Energy storage device of spring operating mechanism for high-voltage circuit breaker

Abstract

The utility model relates to an energy storage device of a spring operating mechanism for a high-voltage circuit breaker. The energy storage device comprises an aluminum support, an energy storage spline shaft coupled on the aluminum support and a driving mechanism for driving a missing gear to rotate, the two ends of the energy storage spline shaft are fixedly connected with a missing gear and a closing cam used for closing respectively, the aluminum support is provided with a guide long groove, a closing spring pressing shaft connected with a closing spring assembly is arranged in the guide long groove in a sliding mode, and the closing spring pressing shaft is connected with a pulling plate connecting shaft through a closing spring pulling plate. By means of the optimized design of the overall structure, the energy storage device is small in size and can be better suitable for the working conditions of small space and large operation work, a novel three-level straight gear transmission and tooth missing disengaging structure is adopted for energy storage, the overrun clutch is arranged on the two-level gear shaft, and compared with a traditional spring mechanism, the energy storage device has the advantages that the energy storage effect is good, and the energy storage effect is good. The design margin of the clutch is greatly improved, and the reliability of energy storage is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an energy storage device of a spring operating mechanism for a high-voltage circuit breaker. Background Art

[0002] With the development of high voltage transmission technology, it is of great significance to realize long-distance and large-capacity transmission, optimize resource allocation and reduce environmental impact. Spring operating mechanism is widely used in high voltage circuit breakers due to its simple structure, small size, long life, no pollution to the environment, good resistance to weather conditions and high reliability.

[0003] The spring operating mechanisms currently used in large quantities in the market are mainly ratchet and pawl energy storage or helical and spur gear multi-stage transmission energy storage structures, which have the following main shortcomings: the aluminum support structure is complex, large in size, difficult to manufacture, high in cost, and requires a large operating and maintenance space; the key parts of the energy storage module (such as the clutch) have insufficient design margins, high processing accuracy requirements (such as ratchet and pawl), and are difficult to manufacture; the multi-stage gear transmission layout is unreasonable, affecting the gear strength and miniaturization design. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides an energy storage device of a spring operating mechanism for a high-voltage circuit breaker.

[0005] The utility model is realized through the following technical scheme, which provides an energy storage device of a spring operating mechanism for a high-voltage circuit breaker, including an aluminum support, an energy storage spline shaft connected to the aluminum support, and a driving mechanism for driving the missing gear to rotate; the two ends of the energy storage spline shaft are respectively fixed with a missing gear and a closing cam for closing the switch, the aluminum support is provided with a guide long groove, a closing spring pressure shaft connected to a closing spring assembly slides in the guide long groove, the closing spring pressure shaft is connected to a pull plate connecting shaft through a closing spring pull plate, and the pull plate connecting shaft is eccentrically fixed to the energy storage spline shaft. In this scheme, the closing spring pressure shaft slides in the guide long groove, is eccentrically fixed to the energy storage spline shaft through the closing spring pull plate, and cooperates with the closing spring assembly and the opening spring assembly to realize the closing and opening operations, which has a compact structure and can be better applied to working conditions with small space and large operating power.

[0006] As an optimization, the driving mechanism includes a motor and a primary reduction gear shaft and a secondary reduction clutch shaft both of which are connected to an aluminum support. The motor assembly drives the primary reduction gear shaft to rotate through a first reduction gear set, the primary reduction gear shaft drives the secondary reduction clutch shaft to rotate through a second reduction gear set, and the secondary reduction clutch shaft drives the missing gear to rotate through a driving gear. The rotation of the missing gear is achieved through three-stage reduction of the first reduction gear set, the second reduction gear set and the driving gear.

[0007] As an optimization, a first overrunning clutch is installed between the passive gear in the second reduction gear set and the secondary reduction clutch shaft. The first overrunning clutch is arranged in this scheme, so that the passive gear in the second reduction gear set can drive the secondary reduction clutch shaft to rotate counterclockwise, and the counterclockwise rotation of the secondary reduction clutch shaft when closing the switch will not drive the passive gear in the second reduction gear set to rotate, thereby ensuring the torque maintenance during the energy storage process and disengaging the driving mechanism when closing the switch.

