skeleton and the positive and negative terminals is simpler, the mold cost is relatively low, and the cost of the relay will be lower.

[0028] 2) By adding a coil induction voltage suppression device to the receiving slot, the relay can suppress the induction voltage at the moment of relay power failure, effectively avoiding the interference and damage caused by the relay power failure to the vehicle's electronic control unit, measuring instruments, audio and other electronic appliances, thereby improving the applicability of the relay. In addition, the coil induction voltage suppression device can be added according to customer needs, and the relay does not need to add other components, so it has strong versatility.

[0029] 3) The skeleton groove increases the contact area between the skeleton and the terminal side of the positive terminal and the negative terminal by adding an extension part to improve the fixing effect of the terminal. And by allowing the groove on the skeleton to pass through the static iron core on the skeleton, the axial size of the skeleton is further reduced. And by adding sealing plugs on the positive terminal and the negative terminal, and applying glue on the coil induction voltage suppression device, the vibration resistance of the relay is effectively improved.

[0030] 4) By pre-embedding the control terminal on the support cover, it is convenient for customers to use wiring lugs for wiring. The specifications of the control terminal can be adjusted according to the specifications of the customer's wiring lugs, such as adjusting to M4, M5 or M6 bolts. The support cover mold does not need to be greatly changed, which is convenient for product deformation and application. In addition, a variety of implementation methods are proposed for other customer application needs. For example, when using a connector to control the relay, a plug interface is designed on the relay support cover to facilitate customer wiring; for example, in response to the needs of the insulation circuit relay, a pre-embedded negative terminal plug-in piece is added to the support cover, and the plug-in part of the negative terminal plug-in piece is preferably a standard interface to facilitate the selection of the plug-in piece that plugs into the plug-in piece; the negative terminal plug-in piece is connected to the negative terminal of the starter through a matching plug-in piece.

[0031] 5) A groove is set on the entire circumference of the outer diameter of the support cover for placing the O-ring. After the O-ring is assembled, it can ensure that the entire circle is in contact with the support cover and the shell bracket assembly; a sealing plug is set between the positive terminal, the negative terminal and the support cover, and the positive terminal, the negative terminal and the pre-buried wiring piece on the support cover are connected by soldering, which has a better sealing effect.

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Relay appearance diagram of embodiment 1 of the present invention;

[0034] Figure 2 A cross-sectional view of a relay in accordance with an embodiment of the present invention;

[0035] Figure 3 A cross-sectional view of a support cover assembly according to a first embodiment of the present invention;

[0036] Figure 4 Embodiment 1 of the present invention is a coil assembly (assembly coil induced voltage suppression device);

[0037] Figure 5 A cross-sectional view of a coil assembly according to an embodiment of the present invention;

[0038] Figure 6a , 6b Embodiment 1 of the present invention: a skeleton;

[0039] Figure 7 Embodiment 1 of the present invention provides a support cover;

[0040] Figure 8 Assembly diagram of a sealing plug according to a first embodiment of the present invention;

[0041] Fig. 9 Embodiment 1 of the present invention is a coil assembly (coil-free induced voltage suppression device);

[0042] Fig.10 Embodiment 2 of the present invention is a relay with a plug-in interface;

[0043] Fig.11 Embodiment 2 of the present invention is a support cover with a plug-in interface;

[0044] Fig.12 Embodiment 2 of the present invention: coil assembly (assembly coil induced voltage suppression device);

[0045] Fig.13 The third embodiment of the present invention is a relay with a negative plug-in sheet.

[0046] Among them, the reference numerals

[0047] 1-Support cover assembly

[0048] 11-Support cover

[0049] 111-Support cover body

[0050] 1111-Location groove on the support cover

[0051] 112- (pre-buried) lead lug

[0052] 113- (embedded) control terminal

[0053] 114- (pre-buried) negative terminal lug

[0054] 115- (pre-buried) lead lug assembly with pin I

[0055] 116- (pre-buried) lead lug assembly with pin II

[0056] 12-Static contact terminal (contact bolt)

[0057] 13-Moving contact piece

[0058] 14-Contact pressure spring

[0059] 15-I Sealing ring

[0060] 16-II sealing ring

[0061] 17-Lock washer

[0062] 2-Plunger shaft assembly

[0063] 3-Coil assembly

[0064] 31-Skeleton

[0065] 311-accommodation tank

[0066] 312 skeleton groove

[0067] 3121 (skeleton groove) protruding extension

[0068] 313-static iron core

[0069] 314-Skeleton body

[0070] 315 skeleton groove

[0071] 3151 (skeleton groove) protruding extension

[0072] 32-Positive terminal

[0073] 33-Coil

[0074] 331-coil positive terminal

[0075] 332-Coil negative terminal

[0076] 34-Coil Induction Voltage Suppression Device

[0077] 35-Negative terminal

[0078] 4- Shell bracket assembly

[0079] 5-Return spring

[0080] 6-Retraction assembly

[0081] 7-Sealing plug DETAILED DESCRIPTION

[0082] The structural principle and working principle of the present invention are described in detail below in conjunction with the accompanying drawings:

