Electromagnetic tripping device and electrical device

Abstract

The utility model provides an electromagnetic tripping device. The electromagnetic tripping device comprises a breaking unit and a tripping unit, the breaking unit comprises: a breaking unit housing; the static contact conducting bar is fixed on the breaking unit shell and extends out of the breaking unit shell; and the tripping part is configured to be capable of being triggered to enable the breaking unit to complete a tripping action. The tripping unit comprises: a tripping unit housing; and the triggering piece can be movably arranged on the tripping unit shell relative to the tripping unit shell. The tripping unit is integrally and detachably mounted to the breaking unit, and when the tripping unit is mounted to the breaking unit and the current flowing through the static contact conducting bar exceeds a threshold value, the triggering piece moves relative to the tripping unit shell to trigger the tripping causing piece. The utility model further provides an electrical device comprising the electromagnetic tripping device.

Description

Technical Field

[0001] The present disclosure relates to the electrical field, and in particular to an electromagnetic tripping device and an electrical device including the electromagnetic tripping device. Background Art

[0002] The electromagnetic tripping device of the circuit breaker is generally composed of an armature, a yoke, a traction rod, an adjustment device, a striking rod and its driving spring and a meniscus. In the prior art, the load copper bar of some electromagnetic tripping devices is connected to the static contact by screws. When the current passing through the load copper bar reaches the set current, the yoke attracts the armature to move, hits the traction rod and moves the traction rod. The movement of the traction rod causes the spring contact bias of the striking rod. The spring energy release causes the striking rod to hit the meniscus to move the meniscus, thereby completing the tripping action of the mechanism. This electromagnetic tripping device technology is relatively mature and reliable, but it is relatively large in size, the parts are relatively complex, and the cost is relatively high. Most importantly, the tripping action is completed by releasing the elastic potential energy of the spring through the electromagnetic mechanism. This process takes a certain amount of time, which will cause a delay in the tripping action. In addition, the tripping speed is mainly determined by the release speed of the spring potential energy, and the tripping speed cannot be adjusted.

[0003] In the prior art, there are also some devices that use an electromagnet to directly drive the mechanism to achieve tripping, which is provided with a bias spring that can adjust the tripping force, but the replacement of the bias spring is troublesome, and multiple parts need to be disassembled at the same time to achieve replacement. These devices include multiple parts, and the multiple parts must meet certain matching relationships and matching accuracy. The installation is not convenient, the maintainability is poor, and some parts are not well positioned, which may affect the electromagnet's attraction stability, which brings safety hazards.

[0004] Therefore, an electromagnetic tripping device that is easy to install is needed to solve these problems. Utility Model Content

[0005] The purpose of the present disclosure is to at least solve the shortcomings existing in the prior art. The present disclosure proposes an electromagnetic tripping device, including a disconnecting unit and a tripping unit. The disconnecting unit includes: a disconnecting unit housing; a static contact conductive row, fixed on the disconnecting unit housing and extending out of the disconnecting unit housing; a tripping member, configured to be triggered to enable the disconnecting unit to complete the tripping action. The tripping unit includes: a tripping unit housing; a triggering member, which can be movably mounted on the tripping unit housing relative to the tripping unit housing. The tripping unit is detachably mounted to the disconnecting unit as a whole. When the tripping unit is mounted to the disconnecting unit, when the current flowing through the static contact conductive row exceeds a threshold value, the triggering member moves relative to the tripping unit housing to trigger the tripping member.

[0006] For example, according to some embodiments of the present disclosure, the static contact conductive bar is fixed on the disconnecting unit housing and has an extension section and an external section extending in a first direction, the external section is located at the free end of the static contact conductive bar and extends out of the disconnecting unit housing. The disconnecting unit further includes a yoke, which is fixed on the disconnecting unit housing adjacent to the extension section.

[0007] For example, according to some embodiments of the present disclosure, the trigger member can be pivotally mounted on the trip unit housing. The trip unit also includes: an armature, which is configured to be able to move between a first position and a second position in a second direction relative to the trip unit housing; a pull rod, which is configured to extend in the second direction, the pull rod having a first end and a second end, the first end being connected to the armature to move together with the armature in the second direction relative to the trip unit housing, the trigger member cooperates with the second end of the pull rod so that the movement of the pull rod from the first position toward the second position causes the trigger member to pivot. Wherein, when the trip unit is mounted to the disconnecting unit, the second direction is perpendicular to the first direction, the second position is closer to the extension section than the first position, the pivoting of the trigger member can trigger the trip member, and when the current flowing through the static contact conductive row exceeds a threshold value, the yoke attracts the armature to move toward the extension section along the second direction to the second position.

