CN219457500U

CN219457500U - Operating mechanism

Info

Publication number: CN219457500U
Application number: CN202222757676.8U
Authority: CN
Inventors: 严丽君; 敖登贵; 陆登宇; 张新阳; 袁亚; 吴越
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2023-08-01
Anticipated expiration: 2032-10-20

Abstract

The utility model provides an operating device, includes the support and installs link mechanism and rocker arm mechanism on the support respectively, still including connecting link mechanism and rocker arm mechanism between the main extension spring, the main extension spring include with link mechanism rotates the first link of being connected, and with rocker arm mechanism rotates the second link of being connected, rocker arm mechanism can rotate between closing position and separating brake position, be equipped with the promotion structure that is used for promoting link mechanism on the rocker arm mechanism, rocker arm mechanism can drive the second link and rotate around first link, rocker arm mechanism to closing position pivoted in-process, the promotion structure can promote link mechanism and drive first link and rotate around the second link, and then realizes driving main extension spring and cross the dead point fast, avoids above-mentioned motion difficulty or the dead problem of card to appear in the main extension spring.

Description

Operating mechanism

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to an operating mechanism.

Background

The plastic shell breaker is an important electrical element in industrial and civil low-voltage distribution equipment, is used as a branch switch for protecting a low-voltage distribution system, and has the function of short-circuit fault protection. With the construction and development of the power grid and the improvement of the reliability requirement of people on the power grid, the breaking capacity requirement on the plastic shell breaker is continuously improved. On one hand, the requirements for the arc extinguishing capability of the molded case circuit breaker are improved, and on the other hand, the requirements for the operating mechanism performance of the molded case circuit breaker are also improved.

When a large short-circuit current occurs in the circuit, a large amount of arc particles are generated in the process of ablating the arc extinguishing grid plates by the arc, and the arc particles are extremely easy to reversely blow and adhere to the operating mechanism or other parts, such as the rotating shaft, the shell and the like, which are positioned around the arc extinguishing chamber and have air gaps. The plastic shell circuit breaker is required to bear breaking current for more than one time no matter whether the plastic shell circuit breaker is subjected to limit breaking capability test or operation short circuit breaking capability test in authentication test, if an operating mechanism of a product cannot normally break or close after the first short circuit current is broken, secondary breaking of the product is affected, and breaking test of the product is affected.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides an operating mechanism capable of avoiding the situation that the switch cannot be closed.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an operating device, includes the support and installs link mechanism and rocking arm mechanism on the support respectively, still including connecting link mechanism and rocking arm mechanism between the main extension spring, the main extension spring include with link mechanism rotates the first link of being connected, and with the second link that rocking arm mechanism rotated and is connected, rocking arm mechanism can rotate between closing position and separating brake position, be equipped with the promotion structure that is used for promoting link mechanism on the rocking arm mechanism, rocking arm mechanism can drive the second link and rotate around first link, and rocking arm mechanism is to the pivoted in-process of closing position, the promotion structure can promote link mechanism and drive first link and rotate around the second link.

Preferably, the link mechanism comprises a sliding block and at least two links, the at least two links are respectively connected with the sliding block in a rotating way, one link is used for connecting the main tension spring, the other link is used for connecting the moving contact, and the pushing structure drives the links used for connecting the main tension spring to rotate through the sliding block.

Preferably, the support is provided with a sliding groove matched with the sliding block, and the pushing structure pushes the sliding block to move along the length direction of the sliding groove during closing.

Preferably, the pushing structure is provided with a pushing part positioned at the outer side of the bracket, and one end of the sliding block, which is far away from the connecting rod mechanism, penetrates through the sliding groove and extends to the outer side of the bracket to be matched with the pushing part.

Preferably, the sliding groove comprises a first groove, a second groove and a third groove which are respectively communicated with the first groove, and the sliding block slides into the first groove from the joint of the first groove, the second groove and the third groove and moves along the length direction of the first groove under the driving of the pushing structure.

