Angular displacement sensor system and vacuum circuit breaker

Abstract

The invention relates to an angular displacement sensor system and a vacuum circuit breaker. The angular displacement sensor system comprises a signal receiver, an extension block, a fixing sleeve and a magnetic field sensing element. The extension block is attached to the rotating member. The outer surface of the extension block is at least partially sleeved with the fixing sleeve, and the interior of the fixing sleeve is in transmission connection with the outer surface of the extension block; at least part of the fixing sleeve is connected with the rotating component. The magnetic field sensing element is connected to the extension block, the magnetic field sensing element is arranged opposite to the signal receiver after being fixed, and the central axis of the magnetic field sensing element and the central axis of the rotating component are collinear. When the rotating part rotates relative to the central axis of the rotating part, the fixing sleeve, the extension block and the magnetic field sensing element synchronously rotate along with the rotating part, the fixing sleeve ensures that the extension block and the magnetic field sensing element are stably connected to the rotating part in the rotating process, and position deviation is avoided; and the magnetic field sensing element is kept centered with the rotating part in the rotating process.

Description

Technical Field

[0001] The present application relates to the technical field of sensor equipment, and in particular to an angular displacement sensor system and a vacuum circuit breaker. Background Art

[0002] For the angular displacement sensor system, it is necessary to attach a magnetic field sensing element to the rotating part to be measured, and set a signal receiver opposite to the magnetic field sensing element. An electromagnetic coupling area is formed between the signal receiver and the magnetic field sensing element. When the magnetic field sensing element rotates with the rotating part, it cuts the magnetic field to generate an electrical signal. The signal receiver receives the electrical signal and converts it to calculate the angular displacement of the rotating part. However, when the magnetic field sensing element rotates with the rotating part, it often deviates due to the vibration and shaking of the rotating part and cannot maintain centering, thus affecting the measurement accuracy. Summary of the invention

[0003] Based on this, it is necessary to provide an angular displacement sensor system and a vacuum circuit breaker to address the problem of measurement accuracy of the angular displacement sensor system.

[0004] An angular displacement sensor system, comprising:

[0005] Signal receiver;

[0006] An extension block, assembled on the rotating part;

[0007] A fixed sleeve, at least a portion of which is sleeved on the outer surface of the extension block, and at least a portion of which is connected to the rotating component;

[0008] A magnetic field sensing element is connected to the extension block, wherein the central axis of the magnetic field sensing element is colinear with the rotating component; and the magnetic field sensing element is arranged opposite to the signal receiver;

[0009] The interior of the fixed sleeve is in driving cooperation with the outer surface of the extension block; when the rotating component rotates relative to its own central axis, the fixed sleeve, the extension block and the magnetic field sensing element rotate synchronously with the rotating component.

[0010] In one embodiment, the extension block is assembled to the rotating component by a first fastener, and a shock absorbing component is arranged between the first fastener and the rotating component;

[0011] A first assembly hole is provided inside the extension block, and a first matching surface is provided inside the first assembly hole; a second assembly hole is provided on the rotating component;

[0012] The first fastener includes a first mating portion and a second mating portion connected to each other;

[0013] When the extension block and the rotating component are in a first assembly state, the first assembly hole and the second assembly hole are arranged opposite to each other, the first matching portion is arranged inside the first assembly hole, and the first matching portion presses the extension block onto the rotating component;

[0014] The second matching portion penetrates the first assembly hole to be connected with the second assembly hole; the shock absorbing component is sandwiched between the first matching portion and the first matching surface.

[0015] In one embodiment, the first assembly hole includes a first hole segment and a second hole segment, the hole diameter of the first hole segment is larger than the hole diameter of the second hole segment, and the first mating surface is formed at the connection position of the first hole segment and the second hole segment;

[0016] The interior of the second assembly hole is provided with an internal thread, and the surface of the second matching portion is provided with an external thread; the second matching portion is threadedly connected with the second assembly hole.

[0017] In one embodiment, a third assembly hole and a fourth assembly hole are formed on the fixing sleeve, and the fixing sleeve is sleeved on the outer surface of the extension block through the third assembly hole;

[0018] The inner wall of the third assembly hole is connected to the outer surface of the extension block;

[0019] A positioning hole is provided on the rotating component, and a second fastener is mounted on the fixing sleeve, wherein the second fastener includes a third matching portion and a fourth matching portion connected to each other;

[0020] When the fixing sleeve and the rotating component are in the second assembly state, the third matching portion is arranged on the outside of the fixing sleeve, and the third matching portion presses the fixing sleeve onto the rotating component; the fourth matching portion passes through the fourth assembly hole and is connected with the positioning hole.

[0021] In one embodiment, a first connecting portion is provided on the outer surface of the extension block; a second connecting portion is provided on the inner wall of the third assembly hole;

[0022] The first connecting portion is in transmission cooperation with the second connecting portion so that the extension block can rotate along with the fixing sleeve.

[0023] In one embodiment, the first connection portion is configured as an external spline, and the second connection portion is configured as an internal spline;

[0024] A plurality of external splines and internal splines are correspondingly arranged, and a spline pair is formed between the outer surface of the extension block and the inner wall of the third assembly hole.

[0025] In one embodiment, at least two fifth assembly holes are opened on the end surface of the extension block away from the rotating component, and the fifth assembly holes are evenly arranged around the opening of the first assembly hole;

[0026] The magnetic field sensing element includes a shell and a magnetic conductive block. The shell is provided with a sixth assembly hole and an installation groove. The sixth assembly hole is provided corresponding to the fifth assembly hole. The magnetic conductive block is installed in the installation groove.

[0027] A second matching surface is provided in the sixth assembly hole;

[0028] A third fastener is mounted on the magnetic field sensing element, and the third fastener includes a fifth matching portion and a sixth matching portion connected to each other;

[0029] When the magnetic field sensing element and the extension block are in the third assembly state, the fifth matching portion is arranged in the sixth assembly hole, and the fifth matching portion abuts the second matching surface to press the shell onto the extension block; the sixth matching portion passes through the sixth assembly hole to connect with the fifth assembly hole.

