Operating mechanism and switching device

Abstract

The invention relates to the field of low-voltage electric appliances, in particular to an operating mechanism and a switching device, the operating mechanism comprises an opening assisting structure, the opening assisting structure can apply opening assisting force to a rotating shaft of the operating mechanism before, when or after a main spring of the operating mechanism starts to release energy, and the opening assisting force enables the rotating shaft to rotate towards an opening position. Therefore, the operation mechanism and the switching device can be ensured to successfully carry out opening operation.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to an operating mechanism and a switching electrical appliance including the operating mechanism. Background Art

[0002] In the existing rotary disconnector, after actual use (for example, after multiple live opening operations), the friction force between the moving and static contacts in the plug-in fit increases (even welding occurs). When manually opening the switch through the operating mechanism, it may occur that the energy storage spring of the operating mechanism fails to successfully drive the moving and static contacts to break, resulting in the failure of the opening operation. Summary of the Invention

[0003] The purpose of the present invention is to overcome at least one defect of the prior art, and to provide an operating mechanism and a switching electrical appliance including the operating mechanism, in which the mechanism body and the opening assist structure ensure that the rotating shaft can successfully rotate to the opening position, ensuring the successful opening of the operating mechanism.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An operating mechanism includes a mechanism body and a rotating shaft for drivingly connecting with the moving contact mechanism of a switching electrical appliance. The rotating shaft is rotatably arranged around the axis o-o and is located on one side of the mechanism body in the direction of the axis o-o. The mechanism body includes a body bracket, a rocker arm and a main shaft rotatably arranged around the axis o1-o1 and the axis o-o on the body bracket respectively, a transmission structure drivingly connected with the main shaft and the rocker arm respectively, a connecting rod structure arranged on the body bracket and drivingly connected with the rotating shaft, and a main spring with two ends respectively connected with the rocker arm and the connecting rod structure and used for providing opening and closing driving forces; the axis o-o and the axis o1-o1 are arranged in parallel at an interval; the operating mechanism further includes an opening assist structure drivingly cooperating with the main shaft directly or indirectly, and the opening assist structure includes an assisting part moving in a circular motion around the axis o-o.

[0006] When the operating mechanism opens, the main shaft is driven by an external force to rotate. The rotating shaft drives the rocker arm to rotate through the transmission structure. After the rocker arm drives the main spring to act to the maximum energy storage position, when the main shaft continues to rotate and drives the main spring to cross the maximum energy storage position through the rocker arm, the main spring starts to release energy and drives the rotating shaft to rotate towards the opening position through the connecting rod structure; the assisting part applies an opening auxiliary force to the rotating shaft to make it rotate towards the opening position before or when or after the main spring starts to release energy.

[0007] Further, the opening assist structure includes an assisting turntable. The assisting turntable includes a turntable body rotatably arranged around the axis o-o and an assisting part arranged on the turntable body. The turntable body is drivingly connected with the main shaft directly or indirectly.

[0008] Furthermore, the turntable body is arranged on the main shaft and rotates synchronously with the main shaft.

[0009] Furthermore, the gate-opening assist structure also includes an assist link, which is respectively connected to the turntable body and the rocker arm transmission structure; the main shaft drives the rocker arm to rotate through the gate-opening assist structure and the transmission structure at the same time.

[0010] Furthermore, the transmission structure and the brake-opening assisting structure are respectively arranged on both sides of the main body bracket, and the brake-opening assisting structure is located between the main body bracket and the rotating shaft.

[0011] Furthermore, the turntable body and the power-assisting part are split structures, and the power-assisting part is a shaft rod connected to the turntable body at one end; the turntable body includes a turntable mounting hole, a turntable socket and a turntable connecting hole, the turntable body is sleeved on the main shaft through the turntable mounting hole, the shaft rod is inserted into the turntable socket hole, and the turntable body is hinged to the power-assisting connecting rod through the turntable connecting hole.

[0012] Furthermore, the turntable body and the power-assisting part are an integrated structure, and one end of the power-assisting part is connected to the edge of the turntable body by a bend; the turntable body includes a turntable mounting hole and a turntable connecting hole, the turntable body is sleeved on the main shaft through the turntable mounting hole, and the turntable body is hinged to the power-assisting connecting rod through the turntable connecting hole.

[0013] Furthermore, the brake opening assist structure is arranged between the main body bracket and the rotating shaft.

[0014] Furthermore, the rotating shaft includes a rotating shaft matching portion; when the operating mechanism opens the gate, the assisting portion abuts against the rotating shaft matching portion before, when, or after the main spring starts to release energy.

[0015] Furthermore, the shaft includes a shaft arc groove arranged on the side facing the mechanism body, one end of the power assisting part is inserted into the shaft arc groove, and one end of the shaft arc groove is provided with a shaft stop surface serving as a shaft matching part.

[0016] Furthermore, when the operating mechanism is opened, when the rocker arm drives the main spring to move to the maximum energy storage position, the position of the rocker arm is the critical position;

[0017] After the rocker arm continues to rotate past the first angle from the critical position, the main spring begins to release energy and drives the rotating shaft to rotate toward the opening position through the connecting rod structure.

[0018] Furthermore, when the operating mechanism opens the gate, after the rocker arm continues to rotate from the critical position to a second angle, the power assisting portion begins to apply an opening auxiliary force to the rotating shaft; the first angle ≤ the second angle.

[0019] Furthermore, 5°≤the second angle≤25°.

[0020] Furthermore, 0°<first angle≤30°.

[0021] Further, the first angle is 5°.

