Connecting structure of moving contact

Abstract

According to the connecting structure of the moving contact, a contact support is connected with a cantilever on a main shaft through a connecting rod, the main shaft drives the moving contact to be in contact with or separated from a static contact through the contact support, the connecting rod is rotationally connected with the cantilever through a connecting piece, and the connecting piece comprises a first mounting part and a limiting part. The connecting rod and the cantilever are provided with a first connecting hole and a second connecting hole which are used for penetrating through the first mounting part respectively, the first mounting part is provided with a first boss and a second boss which are arranged in a protruding mode in the radial direction, and the hole wall of the first connecting hole is provided with a first groove capable of penetrating through the first boss. A second groove capable of penetrating through the first boss is formed in the hole wall of the second connecting hole, and the first boss penetrates through the first connecting hole and the second connecting hole and then is staggered with the first groove, so that the connecting rod and the cantilever are limited between the first boss and the limiting part in the axial direction of the first mounting part; the second groove of the cantilever sleeves the second boss and is in limiting fit with the connecting piece in the circumferential direction. The connecting piece has the advantage of being easy to assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low voltage apparatus, concretely relates to a connecting structure of moving contact. BACKGROUND

[0002] The isolating switch is usually used in the low voltage distribution system to realize the connection and disconnection of the circuit, and the isolating switch is mainly composed of an insulating shell, an operating mechanism and a contact system inside the insulating shell, and the working principle is that the operating mechanism drives the contact system to be connected and disconnected, thereby completing the closing and opening actions. Therefore, the connection between the operating mechanism and the contact system is very important. However, the number of parts connected between the existing operating mechanism and the contact system is large, which not only has a large assembly difficulty, but also is easy to be wrongly or omitted assembled, otherwise, the reliability is poor, and damage and falling off are easy to occur during work, thereby causing the operating mechanism to be unable to drive the contact system to be connected and disconnected. SUMMARY

[0003] The utility model aims at overcoming at least one defect of prior art, and provides a connecting structure of moving contact.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A connecting structure of moving contact, comprising a rotatingly arranged contact support, a moving contact installed on the contact support, and a main shaft connected with an operating mechanism, wherein a cantilever synchronously rotating with the main shaft is arranged on the main shaft, the contact support is connected with the cantilever through a connecting rod, and the operating mechanism can drive the main shaft to rotate, so that the main shaft drives the contact support to rotate, and the contact support drives the moving contact to contact and separate from a static contact,

[0006] One end of the connecting rod is rotationally connected with the contact support, and the other end of the connecting rod away from the contact support is rotationally connected with the cantilever through a connecting piece, and the cantilever drives the contact support to rotate through the connecting rod when the cantilever rotates with the main shaft,

[0007] The connecting piece comprises a first mounting portion arranged in parallel with the main shaft, and a limiting portion arranged on one side of the first mounting portion in the axial direction, the connecting rod and the cantilever are respectively provided with a first connecting hole and a second connecting hole for penetrating through the first mounting portion, the first mounting portion is provided with a first boss and a second boss arranged in the radial direction, the hole wall of the first connecting hole is provided with a first groove capable of penetrating through the first boss, and the hole wall of the second connecting hole is provided with a second groove capable of penetrating through the first boss,

[0008] The first mounting portion can drive the first boss to penetrate through the first connecting hole and the second connecting hole when the first boss is aligned with the first groove and the second groove, and the first boss is misaligned with the first groove after penetrating through the first connecting hole and the second connecting hole, so that the connecting rod and the cantilever are limited between the first boss and the limiting portion in the axial direction of the first mounting portion,

[0009] The second groove of the cantilever is sleeved on the second boss and circumferentially limited with the connecting piece, so that the connecting piece rotates with the cantilever.

[0010] Preferably, the main shaft can rotate between the main shaft closed position and the main shaft open position, and the first boss is always misaligned with the first groove when the main shaft is in the main shaft closed position, or in the main shaft open position, or rotates between the main shaft closed position and the main shaft open position.

[0011] Preferably, when the main shaft drives the moving contact and the stationary contact to the maximum distance, i.e. when the main shaft rotates to the main shaft open position, the angle α between the line connecting the center of the top of the first boss to the center of the first connecting hole and the line connecting the center of the bottom of the first groove to the center of the first connecting hole is greater than or equal to 15 degrees, when the main shaft rotates from the main shaft open position to the main shaft closed position, the first boss rotates in the direction of increasing the angle α, and when the main shaft rotates to the main shaft closed position, the angle α is less than 180 degrees.

