CN220065599U - Plastic case type breaker operating mechanism - Google Patents
Plastic case type breaker operating mechanism Download PDFInfo
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- CN220065599U CN220065599U CN202321740298.0U CN202321740298U CN220065599U CN 220065599 U CN220065599 U CN 220065599U CN 202321740298 U CN202321740298 U CN 202321740298U CN 220065599 U CN220065599 U CN 220065599U
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- movable contact
- rotating shaft
- operating mechanism
- shaft
- connecting rod
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- 238000004146 energy storage Methods 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000000306 component Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
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Abstract
The utility model relates to an operating mechanism of a plastic shell type breaker, which comprises an operating handle, a rocker arm, a jump fastener, an upper connecting rod, a lower connecting rod, a rotating shaft, a moving contact and an energy storage spring, wherein the rocker arm can rotate around a point G; the utility model provides a plastic shell type breaker operating mechanism with a larger output rotation angle, which has the advantages of improving the safety and improving the breaking performance Icu and Ics, wherein the rotation angle between the opening and closing positions of a moving contact is 75-145 degrees.
Description
Technical Field
The utility model particularly relates to a plastic shell type breaker operating mechanism.
Background
The operating mechanism is a core component in the circuit breaker and is used for power transmission of opening and closing operation and achieving the purpose of free tripping and opening. Generally speaking, an operating mechanism in a plastic shell type circuit breaker generally comprises a trip piece, an upper connecting rod, a lower connecting rod, a rotating shaft and an energy storage spring which are hinged in sequence, when the trip piece is locked, the energy storage spring stores energy, the upper connecting rod, the lower connecting rod and the rotating shaft form a four-bar mechanism, an arm rotates, the trip piece is unlocked through the transmission of switching on of the four-bar mechanism, the trip piece, the upper connecting rod, the lower connecting rod and the rotating shaft form a five-bar mechanism, and the energy storage spring releases energy to drive the five-bar mechanism to achieve free tripping and switching off. At present, the angle of the conventional operating mechanism in the market for driving the moving contact to turn on and off is generally about 30 degrees, and the breaking distance is smaller.
Disclosure of Invention
The utility model provides a plastic shell type breaker operating mechanism for solving the technical problems.
The technical scheme adopted by the utility model is as follows: the operating mechanism of the plastic shell type breaker comprises an operating handle, a rocker arm, a jump fastener, an upper connecting rod, a lower connecting rod, a rotating shaft, a moving contact and an energy storage spring, wherein the rocker arm can rotate around a point G; the operating mechanism is provided with an energy storage state and an energy release state, the position of the jump fastener is fixed in the energy storage state, the energy storage spring is stretched to store energy, the operating handle can drive the moving contact to rotate between opening and closing positions, the jump fastener can rotate around a T point in the energy release state, and the moving contact rotates from the closing position to the opening position under the action of energy release shrinkage of the energy storage spring; the rotating angle between the opening and closing positions of the moving contact is 75-145 degrees.
The length AB between two hinge points of the upper connecting rod and the length BC between two hinge points of the lower connecting rod and the rotating shaft force arm OC=33:32.5:16, the rotating angle alpha of the upper connecting rod=54°, and the rotating angle between the opening and closing positions of the moving contact is 104.5 °.
The rocker arm is limited on the installation frame to enable the rocker arm to rotate around the point G relative to the installation frame, and the jump fastener is hinged with the installation frame through a T shaft.
The rocker arm is provided with two side plate support arms and a middle connecting plate, the bottoms of the side plate support arms are cylindrical curved surfaces, and the middle connecting plate is connected with an operating handle and an energy storage spring; the installation frame comprises two support components and a plurality of shafts connected between the two support components, one side plate support arm is matched with one support component, grooves with cylindrical concave surfaces are formed in the bottoms of the corresponding side plate support arms on the support components, inner limit ribs and outer limit ribs are arranged on the two sides of the corresponding side plate support arms, and the side plate support arms penetrate through the positions between the inner limit ribs and the outer limit ribs and are supported in the grooves with the cylindrical concave surfaces at the bottoms.
The energy storage spring is characterized in that a spring installation through hole is formed in the middle connecting plate, pin shaft limiting grooves are formed in the two sides of the spring installation through hole in the upper surface of the middle connecting plate, and the energy storage spring stretches into the spring installation through hole and is connected with a limiting pin shaft which is arranged in the pin shaft limiting grooves.
