Operating mechanism for universal circuit breaker

Abstract

The utility model discloses an operating mechanism for a universal circuit breaker, which belongs to the technical field of circuit breaker energy storage and comprises a first mounting frame, a motor and a rotating shaft, a speed change assembly is arranged on the inner side of the first mounting frame, a manual assembly is arranged at the outer end of the speed change assembly, a second mounting frame is arranged at the outer end of the rotating shaft, and a limiting assembly is arranged on the inner side of the second mounting frame. The motor drives the transmission gear to rotate through the driving gear at the output end, the transmission gear is connected with the sun gear, the motor can drive the rotating shaft to rotate through multi-stage speed reduction of the speed change assembly, and the rotating shaft is connected with the spring energy storage mechanism. Energy storage of the spring energy storage mechanism can be easily completed through torque amplification of the speed change assembly, meanwhile, the manual gear is meshed with the transmission gear, the transmission gear can be driven by rotating the pull rod, and therefore the manual assembly and the motor can jointly use the speed change assembly to store energy of the spring energy storage mechanism, and the energy storage efficiency is improved. The structure compactness can be improved, and the size is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker energy storage technical field more specifically, relate to a kind of operating mechanism for universal circuit breaker. BACKGROUND

[0002] Universal circuit breaker is also called frame circuit breaker, and the frame circuit breaker is an important device for protecting electrical systems from overload and short circuit failures, usually designed for larger capacity electrical systems, with high rated current and rated voltage, which can effectively protect the circuit from failure, can quickly respond to abnormal conditions in the circuit, quickly cut off the current, to ensure the safety of electrical systems, with high reliability and stability, can effectively operate under various environmental conditions, and continuously protect electrical systems.

[0003] In large circuit breaker, both opening and closing need to quickly cut off the current, which can reduce the arc generated by the power contact when not connected, to ensure the safety of equipment and personnel, and the spring energy storage mechanism can quickly respond within milliseconds, opening and closing, so it will be widely used in large circuit breaker.

[0004] The current spring energy storage mechanism on circuit breaker, the energy storage structure adopts electric or manual, but all adopts single-stage pinion to drive large gear, so that the torque amplification is small, for the spring with larger tension, the process of energy storage and stretching spring is more difficult, and manual and electric adopt two sets of speed change mechanism, resulting in larger size, structure is not compact enough.

[0005] Therefore, it is necessary to provide an operating mechanism for universal circuit breaker to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model provides an operating mechanism for universal circuit breaker, which can improve the single-stage pinion driving large gear in related technology, which can amplify the torque, making it difficult to stretch the spring with larger tension, and the manual and electric adopt two sets of speed change mechanism, resulting in larger size, structure is not compact enough.

[0007] The embodiment of the application provides an operating mechanism for a universal circuit breaker, which comprises a mounting frame one, a motor and a rotating shaft, a speed changing assembly is arranged on the inner side of the mounting frame one, a manual assembly is arranged on the outer end of the speed changing assembly, a mounting frame two is arranged on the outer end of the rotating shaft, a limiting assembly is arranged on the inner side of the mounting frame two, a driving gear is connected to the output end of the motor, a transmission gear is arranged on the outer end of the speed changing assembly, the transmission gear is in meshing connection with the driving gear, the manual assembly comprises a manual gear, the manual gear is in meshing connection with the transmission gear, the speed changing assembly comprises a sun gear, the sun gear is fixedly connected with the transmission gear, and a plurality of planetary gears one are in meshing connection with the outer end of the sun gear.

[0008] The technical scheme described above in the embodiment of the application has at least the following technical effects:

[0009] (1) The motor drives the transmission gear to rotate through the driving gear on the output end, the transmission gear is connected with the sun gear, so that the motor can drive the rotating shaft to rotate through the multi-stage speed reduction of the speed changing assembly, the rotating shaft is connected with the spring energy storage mechanism, and energy storage of the spring energy storage mechanism can be easily completed through torque amplification of the speed changing assembly.

[0010] (2) Meanwhile, the manual gear is also in meshing connection with the transmission gear, the transmission gear can be driven by rotating the pull rod, so that the manual assembly and the motor can jointly use the speed changing assembly to store energy for the spring energy storage mechanism, and the compactness of the structure can be improved and the size can be reduced.

