CN105405712B - A kind of transmission mechanism of breaker and transmission case and transmission case - Google Patents

Abstract

The invention relates to a circuit breaker, a transmission box and a transmission mechanism of the transmission box. The circuit breaker includes a gearbox. The transmission box includes a box body and a transmission mechanism. The transmission mechanism includes the upper and lower contact rods and the insulating rods that drive the upper and lower contact rods to move up and down by moving left and right, and also includes an upper connecting plate and a lower connecting plate. The upper and lower connecting plates are hinged to the insulating rod through the first hinge shaft The upper connecting plate is hingedly connected with the upper contact rod through the second hinge shaft, and the lower connecting plate is hingedly connected with the lower contact rod through the third hinge shaft. The transmission mechanism also includes a fixed hinge shaft. Lower middle plate. During the synchronous movement of the upper and lower contact rods driven by the insulating rod, the impact load perpendicular to the movement direction of the upper and lower contact rods received by the guide structure of the upper and lower contact rods is fixed by the hinge shaft and the upper and lower middle plates. Sharing, which makes the guide structure less impact load, makes the guide structure not easy to damage, and also makes the transmission stability better.

Description

A circuit breaker, transmission box and transmission mechanism of the transmission box

technical field

The invention relates to a transmission mechanism of a circuit breaker, in particular to a circuit breaker, a transmission box and a transmission mechanism of the transmission box.

Background technique

The double-break circuit breaker includes two arc extinguishing chambers, and when the circuit breaker is switched off, the two arc extinguishing chambers act synchronously. The synchronicity of the closing and opening motions between the double breaks is the key to the design of the double breaks. If the synchronization of the opening and closing movement between the double fractures is poor, the circuit breaker will cause a significant difference in the arcing time of each fracture when breaking the current, which will cause the uneven voltage distribution of the fracture during the breaking process, which will not only make the contact of each contact The difference in electrical wear is large, and more importantly, it is easy to cause arc re-ignition or even breaking failure. Usually, the synchronous closing and opening of the two arc extinguishing chambers is realized by synchronously driving the moving contacts of the two arc extinguishing chambers through the transmission mechanism connected with the two arc extinguishing chambers.

For example, the authorized notification number is 204303672 U, and the name is a transmission mechanism for a double-break circuit breaker, which discloses a transmission mechanism. The transmission mechanism includes two sets of rods (equivalent to the upper contact rod and the lower contact rod), an insulating rod that drives the two telescopic rods to move left and right synchronously by moving up and down, and two crank arms (equivalent to the upper connecting plate and the lower connecting plate). plate), one end of the crank arm is pivotally connected to one end of the sleeve rod, and the other end is pivotally connected to the insulating pull rod. The up and down movement of the pull rod drives the two sets of rods to move left and right synchronously, so as to realize the synchronous closing and opening of the two arc extinguishing chambers. However, during the horizontal movement of the sleeve rod, the joint between the sleeve rod and the crank arm will be subjected to a large force perpendicular to the movement direction of the sleeve rod, and this force will act on the telescopic rod guided by the sleeve rod (equivalent to the guide structure ), that is, the guiding structure is subjected to impact loads, which makes the guiding structure easy to damage and affects the stability of the transmission.

Contents of the invention

The purpose of the present invention is to provide a transmission mechanism of the transmission box to solve the technical problem that the guide structure of the upper and lower contact rods in the transmission mechanism of the transmission box is easily damaged due to the impact load. The object of the present invention is also to provide a transmission box and a circuit breaker.

The technical scheme of the transmission mechanism of the transmission box of the present invention: a transmission mechanism of the transmission box, including the upper contact pull rod, the lower contact pull rod and the insulating pull rod that drives the upper and lower contact pull rods to move up and down by moving left and right, and also includes the upper contact pull rod The connecting plate and the lower connecting plate, the upper and lower connecting plates are hingedly connected with the insulating pull rod through the first hinge shaft, the upper connecting plate is hingedly connected with the upper contact rod through the second hinge shaft, and the lower connecting plate is connected with the lower contact rod through the third hinge shaft The head rods are hingedly connected, and the feature is that the transmission mechanism also includes a fixed hinge shaft. The upper middle plate and the lower middle plate are hinged on the fixed hinge shaft. The upper middle plate is hinged with the upper connecting plate through the fourth hinge shaft, and the lower middle plate passes through The fifth hinge shaft is hingedly connected with the lower connecting plate.

The distance from the first hinge axis to the fourth hinge axis is equal to the distance from the fourth hinge axis to the second hinge axis, and the distance from the first hinge axis to the fifth hinge axis is equal to the distance from the fifth hinge axis to the third hinge axis.