The bottom of the bracket piece is provided with a mounting plate with a through hole.
The movable contact is characterized in that a movable contact mounting groove is formed in the rotating shaft, one end of the movable contact is fixedly arranged in the movable contact mounting groove to be matched with the rotating shaft, and the other end of the movable contact extends out of the movable contact mounting groove to be used for switching on and off.
The movable contact mounting groove is L-shaped in cross section and forms an opening for mounting the movable contact on the outer wall of the rotating shaft, the inner wall of the movable contact mounting groove is provided with a first limiting wall and a second limiting wall, the rotating shaft is provided with a first pin shaft through hole which penetrates through, one end of the movable contact, which is positioned in the movable contact mounting groove, is L-shaped, is provided with a third limiting wall and a fourth limiting wall which are respectively in limiting fit with the first limiting wall and the second limiting wall, and is provided with a second pin shaft through hole which is concentrically arranged corresponding to the first pin shaft through hole, the movable contact is connected with the rotating shaft through the connecting pin shaft penetrating through the first pin shaft through hole and the second pin shaft through hole, and the first limiting wall, the third limiting wall, the second limiting wall and the fourth limiting wall are matched to respectively form rotation in two directions of the rotating shaft to drive the movable contact to rotate.
The central shaft of the connecting pin shaft is positioned at the point O, one end of the moving contact, which is positioned in the moving contact mounting groove, is provided with a connecting part for connecting the soft connecting wire, and an opening for the soft connecting wire to pass through is arranged on the outer wall of the rotating shaft and at the corresponding connecting part between the moving contact and the outer wall of the rotating shaft.
The beneficial effects of the utility model are as follows: the utility model provides a plastic shell type breaker operating mechanism with a larger output rotation angle, which improves the safety and the breaking performance Icu and Ics.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is a schematic view of an operating mechanism according to an embodiment of the present utility model;
FIG. 2 is an exploded view of an operating mechanism according to one embodiment of the present utility model;
FIG. 3 is a cross-sectional view of an operating mechanism according to one embodiment of the present utility model;
FIG. 4 is a schematic diagram illustrating the operation of the operating mechanism according to an embodiment of the present utility model;
FIG. 5 is a schematic view of a rocker arm according to an embodiment of the present utility model;
FIG. 6 is a schematic view of a mounting frame according to an embodiment of the present utility model;
FIG. 7 is a schematic diagram of a rotor structure in an embodiment of the present utility model;
FIG. 8 is a cross-sectional view of a rotor in one embodiment of the utility model;
FIG. 9 is a schematic diagram of a moving contact according to an embodiment of the present utility model;
FIG. 10 is a schematic view of a base structure according to an embodiment of the present utility model;
in the figure, an operating handle-1, a rocker arm-2, a side plate support arm-201, a middle connecting plate-202, a spring mounting through hole-203, a pin shaft limiting groove-204, a jump fastener-3, an upper connecting rod-4, a lower connecting rod-5, a rotating shaft-6, a moving contact mounting groove-601, a first limiting wall-602, a second limiting wall-603, a first pin shaft through hole-604, a first U-shaped connecting groove-605, a cylindrical hinging column-606, a moving contact-7, a third limiting wall-701, a fourth limiting wall-702, a second pin shaft through hole-703, a connecting part-704, an energy storage spring-8, a mounting rack-9, a bracket piece-901, a groove-902, an inner limiting rib-903, an outer limiting rib-904, a mounting plate-905, a limiting pin shaft-10, a connecting pin shaft-11, a base-12, a mounting seat-1201 and a second U-shaped connecting groove-1202 are arranged.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.
It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.
The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.
