Tripping assembly and circuit breaker

Abstract

The embodiment of the utility model provides a tripping assembly and a circuit breaker. The tripping assembly comprises an electromagnetic tripper, the electromagnetic tripper comprises a first tripping piece, and the first tripping piece can rotate to be switched between a switching-on position and a switching-off position; the thermomagnetic release comprises a second release piece and a rotating piece, the rotating piece can be matched with the first release piece and the second release piece, and the second release piece can rotate so as to be switched between the state of locking the rotating piece and the state of unlocking the rotating piece. Wherein under the condition that the second tripping piece unlocks the rotating piece, the rotating piece can drive the first tripping piece to be switched from the closing position to the opening position.

Description

Technical Field

[0001] The embodiments disclosed herein relate generally to the field of electrical equipment technology, and more specifically to tripping assemblies and circuit breakers. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and can close, carry, and interrupt current under abnormal circuit conditions within a specified time.

[0003] Conventional circuit breakers need to have a fast tripping mechanism, meaning that when the current exceeds a set threshold, the magnetic field generated by the electromagnetic coil will quickly attract the tripping mechanism, thereby rapidly cutting off the circuit to quickly respond to short-circuit situations. However, circuit breakers also need to be equipped with a thermal-magnetic tripping mechanism to achieve comprehensive protection functions against short circuits and overloads. Utility Model Content

[0004] The purpose of this disclosure is to provide a tripping assembly and circuit breaker that at least partially solves the above-mentioned problems.

[0005] In a first aspect of this disclosure, a tripping assembly is provided, comprising an electromagnetic trip unit including a first trip member rotatable to switch between a closed position and an open position; and a thermomagnetic trip unit including a second trip member and a rotating member, the rotating member cooperating with the first trip member and the second trip member, the second trip member being rotatable to switch between a locked state and an unlocked state, wherein when the second trip member unlocks the rotating member, the rotating member can drive the first trip member to switch from the closed position to the open position.

[0006] According to embodiments of this disclosure, when the circuit operates under overload conditions for an extended period, triggering thermal-magnetic protection, the second tripping element rotates counterclockwise and releases the locking rotating element. The rotating element then drives the first tripping element to switch from the closed position to the open position. Since the first tripping element can switch to the open position, the circuit breaker according to embodiments of this disclosure combines a fast tripping mechanism with a thermal-magnetic tripping mechanism to achieve comprehensive protection against short circuits and overloads.

[0007] In some embodiments, the rotating member includes a first main body portion and a driving portion disposed on the first main body portion, the first tripping member includes a second main body portion and a first engaging portion disposed on the second main body portion adjacent to the second tripping member, and the first engaging portion is located on the rotation path of the driving portion.

[0008] In some embodiments, when the rotating member is locked and the first tripping member is in the closed position, the driving part is spaced apart from the first mating part.

[0009] In some embodiments, the first tripping member further includes a pair of second mating portions disposed adjacent to the second tripping member on the second body portion, wherein the pair of second mating portions are spaced apart from the first mating portion along the axial direction of the second body portion.

[0010] In some embodiments, the first tripping member further includes a third mating portion disposed on the second main body portion away from the second tripping member, and the tripping assembly further includes a locking member located on the rotation path of the third mating portion and capable of locking the operating handle, wherein during the process of the first tripping member switching from the closed position to the open position, the third mating portion drives the locking member to act to release the locking of the operating handle.

[0011] In some embodiments, the first release member includes a fourth mating portion disposed on the second main body portion away from the second release member. The fourth mating portion includes a blocking surface away from the second main body portion. The blocking surface can cooperate with the operating handle to make the first release member rotate under the push of the operating handle.

[0012] In some embodiments, along the axial direction of the second main body portion, the fourth mating portion is spaced apart from the third mating portion, or the fourth mating portion is connected to the third mating portion.

[0013] In some embodiments, the second release member includes a third body portion and a locking portion disposed on the third body portion, wherein one end of the locking portion opposite to the third body portion is bent toward the direction adjacent to the rotating member and abuts against the rotating member to lock the rotating member.

[0014] In some embodiments, the rotating member further includes a protrusion disposed on the first main body portion, and one end of the locking portion opposite to the third main body portion abuts against the outer surface of the protrusion portion and prevents the protrusion portion from rotating.

[0015] In a second aspect of this disclosure, a circuit breaker is provided, comprising: any of the tripping components according to a first aspect of this disclosure.

