Operating mechanism and circuit breaker

Abstract

The utility model discloses an operating mechanism and breaker relates to electrical equipment technical field, the operating mechanism includes support and moving contact subassembly, the moving contact subassembly is installed on the support, the support includes main part and shaft part, the shaft part protrudes relative to the main part, the main part is equipped with the moving contact subassembly, and the shaft part is equipped with the moving contact subassembly. And the shaft part and the main body part are subjected to metal injection molding to form a bracket body. According to the technical scheme of the utility model, the shaft part is arranged on the support of the operating mechanism, the shaft part is arranged in a protruding manner relative to the main body part of the support, and the shaft part and the main body part are molded into a support body through metal injection. Through the arrangement, the support of the operating mechanism can integrate the plurality of shaft parts on the main body part of the support without designing a shaft hole, so that the problem of large assembly clearance between the shaft parts and the main body part is not worried about, and the requirements on the precision of the shaft parts and the main body part are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an operating mechanism and a circuit breaker. Background Art

[0002] At present, circuit breakers are widely used as an important electrical protection device. Circuit breakers can be used to connect, carry or disconnect current in normal circuits and abnormal circuits. Circuit breakers usually include structures such as operating mechanisms and tripping mechanisms to achieve the switching of closing and opening states in normal or abnormal circuits.

[0003] The bracket on the operating mechanism of the existing circuit breaker is generally designed to be movably connected with a main body and several pins. The main body is connected to the locking parts in the operating mechanism through multiple pins. However, because the multiple pins are mounted on the main body through shaft holes, there is often a large assembly gap between the main body and the pins, and high precision requirements are imposed on the main body and the pins, resulting in unstable movement of the operating mechanism. Utility Model Content

[0004] The main purpose of the utility model is to provide an operating mechanism and a circuit breaker, aiming to solve the problem that the bracket on the operating mechanism of the existing circuit breaker is designed to be movably connected with a main body and several pins, the assembly gap between the main body and the pins is large, and the precision requirements for the main body and the pins are also high.

[0005] In order to achieve the above-mentioned object, the operating mechanism proposed in the present utility model comprises a bracket and a moving contact assembly, the moving contact assembly is mounted on the bracket, and the bracket comprises:

[0006] the main body; and

[0007] The shaft portion is protruding relative to the main body portion, and the shaft portion is fixedly connected to the main body portion to form a bracket body.

[0008] In one embodiment, there are multiple shaft portions, the multiple shaft portions are arranged at intervals and located on the same side of the main body portion, and one end of the multiple shaft portions is fixedly connected to the main body portion;

[0009] In one embodiment, the moving contact assembly includes an upper contact, a locking piece and a lower contact, and the multiple shaft portions include a first shaft, a second shaft and a third shaft, the second shaft is located between the first shaft and the third shaft, the first shaft is movably connected to the upper contact, the second shaft is movably connected to the locking piece, the third shaft is movably connected to the lower contact, and the locking piece is in contact with the upper contact and the lower contact.

[0010] In one embodiment, the first shaft includes a positioning portion and a locking portion, one end of the positioning portion is fixedly connected to the main body portion, and the other end is fixedly connected to the locking portion, and the upper contact is movably mounted on the positioning portion.

[0011] In one embodiment, the plurality of shaft portions further include a fixed shaft, the fixed shaft is fixedly connected to the main body portion, the fixed shaft is disposed close to the second shaft, and an outer edge of the locking member abuts against the fixed shaft.

[0012] In one embodiment, the plurality of shaft portions further include a positioning shaft, the positioning shaft is located between the second shaft and the third shaft, and the positioning shaft abuts against the lower contact.

[0013] In one embodiment, a portion of the structure of the second shaft is protrudingly disposed on a side of the main body away from the locking component.

[0014] In one embodiment, a limiting axis is protruded from a side of the main body away from the locking member.

[0015] In one embodiment, the limiting shaft is conical in shape.