[0012] Preferably, the connecting rod includes a first connecting part and a second connecting part for connecting with the contact support, the second connecting part includes two connecting plates connected with the first connecting part respectively, the two connecting plates are arranged in a spaced-apart manner, the cantilever can be inserted between the two connecting plates, the first connecting hole is arranged on each of the two connecting plates, and the second boss can pass through the connecting plate from the first groove and be inserted into the second groove of the cantilever between the two connecting plates.

[0013] Preferably, the distance between the first boss and the second boss, and the distance between the second boss and the limiting part, are both greater than the thickness of the second connecting part.

[0014] Preferably, the connecting rod is integrally formed, and the two connecting plates and the first connecting part are connected through a bending part.

[0015] Preferably, the two connecting plates are connected through a reinforcing part between the side edges.

[0016] Preferably, the angle between the line connecting the center of the bottom of the first groove to the center of the first connecting hole and the line connecting the center of the first connecting hole and the center of the third connecting hole is 47-87 degrees.

[0017] Preferably, the first connecting part is provided with a third connecting hole, and the second connecting piece rotates and connects the first connecting part with the contact support through the third connecting hole.

[0018] Preferably, the contact support is provided with a first connecting slot, a second connecting slot and a third connecting slot are respectively arranged on the opposite two side walls of the first connecting slot, the second connecting piece is arranged in the second connecting slot, one end of the connecting rod provided with the third connecting hole is inserted into the first connecting slot, and the second connecting piece can be inserted into the third connecting slot through the third connecting hole, so that the connecting rod is connected with the contact support through the second connecting piece.

[0019] Preferably, the second connecting piece comprises a second mounting portion and a positioning portion, the positioning portion is connected with the reset spring, one end of the connecting rod provided with the third connecting hole can be inserted into the second connecting slot, and the third connecting hole is aligned with the second connecting piece, the reset spring can drive the second connecting piece to move, so that the second mounting portion passes through the third connecting hole on the connecting rod in the second connecting slot, and the connecting rod is rotatably connected with the contact support through the second connecting piece.

[0020] Preferably, the cantilever is provided with a fourth connecting hole and a fifth connecting hole, the cantilever is sleeved on the main shaft through the fourth connecting hole, and the cantilever is fixedly connected with the main shaft, the fifth connecting hole is located on one side between the second connecting hole and the fifth connecting hole, the fifth connecting hole is connected with the operating mechanism through the driving shaft, the operating mechanism drives the main shaft to rotate through the driving shaft, and the second groove is located on the hole wall of the second connecting hole close to the fifth connecting hole.

[0021] Preferably, the included angle between the line connecting the center of the bottom of the second groove with the center of the second connecting hole and the line connecting the center of the second connecting hole with the center of the fourth connecting hole is 16-56 degrees.

[0022] Preferably, the first mounting portion of the connecting piece is in a cylindrical shape, the limiting portion is in a disc shape, one end of the first mounting portion is connected with the middle portion of the limiting portion, a first boss and a second boss protruding in the radial direction are respectively arranged on the side surface of the first mounting portion, the first boss is located at one end of the side surface of the first mounting portion away from the limiting portion, the second boss is located between the first boss and the limiting portion, the second boss is arranged in a spaced manner with the first boss and the limiting portion, and the line connecting the first boss and the second boss is arranged in parallel with the axis of the connecting piece.

[0023] The connecting structure of the movable contact of the utility model, the contact support is connected with the cantilever through the connecting rod, the connecting piece connects the connecting rod and the cantilever by penetrating the connecting rod and the cantilever, the first boss and the second boss are arranged on the connecting piece, the connecting rod and the cantilever are limited from two ends through the first boss and the limiting part, the second boss is matched with the second groove of the cantilever, the first boss is limited with the first groove, the connecting piece rotates with the cantilever, the connecting piece cannot rotate relative to the cantilever, the connecting piece can not rotate at will, the first mounting part falls off from the first connecting hole and the second connecting hole, the split pin or other parts are not needed to connect the connecting piece and the cantilever, because welding is not needed, not only the characteristic of less parts is possessed, but also the difficulty of assembly is reduced, the problems of wrong assembly and missing parts during assembly are prevented.

