CN210575784U - Cam mechanism of circuit breaker - Google Patents
Cam mechanism of circuit breaker Download PDFInfo
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- CN210575784U CN210575784U CN201921682349.2U CN201921682349U CN210575784U CN 210575784 U CN210575784 U CN 210575784U CN 201921682349 U CN201921682349 U CN 201921682349U CN 210575784 U CN210575784 U CN 210575784U
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Abstract
The utility model provides a pair of cam mechanism of circuit breaker includes a pair of curb plate, sets up camshaft and driving lever that contacts with energy storage lever subassembly and hasp subassembly respectively between a pair of curb plate, wherein: the cam shaft is provided with a pair of cam sheets, a cam cantilever I and a cam cantilever II, two ends of the cam shaft are respectively provided with a cam fulcrum shaft, and the cam fulcrum shafts can be rotated on the pair of side plates; and is separably contacted with the locking assembly and the shifting lever. The utility model discloses an intensity that this kind of integral type cam structure has improved cam cantilever one compares prior art's axle and has increased substantially the whole operational reliability of this structure.
Description
Technical Field
The utility model belongs to the low-voltage apparatus field, more specifically relates to an operating device's of circuit breaker cam mechanism.
Background
The circuit breaker is used as a power distribution equipment and plays a role of protecting electric equipment in a power grid, namely, when a fault occurs in the power grid, such as short-circuit current or fault current, the circuit breaker breaks the current so as to protect the electric equipment and personnel safety in the power grid. In order to realize the protection function, an operating mechanism is arranged in the circuit breaker, and the moving contact and the fixed contact of the circuit breaker can be separated by controlling the movement of parts in the operating mechanism, so as to cut off a circuit, wherein a cam mechanism is usually an important part in the operating mechanism.
The cam mechanism of the circuit breaker operating mechanism in the prior art is shown in fig. 1 and 2. The pair of side plates 1 are symmetrically and fixedly connected by a plurality of fixed shafts. The driving cam plate 202 and the large cam plate 203 are fixedly connected through a plurality of shaft pins 204 to form a left cam group and a right cam group respectively, the left cam group and the right cam group are assembled into the cam component 2 through the cam fulcrum shaft grooves 201a respectively and the cam fulcrum shaft 201 in a matched mode, and the cam component 2 rotates on the pair of side plates 1 through the cam fulcrum shaft 201. The first shaft 205 is arranged on the right cam group consisting of the driving cam plate 202 and the large cam plate 204, and the first shaft sleeve 206 rotates on the first shaft 205. The energy storage lever assembly 3 is formed by symmetrically and fixedly connecting a pair of energy storage lever pieces 303 through a plurality of fixed shafts, a pair of energy storage lever bearings 301 are symmetrically fixed on the outer sides of the pair of energy storage lever pieces 303 respectively, a pair of energy storage lever fulcrum shafts 302 are symmetrically fixed on the outer sides of the pair of energy storage lever pieces 303 respectively, and the energy storage lever assembly 3 rotates on the pair of side plates 1 through the pair of energy storage lever fulcrum shafts 302. The first shaft pin 101 is fixed on the single-side plate, and the locking lever 4 rotates on the first shaft pin 101. The closing half shaft 5 rotates on the pair of side plates 1.
The state of charge completion of the prior art operating mechanism is shown in fig. 1. The energy storage lever bearing 301 is contacted with the outer contour surface 202a of the driving cam piece, one end of the locking lever 4 is contacted with the first shaft sleeve 206 of the cam assembly 2, and the other end of the locking lever 4 is contacted with the closing half shaft 5. The energy storage lever assembly 3 tends to rotate clockwise, the cam assembly 2 tends to rotate counterclockwise, and the latch lever 4 tends to rotate clockwise.
The cam component 2 is formed by assembling a left cam group and a right cam group which are composed of a cam fulcrum shaft 201, a driving cam sheet 202 and a large cam sheet 203 through a cam fulcrum shaft groove 201a in a matching mode. When the operating mechanism stores energy, the cam fulcrum shaft 201 rotates, the driving cam piece 202 and the large cam piece 203 are driven to rotate through the cam fulcrum shaft groove 201a, and the operating mechanism can have the following problems during multiple fatigue tests:
1) the stress surface of the matching part of the cam fulcrum shaft groove 201a, the driving cam piece 202 and the large cam piece 203 is small, after fatigue, the gap between the driving cam piece 202 and the large cam piece 203 and the cam fulcrum shaft groove 201a is increased, and the left cam group and the right cam group are asynchronous to form dislocation, so that the normal energy storage and release functions of the operating mechanism are influenced.