[0008] As an optimization, a second overrunning clutch is arranged between the secondary reduction clutch shaft and the aluminum support. The second overrunning clutch arranged in this solution prevents the secondary reduction clutch shaft from reversing.

[0009] As an optimization, the outer ring of the missing gear is provided with a notch. In this solution, the missing tooth structure of the missing gear disengages the driving mechanism.

[0010] As an optimization, the energy storage spline shaft, the primary reduction gear shaft and the secondary reduction clutch shaft are coplanar and parallel to the length direction of the guide slot. In this solution, the length direction of the guide slot is parallel to the arrangement direction of the multiple shafts, making the entire spring operating mechanism compact.

[0011] As an optimization, two closing spring pull plates are provided and are respectively hinged at the two ends of the closing spring pressure shaft, and the two closing spring pull plates are respectively hinged to the two pull plate connecting shafts, and the two pull plate connecting shafts are respectively fixed to the missing gear and the closing cam. In this solution, two closing spring pull plates are provided, so that the two ends of the closing spring pressure shaft are symmetrically stressed, which solves the friction problem between the closing spring assembly of the traditional spring operating mechanism and the guide cylinder when it is compressed.

[0012] As an optimization, a travel switch for detecting that the closing spring pull plate reaches the energy storage position is installed on the aluminum support. The travel switch in this solution is used to cut off the power supply of the motor when the closing spring pull plate reaches the energy storage position.

[0013] The beneficial effects of the utility model are as follows: the energy storage device of the spring operating mechanism for a high-voltage circuit breaker of the utility model has a small size through the optimized design of the overall structure, and can be better adapted to working conditions of small space and large operating work. A new three-stage spur gear transmission and a tooth-missing disengagement structure are used for energy storage, and the overrunning clutch is arranged on the secondary gear shaft. Compared with the traditional spring mechanism, the design margin of the clutch is greatly improved, and the reliability of energy storage is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of the utility model;

[0015] Figure 2 It is a cross-sectional view of the horizontal plane where the energy storage spline shaft of the present invention is located;

[0016] Figure 3It is a cross-sectional view of the energy storage spline shaft and the closing spring compression shaft of the present invention;

[0017] As shown in the figure:

[0018] 1. Aluminum support, 2. Motor, 3. Primary reduction gear shaft, 4. Secondary reduction clutch shaft, 4-1. First overrunning clutch, 4-2. Second overrunning clutch, 4-3. First driving gear, 4-4. First passive gear, 4-5. Second driving gear, 4-6. Second passive gear, 4-7. Driving gear, 5. Energy storage spline shaft, 5-1. Missing gear, 6-1. Closing spring pull plate, 6-2. Closing spring pressure shaft, 6-3. Travel switch, 6-4. Pull plate connecting shaft, 7. Closing spring assembly, 8. Closing cam. DETAILED DESCRIPTION

[0019] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0020] like Figures 1 to 3 As shown, the energy storage device of the spring operating mechanism for a high-voltage circuit breaker of the utility model comprises an aluminum support 1, an energy storage spline shaft 5 connected to the aluminum support 1, and a driving mechanism for driving the missing gear 5-1 to rotate; the missing gear 5-1 and a closing cam 8 for closing the switch are respectively fixedly connected at both ends of the energy storage spline shaft 5. The closing cam 8 contacts the roller of the intermediate conversion crank arm after collision, thereby driving the intermediate conversion crank arm to swing, and also driving the output spline shaft to rotate to realize the closing operation.

[0021] The driving mechanism includes a motor 2 and a primary reduction gear shaft 3 and a secondary reduction clutch shaft 4 which are both axially connected to an aluminum support 1. The energy storage spline shaft 5, the primary reduction gear shaft 3 and the secondary reduction clutch shaft 4 are coplanar.

[0022] The motor 2 drives the primary reduction gear shaft 3 to rotate through the first reduction gear set. Figure 2 As shown, the first reduction gear set includes a first driving gear 4-3 fixedly connected to the rotating shaft of the motor 2 and a first passive gear 4-4 fixedly connected to the primary reduction gear shaft 3. The diameter of the first passive gear 4-4 is larger than the diameter of the first driving gear 4-3, which has the effect of reducing speed and increasing torque.