[0008] For example, according to some embodiments of the present disclosure, the trip unit further includes a return spring, which is detachably mounted to the trip unit housing, and the return spring biases the armature to the first position.

[0009] For example, according to some embodiments of the present disclosure, the return spring is a torsion spring, one end of the return spring is connected to the pull rod, the trip unit housing includes a plurality of accommodating portions, and the other end of the return spring extends into one of the plurality of accommodating portions. Extending into different accommodating portions allows the return spring to have different degrees of pre-deformation.

[0010] For example, according to some embodiments of the present disclosure, the trip unit includes a support column extending perpendicular to the second direction, one end of the support column is a free end, and the annular section of the reset spring is sleeved on the support column.

[0011] For example, according to some embodiments of the present disclosure, the trip unit further includes a guide slot extending along the second direction, and the pull rod includes a protrusion extending into the guide slot, so that the pull rod moves along the guide slot in the second direction.

[0012] For example, according to some embodiments of the present disclosure, the yoke includes a first segment and a second segment relative to each other, and a connecting segment connecting the first segment and the second segment and has a "U"-shaped structure, the opening of the "U" shape faces the armature, and the extension segment is arranged between the first segment and the second segment.

[0013] For example, according to some embodiments of the present disclosure, the trip unit housing also includes a guide portion, which includes two first surfaces that are perpendicular to the third direction and face each other, and two second surfaces that are perpendicular to the third direction and face away from each other, the plane where the two first surfaces are located is located between the planes where the two second surfaces are located, the third direction is perpendicular to the first direction and the second direction, the armature moves along the second direction between the two relative first surfaces, and the two second surfaces are located between the first section and the second section of the yoke and respectively abut against the first section and the second section of the yoke along the third direction.

[0014] For example, according to some embodiments of the present disclosure, the electromagnetic tripping device includes a plurality of breaking units.

[0015] For example, according to some embodiments of the present disclosure, the trip unit includes two sets of armatures, a pull rod, a return spring and a trigger member, wherein all the trigger members share a pivot axis and pivot synchronously.

[0016] The present disclosure also provides an electrical device, comprising the electromagnetic tripping device according to any one of the above contents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic cross-sectional plan view of an electromagnetic tripping device according to an embodiment of the present disclosure is shown;

[0018] Figure 2a and Figure 2b A three-dimensional schematic diagram of a trip unit according to an embodiment of the present disclosure is shown, wherein Figure 2a It is a complete three-dimensional schematic diagram of the trip unit. Figure 2b In order to facilitate the display, the housing of the trip unit is partially cut away to reveal its internal structure;

[0019] Figure 3a and Figure 3b Show Figure 2a and Figure 2b Schematic diagram of the coordination relationship between the trip unit, the static contactor bar and the yoke. Figure 3a In order to facilitate the display, the housing of the trip unit is cut open to reveal its internal structure. Figure 3b It is a plan view and the guide portion is cut away for illustration;

[0020] Figure 4 Shown including Figure 2a and Figure 2b A three-dimensional schematic diagram of an electromagnetic tripping device of a tripping unit;

[0021] Figure 5 A three-dimensional schematic diagram showing a trip unit according to another embodiment of the present disclosure;

[0022] Figure 6 Shown including Figure 5 A three-dimensional schematic diagram of the electromagnetic tripping device of the tripping unit.

[0023] Reference numerals

[0024] 1 breaking unit, 11 breaking unit housing, 12 static contact conductive row, 121 extension section, 122 external section, 13 tripping member, 14 yoke, 141 first section, 142 second section, 143 third section, 2 tripping unit, 21 tripping unit housing, 22 armature, 23 pull rod, 231 first end, 232 second end, 233 tab, 24 trigger member, 25 reset spring, 26 accommodating portion, 27 supporting column, 28 guide groove, 29 guide portion, 291 first surface, 292 second surface,

[0025] D1 first direction, D2 second direction, D3 third direction DETAILED DESCRIPTION

[0026] In order to make the purpose, scheme and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0027] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0028] For the convenience of explanation, in the present disclosure, the direction in which the static contact conductive bar extends out of the disconnecting unit housing is designated as the first direction, the direction in which the pull rod moves is designated as the second direction, and the direction perpendicular to the first direction and the second direction is designated as the third direction. The first direction D1, the second direction D2, and the third direction D3 are as follows: Figure 2a and Figure 3a As indicated by the arrow in .

