Anti-springback operating mechanism

Abstract

An anti-springback operating mechanism comprises a main shaft capable of rotating between a main shaft switching-on position and a main shaft switching-off position, a moving contact connected with the main shaft, a stop piece linked with the main shaft, a limiting shaft slidably arranged along a guide groove, and a limiting spring connected with the limiting shaft, the stop piece is provided with an annular anti-springback groove, the annular anti-springback groove comprises an opening sliding groove, a limiting sliding groove and a closing sliding groove which are sequentially connected end to end, the limiting shaft slides to an instantaneous position B at the moment when the main shaft rotates to the opening position of the main shaft, and the limiting spring releases energy to drive the limiting shaft to slide along the guide groove and slide into the limiting sliding groove; when the main shaft rebounds during opening, the limiting part of the limiting chute impacts the limiting shaft to prevent the main shaft from rebounding, the main shaft is prevented from rebounding through the limiting shaft, the reliability is high, the installation is convenient, and the service life of the operating mechanism is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low-voltage electrical apparatus, and particularly relates to a bounce-preventing operating mechanism. BACKGROUND

[0002] When the circuit breaker encounters short-circuit current or normal breaking, the main shaft will bounce due to collision when reaching the breaking position, driving the contact to bounce, which causes the arc to not be extinguished in time or the arc to reignite, seriously reducing breaking performance.

[0003] The existing bounce-preventing structure of the operating mechanism of the circuit breaker, such as Chinese patent applications CN107481897A and CN219534441U, usually has a blocking piece and a return spring, and mostly uses the inertia of the blocking piece during breaking to overcome the elastic force of the return spring, and interlocks with the operating mechanism to prevent the contact from bouncing. Such a structure is prone to the following problems: 1. The bounce-preventing function realized by inertia is prone to failure; and 2. The blocking piece with inertia affects the closing operation of the operating mechanism, and the reliability is poor. SUMMARY

[0004] The utility model aims to overcome at least one defect of the prior art and provide a bounce-preventing operating mechanism.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A bounce-preventing operating mechanism includes a side plate and a main shaft rotatably arranged on the side plate, the main shaft is used for being connected with a movable contact and can rotate between a main shaft closing position and a main shaft breaking position,

[0007] The bounce-preventing operating mechanism further includes a stopper linked with the main shaft, a limiting shaft slidingly arranged along a guide groove, and a limiting spring connected with the limiting shaft,

[0008] The stopper is provided with an annular bounce-preventing groove, the annular bounce-preventing groove includes a breaking sliding groove, a limiting sliding groove, and a closing sliding groove connected in sequence, the limiting sliding groove is provided with a limiting part for preventing the main shaft from bouncing, the connecting position of the breaking sliding groove and the closing sliding groove is a closing position A, the connecting position of the limiting sliding groove and the breaking sliding groove is a transient position B, and the connecting position of the limiting sliding groove and the closing sliding groove is a breaking position C;

[0009] The limiting shaft extends into the bounce-preventing groove, and when the main shaft is at the main shaft closing position, the limiting shaft is at the closing position A,

[0010] When the main shaft rotates from the main shaft closing position to the main shaft breaking position, the limiting shaft enters the breaking sliding groove and slidingly cooperates with the breaking sliding groove, and the stopper drives the limiting shaft to slide along the guide groove and stores energy in the limiting spring through the breaking sliding groove,

[0011] The limit shaft slides to the transient position B at the moment when the main shaft rotates to the main shaft opening position; the limit spring drives the limit shaft to slide along the guide groove and slide into the limit sliding groove when the limit shaft slides to the transient position B; when the main shaft opening occurs rebound, the limit part of the limit sliding groove hits the limit shaft to prevent the main shaft from rebounding,

[0012] The limit spring drives the limit shaft to slide along the guide groove to the opening position C when the main shaft opening is in place,

[0013] When the main shaft rotates from the main shaft opening position to the main shaft closing position, the stop rotates to drive the limit shaft to slide from the opening position C to the closing position A along the closing sliding groove.

[0014] Preferably, the groove wall of the limit sliding groove is provided with a limit groove as the limit part.

[0015] Preferably, the opening sliding groove is arc-shaped, and the distance from the connecting end of the opening sliding groove and the closing sliding groove to the rotation axis of the stop is less than the distance from the connecting end of the opening sliding groove and the limit sliding groove to the rotation axis of the stop.

