Anti-springback operating mechanism

Abstract

An anti-springback operating mechanism comprises a main shaft rotatably arranged on a side plate, the main shaft is used for being connected with a moving contact and can rotate between a closing position and an opening position, the anti-springback operating mechanism further comprises a rotatably arranged blocking piece, and the main shaft is provided with a stop piece rotating along with the main shaft. The blocking piece is provided with at least one blocking part and at least one avoiding part, the blocking piece is provided with an impacting structure and a pushing structure, when the main shaft rotates from the closing position to the opening position, the pushing structure of the blocking piece is driven to push the blocking piece to rotate to enable the blocking part to rotate to an anti-springback position, and when the blocking part is located at the anti-springback position, the pushing structure of the blocking piece is driven to push the blocking part to rotate to enable the blocking part to rotate to the anti-springback position. The blocking part is located on the rotation path of the impact structure when the main shaft rotates from the opening position to the closing position, the blocking part is located between the rotation center of the blocking part and the impact structure, and when the main shaft rebounds during opening, the impact structure abuts against the blocking part to form a dead point so as to prevent the main shaft from rebounding. And inertia is not needed to prevent the main shaft from rebounding.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus field, concretely relates to a kind of anti-rebound operating mechanism. BACKGROUND

[0002] When circuit breaker meets short-circuit current breaking or normal opening, main shaft reaches opening position and will bounce due to collision, drive contact to bounce, cause arc to not be extinguished in time or arc reignites, seriously reduce breaking performance.

[0003] The anti-rebound structure of existing circuit breaker operating mechanism, for example, Chinese patent application CN107481897A, CN112201547A, CN202058671U, CN219534441U.Usually all be equipped with blocking piece and reset spring, mostly utilize the inertia of blocking piece when opening, overcome the elastic force of reset spring, and interlock with operating mechanism to realize anti-contact bounce, and such structure is prone to the following problems:1, anti-rebound function is easy to fail;2, influence operating mechanism closing operation, and its reliability is poor;3, installation is complex, and the operating position can only be in the interior of operating mechanism when installing, and the space is narrow, not easy to install and maintain. SUMMARY

[0004] The utility model aims at overcoming at least one defect of prior art, and provides a kind of anti-rebound operating mechanism.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of anti-rebound operating mechanism, including the main shaft that is rotationally arranged on side plate, the main shaft is used to be connected with movable contact, can be rotated between closing position and opening position, the anti-rebound operating mechanism further includes rotationally arranged blocking piece, the main shaft is equipped with the stop piece that rotates with the main shaft, the blocking piece is equipped with at least one blocking part and at least one avoiding part, the stop piece is equipped with impact structure and push structure,

[0007] When the main shaft rotates from closing position to opening position, the push structure of stop piece pushes blocking piece to rotate and makes blocking part rotate to anti-rebound position, when blocking part is in anti-rebound position, the blocking part is in the rotation path of impact structure when the main shaft rotates from opening position to closing position, when the main shaft opens and bounces, the impact structure and blocking part are in abutment to form dead point to prevent the main shaft from bouncing, and blocking part is between the rotation center of blocking piece and impact structure;

[0008] When the main shaft opens to position, blocking piece rotates to avoiding position due to the driving of push structure, when blocking part is in avoiding position, the avoiding part is in the rotation path of impact structure when the main shaft rotates from opening position to closing position.

[0009] Preferably, the impact structure of the stopper pushes the avoidance part to drive the stopper to slide with the avoidance part, and the main shaft is rotated to the closed position, and the stopper contacts the avoidance part when the main shaft is in the closed position.

[0010] Preferably, the stopper comprises two symmetrically arranged blocking parts and two symmetrically arranged avoidance parts, and the avoidance parts and the blocking parts are alternately arranged along the side of the stopper.

[0011] Preferably, the stopper comprises a rotating part connected with the main shaft, and a swinging part arranged on one side of the rotating part in the radial direction, and the swinging part is provided with the impact structure and the pushing structure arranged at intervals.

[0012] Preferably, the avoidance part is provided with a first sliding surface for sliding with the stopper, the stopper is provided with a sliding rail surface matched with the first sliding surface, the first sliding surface is a circular arc groove recessed towards the center of rotation of the stopper, the sliding rail surface is a circular arc surface protruding away from the center of rotation of the stopper, and when the main shaft is rotated from the open position to the closed position, the impact structure of the stopper drives the avoidance part, so that the sliding rail surface and the first sliding surface are in sliding fit, and the sliding rail surface contacts the first sliding surface when the main shaft is in the closed position.

[0013] Preferably, when the main shaft is rotated from the closed position to the open position, the pushing structure of the stopper pushes a corresponding blocking part, so that the stopper is rotated in the first direction and the other blocking part is rotated to the anti-rebound position.

[0014] When the main shaft is rotated from the open position to the closed position, the impact structure of the stopper pushes a corresponding avoidance part, so that the stopper is still rotated in the first direction to a position where the avoidance part and the stopper are in sliding fit, the stopper and the avoidance part are in sliding fit, and the main shaft is rotated to the closed position.

[0015] Preferably, the stopper has a quadrilateral structure, comprising two oppositely arranged first sides and two oppositely arranged second sides, the blocking parts are arranged on the two first sides, and the avoidance parts are arranged on the two second sides; the blocking part is provided with a blocking groove for limiting the impact structure, and the avoidance part is provided with a first sliding surface for sliding with the stopper.

[0016] Preferably, the length of the second side is greater than the length of the first side, and the distance from the second side to the center of rotation of the stopper is less than the distance from the first side to the center of rotation of the stopper.

[0017] Preferably, when the blocking part is rotated to the anti-rebound position, the stopper is located between the impact structure and the pushing structure, and the two blocking parts of the stopper are located opposite to the impact structure and the pushing structure.

