Thermomagnetic tripping mechanism

Abstract

A thermomagnetic tripping mechanism comprises a current adjusting unit and a thermomagnetic tripping unit, the current adjusting unit comprises a supporting piece, an instant adjusting assembly and a delay adjusting assembly, the instant adjusting assembly and the delay adjusting assembly are rotationally arranged on the supporting piece, the thermomagnetic tripping unit is arranged on one side of the supporting piece, and the thermomagnetic tripping unit comprises an armature and a bimetal piece. The instantaneous adjusting assembly and the delay adjusting assembly are respectively rotated to correspondingly adjust tripping action strokes of the armature and the bimetallic piece, the delay adjusting assembly comprises a traction rod and a delay adjusting piece, the traction rod and the delay adjusting piece are respectively and rotatably arranged on the supporting piece, and the delay adjusting piece is rotated to drive the traction rod to move in the axial direction. And the armature and the bimetal piece respectively drive the traction rod to rotate around the shaft. The draw bar can be triggered to rotate during instantaneous or delayed protection, and can also be used as a part of the delayed adjusting component to be driven by the delayed adjusting component to move, so that the number of parts is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a thermal magnetic tripping mechanism. Background Art

[0002] Circuit breaker is one of the important electrical components in the low-voltage electrical field. It is used to connect and disconnect current. When overload or short circuit occurs in the circuit, the circuit breaker can cut off the fault current to protect the electrical device. The method of cutting off the fault current of the circuit breaker is achieved through the tripping mechanism. In existing products, the fault current is mainly cut off by the thermal magnetic tripping mechanism.

[0003] At present, the adjustable thermal-magnetic tripping mechanism on the market involves coordination with the traction rod. When the thermal-magnetic tripping mechanism triggers the traction rod to move during instantaneous or delayed protection, the adjustment rod needs to be turned when performing instantaneous or overload adjustment. As a result, the existing thermal-magnetic tripping mechanism needs to take into account the position and coordination relationship with the traction rod and the adjustment rod during the assembly process, which increases the difficulty of assembly. Summary of the invention

[0004] The purpose of the utility model is to overcome at least one defect of the prior art and provide a thermal magnetic tripping mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a thermal magnetic tripping mechanism, comprising a current regulating unit and a thermal magnetic tripping unit, the current regulating unit comprising a support and an instantaneous regulating component and a time delay regulating component which are respectively rotatably arranged on the support, the thermal magnetic tripping unit is arranged on one side of the support, the thermal magnetic tripping unit comprises an armature and a bimetallic member, the instantaneous regulating component and the time delay regulating component are respectively rotated to correspondingly adjust the tripping action stroke of the armature and the bimetallic member, the time delay regulating component comprises a traction rod and a time delay regulating member, the traction rod and the time delay regulating member are respectively rotatably arranged on the support, the time delay regulating member is rotated to drive the traction rod to move axially, and the armature and the bimetallic member respectively drive the traction rod to rotate around the axis.

[0007] Preferably, the delay adjustment assembly further comprises a delay adjustment screw, and the delay adjustment screw is rotatably disposed on the traction rod and is spaced opposite to the bimetallic piece.

[0008] Preferably, the support member is provided with a first matching hole, the opposite ends of the delay adjustment member are respectively a first operating end and a first driving end, the first driving end rotates through the first matching hole and is provided with a protruding eccentric driving arm, the traction rod is provided with a matching groove, and the eccentric driving arm is plugged into the matching groove.

[0009] Preferably, the traction rod includes a traction rod body, a guide shaft and a reset torsion spring, the traction rod body is provided with an axial cavity, the guide shaft is arranged on the support member and slides through the axial cavity, so that the traction rod body rotates around the guide shaft and moves axially along the guide shaft, the outer side wall of the traction rod body is protruding with an instantaneous mating part and a delayed mating part, the instantaneous mating part cooperates with the armature, the delayed mating part is provided with an adjusting screw, and the outer side of the traction rod body is also provided with a mating groove connected with the delay adjusting part, the reset torsion spring is sleeved on the guide shaft, and the two elastic arms of the reset torsion spring are respectively connected with the support member and the traction rod body.

[0010] Preferably, the instantaneous adjustment component includes an instantaneous adjustment member and a linkage member, the support member is provided with a second mating hole, the opposite ends of the instantaneous adjustment member are respectively a second operating end and a second driving end, the second driving end is provided with a spiral adjustment surface, the linkage member is provided with a connecting portion and a supporting portion, an elastic member is connected between the connecting portion and the armature, and the supporting portion slides along the spiral adjustment surface to adjust the traction force of the elastic member on the armature.

[0011] Preferably, the instantaneous adjustment assembly further includes an instantaneous adjustment screw, the thermal-magnetic tripping unit includes a bracket, the armature is rotatably connected to the bracket, and the instantaneous adjustment screw is arranged on the bracket and cooperates with the armature.

[0012] Preferably, the support member is rotatably equipped with a trigger member, a buckle structure for limiting each other is provided between the trigger member and the traction rod, and a reset member is provided between the trigger member and the support member.

