Change-over switch
The modular design and sliding contact transfer switch solve the problems of complicated maintenance and waste of resources of traditional transfer switches, and achieve fast maintenance and low-cost circuit connection reliability.
Patent Information
- Application Number
- CN202510903538.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-01
- Publication Date
- 2025-09-19
AI Technical Summary
Existing mechanical transfer switches are complicated to repair and replace, connection circuits are prone to errors, maintenance costs are high, and traditional designs lead to waste of resources.
The transfer switch adopts a modular design and realizes quick maintenance through multiple sets of detachable unit shells. The moving contact is a sliding design and is equipped with a brush rod and brush head. The groove wheel is used to drive the toggle disk for cleaning, reducing wear and poor contact.
It realizes a fast and convenient maintenance process, reduces the difficulty and cost of maintenance, extends the service life, reduces resource waste, and improves conductivity and circuit reliability.
Smart Images
Figure CN120674263A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of power distribution switches, and more particularly to a transfer switch. Background Art
[0002] A transfer switch is an electrical component used to switch circuit connections, primarily controlling the transition between multiple power sources, loads, or circuits. It is widely used in industrial control, power systems, and automation equipment, enabling manual or automatic circuit switching to ensure power continuity or functional conversion.
[0003] A manually controlled mechanical transfer switch typically has multiple positions, each corresponding to a different circuit combination. Some devices may require frequent circuit switching, such as motor forward and reverse control, dual power supply switching, and switching between voltage and current test modes on test instruments like multimeters. Frequent use can increase the wear and tear of the transfer switch components, leading to problems such as delays and failures, necessitating prompt repair or replacement of the switch.
[0004] The vast majority of transfer switch failures are directly related to internal component wear and poor contact. These two issues account for over 70% of transfer switch failures. Current transfer switch designs are often highly integrated, requiring the complete disassembly of the switch for repair or replacement. Completely disassembling the switch requires dismantling numerous circuits, a significant effort. Furthermore, the complex circuitry presents not only a high risk of electric shock, but also makes it easy to make connection errors during transfer switch installation. Traditional transfer switches often require complete replacement when they fail, resulting in wasted resources and prohibitively high repair costs. Therefore, it is necessary to propose a transfer switch that addresses these issues. Summary of the Invention
[0005] In response to the problems existing in the prior art, the present invention aims to provide a transfer switch that addresses the complexities of repairing and replacing existing mechanical transfer switches, the proneness to errors in connecting the circuits, and the high cost of repair. This device eliminates the need to remove the circuits during repair and reduces repair costs through an optimized structural design.
[0006] In order to solve the above problems, the present invention adopts the following technical solutions: A transfer switch includes a protective shell, with a plurality of connection terminals symmetrically mounted on both sides of the protective shell, one end of each connection terminal being fixedly connected to a static contact, and a slot being formed through the static contact; and a prism being rotatably connected to the interior of the protective shell; The protective shell is slidably connected to a plurality of unit shells, the plurality of unit shells are in contact with each other in sequence, and the prism passes through all the unit shells. A circular cover is fixed inside the unit shells, a groove wheel is rotatably connected inside the circular cover, and the prism is engaged with the groove wheel; Two sliders and a third spring are symmetrically installed inside each unit shell. The slider is elastically connected to the inside of the unit shell through the corresponding third spring, and the slider contacts the corresponding groove wheel cylinder. Side arms are installed on both sides of the slider, and the end of the side arm is rotatably connected to the rotating shaft. A sleeve is fixed to the end of the rotating shaft. Moving contacts are installed on both sides of the sleeve, and the moving contacts contact the slots on the corresponding static contacts.
[0007] As a preferred solution of the present invention, one end of the protective shell is fixedly connected to the mainboard, the prism passes through and is rotatably connected to the mainboard, the knob is rotatably connected to the side of the mainboard, and one end of the prism is inserted into the inside of the mainboard.
[0008] As a preferred solution of the present invention, two screw holes are symmetrically provided inside the protective shell, and the wiring terminals are threadedly connected with wiring screws.