Preferably, the rocker arm mechanism comprises a rocker arm member, the rocker arm member comprises two side plates which are oppositely arranged, and a top plate connected between the two side plates, the two side plates are respectively and rotatably arranged on the bracket, and the pushing structure is arranged on the side plates.

Preferably, the pushing structure comprises a pushing part arranged on the outer side of the corresponding side plate and a bending part connected between the pushing part and the corresponding side plate, and a space for avoiding the bracket is formed between the pushing part and the bending part.

Preferably, the pushing part comprises a first pushing arm and a second pushing arm which are connected, the second pushing arm is connected with the side plate through a bending part, a pushing surface is arranged at one end, far away from the second pushing arm, of the first pushing arm, and the pushing surface is arranged at an oblique angle with the length direction of the first pushing arm.

Preferably, the pushing structures are respectively arranged on the two side plates, and the pushing structures on the two side plates are symmetrically arranged.

Preferably, the link mechanism comprises a jump button, a lock catch, a rebuckling, a crank, a first link, a second link and a third link, wherein the first link and the second link are rotationally connected through a sliding block, one end of the second link, which is far away from the sliding block, is in supporting connection with the contact through the third link, one end of the first link, which is far away from the sliding block, is respectively rotationally connected with a first connecting end of the crank and a main tension spring through a second shaft m, the crank is rotationally connected with the jump button through the first shaft m, a jump button matched limiting part is correspondingly arranged below the jump button, the jump button is in snap fit with the lock catch, the lock catch is in limiting fit with the rebuckling, and the pushing structure drives the first link through the sliding block.

According to the operating mechanism, the rocker arm mechanism can drive the second connecting end of the main tension spring to rotate around the first connecting end, so that the main tension spring is easy to move difficultly or is blocked at a position near a dead point of the main tension spring after friction force is increased due to breaking test or other reasons, and the pushing structure for pushing the connecting rod mechanism is arranged on the rocker arm mechanism, so that the first connecting end at the other end can reversely rotate around the second connecting end, the main tension spring is driven to quickly pass through the dead point, and the problem that the main tension spring is difficult to move or is blocked is avoided.

In addition, through setting up the spout for slider direction and spacing on the support, the structure of directly utilizing current support does not need additionally to set up and is used for the slider direction and spacing structure, has simple structure and characteristics with low costs.

Drawings

FIG. 1 is a schematic structural view of a rocker arm mechanism;

FIG. 2 is a schematic diagram of the opening state of the operating mechanism according to the present utility model;

FIG. 3 is an intermediate process of movement of the operating mechanism of the present utility model from the state of FIG. 2 to the state of FIG. 4;

fig. 4 is a schematic diagram of the closing state of the operating mechanism of the present utility model.

Detailed Description

Embodiments of the operating mechanism of the present utility model are further described below with reference to the examples shown in the drawings. The operating mechanism of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1-2, the operating mechanism of the present utility model includes a bracket 50, a link mechanism and a rocker mechanism respectively mounted on the bracket 50, and further includes a main tension spring 22 connected between the link mechanism and the rocker mechanism, where the main tension spring 22 includes a first connection end 221 rotationally connected with the link mechanism, and a second connection end 220 rotationally connected with the rocker mechanism, where the rocker mechanism can rotate between a closing position and a separating position, the rocker mechanism can drive the second connection end 220 to rotate around the first connection end 221, a pushing structure 451 for pushing the link mechanism is provided on the rocker mechanism, and in the process of rotating the rocker mechanism toward the closing position, the pushing structure 451 can push the link mechanism to drive the first connection end 221 to rotate around the second connection end 220.

In the operating mechanism of the utility model, as the rocker arm mechanism can drive the second connecting end 220 to rotate around the first connecting end 221, the movement difficulty or the blocking of the position near the dead point of the main tension spring 22 is easily caused after the friction force is increased due to breaking test or other reasons, and the pushing structure 451 for pushing the connecting rod mechanism is arranged on the rocker arm mechanism, so that the first connecting end 221 at the other end can reversely rotate around the second connecting end 220, thereby realizing the driving of the main tension spring 22 to quickly pass through the dead point and avoiding the problem of the movement difficulty or the blocking of the main tension spring 22.