[0016] Preferably, the closing sliding groove is circular arc-shaped.

[0017] Preferably, when the main shaft rotates to the main shaft opening position, the limit sliding groove corresponds to the guide groove.

[0018] Preferably, the guide groove is straight, and the length direction of the guide groove is perpendicular to the axis of the main shaft.

[0019] Preferably, the stop includes a rotating part connected with the main shaft, and a swing part arranged on the radial side of the rotating part, and the swing part is provided with the anti-rebound groove.

[0020] Preferably, the side surface of the swing part is provided with a stop groove, and the stop groove is provided with a stop block, and the stop block includes three side surfaces connected in sequence, and the three side surfaces are opening side, limit side and closing side respectively, and the opening side, the limit side and the closing side respectively form the groove wall of the opening sliding groove, the limit sliding groove and the closing sliding groove with the side wall of the corresponding stop groove.

[0021] Preferably, the limit side is provided with a limit groove recessed to the middle part of the stop block as the limit part.

[0022] Preferably, the opening side is arc-shaped, and the end of the opening side close to the closing position A is provided with a guide surface extending to the closing position A, and the guide surface is curved away from the opening sliding groove; the side wall of the stop groove opposite to the closing side is convex circular arc-shaped, and the closing side is provided with a recessed groove recessed to the middle part of the stop block.

[0023] Preferably, the limiting side includes a first limiting surface and a second limiting surface connected together, the first limiting surface and the second limiting surface forming the limiting groove, the first limiting surface being disposed on the side near the instantaneous position B, the second limiting surface being disposed on the side near the open position C, and the length of the first limiting surface being greater than the length of the second limiting surface.

[0024] Preferably, the anti-rebound operating mechanism further includes a fixedly installed guide plate, the guide plate having a guide groove, and the end of the limiting shaft away from the stop member being inserted into the guide groove for sliding engagement.

[0025] Preferably, the side plate also serves as the guide plate and is provided with the guide groove.

[0026] Preferably, the limiting shaft includes a first limiting part and a second limiting part. The first limiting part is located in the anti-rebound groove, and the second limiting part passes through the guide groove. The diameter of the first limiting part is larger than the diameter of the second limiting part. An annular stepped surface is provided at the end where the first limiting part and the second limiting part are connected. The stepped surface cooperates with the side of the guide plate.

[0027] Preferably, the guide plate has a limiting ring on the side away from the stop member that is connected to the second limiting part, and the limiting ring is in a limiting cooperation with the side of the guide plate away from the stop member.

[0028] Preferably, the end of the second limiting part away from the first limiting part is located on the side of the guide plate away from the stop member, and the limiting spring is located on the side of the guide plate away from the stop member and connected to the second limiting part.

[0029] The anti-rebound operating mechanism of this embodiment has a stop plate with a tripping groove, a limit groove, and a closing groove that slide in conjunction with the limit shaft. When the main shaft drives the stop plate to rotate, the limit shaft slides along the tripping groove, the limit groove, and the closing groove. When the main shaft has a rebound tendency, the limit shaft is sliding in the limit groove. The rebound of the main shaft will cause the stop block to collide with the limit shaft. The limit shaft prevents the main shaft from rebounding. It has high reliability and is easy to install, which greatly extends the service life of the operating mechanism.

[0030] In addition, the limiting side is provided with a limiting groove recessed into the middle of the stop block as the limiting part. When the main shaft generates a springback tendency and drives the stop block to collide with the limiting shaft, the limiting groove can play the role of limiting the limiting shaft, and can also reduce the component force in other directions, such as reducing the component force along the length of the guide groove, and preventing the limiting shaft from moving back. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the anti-rebound operating mechanism of this utility model in the first embodiment;

[0032] Figure 2This is a schematic diagram showing the fit between the stop, the stop plate, and the limiting shaft of this utility model;

[0033] Figure 3 This is a schematic diagram showing the cooperation of the limiting shaft, limiting spring, and stop plate of this utility model;

[0034] Figure 4 This is a structural schematic diagram of the stop component of this utility model;

[0035] Figure 5 This is a top view of the anti-rebound operating mechanism of this utility model;

[0036] Figure 6 This is a utility model Figure 5 A magnified view of a portion of the image;

[0037] Figure 7 This is a schematic diagram of the anti-rebound operating mechanism of this utility model in the second embodiment;

[0038] Figure 8 This is a schematic diagram of the anti-rebound operating mechanism of this utility model when the switch is closed.