[0016] The utility model also proposes a circuit breaker, comprising a base, a shell and an operating mechanism, wherein the operating mechanism is mounted on the base, the base is mounted on the shell, the bracket is rotatably mounted on the base, and a plurality of shafts are arranged on a side of the bracket away from the base.

[0017] The technical solution of the utility model is to arrange the shaft portion on the bracket of the operating mechanism, wherein the shaft portion is arranged protruding relative to the main body of the bracket, and the shaft portion and the main body are metal injection molded into a bracket body. In this way, the bracket of the operating mechanism of the utility model can integrate multiple shaft portions on the main body of the bracket, and there is no need to design shaft holes, so there is no need to worry about the problem of large assembly gap between the shaft portion and the main body, and the requirements for the accuracy of the shaft portion and the main body are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a bracket provided by the utility model;

[0020] Figure 2This is a structural schematic diagram of an operating mechanism according to an embodiment of the present invention.

[0021] Description of Figure Numbers:

[0022] 100. Operating mechanism;

[0023] 10. bracket; 11. main body; 12. shaft; 121. first shaft; 1210. positioning part;

[0024] 1211, a locking portion; 122, a second axis; 123, a third axis; 124, a fixed axis; 125, a positioning axis;

[0025] 126, limit axis;

[0026] 20. Moving contact assembly; 21. Upper contact; 22. Locking piece; 23. Lower contact.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution satisfied by A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0031] The bracket 10 on the operating mechanism 100 of the existing circuit breaker is generally designed to be movably connected with a main body 11 and several pins. The main body 11 is connected to the locking member 22 in the operating mechanism 100 through multiple pins. However, because multiple pins are mounted on the main body 11 through shaft holes, there is often a problem of large assembly clearance between the main body 11 and the pins. In order to limit the pins on the main body 11, it is usually necessary to improve the accuracy of the main body 11 and the pins to avoid excessive assembly deviation between the pins and the main body. Therefore, the bracket 10 of the operating mechanism 100 of the existing circuit breaker has relatively high requirements on the accuracy of the pins and the main body 11.

[0032] The utility model provides an operating mechanism 100. Please refer to Figure 1 In one embodiment of the present invention, the operating mechanism 100 proposed by the present invention includes a bracket 10 and a moving contact assembly 20. The moving contact assembly 20 is installed on the bracket 10. The bracket 10 includes:

[0033] a main body portion 11; and

[0034] The shaft portion 12 is protruding relative to the main body portion 11 , and the shaft portion 12 is fixedly connected to the main body portion 11 to form a bracket 10 body.

[0035] The bracket 10 of the present invention is formed by metal injection molding process, and the shaft portion 12 is directly formed on the main body 11. That is, in the process of manufacturing the bracket 10 of the operating mechanism 100, the shaft portion 12 is directly formed on the main body 11 to form a bracket 10 body.

[0036] In this way, the main body 11 does not need to be designed with an axial hole, and the shaft 12 does not need to be assembled to the main body 11 using other accessories. There is no assembly gap between the shaft 12 and the main body 11, which can indirectly reduce the accuracy requirements for the shaft 12 and the main body 11.

[0037] There may be multiple shaft portions 12, and the multiple shaft portions 12 may be disposed on the same side of the main body 11 to be connected to the moving contact assembly 20 of the operating mechanism 100. Alternatively, the multiple shaft portions 12 may be disposed on both sides of the main body 11 to be connected to the moving contact assembly 20 and the base of the circuit breaker, respectively.

[0038] The technical solution of the present invention is to arrange the shaft portion 12 on the bracket 10 of the operating mechanism 100, the shaft portion 12 is arranged to protrude relative to the main body 11 of the bracket 10, and the shaft portion 12 and the main body 11 are metal-injected into a bracket 10 body. In this way, the bracket 10 of the operating mechanism 100 of the present invention can integrate multiple shaft portions 12 on the main body 11 of the bracket 10, and there is no need to design shaft holes, so there is no need to worry about the problem of large assembly gap between the shaft portion 12 and the main body 11, and the requirements for the accuracy of the shaft portion 12 and the main body 11 are reduced.