[0029] According to the embodiments of the present disclosure, Figure 1 and Figure 4 As shown, the electromagnetic tripping device may include a breaking unit 1 and a tripping unit 2, and the tripping unit 2 may be detachably mounted to the breaking unit 1 as a whole. In particular, the breaking unit 1 may include a breaking unit housing 11, a static contact conductive bar 12, a tripping member 13, and a yoke 14, and the tripping unit 2 may include a tripping unit housing 21, an armature 22, a pull rod 23, a reset spring 25, a trigger member 24, a plurality of accommodating portions 26, and a guide portion 29. The tripping unit 2 integrating the above-mentioned multiple components may be disassembled and replaced as a whole from the breaking unit as a separate module unit, and in particular, the tripping unit 2 and the breaking unit 1 may be detachably mounted by means of snaps, screw connections, and the like.

[0030] In addition, it is only necessary to install the trip unit 2 to realize the installation of multiple components in the entire electromagnetic trip device, and ensure that the relative positions of the multiple components meet the functional requirements, which greatly reduces the assembly process and prevents unstable tripping caused by possible assembly misalignment. In particular, the most suitable trip unit can be selected or replaced for a specific application scenario, for example, a trip unit with the most suitable trip force size can be selected according to the required trip current, without the need for customized assembly and design of the entire device.

[0031] Specifically, Figure 1 and Figure 3a As shown, the static contact conductive bar 12 can be made of metals such as copper, aluminum, iron or other alloys, which is fixed on the breaking unit housing 11 and has an extension section 121 and an external section 122 extending in the first direction D1. The external section 122 is located at the free end of the static contact conductive bar 12 and extends out of the breaking unit housing 11 and the trip unit housing 21 for external power supply. In addition, the extension section 121 and the external section 122 can be adjacent. When the electromagnetic trip device is connected to a circuit and the circuit is turned on, current flows through the static contact conductive bar 12.

[0032] The yoke 14 can be fixed on the disconnecting unit housing 11 adjacent to the extension section 121 of the static contact conductive bar 12, and combined with Figure 1 and Figure 3aAs shown, the yoke 14 may have a "U"-shaped structure, specifically, for example, may include a first section 141, a second section 142, and a connecting section 33 connecting the first section 141 and the second section 142, and the first section 141 and the second section 142 are opposite in the third direction D3. The opening of the "U"-shaped structure may face the armature 22 (described in detail later), and the extension section 121 may be arranged between the first section 141 and the second section 142, and in particular, the extension section 121 may be adjacent to the connecting section 33. This arrangement enables the yoke 2 to induce a magnetic field when current flows through the static contact conductive bar 12, and the magnetic field may act on the armature to achieve the function of causing the armature to move.

[0033] like Figure 1 As shown, the tripping member 13 can be, for example, a meniscus, which is configured to be triggered so as to enable the disconnecting unit 1 to complete a tripping action, for example via more transmission members (not shown), that is, to separate the moving contact and the stationary contact (not shown) in the disconnecting unit from each other, thereby electrically insulating the disconnecting unit 1.

[0034] Combination Figures 2a to 3a As shown, the armature 22 can be arranged to move in the second direction D2 relative to the trip unit housing 21 to switch between the first position and the second position. When the trip unit 2 is installed in the disconnecting unit 1, the armature 22 can be arranged on the side of the extension section 121 of the static contact conductive bar 12 away from the connection end 33, and the armature 22 can move toward or away from the extension section 121 in the second direction D2, wherein the position of the armature 22 farthest from the extension section 121 is the first position, and the position of the armature 22 closest to the extension section 121 is the second position. The armature 22 can be biased in the first position by the reset spring 25 (described in detail later), and when the current flowing through the static contact conductive bar 12 exceeds the threshold value (i.e., corresponding to the short circuit condition and / or the overload condition), the magnetic field induced by the yoke 2 can attract the armature 22 to move to the second position along the second direction D2 toward the extension section 121.

[0035] Further, the armature 22 can be arranged between the first section 141 and the second section 142 in the third direction D3, and in particular, the first position of the armature 22 can be arranged between the first section 141 and the second section 142, so that the structure of the electromagnetic tripping device is more compact, and the armature 22 is closer to the yoke 14, which will make the armature 22 subject to a greater magnetic force and move faster from the first position to the second position. In particular, the two mutually opposite surfaces of the first section 141 and the second section 142 are perpendicular to the third direction D3, and the two side surfaces of the armature 22 are also perpendicular to the third direction D3.

