Moving contact and knife switch

Abstract

The utility model discloses a moving contact and a knife switch, the moving contact comprises at least one contact assembly, the contact assembly comprises an end plate, a brake blade and a plate spring, the brake blade is provided with a plurality of contact fingers at intervals along a first direction, the plate spring is provided with a plurality of elastic arms at intervals along the first direction, and the plurality of elastic arms are arranged in one-to-one correspondence with the plurality of contact fingers. The end plate is connected with the switch blade, and the plate spring is clamped between the end plate and the switch blade, so that each elastic arm elastically abuts against the corresponding contact finger. According to the technical scheme of the invention, each contact finger can be subjected to the same elastic force, so that the contact pressure between each contact finger and the contact piece of the static contact is ensured to be equal.

Description

Technical Field

[0001] The present application relates to the technical field of knife switch equipment, and in particular to a moving contact and a knife switch. Background Art

[0002] In the rail transit traction network power supply system, knife switches play an important role. They include isolating switches, grounding switches and other types of switches. The performance of the moving contacts in the knife switches directly affects the safety of the entire power supply system.

[0003] Flat copper busbars offer excellent electrical conductivity and a high current-carrying capacity. Therefore, in existing knife switches, copper busbars are often used to connect the blades of the moving contacts and the contact pieces of the stationary contacts. Due to the material properties of the flat copper busbars, springs are often required to maintain contact between the blades and the contact pieces.

[0004] In the related art, the moving contact is provided with multiple springs to elastically abut against the multiple contact fingers of the copper busbar, or a disc spring is provided to elastically abut against the copper busbar to provide elastic force for the switch blade so that the switch blade maintains contact with the contact piece. However, this can easily cause each contact finger to be subjected to unequal elastic force, resulting in unequal contact pressure between each contact finger and the contact piece, and even the phenomenon that some contact fingers are in contact with the contact piece, while some contact fingers have gaps with the contact piece, which seriously affects the safety of the power supply system. Utility Model Content

[0005] The main purpose of this application is to provide a moving contact, which aims to improve the problem that the moving contact of the existing knife switch elastically abuts against the copper bar through multiple springs or disc springs, which easily makes each contact finger receive unequal elastic forces, resulting in unequal contact pressure between each contact finger and the contact piece.

[0006] To achieve the above-mentioned purpose, the moving contact proposed in the present application is applied to a knife switch, and the moving contact includes at least one group of contact components, and the contact components include an end plate, a knife blade and a leaf spring. The knife blade is provided with a plurality of contact fingers spaced apart along a first direction, and the leaf spring is provided with a plurality of elastic arms spaced apart along the first direction. The plurality of elastic arms are respectively provided in one-to-one correspondence with the plurality of contact fingers. The end plate is connected to the knife blade, and the leaf spring is clamped between the end plate and the knife blade, so that each of the elastic arms elastically abuts against a corresponding contact finger.

[0007] In some embodiments of the present application, two groups of contact components are included, and the gate blades of one group of contact components are arranged toward the gate blades of the other group of contact components.

[0008] In some embodiments of the present application, the gate blade extends along a second direction perpendicular to the first direction, and the gate blade is provided with a plurality of contact fingers on both sides of the second direction; the leaf spring is provided with a plurality of elastic arms on both sides of the second direction, and the plurality of elastic arms on both sides of the leaf spring are respectively elastically abutted against the plurality of contact fingers on both sides of the gate blade;

[0009] The end plates of the two groups of contact assemblies are both rotatably connected to a static contact of the knife switch, and one side of the switch blades of the two groups of contact assemblies abuts against both sides of the static contact respectively.

[0010] In some embodiments of the present application, the leaf spring includes two elastic parts and a connecting part, the two elastic parts are respectively connected to the two sides of the connecting part, and both elastic parts are provided with a plurality of elastic arms, and the connecting part is connected to the gate blade and / or the end plate.

[0011] In some embodiments of the present application, each elastic arm is provided with a warped edge on a side away from the connecting portion, and the arc surface of the warped edge abuts against the contact finger.

[0012] In some embodiments of the present application, both groups of the contact components are provided with through holes penetrating the end plate, the connecting portion, and the gate blade;

[0013] The moving contact further includes a bolt, a copper sleeve and a nut. The bolt passes through the copper sleeve and the through holes on the two groups of contact components and is threadedly connected to the nut. The copper sleeve is clamped between the two groups of contact components.

