Electric operating mechanism

Abstract

The utility model relates to an electric operating mechanism, which comprises a shell, a driving module and a sliding module, the driving module and the sliding module are arranged in the shell, the driving module and the sliding module are oppositely arranged in parallel, the driving module comprises a motor, a gear set and a transmission disc, the motor transmits kinetic energy to the sliding module through the gear set and the transmission disc in sequence, and the sliding module is connected with the driving module. The gear sets are meshed in the X-axis direction and arranged in a multi-layer increasing stepped mode in the Z-axis direction. The electric operating mechanism is arranged in a stepped manner, so that friction surfaces matched with gears are reduced, the transmission efficiency is improved, and the internal space is effectively utilized to miniaturize the electric operating mechanism. And meanwhile, the clutch structure of the driving disc ensures unidirectional rotation, so that the reliability and the safety of the system are improved, and the service life of the electric operating mechanism is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low voltage electrical apparatus, more particularly to an electric operating mechanism of circuit breaker. BACKGROUND

[0002] As a power distribution electrical apparatus, the circuit breaker can connect, carry and break the main circuit current, and plays an important role in power generation, power transmission, power distribution and power supply. As a special accessory of the circuit breaker, the electric operating mechanism can remotely electrically close, open and reclose the circuit breaker to realize the concentration and automatic control of the power transmission and distribution network, so that the circuit breaker switching is more reliable, labor-saving and safe.

[0003] The existing electric operating mechanism has unreasonable structure design, complex structure, unreliable performance and short service life. The gear set of the electric operating mechanism is directly driven by a high-speed motor, and the gear set structure layout is relatively arbitrary, resulting in nonlinear transmission of the kinetic energy output by the motor, and unstable gap between the gears. Under the repeated impact of the high-speed motor, the gap between the gears will become larger and larger, and the transmission gap between the gears will become larger, which will slow down the operation of the electric operating mechanism, accelerate the wear between the gears, reduce the service life of the overall mechanism, and have serious shortcomings. SUMMARY

[0004] The utility model aims at the shortcomings of the prior art, and provides an electric operating mechanism which is simple in structure, easy to operate, and can effectively solve the problems of unreasonable gear layout and short service life of the electric operating mechanism.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0006] An electric operating mechanism comprises a housing, a driving module arranged in the housing and a sliding module, the driving module and the sliding module are arranged in parallel, the driving module comprises a motor, a gear set and a transmission disc, the motor transmits kinetic energy to the sliding module through the gear set and the transmission disc in sequence, and the gear set is arranged in a stepped arrangement along the X-axis direction and along the Z-axis direction.

[0007] Further, the axis of the motor is arranged in parallel to the Z-axis direction and transmits kinetic energy to the gear set along the X-axis direction.

[0008] Further, at least part of the gears arranged in the same direction along the Z-axis in the gear set are coaxially arranged.

[0009] Further, the gear set comprises a first gear, a second gear and a third gear, the first gear, the second gear and the third gear are meshed with each other, and the centers of the three gears are on the X-axis.

[0010] Further, the gear set comprises a fourth gear coaxially arranged with the second gear.

[0011] Further, the gear set comprises a fifth gear coaxially arranged with the third gear.

[0012] Further, the gears of the gear set are integrated double-layer gears with one large and one small.

[0013] Further, the transmission disc is located in the Y-axis direction of the gear set and is engaged with the gear set.

[0014] Further, the transmission disc is located above the sliding module along the Z-axis direction and is connected with the sliding module.

[0015] Further, the transmission disc is kept rotating in one direction and drives the sliding module to move back and forth along the X-axis direction.

[0016] Further, the sliding module comprises a rotating disc, a first lever, a second lever, a sliding block and a guide rail, the rotating disc is coaxially arranged with the transmission disc and rotates synchronously, the rotating disc drives the sliding block to move back and forth along the X-axis direction on the guide rail through the first lever and the second lever.

[0017] Further, one end of the first lever is rotatably fixed to the rotating disc, and the other end is fixed to the middle part of the second lever; one end of the second lever is rotatably fixed to the housing, and the other end acts on the sliding block.

