Mechanical interlock device of contactor

Abstract

A mechanical interlock device for a contactor, comprising an interlock mechanism for interlocking two contactors, the two contactors being a first contactor and a second contactor respectively. Contact supports are respectively provided inside the first contactor and the second contactor, and interlock parts are respectively provided on the contact supports. The housing size of the second contactor is smaller than that of the first contactor. The mechanical interlock device further comprises a support member and a connecting member. The support member supports the second contactor from the bottom, so that the heights of the interlock parts on the contact supports in the two contactors are the same. The connecting member is connected between the support member and the first contactor and supports the interlock mechanism from the bottom. The interlock mechanism is located between the contact supports of the two contactors, and the interlock mechanism is respectively connected to the contact supports of the two contactors. When the contact support of any one contactor is closed, the interlock mechanism locks the other contactor so that its contact support cannot be closed, enabling the existing interlock mechanism for interlocking contactors with the same housing size to also achieve interlocking between two contactors with different housing sizes.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to a mechanical interlocking device for a contactor. Background Art

[0002] Reversible contactors are usually used to control high-power motors and are usually composed of two contactors. To avoid the simultaneous closing of the two contactors, a mechanical interlocking device is required to be connected between the two contactors to interlock the control rods of the two contactors. When one of the contactors is attracted, the other contactor can be locked through the mechanical interlocking device.

[0003] However, since the sizes of the two contactors are usually the same, the existing mechanical interlocking devices can usually only be used to interlock two contactors with the same size, and cannot interlock two contactors with different sizes. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a mechanical interlocking device for interlocking two contactors with different housing sizes.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A mechanical interlocking device for a contactor includes an interlocking mechanism for interlocking two contactors. The two contactors are a first contactor and a second contactor respectively. Contact support members are respectively provided inside the first contactor and the second contactor, and interlocking portions are respectively provided on the contact support members. The housing size of the second contactor is smaller than that of the first contactor. The mechanical interlocking device further includes a support member and a connecting member. The support member supports the second contactor from the bottom to make the heights of the interlocking portions on the contact support members in the two contactors the same. The connecting member is connected between the support member and the first contactor and supports the interlocking mechanism from the bottom. The interlocking mechanism is located between the contact support members of the two contactors and is respectively connected to the contact support members of the two contactors. When the contact support member of any one contactor is closed, the interlocking mechanism locks the other contactor to prevent its contact support member from closing.

[0007] Preferably, one end of the connecting member is provided with a limiting groove for limiting the interlocking mechanism, and limiting guide rails are respectively protruded outward on two opposite side surfaces of the connecting member. The length direction of the limiting guide rails is parallel to the depth direction of the limiting groove. The connecting member can be inserted between the two contactors along the length direction of the limiting guide rails, so that the limiting groove is sleeved on the interlocking mechanism for limiting, and the limiting guide rails on both sides of the connecting member are respectively inserted into the two contactors for limiting.

[0008] Preferably, installation buckles are respectively provided on both sides of the connecting member. When the connecting member is inserted between the two contactors, it is limited by the installation buckles on both sides with the first contactor and the second contactor respectively.

[0009] Preferably, the two contactors and the support are respectively provided with stoppers for connecting to the mounting rail, the top side of the support protrudes upward to form a mounting boss, the mounting boss is connected to the stopper of the second contactor, and the stopper of the support and the stopper of the first contactor are installed on the same mounting rail.

[0010] Preferably, the top side of the support member is connected to the second contactor, the bottom side of the support member has the same shape as that of the first contactor, and mounting holes for matching screws are respectively provided on the bottom sides of the support member and the first contactor.

[0011] Preferably, the cross-section of the limiting guide rail is a dovetail structure, the width of the limiting guide rail gradually increases in the direction away from the connecting member, and limiting guide grooves that are interference fit with the limiting guide rail are respectively provided on the sides of the support member and the two contactors.

[0012] Preferably, the connecting member is in a U-shaped structure, and the connecting member includes two oppositely arranged insertion plates, and a connecting plate connected between one ends of the two insertion plates, and a limiting groove for a limiting interlocking mechanism is formed between the other ends of the two insertion plates.

