CN211376561U - Camshaft supporting structure of circuit breaker operating mechanism - Google Patents
Camshaft supporting structure of circuit breaker operating mechanism Download PDFInfo
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- CN211376561U CN211376561U CN201921704113.4U CN201921704113U CN211376561U CN 211376561 U CN211376561 U CN 211376561U CN 201921704113 U CN201921704113 U CN 201921704113U CN 211376561 U CN211376561 U CN 211376561U
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Abstract
The utility model provides a circuit breaker operating device camshaft bearing structure includes a pair of curb plate, sets up camshaft between a pair of curb plate, its characterized in that still contains a pair of bearing, a pair of bearing is installed respectively on a pair of curb plate, the both ends of camshaft are in a pair of bearing internal rotation to the life of improvement bearing that can be very big strengthens operating device's camshaft bearing structure's reliability.
Description
Technical Field
The utility model relates to a low-voltage apparatus field, concretely relates to operating device camshaft bearing structure of circuit breaker.
Background
In the electrical and electrical industry, a circuit breaker is used as a power distribution equipment to protect electrical equipment in a power grid, that is, when a fault occurs in the power grid, such as a short-circuit current or a fault current, the circuit breaker breaks the current to protect the electrical equipment and personnel 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 static contact of the circuit breaker can be separated by controlling the movement of parts in the operating mechanism, so that a circuit is cut off, wherein the camshaft supporting structure is an important component in the whole force transmission.
The camshaft support structure of the prior art operating mechanism 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 cam component 2 is formed by fixedly connecting a cam fulcrum shaft 21 and a cam sheet 22. The first bearing seat outer circular surfaces 4d of the pair of bearing seats 4 are respectively in matched contact with the first side plate hole inner walls 1a of the pair of side plates 1, and the third bearing seat end surfaces 4e of the pair of bearing seats 4 are respectively in matched contact with the first side plate inner side surfaces 1b of the pair of side plates 1. The bearing outer circular surfaces 3a of the pair of bearings 3 are respectively in matching contact with the bearing seat inner hole surfaces 4a of the pair of bearing seats 4, and the bearing end surfaces 3b of the pair of bearings 3 are respectively in matching contact with the bearing seat end surfaces 4b of the pair of bearing seats 4. Two ends of a cam fulcrum shaft 21 of the cam module 2 are respectively in rotating contact with a first bearing inner hole surface 3c of the pair of bearings 3, two ends of a cam piece outer side surface 22a of the cam module 2 are respectively in matching contact with a second bearing seat end surface 4c of the pair of bearing seats 4, and the cam module 2 is axially limited by the bearing seats 4. The fulcrum shaft 21 of the cam member 2 passes through but does not contact the inner walls 4f of the bearing housing holes of the pair of bearing housings 4.
Because when the operating mechanism normally stores and releases energy, the cam component 2 receives a large force and can be transmitted to the pair of bearings 3 through the cam fulcrum shaft 21, the bearings 3 in the prior art use oil-retaining bearings or copper shaft sleeves, the materials of the bearings are copper-based alloy or copper alloy, the fatigue resistance strength is not high, and when the operating mechanism is subjected to multiple fatigue tests, the bearings 3 are easy to damage, and the normal energy storage and release functions of the operating mechanism can be influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a circuit breaker operating device camshaft bearing structure to make operating device's camshaft bearing structure life and operational reliability promote by a wide margin.
In order to realize the purpose of the utility model, the utility model provides a circuit breaker operating device camshaft bearing structure includes a pair of curb plate, sets up camshaft between a pair of curb plate, its characterized in that still contains a pair of bearing, a pair of bearing is installed respectively on a pair of curb plate, the both ends of camshaft are in a pair of bearing internal rotation.
Further, the bearing is a flange bearing, the flange bearing comprises a flange bearing outer circular surface, a flange bearing end surface I, a flange bearing end surface II and a flange bearing inner hole surface, wherein the flange bearing outer circular surface is in contact with a side plate hole inner wall II of the side plate, the flange bearing end surface I is in contact with a side plate inner side surface II of the side plate, the flange bearing end surface II is in contact with a cam shaft end surface of the cam shaft, and the flange bearing inner hole surface is in rotating contact with a cam fulcrum shaft of the cam shaft.