2) The cam piece fulcrum shaft 201 has a reduced strength due to the cam piece fulcrum shaft groove 201a, and the cam piece fulcrum shaft 201 is not effective after fatigue.
3) The shaft 205 of the cam module 2 is thin in diameter for reasons of construction space and is subject to failure after fatigue.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model discloses a cam mechanism of circuit breaker effectively solves thereby the asynchronous problem that forms the dislocation of left and right cam group to the operational reliability of cam structure has been improved.
In order to realize the above utility model's purpose, the utility model provides a pair of circuit breaker includes a pair of curb plate, sets up between a pair of curb plate and respectively with camshaft and the driving lever that energy storage lever subassembly and hasp subassembly contacted, wherein: the cam shaft is provided with a pair of cam sheets, a first cam cantilever and a second cam cantilever, two ends of the cam shaft are respectively provided with a cam fulcrum shaft, the cam fulcrum shafts can be rotated on the pair of side plates, and the cam fulcrum shafts and the cam sheets adopt an integrated structure.
Furthermore, the cam fulcrum shaft, the cam sheet, the first cam cantilever and the second cam cantilever adopt an integrated structure.
Further, the energy storage lever assembly is provided with an energy storage lever bearing which rotates on the pair of side plates through the pair of energy storage lever fulcrum shafts, and the energy storage lever bearing is in separable contact with the cam piece outer contour surface of the cam piece.
Further, the cam mechanism of the circuit breaker is characterized in that the locking assembly is provided with a second shaft sleeve, and the second shaft sleeve is in separable contact with the first cam cantilever of the cam piece.
Further, the cam mechanism of the circuit breaker is characterized in that the deflector rod is in separable contact with the cam cantilever II of the cam piece.
Furthermore, the pair of side plates are fixedly connected by a plurality of fixed shafts.
The utility model discloses a cam mechanism of circuit breaker has realized following technological effect:
through cam fulcrum axle among the cam subassembly with above-mentioned prior art, initiative cam piece, big cam piece, the many parts package formula structure such as axle, change the utility model discloses thereby cam fulcrum axle, cam piece, cam cantilever one, thereby the camshaft of the whole fixed knot structure (including the integral type structure) that cam cantilever two are constituteed has effectively solved prior art initiative cam piece, easily produce the clearance after the life test is tired between big cam piece and the cam fulcrum axle, thereby left side, the asynchronous problem that forms the dislocation of right cam group, the reliability of camshaft has been improved through integral type cam structure, and the intensity of cam fulcrum axle has been improved, compare prior art's cam fulcrum axle and cancelled cam fulcrum axle recess, the reliability of this axle has been improved by a wide margin. In addition, the integrated cam structure improves the strength of the cam cantilever I, and greatly improves the overall operation reliability of the structure compared with the shaft in the prior art.
Drawings
Fig. 1 is a schematic diagram of a state of energy storage completion of a circuit breaker operating mechanism of the prior art.
Figure 2 is an exploded view of a cam assembly configuration of a prior art circuit breaker operating mechanism.
Fig. 3 the utility model discloses a circuit breaker operating device energy storage process state schematic diagram.
Fig. 4 the utility model discloses a state schematic diagram is accomplished in operating device energy storage of circuit breaker.
Fig. 5 is a schematic diagram of an initial state of energy release of the circuit breaker operating mechanism.
Fig. 6 is a schematic diagram of the energy release completion state of the circuit breaker operating mechanism.
Fig. 7 is a schematic view of a camshaft structure of the operating mechanism of the present invention.