[0022] Further, when the operating mechanism is tripped, the assisting portion applies a tripping assisting force to the rotating shaft to rotate it towards the tripping position before the main spring starts to release energy; when the assisting portion 3-11 starts to apply the tripping assisting force to the rotating shaft 13, the included angle between the position of the rocker arm 4 and the position of the rocker arm 4 when the main spring 6 starts to release energy is the third angle, and 0° < the third angle ≤ 15°.

[0023] Further, the link structure includes a trip and a latch that are respectively rotatably arranged on the body bracket and are latched and cooperated, a first link, a second link, a transmission rod, and a transmission shaft; the first link is respectively hinged to the trip and the second link, one end of the main spring is connected to the rocker arm and the other end is connected to the hinge joint of the first link and the second link, the second link is also hinged to the transmission rod to drive it to rotate around the axis o-o, the transmission shaft is arranged on the transmission rod and is arranged parallel and spaced apart from the axis o-o, and one end of the transmission rod is in transmission connection with the rotating shaft.

[0024] Further, the mechanism body further includes a re-latch that is rotatably arranged on the body bracket, and the re-latch is latched and cooperated with the latch; the re-latch is driven by an external force to rotate, the latching cooperation with the latch is released, and the latching cooperation between the latch and the trip is further released, so that the operating mechanism trips.

[0025] For the operating mechanism of the present invention, its main shaft applies a tripping assisting force to the rotating shaft through the tripping assisting structure, which can ensure that the rotating shaft successfully rotates to the tripping position when the torque applied by the main spring to the rotating shaft through the link structure cannot make the rotating shaft rotate to the tripping position.

[0026] In addition, the tripping assisting structure also serves as a transmission structure between the main shaft and the rocker arm, which is beneficial to simplifying the structure of the operating mechanism.

[0027] A switching electrical appliance includes the operating mechanism described above.

[0028] Further, the switching electrical appliance includes a switch body, the switch body includes at least one group of switch units, the switch units are arranged side by side with the operating mechanism along the axis o-o direction, and the rotating shaft is coaxially rotatably arranged and in transmission connection with the moving contact mechanism of the switch unit.

[0029] For the switching electrical appliance with the operating mechanism of the present invention, its operating mechanism ensures successful tripping and ensures electrical safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the switching electrical appliance of the present invention;

[0031] Figure 2It is a schematic diagram of the structure of the operating mechanism of the present invention Figure 1 ;

[0032] Figure 3 It is a schematic diagram of the structure of the operating mechanism of the present invention Figure 2 , showing the power-assisted turntable of the first implementation method;

[0033] Figure 4 It is a sectional projection view of the operating mechanism of the present invention;

[0034] Figure 5 It is a mating view of the transmission shaft, the power-assisted turntable of the first implementation method and the rotating shaft of the present invention;

[0035] Figure 6 It is a schematic structural diagram of the rotating shaft of the present invention;

[0036] Figure 7 It is an exploded view of the power-assisted turntable of the first implementation method of the present invention;

[0037] Figure 8 It is a schematic diagram of the structure of the operating mechanism of the present invention Figure 3 , showing the power-assisted turntable of the second implementation method;

[0038] Figure 9 It is a mating view of the transmission shaft, the power-assisted turntable of the second implementation method and the rotating shaft of the present invention;

[0039] Figure 10 It is a schematic structural diagram of the power-assisted turntable of the second implementation method of the present invention.

[0040] Explanation of reference numerals

[0041] b switch body; c moving contact mechanism; o operating mechanism; h handle; o1 mechanism body; s body bracket, s1 upper side plate, s2 lower side plate, g11 transmission shaft guide hole; 1 main shaft; 2 transmission structure, 2-1 transmission disc, 2-2 transmission connecting rod; 3 opening assist structure, 3-1 power-assisted turntable, 3-10 turntable body, 3-100 turntable mounting hole, 3-101 turntable jack, 3-102 turntable connecting hole, 3-11 assist part, 3-2 assist connecting rod; 4 rocker arm; 5 first connecting rod; 6 main spring; 7 trip latch; 8 lock latch; 9 re-latch; 10 second connecting rod; 11 transmission shaft; 12 transmission rod; 13 rotating shaft, 13-0 rotating shaft jack, 13-1 rotating shaft arc groove, 13-2 rotating shaft stop surface; 14 opening stop block; 15 opening auxiliary spring. Detailed implementation manners

[0042] The following embodiments given in conjunction with the drawings further illustrate the detailed implementation manners of the switching device of the present invention. The switching device of the present invention is not limited to the descriptions of the following embodiments.

[0043] Such as Figures 1-10As shown, this is an embodiment of the switching device of the present invention. The switching device in this embodiment is preferably a change-over switch.

[0044] As Figure 1 shown, the switching device in this embodiment includes an operating mechanism o and a switch body b. The switch body b includes at least one set of switch units. Each switch unit includes a contact system disposed therein. The contact system includes a rotatably disposed moving contact mechanism c and a static contact. The operating mechanism is drivingly connected to the moving contact mechanisms c of each switch unit to drive the moving contact mechanism c to rotate to close and disconnect from the corresponding static contact. Further, the moving contact mechanism c is rotatably disposed about the axis o-o, and the operating mechanism and the switch units of the switch body b are arranged side by side along the axis o-o.

[0045] Specifically, as Figure 1 shown, the switch body b includes two or more sets of switch units. Each set of switch units is stacked together along the axis o-o. The moving contact mechanisms c of each switch unit are drivingly connected in sequence. The operating mechanism o is drivingly connected to the moving contact mechanism c of the switch unit adjacent to the operating mechanism o.