[0039] Figure 9 This is a schematic diagram of the anti-rebound operating mechanism of this utility model when it starts to open;

[0040] Figure 10 This is a schematic diagram of the opening process of the anti-rebound operating mechanism of this utility model;

[0041] Figure 11 This is a schematic diagram of the anti-rebound operating mechanism of this utility model when it has just reached the open position but has not yet generated a rebound trend;

[0042] Figure 12 This is a schematic diagram of the structure of the anti-rebound operating mechanism of this utility model at the instant before it generates a rebound tendency;

[0043] Figure 13 This is a schematic diagram of the anti-rebound operating mechanism of this utility model when it generates a rebound tendency;

[0044] Figure 14 This is a schematic diagram of the anti-rebound operating mechanism of this utility model when the switch is fully open;

[0045] Figure 15 This is a schematic diagram of the closing process of the anti-rebound operating mechanism of this utility model;

[0046] In the picture:

[0047] A Closing Position 63 Closing Side

[0048] B instantaneous position 64 guide surface

[0049] C-type tripping position 65-degree limiting groove

[0050] 2. Stop component 66 First limiting surface

[0051] 3 limiting axis 67 second limiting surface

[0052] 4 limit springs and 69 clearance grooves

[0053] 6 Stop block 31 First limit part

[0054] 7 guide plate 32 second limiting part

[0055] 11 side panels, 33 steps

[0056] 12 spindles, 34 limit rings

[0057] 13-linkage mechanism, 51-speed tripping slide.

[0058] 14 drive shafts, 52 limit slides

[0059] 15 cantilever 53 closing slide

[0060] 16 tripping stop shaft 71 guide groove

[0061] 40 Spring Shaft 201 Rotating Part

[0062] 61 Side of tripping switch 202 swing section

[0063] 62 Limiting Side Detailed Implementation

[0064] The specific implementation of the anti-rebound operating mechanism of this utility model is further described below with reference to the embodiments shown in the accompanying drawings. The anti-rebound operating mechanism of this utility model is not limited to the description of the following embodiments.

[0065] like Figure 1As shown, the anti-rebound operating mechanism of this embodiment is typically used in frame-type circuit breakers. A frame-type circuit breaker typically includes a base, within which multiple fixedly connected contact supports are arranged side-by-side. Each contact support has multiple moving contacts. An operating mechanism is located on the top side of the base. The operating mechanism includes a side plate 11, a main shaft 12, a linkage mechanism 13, a drive shaft 14, a cam mechanism, and an energy storage mechanism. The main shaft 12 and drive shaft 14 are rotatably mounted on two side plates 11. The linkage mechanism 13, cam mechanism, and energy storage mechanism are installed between the two side plates 11. The main shaft 12 is used to connect with the moving contacts. The moving contact swings, and the linkage mechanism 13 is connected to the main shaft 12. The main shaft 12 is provided with a cantilever 15 that is connected to the contact support, which is used to drive the moving contact to contact and separate from the stationary contact. The drive shaft 14 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 the open state and the operating mechanism is in the energy storage state, the energy storage mechanism can be driven to release energy through the closing button. The released energy storage mechanism drives the linkage mechanism 13 to drive the main shaft 12 to rotate in the closing direction, thereby driving the moving contact to contact the stationary contact and realize the closing.

[0066] The linkage mechanism 13 typically includes a rotatably connected transmission component and a jump catch, as well as a latch for locking the jump catch. When the latch locks the jump catch, the linkage mechanism 13 can drive the drive spindle 12 to rotate, causing the moving contact to contact and separate from the stationary contact, and storing energy in the contact spring when the moving contact contacts the stationary contact. When the latch unlocks the jump catch, it releases the contact spring. The released energy of the contact spring drives the spindle 12 to rotate through the linkage mechanism 13, causing the moving contact to separate from the stationary contact. The operating mechanism is prior art in this field and will not be described in detail here.