[0030] In one embodiment, the sixth assembly hole includes a third hole segment and a fourth hole segment, the hole diameter of the third hole segment is larger than the hole diameter of the fourth hole segment, and the second mating surface is formed at the connection position of the third hole segment and the fourth hole segment;

[0031] The interior of the fifth assembly hole is provided with an internal thread, and the surface of the sixth matching portion is provided with an external thread; the sixth matching portion is threadedly connected to the fifth assembly hole.

[0032] In one embodiment, the first fastener is configured as a screw;

[0033] And / or, the shock absorbing component is configured as a shock absorbing ring.

[0034] A vacuum circuit breaker, comprising any one of the above-mentioned angular displacement sensor systems, and further comprising: a circuit breaker housing and a circuit breaker main shaft; an inner cavity is arranged inside the circuit breaker housing, and the circuit breaker main shaft is arranged inside the inner cavity;

[0035] The angular displacement sensor system uses the circuit breaker main shaft as the rotating component;

[0036] The circuit breaker main shaft includes an assembly end, and the circuit breaker housing includes an assembly side wall arranged opposite to the assembly end;

[0037] The signal receiver is used to be assembled on the assembly side wall;

[0038] The extension block is assembled on the assembly end, at least a portion of the fixing sleeve is sleeved on the outer surface of the extension block, and at least a portion of the fixing sleeve is connected to the assembly end;

[0039] The magnetic field sensing element is connected to the extension block, and the magnetic field sensing element and the signal receiver are arranged opposite to each other, and the central axis of the magnetic field sensing element is colinear with the central axis of the main shaft of the circuit breaker.

[0040] The above-mentioned angular displacement sensor system includes a signal receiver, an extension block, a fixed sleeve and a magnetic field sensing element. The extension block is assembled on the rotating component, and the rotating component can rotate relative to its own central axis. At least part of the fixed sleeve is sleeved on the outer surface of the extension block, and the interior of the fixed sleeve is transmission-connected to the outer surface of the extension block; at least part of the fixed sleeve is connected to the rotating component. The magnetic field sensing element is connected to the extension block, and the magnetic field sensing element is fixed and arranged opposite to the signal receiver, and the central axis of the magnetic field sensing element is colinear with the central axis of the rotating component. When the rotating component rotates relative to its own central axis, the fixed sleeve, the extension block and the magnetic field sensing element will rotate synchronously with the rotating component to ensure that the rotation angle is highly consistent. During the rotation process, the fixed sleeve will ensure that the extension block is firmly connected to the rotating component to avoid positional displacement of the magnetic field sensing element, so that the magnetic field sensing element remains aligned with the rotating component during the rotation process.

[0041] A vacuum circuit breaker includes the above-mentioned angular displacement sensor system and has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the structure of the angular displacement sensor system provided in an embodiment of the present application.

[0043] Figure 2 This is a cross-sectional view of the magnetic field sensing element and the rotating component after assembly provided by an embodiment of the present application.

[0044] Figure 3 An exploded view of the parts assembly of the magnetic field sensing element and the fixing sleeve provided in the embodiment of the present application;

[0045] Figure 4 An exploded view of the assembly of the magnetic field sensing element and the fixing sleeve provided in an embodiment of the present application from another perspective;

[0046] Figure 5 A front view of an extension block provided in an embodiment of the present application;

[0047] Figure 6 A side cross-sectional view of an extension block provided in an embodiment of the present application;

[0048] Figure 7 A side cross-sectional view of the extension block provided in an embodiment of the present application at another viewing angle;

[0049] Figure 8 A front view of a fixing sleeve provided in an embodiment of the present application;

[0050] Fig. 9 A side view of a fixing sleeve provided in an embodiment of the present application;

[0051] Fig.10A front view of a magnetic field sensing element provided in an embodiment of the present application;

[0052] Fig.11 A side cross-sectional view of a magnetic field sensing element provided in an embodiment of the present application;

[0053] Fig.12 An exploded view of the parts assembly of the signal receiver provided in the embodiment of the present application;

[0054] Fig.13 A schematic diagram of the structure of a vacuum circuit breaker provided in an embodiment of the present application.

[0055] Figure Number:

[0056] 1000. signal receiver;

[0057] 2000, rotating component; 2001, second assembly hole;

[0058] 3000, magnetic field sensing element; 3001, housing; 3002, magnetic conductive block; 3003, sixth assembly hole; 3004, second mating surface;

[0059] 4000, first fastener; 4001, first matching portion; 4002, second matching portion;

[0060] 4010, second fastener; 4011, third matching portion; 4012, fourth matching portion;

[0061] 4020, third fastener; 4021, fifth matching portion; 4022, sixth matching portion;

[0062] 4030, fourth fastener;

[0063] 5000, shock absorbing components;

[0064] 6001, extension block; 6002, first assembly hole; 6003, first mating surface; 6004, first connecting portion; 6005, fifth assembly hole;

[0065] 7001, fixing sleeve; 7002, third assembly hole; 7003, fourth assembly hole; 7004, second connecting portion;

[0066] 8001. Circuit breaker housing; 8002. Circuit breaker main shaft. DETAILED DESCRIPTION

[0067] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0068] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0069] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0071] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0072] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0073] See also Figure 1 -Attached Figure 4 As shown, Figure 1 This is a schematic diagram of the structure of the angular displacement sensor system provided in an embodiment of the present application. Figure 2 This is a cross-sectional view of the magnetic field sensing element and the rotating component after assembly provided by an embodiment of the present application. Figure 3 This is an exploded view of the parts assembly of the magnetic field sensing element and the fixing sleeve provided in an embodiment of the present application. Figure 4 The exploded view of the parts assembly of the magnetic field sensing element and the fixing sleeve provided in the embodiment of the present application at another perspective shows an angular displacement sensor system, which includes: a signal receiver 1000, a magnetic field sensing element 3000, an extension block 6001 and a fixing sleeve 7001. The extension block 6001 is assembled on the rotating component 2000, and the rotating component 2000 can rotate along its own central axis.