[0018] Preferably, the blocking part is provided with a blocking groove for limiting the impact structure, the blocking groove comprises a first blocking surface and a second blocking surface connected with each other, the first blocking surface and the second blocking surface are oppositely arranged to form the blocking groove, the impact structure can push the first blocking surface to drive the blocking part to rotate, and the impact structure slides along the first blocking surface to approach the second blocking surface, and the second blocking surface abuts against the impact structure to form a dead point.

[0019] Preferably, the length of the first blocking surface is greater than the length of the second blocking surface, the first blocking surface is provided with a blocking section, the impact structure can contact the blocking section when contacting the second blocking surface, and the blocking section is located between the impact structure and the rotation center of the blocking part.

[0020] Preferably, the length of the first blocking surface is greater than the length of the second blocking surface, and the slope of the first blocking surface is smaller than the slope of the second blocking surface.

[0021] Preferably, the pushing structure is connected to the side of the swing part away from the rotating part, the connection between the swing part and the pushing structure is provided with a first avoiding groove, the connection between the pushing structure and the swing part is provided with a second avoiding groove, the first avoiding groove and the second avoiding groove are communicated, the impact structure is arranged on the side of the first avoiding groove away from the second avoiding groove, the pushing structure is arranged on the side of the second avoiding groove away from the first avoiding groove, and the distance from the pushing structure to the rotation center of the stop part is greater than the distance from the impact structure to the rotation center of the stop part.

[0022] Preferably, the side of the swing part away from the rotating part is provided with an arc-shaped sliding rail surface, and the sliding rail surface is located on the side of the impact structure away from the pushing structure.

[0023] Preferably, when the main shaft rotates from the closing position to the opening position, the pushing structure pushes the blocking part to rotate from the first position to the second position, so that the blocking part is located at the anti-rebound position.

[0024] When the main shaft rebounds, the impact structure can push the blocking part to rotate from the second position to the third position, so that the impact structure abuts against the blocking part to form a dead point to prevent the main shaft from rebounding.

[0025] When the main shaft is opened to the position, the pushing structure pushes the blocking part to rotate from the third position to the avoiding position, so that the blocking part is away from the anti-rebound position.

[0026] When the main shaft is closed to the position, the impact structure pushes the blocking part to rotate from the avoiding position to the first position.

[0027] Preferably, the operating mechanism further comprises a connecting rod mechanism, a driving shaft, a cam mechanism and an energy storage mechanism, the main shaft and the driving shaft are rotatably installed on the two side plates, the connecting rod mechanism, the cam mechanism and the energy storage mechanism are installed between the two side plates, the connecting rod mechanism is connected with the main shaft, the driving shaft drives the energy storage mechanism to store energy through the cam mechanism, and the energy releasing energy storage mechanism can drive the connecting rod mechanism to drive the main shaft to rotate to the closing direction.

[0028] The circuit breaker of the embodiment does not need to utilize inertia to prevent the main shaft from rebounding, but utilizes the blocking piece and the stopper to form a dead point and limit the impact structure to prevent the main shaft from rebounding, has the characteristics of simple structure and high reliability, and the blocking piece is reset through the stopper, does not need to additionally set a spring for driving the blocking piece to reset, and can reduce the number of parts.

[0029] In addition, the blocking piece is provided with two blocking parts which are centrally symmetrical, and can be reset to the first position after each action of half a circle, has the characteristics of fast action and small size. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of the anti-rebound operating mechanism of the utility model;

[0031] Figure 2 is a structural schematic view of the blocking piece of the utility model;

[0032] Figure 3 is a structural schematic view of the stopper of the utility model;

[0033] Figure 4 is a schematic view of the utility model just starting to open the circuit;

[0034] Figure 5 is a schematic view of the utility model Figure 4 ;

[0035] Figure 6 is a schematic view of the utility model pushing structure pushing the blocking piece from the first position to the second position in the process of opening the circuit;

[0036] Figure 7 is a schematic view of the utility model Figure 6 ;

[0037] Figure 8 is a schematic view of the utility model just rebounding at the moment after the impact of opening the circuit;

[0038] Figure 9 is a schematic view of the utility model Figure 8 ;

[0039] Figure 10 is a schematic view of the utility model stopper approaching the blocking piece in the process of rebounding after the impact of opening the circuit;

[0040] Figure 11 is the utility model Figure 10 ;

[0041] Figure 12 is the utility model ;

[0042] Figure 13 is the utility model Figure 12 ;

[0043] Figure 14 is the utility model ;

[0044] Figure 15 is the utility model Figure 14 ;

[0045] Figure 16 is the utility model ;

[0046] Figure 17 is the utility model Figure 16 ;

[0047] Figure 18 is the utility model ;

[0048] Figure 19 is the utility model Figure 18 ;

[0049] Figure 20 is the utility model ;

[0050] Figure 21 is the utility model Figure 20 ;

[0051] Figure 22 is the utility model ;

[0052] Figure 23 is the utility model Figure 22 ;

[0053] Figure 24 is the utility model ;

[0054] Figure 25 is the utility model Figure 24 ;

[0055] Figure 26 is the closing to position of the utility model schematic diagram;

[0056] Figure 27 is the utility model Figure 26 Partial enlarged view;

[0057] In the figure:

[0058] 1 side plate 42 push structure

[0059] 2 main shaft 43 rotation part

[0060] 3 blocking piece 44 swing part

[0061] 4 stop piece 45 through hole

[0062] 11 connecting rod mechanism 46 first avoiding groove

[0063] 12 drive shaft 47 second avoiding groove

[0064] 21 cantilever 48 slide rail surface

[0065] 22 brake stop shaft 49 push boss

[0066] 30 blocking part 301 first sliding part

[0067] 31 first blocking surface 302 second sliding part

[0068] 32 second blocking surface 411 first impact part

[0069] 35 blocking groove 412 second impact part

[0070] 36 blocking section 413 third impact part

[0071] 39 avoiding part 421 first push part

[0072] 390 first sliding surface 422 second push part

[0073] 41 impact structure 423 third push part DETAILED DESCRIPTION

[0074] The following embodiments are further illustrated in the drawings, and the specific implementation of the anti-rebound operating mechanism of the utility model is further illustrated. The anti-rebound operating mechanism of the utility model is not limited to the description of the following embodiments.

