Release

Abstract

The utility model discloses a release, and relates to the technical field of circuit breaker accessories. The utility model relates to an electromagnetic relay which comprises a shell, a base, a coil support, a magnet yoke, magnetic steel, an armature, an ejector rod, a metal supporting piece, an elastic piece, a first spring base and the like, the magnet yoke is U-shaped, the magnetic steel is arranged between two arms of the magnet yoke, a coil rack is sleeved on a first arm and wound with a coil, the armature is transversely arranged on the magnet yoke, and the ejector rod is linked with the armature. A second spring base and an abutting step are arranged at the upper end of the metal supporting piece, the elastic piece is connected with the two spring bases, and one end of the armature abuts against the step. The release can effectively improve the stability, prolong the service life, improve the release reliability and optimize the product performance, and has a good application prospect in the field of circuit breakers.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit breaker accessories, specifically a trip unit. Background Technology

[0002] A trip unit is a device mechanically connected to or integrated with a circuit breaker, used to release the holding mechanism and automatically disconnect the circuit breaker. In the field of electrical equipment, the stable performance of the trip unit is crucial for ensuring circuit safety.

[0003] Existing trip units have certain structural design flaws. Their elastic elements are directly connected at both ends to the first connecting hole on the armature and the second connecting hole on the metal support (as disclosed in application number 2018100928333). Because the armature and metal support are perpendicularly positioned, this connection method causes interference and twisting between the elastic element and the upper end of the metal support when under force. This interference not only affects the service life of the elastic element (such as a torsion spring) but also easily leads to the elastic element failing to reset, resulting in poor overall stability of the trip unit. For example, in actual use, when the trip unit operates frequently, the interference between the elastic element and the metal support will accelerate wear, reduce its elastic recovery ability, and may eventually lead to trip unit failure, failing to perform the circuit breaker's disconnection function normally, posing a potential risk to circuit safety. Therefore, it is necessary to improve the structure of the trip unit to enhance its stability and service life. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a tripping device.

[0005] The technical solution adopted by this utility model is as follows: a tripping device, including a housing, a base, and a coil bracket, a magnetic yoke, a magnet, an armature, a push rod, and a metal support member disposed within the housing. The magnetic yoke has a U-shaped structure and includes a first arm and a second arm. The magnet is disposed between the first arm and the second arm of the magnetic yoke. The coil bracket is fitted onto the first arm and a coil is wound on the coil bracket. The armature is horizontally disposed on the magnetic yoke. One end of the push rod contacts and engages with the armature, and the other end extends out of the housing. The device also includes an elastic element and a first spring base. The first spring base is fixed on the armature. The upper end of the metal support member is provided with a second spring base and an abutment step. One end of the elastic element is connected to the first spring base, and the other end is connected to the second spring base. One end of the armature abuts against the abutment step.

[0006] Furthermore, one side of the metal support extends a clamp for positioning the magnet, and both sides of the base are provided with raised steps for positioning the bottom of the magnet.

[0007] Furthermore, the second spring base is integrally formed with the metal support.

[0008] Furthermore, the metal support member has upwardly extending side baffles on both sides of one end abutting the step, and the side baffles on both sides and the abutting step form a receiving space for accommodating one end of the armature.

[0009] Furthermore, the end of the armature that abuts against the step extends to two protruding feet that abut against the step, and the top of the protruding feet has a slope.

[0010] Furthermore, two parallel fixing plates are provided at each of the two corners of the outer casing, and the fixing plates are provided with mounting holes.

[0011] Furthermore, there are two abutment steps, which correspond to the protruding feet, and a clearance groove is left between the two abutment steps to allow the elastic element to make way.

[0012] Furthermore, the first spring base has an "L" shaped structure, which includes a first base plate fixed to the armature and a first connecting end, and the second spring base includes a second base plate vertically connected to the metal support and a second connecting end inclined to the second base plate.