The technical scheme of the transmission box in the present invention: a transmission box, including a box body and a transmission mechanism, the transmission mechanism includes an upper contact pull rod, a lower contact pull rod, and an insulating pull rod that drives the upper and lower contact pull rods to move up and down by moving left and right, It also includes an upper connecting plate and a lower connecting plate, the upper and lower connecting plates are hingedly connected with the insulating pull rod through the first hinge shaft, the upper connecting plate is hingedly connected with the upper contact rod through the second hinge shaft, and the lower connecting plate is hinged through the third hinge shaft It is hingedly connected with the pull rod of the lower contact, and it is characterized in that: the transmission mechanism also includes a fixed hinge shaft, on which the upper middle plate and the lower middle plate are hinged, the upper middle plate is hingedly connected with the upper connecting plate through the fourth hinge shaft, and the lower The middle plate is hingedly connected with the lower connecting plate through the fifth hinge shaft.

The distance from the first hinge axis to the fourth hinge axis is equal to the distance from the fourth hinge axis to the second hinge axis, and the distance from the first hinge axis to the fifth hinge axis is equal to the distance from the fifth hinge axis to the third hinge axis.

The box body includes an upper bottom plate and a lower bottom plate oppositely arranged, a front side plate, a rear side plate and a left side plate oppositely arranged, and the left side plate is provided with a left perforation for insulating pull rods to pass through in the left and right direction , the upper base plate is provided with an upper perforation for the upper contact rod to pass through, and the lower base plate is provided with a lower perforation hole for the lower contact rod to pass through, and the front side plate and the rear side plate correspond to There are first guide slots for guiding the first hinge shaft extending in the left-right direction, second guide slots for guiding the second hinge shaft extending in the up-down direction, and lengths for guiding the third hinge shaft extending in the up-down direction. The third guide groove extending in the direction and the installation hole for fixing the hinge shaft installation.

The box body is made by casting, and the upper bottom plate, the lower bottom plate, the front side plate, the rear side plate and the left side plate form a cavity opening to the right.

The technical scheme of the circuit breaker in the present invention: a circuit breaker, including a transmission box, the transmission box includes a box body and a transmission mechanism, the transmission mechanism includes an upper contact pull rod and a lower contact pull rod, and the upper and lower contact pull rods are driven by moving left and right The insulating pull rod that moves up and down also includes an upper connecting plate and a lower connecting plate. The upper and lower connecting plates are hingedly connected with the insulating pull rod through the first hinge shaft, and the upper connecting plate is hingedly connected with the upper contact pull rod through the second hinge shaft. The plate is hingedly connected with the lower contact pull rod through the third hinge shaft. It is characterized in that: the transmission mechanism also includes a fixed hinge shaft, and the upper middle plate and the lower middle plate are hinged on the fixed hinge shaft. The connecting plates are hingedly connected, and the lower middle plate is hingedly connected with the lower connecting plate through the fifth hinge shaft.

The distance from the first hinge axis to the fourth hinge axis is equal to the distance from the fourth hinge axis to the second hinge axis, and the distance from the first hinge axis to the fifth hinge axis is equal to the distance from the fifth hinge axis to the third hinge axis.

The box body includes an upper bottom plate and a lower bottom plate oppositely arranged, a front side plate, a rear side plate and a left side plate oppositely arranged, and the left side plate is provided with a left perforation for insulating pull rods to pass through in the left and right direction , the upper base plate is provided with an upper perforation for the upper contact rod to pass through, and the lower base plate is provided with a lower perforation hole for the lower contact rod to pass through, and the front side plate and the rear side plate correspond to There are first guide slots for guiding the first hinge shaft extending in the left-right direction, second guide slots for guiding the second hinge shaft extending in the up-down direction, and lengths for guiding the third hinge shaft extending in the up-down direction. The third guide groove extending in the direction and the installation hole for fixing the hinge shaft installation.

The box body is made by casting, and the upper bottom plate, the lower bottom plate, the front side plate, the rear side plate and the left side plate form a cavity opening to the right.

The advantages of the present invention are: when the insulating pull rods moving left and right drive the upper and lower contact pull rods to move up and down synchronously, the guiding structure of the upper and lower contact pull rods is subjected to an impact perpendicular to the movement direction of the upper and lower contact pull rods The load is shared by the fixed hinge shaft and the upper and lower intermediate plates, which makes the guide structure less impact load, makes the guide structure not easy to be damaged, and improves the transmission stability.