[0046] As another embodiment, the operating mechanism o can also be drivingly connected to the moving contact mechanisms c of each switch unit through a transmission link. For example, the transmission link sequentially passes through the contact supports of each moving contact mechanism c, and one end of the transmission link is drivingly connected to the rotating shaft 13 of the operating mechanism o.

[0047] As Figures 2-4 shown in FIGS. 4 and 5, this is an embodiment of the operating mechanism o.

[0048] The operating mechanism o of this embodiment includes a mechanism body o1 and a rotating shaft 13 for driving connection with the moving contact mechanism c of a switching device. The rotating shaft 13 is rotatably arranged around the axis o-o and is located on one side of the mechanism body o1 in the direction of the axis o-o. That is to say, the mechanism body o1 and the rotating shaft 13 are arranged side by side along the axis o-o. The mechanism body o1 includes a body bracket s, a rocker arm 4 and a main shaft 1 that are respectively rotatably arranged around the axis o1-o1 and the axis o-o on the body bracket s, a transmission structure 2 that is respectively in driving connection with the main shaft 1 and the rocker arm 4 (that is, the main shaft 1 is in driving connection with the rocker arm 4 through the transmission structure 2 to drive the rocker arm 4 to rotate around the axis o1-o1), a connecting rod structure arranged on the body bracket s and in driving connection with the rotating shaft 13, and a main spring 6 with two ends respectively connected to the rocker arm 4 and the connecting rod structure and used to provide opening and closing driving forces; the axis o-o and the axis o1-o1 are arranged in parallel at an interval; when the operating mechanism o opens or closes, the main shaft 1 is driven by an external force to rotate. The main shaft 1 drives the rocker arm 4 to rotate at least through the transmission structure 2. The rocker arm 4 first drives the main spring 6 to move to the maximum energy storage position. At this time, the main spring 6 stores energy to the maximum value and the position where the rocker arm 4 is located is the critical position. The rocker arm 4 continues to rotate to drive the main spring 6 to cross the maximum energy storage position to release the energy of the main spring 6. The main spring 6 then drives the rotating shaft 13 to rotate towards the opening position through the connecting rod structure. The rotating shaft 13 drives the moving contact mechanism c of the switch unit to rotate to open or close each switch unit, that is, to open or close the switching device. Further, when the operating mechanism o opens or closes, after the rocker arm 4 drives the main spring 6 to move to the maximum energy storage position, the rocker arm 4 continues to rotate through a first angle (that is, the rocker arm 4 drives the main spring 6 to cross the maximum energy storage position), and then the main spring 6 starts to release energy and drives the rotating shaft 13 to rotate towards the opening position through the connecting rod structure; preferably, 0° < the first angle ≤ 30°. Further, the first angle is 5°.

[0049] Further, as Figure 1 shown, the operating mechanism o of this embodiment further includes a handle h. The handle h is connected to the main shaft 1, and the external force drives the main shaft 1 to rotate through the handle h. Further, the handle h and the rotating shaft 13 are respectively located on both sides of the mechanism body o1, that is, respectively located on both sides of the body bracket s.

[0050] Further, as Figures 2-4, as shown in FIGS. 7 and 8, the link structure includes a toggle 7 and a latch 8 that are respectively rotatably arranged on the body bracket s and are snap-fitted, a first link 5, a second link 10, a transmission rod 12, and a transmission shaft 11; the first link 5 is respectively hinged to the toggle 7 and the second link 10, one end of the main spring 6 is connected to the rocker arm 4 and the other end is connected to the hinge joint of the first link 5 and the second link 10, the second link 10 is also hinged to the transmission rod 12 to drive it to rotate around the axis o-o, the transmission shaft 11 is arranged on the transmission rod 12 and is arranged in parallel and spaced apart from the axis o-o, one end of the transmission rod 11 is in transmission connection with the rotating shaft 13, and the transmission rod 11 makes a circular motion around the axis o-o to drive the rotating shaft 13 to rotate around the axis o-o. Further, one end of the toggle 7 is rotatably arranged on the body bracket s and the other end is snap-fitted with the latch 8, one end of the first link 5 is hinged to the middle of the toggle 7 and the other end is hinged to one end of the second link 10, the other end of the second link 10 is hinged to one end of the transmission rod 12, the middle of the transmission rod 12 is rotatably arranged around the axis o-o, and the other end of the transmission rod 12 is provided with the transmission shaft 11; the end of the main spring 6 connected to the rocker arm 4 and the end of the main spring 6 connected to the hinge joint of the first link 5 and the second link 10 are respectively located on both sides of the toggle 7; when the main spring 6 is in the maximum energy storage position, the hinge joint of the first link 5 and the second link 10 is located on the geometric axis of the main spring 6.

[0051] Further, as Figures 2-4 , as shown in FIGS. 7 and 8, the mechanism body o1 further includes a re-latch 9 rotatably arranged on the body bracket s, and the re-latch 9 is snap-fitted with the latch 8; the re-latch 9 is driven by an external force to rotate, releasing the snap-fitting with the latch 8, and then the snap-fitting between the latch 8 and the toggle 7 is released, causing the toggle of the operating mechanism o to trip. It should be noted that the external force driving the re-latch 9 to rotate can come from a short-circuit protection mechanism, an overload protection mechanism, or a flux release for realizing remote opening control. The short-circuit protection mechanism is an electromagnetic actuator, and the overload protection mechanism includes a bimetal sheet. The short-circuit protection mechanism and the overload protection mechanism can be arranged separately or can be set as an integrated thermal-magnetic protection mechanism, and both can be realized through the prior art. During the opening, closing, tripping, and re-latching processes of the operating mechanism o, the action principles of the mechanism body o1 and the rotating shaft 13 are the same as those of the prior art and will not be described in detail here.