[0013] Furthermore, the inclination angle between the second base plate and the second connecting end is 100-135°.

[0014] Furthermore, the working end of the push rod connected to the armature has a spherical structure.

[0015] The beneficial effects of this utility model are:

[0016] 1. Improved Stability: By setting up dedicated first and second spring bases, the elastic element is connected to these two bases at both ends. During operation, the elastic element will not twist or interfere with the metal support frame. This ensures that all components can work stably and collaboratively during the trip unit's operation, and the overall structural stability will not be affected by abnormal stress on the elastic element. This guarantees reliable operation of the trip unit under various working conditions and effectively improves its stability.

[0017] 2. Extended Service Life: By avoiding interference between the elastic component and the metal support, unnecessary wear on the elastic component during operation is reduced. Over long-term use, the elastic component maintains good elasticity, significantly extending its fatigue life. This means the trip unit's maintenance cycle can be extended, reducing equipment maintenance costs and improving the reliability and durability of the entire circuit system.

[0018] 3. Improved Tripping Reliability: The stable structure and properly functioning elastic components ensure that the trip unit can respond accurately and promptly when the holding mechanism needs to be released to automatically disconnect the circuit breaker. Problems with the elastic components will not cause delays or failures in the tripping action, thus effectively improving the tripping reliability of the trip unit and providing stronger protection for circuit safety.

[0019] 4. Optimized Product Performance: The optimized overall structure significantly improves the performance of the trip unit, enabling it to better adapt to various complex working environments and circuit conditions. Whether under normal load or overload conditions, it can stably perform its function, enhancing the product's competitiveness and applicability.

[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0023] Figure 3 This is a schematic diagram showing the connection between the magnetic yoke, metal support, and armature.

[0024] Figure 4 This is a schematic diagram of the top rod structure.

[0025] Figure 5 This is a schematic diagram of the armature structure.

[0026] Figure 6 This is a schematic diagram showing the connection between the magnetic yoke and the metal support.

[0027] Figure 1-6 In the middle: 1. Outer shell; 2. Base; 3. Coil bracket; 4. Magnetic yoke; 5. Magnet; 6. Armature; 7. Top rod; 8. Metal support; 9. First arm; 10. Second arm; 11. Elastic element; 12. First spring base; 13. Second spring base; 14. Abutment step; 15. Clamping plate; 16. Raised step; 17. Side baffle; 18. Accommodation space; 19. Raised foot; 20. Inclined surface; 21. Fixing plate; 22. Mounting hole; 23. Relief groove; 24. First base plate; 25. First connecting end; 26. Second base plate; 27. Second connecting end; 28. Spherical structure. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] This utility model provides a tripping device.

[0031] In this embodiment, refer to Figure 1-6 The trip unit includes a housing 1, a base 2, and a coil support 3, a magnetic yoke 4, a magnet 5, an armature 6, a push rod 7, and a metal support 8 disposed within the housing. The magnetic yoke has a U-shaped structure and includes a first arm 9 and a second arm 10. The magnet 5 is disposed between the first arm 9 and the second arm 10. The coil support is fitted onto the first arm 9 and a coil is wound on the coil support. The armature is horizontally disposed on the magnetic yoke 4. One end of the push rod 7 is in contact with the armature and is linked, while the other end extends out of the housing. The unit also includes an elastic element 11 and a first spring base 12. The first spring base 12 is fixed to the armature. The upper end of the metal support is provided with a second spring base 13 and an abutment step 14. One end of the elastic element 11 is connected to the first spring base 12, and the other end is connected to the second spring base 13. One end of the armature abuts against the abutment step.

[0032] In the above technical solution, by setting a base for the first spring and a base for the second spring, and connecting the two ends of the elastic element through the two spring bases, the tension can cause the armature to tilt, thereby achieving more stable force transmission and action control, optimizing the overall function of the trip unit, and improving the reliability and accuracy of the tripping action.