[0024] In addition, the first boss and the first groove are always misaligned when the main shaft is in the main shaft closing position, or in the main shaft opening and closing position, or rotates between the main shaft closing position and the main shaft opening position, the connecting piece can only rotate within the angle range of the main shaft closing position and the main shaft opening position under the driving of the cantilever, the connecting piece cannot be rotated to the angle that the first boss is aligned with the first groove, so that the connecting piece cannot fall off.

[0025] In addition, the integral connecting rod has higher strength and is not easy to bend and break, and the reinforcing part can further improve the strength of the connecting rod. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structure schematic view of the connecting structure of the movable contact of the utility model;

[0027] Figure 2 It is an exploded view of the connecting structure of the movable contact of the utility model;

[0028] Figure 3 It is a structure schematic view of the contact support of the utility model;

[0029] Figure 4 It is a structure schematic view of the connecting piece of the utility model;

[0030] Figure 5 It is a sectional view of the cooperation of the connecting rod, the connecting piece and the cantilever of the utility model;

[0031] Figure 6 It is a structure schematic view when the first boss is aligned with the first groove of the utility model;

[0032] Figure 7 It is a structure schematic view when the contact system is opened to the position of the utility model;

[0033] Figure 8 It is a structure schematic view when the contact system is closed to the position of the utility model; Figure 5

[0034] ​Figure 9 is the structure schematic diagram of the contact system closing to position of the utility model;

[0035] Figure 10 is the structure schematic diagram of the connecting rod of the utility model;

[0036] Figure 11 is the side view of the connecting rod of the utility model;

[0037] Figure 12 is the structure schematic diagram of the cantilever of the utility model;

[0038] Figure 13 is the side view of the cantilever of the utility model;

[0039] Figure 14 is the structure schematic diagram of the contact support and the second connecting piece of the utility model;

[0040] In the figure:

[0041] 1 moving contact 50 first connecting hole

[0042] 2 contact support 51 first connecting part

[0043] 3 main shaft 52 second connecting part

[0044] 4 cantilever 53 connecting plate

[0045] 5 connecting rod 54 bending part

[0046] 6 connecting piece 55 reinforcing part

[0047] 7 second connecting piece 56 third connecting hole

[0048] 21 support seat 61 mounting part

[0049] 22 side plate 62 limiting part

[0050] 23 first connecting groove 63 first boss

[0051] 24 second connecting groove 64 second boss

[0052] 25 third connecting groove 71 second mounting part

[0053] 41 second connecting hole 72 positioning part

[0054] 42 second recess 73 reset spring

[0055] 43 fourth connecting hole 501 first recess

[0056] 44 fifth connecting hole DETAILED DESCRIPTION

[0057] The following embodiments are further illustrated in the drawings to further illustrate the specific implementation of the connection structure of the movable contact of the utility model. The connection structure of the movable contact of the utility model is not limited to the description of the following embodiments.

[0058] The disconnecting switch of the embodiment comprises a protection mechanism, a driving mechanism, an operating mechanism and a plurality of contact systems, and a plurality of arc extinguishing mechanisms respectively arranged corresponding to the plurality of contact systems,

[0059] The plurality of contact systems respectively comprise a stationary contact, a movable contact 1 and a rotatably arranged contact support 2, the movable contact 1 is arranged on the contact support 2, the stationary contact and the movable contact 1 are respectively connected to a line, a main shaft 3 is arranged between the operating mechanism and the plurality of contact systems, the main shaft 3 is rotatably arranged, the main shaft 3 is provided with a cantilever 4 for driving the contact support 2 to rotate, the cantilever 4 is fixedly connected with the main shaft 3 and rotates synchronously with the main shaft 3, the driving mechanism can drive the main shaft 3 to rotate through the operating mechanism, so that the main shaft 3 drives the contact support 2 to rotate, and the movable contact 1 is driven by the contact support 2 to contact and separate from the stationary contact, so as to turn on and turn off the connected line, the protection mechanism is used for triggering the operating mechanism to trip and releasing a disconnecting spring when a fault occurs in the line, so that the disconnecting spring drives the contact support 2 to drive the movable contact 1 to separate from the stationary contact, so as to turn off the line and realize the protection function, the arc extinguishing mechanism is used for extinguishing the arc generated by the contact system, and the driving mechanism can be a handle for manual operation or an electric motor. The contact support 2 comprises a support seat 21 and two side plates 22 oppositely arranged on the support seat 21, a support shaft and a contact spring are arranged between the two side plates 22, the movable contact 1 is rotatably arranged on the support shaft, the contact spring is arranged between the movable contact 1 and the contact support 2, the movable contact 1 is pre-tightened and fixed on the contact support 2, and the contact spring is used for driving the movable contact 1 to press tightly with the stationary contact when the movable contact 1 contacts with the stationary contact. Of course, the main shaft 3 can be used for driving the contact support 2 of one contact system to rotate or the contact supports 2 of a plurality of contact systems to rotate.