[0023] The primary reduction gear shaft 3 drives the secondary reduction clutch shaft 4 to rotate through the second reduction gear set. The second reduction gear set includes a second driving gear 4-5 fixedly connected to the primary reduction gear shaft 3 and a second passive gear 4-6 installed on the secondary reduction clutch shaft 4. The diameter of the second passive gear 4-6 is greater than that of the second driving gear 4-5.

[0024] The first overrunning clutch 4-1 is installed between the driven gear in the second reduction gear set and the secondary reduction clutch shaft 4. That is, in this embodiment, the first overrunning clutch 4-1 is installed between the second driven gear 4-6 and the secondary reduction clutch shaft 4. Figure 1 As shown, the passive gear in the second reduction gear set can drive the secondary reduction clutch shaft 4 to rotate counterclockwise, while the counterclockwise rotation of the secondary reduction clutch shaft 4 when the secondary reduction clutch shaft 4 is closed will not drive the second passive gear 4-6 to rotate.

[0025] A second overrunning clutch 4-2 is installed between the secondary deceleration clutch shaft 4 and the aluminum support 1 to prevent the secondary deceleration clutch shaft 4 from reversing. In this embodiment, the first overrunning clutch 4-1 and the second overrunning clutch 4-2 are both LH76 / 52B overrunning clutches manufactured by Luoyang Chaoyue Machinery Co., Ltd.

[0026] The secondary reduction clutch shaft 4 drives the missing gear 5-1 to rotate through the driving gear 4-7. The diameter of the driving gear 4-7 is smaller than the diameter of the missing gear 5-1.

[0027] The outer ring of the missing gear 5-1 is provided with a notch. When the notch of the missing gear 5-1 rotates to the position of the driving gear 4-7, energy storage is completed.

[0028] The aluminum support 1 is provided with a long guide groove. The aluminum support 1 in this embodiment is formed by splicing a plurality of plates, so the long guide groove is arranged on the plurality of plates to improve the guiding effect.

[0029] A closing spring pressure shaft 6-2 connected to the closing spring assembly 7 slides in the guide long groove, and the closing spring pressure shaft 6-2 is connected to the telescopic shaft of the closing spring assembly 7. When the energy storage spline shaft 5 rotates to the energy storage position, the closing spring pressure shaft 6-2 is pulled by the closing spring pull plate 6-1 to slide in the guide long groove and compress the closing spring assembly 7, thereby realizing energy storage, and the closing spring assembly 7 drives the closing when it is extended.

[0030] The closing spring pressure shaft 6-2 is connected to the pull plate connecting shaft 6-4 through the closing spring pull plate 6-1, and the pull plate connecting shaft 6-4 is eccentrically fixed to the energy storage spline shaft 5. The closing spring pressure shaft 6-2 passes through the aluminum support 1 and is parallel to the energy storage spline shaft 5. The diameter of the closing spring pressure shaft 6-2 is equal to the width direction of the guide long groove to achieve guidance. The energy storage spline shaft 5, the first-stage reduction gear shaft 3 and the second-stage reduction clutch shaft 4 are coplanar and parallel to the length direction of the guide long groove. In this embodiment, the energy storage spline shaft 5, the first-stage reduction gear shaft 3 and the second-stage reduction clutch shaft 4 are arranged horizontally, so the guide long groove extends horizontally, and the guide long groove is located below the first-stage reduction gear shaft 3.

[0031] The closing spring pull plates 6-1 are provided with two and are respectively hinged at both ends of the closing spring pressure shaft 6-2. The two closing spring pull plates 6-1 are respectively hinged to two pull plate connecting shafts 6-4, and the two pull plate connecting shafts 6-4 are respectively fixed to the missing gear 5-1 and the closing cam 8.

[0032] The aluminum support 1 is provided with a travel switch 6-3 for detecting that the closing spring pull plate 6-1 reaches the energy storage position.

[0033] The use of the utility model:

[0034] When storing energy, the motor 2 rotates, and drives the primary reduction gear shaft 3 to rotate through the first reduction gear set. The primary reduction gear shaft 3 drives the secondary reduction clutch shaft 4 to rotate through the second reduction gear set. The secondary reduction clutch shaft 4 drives the missing gear 5-1 to rotate through the gear, so that the missing gear 5-1 rotates along the Figure 1 Rotate counterclockwise.