[0074] At least part of the fixed sleeve 7001 is sleeved on the outer surface of the extension block 6001, and after the fixed sleeve 7001 is sleeved and connected with the extension block 6001, at least part of the fixed sleeve 7001 is also connected with the rotating component 2000. The interior of the fixed sleeve 7001 is transmission-connected with the outer surface of the extension block 6001, and when the rotating component 2000 rotates relative to its own central axis, it will drive the fixed sleeve 7001 to rotate synchronously, and the transmission cooperation between the fixed sleeve 7001 and the extension block 6001 will drive the extension block 6001 to rotate synchronously, ensuring that the rotation angles among the rotating component 2000, the extension block 6001 and the fixed sleeve 7001 are highly consistent, further ensuring that the change amount of the magnetic field cut by the magnetic induction element 3000 is accurate, thereby ensuring the accuracy of the measurement data. The setting of the fixing sleeve 7001 can prevent the extension block 6001 from loosening due to the vibration of the rotating component 2000, and reinforce the connection between the extension block 6001 and the rotating component 2000 while ensuring that the rotation of the rotating component 2000 is synchronously transmitted to the extension block 6001.

[0075] The magnetic field sensing element 3000 is connected to the extension block 6001. After the magnetic field sensing element 3000 is installed, the central axis of the magnetic field sensing element 3000 is colinear with the central axis of the rotating component 2000, thereby realizing the alignment of the magnetic field sensing element 3000 and the rotating component 2000. During the rotation of the rotating component 2000, the fixed sleeve 7001, the extension block 6001 and the magnetic field sensing element 3000 will all rotate synchronously with the rotating component 2000. During the rotation, the magnetic field sensing element 3000 and the rotating component 2000 can maintain the alignment effect, thereby ensuring the accuracy of the angular displacement sensor system measurement.

[0076] After assembly, the magnetic field sensing element 3000 is disposed opposite to the signal receiver 1000 , and an electromagnetic coupling region is formed between the magnetic field sensing element 3000 and the signal receiver 1000 .

[0077] When the rotating component 2000 rotates relative to its own central axis, the fixing sleeve 7001, the extension block 6001 and the magnetic field sensing element 3000 will rotate synchronously with the rotating component 2000, and the magnetic field in the electromagnetic coupling area is cut by the rotation of the magnetic field sensing element 3000, thereby generating an electrical signal.

[0078] The fixing sleeve 7001 can ensure that the extension block 6001 is firmly positioned on the rotating component 2000, and realize the synchronous rotation of the extension block 6001 and the rotating component 2000. Referring to the principle of the angular displacement sensor system, an electromagnetic coupling region is formed. The electromagnetic coupling region refers to the region in which: the magnetic field can be effectively transmitted from the magnetic field source to the magnetic field sensing element 3000, and when the magnetic field sensing element 3000 moves (such as rotating in the angular displacement sensor system), an electrical signal will be generated due to the cutting of the magnetic field, and the signal receiver 1000 can effectively receive this electrical signal. The electromagnetic coupling region refers to the region in which electromagnetic energy conversion and signal transmission are realized.

[0079] In order to realize the above-mentioned electromagnetic coupling area, reference can be made to the settings in the prior art, such as setting a permanent magnet to provide a stable magnetic field source. The permanent magnet is fixed in a position, and the magnetic field it generates can have a strong magnetic field strength within a certain space (such as a range of several centimeters to tens of centimeters, depending on the magnetic field strength and sensor design requirements). The magnetic field sensing element 3000 and the signal receiver 1000 are placed in this magnetic field space, so that the magnetic field sensing element 3000 can cut the magnetic field lines during rotation, thereby generating an electrical signal and being received by the signal receiver 1000. Similarly, in order to realize the above-mentioned electromagnetic coupling area, similar settings of the angular displacement sensor system in the prior art can also be applied, and this article will not expand on it.

[0080] The signal receiver 1000 can convert and calculate the electrical signal after receiving it, thereby obtaining a digital signal. The data displayed by the digital signal is the angular displacement of the rotating component. The specific configuration of the signal receiver 1000 can refer to the prior art.

[0081] The magnetic field sensing element 3000 needs to rotate along with the rotating component 2000 and cut the magnetic field to generate an electrical signal. The specific configuration may refer to the prior art.

[0082] The extension block 6001 is adapted to be installed on rotating parts 2000 of various specifications, so as to ensure that the magnetic field sensing element 3000 can be assembled in alignment with the rotating part 2000. The relative position of the magnetic field sensing element 3000 and the signal receiver 1000 can be adjusted by changing the specifications of the extension block 6001. After the signal receiver 1000 is positioned and installed, the extension block 6001 can be replaced to make the magnetic field sensing element 3000 closer to the signal receiver 1000, so that the sensing effect is better. Under the premise of configuring the fixing sleeve 7001, the extension block 6001 can always maintain a stable connection with the rotating part 2000. The specifications of the fixing sleeve 7001 can be adaptively matched according to the specifications of the extension block 6001, and no further details will be given here.

[0083] In some embodiments of the present application, refer to the attached specification Figure 5 -Attached Figure 7 , Figure 5 A front view of the extension block provided in an embodiment of the present application. Figure 6 A side sectional view of the extension block provided in an embodiment of the present application. Figure 7 The side cross-sectional view of the extension block provided in the embodiment of the present application at another viewing angle shows that the extension block 6001 is assembled on the rotating component 2000 through the first fastener 4000, and the magnetic field sensing element 3000 is assembled on the extension block 6001. A shock absorbing component 5000 is arranged between the first fastener 4000 and the rotating component 2000.

[0084] A first assembly hole 6002 is provided inside the extension block 6001, and a second assembly hole 2001 is provided on the rotating component 2000; a first mating surface 6003 is provided inside the first assembly hole 6002. The first fastener 4000 includes a first mating portion 4001 and a second mating portion 4002 connected to each other.