[0013] Preferably, the side surfaces of the two insertion plates are respectively provided with first limit guide rails for limiting the first contactor, the side surfaces of the first contactor are provided with two first guide rail grooves respectively cooperating with the first limit guide rails, the first limit guide rail can be inserted into the first guide rail grooves for limitation, and the side surfaces of the connecting plate are provided with two second limit guide rails respectively used for limiting the support member and the second contactor, the sides of the support member and the second contactor are respectively provided with third guide rail grooves and second guide rail grooves cooperating with the second limit guide rails, when the third guide rail groove and the second guide rail groove are located on the same straight line, the second limit guide rail is sequentially inserted into the third guide rail groove and the second guide rail groove for limitation.

[0014] Preferably, the two insertion plates are respectively L-shaped structures, and one end of the two insertion plates protrudes inward to form a supporting boss, and the two ends of the connecting plate are connected between the two supporting bosses. The height of the connecting plate is less than the height of the supporting boss, and a limiting groove for the sunken protrusion at the bottom of the limiting interlocking mechanism is formed between the top side of the connecting plate and the two supporting bosses. The top surfaces of the two supporting bosses are inclined upward in a direction away from each other to form a limiting surface, and the bottom of the limiting interlocking mechanism is provided with sunken surfaces matching the limiting surfaces on both sides of the sunken protrusion.

[0015] Preferably, one end of the bottom of the first contactor is provided with a first stopper and a first spring for limiting the first stopper on the first contactor. The other end of the bottom of the first contactor is provided with a first buckle disposed opposite to the first stopper. A first installation rail groove is formed between the first stopper and the first buckle. When the first installation rail groove is sleeved on the installation rail, the first stopper and the first buckle can be respectively limited to the installation rail from both sides;

[0016] The support member includes a bottom plate. The top side of the bottom plate is connected to the second contactor. One end of the bottom side of the bottom plate is provided with a third stopper and a third spring for limiting the third stopper. The other end of the bottom side of the bottom plate is provided with two third buckles respectively disposed opposite to the third stopper. A third installation rail groove is formed between the third stopper and the two third buckles. When the third installation rail groove is sleeved on the installation rail, the third stopper and the two third buckles can be respectively limited to the installation rail from both sides;

[0017] The widths of the first installation rail groove and the third installation rail groove are the same. When the first installation rail groove and the third installation rail groove are on the same straight line, they can be sleeved on the same installation rail for limiting.

[0018] Preferably, the contact supports of the first contactor and the second contactor respectively include a moving contact and a static contact for accessing the circuit. The moving contact is installed on its respective contact support, and the contact support can drive the moving contact thereon to contact and separate from the static contact; The interlock mechanism includes two symmetrically arranged interlock members, and the two interlock members are respectively connected to the contact supports of the first contactor and the second contactor. When the contact support of any one of the first contactor and the second contactor drives the moving contact to contact the static contact, it can drive the connected interlock member to block the other interlock member, so that the contact support connected to the blocked interlock member cannot drive the moving contact to contact the static contact.

[0019] The mechanical interlock device of the contactor of the present invention does not need to change the interlock mechanism of the contactors with the same existing interlock housing size. The installation mechanism respectively supports the contactor with a smaller housing size and the interlock mechanism from the bottom through the support member and the connecting member, and connects the support member to the contactor with a larger housing size through the connecting member, so that the interlock portion on the interlock mechanism and the contact supports in the two contactors is at the same height, enabling the existing interlock mechanism for contactors with the same interlock housing size to also achieve interlock between two contactors with different housing sizes, and having the characteristics of simple structure and low cost. In addition, the shape of the bottom side of the support member is the same as the shape of the bottom side of the first contactor, and the support member is provided with a stopper for connecting the installation rail, without changing the existing installation method of the reversible contactor. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the mechanical interlock device of the contactor according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the cooperation between the interlocking mechanism of the embodiment of the present invention and two contactors respectively;

[0022] Figure 3 It is a schematic diagram of the cooperation between the second contactor and the support member of the embodiment of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the interlocking mechanism of the embodiment of the present invention;

[0024] Figure 5 It is a cross-sectional view of the cooperation between the second contactor and the support member of the embodiment of the present invention;

[0025] Figure 6 It is a schematic top-side structural diagram of the support member of the embodiment of the present invention;

[0026] Figure 7 It is a schematic bottom-side structural diagram of the support member of the embodiment of the present invention;

[0027] Figure 8 It is an assembly schematic diagram of the connecting member of the embodiment of the present invention;