[0013] Preferably, the thermal-magnetic trip unit includes a bracket, a temperature sensing element, an armature, a yoke and a bimetallic member, the temperature sensing element and the yoke are respectively fixed on the bracket, the armature is rotatably connected to the bracket, so that the first end of the armature rotates on one side of the bracket to drive the traction rod, the second end of the armature and the yoke are respectively located on opposite sides of the temperature sensing element, so that a magnetic gap is left between the second end of the armature and the yoke, an elastic member is connected between the armature and the instantaneous adjustment component, the second end of the bimetallic member is fixedly connected to the temperature sensing element, and the traction rod is located between the first end of the bimetallic member and the first end of the armature.

[0014] Preferably, the armature is rotatably arranged between the bracket and the bimetallic piece, the second end of the armature is provided with an avoidance groove for avoiding the bimetallic piece, the elastic piece is obliquely arranged in the gap between the bracket and the bimetallic piece, and the two ends of the elastic piece are respectively connected to the second end of the armature and the instantaneous adjustment component.

[0015] Preferably, the guide shaft is made of glass fiber material.

[0016] The thermal-magnetic tripping mechanism of the utility model has a traction rod that can be triggered to rotate during instantaneous or delayed protection, and can also be driven to move by the delay adjusting member as a part of the delay adjusting component. Compared with the existing structure, the thermal-adjusting rod that cooperates with the traction rod and the connecting rod that cooperates with the thermal-adjusting rod are omitted, thereby reducing the number of parts and the cost, facilitating the thermal-magnetic tripping unit and the current adjusting unit to form a modular structure, thereby simplifying the structure and the assembly process.

[0017] In addition, the traction rod body cooperates with the guide shaft to achieve axial movement and rotation around the axis, ensuring the movement stability of the traction rod. In particular, the guide shaft is made of glass fiber material, which not only ensures the strength requirements but also enhances the phase-to-phase insulation.

[0018] In addition, the temperature sensing element cooperates with the bimetallic part to realize delayed protection, and can also cooperate with the yoke and armature to realize instantaneous protection. At the same time, the temperature sensing element provides a fixed assembly position for the thermal magnetic trip unit, which simplifies the structure of the thermal magnetic trip unit and facilitates assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the thermal magnetic tripping mechanism of the utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the thermal magnetic tripping mechanism of the utility model. Figure 2 ;

[0021] Figure 3 It is an exploded schematic diagram of the thermal magnetic tripping mechanism of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the current regulating unit in the utility model. Figure 1 ;

[0023] Figure 5 This is a schematic diagram of the structure of the current regulating unit in the utility model. Figure 2 ;

[0024] Figure 6 This is a schematic diagram of the structure of the current regulating unit in the utility model. Figure 3 ;

[0025] Figure 7 This is a schematic diagram of the structure of the current regulating unit in the utility model. Figure 4 (excluding trigger parts, instantaneous adjustment parts and delay adjustment parts);

[0026] Figure 8 It is a structural schematic diagram of the traction rod in the utility model (excluding the guide shaft);

[0027] Fig. 9 This is a schematic diagram of the structure of the thermal magnetic trip unit in the utility model. Figure 1 ;

[0028] Fig.10 This is a schematic diagram of the structure of the thermal magnetic trip unit in the utility model. Figure 2 ;

[0029] Fig.11 It is an exploded schematic diagram of the thermal magnetic trip unit in the utility model;

[0030] Fig.12 It is a schematic diagram of the coordination of the temperature sensing element, the bimetallic piece, the magnetic yoke and the bracket in the utility model;

[0031] Fig.13 It is a structural schematic diagram of the time delay adjusting member in the utility model;

[0032] Fig.14 It is a structural schematic diagram of the instantaneous adjustment member in the utility model;

[0033] Figure numerals: 1-current regulating unit, 10-supporting member, 101-first operating hole, 102-second operating hole, 103-limiting portion, 104-supporting portion, 105-delay limiting platform, 106-instantaneous limiting platform, 107-spring limiting portion, 11-delay adjusting member, 111-first operating end, 112-first driving end, 113-eccentric driving arm, 114-first limiting portion, 12-traction rod, 121-traction rod body, 1211-axial cavity, 1212-reset groove, 1213-delay matching portion, 1214-instantaneous matching portion, 1215-matching groove, 1216-screw hole, 1217-first buckle portion , 122-guide shaft, 123-reset torsion spring, 131-delay adjustment screw, 132-instantaneous adjustment screw, 14-instantaneous adjustment member, 141-second operating end, 142-second driving end, 143-second limiting portion, 15-linkage member, 151-connecting portion, 152-resting portion, 16-trigger member, 161-second buckle portion, 17-reset member, 2-thermal magnetic tripping unit, 21-bracket, 22-temperature sensing element, 23-armature, 231-first plate, 232-second plate, 233-striking portion, 234-avoidance groove, 24-yoke, 25-bimetallic member, 251-limiting member, 26-elastic member, 27-connecting shaft. DETAILED DESCRIPTION

[0034] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the thermal magnetic tripping mechanism of the utility model. The thermal magnetic tripping mechanism of the utility model is not limited to the description of the following embodiments.