[0018] Further, the driving module further comprises an operating rod coaxially arranged with the transmission disc and located above the transmission disc along the Z-axis direction.

[0019] The electric operating mechanism is arranged in a stepped arrangement with multiple steps increasing along the X-axis direction through the gear set, which not only reduces the friction surface of the gear cooperation, improves the transmission efficiency, but also effectively utilizes the internal space to miniaturize the electric operating mechanism. Meanwhile, the clutch structure of the transmission disc ensures the one-way rotation, improves the reliability and safety of the system, and effectively improves the service life of the electric operating mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a three-dimensional schematic view of the whole machine outside the electric operating mechanism of the utility model;

[0021] Figure 2 is a plane sectional view of the whole machine of the electric operating mechanism along the XZ plane of the utility model;

[0022] Figure 3 is a three-dimensional sectional view of the whole machine of the electric operating mechanism of the utility model;

[0023] Figure 4 is the plane view along the XZ plane of the internal structure of the electric operating mechanism of the utility model;

[0024] Figure 5 is the three-dimensional view of the internal structure of the electric operating mechanism of the utility model Figure 1 ;

[0025] Figure 6 is the three-dimensional view of the internal structure of the electric operating mechanism of the utility model Figure 2 ;

[0026] Figure 7 is the plane view of the drive module of the electric operating mechanism of the utility model;

[0027] Figure 8 is the plane view along the YZ plane of the internal structure of the electric operating mechanism of the utility model;

[0028] Figure 9 is the plane view along the XZ plane of the sliding module of the electric operating mechanism of the utility model Figure 1 ;

[0029] Figure 10 is the plane view along the XY plane of the sliding module of the electric operating mechanism of the utility model;

[0030] Figure 11 is the plane view along the XZ plane of the sliding module of the electric operating mechanism of the utility model Figure 2 . DETAILED DESCRIPTION

[0031] As shown in Figure 1 , 2 , an electric operating mechanism comprises a mechanism housing 1, a drive module 2, a sliding module 3, a control circuit board 4, a wiring terminal 5, a locking structure 6, and a handle 7.

[0032] The drive module 2, the sliding module 3, and the control circuit board 4 are arranged inside the mechanism housing 1; the locking structure 6 and the handle 7 are respectively inserted into the mechanism housing 1 and can extend to the outside of the mechanism housing 1; and the wiring terminal 5 is arranged on the outside of the mechanism housing 1.

[0033] As shown in Figures 2-4 , the mechanism housing 1 comprises a base 11, a middle cover 12, a support 13, and an upper cover 14. The base 11, the middle cover 12, and the upper cover 14 are made of plastic material and have an insulation and protection effect on the whole machine; and the support 13 is made of metal material and has a supporting and fixing effect on the transmission structure.

[0034] The base 11 is provided with a plurality of mounting hole positions for fixed connection with the circuit breaker, and an operating hole for transmission cooperation with the circuit breaker.

[0035] The middle cover 12 is fixed above the base 11 along the Z-axis direction, and comprises a first chamber 121, a second chamber 122, a third chamber 123 and a fourth chamber 124 arranged on the same side along the Y-axis direction, and the third chamber 123 and the fourth chamber 124 are arranged in front of and behind each other along the X-axis direction.

[0036] The bracket 13 is arranged in the second chamber 122 in an inverted U shape, and the two sides of the bracket 13 are U-shaped arms, and the U-shaped arms are fixed on the base 11, and the cavity wall of the second chamber 122 abuts and wraps the bracket 13, and the second chamber 122 plays an insulating protection role on the bracket 13. The drive module 2 and the sliding module 3 are arranged in the U-shaped inner cavity of the bracket 13, and the bracket 13 and the base 11 play a limiting and fixing role on the drive module 2 and the sliding module 3. Part of the structure of the drive module 2 passes through the bracket 13 and the second chamber 122 to the first chamber 121, reasonably and effectively utilizing the space inside the electric operation mechanism, so that the electric operation mechanism is more miniaturized.

[0037] The upper cover 14 is arranged above the middle cover 12 along the Z-axis direction, and forms a cavity space with the first chamber 121.