[0028] Figure 9 It is the embodiment of the present invention Figure 8 of the partial enlarged view;

[0029] Figure 10 It is a schematic structural diagram of the connecting member of the embodiment of the present invention. Detailed implementation manners

[0030] As Figures 1-4 shown, the mechanical interlocking device of the contactor of the present invention includes an installation mechanism and an interlocking mechanism 300. The interlocking mechanism 300 is used to interlock the contact supports of two contactors. The interlocking parts (not shown in the figure) for connecting the interlocking mechanism 300 are respectively arranged on the contact supports of the two contactors. The housing sizes of the two contactors are different. The installation mechanism includes a support member 100 and a connecting member 200. The support member 100 supports the contactor with a smaller housing size from the bottom, so that the heights of the interlocking parts on the contact supports in the two contactors are the same. The connecting member 200 is connected between the support member 100 and the contactor with a larger housing size, and supports the interlocking mechanism 300 from the bottom. The interlocking mechanism 300 is located between the contact supports of the two contactors. When the contact support of any one contactor is closed, the interlocking mechanism 300 locks the other contactor to prevent its contact support from closing.

[0031] The mechanical interlocking device of the contactor of the present invention does not require changing the interlocking mechanism 300 of the contactor with the same housing size as the existing one for interlocking. The installation mechanism supports the contactor with a smaller housing size and the interlocking mechanism 300 from the bottom through the support member 100 and the connecting member 200 respectively, and connects the support member 100 with the contactor with a larger housing size through the connecting member 200, so that the contact support in the interlocking mechanism 300 and the two contactors is at the same height, enabling the existing interlocking mechanism 300 for interlocking contactors with the same housing size to also achieve interlocking between two contactors with different housing sizes, which has the characteristics of simple structure and low cost. It can be understood that the interlocking mechanism 300 may not be for interlocking contactors with the same housing size, and may also be a structure adjusted for contactors with different housing sizes, all of which fall within the protection scope of the present invention.

[0032] The following combines the attached Figures 1 to 10 The given embodiments further illustrate the specific implementation manners of the mechanical interlocking device of the contactor of the present invention. The mechanical interlocking device of the contactor of the present invention is not limited to the descriptions of the following embodiments.

[0033] As Figures 1-4 shown, the interlocking mechanism 300 of this embodiment is used to interlock the first contactor A and the second contactor B. The contact supports of the first contactor A and the second contactor B respectively include a moving contact and a static contact (not shown in the figure) for accessing the circuit. The moving contact is installed on its respective contact support 320, and the contact support 320 can drive the moving contact thereon to contact and separate from the static contact.

[0034] The interlocking mechanism 300 includes two symmetrically arranged interlocking members 310. The two interlocking members 310 are respectively connected to the contact supports 320 of the first contactor A and the second contactor B. When the contact support 320 of either the first contactor A or the second contactor B drives the moving contact to contact the static contact, it can drive the connected interlocking member 310 to block the other interlocking member 310, so that the contact support 320 connected to the blocked interlocking member 310 cannot drive the moving contact to contact the static contact, ensuring that only one contactor is closed and the two contactors cannot be closed simultaneously. The interlocking part can be a groove or a protrusion for connecting the interlocking members 310. The interlocking members 310 can be directly connected to the contact support through this groove or protrusion. However, if the two contact supports are different, the two interlocking members 310 cannot be respectively connected to the two contact supports.

[0035] Generally, the second contactor B and the first contactor A are contactors of the same model with the same size. However, when the housing size of the second contactor B is smaller than that of the first contactor A, and the contact supports 320 of the first contactor A and the second contactor B are respectively located in the middle of their respective housings, if the interlocking parts on the two contact supports 320 are aligned at the same height position, the bottom of the housing of the second contactor B and the bottom of the interlocking mechanism 300 will both be suspended. By using the support member 100 and the connecting member 200 to support the second contactor B and the interlocking mechanism 300 from the bottom respectively, and making their bottoms be able to be located in the same plane as the bottom of the first contactor A, it is convenient to install and fix the two contactors as a whole.

[0036] As Figures 5-8 shown, the existing reversible contactor is clamped on the mounting rail (not shown in the figure) by a stopper or fixed by screws (not shown in the figure). The mounting mechanism of this embodiment will not change the mounting method of the existing reversible contactor.

