A vacuum circuit breaker transmission mechanism

Abstract

The present invention relates to the technical field of vacuum circuit breakers, and in particular to a transmission mechanism of a vacuum circuit breaker, comprising a mounting shell and a transmission mechanism; the transmission mechanism is arranged in a mounting cavity, and comprises a static touch plate, a mounting plate, and a power device, wherein the static touch plate is a horizontally arranged rectangular plate; and the moving touch plate is a horizontally arranged rectangular plate. When the switch is closed, the power device limits the rotation of the mounting plate, so that the moving touch plate remains parallel to the static touch plate and fits with the static touch plate. When the switch is opened, the power device drives the mounting plate to drive the moving touch plate to rotate around the vertical axis at a preset angle, so that the projection of the moving touch plate on the horizontal plane and the projection of the static touch plate on the horizontal plane are in an X shape, so as to reduce the fitting area of ​​the moving touch plate and the static touch plate, thereby increasing the resistance between the moving touch plate and the static touch plate, so as to reduce the probability of burning of the circuit and the machine due to the untimely separation of the moving touch plate and the static touch plate when the current in the circuit is too large.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum circuit breakers, and in particular to a transmission mechanism of a vacuum circuit breaker. Background Art

[0002] The vacuum circuit breaker is named because its arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum. It has the advantages of small size, light weight, suitable for frequent operation, and arc extinguishing without maintenance. It is widely used in distribution networks. Circuit breakers are mainly used to control the on and off of circuits. When the circuit has excessive current or heavy load, the current detector transmits the electrical signal to the controller, and then transmits the electrical signal to the circuit breaker through the controller, and the circuit breaker is opened.

[0003] In the prior art, for example, the Chinese patent with the announcement number CN106971904B, named as the vacuum circuit breaker closing transmission mechanism, records in the public technical solution that when the circuit is tripped due to excessive current or heavy load, the output crank drives the crank clockwise through the main shaft connecting rod, crank arm, and transmission shaft, and the top of the crank enters the linear groove part from the arc groove part of the guide groove, and then pulls the moving contact connecting rod downward through the guide groove, and the moving contact is separated from the static contact to complete the tripping action. However, in the process of circuit breaker tripping, due to the excessive current in the circuit, it takes a certain amount of time for the moving contact to separate from the static contact, resulting in untimely tripping of the circuit breaker, causing the circuit and machine to burn. Summary of the invention

[0004] The present invention provides a vacuum circuit breaker transmission mechanism to solve the above problems.

[0005] A vacuum circuit breaker transmission mechanism of the present invention adopts the following technical solution: a vacuum circuit breaker transmission mechanism comprises a mounting shell and a transmission mechanism.

[0006] The mounting shell forms a mounting cavity. The mounting cavity is sealed in a vacuum state. The mounting shell is fixed in the vacuum circuit breaker.

[0007] The transmission mechanism is arranged in the installation cavity and comprises a stationary contact plate, a mounting plate and a power device.

[0008] The static touch plate is a horizontally arranged rectangular plate. The length direction of the static touch plate is arranged along the front-back direction. The static touch plate is fixed on the cavity wall of the installation cavity.

[0009] The mounting plate is arranged below the static touch plate and is mounted on the cavity wall of the mounting cavity by rotating around the vertical axis. A dynamic touch plate is arranged between the mounting plate and the static touch plate. The dynamic touch plate is a horizontally arranged rectangular plate. In the initial state, the projection of the dynamic touch plate on the horizontal plane is collinear with the projection of the static touch plate on the horizontal plane. A lifting device is arranged between the dynamic touch plate and the mounting plate.

[0010] The lifting device is used to drive the moving touch plate to maintain a parallel state with the static touch plate and move up to fit with the static touch plate when closing the switch, and in the process of the moving touch plate approaching the static touch plate, the moving touch plate is first accelerated to move up, and then decelerated and slowly moved up to fit with the static touch plate. This reduces the time for the moving touch plate and the static touch plate to fit, so as to achieve rapid closing of the switch. At the same time, since the speed of the moving touch plate and the static touch plate is reduced when they fit, and since the moving touch plate and the static touch plate are kept parallel when they fit, the fitting time of each point on the fitting surface of the moving touch plate and the static touch plate is the same, so as to minimize the probability of bouncing when the moving touch plate and the static touch plate fit.

[0011] The power device is used to limit the rotation of the mounting plate when closing the switch, so that the moving touch plate remains parallel to the static touch plate and fits with the static touch plate. When opening the switch, the mounting plate drives the moving touch plate to rotate around the vertical axis at a preset angle, so that the projection of the moving touch plate on the horizontal plane and the projection of the static touch plate on the horizontal plane are in an X shape. This is to reduce the fitting area of ​​the moving touch plate and the static touch plate, thereby increasing the resistance between the moving touch plate and the static touch plate, so as to reduce the probability of burning the circuit and the machine due to untimely separation of the moving touch plate and the static touch plate when the current in the circuit is too large.

[0012] Furthermore, the lifting device includes a swing arm, a rotating assembly, and a speed changing assembly.

