Moving contact assembly and circuit breaker
By simplifying the structure of the moving contact assembly and utilizing the combination of the abutment and the rotating shaft, the problem of high manufacturing cost of the moving contact assembly was solved, achieving cost reduction and efficiency improvement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DELIXI ELECTRIC
- Filing Date
- 2025-12-24
- Publication Date
- 2026-07-07
AI Technical Summary
The existing moving contact assembly has a structure that results in high manufacturing costs, requires high material conductivity, and generates a large amount of waste during the manufacturing process.
By simplifying the structure of the moving contact body and using the cooperation of the abutment, the second rotating shaft and the contact support, the connection protrusion on the moving contact body is avoided. The contact between the moving contact and the stationary contact is achieved by using the combination of the elastic element and the rotating shaft, thereby reducing the requirements of the material for conductivity.
It reduces the manufacturing cost of moving contact assemblies and circuit breakers, reduces waste in the manufacturing process, and improves operating efficiency and reliability.
Smart Images
Figure CN121565754B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage electrical technology, and in particular to a moving contact assembly and a circuit breaker. Background Technology
[0002] A circuit breaker is an electrical component that protects a circuit. When an overload, short circuit, or other fault occurs in a circuit, the circuit breaker can be switched to the open position to disconnect the circuit and prevent the fault from escalating.
[0003] A circuit breaker includes a moving contact assembly and a stationary contact assembly that cooperate with each other. The moving contact assembly is rotatable relative to the stationary contact assembly to adjust the contact state between the moving contact assembly and the stationary contact assembly, thereby adjusting the operating state of the circuit breaker.
[0004] The existing structure of moving contact assemblies results in high manufacturing costs. Summary of the Invention
[0005] This application provides a moving contact assembly and a circuit breaker. The moving contact assembly provided in this application simplifies the structure of the moving contact body and reduces the manufacturing cost of the moving contact assembly.
[0006] In a first aspect, this application provides a moving contact assembly used in a circuit breaker. The moving contact assembly includes a linkage shaft, a moving contact body, a contact support, a first rotating shaft, an abutment member, a second rotating shaft, and an elastic member. The linkage shaft has a receiving cavity. The moving contact body is mounted to the receiving cavity via the first rotating shaft, with a portion of the moving contact body extending out of the receiving cavity to form a contact portion, which can be electrically connected to the stationary contact assembly of the circuit breaker. The contact support is rotatably connected to the moving contact body via the first rotating shaft. The abutment member is rotatably connected to the contact support via the second rotating shaft, which is spaced apart from the moving contact body, and is located on the side of the first rotating shaft opposite to the contact portion. A first end of the elastic member abuts against the side of the abutment member opposite to the contact support, and a second end of the elastic member abuts against the cavity wall.
[0007] In this application example, the linkage shaft can provide a mounting carrier for the moving contact body, contact support, first rotating shaft, abutment, second rotating shaft, and elastic element. The moving contact body and contact support are rotatably mounted to the receiving cavity of the linkage shaft via the first rotating shaft, and the abutment and contact support are rotatably connected to the receiving cavity via the second rotating shaft. The first end of the elastic element abuts against the abutment, and the second end of the elastic element abuts against the cavity wall. When the elastic element is compressed, it applies a force to the contact support via the abutment. The abutment can rotate relative to the contact support about the second rotating shaft as its rotation center to adjust the direction of the force applied to the contact support by the elastic element through the abutment. Since the second rotating shaft is spaced apart from the moving contact body and is located on the side of the first rotating shaft away from the contact portion, the end of the contact support away from the contact portion can rotate towards the stationary contact assembly about the first rotating shaft as its rotation center under the action of the elastic element. After the contact support comes into contact with the moving contact body, the contact support applies a force to the moving contact body, causing the moving contact body to rotate toward the stationary contact assembly around the first rotation axis until the contact part contacts the stationary contact assembly, thereby closing the circuit breaker.
[0008] Compared to existing technologies, where a connecting protrusion is provided on the moving contact body and an elastic element abuts against the protrusion to apply force to the moving contact body, causing the moving contact body to contact the stationary contact assembly, in this application example, the moving contact body can contact the stationary contact assembly through the cooperation of the abutment element, the second rotating shaft, and the contact support. This avoids providing a connecting protrusion on the moving contact body, simplifies the structure of the moving contact body, and makes the moving contact body of this application closer to a cuboid shape, reducing waste generated during the manufacturing process of the moving contact body.
[0009] Furthermore, since the requirements for the conductivity of materials are higher for the moving contact body than for the contact member, the second rotating shaft, and the contact support, avoiding the setting of connecting protrusions on the moving contact body and reducing the waste generated during the manufacturing process of the moving contact body can reduce the manufacturing cost of the moving contact assembly, thereby reducing the manufacturing cost of the circuit breaker.
[0010] In some possible implementations, the contact support has a pushing protrusion on the side away from the abutment member. The side of the pushing protrusion facing the moving contact body can abut against the force-bearing part of the moving contact body, which is located on the side of the moving contact body away from the contact part.
[0011] In this application example, by providing a pushing protrusion on the side of the contact support away from the abutting member, the size of the contact support can be made longer, which in turn can make the distance between the second rotating shaft and the first rotating shaft larger, increasing the lever arm between the contact support and the moving contact body, reducing the requirements for the elastic member, and further reducing the manufacturing cost of the moving contact assembly.