[0037] The top side of the support member 100 is connected to the second contactor B. The shape of the bottom side of the support member 100 is the same as the shape of the bottom side of the first contactor A. Mounting holes 101 for cooperating with screws are respectively provided on the bottom sides of the support member 100 and the first contactor A. The screw can pass through the mounting hole 101 and then fix the bottom plate 103 and the first contactor A on the same plane, which has the characteristic of being convenient for installation.

[0038] Furthermore, stoppers for connecting to the mounting rail are respectively provided on the two contactors and the support member 100. An installation boss 102 is formed by the top side of the support member 100 protruding upward. The installation boss 102 is connected to the stopper of the second contactor B. The stoppers of the support member 100 and the first contactor A are installed on the same mounting rail.

[0039] Specifically, a first stopper 111 and a first spring (not shown in the figure) for limiting the first stopper 111 on the first contactor A are provided at one end of the bottom of the first contactor A. A first buckle 112 opposite to the first stopper 111 is provided at the other end of the bottom of the first contactor A. A first mounting rail groove 113 is formed between the first stopper 111 and the first buckle 112. When the first mounting rail groove 113 is sleeved on the mounting rail, the first stopper 111 and the first buckle 112 can respectively limit the mounting rail from both sides;

[0040] The support member 100 includes a bottom plate 103. The top side of the bottom plate 103 is connected to the second contactor B. One end of the bottom side of the bottom plate 103 is provided with a third stopper 131 and a third spring (not shown in the figure) for limiting the third stopper 131. The other end of the bottom side of the bottom plate 103 is provided with two third buckles 132 respectively arranged opposite to the third stopper 131. A third installation rail groove 133 is formed between the third stopper 131 and the two third buckles 132. When the third installation rail groove 133 is sleeved on the installation rail, the third stopper 131 and the two third buckles 132 can be respectively limited to the installation rail from both sides;

[0041] The widths of the first installation rail groove 113 and the third installation rail groove 133 are the same. When the first installation rail groove 113 and the third installation rail groove 133 are on the same straight line, they can be sleeved on the same installation rail for limiting.

[0042] One end of the bottom of the second contactor B is provided with a second stopper 121 and a second spring 123 for limiting the second stopper 121 on the second contactor B. The other end of the bottom of the second contactor B is provided with two second buckles 122 arranged opposite to the second stopper 121. The middle part of the bottom plate 103 protrudes upward to form an installation boss 102, and the installation boss 102 can be inserted between the second stopper 121 and the second buckles 122.

[0043] One side surface of the installation boss 102 is provided with a second card slot 1210 for cooperating with the second stopper 121. The other side surface of the installation boss 102 is provided with two first card slots 1220 respectively for cooperating with the two second buckles 122. The opening directions of the two first card slots 1220 are the same and opposite to the second card slot 1210.

[0044] The structures of the first stopper 111, the second stopper 121 and the third stopper 131 are basically the same, and all are used to connect the installation rail. The size of the second stopper 121 is slightly smaller than that of the first stopper 111 and the third stopper 131. The installation rail is often used in the power distribution cabinet to fix switch appliances such as contactors.

[0045] First, the inclined mounting boss 102 is inserted between the two second latches 122 and the second stopper 121. The two second latches 122 on one side of the mounting boss 102 are respectively inserted into the corresponding first card slots 1220 for limiting. Then, the second stopper 121 is pushed by the other side of the mounting boss 102 to compress the second spring 123. After the mounting boss 102 is completely inserted, the second stopper 121 is inserted into the second card slot 1210 for limiting under the push of the second spring 123. By fixing the mounting boss 102 and the second stopper 121, the connection with the bottom plate 103 can be achieved without changing the structure of the existing second contactor B. The middle part of the mounting boss 102 in this embodiment is a hollow structure, which separates the first card slot 1220 and the second card slot 1210 from each other, can reduce the weight and facilitate heat dissipation. Of course, the middle part of the mounting boss 102 can also be a solid structure, that is, the first card slot 1220 and the second card slot 1210 are integrated, and both belong to the protection scope of the present invention.

[0046] The bottom plate 103 protrudes upward to form a mounting boss 102 similar to the structure of a mounting rail. Without changing the structure of the second contactor B, the bottom plate 103 and the second contactor B can be assembled into one body. Moreover, the third stopper 131 at the bottom of the bottom plate 103 has the same height as the first stopper 111 at the bottom of the first contactor A. The two contactors are installed on the same mounting rail as a whole, and it will not affect the existing installation method fixed on the mounting rail.

