CN108081179B - Assembly fixture and assembly method for moving contact system of frame-type circuit breaker - Google Patents
Assembly fixture and assembly method for moving contact system of frame-type circuit breaker Download PDFInfo
- Publication number
- CN108081179B CN108081179B CN201810017259.5A CN201810017259A CN108081179B CN 108081179 B CN108081179 B CN 108081179B CN 201810017259 A CN201810017259 A CN 201810017259A CN 108081179 B CN108081179 B CN 108081179B
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- plate
- moving contact
- guide rod
- contact system
- positioning plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/02—Assembly jigs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
- H01H69/02—Manufacture of fuses
Abstract
The invention relates to an assembly fixture and an assembly method of a moving contact system of a frame-type circuit breaker, wherein the fixture comprises: the base is provided with a front positioning plate (402) in front of the top surface, a rear positioning plate (403) in back, a limit plate (602) is arranged on one side of the rear positioning plate, and a nut (7) is welded on the other side of the rear positioning plate; the limiting plate is provided with a stepped vertical hole with a small upper part and a large lower part, a convex ring is arranged between the transition of the big hole and the small hole, and the side surface of the vertical hole is provided with a notch; a pressing mechanism comprising: the bottom end of one guide rod (5) is rotatably supported in the base welding nut (7), the bottom end of the other guide rod (601) is provided with an annular convex rib, the other guide rod (601) can enter and exit from a side gap of a vertical hole of a limiting plate of the base, and the annular convex rib can be clamped below the middle convex ring; the top ends of the two guide rods are connected through a positioning plate (201), and a guide plate (301) capable of moving up and down is arranged in the middle; a linear motion mechanism is arranged between the positioning plate and the guide plate, and a pressing plate is arranged on the bottom surface of the guide plate.
Description
Technical Field
The invention relates to an assembly fixture of a moving contact system of a frame-type circuit breaker. The invention also relates to a method for assembling the moving contact system of the frame-type circuit breaker by using the clamp.
Background
The assembly fixture structure of the prior frame-type breaker moving contact system generally adopts the structural design of a positioning platform, a fixed bracket and a driving rod pressurizing plate. Some of the assembly clamps and the assembly methods thereof are only suitable for the situations of less contact blades and smaller contact pressure, but are not suitable for the situations of more moving contact blades and large contact pressure. And when the movable contact is put into the positioning platform, the pressing plate needs to be withdrawn a large distance, and the operation is time-consuming and labor-consuming.
Some driving devices of the assembly clamps adopt pneumatic devices and guide rods with adjusting nuts, so that the problem that operation is time-consuming and labor-consuming is solved, but brackets of the assembly clamps cannot move, and structural limitation is great. Because the space is limited due to the structural characteristics, the moving contact pressure spring is difficult to adjust. The device is not suitable for the situation that the position of a moving contact pressure spring needs to be adjusted after the moving contact system is put into a positioning platform. For some contact supports without raised partition plates, the structure is very compact, and after the movable contact system is installed, the position of the pressure spring of the movable contact is difficult to conveniently adjust due to space limitation, and the movable contact system is usually required to be removed and reinstalled once. This greatly increases the efficiency and quality of the conversion.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide an assembly fixture of a frame-type circuit breaker moving contact system.
The second technical problem to be solved by the invention is to provide a method for assembling a moving contact system of a frame-type circuit breaker by using the clamp.
By using the assembly fixture and the assembly method, the assembly process is simple, the assembly time is short, and the reliability and the stability of the fixture are improved.