[0012] In some possible implementations, the contact support is a contact arc surface facing the abutment, and the elastic element applies a force to the abutment so that the abutment can rotate relative to the contact arc surface about the second rotation axis.
[0013] In this application example, by setting the side of the contact support facing the abutment as the contact arc surface, the abutment can always be in contact with the contact arc surface line during the rotation of the contact support, thereby ensuring that the abutment is always in contact with the contact support line during the rotation, reducing the resistance that the abutment needs to overcome during the rotation of the contact support, and ensuring the operating efficiency of the moving contact assembly.
[0014] In some possible implementations, the contact support has a mounting groove on the side facing the abutment, the abutment is installed into the mounting groove, and the bottom wall of the mounting groove is a contact arc surface.
[0015] In this application example, by providing an installation groove on the side of the contact support facing the abutment, the abutment is installed into the installation groove. The relative position of the abutment and the contact support can be limited by the cooperation between the groove wall of the installation groove and the abutment, thus limiting the rotation angle of the abutment relative to the contact support.
[0016] In addition, by setting mounting slots in the contact support, the weight of the contact support can be reduced, thus lowering the manufacturing cost of the contact support.
[0017] In some possible implementations, the receiving cavity has a connecting structure on the side facing the abutment, the abutment has an abutment surface on the side facing the elastic member, the first end of the elastic member is connected to the connecting structure, and the second end of the elastic member abuts against the abutment surface.
[0018] In this application example, a connecting structure is provided on the side of the receiving cavity facing the abutment. Since the receiving cavity is located on the linkage shaft, by connecting the first end of the elastic element to the connecting structure, a reliable connection between the elastic element and the linkage shaft can be ensured, reducing the possibility of the elastic element detaching from the linkage shaft. The reliable connection of the first end of the elastic element to the linkage shaft via the connecting structure, and the abutment surface of the elastic element abutting the abutment, ensures the reliability of the elastic element installed between the linkage shaft and the abutment, reduces the possibility of the elastic element detaching from the linkage shaft and the elastic element itself, and ensures the reliability of the moving contact assembly.
[0019] In some possible implementations, the abutment member has multiple limiting protrusions on the side facing the elastic member, and the multiple limiting protrusions enclose a limiting space, with the abutment surface located within the limiting space.
[0020] In this example, the abutment member has multiple limiting protrusions spaced apart on the side facing the elastic member, and these protrusions enclose a limiting space. Since the second end of the elastic member is connected to the abutment surface, and the abutment surface is located within the limiting space, the limiting protrusions can limit the elastic member when it slides relative to the abutment surface, reducing the possibility of the elastic member disengaging from the abutment member and further ensuring the reliability of the connection between the elastic member and the abutment member.
[0021] In some possible implementations, the elastic element includes a first elastic element and a second elastic element, which are arranged in an axial direction parallel to the first rotation axis. The first end of the first elastic element is connected to a first position of the abutment, and the first end of the second elastic element is connected to a second position of the abutment. The first position and the second position are spaced apart. The second ends of both the first and second elastic elements are connected to the cavity wall of the receiving cavity.
[0022] In this application example, the first elastic element and the second elastic element cooperate to apply force to the contact support from different positions through the abutment member, making the rotation of the contact support relative to the moving contact body more stable, thereby making the force applied by the contact support to the moving contact body more stable and ensuring the reliability of the movement of the moving contact body.
[0023] In some possible implementations, the moving contact body includes a first moving contact and a second moving contact spaced apart, and the contact support includes a first support and a second support. The first moving contact is rotatably connected to the first support via a first rotating shaft, and the second moving contact is rotatably connected to the second support via the first rotating shaft. Along the direction of the abutment member toward the contact support, a first position corresponds to the first support, and a second position corresponds to the second support.
[0024] In this application example, the moving contact body includes a first moving contact and a second moving contact spaced apart, such that the first moving contact and the second moving contact cooperate with the stationary contact assembly to counteract at least part of the electro-repulsive force generated during the contact between the moving contact body and the stationary contact assembly, thereby improving the contact efficiency between the moving contact body and the stationary contact assembly and thus improving the operating efficiency of the circuit breaker.
[0025] Furthermore, since the first elastic member is connected to the first position of the abutment member, by setting the first position to correspond to the first support along the direction of the abutment member toward the contact support, the force loss of the first elastic member in the process of providing force to the contact support through the abutment member can be reduced. Similarly, since the second elastic member is connected to the second position of the abutment member, by setting the second position to correspond to the second support along the direction of the abutment member toward the contact support, the force loss of the second elastic member in the process of providing force to the contact support through the abutment member can be reduced.
[0026] In some possible implementations, the moving contact body includes a first moving contact and a second moving contact spaced apart, and the first rotating shaft includes a spaced protrusion located between the first moving contact and the second moving contact. The first moving contact and the second moving contact are rotatably connected to the contact via the first rotating shaft.