[0047] Preferably, the inner contour of the first card slot 1220 fits the outer contour of the second latch 122, and the inner contour of the second card slot 1210 fits the outer contour of the second stopper 121. The connection line of the two second latches 122 and the second stopper 121 forms a triangle, which can limit the second contactor B more accurately and reliably.

[0048] Refer to Figures 8-10 Show the connection method of the connecting piece 200. One end of the connecting piece 200 is provided with a limiting groove 210 for limiting the interlocking mechanism 300. And on two opposite sides of the connecting piece 200, limiting guide rails 220 protrude outward respectively. The length direction of the limiting guide rails 220 is arranged parallel to the depth direction of the limiting groove 210. The connecting piece 200 can be vertically inserted between the first contactor A, the support piece 100 and the second contactor B along the length direction of the limiting guide rails 220, so that the limiting guide rails 220 on both sides of the connecting piece 200 are respectively inserted into the first contactor A and the second contactor B for limiting, and the limiting groove 210 is sleeved on both sides of the interlocking mechanism 300 for limiting.

[0049] Further, the cross-section of the limiting guide rail 220 is in a dovetail structure, and the width of the limiting guide rail 220 gradually increases in the direction away from the connecting member 200. Limiting guide grooves that are in interference fit with the limiting guide rail 220 are respectively provided on the sides of the support member 100 and the two contactors. The interference fit provides a more reliable limiting effect and a tighter connection. Of course, the cross-section of the limiting guide rail 220 can also be in a T-shaped or L-shaped structure, which all fall within the protection scope of the present invention.

[0050] Specifically, the connecting member 200 is in a U-shaped structure. The connecting member 200 includes two oppositely arranged insertion plates 211 and a connecting plate 212 connected between one ends of the two insertion plates 211. A limiting groove 210 for the limiting interlocking mechanism 300 is formed between the other ends of the two insertion plates 211. First limiting guide rails 221 for limiting the first contactor A are respectively provided on the sides of the two insertion plates 211. Two first guide grooves 2210 that are respectively matched with the first limiting guide rails 221 are provided on the side of the first contactor A. The first limiting guide rails 221 can be inserted into the first guide grooves 2210 for limiting. Two second limiting guide rails 222 for respectively limiting the bottom plate 103 and the second contactor B are provided on the side of the connecting plate 212. Third guide grooves 2221 and second guide grooves 2222 that are respectively matched with the second limiting guide rails 222 are provided on the sides of the bottom plate 103 and the second contactor B. When the third guide grooves 2221 and the second guide grooves 2222 are on the same straight line, the second limiting guide rails 222 are sequentially inserted into the third guide grooves 2221 and the second guide grooves 2222 for limiting.

[0051] The second limiting guide rails 222 are sequentially inserted into the third guide grooves 2221 and the second guide grooves 2222 for limiting, which can not only limit the bottom plate 103, but also limit the second contactor B at the same time, achieving a more reliable limiting effect. It can be understood that although only one side of the insertion plates 211 and the connecting plate 212 in this embodiment is provided with the limiting guide rail 220 and is only used for limiting one side, the limiting guide rail 220 can also be provided on both sides, which all fall within the protection scope of the present invention.

[0052] Further, the two insertion plates 211 are respectively in an L-shaped structure. One ends of the two insertion plates 211 respectively bulge inward to form support bosses 213. The two ends of the connecting plate 212 are connected between the two support bosses 213. The height of the connecting plate 212 is less than the height of the support bosses 213. A limiting groove 2140 for the bottom sinking protrusion 217 of the limiting interlocking mechanism 300 is formed between the top side of the connecting plate 212 and the two support bosses 213. The top surfaces of the two support bosses 213 are respectively inclined upward in the direction away from each other to form limiting surfaces 215. Sinking surfaces 216 that are respectively matched with the limiting surfaces 215 are provided on both sides of the bottom of the limiting interlocking mechanism 300 corresponding to the sinking protrusion 217.

[0053] As Figures 8-10 shown, mounting buckles are respectively provided on both sides of the connecting member 200. When the connecting member 200 is inserted between the two contactors, the mounting buckles on both sides can be driven to be respectively inserted into the first contactor A and the second contactor B for limiting, preventing the connecting member 200 from falling off. Of course, the connecting member 200 can also be limited by other structures, which all fall within the protection scope of the present invention.