[0083] Implementation Method 1

[0084] like Figure 1 , 2 As shown, the relay disclosed by the present invention comprises: a support cover assembly 1, a plunger core shaft assembly 2, a coil assembly 3, a housing support assembly 4, a return spring 5, and a stop assembly 6. The stop assembly 6 is directly arranged on the bottom surface of the housing support assembly 4, and a return spring 5 is arranged between the plunger core shaft assembly 2 and the stop assembly 6;

[0085] like Figure 3 As shown, the support cover assembly 1 includes a support cover 11, a static contact terminal (contact bolt) 12, a moving contact piece 13, a contact pressure spring 14, a type I sealing ring 15, a type II sealing ring 16, and a locking washer 17; before the support cover assembly 1 is assembled with the shell support assembly 4 and the coil assembly 3, the contact pressure spring 14 is in a compressed state, and the moving contact piece 13 is in contact with the contact bolt 12; the support cover assembly 1 is assembled with the shell support assembly and the coil assembly through the shell support assembly flanging riveting. After assembly, under the joint action of the reset spring 5 and the contact pressure spring 14, the end face of the contact core shaft assembly contacts the moving contact piece, and the moving contact piece and the contact bolt are in a separated state. A groove is set on the entire circumference of the outer diameter of the support cover for placing the O-ring 16. After the O-ring is assembled, it can ensure that the entire circle is in contact with the support cover and the shell support, so that the sealing effect is better than the background technology.

[0086] like Figure 4 , Figure 5 As shown, the coil assembly 3 includes: a skeleton 31, a coil 33, a positive terminal 32, a negative terminal 35, a coil induction voltage suppression device 34, etc. The skeleton is installed in the housing support assembly 4, a static iron core 313 is provided on the skeleton 31, a coil 33 is wound on the skeleton 31, and a stop assembly 6, a plunger core shaft assembly 2, and a reset spring 5 are provided in the skeleton 31 corresponding to the coil 33. The skeleton 31 is provided with skeleton grooves 312 and 315 for plugging the positive terminal and the negative terminal, and the direction of the skeleton groove is the same as the moving direction of the plunger core shaft of the plunger core shaft assembly 2. The positive terminal 32 and the negative terminal 35 on the coil assembly are respectively inserted into the above-mentioned skeleton grooves 312 and 315, and the positive terminal and the negative terminal are preferably transitionally matched with the skeleton grooves. The two ends of the coil 33 are respectively connected to one end of the positive terminal and one end of the negative terminal.

[0087] In order to further reduce the axial size of the frame and ensure the matching length of the positive terminal, the negative terminal and the frame, the frame grooves 312 and 315 can pass through the static iron core on the frame, such as Figure 5 As shown, the bottom of the skeleton groove is not allowed to exceed the end surface of the skeleton and the enameled wire. The skeleton grooves 312 and 315 are also provided with protruding extensions 3121 and 3151, through which the contact area between the skeleton and the terminal side of the positive terminal 32 and the negative terminal 35 can be increased to improve the fixing effect of the terminal.

[0088] The frame is provided with a receiving groove 311 for the coil induction voltage suppression device, and the direction of the receiving groove 311 is also the same as the direction of the plunger movement. The coil induction voltage suppression device 34 is fixed in the receiving groove 311. The coil induction voltage suppression device and the receiving groove can be clearance fit, transition fit or interference fit, preferably interference fit. As the coil induction voltage suppression device is pressed into the receiving groove, the space of the receiving groove will gradually increase, and the coil induction voltage suppression device will be stuck in the receiving groove for positioning. A static iron core 313 is pre-embedded in the frame, and part of the surface of the static iron core is exposed from the frame, so that the negative end of the coil can be welded to the static iron core, thereby achieving negative grounding.

[0089] Since the depth directions of the skeleton grooves 312, 315 and the receiving groove 311 are the same as the moving direction of the plunger core shaft assembly and are along the axial direction of the skeleton, the mold structure of the skeleton is relatively simple and the mold cost is relatively low.