[0011] In some embodiments, the speed changing assembly further comprises an inner gear ring one and an inner gear ring two, the inner gear ring one is fixedly connected with a connecting frame outside, the inner gear ring two is in rotating connection with the inner side of the inner gear ring one on the outer end, and the plurality of planetary gears one are in meshing connection with the inner side of the inner gear ring one.

[0012] In some embodiments, the speed changing assembly further comprises a partition plate, a plurality of connecting shafts are fixedly connected with the partition plate on the outer end, one end of the plurality of connecting shafts is fixedly connected with the plurality of planetary gears one respectively, the other end of the connecting shafts is fixedly connected with planetary gears two, the plurality of planetary gears one and the plurality of planetary gears two correspond to each other, the plurality of planetary gears two are in meshing connection with the inner side of the inner gear ring two, the outer end of the inner gear ring two is in key connection with one end of the rotating shaft, and one end of the connecting shafts is fixedly connected with the inner side of the inner gear ring one.

[0013] In some embodiments, the limiting assembly comprises a ratchet wheel, the ratchet wheel is fixedly installed on the outer end of the rotating shaft, a pawl is in rotating connection with the inner side of the mounting frame two, and the pawl is matched with the ratchet wheel.

[0014] In some embodiments, the limiting assembly further comprises a top rod, the installation block is fixedly connected to the inner side of the installation frame two, the top rod is in sliding connection with the installation block, a telescopic spring is sleeved on the outer end of the top rod, and the top rod is moved upward by the action force of the telescopic spring and abuts against the pawl.

[0015] In some embodiments, the manual assembly further comprises an installation shaft, the manual gear is rotatably installed at the outer end of the installation shaft, the outer end of the installation shaft is rotatably connected with a pull rod and a connecting block respectively, and the pull rod and the connecting block are fixedly connected at the outer end.

[0016] In some embodiments, a plurality of abutting claws are fixedly connected to the outer end of the connecting block, the manual gear is provided with a ratchet groove on the side close to the abutting claw, and the ratchet groove is matched with the abutting claw. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the local explosion structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the energy storage assembly explosion structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the limiting assembly structure of the utility model;

[0022] Figure 5 It is a schematic diagram of the manual assembly structure of the utility model.

[0023] Explanation of reference numerals in the drawings:

[0024] 1, installation frame one;

[0025] 2, motor;

[0026] 3, manual assembly; 31, pull rod; 32, manual gear; 33, ratchet groove; 34, connecting block; 35, abutting claw; 36, installation shaft;

[0027] 4, rotating shaft;

[0028] 5, installation frame two;

[0029] 6, limiting assembly; 61, ratchet wheel; 62, pawl; 63, ejector rod; 64, extension spring; 65, mounting block;

[0030] 7, speed change assembly; 71, sun gear; 72, inner ring one; 73, inner ring two; 74, planetary gear one; 75, connecting shaft; 76, planetary gear two; 77, partition plate;

[0031] 8, transmission gear;

[0032] 9, drive gear;

[0033] 10, connecting frame. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved in the present application more clear and obvious, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0035] Based on this, the single-stage pinion driving the large gear in the related art can be improved, so that the torque amplification is smaller, and the process of energy storage stretching spring is more difficult for the spring with larger tension. At the same time, two sets of speed change mechanisms are used for manual and electric driving, resulting in larger volume and less compact structure.

[0036] Please refer to Figures 1-5 An operating mechanism for a universal circuit breaker, comprising a mounting frame one 1, a motor 2 and a rotating shaft 4, the inner side of the mounting frame one 1 is provided with a speed change assembly 7, the outer end of the speed change assembly 7 is provided with a manual assembly 3, the outer end of the rotating shaft 4 is provided with a mounting frame two 5, the inner side of the mounting frame two 5 is provided with a limiting assembly 6, the output end of the motor 2 is keyed connected with a drive gear 9, the outer end of the speed change assembly 7 is provided with a transmission gear 8, the transmission gear 8 is meshed and connected with the drive gear 9, the manual assembly 3 comprises a manual gear 32, the manual gear 32 is meshed and connected with the transmission gear 8, the speed change assembly 7 comprises a sun gear 71, the sun gear 71 is fixedly connected with the transmission gear 8, the outer end of the sun gear 71 is meshed and connected with a plurality of planetary gears one 74.