The first technical problem is solved, and the technical scheme adopted by the invention is as follows:
an assembly fixture for a moving contact system of a frame-type circuit breaker, which is characterized by comprising:
the base is provided with a top plane, the front of the top plane is provided with a front positioning plate 402, the rear of the top plane is provided with a rear positioning plate 403, one side of the rear positioning plate 403 is provided with a limiting plate 602, and the other side of the rear positioning plate 403 is provided with a threaded hole or welded with a nut 7; the design of the front and rear positioning plates corresponds to the structure of the frame type breaker moving contact system to be installed and can be placed on the front and rear positioning plates; the limiting plate 602 is provided with a stepped vertical hole with a small upper part and a large lower part, a convex ring is arranged between the excessive large hole and the excessive small hole, and a notch is arranged on the side surface of the vertical hole;
a pressing mechanism comprising: the bottom end of one guide rod 5 (I-shaped guide rod) is rotatably supported in a threaded hole or a welding nut 7 of the base, the bottom end of the other guide rod 601 (T-shaped guide rod) is provided with an annular convex rib, the other guide rod 601 can enter and exit the vertical hole from a side gap of the vertical hole of the limiting plate 602 of the base, and the annular convex rib can be clamped below a middle convex ring of the vertical hole; the top ends of the two guide rods are connected through a positioning plate 201, and a guide plate 301 capable of moving up and down is arranged in the middle; a screw and nut linear motion mechanism is arranged between the positioning plate 201 and the guide plate 301, and a pressing plate corresponding to the frame type circuit breaker moving contact system is arranged on the bottom surface of the guide plate 301.
The screw nut linear motion mechanism is specifically: the top surface of the guide plate 301 is fixed with a screw nut linear motion mechanism nut, a hole is formed in the middle of the positioning plate 201, a screw rod of the screw nut linear motion mechanism can rotate but cannot be supported up and down, and a handle 1 is arranged at the top end of the screw rod penetrating out of the upper part of the middle hole of the positioning plate 201.
The lower part of the other guide rod 601 is sleeved with a circular sleeve 603, the outer diameter of the circular sleeve corresponds to the small hole above the stepped vertical hole with the small upper part and the large lower part of the limiting plate 602, and the T-shaped guide rod can be locked through the matching of the circular sleeve and the annular convex edges with the limiting plate.
The bottom surface of the pressing plate 302 is provided with a groove, so that the moving contact silver point of the moving contact system can be avoided during downward movement, and the moving contact silver point cannot be damaged.
The second technical problem is solved, and the technical scheme adopted by the invention is as follows:
the method for assembling the moving contact system of the frame-type circuit breaker by using the clamp is characterized by comprising the following steps of:
1) The T-shaped guide rod is separated from the limiting plate and is in an unlocked state before installation begins;
2) Placing the contact support with the previous procedure on the front positioning plate 402 and the rear positioning plate 403, then installing a moving contact pressure spring and a moving contact system, and manually adjusting to enable the moving contact pressure spring and the moving contact system to be positioned at the expected position;
3) Moving the annular sleeve of the T-shaped guide rod upwards until contacting the guide plate; then the central shaft of the I-shaped guide rod is used for rotating the linear reciprocating device, so that the T-shaped guide rod (rotating to the limiting plate, then putting down the circular sleeve, and the circular sleeve is clamped in the groove of the limiting plate due to the action of gravity, and the T-shaped guide rod is rapidly clamped;
4) The handle moves circularly around the central shaft of the threaded sleeve, the pressurizing mechanism is driven to move, and the pressing plate presses the movable contact system to move downwards, so that the side plate and the shaft of the movable contact system can be conveniently, quickly and reliably installed later;
5) After other parts of the movable contact system are installed, the handle moves circularly around the central shaft of the threaded sleeve, and the pressurizing mechanism is driven to move, so that the pressing plate moves upwards; after the pressing plate leaves the movable contact system, the circular sleeve is enabled to move upwards and separate from the groove of the limiting plate, so that the T-shaped guide rod is in an unlocked state; and then the central shaft of the I-shaped guide rod rotates the linear reciprocating device for a certain angle, and the mounted movable contact system is taken out.
The beneficial effects are that: the assembly fixture of the frame-type circuit breaker moving contact system adopts a reliable pressurizing mechanism and a unique bracket locking and unlocking device, is suitable for the situation that the number of moving contact blades of the frame-type circuit breaker is compact in multiple rows and high in contact pressure, and particularly the position of a moving contact pressure spring is required to be manually adjusted after the moving contact system is placed on a positioning platform.
The assembly fixture of the frame-type circuit breaker moving contact system has the advantages of simple assembly process and short assembly time, improves the assembly efficiency and the assembly quality of products, and improves the use reliability and stability of the fixture.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic view of the structure and connection of the present invention (T-shaped guide bar locked state);
FIG. 2 is a schematic illustration of the T-bar of FIG. 1 in an unlocked state;
FIG. 3 is a schematic view of the working state of the present invention;
FIG. 4 is a schematic perspective view of a limiting plate structure according to the present invention;
FIG. 5 is a schematic view of a contact support structure;
FIG. 6 is a schematic diagram of a moving contact system;
fig. 7 is an enlarged partial schematic view of fig. 6.