1-3, the operating mechanism of the plastic shell type breaker comprises an operating handle 1, a rocker arm 2, a jump fastener 3, an upper connecting rod 4, a lower connecting rod 5, a rotating shaft 6, a moving contact 7 and an energy storage spring 8, wherein the rocker arm 2 can rotate around a point G, the operating handle 1 and the rocker arm 2 are in linkage fit for operating the rocker arm 2 to rotate, the jump fastener 3 is hinged with the upper connecting rod 4 on an axis A, the upper connecting rod 4 is hinged with the lower connecting rod 5 on an axis B, the lower connecting rod 5 is hinged with the rotating shaft 6 on an axis C, the rotating shaft 6 can rotate around a point O, the energy storage spring 8 is connected between the rocker arm 2 and the axis B, and the moving contact 7 is fixed on the rotating shaft 6; the operating mechanism is provided with an energy storage state and an energy release state, the position of the jump fastener 3 is fixed in the energy storage state, the energy storage spring 8 is stretched to store energy, the operating handle 1 can drive the movable contact 7 to rotate between opening and closing positions, the jump fastener 3 can rotate around a T point in the energy release state, and the movable contact 7 rotates from the closing position to the opening position under the energy release shrinkage effect of the energy storage spring 8; the rotating angle between the opening and closing positions of the moving contact 7 is 75-145 degrees. As shown in fig. 4, the upper link 4, the lower link 5 and the rotating shaft 6 form a four-link structure of "AB-BC-CO-OA", when the rocker arm 2 moves from the S point to the S 'point, the shaft B moves to the B' point under the pull of the energy storage spring 8, the upper link 4, the lower link 5 and the rotating shaft 6 are switched into a four-link structure of "AB '-B' C '-C' O-OA", the rotating shaft 6 rotates in the process, and the moving contact 7 is fixed on the rotating shaft 6 and moves along with the rotating shaft.
In order to improve the design speed, the embodiment provides a method capable of rapidly estimating the opening of a moving contact, specifically according to an estimation formula: beta is equal to alpha (AB+BC)/OC (AB/BC) 0.46, wherein beta is the rotation angle between the opening and closing positions of the moving contact, alpha is the rotation angle of the upper connecting rod, AB is the length between two hinge points of the upper connecting rod, BC is the length between two hinge points of the lower connecting rod, and OC is the rotating shaft force arm. The formula is verified on a moving contact product which is already mature in the market, and the estimation error is within 10%; taking the product a as an example, AB is 32mm, bc is 33mm, oc is 27mm, α is 37 °, β is about 37 x (32+33)/27 x (32/33) 0.46=40, and the moving contact angle β of the actual product is 40 °.
According to the above estimation formula, β is approximately 54 (33+32.5)/16 (33/32.5) and 0.46=103, and the rotation angle β between the opening and closing positions of the moving contact of the actual product is 104.5 °.
The rocker arm 2 is limited on the mounting frame 9 to enable the rocker arm 2 to rotate around a G point relative to the mounting frame 9, and the jump fastener 3 is hinged with the mounting frame 9 through a T shaft.
As shown in fig. 5, the rocker arm 2 is provided with two side plate support arms 201 and an intermediate connection plate 202, the bottom of the side plate support arms 201 is a cylindrical curved surface, and the intermediate connection plate 202 is connected with the operating handle 1 and the energy storage spring 8; as shown in fig. 6, the mounting rack 9 is composed of two bracket members 901 and a plurality of shafts connected between the two bracket members 901, one side plate support arm 201 is matched with one bracket member 901, a groove 902 with a cylindrical concave surface is arranged on the bracket member 901 corresponding to the bottom of the side plate support arm 201, an inner limit rib 903 and an outer limit rib 904 are arranged on two sides of the corresponding side plate support arm 201, the side plate support arm 201 passes through the space between the inner limit rib 903 and the outer limit rib 904, and the bottom of the side plate support arm 201 is supported in the groove 902 with the cylindrical concave surface. In the installation, the side plate support arm 201 is directly inserted between the inner limit rib 903 and the outer limit rib 904.
As shown in fig. 5, the middle connecting plate 202 is provided with a spring installation through hole 203, the upper surface of the middle connecting plate 202 is provided with pin shaft limiting grooves 204 at two sides of the spring installation through hole 203, the energy storage spring 8 extends into the spring installation through hole 203 and is connected with a limiting pin shaft 10, and the limiting pin shaft 10 is arranged in the pin shaft limiting grooves 204. The energy storage spring 8 is installed simply and conveniently.
As shown in fig. 6, a mounting plate 905 having a through hole is provided at the bottom of the bracket 901.
As shown in fig. 7 and 8, a moving contact mounting groove 601 is provided in the rotating shaft 6, one end of the moving contact 7 is fixedly provided in the moving contact mounting groove 601 to form a fit with the rotating shaft 6, and the other end of the moving contact 7 extends out of the moving contact mounting groove 601 for opening and closing. By the arrangement, the outer diameter of the rotating shaft 6 can be increased, the moment of the rotating shaft 6 can be correspondingly increased, and meanwhile, the moment of the moving contact 7 is reduced, so that the purpose of saving labor is achieved.