[0009] As a preferred solution of the present invention, a cylinder is fixed at the bottom of each static contact, a first spring is installed inside the cylinder, a sliding column passes through the cylinder, and the sliding column is elastically connected to the cylinder through the first spring, a brush rod is fixedly connected to the top of the sliding column, and the brush rod is located inside the corresponding slot, the bottom of the cylinder is rotatably connected to the first gear, and the sliding column passes through and is slidingly connected to the first gear, a first rack is provided near the first gear inside each unit shell, the first rack is meshed with the corresponding first gear, a collision column is fixed on the surface of the first rack, a second spring is sleeved on the collision column, and the collision column and the first rack are elastically connected to the inside of the unit shell through the second spring.
[0010] As a preferred solution of the present invention, a sealing plate is installed on one side of each of the unit shells, and the sealing plate on one side of each of the unit shells contacts the other side of another unit shell. A sealing plate is installed at the other end of the protective shell, and a toggle plate is fixed on the side of the groove wheel. The toggle plate is rotatably connected to the corresponding annular cover, and the prism passes through all the toggle plates, and a second rack is installed inside the unit shell near each rotating shaft.
[0011] As a preferred solution of the present invention, a lifting column is slidably connected inside the sleeve, the moving contacts on both sides of the sleeve are fixed to the corresponding two ends of the lifting column, a partition is fixedly connected to the middle of the lifting column, two fourth springs are sleeved on the lifting columns on both sides of the partition, and the lifting column is elastically connected to the sleeve through the fourth spring.
[0012] As a preferred solution of the present invention, a ratchet is fixedly connected to the rotating shaft, a gear ring is rotatably connected to the outside of the ratchet, the gear ring is meshed with the corresponding second rack, and a plurality of one-way pawls are rotatably connected to the inner side of the gear ring in a circular array, each of the one-way pawls is provided with a torsion spring, the one-way pawl is elastically connected to the inner side of the gear ring through the torsion spring, and the one-way pawl contacts the ratchet.
[0013] As a preferred solution of the present invention, four reciprocating plates are also slidably connected in the unit shell near each of the sleeves, a sixth spring is installed on the top surface of the reciprocating plate, a brush head is provided at the bottom of the reciprocating plate, the brush head abuts against the corresponding moving contact, and a collision block is fixedly connected to the side of the reciprocating plate, the collision block abuts against the corresponding protrusion.
[0014] Compared with the prior art, the advantages of the present invention are: 1. The present invention utilizes a modular design, including multiple sets of removable unit housings, to achieve rapid repairs, easy disassembly, and convenient inspection of the components within the unit housings. Compared to traditional repair methods, which require individually loosening wire screws, disconnecting wires, replacing the transfer switch, and then rewiring, the present invention significantly shortens repair time, reduces maintenance difficulty, and improves repair efficiency. Furthermore, repairs can be quickly completed by replacing a single component or a unit housing and its internal parts, eliminating the wasteful resource problem of replacing the entire transfer switch upon failure in traditional repairs, significantly reducing repair costs.
[0015] 2. The moving contact is a double-headed design that can slide within the sleeve and switches direction during the slider's lifting and lowering process. A brush rod and brush head are also provided inside the unit housing. The brush rod is located within the slot, and the brush head contacts the moving contact. The groove wheel drives the toggle disc to rotate, causing the toggle rod to slide vertically back and forth, thereby driving the brush rod to rotate within the slot. The brush head rubs back and forth against the surface of the moving contact, thereby removing particles or oxide layers in the slot and on the surface of the moving contact. This improves the conductivity between the stationary and moving contacts, as well as their service life, reduces the frequency of repair or replacement of the transfer switch, and further reduces subsequent maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the internal structure of the protective shell of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of the protective shell, prisms, sealing plate, etc. of the present invention; Figure 4 This is a schematic diagram of the internal planar cross-section structure of the protective shell of the present invention; Figure 5 For the present invention Figure 4 A in the middle is an enlarged structural diagram; Figure 6 Schematic diagram of the internal structure of the unit housing of the present invention; Figure 7 Schematic diagram of the knob and prism structure of the present invention; Figure 8 It is a schematic diagram of the cross-section structure of the static contact and the cylinder of the present invention; Figure 9 This is a schematic diagram of the cooperation between the toggle plate and the toggle lever and their transmission structure of the present invention; Figure 10 Schematic diagram of the internal structure of the sleeve of the present invention; Figure 11 Schematic diagram of the gear ring structure of the present invention.