[0035] like Figure 1-2As shown, the thermal-magnetic tripping mechanism includes a thermal-magnetic tripping unit 2, which is connected to the main line of the switch device for realizing instantaneous and delayed protection. The switch device generally includes an operating mechanism and a traction rod 12. When the main line is in a normal state, in the operating mechanism of the existing circuit breaker, the tripping catch in the operating mechanism maintains a snap fit with the lock catch, and the re-catch is limitedly matched with the lock catch, and the re-catch is driven to rotate by the traction rod. When a short circuit or overload fault occurs in the main line, the thermal-magnetic tripping unit 2 triggers the operating mechanism to trip through the traction rod, that is, the traction rod drives the re-catch to rotate, so that the re-catch is released from the limit fit with the lock catch, the tripping catch is released from the snap fit with the lock catch, and the switch device is powered off.

[0036] Specifically, the thermal magnetic trip unit 2 includes a time-delay tripper and an instantaneous tripper. The time-delay tripper includes a temperature-sensing element 22 and a bimetallic member 25, wherein the temperature-sensing element 22 is connected to the main circuit of the switch device, one end of the bimetallic member 25 is connected to the temperature-sensing element 22, and the other end of the bimetallic member 25 cooperates with the traction rod 12. When an overload fault occurs in the main circuit, the bimetallic member 25 is heated to trigger the traction rod 12 to rotate, causing the operating mechanism to trip and thus achieve time-delay protection; the instantaneous tripper includes a yoke 24, an armature 23 and a conductive member. The armature 23 is rotatably arranged with a magnetic gap between it and the yoke 24. The conductive member is connected to the main circuit of the switch device. When the short-circuit current flows through the conductive member, the magnetic field formed by the cooperation between the yoke 24 and the armature 23 drives the armature 23 to move, and the armature 23 drives the traction rod 12 to rotate to trigger the operating mechanism to trip, thereby achieving instantaneous protection.

[0037] Furthermore, the thermal-magnetic tripping mechanism also includes a current regulating unit 1, which includes a support 10, an instantaneous regulating component and a delayed regulating component. The instantaneous regulating component and the delayed regulating component are respectively rotatably arranged on the support 10, and the thermal-magnetic tripping unit 2 is arranged on one side of the support 10. The rotating instantaneous regulating component adjusts the tripping action stroke of the armature 23, that is, adjusts the distance moved by the armature 23 to trigger the traction rod 12 during the instantaneous protection process; the rotating delayed tripping component is used to adjust the tripping action stroke of the bimetallic member 25, that is, adjusts the distance moved by the bimetallic member 25 to trigger the traction rod 12 during the delayed protection process.

[0038] like Figure 3As shown, the improvement of the present application is that the delay adjustment component includes a traction rod 12 and a delay adjustment member 11, and the traction rod 12 and the delay adjustment member 11 are respectively rotatably arranged on the support member 10, and the rotation of the delay adjustment member 11 drives the traction rod 12 to move axially, and the armature 23 and the bimetallic member 25 respectively drive the traction rod 12 to rotate around the axis. In such a structure, the traction rod 12 can be triggered to rotate during instantaneous or delayed protection, and can also be driven to move by the delay adjustment member 11 as a part of the delay adjustment component. Compared with the existing structure, the thermal adjustment rod cooperating with the traction rod and the connecting rod cooperating with the thermal adjustment rod and other components are omitted, thereby reducing the number of parts and reducing the cost, which is conducive to the thermal-magnetic trip unit and the current adjustment unit to form a modular structure, simplifying the structure and assembly process.

[0039] Further, such as Figure 4 As shown, the delay adjustment assembly also includes a delay adjustment screw 131, which is arranged on the traction rod 12 and is spaced opposite to the first end of the bimetallic member 25. The delay adjustment screw 131 is rotated to change the distance between the delay adjustment screw 131 and the first end of the bimetallic member 25, and then the delay adjustment member 11 is rotated to drive the traction rod 12 to move along the axial direction of the traction rod 12, so as to further adjust the tripping action stroke of the bimetallic member 25.

[0040] like Figure 1-4 As shown, the instantaneous adjustment component includes an instantaneous adjustment member 14 and a linkage member 15, which are rotatably arranged on a bracket 21, and the center axis of the instantaneous adjustment member 14 and the linkage member 15 are perpendicular, and an elastic member 26 is connected between the linkage member 15 and the armature 23, and the rotation of the instantaneous adjustment member 14 can drive the linkage member 15 to rotate, and the elastic member 26 is driven to adjust the traction force of the elastic member 26 on the armature 23, thereby adjusting the position of the armature 23. Of course, the instantaneous adjustment component can also adopt the existing technology.

[0041] In addition, if Figure 4 , 5 As shown, the support member 10 is also equipped with a trigger member 16, one end of the trigger member 16 is rotatably connected to the support member 10, and the other end is snap-fitted with the traction rod 12. When the traction rod 12 is driven by the armature 23 or the bimetallic member 25 to rotate around the axis, the snap-fit ​​structure between the trigger member 16 and the traction rod 12 is disintegrated, and the rotation of the trigger member 16 triggers the re-snap rotation of the operating mechanism, so that the snap-fit ​​jump buckle and the snap-fit ​​lock buckle in the operating mechanism are also disintegrated, and the operating mechanism is tripped and powered off.