[0085] When the extension block 6001 and the rotating component 2000 are in the first assembly state, the first assembly hole 6002 and the second assembly hole 2001 are arranged opposite to each other, the first matching portion 4001 is arranged inside the first assembly hole 6002, and the second matching portion 4002 passes through the first assembly hole 6002 to be connected with the second assembly hole 2001; the shock absorbing component 5000 is clamped between the first matching portion 4001 and the first matching surface 6003.

[0086] The first assembly state refers to a state in which the extension block 6001 and the rotating component 2000 are assembled and positioned.

[0087] During actual assembly, the extension block 6001 needs to be tightly fitted to the corresponding position of the rotating component 2000 to ensure that the first assembly hole 6002 is completely aligned with the second assembly hole 2001. The first fastener 4000 is assembled into the first assembly hole 6002 and the second assembly hole 2001, and the second matching portion 4002 of the first fastener 4000 passes through the first assembly hole 6002 until the second matching portion 4002 is connected to the second assembly hole 2001 on the rotating component 2000. During the connection between the second matching portion 4002 and the second assembly hole 2001, the connection between the second matching portion 4002 and the second assembly hole 2001 is gradually tightened by tightening and other operations. As the connection between the second matching portion 4002 and the second assembly hole 2001 is continuously tightened, the first matching portion 4001 is subjected to a reaction force, thereby tightly pressing against the first matching surface 6003 through the shock absorbing component 5000. This interactive mode enables the extension block 6001 to be firmly mounted on the rotating component 2000, thereby achieving a stable and reliable connection between the two.

[0088] Before the first matching portion 4001 is installed in the first assembly hole 6002, the shock absorbing component 5000 is placed in the gap between the first matching portion 4001 and the first matching surface 6003. After the second matching portion 4002 is connected and fastened to the second assembly hole 2001, the shock absorbing component 5000 is tightly clamped between the first matching portion 4001 and the first matching surface 6003 to achieve the shock absorbing function.

[0089] The magnetic field sensing element 3000 is connected to the rotating part 2000, and the central axis of the magnetic field sensing element 3000 is ensured to be colinear with the central axis of the rotating part 2000. When the rotating part 2000 vibrates, the shock absorbing part 5000 can absorb or buffer the energy generated by the vibration, and reduce the vibration efficiency transmitted to the magnetic field sensing element 3000. This helps to maintain the stability of the magnetic field sensing element 3000 and prevent it from being displaced due to vibration, thereby better ensuring the accuracy of the system measurement. When the rotating part 2000 rotates, the magnetic field sensing element 3000 can always remain in the ideal position, reducing the measurement error caused by position displacement.

[0090] Through the precise matching of the first assembly hole 6002 and the second assembly hole 2001 and the connection of the first fastener 4000, the central axis of the magnetic field sensing element 3000 and the rotating component 2000 can always maintain a highly collinear state. Even if the rotating component 2000 encounters complex working conditions such as high-speed rotation and strong external force impact during operation, the magnetic field sensing element 3000 can minimize the offset by virtue of the stable connection structure between the extension block 6001 and the rotating component 2000, thereby significantly improving the accuracy and stability of angular displacement measurement, and providing reliable protection for various application scenarios that rely on accurate angular displacement data.

[0091] The damping component 5000 is sandwiched between the first mating portion 4001 and the first mating surface 6003, which greatly optimizes the damping effect. When the rotating component 2000 generates vibration, the vibration is first transmitted to the first mating portion 4001 of the first fastener 4000. At this time, the damping component 5000 located between the first mating portion 4001 and the first mating surface 6003 quickly takes effect, effectively absorbing and dispersing the vibration energy.

[0092] In some embodiments of the present application, the first assembly hole 6002 includes a first hole segment and a second hole segment, the hole diameter of the first hole segment is larger than the hole diameter of the second hole segment, and the first mating surface 6003 is formed at the connecting position of the first hole segment and the second hole segment; the first assembly hole 6002 can be set with reference to a conventional stepped hole, and the first mating surface 6003 is set as a stepped surface.

[0093] The interior of the second assembly hole 2001 is provided with an internal thread, and the surface of the second matching portion 4002 is provided with an external thread; the second matching portion 4002 is threadedly connected to the second assembly hole 2001 .

[0094] The first assembly hole 6002 is composed of a first hole segment and a second hole segment with different hole diameters. The hole diameter of the first hole segment is larger than that of the second hole segment. At the junction of the first hole segment and the second hole segment, a first mating surface 6003 for the first mating part 4001 to abut is formed due to the change in hole diameter.

[0095] During assembly, the first matching portion 4001 is first placed in the first assembly hole 6002, and then the second matching portion 4002 is passed through the first assembly hole 6002 and threadedly connected with the second assembly hole 2001. By rotating the second matching portion 4002, the external thread and the internal thread are gradually tightly connected. In this process, the connection between the second matching portion 4002 and the second assembly hole 2001 generates a reaction force that causes the first matching portion 4001 to press against the first matching surface 6003.

[0096] When the second matching portion 4002 is threadedly connected to the second assembly hole 2001 , the first matching portion 4001 is subjected to a reaction force generated by the connection between the second matching portion 4002 and the second assembly hole 2001 , thereby pressing the first matching surface 6003 through the shock absorbing component 5000 .

[0097] The stepped design of the first assembly hole 6002 combined with the threaded connection between the second matching portion 4002 and the second assembly hole 2001 forms a stable connection between the extension block 6001 and the rotating component 2000. This connection method can provide strong axial and circumferential constraints when the rotating component 2000 rotates at high speed or is subjected to large external forces, effectively preventing relative displacement between the two. At the same time, it ensures that the central axis of the magnetic field sensing element 3000 and the rotating component 2000 always remain in line, providing a solid guarantee for the accuracy and stability of angular displacement measurement, and contributing to the stable operation of the equipment.