[0017] Description of the numbers in the figure: 11. Mainboard; 12. Knob; 13. Prism; 21. Protective shell; 22. Screw hole; 23. Terminal block; 24. Terminal screw; 25. Static contact; 26. Slot; 31. Cylinder; 32. First spring; 33. Sliding column; 34. Brush rod; 35. Gear; 36. First rack; 37. Strike column; 38. Second spring; 41. Unit housing; 42. Closing plate; 43. Ring cover; 44. Toggle plate; 45. Grooved wheel; 46. Second rack; 51. Sliding column Block; 52, third spring; 53, side arm; 54, rotating shaft; 55, sleeve; 56, lifting column; 57, partition; 58, fourth spring; 59, moving contact; 61, ratchet; 62, gear ring; 63, one-way pawl; 64, torsion spring; 71, toggle lever; 72, fifth spring; 73, boss; 74, boss; 75, reciprocating plate; 76, sixth spring; 77, brush head; 78, bump; 81, moving ring; 82, positioning ring; 83, locking arm; 84, bolt. DETAILED DESCRIPTION
[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.
[0019] For example 1, please refer to Figures 1-11 As shown, the present invention discloses a transfer switch, comprising a protective shell 21, wherein a prism 13 is rotatably connected to the interior of the protective shell 21; A plurality of wiring terminals 23 are symmetrically mounted on both sides of the protective shell 21. One end of the wiring terminal 23 is fixedly connected to a static contact 25. A slot 26 is formed through the static contact 25. The protective shell 21 is slidably connected to a plurality of unit shells 41. The unit shells 41 are mutually opposed in sequence, and the prism 13 passes through all the unit shells 41. A circular cover 43 is fixed inside the unit shell 41. A groove wheel 45 is rotatably connected inside the circular cover 43. The prism 13 is engaged with the groove wheel 45. Two sliders 51 and third springs 52 are symmetrically installed inside each unit housing 41. The sliders 51 are elastically connected to the inside of the unit housing 41 through the corresponding third springs 52, and the sliders 51 abut against the cylindrical surface of the corresponding groove wheel 45. Side arms 53 are installed on both sides of the slider 51. The ends of the side arms 53 are rotatably connected to the rotating shaft 54. The end of the rotating shaft 54 is fixed with a sleeve 55. Moving contacts 59 are installed on both sides of the sleeve 55. The moving contacts 59 abut against the slots 26 on the corresponding static contacts 25.
[0020] One end of the protective shell 21 is fixedly connected to the mainboard 11 , the prism 13 passes through and is rotatably connected to the mainboard 11 , the knob 12 is rotatably connected to the side of the mainboard 11 , and one end of the prism 13 is inserted into the interior of the mainboard 11 .
[0021] Two screw holes 22 are symmetrically defined inside the protective shell 21 , and a wiring screw 24 is threadedly connected to the wiring terminal 23 .
[0022] A sealing plate 42 is installed on one side of each unit shell 41, and the sealing plate 42 on one side of each unit shell 41 contacts the other side of another unit shell 41. A sealing plate 42 is installed on the other end of the protective shell 21, and a toggle plate 44 is fixed to the side of the groove wheel 45. The toggle plate 44 is rotatably connected to the corresponding annular cover 43, and the prism 13 passes through all the toggle plates 44. A second rack 46 is installed inside the unit shell 41 near each rotating shaft 54.
[0023] A lifting column 56 is slidably connected inside the sleeve 55. The moving contacts 59 on both sides of the sleeve 55 are fixed to the two ends of the corresponding lifting columns 56. A partition 57 is fixedly connected to the middle of the lifting column 56. Two fourth springs 58 are sleeved on the lifting columns 56 on both sides of the partition 57. The lifting column 56 is elastically connected to the sleeve 55 through the fourth spring 58.