[0067] The main shaft 12 can rotate between the main shaft closed position and the main shaft open position, causing the moving contact to contact and separate from the stationary contact. Multiple cantilever arms 15 are also fixedly installed on the main shaft 12. Some of the cantilever arms 15 are connected to the contacts via connecting rods, and at least one cantilever arm 15 cooperates with the tripping stop shaft 16 to limit the main shaft 12's open position. When the circuit breaker encounters a short-circuit current interruption, the operating mechanism drives the main shaft 12 to rotate via the linkage mechanism 13, causing the moving contact to separate from the stationary contact. When the main shaft 12 reaches the main shaft open position, it will bounce back due to collision with the tripping stop shaft 16, causing the contacts to bounce back, resulting in the arc not being extinguished in time or the arc reigniting, severely reducing the breaking performance. In this embodiment, two cantilever arms 15 are arranged opposite each other on both sides of the operating mechanism, respectively used to cooperate with the tripping stop shaft 16 to limit the main shaft 12's open position.

[0068] like Figures 1-6As shown, an improvement in this embodiment is that the anti-rebound operating mechanism further includes a stop 2 linked to the main shaft 12, a limiting shaft 3 slidably disposed along the guide groove 71, and a limiting spring 4 connected to the limiting shaft 3. The stop 2 is provided with an annular anti-rebound groove. The annular anti-rebound groove includes a tripping slide 51, a limiting slide 52, and a closing slide 53 connected end to end in sequence. The limiting slide 52 is provided with a limiting part for preventing the main shaft 12 from rebounding. The connection point between the tripping slide 51 and the closing slide 53 is the closing position A. The connection point between the limiting slide 52 and the tripping slide 51 is the instantaneous position B. The connection point between the limiting slide 52 and the closing slide 53 is the tripping position C.

[0069] When the limiting shaft 3 extends into the anti-rebound groove, and the main shaft 12 rotates from the main shaft closed position to the main shaft open position, it drives the stop 2 to rotate, causing the limiting shaft 3 to enter the open slide groove 51 and slide in cooperation with the open slide groove 51. The stop 2 drives the limiting shaft 3 to slide along the guide groove 71 through the open slide groove 51 and causes the limiting spring 4 to store energy.

[0070] During the process of the main shaft 12 rotating from the main shaft closed position to the main shaft open position, the limit shaft 3 slides towards the instantaneous position B;

[0071] Just before the main shaft 12 rebounds at the moment it rotates to the main shaft open position, the limit shaft 3 slides to the instantaneous position B. When the limit shaft 3 slides to the instantaneous position B, the limit spring 4 releases energy and drives the limit shaft 3 to slide along the guide groove 71 and into the limit slide groove 52. When the main shaft 12 rebounds after opening, the limit part of the limit slide groove 52 hits the limit shaft 3 to prevent the main shaft 12 from rebounding.

[0072] When the main shaft 12 is in the open position, that is, when the main shaft 12 is stably in the open position, the limit spring 4 drives the limit shaft 3 to slide along the guide groove 71 to the open position C. When the main shaft 12 rotates from the open position to the closed position, it drives the stop 2 to rotate, causing the limit shaft 3 to slide along the closing slide groove 53 from the open position C to the closed position A.

[0073] The anti-rebound operating mechanism of this embodiment is provided with a tripping groove 51, a limiting groove 52, and a closing groove 53 in the stop plate 7 that slide in cooperation with the limiting shaft 3. When the main shaft 12 drives the stop plate 7 to rotate, the limiting shaft 3 slides along the tripping groove 51, the limiting groove 52, and the closing groove 53. When the main shaft 12 has a rebound tendency, the limiting shaft 3 is sliding in the limiting groove 52. The rebound of the main shaft 12 will cause the stop block 6 to collide with the limiting shaft 3. The limiting shaft 3 prevents the main shaft 12 from rebounding. It does not require the use of inertia and other complex mechanisms, and has the characteristics of simple structure, few parts, and low cost.

[0074] like Figures 2-4In the illustrated embodiment, the stop member 2 is provided with a stop groove, and a stop block 6 protrudes from the stop groove, forming an annular anti-rebound groove between the stop block 6 and the side wall of the stop groove. The anti-rebound groove includes a tripping slide 51, a limiting slide 52, and a closing slide 53 connected in sequence. The tripping slide 51 and the closing slide 53 are set at an oblique angle. The two ends of the limiting slide 52 are respectively connected to the tripping slide 51 and the closing slide 53. The connection point between the tripping slide 51 and the closing slide 53 is the closing position A, the connection point between the limiting slide 52 and the tripping slide 51 is the instantaneous position B, and the connection point between the limiting slide 52 and the closing slide 53 is the tripping position C.