Further, the bearing comprises a second bearing outer circular surface, a second bearing end surface, a third bearing end surface and a second bearing inner hole surface, the side plate is provided with a third side plate inner hole surface, a side plate end surface and a third side plate inner hole wall, the second bearing outer circular surface is in contact with the side plate inner hole surface, the second bearing end surface is in contact with the side plate end surface, the third bearing end surface is in contact with the cam shaft end surface of the cam shaft, and the second bearing inner hole surface is in rotational contact with the cam fulcrum shaft of the cam shaft.
The cam fulcrum shaft is characterized by further comprising a bearing seat, wherein the bearing seat comprises a bearing seat end face four, a bearing seat end face five, a bearing seat outer circular face two and a bearing seat end face six, the bearing seat outer circular face two is in contact with the bearing seat inner hole face two, the bearing seat end face two is in contact with the bearing seat end face four, the bearing seat inner hole face two is in rotating contact with the cam fulcrum shaft, the bearing seat end face five is in contact with the cam shaft end face, the bearing seat outer circular face two is in contact with the side plate hole inner wall four, and the bearing seat end face six is in contact with the side plate inner side face three.
Still further, the flange bearing is a ball bearing.
Still further, the flange bearing is a needle bearing.
Still further, the bearing is a ball bearing.
Still further, the bearing is a needle bearing.
Furthermore, the pair of side plates are fixedly connected by a plurality of fixed shafts.
The utility model provides a pair of circuit breaker operating device camshaft bearing structure has effectively solved prior art's defect, and has reached following technological effect:
because the bearing that is easy to damage after fatigue among the prior art is changed into ball bearing or needle bearing to multiple mounting structure is provided: the device comprises a flange bearing limiting installation structure, a side plate forming limiting installation structure and a bearing seat limiting installation structure. Because the bearing strength of the ball bearing or the needle bearing is very high, the service life of the bearing can be greatly prolonged, and the reliability of the camshaft supporting structure of the operating mechanism is enhanced.
Drawings
Fig. 1 is an exploded view of a prior art operating mechanism cam assembly mounting arrangement.
Fig. 2 is a schematic view of a bearing seat and bearing structure of a prior art operating mechanism.
Fig. 3 is an exploded view of a mounting structure of a camshaft of an operating mechanism according to a first embodiment of the present invention.
Fig. 4 is a schematic view of a bearing structure of an operating mechanism according to the first embodiment of the present invention.
Fig. 5 is an exploded view of the mounting structure of the operating mechanism camshaft according to the second embodiment of the present invention.
Fig. 6 is a schematic side plate structure of an operating mechanism according to the second embodiment of the present invention.
Fig. 7 is a schematic view of a bearing structure of an operating mechanism according to the second embodiment of the present invention.
Fig. 8 is an exploded view of the mounting structure of the operating mechanism camshaft according to the third embodiment of the present invention.
Fig. 9 is a schematic view of a bearing seat and a bearing structure of an operating mechanism according to a third embodiment of the present invention.
Description of reference numerals:
1: a side plate; 1 a: the inner wall of the side plate hole is I; 1 b: the inner side surface I of the side plate; 2: a cam assembly; 21: a cam fulcrum shaft; 22: a cam piece; 22 a: the outer side surface of the cam sheet; 3: a bearing; 3 a: a first outer circular surface of the bearing; 3 b: a first bearing end surface; 3 c: a first bearing inner hole surface; 4: a bearing seat; 4 a: a first inner hole surface of the bearing seat; 4 b: a first end face of the bearing seat; 4 c: a second end surface of the bearing seat; 4 d: a first outer circular surface of the bearing seat; 4 e: a third end surface of the bearing seat; 4 f: a first bearing seat hole inner wall; 5: a side plate; 5 a: a second inner wall of the side plate hole; 5 b: the inner side face II of the side plate; 6: a camshaft; 61: a cam fulcrum shaft; 61 a: an end face of the camshaft; 62: a cam piece; 7: a flange bearing; 7 a: the outer circular surface of the flange bearing; 7 b: the flange bearing end face I; 7 c: a second flange bearing end surface; 7 d: a flange bearing bore surface; 8: a side plate; 8 a: the inner hole surface of the side plate; 8 b: end faces of the side plates; 8 c: a third inner wall of the side plate hole; 9: a bearing; 9 a: a second bearing outer circular surface; 9 b: a second bearing end surface; 9 c: a third bearing end surface; 9 d: a second bearing inner hole surface; 10: a side plate; 10 a: the inner wall of the side plate hole is four; 10 b: the inner side surface III of the side plate; 11: a bearing seat; 11 a: a second bearing seat inner hole surface; 11 b: the end surface of the bearing seat is IV; 11 c: a fifth bearing seat end surface; 11 d: a second outer circular surface of the bearing seat; 11 e: bearing seat end face six; 11 f: and a second bearing seat hole inner wall.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The first embodiment is as follows:
in this embodiment, the present invention provides a camshaft support structure for a circuit breaker operating mechanism, which is a flange bearing limit mounting structure, and includes a pair of side plates 5, a camshaft 6 and a flange bearing 7 disposed between the pair of side plates 5.