[0033] By setting up dedicated first and second spring bases, the elastic element is connected to these two bases at both ends. During operation, the elastic element will not twist or interfere with the metal support frame. This ensures that all components can work stably and collaboratively during the trip unit's operation, and the overall structural stability will not be affected by abnormal forces on the elastic element. This guarantees reliable operation of the trip unit under various working conditions and effectively improves the stability of the trip unit.

[0034] The working principle of this application is as follows:

[0035] 1. Initial state:

[0036] When the trip unit is not triggered, the elastic element is in a stretched state, and its tension acts on the armature through the first spring base and the second spring base. Under the action of the magnetic yoke and the fixing frame, the magnet forms a stable magnetic field, which generates a certain attraction force on the armature. Under the action of the attraction force, the armature remains in its original position, and the push rod is also in its initial position.

[0037] 2. Triggering the tripping action:

[0038] When an abnormal situation such as overload or short circuit occurs in the circuit, causing a change in the current passing through the coil, the magnetic field strength generated by the coil will also change accordingly according to the principle of electromagnetic induction. This breaks the balance between the field attraction and the tension of the elastic element. Under the tension of the elastic element, the coil tilts up and passes through the casing. The movement of the push rod can trigger the relevant mechanism of the circuit breaker, causing the circuit breaker to perform the operation of disconnecting the circuit.

[0039] Specifically, one side of the metal support member 8 extends a clamping plate 15 for positioning the magnet, and both sides of the base are provided with raised steps 16 for positioning the bottom of the magnet.

[0040] In this embodiment, the clamp extending from one side of the metal support and the raised steps on both sides of the base work together to position the magnet from multiple directions. This design effectively prevents the magnet from shifting during operation, ensuring that the magnet is always in the optimal working position, thereby stabilizing the magnetic circuit and improving the consistency and stability of the trip unit's performance. At the same time, it eliminates the need for the existing fixing frame, reduces accessories, simplifies the structure, and lowers costs.

[0041] Specifically, the second spring base 13 is integrally formed with the metal support.

[0042] In this embodiment, the second spring base and the metal support are integrally formed, reducing the number of connection points between components and enhancing the overall integrity and stability of the structure. At the same time, the integral forming design simplifies the manufacturing process, reduces production costs, improves production efficiency, and facilitates mass production and quality control.

[0043] Specifically, the metal support 8 has upwardly extending side baffles 17 on both sides of one end abutting the step, and the side baffles 17 on both sides and the abutting step form a receiving space 18 for accommodating one end of the armature.

[0044] In this embodiment, the receiving space formed by the side baffle and the abutment step on the metal support provides a clear limit and receiving area for one end of the armature. This not only ensures the positional stability of the armature during operation and prevents excessive deviation, but also provides a certain degree of protection for the armature, reduces interference from external factors, and extends the service life of the armature.

[0045] Specifically, the armature 6 extends from one end that abuts against the step, and has two protruding feet 19 that abut against the step. The top of the protruding feet has a slope 20.

[0046] In this embodiment, the extended protrusion of the armature and its top bevel design help the armature interact more smoothly with the step during the release action, reducing jamming and improving the response speed and accuracy of the release action.

[0047] Specifically, two parallel fixing plates 21 are provided on each of the two corners of the outer shell 1, and the fixing plates 21 are provided with mounting holes 22.

[0048] In this embodiment, the parallel fixing plate and mounting holes provided at the corner of the outer casing 1 facilitate the installation and fixing of the trip unit and the circuit breaker.

[0049] Specifically, there are two abutment steps 14, which correspond to the protruding feet, and a clearance groove 23 is left between the two abutment steps to allow the elastic element to make way.

[0050] In this embodiment, the clearance groove 23 between the two abutting steps provides sufficient clearance space for the elastic element, preventing interference between the elastic element and other components during operation. Simultaneously, this design makes the overall structure of the trip unit more compact and rational, reducing space occupation and facilitating more efficient layout and functional integration within a limited space.

