Operating mechanism, breaking unit and electric device
By designing an operating mechanism including a housing, a moving component, a biasing piece, an actuating device, a balance bar and a counterweight in an electromagnetic release, the problem of anti-vibration capability when the tripping current threshold is low in the prior art is solved. It solves the problem of deficiencies, achieves higher resistance to shock and vibration, and reduces the occurrence of false tripping.
Patent Information
- Application Number
- CN202420033747.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-05
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-01-05
AI Technical Summary
When the trip current threshold of existing electromagnetic trips is low, their vibration resistance is insufficient, and they are prone to accidental tripping due to vibration, resulting in production, life and economic losses.
An operating mechanism is designed, including a housing, a moving assembly, a biasing member, an actuating device, a balance bar and a counterweight. Through the lever structure of the balance bar and counterweight, the inertial force generated by the vibration of the moving components is offset and the anti-vibration capability is improved.
It achieves a low tripping current threshold while maintaining strong resistance to shock and vibration, reducing the occurrence of false tripping and improving the reliability and safety of the equipment.
Smart Images
Figure CN222380528U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the electrical field, and in particular to an operating mechanism, a disconnecting unit including the operating mechanism, and an electrical device. Background Art
[0002] The electromagnetic release is a short-circuit protection device that disconnects the circuit through the electromagnetic release mechanism when a short circuit occurs in the circuit. After closing the switch, a normally working switch needs to be able to withstand certain impacts and vibrations so that it will not trip and cause line interruption. In some applications, the circuit breaker requires a low trip current threshold. In this way, when the electromagnet suction force is constant, it is necessary to reduce the reaction force of the reset spring. As a result, the ability of the electromagnetic release mechanism to resist vibration and impact may be reduced.
[0003] When the magnetic spring force is small, the vibration applied along the armature movement direction may cause the release to trip. This false tripping has a great impact on production and life and causes economic losses. It can be seen that the release of the prior art has the defect of poor vibration resistance when the tripping threshold is low.
[0004] The present technology provides a magnetic release which can have a lower tripping current threshold but at the same time has a strong ability to resist shock and vibration. 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 operating mechanism, including a housing; a moving assembly, which can be installed relative to the housing in a first direction to switch between a first position and a second position; a biasing member, which biases the moving assembly in the first position; and an actuating device, which can apply an actuating force along the first direction to the moving assembly. The operating mechanism also includes a balance bar, which can be pivotally installed to the housing in a plane parallel to the first direction, and the balance bar is divided into a first section and a second section by its own pivot center. The moving assembly is connected to the first connection point of the first section, so that the linear movement of the moving assembly can drive the balance bar to pivot; a counterweight block is fixed to the second connection point of the second section of the balance bar; the actuating device can overcome the biasing force of the biasing member and the obstruction caused by the mass of the counterweight block to actuate the moving assembly, so that the moving assembly moves from the first position to the second position along the first direction.
[0006] According to any embodiment of the present disclosure, the first direction is a vertical direction.
[0007] According to any embodiment of the present disclosure, the structure of the balance pole and the mass of the counterweight are configured to reduce the acceleration of the moving component caused by vibration when the operating mechanism is vibrated, so as to hinder the moving component from moving from the first position to the second position.
[0008] According to any embodiment of the present disclosure, it is satisfied that L1*M1+l1*m1≥L2*M2+l2*m2, wherein LI is the distance from the first connection point to the pivot center, L2 is the distance from the second connection point to the pivot center, M1 is the mass of the motion assembly, M2 is the mass of the counterweight, m1 is the mass of the first section, m2 is the mass of the second section, l1 is the distance from the center of mass of the first section to the pivot center, and l2 is the distance from the center of mass of the second section to the pivot center.
[0009] According to any one of the embodiments of the present disclosure, the balancing pole is a pole of uniform mass, and the length of the first section is equal to the length of the second section.
[0010] According to any one of the embodiments of the present disclosure, an elongated receiving hole with an extending direction consistent with that of the balance pole is provided on the first section of the balance pole, and the motion assembly has a protrusion disposed in the receiving hole.