Further, since the distance from the first hinge axis to the fourth hinge axis is equal to the distance from the fourth hinge axis to the second hinge axis, the distance from the first hinge axis to the fifth hinge axis is equal to the distance from the fifth hinge axis to the third hinge axis At this time, the guide structure of the upper and lower contact rods is basically not affected by the impact load perpendicular to the movement direction of the upper and lower contact rods, and the transmission efficiency of the transmission mechanism is high.

Description of drawings

Fig. 1 is the front view of the transmission mechanism of the circuit breaker in the embodiment of the circuit breaker;

Fig. 2 is a right view of the transmission mechanism of the circuit breaker in the embodiment of the circuit breaker;

Fig. 3 is a schematic diagram of the principle of the transmission mechanism of the circuit breaker in an embodiment of the circuit breaker;

Fig. 4 is a perspective view of the box body of the transmission box of the circuit breaker in the embodiment of the circuit breaker;

Fig. 5 is a structural schematic diagram of the box body of the transmission box of the circuit breaker in the embodiment of the circuit breaker;

Fig. 6 is a structural schematic diagram of a transmission box of the circuit breaker in an embodiment of the circuit breaker;

Fig. 7 is a schematic structural diagram of the circuit breaker in an embodiment of the circuit breaker.

In the figure: 1. Circuit breaker housing; 2. Circuit breaker trolley; 3. Upper arc extinguishing chamber; 4. Lower arc extinguishing chamber; 5. Upper equalizing capacitor; 6. Lower equalizing capacitor; 7. Transmission box; 8 , upper support; 9, lower support; 10, upper contact rod; 11, lower contact rod; 12, first insulating pillar; 13, insulating partition; 14, transmission box box; 15, insulating rod; 16. Upper connecting plate; 17. Lower connecting plate; 18. Second guide groove; 19. First hinge shaft; 20. Upper middle plate; 21. Upper middle plate; 22. Second hinge shaft; 23. Third hinge shaft; 24, the fourth hinge shaft; 25, the fifth hinge shaft; 26, the fixed hinge shaft; 27, the mounting hole; 30, the front side plate; 31, the rear side plate; 32, the soft connection; 33, the second insulating support ; 34, circuit breaker mechanism; 35, the third insulating pillar; 36, upper base plate; 37, lower base plate; 38, left side plate; 39, upper perforation; 40, lower perforation; 41, upper contact arm; Arm; 45, the first guide slot; 46, the third guide slot.

Detailed ways

The embodiment of the circuit breaker of the present invention is shown in Figures 1-7: the circuit breaker includes a circuit breaker housing 1, a circuit breaker trolley 2, a circuit breaker mechanism 34, an arc extinguishing chamber, a voltage equalizing capacitor, a transmission box 7, and an upper support 8 , the lower support 9, the upper contact arm 10, the lower contact arm 11, the first insulating support 12, the second insulating support 33, the third insulating support 35 and the insulating partition 13, etc. The arc extinguishing chamber includes an upper arc extinguishing chamber 3 and a lower arc extinguishing chamber 4 symmetrically arranged on the upper and lower sides of the transmission case 7 . The equalizing capacitors include an upper equalizing capacitor 5 and a lower equalizing capacitor 6 symmetrically arranged on the upper and lower sides of the transmission case 7 . The transmission box 7 includes a box body 14 and a transmission mechanism. The transmission mechanism includes an upper contact pull rod 10, a lower contact pull rod 11 and an insulating pull rod 15 that drives the upper and lower contact pull rods to move up and down by moving left and right, and also includes an upper connecting plate 16 and a lower connecting plate 17. The upper and lower connecting plates pass through The first hinge shaft 19 is hingedly connected to the insulating rod 15, the upper connecting plate 16 is hingedly connected to the upper contact rod 10 through the second hinge shaft 22, and the lower connecting plate 17 is hingedly connected to the lower contact rod 11 through the third hinge shaft 23, The transmission mechanism also includes a fixed hinge shaft 26, which is hinged with an upper middle plate 20 and a lower middle plate 21, the upper middle plate 20 is hingedly connected with the upper connecting plate 16 through the fourth hinge shaft 24, and the lower middle plate 21 is hinged through the fourth hinge shaft 24. The five hinged shafts 25 are hingedly connected with the lower connecting plate 17 . The fourth hinge axis 24 and the fifth hinge axis 25 are arranged symmetrically with respect to the axis of the insulating rod 15 , that is, the distance from the first hinge axis 19 to the fourth hinge axis 24 is equal to the distance from the first hinge axis 19 to the fifth hinge axis 25 . The distance from the first hinge axis 19 to the fourth hinge axis 24 is equal to the distance from the fourth hinge axis 24 to the second hinge axis 22, and the distance from the first hinge axis 19 to the fifth hinge axis 25 is equal to the fifth hinge axis 25 to the third hinge axis. The distance of the hinge axis 23. The box body includes an upper base plate 36 and a lower base plate 37 , a front side plate 30 , a rear side plate 31 and a left side plate 38 . The upper base plate 36, the lower base plate 37, the front side plate 30, the rear side plate 31 and the left side plate 38 form a cavity opening to the right. The left side plate 38 is provided with a left perforation for the insulation pull rod 15 to pass through in the left and right direction, the upper bottom plate 36 is provided with an upper perforation 39 for the upper contact pull rod 10 to pass through, and the lower bottom plate 37 is provided with a lower contact pull rod. 11 through the lower perforation 40, the front side plate 30 and the rear side plate 31 are correspondingly provided with a first guide slot 45 for guiding the first hinge shaft 19 and extending along the left and right direction, and a guide slot for the second hinge shaft 22. The second guide groove 18 extending in the vertical direction, the third guide groove 46 extending in the vertical direction for guiding the third hinge shaft 23 and the mounting hole 27 for fixing the hinge shaft 26 are installed. The box body 14 is integrally cast with high mechanical strength.