[0038] As shown in Figure 2 , 5 , 6, the drive module 2 and the sliding module 3 are arranged in the cavity space formed by the base 11 and the bracket 13, the drive module 2 is located in front of the sliding module 3 along the Y-axis direction, the drive module 2 transmits kinetic energy along the X-axis direction first and then turns to the Y-axis direction, and the sliding module 3 makes reciprocating motion along the X-axis direction after obtaining kinetic energy. The drive module 2 and the sliding module 3 are arranged in parallel along the X-axis, effectively utilizing the internal space of the electric operation, and single-direction kinetic energy transmission can efficiently reduce friction in the cooperation process, effectively improving the service life of the electric operation mechanism.

[0039] The control circuit board 4 is arranged in the cavity space formed by the first chamber 121 and the upper cover 14, and the drive module 2 and the sliding module 3 can trigger the microswitch on the control circuit board 4 during movement, forming a key position signal.

[0040] The wiring terminal 5 is arranged outside the side wall of the first chamber 121, and the wiring terminal 5 is electrically connected with the control circuit board, and can transmit the position signal of the electric operation mechanism to the outside.

[0041] The locking structure 6 is inserted into the third chamber 123 and penetrates into the second chamber 122, for locking the electric operating mechanism in the open position.

[0042] The handle 7 is inserted into the fourth chamber 124, for manually driving the sliding module 3 to move back and forth along the X-axis direction.

[0043] As shown in Figure 3 , 5 8, the driving module 2 includes an electric motor 21, a gear set 22, a transmission disc 23, and an operating rod 24.

[0044] As shown in Figure 3 , 6 7, the electric motor 21 transmits kinetic energy to the sliding module 3 through the gear set 22 and the transmission disc 23 in sequence, and the handle 7 can also directly transmit kinetic energy to the sliding module 3 through the operating rod 24. The electric motor 21 and the gear set 22 both transmit kinetic energy along the X-axis direction, the gear set 22 transmits kinetic energy to the operating rod 24 along the Y-axis direction through the transmission disc 23, and the gear set 22 and the transmission disc 23 not only expand the transmitted kinetic energy, but also realize single-direction kinetic energy transmission, which can efficiently reduce the friction and transmit kinetic energy.

[0045] The electric motor 21 is invertedly arranged on the support 13, and includes a body 211 and an output gear 212. The body 211 and the output gear 212 are arranged parallel to the Z-axis direction, and the output gear 212 is located below the body 211 along the Z-axis direction. The output gear 212 is engaged with the gear set 22, and the body 211 penetrates through the support 13 and the second chamber 122 to the first chamber 121. The top of the body 211 along the Z-axis direction is provided with a power line, which can be conveniently connected with the control circuit board 4, and the control circuit board 4 can control the electric motor 21 to work or not to work. The inverted arrangement of the electric motor 21 not only reasonably and effectively utilizes the space inside the electric operating mechanism, reduces the size of the electric operating mechanism, and makes the electric operating mechanism more miniaturized, but also reduces the wiring distance of the power line inside the electric operating mechanism, reduces the cost of the power line, and facilitates installation.

[0046] As shown in Figures 5-8 , the gear set 22 is provided with a stepped increasing area, and the gear set 22 is arranged in engagement along the X-axis direction and arranged in a stepped arrangement in multiple steps or multiple layers along the Z-axis direction. Regularly arranging the gears can efficiently reduce the friction surface of the gear cooperation, and effectively improve the service life of the electric operating mechanism.

[0047] The gear set 22 comprises a first gear 221, a second gear 222, a third gear 223, a fourth gear 224, a fifth gear 225, a first shaft 226, a second shaft 227, and a third shaft 228. The first gear 221, the second gear 222, the third gear 223, the fourth gear 224, and the fifth gear 225 are coaxially stacked structures of one large and one small integrated double-layer gears, and the large gear is an input gear and the small gear is an output gear. The large gear of each gear is engaged with the small gear of the adjacent gear in the X-axis direction to form a gear reduction structure.