[0075] As Figure 1As shown, the anti-rebound operating mechanism of the embodiment is generally used for a frame type circuit breaker, which generally comprises a base, a plurality of fixedly connected contact supports arranged side by side in the base, a plurality of movable contacts arranged on each contact support, and an operating mechanism arranged on the top side of the base. The operating mechanism comprises side plates 1, a main shaft 2, a connecting rod mechanism 11, a driving shaft 12, a cam mechanism and an energy storage mechanism. The main shaft 2 and the driving shaft 12 are rotatably installed on the two side plates 1, and the connecting rod mechanism 11, the cam mechanism and the energy storage mechanism are installed between the two side plates 1. The main shaft 2 is used to be connected with the movable contacts to drive the movable contacts to swing. The connecting rod mechanism 11 is connected with the main shaft 2, and the main shaft 2 is provided with cantilever arms 21 connected with the contact supports to drive the movable contacts to contact and separate from the static contacts. The driving shaft 12 drives the energy storage mechanism to store energy through the cam mechanism, so that the operating mechanism is in a stable energy storage state. When the circuit breaker is in an open state and the operating mechanism is in an energy storage state, the energy storage mechanism can be driven to release energy by a closing button, so that the energy releasing energy storage mechanism drives the connecting rod mechanism 11 to drive the main shaft 2 to rotate in a closing direction, and then drives the movable contacts to contact with the static contacts to realize closing.

[0076] The connecting rod mechanism 11 generally comprises a transmission member and a jump buckle rotatably connected, and a lock buckle for locking the jump buckle. When the lock buckle locks the jump buckle, the connecting rod mechanism 11 can drive the driving main shaft 2 to rotate to drive the movable contacts to contact and separate from the static contacts, and store energy in the contact spring when the movable contacts contact with the static contacts. When the lock buckle unlocks the jump buckle, the contact spring is released, and the energy releasing contact spring drives the main shaft 2 to rotate through the connecting rod mechanism 11 to separate the movable contacts from the static contacts. The operating mechanism is prior art in the field, and will not be described in detail.

[0077] The main shaft 2 can rotate between a closing position and an open position to drive the movable contacts to contact and separate from the static contacts. A plurality of cantilever arms 21 are fixedly installed on the main shaft 2, part of the cantilever arms 21 are connected with the contact supports through connecting rods, and at least one cantilever arm 21 is used to cooperate with an open stop shaft 22 to limit the open position of the main shaft 2. When the circuit breaker is opened due to short-circuit current, the operating mechanism drives the main shaft 2 to rotate through the connecting rod mechanism 11 to separate the movable contacts from the static contacts. When the main shaft 2 reaches the open position, it will bounce due to collision with the open stop shaft 22, drive the contacts to bounce, and cause the arc to not be extinguished in time or the arc to reignite, which seriously reduces the breaking performance. The two cantilever arms 21 of the embodiment are oppositely arranged on the two sides of the operating mechanism, and are respectively used to cooperate with the open stop shaft 22 to limit the open position of the main shaft 2.

[0078] As shown in the drawings, Figures 1-3The improved point of the embodiment is that the anti-rebound operating mechanism further comprises a rotationally arranged blocking piece 3, the main shaft 2 is provided with a stop piece 4 rotating with the main shaft 2, the blocking piece 3 is provided with at least one blocking portion 30 and at least one avoiding portion 39, the stop piece 4 is provided with an impact structure 41 and a pushing structure 42, when the operating mechanism is tripped or tripped, that is, when the main shaft 2 rotates from the closed position to the open position, the pushing structure 42 of the stop piece 4 pushes the blocking piece 3 to rotate to make the blocking portion 30 rotate to the anti-rebound position, when the blocking portion 30 is in the anti-rebound position, the blocking portion 30 is located on the rotation path of the impact structure 41 when the main shaft 2 rotates from the open position to the closed position, and the blocking portion 30 is located between the rotation center of the blocking piece 3 and the impact structure 41, the impact structure 41 is limited by the blocking portion 30 to prevent the main shaft 2 from rebounding, when the main shaft 2 is tripped and rebounds, the impact structure 41 abuts against the blocking portion 30 to form a dead point, so that the stop piece 4 and the blocking piece 3 cannot rotate to prevent the main shaft 2 from rebounding; when the main shaft 2 is stably in the open position, that is, when the main shaft 2 is tripped in place, the blocking piece 3 drives the blocking portion 30 to rotate to the avoiding position due to the driving of the pushing structure 42, and the blocking portion 30 leaves the anti-rebound position, when the blocking portion 30 is in the avoiding position, the avoiding portion 39 is located on the rotation path of the impact structure 41 when the main shaft 2 rotates from the open position to the closed position, so that the operating mechanism can be normally closed.

[0079] The anti-rebound operating mechanism of the embodiment, the blocking piece 3 is provided with the blocking portion 30 and the avoiding portion 39, the pushing structure 42 of the stop piece 4 pushes the blocking piece 3 to rotate to make the blocking portion 30 rotate to the anti-rebound position when the main shaft 2 rotates from the closed position to the open position, the impact structure 41 of the stop piece 4 abuts against the blocking portion 30 to form a dead point, that is, the blocking portion 30 is located between the rotation center of the blocking piece 3 and the impact structure 41, so that the stop piece 4 and the blocking piece 3 cannot rotate to prevent the main shaft 2 from rebounding, and there is no need to additionally provide the blocking piece 3 with elastic force, compared with the prior art scheme of providing a reset spring, the number of parts can be reduced, the installation is simple and efficient, and the problem of poor reliability caused by the blocking piece 3 overcoming the elastic force of the reset spring by inertia to prevent the main shaft 2 from rebounding is avoided.

