WO2023092922A1 - 热过载继电器 - Google Patents

热过载继电器 Download PDF

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Publication number
WO2023092922A1
WO2023092922A1 PCT/CN2022/084652 CN2022084652W WO2023092922A1 WO 2023092922 A1 WO2023092922 A1 WO 2023092922A1 CN 2022084652 W CN2022084652 W CN 2022084652W WO 2023092922 A1 WO2023092922 A1 WO 2023092922A1
Authority
WO
WIPO (PCT)
Prior art keywords
overload relay
thermal overload
straight line
groove
contactor
Prior art date
Application number
PCT/CN2022/084652
Other languages
English (en)
French (fr)
Inventor
叶扬
肖体锋
王彬鸣
林铸鑫
胡建国
岳喜雷
李伟
卢晨磊
于雪峰
Original Assignee
浙江正泰电器股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202122888575.XU external-priority patent/CN217444301U/zh
Priority claimed from CN202122885872.9U external-priority patent/CN217444300U/zh
Application filed by 浙江正泰电器股份有限公司 filed Critical 浙江正泰电器股份有限公司
Priority to EP22897023.2A priority Critical patent/EP4318530A1/en
Publication of WO2023092922A1 publication Critical patent/WO2023092922A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/01—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections

Definitions

  • the utility model relates to the field of low-voltage electrical appliances, in particular to a thermal overload relay.
  • the normally closed contact of the thermal overload relay is connected to the coil terminal A1 and the coil terminal A2 of the contactor respectively, and the 14NO/22NC normally open terminal of the contactor is connected in series with the normally closed contact of the thermal overload relay to realize the automatic contactor. Keep functioning.
  • the 14NO/22NC wiring port of the contactor is not connected in series with the normally closed contact of the thermal overload relay in some special cases, and it can also be used for other functions.
  • the existing small thermal overload relays not only cannot be directly connected to the contactor, the small thermal overload relay needs to be inserted and used with the small contactor, which will cause the small thermal overload relay to connect the coil terminal A2 of the contactor to the 14NO/22NC wiring port Covering, causing wiring difficulties and reducing user experience.
  • the internal wire routing of the existing small thermal overload relay is complicated, and the electrical distance and creepage clearance between the wires cannot meet the requirements.
  • the purpose of the utility model is to overcome the defects of the prior art and provide a thermal overload relay which is convenient for wiring and can be directly connected to a contactor.
  • a thermal overload relay comprising a casing and a main circuit, a heating protection system, an operating mechanism and a control circuit respectively arranged in the casing, the casing is provided with a first straight line, and the incoming line end of the main circuit is set There is an incoming wire lead part protruding out of the housing, the first straight line includes a first contact part connected to the control circuit, and a first lead part extending out of the housing, one end of the first straight line is connected to the The above control circuit is connected, the first lead part and the lead part of the incoming line end of the main circuit are arranged on the same side of the housing for connecting the coil of the contactor, the heating protection system triggers the operating mechanism when overloaded, and the operating mechanism operates to drive the control circuit Disconnect power to the first straight line.
  • the housing is provided with a second auxiliary terminal and a second direct connection line, one end of the second direct connection line is connected to the second auxiliary terminal, and the other end of the second direct connection line extends out of the housing
  • the third auxiliary terminal for connecting the contactor.
  • the second direct connection line includes a second contact portion connected to the second auxiliary terminal of the thermal overload relay, and a second lead portion protruding from the casing, the first lead portion, the second lead portion and The lead part of the incoming line end of the main circuit is arranged on the same side of the housing; Both the auxiliary terminal and the connection terminal of the outlet terminal are arranged on the other side of the casing.
  • the outer sides of the first straight line and/or the second straight line are respectively wrapped with insulating layers.
  • the thermal overload relay is provided with a first auxiliary terminal connected to the control circuit, the first straight line is connected to the first auxiliary terminal;
  • the housing is provided with a fixing seat for installing the operating mechanism , the first auxiliary terminal and the operating mechanism are respectively arranged on both sides of the fixing seat, the fixing seat is provided with a first limiting hole, and the first straight line is provided with a limiting hole passing through the first limiting hole. bit portion, and the limiting portion is limitedly matched with the first limiting hole.
  • the first straight line is provided with at least two first bent sections and second bent sections which are respectively bent, and the first bent section and the second bent section are spaced apart to form a straight section , a first folding section and a second folding section are respectively formed outside the first bending section and the second bending section, and the second folding section is overlapped on the bottom side of the straight section to form a limiting hole matched with the first limiting hole. position, the first folded section straddles the fixing seat from the outside and connects with the first auxiliary terminal
  • a reset button and a stop button are respectively provided on the fixed seat, and a first groove and a second groove are respectively provided on the fixed seat for accommodating the reset button and the stop button, and the first limiting hole It is arranged on the side of the first groove away from the second groove.
  • the reset button includes a pivoting portion, and an operating portion and a swinging portion respectively disposed at both ends of the pivoting portion, and the swinging portion includes a first swinging arm and a second swinging arm protruding radially, respectively.
  • a swing groove is formed between the first swing arm and the second swing arm;
  • a swing groove and a second swing groove, a swing protrusion cooperating with the swing groove is arranged between the first swing arm and the second swing arm, and the first limiting hole is arranged in the first groove away from
  • the side wall of the second groove is located on the side of the first swinging groove away from the second swinging groove.
  • the first contact portion of the first straight line is connected to the normally closed contact of the control circuit
  • the heating protection system includes multiple sets of bimetallic strips, and two sets of guide plates respectively matched with multiple sets of bimetallic strips , the two sets of guide plates cooperate with the differential lever respectively, the bimetal sheet bends to both sides and pushes the different guide plates respectively during overload and phase failure, the operating mechanism is driven by the differential lever movement, and the normally closed contact is broken or closed by the operating mechanism Keep.
  • the second straight line includes a first connecting portion and a second connecting portion connected by bending at one end, and a second contacting portion and a second
  • the lead part; the shell is provided with a baffle, and an upper cavity and a lower cavity are respectively formed on both sides of the baffle, and the operating mechanism and the heating protection system are respectively arranged in the upper cavity and the lower cavity.
  • the first connecting portion of the two straight lines is arranged in the lower cavity, one end of the second connecting portion of the second straight line is set in the upper cavity, and the other end of the second connecting portion extends into the lower cavity to connect with the first connecting portion.
  • part connection; the heating protection system is arranged at one end of the lower cavity, and is spaced from the other end of the lower cavity to form a side cavity, and the side cavity is provided with a limiter for limiting the second straight line structure.
  • the limit structure includes a connected limit horizontal plate and a limit vertical plate.
  • a second limiting hole is formed between the limiting riser, the side wall of the housing, and the baffle, and the first connecting portion of the second straight line passes through the second limiting hole and connects with the second limiting hole.
  • Hole limit fit; the baffle is provided with at least one pair of spaced apart ribs, and a limit slot is provided between the pair of spacer ribs, and the limit slot is used to limit the first Two connecting parts.
  • the housing is provided with a fixing seat for installing the operating mechanism.
  • the housing includes a base and a side cover installed on one side of the base.
  • the side cover is provided with an avoidance hole for avoiding heat.
  • the main circuit wire of the overload relay, a supporting piece is installed between the side cover and the operating mechanism, and the supporting piece is connected to the fixing seat. wire structure; the supporting member is provided with a wire routing structure for limiting the second direct connection.
  • the wiring structure includes two limiting ribs arranged opposite to each other.
  • the supporting member includes two connecting plates oppositely arranged, and a supporting plate connected between one ends of the two connecting plates, and the ends of the two connecting plates away from the supporting plates are respectively connected to the fixing seat, and the two connecting plates are connected to each other.