[0036] Combination Figures 2a to 3aAs shown, the pull rod 23 extends in the second direction D2 and can move in the second direction D1. The pull rod 23 has a first end 231 and a second end 232. The first end 231 is connected to the armature 22 by connection methods such as but not limited to threaded connection, welding, riveting, etc., so that the pull rod 23 can move together with the armature 22.

[0037] Combination Figures 2a to 3a As shown, the trigger member 24 can be pivotally mounted to the trip unit housing 21, and the trigger member 24 can cooperate with the second end 232 of the pull rod 23. The cooperation can be any cooperation that can be thought of by those skilled in the art, such as but not limited to keyway cooperation, hinged cooperation, cam slider cooperation, and the like. Figures 2a to 3a The insertion fit of the concave and convex parts shown in the figure makes the movement of the pull rod 23 in the second direction D2 cause the trigger member 24 to pivot. In particular, the movement of the extension section 121 of the pull rod 23 driven by the armature 22 in the second direction D2 toward the stationary contact conductive row 2 can cause the trigger member 24 to pivot in a specific pivot direction (in the Figure 3a The pivoting movement in the specific pivoting direction is toward the stripping member 13, so as to contact the stripping member 13 and trigger the movement of the stripping member 13 (for example, a meniscus), thereby triggering the disconnecting unit to complete the tripping action, that is, the disconnecting action of the moving contact and the static contact.

[0038] The above introduces the structure of each moving part involved in the magnetic tripping action and the coordination relationship between each moving part. When a short circuit current or overload occurs, the armature 22 is subjected to the electromagnetic magnetic force to overcome the bias force of the reset spring 25 to complete the tripping. By setting the static contact conductive bar 12, the tripping member 13 and the yoke 14 in the disconnecting unit 1, and setting the armature 22, the pull rod 23 and the trigger member 24 in the tripping unit 2, the modular setting of the electromagnetic tripping device is realized. Therefore, it is only necessary to install the tripping unit 2 to realize the installation of multiple components in the entire electromagnetic tripping device, and ensure that the relative positions meet the functional requirements, which greatly reduces the assembly process and prevents the unstable tripping caused by possible assembly misalignment.

[0039] Furthermore, combined with Figures 2a to 3a As shown, the trip unit may further include a reset spring 25, which may bias the armature 22 to the first position. For example, the reset spring 25 may have a pre-deformation to directly bias the armature 22 or indirectly bias the armature 4 to the first position via the pull rod 5, so as to ensure that the armature 4 remains in the first position when the current is lower than the threshold value. When the current is greater than the threshold value, the armature 22 can overcome the bias of the reset spring 25 and move to the second position, and can automatically reset after the movement process is completed. Preferably, the reset spring 6 is compressed and biased, which is conducive to saving space and making the structure more compact.

[0040] Further, the reset spring 25 is detachably mounted to the trip unit housing 21. In particular, the reset spring 25 is a torsion spring, which includes a circular ring segment and free ends at both ends of the circular ring segment. The circular ring segment is sleeved on the support column 27 of the trip unit 2. The support column 27 extends perpendicular to the second direction D2 and one end of which is a free end. Figure 2b As shown, the return spring 25 can be removed from the support column 27 to achieve convenient replacement.

[0041] Further, one end of the return spring 25 is connected to (eg, abuts against) the pull rod 23, such as Figure 2b and 3b The other end can be connected to the trip unit housing 21, for example, accommodated in the accommodating portion 26 of the trip unit housing 21. The trip unit housing 21 may include a plurality of accommodating portions 26, such as Figure 2a-3b As shown, a plurality of accommodating portions 26 are arranged, for example, along the second direction D2, and the other end of the reset spring 25 extends into one of the plurality of accommodating portions 26. Extending into different accommodating portions 26 can cause the reset spring 25 to have different degrees of pre-deformation. Thus, the resistance to be overcome by the magnetic tripping action can be adjusted for different models and different application scenarios, so that the electromagnetic tripping device can be used in a variety of scenarios and targeted adjustments make the tripping more stable and reliable to meet different needs.

[0042] Furthermore, the trip unit 2 may further include a guide groove 28 extending along the second direction D2, and in particular, for example, two guide grooves 28, such as Figure 2a The pull rod 23 includes a protrusion 233 extending into the guide groove 28, as shown in FIG. Figure 2b As shown ( Figure 2b In order to facilitate the display of the protrusion 233, a portion of the trip unit housing is cut away), so that the pull rod 23 can move along the guide groove 28 along the second direction D2.