The schematic diagram of the transmission mechanism is shown in Figure 3. The fixed hinge axis is defined as point A0, the first hinge axis 19 is defined as point A1, the second hinge axis 22 is defined as point A2, the third hinge axis 23 is defined as A3, and the fourth hinge axis 24 is defined as A4 Point, the fifth hinge axis 25 is defined as A5. A4 is the midpoint of line segment A1A2, and A5 is the midpoint of line segment A1A3. The length of line segment A0A4 is equal to the length of A1A4 and also equal to the length of A0A5, the length of line segment A0A5 is equal to the length of line segment A1A5 and also equal to the length of A0A4. Point A1 moves up and down in the left and right direction to drive points A2 and A3 to move synchronously in the up and down direction, that is, the insulating rod 15 moving left and right drives the upper contact rod 10 and the lower contact rod 11 to move synchronously in the up and down direction to realize up and down extinguishing Arc chamber opening and closing. In this embodiment, the second guide groove 18 and the third guide groove 46 correspond to the guide structures of the upper contact rod 10 and the lower contact rod 11 respectively. Because the transmission mechanism includes the upper middle plate 20 and the lower middle plate 21, and A4 is the midpoint of the line segment A1A2, and A5 is the midpoint of the line segment A1A3, at this time, even if there is no second guide groove 18 and the third guide groove 46, the upper and lower touch points The movement of the head rod is still in the vertical up-down direction, there is no tendency to shift to both sides, and the side walls of the second guide groove 18 and the third guide groove 46 will not be pressurized, so the second guide groove 18 and the third guide groove 46 The guide groove 46 is not easily damaged. The function of the second guide groove 18 and the third guide groove 46 is to assist the limit and supplement the influence of errors such as processing and assembly. Moreover, the power transmission efficiency of the transmission mechanism in the present invention is high, and the active force is basically converted into the force required for the movement of the upper and lower contact rods. If there is no upper middle plate 20 and lower middle plate 21, the movement direction of the upper and lower contact rods is completely limited by the guide structure, and the force transmission efficiency is also low. The force required for the movement of the upper and lower contact rods is a component of the active force .

In other embodiments of the circuit breaker of the present invention, A4 is not the midpoint of the line segment A1A2, and A5 is not the midpoint of the line segment A1A3, that is. The distance from the first hinge axis 19 to the fourth hinge axis 24 is not equal to the distance from the fourth hinge axis 24 to the second hinge axis 22, and the distance from the first hinge axis 19 to the fifth hinge axis 25 is not equal to the distance from the fifth hinge axis 25 to the fifth hinge axis. The distance of the third hinge axis 23 . At this time, only the fourth hinge shaft 24 and the fifth hinge shaft 25 are symmetrically arranged relative to the axis of the insulating pull rod 15 .

The structure of the transmission box in the embodiment of the transmission box in the present invention is the same as the structure of the transmission box in the embodiment of the circuit breaker, and will not be repeated here. The structure of the transmission mechanism of the transmission box in the embodiment of the transmission mechanism of the transmission box in the present invention is the same as that of the transmission mechanism in the embodiment of the circuit breaker, and will not be repeated here.