[0013] There are two swing rods, which are distributed between the mounting plate and the moving touch plate in the front-to-back direction. The swing rod is tilted up and down, with an upper rotating shaft fixed at the upper end and a lower rotating shaft fixed at the lower end. The upper rotating shaft is horizontally arranged, and the axis of the upper rotating shaft is perpendicular to the length direction of the moving touch plate. The upper rotating shaft is rotatably mounted on the moving touch plate. The lower rotating shaft is horizontally arranged, and the axis of the lower rotating shaft is perpendicular to the length direction of the moving touch plate. The lower rotating shaft is rotatably mounted on the mounting plate. The moving touch plate, the mounting plate and the two swing rods form a parallelogram structure. When the lower rotating shaft is driven to drive the swing rod to rotate around the corresponding axis of the lower rotating shaft, the moving touch plate is driven to maintain a parallel state with the static touch plate and move up to fit with the static touch plate.

[0014] The rotating assembly includes a matching shaft and a rotating structure. The matching shaft is arranged below the lower rotating shaft, and the axis of the matching shaft is parallel to the axis of the lower rotating shaft. The matching shaft is rotatably mounted on the mounting plate. The rotating structure is used to drive the matching shaft to rotate.

[0015] The speed change assembly is arranged between the mating shaft and the lower rotating shaft, and includes a large transmission ratio structure and a small transmission ratio structure. When the moving touch plate approaches the stationary touch plate upward, the large transmission ratio structure is used to drive the lower rotating shaft to rotate rapidly, so that the moving touch plate moves upward at an increased speed, and then the small transmission ratio structure is used to reduce the speed of the lower rotating shaft, so that the moving touch plate slows down and moves upward slowly to fit the stationary touch plate.

[0016] Furthermore, the rotating structure includes a top plate and a rotating wheel. The top plate is arranged below the mounting plate. A rotating rack arranged vertically is fixed to the upper end of the top plate. The rotating rack and the mounting plate are slidably matched up and down. The rotating wheel is coaxially fixed on the matching shaft. The rotating wheel and the rotating rack are meshed for transmission.

[0017] Furthermore, the large transmission ratio structure includes a first small wheel and a first large wheel. The first small wheel is an incomplete gear coaxially fixed on the lower rotating shaft. The teeth of the first small wheel are distributed in a sector shape around the circumference of the lower rotating shaft. The first large wheel is a full gear coaxially fixed on the matching shaft. When in the open state, the first large wheel and the first small wheel are meshed. The diameter of the first small wheel is smaller than the diameter of the first large wheel.

[0018] Further, the small transmission ratio structure includes a second small wheel and a second large wheel. The second small wheel is a full gear coaxially fixed on the matching shaft. The second large wheel is an incomplete gear coaxially fixed on the lower rotating shaft. The teeth of the second large wheel are distributed in a sector shape around the lower rotating shaft. And the sum of the central angle of the sector of the second large wheel's teeth distribution and the central angle of the sector of the first small wheel's teeth distribution is 2π. When in the closed state, the second large wheel and the second small wheel are meshed. The diameter of the second small wheel is smaller than the diameter of the second large wheel. When the top plate moves up, the top plate drives the rotating rack to move up, and the rotating rack drives the matching shaft to rotate through the rotating wheel. The matching shaft drives the first small wheel and the second large wheel to rotate. In the initial stage of closing, the first small wheel drives the first large wheel to rotate. Since the diameter of the first small wheel is smaller than the diameter of the first large wheel, the lower rotating shaft is rotated rapidly in the initial stage of closing, so that the moving touch plate moves up at an increased speed. When the lower rotating shaft rotates a certain angle, the second large wheel and the second small wheel are meshed. Since the diameter of the second small wheel is smaller than that of the second large wheel, the rotation speed of the lower rotating shaft is reduced in the later stage of closing the switch, so that the moving touch plate is decelerated and then slowly moves upward to fit with the static touch plate, thereby reducing the impact when the static touch plate and the moving touch plate are in contact and fitting, and reducing the probability of bouncing when the moving touch plate and the static touch plate are in contact.

[0019] Furthermore, the power device includes an outer cylinder, an inner cylinder, a driving rod, a driving structure, and a one-way structure.

[0020] The axis of the outer cylinder is colinear with the rotation axis of the mounting plate. The outer cylinder is arranged below the top plate. The upper end of the outer cylinder and the top plate slide up and down through splines.

[0021] A connecting plate is provided between the outer cylinder and the mounting shell. The connecting plate and the mounting shell are fixedly connected. The connecting plate and the outer cylinder are rotationally matched. A torsion spring is fixedly connected between the connecting plate and the outer cylinder.

[0022] The inner cylinder is coaxially arranged in the outer cylinder. A plurality of spiral grooves are arranged on the inner side wall of the inner cylinder. The plurality of spiral grooves are evenly distributed along the circumference of the inner cylinder.

[0023] The driving rod is arranged below the inner cylinder, and the upper end thereof passes through the inner cylinder and is slidably and rotatably matched with the inner cylinder. The upper end of the driving rod is rotatably matched with the lower end surface of the top plate.

[0024] A spiral protrusion is provided at the upper end of the driving rod. The protrusion is provided below the inner cylinder and corresponds to the spiral groove. When the driving rod moves upward, the protrusion slides into the spiral groove and slides with the spiral groove to drive the inner cylinder to rotate when the driving rod moves upward.