[0052] Further, as Figure 2 shown, the transmission structure 2 includes a transmission disk 2-1 and a transmission link 2-2. The transmission disk 2-1 is arranged on the main shaft 1 and rotates synchronously with it coaxially. The transmission disk 2-1 is in transmission connection with the transmission link 2-2, and the transmission link 2-2 is in transmission connection with the rocker arm 4. Specifically, one end of the transmission link 2-2 is hinged to the transmission disk 2-1 and the other end is hinged to the rocker arm leg of the rocker arm 4; the main shaft 1 is driven by an external force to rotate, driving the transmission disk 2-1 to rotate, and the transmission disk 2-1 drives the rocker arm 4 to rotate through the transmission link 2-2.

[0053] Further, such as Figures 1-4 As shown in , 8, the main body bracket s includes two bracket side plates arranged relatively at intervals, namely, the upper side plate s1 and the lower side plate s2; the connecting rod structure, the main spring 6, and the buckle 9 are all arranged between the upper side plate s1 and the lower side plate s2. Further, the upper side plate s1 and the lower side plate s2 are both provided with a transmission shaft guide hole g11, and the transmission shaft 11 is inserted into the transmission shaft guide hole g11, and the shape of the transmission shaft guide hole g11 matches the moving trajectory of the transmission shaft 11.

[0054] Further, the rocker arm 4 is a U-shaped structure, which includes a rocker arm crossbeam and a rocker arm leg, the two rocker arm legs are arranged opposite to each other and are respectively connected to the rocker arm crossbeam by bending, and the rocker arm 4 is rotatably arranged on the upper side plate s1 and the lower side plate s2 through the two rocker arm legs; one end of the main spring 6 is connected to the rocker arm crossbeam and the other end is connected to the hinge of the first connecting rod 5 and the second connecting rod 10. Further, the two rocker arm legs are respectively located on both sides of the upper side plate s1 and the lower side plate s2.

[0055] like Figure 3 , 5 -10, the operating mechanism o also includes a brake-opening assisting structure 3 which is directly or indirectly coupled to the main shaft 1, and the brake-opening assisting structure 3 includes an assisting portion 3-11 which performs circular motion around the axis oo. That is, when the main shaft 1 is driven by an external force to rotate around the axis oo, the brake-opening assisting structure 3 is simultaneously driven to move so that the assisting portion 3-11 performs circular motion around the axis oo. In simple terms, when the main shaft 1 is driven by an external force to rotate, the assisting portion 3-11 is simultaneously driven to perform circular motion around the axis oo.

[0056] The following is a first matching mode between the brake-opening assist structure 3 and the rotating shaft 13:

[0057] When the operating mechanism o trips, the main shaft 1 is driven by an external force to rotate the rocker arm 4. After the rocker arm 4 drives the main spring 6 to act to the maximum energy storage position, the main shaft 1 continues to rotate and drives the main spring 6 to pass over the maximum energy storage position through the rocker arm 4. Then, the main spring 6 starts to release energy and drives the rotating shaft 13 to rotate towards the tripping position through the link structure. The assisting part 3-11 starts to apply a tripping auxiliary force to the rotating shaft 13 to make it rotate towards the tripping position before the main spring 6 starts to release energy. The statement that "the assisting part 3-11 applies a tripping auxiliary force to the rotating shaft 13 to make it rotate towards the tripping position before the main spring 6 starts to release energy" means that the moment when the assisting part 3-11 applies the tripping auxiliary force to the rotating shaft 13 is before the moment when the main spring 6 starts to release energy. That is to say, before the main spring 6 starts to release energy, the tripping assisting structure 3 starts to act under the drive of the main shaft 1 and applies a tripping auxiliary force to the rotating shaft 13 to make it rotate towards the tripping position. It should be noted that before the main spring 6 starts to release energy, the angle by which the assisting part 3-11 drives the rotating shaft 13 to rotate will not cause the moving contact mechanism c to disconnect from the static contact. Further, when the assisting part 3-11 starts to apply the tripping auxiliary force to the rotating shaft 13, the included angle between the position of the rocker arm 4 and the position of the rocker arm 4 when the main spring 6 starts to release energy is the third angle, and 0° < the third angle ≤ 15°. That is to say, when the operating mechanism trips, when the rocker arm 4 still needs to rotate through the third angle to drive the main spring 6 to pass over the maximum energy storage position, the assisting part 3-11 starts to apply the tripping auxiliary force to the rotating shaft 13.

[0058] The above cooperation mode between the tripping assisting structure 3 and the rotating shaft 13 enables the tripping assisting structure 3 to drive the moving contact mechanism c to perform a pre-action towards its tripping position through the rotating shaft 13 before the main spring 6 starts to release energy. Thus, when the main spring 6 releases energy and drives the rotating shaft 13 to rotate, the resistance applied by the moving contact mechanism c to the rotating shaft 13 is reduced, ensuring the success of the tripping operation.