Description of reference numerals:
1: a side plate; 101: a first shaft pin; 2: a cam assembly; 201: a cam fulcrum shaft; 201 a: a cam fulcrum shaft groove; 202: an active cam plate; 202 a: an outer contour surface of the driving cam piece; 203: a large cam piece; 204: a second shaft pin; 205: a first shaft; 206: a first shaft sleeve; 3: an energy storage lever assembly; 301: an energy storage lever bearing; 302: an energy storage lever fulcrum shaft; 303: an energy storage lever plate; 4: a latch lever; 5: a switching-on half shaft; 6: a side plate; 601: a fixed shaft; 602: a fixed block; 603: a third shaft pin; 7: an energy storage lever assembly; 701: an energy storage lever bearing; 702: an energy storage lever fulcrum shaft; 703: an energy storage lever plate; 704: shaft pin four; 8: a camshaft; 81: a cam fulcrum shaft; 82: a cam piece; 82 a: an outer contour surface of the cam piece; 82 b: a cam piece groove; 83: a camshaft cantilever I; 84: a camshaft cantilever II; 9: a latch assembly; 91: a lever; 911: a lever fulcrum shaft; 912: a second shaft; 913: a second shaft sleeve; 92: a connecting rod; 921: a third shaft; 922: shaft four; 93: a latch lever; 931: a latch lever fulcrum shaft; 10: a switching-on half shaft; 11: a spring; 12: a deflector rod.
Detailed Description
The cam mechanism of the circuit breaker of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 3 to 5, the present invention provides a cam mechanism of a circuit breaker, which comprises a pair of side plates 6, a cam shaft 8 and a shift lever 12, wherein the cam shaft 8 is disposed between the pair of side plates 6 and contacts with an energy storage lever assembly 7 and a latch assembly 9 respectively. The pair of side plates 6 are fixedly connected by a plurality of fixed shafts 601, the pair of fixed blocks 602 are respectively and symmetrically fixed at the inner sides of the pair of side plates 6, and the third shaft pin 603 is fixed on the unilateral side plate 6.
The energy storage device comprises a pair of side plates 6, an energy storage lever assembly 7 arranged between the pair of side plates 6, a cam shaft 8, a locking assembly 9, a closing half shaft 10, a spring 11 and a shifting lever 12.
In this embodiment, the energy storage lever assembly 7 of the circuit breaker is symmetrically and fixedly connected by a pair of energy storage lever pieces 703 through a plurality of fixed shafts, a pair of energy storage lever bearings 701 are respectively and symmetrically fixed on the outer sides of the pair of energy storage lever pieces 703, a pair of energy storage lever fulcrum shafts 702 are respectively and symmetrically fixed on the outer sides of the pair of energy storage lever pieces 703, and a shaft pin four 704 is fixed on the pair of energy storage lever pieces 703. The charge lever assembly 7 pivots on the pair of side plates 6 via a pair of charge lever fulcrum shafts 702.
The camshaft 8 (see fig. 7) includes a fulcrum shaft 81, a cam piece 82, a cam piece outer contour surface 82a, a cam piece groove 82b, a camshaft suspension arm one 83, and a camshaft suspension arm two 84. The cam shaft 8 is rotated on the pair of side plates by the cam fulcrum shaft 81. The energy storage lever bearing 701 is in separable contact with the cam piece outer contour surface 82a of the cam piece 82.
In this embodiment, the latch assembly 9 of the circuit breaker includes a lever 91, a link 92, and a latch lever 93. The lever 91 is pivoted on a lever fulcrum shaft 911, and the lever fulcrum shaft 911 is pivoted on the pair of side plates 6. The second shaft 912 is fixed on the lever 91, and the second shaft sleeve 913 rotates on the second shaft 912. One end of the lever 91 is hinged to one end of the link 92 through the third shaft 921. The latch lever 93 rotates on a latch lever fulcrum shaft 931, and the latch lever fulcrum shaft 931 rotates on the pair of side plates 6. The other end of the link 92 is hinged to one end of the latch lever 93 via shaft four 922. The closing half shaft 10 rotates on the pair of side plates 6, and one end surface of the latch lever 93 is in separable contact with the closing half shaft. The second sleeve 913 is in separable contact with the first cam arm 83.
The shift lever 12 rotates on the axle pin three 603, and the spring 11 is mounted on the axle pin three 603, and has a clockwise (clockwise in fig. 5 and 6) restoring force for the shift lever 12. The end of the toggle lever 12 is in separable contact with the second cam bracket 84.
The utility model provides a further description below provides a cam mechanism's of circuit breaker working method:
in this embodiment, when the cam shaft 8 rotates clockwise as shown in fig. 3 during charging of the operating mechanism of the circuit breaker, the cam plate outer contour surface 82a contacts the charging lever bearing 701 to drive the charging lever assembly 7 to rotate counterclockwise. When the first cam cantilever 83 contacts with the second sleeve 913 of the locking assembly 9, the cam shaft 8 stops rotating, one end surface of the locking lever 93 contacts with the closing half shaft, and the operating mechanism reaches the energy storage completion state, as shown in fig. 4.