[0027] In this application example, by providing a gap protrusion between the first moving contact and the second moving contact, the first moving contact and the second moving contact are spaced apart, thereby enabling the first moving contact and the second moving contact to cooperate with the stationary contact assembly to counteract at least part of the electro-repulsive force generated during the contact between the moving contact body and the stationary contact assembly, thereby improving the contact efficiency between the moving contact body and the stationary contact assembly, and thus improving the operating efficiency of the circuit breaker.
[0028] Secondly, this application provides a circuit breaker including a stationary contact assembly, a moving contact assembly provided in the first aspect and various possible implementations of the first aspect, wherein the moving contact assembly is rotatable relative to the stationary contact assembly to adjust the contact state between the moving contact assembly and the stationary contact assembly.
[0029] The beneficial effects of the moving contact assembly provided in the second aspect and its various possible implementations can be found in the first aspect and its various possible implementations, and will not be repeated here. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the structure of a moving contact assembly provided as an example of this application.
[0031] Figure 2 This is a schematic diagram of the structure of a moving contact body provided as an example of this application.
[0032] Figure 3 This is a schematic diagram of a contact support structure provided as an example of this application.
[0033] Figure 4 This is a schematic diagram of the structure of an abutment provided as an example of this application.
[0034] Figure 5 This is a partial structural diagram of a moving contact assembly provided as an example of this application.
[0035] Figure 6 This is a schematic diagram of the structure of an abutment provided as an example of this application.
[0036] Figure 7 This is a partial structural diagram of a moving contact assembly provided as an example of this application.
[0037] Figure 8 This is a partial structural diagram of a moving contact assembly provided as an example of this application.
[0038] Figure 9 This is a partial structural diagram of a moving contact assembly provided as an example of this application.
[0039] Figure 10 This is a partial structural diagram of a moving contact assembly provided as an example of this application.
[0040] Figure 11 This is a schematic diagram of a connector provided as an example of this application.
[0041] Explanation of reference numerals in the attached figures:
[0042] 100. Moving contact assembly; 110. Linkage shaft; 111. Receiving cavity; 112. Connecting structure; 120. Moving contact body; 121. Contact portion; 122. Force-receiving portion; 123. First moving contact; 124. Second moving contact; 125. First through hole; 130. Contact support; 131. Pushing protrusion; 132. Contact arc surface; 133. Mounting groove; 134. First support; 135. Second support; 136. Second through hole; 137. Third through hole; 140. First rotating shaft; 150. Abutment member; 151. Abutment surface; 152. Limiting protrusion; 153. Fourth through hole; 160. Second rotating shaft; 170. Elastic member; 171. First elastic member; 172. Second elastic member; 180. Connecting member; 181. Fifth through hole. Detailed Implementation
[0043] To make the purpose, technical solutions, and advantages of the examples in this application clearer, the technical solutions in the examples of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described examples are only a part of the examples in this application, not all of them. Based on the examples in this application, all other examples obtained by those skilled in the art without inventive effort are within the scope of protection of this application.
[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used herein in the description of the application are for the purpose of describing particular examples only and are not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this application are intended to cover non-exclusive inclusion.
[0045] The term "example" as used herein means that a particular feature, structure, or characteristic described in connection with the example may be included in at least one example of this application. The appearance of the phrase "example" in various places throughout the specification does not necessarily refer to the same example, nor is it a separate or alternative example mutually exclusive with other examples. It will be explicitly and implicitly understood by those skilled in the art that the examples described herein can be combined with other examples.
[0046] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0047] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the moving contact assembly and circuit breaker of this application.
[0048] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.
[0049] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).
[0050] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0051] To enable those skilled in the art to better understand the present application, the moving contact assembly and circuit breaker provided in the present application will be clearly and completely described below with reference to the accompanying drawings.
[0052] For example, this application provides a circuit breaker. The circuit breaker includes a stationary contact assembly and a moving contact assembly, the moving contact assembly being rotatable relative to the stationary contact assembly to adjust the contact state between the moving contact assembly and the stationary contact assembly.
[0053] The circuit breaker also includes a housing, with the stationary contact assembly fixedly mounted inside the housing and the moving contact assembly rotatably mounted inside the housing. The moving contact assembly is rotatable relative to the stationary contact assembly. When the moving contact assembly is in contact with the stationary contact assembly, the circuit breaker is in the closed state, and current flows through the circuit connected to the circuit breaker. When the moving contact assembly is separated from the stationary contact assembly, the circuit breaker is in the open state, and no current flows through the circuit connected to the circuit breaker, facilitating circuit inspection and maintenance by operators.
[0054] In the event of an overload fault in the circuit, the circuit breaker can switch from the closed state to the open state under the action of the thermal protection components, providing protection for the circuit and reducing the possibility of the overload fault in the circuit escalating further.
[0055] In the event of a short circuit fault, the circuit breaker can switch from the closed state to the open state under the action of the magnetic protection mechanism, providing protection for the circuit and reducing the possibility of the short circuit fault further escalating.
[0056] Since the circuit breaker provided in this application example includes the moving contact assembly mentioned below, the circuit breaker provided in this application example has the same effects as the moving contact assembly provided in the embodiments below.
[0057] Next, the specific structure of the moving contact assembly will be described in detail.