[0080] Preferably, during the closing operation of the operating mechanism, i.e., when the main shaft 2 rotates from the open position to the closed position, the impact structure 41 pushes the avoidance part 39 to rotate the blocking member 3 until the stop member 4 slides into contact with the avoidance part 39, causing the main shaft 2 to rotate to the closed position. When the main shaft 2 is in the closed position, the stop member 4 contacts the avoidance part 39. Since a return spring is not required, there is no spring force from the return spring to the blocking member 3 to prevent closing. Therefore, when the operating mechanism performs the closing operation, the stop member 4 does not need to avoid the blocking member 3; the blocking part 30 only needs to avoid the stop member 4. The avoidance part 39 does not need to avoid the stop member 4. Thus, when the main shaft 2 rotates from the open position to the closed position, the impact structure 41 of the stop member 4 can push the avoidance part 39 to rotate the blocking member 3. The impact structure 41 of the stop member 4 pushes the blocking member 3 to rotate through the avoidance part 39 until the stop member 4 slides into contact with the avoidance part 39, causing the main shaft 2 to rotate to the closed position.

[0081] The anti-rebound action process in this embodiment is as follows:

[0082] like Figures 4-5 As shown, when the main shaft 2 starts to rotate towards the open position, it rotates clockwise. The pushing structure 42 pushes the blocking member 3 from the first position. Figures 6-7 Rotate to the second position Figures 8-9 The blocking part 30 is rotated to the path of the rebound direction of the impact structure 41; when the blocking member 3 is rotated to the second position, the blocking part 30 is in the anti-rebound position.

[0083] like Figures 10-11 As shown, when the main shaft 2 rebounds from the open position, it rotates counterclockwise. The blocking part 30 limits the impact structure 41 to prevent the main shaft 2 from rebounding. The impact structure 41 can push the blocking member 3 to rotate from the second position to the third position when the main shaft 2 rebounds. Figures 12-13 At the same time, the impact structure 41 and the blocking part 30 abut against each other to form a dead point. The blocking part 30 is located between the rotation center of the blocking member 3 and the impact structure 41. The blocking part 30 limits the impact structure 41 to prevent the spindle 2 from rebounding. When the blocking member 3 rotates to the third position, that is, when the blocking part 30 and the impact structure 41 abut against each other to prevent the spindle 2 from rebounding.

[0084] like Figures 14-17 As shown, when the main shaft 2 is in the open position, i.e., when it is stably in the open position, the pushing structure 42 drives the blocking member 3 to rotate to the avoidance position, causing the blocking part 30 to leave the anti-rebound position. The blocking part 30 leaves the rotation path of the impact structure 41 when the main shaft 2 rotates from the open position to the closed position, preventing the blocking part 30 from abutting against the impact structure 41 to form a dead point. (Reference) Figures 18-19 When the main shaft 2 is in the open position, the blocking member 3 rotates from the third position to the fourth position, the fifth position, or any position between the fourth and fifth positions as a clearance position.Figures 18-19 The blocking part 30 is away from the rebound direction of the impact structure 41, and the avoiding part 39 is in the path of the rebound direction of the impact structure 41, so the blocking part 3 will not block the rotation of the main shaft 2 to the closed position. The blocking part 3 can be pushed by the pushing structure 42 and then rotated to the fourth position or the fifth position by gravity and friction Figure 15 , or the pushing structure 42 avoids the blocking part 3 after the main shaft 2 is opened to the position, and the blocking part 3 is rotated counterclockwise to the fourth position and clockwise to the fifth position by gravity and friction Figure 19 .

[0085] As Figures 22-25 shown, the impact structure 41 pushes the blocking part 3 to rotate from the fourth position or the fifth position to the first position when it is closed to the position. Because the blocking part 30 is away from the anti-rebound position, the impact structure 41 rotates to the closing direction and does not form a dead point with the blocking part 30, but pushes the avoiding part 39 to rotate the blocking part 3. Because the blocking part 3 is not provided with a driving blocking part 3 reset spring, it does not need to overcome the resistance of the reset spring, and can be normally closed.

[0086] Of course, as other embodiments, the avoiding part 39 can completely avoid the impact structure 41 of the stop part 4, that is, when the main shaft 2 rotates from the open position to the closed position, the impact structure 41 does not push the avoiding part 39, and / or the stop part 4 can also be in sliding fit with the avoiding part 39. For example, the avoiding part 39 is provided as a larger avoiding groove structure.

[0087] As Figures 1-2 shown, the blocking part 3 is rotatably arranged on the side plate 1 and located outside the two side plates 1, and the stop part 4 is fixedly installed on the main shaft 2 and also located outside the two side plates 1.

[0088] As Figure 2 shown, a preferred embodiment of the blocking part 3 includes two blocking parts 30 arranged symmetrically at the center and two avoiding parts 39 arranged symmetrically at the center, and the avoiding part 39 and the blocking part 30 are alternately arranged along the side edge of the blocking part 3.

[0089] Preferably, the blocking part 3 of the embodiment is in a quadrilateral structure, including two oppositely arranged first side edges and two oppositely arranged second side edges, the blocking part 30 is arranged on the two first side edges, and the avoiding part 39 is arranged on the two second side edges. The blocking part 30 is provided with a blocking groove 35 for limiting the impact structure 41, and the avoiding part 39 is provided with a first sliding surface 390 in sliding fit with the stop part 4.

[0090] Further, the length of the second side is greater than the length of the first side, and the distance from the second side to the rotation center of the blocking piece 3 is less than the distance from the first side to the rotation center of the blocking piece 3.