[0075] Furthermore, the opening slide 51 is arc-shaped, and the distance from the end of the opening slide 51 connected to the closing slide 53 to the rotation axis of the stop 2 is less than the distance from the end of the opening slide 51 connected to the limit slide 52 to the rotation axis of the stop 2. That is, the distance from the closing position A to the rotation axis of the stop 2 is less than the distance from the instantaneous position B to the rotation axis of the stop 2. Thus, as the stop 2 rotates from the main shaft closing position to the main shaft opening position, it pushes the limit shaft 3 to slide along the guide groove 71 through the groove wall of the opening slide 51, causing the limit shaft 3 to move from the closing position A to the instantaneous position B. The arc shape of the opening slide 51 facilitates sliding cooperation with the limit shaft 3 and pushes the limit shaft 3. Of course, in other embodiments, the opening slide 51 can also be a non-arc-shaped groove with an inclined setting.

[0076] Furthermore, the closing slide 53 is arc-shaped, and the distance from the closing position A to the rotation axis of the stop 2 is approximately equal to or nearly equal to the distance from the opening position C to the rotation axis of the stop 2. Thus, when the stop 2 rotates from the main shaft opening position to the main shaft closing position, the closing slide 53 essentially avoids the limiting shaft 3, or slightly pushes the limiting shaft 3 to slide along the guide groove 71, causing the limiting shaft 3 to move from the opening position C to the closing position A. Of course, the closing slide 53 can also be a non-arc-shaped groove, in which case the limiting shaft 3 is pushed to slide along the guide groove 71 simultaneously with the rotation of the stop 2.

[0077] In this embodiment, the groove wall of the limiting slide 52 is provided with a limiting groove 65 as the limiting part, which is used to prevent the rebound caused by the collision between the main shaft 12 and the stop shaft 16.

[0078] like Figures 1-6In the first embodiment shown, the anti-rebound operating mechanism further includes a guide plate 7 fixedly mounted on the circuit breaker base. The guide plate 7 is provided with the guide groove 71. The end of the limiting shaft 3 away from the stop member 2 is inserted into the guide groove 71 for sliding engagement. The guide groove 71 is used to limit the limiting shaft 3, so that the limiting shaft 3 can only slide along the guide groove 71. The guide groove 71 can not only guide the movement direction of the limiting shaft 3, but also provide support for the limiting shaft 3 when it collides with the stop member 2, so that the limiting shaft 3 can reliably limit the stop member 2.

[0079] Preferably, the anti-rebound operating mechanism includes two stop members 2 and two guide plates 7. The two stop members 2 are arranged opposite each other on both sides of the operating mechanism along the axial direction of the main shaft 12. The main shaft 12 is correspondingly provided with two guide plates 7, and the two stop members 2 respectively cooperate with the corresponding guide plates 7 through limiting shafts 3. Preferably, the guide groove 71 is straight, and the length direction of the guide groove 71 is perpendicular to the axis of the main shaft 12. It should be noted that, as in other embodiments, the guide groove 71 can also be inclined or have a certain curvature.

[0080] like Figure 7 In the second embodiment shown, the side plate 11 of the operating mechanism constitutes the guide plate 7, that is, the side plate 11 is provided with a guide groove 71, and the end of the limiting shaft 3 away from the stop member 2 is inserted into the guide groove 71 for sliding engagement. The guide groove 71 is used to limit the limiting shaft 3 so that the limiting shaft 3 can only slide along the guide groove 71.

[0081] like Figures 2-4 In the first embodiment shown, the stop member 2 includes a rotating part 201 and a swing part 202 disposed on one radial side of the rotating part 201. The rotating part 201 has a through hole connected to the main shaft 12, and the swing part 202 has the anti-rebound groove. Specifically, the side of the swing part 202 is provided with a stop groove, and a stop block 6 is provided in the stop groove. The stop block 6 is approximately triangular and includes three side surfaces connected end to end in sequence. The three side surfaces are a tripping side surface 61, a limiting side surface 62, and a closing side surface 63. The tripping side surface 61, the limiting side surface 62, and the closing side surface 63, together with their respective opposite stop groove side walls, form the groove walls of the tripping slide groove 51, the limiting slide groove 52, and the closing slide groove 53.