[0042] The thermal magnetic trip unit 2 includes a time-delay trip device and an instantaneous trip device, wherein the temperature sensing element 22 in the time-delay trip device can be used as a conductive member in the instantaneous trip device, thereby omitting a component, and also facilitating the thermal magnetic trip unit 2 to form a modular structure, simplifying the structure and facilitating assembly. Of course, the thermal magnetic trip unit 2 can adopt an existing structure.

[0043] Combination Figure 1-14 A specific implementation of a thermal magnetic tripping mechanism is provided.

[0044] like Figure 1-3 As shown, the thermal-magnetic tripping mechanism includes a current regulating unit 1 and a thermal-magnetic tripping unit 2, the current regulating unit 1 includes a support 10, a delay regulating component and an instantaneous regulating component, wherein the delay regulating component and the instantaneous regulating component are respectively rotatably arranged on the support 10, and the thermal-magnetic tripping unit 2 is cooperatively arranged on one side of the support 10. In this embodiment, the thermal-magnetic tripping unit 2 is arranged on the lower side of the support 10 when coordinated, and the armature 23 and the bimetallic part 25 in the thermal-magnetic tripping unit 2 are respectively coordinated with the instantaneous regulating component and the delay regulating component. The rectification effect of the thermal-magnetic tripping unit 2 can be adjusted by operating the instantaneous regulating component, and the thermal-magnetic tripping effect of the thermal-magnetic tripping mechanism can be correspondingly adjusted by operating the delay regulating component.

[0045] Among them, Figure 3-5 As shown in FIGS. 8-13 , the delay adjustment assembly includes a delay adjustment member 11, a traction rod 12 and a delay adjustment screw 131, wherein the delay adjustment member 11 and the traction rod 12 are rotatably arranged on the support member 10 respectively, the central axes of the delay adjustment member 11 and the traction rod 12 are perpendicular to each other, a delay matching portion 1213 is arranged on the traction rod 12, and the delay adjustment screw 131 is arranged on the delay matching portion 1213 and is spaced opposite to the bimetallic member 25. Rotating the delay adjustment member 11 can drive the traction rod 12 to move along the axial direction of the traction rod 12 itself, thereby adjusting the distance between the delay matching portion 1213 and the bimetallic member 25. Preferably, the delay adjustment screw 131 is made to face the bimetallic member 25, and the delay adjustment screw 131 is rotated to adjust the distance between the delay adjustment screw 131 and the bimetallic member 25, thereby achieving adjustment of the thermal tripping effect.

[0046] like Figure 3 , 6-As shown in Figures 12 and 14, the instantaneous adjustment component includes an instantaneous adjustment member 14, a linkage member 15 and an instantaneous adjustment screw 132, wherein the instantaneous adjustment member 14 and the linkage member 15 are rotatably arranged on the support member 10 respectively, and the central axis of the instantaneous adjustment member 14 and the linkage member 15 are perpendicular to each other. Rotating the instantaneous adjustment member 14 drives the linkage member 15 to rotate around the axis, thereby driving the elastic member 26 connected between the armature 23 and the linkage member 15, and changing the elastic deformation of the elastic member 26 and the force value on the armature 23 to achieve the rectification effect; the instantaneous adjustment screw 132 is connected to the bracket 21 of the thermal-magnetic trip unit 2 and cooperates with the armature 23. Rotating the instantaneous adjustment screw 132 changes the position of the armature 23 to further adjust the rectification effect of the thermal-magnetic trip unit 2.

[0047] Combination Figure 1-8 A specific structure of a current regulating unit 1 is provided, wherein a support member 10 is a frame structure having a cavity, a first operating hole 101 and a second operating hole 102 are provided on the top wall of the support member 10, a delay regulating member 11 and an instant regulating member 14 are rotatably arranged in the first operating hole 101 and the second operating hole 102, respectively, and a protruding delay limiting platform 105 (see Figure 6 , 7 ), the delay limit platform 105 cooperates with the first limit portion 114 provided on the delay adjustment member 11 to limit the rotation angle of the delay adjustment member 11, and the top wall of the support member 10 on one side of the second operating hole 102 is provided with a protruding instantaneous limit platform 106 (see Figure 6 , 7 ), the instantaneous adjustment member 14 is provided with a second limit portion 143, and the second limit portion 143 cooperates with the instantaneous limit platform 106 to limit the rotation angle of the instantaneous adjustment member 14; a side wall of the support member 10 is provided with a protruding support portion 104 (see Figure 6 ), preferably, the upper surface of the support portion 104 is an arcuate surface, and the linkage member 15 is rotatably arranged on the support portion 104. When the linkage member 15 is driven to rotate, the circumferential side wall of the linkage member 15 rotates in the arcuate surface; a pair of side walls of the support member 10 are provided with relative axial holes, and the traction rod 12 is rotatably arranged on the support member 10 through a pair of axial holes, and in the present embodiment, the traction rod 12 is located in the cavity of the support member 10; a limiting portion 103 is also provided on one side of the cavity of the support member 10, and a reset torsion spring 123 on the traction rod 12 cooperates with the limiting portion 103 to drive the traction rod 12 to reset and rotate. In the figure, the limiting portion 103 and the support portion 104 are located on opposite sides of the support member 10, and the limiting portion 103 is provided with a through hole, and the central axis of the through hole is perpendicular to the central axis of the axial hole.