[0059] The following is the second cooperation mode between the tripping assisting structure 3 and the rotating shaft 13:

[0060] When the operating mechanism O trips, the main shaft 1 is driven by an external force to rotate the rocker arm 4. After the rocker arm 4 drives the main spring 6 to act to the maximum energy storage position, the main shaft 1 continues to rotate and drives the main spring 6 to cross the maximum energy storage position through the rocker arm 4. Then, the main spring 6 starts to release energy and drives the rotating shaft 13 to rotate towards the tripping position through the link structure. The assisting part 3-11 applies a tripping auxiliary force to the rotating shaft 13 to make it rotate towards the tripping position when or after the main spring 6 starts to release energy. The statement that "the assisting part 3-11 applies a tripping auxiliary force to the rotating shaft 13 when the main spring 6 starts to release energy" means that the moment when the assisting part 3-11 applies the tripping auxiliary force to the rotating shaft 13 is the same as the moment when the main spring 6 starts to release energy. The statement that "the assisting part 3-11 applies a tripping auxiliary force to the rotating shaft 13 after the main spring 6 starts to release energy" means that the moment when the assisting part 3-11 applies the tripping auxiliary force to the rotating shaft 13 is after the moment when the main spring 6 starts to release energy. That is to say, when the main shaft 1 is driven by an external force to trip the operating mechanism O, the main shaft 1 rotates under the action of the external force, the main shaft 1 drives the rocker arm 4 to rotate, and when the rocker arm 4 drives the main spring 6 to act to the maximum energy storage position, the position where the rocker arm 4 is located is the critical position: after the rocker arm 4 continues to rotate through the first angle from the critical position, the main spring 6 starts to release energy and drives the rotating shaft 13 to rotate towards the tripping position through the link structure; after the rocker arm 4 continues to rotate through the second angle from the critical position, the assisting part 3-11 starts to apply a tripping auxiliary force to the rotating shaft 13. The first angle ≤ the second angle. When the first angle = the second angle, the assisting part 3-11 starts to apply a tripping auxiliary force to the rotating shaft 13 when the main spring 6 starts to release energy. When the first angle < the second angle, the assisting part 3-11 starts to apply a tripping auxiliary force to the rotating shaft 13 after the main spring 6 starts to release energy. The first angle ≤ the second angle ensures that the tripping assisting structure 3 does not act on the rotating shaft 13 before the main spring 6 starts to release energy.

[0061] Specifically, when the main shaft 1 is driven by an external force to trip the operating mechanism O, the main shaft 1 is driven by the external force to rotate, the main shaft 1 drives the rocker arm 4 to rotate, and after the rocker arm 4 drives the main spring 6 to act to the maximum energy storage position, the rocker arm 4 continues to rotate and drives the main spring 6 to cross the maximum energy storage position, and the main spring 6 starts to release energy. Subsequently, the following two situations will occur:

[0062] Situation 1: If the torque output by the main spring 6 to the rotating shaft 13 through the link structure when releasing energy is greater than the torque applied by the switch body b of the switch device to the rotating shaft 13 (for example, if the moving contact and the static contact in the contact system of the switch unit of the switch body b are in plug-in cooperation, the acting force of this torque mainly comes from the frictional force between the moving and static contacts), then the main spring 6 can drive the rotating shaft 13 to rotate to the tripping position so that the switch device can trip normally.

[0063] Case 2: When the operating mechanism is opened, if the moving contact and the static contact in the contact system of the switch body b are welded or the friction force increases abnormally, the torque applied by the switch body b to the rotating shaft 13 is greater than the torque applied by the main spring 6 to the rotating shaft 13 through the connecting rod structure, that is, the energy released by the main spring 6 cannot drive the rotating shaft 13 to rotate or cannot rotate to the opening position (that is, the main spring 6 can drive the rotating shaft 13 to rotate a certain angle to the opening position but stops rotating during the rotation to the opening position, and the main spring 6 cannot Continue to drive the rotating shaft 13 to rotate), at this time the main spring 6 cannot rotate the rotating shaft 13 to the opening position and cannot open the switch. At this time, the external force can drive the main shaft 1 to continue to rotate, and the main shaft 1 drives the opening assisting structure 3 to operate. The opening assisting structure 3 applies an opening auxiliary force to the rotating shaft 13 through the assisting part 3-11, so that the rotating shaft 13 can rotate to the opening position under the joint action of the main spring 6 and the opening assisting structure 3, and then the switch is opened, thereby avoiding the failure of the opening operation of the operating mechanism o and ensuring the safety of electricity use. That is, the opening assisting structure is used to ensure that the operating mechanism can reliably complete the opening operation under the second situation.

[0064] Furthermore, 0°<first angle ≤30°. In the present embodiment, the first angle is preferably 5°, which can prevent the main spring 6 from losing too much energy before driving the rotating shaft 13 to rotate through the connecting rod structure, and can also improve the energy release efficiency of the main spring 6 so that the rotating shaft 13 obtains a larger initial acceleration, thereby avoiding the occurrence of arcs or reducing the probability of arcs.

[0065] Furthermore, 0°<second angle≤30°. Furthermore, 5°≤second angle≤25°, which reserves enough space for the main spring 6 to release energy, so that the main spring 6 can play a role in the opening process of the operating mechanism to the greatest extent.

[0066] Further, such as Figure 3 and 8 As shown, the main shaft 1 is directly connected to the gate-opening assisting structure 3 by transmission. Further, the gate-opening assisting structure 3 includes an assisting turntable 3-1, and the assisting turntable 3-1 includes a turntable body 3-10 that is arranged to rotate around the axis oo and an assisting part 3-11 arranged on the turntable body 3-10, that is, the turntable body 3-10 is arranged to rotate coaxially with the main shaft 1 and the rotating shaft 13, and the assisting part 3-11 is arranged on one side of the rotation center of the turntable body 3-10, and performs circular motion around the axis oo, and the turntable body 3-10 is directly connected to the main shaft 1 by transmission. Further, the turntable body 3-10 is arranged on the main shaft 1 and rotates synchronously with the main shaft 1. Further, the gate-opening assisting structure 3 is arranged between the main body bracket s and the rotating shaft 13.