[0091] When the operating mechanism is tripped or tripped, that is, the main shaft 2 rotates from the closed position to the open position, the pushing structure 42 of the stop piece 4 pushes the corresponding blocking part 30, so that the blocking piece 3 rotates in the clockwise direction in the first direction and drives the blocking part 30 on the other side to rotate to the anti-rebound position. When the main shaft 2 rebounds when tripped, the impact structure 41 abuts against the blocking part 30 on the other side to form a dead point to prevent the main shaft 2 from rebounding;

[0092] When the main shaft 2 rotates from the open position to the closed position, the impact structure 41 of the stop piece 4 pushes the corresponding avoiding part 39, so that the blocking piece 3 still rotates in the first direction to the position where the avoiding part 39 and the stop piece 4 are in sliding cooperation, so that the stop piece 4 and the avoiding part 39 are in sliding cooperation and the main shaft 2 rotates to the closed position. The blocking piece 3 is provided with two blocking parts 30 and two avoiding parts 39 which are centrally symmetric, and can be reset to the first position after half a circle each time, and has the characteristics of small size.

[0093] It should be noted that as other embodiments, the blocking piece 3 can be provided with more blocking parts 30 and avoiding parts 39, for example, four blocking parts 30 and four avoiding parts 39, and the avoiding parts 39 and the blocking parts 30 are alternately arranged along the side of the blocking piece 3. Thus, it can be reset to the first position after rotating 90 degrees each time. Further, six blocking parts 30 and six avoiding parts 39 can also be provided, of course, which involves greater difficulty.

[0094] As shown in Figure 3 A preferred embodiment of a stop piece 4, the stop piece 4 includes a rotating part 43 connected with the main shaft 2, and a swing part 44 provided on one side of the rotating part 43 in the radial direction, and the swing part 44 is provided with impact structures 41 and pushing structures 42 arranged at intervals. When the blocking part 30 rotates to the anti-rebound position, the blocking piece 3 is located between the impact structure 41 and the pushing structure 42, and the two blocking parts 30 of the blocking piece 3, one against the impact structure 41, and the other against the pushing structure 42.

[0095] Preferably, the side of the swing part 44 away from the rotating part 43 is provided with an arc-shaped sliding rail surface 48, the sliding rail surface 48 is located on the side of the impact structure 41 away from the pushing structure 42, and the sliding rail surface 48 abuts against the first sliding surface 390 of the blocking piece 3 when the main shaft 2 is in the closed position. The blocking piece 3 rotates out of the impact structure 41 and the pushing structure 42.

[0096] As shown in Figures 2-3As shown, in particular, the blocking part 30 is provided with a blocking groove 35 for limiting the impact structure 41, and the impact structure 41 can be limited to the bottom of the blocking groove 35 to limit the cooperation, so that the blocking part 3 and the stop part 4 are stopped at the third position. The blocking groove 35 of the embodiment includes a first blocking surface 31 and a second blocking surface 32 connected with each other, and the first blocking surface 31 and the second blocking surface 32 are oppositely inclined to form the blocking groove 35. The impact structure 41 can push the first blocking surface 31 to drive the blocking part 3 to rotate, and at the same time, the impact structure 41 slides along the first blocking surface 31 to approach the second blocking surface 32. When the second blocking surface 32 contacts the impact structure 41, it is abutted to form a dead point, so that the blocking part 3 and the stop part 4 are stopped from rotating and kept at the third position.

[0097] Further, the length of the first blocking surface 31 is greater than the length of the second blocking surface 32, and the first blocking surface 31 is provided with a blocking section 36. When the impact structure 41 contacts the second blocking surface 32, the impact structure 41 can simultaneously contact the blocking section 36, and the blocking section 36 is located between the impact structure 41 and the rotation center of the blocking part 3. The first blocking surface 31 has a sliding cooperation function with the impact structure 41, and the impact structure 41 does not need to be directly aligned with the blocking section 36, but can be aligned with the first blocking surface 31 with a larger size when rebounding, and then the blocking part 3 and the stop part 4 are rotated to the third position through the sliding cooperation with the first blocking surface 31. After contacting the blocking section 36 and the second blocking surface 32, the dead point is formed, which can reduce the difficulty of cooperation and has the characteristics of high reliability and simple structure. Preferably, the slope of the first blocking surface 31 is smaller than the slope of the second blocking surface 32.

[0098] Preferably, the avoiding part 39 is provided with a first sliding surface 390 for sliding cooperation with the stop part 4, and the stop part 4 is provided with a sliding rail surface 48 for cooperation with the first sliding surface 390. The first sliding surface 390 is a circular arc groove recessed toward the rotation center of the blocking part 3, and the sliding rail surface 48 is a circular arc surface protruding away from the rotation center of the stop part 4. When the main shaft 2 rotates from the open position to the closed position, the impact structure 41 of the stop part 4 pushes the avoiding part 39 to drive the blocking part 3 to rotate. With the rotation of the stop part 4 and the blocking part 3, the sliding rail surface 48 and the first sliding surface 390 are in sliding cooperation, and at this time, the sliding rail surface 48 and the first sliding surface 390 have the same center. When the main shaft 2 is located at the closed position, the sliding rail surface 48 contacts the first sliding surface 390.

[0099] As Figure 2As shown, a protruding first sliding portion 301 is provided between the first sliding surface 390 and the second blocking surface 32, and a recessed second sliding portion 302 is provided between the first sliding surface 390 and the first sliding portion 301. During the process of pushing the blocking member 3 from the fourth or fifth position to the first position, the impact structure 41 first contacts the first sliding portion 301, and then slides towards the bottom of the first sliding surface 390 via the second sliding portion 302, pushing the blocking member 3 to rotate, causing the slide rail surface 48 to slide in cooperation with the first sliding surface 390. That is, in addition to the slide rail surface 48 sliding in cooperation with the first sliding surface 390 in the first position, the avoidance portion 39 can also be provided with other groove structures, protrusion structures, or driving surfaces to cooperate with the stop member 4 as needed.