[0051] Specifically, the first spring base has an "L" shaped structure, which includes a first base plate 24 fixed to the armature and a first connecting end 25. The second spring base includes a second base plate 26 vertically connected to the metal support and a second connecting end 27 inclined to the second base plate 26.

[0052] In this embodiment, this structural design improves the connection stability between the spring base and other components, ensures that the elastic element can function stably during operation, reduces energy loss, and improves the working efficiency of the trip unit.

[0053] Specifically, the inclination angle between the second base plate and the second connecting end is 100-135°.

[0054] In this embodiment, the specific tilt angle range (100-135°) between the second base plate and the second connecting end allows the elastic element to be in a more reasonable stress state when connecting the two spring bases. Within this angle range, the elastic element can better adapt to the movement trajectory of the armature, achieving smoother force transmission and coordinated action, further improving the tripping performance and stability of the trip unit.

[0055] Specifically, the working end of the push rod connected to the armature is a spherical structure 28.

[0056] In this embodiment, the working end connecting the push rod and the armature adopts a spherical structure, which changes the traditional surface contact between the push rod and the armature into point contact or near-point contact during contact and linkage. Furthermore, the spherical structure allows the force applied by the push rod to the armature to be more evenly distributed around the contact point. This contact method significantly reduces the friction area between the two, thereby effectively reducing wear during frequent operation. Compared to planar contact, the spherical structure can better adapt to relative displacement at different angles during movement, reducing jamming caused by surface unevenness or minor deviations. This improves the smoothness and reliability of the linkage between the push rod and the armature, extends the service life of both the push rod and the armature, and ensures the accuracy and stability of the trip unit's operation during long-term use.

[0057] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A trip unit, comprising a housing, a base, and a coil support, a magnetic yoke, a magnet, an armature, a push rod, and a metal support disposed within the housing. The magnetic yoke has a U-shaped structure, including a first arm and a second arm. The magnet is disposed between the first and second arms of the magnetic yoke. The coil support is fitted onto the first arm, and a coil is wound on the coil support. The armature is horizontally disposed on the magnetic yoke. One end of the push rod contacts and engages with the armature, and the other end extends out of the housing. The unit is characterized in that: The metal support is provided with a second spring base and an abutting step at the upper end, and the elastic member is connected at one end with the first spring base and at the other end with the second spring base.

2. The trip unit of claim 1, wherein: The metal support is provided with a clamping plate at one side for positioning the magnetic steel, and the base is provided with a convex step at both sides for positioning the bottom of the magnetic steel.

3. The trip unit of claim 1, wherein: The second spring base is integrally formed with the metal support.

4. The trip unit of claim 1, wherein: The metal support is provided with upward extending side baffles at both sides of the end of the abutting step, and the side baffles and the abutting step form a containing space for containing one end of the armature.

5. The release according to claim 1 or 4, characterized in that: The end of the armature abutting against the abutting step is provided with two convex feet abutting against the abutting step, and the top of the convex feet is provided with an inclined surface.

6. The trip unit of claim 1, wherein: Two fixing plates are arranged in parallel on each of the two corners of the shell, and the fixing plates are provided with mounting holes.

7. The trip unit of claim 1, wherein: The abutting step is two and corresponds to the convex feet, and a giving slot is left between the two abutting steps for the elastic member.

8. The trip unit of claim 1, wherein: The first spring base is in "L" shape structure, which includes a first bottom plate fixed with the armature and a first connecting end, and the second spring base includes a second bottom plate connected perpendicularly with the metal support and a second connecting end arranged obliquely with the second bottom plate.

9. The trip unit of claim 1, wherein: The oblique angle between the second bottom plate and the second connecting end is 100-135°.

10. The trip unit of claim 1, wherein: The acting end of the top rod connected with the armature is in spherical surface structure.

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