Reference numerals in the drawings refer to: 1-handle, 201-locating plate, 202-fastener, 301-guide plate, 302-pressing plate, 303-threaded sleeve, 401-bottom plate, 402-front locating plate, 403-rear locating plate, 5-I type guide rod, 601-T type guide rod, 602-limit plate, 603-circular sleeve, 7-nut, 8-contact support, 801-contact support cylinder slot, 9-moving contact system, 901-moving contact silver point, 10-moving contact pressure spring.
Detailed Description
Referring to fig. 1 and 2, an assembly fixture embodiment of a frame-type circuit breaker moving contact system of the present invention comprises:
a rectangular plate base 401, the front of the top plane is fixed with a front positioning plate 402, the rear is fixed with a rear positioning plate 403, one side of the rear positioning plate 403 is fixed with a limiting plate 602, and the other side is welded with a nut 7.
Referring to fig. 3, the front and rear positioning plates should be designed to correspond to the structure of the frame type circuit breaker moving contact system to be installed and can be placed on the front and rear positioning plates.
Referring to fig. 4, the limiting plate 602 is provided with stepped vertical holes with small upper parts and large lower parts, convex rings are arranged between the excessive large holes and the excessive small holes, and the lateral surfaces of the vertical holes are provided with notches.
Still another pressurizing mechanism includes: two guide bars 5 and 601. The bottom end of the guide rod 5 (I-shaped guide rod) is threaded, and is screwed into the nut 7 of the base 401, and the bottom end of the other guide rod 601 (T-shaped guide rod) is provided with an annular rib (see fig. 2). The other guide rod 601 can enter and exit the vertical hole from the side notch of the vertical hole of the limiting plate 602 of the base 401, and the annular convex rib can be clamped under the middle convex ring of the vertical hole. The lower part of the guide rod 601 is slidably sleeved with a circular sleeve 603, the outer diameter of the circular sleeve corresponds to the small hole above the stepped vertical hole with the small upper part and the large lower part of the limiting plate 602, and the T-shaped guide rod can be locked through the cooperation of the circular sleeve and the circular convex edges with the limiting plate.
The top ends of the two guide rods are provided with threads and then are connected through a positioning plate 201 (the positioning plate 201 is provided with a vertical hole which is connected through a screw cap after passing through), and a guide plate 301 which can move up and down along the two guide rods is arranged in the middle (the guide plate 301 is provided with two vertical holes which are in sliding fit with the two guide rods); a screw and nut linear motion mechanism is arranged between the positioning plate 201 and the guide plate 301, and a pressing plate corresponding to the frame type circuit breaker moving contact system is arranged on the bottom surface of the guide plate 301.
The screw nut linear motion mechanism arranged between the positioning plate 201 and the guide plate 301 is specifically as follows: the screw sleeve 303 of the screw nut linear motion mechanism is fixed on the top surface of the guide plate 301, a screw rod which can rotate but can not support the screw nut linear motion mechanism up and down is arranged in the middle of the positioning plate 201, and a handle 1 is arranged at the top end of the screw rod penetrating out of the upper part of the middle hole of the positioning plate 201.
The bottom surface of the pressing plate 302 is provided with a groove position, so that the moving contact silver point of the moving contact system can be avoided during downward movement, and the moving contact silver point cannot be damaged.