[0039] In one embodiment, there are multiple shaft portions 12, which are arranged at intervals and located on the same side of the main body 11, and one end of each of the multiple shaft portions 12 is fixedly connected to the main body 11;

[0040] Among them, a plurality of shaft portions 12 can be arranged on the same side of the main body portion 11, so as to be connected to the moving contact assembly 20 of the operating mechanism 100. The bracket 10 is connected to the moving contact assembly 20 through the shaft portion 12, so that the moving contact assembly 20 can rotate relative to the bracket 10, thereby facilitating the operating mechanism 100 to complete the closing and opening functions. Among them, the principle of realizing the closing and opening functions is existing, and the utility model will not elaborate on this.

[0041] Furthermore, the shaft portion 12 is directly formed on the main body portion 11 , thereby preventing the shaft portion 12 from shaking or vibrating relative to the main body portion 11 , and indirectly improving the movement stability of the operating mechanism 100 .

[0042] In order to facilitate the connection between the bracket 10 and the moving contact assembly 20, please refer to Figure 2 The moving contact assembly 20 includes an upper contact 21, a locking piece 22 and a lower contact 23. The multiple shaft portions 12 include a first shaft 121, a second shaft 122 and a third shaft 123. The second shaft 122 is located between the first shaft 121 and the third shaft 123. The first shaft 121 is movably connected to the upper contact 21, the second shaft 122 is movably connected to the locking piece 22, the third shaft 123 is movably connected to the lower contact 23, and the locking piece 22 is in contact with the upper contact 21 and the lower contact 23.

[0043] In one embodiment, the locking member 22 is located between the upper contact 21 and the lower contact 23 so as to abut against the upper contact 21 or the lower contact 23 .

[0044] The upper contact 21 is provided with a first mounting hole, and one end of the first shaft 121 away from the main body 11 is inserted into the first mounting hole, so that the first shaft 121 is movably connected to the upper contact 21, and the upper contact 21 can rotate relative to the bracket 10. The locking member 22 is provided with a second mounting hole, and one end of the second shaft 122 away from the main body 11 is inserted into the second mounting hole, so that the second shaft 122 is movably connected to the locking member 22, and the locking member 22 can rotate relative to the bracket 10. The lower contact 23 is provided with a third mounting hole, and one end of the third shaft 123 away from the main body 11 is inserted into the third mounting hole, so that the third shaft 123 is movably connected to the locking member 22, and the lower contact 23 can rotate relative to the bracket 10.

[0045] In one embodiment, the first shaft 121, the second shaft 122 and the third shaft 123 are all cylindrical in shape. The upper contact 21, the locking member 22 and the lower contact 23 of the movable contact assembly 20 are respectively mounted on the first shaft 121, the second shaft 122 and the third shaft 123 of the bracket 10.

[0046] The bracket 10 of the utility model directly forms the first shaft 121, the second shaft 122 and the third shaft 123 on the main body 11 through the metal injection molding process, and the multiple shafts 12 are integrated in the main body 11. The main body 11 does not need to be designed with multiple shaft holes, and the main body 11 does not need to be drilled, which also reduces the precision requirements for the shafts 12 and the main body 11. Because the first shaft 121, the second shaft 122 and the third shaft 123 are directly formed on the main body 11, it is not necessary to perform the assembly operation of installing the first shaft 121, the second shaft 122 and the third shaft 123 to the main body 11, thereby reducing the assembly process.

[0047] Furthermore, the first shaft 121 , the second shaft 122 and the third shaft 123 are directly formed on the main body 11 , thereby avoiding the shaking and vibration of the first shaft 121 , the second shaft 122 and the third shaft 123 on the main body 11 of the existing circuit breaker, and indirectly improving the movement stability of the operating mechanism 100 .