[0058] For example, this application provides a moving contact assembly. Figure 1 This application provides a schematic diagram of the structure of a moving contact assembly. Figure 2 This application provides a schematic diagram of the structure of a moving contact body as an example. Figure 3 This application provides a schematic diagram of a contact support structure. Figure 4 This application provides a schematic diagram of the structure of an abutment component. Figure 5 Please refer to the partial structural diagram of a moving contact assembly provided as an example in this application. Figures 1-5The moving contact assembly 100 includes a linkage shaft 110, a moving contact body 120, a contact support 130, a first rotating shaft 140, a contact member 150, a second rotating shaft 160, and an elastic member 170. The linkage shaft 110 has a receiving cavity 111. The moving contact body 120 is mounted to the receiving cavity 111 via the first rotating shaft 140, with a portion of the moving contact body 120 extending out of the receiving cavity 111 to form a contact portion 121, which can be electrically connected to the stationary contact assembly of the circuit breaker. The contact support 130 is rotatably connected to the moving contact body 120 via the first rotating shaft 140. The contact member 150 is rotatably connected to the contact support 130 via the second rotating shaft 160, which is spaced apart from the moving contact body 120 and located on the side of the first rotating shaft 140 opposite to the contact portion 121. The first end of the elastic member 170 abuts against the side of the abutment member 150 away from the contact support 130, and the second end of the elastic member 170 abuts against the cavity wall of the receiving cavity 111.
[0059] The linkage shaft 110 is rotatably connected to the housing of the circuit breaker. The linkage shaft 110 is provided with at least one receiving cavity 111, the number of receiving cavities 111 is equal to the number of poles of the circuit breaker, and each pole of the circuit breaker is provided with a corresponding receiving cavity 111, and a corresponding moving contact body 120 is installed in the receiving cavity 111.
[0060] The moving contact body 120 is rotatably mounted to the receiving cavity 111 via the first rotating shaft 140. Part of the moving contact body 120 extends out of the receiving cavity 111 to form a contact portion 121. The contact portion 121 can contact the stationary contact assembly in the circuit breaker. By adjusting the contact state between the contact portion 121 and the stationary contact assembly, the circuit breaker can switch between the closed state and the open state.
[0061] The contact support 130 is rotatably connected to the moving contact body 120 via a first rotating shaft 140. Specifically, the moving contact body 120 is provided with a first through hole 125, and the contact support 130 is provided with a second through hole 136. The first rotating shaft 140 passes through the first through hole 125 and the second through hole 136 to achieve a rotatable connection between the contact support 130 and the moving contact body 120. The two ends of the first rotating shaft 140 are connected to two cavity sidewalls opposite to each other in the receiving cavity 111, and the arrangement direction of the two cavity sidewalls is parallel to the axial direction of the first rotating shaft 140.
[0062] The contact support 130 includes a first mounting plate and a second mounting plate spaced apart. A portion of the moving contact body 120 is disposed within the space formed by the cooperation of the first mounting plate and the second mounting plate. Both the first mounting plate and the second mounting plate are provided with second through holes 136. The first rotating shaft 140 can sequentially pass through the second through holes 136 in the first mounting plate, the first through holes 125 in the moving contact body 120, and the second through holes 136 in the second mounting plate to connect the moving contact body 120 between the first mounting plate and the second mounting plate, thereby ensuring the reliability of the connection between the contact support 130 and the moving contact body 120.
[0063] The abutment member 150 is rotatably connected to the contact support 130 via the second rotating shaft 160. Specifically, the contact support 130 is provided with a third through hole 137, and the abutment member 150 is provided with a fourth through hole 153. The second rotating shaft 160 passes through the third through hole 137 and the fourth through hole 153 to achieve a rotatable connection between the contact support 130 and the abutment member 150. Since the second rotating shaft 160 is spaced apart from the moving contact body 120, and the first rotating shaft 140 passes through the contact support 130 and the moving contact body 120, the second rotating shaft 160 and the first rotating shaft 140 are spaced apart. That is to say, the rotation center of the abutment member 150 is spaced apart from the rotation center of the moving contact body 120. The contact support 130 can rotate with the first rotating shaft 140 as its rotation center and with the second rotating shaft 160 as its rotation center.
[0064] The abutment member 150 may include a third mounting plate and a fourth mounting plate spaced apart, with a portion of the contact support 130 disposed within the space formed by the cooperation of the third and fourth mounting plates. Both the third and fourth mounting plates are provided with a fourth through hole 153, and both the first and second mounting plates of the contact support 130 are provided with a third through hole 137. The first mounting plate is connected to the third mounting plate, and the second mounting plate is connected to the fourth mounting plate. This application example does not limit the relative positions of the first and third mounting plates, or the second and fourth mounting plates, as long as a reliable connection between the contact support 130 and the abutment member 150 is ensured.
[0065] Since the second rotating shaft 160 is spaced apart from the first rotating shaft 140, the location of the third through hole 137 is spaced apart from the location of the second through hole 136.
[0066] The elastic element 170 can be a spring, a sheet, or other elastic element. In this application example, the elastic element 170 is described only as a spring. The first end of the elastic element 170 can directly abut against the abutment 150, or the first end of the elastic element 170 can be connected to the abutment 150 through a connecting structure. The second end of the elastic element 170 can directly abut against the cavity wall of the receiving cavity 111, or the second end of the elastic element 170 can be connected to the cavity wall of the receiving cavity 111 through a connecting structure. This application example does not impose specific limitations on this.