[0035] A first overrunning clutch 4-1 is installed between the passive gear in the second reduction gear group and the secondary reduction clutch shaft 4. Therefore, the passive gear in the second reduction gear group can drive the secondary reduction clutch shaft 4 to rotate counterclockwise, and the counterclockwise rotation of the secondary reduction clutch shaft 4 when the switch is closed will not drive the passive gear in the second reduction gear group to rotate, thereby ensuring the torque maintenance during the energy storage process and disengaging the driving mechanism when closing. A second overrunning clutch 4-2 is installed between the secondary reduction clutch shaft 4 and the aluminum support 1 to prevent the secondary reduction clutch shaft 4 from reversing.

[0036] The missing gear 5-1 rotates, driving the symmetrically arranged closing spring pull plate 6-1, and compressing the closing spring assembly 7 through the closing spring pressure shaft 6-2; when the energy storage is completed, the missing tooth structure of the missing gear 5-1 disengages the driving mechanism. At the same time, the closing spring pull plate 6-1 triggers the travel switch 6-3 to cut off the power supply of the motor 2, the energy storage ends, and the energy of the closing spring assembly 7 is maintained.

[0037] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. An energy storage device for a spring operating mechanism for a high voltage circuit breaker, characterized in that: The invention comprises an aluminum support (1), an energy storage spline shaft (5) axially connected to the aluminum support (1), and a driving mechanism for driving a missing gear (5-1) to rotate; the missing gear (5-1) and a closing cam (8) for closing the switch are respectively fixedly connected at both ends of the energy storage spline shaft (5); the aluminum support (1) is provided with a guide long groove, in which a closing spring pressure shaft (6-2) connected to a closing spring assembly (7) slides; the closing spring pressure shaft (6-2) is connected to a pull plate connecting shaft (6-4) via a closing spring pull plate (6-1); and the pull plate connecting shaft (6-4) is eccentrically fixedly connected to the energy storage spline shaft (5).

2. The energy storage device of a spring operating mechanism for a high-voltage circuit breaker according to claim 1, characterized in that: The driving mechanism comprises a motor (2) and a primary reduction gear shaft (3) and a secondary reduction clutch shaft (4) both of which are axially connected to an aluminum support (1); the motor (2) drives the primary reduction gear shaft (3) to rotate via a first reduction gear set; the primary reduction gear shaft (3) drives the secondary reduction clutch shaft (4) to rotate via a second reduction gear set; and the secondary reduction clutch shaft (4) drives the missing gear (5-1) to rotate via a driving gear (4-7).

3. The energy storage device of a spring operating mechanism for a high-voltage circuit breaker according to claim 2, characterized in that: A first overrunning clutch (4-1) is arranged between the driven gear in the second reduction gear set and the secondary reduction clutch shaft (4).

4. The energy storage device of a spring operating mechanism for a high-voltage circuit breaker according to claim 2, characterized in that: A second overrunning clutch (4-2) is installed between the secondary reduction clutch shaft (4) and the aluminum support (1).

5. The energy storage device of a spring operating mechanism for a high-voltage circuit breaker according to claim 2, characterized in that: The outer ring of the missing gear (5-1) is provided with a notch.

6. The energy storage device of a spring operating mechanism for a high-voltage circuit breaker according to claim 2, characterized in that: The energy storage spline shaft (5), the first-stage reduction gear shaft (3) and the second-stage reduction clutch shaft (4) are coplanar and parallel to the length direction of the guide long slot.

7. The energy storage device of a spring operating mechanism for a high voltage circuit breaker according to claim 1, characterized in that: Two closing spring pull plates (6-1) are provided and are respectively hinged at two ends of a closing spring pressure shaft (6-2); the two closing spring pull plates (6-1) are respectively hinged to two pull plate connecting shafts (6-4); and the two pull plate connecting shafts (6-4) are respectively fixedly connected to the missing gear (5-1) and the closing cam (8).

8. The energy storage device of a spring operating mechanism for a high voltage circuit breaker according to claim 1, characterized in that: The aluminum support (1) is provided with a travel switch (6-3) for detecting whether the closing spring pull plate (6-1) reaches the energy storage position.

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