[0043] When a short circuit current or overload occurs, the armature 22 is tripped by the electromagnetic force to overcome the biasing force of the reset spring 25. In order to ensure that the armature 22 is reliably attracted to the yoke 14, a certain gap needs to be set between the armature 22 and the yoke 14 in the third direction D3, which makes it very important to guide the armature 22 during movement and to correctly and accurately position it relative to the yoke 14 to avoid collision with the yoke 14 during movement, resulting in tripping failure.

[0044] To this end, the trip unit housing 21 may further include a guide portion 29, such as Figure 2a and Figure 2b As shown, the guide portion 29 may include two first surfaces 291 ( Figure 2b Only one is shown) and two second surfaces 292 ( Figure 2a and Figure 2b Only one is shown in the figure). The planes where the two first surfaces 291 are located are located between the planes where the two second surfaces 292 are located. Figure 3a and Figure 3b As shown. Thus, the armature 22 can move along the second direction D2 between the two opposite first surfaces 291, as shown in FIG. Figure 3b The two second surfaces 292 are located between the first section 141 and the second section 142 of the yoke 14, and the two second surfaces 292 abut against the first section 141 and the second section 142 of the yoke 14 along the third direction D3, respectively. Figure 3a and Figure 3b shown.

[0045] like Figure 3a and Figure 3b As shown in FIG. 1 , the distance between the first section 141 and the second section 142 of the yoke 14 is greater than the width of the armature 22. After the trip unit 2 is mounted on the disconnecting unit 1, the position of the yoke 14 in the third direction D3 is defined by the second surface 292, and the position of the armature 22 in the third direction D3 is defined by the first surface 291. The positions of the yoke 14 and the armature 22 in the third direction D3 are both defined by the guide portion 29, and the first surface 291 and the second surface 292 are spaced apart in the third direction D3 (at Figure 3b (It is difficult to show in the figure because the gap is too small, but it can be understood by those skilled in the art) that it can ensure that the yoke 14 and the armature 22 have a reliable gap in the third direction D3.

[0046] The present invention realizes reliable guidance of the armature 22 during movement by means of the matching relationship between the guide portion 29 of the trip unit 2 and the armature 22 and the yoke 14 respectively, and ensures that the armature 22 and the yoke 14 will not move and collide by means of the first surface 291 and the second surface 292 spaced apart in the third direction D3, thereby eliminating the need for high precision requirements for component processing and assembly, and having a simple structure, which is conducive to reducing costs.

[0047] Figure 4 Shown including Figure 2a and Figure 2b A schematic three-dimensional diagram of an electromagnetic tripping device of a tripping unit 2 in FIG. The electromagnetic tripping device may include a plurality of disconnecting units 1, for example, two (eg Figure 4 As shown), 3, 4, etc. A corresponding tripping unit 2 can be provided for each breaking unit 1.

[0048] Furthermore, the present disclosure also proposes another embodiment of a trip unit 2, such as Figure 5 As shown, that is, a plurality of sets of combinations including the armature 22, the pull rod 23, the return spring 25 and the trigger member 24, for example, Figure 5The two sets shown can also be three sets, four sets, etc. The structure and matching relationship of the armature 22, the pull rod 23, the return spring 25 and the trigger member 24 in each set are combined with the above Figure 2a-Figure 3b In particular, all trigger members 24 share a pivot axis and pivot synchronously, such as Figure 5 shown.

[0049] Figure 6 The electromagnetic tripping device comprises four breaking units 1, and each two adjacent breaking units 1 are provided with a Figure 5 The trip unit 2 is shown.

[0050] The present disclosure also provides an electrical device, such as a contactor or a circuit breaker, comprising the above-mentioned electromagnetic tripping device according to the present disclosure.

[0051] It should be understood that the above description is intended to illustrate rather than limit. For example, the above embodiments (and / or aspects thereof) can be used in combination with each other. In addition, without departing from the scope of the present disclosure, many modifications can be made to adapt specific situations or materials to the teachings of the present disclosure. The functions or performances of the various elements or modules described herein are only for illustration and are by no means restrictive, but are merely exemplary embodiments. After reading the above description, many other embodiments and modifications within the spirit and scope of the claims will be apparent to those skilled in the art. Therefore, the scope of the present disclosure should be determined with reference to the full scope of the equivalents given by the attached claims and these claims.