[0098] In some embodiments of the present application, refer to the attached specification Figure 8 and attached Fig. 9 , Figure 8 This is a front view of the fixing sleeve provided in the embodiment of the present application. Fig. 9 A side view of a fixing sleeve provided in an embodiment of the present application; a third assembly hole 7002 and a fourth assembly hole 7003 are provided on the fixing sleeve 7001, and the fixing sleeve 7001 is sleeved on the outer surface of the extension block 6001 through the third assembly hole 7002; the inner wall of the third assembly hole 7002 is connected to the outer surface of the extension block 6001;

[0099] The rotating component 2000 is provided with a positioning hole, and the fixing sleeve 7001 is equipped with a second fastener 4010, and the second fastener 4010 includes a third matching portion 4011 and a fourth matching portion 4012 connected to each other;

[0100] When the fixing sleeve 7001 and the rotating component 2000 are in the second assembly state, the third matching portion 4011 is arranged on the outside of the fixing sleeve 7001, and the surface of the third matching portion 4011 presses the fixing sleeve 7001 onto the rotating component 2000; the fourth matching portion 4012 passes through the fourth assembly hole 7003 and is connected to the positioning hole.

[0101] The second assembly state refers to a state in which the fixing sleeve 7001 and the rotating component 2000 are assembled and positioned.

[0102] During assembly, align the third assembly hole 7002 of the fixing sleeve 7001 with the outer surface of the extension block 6001, and then insert the fixing sleeve 7001 along the axial direction of the extension block 6001. Since the inner wall of the third assembly hole 7002 is connected to the outer surface of the extension block 6001, this matching method can ensure that the fixing sleeve 7001 is stably installed on the extension block 6001, providing a basis for the subsequent connection with the rotating component 2000.

[0103] The second fastener 4010 is composed of a third matching portion 4011 and a fourth matching portion 4012 connected together. For example, the second fastener 4010 can be configured as a screw.

[0104] When the fixed sleeve 7001 and the rotating component 2000 are ready to enter the second assembly state, first align the fourth matching portion 4012 of the second fastener 4010 with the fourth assembly hole 7003 on the fixed sleeve 7001, and then pass it through the fourth assembly hole 7003. At this time, the position of the positioning hole on the rotating component 2000 should correspond to the fourth matching portion 4012 that passes through the fourth assembly hole 7003. Next, screw the fourth matching portion 4012 into the positioning hole, and the fourth matching portion 4012 is firmly connected to the positioning hole by tightening. In this process, due to the connection between the fourth matching portion 4012 and the positioning hole, the third matching portion 4011 generates a force in the direction of the fixed sleeve 7001. The third matching portion 4011 is arranged on the outer side of the fixed sleeve 7001, and the surface of the third matching portion 4011 tightly presses the fixed sleeve 7001 on the rotating component 2000, completing the entire assembly process of the fixed sleeve 7001 and the rotating component 2000.

[0105] The third assembly hole 7002 cooperates with the extension block 6001, and the second fastener 4010 firmly presses the fixing sleeve 7001 onto the rotating component 2000, so that the extension block 6001 and the rotating component 2000 are firmly connected. During the operation of the rotating component 2000, even if it is subjected to complex external forces, such as centrifugal force generated during high-speed rotation, impact forces in different directions, etc., the structure composed of the fixing sleeve 7001 and the second fastener 4010 can effectively resist these external forces, prevent the extension block 6001 and the rotating component 2000 from loosening, displacement, etc., and ensure the colinearity of the magnetic field sensing element 3000 and the central axis of the rotating component 2000, thereby improving the accuracy and stability of angular displacement measurement. The setting of the fixing sleeve 7001 and the second fastener 4010 enhances the rigidity and strength of the assembly of the extension block 6001 and the rotating component 2000. When the rotating component 2000 is subjected to a large impact, the fixing sleeve 7001 can disperse the impact force to a larger area, thereby reducing the situation where the local force is too large.

[0106] In some embodiments of the present application, a first connection portion 6004 is provided on the outer surface of the extension block 6001, and a second connection portion 7004 is provided on the inner wall of the third assembly hole 7002. The first connection portion 6004 and the second connection portion 7004 are in transmission cooperation, so that the extension block 6001 can rotate with the fixing sleeve 7001.

[0107] In order to achieve good transmission matching, the first connection part 6004 and the second connection part 7004 can be designed in various shapes. For example, the first connection part 6004 can be designed as a plurality of protrusions evenly distributed along the circumferential direction of the outer surface of the extension block 6001, and the second connection part 7004 can be correspondingly designed as grooves matching the protrusions, evenly distributed on the inner wall of the third assembly hole 7002. When the fixed sleeve 7001 is sleeved on the extension block 6001, these protrusions are just embedded in the grooves to form a tight transmission connection structure. Considering that they will frequently contact and rub during the rotation process, these two connection parts should be made of materials with good wear resistance and high strength. For example, high-strength alloy materials can be selected to ensure that the transmission performance will not be affected by wear during long-term use, and can withstand various stresses generated during the rotation process.

[0108] The transmission cooperation between the first connection part 6004 and the second connection part 7004 can ensure that the extension block 6001 and the fixing sleeve 7001 can achieve accurate synchronous rotation. When the rotating component 2000 drives the fixing sleeve 7001 to rotate, due to the close cooperation between the first connection part 6004 and the second connection part 7004, the extension block 6001 can quickly and accurately rotate with the fixing sleeve 7001 without lag or asynchronism.

[0109] In some embodiments of the present application, the first connection part 6004 is configured as an external spline, and the second connection part 7004 is configured as an internal spline. A plurality of external splines and internal splines are correspondingly provided, and a spline pair is formed between the outer surface of the extension block 6001 and the inner wall of the third assembly hole 7002.