[0024] The prism 13 passes through the sealing plate 42 installed at the other end of the protective shell 21, and the prism 13 rotates relative to the sealing plate 42. The positioning ring 82 contacts the side of the unit shell 41 at the other end of the protective shell 21. The positioning ring 82 is internally connected to the dynamic ring 81 for rotation. The dynamic ring 81 is sleeved on the other end of the prism 13. The positioning ring 82 has two locking arms 83 symmetrically fixed on the cylindrical surface. Each locking arm 83 end is threadedly connected to a bolt 84, and the bolt 84 is threadedly connected to the corresponding screw hole 22.
[0025] The present invention is connected to a circuit. Each wire is connected to the corresponding wiring terminals 23 on both sides of the protective shell 21. The wiring screws 24 on the wiring terminals 23 are used to tighten the wires.
[0026] Each unit housing 41 has two symmetrical grooves on its groove wheel 45 that mate with the slider 51. Furthermore, the grooves of the groove wheel 45 in each unit housing 41 face different directions according to the circuit on / off logic. By turning the knob 12 on the mainboard 11, the knob 12 drives the prism 13 to rotate within the protective shell 21, thereby driving each groove wheel 45 to rotate. When the knob 12 is rotated to the corresponding gear position, the corresponding groove wheel 45 on the prism 13 rotates until the groove aligns with the corresponding slider 51. Under the elastic force of the third spring 52, the slider 51 immediately inserts into the corresponding groove. The displacement of the slider 51 drives the side arms 53 on both sides of it to move. The side arms 53 drive the movable contact 59 via the rotating shaft 54 and sleeve 55, causing the movable contact 59 to move into the slot 26 on the corresponding static contact 25, thereby electrically connecting to the circuit through the static contact 25 and the terminal block 23.
[0027] Attached to the instruction manual Figure 4 As shown, multiple removable unit housings 41 are installed inside the protective shell 21. The groove wheel 45, slider 51, movable contact 59 and other structures are integrated into the unit housing 41. Adjacent unit housings 41 are separated by a sealing plate 42 so as not to interfere with each other. The multiple unit housings 41 are fixed to the protective shell 21 by the sealing plate 42 installed at the end of the protective shell 21 and the bolts 84 threadedly connected to the internal thread of the protective shell 21. When the present invention is damaged or fails due to wear, there is no need to remove the circuit and protective shell 21 connected to the several terminal blocks 23. Just turn the knob 12 to the reset position first, and use the prism 13 to move each groove wheel 45 to a position where it does not cooperate with the corresponding slider 51, that is, the moving contact 59 in each unit shell 41 is no longer inserted into the corresponding slot 26, then unscrew the bolt 84, and then remove the locking arm 83 and the positioning ring 82 that abut the side of the sealing plate 42. When removing the positioning ring 82, the prism 13 can be brought out through the moving ring 81, and all the protective shells 21 inside the protective shell 21 can be pulled out through the prism 13. Finally, each unit shell 41 is separated one by one. The unit shell 41 is closed by the sealing plate 42 on one side and open on the other side. After separation, the internal components of the unit shell 41 can be clearly observed, thereby making it easy to repair or replace.
[0028] The present invention's modular design enables rapid repairs, facilitates disassembly, and facilitates inspection of internal components. Compared to traditional repair methods, which require individually loosening cable screws, disconnecting wiring, replacing the transfer switch, and then rewiring, the present invention significantly shortens repair time, reduces maintenance effort, and improves efficiency. Furthermore, repairs can be quickly completed by replacing a single component or module (a unit housing 41 and its internal components), eliminating the wasteful resource-intensive task of replacing the entire transfer switch upon failure in traditional repairs, significantly reducing repair costs.
[0029] As shown in the instruction manual 10, the lifting column 56 inside the sleeve 55 can slide up and down by means of the fourth spring 58. The presence of the fourth spring 58 makes the movable contacts 59 on both sides of the sleeve 55 have a tendency to slide toward the sides of the sleeve 55. And when the movable contacts 59 at the bottom of the sleeve 55 are inserted into the corresponding slots 26 (see the attached instructions), Figure 10 The fourth spring 58 provides sufficient thrust to make the moving contact 59 tightly contact the slot 26, thereby improving the electrical connection stability between the static contact 25 and the moving contact 59, and ensuring that even if wear occurs after long-term use, the static contact 25 and the moving contact 59 always have good power-on reliability.