[0048] The output gear 212 is engaged with the large gear of the first gear 221 in the X-axis direction, the small gear of the first gear 221 is engaged with the large gear of the second gear 222 in the X-axis direction, the small gear of the second gear 222 is engaged with the large gear of the third gear 223 in the X-axis direction, the small gear of the third gear 223 is engaged with the large gear of the fourth gear 224 in the X-axis direction, the small gear of the fourth gear 224 is engaged with the large gear of the fifth gear 225 in the X-axis direction, and the small gear of the fifth gear 225 is engaged with the transmission disc 23 in the Y-axis direction. The first gear 221, the second gear 222, the third gear 223, the fourth gear 224, and the fifth gear 225 form a stepped climbing area to transfer kinetic energy through a layer-by-layer climbing arrangement.

[0049] The first gear 221, the second gear 222, and the third gear 223 are arranged in the positive direction of the X-axis and are arranged in a stepped arrangement in the Z-axis direction in a layer-by-layer or multi-stage incremental manner. The second gear 222, the third gear 223, the fourth gear 224, and the fifth gear 225 are alternately engaged in the positive and negative directions of the X-axis and are arranged in a stepped arrangement in the Z-axis direction in a layer-by-layer or multi-stage incremental manner. The fourth gear 224 is located directly above the second gear 222 in the Z-axis direction, the fifth gear 225 is located directly above the third gear 223 in the Z-axis direction, and the first gear 221, the fourth gear 224, and the fifth gear 225 are arranged in a stepped arrangement in the Z-axis direction in a layer-by-layer or multi-stage incremental manner. The layer-by-layer or multi-stage incremental stepped arrangement can efficiently transfer kinetic energy and stably reduce output, and can reliably and effectively improve the service life of the electric operating mechanism.

[0050] The first gear 221 is rotationally fixed on the first shaft 226, the second gear 222 and the fourth gear 224 are coaxially rotationally fixed on the second shaft 227, the third gear 223 and the fifth gear 225 are coaxially arranged and rotationally fixed on the third shaft 228, the gear set 22 is coaxially fixed by a plurality of gears in the stepped climbing area, which reduces the fitting gap between the gears and increases the stability of the gear fitting; the first shaft 226, the second shaft 227, and the third shaft 228 are arranged in a straight line, that is, the centers of the output gear 212, the first gear 221, the second gear 222, and the third gear 223 are all on the X-axis, which ensures that the kinetic energy is transmitted in a way that causes less damage and minimal gear wear.

[0051] The first gear 221, the second gear 222, the third gear 223, the fourth gear 224, and the fifth gear 225 can adopt the same size of gear structure, which can reduce the investment of mold, reduce the number of parts, and reduce production and operation cost. The first gear 221, the second gear 222, the third gear 223, the fourth gear 224, and the fifth gear 225 can also adopt different sizes of gear structure, which can obtain stable kinetic energy according to user requirements.

[0052] As shown in Figures 4-8 The transmission disc 23 is a single-layer gear structure and is located in the Y-axis direction of the gear set 22. The periphery of the transmission disc 23 is provided with a toothed structure and is engaged with the gear set 22; the center of the transmission disc 23 is provided with an annular ratchet structure and is sleeved on the operating rod 24 to drive the operating rod 24 to rotate synchronously in one direction. The transmission disc 23 can be integrally arranged with the operating rod 24. When the handle 7 acts on the operating rod 24 and drives the operating rod 24 to continue to rotate in the same direction, the ratchet structure of the transmission disc 23 has a forward separation function, so the operating rod 24 cannot drive the transmission disc 23 to continue to rotate in the same direction. The transmission disc 23 plays a role in changing the direction of the kinetic energy of the drive module 2 and separating the transmission disc 23.