As shown in fig. 3 and 4, the pair of side plates 5 of the present embodiment are symmetrically and fixedly connected by a plurality of fixed shafts. The camshaft 6 is composed of a cam fulcrum shaft 61 and a cam piece 62. The flange bearing outer circular surfaces 7a of the pair of flange bearings 7 are respectively in matched contact with the side plate hole inner walls two 5a of the pair of side plates 5, and the flange bearing end surfaces one 7b of the pair of flange bearings 7 are respectively in matched contact with the side plate inner side surfaces two 5b of the pair of side plates 5. Both ends of the cam fulcrum shaft 61 of the cam shaft 6 are respectively in rotational contact with the flange bearing inner hole surfaces 7d of the pair of flange bearings 7, both ends of the cam shaft end surface 61a of the cam shaft 6 are respectively in matching contact with the flange bearing end surfaces 7c of the pair of flange bearings 7, and the cam shaft 6 is axially limited by the flange bearings 7.
The flange bearing 7 is a ball bearing or a needle bearing.
Example two:
in this embodiment, the utility model discloses a circuit breaker operating device camshaft bearing structure is the spacing mounting structure of curb plate shaping, include: a pair of side plates 8, a camshaft 6 and a bearing 9 provided between the pair of side plates 8.
The operation mechanism of the present invention is shown in fig. 5, 6 and 7. The pair of side plates 8 are symmetrically and fixedly connected by a plurality of fixed shafts. The camshaft 6 is composed of a cam fulcrum shaft 61 and a cam piece 62. The second bearing outer circular surfaces 9a of the pair of bearings 9 are respectively in fit contact with the side plate inner hole surfaces 8a of the pair of side plates 8, and the second bearing end surfaces 9b of the pair of bearings 9 are respectively in fit contact with the side plate end surfaces 8b of the pair of side plates 8. Two ends of the cam fulcrum shaft 61 of the cam shaft 6 are respectively in rotating contact with the second bearing inner hole surfaces 9d of the pair of bearings 9, two ends of the cam shaft end surface 61a of the cam shaft 6 are respectively in matching contact with the third bearing end surfaces 9c of the pair of bearings 9, and the cam shaft 6 is axially limited by the bearings 9. The cam fulcrum shaft 61 of the cam shaft 6 passes through the side plate hole inner walls three 8c of the pair of side plates 8 without contacting therewith.
The bearing 9 is a ball bearing or a needle bearing.
Example three:
in this embodiment, the utility model discloses a circuit breaker operating device camshaft bearing structure is the spacing mounting structure of bearing frame, including a pair of curb plate 10, camshaft 6, bearing 9 and bearing frame 11 of setting between a pair of curb plate 10.
The operation mechanism of the present invention is shown in fig. 8 and 9. The pair of side plates 10 are symmetrically and fixedly connected by a plurality of fixed shafts. The camshaft 6 is composed of a cam fulcrum shaft 61 and a cam piece 62. The second bearing seat outer circular surfaces 11d of the pair of bearing seats 11 are respectively in matched contact with the fourth side plate hole inner walls 10a of the pair of side plates 10, and the sixth bearing seat end surfaces 11e of the pair of bearing seats 11 are respectively in matched contact with the third side plate inner side surfaces 10b of the pair of side plates 10. The second bearing outer circular surfaces 9a of the pair of bearings 9 are respectively in matched contact with the second bearing seat inner hole surfaces 11a of the pair of bearing seats 11, and the second bearing end surfaces 9b of the pair of bearings 9 are respectively in matched contact with the fourth bearing seat end surfaces 11b of the pair of bearing seats 11. Two ends of the cam fulcrum shaft 61 of the cam shaft 6 are respectively in rotating contact with the second bearing inner hole surfaces 9d of the pair of bearings 9, two ends of the cam shaft end surface 61a of the cam shaft 6 are respectively in matching contact with the fifth bearing seat end surfaces 11c of the pair of bearing seats 11, and the cam shaft 6 is axially limited by the bearing seats 11. The fulcrum shaft 61 of the cam shaft 6 passes through but does not contact the bearing seat hole inner walls 11f of the pair of bearing seats 11.