[0025] The driving structure is used to drive the driving rod to move upward when closing the switch, and to drive the driving rod to move downward when opening the switch.

[0026] The one-way structure is arranged between the inner cylinder and the outer cylinder, and is used to make the inner cylinder rotate relative to the outer cylinder when the driving rod moves upward, and to make the inner cylinder and the outer cylinder rotate synchronously when the driving rod moves downward. When closing the switch, the driving rod drives the protrusion to move upward, and when the protrusion slides into the spiral groove and slides with the spiral groove, the driving rod drives the inner cylinder to rotate. In the closing process, the one-way structure makes the inner cylinder rotate relative to the outer cylinder, and the outer cylinder is stationary relative to the mounting shell. Then the driving rod moves upward and pushes the top plate upward, so that the top plate and the outer cylinder slide relative to each other in the up and down directions.

[0027] When the gate is opened, the driving rod drives the protrusion downward, and drives the inner cylinder to rotate in the opposite direction through the protrusion. In the process of opening the gate, the one-way structure causes the inner cylinder and the outer cylinder to rotate synchronously against the torsion spring. Then the driving rod drives the top plate to move downward synchronously. At the same time, the outer cylinder drives the top plate to rotate the mounting plate through the rotating rack, and the mounting plate drives the moving touch plate to rotate synchronously through the swing rod, so that when the gate is opened, the mounting plate drives the moving touch plate to rotate around the vertical axis at a preset angle, so that the projection of the moving touch plate on the horizontal plane and the projection of the static touch plate on the horizontal plane are X-shaped. This reduces the contact area between the moving touch plate and the static touch plate, thereby increasing the resistance between the moving touch plate and the static touch plate, so as to reduce the probability of burning the circuit and the machine due to the untimely separation of the moving touch plate and the static touch plate when the current in the circuit is too large.

[0028] When the driving rod drives the protrusion to move downward until the protrusion and the spiral groove are disengaged, the torsion spring drives the outer cylinder to drive the top plate to reset, the top plate drives the mounting plate to reset through the rotating rack, and the mounting plate drives the moving touch plate to reset through the rocker rod.

[0029] Furthermore, the driving structure includes a first rod, a second rod, and a driving motor; the first rod is located above the second rod; the first rod is tilted up and down, and the upper end is hinged to the lower end of the driving rod; the second rod is tilted up and down, and the upper end is hinged to the lower end of the first rod; the driving motor is fixed to the mounting shell through a transverse plate; the output shaft of the driving motor is horizontally arranged and fixedly connected to the lower end of the second rod. The driving motor drives the second rod to rotate, and the second rod drives the first rod to swing, so that the driving rod moves up and down.

[0030] Furthermore, the one-way structure comprises a one-way bearing; the outer ring of the one-way bearing is fixedly connected to the inner wall of the outer cylinder; the inner ring of the one-way bearing is fixedly connected to the outer wall of the inner cylinder.

[0031] Furthermore, the mounting shell is cylindrical; an annular groove is provided on the inner side wall of the mounting shell; a sliding rod is fixed on the mounting plate; and the sliding rod and the annular groove are slidably matched.

[0032] Furthermore, two lifting devices are symmetrically provided with respect to the length direction of the movable touch plate.

[0033] The beneficial effects of the present invention are:

[0034] 1. When closing the switch, the power device limits the rotation of the mounting plate, so that the moving touch plate remains parallel to the static touch plate and fits with the static touch plate. When opening the switch, the power device drives the mounting plate to drive the moving touch plate to rotate around the vertical axis at a preset angle, so that the projection of the moving touch plate on the horizontal plane and the projection of the static touch plate on the horizontal plane are X-shaped, so as to reduce the fitting area of ​​the moving touch plate and the static touch plate, thereby increasing the resistance between the moving touch plate and the static touch plate, so as to reduce the probability of burning the circuit and the machine due to untimely separation of the moving touch plate and the static touch plate when the current in the circuit is too large.

[0035] 2. When closing the switch, the lifting device drives the moving touch plate to maintain a parallel state with the static touch plate and move up until it is in contact with the static touch plate. In the process of the moving touch plate approaching the static touch plate, the moving touch plate is first moved up at an increased speed, and then the moving touch plate is decelerated and slowly moved up to contact with the static touch plate; so as to reduce the contact time of the moving touch plate and the static touch plate to achieve rapid closing of the switch. At the same time, since the speed of the moving touch plate and the static touch plate is reduced when they are in contact, and since the moving touch plate and the static touch plate are kept parallel when they are in contact, the contact moments of each point on the contact surface of the moving touch plate and the static touch plate are the same, so as to minimize the probability of bouncing when the moving touch plate and the static touch plate are in contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 It is a structural schematic diagram of an embodiment of a vacuum circuit breaker transmission mechanism of the present invention;

[0038] Figure 2 A front view of an embodiment of a vacuum circuit breaker transmission mechanism of the present invention;

[0039] Figure 3 A top view of an embodiment of a vacuum circuit breaker transmission mechanism of the present invention;

[0040] Figure 4 for Figure 3 Sectional view at AA in the middle;

[0041] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0042] Figure 6 A schematic diagram of a lifting device and a moving contact plate of an embodiment of a vacuum circuit breaker transmission mechanism of the present invention;

[0043] Figure 7 It is a front view of a lifting device and a moving contact plate of an embodiment of a vacuum circuit breaker transmission mechanism of the present invention;

[0044] Figure 8 is a schematic diagram of another angle of an embodiment of a vacuum circuit breaker transmission mechanism of the present invention;

[0045] Fig. 9 for Figure 8 Enlarged view of point C in the middle.