  • An escape groove for avoiding the operating mechanism is formed between the connection plate and the support plate, and the wiring structure is arranged on the side of the support plate close to the side cover.
  • a connection structure between a thermal overload relay and a contactor which includes the contactor and the thermal overload relay, the lead part and the first lead part of the incoming line end of the thermal overload relay are inserted into the connection terminal of the contactor for connection and cooperation, the first The lead part is connected to the coil of the contactor through the connection terminal of the contactor.
  • the thermal overload relay of the utility model by setting the first straight line connected with the control circuit in the housing, makes the control circuit directly connected with the coil of the contactor through the first straight line, which can reduce the wiring steps and does not need to
  • the line is additionally wired, which has the characteristics of convenient wiring.
  • Figure 1-3 is a schematic diagram of the cooperation between the thermal overload relay and the contactor of the present invention
  • Fig. 4 is a structural schematic diagram of a thermal overload relay of the present invention.
  • Fig. 5 is another structural schematic diagram of the thermal overload relay of the present invention.
  • Fig. 6 is a schematic structural view of the utility model fixing seat
  • Fig. 7 is a structural schematic diagram of the first straight line of the present invention.
  • Fig. 8 is a structural schematic diagram of the second direct connection line of the present invention.
  • Fig. 9 is a schematic structural view of the connecting sheet of the present invention.
  • Fig. 10 is a structural schematic diagram of the utility model housing
  • Fig. 11 is a structural schematic diagram of the first main circuit wire of the utility model
  • Fig. 12 is an exploded view of the housing of the utility model
  • Fig. 13 is a schematic structural view of the utility model side cover
  • Figure 14 is a schematic structural view of the utility model base
  • Fig. 15 is a schematic diagram of the utility model self-holding circuit
  • Fig. 16 is a schematic structural view of the support of the utility model.
  • thermal overload relay 5 of the present invention is not limited to the description of the following embodiments.
  • the thermal overload relay 5 of the present utility model includes a housing and a main circuit respectively arranged in the housing, a heating protection system 7, an operating mechanism 8 and a control circuit.
  • the main circuit of the thermal overload relay 5 is used for Connected to the main circuit of the contactor 6, the housing is provided with a first direct line 1, one end of the first direct line 1 is connected to the control circuit, and the other end of the first direct line 1 extends out of the housing It is used to connect the coil of the contactor 6.
  • the thermal protection system 7 triggers the operating mechanism 8, and the operating mechanism 8 operates to drive the control circuit to cut off the power supply of the first direct line 1, so that the coil of the contactor 6 is released, and then the contactor The main circuit of 6 and the main circuit of thermal overload relay 5 are disconnected.
  • the control circuit is directly connected to the coil of the contactor 6 through the first straight line 1, which can reduce the wiring steps and avoid Additional wiring is required for the control circuit, which is convenient for wiring.
  • the housing is provided with a second auxiliary terminal 65 and a second direct connection line 2, one end of the second direct connection line 2 is connected to the second auxiliary terminal 65, and the second direct connection line 2
  • the other end of the connecting wire 2 protrudes from the housing for connecting the third auxiliary terminal 66 of the contactor 6, and the second auxiliary terminal 65 is used for connecting a self-holding circuit (not shown in the figure), and the self-holding circuit can pass through the first Two straight lines 2 locked.
  • the first straight line 1 includes a first contact portion 11 connected to the control circuit of the thermal overload relay 5, and a first lead portion 12 protruding from the housing
  • the second straight line 2 includes a The second contact part 21 connected to the second auxiliary terminal 65 of the thermal overload relay 5, and the second lead part 22 protruding from the casing
  • the incoming line end of the main circuit is provided with an incoming line end lead part extending out of the casing
  • the first lead part 12 and the second lead part 22 are arranged on the same side of the casing as the lead part of the incoming line of the main circuit
  • the lead part of the incoming line of the thermal overload relay, the first lead part 12 and the second lead Part 22 is inserted into the connection terminal of the contactor for connection and cooperation.
  • the second lead part 22 is connected to the third auxiliary terminal 66 of the contactor, and the third auxiliary terminal 66 is connected to the normally open or normally closed auxiliary contact of the contactor 6, and the connection with the thermal overload relay 5 can be completed on one side of the thermal overload relay 5.
  • the wiring of the contactor 6 is very convenient.
  • the first lead part 12 is connected to the A1 terminal or the A2 terminal of the contactor, and is connected to the coil of the contactor 6 through the connection of the A1 terminal or the A2 terminal.
  • the first contact portion 11 of the first straight line 1 of this embodiment is connected to the first auxiliary terminal 64 of the thermal overload relay 5, and the first auxiliary terminal 64 is connected to the normally closed contact of the control circuit of the thermal overload relay 5.
  • the first lead part 12 of the straight line 1 is connected to the A1 terminal or the A2 terminal of the contactor, and is connected to the coil of the contactor 6 through the connection of the A1 terminal or the A2 terminal, thereby realizing the connection between the coil of the contactor 6 and the thermal overload relay
  • the direct connection of the normally closed contact of 5; the normally closed contact of the control circuit is used to control the energization and de-energization of the coil of the contactor 6, when the normally closed contact of the control circuit is broken, the coil of the contactor 6 is de-energized and released , so that the main circuit of the contactor 6 and the main circuit of the thermal overload relay 5 are disconnected.
  • the second contact portion 21 of the second direct connection line 2 in this embodiment is connected to the second auxiliary terminal 65 of the thermal overload relay 5, the second auxiliary terminal 65 is a 14NO/22NC terminal, and the second auxiliary terminal 65 is connected to the To maintain the circuit, the second lead part 22 of the second straight line 2 is connected to the third auxiliary terminal 66 of the contactor 6, the third auxiliary terminal 66 is a 13NO terminal or a 14NO terminal, and the third auxiliary terminal 66 is connected to the normal Open or normally closed auxiliary contact connection, and then realize that the second auxiliary terminal 65 of the thermal overload relay 5 is connected with the normally closed or normally open auxiliary terminal of the contactor 6, so that after the thermal overload relay 5 is plugged and electrically connected with the contactor,
  • the connection with the contactor 6 is realized directly from the end of the thermal overload relay 5 without wiring from the end of the contactor 6, and the wiring is more convenient and can ensure that it does not interfere with the original conductive wire of the thermal overload relay 5, and has enough safe climbing Electrical distances and electrical clearances.
  • the contactor 6 includes a main circuit connection terminal respectively connected to the main circuit of the contactor 6, an A1 terminal and an A2 terminal respectively connected to the coil of the contactor 6, and a normally closed or normally open auxiliary wiring of the contactor.
  • the 13NO terminal or 14NO terminal connected by the terminal, the lead part of the incoming line end of the thermal overload relay 5 is connected with the main circuit terminal of the contactor.
  • This embodiment is a three-phase thermal overload relay 5, including three sets of main circuits, three sets of main circuits Corresponding to three groups of main circuit wires, the three groups of main circuit wires are respectively the first main circuit wire 31, the second main circuit wire 32 and the third main circuit wire 33, and the lead wires of the incoming wires of the three groups of main circuits are the first incoming wires respectively.
  • the line terminal 91, the second line terminal 92 and the third line terminal 93, the first line terminal 91, the second line terminal 92 and the third line terminal 93 are respectively used to connect the three main circuits of the contactor 6
  • the connecting terminals namely 6/T3 terminal 61, 4/T2 terminal 62 and 2/T1 terminal 63 in the figure, the first lead part 12 is connected to the A2 terminal of the contactor, and the second lead part 22 is connected to the contactor
  • the 14NO/22NC terminal connection of the device, the first lead part 12, the second lead part 22, the first incoming line end 91, the second incoming line end 92 and the third incoming line end 93 are arranged on the same side of the housing .
