A circuit breaker trip linkage

Abstract

The utility model discloses a circuit breaker tripping linkage mechanism, it includes the traction rod body, is provided with the thermal release linkage structure, the magnetic release linkage structure and the magnetic flux release linkage structure on the traction rod body in different positions, thermal release linkage structure, magnetic release linkage structure and magnetic flux release linkage structure can be corresponding with thermal release and / or magnetic release and / or magnetic flux release linkage, when circuit overload, thermal release, magnetic release, magnetic flux release can realize circuit breaker release through driving the traction rod action. Traction rod and thermal release, magnetic release, magnetic flux release can all be linked, improved the versatility of traction rod, simultaneously, the linkage contact position of traction rod and thermal release is adjustable. Prolonged the service life of thermal release.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, specifically relating to a circuit breaker tripping linkage mechanism. Background Technology

[0002] In low-voltage power distribution systems, circuit breakers mainly consist of an operating mechanism and a trip unit. When an overload or short-circuit fault occurs in the line, the trip unit causes the operating mechanism to trip, thereby disconnecting the circuit. Trip units are classified into thermal trip units, magnetic trip units, and flux trip units, etc. When the circuit is overloaded, the relevant components of the trip unit are linked with the traction rod of the operating mechanism, and the traction rod is acted upon to drive the operating mechanism to achieve the tripping function. However, existing circuit breakers can only link one type of traction rod with either a thermal trip unit, a magnetic trip unit, or a flux trip unit. The traction rods of different types of products cannot be linked with thermal trip units, magnetic trip units, or flux trip units, resulting in poor versatility.

[0003] Chinese Patent 202322980378.X discloses an integrated adjustable traction rod, which includes a traction rod linked to a trip unit and an adjusting rod movably mounted on the traction rod and cooperating with the bimetallic strip of the trip unit. The upper surface of the traction rod forms a snap-fit ​​structure with a guide gap. The adjusting rod can slide within the guide gap and its vertical movement is restricted by the snap-fit ​​structure. The rear side of the adjusting rod has several adjusting surfaces that cooperate with the bimetallic strip, and the upper side of the adjusting rod has a mating part that can cooperate with an adjusting button. Movement of the adjusting rod relative to the traction rod causes the bimetallic strip to change its mating position with the adjusting surfaces. Making the adjusting rod and traction rod an integrated, modular structure saves internal product space. Furthermore, the structure on the upper surface of the traction rod allows for sliding and limiting of the adjusting rod, making the cooperation between the two more reliable and simplifying assembly, thus improving production efficiency. However, this integrated adjustable traction rod only links to a thermal trip unit and is not suitable for thermomagnetic or electronic products, indicating poor versatility.

[0004] utility model

[0005] The purpose of this invention is to address the shortcomings of existing traction rods, which cannot be linked with thermal trip units, magnetic trip units, and flux trip units, resulting in poor versatility. This invention provides a circuit breaker tripping linkage mechanism that allows the traction rod to be linked with thermal trip units, magnetic trip units, and flux trip units, improving the versatility of the traction rod. Furthermore, the linkage contact position between the traction rod and the thermal trip unit is adjustable, extending the service life of the thermal trip unit.

[0006] Technical solution

[0007] To achieve the above technical objectives, this utility model provides a circuit breaker tripping linkage mechanism, which includes a traction rod body. The traction rod body is equipped with a thermal tripping linkage structure, a magnetic tripping linkage structure, and a magnetic flux tripping linkage structure at different positions. These structures can be linked with the thermal trip unit and / or the magnetic trip unit and / or the magnetic flux trip unit respectively. When the circuit is overloaded, the thermal trip unit, the magnetic trip unit, and the magnetic flux trip unit can drive the traction rod to trip the circuit breaker.

[0008] Preferably, the traction rod body is provided with a heat-adjustable mechanism, the heat-adjustable mechanism including an adjustable rod, the adjustable rod being installed in a slot on the traction rod body and being able to slide in the slot.

[0009] Preferably, the thermal release linkage structure is an adjustable inclined surface provided on a protruding plate extending from the traction rod body and on the corresponding end of the adjustable rod and the thermal release device.