[0046] In the figure: 100, mounting shell; 200, stationary touch plate; 300, moving touch plate; 400, mounting plate; 510, swing rod; 511, lower rotating shaft; 520, matching shaft; 530, top plate; 531, rotating rack; 540, rotating wheel; 551, first small wheel; 552, first large wheel; 561, second small wheel; 562, second large wheel; 610, outer cylinder; 620, inner cylinder; 630, one-way bearing; 640, driving rod; 651, first rod; 652, second rod; 653, driving motor. DETAILED DESCRIPTION

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] An embodiment of a vacuum circuit breaker transmission mechanism of the present invention is as follows Figures 1 to 9 As shown: a vacuum circuit breaker transmission mechanism, including a mounting shell 100 and a transmission mechanism; the mounting shell 100 is cylindrical; an annular groove is provided on the inner wall of the mounting shell 100; the mounting shell 100 surrounds a mounting cavity; the mounting cavity is sealed in a vacuum state; the mounting shell 100 is fixed in the vacuum circuit breaker; the transmission mechanism is arranged in the mounting cavity, including a static touch plate 200, a mounting plate 400, and a power device; the static touch plate 200 is a horizontally arranged rectangular plate; the length direction of the static touch plate 200 is arranged along the front-back direction; the static touch plate 200 is fixed on the cavity wall of the mounting cavity.

[0049] The mounting plate 400 is arranged below the stationary touch plate 200 and is mounted on the wall of the mounting cavity by rotating around the vertical axis. A slide bar is fixed on the mounting plate 400. The slide bar and the annular groove are slidably matched. A moving touch plate 300 is arranged between the mounting plate 400 and the stationary touch plate 200. The moving touch plate 300 is a horizontally arranged rectangular plate. In the initial state, the projection of the moving touch plate 300 on the horizontal plane is collinear with the projection of the stationary touch plate 200 on the horizontal plane. A lifting device is arranged between the moving touch plate 300 and the mounting plate 400.

[0050] The lifting device is used to drive the moving touch plate 300 to move upward in parallel with the static touch plate 200 to fit with the static touch plate 200 when closing the switch, and in the process of the moving touch plate 300 approaching the static touch plate 200, the moving touch plate 300 is first moved upward at an accelerated speed, and then the moving touch plate 300 is decelerated and slowly moved upward to fit with the static touch plate 200; so as to reduce the fitting time of the moving touch plate 300 and the static touch plate 200, so as to achieve rapid closing of the switch. At the same time, since the moving touch plate 30 At the same time, since the moving touch panel 300 and the stationary touch panel 200 remain parallel when they are attached, the attaching time of each point on the attaching surface of the moving touch panel 300 and the stationary touch panel 200 is the same, thereby minimizing the probability of bouncing when the moving touch panel 300 and the stationary touch panel 200 are attached; two lifting devices are symmetrically provided with respect to the length direction of the moving touch panel 300. The lifting device includes a swing rod 510, a rotating assembly, and a speed change assembly.

[0051] There are two swing rods 510, which are distributed between the mounting plate 400 and the moving touch panel 300 along the front-back direction; the swing rods 510 are tilted up and down, with an upper rotating shaft fixed at the upper end and a lower rotating shaft 511 fixed at the lower end; the upper rotating shaft is horizontally arranged, and the axis of the upper rotating shaft is perpendicular to the length direction of the moving touch panel 300; the upper rotating shaft is rotatably mounted on the moving touch panel 300; the lower rotating shaft 511 is horizontally arranged, and the axis of the lower rotating shaft 511 is perpendicular to the length direction of the moving touch panel 300; the lower rotating shaft 511 is rotatably mounted on the mounting plate 400; the moving touch panel 300, the mounting plate 400 and the two swing rods 510 form a parallelogram structure; when the lower rotating shaft 511 is driven to drive the swing rod 510 to rotate around the corresponding axis of the lower rotating shaft 511, the moving touch panel 300 is driven to maintain a parallel state with the static touch panel 200 and move up to fit with the static touch panel 200.

[0052] The rotating assembly includes a mating shaft 520 and a rotating structure; the mating shaft 520 is arranged below the lower rotating shaft 511, and the axis of the mating shaft 520 is parallel to the axis of the lower rotating shaft 511; the mating shaft 520 is rotatably installed on the mounting plate 400; the rotating structure is used to drive the mating shaft 520 to rotate; the rotating structure includes a top plate 530 and a rotating wheel 540; the top plate 530 is arranged below the mounting plate 400; a vertically arranged rotating rack 531 is fixed to the upper end of the top plate 530; the rotating rack 531 and the mounting plate 400 are slidably matched up and down; the rotating wheel 540 is coaxially fixed on the mating shaft 520; the rotating wheel 540 and the rotating rack 531 are meshed for transmission.