[0030] Example 2: This example is an explanation based on Example 1. For details, please refer to Figures 1-11 A cylinder 31 is fixed to the bottom of each static contact 25, and a first spring 32 is installed inside the cylinder 31. A slide column 33 passes through the cylinder 31, and the slide column 33 is elastically connected to the cylinder 31 through the first spring 32. A brush rod 34 is fixed to the top of the slide column 33, and the brush rod 34 is inside the corresponding slot 26. The bottom of the cylinder 31 is rotatably connected to the first gear 35, and the slide column 33 passes through and is slidably connected to the first gear 35. A first rack 36 is provided near the first gear 35 inside each unit housing 41, and the first rack 36 is meshed with the corresponding first gear 35. A collision column 37 is fixed on the surface of the first rack 36, and a second spring 38 is sleeved on the collision column 37. The collision column 37 and the first rack 36 are elastically connected to the inside of the unit housing 41 through the second spring 38.
[0031] A ratchet 61 is fixedly connected to the rotating shaft 54, and a gear ring 62 is rotatably connected to the outside of the ratchet 61. The gear ring 62 is meshed with the corresponding second rack 46. A plurality of one-way pawls 63 are rotatably connected to the inner side of the gear ring 62 in a circular array. A torsion spring 64 is provided inside each one-way pawl 63. The one-way pawl 63 is elastically connected to the inner side of the gear ring 62 through the torsion spring 64, and the one-way pawl 63 contacts the ratchet 61.
[0032] Four toggle rods 71 and fifth springs 72 are symmetrically installed inside the unit shell 41. Each toggle rod 71 is elastically connected to the corresponding unit shell 41 through the corresponding fifth spring 72, and each toggle rod 71 passes through the annular cover 43 and contacts the toggle disk 44. The upper end side of the toggle rod 71 is fixedly connected to a convex column 73, and the bottom end side of the toggle rod 71 is fixedly connected to a protrusion 74, which contacts the corresponding collision column 37. Four reciprocating plates 75 are also slidably connected in the unit shell 41 near each sleeve 55. The top surface of the reciprocating plate 75 is installed with a sixth spring 76. A brush head 77 is provided at the bottom of the reciprocating plate 75, and the brush head 77 contacts the corresponding moving contact 59. A bump block 78 is fixedly connected to the side of the reciprocating plate 75, and the bump block 78 contacts the corresponding convex column 73.
[0033] Due to usage requirements, the conversion switch may require frequent rotation of the knob 12, resulting in frequent switching of the static contact 25 and the moving contact 59. When the static contact 25 and the moving contact 59 are frequently switched on and off, in addition to wear, an arc will also be generated, resulting in carbonization and unevenness inside the slot 26 and on the surface of the moving contact 59, thereby increasing resistance and reducing conductivity.
[0034] To this end, a rotatable shaft 54 is provided between the sleeve 55 and the side arm 53, and a gear ring 62 is provided on the shaft 54. When the groove wheel 45 is driven to rotate by the prism 13, the slider 51 originally in the groove of the groove wheel 45 moves to the cylindrical surface of the groove wheel 45. During this process, the slider 51 slides away from the groove wheel 45 (the slider is shown in the attached manual). Figure 4 Taking this as an example), the slider 51 compresses the corresponding third spring 52 while driving the rotating shaft 54 and the sleeve 55 to move through the side arm 53. The sleeve 55 drives the moving contact 59 away from the corresponding static contact 25. At the same time, the gear ring 62 on the rotating shaft 54 is driven by the corresponding second rack 46. The gear ring 62 rotates around the rotating shaft 54. The one-way pawl 63 inside the gear ring 62 contacts the ratchet 61, thereby driving the rotating shaft 54 to rotate together. The rotating shaft 54 then drives the moving contact 59 to reverse direction through the sleeve 55. As shown in the attached manual Figure 10 As shown, as the slider 51 moves away from the groove wheel 45, the second rack 46 engages with the corresponding gear ring 62, driving the movable contact 59 to reverse direction, causing the movable contact 59 on the top surface of the sleeve 55 to rotate to the bottom of the sleeve 55. Furthermore, when the slider 51 moves to its maximum distance, the movable contact 59 on the top of the sleeve 55 abuts against the corresponding brush head 77. The brush head 77 and the brush rod 34 (which is provided with bristles) are both made of tough steel wire.
