Circuit breaker main shaft mounting structure and circuit breaker

Abstract

The utility model discloses a circuit breaker main shaft installation structure and a circuit breaker, the circuit breaker main shaft installation structure comprises a circuit breaker pedestal and a main shaft, two oppositely arranged supporting seats are installed on the circuit breaker pedestal, and two ends of the main shaft are respectively and rotatably connected with the two supporting seats. According to the utility model, the two ends of the main shaft are rotatably installed on the circuit breaker base through the supporting seats respectively, so that the main shaft is separated from the operating mechanism of the circuit breaker, the main shaft is effectively prevented from impacting the operating mechanism in the moving process, and the service life of the operating mechanism is prolonged; the main shaft is connected with the circuit breaker base in a two-end supporting mode through the supporting seats at the two ends, the problem of main shaft deformation caused by the counterforce effect of A / B / C three-phase contacts is effectively solved, and then the synchronism of three-phase contact action is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, concretely relates to a circuit breaker main shaft installation structure and circuit breaker. BACKGROUND

[0002] The main shaft of the frame circuit breaker of prior art is generally installed on the operating mechanism through two supporting hoops, in the circuit breaker opening process, the main shaft rotates in the supporting hoops, and the two supporting hoops are supported at the approximate middle position of the main shaft, resulting in that the two ends of the main shaft are in a suspended state, and the impact force generated in the movement process of the main shaft is large (about 10000N), the operating mechanism is prone to deformation and dislocation in the use process, causing the movement of each movement part in the operating mechanism to be jammed, and further causing the product failure risk, and the two end positions of the main shaft are prone to bending deformation under the reaction force of A / C phase contact in the use process of the circuit breaker, further causing the A / B / C three-phase contact to move out of synchronization, and affecting the performance of the circuit breaker product. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a circuit breaker main shaft installation structure, which mainly solves the technical problem that the two ends of the main shaft installed on the operating mechanism through the hoop structure are prone to bending deformation under impact.

[0004] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0005] A circuit breaker main shaft installation structure, comprising a circuit breaker base and a main shaft, two oppositely arranged supporting seats are installed on the circuit breaker base, and the two ends of the main shaft are rotatably connected to the two supporting seats.

[0006] Further, embedding holes are formed in the supporting seats, copper shaft sleeves are embedded in the embedding holes, rotating connection holes are formed in the copper shaft sleeves, and the end portions of the main shaft are rotatably connected to the rotating connection holes of the copper shaft sleeves in a fitting manner.

[0007] Further, oil storage grooves are formed in the rotating connection holes of the copper shaft sleeves.

[0008] Further, two annular oil storage grooves are formed in the inner wall of the rotating connection hole.

[0009] Further, the copper shaft sleeve comprises a nesting portion matched with the embedding hole in the supporting seat and a flange portion formed at one end of the nesting portion and used for abutting and limiting cooperation with the inner side of the supporting seat.

[0010] Further, the copper shaft sleeve is a tin bronze copper shaft sleeve or a silicon brass copper shaft sleeve.

[0011] Further, the main shaft comprises a shaft body and stepped shaft rods respectively formed at two ends of the shaft body for rotationally connecting with corresponding support seats, the outer diameter of the stepped shaft rod is smaller than that of the shaft body, and the stepped shaft rod is rotationally connected in the rotation connecting hole of the copper shaft sleeve.

[0012] Further, the support seat is configured to be locked on the circuit breaker base by bolts.

[0013] Further, a positioning slot is formed on the circuit breaker base, the support seat is partially embedded in the positioning slot to form a positioning fit, and the support seat is locked on the circuit breaker base by bolts.

[0014] Based on the same inventive concept, the utility model also provides a circuit breaker comprising the circuit breaker main shaft mounting structure of any one of the above.

[0015] The above technical scheme has the following advantages or beneficial effects:

[0016] In the circuit breaker main shaft mounting structure and the circuit breaker, the main shaft is rotatably mounted on the circuit breaker base by the support seat at two ends, thus separating the main shaft from the operating mechanism of the circuit breaker, effectively avoiding impact of the main shaft on the operating mechanism during movement, thereby being conducive to improving the service life of the operating mechanism, and the main shaft is connected with the circuit breaker base in a two-end support manner through the support seats at two ends, effectively reducing the deformation of the main shaft caused by the counterforce of the A / B / C three-phase contacts, thereby improving the synchronization of the three-phase contact action. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a three-dimensional structure exploded schematic view of the embodiment of the utility model.

[0018] Figure 2 is an assembly structure schematic view of the embodiment of the utility model.

[0019] Figure 3 is a structure schematic view of the copper shaft sleeve of the embodiment of the utility model.

[0020] Label explanation:

[0021] 1, circuit breaker base, 2, main shaft, 3, support seat, 4, copper shaft sleeve, 11, positioning slot, 21, shaft body, 22, stepped shaft rod, 41, rotation connecting hole, 42, oil storage groove, 43, nested part, 44, flange part. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings and embodiments.

[0023] In the description of the utility model, need understanding is, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore can not be understood as a limitation on the utility model.