[0067] Further, if Figure 3 and 8As shown, the gate-opening assisting structure 3 also includes an assisting connecting rod 3-2, which is respectively connected to the turntable body 3-10 and the rocker arm 4 by transmission, and the main shaft 1 can drive the rocker arm 4 to rotate through the assisting turntable 3-1 and the assisting connecting rod 3-2 in turn, that is, the assisting turntable 3-1 and the assisting connecting rod 3-2 cooperate to be equivalent to another set of transmission structures 2. Further, the two ends of the assisting connecting rod 3-2 are respectively hinged to the turntable body 3-10 and the rocker arm 4. Specifically, the main shaft 1 is connected to one rocker arm leg of the rocker arm 4 by transmission structure 2, and is connected to the other rocker arm leg of the rocker arm 4 by the gate-opening assisting structure 3, that is, the main shaft 1 drives the rocker arm 4 to rotate through the transmission structure 2 and the gate-opening assisting structure 3 at the same time; the transmission structure 2 and the gate-opening assisting structure 3 are respectively located on both sides of the main body bracket s (that is, the transmission structure 2 and the gate-opening assisting structure 3 are respectively located on both sides of the upper side plate s and the lower side plate s2), and the gate-opening assisting structure 3 is located between the main body bracket s and the rotating shaft 13. The above structural design is conducive to simplifying the structure of the operating mechanism o and ensuring the transmission reliability and efficiency between the main shaft 1 and the rocker arm 4.

[0068] As another embodiment, the mechanism body o1 is provided with two sets of transmission structures 2, and the two sets of transmission structures 2 are respectively arranged on both sides of the upper side plate s1 and the lower side plate s2; the gate-opening assisting structure 3 is a structure independently arranged from the two sets of transmission structures 2, and the gate-opening assisting structure 3 does not need to be provided with an assisting connecting rod 3-2.

[0069] like Figure 3 and 7 As shown, it is the first implementation of the power-assisted turntable 3-1: the turntable body 3-10 and the power-assisted part 3-11 are split structures, and the power-assisted part 3-11 is a shaft rod connected to the turntable body 3-10 at one end. Further, the turntable body 3-10 includes a turntable mounting hole 3-100 and a turntable plug hole 3-101, and the turntable body 3-10 is sleeved on the main shaft 1 through the turntable mounting hole 3-100. The turntable mounting hole 3-100 is provided with a mounting hole limiting surface, and the main shaft 1 is provided with a main shaft limiting surface. The mounting hole limiting surface and the main shaft limiting surface cooperate to realize the synchronous rotation of the turntable body 3-10 and the main shaft 1, and one end of the power-assisted part 3-11 is inserted into the turntable plug hole 3-101. Further, the turntable body 3-10 also includes a turntable connecting hole 3-102, and the turntable body 3-10 is hinged to the power-assisted connecting rod 3-2 through the turntable connecting hole 3-102. Furthermore, the turntable mounting hole 3-100, the turntable insertion hole 3-101 and the turntable connecting hole 3-102 are distributed at the three vertices of a triangle.

[0070] like Figure 8 and 10As shown, it is a second implementation method of the power-assisted turntable 3-1: the turntable body 3-10 and the power-assisted part 3-11 are an integrated structure, and one end of the power-assisted part 3-11 is connected to the edge of the turntable body 3-10 by bending. Further, the turntable body 3-10 includes a turntable mounting hole 3-100, and the turntable body 3-10 is sleeved on the main shaft 1 through the turntable mounting hole 3-100, and the turntable mounting hole 3-100 is provided with a mounting hole limiting surface, and the main shaft 1 is provided with a main shaft limiting surface, and the mounting hole limiting surface and the main shaft limiting surface cooperate to realize the synchronous rotation of the turntable body 3-10 and the main shaft 1. Further, the turntable body 3-10 and the power-assisted part 3-11 are formed by punching and bending metal sheets, or the turntable body 3-10 and the power-assisted part 3-11 are an integrated injection molded part, and the injection molded part can be made of metal or high-strength non-metallic material. Further, the turntable body 3-10 also includes a turntable connection hole 3-102, and the turntable body 3-10 is hinged to the power-assisting connecting rod 3-2 through the turntable connection hole 3-102. Further, the turntable mounting hole 3-100, the turntable connection hole 3-102 and the power-assisting part 3-12 are arranged at the three vertices of a triangle.

[0071] As other embodiments, the brake-opening assist structure 3 is indirectly coupled with the main shaft 1 in transmission. For example, the turntable body 3-10 of the assist turntable 3-1 is rotatably arranged on the main body bracket s around the axis oo, and the rocker arm 4 drives the assist turntable 3-1 to rotate through the assist link 3-2, thereby causing the assist part 3-11 to act on the rotating shaft 13.

[0072] As other embodiments, the main shaft 1 is not directly connected to the gate-opening assisting structure 3 by transmission, but starts to contact the gate-opening assisting structure 3 and drives the gate-opening assisting structure 3 to move after the main shaft 1 drives the rocker arm 4 to rotate through the second angle; for example, the main shaft 1 is provided with a rocker arm driving part, and the power-assisting turntable 3-1 is provided with a matching part. After the main shaft 1 drives the rocker arm 4 to rotate through the second angle, the rocker arm driving part and the matching part are abutted against each other, thereby driving the power-assisting turntable 3-1 to rotate, and the power-assisting turntable 3-1 then drives the assisting part 3-11 to make a circular motion around the axis oo.