[0011] The present disclosure also proposes a disconnecting unit, comprising a moving contact, a stationary contact and an operating mechanism according to any one of the embodiments of the present disclosure, wherein when the moving component is located at a first position, the moving contact and the stationary contact are closed, and when the moving component moves from the first position to the second position, the moving contact and the stationary contact are disconnected.
[0012] According to any one of the embodiments of the present disclosure, when the current in the breaking unit is greater than a threshold value, the actuating device actuates the moving component to move from the first position to the second position.
[0013] According to any one of the embodiments of the present disclosure, the actuating device is a yoke, and the moving assembly includes an armature opposite to the yoke.
[0014] The present disclosure also provides an electrical device, comprising a disconnecting unit according to any one of the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A three-dimensional schematic diagram showing an operating mechanism according to an embodiment of the present disclosure;
[0016] Figure 2 Show according to Figure 1 A plan view of the operating mechanism;
[0017] Figure 3 Shown in Figure 2 A schematic diagram showing the distance marks in the operating mechanism;
[0018] Figure 4 A perspective schematic diagram of an electrical device including an operating mechanism according to the present disclosure is shown.
[0019] Reference numerals
[0020] 1 housing,
[0021] 2 motion component, 21 armature, 22 protrusion
[0022] 3 biasing pieces,
[0023] 4 Actuating device,
[0024] 5 balance pole, 51 first section, 511 receiving hole, 52 second section, 521 second connection point, 6 counterweight block,
[0025] 7 disconnect units,
[0026] 8 Electrical installation
[0027] D1 first direction,
[0028] P pivot center, P1 first connection point, P2 second connection point, P3 center of mass of first section, P4 center of mass of first section,
[0029] LI is the distance from the first connection point to the pivot center, L2 is the distance from the second connection point to the pivot center, l1 is the distance from the center of mass of the first segment to the pivot center, l2 is the distance from the center of mass of the second segment to the pivot center DETAILED DESCRIPTION
[0030] 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.
[0031] 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.
[0032] In the present disclosure, for the convenience of description, the moving direction of the moving component 2 relative to the housing 1 is designated as the first direction D1. Figure 1 shown.
[0033] like Figure 1As shown, the operating mechanism according to the present disclosure includes a housing 1, a moving assembly 2, a biasing member 3, and an actuating device 4. The moving assembly 2 can be mounted on the housing 1 in a first direction D1 to move between a first position and a second position, wherein the first position is as shown in FIG. Figure 1 As shown, the moving assembly 2 is closer to the actuating device 4 described below in the second position than in the first position. When the moving assembly 2 moves from the first position to the second position, the operating mechanism can trigger the disconnecting unit 7 (described later, such as Figure 2 The breaking operation described above.
[0034] The operating mechanism according to the present disclosure includes a biasing member 3, such as Figure 1 The spring shown has one end connected to a portion of the moving assembly and the other end fixed to a portion of the housing (eg, a length adjustment member of the spring) to bias the moving assembly 2 in the first position.
[0035] The actuating device 4 may be, for example, a yoke, which may be, for example, U-shaped, such as Figure 1 As shown, the U-shaped actuator 4 may enclose a conductive component (e.g., a static contact conductive row), so that when a current passes through the conductive component, the actuator 4 generates a magnetic field. A portion of the moving component 2, such as a portion close to the actuator 4, may be an armature opposite to the actuator 4, which is attracted toward the actuator 4 due to the magnetic field generated by the actuator 4. When the current in the conductive component reaches a threshold value, the attraction to the actuator 4 is large enough to overcome the biasing member 3, so that the moving component 2 moves from the first position to the second position, thereby causing the breaking unit 7 to perform a breaking operation.
[0036] Therefore, the allowable current threshold of the operating mechanism can be adjusted to a desired value by setting the biasing force of the biasing member 3. However, when the biasing force is small, vibration may cause the moving component 2 of the operating mechanism to have an undesirable erroneous movement, that is, the moving component 2 moves to the second position when the current does not reach the threshold. Therefore, it is necessary to improve the anti-vibration capability of the operating mechanism.