[0067] The moving contact body 120 is made of copper or other materials with good electrical conductivity. The abutment 150 and contact support 130 are made of steel or other materials with a certain strength.
[0068] In this application example, the linkage shaft 110 can provide a mounting carrier for the moving contact body 120, the contact support 130, the first rotating shaft 140, the abutment member 150, the second rotating shaft 160, and the elastic member 170. The moving contact body 120 and the contact support 130 are rotatably mounted to the receiving cavity 111 of the linkage shaft 110 via the first rotating shaft 140, and the abutment member 150 and the contact support 130 are rotatably connected to the receiving cavity 111 via the second rotating shaft 160. The first end of the elastic member 170 abuts against the abutment member 150, and the second end of the elastic member 170 abuts against the cavity wall of the receiving cavity 111. When the elastic member 170 is compressed, the elastic member 170 applies a force to the contact support 130 through the abutment member 150. The abutment member 150 can rotate relative to the contact support 130 about the second rotation axis 160 as the rotation center, so as to adjust the direction of the force applied by the elastic member 170 to the contact support 130 through the abutment member 150. Since the second rotation axis 160 is spaced apart from the moving contact body 120, and the second rotation axis 160 is located on the side of the first rotation axis 140 away from the contact portion 121, the end of the contact support 130 away from the contact portion 121 can rotate towards the stationary contact assembly about the first rotation axis 140 as the rotation center under the action of the elastic member 170. After the contact support 130 contacts the moving contact body 120, the contact support 130 applies a force to the moving contact body 120, causing the moving contact body 120 to rotate toward the stationary contact assembly with the first rotating shaft 140 as the rotation center, until the contact part 121 contacts the stationary contact assembly, thereby closing the circuit breaker.
[0069] Compared to existing technologies, where a connecting protrusion is provided on the moving contact body and an elastic element abuts against the connecting protrusion to apply force to the moving contact body, causing the moving contact body to contact the stationary contact assembly, in this application example, the moving contact body 120 can contact the stationary contact assembly through the cooperation of the abutment 150, the second rotating shaft 160, and the contact support 130. This avoids providing a connecting protrusion on the moving contact body 120, simplifies the structure of the moving contact body 120, and makes the moving contact body 120 of this application closer to a cuboid shape, reducing waste generated during the manufacturing process of the moving contact body 120.
[0070] Furthermore, since the conductivity requirements of the materials for the moving contact body 120 are higher than those for the contact member 150, the second rotating shaft 160, and the contact support 130, the connection protrusions on the moving contact body 120 are avoided, and the waste generated during the manufacturing process of the moving contact body 120 is reduced, thereby reducing the manufacturing cost of the moving contact assembly 100 and the circuit breaker manufacturing cost.
[0071] Based on the moving contact assembly 100 provided in the above example, please refer to... Figures 1-5 The contact support 130 has a pushing protrusion 131 on the side away from the abutment member 150. The pushing protrusion 131 can abut against the force-receiving part 122 of the moving contact body 120 on the side facing the moving contact body 120. The force-receiving part 122 is located on the side of the moving contact body 120 away from the contact part 121.
[0072] The push protrusion 131 can be a protrusion, post, ridge or other protrusion structure provided on the contact support 130. The push protrusion 131 can also be a protrusion structure formed by bending during the forming process of the contact support 130.
[0073] The side of the pushing protrusion 131 facing the moving contact body 120 can abut against the force-receiving portion 122 of the moving contact body 120. The force-receiving portion 122 is located on the side of the moving contact body 120 opposite to the contact portion 121. The pushing protrusion 131 and the force-receiving portion 122 can be in line contact. In this case, the side of the pushing protrusion 131 facing the force-receiving portion 122 is an arc surface, or the side of the force-receiving portion 122 facing the pushing protrusion 131 is an arc surface. The pushing protrusion 131 and the force-receiving portion 122 can also be in surface contact. In this case, the side of the pushing protrusion 131 facing the force-receiving portion 122 is a plane, and the side of the force-receiving portion 122 facing the pushing protrusion 131 is a plane. When the pushing protrusion 131 is in contact with the force-receiving part 122, the contact area between the pushing protrusion 131 and the force-receiving part 122 is larger and the contact is more stable, which can ensure the reliability of the rotation of the moving contact body 120 under the action of the contact support 130.
[0074] In this application example, by providing a pushing protrusion 131 on the side of the contact support 130 away from the abutment member 150, the size of the contact support 130 can be made longer, which in turn makes the distance between the second rotating shaft 160 and the first rotating shaft 140 larger, increasing the lever arm between the contact support 130 and the moving contact body 120, which can reduce the requirements for the elastic member 170, and further reduce the manufacturing cost of the moving contact assembly 100.
[0075] Furthermore, compared to the prior art, which extends the lever arm between the two rotation centers by adding a connecting protrusion on the moving contact body, resulting in more waste and higher costs during the manufacturing process of the moving contact body 120, the present application example shows that the lever arm between the two rotation centers can be extended by adjusting the contact support 130 and the abutment 150, thus reducing the manufacturing cost of the moving contact assembly 100.