As shown in fig. 8, the section of the moving contact mounting groove 601 is L-shaped, and an opening for mounting the moving contact 7 is formed on the outer wall of the rotating shaft 6, the inner wall of the moving contact mounting groove 601 is provided with a first limiting wall 602 and a second limiting wall 603, as shown in fig. 9, the rotating shaft 6 is provided with a first pin shaft through hole 604 penetrating through, one end of the moving contact 7 in the moving contact mounting groove 601 is L-shaped, the moving contact is provided with a third limiting wall 701 and a fourth limiting wall 702 which are respectively in limiting fit with the first limiting wall 602 and the second limiting wall 603, and a second pin shaft through hole 703 which is concentrically arranged corresponding to the first pin shaft through hole 604, the moving contact 7 is connected with the rotating shaft 6 through a connecting pin 11 penetrating through the first pin shaft through hole 604 and the second pin shaft through hole 703, and the first limiting wall 602 and the second limiting wall 603 are matched, and the fourth limiting wall 702 are matched to respectively form rotation in two directions of the rotating shaft 6, so that the moving contact 7 is driven to rotate. The movable contact 7 is easy to install.
Further, the central axis of the connecting pin 11 is located at the O-point, a connecting portion 704 for connecting the flexible connection wire is disposed at one end of the moving contact 7 located in the moving contact mounting groove 601, and an opening for the flexible connection wire to pass through is disposed on the outer wall of the rotating shaft 6 and in the corresponding connecting portion 704 between the moving contact 7. In this way, the fixed end of the flexible connecting wire is closer to the O point of the rotation center, and the moving amount of the fixed end of the flexible connecting wire is smaller in the rotating process of the moving contact, so that the flexible connecting wire can be free from being excessively long, and the housing is free from being provided with excessive space for the flexible connecting wire to move.
The breaker provided with the embodiment is provided with a base 12 as shown in fig. 10, two ends of a rotating shaft 6 are protruded to form a cylindrical hinge post 606, a second U-shaped connecting groove 1202 for the cylindrical hinge post 604 to be inserted into from top to bottom to form a hinge fit is arranged in the base 12, and the rotating shaft 6 is directly arranged on the base 12 to rotate around an O point relative to the base 12; the base 12 is provided with a mounting seat 1201 matched with the mounting plate 905, and the mounting frame 9 is directly mounted and fixed on the base 12 through screws; as shown in fig. 7, a first U-shaped connecting groove 605 for the C-axis to be inserted from top to bottom to form a hinged fit is provided on the outer wall of the rotating shaft 6, and the installation process is simple.
The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.
Claims (9)
1. A plastic case type circuit breaker operating mechanism, characterized in that: the intelligent control device comprises an operating handle (1), a rocker arm (2), a jump fastener (3), an upper connecting rod (4), a lower connecting rod (5), a rotating shaft (6), a moving contact (7) and an energy storage spring (8), wherein the rocker arm (2) can rotate around a G point, the operating handle (1) and the rocker arm (2) are in linkage fit and are used for operating the rocker arm (2) to rotate, the jump fastener (3) is hinged with the upper connecting rod (4) on an A shaft, the upper connecting rod (4) is hinged with the lower connecting rod (5) on a B shaft, the lower connecting rod (5) is hinged with the rotating shaft (6) on a C shaft, the rotating shaft (6) can rotate around an O point, the energy storage spring (8) is connected between the rocker arm (2) and the B shaft, and the moving contact (7) is fixed on the rotating shaft (6); the operating mechanism is provided with an energy storage state and an energy release state, the position of the jump fastener (3) is fixed in the energy storage state, the energy storage spring (8) is stretched to store energy, the operating handle (1) can drive the movable contact (7) to rotate between opening and closing positions, the jump fastener (3) can rotate around a T point in the energy release state, and the movable contact (7) rotates from the closing position to the opening position under the energy release shrinkage action of the energy storage spring (8); the rotating angle between the opening and closing positions of the moving contact (7) is 75-145 degrees.
2. The plastic case circuit breaker operating mechanism of claim 1, wherein: the length AB between two hinge points of the upper connecting rod and the length BC between two hinge points of the lower connecting rod and the rotating shaft force arm OC=33:32.5:16, the rotating angle alpha of the upper connecting rod=54°, and the rotating angle between the opening and closing positions of the moving contact is 104.5 °.