[0054] Specifically, a second mounting buckle 224 cooperating with the second contactor B is provided on the connecting plate 212 corresponding to between the two second limiting guide rails 222, and a second mounting slot 2240 cooperating with the second mounting buckle 224 is provided on the side surface of the second contactor B. First mounting buckles 214 are respectively provided on one side of the two support bosses 213 away from the second mounting buckle 224, and a first mounting slot (not shown in the figure) cooperating with the first mounting buckle 214 is provided on the side surface of the first contactor A. When the connecting member 200 is inserted in place, the first mounting buckle 214 and the second mounting buckle 224 are respectively inserted into the first mounting slot and the second mounting slot 2240 for limiting.

[0055] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or replacements can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A mechanical interlocking device for a contactor, comprising an interlocking mechanism (300) for interlocking two contactors. Characterized in that: The two contactors are respectively a first contactor (A) and a second contactor (B). Contact support is respectively provided in the first contactor (A) and the second contactor (B), and interlocking parts are respectively provided on the contact supports. The housing size of the second contactor (B) is smaller than that of the first contactor (A). The mechanical interlocking device further comprises a support member (100) and a connecting member (200). The support member (100) supports the second contactor (B) from the bottom, so that the heights of the interlocking parts on the contact supports in the two contactors are the same. The connecting member (200) is connected between the support member (100) and the first contactor (A) and supports the interlocking mechanism (300) from the bottom. The interlocking mechanism (300) is located between the contact supports of the two contactors. The interlocking mechanism (300) is respectively connected to the contact supports of the two contactors. When the contact support of any one contactor is closed, the interlocking mechanism (300) locks the other contactor to prevent its contact support from closing. Stopping parts for connecting and installing rails are respectively provided on the two contactors and the support member (100). The support member (100) comprises a bottom plate (103). An installation boss (102) protrudes upward from the top side of the bottom plate (103). The installation boss (102) is connected to the stopping part of the second contactor (B). One end of the bottom side of the bottom plate (103) is provided with a third stopping part (131) and a third spring for limiting the third stopping part (131). The other end of the bottom side of the bottom plate (103) is provided with a third buckle (132) arranged opposite to the third stopping part (131). A third installation rail groove (133) is formed between the third stopping part (131) and the third buckle (132). When the third installation rail groove (133) is sleeved on the installation rail, the third stopping part (131) and the third buckle (132) can respectively limit the installation rail from both sides.

2. The mechanical interlocking device for a contactor according to claim 1, Characterized in that: One end of the connecting member (200) is provided with a limiting groove (210) for limiting the interlocking mechanism (300), and limiting guide rails (220) protrude outward from two opposite side surfaces of the connecting member (200). The length direction of the limiting guide rails (220) is arranged parallel to the depth direction of the limiting groove (210). The connecting member (200) can be inserted between the two contactors along the length direction of the limiting guide rails (220), so that the limiting groove (210) is sleeved on the interlocking mechanism (300) for limiting, and the limiting guide rails (220) on both sides of the connecting member (200) are respectively inserted into the two contactors for limiting.

3. The mechanical interlocking device for a contactor according to claim 2, Characterized in that: Installation buckles are respectively provided on both sides of the connecting member (200). When the connecting member (200) is inserted between the two contactors, it is limited by the installation buckles on both sides with the first contactor (A) and the second contactor (B) respectively.

4. The mechanical interlocking device for a contactor according to claim 1, It is characterized in that: One end of the bottom of the second contactor (B) is provided with a second stopper (121) and a second spring (123) for limiting the second stopper (121) on the second contactor (B). The other end of the bottom of the second contactor (B) is provided with two second buckles (122) arranged opposite to the second stopper (121). One side surface of the mounting boss (102) is provided with a second card slot (1210) for cooperating with the second stopper (121). On the other side surface of the mounting boss (102), there are two first card slots (1220) respectively cooperating with the two second buckles (122). The opening directions of the two first card slots (1220) are the same and opposite to the second card slot (1210). The two second buckles (122) on one side of the mounting boss (102) are respectively inserted into the corresponding first card slots (1220) for limiting, and the second stopper (121) is inserted into the second card slot (1210) for limiting under the push of the second spring (123).