[0076] Based on the moving contact assembly 100 provided in the above example, the side of the contact support 130 facing the abutment 150 is a contact arc surface 132, and the elastic member 170 applies a force to the abutment 150 so that the abutment 150 can rotate relative to the contact arc surface 132 with the second rotation axis 160 as the rotation center.
[0077] In this application example, by setting the side of the contact support 130 facing the abutment 150 as the contact arc surface 132, the abutment 150 can always be in line contact with the contact arc surface 132 during the rotation of the contact support 130. This ensures that the abutment 150 is always in line contact with the contact support 130 during the rotation, reducing the resistance that the abutment 150 needs to overcome during the rotation of the contact support 130 and ensuring the operating efficiency of the moving contact assembly 100.
[0078] Based on the moving contact assembly 100 provided in the above example, please refer to... Figures 1-5 The contact support 130 has a mounting groove 133 on the side facing the abutment 150. The mounting groove 133 is spaced apart from the second rotating shaft 160. The abutment 150 is installed into the mounting groove 133. The bottom wall of the mounting groove 133 near the second rotating shaft 160 is a contact arc surface 132.
[0079] The mounting groove 133 provided on the contact support 130 may include a first groove wall and a second groove wall, and the first groove wall and the second groove wall cooperate to form an "L" shaped structure. The first groove wall and the second groove wall cooperate with the bottom wall of the circuit breaker housing to form a "U" shaped structure, providing installation space for the abutment member 150.
[0080] In this application example, by providing an installation groove 133 on the side of the contact support 130 facing the abutment 150, the abutment 150 is installed into the installation groove 133. The cooperation between the groove wall of the installation groove 133 and the abutment 150 can limit the relative position of the abutment 150 and the contact support 130, and limit the rotation angle of the abutment 150 relative to the contact support 130.
[0081] Furthermore, by providing a mounting slot 133 in the contact support 130, the weight of the contact support 130 can be reduced, thereby lowering the manufacturing cost of the contact support 130.
[0082] Based on the moving contact assembly 100 provided in the above example Figure 6 Please refer to the structural schematic diagram of an abutment provided as an example in this application. Figures 1-6 The cavity 111 is provided with a connecting structure 112 on the side facing the abutment 150, and the abutment 150 is provided with an abutment surface 151 on the side facing the elastic member 170. The first end of the elastic member 170 is connected to the connecting structure 112, and the second end of the elastic member 170 abuts against the abutment surface 151.
[0083] The connecting structure 112 can be a protruding structure or a groove structure. The number of connecting structures 112 is equal to the number of elastic elements 170. Each elastic element 170 is connected to the corresponding connecting structure 112.
[0084] Taking the elastic element 170 as a spring as an example, when the connecting structure 112 is a protruding structure, the first end of the spring can be sleeved on the protruding structure. When the connecting structure 112 is a groove structure, the first end of the spring can extend into the groove structure.
[0085] The contact surface 151 may be provided with a marking structure. The marking structure may be a different color from the contact member 150, and the marking structure may be at least one of the patterns, text, and numbers provided on the contact surface 151. This application example does not impose specific limitations on this. By providing a marking structure on the contact surface 151, the operator can be reminded of the installation direction of the contact member 150, reducing the operator's identification time for the installation direction of the contact member 150, thereby improving the installation efficiency of the moving contact assembly 100.
[0086] In this application example, a connecting structure 112 is provided on the side of the receiving cavity 111 facing the abutment member 150. Since the receiving cavity 111 is located on the linkage shaft 110, by connecting the first end of the elastic member 170 to the connecting structure 112, a reliable connection between the elastic member 170 and the linkage shaft 110 can be ensured, reducing the possibility of the elastic member 170 detaching from the linkage shaft 110. The reliable connection between the first end of the elastic member 170 and the linkage shaft 110 via the connecting structure 112, and the second end of the elastic member 170 abutting against the abutment surface 151 of the abutment member 150, ensures the reliability of the elastic member 170 installed between the linkage shaft 110 and the abutment member 150, reduces the possibility of the elastic member 170 detaching from the linkage shaft 110 and the elastic member 170 itself, and ensures the reliability of the moving contact assembly 100.
[0087] Based on the moving contact assembly 100 provided in the above example, please refer to... Figures 1-6 The abutment 150 has multiple limiting protrusions 152 on the side facing the elastic member 170. The multiple limiting protrusions 152 enclose a limiting space, and the abutment surface 151 is located within the limiting space.
[0088] Two limiting protrusions 152 can be provided at intervals. In this case, the two interval protrusions can be provided on different sides of the abutment 150 away from the contact support 130. Three, four, etc. can be provided at intervals. This application example does not make specific restrictions on this. As long as the multiple limiting protrusions 152 can cooperate to form a limiting space to limit the elastic member 170 connected to the abutment 150.
[0089] In this application example, the abutment 150 has a plurality of limiting protrusions 152 spaced apart on the side facing the elastic member 170, and the plurality of limiting protrusions 152 enclose a limiting space. Since the second end of the elastic member 170 abuts against the abutment surface 151, and the abutment surface 151 is located within the limiting space, the limiting protrusions 152 can limit the elastic member 170 when it slides relative to the abutment surface 151, reducing the possibility of the elastic member 170 disengaging from the abutment 150, and further ensuring the reliability of the connection between the elastic member 170 and the abutment 150.