[0010] Preferably, the magnetic tripping linkage structure is surface two on the protrusion extending from the traction rod body; the thermal tripping linkage structure is located on the traction rod body at the corresponding position where the circuit breaker requires thermal tripping protection, and the magnetic tripping linkage structure is located on one side of the thermal tripping linkage structure.

[0011] Preferably, the magnetic flux release linkage structure is surface three on the protruding strip extending from the traction rod body; the magnetic flux release linkage structure is located in the middle of the traction rod body.

[0012] Preferably, the armature in the magnetic trip unit extends out of the linkage rod, and a bent surface is provided on the linkage rod at a position corresponding to the magnetic trip linkage structure. When the circuit is overloaded, the armature is attracted and flipped, so that the rounded corner formed by the bent surface contacts the second surface, thereby realizing magnetic tripping.

[0013] Preferably, the striking rod in the magnetic flux trip device corresponds to the magnetic flux trip linkage structure. When the circuit is overloaded, the striking rod extends and contacts the surface three, thereby realizing magnetic flux tripping.

[0014] Preferably, the adjustable rod can be limited by the limiting part on the traction rod during its sliding in the slot; an adjustable inclined surface is provided on one end of the adjustable rod corresponding to the thermal release device, and a sliding adjustment mechanism is provided on the other end of the adjustable rod. The adjustable rod slides back and forth under the action of the sliding adjustment mechanism, thereby adjusting the distance between the adjustable inclined surface and the double gold screw; the sliding adjustment mechanism includes a stop block extending from the adjustable rod, and the stop block is located on the rear side of the adjustable rod.

[0015] Preferably, the limiting part is a side surface on the protrusion that corresponds to the adjustable rod; the slot includes a slot one on the upper side of the rear surface of the traction rod and a slot two on the lower side of the rear surface of the traction rod; the adjustable rod is provided with a boss, which can slide in the slot one.

[0016] Beneficial effects

[0017] This utility model provides a circuit breaker tripping linkage mechanism, which includes a traction rod body 1. The traction rod body 1 is equipped with a thermal tripping linkage structure 2, a magnetic tripping linkage structure 3, and a magnetic flux tripping linkage structure 4 at different positions. These structures can be linked with a thermal trip unit 5 and / or a magnetic trip unit 6 and / or a magnetic flux trip unit 7, respectively. When the circuit is overloaded, the thermal trip unit 5, magnetic trip unit 6, and magnetic flux trip unit 7 can drive the traction rod 1 to trip the circuit breaker. The traction rod can be linked with the thermal trip unit, magnetic trip unit, and magnetic flux trip unit, improving its versatility. Furthermore, the linkage contact position between the traction rod and the thermal trip unit is adjustable, extending the service life of the thermal trip unit. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Appendix Figure 1 This is a schematic diagram of the three-dimensional structure of the thermal tripping linkage according to an embodiment of this utility model;

[0020] Appendix Figure 2 This is a three-dimensional structural diagram of the traction rod according to an embodiment of the present utility model;

[0021] Appendix Figure 3 This is a schematic diagram of the three-dimensional structure of the adjustable rod according to an embodiment of the present invention;

[0022] Appendix Figure 4 This is a schematic diagram of the magnetic tripping linkage of an embodiment of this utility model;

[0023] Appendix Figure 5 This is a schematic diagram of the armature structure according to an embodiment of the present invention;

[0024] Appendix Figure 6 This is a schematic diagram of the magnetic flux tripping linkage of an embodiment of this utility model;

[0025] Appendix Figure 7 This is a schematic diagram of the magnetic flux trip device according to an embodiment of this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0031] Example

[0032] Existing tow bars cannot be linked with thermal trip units, magnetic trip units, or flux trip units, resulting in poor versatility. To solve this problem, see attached... Figures 1-7 As shown, this embodiment provides a circuit breaker tripping linkage mechanism, which includes a traction rod body 1. The traction rod body 1 is equipped with a thermal tripping linkage structure 2, a magnetic tripping linkage structure 3, and a magnetic flux tripping linkage structure 4 at different positions. These structures can be linked with a thermal trip unit 5 and / or a magnetic trip unit 6 and / or a magnetic flux trip unit 7, respectively. When the circuit is overloaded, the thermal trip unit 5, magnetic trip unit 6, and magnetic flux trip unit 7 can drive the traction rod 1 to trip the circuit breaker. Preferably, in this embodiment, the thermal tripping linkage structure 2 is located on the traction rod body 1 at a position corresponding to the location where the circuit breaker requires thermal tripping protection. The magnetic tripping linkage structure 3 is located on one side of the thermal tripping linkage structure 2; in this embodiment, the magnetic tripping linkage structure 3 is located to the left of the thermal tripping linkage structure 2. The magnetic flux tripping linkage structure 4 is located in the middle of the traction rod body 1 and to the left of the magnetic tripping linkage structure 3.