Claims (6)

1. a kind of transmission case, including babinet and transmission mechanism, transmission mechanism includes upper contact head pull rod and lower contact pull rod and passes through The insulated tension pole that upper and lower contact pull rod is driven to move up and down is moved left and right, further includes upper plate and lower plate, upper and lower connecting plate leads to It crosses the first articulated shaft to be hinged and connected with insulated tension pole, upper plate is hinged and connected by the second articulated shaft and upper contact head pull rod, lower company Plate is hinged and connected by third articulated shaft and lower contact pull rod, it is characterised in that：Transmission mechanism further includes fixed hinge shaft, fixed hinge Upper mid plate and lower intermediate plate are hinged on axis, upper mid plate is hinged and connected by the 4th articulated shaft with upper plate, lower intermediate plate It is hinged and connected by the 5th articulated shaft with lower plate, babinet includes left plate, the upper plate being oppositely arranged and lower plate, sets relatively The front side board and back side panel put, upper plate, lower plate, front side board, back side panel and left plate form the cavity of opening to the right, left side Plate is equipped with the left perforation worn in left-right direction for insulated tension pole, and upper plate is equipped with what is worn for upper contact head pull rod Perforation, lower plate are equipped with the lower perforation worn for lower contact pull rod, are correspondingly arranged and are useful for pair on front side board and back side panel First articulated shaft is oriented to and the first guide groove that length extends in left-right direction, for be oriented to the second articulated shaft and length The second guide groove for vertically extending, for being led to the third that third articulated shaft is oriented to and length vertically extends To slot and for fixing the mounting hole that hinge shaft is installed, opening is both provided on forward and backward side plate towards the right side, connection second guiding The upper recessing groove that can get out of the way the second articulated shaft when mounted of slot is also both provided with opening on forward and backward side plate towards right, connection institute The lower recessing groove that can get out of the way third articulated shaft when mounted of third guide groove is stated, is located at the first guide groove on forward and backward side plate Upper and lower both sides are respectively arranged with the handle hole for being easily installed operation.

2. transmission case according to claim 1, it is characterised in that：The distance of first articulated shaft to the 4th articulated shaft is equal to the The distance of four articulated shafts to the second articulated shaft, the distance of the first articulated shaft to the 5th articulated shaft are equal to the 5th articulated shaft and are cut with scissors to third The distance of spindle.

3. transmission case according to claim 2, it is characterised in that：The babinet is made up of casting.

4. a kind of breaker, including transmission case, transmission case includes babinet and transmission mechanism, transmission mechanism include upper contact head pull rod and Lower contact pull rod and the insulated tension pole moved up and down by moving left and right the upper and lower contact pull rod of drive, further include upper plate under Connecting plate, upper and lower connecting plate are hinged and connected by the first articulated shaft with insulated tension pole, and upper plate is drawn by the second articulated shaft and upper contact head Bar is hinged and connected, and lower plate is hinged and connected by third articulated shaft and lower contact pull rod, it is characterised in that：Transmission mechanism further includes Fixed hinge shaft, fixes on hinge shaft and is hinged with upper mid plate and lower intermediate plate, and upper mid plate passes through the 4th articulated shaft and upper plate is cut with scissors Connect connected, lower intermediate plate is hinged and connected by the 5th articulated shaft with lower plate, the upper plate that babinet includes left plate, is oppositely arranged And lower plate, the front side board and back side panel that are oppositely arranged, upper plate, lower plate, front side board, back side panel and left plate form opening Cavity to the right, left plate are equipped with the left perforation worn in left-right direction for insulated tension pole, and upper plate, which is equipped with, to be used for The upper perforation that contact pull rod is worn, lower plate, which is equipped with, is used for the lower perforation that lower contact pull rod is worn, on front side board and back side panel It is correspondingly arranged and is useful for the first articulated shaft is oriented to and length extends in left-right direction the first guide groove, for being cut with scissors to second Spindle is oriented to and the second guide groove that length vertically extends, for be oriented to third articulated shaft and length vertically The third guide groove of direction extension and the mounting hole for fixing hinge shaft installation, be both provided on forward and backward side plate opening towards it is right, The upper recessing groove that can get out of the way the second articulated shaft when mounted of second guide groove is connected, is also both provided on forward and backward side plate Be open the lower recessing groove that can get out of the way third articulated shaft when mounted towards the right side, connecting the third guide groove, on forward and backward side plate The handle hole for being easily installed operation is respectively arranged with positioned at the both sides up and down of the first guide groove.

5. breaker according to claim 4, it is characterised in that：The distance of first articulated shaft to the 4th articulated shaft is equal to the The distance of four articulated shafts to the second articulated shaft, the distance of the first articulated shaft to the 5th articulated shaft are equal to the 5th articulated shaft and are cut with scissors to third The distance of spindle.

6. breaker according to claim 4, it is characterised in that：The babinet is made up of casting.