  • the outgoing line end of the main circuit of the thermal overload relay 5 is provided with an outgoing line terminal, the outgoing line terminal and the incoming line lead are respectively located on both sides of the housing, and the second auxiliary terminal 65 and the outgoing line terminal are both set on the other side of the housing.
  • the outgoing terminal terminals of the thermal overload relay 5 are respectively 2/T1 terminal, 4/T2 terminal, and 6/T3 terminal, and the second auxiliary terminal 65 is arranged side by side with the outgoing terminal terminal.
  • the fixing base 80 is provided with a first limiting hole 35 , and the first contact portion 11 and the first lead portion 12 of the first straight line 1 are respectively located on both sides of the fixing base 80 .
  • the middle part of the first straight line 1 is provided with a limiting portion 13 passing through the first limiting hole 35 , and the limiting portion 13 is limitedly engaged with the first limiting hole 35 .
  • the detachment-free installation is realized through the cooperation of the limiting part 13 and the first limiting hole 35, which is not only convenient for installation, but also can be realized only by the structural features of the part itself.
  • the first auxiliary terminal 64 and the operating mechanism 8 are respectively arranged on both sides of the fixing seat 80, and the middle part of the first straight line 1 is provided with at least two first bending sections 141 which are respectively bent and formed. and the second bending section 142, the straight section 15 is formed at intervals between the first bending section 141 and the second bending section 142, and the first bending section 141 and the second bending section 142 are respectively formed outside the first bending section 141 and the second bending section 142.
  • a folded section 151 and a second folded section 152, the second folded section 152 is overlapped on the bottom side of the straight section 15 to form a stopper 13, the first folded section 151 crosses the fixing seat 80 from the outside, and passes through the second A contact portion 11 is connected to the first auxiliary terminal 64 .
  • the shape of the limiting portion 13 can also be adjusted, and can also be bent more times.
  • the limiting part 13 can also be a linear structure, which directly passes through the first limiting hole 35 , all of which belong to the protection scope of the present invention.
  • the fixed seat 80 is provided with a reset button 81 and a stop button 82 respectively, the reset button 81 is used for resetting after the thermal overload trip protection of the product, and the stop button 82 is used for the emergency disconnection of the product.
  • the reset button 81 and the stop button 82 are respectively used to accommodate the reset button 81 and the stop button 82 and the first groove 810 and the second groove 820.
  • the first limiting hole 35 is arranged on the first groove 810 away from the second groove. One side of the groove 820.
  • the reset button 81 includes a pivoting portion 811, and an operating portion 812 and a swinging portion 813 respectively disposed at both ends of the pivoting portion 811.
  • the operating portion 812 extends out of the first groove 810 for operation
  • the swinging portion 813 includes a first swing arm and a second swing arm protruding radially respectively, a swing groove (not shown in the figure) is formed between the first swing arm and the second swing arm, and the first groove 810
  • a first swing groove 816 and a second swing groove 817 respectively cooperating with the first swing arm and the second swing arm are provided on the side wall away from the second groove 820.
  • the first limiting hole 35 is set on the side wall of the first groove 810 away from the second groove 820 and is located in the first swing groove. 816 is away from the side of the second swing groove 817 .
  • This embodiment makes full use of the structure of the fixing seat 80 to set the first limiting hole 35, not only does not need to change the structure of the existing fixing seat 80, but also can ensure the electrical clearance and creepage between the first straight line 1 and other parts. Safety requirements for electrical distances.
  • the second straight line 2 has a Z-shaped structure, and the second straight line 2 includes a first connecting portion 211 and a second connecting portion 212 connected by bending at one end, the second contacting portion 21 and the second connecting portion
  • the two lead parts 22 are respectively arranged at the ends of the first connecting part 211 and the second connecting part 212 away from each other. 212 vertical settings.
  • the second auxiliary terminal 65 includes a connection piece 23 and a terminal screw 250.
  • the connection screw 250 can fix the second direct connection line 2 and the connection piece 23, which can facilitate the customer to install the second direct connection line. 2 Make the wiring.
  • the connecting groove 24 for accommodating the second auxiliary terminal 65 on the housing the connecting piece 23 has a 7-shaped structure, and the connecting piece 23 includes a connected first connecting portion 231 and a second connecting portion 232,
  • the second connection part 232 is connected with the housing, and the first connection part 231 and the second connection part 232 are respectively provided with a first threaded hole 25 and a second threaded hole 26, and the second threaded hole 26 is connected with a fixing screw 260 (Fig. 4 ) is fixed on the housing, and the first threaded hole 25 cooperates with the terminal screw 250 ( FIG. 4 ) to fix the wire.
  • the second wiring part 232 may not be connected to the housing through the fixing screw 260, but an insertion slot is provided in the connecting groove 24 on the housing.
  • the two connection parts 232 are inserted into the socket slots for tight fit or interference fit to limit the position, all of which belong to the protection scope of the present invention.
  • it also includes a wire crimping piece 27 matched with the terminal screw 250 , and the second contact portion 21 of the second straight line 2 is inserted between the connecting piece and the wire crimping piece 27 .
  • the connecting sheet 23 is provided with a striped surface for increasing frictional force, effectively improving mechanical properties and reducing temperature rise.
  • the connecting piece 23 is arranged at the same height as the second connecting portion 212, so that the second contact portion and the second connecting portion 212 can be arranged on the same straight line, reducing the volume of the second straight connecting line 2 and reducing the difficulty of wiring .
  • a baffle 500 is provided inside the housing, an upper cavity and a lower cavity are respectively formed on both sides of the baffle 500, and an operating mechanism 8 and a heating element are respectively arranged in the upper cavity and the lower cavity.
  • Protection system 7 the first connection part 211 of the second straight line 2 is arranged in the lower cavity, one end of the second connection part 212 of the second straight line 2 is set in the upper cavity, and the second connection part 212 The other end extends into the lower cavity to connect with the first connecting part 211 .
  • the heating protection system 7 is arranged at one end of the lower cavity, and is separated from the other end of the lower cavity to form a side cavity 70, and the side cavity 70 is provided with a second straight line for limiting 2 limit structure.
  • the second direct connection 2 can be fixed conveniently, and the electrical clearance and creepage between the second direct connection 2 and other parts can be further improved. Safety requirements for electrical distances.
  • the limit structure includes a connected limit horizontal plate 73 and a limit vertical plate 74, and the limit horizontal plate 73 and the limit vertical plate 74 are respectively connected with the side wall of the housing and the baffle 500.
  • a second limiting hole 75 is formed between the limit horizontal plate 73, the limit vertical plate 74, the side wall of the housing and the baffle plate 500, through which the first connecting portion 211 of the second straight line 2 passes.
  • the second limiting hole 75 is limitedly matched with the second limiting hole 75 . It can be understood that the limiting structure may not be connected with the side wall of the housing and the baffle 500, and the limiting structure may also be a structure independently processed on the housing, all of which belong to the protection scope of the present invention.
  • the heat protection system 7 is provided with three sets of bimetallic strips corresponding to the three phases, and two sets of guide plates 71 respectively matched with the three sets of bimetallic strips.
  • the metal sheet bends to both sides to push different guide plates 71 respectively during overload and phase failure, and then moves and drives the operating mechanism 8 through the differential lever 72, and the operating mechanism 8 realizes breaking or maintaining the normally closed contact of the thermal overload relay 5,
  • the heating protection system 7 triggers the operating mechanism 8, and the operating mechanism 8 acts to break the normally closed contact of the control circuit of the thermal overload relay 5, so that the coil of the contactor 6 is de-energized and released, so that the main circuit of the contactor 6 and the thermal The main circuit of the overload relay 5 is disconnected, so as to achieve the effect of protecting the motor.
  • the baffle plate 500 is provided with at least one pair of spaced ribs, and a limiting groove is provided between the pair of ribs, and the limiting groove is used to limit the second of the second straight line 2.
