Main shaft mounting structure for two-pole circuit breaker

Abstract

The utility model relates to a main shaft mounting structure for a two-pole circuit breaker, the main shaft mounting structure is used for the circuit breaker, the circuit breaker comprises a shell, an operating mechanism and a main shaft, the operating mechanism comprises a first side plate and a second side plate which are symmetrically fixed at the front end of the shell, the first side plate is located at the side edge of the front end of the shell, and the main shaft penetrates through the first side plate and the second side plate; the mounting structure comprises a first hoop which comprises a first panel arranged on the first surface of a first side plate; the first cylinder body is arranged on the second surface of the first panel and is clamped with the rear end of the first side plate; the first through hole is cylindrical, penetrates through the first panel and the first barrel and is arranged on the outer side of the main shaft in a sleeving manner; and the first fastening piece sequentially penetrates through the first side plate and the first panel, fixes the first panel and the first side plate together and limits circumferential movement of the first hoop relative to the first side plate, the main shaft penetrates through the first through hole and limits circumferential movement of the first end of the main shaft, and the effect of positioning the center of the first end of the main shaft is good.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a main shaft mounting structure for a two-pole circuit breaker. Background Art

[0002] As transformer capacity continues to increase, the requirements for short-term withstand performance of circuit breakers are becoming increasingly stringent. When subjected to high currents, some components within the circuit breaker, such as the main shaft, may experience significant deformation, ultimately affecting circuit breaker performance and even causing accidents. Therefore, a reliable main shaft mounting method is required.

[0003] The two-pole circuit breaker includes a housing, an operating mechanism, and a main shaft. The operating mechanism includes a first side plate and a second side plate symmetrically fixed to the front end of the housing. The main shaft passes through the first and second side plates, and the main shaft is fixedly connected to the first and second side plates by a split clamp. The portion of the main shaft exposed from the second side plate is longer and can pass through the mounting bracket fixed to the front end of the housing to position the main shaft. Since an auxiliary switch needs to be set on the right side of the front end of the housing of the two-pole circuit breaker, the first side plate can only be set on the left side of the front end of the housing, so that there is no space for setting the mounting bracket on this side. If a split clamp is used to fix the main shaft and the first side plate, there is a gap at the connection between the upper and lower clasping structures of the split clamp, the center positioning effect of the main shaft is poor, and there is still a possibility of large deformation of the main shaft, and the installation strength of the main shaft cannot be guaranteed.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Utility Model Content

[0005] In view of the deficiencies in the prior art, an embodiment of the present utility model discloses a main shaft mounting structure for a two-pole circuit breaker, so as to solve the problem of insufficient mounting strength of the main shaft mounting structure for a two-pole circuit breaker.

[0006] The technical solutions adopted in this utility model are as follows:

[0007] A spindle mounting structure for a two-pole circuit breaker is used for a circuit breaker, the circuit breaker comprising a housing, an operating mechanism and a spindle, the operating mechanism comprising a first side plate and a second side plate symmetrically fixed to the front end of the housing, the first side plate being located on the side of the front end of the housing, and the spindle passing through the first side plate and the second side plate; the mounting structure comprising: a first clamp, comprising: a first panel, arranged on the first surface of the first side plate; a first cylinder, arranged on the second surface of the first panel, and clamped with the rear end of the first side plate; a first through hole, which is cylindrical, passes through the first panel and the first cylinder, and is sleeved on the outside of the spindle; a first fastener, which passes through the first side plate and the first panel in sequence and fixes the first panel and the first side plate together.

[0008] Its further technical solution is that the main shaft includes: a cantilever, which is arranged on the main shaft between the first side plate and the second side plate and the second surface of the second side plate; the mounting structure also includes a second clamp, and the second clamp has two, including: a second cylinder, which is a semi-cylindrical cylinder; a second panel, which is arranged on the outside of the second panel; a second through hole, which is semi-cylindrical and passes through the cross-section of the second cylinder; a second fastener; wherein, the two second clamps are flipped symmetrically relative to the cross-section of the second cylinder, the two second through holes are spliced together for the main shaft to pass through, the two second cylinders are spliced together and clamped with the rear end of the second side plate, the two second panels are respectively located on both sides of the second side plate, and the second fastener passes through the two second panels and the second side plate and fixes the two second panels and the second side plate together.

[0009] A further technical solution is that the second surface of the first cylinder and the first panel of the second cylinder respectively abut against the side surfaces of the cantilever.

[0010] Its further technical solution is that the first side plate and the second side plate include: a first groove, which is respectively opened at the rear end of the first side plate and the second side plate, including a semicircular groove and a square groove connected to the rear end of the semicircular groove; wherein, the first cylinder is inserted into the semicircular groove, the outer side of the second cylinder has an arc surface and a plane connected to the arc surface, the parts of the two second cylinders corresponding to the arc surface are inserted into the semicircular groove, and the parts of the two second cylinders corresponding to the plane are inserted into the square groove.