[0100] like Figure 3 As shown, the specific structure of the stop member 4 in this embodiment is as follows: the pushing structure 42 is connected to the side of the swing part 44 away from the rotating part 43; a first clearance groove 46 is provided at the connection between the swing part 44 and the pushing structure 42; a second clearance groove 47 is provided at the connection between the pushing structure 42 and the swing part 44; the first clearance groove 46 and the second clearance groove 47 are connected; the impact structure 41 is disposed on the side of the first clearance groove 46 away from the second clearance groove 47; the pushing structure 42 is disposed on the side of the second clearance groove 47 away from the first clearance groove 46; and the distance from the pushing structure 42 to the rotation center of the stop member 4 is greater than the distance from the impact structure 41 to the rotation center of the stop member 4.

[0101] Furthermore, the impact structure 41 has an arc-shaped slide rail surface 48 on the side away from the pushing structure 42. An arc-shaped transition surface is provided between the slide rail surface 48 and the first clearance groove 46 as the impact structure 41. A second impact part 412 is provided in the middle of the transition surface. A first impact part 411 is provided at one end of the transition surface connected to the slide rail surface 48. A third impact part 413 is provided at one end of the transition surface connected to the first clearance groove 46. During the process of pushing the blocking member 3 to rotate from the fourth position or the fifth position to the first position, the third impact part 413 first contacts the first sliding part 301, then the second impact part 412 contacts the second sliding part 302, and then the slide rail surface 48 slides in cooperation with the bottom of the first sliding surface 390.

[0102] Furthermore, the pushing structure 42 has a protruding pushing boss 49 at the end away from the rotating part 43. The pushing boss 49 has a first pushing part 421, a second pushing part 422 on the side of the pushing boss 49 near the rotating part 43, and a third pushing part 423 on the side of the pushing structure 42 near the rotating part 43. The first pushing part 421 can limit the first sliding part 301 of the first sliding surface 390 of the blocking member 3 and limit the blocking member 3 to the fifth position. The third pushing part 423 can limit the first sliding surface 390 of the blocking member 3 and limit the blocking member 3 to the fourth position. The second pushing part 422 is used to push the blocking member 3 from the first position... Figure 7 Rotate to the second position Figure 9 This causes the blocking part 30 to rotate onto the path of the impact structure 41 in the direction of rebound.

[0103] When the main shaft 2 rotates from the closed position to the open position, as the stop 4 and the blocking member 3 rotate, the blocking member 3 rotates into the first clearance groove 46 and the second clearance groove 47, and the first clearance groove 46 and the second clearance groove 47 are used to avoid the blocking member 3; when the main shaft 2 rotates from the open position to the closed position, as the stop 4 and the blocking member 3 rotate, the blocking member 3 rotates out of the first clearance groove 46 and the second clearance groove 47, and the blocking member 3 is located outside the first clearance groove 46 and the second clearance groove 47.

[0104] The tripping process of this embodiment is further described in detail below:

[0105] like Figures 4-5 As shown, when the operating mechanism opens, the main shaft 2 rotates from the closed position to the open position. Under the action of the opening tension spring and / or the contact spring, the main shaft 2 rotates clockwise, driving the cantilever 21 and the stop 4 to rotate around the axis of the main shaft 2. The first sliding surface 390 of the blocking member 3 contacts and slides with the slide rail surface 48 of the stop 4. The stop 4 rotates while the blocking member 3 remains stationary. At this time, the blocking member 3 is in the first position, and the blocking member 3 is located outside the first clearance groove 46 and the second clearance groove 47.

[0106] like Figures 6-7 As shown, when the cantilever 21 on the main shaft 2 approaches the tripping stop shaft 22, the first sliding surface 390 disengages from the slide rail surface 48 of the stop member 4, and the second pushing part 422 of the stop member 4 pushes the first blocking surface 31 of the blocking member 3, causing the blocking member 3 to rotate clockwise from the first position to the second position.

[0107] like Figures 8-9As shown, when the cantilever 21 contacts the tripping stop shaft 22, it reaches the maximum tripping position. The stop member 4 pushes the blocking member 3 to rotate to the second position, and the blocking part 30 rotates to the anti-rebound position. The blocking part 30 rotates to the path of the rebound direction of the impact structure 41. At this time, the blocking member 3 rotates between the impact structure 41 and the pushing structure 42, with one of the two blocking parts 30 facing the impact structure 41 and the other facing the pushing structure 42.

[0108] like Figures 10-11 As shown, at this time, due to the collision between the cantilever 21 and the tripping stop shaft 22, the main shaft 2 rebounds and rotates counterclockwise, which drives the stop 4 to rotate counterclockwise. The third impact part 413 of the impact structure 41 of the stop 4 contacts and collides with the first blocking surface 31 of the blocking member 3.

[0109] like Figures 12-13 As shown, the main shaft 2 drives the stop 4 to rebound and continue rotating counterclockwise. The impact structure 41 slides along the first blocking surface 31 until it contacts the second blocking surface 32, which also pushes the stop 3 to continue rotating clockwise to the third position. The blocking part 30 is located between the rotation center of the stop 3 and the impact structure 41 and forms a dead point, restricting the clockwise movement of the stop 3 and the counterclockwise movement of the stop 4, which in turn restricts the counterclockwise movement of the main shaft 2. The main shaft 2 reaches the maximum rebound position, preventing the main shaft 2 from driving the moving contact to continue rotating in the closing direction, thus avoiding arc reignition and reclosing. The third position is also the position where the dead point is formed. At this time, the blocking part 30 is located between the rotation center of the stop 3 and the impact structure 41. The impact structure 41 and the blocking part 30 are mutually resisting and cannot continue to rotate.

[0110] like Figures 14-17 As shown, the main shaft 2 then continues to rotate clockwise toward the open position under the action of the opening tension spring and / or the contact spring. At this time, the second pushing part 422 of the pushing structure 42 of the stop member 4 contacts and collides with the second sliding part 302 of the blocking member 3, pushing the blocking member 3 to continue to rotate clockwise. Finally, the main shaft 2 stops at the open position under the action of the opening tension spring and the opening stop shaft 22, and the opening action is completed.