[0090] After the coil induction voltage suppression device is stuck in the receiving groove, it is connected to the positive terminal 32 and the negative terminal 35 on the coil by welding. The coil induction voltage suppression device 34 can be any one of a diode, a resistor or a TVS tube. In order to better fix and protect the coil induction voltage suppression device 34, sealant can be injected into and around the receiving groove 311. The contacts and grooves of the suppression device are sealed to further fix the positive terminal on the coil assembly and play a sealing role. Figure 4 As shown, for a coil assembly with a coil induced voltage suppression device, the negative end of the coil enameled wire is first welded to the negative terminal 35, and then the enameled wire is welded to the static iron core 313 of the frame, and finally grounded; the negative terminal does not need to extend out of the end face of the support cover.

[0091] like Figure 7As shown, the support cover 11 is composed of a support cover body 111, a lead terminal 112, and a control terminal 113. The lead terminal 112 contacts the upper end surface of the control terminal 113 and is pre-buried in the support cover body 111 together with the end of the control terminal 113. In order to facilitate external wiring, the other side of the contact surface between the lead terminal 112 and the control terminal 113 is exposed. The control terminal 113 can be adjusted according to the specifications of the customer's terminal, such as adjusting to M4, M5 or M6 bolts, and the support cover mold does not need to be greatly changed. The support cover body 111 is riveted and fixed to the shell bracket assembly. Several positioning pits 1111 or bosses can be set at the riveting position to increase the rotational torque between the support cover and the shell bracket assembly after riveting.

[0092] like Figure 8 As shown, a sealing plug 7 is provided between the positive terminal 32 and the negative terminal 35 of the coil assembly 3 and the support cover 11, which is used to further fix the positive terminal 32 and the negative terminal 35 on the coil assembly and play a sealing role. The positive terminal is connected to the lead terminal piece 112 embedded in the support cover body 111 by soldering.

[0093] Before the relay coil is powered on, the movable contact piece 13 and the contact bolt 12 are in a separated state under the joint action of the reset spring 5 and the contact pressure spring 14 (both springs are in a compressed state). When the relay energizes the coil assembly 3 through the control end, the coil generates an electromagnetic magnetic field and magnetizes the static iron core 313. Under the action of the electromagnetic attraction, the plunger core shaft assembly 2 moves in a direction away from the static contact terminal of the relay. Under the joint action of the electromagnetic force, the contact pressure spring 14, etc., the movable contact piece 13 moves toward the static contact terminal until it is fully attracted, and the main contact of the relay is connected. When the current in the coil is disconnected, the coil magnetic field force disappears. Under the action of the reset spring, the movable parts such as the plunger core shaft assembly 2 automatically recover, and the movable contact piece 13 and the contact bolt 12 are disconnected, and the two contact bolts of the relay are disconnected.

[0094] In this embodiment, when there is no need to suppress the coil induced voltage, the coil induced voltage suppression device may not be installed on the coil assembly, and the enameled wire at the negative terminal of the coil may be directly welded to the static iron core, and the negative terminal does not need to be set on the frame. Fig. 9 As shown; the overall dimensions of the relay are the same as those of the relay equipped with the coil induction voltage suppression device.

[0095] Implementation Method 2

[0096] This embodiment provides a relay with a plug-in connector interface, such as Fig.10 , Fig.11As shown, the relay has two lead terminal block assemblies I and II (115 and 116) with pins embedded in the support cover body 111. The two lead terminal block assemblies I and II (115 and 116) with pins are respectively connected to the positive terminal 32 and the negative terminal 35 on the coil assembly 3 by soldering. Similarly, a sealing plug 7 is provided between the positive terminal 32 and the negative terminal 35 of the coil assembly 3 and the support cover body 111, as shown in FIG. Figure 8 As shown, it is used to further fix the positive terminal and negative terminal on the coil assembly and play a sealing role to prevent the positive and negative terminals and enameled wire from breaking due to vibration. Fig.12 As shown, the two ends of the coil are connected to the positive terminal 32 and the negative terminal 35 respectively, and the negative terminal of the coil is connected to the negative terminal of the power supply through the wiring plate assembly 116 embedded in the support cover.

[0097] The other designs of this embodiment are basically the same as those of the first embodiment and will not be described in detail here.

[0098] In this embodiment, when there is no need to suppress the coil induced voltage, the coil induced voltage suppression device may not be installed on the coil assembly.

[0099] Implementation Method 3

[0100] Fig.13 An insulating loop relay proposed in the present invention, compared with implementation mode 1, the support cover assembly 11 of the relay adds a pre-buried negative terminal wiring piece 114, and the plug-in part of the negative terminal wiring piece 114 is preferably a standard interface, such as 6.3mm width and 0.8mm thickness, which is convenient for selecting the plug-in piece that plugs into the negative terminal wiring piece 114; the negative terminal wiring piece 114 is connected to the negative terminal of the starter through a matching plug-in piece.