[0060] As Figures 1-5An improved point of the embodiment is the connecting structure of the moving contact of the contact system. The contact support 2 is connected with the cantilever 4 through the connecting rod 5. One end of the connecting rod 5 is rotatably connected with the contact support 2. The end of the connecting rod 5 away from the contact support 2 is rotatably connected with the cantilever 4 through the connecting piece 6. When the cantilever 4 rotates with the main shaft 3, the contact support 2 is driven to rotate through the connecting rod 5. The connecting piece 6 comprises a first mounting portion 61 arranged in parallel with the main shaft 3 and a limiting portion 62 arranged on one axial side of the first mounting portion 61. The connecting rod 5 and the cantilever 4 are respectively provided with a first connecting hole 50 and a second connecting hole 41 for passing through the first mounting portion 61. The first mounting portion 61 is provided with a first boss 63 and a second boss 64 arranged in the radial direction. The hole wall of the first connecting hole 50 is provided with a first groove 501 capable of passing through the first boss 63. The hole wall of the second connecting hole 41 of the cantilever 4 is provided with a second groove 42 capable of passing through the first boss 63.

[0061] The first mounting portion 61 can drive the first boss 63 to pass through the first connecting hole 50 and the second connecting hole 41 when the first boss 63 is aligned with the first groove 501 and the second groove 42. After the first boss 63 passes through the first connecting hole 50 and the second connecting hole 41, the first mounting portion 61 drives the first boss 63 to be misaligned with the first groove 501, so that the connecting rod 5 and the cantilever 4 are limited in the axial direction of the first mounting portion 61 between the first boss 63 and the limiting portion 62, thereby connecting the connecting rod 5 and the cantilever 4.

[0062] The second groove 42 of the cantilever 4 is sleeved on the second boss 64 and limited in the circumferential direction with the connecting piece 6, so that the connecting piece 6 rotates with the cantilever 4. The connecting piece 6 cannot rotate relative to the cantilever 4 or can only rotate very slightly, for example, due to manufacturing errors or other reasons, there is a very small gap between the second boss 64 and the second groove 42. In this way, the connecting piece 6 can be prevented from rotating at will, which causes the first mounting portion 61 to fall off from the first connecting hole 50 and the second connecting hole 41. Preferably, the second groove 42 is completely matched or interference-fitted with the second boss 64.

[0063] The connecting structure of the movable contact of the embodiment, the contact support 2 is connected with the cantilever 4 through the connecting rod 5, the connecting piece 6 connects the connecting rod 5 and the cantilever 4 by penetrating the connecting rod 5 and the cantilever 4, the first boss 63 and the second boss 64 are arranged on the connecting piece 6, the connecting rod 5 and the cantilever 4 are limited from both ends by the first boss 63 and the limiting part 62, the connecting rod 5 and the cantilever 4 are connected, the second boss 64 cooperates with the second groove 42 of the cantilever 4, the first boss 63 is kept from being limited with the first groove 501, the connecting piece 6 rotates with the cantilever 4, the connecting piece 6 cannot rotate by itself relative to the cantilever 4, the connecting piece 6 can not be randomly rotated, the first mounting part 61 is prevented from falling off from the first connecting hole 50 and the second connecting hole 41, the open pin or other parts are not needed to connect the connecting piece 6 and the cantilever 4, because welding is not needed, not only the feature of less parts is possessed, but also the difficulty of assembly is reduced, and the problem of wrong assembly and missing parts during assembly is prevented.