[0011] A further technical solution is that a second groove is opened on the second panel, and the second fastener includes a lag screw and a second nut. The lag screw is stuck in the second groove and passes through the two second panels and the second side panel, and the second nut is threadedly connected to the lag screw.

[0012] Its further technical solution is that the mounting structure also includes a mounting frame, and the mounting frame includes: a first plate, which is arranged perpendicular to the main shaft; a third groove, which is opened on the first plate and is arc-shaped, with a central angle greater than 180°, for the main shaft to pass through; a second plate, which is fixed to the front end of the shell and connected to the first plate on the side; a fourth groove, which is opened on the second plate, is square and connected to the third groove for the main shaft to extend into.

[0013] A further technical solution is that the shell includes: a fifth groove, which is opened at the front end of the shell and is used for the first hoop, the second hoop and the cantilever to extend into.

[0014] A further technical solution is that the first fastener includes a first screw and a first nut, the first screw passes through the first side plate and the first panel in sequence, and the first nut is threadedly connected to the first screw.

[0015] The beneficial effects of the embodiments of the present utility model are as follows:

[0016] (1) The utility model is a two-pole circuit breaker spindle mounting structure for use in a two-stage circuit breaker. The circuit breaker includes a housing, an operating mechanism, and a spindle. The operating mechanism includes a first side plate and a second side plate symmetrically fixed to the front end of the housing. The mounting structure includes a first clamp and a first fastener. The first fastener sequentially passes through the first side plate and the first panel of the first clamp and fixes the first panel and the first side plate together. At the same time, the first cylinder of the first clamp is clamped and fixed to the rear end of the first side plate to limit the circumferential movement of the first clamp relative to the first side plate. The spindle passes through the first through hole to limit the circumferential movement of the first end of the spindle, effectively positioning the center of the first end of the spindle, and providing high spindle mounting strength.

[0017] (2) Furthermore, the mounting structure also includes a mounting frame, which includes a first plate and a second plate. The first plate is arranged perpendicular to the main shaft, and the second plate is fixed to the front end of the shell and is connected to the first plate on the side. A third arc-shaped groove is provided on the first plate for the main shaft to pass through. The central angle of the third groove is greater than 180°, which can limit the circumferential movement of the second end of the main shaft and prevent the main shaft from falling out of the third groove, thereby having a good effect on the center positioning of the second end of the main shaft. A fourth square groove is provided on the second plate, which is connected to the third groove and is provided for the main shaft to extend into to avoid interference with the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an axonometric drawing of the circuit breaker and main shaft mounting structure of the present invention.

[0019] Figure 2 This is an axonometric drawing of the operating mechanism and main shaft mounting structure of the utility model.

[0020] Figure 3 This is an axonometric view of the first side plate, the first hoop and the first fastener of the present invention.

[0021] Figure 4 This is an axonometric view of the first clamp in the main shaft mounting structure for a two-pole circuit breaker of the utility model.

[0022] Figure 5 This is an axonometric view of the second clamp in the main shaft mounting structure for a two-pole circuit breaker of the utility model.

[0023] Figure 6 This is an axonometric view of the second side plate, second hoop and second fastener of the present invention.

[0024] Figure 7 This is an axonometric view of the first side panel and the second side panel of the present invention.

[0025] Figure 8 It is an axonometric drawing of the mounting bracket of the present utility model.

[0026] In the picture:

[0027] 1. Shell; 11. Fifth groove; 2. Operating mechanism; 21. First side panel; 211. First groove; 22. Second side panel; 3. Main shaft; 31. Cantilever; 4. First clamp; 41. First panel; 42. First cylinder; 43. First through hole; 5. Second clamp; 51. Second panel; 511. Second groove; 52. Second cylinder; 53. Second through hole; 6. Mounting bracket; 61. First plate; 62. Third groove; 63. Second plate; 64. Fourth groove; 7. First screw; 8. Square head screw DETAILED DESCRIPTION

[0028] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the device proposed in the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0030] Example:

[0031] This embodiment discloses a main shaft mounting structure for a two-pole circuit breaker.

[0032] like Figure 1As shown, the spindle 3 mounting structure is used in a circuit breaker, which includes a housing 1, an operating mechanism 2, and a spindle 3. The operating mechanism 2 includes a first side plate 21 and a second side plate 22 symmetrically fixed to the front end of the housing 1. The first side plate 21 is located on the side of the front end of the housing 1, and the spindle 3 passes through the first and second side plates 21, 22. Exemplarily, the first and second side plates 21, 22 are perpendicularly arranged at the front end of the housing 1. The rear side surfaces of the first and second side plates 21, 22 have bent sheet metal screws connected to the housing 1. The spindle 3 passes perpendicularly through the first and second side plates 21, 22.