As shown in fig. 2, the operating mechanism comprises a bracket 50, a link mechanism, a rocker mechanism and a main tension spring 22, wherein the link mechanism and the rocker mechanism are both arranged on the bracket 50, the rocker mechanism is used for providing a driving force for opening and closing, and a user can manually operate the rocker mechanism or drive the rocker mechanism through an automatic electric operating mechanism such as a motor; the link mechanism is used for driving the moving contact 71 to swing so as to realize opening and closing, the first connecting end 221 of the main tension spring 22 is rotatably installed and linked with the link mechanism, the second connecting end 220 is rotatably installed and linked with the rocker mechanism, the rocker mechanism can rotate between a closing position and a separating position, and the main tension spring 22 is driven to store energy first and then pass through a dead point and then release energy so as to drive the link mechanism to rapidly act. The bracket 50 comprises two fixing plates (only one fixing plate is shown in the figure) which are oppositely arranged, the connecting rod mechanism is arranged at the inner side of the bracket 50, a contact support 70 connected with the connecting rod mechanism is arranged below the connecting rod mechanism, a moving contact 71 is arranged at one end of the contact support 70 extending out of the bracket 50, a fixed contact 72 is arranged below the moving contact 71, and when the rocker arm mechanism rotates to a closing position in the closing direction, the contact support 70 is driven to rotate by the connecting rod mechanism, and the contact support 70 drives the moving contact 71 to rotate so as to be in contact with the fixed contact 72; when the rocker arm mechanism rotates to the opening position in the opening direction, the contact support 70 is driven to rotate by the connecting rod mechanism, and the contact support 70 drives the moving contact 71 to rotate so as to be separated from the fixed contact 72.

The improvement point of the utility model is that the rocker arm mechanism is provided with a pushing structure 451 for pushing the link mechanism, the pushing structure 451 can push the link mechanism in the process of rotating the rocker arm mechanism to the closing position, and the link mechanism drives the first connecting end 221 to rotate around the second connecting end 220 so as to drive the main spring 22 to quickly pass over the dead point, and the problem that the main tension spring 22 is difficult to move or is blocked in the position near the dead point is avoided. That is, in the process of rotating the rocker arm mechanism to the closing position, the rocker arm mechanism drives the second connecting end 220 to rotate around the first connecting end 221 for storing energy, when the main spring 22 approaches to the dead point position, the pushing structure 451 pushes the link mechanism, the link mechanism drives the first connecting end 221 to rotate around the second connecting end 220, energy is released beyond the dead point, so that the situation that the main tension spring 22 moves difficultly or is blocked near the dead point position is avoided, the main tension spring 22 releases energy to drive the link mechanism to act, and then the moving contact 71 is driven to contact with the fixed contact to realize closing.

As shown in fig. 2, the link mechanism includes a slider 26 and at least two links, where the at least two links are respectively connected with the slider 26 in a rotating manner, one of the links is used to connect the main tension spring 22, the other link is used to connect the moving contact 71, the pushing structure 451 is used to push the slider 26, and the link used to connect the main tension spring 22 is driven to rotate by the slider 26.

Specifically, the link mechanism includes a trip 60, a lock catch 13, a rebuckle 15, a crank 30, a first link 27, a second link 28 and a third link 29, where the at least two links are a first link 27 and a second link 28, the first link 27 and the second link 28 are rotationally connected through a slide block 26, one end of the second link 28 away from the slide block 26 is connected with a contact support 70 through the third link 29, a second shaft 16m passes through the first link 27 and the crank 30, a first connection end 221 of the main tension spring 22 is rotationally mounted on the second shaft 16m, one end of the first link 27 away from the slide block 26 is rotationally connected with the first connection end 221 of the crank 30 and the main tension spring 22 through the second shaft 16m, the crank 30 is rotationally connected with the trip 60 through a first shaft 67m, the crank 30 is correspondingly provided with a limit part 31 below the trip 60, the limit part 31 is matched with the trip 60, the lock catch 60 is matched with the lock catch 13, the lock catch 13 is limit matched with the rebuckle 15, the link mechanism is kept in a balanced state when the lock catch mechanism is in the limit state, the lock catch mechanism is capable of driving the lock catch mechanism to drive the tie mechanism to separate from the lock catch 13, and the first connection end of the main tension spring 22 by the lock catch 71, and the first connection end of the main tension spring 22 is further driven to move by the first link mechanism through the first link 71, and the first connection end of the first link mechanism is further driven by the first link mechanism is separated from the first connection end of the first link 71, and the main tension spring is further separated by the link mechanism by the first link mechanism.