  • the connection part 212 Through the setting of the isolation rib, not only can the second direct connection line 2 be limited, but also the sealing between the upper cavity and the lower cavity can be improved, preventing the heat of the heating protection system 7 from spreading into the operating mechanism 8, ensuring double The metal sheet can react according to the temperature, effectively improving the stability of the product action.
  • the housing includes a base 51 and a side cover 52 installed on the side of the base 51 close to the contactor 6, and the baffle 500 includes a first partition 550 respectively arranged on the base 51 and the side cover 52 and the second partition 560, the partition includes the first partition 55 and the second partition 56 respectively arranged on the base 51 and the side cover 52, the first partition 550 and the second partition 560 on the base 51 and the side cover 52 are installed to form the partition, and the first isolation rib 55 and the second isolation rib 56 are assembled to form the isolation rib after the base 51 and the side cover 52 are installed.
  • the housing corresponds to between the direct connection wires, between the main circuit wires of the contact system, and between the direct connection wires and the main circuit wires
  • Partition plates 54 are respectively provided.
  • the side cover 52 is provided with escape holes corresponding to the first straight line 1, the second straight line 2, the first main circuit wire 31, the second main circuit wire 32 and the third main circuit wire 33 respectively.
  • Partition plates 54 are respectively provided between the avoidance holes 53, and the spacer plates 54 can effectively increase the electrical gap and creepage distance between adjacent wires.
  • the partitions and isolation ribs can also increase the electrical clearance and creepage distance between adjacent wires.
  • the first direct connection line 1, the second direct connection line 2, the first main circuit conductor 31, and the second main circuit conductor 32 and the third main circuit wire 33 respectively include an insulating layer 50
  • the insulating layer 50 can be used for the first direct connection 1, the second direct connection 2, the first main circuit wire 31, the second main circuit wire 32 and the third main circuit
  • the conductors 33 are insulated to prevent the reduction of the insulation after adding the first straight line 1 and the second straight line 2 .
  • the insulation layer 50 may not be wrapped, but the first insulation method composed of the partition plate 54, the baffle plate 500 and the isolation rib is used for insulation, which can also meet the safety requirements of the insulation.
  • the wiring process of this embodiment is as follows, the external wiring first directly connects the first lead part 12 of the first straight line 1 to the A1 terminal or A2 terminal of the contactor 6, and the first contact of the other end of the first straight line 1 Part 11 is connected to the normally closed contact of the control circuit of thermal overload relay 5 .
  • the second lead part 22 at one end of the second direct connection line 2 is connected to the 13NO terminal or the 14NO terminal of the contactor 6, and the second contact part 21 at the other end of the second direct connection line 2 is connected to the connecting piece of the second auxiliary terminal 65 23.
  • the connecting piece 23 cooperates with the screw to form the second auxiliary terminal 65 in the figure.
  • Three sets of main circuit wires are respectively connected in series with the 2/T1 terminal, 4/T2 terminal and 6/T3 terminal of the main circuit of the contactor 6, and then according to the needs of the control circuit, directly connect the 96 terminal of the thermal overload relay 5 and the second auxiliary Terminal 65 can be connected, and the connection with the contactor 6 can be realized directly from the thermal overload relay 5 without wiring from the contactor 6, thus realizing the convenient wiring function;
  • the internal wiring can connect the first straight line 1, the second Two direct connecting lines 2 and three groups and the main circuit lead are coated with insulating layer 50 respectively, if the insulating layer 50 is not used, then skip; It is fixed in the limit hole 35 to achieve the effect of avoiding separation during installation, and at the same time, the guide structure on the side cover 52 can achieve the function of quick installation.
  • a support member 4 is installed between the side cover 52 and the operating mechanism 8, and the support member 4 is connected to the fixing base 80.
  • the routing structure of the main circuit wire In the thermal overload relay of the present utility model, by setting an independent support member 4 between the side cover 52 and the operating mechanism 8, the wiring structure on the support member 4 can realize the free installation of the main circuit wire, and can also make the main circuit
  • the wires can be aligned with the avoidance holes 53 on the casing, which reduces the difficulty of assembling the casing, and can also reduce the electrical gap and creepage distance between the main circuit wires and improve the reliability of the thermal overload relay 5 .
  • the support member 4 has a U-shaped structure, and the support member 4 includes two connecting plates 43 oppositely arranged, and a supporting plate 44 connected between one ends of the two connecting plates 43.
  • One end of the plate 43 away from the support plate 44 is respectively connected to the fixing seat 80, and an escape groove for avoiding the operating mechanism 8 is formed between the two connecting plates 43 and the support plate 44, and the wiring structure is arranged on the support plate 44 On the side close to the side cover 52 .
  • the inner side of one of the two connecting plates 43 is provided with a positioning groove 45 limitedly matched with the fixing seat 80, and the other connecting plate 43 is provided with a positioning column 46, and the positioning column 46 is inserted into The upper limit of the fixed seat is matched. It can be understood that the two connecting plates 43 can also be limitedly matched with the fixing seat 80 in other ways, which all belong to the protection scope of the present invention.
  • the support member 4 of the present embodiment is provided with four sets of wiring structures described above, and the four sets of wiring structures are respectively used to limit the first main circuit conductor 31, the second main circuit conductor 32, the third main circuit conductor 33 and The second straight line 2. It can be understood that the second direct connection line 2 and the corresponding wiring structure may not be provided, or even if the second direct connection line 2 is provided, the corresponding wiring structure is not provided on the support member 4, and the support member 4 It can be used to limit the existing first main circuit wire 31, the second main circuit wire 32, and the third main circuit wire 33, all of which belong to the protection scope of the present utility model.
  • the wiring structure includes two limiting ribs 41 oppositely arranged, and the corresponding main circuit wire or the second straight line 2 is limited inside the corresponding two limiting ribs 41 . Further, the inner sides of the two limit ribs 41 of the wiring structure are respectively provided with two sets of limit protrusions 42, and the two sets of limit protrusions 42 can more reliably limit the main circuit wire or the second direct connection line 2 at on support piece 4.