[0052] In the following claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

Claims

1. An electromagnetic tripping device, characterized in that: include A breaking unit, the breaking unit comprising: Disconnecting unit housing, The static contact conductive bar is fixed on the breaking unit housing and extends out of the breaking unit housing in a first direction. A tripping member configured to be triggered to cause the disconnecting unit to complete the tripping action, A trip unit, the trip unit comprising: Trip unit housing, a trigger member, the trigger member being mounted on the trip unit housing so as to be movable relative to the trip unit housing, Wherein, the trip unit is detachably mounted to the disconnecting unit as a whole, and when the trip unit is mounted to the disconnecting unit, when the current flowing through the static contact conductive row exceeds a threshold value, the trigger member moves relative to the trip unit housing to trigger the tripping member.

2. The electromagnetic tripping device according to claim 1, characterized in that: The trip unit also includes: The armature is configured to be movable between a first position and a second position in a second direction relative to the trip unit housing, A pull rod is arranged to extend in a second direction, the pull rod having a first end and a second end, the first end being connected to the armature to move together with the armature relative to the trip unit housing in the second direction, the second end of the pull rod being matched with the trigger member so that the movement of the pull rod from the first position toward the second position causes the trigger member to perform a pivotal movement, Wherein, when the trip unit is installed to the disconnecting unit, the second position is closer to the stationary contact conductive bar than the first position, the pivoting of the trigger member can trigger the tripping member, and when the current flowing through the stationary contact conductive bar exceeds a threshold value, the armature can move toward the stationary contact conductive bar along the second direction to the second position.

3. The electromagnetic tripping device according to claim 2, characterized in that: The stationary contact conductive bar is fixed on the breaking unit housing and has an extension section and an external connection section extending in a first direction, wherein the external connection section is located at a free end of the stationary contact conductive bar. The disconnecting unit also includes a yoke, which is fixed on the disconnecting unit housing adjacent to the extension section. When the tripping unit is installed to the disconnecting unit, the second direction is perpendicular to the first direction, and the external section extends out of the disconnecting unit housing and the tripping unit housing. When the current flowing through the static contact conductive row exceeds a threshold value, the yoke attracts the armature to move toward the extension section along the second direction to a second position.

4. The electromagnetic tripping device according to claim 3, characterized in that: The trip unit further comprises a reset spring, which is detachably mounted to the trip unit housing. The return spring biases the armature to the first position.

5. The electromagnetic tripping device according to claim 4, characterized in that: The return spring is a torsion spring, one end of which is connected to the pull rod. The trip unit housing comprises a plurality of accommodating parts, and the other end of the reset spring extends into one of the plurality of accommodating parts. Extending into different accommodating parts enables the reset spring to have different degrees of pre-deformation.

6. The electromagnetic tripping device according to claim 5, characterized in that: The tripping unit comprises a supporting column extending perpendicularly to the second direction, one end of the supporting column is a free end, and the annular section of the reset spring is sleeved on the supporting column.

7. The electromagnetic tripping device according to claim 3, characterized in that: The trip unit further includes a guide groove extending along the second direction, The pull rod includes a protrusion extending into the guide slot, so that the pull rod moves along the guide slot in a second direction.

8. The electromagnetic tripping device according to claim 3, characterized in that: The yoke includes a first section, a second section and a connecting section connecting the first section and the second section and has a "U"-shaped structure. The opening of the "U" shape faces the armature, and the extension section is arranged between the first section and the second section.

9. The electromagnetic tripping device according to claim 8, characterized in that: The trip unit housing also includes a guide portion, which includes two first surfaces that are perpendicular to the third direction and face each other, and two second surfaces that are perpendicular to the third direction and face away from each other, the planes where the two first surfaces are located are located between the planes where the two second surfaces are located, the third direction is perpendicular to the first direction and the second direction, the armature moves along the second direction between the two relative first surfaces, and the two second surfaces are located between the first section and the second section of the yoke and respectively abut against the first section and the second section of the yoke along the third direction.

10. The electromagnetic tripping device according to any one of claims 1 to 9, characterized in that: The electromagnetic tripping device comprises a plurality of breaking units.

11. The electromagnetic tripping device according to claim 10, characterized in that: The tripping unit comprises two sets of armatures, a pull rod, a reset spring and a trigger member, wherein all the trigger members share a pivot shaft and pivot synchronously.

12. An electrical device, characterized in that: include An electromagnetic tripping device according to any one of the preceding claims 1-11.

Images