[0082] Furthermore, the opening side 61 is arc-shaped, and the end of the opening side 61 near the closing position A is provided with a guide surface 64 extending toward the closing position A. The guide surface 64 is bent away from the opening slide groove 51. The guide surface 64 is used to avoid and guide the limit shaft 3 into the opening slide groove 51 when the opening begins. The middle part of the opening side 61 is used to push the limit shaft 3 to move along the guide groove 71 during the opening process.

[0083] Furthermore, the limiting side 62 is provided with a limiting groove 65 recessed into the center of the stop block 6 as the limiting part. When the main shaft 12 generates a springback tendency and causes the stop block 6 to collide with the limiting shaft 3, the limiting groove 65 can limit the movement of the limiting shaft 3 and also reduce the component force in other directions, such as reducing the component force along the length direction of the guide groove 71, thus preventing the limiting shaft 3 from moving back. Of course, the limiting groove 65 may not be provided, or an inclined surface may be provided with the impact position perpendicular to the guide groove 71, both of which fall within the protection scope of this utility model.

[0084] Preferably, the limiting side 62 includes a first limiting surface 66 and a second limiting surface 67 connected to each other. The first limiting surface 66 and the second limiting surface 67 form the limiting groove 65. The first limiting surface 66 is disposed on the side near the instantaneous position B, and the second limiting surface 67 is disposed on the side near the open position C. Preferably, the length of the first limiting surface 66 is greater than the length of the second limiting surface 67.

[0085] Furthermore, the closing slide groove 53 is approximately arc-shaped, and the side wall of the stop groove opposite to the closing side 63 is a raised arc shape. The closing side 63 is provided with a relief groove 69 that is recessed towards the middle of the stop block 6. The groove wall of the closing slide groove 53 opposite to the closing side 63 is a raised arc shape. In this way, the approximately arc-shaped closing slide groove 53 can avoid the limit shaft 3 from blocking the stop 2 when closing, so that the main shaft 12 can close smoothly.

[0086] like Figure 6 As shown, the limiting shaft 3 includes a first limiting part 31 and a second limiting part 32. The first limiting part 31 is located in the opening slide groove 51, the limiting slide groove 52 and the closing slide groove 53 of the stop member 2. The second limiting part 32 passes through the guide groove 71. The diameter of the first limiting part 31 is larger than the diameter of the second limiting part 32. An annular stepped surface 33 is provided at the end where the first limiting part 31 and the second limiting part 32 are connected. The stepped surface 33 cooperates with the side of the guide plate 7 to prevent the second limiting part 32 from moving away from the stop member 2.

[0087] Furthermore, the end of the second limiting part 32 away from the first limiting part 31 is located on the side of the guide plate 7 away from the stop member 2. The limiting spring 4 is located on the side of the guide plate 7 away from the stop member 2 and is connected to the second limiting part 32. The side of the guide plate 7 away from the stop member 2 is provided with a limiting ring 34 connected to the second limiting part 32. The limiting ring 34 is in a limiting cooperation with the side of the guide plate 7 away from the stop member 2.

[0088] Furthermore, the limiting ring 34 is provided with an annular spring groove (not shown in the figure), and the limiting spring 4 is hung in the spring groove. Alternatively, the second limiting part 32 is provided with a clamp spaced apart from the limiting ring 34, and the limiting spring 4 is hung in the gap between the clamp and the limiting ring 34. The guide plate 7 is provided with a spring shaft 40 connected to the other end of the limiting spring 4.

[0089] The specific operation process in this embodiment is as follows:

[0090] like Figure 8 As shown, when the operating mechanism is in the closed position, the main shaft 12 is in the main shaft closed position, and the limit shaft 3 is in the closed position A;

[0091] When the operating mechanism begins to open, the main shaft 12 rotates from the main shaft closed position to the main shaft open position, and the stop 2 rotates clockwise together with the main shaft 12. Figure 9 The position shown allows the limiting shaft 3 to enter the tripping slide groove 51 and slide in cooperation with the limiting slide groove 52. The limiting shaft 3 contacts one side wall of the tripping slide groove 51, that is, it contacts the guide surface 64 on the stop block 6. As the stop 2 rotates, the guide surface 64 on the stop block 6 pushes the limiting shaft 3 to overcome the elastic force of the limiting spring 4 and slide along the guide groove 71, causing the limiting spring 4 to store energy. Furthermore, as the stop 2 rotates, the limiting shaft 3 slides under the guidance of the guide surface 64 to... Figure 10 The position of the tripping slide 51 is shown;