[0111] like Figures 18-19 As shown, after being impacted by the stopper 4, the blocking member 3 rotates clockwise to approximately... Figure 17 The position is then randomly limited to the fourth or fifth position by gravity and friction. The blocking part 30 of the blocking member 3 leaves the anti-rebound position and rotates to the avoidance position. The avoidance part 39 is located on the rotation path of the impact structure 41 when rotating from the open position to the closed position.

[0112] refer to Figures 8-9, when the operating mechanism performs opening operation, whether it is tripping opening caused by short-circuit fault or normal opening operation by mechanical operation, rebound of the main shaft 2 is inevitable because the force value of the opening spring is not enough to overcome the reaction force of the collision, and the reaction force energy is very large and is generally difficult to overcome. Thus, the blocking part 30 of the blocking piece 3 is located in the path of the rebound direction of the impact structure 41, which can block the stop piece 4 to prevent rebound; one blocking part 30 is opposite to the impact structure 41. In special cases, if the main shaft 2 does not rebound or the rebound is very slight and basically does not occur, the impact structure 41 does not collide with the blocking part 30 for limiting, and the blocking piece 3 is driven to rotate to the fourth position or the fifth position or the position between the fourth position and the fifth position as shown in Figures 18-19 .

[0113] The next closing process:

[0114] As shown in Figures 20-21 , when the operating mechanism performs closing operation again, the main shaft 2 rotates from the opening position to the closing position, at this time the blocking piece 3 is in the closing preparation position fourth position or fifth position as shown in Figure 19 , taking the fifth position as an example, the main shaft 2 drives the cantilever 21 and the stop piece 4 to rotate counterclockwise, the third impact part 413 of the impact structure 41 of the stop piece 4 presses and collides with the first sliding part 301 of the avoiding part 39 of the blocking piece 3, and the blocking piece 3 rotates clockwise;

[0115] As shown in Figures 22-23 , with the counterclockwise rotation of the stop piece 4, the blocking piece 3 rotates clockwise, the second impact part 412 of the impact structure 41 of the stop piece 4 contacts and cooperates with the second sliding part 302 of the avoiding part 39, and the blocking piece 3 continues to rotate clockwise;

[0116] As shown in Figures 24-25 , with the counterclockwise rotation of the stop piece 4, the blocking piece 3 rotates clockwise, the first impact part 411 of the stop piece 4 contacts and cooperates with the first sliding surface 390, and the blocking piece 3 continues to rotate clockwise;

[0117] As shown in Figures 26-27 , finally the first sliding surface 390 of the blocking piece 3 cooperates with the sliding rail surface 48 of the stop piece 4, with the rotation of the stop piece 4, the freedom of the blocking piece 3 is gradually limited, until the operating mechanism completes the closing action, and the stop piece 4 stops at the closing position as shown in Figures 26-27 . When the main shaft 2 is in the closing position, the sliding rail surface 48 of the stop piece 4 abuts against the first sliding surface 390 of the blocking piece 3.

[0118] If the closing operation is performed, the blocking piece 3 is in the upper Figure 19In the fourth position, the main shaft 2 drives the cantilever 21 and the stop 4 to rotate counterclockwise, directly rotating to... Figures 24-25 The state shown is then reached, and the stop 4 drives the blocking member 3 to rotate to... Figures 26-27 In the closed position, the first sliding surface 390 of the blocking member 3 cooperates with the slide rail surface 48 of the stop member 4, and the stop member 4 stops in the closed position.

[0119] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0120] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An anti-rebound operating mechanism, comprising a main shaft (2) rotatably mounted on a side plate (1), the main shaft (2) being connected to a moving contact and capable of rotating between a closed position and an open position, characterized in that: The anti-rebound operating mechanism further includes a rotatably mounted blocking member (3), and a stop member (4) that rotates with the main shaft (2). The blocking member (3) has at least one blocking part (30) and at least one clearance part (39), and the stop member (4) has an impact structure (41) and a pushing structure (42). When the main shaft (2) rotates from the closed position to the open position, it drives the push structure (42) of the stop (4) to push the blocking member (3) to rotate, causing the blocking part (30) to rotate to the anti-rebound position. When the blocking part (30) is in the anti-rebound position, the blocking part (30) is located on the rotation path of the impact structure (41) when the main shaft (2) rotates from the open position to the closed position. When the main shaft (2) rebounds during the opening, the impact structure (41) and the blocking part (30) abut against each other to form a dead point to prevent the main shaft (2) from rebounding. The blocking part (30) is located between the rotation center of the blocking member (3) and the impact structure (41). When the main shaft (2) is in the open position, the blocking part (3) is driven by the pushing structure (42) to rotate the blocking part (30) to the avoidance position. When the blocking part (30) is in the avoidance position, the avoidance part (39) is located on the rotation path of the impact structure (41) when the main shaft (2) rotates from the open position to the closed position.

2. The anti-rebound operating mechanism according to claim 1, characterized in that: The impact structure (41) pushes the avoidance part (39) to drive the blocking part (3) to rotate until the stop part (4) slides with the avoidance part (39), so that the main shaft (2) rotates to the closed position. When the main shaft (2) is in the closed position, the stop part (4) contacts the avoidance part (39).

3. The anti-rebound operating mechanism according to claim 1, characterized in that: The blocking member (3) includes two blocking parts (30) arranged symmetrically at the center, and two clearance parts (39) arranged symmetrically at the center. The clearance parts (39) and the blocking parts (30) are alternately arranged along the side of the blocking member (3).

4. The anti-rebound operating mechanism according to claim 3, characterized in that: The stop member (4) includes a rotating part (43) connected to the main shaft (2) and a swing part (44) disposed on the radial side of the rotating part (43). The swing part (44) is provided with an impact structure (41) and a pushing structure (42) disposed at intervals.