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Abstract

一种热过载继电器，包括壳体以及分别设置在壳体内的主电路、发热保护系统、操作机构和控制电路，所述壳体内设有第一直连线，所述主电路的进线端设有伸出壳体外的进线端引线部，所述第一直连线包括与控制电路连接的第一接触部，以及伸出壳体的第一引线部，第一直连线的一端与所述控制电路连接，所述第一引线部与主回路的进线端引线部设置在壳体的同一侧用于连接接触器的线圈，过载时发热保护系统触发操作机构，操作机构动作驱动控制电路断开第一直连线的供电，通过在壳体内设置与控制电路连接的第一直连线，使控制电路通过第一直连线直接与接触器的线圈连接，能够减少接线步骤，不需要为控制线路再额外接线，具有接线方便的特点。

Description

热过载继电器 技术领域
本实用新型涉及低压电器领域，特别是涉及一种热过载继电器。
背景技术
一般热过载继电器的常闭触点分别与接触器的线圈端A1和线圈端A2连接，接触器的14NO/22NC常开接线端口与热过载继电器的常闭触点串联，以实现接触器的自保持功能。当然，接触器的14NO/22NC接线端口在一些特殊情况下不与热过载继电器常闭触点串联，也可以做其他功能使用。
但是，现有小型热过载继电器不仅无法直接与接触器连接，小型热过载继电器需要与小型接触器插入配合使用，这样会导致小型热过载继电器会将接触器的线圈端A2和14NO/22NC接线端口遮挡，造成接线困难，降低使用体验。而且现有小型热过载继电器内部导线走线复杂，导线之间的电气距离和爬电间隙无法满足要求。
实用新型内容
本实用新型的目的在于克服现有技术的缺陷，提供一种接线方便，能够直接连接接触器的热过载继电器。
为实现上述目的，本实用新型采用了如下技术方案：
一种热过载继电器，包括壳体以及分别设置在壳体内的主电路、发热保护系统、操作机构和控制电路，所述壳体内设有第一直连线，所述主电路的进线端设有伸出壳体外的进线端引线部，所述第一直连线包括与控制电路连接的第一接触部，以及伸出壳体的第一引线部，第一直连线的一端与所述控制电路连接，所述第一引线部与主回路的进线端引线部设置在壳体的同一侧用于连接接触器的线圈，过载时发热保护系统触发操作机构，操作机构动作驱动控制电路断开第一直连线的供电。
优选的，所述壳体内设有第二辅助端子和第二直连线，所述第二直连线的一端与所述第二辅助端子连接，第二直连线的另一端伸出壳体用于连接接触器的第三辅助端子。
优选的，所述第二直连线包括与热过载继电器的第二辅助端子连接的第二接触部，以及伸出壳体的第二引线部，所述第一引线部、第二引线部与主回路的进线端引线部设置在壳体的同一侧；所述主电路的出线端设有出线端接线端子，出线端接线端子与进线端引线部分别位于壳体的两侧，第二辅助端子与出线端接线端子均设置在壳体的另一侧。
优选的，所述第一直连线和/或第二直连线的外侧分别包裹绝缘层。
优选的，所述热过载继电器设有与所述控制电路连接的第一辅助端子，所述第一直连线与第一辅助端子连接；所述壳体内设与用于安装操作机构的固定座，所述第一辅助端子和操作机构分别设置在固定座的两侧，固定座上设有第 一限位孔，所述第一直连线设有穿过所述第一限位孔的限位部，且限位部与第一限位孔限位配合。
优选的，所述第一直连线设有至少两个分别折弯形成的第一折弯段和第二折弯段，第一折弯段和第二折弯段之间间隔形成平直段，在第一折弯段和第二折弯段之外分别形成第一折叠段和第二折叠段，所述第二折叠段重叠在平直段底侧形成与第一限位孔配合的限位部，所述第一折叠段从外侧跨过固定座与第一辅助端子连接
优选的，所述固定座上分别设有复位按钮和停止按钮，在固定座上设有分别用于容纳复位按钮和停止按钮和第一凹槽和第二凹槽，所述第一限位孔设置在第一凹槽远离第二凹槽的一侧。
优选的，所述复位按钮包括枢转部，以及分别设置在枢转部两端的操作部和摆动部，所述摆动部包括分别沿径向凸起的第一摆动臂和第二摆动臂，在第一摆动臂和第二摆动臂之间形成摆动凹槽，所述第一凹槽在远离第二凹槽的侧壁上设有分别与所述第一摆动臂和第二摆动臂配合的第一摆动槽和第二摆动槽，在第一摆动臂和第二摆动臂之间设有与所述摆动凹槽配合的摆动凸起，所述第一限位孔设置在第一凹槽在远离第二凹槽的侧壁上，且位于第一摆动槽远离第二摆动槽的一侧。
优选的，所述第一直连线的第一接触部与控制电路的常闭触点连接，所述发热保护系统包括多组双金属片，以及分别与多组双金属片配合的两组导板，两组导板分别与差动杆配合，双金属片在过载和断相时分别向两侧弯曲推动不同的导板，通过差动杆移动驱动操作机构，由操作机构实现常闭触点的分断或者保持。
优选的，所述第二直连线包括一端弯折相连的第一连接部和第二连接部，在第一连接部和第二连接部相互远离的一端分别设有第二接触部和第二引线部；所述壳体内设有挡板，在挡板两侧分别形成上腔体和下腔体，在上腔体和下腔体内分别设有所述操作机构和发热保护系统，所述第二直连线的第一连接部设置在下腔体内，所述第二直连线的第二连接部的一端设置在上腔体内，第二连接部的另一端伸到下腔体内与第一连接部连接；所述发热保护系统设置在所述下腔体的一端，并与下腔体的另一端间隔形成侧腔体，所述侧腔体内设有用于限位第二直连线的限位结构。
优选的，所述限位结构包括相连的限位横板和限位竖板，限位横板和限位竖板分别与壳体的侧壁和所述挡板连接，在限位横板、限位竖板、壳体的侧壁和所述挡板之间围成第二限位孔，所述第二直连线的第一连接部穿过第二限位孔并与第二限位孔限位配合；所述挡板上设有至少一对间隔设置的隔离筋，且在一对隔离筋之间设有限位槽，所述限位槽用于限位第二直连线的第二连接部。
优选的，所述壳体内设与用于安装操作机构的固定座，所述壳体包括基座以及安装在基座一侧的侧盖，侧盖上设有避让孔，避让孔用于避让热过载继电器的主电路导线，所述侧盖与操作机构之间安装有支持件，支持件与所述固定座连接，在支持件靠近侧盖的侧面设有用于限位所述主电路导线的走线结构；所述支持件上设有用于限位第二直连线的走线结构。
优选的，所述走线结构包括相对设置的两个限位筋。
优选的，所述支持件包括相对设置的两个连接板，以及连接在两个连接板一端之间的支持板，两个连接板远离支持板的一端分别与所述固定座连接，在两个连接板与支持板之间形成用于避让操作机构的避让槽，所述走线结构设置在支持板靠近侧盖的侧面上。
一种热过载继电器和接触器的连接结构，其包括接触器和所述的热过载继电器，热过载继电器的进线端引线部、第一引线部插入接触器的接线端子内连接配合，第一引线部通过接触器的接线端子与接触器的线圈连接。
本实用新型的热过载继电器，通过在壳体内设置与控制电路连接的第一直连线，使控制电路通过第一直连线直接与接触器的线圈连接，能够减少接线步骤，不需要为控制线路再额外接线，具有接线方便的特点。
附图说明
图1-3是本实用新型热过载继电器与接触器的配合示意图；
图4是本实用新型热过载继电器的结构示意图；
图5是本实用新型热过载继电器的另一结构示意图；
图6是本实用新型固定座的结构示意图；
图7是本实用新型第一直连线的结构示意图；
图8是本实用新型第二直连线的结构示意图；
图9是本实用新型连接片的结构示意图；
图10是本实用新型壳体的结构示意图；
图11是本实用新型第一主电路导线的结构示意图；
图12是本实用新型壳体的分解图；
图13是本实用新型侧盖的结构示意图；
图14是本实用新型基座的结构示意图；
图15是本实用新型自保持电路的原理图；
图16是本实用新型支持件的结构示意图。
具体实施方式
以下结合附图1至16给出的实施例，进一步说明本实用新型的热过载继电器5的具体实施方式。本实用新型的热过载继电器5不限于以下实施例的描述。