[0064] The main shaft 3 can rotate between the main shaft closing position and the main shaft opening position under the driving of the operating mechanism, when the main shaft 3 rotates to the main shaft closing position, the movable contact 1 is driven by the contact support 2 to contact the static contact, so that the circuit breaker is closed; when the main shaft 3 rotates to the main shaft opening position, the main shaft 3 drives the movable contact 1 to separate from the static contact to the maximum distance, the contact support 2 drives the movable contact 1 to separate from the static contact, so that the circuit breaker is opened. Preferably, when the main shaft 3 is in the main shaft closing position, or in the opening position, or rotates between the main shaft closing position and the main shaft opening position, the first boss 63 is always misaligned with the first groove 501, the connecting piece 6 can only rotate within the angle range of the main shaft closing position and the main shaft opening position under the driving of the cantilever 4, so that the connecting piece 6 cannot be rotated to the angle at which the first boss 63 is aligned with the first groove 501, and the first boss 63 is prevented from being aligned with the first groove 501 to cause the connecting piece 6 to fall off by itself.

[0065] As shown in Figure 6 , when the main shaft 3 drives the first boss 63 to be aligned with the first groove 501, the line connecting the center of the top of the first boss 63 to the center of the first connecting hole 50 coincides with the line connecting the center of the bottom of the first groove 501 to the center of the first connecting hole 50;

[0066] As shown in Figures 7-8 , when the main shaft 3 drives the movable contact 1 to separate from the static contact to the maximum distance, that is, when the main shaft 3 rotates to the main shaft opening position, the angle between the line connecting the center of the top of the first boss 63 to the center of the first connecting hole 50 and the line connecting the center of the bottom of the first groove 501 to the center of the first connecting hole 50 is greater than or equal to 15 degrees;

[0067] As shown in Figure 9As shown, when the main shaft 3 rotates from the main shaft opening position to the main shaft closing position, the first boss 63 rotates in the direction of increasing the angle α, and when the main shaft 3 rotates to the main shaft closing position, i.e. when the movable contact 1 is brought into contact with the static contact by the main shaft 3, the angle α is less than 180 degrees, and in this embodiment, the angle α is about 103 degrees. Figure 9 When the main shaft 3 rotates from the main shaft closing position to the main shaft opening position in the reverse direction, and the movable contact 1 is separated from the static contact to the maximum distance, the main shaft 3 cannot continue to rotate, and the first boss 63 cannot pass the position with an angle of 15 degrees with the first groove 501, so that the first boss 63 and the first groove 501 are not aligned to cause the connector 6 to fall off.

[0068] After the circuit breaker is assembled, it is in the opening state, and the first boss 63 and the first groove 501 are locked in the misalignment state by the cantilever 4, and when the main shaft 3 drives the movable contact 1 to separate from the static contact to the maximum distance, it will not rotate to the angle at which the first boss 63 and the first groove 501 are aligned.

[0069] The assembly steps of this embodiment are as follows:

[0070] Step S1: align the second connecting hole 41 on the cantilever 4 with the first connecting hole 50 on the connecting rod 5;

[0071] Step S2: rotate the cantilever 4 by the main shaft 3 to align the second groove 42 on the cantilever 4 with the first groove 501 on the connecting rod 5;

[0072] Step S3: align the connector 6 with the first connecting hole 50, and align the first boss 63 on the connector 6 with the first groove 501;

[0073] Step S4: pass the connector 6 through the first connecting hole 50 and the connecting rod 5, pass the first boss 63 through the first groove 501 and the second groove 42, and insert the second boss 64 into the second groove 42 of the cantilever 4;

[0074] Step S5: rotate the cantilever 4 by the main shaft 3 to misalign the first boss 63 on the connector 6 with the first groove 501. Usually, the main shaft 3 drives the cantilever 4 to rotate to the main shaft opening position to misalign the first boss 63 on the connector 6 with the first groove 501.

[0075] Of course, the assembly steps also include the assembly steps of the connecting rod 5 and the contact support 2, which are not described here.

[0076] The assembly method of this embodiment does not require the use of split pins or other parts, nor does it require complex processes such as welding, and not only has the characteristics of fewer parts and lower assembly difficulty, but also facilitates automatic assembly design.