[0092] like Figure 11 As shown, at the instant the main shaft 12 rotates to the main shaft open position, that is, at the instant the cantilever 15 and the open stop shaft 16 are about to contact or at the instant of contact, the limiting groove 52 corresponds to the guide groove 71, and the limiting shaft 3 slides to the instantaneous position B. At this instant, the main shaft 12 has not yet had time to rebound, and the limiting spring 4 releases energy to pull the limiting shaft 3 along the guide groove 71 to Figure 12 The position of the limiting groove 52 shown is such that the limiting shaft 3 basically corresponds to the first limiting surface 66 and the second limiting surface 67 of the limiting groove 65;

[0093] like Figure 13 As shown, due to the collision between the cantilever 15 and the tripping stop shaft 16, the main shaft 12 rebounds, and the main shaft 12 drives the stop 2 to rotate counterclockwise. The upper limit part of the groove wall of the limit slide 52 collides with the limit shaft 3, preventing the main shaft 12 from rebounding.

[0094] like Figure 14 As shown, after the limit shaft 3 blocks the main shaft 12 from rebounding, the main shaft 12 is reset to the main shaft open position under the action of the operating mechanism, that is, the main shaft 12 is in the open position. The limit spring 4 pulls the limit shaft 3 to slide along the guide groove 71 to Figure 14 The circuit breaker position C is shown.

[0095] When the circuit breaker closes again, the main shaft 12 rotates from the open position to the closed position. The main shaft 12 rotates counterclockwise, causing the stop 2 to rotate and the limit shaft 3 to pass through the closing slide groove 53 from the open position C. Figure 15 After moving to the position shown in the closing slide 53, it will move to... Figure 8 The closing position A is shown.

[0096] 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.

[0097] 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 side plate (11) and a main shaft (12) rotatably disposed on the side plate (11), the main shaft (12) being connected to a moving contact and capable of rotating between a main shaft closed position and a main shaft open position, characterized in that: The anti-rebound operating mechanism also includes a stop (2) linked to the main shaft (12), a limiting shaft (3) slidably disposed along the guide groove (71), and a limiting spring (4) connected to the limiting shaft (3). The stop member (2) is provided with an annular anti-rebound groove. The annular anti-rebound groove includes a tripping slide (51), a limiting slide (52), and a closing slide (53) connected end to end in sequence. The limiting slide (52) is provided with a limiting part for preventing the main shaft (12) from rebounding. The connection between the tripping slide (51) and the closing slide (53) is the closing position (A). The connection between the limiting slide (52) and the tripping slide (51) is the instantaneous position (B). The connection between the limiting slide (52) and the closing slide (53) is the tripping position (C). When the limiting shaft (3) extends into the anti-rebound groove, and the main shaft (12) is in the main shaft closed position, the limiting shaft (3) is in the closed position (A). When the main shaft (12) rotates from the main shaft closed position to the main shaft open position, it drives the stop (2) to rotate, causing the limit shaft (3) to enter the open sliding groove (51) and slide in cooperation with the open sliding groove (51). The stop (2) drives the limit shaft (3) to slide along the guide groove (71) through the open sliding groove (51) and causes the limit spring (4) to store energy. At the instant the main shaft (12) rotates to the main shaft open position, the limit shaft (3) slides to the instantaneous position (B); when the limit shaft (3) slides to the instantaneous position (B), the limit spring (4) releases energy and drives the limit shaft (3) to slide along the guide groove (71) and into the limit slide groove (52). When the main shaft (12) rebounds after opening, the limiting part of the limit slide groove (52) hits the limit shaft (3) to prevent the main shaft (12) from rebounding. When the main shaft (12) is in the open position, the limit spring (4) drives the limit shaft (3) to slide along the guide groove (71) to the open position (C). When the main shaft (12) rotates from the main shaft open position to the main shaft closed position, it drives the stop (2) to rotate, causing the limit shaft (3) to slide along the closing slide groove (53) from the open position (C) to the closed position (A).