如图1-4所示，本实用新型的热过载继电器5包括壳体以及分别设置在壳体内的主电路、发热保护系统7、操作机构8和控制电路，热过载继电器5的主电路用于与接触器6的主电路连接，所述壳体内设有第一直连线1，第一直连线1的一端与所述控制电路连接，第一直连线1的另一端伸出壳体用于连接接触器6的线圈，过载时发热保护系统7触发操作机构8，操作机构8动作驱动控制电路断开第一直连线1的供电，使接触器6的线圈释放，进而使接触器6的主电路和热过载继电器5的主电路断开。
本实用新型的热过载继电器，通过在壳体内设置与控制电路连接的第一直连线1，使控制电路通过第一直连线1直接与接触器6的线圈连接，能够减少接 线步骤，不需要为控制线路再额外接线，具有接线方便的特点。
如图4-5所示，所述壳体内设有第二辅助端子65和第二直连线2，所述第二直连线2的一端与所述第二辅助端子65连接，第二直连线2的另一端伸出壳体用于连接接触器6的第三辅助端子66，所述第二辅助端子65用于连接自保持电路(图中未示出)，自保持电路能够通过第二直连线2锁定。
具体的，所述第一直连线1包括与热过载继电器5的控制电路连接的第一接触部11，以及伸出壳体的第一引线部12，所述第二直连线2包括与热过载继电器5的第二辅助端子65连接的第二接触部21，以及伸出壳体的第二引线部22，所述主回路的进线端设有伸出壳体外的进线端引线部，所述第一引线部12和第二引线部22与主回路的进线端引线部设置在壳体的同一侧，热过载继电器的进线端引线部、第一引线部12和第二引线部22插入接触器的接线端子内连接配合。所述第二引线部22与接触器的第三辅助端子66连接，第三辅助端子66与接触器6的常开或常闭辅助触头连接，在热过载继电器5的一侧就可以完成与接触器6的接线，接线非常方便。所述第一引线部12与接触器的A1端子或A2端子连接，并通过A1端子或A2端子连接与接触器6的线圈连接。
本实施例的第一直连线1的第一接触部11与热过载继电器5的第一辅助端子64连接，第一辅助端子64与热过载继电器5的控制电路的常闭触点连接，第一直连线1的第一引线部12与接触器的A1端子或A2端子连接，并通过A1端子或A2端子连接与接触器6的线圈连接，进而实现了接触器6的线圈与热过载继电器5的常闭触点的直接连接；控制电路的常闭触点用于控制接触器6的线圈的得电和失电，控制电路的常闭触点分断时，接触器6的线圈失电释放，使接触器6的主电路和热过载继电器5的主电路断开。
本实施例的第二直连线2的第二接触部21与热过载继电器5的第二辅助端子65连接，第二辅助端子65为14NO/22NC端子，第二辅助端子65与用于连接自保持电路，第二直连线2的第二引线部22与接触器6的第三辅助端子66连接，第三辅助端子66为13NO端子或14NO端子，第三辅助端子66与接触器6的常开或常闭辅助触头连接，进而实现热过载继电器5的第二辅助端子65与接触器6的常闭或常开辅助接线端子连接，使得热过载继电器5与接触器插接电连接后，直接从热过载继电器5这端实现与接触器6的接线，无需从接触器6那端接线，而且接线更便捷还能够保证与热过载继电器5原有导电线不干涉，并且具备足够安全的爬电距离和电气间隙。
具体的，所述接触器6包括与接触器6的主电路分别连接的主电路接线端子、与接触器6的线圈分别连接的A1端子和A2端子，与接触器的常闭或常开辅助接线端子连接的13NO端子或14NO端子，热过载继电器5的进线端引线部与接触器的主电路接线端子连接，本实施例为三相热过载继电器5，包括三组主电路，三组主电路对应三组主电路导线，三组主电路导线分别为第一主电路导线31、第二主电路导线32和第三主电路导线33，三组主电路的进线端引线部分别为第一进线端91、第二进线端92和第三进线端93，第一进线端91、第二进线端92和第三进线端93分别用于连接接触器6的三个主电路的接线端子，即图中6/T3端子61、4/T2端子62和2/T1端子63，所述第一引线部12与接触器的A2接线端子连接，所述第二引线部22与接触器的14NO/22NC接线端子连 接，所述第一引线部12、第二引线部22、第一进线端91、第二进线端92和第三进线端93设置在壳体的同一侧。
如图15所示，当按下启动按钮SB2(点动)的瞬间，线路连通，接触器6的线圈KM2通电，接触器6的常开触点KM1由常开变为常闭，从而将接触器6锁定在吸合状态，自保持电路为现有技术，本实施例不做具体限定。
进一步，所述热过载继电器5的主回路的出线端设有出线端接线端子，出线端接线端子与进线端引线部分别位于壳体的两侧，第二辅助端子65与出线端接线端子均设置在壳体的另一侧。图中热过载继电器5的出线端接线端子分别为2/T1端子、4/T2端子、6/T3端子，第二辅助端子65与出线端接线端子并排设置。如图6-7所示，所述固定座80上设有第一限位孔35，第一直连线1的第一接触部11和第一引线部12分别位于固定座80的两侧，所述第一直连线1的中部设有穿过所述第一限位孔35的限位部13，且限位部13与第一限位孔35限位配合。通过限位部13与第一限位孔35配合实现免脱离安装，不仅安装方便，而且仅靠零件本身结构特征可实现。
具体的，所述第一辅助端子64和操作机构8分别设置在固定座80的两侧，所述第一直连线1的中部设有至少两个分别折弯形成的第一折弯段141和第二折弯段142，在第一折弯段141和第二折弯段142之间间隔形成平直段15，在第一折弯段141和第二折弯段142之外分别形成第一折叠段151和第二折叠段152，所述第二折叠段152重叠在平直段15底侧形成限位部13，所述第一折叠段151从外侧跨过固定座80，并通过第一接触部11与第一辅助端子64连接。可以理解的是，限位部13的形状也可以调节，也可以折弯更多次。此外，限位部13也可以为直线结构，直接穿过所述第一限位孔35，都属于本实用新型的保护范围。
如图6所示，所述固定座80上分别设有复位按钮81和停止按钮82，复位按钮81用于产品热过载脱扣保护后复位之用，停止按钮82用于产品紧急断开作用，在固定座80上设有分别用于容纳复位按钮81和停止按钮82和第一凹槽810和第二凹槽820，所述第一限位孔35设置在第一凹槽810远离第二凹槽820的一侧。
具体的，所述复位按钮81包括枢转部811，以及分别设置在枢转部811两端的操作部812和摆动部813，操作部812伸出第一凹槽810用于操作，所述摆动部813包括分别沿径向凸起的第一摆动臂和第二摆动臂，在第一摆动臂和第二摆动臂之间形成摆动凹槽(图中未示出)，所述第一凹槽810在远离第二凹槽820的侧壁上设有分别与所述第一摆动臂和第二摆动臂配合的第一摆动槽816和第二摆动槽817，在第一摆动臂和第二摆动臂之间设有与所述摆动凹槽配合的摆动凸起818，所述第一限位孔35设置在第一凹槽810在远离第二凹槽820的侧壁上，且位于第一摆动槽816远离第二摆动槽817的一侧。本实施例充分利用固定座80的结构设置第一限位孔35，不仅不需要改变现有固定座80的结构，而且还能够保证第一直连线1与其它零件之间的电气间隙和爬电距离的安全要求。
如图8所示，所述第二直连线2呈Z型结构，第二直连线2包括一端弯折相连的第一连接部211和第二连接部212，第二接触部21和第二引线部22分别 设置在第一连接部211和第二连接部212相互远离的一端，第二接触部21与第一连接部211设置在同一直线上，第二引线部22与第二连接部212垂直设置。
如图8-10所示，所述第二辅助端子65包括连接片23和接线螺钉250，接线螺钉250能够将第二直连线2与连接片23固定，能够方便客户对第二直连线2进行接线。具体的，所述壳体上用于容纳第二辅助端子65的连接槽24，所述连接片23呈7字型结构，连接片23包括相连的第一接线部231和第二接线部232，第二接线部232与壳体连接，在第一接线部231和第二接线部232上分别设有第一螺纹孔25和第二螺纹孔26，第二螺纹孔26与固定螺钉260(图4)配合固定在壳体上，第一螺纹孔25与接线螺钉250(图4)配合用于固定导线。