[0077] As shown in the figure, Figures 10-11As shown, the connecting rod 5 comprises a first connecting portion 51 and a second connecting portion 52, the first connecting portion 51 is provided with a third connecting hole 56, the second connecting member 7 passes through the third connecting hole 56 to rotatably connect the first connecting portion 51 with the contact support 2, the second connecting portion 52 comprises two connecting plates 53 connected with the first connecting portion 51 respectively, the two connecting plates 53 are oppositely arranged with a space, the cantilever 4 can be inserted between the two connecting plates 53, the first connecting hole 50 is arranged on the two connecting plates 53 respectively, the width and height of the second boss 64 are less than the width and depth of the first recess 501 respectively, the second boss 64 can pass through the connecting plate 53 from the first recess 501 and be inserted into the second recess 42 of the cantilever 4 between the two connecting plates 53. The cantilever 4 is inserted between the two connecting plates 53, which not only can keep balance on both sides of the cantilever 4, but also can limit the cantilever 4 from moving along the axial direction of the rotating shaft.

[0078] Preferably, the connecting rod 5 is integrally formed, the two connecting plates 53 are connected with the first connecting portion 51 through the bending portion 54, and the side edges of the two connecting plates 53 are connected through the reinforcing portion 55, the integrally formed connecting rod 5 has higher strength and is not easy to bend and break, and the reinforcing portion 55 can further improve the strength of the connecting rod 5. Of course, as other alternative embodiments, the connecting rod 5 can also be provided with only one second connecting portion 52, and the cantilever 4 is arranged on one side of the second connecting portion 52.

[0079] Preferably, the angle between the line connecting the center of the bottom of the first recess 501 with the center of the first connecting hole 50 and the line connecting the center of the first connecting hole 50 with the center of the third connecting hole 56 is 67 degrees. Of course, the angle can also be appropriately adjusted, for example, 47-87 degrees.

[0080] As shown in the figure, Figure 14 As shown, the contact support 2 is provided with a first connecting groove 23, the second connecting groove 24 and the third connecting groove 25 are arranged on the two opposite groove walls of the first connecting groove 23 respectively, the second connecting member 7 is arranged in the second connecting groove 24, one end of the connecting rod 5 provided with the third connecting hole 56 is inserted into the first connecting groove 23, and the second connecting member 7 can be inserted into the third connecting groove 25 after passing through the third connecting hole 56, so that the connecting rod 5 is connected with the contact support 2 through the second connecting member 7.

[0081] Furthermore, the second connector 7 includes a second mounting part 71 and a positioning part 72. The positioning part 72 is connected to a return spring 73. The return spring 73 is used to drive the second mounting part 71 through the first connecting groove 23 and into the third connecting groove 25. External force can be used by tools such as screwdrivers to drive the second connector 7 to move against the force of the return spring 73, so that the second mounting part 71 is away from the second connecting groove 23. The end of the connecting rod 5 with the third connecting hole 56 can be inserted into the second connecting groove 23 and the third connecting hole 56 is aligned with the second connector 7. After the external force disappears, the return spring 73 drives the second connector 7 to move, so that the second mounting part 71 passes through the third connecting hole 56 on the connecting rod 5 located in the second connecting groove 23, so that the connecting rod 5 is rotatably connected to the contact support 2 through the second connector 7. The connection of the second connector 7 by the return spring 73 can further reduce the assembly difficulty.

[0082] like Figures 12-13 As shown, the cantilever 4 is provided with a fourth connecting hole 43 and a fifth connecting hole 44. The cantilever 4 is sleeved on the main shaft 3 through the fourth connecting hole 43 and the cantilever 4 is welded and fixed to the main shaft 3. The fifth connecting hole 44 is located on one side between the second connecting hole 41 and the fifth connecting hole 44. The fifth connecting hole 44 is connected to the drive linkage of the operating mechanism through the drive shaft (not shown in the figure). The operating mechanism drives the main shaft 3 to rotate through the drive shaft. The second groove 42 is located on the hole wall of the second connecting hole 41 near the fifth connecting hole 44.

[0083] Preferably, the angle between the line connecting the bottom center of the second groove 42 to the center of the second connecting hole 41 and the line connecting the center of the second connecting hole 41 to the center of the fourth connecting hole 43 is 36 degrees. Of course, the angle can also be adjusted appropriately, for example, 16-56 degrees.