[0053] As shown in Figures 3-6The operating rod 24 includes an operating part 241, a rotating shaft part 242, and a thimble part 243, as shown in FIG. 8. The operating part 241 is sleeved on one end of the rotating shaft part 242 and is located directly above the rotating shaft part 242 along the Z-axis direction. The operating part 241 is located in the first cavity 121, and the upper cover 14 is provided with a corresponding through hole. The handle 7 passes through the through hole and is inserted into the operating part 241 in the first cavity 121 for manual operation. In order to facilitate the user to select, the circuit breaker can be controlled to be tripped or closed at any time by manual operation in the power-off state, so as to maintain the safety of the power distribution line. The thimble part 243 is inserted into the middle shaft column of the rotating shaft part 242 and is located in the second cavity 122. A compression spring is arranged between one end of the thimble part 243 and the rotating shaft part 242. Under the action of the compression spring, the other end of the thimble part 243 extends out of the shaft column of the rotating shaft part 242. The rotating shaft part 242 penetrates through the first cavity 121 and the second cavity 122. The transmission disc 23 is sleeved on the middle part of the rotating shaft part 242 and abuts against the other end of the thimble part 243. The other end of the thimble part 243 and the ratchet structure in the center of the transmission disc 23 realize that the transmission disc 23 can only drive the operating rod 24 to rotate in one direction, and the transmission disc 23 and the operating rod 24 are in engagement and disengagement. The bottom of the rotating shaft part 242 along the Z-axis direction is connected with the sliding module 3 synchronously. The sliding module 3 is located below the operating rod 24 along the Z-axis direction.

[0054] The motor 21 sequentially drives the first gear 221, the second gear 222, the third gear 223, the fourth gear 224, the fifth gear 225, the transmission disc 23, and finally the operating rod 24 to transmit kinetic energy to the sliding module 3.

[0055] The operating rod 24 is coaxially arranged with the transmission disc 23 and is located above the transmission disc 23 along the Z-axis direction. The operating rod 24 can drive the transmission disc 23 to rotate synchronously, and can also drive the sliding module 3 to move.

[0056] As Figure 5 、 8 -10, the sliding module 3 is located below the transmission disc 23 along the Z-axis direction. The sliding module 3 includes a rotating disc 31, a stroke amplification mechanism, a sliding block 34, a guide rail 35, and a spring 36. The stroke amplification mechanism includes a first lever 32 and a second lever 33.

[0057] The rotating disc 31 is fixed to the lowermost end of the rotating shaft part 242 along the Z-axis direction, and rotates synchronously and in the same direction with the operating rod 24. The rotating disc 31 comprises a central hole 311 and a rotating shaft 312. The central hole 311 can be a polygonal hole or a waist round hole, and is sleeved and fixed to the bottom of the rotating shaft part 242 along the Z-axis direction. The rotating shaft 312 is located at the rotating circumferential end of the rotating disc 31 and rotates around the Z-axis as the center of rotation along with the rotation of the central hole 311.

[0058] The first lever 32 is in a strip structure, one end of which is rotatably fixed to the rotating shaft 312, and the other end is rotatably fixed to the second lever 33. A through hole is arranged in the middle part of the first lever 32 for fixing one end of the spring 36. The first lever 32 moves back and forth along the X-axis direction with a small amplitude following the rotation of the rotating shaft 312.

[0059] The second lever 33 is in a strip structure or a herringbone structure, comprising a fixed end 331, an action part 332 and a driving end 333. The fixed end 331 is located at one end of the second lever 33 and is rotatably fixed to the bracket 13 and the base 11. The second lever 33 rotates back and forth along the X-axis direction with the fixed end 331 as the center. The action part 332 is located in the middle part of the second lever 33, and the first lever 32 is rotatably fixed to the action part 332. The driving end 333 is located at the other end of the second lever 33, and a rotating shaft is arranged on the driving end 333 for cooperation with the sliding block 34.

[0060] The first lever 32 rotates the second lever 33 with the fixed end 331 as the center of rotation by acting on the middle part of the second lever 33, and drives the driving end 333 to move back and forth along the X-axis direction with an increased amplitude, that is, the function of increasing the movement stroke is realized. At the same time, the simple and easy stroke amplification through multiple connecting rods can make the electric operating mechanism more miniaturized.

[0061] The fixed end 331, the action part 332 and the driving end 333 can be located on a straight line, constituting the second lever 33 in a strip structure.

[0062] The fixed end 331, the action part 332 and the driving end 333 can not be located on a straight line, constituting the second lever 33 in a herringbone structure.