[0037] The spring energy storage mechanism is used for opening and closing of the circuit breaker. The main function of the spring energy storage mechanism is to release a force instantaneously to make the circuit breaker open rapidly. When the circuit breaker opens, the moving and static contacts will generate an arc. The longer the arc exists, the greater the damage to the contacts. Therefore, the circuit breaker must have a high speed to cut off the current. The spring energy storage mechanism can avoid slow opening and closing of the circuit breaker, can respond rapidly within milliseconds, and can reduce the damage of the arc to the contacts. The device in the scheme is mainly used for charging the spring energy storage mechanism in the circuit breaker.

[0038] The rotating shaft 4 is connected with the spring energy storage mechanism. The rotating shaft 4 is charged by rotating. The variable speed assembly 7 is arranged on the inner side of the mounting frame 1. The variable speed assembly 7 is directly connected with the rotating shaft 4 and drives the rotating shaft 4. The outer end of the variable speed assembly 7 is provided with the motor 2 and the manual assembly 3. The motor 2 and the manual assembly 3 can be driven by electricity or manually. The motor 2 drives the transmission gear 8 to rotate through the driving gear 9 at the output end. The transmission gear 8 is connected with the sun gear 71. The motor 2 can drive the rotating shaft 4 to rotate through the multi-stage reduction of the variable speed assembly 7. The rotating shaft 4 is connected with the spring energy storage mechanism. The spring energy storage mechanism can be easily charged by torque amplification of the variable speed assembly 7. The manual gear 32 is also engaged with the transmission gear 8. The transmission gear 8 can be driven by rotating the pull rod 31. Therefore, the motor 2 and the manual assembly 3 can use the variable speed assembly 7 to charge the spring energy storage mechanism. The compactness of the structure can be improved and the size can be reduced.

[0039] Optionally, in some embodiments, referring to Figure 2 and Figure 3 , the variable speed assembly 7 further comprises an inner ring one 72 and an inner ring two 73. The inner ring one 72 is fixedly connected with the connecting frame 10. The outer end of the inner ring two 73 is rotatably connected with the inner side of the inner ring one 72. A plurality of planetary gears one 74 are engaged with the inner side of the inner ring one 72.

[0040] The variable speed assembly 7 further comprises a partition plate 77. The outer end of the partition plate 77 is fixedly connected with a plurality of connecting shafts 75. One end of each of the connecting shafts 75 is fixedly connected with one of the plurality of planetary gears one 74. The other end of each of the connecting shafts 75 is fixedly connected with a planetary gear two 76. One of the plurality of planetary gears one 74 corresponds to one of the plurality of planetary gears two 76. The plurality of planetary gears two 76 are engaged with the inner side of the inner ring two 73. The outer end of the inner ring two 73 is keyed with one end of the rotating shaft 4. One end of each of the connecting shafts 75 is fixedly connected with the inner side of the inner ring one 72.

[0041] The inner gear ring one 72 in the scheme is fixed with the connecting frame 10 at the outer end, the connecting frame 10 is fixed in the circuit breaker through bolts, so that the inner gear ring one 72 is fixed and cannot rotate, the inner gear ring two 73 is rotatably connected at the outer end of the inner gear ring one 72, the sun gear 71 is located in the inner gear ring one 72, and the transmission gear 8 is connected through the inner gear ring one 72, three planetary gears one 74 are connected around the sun gear 71, and the three planetary gears one 74 are connected with the inner side of the inner gear ring one 72 at the same time, the partition plate 77 is arranged between the inner gear ring one 72 and the inner gear ring two 73, the outer end of the partition plate 77 is fixed with three connecting shafts 75, and the two ends of the connecting shaft 75 are connected with the planetary gear one 74 and the planetary gear two 76 respectively, and the connecting shaft 75 is fixed with the planetary gear one 74 and the inner side of the inner gear ring one 72 at the same end, so that the planetary gear one 74 and the planetary gear two 76 are fixed and can only rotate, but cannot revolve around the sun gear 71, and the outer end of the inner gear ring two 73 is fixedly connected with the rotating shaft 4, so that when the transmission gear 8 rotates, the transmission gear 8 drives the sun gear 71 to rotate, the sun gear 71 drives the planetary gear one 74 to rotate, the planetary gear one 74 drives the planetary gear two 76 to rotate through the connection of the connecting shaft 75, and the planetary gear two 76 drives the inner gear ring two 73 to rotate, and the inner gear ring two 73 drives the rotating shaft 4 to rotate, through the multi-stage reduction inside the speed change assembly 7, the torque can be amplified, so that it can be stretched more easily when dealing with the energy storage spring with large pulling force.