[0084] like Figure 4 As shown, the first mounting portion 61 of the connector 6 is cylindrical, and the limiting portion 62 is disc-shaped. One end of the first mounting portion 61 is connected to the middle of the limiting portion 62. A first boss 63 and a second boss 64 are respectively provided on the side of the first mounting portion 61, which protrude radially. The first boss 63 is located on the side of the first mounting portion 61 away from the limiting portion 62. The second boss 64 is located between the first boss 63 and the limiting portion 62. The second boss 64 is spaced apart from the first boss 63 and the limiting portion 62. The line connecting the first boss 63 and the second boss 64 is parallel to the axis of the connector 6. The distance between the first boss 63 and the second boss 64, and the distance between the second boss 64 and the limiting portion 62, are both greater than the thickness of the second connecting portion 52.

[0085] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used in use, and are only for the convenience of description, and do not indicate that the device or element referred to must have a particular orientation, so it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0086] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the scope of protection of the present application.

Claims

1. A connecting structure of a movable contact, comprising a contact support (2) arranged in rotation, a movable contact (1) mounted on the contact support (2), a main shaft (3) connected with an operating mechanism, the main shaft (3) being provided with a cantilever (4) rotating synchronously with the main shaft (3), the contact support (2) being connected with the cantilever (4) through a connecting rod (5), the operating mechanism being capable of driving the main shaft (3) to rotate, so that the main shaft (3) drives the contact support (2) to rotate, and the movable contact (1) is driven by the contact support (2) to contact and separate from a static contact, one end of the connecting rod (5) is rotationally connected with the contact support (2), and the other end of the connecting rod (5) away from the contact support (2) is rotationally connected with the cantilever (4) through a connecting piece (6), and the cantilever (4) drives the contact support (2) to rotate through the connecting rod (5) when the cantilever (4) rotates with the main shaft (3), the connecting piece (6) comprises a first mounting portion (61) arranged in parallel with the main shaft (3) and a limiting portion (62) arranged on one axial side of the first mounting portion (61), the connecting rod (5) and the cantilever (4) are respectively provided with a first connecting hole (50) and a second connecting hole (41) for passing through the first mounting portion (61), the first mounting portion (61) is provided with a first boss (63) and a second boss (64) arranged in radial direction, a hole wall of the first connecting hole (50) is provided with a first groove (501) capable of passing through the first boss (63), and a hole wall of the second connecting hole (41) is provided with a second groove (42) capable of passing through the first boss (63), the first mounting portion (61) is capable of driving the first boss (63) to pass through the first connecting hole (50) and the second connecting hole (41) when the first boss (63) is aligned with the first groove (501) and the second groove (42), the first boss (63) is dislocated with the first groove (501) after passing through the first connecting hole (50) and the second connecting hole (41), so that the connecting rod (5) and the cantilever (4) are limited in the axial direction of the first mounting portion (61) between the first boss (63) and the limiting portion (62), the second groove (42) of the cantilever (4) is sleeved on the second boss (64) to limit the connecting piece (6) in the circumferential direction, so that the connecting piece (6) rotates with the cantilever (4), the main shaft (3) is capable of rotating between a main shaft closing position and a main shaft opening position, the first boss (63) is always dislocated with the first groove (501) when the main shaft (3) is in the main shaft closing position, or in the main shaft opening position, or rotates between the main shaft closing position and the main shaft opening position. characterized in that ​ ​ ​ ​ 2. The connection structure of the movable contact according to claim 1, characterized in that: ​ 3. The connection structure of the movable contact according to claim 2, characterized in that: When the main shaft (3) drives the movable contact (1) to separate from the fixed contact to the maximum distance, i.e. the main shaft (3) rotates to the main shaft opening position, the angle α between the line connecting the center of the top of the first boss (63) to the center of the first connecting hole (50) and the line connecting the center of the bottom of the first groove (501) to the center of the first connecting hole (50) is greater than or equal to 15 degrees, when the main shaft (3) rotates from the main shaft opening position to the main shaft closing position, the first boss (63) rotates in the direction of increasing the angle α, and when the main shaft (3) rotates to the main shaft closing position, the angle α is less than 180 degrees.