[0014] In some embodiments of the present application, the static contact includes a terminal plate, the terminal plate is provided with a first connection hole, and the end plates of the two groups of contact assemblies are both provided with a second connection hole;

[0015] The moving contact also includes a rotating shaft and a sleeve, the sleeve is passed through the first connecting hole and the two second connecting holes, so that the two groups of contact components are rotatably connected to the terminal block, the rotating shaft is passed through the sleeve, and the rotating shaft is provided with two stop parts along its axial direction, and the two stop parts are also respectively spaced apart from the end plates of the two groups of contact components to limit the end plates from separating from the sleeve.

[0016] In some embodiments of the present application, each group of the contact components further includes a limiting ring, which is sleeved on the bolt and located between the end plate and the leaf spring;

[0017] The bolt is provided with a threaded portion threadedly connected to the nut, and a shoulder is provided on a side of the threaded portion close to the bolt head of the bolt, and the shoulder abuts against the end plate away from the bolt head.

[0018] In some embodiments of the present application, the end plate is provided with a rotation-stopping structure, the leaf spring and the connecting portion are both provided with a mating portion, and the rotation-stopping structure cooperates with the mating portion to limit the rotation of the leaf spring and the gate blade relative to the end plate.

[0019] In some embodiments of the present application, a stop boss is provided on one side of the end plate facing the leaf spring to form the stop structure, and a stop hole is provided in both the leaf spring and the connecting portion to form the mating portion, and the stop boss is plugged into and mated with the stop hole to limit the rotation of the leaf spring and the gate blade relative to the end plate.

[0020] The present application also proposes a knife switch, comprising a moving contact, a static contact and a drive assembly as described above; wherein, the contact assembly of the moving contact is movably arranged, and the drive assembly comprises a drive motor and a transmission assembly, and the drive motor is connected to the contact assembly through the transmission assembly to drive the multiple contact fingers of the contact assembly to contact or separate from the static contact respectively.

[0021] The movable contact provided by the embodiment of the present application is arranged with the above-mentioned structure, and each elastic arm on its leaf spring elastically abuts against a contact finger separately to provide elastic force for a contact finger, that is, the force applied to each contact finger is independent of each other and is not interfered with by other elastic arms or other contact fingers. In this way, each contact finger is subjected to the same elastic force, thereby ensuring that the contact pressure between each contact finger and the contact piece of the static contact is equal, avoiding the phenomenon that some contact fingers are in contact with the contact piece and some contact fingers have gaps with the contact piece, which improves the reliability of the knife switch and thus improves the safety of the power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 This is a structural diagram of an embodiment of a knife switch of the present application;

[0024] Figure 2 for Figure 1 Schematic diagram of the partial structure of the middle knife switch;

[0025] Figure 3 for Figure 1 Cross-sectional view of the moving contact;

[0026] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0027] Figure 5 for Figure 1 Another cross-sectional view of the moving contact;

[0028] Figure 6 for Figure 1 Exploded view of the moving contact;

[0029] Figure 7 1 is a structural schematic diagram of another embodiment of the moving contact;

[0030] Figure 8 This is an exploded view of part of the structure of the moving contact in 7;

[0031] Figure 9 1 is a structural diagram of another embodiment of the moving contact.

[0032] Description of Figure Numbers:

[0033] 100. Knife switch; 10. Moving contact; 11. Contact assembly; 111. End plate; 1111. Second connecting hole; 1112. Anti-rotation boss; 112. Switch blade; 1121. Contact finger; 1122. Anti-rotation hole; 113. Leaf spring; 1131. Elastic portion; 11311. Elastic arm; 11312. Warped edge; 1132. Connecting portion; 114. Limiting ring; 13. Bolt; 131. Shoulder; 132. Bolt head; 14. Copper sleeve; 15. Nut; 16. Rotating shaft; 161. Washer; 17. Bushing; 20. Static contact; 21. Terminal block; 211. First connecting hole; 22. Contact piece; 30. Drive assembly; 31. Drive motor; 32. Transmission assembly; 40. Mounting plate; X, first direction; Y, second direction.

[0034] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0038] The embodiment of the present application proposes a moving contact 10, which is applied to a knife switch 100. In the knife switch 100, a power source is connected to the moving contact 10 to drive the moving contact 10 to move, so that the moving contact 10 contacts or separates from a static contact 20. In order to improve the performance of the moving contact 10, the embodiment of the present application improves the moving contact 10. Figures 1 to 6 In an embodiment of the present application, the moving contact 10 includes at least one group of contact components 11 .