The assembling method for the moving contact system of the frame-type circuit breaker by using the clamp comprises the following steps:
1) The T-shaped guide rod is separated from the limiting plate and is in an unlocked state before installation begins;
2) Placing the contact support with the previous procedure on the front positioning plate 402 and the rear positioning plate 403, then installing a moving contact pressure spring and a moving contact system, and manually adjusting to enable the moving contact pressure spring and the moving contact system to be positioned at the expected position;
3) Moving the annular sleeve of the T-shaped guide rod upwards until contacting the guide plate; then the central shaft of the I-shaped guide rod is used for rotating the linear reciprocating device, so that the T-shaped guide rod (rotating to the limiting plate, then putting down the circular sleeve, and the circular sleeve is clamped in the groove of the limiting plate due to the action of gravity, and the T-shaped guide rod is rapidly clamped;
4) The handle moves circularly around the central shaft of the threaded sleeve, the pressurizing mechanism is driven to move, and the pressing plate presses the movable contact system to move downwards, so that the side plate and the shaft of the movable contact system can be conveniently, quickly and reliably installed later;
5) After other parts of the movable contact system are installed, the handle moves circularly around the central shaft of the threaded sleeve, and the pressurizing mechanism is driven to move, so that the pressing plate moves upwards; after the pressing plate leaves the movable contact system, the circular sleeve is enabled to move upwards and separate from the groove of the limiting plate, so that the T-shaped guide rod is in an unlocked state; and then the central shaft of the I-shaped guide rod rotates the linear reciprocating device for a certain angle, and the mounted movable contact system is taken out.
Fig. 1 is a schematic structural view of an assembly fixture for a moving contact system of a frame-type circuit breaker in a locked state of a T-shaped guide bar, and fig. 2 is a schematic structural view of an assembly fixture for a moving contact system of a frame-type circuit breaker in an unlocked state of a T-shaped guide bar. As can be seen from fig. 1 and 2, the assembly fixture for the moving contact system of the frame-type circuit breaker comprises a fixed seat, a pressing mechanism, a pressing plate 302 and a bracket locking and unlocking device.
The fixing seat comprises a bottom plate 401, a front positioning plate 402 and a rear positioning plate 403; the pressurizing mechanism comprises a handle 1, a positioning plate 201, an I-shaped guide rod 5, a guide plate 301 and a threaded sleeve 303; the bracket locking and unlocking device comprises a T-shaped guide rod 601, a circular sleeve 603 and a limiting plate 602.
A front positioning plate 402, a rear positioning plate 403 and a limiting plate 602 are fixed above the bottom plate 401. One end of the I-shaped guide rod 5 is fixed on the bottom plate 401 through a fastener 7, and the other end is fixed on the positioning plate 201 through a fastener 202. One end of the T-shaped guide bar 601 is fixed to the positioning plate 201 by the fastener 202. The handle 1 is arranged in the middle of the positioning plate 201, and the threaded rotating shaft of the handle is connected with the lower threaded sleeve 303; the threaded sleeve 303 is fixed on the guide plate 301, the pressing plate 302 is fixed below the guide plate 301, the pressing plate 302 is provided with a groove, and the moving contact silver point 901 of the moving contact system 9 is avoided when the pressing plate moves downwards, so that the moving contact silver point 901 is not damaged; the I-shaped guide bar 5 and the T-shaped guide bar 601 pass through the guide plate 301. The threaded sleeve 303 is positioned below the guide plate 301 and fits over the T-shaped guide bar 601. The guide plate 301, the screw bushing 303 and the pressing plate 302 constitute one unit, and reciprocate in the direction of the central axis of the guide rod by the circular motion of the handle. The pressurizing mechanism can rotate by a certain angle with the central shaft of the I-shaped guide rod 5, and when the T-shaped guide rod 601 moves to the limiting plate 602, the T-shaped guide rod 601 can be locked by moving the annular sleeve 603 to be matched with the limiting plate 602.
Fig. 3 is a schematic view of an assembly fixture for a moving contact system of a frame-type circuit breaker according to the present invention in an operating state, and a method for assembling using the assembly fixture includes:
the t-shaped guide bar 601 is in an unlocked state before installation begins.
2. The contact support 8 after the previous process is placed on the front positioning plate 402 and the rear positioning plate 403, and then the moving contact pressure spring 10 and the moving contact system 9 are installed to perform manual adjustment, so that the moving contact pressure spring 10 and the moving contact system 9 are positioned at the expected positions.
3 move the annular sleeve 603 upward until it contacts the guide plate 301. Then, the straight reciprocating device is rotated by the central axis of the I-shaped guide rod 5, the T-shaped guide rod 601 is rotated to the limit plate 602, and then the annular sleeve 603 is put down. The annular sleeve 603 is clamped in the groove of the limiting plate 602 due to the action of gravity. The T-shaped guide bar 601 is rapidly clamped.