[0037] Therefore, the operating mechanism according to the present disclosure further includes a balancing bar 5 and a counterweight 6 to enhance the anti-vibration capability. Specifically, the balancing bar 5 can be pivotally mounted to the housing 1 in a plane parallel to the first direction D1. Figure 1 The balance bar 5 is pivoted by its own pivot center P (as shown in FIG. Figure 3 The moving assembly 2 is connected to the first connecting point P1 of the first segment 51 (as shown in FIG. Figure 3 As shown), the configuration block is fixed to the second connection point P2 of the second section 52 (as shown Figure 3 shown).
[0038] The motion assembly 2 is connected to the balance pole 5 so that the linear motion of the motion assembly 2 along the first direction D1 can drive the balance pole 5 to pivot. Figure 2 As shown, the first section 51 of the balance pole 5 is provided with an elongated receiving hole 511 extending in the same direction as the balance pole 5, and the motion component 2 has a protrusion disposed in the receiving hole 511 to achieve the connection. In addition, the receiving hole can also be provided on the motion component 2, and the protrusion can be provided on the balance pole 5, or other connection methods capable of achieving the same function are also applicable to the present disclosure.
[0039] When the current of the operating mechanism according to the present disclosure reaches a threshold value, the actuating device 4 can overcome the biasing force of the biasing member 3 and the obstruction caused by the mass of the counterweight 6 to actuate the moving assembly 2, so that the moving assembly can move from the first position to the second position along the first direction D1. The obstruction caused by the mass of the counterweight 6 may be, for example, the gravity of the counterweight 6 and / or the inertia of the counterweight 6. According to the operating mechanism of the present disclosure, due to the lever structure of the balance bar 5 and the arrangement of the counterweight 6, at least part of the inertia of the moving assembly 2 caused by vibration can be offset, and the inertia may cause the moving assembly 2 to overcome the biasing force of the biasing member 3 and move to the second position.
[0040] Now, it is explained why the structure of the operating mechanism according to the present disclosure has enhanced anti-vibration capability. Vibrations in various directions cause the operating mechanism to have accelerations generated by vibrations, which can be decomposed into a component along the first direction D1 and a component perpendicular to the first direction D1. The component perpendicular to the first direction D1 hardly affects the movement of the moving component. As for the component along the first direction D1, for example, analyzing the moving component 2 in the first position, the counterweight 6 and the moving component 6 have accelerations of the same direction and magnitude, and thus have inertial forces of the same direction, but generate opposite torques on the pivot center P, thereby, the counterweight 6 can offset at least a portion of the effect of the acceleration on the moving component 6, that is, can offset at least a portion of the effect of the vibration on the moving component 6.
[0041] In addition, the first direction D1 can be any direction, which is determined by the installation direction, application scenario or use requirements of the operating mechanism, but according to the above analysis and explanation, each direction has the effect of enhancing vibration resistance. Preferably, the first direction D1 can be non-perpendicular to the vertical direction, especially the first direction D1 is the vertical direction, so that the counterweight 6 can also reduce the influence of the gravity on the operating mechanism 5 itself, and the principle is similar to the above and will not be expanded.
[0042] Furthermore, the operating mechanism may satisfy L1*M1+l1*m1≥L2*M2+l2*m2, where Figure 3As shown, LI is the distance from the first connection point P1 to the pivot center P, L2 is the distance from the second connection point P2 to the pivot center P, M1 is the mass of the motion component 2, M2 is the mass of the counterweight 6, m1 is the mass of the first section 51, m2 is the mass of the second section 52, l1 is the distance from the center of mass P3 of the first section to the pivot center P, and l2 is the distance from the center of mass P4 of the second section to the pivot center P. This ensures that the mass of the balance bar 5 and the counterweight 6 will not in turn become an obstacle to the movement of the motion component 2 from the first position to the second position. When L1*M1+l1*m1 is approximately equal to L2*M2+l2*m2, the counterweight 6 can basically offset the vibration and gravity of the motion component 2, and the actuator 4 only needs to overcome the biasing force of the biasing member to actuate the motion component 2, which is convenient for setting the current threshold.