[0053] The speed change assembly is arranged between the matching shaft 520 and the lower rotating shaft 511, and includes a large transmission ratio structure and a small transmission ratio structure. When the moving touch plate 300 moves upward to the stationary touch plate 200, the large transmission ratio structure is used to drive the lower rotating shaft 511 to rotate rapidly, so that the moving touch plate 300 increases speed and moves upward, and then the small transmission ratio structure is used to reduce the speed of the lower rotating shaft 511, so that the moving touch plate 300 decelerates and then slowly moves upward to fit the stationary touch plate 200. The large transmission ratio structure includes a first small wheel 551 and a first large wheel 552. The first small wheel 551 is an incomplete gear, coaxially fixed on the lower rotating shaft 511. The teeth of the first small wheel 551 are distributed in a fan shape around the lower rotating shaft 511. The first large wheel 552 is a full gear, coaxially fixed on the matching shaft 520. When in the open state, the first large wheel 552 and the first small wheel 551 are meshed. The diameter of the first small wheel 551 is smaller than the diameter of the first large wheel 552.

[0054] The small transmission ratio structure includes a second small wheel 561 and a second large wheel 562; the second small wheel 561 is a full gear coaxially fixed on the matching shaft 520; the second large wheel 562 is an incomplete gear coaxially fixed on the lower rotating shaft 511; the teeth of the second large wheel 562 are distributed in a sector shape around the lower rotating shaft 511; and the sum of the central angle of the sector of the teeth distribution of the second large wheel 562 and the central angle of the sector of the teeth distribution of the first small wheel 551 is 2π; when in the closed state, the second large wheel 562 and the second small wheel 561 are meshed; the diameter of the second small wheel 561 is smaller than the diameter of the second large wheel 562. When the top plate 530 moves up, the top plate 530 drives the rotating rack 531 to move up, and the rotating rack 531 drives the matching shaft 520 to rotate through the rotating wheel 540. The mating shaft 520 drives the first small wheel 551 and the second large wheel 562 to rotate. In the initial stage of closing, the first small wheel 551 drives the first large wheel 552 to rotate. Since the diameter of the first small wheel 551 is smaller than the diameter of the first large wheel 552, the lower rotating shaft 511 rotates rapidly in the initial stage of closing, so that the moving touch plate 300 moves upward at an increased speed. After the lower rotating shaft 511 rotates a certain angle, the second large wheel 562 meshes with the second small wheel 561. Since the diameter of the second small wheel 561 is smaller than the diameter of the second large wheel 562, the rotation speed of the lower rotating shaft 511 is reduced in the later stage of closing, so that the moving touch plate 300 moves upward slowly after deceleration and fits with the static touch plate 200, reducing the impact when the static touch plate 200 and the moving touch plate 300 abut and fit, and reducing the probability of bouncing when the moving touch plate 300 and the static touch plate 200 fit.

[0055] The power device is used to limit the rotation of the mounting plate 400 when the switch is closed, so that the moving touch plate 300 remains parallel to the static touch plate 200 and fits with the static touch plate 200. When the switch is opened, the mounting plate 400 drives the moving touch plate 300 to rotate around the vertical axis at a preset angle, so that the projection of the moving touch plate 300 on the horizontal plane and the projection of the static touch plate 200 on the horizontal plane are in an X shape. This is to reduce the fitting area of ​​the moving touch plate 300 and the static touch plate 200, thereby increasing the resistance between the moving touch plate 300 and the static touch plate 200, so as to reduce the probability of burning the circuit and the machine due to the untimely separation of the moving touch plate 300 and the static touch plate 200 when the current in the circuit is too large. The power device includes an outer cylinder 610, an inner cylinder 620, a driving rod 640, a driving structure, and a one-way structure; the axis of the outer cylinder 610 and the rotation axis of the mounting plate 400 are colinear; the outer cylinder 610 is arranged below the top plate 530; the upper end of the outer cylinder 610 and the top plate 530 are slidably matched up and down through splines.

[0056] A connecting plate is provided between the outer cylinder 610 and the mounting shell 100; the connecting plate and the mounting shell 100 are fixedly connected; the connecting plate and the outer cylinder 610 are rotatably matched; a torsion spring is fixedly connected between the connecting plate and the outer cylinder 610; the inner cylinder 620 is coaxially arranged in the outer cylinder 610; a plurality of spiral grooves are provided on the inner side wall of the inner cylinder 620; the plurality of spiral grooves are uniformly distributed along the circumference of the inner cylinder 620; the driving rod 640 is provided below the inner cylinder 620, the upper end of which passes through the inner cylinder 620, and can be connected to the inner cylinder 620 Sliding and rotatable fit; the upper end of the driving rod 640 and the lower end surface of the top plate 530 are rotatably fitted; a spiral protrusion is provided on the upper end of the driving rod 640; the protrusion is provided below the inner cylinder 620 and corresponds to the spiral groove; when the driving rod 640 moves upward, the protrusion slides into the spiral groove and slidably fits with the spiral groove; so as to drive the inner cylinder 620 to rotate when the driving rod 640 moves upward; the driving structure is used to drive the driving rod 640 to move upward when closing the switch, and drive the driving rod 640 to move downward when opening the switch.