4, the handle moves circularly around the central shaft of the threaded sleeve 303, and the pressurizing mechanism is driven to move, so that the pressing plate presses the movable contact system to move downwards, thereby facilitating the subsequent rapid and reliable installation of the side plate and the shaft.
5, after the other parts of the moving contact system are installed, the handle moves circularly around the central shaft of the threaded sleeve 303, and the pressurizing mechanism is driven to move, so that the pressing plate 302 moves upwards. After the pressing plate is separated from 302 to start the contact system, the annular sleeve 603 is moved upwards to be separated from the groove of the limiting plate 602, so that the T-shaped guide rod 601 is in an unlocked state. And then the linear reciprocating device is rotated by a certain angle by the central shaft of the I-shaped guide rod 5, and the mounted movable contact system is taken out.
Fig. 4 is a schematic structural view of a limiting plate 602 in an assembly fixture for a frame-type circuit breaker moving contact system according to the present invention. The part is characterized by comprising three layers of slots, wherein the uppermost layer is a clamping slot of a circular sleeve 603, the middle layer is a cylinder slot of a T-shaped guide rod 601, and the lowermost layer is a circular disc slot at the end part of the T-shaped guide rod 601. The T-shaped guide rod 601, the annular sleeve 603 and the limiting plate 602 form a set of quick locking and unlocking device.
Fig. 5 is a schematic view of a contact support structure. The contact support 8 has no protruding partition between the contact support cylindrical slots 801, and is very compact in structure. After the movable contact system is installed, the position of the movable contact pressure spring 10 is difficult to adjust conveniently due to space limitation. Typically, it is required to be removed and reinstalled once.
Fig. 6 is a schematic structural diagram of a moving contact system, and because of the compact structural design, the limit of the other end of the moving contact pressure spring 10 adopts a clamping sleeve type structure, that is, one side of the moving contact system, which is close to the moving contact pressure spring 10, is provided with a boss smaller than the inner diameter of the moving contact pressure spring 10, and the boss can be sleeved in the moving contact pressure spring 10. With this structure, if the movable contact system is improperly installed, the end of the movable contact pressure spring 10 away from the contact support 8 is easily separated from the expected position.
The assembly fixture for the moving contact system of the frame-type circuit breaker adopts a reliable pressurizing mechanism and a unique bracket locking and unlocking device, is suitable for the situation that the moving contact blades of the frame-type circuit breaker are closely arranged in a plurality of rows and have high contact pressure, and particularly, the position of a moving contact pressure spring is required to be manually adjusted after the moving contact system is placed on a positioning platform. The assembly fixture for the moving contact system of the frame-type circuit breaker has the advantages of simple assembly process and short assembly time, improves the assembly efficiency and the assembly quality of products, and improves the use reliability and stability of the fixture.
Claims (4)
1. The method for assembling the moving contact system of the frame-type circuit breaker by using the assembling clamp is characterized by comprising the following steps of:
1) The T-shaped guide rod is separated from the limiting plate and is in an unlocked state before installation begins;
2) Placing the contact support with the previous procedure on a front positioning plate (402) and a rear positioning plate (403), and then installing a moving contact pressure spring and a moving contact system for manual adjustment to enable the moving contact pressure spring and the moving contact system to be positioned at the expected positions;
3) Moving the annular sleeve of the T-shaped guide rod (5) upwards until contacting the guide plate; then the central shaft of the I-shaped guide rod rotates the linear reciprocating device, so that the T-shaped guide rod (601) rotates into the vertical hole of the limiting plate, then the annular sleeve is put down and clamped in the groove of the limiting plate due to the action of gravity, and the T-shaped guide rod is rapidly clamped;
4) The handle moves circularly around the central shaft of the threaded sleeve, the pressurizing mechanism is driven to move, and the pressing plate presses the movable contact system to move downwards, so that the side plate and the shaft of the movable contact system can be conveniently, quickly and reliably installed later;