The bearing 9 is a ball bearing or a needle bearing.
In the above embodiments, the flange bearing limiting and mounting structure is either a side plate forming limiting and mounting structure or a bearing seat limiting and mounting structure.
Through the description of the above embodiment, it can be seen by those skilled in the art that the utility model discloses a breaker operating device camshaft support structure is through changing the fragile bearing 3 after tired among the prior art into ball bearing or be needle bearing to three kinds of mounting structures are provided: the device comprises a flange bearing limiting installation structure, a side plate forming limiting installation structure and a bearing seat limiting installation structure. Because the bearing strength of the ball bearing or the needle bearing is very high, the service life of the bearing can be greatly prolonged, and the reliability of the whole operating mechanism is enhanced.
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 (8)
1. The utility model provides a circuit breaker operating device camshaft bearing structure, includes a pair of curb plate (5), sets up camshaft (6) between a pair of curb plate (5), its characterized in that still contains a pair of bearing, a pair of bearing is installed respectively on a pair of curb plate, the both ends of camshaft (6) are in a pair of bearing internal rotation, the terminal surface of bearing with camshaft terminal surface (61 a) contact of camshaft (6), the interior bore face of bearing with cam fulcrum axle (61) of camshaft (6) rotate the contact.
2. A circuit breaker operating mechanism camshaft support structure according to claim 1, wherein the bearing is a flanged bearing (7), and the flanged bearing (7) includes a flanged bearing outer circumferential surface (7 a), a flanged bearing end surface one (7 b), a flanged bearing end surface two (7 c), and a flanged bearing inner bore surface (7 d), wherein the flanged bearing outer circumferential surface (7 a) is in contact with a side plate bore inner wall two (5 a) of the side plate (5), the flanged bearing end surface one (7 b) is in contact with a side plate inner side surface two (5 b) of the side plate (5), the flanged bearing end surface two (7 c) is in contact with a camshaft end surface (61 a) of the camshaft (6), and the flanged bearing inner bore surface (7 d) is in rotational contact with a cam fulcrum shaft (61) of the camshaft (6).
3. The camshaft support structure of a circuit breaker operating mechanism according to claim 1, wherein the bearing comprises a second bearing outer circular surface (9 a), a second bearing end surface (9 b), a third bearing end surface (9 c) and a second bearing inner hole surface (9 d), the side plate (5) is provided with a second side plate inner hole surface (8 a), a second side plate end surface (8 b) and a third side plate inner hole wall (8 c), wherein the second bearing outer circular surface (9 a) is in contact with the second side plate inner hole surface (8 a), the second bearing end surface (9 b) is in contact with the second side plate end surface (8 b), the third bearing end surface (9 c) is in contact with the camshaft end surface (61 a) of the camshaft (6), and the second bearing inner hole surface (9 d) is in rotational contact with a fulcrum shaft (61) of the camshaft (6).
4. A camshaft support structure of a circuit breaker operating mechanism according to claim 2, characterized in that the flange bearing (7) is a ball bearing.
5. A camshaft support structure of a circuit breaker operating mechanism as claimed in claim 2, characterized in that the flange bearing (7) is a needle bearing.
6. A camshaft support structure of a circuit breaker operating mechanism as claimed in claim 3, characterized in that the bearings (9) are ball bearings.
7. A camshaft support structure of a circuit breaker operating mechanism as claimed in claim 3, characterized in that the bearing (9) is a needle bearing.
8. A camshaft support structure of an operating mechanism of a circuit breaker according to claim 1, characterized in that the pair of side plates (5) are fixedly connected by a plurality of fixed shafts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921704113.4U CN211376561U (en) | 2019-09-30 | 2019-09-30 | Camshaft supporting structure of circuit breaker operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921704113.4U CN211376561U (en) | 2019-09-30 | 2019-09-30 | Camshaft supporting structure of circuit breaker operating mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN211376561U true CN211376561U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921704113.4U Active CN211376561U (en) | 2019-09-30 | 2019-09-30 | Camshaft supporting structure of circuit breaker operating mechanism |
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| CN (1) | CN211376561U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2021186553A1 (en) * | 2020-03-17 | 2021-09-23 |
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2019
- 2019-09-30 CN CN201921704113.4U patent/CN211376561U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2021186553A1 (en) * | 2020-03-17 | 2021-09-23 | ||
| JP7239058B2 (en) | 2020-03-17 | 2023-03-14 | 三菱電機株式会社 | Bearing retainer and air circuit breaker with this bearing retainer |
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