[0042] Optionally, in some embodiments, please refer to Figure 1 and Figure 4 The limiting assembly 6 comprises a ratchet wheel 61 fixedly installed at the outer end of the rotating shaft 4, and a pawl 62 rotatably connected to the inner side of the mounting frame two 5, and the pawl 62 is matched with the ratchet wheel 61.

[0043] The limiting assembly 6 further comprises a top rod 63, an installation block 65 fixedly connected to the inner side of the mounting frame two 5, and the top rod 63 is slidably connected with the installation block 65, the outer end of the top rod 63 is sleeved with a telescopic spring 64, and the top rod 63 moves upward and abuts against the pawl 62 through the action force of the telescopic spring 64.

[0044] The limiting assembly 6 in the scheme is mainly used for limiting the rotating shaft 4, so that it cannot rotate reversely, and it will not reverse when driving the spring energy storage mechanism. The mounting frame two 5 is fixed in the internal of the circuit breaker, the rotating shaft 4 only passes through but is not connected, and the ratchet wheel 61 is fixed on the rotating shaft 4. The pawl 62 is rotatably connected on the inner side of the mounting frame two 5. The mounting block 65 is also fixed on the inner side of the mounting frame two 5. The top rod 63 is slidably connected on the mounting block 65, so that the top rod 63 can slide. The telescopic spring 64 is sleeved on the top rod 63. The telescopic spring 64 is mainly used for pushing the pawl 62 to the direction of the ratchet wheel 61, so that the pawl 62 can clamp the ratchet wheel 61, so that the ratchet wheel 61 can only move in one direction, thereby achieving the limiting effect of the rotating shaft 4.

[0045] Optionally, in some embodiments, referring to Figure 1 and Figure 5 , the manual assembly 3 further comprises a mounting shaft 36, and the manual gear 32 is rotatably mounted at the outer end of the mounting shaft 36. The outer end of the mounting shaft 36 is rotatably connected with a pull rod 31 and a connecting block 34 respectively, and the outer end of the pull rod 31 and the connecting block 34 is fixedly connected.

[0046] The outer end of the connecting block 34 is fixedly connected with a plurality of abutting claws 35. The manual gear 32 is provided with a ratchet groove 33 on the side close to the abutting claw 35. The ratchet groove 33 is matched with the abutting claw 35.

[0047] The manual assembly 3 in the scheme is mainly used for manually driving the transmission gear 8. The motor 2 drives through the driving gear 9 fixed on the output end and the meshing connection with the transmission gear 8. The manual assembly 3 drives through the meshing connection between the manual gear 32 and the transmission gear 8. The manual gear 32, the manual gear 32, the connecting block 34 and the abutting claw 35 are all penetrated by the mounting shaft 36 which is mounted in the circuit breaker. The handle end of the pull rod 31 is outside the circuit breaker. The manual gear 32, the manual gear 32, the connecting block 34 and the abutting claw 35 can all rotate around the mounting shaft 36. The ratchet groove 33 is formed in the inner side of the manual gear 32. The outer end of the connecting block 34 is fixed with a plurality of annularly distributed abutting claws 35. The abutting claw 35 matches the notch in the ratchet groove 33. When the pull rod 31 is pulled downward, the abutting claw 35 is clamped in the ratchet groove 33, so as to drive the manual gear 32 to rotate. The manual gear 32 drives the transmission gear 8 to rotate. After the pull rod 31 is rotated downward by a certain angle, the pull rod 31 can be rotated upward to reset. At this time, the abutting claw 35 cannot be clamped by the ratchet groove 33, so as to make the manual gear 32 not rotate with the motor. The manual gear 32 also only rotates in one direction. It is worth mentioning that the manual assembly 3 can move outward or to both sides through the movable mechanism when the motor 2 drives the transmission gear 8. When the manual assembly 3 is needed, the manual assembly 3 is moved to reset. The manual assembly 3 and the motor 2 share one speed change assembly 7 to drive the rotating shaft 4. Two sets of speed reduction mechanisms are not needed, the compactness of the internal structure of the circuit breaker is improved, and the occupied space is reduced.