作为连接片23与壳体的另一种连接方式，第二接线部232也可以不通过固定螺钉260与壳体连接，而是在所述壳体上的连接槽24内设置插接槽，第二接线部232插到插接槽内紧配合或过盈配合的方式限位，都属于本实用新型的保护范围。
进一步，所述还包括与所述接线螺钉250配合的压线片27，所述第二直连线2的第二接触部21插到连接片与压线片27之间。
优选的，所述连接片23上设有用于增大摩擦力的条纹面，有效提高机械性能，并降低温升。
进一步，连接片23设置在与第二连接部212相同的高度，能够使第二接触部和第二连接部212设置在同一直线上，减少第二直连线2的体积，并降低布线的难度。
如图5、14所示，所述壳体内设有挡板500，在挡板500两侧分别形成上腔体和下腔体，在上腔体和下腔体内分别设有操作机构8和发热保护系统7，所述第二直连线2的第一连接部211设置在下腔体内，所述第二直连线2的第二连接部212的一端设置在上腔体内，第二连接部212的另一端伸到下腔体内与第一连接部211连接。本实施例通过对第二直连线2的形状优化，并利用壳体内上腔体和下腔体的结构分别进行走线，能够保证第二直连线2与其它零件之间的电气间隙和爬电距离的安全要求。
进一步，所述发热保护系统7设置在所述下腔体的一端，并与下腔体的另一端间隔形成侧腔体70，所述侧腔体70内设有用于限位第二直连线2的限位结构。
通过在下腔体内设置用于限位第二直连线2的限位结构，能够方便固定第二直连2的，而且能够进一步提高第二直连线2与其它零件之间的电气间隙和爬电距离的安全要求。
具体的，所述限位结构包括相连的限位横板73和限位竖板74，限位横板73和限位竖板74分别与壳体的侧壁和所述挡板500连接，在限位横板73、限位竖板74、壳体的侧壁和所述挡板500之间围成第二限位孔75，所述第二直连线2的第一连接部211穿过第二限位孔75并与第二限位孔75限位配合。可以理解的是，所述限位结构也可以不与壳体的侧壁和所述挡板500，限位结构也可以是独立加工在壳体上的结构，都属于本实用新型的保护范围。
如图5所示，所述发热保护系统7对应三相设有三组双金属片，以及分别与三组双金属片配合的两组导板71，两组导板71分别与差动杆72配合，双金 属片在过载和断相时分别向两侧弯曲推动不同的导板71，再通过差动杆72移动驱动操作机构8，由操作机构8实现热过载继电器5的常闭触点的分断或者保持，过载时发热保护系统7触发操作机构8，操作机构8动作使热过载继电器5的控制电路的常闭触点的分断，使得接触器6的线圈失电释放，使接触器6的主电路和热过载继电器5的主电路断开，以此达到保护电机的作用。
进一步，所述挡板500上设有至少一对间隔设置的隔离筋，且在一对隔离筋之间设有限位槽，所述限位槽用于限位第二直连线2的第二连接部212。通过隔离筋的设置，不仅可以限位第二直连线2，而且还可以提高上腔体与下腔体之间的密封性，防止发热保护系统7的热量扩散到操作机构8中，保证双金属片能够根据温度做出反应，有效提高产品动作的稳定性。
具体的，所述壳体包括基座51以及安装在基座51靠近接触器6的一侧的侧盖52，挡板500包括分别设置在基座51和侧盖52上的第一隔板550和第二隔板560，所述隔离筋包括分别设置在基座51和侧盖52上的第一隔离筋55和第二隔离筋56，第一隔板550和第二隔板560在基座51与侧盖52安装后组成所述隔板，第一隔离筋55和第二隔离筋56在基座51与侧盖52安装后组成所述隔离筋。
如图12-14所示，为本实用新型的第一种绝缘方式，所述壳体对应在直连线之间、接触系统的主电路导线之间、以及直连线与主电路导线之间分别设有隔板54。具体的，所述侧盖52设有分别与第一直连线1、第二直连线2、第一主电路导线31、第二主电路导线32和第三主电路导线33对应的避让孔53，避让孔53之间分别设有隔板54，隔板54能够有效增加相邻导线之间的电器间隙及爬电距离。此外，所述隔板和隔离筋也能够增加相邻导线之间的电器间隙及爬电距离。
如图7、8、11所示，为本实用新型的第二种绝缘方式，所述第一直连线1、第二直连线2、第一主电路导线31、第二主电路导线32和第三主电路导线33分别包括绝缘层50，绝缘层50能够在第一直连线1、第二直连线2、第一主电路导线31、第二主电路导线32和第三主电路导线33之间绝缘，防止增加第一直连线1和第二直连线2后降低绝缘性。可以理解的是，也可以不包裹绝缘层50，而是采用上述由隔板54、挡板500和隔离筋组成的第一种绝缘方式进行绝缘，同样可以满足绝缘的安全要求。
本实施例的接线过程如下，外部接线先将第一直连线1的第一引线部12与接触器6的A1端子或A2端子直连，第一直连线1的另外一端的第一接触部11与热过载继电器5的控制线路的常闭触点连接。所述第二直连线2一端的第二引线部22与接触器6的13NO端子或14NO端子连接，第二直连线2另外一端的第二接触部21连接第二辅助端子65的连接片23，连接片23与螺钉配合形成图中的第二辅助端子65。三组根主电路导线分别与接触器6的主电路的2/T1端子、4/T2端子和6/T3端子串联，再根据控制线路需要，直接在热过载继电器5的96端子和第二辅助端子65接线即可，直接从热过载继电器5这端实现与接触器6的接线，无需从接触器6那端接线，从而实现了便捷接线功能；内部接线可以将第一直连线1、第二直连线2和三组与主电路导线上分别包覆绝缘层50，如果不使用绝缘层50则跳过；再将第一直连线1上限位部13插到固定座80的第 一限位孔35中固定，达到安装免脱离的作用，同时侧盖52上的导向结构能够达到快速安装功能。
如图4、16所示，所述侧盖52与操作机构8之间安装有支持件4，支持件4与所述固定座80连接，在支持件4靠近侧盖52的侧面设有用于限位所述主电路导线的走线结构。本实用新型的热过载继电器，通过在侧盖52与操作机构8之间设置独立的支持件4，通过支持件4上的走线结构能够实现主电路导线的免脱离安装，还能够使主电路导线能够对准壳体上的避让孔53，降低装配壳体的难度，而且还能够减少主电路导线之间的电气间隙和爬电距离，提高热过载继电器5可靠性。
如图16所示，所述支持件4呈U型结构，所述支持件4包括相对设置的两个连接板43，以及连接在两个连接板43一端之间的支持板44，两个连接板43远离支持板44的一端分别与所述固定座80连接，在两个连接板43与支持板44之间形成用于避让操作机构8的避让槽，所述走线结构设置在支持板44靠近侧盖52的侧面上。
进一步，所述两个连接板43中的一个连接板43内侧设有与固定座80限位配合的定位槽45，另一个连接板43上设有定位柱46，所述定位柱46插接到固定座上限位配合。可以理解的是，两个连接板43也可通过其它方式与固定座80限位配合，都属于本实用新型的保护范围。
本实施例的支持件4上设有四组所述的走线结构，四组走线结构分别用于限位第一主电路导线31、第二主电路导线32、第三主电路导线33和第二直连线2。可以理解的是，也可以不设置所述的第二直连线2以及对应的走线结构，或者即使设置第二直连线2，但支持件4上不设置对应的走线结构，支持件4可用于限位现有的第一主电路导线31、第二主电路导线32、第三主电路导线33，都属于本实用新型的保护范围。
如图16所示，所述走线结构包括相对设置的两个限位筋41，对应的主电路导线或第二直连线2限位在对应两个限位筋41的内侧。进一步，所述走线结构的两个限位筋41的内侧分别设有两组限位凸包42，两组限位凸包42将主电路导线或第二直连线2更可靠限位在支持件4上。