[0033] As attached Figure 2 As shown, the thermal trip linkage structure 2 is surface 22 on the protrusion 21 extending from the traction rod body 1. A bimetallic strip 51 in the thermal trip unit 5 has a bimetallic screw 52 at one end corresponding to the thermal trip linkage structure 2. When the circuit is overloaded, the bimetallic strip 51 bends, causing the bimetallic screw 52 to contact surface 22, thereby achieving thermal tripping.

[0034] As attached Figure 2 As shown, the magnetic release linkage structure 3 is surface 32 on the protrusion 31 extending from the traction rod body 1. (See attached diagram) Figure 4 and 5 As shown, the armature 61 in the magnetic trip unit 6 extends out of the linkage rod 62. A bent surface 62a is provided on the linkage rod 62 at a position corresponding to the magnetic trip linkage structure 3. When the circuit is overloaded, the armature 61 is attracted and flipped, so that the rounded corner formed by the bent surface 62a contacts the surface 32, thereby realizing magnetic tripping.

[0035] As attached Figure 2 As shown, the magnetic flux release linkage structure 4 is surface 42 on the protruding strip 41 extending from the traction rod body 1. (See attached diagram) Figure 6 and 7As shown, the striking rod 71 in the flux trip unit 7 corresponds to the flux trip linkage structure 4. When the circuit is overloaded, the striking rod 71 extends, making contact with the face 42, thereby achieving flux tripping. The flux trip unit 7 also includes a reset rod 72. After flux tripping, when the circuit breaker trips again, the operating mechanism pushes the reset rod 72, causing the striking rod 71 to retract, thus resetting the flux trip unit 7.

[0036] As attached Figure 1 As shown, the traction rod body 1 is equipped with a heat-adjustable mechanism 8. (See attached diagram) Figure 3 As shown in the attached figure, the thermally adjustable mechanism 8 includes an adjustable rod 81, which is mounted in a slot 82 on the traction rod 1 and can slide within the slot 82. During its sliding motion within the slot 82, the adjustable rod 81 is limited by a limiting part 83 on the traction rod 1. More specifically, as shown in the attached figure, the thermal trip linkage structure 2 further includes an adjustable inclined surface 84 on one end of the adjustable rod 81 corresponding to the thermal trip unit 5. The other end of the adjustable rod 81 is provided with a sliding adjustment mechanism 85. The lower part of the sliding adjustment mechanism 85 is an eccentric shaft. Rotating the sliding adjustment mechanism 85 causes the adjustable rod 81 to slide back and forth left and right under the action of the eccentric shaft, thereby adjusting the distance between the adjustable inclined surface 84 and the bimetallic screw 52. When the set current is 1 times the rated current, during circuit overload, the bimetallic strip 51 bends, causing the bimetallic screw 52 to contact the surface 22, which is a flat surface, thus achieving thermal tripping. When the set current is less than 1 times, the bimetallic strip 51 bends during circuit overload, causing the bimetallic screw 52 to contact the adjustable inclined surface 84, thereby achieving thermal tripping. As shown in the attached figure, the limiting part 83 is further defined as a side surface on the protrusion 31 corresponding to the adjustable rod 81. The slot 82 includes a slot 1 821 on the upper side of the rear surface of the traction rod 1 and a slot 2 822 on the lower side of the rear surface of the traction rod 1. Preferably, there are two slots 1 821 and two slots 2 822, ensuring reliable movement of the adjustable rod 81. A boss 86 is provided on the adjustable rod 81, which can slide within the slot 1 821. The sliding adjustment mechanism 85 includes stops 81a and 81b extending from the adjustable rod 81 and a knob 9. A groove 81c is formed between the stops 81a and 81b to mate with the eccentric shaft at the lower part of the knob 9. The stops 81a and 81b are located on the rear side of the adjustable rod 81. Rotating the knob 9 causes the adjustable rod 81 to slide left and right, thereby changing the contact position between the double gold screw 52 and the adjustable inclined surface 84 to achieve thermally adjustable performance.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A circuit breaker tripping linkage mechanism, characterized in that: It includes a traction rod body (1), on which a thermal trip linkage structure (2), a magnetic trip linkage structure (3) and a magnetic flux trip linkage structure (4) are provided at different positions. The thermal trip linkage structure (2), the magnetic trip linkage structure (3) and the magnetic flux trip linkage structure (4) can be linked with the thermal trip unit (5) and / or the magnetic trip unit (6) and / or the magnetic flux trip unit (7) respectively. When the circuit is overloaded, the thermal trip unit (5), the magnetic trip unit (6) and the magnetic flux trip unit (7) can drive the traction rod body (1) to trip the circuit breaker.