[0043] Furthermore, the balancing pole 5 can be a pole of uniform mass, and the length of the first section 51 is equal to the length of the second section 52, thereby basically satisfying l1*m1=l2*m2, and the influence of the mass of the balancing pole 5 itself can be basically ignored, which is convenient for the design and configuration of the mass of the counterweight. Preferably, the distance from the first connection point P1 to the pivot center P can be equal to the distance from the second connection point P2 to the pivot center P, that is, L1=L2. Thus, the design and configuration of the mass of the counterweight is further facilitated.
[0044] Figure 4 A three-dimensional schematic diagram of an electrical device including an operating mechanism according to the present disclosure is shown. As shown in the figure, the electrical device 8 according to the present disclosure may include two disconnecting units 7, and each disconnecting unit 7 may include a moving contact (not shown), a stationary contact (not shown) and an operating mechanism according to the present disclosure. When the moving component 2 of the operating mechanism is in the first position, the moving contact and the stationary contact are closed, and when the moving component 2 moves from the first position to the second position, the moving contact and the stationary contact are disconnected. In addition, when the current in the disconnecting unit 7 is greater than the threshold value, the actuator 4 actuates the moving component 2 to move from the first position to the second position to complete the disconnecting operation. The electrical device 8 according to the present disclosure may also include one, three, and four equal numbers of disconnecting units 7 to meet different application requirements.
[0045] 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.
[0046] 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 operating mechanism, comprising case, a moving assembly capable of being mounted relative to the housing so as to be movable in a first direction to switch between a first position and a second position, a biasing member, biasing the moving assembly to a first position, an actuating device capable of applying an actuating force along a first direction to the moving component, It is characterized in that The operating mechanism also includes a balancing pole, the balancing pole being pivotally mounted to the housing in a plane parallel to the first direction, the balancing pole being divided into a first section and a second section by its own pivot center, the motion assembly being connected to a first connection point of the first section, so that the linear motion of the motion assembly can drive the balancing pole to perform a pivotal motion, A counterweight is fixed to the second connection point of the second section of the balance pole.
2. The operating mechanism according to claim 1, characterized in that: The first direction is the vertical direction.
3. The operating mechanism according to claim 1, characterized in that: The balance bar and the counterweight are configured to reduce the acceleration of the moving component caused by vibration when the operating mechanism is vibrated, so as to hinder the moving component from moving from the first position to the second position.
4. The operating mechanism according to claim 3, characterized in that: Satisfies, L1*M1+l1*m1≥L2*M2+l2*m2, where LI is the distance from the first connection point to the pivot center, L2 is the distance from the second connection point to the pivot center, M1 is the mass of the moving component, M2 is the mass of the counterweight, m1 is the mass of the first section, m2 is the mass of the second section, l1 is the distance from the center of mass of the first section to the pivot center, and l2 is the distance from the center of mass of the second section to the pivot center.
5. The operating mechanism according to claim 4, characterized in that: The balancing rod is a rod with uniform mass, and the length of the first section is equal to the length of the second section.
6. The operating mechanism according to claim 1, characterized in that: The first section of the balance pole is provided with an elongated receiving hole whose extending direction is consistent with that of the balance pole, and the moving assembly has a protrusion arranged in the receiving hole.
7. A breaking unit, characterized in that: It comprises a moving contact, a stationary contact and an operating mechanism according to any one of claims 1 to 6, wherein when the moving component is located at a first position, the moving contact and the stationary contact are closed, and when the moving component moves from the first position to the second position, the moving contact and the stationary contact are disconnected.
8. The breaking unit according to claim 7, characterized in that: When the current in the breaking unit is greater than a threshold value, the actuating device actuates the moving component to move from the first position to the second position.
9. The breaking unit according to claim 8, characterized in that The actuating device is a yoke, and the moving assembly includes an armature opposite to the yoke.
10. An electrical device, characterized in that: Comprising a breaking unit according to any one of claims 7-9.