[0048] like Figure 7As shown, a mounting portion is further provided on one side of the cavity of the support member 10. Preferably, an assembly groove is opened in the middle of the mounting portion, one end of the trigger member 16 is rotatably assembled in the assembly groove, and the other end of the trigger member 16 is provided with a second buckle portion 161. In this embodiment, the second buckle portion 161 of the trigger member 16 extends into the cavity of the support member 10 and is buckled with the first buckle portion 1217 of the traction rod 12. A spring limiting portion 107 is provided in the assembly groove, and a reset member 17 is provided between the spring limiting portion 107 and the trigger member 16. When the traction rod 12 and the trigger member 16 are released from the buckle fit, the reset member 17 drives the trigger member 16 to rotate in the assembly groove. When the main line is in a normal connected state, the trigger member 16 maintains a snap-fit ​​fit with the first snap-fit ​​portion 1217 of the traction rod 12; when a short circuit or overload fault occurs in the main line, the thermal-magnetic trip unit 2 triggers the operating mechanism to trip through the traction rod 12, that is, the traction rod 12 rotates, and the trigger member 16 and the snap-fit ​​portion 1217 of the traction rod 12 are released from the snap-fit, and the lifted trigger member 16 triggers the re-snap rotation in the operating mechanism, and the operating mechanism is activated, thereby powering off the switch device.

[0049] like Figure 3-6 As shown in Figures 1 and 13, the delay adjustment member 11 is rod-shaped as a whole, and the opposite ends of the delay adjustment member 11 serve as a first operating end 111 and a first driving end 112, respectively, wherein the first operating end 111 is located outside the cavity of the support member 10 for operating the delay operating member, and the first driving end 112 is located in the cavity of the support member 10. The first driving end 112 is provided with a protruding eccentric driving arm 113, and the eccentric driving arm 113 extends in a direction away from the first operating end 111 into the cavity of the support member 10 and is linked to the traction rod 12; a first limiting portion 114 is provided between the first operating end 111 and the first driving end 112, Fig.13 The outer diameter of the first limiting portion 114 is the largest, and an annular groove is opened in the circumferential direction around the first limiting portion 114. The edge of the first operating hole 101 can be embedded in the annular groove, and the axial movement of the delay adjusting member 11 can be limited during the rotation of the delay adjusting member 11. A notch groove is opened in the area of ​​the first limiting portion 114 located outside the support member 10, and the delay limiting platform 105 can move in the notch groove, thereby limiting the rotation angle of the delay adjusting member 11.

[0050] like Figure 3-6As shown in Figure 14, the instantaneous adjustment member 14 is rod-shaped as a whole, and the opposite ends of the instantaneous adjustment member 14 are respectively a second operating end 141 and a second driving end 142. The second operating end 141 is located outside the cavity of the support member 10, and the second driving end 142 is located in the cavity of the support member 10. The outer diameter of the second driving end 142 is the largest. The second driving end 142 is provided with a spiral adjustment surface that forms a height difference in the axial direction. The abutment portion 152 provided on the linkage member 15 extends into the cavity of the support member 10 and slides with the spiral adjustment surface. The second operating end 141 and the second driving end 142 are in contact with each other. A protruding second limiting portion 143 is provided in between, and the second limiting portion 143 is an annular boss surrounding the circumferential side wall of the instantaneous adjusting member 14. An annular groove is formed between the second limiting portion 143 and the second driving end 142. The edge of the second operating hole 102 can be embedded in the annular groove of the instantaneous adjusting member 14, and the instantaneous adjusting member 14 can be limited to move axially during the rotation of the instantaneous adjusting member 14. A boss is protruding from the edge of the second limiting portion 143, and the boss can abut against the instantaneous limiting platform 106 during the rotation process, thereby limiting the rotation angle of the instantaneous adjusting member 14.

[0051] like Figure 2 , 3 As shown in Figure 6, the linkage member 15 is in the shape of a straight rod as a whole. The linkage rod 15 is rotatably arranged on the support portion 104. The circumferential side wall of the linkage rod 15 is protrudingly provided with at least one connecting portion 151. The number of the connecting portions 151 corresponds to the number of the thermal-magnetic tripping units 2. In this embodiment, three connecting portions 151 are provided on the linkage rod 15. The three connecting portions 151 are arranged at intervals along the axial direction of the linkage rod 15, and each connecting portion 151 is a hook; the side wall of the linkage rod 15 is also provided with a protruding abutting portion 152, and the abutting portion 152 is abutted against the The connecting parts 151 are respectively located on the opposite sides of the linkage rod 15, and the ends of the abutting parts 152 gradually become thinner and extend into the cavity of the support member 10. When the instantaneous adjusting member 14 is rotated, the abutting parts 152 and the spiral adjusting surface will move along the axial direction of the instantaneous adjusting member 14 when sliding. At the same time, the connecting part 151 will also rise or fall in parallel with the axial direction of the instantaneous adjusting member 14, and drive the elastic member 26 connected between the armature 23 and the connecting part 151 to undergo elastic deformation, thereby adjusting the tripping action torque of the armature 23 in the thermal-magnetic tripping unit 2.