5. The anti-rebound operating mechanism according to claim 4, characterized in that: The clearance part (39) is provided with a first sliding surface (390) that slides with the stop (4). The stop (4) is provided with a slide rail surface (48) that slides with the first sliding surface (390). The first sliding surface (390) is an arc groove recessed towards the rotation center of the stop (3). The slide rail surface (48) is an arc surface protruding away from the rotation center of the stop (4). When the main shaft (2) rotates from the open position to the closed position, it drives the impact structure (41) of the stop (4) to push the clearance part (39), so that the slide rail surface (48) slides with the first sliding surface (390). When the main shaft (2) is in the closed position, the slide rail surface (48) contacts the first sliding surface (390).

6. The anti-rebound operating mechanism according to claim 3, characterized in that: When the main shaft (2) rotates from the closed position to the open position, it drives the push structure (42) of the stop (4) to push the corresponding blocking part (30), causing the blocking part (3) to rotate in the first direction and drive the blocking part (30) on the other side to rotate to the anti-rebound position. When the main shaft (2) rotates from the open position to the closed position, it drives the impact structure (41) of the stop (4) to push a corresponding clearance part (39), so that the blocking part (3) still rotates along the first direction to the position where the clearance part (39) and the stop (4) slide into each other, so that the stop (4) and the clearance part (39) slide into each other and the main shaft (2) rotates to the closed position.

7. The anti-rebound operating mechanism according to claim 3, characterized in that: The blocking member (3) has a quadrilateral structure, including two first sides and two second sides arranged opposite to each other. The blocking part (30) is provided on the two first sides, and the avoidance part (39) is provided on the two second sides. The blocking part (30) is provided with a blocking groove (35) for limiting the impact structure (41), and the avoidance part (39) is provided with a first sliding surface (390) that slides with the stop member (4).

8. The anti-rebound operating mechanism according to claim 7, characterized in that: The length of the second side is greater than the length of the first side, and the distance from the second side to the rotation center of the blocking member (3) is less than the distance from the first side to the rotation center of the blocking member (3).

9. The anti-rebound operating mechanism according to claim 3, characterized in that: When the blocking part (30) rotates to the anti-rebound position, the blocking member (3) is located between the impact structure (41) and the pushing structure (42). One of the two blocking parts (30) of the blocking member (3) faces the impact structure (41) and the other faces the pushing structure (42).

10. The anti-rebound operating mechanism according to claim 1, characterized in that: The blocking part (30) is provided with a blocking groove (35) for limiting the impact structure (41). The blocking groove (35) includes a first blocking surface (31) and a second blocking surface (32) connected to each other. The first blocking surface (31) and the second blocking surface (32) are inclined towards each other to form the blocking groove (35). The impact structure (41) can push the first blocking surface (31) to drive the blocking member (3) to rotate. At the same time, the impact structure (41) slides along the first blocking surface (31) toward the second blocking surface (32). When the second blocking surface (32) comes into contact with the impact structure (41), it abuts against each other to form a dead point.

11. The anti-rebound operating mechanism according to claim 10, characterized in that: The length of the first blocking surface (31) is greater than the length of the second blocking surface (32). The first blocking surface (31) is provided with a blocking section (36). When the impact structure (41) contacts the second blocking surface (32), it can simultaneously contact the blocking section (36). The blocking section (36) is located between the rotation center of the impact structure (41) and the blocking member (3).

12. The anti-rebound operating mechanism according to claim 10, characterized in that: The length of the first blocking surface (31) is greater than the length of the second blocking surface (32), and the slope of the first blocking surface (31) is less than the slope of the second blocking surface (32).

13. The anti-rebound operating mechanism according to claim 4, characterized in that: The pushing structure (42) is connected to the side of the swing part (44) away from the rotating part (43). A first clearance groove (46) is provided at the connection between the swing part (44) and the pushing structure (42). A second clearance groove (47) is provided at the connection between the pushing structure (42) and the swing part (44). The first clearance groove (46) and the second clearance groove (47) are connected. The impact structure (41) is located on the side of the first clearance groove (46) away from the second clearance groove (47). The pushing structure (42) is located on the side of the second clearance groove (47) away from the first clearance groove (46). The distance from the pushing structure (42) to the rotation center of the stop member (4) is greater than the distance from the impact structure (41) to the rotation center of the stop member (4).

14. The anti-rebound operating mechanism according to claim 13, characterized in that: The swing part (44) has an arc-shaped slide rail surface (48) on the side away from the rotating part (43), and the slide rail surface (48) is located on the side of the impact structure (41) away from the pushing structure (42).

15. The anti-rebound operating mechanism according to claim 1, characterized in that: When the main shaft (2) rotates from the closed position to the open position, the push structure (42) pushes the blocking member (3) to rotate from the first position to the second position, so that the blocking part (30) is in the anti-rebound position; When the main shaft (2) rebounds, the impact structure (41) can push the blocking member (3) to rotate from the second position to the third position, so that the impact structure (41) and the blocking part (30) abut against each other to form a dead point to prevent the main shaft (2) from rebounding. When the main shaft (2) is in the open position, the push structure (42) pushes the blocking member (3) to rotate from the third position to the avoidance position, so that the blocking part (30) leaves the anti-rebound position; When the gate is closed, the impact structure (41) pushes the blocking member (3) to rotate from the avoidance position to the first position.

16. The anti-rebound operating mechanism according to claim 1, characterized in that: The operating mechanism also includes a linkage mechanism (11), a drive shaft (12), a cam mechanism, and an energy storage mechanism. The main shaft (2) and the drive shaft (12) are rotatably mounted on two side plates (1). The linkage mechanism (11), the cam mechanism, and the energy storage mechanism are mounted between the two side plates (1). The linkage mechanism (11) is connected to the main shaft (2). The drive shaft (12) drives the energy storage mechanism to store energy through the cam mechanism. The energy storage mechanism that releases energy can drive the linkage mechanism (11) to drive the main shaft (2) to rotate in the closing direction.

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