[0048] To prevent the upper contact 21 from being separated from the first shaft 121, see Figure 1 The first shaft 121 includes a positioning portion 1210 and a locking portion 1211 . One end of the positioning portion 1210 is fixedly connected to the main body 11 , and the other end is fixedly connected to the locking portion 1211 . The upper contact 21 is movably mounted on the positioning portion 1210 .

[0049] In one embodiment, the locking portion 1211 is disposed at one end of the positioning portion 1210 away from the main body 11 to prevent the upper contact 21 from escaping from the positioning portion 1210. The locking portion 1211 may be provided with a plurality of protrusions to prevent the upper contact 21 from escaping from the positioning portion 1210.

[0050] For further information, see Figure 1 The plurality of shaft portions 12 further include a fixed shaft 124 , which is fixedly connected to the main body portion 11 . The fixed shaft 124 is disposed close to the second shaft 122 , and an outer edge of the locking member 22 abuts against the fixed shaft 124 .

[0051] In one embodiment, the locking member 22 is movably mounted on the second shaft 122. In order to limit the rotation range of the locking member 22, a fixed shaft 124 is protruded from the main body 11, and the fixed shaft 124 is arranged close to the second shaft 122. When the locking member 22 rotates, it can contact the fixed shaft 124, and the fixed shaft 124 can prevent the locking member 22 from continuing to rotate clockwise, so as to limit the rotation range of the locking member 22.

[0052] See also Figure 1 and Figure 2 The plurality of shaft portions 12 further include a positioning shaft 125 , the positioning shaft 125 is located between the second shaft 122 and the third shaft 123 , and the positioning shaft 125 abuts against the lower contact 23 .

[0053] In one embodiment, the lower contact 23 is movably mounted on the third shaft 123. In order to limit the rotation range of the lower contact 23, a positioning shaft 125 is protruded on the main body 11, and the positioning shaft 125 is located between the second shaft 122 and the third shaft 123. Two positioning ears are provided on the top of the lower contact 23. When the lower contact 23 rotates clockwise, one of the positioning ears abuts against the positioning shaft 125, and the positioning shaft 125 can prevent the lower contact 23 from continuing to rotate clockwise. When the lower contact 23 rotates counterclockwise, the other positioning ear abuts against the positioning shaft 125, and the positioning shaft 125 can prevent the lower contact 23 from continuing to rotate counterclockwise. The positioning shaft 125 can limit the rotation range of the lower contact 23.

[0054] The bracket 10 of the present invention not only directly molds the first axis 121, the second axis 122 and the third axis 123 onto the main body 11, but also directly molds the fixing axis 124 and the positioning axis 125 onto the main body 11, thereby making the bracket 10 an integrated structure, and does not need to use bearings, screws and other parts to install multiple shafts 1 onto the main body 11, saving time and effort.

[0055] See also Figure 1 Part of the structure of the second shaft 122 is protrudingly disposed on a side of the main body 11 away from the locking member 22 .

[0056] In one embodiment, a portion of the second shaft 122 is used to be movably connected to a base on the circuit breaker, so that the bracket 10 is movably mounted on the base, and the bracket 10 can rotate relative to the base.

[0057] See also Figure 1The main body 11 is provided with a limit shaft 126 protruding from one side away from the locking member 22. The limit shaft 126 is used to be movably connected with the base on the circuit breaker. The base is provided with an arc groove at a position corresponding to the limit shaft 126, and the limit shaft 126 moves in the arc groove to limit the rotation range of the bracket 10.

[0058] In one embodiment, the limiting shaft 126 is conical in shape.

[0059] The bracket 10 of the utility model directly molds the first axis 121, the second axis 122, the third axis 123, the fixed axis 124, the positioning axis 125 and the limiting axis 126 on the main body 11 through the metal injection molding process. The main body 11 does not need to be designed with multiple axis holes, and there is no need to drill the main body 11, which also reduces the precision requirements on the axis 12 and the main body 11.