[0110] Multiple external splines are evenly distributed on the outer surface of the extension block 6001. Similarly, multiple internal splines are evenly distributed on the inner wall of the third assembly hole 7002 of the fixed sleeve 7001. During assembly, the external splines correspond to the internal splines one by one, so that a spline pair is formed between the outer surface of the extension block 6001 and the inner wall of the inner hole of the third assembly hole 7002 of the fixed sleeve 7001. This evenly distributed design can ensure uniform force transmission in the circumferential direction and avoid damage caused by excessive local force. During the assembly process, the third assembly hole 7002 of the fixed sleeve 7001 is first aligned with the extension block 6001 so that the external splines and the internal splines are preliminarily aligned. Then, the fixed sleeve 7001 is slowly inserted into the extension block 6001 by using a suitable assembly tool, such as a special spline assembly fixture, to ensure that the external splines are smoothly embedded in the internal splines to form a tight connection.

[0111] The uniform distribution of multiple spline teeth ensures that the relative position between the extension block 6001 and the fixed sleeve 7001 is always accurate during the rotation process, ensuring that the central axis of the magnetic field sensing element 3000 and the rotating component 2000 are always collinear, effectively reducing the angular displacement measurement deviation caused by transmission error, improving the accuracy and precision of the measurement, and meeting the application scenarios with strict requirements for high-precision measurement.

[0112] In some embodiments of the present application, refer to the attached specification Fig.10 -Attached Fig.12 , Fig.10 This is a front view of the magnetic field sensing element provided in an embodiment of the present application. Fig.11 A side cross-sectional view of a magnetic field sensing element provided in an embodiment of the present application. Fig.12 This is an exploded view of the parts assembly of the signal receiver provided in the embodiment of the present application. At least two fifth assembly holes 6005 are opened on the end surface of the extension block 6001 away from the rotating component 2000. The fifth assembly holes 6005 are evenly arranged around the opening of the first assembly hole 6002.

[0113] The magnetic field sensing element 3000 includes a shell 3001 and a magnetic conductive block 3002. The shell 3001 is provided with a sixth assembly hole 3003 and a mounting groove. The sixth assembly hole 3003 is provided corresponding to the fifth assembly hole 6005. The magnetic conductive block 3002 is mounted in the mounting groove.

[0114] The sixth assembly hole 3003 is provided with a second mating surface 3004. A third fastener 4020 is mounted on the magnetic field sensing element 3000, and the third fastener 4020 includes a fifth mating portion 4021 and a sixth mating portion 4022 connected to each other;

[0115] When the magnetic field sensing element 3000 and the extension block 6001 are in the third assembly state, the fifth matching portion 4021 is arranged in the sixth assembly hole 3003, and the fifth matching portion 4021 abuts the second matching surface 3004, pressing the shell 3001 onto the extension block 6001; the sixth matching portion 4022 passes through the sixth assembly hole 3003 to connect with the fifth assembly hole 6005.

[0116] The third assembly state refers to a state in which the magnetic field sensing element 3000 and the extension block 6001 are assembled and positioned.

[0117] The magnetic field sensing element 3000 is composed of a shell 3001 and a magnetic conductive block 3002. The sixth assembly hole 3003 provided on the shell 3001 precisely corresponds to the fifth assembly hole 6005 on the extension block 6001, and a second mating surface 3004 is provided inside the sixth assembly hole 3003. Before formal assembly, the magnetic conductive block 3002 needs to be installed in the mounting groove of the shell 3001. The third fastener 4020 is composed of a fifth mating portion 4021 and a sixth mating portion 4022 connected to each other. When the third assembly of the magnetic field sensing element 3000 and the extension block 6001 is performed, the sixth mating portion 4022 is passed through the sixth assembly hole 3003 and docked with the corresponding fifth assembly hole 6005 on the extension block 6001; at this time, the fifth mating portion 4021 is located in the sixth assembly hole 3003. Subsequently, the sixth mating portion 4022 is fastened to the fifth assembly hole 6005 by tightening or other operations. As the connection is gradually tightened, the fifth mating portion 4021 is subjected to a corresponding reaction force, pressing against the second mating surface 3004 , thereby pressing the housing 3001 onto the extension block 6001 , thereby completing the assembly of the magnetic field sensing element 3000 and the extension block 6001 .

[0118] With the precise corresponding arrangement of the fifth assembly hole 6005 and the sixth assembly hole 3003, and the connection of the third fastener 4020, the magnetic field sensing element 3000 is prevented from loosening or displacement during the rotation process, and the central axis of the magnetic field sensing element 3000 and the rotating component 2000 are always ensured to remain in a collinear state. The stable position of the magnetic conductive block 3002 helps to improve the sensing accuracy of the magnetic field sensing element 3000 to the magnetic field change, thereby further improving the measurement accuracy of the entire angular displacement sensor system.

[0119] In some embodiments of the present application, the sixth assembly hole 3003 includes a third hole segment and a fourth hole segment, the hole diameter of the third hole segment is larger than the hole diameter of the fourth hole segment, and the second mating surface 3004 is formed at the connection position of the third hole segment and the fourth hole segment;

[0120] The fifth assembly hole 6005 is provided with an internal thread inside, and the surface of the sixth matching portion 4022 is provided with an external thread; the sixth matching portion 4022 is threadedly connected to the fifth assembly hole 6005 .

[0121] The fifth assembly hole 6005 is provided with an internal thread inside, and the surface of the sixth matching part 4022 is provided with an external thread. When the fifth matching part 4021 is placed at a suitable position of the sixth assembly hole 3003, the sixth matching part 4022 is passed through the fourth hole section of the sixth assembly hole 3003 and aligned with the fifth assembly hole 6005 on the extension block 6001. By rotating the third fastener 4020, the external thread and the internal thread gradually engage tightly. During the thread screwing process, the sixth matching part 4022 continuously penetrates into the fifth assembly hole 6005. The stepped design of the sixth assembly hole 3003, combined with the threaded connection between the sixth matching part 4022 and the fifth assembly hole 6005, enhances the connection stability between the magnetic field sensing element 3000 and the extension block 6001. When the rotating component 2000 runs at high speed or is subjected to complex external forces, the strong axial and circumferential constraints provided by the threaded connection effectively prevent the relative displacement between the magnetic field sensing element 3000 and the extension block 6001. At the same time, the close fit between the second mating surface 3004 and the fifth mating portion 4021 further ensures the stability of the magnetic field sensing element 3000 in the installation position, always maintaining the colinearity of the magnetic field sensing element 3000 and the central axis of the rotating component 2000, and providing reliable guarantee for high-precision measurement of angular displacement.