2. The anti-rebound operating mechanism according to claim 1, characterized in that: The wall of the limiting groove (52) is provided with a limiting groove (65) as the limiting part.

3. The anti-rebound operating mechanism according to claim 1, characterized in that: The opening slide (51) is arc-shaped, and the distance from the end of the opening slide (51) and the closing slide (53) to the rotation axis of the stop (2) is less than the distance from the end of the opening slide (51) and the limit slide (52) to the rotation axis of the stop (2).

4. The anti-rebound operating mechanism according to claim 1, characterized in that: The closing slide (53) is arc-shaped.

5. The anti-rebound operating mechanism according to claim 1, characterized in that: When the main shaft (12) rotates to the main shaft open position, the limit slide (52) corresponds to the guide groove (71).

6. The anti-rebound operating mechanism according to claim 1, characterized in that: The guide groove (71) is a straight line, and the length direction of the guide groove (71) is perpendicular to the axis of the main shaft (12).

7. The anti-rebound operating mechanism according to claim 1, characterized in that: The stop member (2) includes a rotating part (201) connected to the main shaft (12) and a swing part (202) disposed on the radial side of the rotating part (201), wherein the swing part (202) is provided with the anti-rebound groove.

8. The anti-rebound operating mechanism according to claim 7, characterized in that: The side of the swing part (202) is provided with a stop groove, and a stop block (6) is provided in the stop groove. The stop block (6) includes three side surfaces connected end to end in sequence. The three side surfaces are the opening side surface (61), the limiting side surface (62), and the closing side surface (63). The opening side surface (61), the limiting side surface (62), and the closing side surface (63) respectively form the groove walls of the opening slide groove (51), the limiting slide groove (52), and the closing slide groove (53) with their respective opposite stop groove side walls.

9. The anti-rebound operating mechanism according to claim 8, characterized in that: The limiting side (62) is provided with a limiting groove (65) recessed into the middle of the stop block (6) as the limiting part.

10. The anti-rebound operating mechanism according to claim 8, characterized in that: The side of the circuit breaker (61) is arc-shaped. The side of the circuit breaker (61) near the closing position (A) is provided with a guide surface (64) extending toward the closing position (A). The guide surface (64) bends away from the side of the circuit breaker slide (51). The side wall of the stop groove opposite to the closing side (63) is a raised arc shape. The closing side (63) is provided with a relief groove (69) recessed toward the middle of the stop block (6).

11. The anti-rebound operating mechanism according to claim 9, characterized in that: The limiting side (62) includes a first limiting surface (66) and a second limiting surface (67) connected to each other. The first limiting surface (66) and the second limiting surface (67) form the limiting groove (65) opposite to each other. The first limiting surface (66) is located on the side near the instantaneous position (B), and the second limiting surface (67) is located on the side near the open position (C). The length of the first limiting surface (66) is greater than the length of the second limiting surface (67).

12. The anti-rebound operating mechanism according to claim 1, characterized in that: The anti-rebound operating mechanism also includes a fixed guide plate (7), which has a guide groove (71). The end of the limiting shaft (3) away from the stop (2) is inserted into the guide groove (71) for sliding engagement.

13. The anti-rebound operating mechanism according to claim 1, characterized in that: The side plate (11) also serves as the guide plate (7) and is provided with the guide groove (71).

14. The anti-rebound operating mechanism according to claim 12, characterized in that: The limiting shaft (3) includes a first limiting part (31) and a second limiting part (32). The first limiting part (31) is located in the anti-rebound groove, and the second limiting part (32) passes through the guide groove (71). The diameter of the first limiting part (31) is larger than the diameter of the second limiting part (32). An annular stepped surface (33) is provided at the end where the first limiting part (31) and the second limiting part (32) are connected. The stepped surface (33) cooperates with the side of the guide plate (7).

15. The anti-rebound operating mechanism according to claim 14, characterized in that: The guide plate (7) is provided with a limiting ring (34) connected to the second limiting part (32) on the side away from the stop (2), and the limiting ring (34) is in a limiting cooperation with the side of the guide plate (7) away from the stop (2).

16. The anti-rebound operating mechanism according to claim 14, characterized in that: The end of the second limiting part (32) away from the first limiting part (31) is located on the side of the guide plate (7) away from the stop member (2), and the limiting spring (4) is located on the side of the guide plate (7) away from the stop member (2) and connected to the second limiting part (32).

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