[0035] By setting the gear ring 62 and the ratchet 61 to cooperate with each other, when the slider 51 drives the side arm 53 to move close to the groove wheel 45, the one-way pawl 63 in this direction rotates through the torsion spring 64 and is no longer restricted by the ratchet 61, causing the gear ring 62 to idle. That is, when the gear ring 62 is driven to rotate by the corresponding second rack 46, the gear ring 62 will not drive the rotating shaft 54 to rotate, and the moving contacts 59 on both sides of the sleeve 55 will not change direction.
[0036] The movable contact 59 at the top of the sleeve 55 is the movable contact 59 that abutted against the corresponding slot 26 when the power was last applied. After the circuit is disconnected, the movable contact 59 rotates to the top of the sleeve 55 and abuts against the corresponding brush head 77. Then, as the prism 13 drives the groove wheel 45 to rotate, the groove wheel 45 drives the dial 44 to rotate, and the dial 44 pushes the dial rod 71 to move upward (as shown in the appendix of the manual). Figure 9 As shown, the toggle lever 71 is reciprocated up and down by the elastic force of the fifth spring 72. During the raising and lowering process of the toggle lever 71, the boss 73 on the side of its upper end compresses the corresponding bumper 78. Under the elastic force of the sixth spring 76, the reciprocating plate 75 is driven to slide back and forth horizontally. The reciprocating plate 75 drives the brush head 77 to rub the surface of the moving contact 59, thereby removing particulate matter and the oxide layer on the surface of the moving contact 59, thereby reducing resistance and improving conductivity.
[0037] The moving contacts 59 are designed to be two opposite ones and can be reversed following the rotating shaft 54 and the sleeve 55. The first purpose is to reverse the used moving contact 59 (that is, the one that last conflicted with the corresponding slot 26) to the other end, so as to facilitate the brush head 77 to brush and remove surface particles and oxide layers in time; the second purpose is to ensure that the surface of the moving contact 59 that conflicts with the corresponding slot 26 each time is clean, thereby ensuring the reliability of the circuit connection.
[0038] A protrusion 74 is also fixed to the side surface of the lower end of the toggle rod 71, which squeezes the corresponding collision column 37 in the same way. Under the elastic force of the second spring 38, the collision column 37 drives the first rack 36 to reciprocate horizontally, thereby driving the gear 35 at the bottom of the cylinder 31 to rotate. The gear 35 drives the brush rod 34 to reciprocate inside the slot 26 through the sliding column 33, brushing the inner wall of the slot 26, which can also remove surface particles and oxide layers.
[0039] The slide column 33 and the brush rod 34 can slide in the cylinder 31 and the slot 26 through the first spring 32. When the moving contact 59 is inserted into the slot 26, the moving contact 59 can press the brush rod 34 into the cylinder 31 by squeezing the brush rod 34, and the slide column 33 slides to the outside of the cylinder 31; when the moving contact 59 is separated from the slot 26, under the elastic force of the first spring 32, the slide column 33 and the brush rod 34 are reset, and the brush rod 34 returns to the slot 26.
[0040] The toggle plate 44 is used to drive the toggle rod 71 to slide back and forth, drive the brush rod 34 to rotate back and forth and the brush head 77 to slide back and forth, and brush the surface of the slot 26 and the moving contact 59 respectively, thereby removing the carbonized particles or oxide layer on the surface of the slot 26 and the moving contact 59, thereby improving the conductivity between the static contact 25 and the moving contact 59, and also improving the service life of the static contact 25 and the moving contact 59, reducing the replacement frequency of the switching switch, and further reducing the subsequent maintenance cost.
[0041] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.