[0090] Based on the moving contact assembly 100 provided in the above example Figure 7 This application provides a partial structural schematic diagram of a moving contact assembly. Figure 8 Please refer to the partial structural diagram of a moving contact assembly provided as an example in this application. Figure 7 and Figure 8The elastic element 170 includes a first elastic element 171 and a second elastic element 172. The first elastic element 171 and the second elastic element 172 are arranged in an axial direction parallel to the first rotation axis 140. The first end of the first elastic element 171 is connected to the first position of the abutment 150, and the first end of the second elastic element 172 is connected to the second position of the abutment 150. The first position and the second position are spaced apart. The second ends of the first elastic element 171 and the second elastic element 172 are both connected to the cavity wall of the receiving cavity 111.
[0091] When the elastic element 170 includes a first elastic element 171 and a second elastic element 172, the moving contact body 120 may have one or two parts, and this application example does not impose a specific limitation on this.
[0092] With one movable contact body 120, the movable contact is positioned between the first position and the second position at the connection point of the abutment member 150. The distance between the movable contact at the connection point of the abutment member 150 and the first position is a first dimension, and the distance between the movable contact at the connection point of the abutment member 150 and the second position is a second dimension. The first dimension is substantially equal to the second dimension, meaning the difference between the first dimension and the second dimension is less than or equal to 2 millimeters. By setting the first dimension to be substantially equal to the second dimension, the force applied to the contact support 130 by the first elastic member 171 and the second elastic member 172 through the abutment member 150 can be more uniform. This, in turn, makes the force applied to the movable contact body 120 by the contact support 130 more uniform, ensuring the rotational reliability of the movable contact body 120.
[0093] In this application example, the first elastic element 171 and the second elastic element 172 cooperate to apply force to the contact support 130 from different positions through the abutment element 150, making the rotation of the contact support 130 relative to the moving contact body 120 more stable, thereby making the force applied by the contact support 130 to the moving contact body 120 more stable and ensuring the reliability of the operation of the moving contact body 120.
[0094] Based on the moving contact assembly 100 provided in the above example Figure 9 This application provides a partial structural schematic diagram of a moving contact assembly. Figure 10 Please refer to the partial structural diagram of a moving contact assembly provided as an example in this application. Figure 9 and Figure 10The moving contact body 120 includes a first moving contact 123 and a second moving contact 124 spaced apart. The contact support 130 includes a first support 134 and a second support 135. The first moving contact 123 is rotatably connected to the first support 134 via a first rotating shaft 140. The second moving contact 124 is rotatably connected to the second support 135 via the first rotating shaft 140. Along the direction of the abutment member 150 toward the contact support 130, the first position corresponds to the first support 134, and the second position corresponds to the second support 135.
[0095] The first support 134 and the second support 135 have similar structures to the contact support 130 mentioned above. The first support 134 includes two spaced-apart mounting plates, and the first moving contact 123 is mounted between the two spaced-apart mounting plates of the first support 134. The second support 135 includes two spaced-apart mounting plates, and the second moving contact 124 is mounted between the two spaced-apart mounting plates of the second support 135.
[0096] The first support 134 and the second support 135 can be in contact with each other, or they can be set at intervals. This application example does not impose specific restrictions on this.
[0097] In this application example, the moving contact body 120 includes a first moving contact 123 and a second moving contact 124 spaced apart, such that the first moving contact 123 and the second moving contact 124 cooperate with the stationary contact assembly to offset at least part of the electric repulsive force generated during the contact between the moving contact body 120 and the stationary contact assembly, thereby improving the contact efficiency between the moving contact body 120 and the stationary contact assembly and thus improving the operating efficiency of the circuit breaker.
[0098] Furthermore, since the first elastic member 171 is connected to the first position of the abutment member 150, by setting the first position corresponding to the first support 134 in the direction from the abutment member 150 toward the contact support 130, the force loss of the first elastic member 171 in the process of providing force to the contact support 130 through the abutment member 150 can be reduced. Similarly, since the second elastic member 172 is connected to the second position of the abutment member 150, by setting the second position corresponding to the second support 135 in the direction from the abutment member 150 toward the contact support 130, the force loss of the second elastic member 172 in the process of providing force to the contact support 130 through the abutment member 150 can be reduced.
[0099] Based on the moving contact assembly 100 provided in the above example, the moving contact body 120 includes a first moving contact 123 and a second moving contact 124 spaced apart. The first rotating shaft 140 includes a spaced protrusion (not shown in the figure), which is disposed between the first moving contact 123 and the second moving contact 124. The first moving contact 123 and the second moving contact 124 are rotatably connected to the contact support 130 through the first rotating shaft 140.
[0100] The spacer protrusion can be a protrusion structure provided on the first rotating shaft 140, or it can be a washer or other structural component sleeved on the first rotating shaft 140. This application example does not impose specific limitations on this.
[0101] The contact support 130 has only one, and the first moving contact 123 and the second moving contact 124, which are spaced apart, are located between the first mounting plate and the second mounting plate of the contact support 130 via the first rotating shaft 140.