5. The mechanical interlocking device of the contactor according to claim 1, It is characterized in that: The top side of the support member (100) is connected to the second contactor (B). The bottom side shape of the support member (100) is the same as the bottom side shape of the first contactor (A). Mounting holes (101) for cooperating with screws are respectively provided on the bottom sides of the support member (100) and the first contactor (A).

6. The mechanical interlocking device of the contactor according to claim 2, It is characterized in that: The cross-section of the limit guide rail (220) is in a dovetail structure. The width of the limit guide rail (220) gradually increases along the direction away from the connecting member (200). Limit guide grooves for interference fit with the limit guide rail (220) are respectively provided on the side surfaces of the support member (100) and the two contactors.

7. The mechanical interlocking device of the contactor according to claim 1, It is characterized in that: The connecting member (200) is in a U-shaped structure. The connecting member (200) includes two opposite insertion plates (211) and a connecting plate (212) connected between one ends of the two insertion plates (211). A limit groove (210) for limiting the interlocking mechanism (300) is formed between the other ends of the two insertion plates (211).

8. The mechanical interlocking device of the contactor according to claim 7, It is characterized in that: On the sides of the two insertion plates (211), first limiting guide rails (221) for limiting the first contactor (A) are respectively provided. On the side of the first contactor (A), two first guide grooves (2210) respectively cooperating with the first limiting guide rails (221) are provided. The first limiting guide rails (221) can be inserted into the first guide grooves (2210) for limiting. On the side of the connecting plate (212), two second limiting guide rails (222) for limiting the support member (100) and the second contactor (B) are respectively provided. On the sides of the support member (100) and the second contactor (B), a third guide groove (2221) and a second guide groove (2222) respectively cooperating with the second limiting guide rails (222) are provided. When the third guide groove (2221) and the second guide groove (2222) are on the same straight line, the second limiting guide rails (222) are sequentially inserted into the third guide groove (2221) and the second guide groove (2222) for limiting.

9. The mechanical interlocking device of the contactor according to claim 7, characterized in that: The two insertion plates (211) are respectively in an L-shaped structure. One ends of the two insertion plates (211) respectively bulge inward to form support bosses (213). The two ends of the connecting plate (212) are connected between the two support bosses (213). The height of the connecting plate (212) is less than the height of the support bosses (213). A limiting groove (2140) for limiting the bottom of the sinking boss (217) of the limiting interlocking mechanism (300) is formed between the top side of the connecting plate (212) and the two support bosses (213). The top surfaces of the two support bosses (213) are inclined upward in the direction away from each other to form limiting surfaces (215). On both sides of the sinking boss (217), the bottom of the limiting interlocking mechanism (300) is respectively provided with sinking surfaces (216) cooperating with the limiting surfaces (215).

10. The mechanical interlocking device of the contactor according to claim 1, characterized in that: One end of the bottom of the first contactor (A) is provided with a first stop member (111) and a first spring for limiting the first stop member (111) on the first contactor (A). The other end of the bottom of the first contactor (A) is provided with a first buckle (112) arranged opposite to the first stop member (111). A first installation rail groove (113) is formed between the first stop member (111) and the first buckle (112). When the first installation rail groove (113) is sleeved on the installation rail, the first stop member (111) and the first buckle (112) can respectively limit the installation rail from both sides; The widths of the first installation rail groove (113) and the third installation rail groove (133) are the same. When the first installation rail groove (113) and the third installation rail groove (133) are on the same straight line, they can be sleeved on the same installation rail for limiting.

11. The mechanical interlocking device of the contactor according to claim 1, characterized in that: The contact supports of the first contactor (A) and the second contactor (B) respectively include a moving contact and a stationary contact for accessing the circuit. The moving contact is mounted on its respective contact support (320), and the contact support (320) can drive the moving contact thereon to contact and separate from the stationary contact; the interlocking mechanism (300) includes two symmetrically arranged interlocking members (310), and the two interlocking members (310) are respectively connected to the contact supports (320) of the first contactor (A) and the second contactor (B). When the contact support (320) of either the first contactor (A) or the second contactor (B) drives the moving contact to contact the stationary contact, it can drive the connected interlocking member (310) to block the other interlocking member (310), so that the contact support (320) connected to the blocked interlocking member (310) cannot drive the moving contact to contact the stationary contact.

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