以上内容是结合具体的优选实施方式对本实用新型所作的进一步详细说明，不能认定本实用新型的具体实施只局限于这些说明。对于本实用新型所属技术领域的普通技术人员来说，在不脱离本实用新型构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本实用新型的保护范围。

Claims (15)

  1. 一种热过载继电器，包括壳体以及分别设置在壳体内的主电路、发热保护系统(7)、操作机构(8)和控制电路，其特征在于：所述壳体内设有第一直连线(1)，所述主电路的进线端设有伸出壳体外的进线端引线部，所述第一直连线(1)包括与控制电路连接的第一接触部(11)，以及伸出壳体的第一引线部(12)，第一直连线(1)的一端与所述控制电路连接，所述第一引线部(12)与主回路的进线端引线部设置在壳体的同一侧用于连接接触器(6)的线圈，过载时发热保护系统(7)触发操作机构(8)，操作机构(8)动作驱动控制电路断开第一直连线(1)的供电。
  2. 根据权利要求1所述的热过载继电器，其特征在于：所述壳体内设有第二辅助端子(65)和第二直连线(2)，所述第二直连线(2)的一端与所述第二辅助端子(65)连接，第二直连线(2)的另一端伸出壳体用于连接接触器(6)的第三辅助端子(66)。
  3. 根据权利要求2所述的热过载继电器，其特征在于：所述第二直连线(2)包括与热过载继电器(5)的第二辅助端子(65)连接的第二接触部(21)，以及伸出壳体的第二引线部(22)，所述第一引线部(12)、第二引线部(22)与主回路的进线端引线部设置在壳体的同一侧；所述主电路的出线端设有出线端接线端子，出线端接线端子与进线端引线部分别位于壳体的两侧，第二辅助端子(65)与出线端接线端子均设置在壳体的另一侧。
  4. 根据权利要求2所述的热过载继电器，其特征在于：所述第一直连线(1)和/或第二直连线(2)的外侧分别包裹绝缘层(50)。
  5. 根据权利要求3所述的热过载继电器，其特征在于：所述热过载继电器(5)设有与所述控制电路连接的第一辅助端子(64)，所述第一直连线(1)与第一辅助端子(64)连接；所述壳体内设与用于安装操作机构(8)的固定座(80)，所述第一辅助端子(64)和操作机构(8)分别设置在固定座(80)的两侧，固定座(80)上设有第一限位孔(35)，所述第一直连线(1)设有穿过所述第一限位孔(35)的限位部(13)，且限位部(13)与第一限位孔(35)限位配合。
  6. 根据权利要求5所述的热过载继电器，其特征在于：所述第一直连线(1)设有至少两个分别折弯形成的第一折弯段(141)和第二折弯段(142)，第一折弯段(141)和第二折弯段(142)之间间隔形成平直段(15)，在第一折弯段(141)和第二折弯段(142)之外分别形成第一折叠段(151)和第二折叠段(152)，所述第二折叠段(152)重叠在平直段(15)底侧形成与第一限位孔(35)配合的限位部(13)，所述第一折叠段(151)从外侧跨过固定座(80)与第一辅助端子(64)连接
  7. 根据权利要求5所述的热过载继电器，其特征在于：所述固定座(80)上分别设有复位按钮(81)和停止按钮(82)，在固定座(80)上设有分别用于容纳复位按钮(81)和停止按钮(82)和第一凹槽(810)和第二凹槽(820)，所述第一限位孔(35)设置在第一凹槽(810)远离第二凹槽(820)的一侧。
  8. 根据权利要求7所述的热过载继电器，其特征在于：所述复位按钮(81)包括枢转部(811)，以及分别设置在枢转部(811)两端的操作部(812)和摆动部(813)，所述摆动部(813)包括分别沿径向凸起的第一摆动臂和第二摆动 臂，在第一摆动臂和第二摆动臂之间形成摆动凹槽，所述第一凹槽(810)在远离第二凹槽(820)的侧壁上设有分别与所述第一摆动臂和第二摆动臂配合的第一摆动槽(816)和第二摆动槽(817)，在第一摆动臂和第二摆动臂之间设有与所述摆动凹槽配合的摆动凸起(818)，所述第一限位孔(35)设置在第一凹槽(810)在远离第二凹槽(820)的侧壁上，且位于第一摆动槽(816)远离第二摆动槽(817)的一侧。
  9. 根据权利要求1所述的热过载继电器，其特征在于：所述第一直连线(1)的第一接触部(11)与控制电路的常闭触点连接，所述发热保护系统(7)包括多组双金属片，以及分别与多组双金属片配合的两组导板(71)，两组导板(71)分别与差动杆(72)配合，双金属片在过载和断相时分别向两侧弯曲推动不同的导板(71)，通过差动杆(72)移动驱动操作机构(8)，由操作机构(8)实现常闭触点的分断或者保持。
  10. 根据权利要求3所述的热过载继电器，其特征在于：所述第二直连线(2)包括一端弯折相连的第一连接部(211)和第二连接部(212)，在第一连接部(211)和第二连接部(212)相互远离的一端分别设有第二接触部(21)和第二引线部(22)；所述壳体内设有挡板(500)，在挡板(500)两侧分别形成上腔体和下腔体，在上腔体和下腔体内分别设有所述操作机构(8)和发热保护系统(7)，所述第二直连线(2)的第一连接部(211)设置在下腔体内，所述第二直连线(2)的第二连接部(212)的一端设置在上腔体内，第二连接部(212)的另一端伸到下腔体内与第一连接部(211)连接；所述发热保护系统(7)设置在所述下腔体的一端，并与下腔体的另一端间隔形成侧腔体(70)，所述侧腔体(70)内设有用于限位第二直连线(2)的限位结构。
  11. 根据权利要求10所述的热过载继电器，其特征在于：所述限位结构包括相连的限位横板(73)和限位竖板(74)，限位横板(73)和限位竖板(74)分别与壳体的侧壁和所述挡板(500)连接，在限位横板(73)、限位竖板(74)、壳体的侧壁和所述挡板(500)之间围成第二限位孔(75)，所述第二直连线(2)的第一连接部(211)穿过第二限位孔(75)并与第二限位孔(75)限位配合；所述挡板(500)上设有至少一对间隔设置的隔离筋，且在一对隔离筋之间设有限位槽，所述限位槽用于限位第二直连线(2)的第二连接部(212)。
  12. 根据权利要求2所述的热过载继电器，其特征在于：所述壳体内设与用于安装操作机构(8)的固定座(80)，所述壳体包括基座(51)以及安装在基座(51)一侧的侧盖(52)，侧盖(52)上设有避让孔(53)，避让孔(53)用于避让热过载继电器(5)的主电路导线，所述侧盖(52)与操作机构(8)之间安装有支持件(4)，支持件(4)与所述固定座(80)连接，在支持件(4)靠近侧盖(52)的侧面设有用于限位所述主电路导线的走线结构；所述支持件(4)上设有用于限位第二直连线(2)的走线结构。
  13. 根据权利要求12所述的热过载继电器，其特征在于：所述走线结构包括相对设置的两个限位筋(41)。
  14. 根据权利要求12所述的热过载继电器，其特征在于：所述支持件(4)包括相对设置的两个连接板(43)，以及连接在两个连接板(43)一端之间的支持板(44)，两个连接板(43)远离支持板(44)的一端分别与所述固定座(80) 连接，在两个连接板(43)与支持板(44)之间形成用于避让操作机构(8)的避让槽，所述走线结构设置在支持板(44)靠近侧盖(52)的侧面上。
  15. 一种热过载继电器和接触器的连接结构，其特征在于：包括接触器和权利要求1-14任一所述的热过载继电器，热过载继电器的进线端引线部、第一引线部(12)插入接触器的接线端子内连接配合，第一引线部(12)通过接触器的接线端子与接触器(6)的线圈连接。
PCT/CN2022/084652 2021-11-23 2022-03-31 热过载继电器 WO2023092922A1 (zh)

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