[0016] It should be understood that the description in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0017] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0018] Figure 1 A partial structural schematic diagram of a circuit breaker according to some embodiments of the present disclosure is shown;

[0019] Figure 2 A partial structural schematic diagram of an electromagnetic trip unit and a thermomagnetic trip unit according to some embodiments of the present disclosure is shown;

[0020] Figure 3 It shows Figure 2 The electromagnetic trip unit and the thermomagnetic trip unit shown are partial structural schematic diagrams from another perspective.

[0021] Figures 4 to 7 A schematic diagram of the operation of a circuit breaker according to some embodiments of the present disclosure is shown.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100 is the tripping assembly; 200 is the operating handle;

[0024] 1 is an electromagnetic trip unit, 11 is a first tripping component, 111 is a second main body part, 112 is a first mating part, 113 is a second mating part, 114 is a third mating part, 115 is a fourth mating part, 1151 is a blocking surface, 12 is a moving component, and 121 is a limiting hole.

[0025] 2 is a thermomagnetic trip unit, 21 is a second tripping component, 211 is a third main body part, 212 is a locking part, 22 is a rotating component, 221 is a first main body part, 222 is a driving part, and 223 is a protrusion part;

[0026] 3 is a locking component;

[0027] 41 is the first torsion spring, and 42 is the elastic element;

[0028] 51 is the first pin, 52 is the second pin, and 53 is the third pin;

[0029] X is the axial direction of the second main body. Detailed Implementation

[0030] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0031] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.

[0032] As described above, conventional circuit breakers require a fast tripping mechanism, meaning that when the current exceeds a set threshold, the magnetic field generated by the electromagnetic coil quickly attracts the tripping mechanism, thereby rapidly disconnecting the circuit to quickly respond to short-circuit conditions. However, circuit breakers also need to be equipped with a thermomagnetic tripping mechanism to achieve comprehensive protection against short circuits and overloads. Embodiments of this disclosure provide a tripping assembly 100 and a circuit breaker to at least partially solve the above-mentioned problems. In the following sections, [further details will be provided]. Figures 1 to 7 The principles of this disclosure are described.

[0033] Figure 1 A partial structural schematic diagram of a circuit breaker according to some embodiments of the present disclosure is shown. Figure 2 A partial structural schematic diagram of an electromagnetic trip unit 1 and a thermomagnetic trip unit 2 according to some embodiments of the present disclosure is shown. Figure 3 It shows Figure 2 The electromagnetic trip unit 1 and the thermomagnetic trip unit 2 are shown as a partial structural schematic diagram from another perspective. (See attached diagram.) Figures 1 to 3 As shown, the tripping assembly 100 described herein generally includes an electromagnetic tripping unit 1, a thermomagnetic tripping unit 2, and a locking element 3.

[0034] refer to Figures 1 to 3 In some embodiments, the electromagnetic trip unit 1 may include a first tripping element 11 and a pair of movable elements 12. The first tripping element 11 may be rotatably mounted on the housing or a bracket via a first pin 51. The thermomagnetic trip unit 2 may include a second tripping element 21 and a rotating element 22. The second tripping element 21 may be rotatably mounted on the housing or a bracket via a second pin 52. Similarly, the rotating element 22 may be rotatably mounted on the housing or a bracket via a third pin 53, and the rotating element 22 may be located between the first tripping element 11 and the second tripping element 21. It should be understood that in other embodiments, the first tripping element 11, the second tripping element 21, and the rotating element 22 may also be rotatably mounted on any other suitable internal structure within the circuit breaker.

[0035] Continue to refer to Figures 1 to 3Furthermore, the first tripping member 11 can switch between the closed and open positions during rotation. The first tripping member 11 may include a second main body 111 and a pair of second mating parts 113 disposed adjacent to the second tripping member 21 on the second main body 111. Each of the pair of moving members 12 may include a limiting hole 121, and the pair of second mating parts 113 are each located within the corresponding limiting hole 121. Thus, when the pair of moving members 12 move downward, the first tripping member 11 can rotate counterclockwise around the first pin 51 to switch from the closed position to the open position.

[0036] Continue to refer to Figures 1 to 3 As shown, in some embodiments, the first tripping member 11 may further include a third mating part 114 disposed on the second main body 111 opposite to the second tripping member 21. The locking member 3 may be located on the rotation path of the third mating part 114 and be able to lock the operating handle 200. Thus, during the process of the first tripping member 11 switching from the closed position to the open position, the third mating part 114 can drive the locking member 3 to release the locking of the operating handle 200.