The initial state of the release of the actuator is shown in figure 5. The cam shaft 8 tends to rotate clockwise, the charge lever assembly 7 tends to rotate clockwise, and the charge lever bearing 701 tends to separate from the cam lobe outer contour surface 82 a.
When the energy storage lever 7 rotates clockwise, the cam shaft 8 rotates clockwise at the same time, the energy storage lever bearing 701 disengages from the cam piece outer contour surface 82a, the energy storage lever assembly 7 stops rotating after the fourth shaft pin 704 contacts the fixed block 602, the second cam cantilever 84 contacts the end of the shift lever 12, the cam shaft 8 stops rotating under the clockwise (clockwise in fig. 5 and 6) resetting force of the spring 11 on the shift lever 12, the energy storage lever bearing 701 falls above the cam piece groove 82b, and the operating mechanism reaches the energy release completion state shown in fig. 6.
Through the above description, it can be seen that the utility model discloses a cam mechanism of circuit breaker changes through many parts package formula structures such as cam fulcrum axle 201 in cam subassembly 2 with prior art, initiative cam piece 202, big cam piece 203, axle 205 the utility model discloses thereby cam fulcrum axle 81, cam piece 82, cam cantilever 83, the whole fixed knot that cam cantilever two 84 constitutes constructs (including the integral type structure) camshaft 8 has effectively solved and has easily produced the clearance after the life test is tired between prior art initiative cam piece 202, big cam piece 203 and the cam fulcrum axle 201, thereby left and right cam group is asynchronous forms the problem of dislocation, has improved camshaft 8's reliability through the integral type cam structure to the intensity of cam fulcrum axle 81 has been improved. Thus, compared with the cam fulcrum shaft 201 in the prior art, the cam fulcrum shaft groove 201a is eliminated, and the reliability of the shaft is greatly improved. Moreover, the integrated cam structure improves the strength of the cam cantilever I83, greatly improves the overall operation reliability of the structure compared with the shaft 205 in the prior art, and ensures the durability of the working reliability of the circuit breaker operating mechanism.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will understand that modifications and equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of them shall fall within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a cam mechanism of circuit breaker, its characterized in that, it includes a pair of curb plate (6), sets up between a pair of curb plate (6) and cam axle (8) and driving lever (12) that contact with energy storage lever subassembly (7) and hasp subassembly (9) respectively, wherein: the cam shaft (8) is provided with a pair of cam sheets (82), a first cam cantilever (83) and a second cam cantilever (84), two ends of the cam shaft (8) are respectively provided with a cam fulcrum shaft (81), the cam fulcrum shafts (81) can be rotated on a pair of side plates, and the cam fulcrum shafts (81) and the cam sheets (82) adopt an integrated structure.
2. The cam mechanism of circuit breaker according to claim 1, wherein the fulcrum shaft (81), the cam piece (82), the first cam arm (83) and the second cam arm (84) are of an integral structure.
3. A cam mechanism of a circuit breaker according to claim 1, wherein said energy storage lever assembly (7) is provided with an energy storage lever bearing (701) which is rotated on a pair of side plates (6) through a pair of energy storage lever fulcrum shafts (702), said energy storage lever bearing (701) being in detachable contact with a cam piece outer contour surface (82a) of said cam piece (82).
4. The cam mechanism of circuit breaker according to claim 1, wherein said latch assembly (9) is provided with a second bushing (913), said second bushing (913) being in detachable contact with said first cam cantilever (83) of said cam piece (82).
5. The cam mechanism of circuit breaker according to claim 1, wherein said lever (12) is in separable contact with a second cam arm (84) of said cam plate (82).
6. The cam mechanism of circuit breaker according to claim 1, characterized in that said pair of side plates (6) are fixedly connected by a plurality of fixed shafts (601).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921682349.2U CN210575784U (en) | 2019-09-30 | 2019-09-30 | Cam mechanism of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921682349.2U CN210575784U (en) | 2019-09-30 | 2019-09-30 | Cam mechanism of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210575784U true CN210575784U (en) | 2020-05-19 |
Family
ID=70635110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921682349.2U Active CN210575784U (en) | 2019-09-30 | 2019-09-30 | Cam mechanism of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210575784U (en) |
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2019
- 2019-09-30 CN CN201921682349.2U patent/CN210575784U/en active Active
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