4. The connection structure of the movable contact according to claim 1, characterized by: The connecting rod (5) comprises a first connecting part (51) and a second connecting part (52) for connecting with the contact support (2), the second connecting part (52) comprises two connecting plates (53) connected with the first connecting part (51) respectively, the two connecting plates (53) are arranged in a spaced-apart manner, the cantilever (4) can be inserted between the two connecting plates (53), and the first connecting hole (50) is arranged on each of the two connecting plates (53), the second boss (64) can pass through the connecting plate (53) from the first groove (501) and be inserted into the second groove (42) of the cantilever (4) between the two connecting plates (53).

5. The connection structure of the movable contact according to claim 4, characterized in that: The distance between the first boss (63) and the second boss (64) and the distance between the second boss (64) and the limiting part (62) are both greater than the thickness of the second connecting part (52).

6. The connection structure of the movable contact according to claim 4, characterized by: The connecting rod (5) is integrally formed, and the two connecting plates (53) and the first connecting part (51) are connected through a bending part (54).

7. The connection structure of the movable contact according to claim 4, characterized by: The two connecting plates (53) are connected through a reinforcing part (55) between the side edges.

8. The connection structure of the movable contact according to claim 4, characterized by: The angle between the line connecting the center of the bottom of the first groove (501) to the center of the first connecting hole (50) and the line connecting the center of the first connecting hole (50) and the center of the third connecting hole (56) is 47-87 degrees.

9. The connection structure of the movable contact according to claim 4, characterized by: The first connecting part (51) is provided with a third connecting hole (56), and the second connecting part (7) passes through the third connecting hole (56) to rotatably connect the first connecting part (51) with the contact support (2).

10. The connection structure of the movable contact according to claim 9, characterized in that: The contact support (2) is provided with a first connecting groove (23), the second connecting groove (24) and the third connecting groove (25) are arranged on the groove walls opposite to each other in the first connecting groove (23), the second connecting part (7) is arranged in the second connecting groove (24), one end of the connecting rod (5) provided with the third connecting hole (56) is inserted into the first connecting groove (23), and the second connecting part (7) can be inserted into the third connecting groove (25) after passing through the third connecting hole (56), so that the connecting rod (5) is connected with the contact support (2) through the second connecting part (7).

11. The connection structure of the movable contact according to claim 10, characterized by: The second connecting piece (7) comprises a second mounting part (71) and a positioning part (72), the positioning part (72) is connected with a reset spring (73), one end of the connecting rod (5) provided with a third connecting hole (56) can be inserted into the second connecting groove (23), and the third connecting hole (56) is aligned with the second connecting piece (7), the reset spring (73) can drive the second connecting piece (7) to move, so that the second mounting part (71) passes through the third connecting hole (56) on the connecting rod (5) in the second connecting groove (23), and the connecting rod (5) is rotatably connected with the contact support (2) through the second connecting piece (7).

12. The connection structure of the movable contact according to claim 1, characterized by: The cantilever (4) is provided with a fourth connecting hole (43) and a fifth connecting hole (44), the cantilever (4) is sleeved on the main shaft (3) through the fourth connecting hole (43), and the cantilever (4) is fixedly connected with the main shaft (3), the fifth connecting hole (44) is located on one side between the second connecting hole (41) and the fifth connecting hole (44), the fifth connecting hole (44) is connected with the operating mechanism through the driving shaft, the operating mechanism drives the main shaft (3) to rotate through the driving shaft, and the second groove (42) is located on the hole wall of the second connecting hole (41) close to the fifth connecting hole (44).

13. The connection structure of the movable contact according to claim 12, characterized by: The included angle between the line connecting the center of the bottom of the second groove (42) to the center of the second connecting hole (41) and the line connecting the center of the second connecting hole (41) to the center of the fourth connecting hole (43) is 16-56 degrees.

14. The connection structure of the movable contact according to claim 1, characterized by: The first mounting part (61) of the connecting piece (6) is in a cylindrical shape, the limiting part (62) is in a disc shape, one end of the first mounting part (61) is connected with the middle part of the limiting part (62), the first mounting part (61) is provided with a first boss (63) and a second boss (64) protruding in the radial direction on the side surface, respectively, the first boss (63) is located at one end of the side surface of the first mounting part (61) away from the limiting part (62), the second boss (64) is located between the first boss (63) and the limiting part (62), the second boss (64) is spaced apart from the first boss (63) and the limiting part (62), respectively, and the line connecting the first boss (63) and the second boss (64) is parallel to the axis of the connecting piece (6).

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