[0037] Figures 4 to 7 A schematic diagram of the operation of a circuit breaker according to some embodiments of the present disclosure is shown. Figure 4 The circuit breaker shown is in the closed but not tripped state. Figure 5 The circuit breaker shown is in a state of rapid tripping, in which the locking element 3 is activated, but the operating handle 200 is not activated and is in the closed position. Figure 6 The circuit breaker shown is in a state during the thermal-magnetic tripping process, in which the locking element 3 is activated, but the operating handle 200 is not activated and is in the closed position. Figure 7 The circuit breaker shown is in the reset process.

[0038] Figure 4 and Figure 5 The rapid tripping process of the circuit breaker is shown. For example... Figures 4 to 5 As shown, when the current exceeds a set threshold, the magnetic field generated by the electromagnetic coil causes the moving member 12 to move downwards. Through the engagement between the wall of the limiting hole 121 and the second mating part 113, the moving member 12 can drive the first tripping member 11 to rotate counterclockwise, thereby switching the first tripping member 11 from the closed position to the open position. During the switching process, the first tripping member 11 drives the locking member 3 to operate through the third mating part 114. After the locking member 3 operates, it can release the locking operation handle 200 to achieve rapid tripping, thereby quickly cutting off the circuit and responding quickly to short circuit situations.

[0039] Continue to refer to Figures 1 to 3In some embodiments, the rotating member 22 can cooperate with both the first tripping member 11 and the second tripping member 21. The second tripping member 21 can rotate to switch between a locked state and an unlocked state of the rotating member 22. Thus, when the second tripping member 21 locks the rotating member 22, the rotating member 22 cannot rotate, and the elastic member 42 is compressed. When the second tripping member 21 unlocks the rotating member 22, since one end of the elastic member 42 abuts against the rotating member 22 and the other end abuts against the housing or bracket, the elastic member 42 can release energy and drive the rotating member 22 to rotate clockwise. The rotating member 22 then drives the first tripping member 11 to switch from the closed position to the open position. The process of the second tripping member 21 locking and unlocking the rotating member 22 will be described in detail below. Figures 1 to 3 To describe.

[0040] Figure 4 and Figure 6 The thermal-magnetic tripping process of the circuit breaker is shown. For example... Figure 2 , Figure 4 and Figure 6 As shown, when the circuit operates under overload conditions for an extended period, triggering thermal-magnetic protection, the second tripping member 21 rotates counterclockwise and releases the locking member 22. The rotating member 22 rotates clockwise under the action of the elastic member 42, driving the first tripping member 11 to switch from the closed position to the open position. During the switching process, the first tripping member 11 drives the locking member 3 to operate via the third mating part 114. The locking member 3 releases the locking handle 200, thereby achieving thermal-magnetic tripping and cutting off the circuit. Because the first tripping member can switch to the open position, the circuit breaker according to this embodiment combines a fast tripping mechanism and a thermal-magnetic tripping mechanism to achieve comprehensive protection functions during short circuits and overloads.

[0041] Furthermore, in this embodiment, the rotating member 22 does not need to push the first tripping member 11 through the tripping rod, but directly pushes the first tripping member 11 to trip, thus avoiding the problem that the rotating member 22 cannot push the tripping rod due to a large elastic force applied to it, thereby avoiding the problem of failure to thermally and magnetically trip. In addition, the electromagnetic tripping unit 1 and the thermally and magnetically tripping unit 2 in the circuit breaker according to this embodiment can be manufactured and tested separately, and the thermally and magnetically tripping unit 2 can reuse existing production lines and magnetic and thermal adjustment, which is beneficial to saving fixed investment.

[0042] It should be noted that during the rapid tripping process, the electromagnetic trip unit 1 actuates while the thermal-magnetic trip unit 2 does not participate in the actuation. Furthermore, during the electromagnetic tripping process, the thermal-magnetic trip unit 2 actuates, and as... Figure 4 and Figure 6As shown, the paired second mating parts 113 of the first tripping member 11 move within the limiting hole 121 of the moving member 12, but the moving member 12 is not driven. Therefore, the electromagnetic tripping device 1 and the thermomagnetic tripping device 2 in the tripping assembly 100 according to the embodiment of this disclosure do not interfere with each other when they are working, which is beneficial to improving the stability of the circuit breaker during operation.