It will be appreciated that the pushing structure 451 may also directly push a part of the linkage mechanism, such as the first link 27 or the second link 28. In addition, the linkage mechanism can be realized in various ways, and when the linkage mechanism is realized through the prior art, the linkage mechanism can also be matched with the pushing structure 451 to realize quick closing.

Further, the bracket 50 is provided with a sliding groove 25 matched with the sliding block 26, the pushing structure 451 pushes the sliding block 26 to move along the length direction of the sliding groove 25 (from top to bottom in fig. 2-4) in a direction away from the rocker arm mechanism during closing, the sliding groove 25 is arranged on the bracket 50 to guide and limit the sliding block 26, the structure of the existing bracket 50 is directly utilized, and the structure for guiding and limiting the sliding block 26 is not required to be additionally arranged, so that the device has the characteristics of simple structure and low cost.

Further, the pushing structure 451 is provided with a pushing portion 450 located outside the bracket 50, and an end of the slider 26 away from the linkage mechanism passes through the chute 25 and extends to the outside of the bracket 50 to be matched with the pushing portion 450. By extending the slide block 26 to the outside of the bracket 50 and providing the pushing portion 450 extending to the outside of the bracket 50 on the pushing structure 451 to push the slide block 26, interference between the pushing structure 451 extending to the inside of the bracket 50 and other parts of the link mechanism can be avoided, and the structure is simple and convenient to assemble.

As shown in fig. 4, the sliding groove 25 is T-shaped, the sliding groove 25 includes a first groove 251, and a second groove 252 and a third groove 253 respectively communicating with the first groove 251, the sliding block 26 slides into the first groove 251 from the connection of the first groove 251, the second groove 252 and the third groove 253, and moves along the length direction of the first groove 251 under the driving of the pushing structure 451, and the second groove 252 and the third groove 253 facilitate the sliding block 26 to pass through and be reinstalled in the first groove 251.

As shown in fig. 4, the rocker arm assembly includes a rocker arm member 45 rotatably mounted on the bracket 50, and a handle 41 disposed on the rocker arm member 45, wherein the second connecting end 220 of the main tension spring 22 is connected with the rocker arm member 45, a reset structure 42 is disposed on the rocker arm member 45, and after the trip buckle 60 is tripped from the latch 13, the handle 41 drives the rocker arm assembly to rotate, and the rocker arm assembly can drive the trip buckle 60 to be in re-snap fit with the latch 13 through the reset structure 42.

Specifically, as shown in fig. 1, the rocker arm member 45 includes two side plates 43 that set up relatively, and connect the roof 44 between two side plates 43, roof 44 is connected with handle 41, two side plates 43 keep away from roof 44's one end be equipped with respectively with installation axle complex mounting groove 45, the side plate 43 passes through installation axle 46 rotation and installs on support 50, push structure 451 sets up on the side of side plate 43, is equipped with push structure 451 respectively on one side of two side plates 43, and two side plates 43 keep away from the side of push structure 451 and are equipped with reset structure 42 respectively, be equipped with push structure 451 respectively on two side plates 43, and push structure 451 symmetry on two side plates 43 sets up. Of course, it is also possible to provide the pushing portion 450 on only one of the side plates 43, which falls within the scope of the present utility model. The two side plates 43 are provided with tension spring shaft mounting holes, the tension spring shafts are mounted on the tension spring shaft mounting holes, the second connecting ends 220 of the main tension springs 22 are rotatably mounted on the tension spring shafts, and the rotation of the rocker arm members 45 can drive the second connecting ends 220 of the main tension springs 22 to rotate around the first connecting ends 221.