[0048] Working principle: when the rotating shaft 4 needs to drive the spring energy storage mechanism, it can be driven by electricity or manually. The motor 2 drives through the driving gear 9 fixed on the output end and the meshing connection with the transmission gear 8. At this time, the transmission gear 8 drives the sun gear 71 to rotate, the sun gear 71 drives the planetary gear one 74 to rotate, the planetary gear one 74 drives the planetary gear two 76 to rotate through the connection of the connecting shaft 75, the inner tooth ring one 72, the planetary gear one 74 and the planetary gear two 76 are fixed, at this time, the planetary gear two 76 drives the inner tooth ring two 73 to rotate, then the inner tooth ring two 73 drives the rotating shaft 4 to rotate. When manual operation is needed, the abutting claw 35 is clamped in the ratchet groove 33 by pulling the pull rod 31 downward, so as to drive the manual gear 32 to rotate. The manual gear 32 drives the transmission gear 8 to rotate. The transmission gear 8 can be driven manually by repeatedly pulling the pull rod 31.

Claims

1. An operating mechanism for a molded case circuit breaker, comprising a mounting frame (1), a motor (2) and a rotating shaft (4), characterized in that: The inside of the mounting frame one (1) is provided with a variable speed assembly (7), the outer end of the variable speed assembly (7) is provided with a manual assembly (3), the outer end of the rotating shaft (4) is provided with a mounting frame two (5), the inside of the mounting frame two (5) is provided with a limiting assembly (6); The output end of the motor (2) is key connected with a drive gear (9), the outer end of the variable speed assembly (7) is provided with a transmission gear (8), and the transmission gear (8) is meshed and connected with the drive gear (9); The manual assembly (3) comprises a manual gear (32), and the manual gear (32) is meshed and connected with the transmission gear (8). The variable speed assembly (7) comprises a sun gear (71), the sun gear (71) is fixedly connected with the transmission gear (8), and the outer end of the sun gear (71) is meshed and connected with a plurality of planetary gears one (74).

2. An operating mechanism for a universal circuit breaker according to claim 1, characterized in that: The variable speed assembly (7) further comprises an inner gear ring one (72) and an inner gear ring two (73), the outer end of the inner gear ring one (72) is fixedly connected with a connecting frame (10), the outer end of the inner gear ring two (73) is rotatably connected with the inside of the inner gear ring one (72), and the plurality of planetary gears one (74) are all meshed and connected with the inside of the inner gear ring one (72).

3. An operating mechanism for a universal circuit breaker according to claim 1, characterized in that: The variable speed assembly (7) further comprises a partition plate (77), the outer end of the partition plate (77) is fixedly connected with a plurality of connecting shafts (75), one end of each of the plurality of connecting shafts (75) is fixedly connected with a plurality of planetary gears one (74), the other end of the connecting shaft (75) is fixedly connected with a planetary gear two (76), the plurality of planetary gears one (74) and the plurality of planetary gears two (76) are one-to-one corresponding, the plurality of planetary gears two (76) are meshed and connected with the inside of the inner gear ring two (73), the outer end of the inner gear ring two (73) is key connected with one end of the rotating shaft (4), and the one end of the connecting shaft (75) is fixedly connected with the inside of the inner gear ring one (72).

4. An operating mechanism for a universal circuit breaker according to claim 1, characterized in that: The limiting assembly (6) comprises a ratchet wheel (61), the ratchet wheel (61) is fixedly installed at the outer end of the rotating shaft (4), the inside of the mounting frame two (5) is rotatably connected with a pawl (62), and the pawl (62) is matched with the ratchet wheel (61).

5. An operating mechanism for a universal circuit breaker according to claim 1, characterized in that: The limiting assembly (6) further comprises a jacking rod (63), the inside of the mounting frame two (5) is fixedly connected with a mounting block (65), the jacking rod (63) is slidably connected with the mounting block (65), the outer end of the jacking rod (63) is sleeved with a telescopic spring (64), and the jacking rod (63) moves upward under the action force of the telescopic spring (64) and abuts against the pawl (62).

6. An operating mechanism for a universal circuit breaker according to claim 1, characterized in that: The manual assembly (3) further comprises a mounting shaft (36), the manual gear (32) is rotatably installed at the outer end of the mounting shaft (36), the outer end of the mounting shaft (36) is rotatably connected with a pull rod (31) and a connecting block (34) respectively, and the outer end of the pull rod (31) and the connecting block (34) is fixedly connected.

7. An operating mechanism for a universal circuit breaker according to claim 6 wherein: The outer end of the connecting block (34) is fixedly connected with a plurality of abutting claws (35), the side, close to the abutting claw (35), of the manual gear (32) is provided with a ratchet groove (33), and the ratchet groove (33) is matched with the abutting claw (35).

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