[0024] Please refer to the accompanying drawings Figure 1 to the accompanying drawings Figure 3 , one embodiment of the utility model provides a circuit breaker spindle mounting structure, including circuit breaker base 1 (insulation base structure) and spindle 2, is installed with two opposite support seat 3 of setting on circuit breaker base 1, and the both ends of spindle 2 are rotatably connected together with two support seat 3.It can be understood that in the embodiment, the both ends of spindle 2 are rotatably installed on circuit breaker base 1 through a support seat 3, so that spindle 2 is separated from the operating mechanism of circuit breaker, effectively avoids the impact of spindle 2 on operating mechanism during movement, thereby being favorable for improving the service life of operating mechanism, and spindle 2 is connected with circuit breaker base 3 in the both end support mode through the support seat 3 of both ends, effectively reduces the deformation problem of spindle 2 caused by the counterforce of A / B / C three-phase contact, and thereby improves the synchronism of three-phase contact action.

[0025] Please refer to the accompanying drawings Figure 1 to the accompanying drawings Figure 3 , in one preferable embodiment, embedding hole is formed in support seat 3, copper bush 4 is embedded in embedding hole, rotating connection hole 41 is formed in copper bush 4, and the end of spindle 2 is rotatably connected in rotating connection hole 41 of copper bush 4.It is preferred that oil storage groove 42 is formed in rotating connection hole 41 of copper bush 4.Further, two annular oil storage grooves 42 are formed in the inner wall of rotating connection hole 41.In the embodiment, wear-resistant and oil-storing copper bush 4 is rotatably matched with the end of spindle 2, greatly reduces the frictional resistance during the rotating movement of spindle 2, reduces wear, and is favorable for improving the service life and rotating smoothness of spindle 2.Copper bush 4 includes nesting part 43 matched with embedding hole on support seat 3 and flange part 44 formed at one end of nesting part 43 for abutting and limiting cooperation with the inner side of support seat 3.Copper bush 4 is tin bronze copper bush or silicon brass copper bush.However, those skilled in the art should understand that, in other embodiments, the copper bush can also be made of other copper materials having the same or similar properties as tin bronze or silicon brass, and is not limited to the specific embodiments disclosed in the embodiment.

[0026] Please refer to the accompanying drawings Figure 1 , the accompanying drawings Figure 2In a preferred embodiment, the main shaft 2 comprises a shaft body 21 and stepped shaft rods 22 formed at both ends of the shaft body 21 for rotationally connecting with the corresponding support seat 3, the outer diameter of the stepped shaft rod 22 is smaller than that of the shaft body 21, and the stepped shaft rod 22 is rotationally connected in the rotationally connecting hole 41 of the copper sleeve 4. In this embodiment, the main shaft 2 is rotationally connected to the circuit breaker base 1 in a two-end support manner, compared with the existing support structure that uses a hoop to support the middle part of the main shaft 2, under the condition of the same shaft hole gap, the swing amount of the main shaft 2 during movement is reduced, thereby improving the stability of the main shaft 2 during high-speed movement, and further improving the product performance.

[0027] Please refer to the accompanying drawings Figure 1 , the accompanying drawings Figure 2 In a preferred embodiment, the support seat 3 is configured to be locked on the circuit breaker base 1 by bolts. The positioning groove 11 is formed on the circuit breaker base 1, the support seat 3 is partially embedded in the positioning groove 11 to form a positioning fit, and the support seat 3 is locked on the circuit breaker base 1 by bolts. In this embodiment, preferably, positioning ribs or positioning edges or other positioning structures can be arranged between the positioning groove 11 and the support seat 3 to improve the embedding positioning fit precision between the support seat 3 and the positioning groove 11.

[0028] An embodiment of the utility model also provides a circuit breaker comprising the circuit breaker main shaft mounting structure of any one of the above embodiments.

[0029] The above is only used to illustrate the technical scheme of the utility model, and is not limited thereto; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical scheme recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the utility model, therefore, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

Claims

1. A circuit breaker spindle mounting structure, characterized in that: It includes a circuit breaker base (1) and a main shaft (2). Two opposing support seats (3) are installed on the circuit breaker base (1). The two ends of the main shaft (2) are rotatably connected to the two support seats (3) respectively. The support base (3) has an insertion hole, in which a copper bushing (4) is inserted. The copper bushing (4) has a rotating connection hole (41), and the end of the main shaft (2) is rotatably connected to the rotating connection hole (41) of the copper bushing (4). An oil storage groove (42) is provided in the rotating connection hole (41) of the copper bushing (4); The support base (3) is configured to be bolted to the circuit breaker base (1); A positioning groove (11) is provided on the circuit breaker base (1). The support seat (3) is partially embedded in the positioning groove (11) to form a positioning fit, and is locked to the circuit breaker base (1) by bolts.

2. The circuit breaker spindle mounting structure according to claim 1, characterized in that: Two annular oil storage grooves (42) are provided on the inner wall of the rotating connection hole (41).

3. The circuit breaker spindle mounting structure according to claim 1, characterized in that: The copper bushing (4) includes a nested portion (43) adapted to the fitting hole on the support (3) and a flange portion (44) formed at one end of the nested portion (43) for abutting and limiting engagement with the inside of the support (3).

4. The circuit breaker spindle mounting structure according to claim 1, characterized in that: The copper bushing (4) is a copper bushing made of tin bronze or a copper bushing made of silicon brass.

5. The circuit breaker spindle mounting structure according to claim 1, characterized in that: The main shaft (2) includes a shaft body (21) and stepped shaft rods (22) formed at both ends of the shaft body (21) for rotatable connection with the corresponding support base (3). The outer diameter of the stepped shaft rod (22) is smaller than the outer diameter of the shaft body (21), and the stepped shaft rod (22) is adapted to be rotatably connected in the rotatable connection hole (41) of the copper bushing (4).

6. A circuit breaker, characterized in that: Includes the circuit breaker spindle mounting structure as described in any one of claims 1 to 5.

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