Further, the pushing structure 451 includes a pushing portion 450 disposed outside the corresponding side plate 43, and a bending portion 4512 connected between the pushing portion 450 and the corresponding side plate 43, and a space for avoiding the bracket 50 is formed between the pushing portion 450 and the bending portion 4512. When the side plate 43 is attached to the bracket 50, the pushing portion 450 forms a space for avoiding the bracket 50 by the bending portion 4512, and interference between the side plate 43 and the bracket 50 can be avoided.

Further, the pushing portion 450 is disposed parallel to the side plate 43, the pushing portion 450 is L-shaped, and includes a first pushing arm 4513 and a second pushing arm 4514 that are connected, the second pushing arm 4514 is connected to the side plate 43 through a bending portion 4512, a pushing surface 4511 is disposed at one end of the first pushing arm 4513 far away from the second pushing arm 4514, the pushing surface 4511 is disposed at an oblique angle with the length direction of the first pushing arm 4513, and the length direction of the first pushing arm 4513 is disposed parallel to the length direction of the side plate 43. Preferably, the first pushing arm 4513 is provided with a protrusion 4515 at an end far from the second pushing arm 4514, and the protrusion 4515 and the second pushing arm 4514 form a groove 4516 on a side of the first pushing arm 4513.

As shown in fig. 2, the operating mechanism is in an opening state, during the closing process, the rocker arm member 45 rotates towards the closing position, that is, from the second end of the stroke to the first end of the stroke, the second connecting end 220 of the main tension spring 22 is driven to rotate around the first connecting end 221 for storing energy, until the main tension spring 22 rotates to the first dead point, that is, the position where the main tension spring 22 is stretched longest, then the main tension spring 22 releases energy to drive the crank 30 to rotate towards the first direction to enable the crank limiting part 31 to be in limiting fit with the jump buckle 60, so that the crank 30 is prevented from rotating towards the first direction, when the crank 30 rotates towards the first direction, the first connecting rod 27 drives the slider 26 to move downwards, that is, move away from the direction in limiting fit with the slide rail 25, and meanwhile, the main tension spring 22 drives the rocker arm member 45 to swing towards the closing position, so that the operating mechanism can be kept in the closing state shown in fig. 4 stably.

However, in a breaking test, a large amount of arc particles are generated in the arc extinguishing chamber, and are pushed by arc air pressure, scattered on the arc extinguishing chamber grid sheet and partially sprayed between the rotating shaft of the moving contact 71 and the shell, and in the process of switching on the product after the product is subjected to the breaking test, as the arc particles are clamped between the rotating shaft of the moving contact 71 and the shell, the friction force is increased when the rotating shaft rotates, so that the sliding block 26 connected with the first connecting rod 27 is difficult to move downwards, namely difficult to move away from the direction in limit fit with the sliding rail 25.

In the closing process of the operating mechanism, as shown in fig. 3, when the main tension spring 22 rotates past the first dead point, the pushing surface 4511 of the pushing structure 451 of the rocker arm member 45 touches the driving slider 26, the rotating handle 41 continues to swing towards the stroke closing position, the rocker arm member 45 continues to press the driving slider 26, and the friction resistance in the rotating process caused by arc particles is overcome, so that the main tension spring 22 smoothly rotates past the first dead point, and the closing action is completed.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims

1. The utility model provides an operating device, includes support (50) and installs link mechanism and rocking arm mechanism on support (50) respectively, still includes and connects main extension spring (22) between link mechanism and the rocking arm mechanism, main extension spring (22) include with link mechanism rotate first link (221) of being connected, and with rocking arm mechanism rotates second link (220) of being connected, rocking arm mechanism can rotate between closing position and separating brake position, its characterized in that: the rocker arm mechanism is provided with a pushing structure (451) for pushing the connecting rod mechanism, the rocker arm mechanism can drive the second connecting end (220) to rotate around the first connecting end (221), and in the process that the rocker arm mechanism rotates towards the closing position, the pushing structure (451) can push the connecting rod mechanism to drive the first connecting end (221) to rotate around the second connecting end (220).