[0033] like Figure 2 As shown, the main shaft 3 further includes a cantilever 31, which is provided on the main shaft 3 between the first side plate 21 and the second side plate 22 and on the second surface of the second side plate 22. Specifically, three cantilevers 31 are provided on the main shaft 3 between the first side plate 21 and the second side plate 22, and one cantilever 31 is provided on the main shaft 3 on the second surface of the second side plate 22.

[0034] like Figure 3 and Figure 4 As shown, the mounting structure includes a first clamp 4 and a first fastener. The first clamp 4 includes a first panel 41, a first cylinder 42 and a first through hole 43. The first panel 41 is arranged on the first surface of the first side panel 21. The first cylinder 42 is arranged on the second surface of the first panel 41 and is clamped with the rear end of the first side panel 21. The first through hole 43 is cylindrical, passes through the first panel 41 and the first cylinder 42, and is sleeved on the outside of the main shaft 3. The first fastener passes through the first side plate 21 and the first panel 41 in sequence and fixes the first panel 41 and the first side plate 21 together. Exemplarily, the outer diameter of the first panel 41 is larger than the outer diameter of the first cylinder 42. The first fastener includes a first screw 7 and a first nut, the first screw 7 passes through the first side plate 21 and the first panel 41 in sequence, and the first nut is threadedly connected to the first screw 7.

[0035] like Figure 5 and Figure 6 As shown, the mounting structure also includes a second clamp 5 and a second fastener. There are two second clamps 5, including a second panel 51, a second cylinder 52 and a second through hole 53. The second cylinder is a semi-cylinder. The second panel 51 is arranged on the outside of the second cylinder 52. The second through hole 53 is semi-cylindrical and passes through the cross-section of the second cylinder 52. Among them, the two second clamps 5 are flipped symmetrically relative to the cross-section of the second cylinder 52, and the two second through holes 53 are spliced into a cylindrical shape for the main shaft 3 to pass through. The two second cylinders 52 are spliced and clamped with the rear end of the second side plate 22. The two second panels 51 are respectively located on both sides of the second side plate 22. The second fastener passes through the two second panels 51 and the second side plate 22 and fixes the two second panels 51 and the second side plate 22 together.

[0036] like Figure 7As shown, exemplarily, the first side plate 21 and the second side plate 22 include a first groove 211, and the first groove 211 is respectively opened at the rear end of the first side plate 21 and the second side plate 22, including a semicircular groove and a square groove connected to the rear end of the semicircular groove. Among them, the first cylinder 42 is inserted into the semicircular groove, and the outer side of the second cylinder 52 has an arc surface and a plane connected to the arc surface. The arc surface is concentric with the second through hole 53, and the corresponding central angle is 90°. The parts of the two second cylinders 52 corresponding to the arc surface are inserted into the semicircular groove, and the parts of the two second cylinders 52 corresponding to the plane are inserted into the square groove. The first fastener limits the circumferential movement and axial movement of the first clamp 4 relative to the main shaft 3, and the first through hole 43 limits the circumferential movement of the main shaft 3. The second fastener and the second side plate 22 limit the circumferential movement and axial movement of the second clamp 5 relative to the second side plate 22, and the two second through holes 53 hold the main shaft 3 to limit the circumferential movement of the main shaft 3.

[0037] Preferably, the first fastener and the second fastener are both located at the front end of the first groove 211, and can withstand the maximum force to prevent the main shaft 3, the first clamp 4 and the second clamp 5 from escaping from the first groove 211, and have the best fixing effect on the first clamp 4 and the second clamp 5.

[0038] like Figure 6 As shown, further, a second groove 511 is opened on the second panel 51, and the second fastener includes a lag screw 8 and a second nut. The lag screw 8 is stuck in the second groove 511 and passes through the two second panels 51 and the second side panel 22. The second nut is threadedly connected to the lag screw 8. The second groove 511 prevents the lag screw 8 from loosening when the second clamp 5 vibrates, and at the same time facilitates the second nut to be tightened on the lag screw 8.

[0039] like Figure 2 As shown, further, the second surface of the first cylinder 42 and the first surface of the second cylinder 52 respectively press against the side surfaces of the cantilever 31 to limit the axial movement of the main shaft 3.