Claims
1. A transfer switch, comprising a protective shell (21), wherein a plurality of connection terminals (23) are symmetrically mounted on both sides of the protective shell (21), one end of each connection terminal (23) is fixedly connected to a stationary contact (25), and a slot (26) is formed through the stationary contact (25); Its characteristics are: The protective shell (21) is rotatably connected to a prism (13) inside; The protective shell (21) is internally connected to a plurality of unit shells (41) in a sliding manner, the plurality of unit shells (41) are in contact with each other in sequence, and the prism (13) passes through all the unit shells (41), a circular ring cover (43) is fixed in the unit shell (41), a groove wheel (45) is rotatably connected in the circular ring cover (43), and the prism (13) is engaged with the groove wheel (45); Two sliders (51) and third springs (52) are symmetrically installed inside each unit housing (41). The sliders (51) are elastically connected to the inside of the unit housing (41) through the corresponding third springs (52), and the sliders (51) abut against the cylindrical surface of the corresponding groove wheel (45). Side arms (53) are installed on both sides of the slider (51). The ends of the side arms (53) are rotatably connected to the rotating shaft (54). The ends of the rotating shaft (54) are fixed with a sleeve (55). Moving contacts (59) are installed on both sides of the sleeve (55). The moving contacts (59) abut against the slots (26) on the corresponding static contacts (25).
2. The transfer switch according to claim 1, wherein: One end of the protective shell (21) is fixedly connected to the main board (11), the prism (13) passes through and is rotatably connected to the main board (11), the knob (12) is rotatably connected to the side of the main board (11), and one end of the prism (13) is inserted into the interior of the main board (11).
3. The transfer switch according to claim 1, wherein: Two screw holes (22) are symmetrically provided inside the protective shell (21), and a wiring screw (24) is threadedly connected to the wiring terminal (23).
4. The transfer switch according to claim 3, wherein: A cylinder (31) is fixed at the bottom of each static contact (25), a first spring (32) is installed inside the cylinder (31), a slide column (33) passes through the cylinder (31), and the slide column (33) is elastically connected to the cylinder (31) through the first spring (32), a brush rod (34) is fixedly connected to the top of the slide column (33), and the brush rod (34) is located inside the corresponding slot (26), the bottom of the cylinder (31) is rotatably connected to the first gear (35), and the slide column (33) passes through and A first rack (36) is provided near the first gear (35) inside each unit housing (41) and is slidably connected to the first gear (35). The first rack (36) is meshedly connected to the corresponding first gear (35). A collision column (37) is fixed on the surface of the first rack (36). A second spring (38) is sleeved on the collision column (37). The collision column (37) and the first rack (36) are elastically connected to the inside of the unit housing (41) through the second spring (38).
5. The transfer switch according to claim 4, characterized in that: A sealing plate (42) is installed on one side of each unit shell (41), and the sealing plate (42) on one side of each unit shell (41) contacts the other side of another unit shell (41). A sealing plate (42) is installed on the other end of the protective shell (21). A toggle plate (44) is fixed on the side of the groove wheel (45), and the toggle plate (44) is rotatably connected to the corresponding annular cover (43). The prism (13) passes through all the toggle plates (44), and a second rack (46) is installed inside the unit shell (41) near each rotating shaft (54).
6. The transfer switch according to claim 5, characterized in that: The sleeve (55) is slidably connected to a lifting column (56) inside, the moving contacts (59) on both sides of the sleeve (55) are fixed to the two ends of the corresponding lifting columns (56), a partition (57) is fixedly connected to the middle of the lifting column (56), two fourth springs (58) are sleeved on the lifting columns (56) on both sides of the partition (57), and the lifting columns (56) are elastically connected to the sleeve (55) through the fourth springs (58).
7. The transfer switch according to claim 5, characterized in that: A ratchet (61) is fixedly connected to the rotating shaft (54), and a gear ring (62) is rotatably connected to the outside of the ratchet (61), and the gear ring (62) is meshed with the corresponding second rack (46); a plurality of one-way pawls (63) are rotatably connected to the inner side of the gear ring (62) in a circular array, and a torsion spring (64) is provided inside each one-way pawl (63). The one-way pawl (63) is elastically connected to the inner side of the gear ring (62) through the torsion spring (64), and the one-way pawl (63) contacts the ratchet (61).
8. The transfer switch according to claim 6, characterized in that: Four reciprocating plates (75) are also slidably connected in the unit housing (41) near each sleeve (55), and a brush head (77) is provided at the bottom of the reciprocating plate (75), and the brush head (77) abuts against the corresponding moving contact (59).