[0122] In some embodiments of the present application, when the first fastener 4000 is a screw, the screw head serves as the first matching portion 4001, and the screw rod portion serves as the second matching portion 4002. Specifically, an M6×20 hexagon socket screw may be used, which refers to a hexagon socket screw with a nominal diameter of 6 mm and a length of 20 mm.

[0123] During the assembly operation, firstly, the screw head (first matching part 4001) is placed in the first assembly hole 6002 of the extension block 6001. At the same time, the shock-absorbing collar is put on the screw rod so that the shock-absorbing collar is between the screw head and the first matching surface 6003 of the first assembly hole 6002. Subsequently, since the second assembly hole 2001 is provided with an internal thread, which matches the external thread of the screw rod, the screw rod (second matching part 4002) of the screw is passed through the first assembly hole 6002 and screwed into the second assembly hole 2001 of the rotating component 2000. In the process of rotating the screw, the screw rod (second matching part 4002) gradually penetrates into the second assembly hole 2001, and the screw head (first matching part 4001) continuously presses the shock-absorbing collar, thereby firmly fixing the extension block 6001 on the rotating component 2000.

[0124] If the second fastener 4010 is also a screw, the screw portion is the fourth matching portion 4012, and the screw head is the third matching portion 4011. Specifically, an M4×20 hexagon socket screw may be used, which is a hexagon socket screw with a nominal diameter of 4 mm and a length of 20 mm.

[0125] During operation, the fourth assembly hole 7003 of the fixed sleeve 7001 is precisely aligned with the positioning hole of the rotating component 2000, and the screw rod (fourth matching portion 4012) of the screw is inserted into the fourth assembly hole 7003 from the outside of the fixed sleeve 7001, and then screwed into the positioning hole of the rotating component 2000. As the screw is continuously tightened, the screw head (third matching portion 4011) will press the fixed sleeve 7001 tightly against the rotating component 2000, achieving a stable connection between the fixed sleeve 7001 and the rotating component 2000, and further strengthening the stability of the assembly of the extension block 6001 and the rotating component 2000.

[0126] When the third fastener 4020 is a screw, the screw head serves as the fifth matching portion 4021, and the screw shaft of the screw serves as the sixth matching portion 4022. Specifically, an M3×10 hexagon socket screw may be used, which refers to a hexagon socket screw with a nominal diameter of 3 mm and a length of 10 mm.

[0127] First, align the sixth assembly hole 3003 of the magnetic field sensing element 3000 with the fifth assembly hole 6005 on the extension block 6001, and put the screw head (fifth matching part 4021) into the third hole section of the sixth assembly hole 3003. Next, make the screw rod (sixth matching part 4022) pass through the fourth hole section of the sixth assembly hole 3003 and be threadedly connected with the fifth assembly hole 6005 on the extension block 6001. By rotating the screw, the screw head (fifth matching part 4021) is in close contact with and pressed against the second matching surface 3004, and at the same time, the screw rod (sixth matching part 4022) is tightly connected with the fifth assembly hole 6005, so that the magnetic field sensing element 3000 is firmly installed on the extension block 6001.

[0128] The shock-absorbing collar is made of rubber or other elastic materials with shock-absorbing properties, and its inner diameter is adapted to the screw size of the first fastener 4000 (screw), and its outer diameter is in close contact with the first mating surface 6003 of the first assembly hole 6002. During the assembly of the first fastener 4000, the shock-absorbing collar is put on the screw so that it is located between the first mating surface 6003 of the first assembly hole 6002 and the screw head. Once the rotating component 2000 vibrates, the shock-absorbing collar can effectively buffer the vibration transmission by virtue of its own elastic deformation, and effectively reduce the adverse effects of vibration on the magnetic field sensing element 3000.

[0129] Reference Manual Attached Fig.13 , Fig.13 A schematic diagram of the structure of a vacuum circuit breaker provided in an embodiment of the present application. A vacuum circuit breaker is shown, comprising the above-mentioned angular displacement sensor system, and further comprising: a circuit breaker housing 8001 and a circuit breaker main shaft 8002. An inner cavity is provided inside the circuit breaker housing 8001, and the circuit breaker main shaft 8002 is provided inside the inner cavity. The angular displacement sensor system uses the circuit breaker main shaft 8002 as a rotating component 2000. The circuit breaker main shaft 8002 includes an assembly end, and the circuit breaker housing 8001 includes an assembly side wall arranged opposite to the assembly end, and the signal receiver 1000 is assembled on the assembly side wall by a fourth fastener 4030, and the fourth fastener 4030 can be arranged with reference to the prior art, for example, it is arranged as a screw.

[0130] The extension block 6001 is assembled on the assembly end. At least a portion of the fixing sleeve 7001 is sleeved on the outer surface of the extension block 6001, and at least a portion of the fixing sleeve 7001 is connected to the assembly end.

[0131] The magnetic field sensing element 3000 is connected to the extension block 6001 , and the magnetic field sensing element 3000 is disposed opposite to the signal receiver 1000 , and the central axis of the magnetic field sensing element 3000 is colinear with the central axis of the circuit breaker main shaft 8002 .

[0132] By closely combining the angular displacement sensor system with the circuit breaker main shaft 8002, the angular displacement changes of the circuit breaker main shaft 8002 can be monitored in real time and accurately. Since the magnetic field sensing element 3000 is colinear with the central axis of the circuit breaker main shaft 8002, and the signal receiver 1000 is installed in a precise position, the sensor system can accurately capture the changes in the electromagnetic signal generated when the main shaft rotates, thereby providing the operator with accurate information about the opening and closing status of the circuit breaker, which helps to promptly detect abnormal conditions during the operation of the circuit breaker and ensure the safe and stable operation of the power system. The other parts of the structure of the vacuum circuit breaker can refer to the existing technical settings and will not be repeated in this article.