[0043] Continue to refer to Figures 1 to 3 In some embodiments, the rotating member 22 may include a first main body 221 and a drive portion 222 disposed on the first main body 221. The first tripping member 11 may also include a first mating portion 112 disposed on the second main body 111 adjacent to the second tripping member 21. The first mating portion 112 may be located on the rotation path of the drive portion 222. Thus, when the second tripping member 21 releases the rotating member 22, the rotating member 22 drives the first tripping member 11 from the closed position to the open position through the interaction between the drive portion 222 and the first mating portion 112, so as to continue the subsequent tripping process. In addition, an additional drive portion 222 is provided on the first main body 221 to cooperate with the first mating portion 112, which requires minimal modification of parts and helps to reduce development costs.

[0044] refer to Figure 2 It should be noted that, since the first mating part 112 and the paired second mating parts 113 are both located adjacent to the second tripping member 21 on the second main body part 111, in order to avoid the first mating part 112 and the paired second mating parts 113 interfering with each other and affecting the operation of the circuit breaker, based on the tubular structure of the second main body part 111, the paired second mating parts 113 can be spaced apart from the first mating part 112 along the axial direction X of the second main body part 111.

[0045] refer to Figure 3 Furthermore, when the rotating member 22 is locked and the first tripping member 11 is in the closed position, the drive unit 222 can be spaced apart from the first mating part 112. It can be understood that the existence of the gap effectively avoids circuit breaker malfunction.

[0046] refer to Figures 1 to 3To enable the second release member 21 to lock or unlock the rotating member 22, in some embodiments, the second release member 21 may include a third body portion 211 and a locking portion 212 disposed on the third body portion 211. The locking portion 212 can be used to lock or unlock the rotating member 22. For example, the end of the locking portion 212 facing away from the third body portion 211 may be bent toward the adjacent rotating member 22, and the end of the locking portion 212 facing away from the third body portion 211 may abut against the rotating member 22 to lock the rotating member 22 through a hook-like structure. Thus, when the locking portion 212 abuts against the rotating member 22, the locking portion 212 can lock the rotating member 22; and when the locking portion 212 separates from the rotating member 22, the locking portion 212 can unlock the rotating member 22. It should be understood that in other embodiments, the second release member 21 may employ any other suitable structure to lock or unlock the rotating member 22.

[0047] Continue to refer to Figures 1 to 3 In order to cooperate with the locking part 212, in some embodiments, the rotating member 22 may further include a protrusion 223 provided on the first main body part 221. The end of the locking part 212 facing away from the third main body part 211 may abut against the outer surface of the protrusion 223 to prevent the protrusion 223 from rotating, thereby locking the rotating member 22. It should be understood that in other embodiments, the rotating member 22 may adopt any other suitable structure to cooperate with the locking part 212, such as a groove, etc., and there is no limitation herein.

[0048] Continue to refer to Figures 1 to 3 In some embodiments, the first tripping member 11 may further include a fourth mating portion 115 disposed on the second main body 111 opposite to the second tripping member 21. The fourth mating portion 115 may include a blocking surface 1151 opposite to the second main body 111. The blocking surface 1151 can cooperate with the operating handle 200 to make the first tripping member 11 rotate under the push of the operating handle 200.

[0049] Continue to refer to Figures 1 to 3 Since both the fourth mating part 115 and the third mating part 114 are disposed on the second main body 111 away from the second tripping member 21, in order to avoid interference between the fourth mating part 115 and the third mating part 114 and thus affect the operation of the circuit breaker, the fourth mating part 115 may be spaced apart from the third mating part 114 along the axial direction X of the second main body 111, based on the tubular or shaft-like structure of the second main body 111. It should be understood that in other embodiments, the fourth mating part 115 may also be connected to the third mating part 114 as a single component, and the fourth mating part 115 and the third mating part 114 may be arranged along the axial direction X of the second main body 111.