2. The circuit breaker tripping linkage mechanism as described in claim 1, characterized in that: The traction rod body (1) is provided with a heat-adjustable mechanism (8), which includes an adjustable rod (81). The adjustable rod (81) is installed in a slot (82) on the traction rod body (1) and can slide in the slot (82).

3. The circuit breaker tripping linkage mechanism as described in claim 2, characterized in that: The thermal trip linkage structure (2) is the surface (22) on the protruding plate (21) extending from the traction rod body (1) and the adjustable inclined surface (84) provided on the end of the adjustable rod (81) corresponding to the thermal trip device (5).

4. The circuit breaker tripping linkage mechanism as described in claim 1, characterized in that: The magnetic release linkage structure (3) is surface two (32) on the protrusion (31) extending from the traction rod body (1); The thermal trip linkage structure (2) is located on the traction rod body (1) at the corresponding position where the circuit breaker needs thermal trip protection, and the magnetic trip linkage structure (3) is located on one side of the thermal trip linkage structure (2).

5. The circuit breaker tripping linkage mechanism as described in claim 1, characterized in that: The magnetic flux release linkage structure (4) is surface three (42) on the protruding strip (41) extending from the traction rod body (1); the magnetic flux release linkage structure (4) is located in the middle of the traction rod body (1).

6. The circuit breaker tripping linkage mechanism as described in claim 1, characterized in that: The armature (61) in the magnetic trip unit (6) extends out of the linkage rod (62). A bent surface (62a) is provided on the linkage rod (62) at a position corresponding to the magnetic trip linkage structure (3). When the circuit is overloaded, the armature (61) is attracted and flipped, so that the rounded corner formed by the bent surface (62a) contacts the second surface (32), thereby realizing magnetic tripping.

7. The circuit breaker tripping linkage mechanism as described in claim 1, characterized in that: The strike rod (71) in the magnetic flux trip device (7) corresponds to the magnetic flux trip linkage structure (4). When the circuit is overloaded, the strike rod (71) extends, so that the strike rod (71) contacts the surface three (42), thereby realizing magnetic flux trip.

8. The circuit breaker tripping linkage mechanism as described in claim 2, characterized in that: The adjustable rod (81) can be limited by the limiting part (83) on the traction rod body (1) during the sliding process in the slot (82); An adjustable ramp (84) is provided on one end of the adjustable rod (81) corresponding to the thermal trip unit (5), and a sliding adjustment mechanism (85) is provided on the other end of the adjustable rod (81). The adjustable rod (81) slides back and forth under the action of the sliding adjustment mechanism (85) to adjust the distance between the adjustable ramp (84) and the double gold screw (52). The sliding adjustment mechanism (85) includes a stop (81a, 81b) extending from the adjustable rod (81), and the stop (81a, 81b) is located on the rear side of the adjustable rod (81).

9. A circuit breaker tripping linkage mechanism as described in claim 8, characterized in that: The limiting part (83) is a side of the protrusion (31) extending from the traction rod body (1) that corresponds to the adjustable rod (81); The slot (82) includes a slot one (821) provided on the upper side of the rear surface of the traction rod body (1) and a slot two (822) provided on the lower side of the rear surface of the traction rod body (1). The adjustable rod (81) is provided with a boss (86), which can slide in the slot (821).

Images