[0052] like Figure 3-7As shown, the traction rod 12 includes a traction rod body 121, a guide shaft 122 and a reset torsion spring 123. The traction rod body 121 is a rod body provided with an axial cavity 1211 as a whole. The guide shaft 122 is arranged on the support member 10 and slides through the axial cavity 1211, so that the traction rod body 121 can slide along the axial direction of the guide shaft 122 and rotate around the guide shaft 122. In this embodiment, the guide shaft 122 is made of existing glass fiber, which is conducive to enhancing the phase-to-phase insulation while ensuring the strength requirement; a delayed matching portion 1213 and an instantaneous matching portion 1214 are protruded on the outer side wall of the traction rod body 121, and the number of the delayed matching portion 1213 and the instantaneous matching portion 1214 matches the number of the thermal magnetic tripping units 2. Figure 7 In the embodiment, there are three delayed matching parts 1213 and three instant matching parts 1214, and two adjacent delayed matching parts 1213 and two adjacent instant matching parts 1214 are respectively arranged at intervals along the axial direction of the traction rod body 121. Figure 7 In the embodiment, the time delay matching part 1213 and the instantaneous matching part 1214 are respectively located on opposite sides of the traction rod body 121, and a screw hole 1216 is provided on the time delay matching part 1213. A time delay adjustment screw 131 is provided in the screw hole 1216. The time delay adjustment screw 131 is spaced opposite to the bimetallic member 25 in the thermal magnetic tripping unit 2. Rotating the time delay adjustment screw 131 can change the distance between the time delay adjustment screw 131 and the bimetallic member 25. A matching groove 1215 is also provided on the outer side of the traction rod body 121, and the eccentric driving arm 113 of the delay adjustment member 11 is connected to the matching groove 1215. 15 plug-in, when the delay adjusting member 11 is rotated, the eccentric driving arm 113 drives the traction rod body 121 to move axially along the guide shaft 122; a reset groove 1212 is provided at one end of the traction rod body 121, and the reset groove 1212 is surrounded and arranged on one side of the guide shaft 122. A reset torsion spring 123 sleeved on the guide shaft 122 corresponds to the reset groove 1212, one elastic arm of the reset torsion spring 123 is connected to the traction rod body 121, and the other elastic arm is abutted against the support member 10. In this embodiment, the other elastic arm of the reset torsion spring 123 is plugged into the through hole of the limiting portion 103.

[0053] In addition, a first buckle portion 1217 is also provided on the traction rod 12, and the first buckle portion 1217 is buckled with the second buckle portion 161 of the trigger member 16. In this embodiment, the first buckle portion 1217 is protrudingly provided on the traction rod body 121, and the number of the first buckle portions 1217 matches the number of the trigger members 16.

[0054] In this embodiment, the thermal-magnetic trip unit 2 includes a thermal tripper and a magnetic tripper, wherein the temperature sensing element 22 in the thermal tripper also serves as a conductive element in the magnetic tripper.

[0055] like Figure 9-12As shown, the magnetic release includes a bracket 21, a temperature sensing element 22, an armature 23, a yoke 24 and an elastic member 26, wherein the bracket 21 is fixed to the temperature sensing element 22, and the armature 23 is rotatably connected to the bracket 21, so that the first end of the armature 23 rotates on one side of the bracket 21, preferably, the yoke 24 is fixed to the temperature sensing element 22, and the second ends of the yoke 24 and the armature 23 are respectively located on both sides of the temperature sensing element 22, so that a magnetic gap is left between the yoke 24 and the second end of the armature 23, which can also be understood as the temperature sensing element 22 passes through the gap between the yoke 24 and the second end of the armature 23, and when a short circuit fault occurs, the yoke 24 It is attracted to the second end of the armature 23, and as the armature 23 rotates, the first end of the armature 23 triggers the rotation of the traction rod 12, and the temperature sensing element 22 cooperates with the yoke 24 and the armature 23 to achieve instantaneous protection, and also provides an assembly position for the bracket 21 and the yoke 24; the elastic member 26 is connected between the armature 23 and the connecting part 151 of the linkage member 15, and the rotating instantaneous adjustment component can pull the elastic member 26, and the elastic member 26 undergoes elastic deformation with the displacement of the connecting part 151, thereby achieving the control of the force applied by the elastic member 26 to the armature 23, adjusting the distance between the armature 23 and the yoke 24, and achieving the rectification effect.