[0050] Figure 6 and Figure 7 The manual closing procedure of the circuit breaker is shown. For example... Figure 2 , Figure 6 and Figure 7 As shown, manually close the circuit after the thermal-magnetic trip is completed. Rotate the operating handle 200 towards the position adjacent to the thermal-magnetic trip unit 2. Since the blocking surface 1151 is located on the rotation path of the operating handle 200, the operating handle 200 can push the blocking surface 1151 to drive the first tripping member 11 to rotate clockwise. During the rotation of the first tripping member 11, since the first tripping member 11 is engaged with the rotating member 22, the first tripping member 11 can drive the rotating member 22 to rotate counterclockwise. The rotating member 22 pushes the second tripping member 21 to rotate counterclockwise and into the second tripping member 21. Figure 7 As shown, a gap still exists between the protrusion 223 and the locking part 212. Continuing to rotate the operating handle 200 away from the position of the thermomagnetic trip unit 2, since the operating handle 200 separates from the blocking surface 1151, the first tripping member 11 rotates counterclockwise under the action of the first torsion spring 41. Furthermore, the rotating member 22 rotates clockwise under the action of the elastic member 42, traversing the gap between the protrusion 223 and the locking part 212 until the protrusion 223 abuts against the locking part 212, thereby locking the rotating member 22 by the second tripping member 21. Moreover, the first tripping member 11 is in the closed position after the first torsion spring 41 releases energy, and the driving part 222 can be spaced apart from the first mating part 112.

[0051] Embodiments of this disclosure also provide a circuit breaker that includes any of the tripping components 100 described above.

[0052] The thermomagnetic tripping design according to embodiments of this disclosure can be applied to various circuit breakers to at least partially solve the above-mentioned problems. It should be understood that the thermomagnetic tripping design according to embodiments of this disclosure can also be applied to other electrical components, and the embodiments of this disclosure do not limit this application.

[0053] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A tripping assembly (100), characterized in that, The tripping assembly (100) includes: An electromagnetic trip unit (1) includes a first tripping element (11) rotatable to switch between a closed position and an open position; and The thermal-magnetic trip unit (2) includes a second tripping member (21) and a rotating member (22). The rotating member (22) is capable of cooperating with the first tripping member (11) and the second tripping member (21). The second tripping member (21) is capable of rotating to switch between a locked state and an unlocked state. When the second tripping member (21) unlocks the rotating member (22), the rotating member (22) can drive the first tripping member (11) to switch from the closed position to the open position.

2. The tripping assembly (100) according to claim 1, characterized in that, The rotating member (22) includes a first main body (221) and a driving part (222) disposed on the first main body (221). The first release member (11) includes a second main body (111) and a first mating part (112) disposed on the second main body (111) adjacent to the second release member (21), and the first mating part (112) is located on the rotation path of the driving part (222).

3. The tripping assembly (100) according to claim 2, characterized in that, When the rotating member (22) is locked and the first tripping member (11) is in the closed position, the driving part (222) is spaced apart from the first mating part (112).

4. The tripping assembly (100) according to claim 2, characterized in that, The first release member (11) further includes a pair of second mating portions (113) disposed on the second main body (111) adjacent to the second release member (21), wherein the pair of second mating portions (113) are spaced apart from the first mating portion (112) along the axial direction (X) of the second main body (111).

5. The tripping assembly (100) according to claim 4, characterized in that, The first tripping member (11) further includes a third mating part (114) disposed on the second main body (111) opposite to the second tripping member (21). The tripping assembly (100) further includes a locking member (3), which is located on the rotation path of the third mating part (114) and can lock the operating handle (200). During the process of the first tripping member (11) switching from the closed position to the open position, the third mating part (114) drives the locking member (3) to release the locking of the operating handle (200).

6. The tripping assembly (100) according to claim 5, characterized in that, The first release member (11) includes a fourth mating part (115) disposed on the second main body (111) opposite to the second release member (21). The fourth mating part (115) includes a blocking surface (1151) opposite to the second main body (111). The blocking surface (1151) can cooperate with the operating handle (200) to make the first release member (11) rotate under the push of the operating handle (200).

7. The tripping assembly (100) according to claim 6, characterized in that, Along the axial direction (X) of the second main body (111), the fourth mating part (115) is spaced apart from the third mating part (114), or The fourth mating part (115) is connected to the third mating part (114).

8. The tripping assembly (100) according to claim 2, characterized in that, The second release member (21) includes a third main body (211) and a locking part (212) disposed on the third main body (211). One end of the locking part (212) away from the third main body (211) is bent toward the rotating member (22) and abuts against the rotating member (22) to lock the rotating member (22).

9. The tripping assembly (100) according to claim 8, characterized in that, The rotating member (22) further includes a protrusion (223) provided on the first main body (221), and one end of the locking part (212) facing away from the third main body (211) abuts against the outer surface of the protrusion (223) and blocks the protrusion (223) from rotating.

10. A circuit breaker, characterized in that, The circuit breaker includes: The tripping assembly (100) according to any one of claims 1 to 9.

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