[0057] The one-way structure is provided between the inner cylinder 620 and the outer cylinder 610, and is used to rotate the inner cylinder 620 relative to the outer cylinder 610 when the driving rod 640 moves upward, and to rotate the inner cylinder 620 and the outer cylinder 610 synchronously when the driving rod 640 moves downward. The one-way structure includes a one-way bearing 630; the outer ring of the one-way bearing 630 is fixedly connected to the inner side wall of the outer cylinder 610; and the inner ring of the one-way bearing 630 is fixedly connected to the outer side wall of the inner cylinder 620.

[0058] When closing the switch, the driving rod 640 drives the protrusion to move upward, and when the protrusion slides into the spiral groove and slides with the spiral groove, the driving rod 640 drives the inner cylinder 620 to rotate. In the closing process, the one-way structure makes the inner cylinder 620 rotate relative to the outer cylinder 610, and the outer cylinder 610 is stationary relative to the mounting shell 100. Then the driving rod 640 moves upward and pushes the top plate 530 upward, so that the top plate 530 and the outer cylinder 610 slide relative to each other in the up and down directions.

[0059] When the gate is opened, the driving rod 640 drives the protrusion downward, and drives the inner cylinder 620 to rotate in the opposite direction through the protrusion. In the process of opening the gate, the one-way structure makes the inner cylinder 620 and the outer cylinder 610 rotate synchronously against the torsion spring. Then the driving rod 640 drives the top plate 530 to move downward synchronously, and at the same time, the outer cylinder 610 drives the top plate 530 to rotate the mounting plate 400 through the rotating rack 531, and the mounting plate 400 drives the moving touch plate 300 to rotate synchronously through the swing rod 510, so that when the gate is opened, the mounting plate 400 drives the moving touch plate 300 to rotate around the vertical axis by a preset angle, so that the projection of the moving touch plate 300 on the horizontal plane and the projection of the static touch plate 200 on the horizontal plane are in an X shape. The contact area between the movable touch panel 300 and the stationary touch panel 200 is reduced, thereby increasing the resistance between the movable touch panel 300 and the stationary touch panel 200, so as to reduce the probability of burning the circuit and the machine due to untimely separation of the movable touch panel 300 and the stationary touch panel 200 when the current in the circuit is too large.

[0060] When the driving rod 640 drives the protrusion to move downward until the protrusion and the spiral groove are disengaged, the torsion spring drives the outer cylinder 610 to drive the top plate 530 to reset, the top plate 530 drives the mounting plate 400 to reset by rotating the rack 531, and the mounting plate 400 drives the movable touch plate 300 to reset through the rocker rod 510.

[0061] In this embodiment, the driving structure includes a first rod 651, a second rod 652, and a driving motor 653; the first rod 651 is located above the second rod 652; the first rod 651 is tilted up and down, and the upper end is hinged to the lower end of the driving rod 640; the second rod 652 is tilted up and down, and the upper end is hinged to the lower end of the first rod 651; the driving motor 653 is fixed to the mounting shell 100 through a transverse plate; the output shaft of the driving motor 653 is horizontally arranged and fixedly connected to the lower end of the second rod 652. The driving motor 653 drives the second rod 652 to rotate, and the second rod 652 drives the first rod 651 to swing, so that the driving rod 640 moves up and down.

[0062] In combination with the above embodiments, the use principle and working process of the present invention are as follows: when closing the switch, the driving rod 640 drives the protrusion to move upward. When the protrusion slides into the spiral groove and slides with the spiral groove, the driving rod 640 drives the inner cylinder 620 to rotate. Then, during the closing process, the one-way bearing 630 causes the inner cylinder 620 to rotate relative to the outer cylinder 610, and the outer cylinder 610 is stationary relative to the mounting shell 100. Then the driving rod 640 moves upward and pushes the top plate 530 upward, so that the top plate 530 and the outer cylinder 610 slide relative to each other in the up and down directions. And when the top plate 530 moves upward, the top plate 530 drives the rotating rack 531 to move upward, and the rotating rack 531 drives the matching shaft 520 to rotate through the rotating wheel 540. The mating shaft 520 drives the first small wheel 551 and the second large wheel 562 to rotate. In the initial stage of closing, the first small wheel 551 drives the first large wheel 552 to rotate. Since the diameter of the first small wheel 551 is smaller than the diameter of the first large wheel 552, the lower rotating shaft 511 rotates rapidly in the initial stage of closing, so that the moving touch plate 300 moves upward at an increased speed. After the lower rotating shaft 511 rotates a certain angle, the second large wheel 562 meshes with the second small wheel 561. Since the diameter of the second small wheel 561 is smaller than the diameter of the second large wheel 562, the rotation speed of the lower rotating shaft 511 is reduced in the later stage of closing, so that the moving touch plate 300 moves upward slowly after deceleration and fits with the static touch plate 200, reducing the impact when the static touch plate 200 and the moving touch plate 300 abut and fit, and reducing the probability of bouncing when the moving touch plate 300 and the static touch plate 200 fit. When the switch is closed, the movable touch plate 300, the mounting plate 400 and the two swing rods 510 form a parallelogram structure to drive the movable touch plate 300 to maintain a parallel state with the stationary touch plate 200 and move upward to fit with the stationary touch plate 200. In the process of the movable touch plate 300 approaching the stationary touch plate 200, the movable touch plate 300 is first moved upward at an increased speed, and then the movable touch plate 300 is decelerated and slowly moved upward to fit with the stationary touch plate 200; so as to reduce the friction between the movable touch plate 300 and the stationary touch plate 200. 0 bonding time is reduced to achieve fast closing. At the same time, the speed of the moving touch panel 300 and the stationary touch panel 200 is reduced when they are bonded. At the same time, the moving touch panel 300 and the stationary touch panel 200 remain parallel when they are bonded, so that the bonding moments of various points on the bonding surfaces of the moving touch panel 300 and the stationary touch panel 200 are the same, thereby minimizing the probability of bouncing when the moving touch panel 300 and the stationary touch panel 200 are bonded.