[0056] In addition, in the present embodiment, the instantaneous adjustment screw 132 in the instantaneous adjustment assembly is rotatably assembled on the bracket 21, and the instantaneous adjustment screw 132 cooperates with the first end of the armature 23. Rotating the instantaneous adjustment screw 132 can change the distance between the first end of the armature 23 and the bracket 21 and the traction rod 12, and correspondingly changes the distance between the second end of the armature 23 and the yoke 24.

[0057] like Figure 9-12 As shown, the thermal release includes a bimetallic member 25 and a temperature sensing element 22. The second end of the bimetallic member 25 is fixed on the temperature sensing element 22. The first end of the bimetallic member 25 is spaced relative to the traction rod 12 to trigger the rotation of the traction rod 12. That is, in the thermal-magnetic trip unit 2, the first end of the bimetallic member 25 and the first end of the armature 23 are respectively located on both sides of the traction rod 12. The temperature sensing element 22 can provide an assembly position for the bimetallic member 25 and cooperate with the bimetallic member 25 to achieve delayed protection. Compared with the existing thermal-magnetic trip unit 2, a conductive member can be omitted, which simplifies the structure of the thermal-magnetic trip unit 2 and facilitates assembly.

[0058] Combination Figure 2 , 9-12 provides a specific structure of a thermal magnetic tripping mechanism, wherein the bracket 21, the temperature sensing element 22 and the bimetallic member 25 are all plate-shaped structures, the bracket 21 and the bimetallic member 25 are spaced apart from each other and are respectively arranged in a direction perpendicular to the temperature sensing element 22, the second ends of the bracket 21 and the bimetallic member 25 respectively extend outward to form a connecting plate, the planes where the two connecting plates are located are respectively parallel to the planes where the temperature sensing element 22 is located, the bracket 21 and the bimetallic member 25 are respectively fixedly connected to the temperature sensing element 22 through their respective connecting plates, a pair of spaced apart wing plates are provided on the two side edges of the bracket 21, a connecting shaft 27 is provided between the pair of wing plates, the connecting shaft 27 is located between the bimetallic member 25 and the bracket 21, the first end of the armature 23 cooperates with the traction rod 12, a limiting member 251 is provided at the first end of the bimetallic member 25, the side of the limiting member 251 facing the traction rod 12 is an inclined surface, and the inclined surface of the limiting member 251 is spaced apart from the delay adjustment screw 131.

[0059] like Fig.11 As shown, the armature 23 includes a first plate 231 and a second plate 232 connected at an angle, wherein the first plate 231 as the first end of the armature 23 is in the shape of a strip plate, and one end of the first plate 231 away from the second plate 232 is bent to form a striking portion 233, the armature 23 and the bimetallic member 25 are respectively located on opposite sides of the traction rod 12, the second plate 232 as the second end of the armature 23, the plane where the second plate 232 is located is parallel to the plane where the temperature sensing element 22 is located, and a pair of ear plates are provided on opposite sides of the second plate 232, and the ear plates are provided with shaft holes for the connecting shaft 27 to pass through, so that the armature 2 The first plate 231 and the second plate 232 are rotatably disposed between the bracket 21 and the bimetallic member 25. The second end of the armature 23 is also provided with an avoidance groove 234, through which the bimetallic member 25 passes, so as to avoid the armature 23 and the bimetallic member 25 from interfering with each other when performing the tripping action. A spring hole is provided at the junction of the first plate 231 and the second plate 232. The yoke 24 is fixedly disposed on the side of the temperature sensing element 22 facing away from the bracket 21, and the two side edges of the yoke 24 are bent and extended toward the direction close to the armature 23, so that the two side edges of the yoke 24 and the second end of the armature 23 are spaced relative to each other to form a magnetic gap.

[0060] The elastic member 26 is a spring, one end of which is connected to the connecting portion 151 of the linkage member 15, and the other end of which is connected to the spring hole. Figure 2 In the figure, the elastic member 26 is obliquely arranged in the interval between the bracket 21 and the bimetallic member 25, and the elastic member 26 includes a twisted portion, wherein the twisted portion is located in a region closer to the linkage rod 15, one end of the twisted portion extends outward to form a connecting ring for hanging on the connecting portion 151, and the other end of the twisted portion extends obliquely between the bracket 21 and the bimetallic member 25 and is connected to the spring hole arranged on the armature 23, thereby, the rotating instantaneous adjustment member 14 can adjust the position of the armature 23 through the elastic member 26.

[0061] An instantaneous adjustment screw 132 is provided between the bracket 21 and the first end of the armature 23. In the present embodiment, the instantaneous adjustment screw 132 is provided on the bracket 21. Rotating the instantaneous adjustment screw 132 can change the gap between the armature 23 and the yoke 24, thereby achieving the adjustment of the rectification effect.

[0062] In addition, the thermal-magnetic trip unit 2 of this embodiment may also adopt the existing technology.