[0063] The slider 34 comprises a sliding body 341, an input slot 342, and an output slot 343. The sliding body 341 is provided with a guide slot adapted to the guide rail 35 in the X-axis direction, so that the slider 34 can flexibly slide back and forth in the X-axis direction; the input slot 342 is located at the top of the slider 34 in the Z-axis direction, used to cooperate with the driving end 333, when the driving end 333 moves back and forth in the X-axis direction, it can act on the slot wall of the input slot 342, so that the slider 34 obtains a power in the X-axis direction; the output slot 343 is located at the bottom of the slider 34 in the Z-axis direction, used for power output of the electric operating mechanism, generally cooperates with the operating handle of the circuit breaker, drives the operating handle to move back and forth, so as to realize driving the circuit breaker to close or open.

[0064] The guide rail 35 is arranged on the U-shaped cavity wall of the support 13 in the X-axis direction, and at least two guide rails are arranged in parallel in the X-axis direction, so as to increase the movement stability of the slider 34.

[0065] The spring 36 is a tension spring, which can also be a compression spring, used to drive the first lever 32 to reset to the initial state without external power, limit the movement of the first lever 32, so as to realize that the components of the sliding module 3 remain a relatively static state, and the internal components will not collide because of external small shaking, which protects each component. The spring 36 provides a power for the first lever 32 to reset to the initial position, so as to prevent the first lever 32 from driving other components of the sliding rod module 3 to move back and forth inside the electric operating mechanism.

[0066] The rotating disc 31 drives the slider 34 to move back and forth in the X-axis direction on the guide rail 35 through the first lever 32 and the second lever 33 in turn.

[0067] The rotating disc 31 is coaxially arranged with the transmission disc 23 and the operating part 241 and rotates synchronously, that is, the electric motor 21 or the handle 7 can drive the sliding module 3 to move, realizing electric operation or manual operation.

[0068] The first lever 32 moves back and forth in the X-axis direction under the rotation of the rotating disc 31, and then acts on the middle part of the second lever 33, amplifies the movement stroke through the bearing at the end of the second lever 33, further acts on the movable slot of the slider 34, and finally drives the slider 34 to move back and forth along the guide rail 35 in the X-axis direction.

[0069] The above is further detailed description of the utility model in combination with specific preferred embodiments, and cannot be deemed as limitation of the specific implementation of the utility model to these descriptions. For ordinary skilled person in the technical field of the utility model, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be deemed as belonging to the protection scope of the utility model.

Claims

1. An electrically operated mechanism, comprising a housing, a driving module arranged in the housing, a sliding module, the driving module and the sliding module being arranged in parallel, the driving module comprising an electric motor, a gear set, a transmission disc, the electric motor transmitting kinetic energy to the sliding module through the gear set and the transmission disc in sequence, characterized in that: The gear set is arranged in a stepped manner along the X-axis direction and in multiple layers along the Z-axis direction.

2. An electrically operated mechanism according to claim 1, characterised in that: At least some gears of the gear set arranged along the Z-axis direction are coaxially arranged.

3. An electrically operated mechanism according to claim 1, characterised in that: The axis of the motor is parallel to the Z-axis direction and transmits kinetic energy to the gear set along the X-axis direction.

4. An electrically operated mechanism according to claim 1, characterised in that: The transmission disc is located in the Y-axis direction of the gear set and engages with the gear set.

5. An electrically operated mechanism according to claim 1, characterised in that: The gear set includes a first gear, a second gear and a third gear, which engage with each other and have their centers on the X-axis.

6. An electrically operated mechanism according to claim 5, characterised in that: The gear set includes a fourth gear, which is coaxially arranged with the second gear.

7. An electrically operated mechanism according to claim 5, wherein: The gear set includes a fifth gear, which is coaxially arranged with the third gear.

8. An electrically operated mechanism according to claim 6 or 7, characterised in that: The gears of the gear set are integrated double-layer gears with one large gear and one small gear.

9. An electrically operated mechanism according to claim 1, characterised in that: The transmission disc is located above the sliding module along the Z-axis direction and is connected with the sliding module.

10. An electrically operated mechanism according to claim 5, characterised in that: The transmission disc rotates in one direction and drives the sliding module to move back and forth along the X-axis direction.

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