[0040] like Figure 8 As shown, further, the mounting structure also includes a mounting frame 6, and the mounting frame 6 includes a first plate 61, a third groove 62, a second plate 63 and a fourth groove 64. The first plate 61 is arranged perpendicular to the main shaft 3. The third groove 62 is opened on the first plate 61, and is arc-shaped, with a central angle greater than 180°, for the main shaft 3 to pass through, limiting the circumferential movement of the second end of the main shaft 3, and preventing the main shaft 3 from escaping from the third groove 62, and having a good effect on the center positioning of the second end of the main shaft 3. The second plate 63 is fixed to the front end of the shell 1 and is connected to the first plate 61 on the side. The fourth groove 64 is opened on the second plate 63, is square, and is connected to the third groove 62, for the main shaft 3 to extend into, to avoid interference with the main shaft 3.

[0041] like Figure 1As shown, further, the housing 1 includes a fifth groove 11, which is opened at the front end of the housing 1 for the first clamp 4, the second clamp 5 and the cantilever 31 to extend into.

[0042] In this embodiment, the first fastener passes through the first side plate 21 and the first panel 41 in sequence and fixes the first panel 41 and the first side plate 21 together, and at the same time, the first cylinder 42 is clamped and fixed to the rear end of the first side plate 21 to limit the circumferential movement of the first clamp 4 relative to the first side plate 21. The main shaft 3 passes through the first through hole 43 to limit the circumferential movement of the first end of the main shaft 3, which has a good effect on the center positioning of the first end of the main shaft 3 and has a high installation strength of the main shaft 3.

[0043] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A main shaft mounting structure for a two-pole circuit breaker, characterized in that: Used for a circuit breaker, the circuit breaker includes a housing, an operating mechanism and a main shaft, the operating mechanism includes a first side plate and a second side plate symmetrically fixed to the front end of the housing, the first side plate is located on the side of the front end of the housing, and the main shaft passes through the first and second side plates; the mounting structure includes: The first clamp includes: a first panel, disposed on a first surface of the first side panel; A first cylinder is provided on the second surface of the first panel and is clamped with the rear end of the first side panel; The first through hole is cylindrical, passes through the first panel and the first cylinder, and is sleeved on the outside of the main shaft; The first fastener passes through the first side panel and the first panel in sequence and fixes the first panel and the first side panel together.

2. The main shaft mounting structure for a two-pole circuit breaker according to claim 1, characterized in that: The main shaft comprises: A cantilever is provided on the main shaft between the first side plate and the second side plate and the second the second side of the side panel; The mounting structure further includes two second hoops, including: The second cylinder is a semi-cylinder; a second panel, disposed on an outer side of the second panel; a second through hole, which is semi-cylindrical and passes through the cross section of the second cylinder; a second fastener; Among them, the two second hoops are flipped symmetrically relative to the cross-section of the second cylinder, the two second through holes are spliced together for the main shaft to pass through, the two second cylinders are spliced together and clamped with the rear end of the second side plate, the two second panels are respectively located on both sides of the second side plate, and the second fastener passes through the two second panels and the second side plate and fixes the two second panels and the second side plate together.

3. The main shaft mounting structure for a two-pole circuit breaker according to claim 2, characterized in that: The second surface of the first cylinder and the first surface of the second cylinder respectively abut against the side surfaces of the cantilever.

4. The main shaft mounting structure for a two-pole circuit breaker according to claim 2, characterized in that: The first side panel and the second side panel include: First grooves are respectively provided at the rear ends of the first side plate and the second side plate, and include a semicircular groove and a square groove connected to the rear ends of the semicircular grooves; Among them, the first cylinder is inserted into the semicircular groove, the outer side of the second cylinder has an arc surface and a plane connected to the arc surface, the parts of the two second cylinders corresponding to the arc surface are inserted into the semicircular groove, and the parts of the two second cylinders corresponding to the plane are inserted into the square groove.

5. The main shaft mounting structure for a two-pole circuit breaker according to claim 2, characterized in that: The second panel is provided with a second groove, and the second fastener includes a lag screw and a second nut. The lag screw is inserted into the second groove and passes through the two second panels and the second side panel, and the second nut is threadedly connected to the lag screw.

6. The main shaft mounting structure for a two-pole circuit breaker according to claim 1, characterized in that: The mounting structure further includes a mounting frame, and the mounting frame includes: a first plate, arranged perpendicular to the main axis; a third groove, provided on the first plate, in an arc shape with a central angle greater than 180°, for the main shaft to pass through; a second plate, fixed to the front end of the housing and connected to the first plate at the side; The fourth groove is provided on the second plate, is square in shape, is communicated with the third groove, and is for the main shaft to extend into.

7. The main shaft mounting structure for a two-pole circuit breaker according to claim 2, characterized in that: The housing comprises: A fifth groove is provided at the front end of the shell for the first hoop, the second hoop and the cantilever to extend into.

8. The main shaft mounting structure for a two-pole circuit breaker according to claim 1, characterized in that: The first fastener includes a first screw and a first nut. The first screw passes through the first side plate and the first panel in sequence. The first nut is threadedly connected to the first screw.

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