[0101] The positive terminal 32 and the negative terminal 35 on the coil assembly 3 are respectively connected to the lead terminal piece 112 and the negative terminal terminal piece 114 on the support cover body 111 by soldering.

[0102] Similarly, a sealing plug 7 is provided between the positive terminal 32 and the negative terminal 35 of the coil assembly 3 and the support cover body 111, which is used to further fix the positive terminal and the negative terminal on the coil assembly and play a sealing role to prevent the positive and negative terminals and the enameled wire from breaking due to vibration. Fig.12 As shown, the two ends of the coil are connected to the positive terminal 32 and the negative terminal 35 respectively, and the negative terminal of the coil is connected to the negative terminal of the power supply through the wiring piece 114 embedded in the support cover.

[0103] In this embodiment, when there is no need to suppress the coil induced voltage, the coil induced voltage suppression device may not be installed on the coil assembly.

[0104] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A relay, comprising: Shell bracket assembly; The coil assembly comprises: a frame installed in the housing support assembly, a static iron core is arranged on the frame, a coil is wound on the frame, and a positive terminal is arranged on the coil assembly; The plunger core shaft assembly, the backstop assembly and the return spring are all arranged in the frame, the backstop assembly is directly arranged on the bottom surface of the housing support assembly and corresponds to the coil, and the return spring is arranged between the plunger core shaft assembly and the backstop assembly; A support cover assembly, mounted on the housing support assembly, wherein a stationary contact terminal, a moving contact piece and a contact pressure spring are arranged in the support cover of the support cover assembly, wherein the contact pressure springs are respectively abutted between the support cover and the moving contact piece, wherein the moving contact piece has a contact position and a separation position relative to the stationary contact terminal, and the stationary contact terminals are extended out of the support cover; Characterized in that at least one skeleton groove is further provided on the skeleton, one end of the positive terminal is fixed on the skeleton through the skeleton groove, the other end of the positive terminal is connected to the coil, the depth direction of the skeleton groove is the same as the moving direction of the plunger core shaft assembly, and the positive terminal is fixed in the skeleton groove; The skeleton is also provided with a receiving groove, and the depth direction of the receiving groove is the same as the depth direction of the skeleton groove; the coil assembly also includes a coil induction voltage suppression device, and the coil induction voltage suppression device is fixed in the receiving groove. The coil assembly is also provided with a negative terminal, and the coil induction voltage suppression device is respectively connected to the positive terminal and the negative terminal fixed on the skeleton groove; the negative terminal of the coil is first welded to the negative terminal and then to the static iron core, and part of the surface of the static iron core is exposed from the skeleton to facilitate the welding of the negative terminal of the coil to the static iron core to achieve grounding; Wherein, the skeleton groove passes through the static iron core on the skeleton, and the bottom of the skeleton groove does not exceed the end surface of the skeleton and the coil, so as to increase the contact length between the terminal and the skeleton groove; the skeleton groove also has an extension portion for increasing the contact area between the skeleton and the positive terminal and / or the negative terminal; a sealing plug is also provided between the positive terminal and / or the negative terminal fixed on the coil assembly and the support cover, so as to seal and further fix the positive terminal and the negative terminal; the positive terminal and / or the negative terminal are connected to the wiring piece on the support cover by soldering; The support cover comprises a support cover body, a lead wiring piece and a control terminal, wherein the lead wiring piece is pre-buried in the support cover body together with the end of the control terminal; the control terminal can be adjusted according to the specifications of the wiring piece; The frame is provided with a control terminal, the support cover is pre-embedded with a lead wiring piece, the lead wiring piece is in contact with the upper end surface of the control terminal, and the other side of the contact surface between the lead wiring piece and the control terminal is exposed; A groove is arranged on the entire circumference of the outer diameter of the support cover for placing a sealing O-ring. After the O-ring is assembled, the entire circle is in contact with the support cover and the shell bracket assembly; the support cover body and the shell bracket assembly are fixed by riveting the flanges, and a plurality of positioning grooves or positioning bosses are arranged along the circumferential direction at the riveting positions of the flanges of the support cover body and the shell bracket assembly to increase the rotational torque between the support cover body and the shell bracket assembly after riveting.

2. The relay according to claim 1, characterized in that: The coil induced voltage suppression device is a diode, a resistor or a TVS tube.

3. The relay according to claim 1, characterized in that: The support cover is provided with a connector port, the connector port is connected to the connector lead on the vehicle, and the plug pins of the connector port are respectively connected to the positive terminal and the negative terminal through the wiring pieces pre-buried on the support cover.

4. The relay according to claim 1, characterized in that: A negative terminal plug-in piece is also embedded in the support cover, and the negative terminal plug-in piece is connected to the negative terminal on the coil assembly by welding.

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