[0102] Along the direction from the abutment 150 toward the contact support 130, a first position corresponds to the first support 134, and a second position corresponds to the second support 135. Since the first elastic member 171 is connected to the first position of the abutment 150, by setting the first position to correspond to the first support 134 along the direction from the abutment 150 toward the contact support 130, the force loss during the process of the first elastic member 171 providing force to the contact support 130 through the abutment 150 can be reduced. Similarly, since the second elastic member 172 is connected to the second position of the abutment 150, by setting the second position to correspond to the second support 135 along the direction from the abutment 150 toward the contact support 130, the force loss during the process of the second elastic member 172 providing force to the contact support 130 through the abutment 150 can be reduced.
[0103] In this application example, by providing a gap protrusion between the first moving contact 123 and the second moving contact 124, the first moving contact 123 and the second moving contact 124 are spaced apart, thereby enabling the first moving contact 123 and the second moving contact 124 to cooperate with the stationary contact assembly to offset at least part of the electro-repulsive force generated during the contact between the moving contact body 120 and the stationary contact assembly, thereby improving the contact efficiency between the moving contact body 120 and the stationary contact assembly, and thus improving the operating efficiency of the circuit breaker.
[0104] Based on the moving contact assembly 100 provided in the above example Figure 11 Please refer to the structural schematic diagram of a connector provided as an example in this application. Figure 1 and Figure 11The moving contact assembly 100 also includes a connector 180, which includes a fifth mounting plate and a sixth mounting plate spaced apart. Both the fifth mounting plate and the second mounting plate are provided with a fifth through hole 181. The first rotating shaft 140 passes through the fifth through hole 181 to achieve a rotatable connection between the connector 180 and the moving contact body 120. The side of the connector 180 facing the bottom wall of the housing is connected to the bottom wall of the housing by means of threaded connection, riveting, etc., to ensure the reliability of the connection between the moving contact assembly 100 and the housing.
[0105] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A moving contact assembly, characterized in that, The moving contact assembly is used in a circuit breaker, and the moving contact assembly includes: The linkage shaft is equipped with a receiving cavity; The moving contact body is mounted to the receiving cavity via a first rotating shaft, and a portion of the moving contact body extends out of the receiving cavity to form a contact portion, which can be electrically connected to the stationary contact assembly of the circuit breaker. The contact support is rotatably connected to the moving contact body via the first rotating shaft; The abutment is rotatably connected to the contact via a second rotating shaft. The second rotating shaft is spaced apart from the moving contact body, and the second rotating shaft is located on the side of the first rotating shaft away from the contact portion. An elastic element, the first end of which abuts against the side of the abutment opposite to the contact support, and the second end of which abuts against the cavity wall of the receiving cavity.
2. The moving contact assembly according to claim 1, characterized in that, The contact support has a pushing protrusion on the side away from the abutment member. The pushing protrusion facing the moving contact body can abut against the force-receiving part of the moving contact body. The force-receiving part is located on the side of the moving contact body away from the contact part.
3. The moving contact assembly according to claim 1 or 2, characterized in that, The contact head supports a contact arc surface on the side facing the abutment member, and the elastic member applies a force to the abutment member so that the abutment member can rotate relative to the contact arc surface with the second rotation axis as the rotation center.
4. The moving contact assembly according to claim 3, characterized in that, The contact support has a mounting groove on the side facing the abutment member. The mounting groove is spaced apart from the second rotating shaft. The abutment member is installed into the mounting groove. The bottom wall of the mounting groove near the second rotating shaft is the contact arc surface.
5. The moving contact assembly according to claim 1 or 2, characterized in that, The receiving cavity has a connecting structure on the side facing the abutting member, the abutting member has an abutting surface on the side facing the elastic member, the first end of the elastic member is connected to the connecting structure, and the second end of the elastic member abuts against the abutting surface.
6. The moving contact assembly according to claim 5, characterized in that, The abutting member has multiple limiting protrusions on the side facing the elastic member, and the multiple limiting protrusions enclose a limiting space, with the abutting surface located within the limiting space.
7. The moving contact assembly according to claim 1 or 2, characterized in that, The elastic element includes a first elastic element and a second elastic element, which are arranged along an axial direction parallel to the first rotation axis. The first end of the first elastic element is connected to a first position of the abutment, and the first end of the second elastic element is connected to a second position of the abutment. The first position and the second position are spaced apart. The second ends of the first elastic element and the second elastic element are both connected to the cavity wall of the receiving cavity.
8. The moving contact assembly according to claim 7, characterized in that, The moving contact body includes a first moving contact and a second moving contact spaced apart. The contact support includes a first support and a second support. The first moving contact is rotatably connected to the first support via a first rotating shaft. The second moving contact is rotatably connected to the second support via the first rotating shaft. Along the direction of the abutment member toward the contact support, the first position corresponds to the first support, and the second position corresponds to the second support.
9. The moving contact assembly according to claim 7, characterized in that, The moving contact body includes a first moving contact and a second moving contact spaced apart. The first rotating shaft includes a spaced protrusion located between the first moving contact and the second moving contact. The first moving contact and the second moving contact are rotatably connected to the contact via the first rotating shaft.
10. A circuit breaker, characterized in that, It includes a stationary contact assembly and a moving contact assembly as described in any one of claims 1 to 9, wherein the moving contact assembly is rotatable relative to the stationary contact assembly to adjust the contact state between the moving contact assembly and the stationary contact assembly.