[0073] Further, such as Figures 5-6 As shown in , 9, the rotating shaft 13 includes a rotating shaft matching portion; when the operating mechanism o is opened, the assisting portion 3-11 abuts against the rotating shaft matching portion when or after the main spring 6 starts to release energy.

[0074] Specifically, the rotating shaft 13 includes a rotating shaft arc groove 13-1 provided on the side facing the mechanism body o1. One end of the assisting portion 3-11 is inserted into the rotating shaft arc groove 13-1. Driven by the main shaft 1, the assisting portion 3-11 can perform circular motion within the rotating shaft arc groove 13-1. One end of the rotating shaft arc groove 13-1 is provided with a rotating shaft stop surface 13-2 as the rotating shaft fitting portion. That is, when the operating mechanism o trips, when the main shaft 1 drives the rocker arm 4 to continue rotating through a second angle from the critical position, at the same time, the main shaft 1 drives the assisting portion 3-11 to abut against the rotating shaft stop surface 13-2.

[0075] As another embodiment, the rotating shaft fitting portion may also be a retaining platform provided on the side of the rotating shaft 13 facing the mechanism body o1. The shape of the retaining platform is not specifically limited as long as it can cooperate reliably with the assisting portion 3-11.

[0076] As Figure 6 shown, an embodiment of the rotating shaft 13 is as follows: The rotating shaft 13 is of a disc structure and includes a rotating shaft insertion hole 13-0 and a rotating shaft arc groove 13-1. The rotating shaft insertion hole 13-0 is used for the transmission shaft 11 of the mechanism body o1 to be inserted. The distance between the rotating shaft insertion hole 13-0 and the rotation center of the rotating shaft 13 (i.e., the axis o-o) is greater than the distance between the rotating shaft arc groove 13-1 and the rotation center of the rotating shaft 13. Further, on the side of the rotating shaft 13 facing away from the mechanism body o1, that is, the side facing the switch body, a rotating shaft transmission portion for driving and cooperating with the moving contact mechanism c is provided.

[0077] Further, as Figure 4 shown, the mechanism body o1 further includes a tripping stopper 14. The tripping stopper 14 is provided on the body bracket s. When the operating mechanism o trips, the transmission rod 12 rotates to the tripping position (the transmission rod 12 simultaneously drives the rotating shaft 13 to rotate to the tripping position through the transmission shaft 11) and abuts against the tripping stopper 14 to prevent the transmission rod 12 from continuing to rotate.

[0078] Further, as Figures 2-4 shown in FIGS. 7 and 8, the mechanism body o1 further includes a tripping auxiliary spring 15. The toggle 7 is also provided with a toggle hanging spring portion. The toggle hanging spring portion and the end of the toggle 7 that is latched and cooperated with the latch 8 (this end is the toggle latching end) are respectively located at both ends of the toggle 7. The rotation center of the toggle 7 is located between the toggle hanging spring portion and the toggle latching end. One end of the tripping auxiliary spring 15 is connected to the toggle hanging spring portion and the other end is connected to the body bracket s, applying a force to the toggle 7 to make it rotate towards the tripping position. The toggle 7 then drives the rotating shaft 13 to rotate towards the tripping position through the sequentially connected first link 5, second link 10, transmission rod 12, and transmission shaft 11. The tripping auxiliary spring 15 is beneficial to accelerating the rotation speed of the rotating shaft 13 towards the tripping position and improving the tripping efficiency.

[0079] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is habitually placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating relative importance.

[0080] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. An operating mechanism, which includes a mechanism body (o1) and a rotating shaft (13) for transmission connection with the moving contact mechanism (c) of a switching device. The rotating shaft (13) is rotatably arranged around an axis o-o and is located on one side of the mechanism body (o1) in the direction of the axis o-o. The mechanism body (o1) includes a body bracket (s), a rocker arm (4) and a main shaft (1) rotatably arranged on the body bracket (s) around an axis o1-o1 and an axis o-o respectively, a transmission structure (2) respectively in transmission connection with the main shaft (1) and the rocker arm (4), a connecting rod structure arranged on the body bracket (s) and in transmission connection with the rotating shaft (13), and a main spring (6) with two ends respectively connected to the rocker arm (4) and the connecting rod structure and used to provide closing and opening driving forces; the axis o-o and the axis o1-o1 are arranged in parallel at an interval; it is characterized in that: The operating mechanism further includes a closing assist structure (3) directly or indirectly drivingly engaged with the main shaft (1), and the closing assist structure (3) includes an assisting portion (3-11) that makes a circular motion about the axis o-o; When the operating mechanism performs closing, the main shaft (1) is driven by an external force to rotate. The rotating shaft (13) drives the rocker arm (4) to rotate through the transmission structure (2). After the rocker arm (4) drives the main spring (6) to act to the maximum energy storage position, when the main shaft (1) continues to rotate and drives the main spring (6) to pass beyond the maximum energy storage position through the rocker arm (4), the main spring (6) starts to release energy and drives the rotating shaft (13) to rotate towards the closing position through the link structure; the assisting portion (3-11) applies a closing auxiliary force to the rotating shaft (13) to make it rotate towards the closing position before, during or after the main spring (6) starts to release energy.