[0063] When the gate is opened, the driving rod 640 drives the protrusion downward, and drives the inner cylinder 620 to rotate in the opposite direction through the protrusion. In the process of opening the gate, the one-way bearing 630 causes the inner cylinder 620 and the outer cylinder 610 to rotate synchronously against the torsion spring. Then the driving rod 640 drives the top plate 530 to move downward synchronously, and at the same time, the outer cylinder 610 drives the top plate 530 to rotate the mounting plate 400 through the rotating rack 531, and the mounting plate 400 drives the moving touch plate 300 to rotate synchronously through the swing rod 510, so that when the gate is opened, the mounting plate 400 drives the moving touch plate 300 to rotate around the vertical axis at a preset angle, so that the projection of the moving touch plate 300 on the horizontal plane and the projection of the static touch plate 200 on the horizontal plane are in an X shape. The contact area between the moving touch panel 300 and the stationary touch panel 200 is reduced, thereby increasing the resistance between the moving touch panel 300 and the stationary touch panel 200, so as to reduce the probability of burning the circuit and the machine due to the untimely separation of the moving touch panel 300 and the stationary touch panel 200 when the current in the circuit is too large. When the driving rod 640 drives the protrusion to move downward until the protrusion and the spiral groove are separated, the torsion spring drives the outer cylinder 610 to drive the top plate 530 to reset, the top plate 530 drives the mounting plate 400 to reset by rotating the rack 531, and the mounting plate 400 drives the moving touch panel 300 to reset through the swing rod 510.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum circuit breaker transmission mechanism, characterized in that: Including a mounting shell and a transmission mechanism; The installation shell forms an installation cavity; the installation cavity is sealed in a vacuum state; the installation shell is fixed in the vacuum circuit breaker; The transmission mechanism is arranged in the installation cavity, and includes a stationary contact plate, a mounting plate, and a power device; The static touch plate is a horizontally arranged rectangular plate; the length direction of the static touch plate is arranged along the front-back direction; the static touch plate is fixed on the cavity wall of the installation cavity; The mounting plate is arranged below the static touch plate and is mounted on the cavity wall of the mounting cavity by rotating around the vertical axis; a dynamic touch plate is arranged between the mounting plate and the static touch plate; the dynamic touch plate is a horizontally arranged rectangular plate; in the initial state, the projection of the dynamic touch plate on the horizontal plane is collinear with the projection of the static touch plate on the horizontal plane; a lifting device is arranged between the dynamic touch plate and the mounting plate; The lifting device is used to drive the moving touch plate to maintain a parallel state with the static touch plate and move up to fit with the static touch plate when the switch is closed, and in the process of the moving touch plate approaching the static touch plate, the moving touch plate is first moved up at an increased speed, and then the moving touch plate is moved up at a reduced speed to fit with the static touch plate; the lifting device includes a swing rod, a rotating assembly, and a speed change assembly; the rotating assembly includes a matching shaft and a rotating structure; the rotating structure includes a top plate and a rotating wheel; The power device is used to limit the rotation of the mounting plate when closing the switch, so that the moving touch plate remains parallel to the static touch plate and fits with the static touch plate. When opening the switch, the mounting plate drives the moving touch plate to rotate around the vertical axis at a preset angle, so that the projection of the moving touch plate on the horizontal plane and the projection of the static touch plate on the horizontal plane are X-shaped; the power device includes an outer cylinder, an inner cylinder, a driving rod, a driving structure, and a one-way structure; the axis of the outer cylinder and the rotation axis of the mounting plate are colinear; the outer cylinder is arranged below the top plate; the upper end of the outer cylinder and the top plate are slidably matched up and down by splines; a connecting plate is provided between the outer cylinder and the mounting shell; the connecting plate and the mounting shell are fixedly connected; the connecting plate and the outer cylinder are rotationally matched; a torsion spring is fixedly connected between the connecting plate and the outer cylinder; the inner cylinder is coaxial The outer cylinder is arranged in the outer cylinder; a plurality of spiral grooves are arranged on the inner side wall of the inner cylinder; the plurality of spiral grooves are evenly distributed along the circumference of the inner cylinder; the driving rod is arranged below the inner cylinder, the upper end of which passes through the inner cylinder and is slidably and rotatably matched with the inner cylinder; the upper end of the driving rod is rotatably matched with the lower end surface of the top plate; a spiral protrusion is arranged on the upper end of the driving rod; the protrusion is arranged below the inner cylinder and corresponds to the spiral groove; when the driving rod moves upward, the protrusion slides into the spiral groove and slidably matches with the spiral groove; the driving structure is used to drive the driving rod to move upward when closing the switch and to drive the driving rod to move downward when opening the switch; the unidirectional structure is arranged between the inner cylinder and the outer cylinder, and is used to make the inner cylinder rotate relative to the outer cylinder when the driving rod moves upward, and to make the inner cylinder and the outer cylinder rotate synchronously when the driving rod moves downward.