2. The operating mechanism of claim 1, wherein: the connecting rod mechanism comprises a sliding block (26) and at least two connecting rods, the at least two connecting rods are respectively connected with the sliding block (26) in a rotating mode, one connecting rod is used for being connected with the main tension spring (22), the other connecting rod is used for being connected with the movable contact (71), and the pushing structure (451) drives the connecting rod used for being connected with the main tension spring (22) to rotate through the sliding block (26).

3. The operating mechanism of claim 2, wherein: the bracket (50) is provided with a sliding groove (25) matched with the sliding block (26), and the pushing structure (451) pushes the sliding block (26) to move along the length direction of the sliding groove (25) during closing.

4. An operating mechanism according to claim 3, wherein: the pushing structure (451) is provided with a pushing part (450) positioned on the outer side of the bracket (50), and one end, far away from the connecting rod mechanism, of the sliding block (26) penetrates through the sliding groove (25) and extends to the outer side of the bracket (50) to be matched with the pushing part (450).

5. An operating mechanism according to claim 3, wherein: the sliding groove (25) comprises a first groove (251), a second groove (252) and a third groove (253) which are respectively communicated with the first groove (251), and the sliding block (26) slides into the first groove (251) from the joint of the first groove (251), the second groove (252) and the third groove (253) and moves along the length direction of the first groove (251) under the driving of the pushing structure (451).

6. The operating mechanism of claim 1, wherein: the rocker arm mechanism comprises a rocker arm member (45), the rocker arm member (45) comprises two side plates (43) which are oppositely arranged, and a top plate (44) connected between the two side plates (43), the two side plates (43) are respectively rotatably installed on a bracket (50), and the pushing structure (451) is arranged on the side plates (43).

7. The operating mechanism of claim 6, wherein: the pushing structure (451) comprises a pushing portion (450) arranged on the outer side of the corresponding side plate (43), and a bending portion (4512) connected between the pushing portion (450) and the corresponding side plate (43), wherein a space for avoiding the bracket (50) is formed between the pushing portion (450) and the bending portion (4512).

8. The operating mechanism of claim 7, wherein: the pushing part (450) comprises a first pushing arm (4513) and a second pushing arm (4514) which are connected, the second pushing arm (4514) is connected with the side plate (43) through a bending part (4512), a pushing surface (4511) is arranged at one end, far away from the second pushing arm (4514), of the first pushing arm (4513), and the pushing surface (4511) is arranged at an oblique angle with the length direction of the first pushing arm (4513).

9. The operating mechanism of claim 6, wherein: the pushing structures (451) are respectively arranged on the two side plates (43), and the pushing structures (451) on the two side plates (43) are symmetrically arranged.

10. The operating mechanism of claim 1, wherein: the connecting rod mechanism comprises a jump buckle (60), a lock catch (13), a rebuckling (15), a crank (30), a first connecting rod (27), a second connecting rod (28) and a third connecting rod (29), wherein the first connecting rod (27) and the second connecting rod (28) are rotationally connected through a sliding block (26), one end, far away from the sliding block (26), of the second connecting rod (28) is connected with a contact support (70) through the third connecting rod (29), one end, far away from the sliding block (26), of the first connecting rod (27) is respectively rotationally connected with a first connecting end (221) of a crank (30) and a main tension spring (22) through a second shaft (16 m), the crank (30) is rotationally connected with the jump buckle (60) through a first shaft (67 m), a limit part (31) matched with the jump buckle (60) is correspondingly arranged below the jump buckle (60), the jump buckle (60) is in snap fit with the lock catch (13), the lock catch (13) is in limit fit with the rebuckling (15), and the pushing structure (451) drives the first connecting rod (27) through the sliding block (26).