[0133] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0134] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An angular displacement sensor system, characterized in that: include: Signal receiver; An extension block, assembled on the rotating part; a fixed sleeve, at least a portion of which is sleeved on an outer surface of the extension block, and at least a portion of which is connected to the rotating component; A magnetic field sensing element is connected to the extension block, wherein the central axis of the magnetic field sensing element is colinear with the rotating component; and the magnetic field sensing element is arranged opposite to the signal receiver; The interior of the fixed sleeve is in driving cooperation with the outer surface of the extension block; when the rotating component rotates relative to its own central axis, the fixed sleeve, the extension block and the magnetic field sensing element rotate synchronously with the rotating component.

2. The angular displacement sensor system according to claim 1, characterized in that: The extension block is assembled to the rotating component through a first fastener, and a shock absorbing component is arranged between the first fastener and the rotating component; A first assembly hole is provided inside the extension block, and a first matching surface is provided inside the first assembly hole; a second assembly hole is provided on the rotating component; The first fastener includes a first mating portion and a second mating portion connected to each other; When the extension block and the rotating component are in a first assembly state, the first assembly hole and the second assembly hole are arranged opposite to each other, the first matching portion is arranged inside the first assembly hole, and the first matching portion presses the extension block onto the rotating component; The second matching portion passes through the first assembly hole to be connected with the second assembly hole; the shock absorbing component is sandwiched between the first matching portion and the first matching surface.

3. The angular displacement sensor system according to claim 2, characterized in that: The first assembly hole comprises a first hole segment and a second hole segment, the hole diameter of the first hole segment is larger than the hole diameter of the second hole segment, and the first matching surface is formed at the connection position of the first hole segment and the second hole segment; The interior of the second assembly hole is provided with an internal thread, and the surface of the second matching portion is provided with an external thread; the second matching portion is threadedly connected to the second assembly hole.

4. The angular displacement sensor system according to claim 2, characterized in that: The fixing sleeve is provided with a third assembly hole and a fourth assembly hole, and the fixing sleeve is sleeved on the outer surface of the extension block through the third assembly hole; The inner wall of the third assembly hole is connected to the outer surface of the extension block; The rotating component is provided with a positioning hole, the fixing sleeve is equipped with a second fastener, and the second fastener includes a third matching portion and a fourth matching portion connected to each other; When the fixing sleeve and the rotating component are in the second assembly state, the third matching portion is arranged on the outside of the fixing sleeve, and the third matching portion presses the fixing sleeve onto the rotating component; the fourth matching portion passes through the fourth assembly hole and is connected to the positioning hole.

5. The angular displacement sensor system according to claim 4, characterized in that: A first connecting portion is provided on the outer surface of the extension block; a second connecting portion is provided on the inner wall of the third assembly hole; The first connecting portion is in transmission cooperation with the second connecting portion so that the extension block can rotate along with the fixing sleeve.

6. The angular displacement sensor system according to claim 5, characterized in that: The first connection part is configured as an external spline, and the second connection part is configured as an internal spline; A plurality of the external splines and the internal splines are correspondingly arranged, and a spline pair is formed between the outer surface of the extension block and the inner wall of the third assembly hole.

7. The angular displacement sensor system according to claim 2, characterized in that: At least two fifth assembly holes are formed on the end surface of the extension block away from the rotating component, and the fifth assembly holes are evenly arranged around the opening of the first assembly hole; The magnetic field sensing element comprises a shell and a magnetic conductive block, the shell is provided with a sixth assembly hole and a mounting groove, the sixth assembly hole is provided corresponding to the fifth assembly hole, and the magnetic conductive block is mounted in the mounting groove; A second matching surface is provided in the sixth assembly hole; A third fastener is mounted on the magnetic field sensing element, and the third fastener includes a fifth matching portion and a sixth matching portion connected to each other; When the magnetic field sensing element and the extension block are in the third assembly state, the fifth matching portion is arranged in the sixth assembly hole, and the fifth matching portion abuts the second matching surface to press the shell onto the extension block; the sixth matching portion passes through the sixth assembly hole to be connected with the fifth assembly hole.

8. The angular displacement sensor system according to claim 7, characterized in that: The sixth assembly hole includes a third hole segment and a fourth hole segment, the hole diameter of the third hole segment is larger than the hole diameter of the fourth hole segment, and the second mating surface is formed at the connection position of the third hole segment and the fourth hole segment; The interior of the fifth assembly hole is provided with an internal thread, and the surface of the sixth matching portion is provided with an external thread; the sixth matching portion is threadedly connected to the fifth assembly hole.

9. The angular displacement sensor system according to claim 2, characterized in that: The first fastener is configured as a screw; And / or, the shock absorbing component is configured as a shock absorbing ring.

10. A vacuum circuit breaker, characterized in that: The angular displacement sensor system comprises any one of claims 1 to 9, and further comprises: a circuit breaker housing and a circuit breaker main shaft; an inner cavity is provided inside the circuit breaker housing, and the circuit breaker main shaft is provided inside the inner cavity; The angular displacement sensor system uses the circuit breaker main shaft as a rotating component; The circuit breaker main shaft includes an assembly end, and the circuit breaker housing includes an assembly side wall arranged opposite to the assembly end; The signal receiver is used to be assembled on the assembly side wall; the extension block is assembled on the assembly end, at least a portion of the fixing sleeve is sleeved on the outer surface of the extension block, and at least a portion of the fixing sleeve is connected to the assembly end; The magnetic field sensing element is connected to the extension block, and the magnetic field sensing element is arranged opposite to the signal receiver, and the central axis of the magnetic field sensing element is collinear with the central axis of the circuit breaker main shaft.

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