5) After other parts of the movable contact system are installed, the handle moves circularly around the central shaft of the threaded sleeve, and the pressurizing mechanism is driven to move, so that the pressing plate moves upwards; after the pressing plate leaves the movable contact system, the circular sleeve is enabled to move upwards and separate from the groove of the limiting plate, so that the T-shaped guide rod is in an unlocked state; then the central shaft of the I-shaped guide rod rotates the linear reciprocating device for a certain angle, and the installed moving contact system is taken out;
the assembly fixture used in the assembly method comprises the following steps:
the base is provided with a top plane, the front surface of the top plane is provided with a front positioning plate (402), the rear surface of the top plane is provided with a rear positioning plate (403), one side of the rear positioning plate is provided with a limiting plate (602), and the other side of the rear positioning plate is provided with a threaded hole or welded with a nut (7); the design of the front and rear positioning plates corresponds to the structure of the frame type breaker moving contact system to be installed and can be placed on the front and rear positioning plates; the limiting plate is provided with a stepped vertical hole with a small upper part and a large lower part, a convex ring is arranged between the excessive large hole and the excessive small hole, and the side surface of the vertical hole is provided with a notch;
a pressing mechanism comprising: the bottom end of one guide rod (5) is rotatably supported in a threaded hole or a welding nut (7) of the base, an annular convex rib is arranged at the bottom end of the other guide rod (601), the other guide rod (601) can enter and exit the vertical hole from a side gap of a vertical hole of a limiting plate of the base, and the annular convex rib can be clamped below a middle convex ring of the vertical hole; the top ends of the two guide rods are connected through a positioning plate (201), and a guide plate (301) capable of moving up and down is arranged in the middle; a screw nut linear motion mechanism is arranged between the positioning plate and the guide plate, and a pressing plate corresponding to the frame-type breaker moving contact system is arranged on the bottom surface of the guide plate.
2. The method of assembly of claim 1, wherein: the screw nut linear motion mechanism arranged between the positioning plate (201) and the guide plate (301) of the assembly fixture is as follows: the top surface of the guide plate is fixed with a screw nut linear motion mechanism, a hole is formed in the middle of the positioning plate, a screw of the screw nut linear motion mechanism can be rotated but cannot be supported up and down, and a handle (1) is arranged at the top end of the screw penetrating out of the upper part of the middle hole of the positioning plate.
3. The method of assembly of claim 2, wherein: the lower part of the other guide rod (601) of the assembly fixture is sleeved with a circular sleeve (603), and the outer diameter of the circular sleeve corresponds to the small upper hole of the stepped vertical hole with the small upper part and the large lower part of the limiting plate (602).
4. A method of assembling as claimed in claim 3, wherein: the bottom surface of the pressing plate (302) of the assembly fixture is provided with a groove, so that the moving contact silver point of the moving contact system can be avoided when the assembly fixture moves downwards, and the moving contact silver point cannot be damaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017259.5A CN108081179B (en) | 2018-01-09 | 2018-01-09 | Assembly fixture and assembly method for moving contact system of frame-type circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017259.5A CN108081179B (en) | 2018-01-09 | 2018-01-09 | Assembly fixture and assembly method for moving contact system of frame-type circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN108081179A CN108081179A (en) | 2018-05-29 |
| CN108081179B true CN108081179B (en) | 2023-09-19 |
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| CN201810017259.5A Active CN108081179B (en) | 2018-01-09 | 2018-01-09 | Assembly fixture and assembly method for moving contact system of frame-type circuit breaker |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110310852B (en) * | 2019-06-14 | 2021-02-23 | 平高集团有限公司 | Assembly process and assembly tool for arc extinguish chamber contact pressure spring |
| CN110364397B (en) * | 2019-08-14 | 2024-03-29 | 环宇高科有限公司 | Moving contact assembly fixture |
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| CN205881795U (en) * | 2016-07-18 | 2017-01-11 | 江苏明及电气股份有限公司 | Vacuum circuit breaker |
| CN106847637A (en) * | 2017-03-08 | 2017-06-13 | 乐清市正雁电器有限公司 | frame-type circuit breaker |
| CN106926195A (en) * | 2017-04-17 | 2017-07-07 | 北海银河开关设备有限公司 | A kind of Medium voltage switch or circuit breaker contact stage clip assembly tooling |
| CN207953676U (en) * | 2018-01-09 | 2018-10-12 | 广州白云电器设备股份有限公司 | A kind of assembling jig of frame-type circuit breaker movable contact system |
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|---|---|
| CN108081179A (en) | 2018-05-29 |
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