2. The operating mechanism according to claim 1, characterized in that: The closing assist structure (3) includes an assisting turntable (3-1). The assisting turntable (3-1) includes a turntable main body (3-10) rotatably arranged about the axis o-o and an assisting portion (3-11) provided on the turntable main body (3-10). The turntable main body (3-10) is directly or indirectly drivingly engaged with the main shaft (1).

3. The operating mechanism according to claim 2, characterized in that: The turntable main body (3-10) is arranged on the main shaft (1) and rotates synchronously with the main shaft (1).

4. The operating mechanism according to claim 3, characterized in that: The closing assist structure (3) further includes an assisting link (3-2). The assisting link (3-2) is respectively drivingly connected with the turntable main body (3-10) and the rocker arm (4); the main shaft (1) drives the rocker arm (4) to rotate through the closing assist structure (3) and the transmission structure (2) at the same time.

5. The operating mechanism according to claim 4, characterized in that: The transmission structure (2) and the closing assist structure (3) are respectively arranged on both sides of the body bracket (s), and the closing assist structure (3) is located between the body bracket (s) and the rotating shaft (13).

6. The operating mechanism according to claim 4, characterized in that: The turntable main body (3-10) and the assisting portion (3-11) are of a split structure. The assisting portion (3-11) is a shaft rod with one end connected to the turntable main body (3-10); the turntable main body (3-10) includes a turntable mounting hole (3-100), a turntable insertion hole (3-101) and a turntable connection hole (3-102). The turntable main body (3-10) is sleeved on the main shaft (1) through the turntable mounting hole (3-100), the shaft rod is inserted into the turntable insertion hole (3-101), and the turntable main body (3-10) is hinged to the assisting link (3-2) through the turntable connection hole (3-102).

7. The operating mechanism according to claim 4, characterized in that: The turntable main body (3-10) and the assisting portion (3-11) are of an integral structure. One end of the assisting portion (3-11) is bent and connected to the edge of the turntable main body (3-10); the turntable main body (3-10) includes a turntable mounting hole (3-100) and a turntable connection hole (3-102). The turntable main body (3-10) is sleeved on the main shaft (1) through the turntable mounting hole (3-100), and the turntable main body (3-10) is hinged to the assisting link (3-2) through the turntable connection hole (3-102).

8. The operating mechanism according to claim 2, characterized in that: The closing assist structure (3) is arranged between the body bracket (s) and the rotating shaft (13).

9. The operating mechanism according to claim 1, characterized in that: The rotating shaft (13) includes a rotating shaft mating portion; when the operating mechanism trips, the boosting portion (3-11) abuts against the rotating shaft mating portion before, during, or after the main spring (6) starts to release energy. The rotating shaft (13) includes a rotating shaft arc groove (13-1) provided on the side facing the mechanism body (o1). One end of the boosting portion (3-11) is inserted into the rotating shaft arc groove (13-1), and a rotating shaft stop surface (13-2) serving as the rotating shaft mating portion is provided at one end of the rotating shaft arc groove (13-1). When the operating mechanism trips, when the rocker arm (4) drives the main spring (6) to move to the maximum energy storage position, the position where the rocker arm (4) is located is the critical position. After the rocker arm (4) continues to rotate through a first angle from the critical position, the main spring (6) starts to release energy and drives the rotating shaft (13) to rotate towards the tripping position through the link structure. When the operating mechanism trips, after the rocker arm (4) continues to rotate through a second angle from the critical position, the boosting portion (3-11) starts to apply a tripping auxiliary force to the rotating shaft (13); the first angle ≤ the second angle. 5° ≤ the second angle ≤ 25°. 0° < the first angle ≤ 30°. The first angle is 5°. When the operating mechanism trips, the boosting portion (3-11) applies a tripping auxiliary force to the rotating shaft (13) to make it rotate towards the tripping position before the main spring (6) starts to release energy; when the boosting portion 3-11 starts to apply the tripping auxiliary force to the rotating shaft 13, the included angle between the position where the rocker arm 4 is located and the position where the rocker arm 4 is located when the main spring 6 starts to release energy is the third angle, 0° < the third angle ≤ 15°. The link structure includes a trip latch (7) and a lock latch (8) that are respectively rotatably provided on the body bracket (s) and are snap-fitted, a first link (5), a second link (10), a transmission rod (12), and a transmission shaft (11); the first link (5) is respectively hinged to the trip latch (7) and the second link (10), one end of the main spring (6) is connected to the rocker arm (4) and the other end is connected to the hinge joint of the first link (5) and the second link (10), the second link (10) is also hinged to the transmission rod (12) to drive it to rotate around the axis o-o, the transmission shaft (11) is provided on the transmission rod (12) and is arranged parallel and spaced from the axis o-o, and one end of the transmission rod (11) is in transmission connection with the rotating shaft (13). The mechanism body (o1) further includes a reclosing latch (9) rotatably provided on the body bracket (s), and the reclosing latch (9) is snap-fitted with the lock latch (8); the reclosing latch (9) is driven by an external force to rotate, the snap-fitting with the lock latch (8) is released, and the snap-fitting between the lock latch (8) and the trip latch (7) is further released, causing the operating mechanism to trip.

10. A switching electrical appliance, characterized in that: The switching electrical apparatus includes the operating mechanism according to any one of claims 1-9. The switching electrical apparatus includes a switch body (b), the switch body (b) includes at least one set of switch units, the switch units and the operating mechanism (o) are arranged side by side along the axis o-o direction, and the rotating shaft (13) is coaxially rotatably provided with and in transmission connection with the moving contact mechanism (c) of the switch unit.

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