3. The plastic case circuit breaker operating mechanism of claim 1, wherein: the rocker arm is characterized by further comprising an installation frame (9), the rocker arm (2) is limited on the installation frame (9) to enable the rocker arm to rotate around a G point relative to the installation frame (9), and the jump fastener (3) is hinged with the installation frame (9) through a T shaft.
4. A plastic case circuit breaker operating mechanism according to claim 3, wherein: the rocker arm (2) is provided with two side plate support arms (201) and an intermediate connecting plate (202), the bottoms of the side plate support arms (201) are cylindrical curved surfaces, and the intermediate connecting plate (202) is connected with the operating handle (1) and the energy storage spring (8); the mounting rack (9) is composed of two support pieces (901) and a plurality of shafts connected between the two support pieces (901), one side plate support arm (201) is matched with one support piece (901), grooves (902) with cylindrical concave surfaces are formed in the bottoms of the support pieces (901) corresponding to the side plate support arms (201), inner limit ribs (903) and outer limit ribs (904) are arranged on two sides of the side plate support arms (201) corresponding to the side plate support arms, and the side plate support arms (201) penetrate through the positions between the inner limit ribs (903) and the outer limit ribs (904) and are supported in the grooves (902) with the cylindrical concave surfaces at the bottoms.
5. The plastic case circuit breaker operating mechanism of claim 4, wherein: the energy storage spring is characterized in that a spring installation through hole (203) is formed in the middle connecting plate (202), pin shaft limiting grooves (204) are formed in the two sides of the spring installation through hole (203) on the upper surface of the middle connecting plate (202), the energy storage spring (8) stretches into the spring installation through hole (203) and is connected with a limiting pin shaft (10), and the limiting pin shaft (10) is arranged in the pin shaft limiting grooves (204).
6. The plastic case circuit breaker operating mechanism of claim 4, wherein: a mounting plate (905) with a through hole is arranged at the bottom of the bracket piece (901).
7. The plastic case circuit breaker operating mechanism of claim 1, wherein: the movable contact is characterized in that a movable contact mounting groove (601) is formed in the rotating shaft (6), one end of the movable contact (7) is fixedly arranged in the movable contact mounting groove (601) to be matched with the rotating shaft (6), and the other end of the movable contact (7) extends out of the movable contact mounting groove (601) to be used for switching on and off.
8. The plastic case circuit breaker operating mechanism of claim 7, wherein: the movable contact mounting groove (601) is L-shaped in cross section and forms an opening for mounting the movable contact (7) on the outer wall of the rotating shaft (6), a first limiting wall (602) and a second limiting wall (603) are formed in the inner wall of the movable contact mounting groove (601), a first through pin shaft through hole (604) penetrating through the rotating shaft (6) is formed in the movable contact mounting groove (601), one end of the movable contact (7) located in the movable contact mounting groove is L-shaped, a third limiting wall (701) and a fourth limiting wall (702) which are in limiting fit with the first limiting wall (602) and the second limiting wall (603) respectively are arranged, and a second through pin shaft through hole (703) which corresponds to the first through pin shaft through hole (604) are formed in a concentric mode, the movable contact (7) is connected with the rotating shaft (6) through a connecting pin shaft (11), and the first limiting wall (602) and the third limiting wall (701) are matched with the second limiting wall (603) and the fourth limiting wall (702) are matched with the first limiting wall (602) and the fourth limiting wall (702) respectively to form two rotating shafts (6) which rotate in the two directions to drive the movable contact (7).
9. The plastic case circuit breaker operating mechanism of claim 8, wherein: the central shaft of the connecting pin shaft (11) is positioned at the O point, one end of the moving contact (7) positioned in the moving contact mounting groove (601) is provided with a connecting part (704) for connecting a soft connecting wire, and an opening for the soft connecting wire to pass through is formed in the outer wall of the rotating shaft (6) and the corresponding connecting part (704) between the moving contact (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321740298.0U CN220065599U (en) | 2023-07-04 | 2023-07-04 | Plastic case type breaker operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321740298.0U CN220065599U (en) | 2023-07-04 | 2023-07-04 | Plastic case type breaker operating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220065599U true CN220065599U (en) | 2023-11-21 |
Family
ID=88786226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321740298.0U Active CN220065599U (en) | 2023-07-04 | 2023-07-04 | Plastic case type breaker operating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220065599U (en) |
-
2023
- 2023-07-04 CN CN202321740298.0U patent/CN220065599U/en active Active
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