[0063] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0064] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A thermal magnetic tripping mechanism, comprising a current regulating unit (1) and a thermal magnetic tripping unit (2), wherein the current regulating unit (1) comprises a support (10) and an instantaneous regulating component and a time delay regulating component respectively rotatably arranged on the support (10), wherein the thermal magnetic tripping unit (2) is arranged on one side of the support (10), wherein the thermal magnetic tripping unit (2) comprises an armature (23) and a bimetallic member (25), wherein the instantaneous regulating component and the time delay regulating component are respectively rotated to correspondingly adjust the tripping action stroke of the armature (23) and the bimetallic member (25), wherein: The delay adjustment assembly comprises a traction rod (12) and a delay adjustment member (11); the traction rod (12) and the delay adjustment member (11) are respectively rotatably arranged on a support member (10); the delay adjustment member (11) is rotated to drive the traction rod (12) to move axially; and the armature (23) and the bimetallic member (25) respectively drive the traction rod (12) to rotate around the axis.

2. The thermal magnetic tripping mechanism according to claim 1, characterized in that: The delay adjustment assembly further comprises a delay adjustment screw (131), wherein the delay adjustment screw (131) is rotatably disposed on the traction rod (12) and is spaced apart from and opposite to the bimetallic member (25).

3. The thermal magnetic tripping mechanism according to claim 2, characterized in that: The support member (10) is provided with a first matching hole, and the opposite ends of the delay adjustment member (11) are respectively a first operating end (111) and a first driving end (112), the first driving end (112) rotates through the first matching hole and is provided with a protruding eccentric driving arm (113), the traction rod (12) is provided with a matching groove (1215), and the eccentric driving arm (113) is plugged into the matching groove (1215).

4. The thermal magnetic tripping mechanism according to claim 3, characterized in that: The traction rod (12) comprises a traction rod body (121), a guide shaft (122) and a return torsion spring (123); the traction rod body (121) is provided with an axial cavity (1211); the guide shaft (122) is arranged on the support member (10) and slides through the axial cavity (1211), so that the traction rod body (121) rotates around the guide shaft (122) and moves along the axial direction of the guide shaft (122); the outer side wall of the traction rod body (121) is protruded with an instantaneous mating portion (1214) and a delayed matching portion (1213), the instantaneous matching portion (1214) matches with the armature (23), the delayed matching portion (1213) is provided with an adjusting screw, the outer side of the traction rod body (121) is also provided with a matching groove (1215) connected with the delay adjusting member (11), the reset torsion spring (123) is sleeved on the guide shaft (122), and the two elastic arms of the reset torsion spring (123) are respectively connected with the support member (10) and the traction rod body (121).

5. The thermal magnetic tripping mechanism according to claim 1, characterized in that: The instantaneous adjustment component comprises an instantaneous adjustment member (14) and a linkage member (15); the support member (10) is provided with a second matching hole; the opposite ends of the instantaneous adjustment member (14) are respectively a second operating end (141) and a second driving end (142); the second driving end (142) is provided with a spiral adjustment surface; the linkage member (15) is provided with a connecting portion (151) and a supporting portion (152); an elastic member (26) is connected between the connecting portion (151) and the armature (23); the supporting portion (152) slides along the spiral adjustment surface to adjust the traction force of the elastic member (26) on the armature (23).

6. The thermal magnetic tripping mechanism according to claim 5, characterized in that: The instantaneous adjustment component also includes an instantaneous adjustment screw (132), the thermal magnetic tripping unit (2) includes a bracket (21), the armature (23) is rotatably connected to the bracket (21), and the instantaneous adjustment screw (132) is arranged on the bracket (21) and cooperates with the armature (23).

7. The thermal magnetic tripping mechanism according to claim 1, characterized in that: The support member (10) is rotatably equipped with a trigger member (16), a mutually limiting buckle structure is provided between the trigger member (16) and the traction rod (12), and a reset member (17) is provided between the trigger member (16) and the support member (10).

8. The thermal magnetic tripping mechanism according to claim 1, characterized in that: The thermal magnetic trip unit (2) comprises a bracket (21), a temperature sensing element (22), an armature (23), a yoke (24) and a bimetallic member (25). The temperature sensing element (22) and the yoke (24) are respectively fixed on the bracket (21). The armature (23) is rotatably connected to the bracket (21), so that the first end of the armature (23) rotates on one side of the bracket (21) to drive the traction rod (12). The second end of the armature (23) and the yoke (24) are respectively located on opposite sides of the temperature sensing element (22), so that a magnetic gap is left between the second end of the armature (23) and the yoke (24). An elastic member (26) is connected between the armature (23) and the instantaneous adjustment component. The second end of the bimetallic member (25) is fixedly connected to the temperature sensing element (22). The traction rod (12) is located between the first end of the bimetallic member (25) and the first end of the armature (23).

9. The thermal magnetic tripping mechanism according to claim 8, characterized in that: The armature (23) is rotatably arranged between the bracket (21) and the bimetallic member (25); a second end portion of the armature (23) is provided with an avoidance groove (234) for avoiding the bimetallic member (25); the elastic member (26) is obliquely arranged in the interval between the bracket (21) and the bimetallic member (25); and two ends of the elastic member (26) are respectively connected to the second end of the armature (23) and the instantaneous adjustment component.

10. The thermal magnetic tripping mechanism according to claim 4, characterized in that: The guide shaft (122) is made of glass fiber material.

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