2. A vacuum circuit breaker transmission mechanism according to claim 1, characterized in that: There are two swing rods, which are distributed between the mounting plate and the moving touch plate in the front-back direction; the swing rods are tilted up and down, with an upper rotating shaft fixed at the upper end and a lower rotating shaft fixed at the lower end; the upper rotating shaft is horizontally arranged, and the axis of the upper rotating shaft is perpendicular to the length direction of the moving touch plate; the upper rotating shaft is rotatably mounted on the moving touch plate; the lower rotating shaft is horizontally arranged, and the axis of the lower rotating shaft is perpendicular to the length direction of the moving touch plate; the lower rotating shaft is rotatably mounted on the mounting plate; the moving touch plate, the mounting plate and the two swing rods form a parallelogram structure; The matching shaft is arranged below the lower rotating shaft, and the axis of the matching shaft is parallel to the axis of the lower rotating shaft; the matching shaft is rotatably mounted on the mounting plate; and the rotating structure is used to drive the matching shaft to rotate; The speed change assembly is arranged between the matching shaft and the lower rotating shaft, and includes a large transmission ratio structure and a small transmission ratio structure. When the moving touch plate approaches the stationary touch plate upward, the large transmission ratio structure is used to drive the lower rotating shaft to rotate rapidly, so that the moving touch plate moves upward at an increased speed, and then the small transmission ratio structure is used to reduce the speed of the lower rotating shaft, so that the moving touch plate slows down and moves upward slowly to fit the stationary touch plate.

3. A vacuum circuit breaker transmission mechanism according to claim 2, characterized in that: The top plate is arranged below the mounting plate; a vertically arranged rotating rack is fixed on the upper end of the top plate; the rotating rack and the mounting plate are slidably matched up and down; the rotating wheel is coaxially fixed on the matching shaft; the rotating wheel and the rotating rack are meshed for transmission.

4. A vacuum circuit breaker transmission mechanism according to claim 3, characterized in that: The large transmission ratio structure includes a first small wheel and a first large wheel; the first small wheel is an incomplete gear coaxially fixed on the lower rotating shaft; the teeth of the first small wheel are distributed in a fan shape around the lower rotating shaft; the first large wheel is a full gear coaxially fixed on the matching shaft; when in the open state, the first large wheel and the first small wheel are meshed; the diameter of the first small wheel is smaller than the diameter of the first large wheel.

5. A vacuum circuit breaker transmission mechanism according to claim 4, characterized in that: The small transmission ratio structure includes a second small wheel and a second large wheel; the second small wheel is a full gear coaxially fixed on the matching shaft; the second large wheel is an incomplete gear coaxially fixed on the lower rotating shaft; the teeth of the second large wheel are distributed in a sector shape around the lower rotating shaft; and the sum of the central angle of the sector of the tooth distribution of the second large wheel and the central angle of the sector of the tooth distribution of the first small wheel is 2π; when in the closed state, the second large wheel and the second small wheel are meshed; the diameter of the second small wheel is smaller than the diameter of the second large wheel.

6. A vacuum circuit breaker transmission mechanism according to claim 5, characterized in that: The driving structure includes a first rod, a second rod, and a driving motor; the first rod is located above the second rod; the first rod is tilted up and down, and the upper end is hinged to the lower end of the driving rod; the second rod is tilted up and down, and the upper end is hinged to the lower end of the first rod; the driving motor is fixed to the mounting shell through a cross plate; the output shaft of the driving motor is horizontally arranged and fixedly connected to the lower end of the second rod.

7. A vacuum circuit breaker transmission mechanism according to claim 6, characterized in that: The one-way structure comprises a one-way bearing; the outer ring of the one-way bearing is fixedly connected to the inner wall of the outer cylinder; and the inner ring of the one-way bearing is fixedly connected to the outer wall of the inner cylinder.

8. A vacuum circuit breaker transmission mechanism according to claim 1, characterized in that: The mounting shell is cylindrical; an annular groove is arranged on the inner side wall of the mounting shell; a sliding rod is fixed on the mounting plate; and the sliding rod and the annular groove are slidably matched.

9. A vacuum circuit breaker transmission mechanism according to any one of claims 1 to 8, characterized in that: Two lifting devices are symmetrically arranged with respect to the length direction of the moving touch plate.

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