[0060] The utility model also provides a circuit breaker, which includes a base, a housing and an operating mechanism 100. The specific structure of the operating mechanism 100 refers to the above embodiment. Since the circuit breaker adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the operating mechanism 100 is installed on the base, the base is installed on the housing, the bracket 10 is rotatably installed on the base, and multiple shafts 12 are provided on the side of the bracket 10 away from the base.

[0061] The bracket 10 of the utility model is integrally formed, and a plurality of shaft portions 12 are integrated on the main body portion 11 of the bracket 10. The main body portion 11 does not need to be designed with a plurality of shaft holes, and does not need to be drilled, which also reduces the precision requirements on the shaft portions 12 and the main body portion 11. Among them, the bracket 10 of the utility model adopts the process of metal injection molding, and a plurality of shaft portions 12 are directly molded on the main body portion 11, which avoids the assembly operation of installing a plurality of shaft portions 12 on the main body portion 11, and does not need to worry about the problem of a large assembly gap between the shaft portions 12 and the main body portion 11.

[0062] Further, the bracket 10 is provided with a first shaft 121, a second shaft 122, and a third shaft 123 on one side thereof, which are movably connected to the moving contact assembly 20. The bracket 10 is provided with a limiting shaft 126 on one side thereof, which is movably connected to the base. An arc groove is provided at a position of the base corresponding to the limiting shaft 126, and the limiting shaft 126 moves in the arc groove to limit the rotation range of the bracket 10. The operating mechanism 100 is installed on the base through the bracket 10, and the moving contact assembly 20 can move on the base so as to complete the functions of closing and opening the switch.

[0063] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An operating mechanism, characterized in that: The operating mechanism comprises a bracket and a moving contact assembly, wherein the moving contact assembly is mounted on the bracket, and the bracket comprises: the main body; and A shaft portion, the shaft portion is protruding relative to the main body portion, the shaft portion is fixedly connected to the main body portion to form a bracket body; There are multiple shaft portions, which are arranged at intervals and located on the same side of the main body, and one end of each of the shaft portions is fixedly connected to the main body; The moving contact assembly includes an upper contact, a locking piece and a lower contact, the multiple shaft portions include a first shaft, a second shaft and a third shaft, the second shaft is located between the first shaft and the third shaft, the first shaft is movably connected to the upper contact, the second shaft is movably connected to the locking piece, the third shaft is movably connected to the lower contact, and the locking piece is in contact with the upper contact and the lower contact.

2. The operating mechanism according to claim 1, characterized in that: The first shaft includes a positioning portion and a locking portion, one end of the positioning portion is fixedly connected to the main body portion, and the other end is fixedly connected to the locking portion, and the upper contact is movably mounted on the positioning portion.

3. The operating mechanism according to claim 1, characterized in that: The plurality of shaft portions further include a fixed shaft, the fixed shaft is fixedly connected to the main body portion, the fixed shaft is disposed close to the second shaft, and an outer edge of the locking member abuts against the fixed shaft.

4. The operating mechanism according to claim 1, characterized in that: The plurality of shaft portions further include a positioning shaft, the positioning shaft being located between the second shaft and the third shaft, the positioning shaft being in contact with the lower contact.

5. The operating mechanism according to any one of claims 1 to 4, characterized in that: A partial structure of the second shaft is protrudingly disposed on a side of the main body away from the locking component.

6. The operating mechanism according to claim 5, characterized in that: A limiting axis is protruded from one side of the main body away from the locking member.

7. The operating mechanism according to claim 6, characterized in that: The limiting shaft is in a conical shape.

8. A circuit breaker, characterized in that: It comprises a base, a shell and an operating mechanism as described in any one of claims 1 to 7, wherein the operating mechanism is mounted on the base, the base is mounted on the shell, the bracket is rotatably mounted on the base, and the plurality of shafts are arranged on a side of the bracket away from the base.

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