[0039] The contact assembly 11 includes an end plate 111, a blade 112, and a leaf spring 113. The blade 112 is provided with a plurality of contact fingers 1121 spaced apart along a first direction X. The leaf spring 113 is provided with a plurality of elastic arms 11311 spaced apart along the first direction X. The plurality of elastic arms 11311 are respectively provided in a one-to-one correspondence with the plurality of contact fingers 1121. The end plate 111 is connected to the blade 112, and the leaf spring 113 is clamped between the end plate 111 and the blade 112, so that each elastic arm 11311 elastically abuts against a corresponding contact finger 1121.

[0040] It should be noted that when the moving contact 10 is applied to the knife switch 100, the switch blade 112 is electrically connected to the wire. The wire can be directly welded to the switch blade 112 to establish an electrical connection, and the wire can also be electrically connected to the switch blade 112 through a terminal block 21 of a static contact 20.

[0041] The multiple contact fingers 1121 on the switch blade 112 are typically used to contact a stationary contact 20 to establish an electrical connection, or to separate from the stationary contact 20 to disconnect the electrical connection. Typically, the multiple contact fingers 1121 contact or separate from the contact piece 22 of the stationary contact 20. The multiple contact fingers 1121 are spaced apart along the first direction X, typically evenly spaced at a certain distance and arranged side by side. This is intended to reduce mutual interference between the contact fingers 1121 and improve the safety performance of the movable contact 10.

[0042] It should be emphasized that in the knife switch 100, the number of static contacts 20 can be two, and the above-mentioned terminal block 21 and contact piece 22 are not structures on the same static contact 20, but structures of different static contacts 20. Of course, in actual applications, the shapes and sizes of the above-mentioned terminal block 21 and contact piece 22 can be the same.

[0043] Similarly, multiple elastic arms 11311 are spaced apart along the first direction X, typically evenly spaced at a certain distance and arranged in parallel, such that one elastic arm 11311 corresponds to one contact finger 1121. When the end plate 111 and the gate blade 112 are assembled, the leaf spring 113 is clamped between the end plate 111 and the gate blade 112. The leaf spring 113 deforms under the mutual clamping of the end plate 111 and the gate blade 112, causing each elastic arm 11311 to deform, thereby storing elastic potential energy. Consequently, each elastic arm 11311 elastically abuts against a corresponding contact finger 1121, providing elastic force to the contact finger 1121.

[0044] The movable contact 10 provided in the embodiment of the present application is arranged with the above-mentioned structure, and each elastic arm 11311 on its leaf spring 113 elastically abuts against a contact finger 1121 individually, providing elastic force for a contact finger 1121, that is, the force applied to each contact finger 1121 is independent of each other and is not interfered with by other elastic arms 11311 or other contact fingers 1121. In this way, each contact finger 1121 is subjected to the same elastic force, thereby ensuring that the contact pressure between each contact finger 1121 and the contact piece 22 of the static contact 20 is equal, avoiding the phenomenon that some contact fingers 1121 are in contact with the contact piece 22 and some contact fingers 1121 have gaps with the contact piece 22, which improves the reliability of the knife switch 100 and thus improves the safety of the power supply system.

[0045] At the same time, the leaf spring 113 is provided with a plurality of elastic arms 11311 at intervals along the first direction X. The leaf spring 113 has a simple structure and can be manufactured using an integrated molding process. The leaf spring 113 can be a separate part. Compared with the prior art, multiple springs are used to elastically abut against multiple contact fingers 1121 respectively. In the moving contact 10 provided in the embodiment of the present application, only one part, the leaf spring 113, is required. This not only reduces the cost of the moving contact 10 but also makes installation more convenient.

[0046] It can be understood that when the moving contact 10 is applied to the knife switch 100, the moving contact 10 and the contact piece 22 of the static contact 20 are in contact with each other in the closed state, and the moving contact 10 and the contact piece 22 of the static contact 20 are separated from each other in the open state.

[0047] In some examples, such as Figures 2 to 7 As shown, the device comprises two sets of contact assemblies 11, with the blades 112 of one set of contact assemblies 11 positioned toward the blades 112 of the other set. This arrangement allows the blades 112 of the two sets of contact assemblies 11 to clamp the contact pieces 22 of the stationary contacts 20 using the elastic force of the leaf springs 113 when the moving contact 10 closes the stationary contacts 20, improving the stability of the moving contact 10 during closing. Furthermore, the addition of a blade 112 in contact with the contact piece 22 improves the current-carrying capacity of the moving contact 10.

[0048] In some examples, such as Figure 9 As shown, the moving contact 10 includes four, six, or other even-numbered groups of contact assemblies 11 , wherein two groups of contact assemblies 11 constitute a contact unit. In a contact unit, the gate blades 112 of one group of contact assemblies 11 are arranged toward the gate blades 112 of the other group of contact assemblies 11 .

[0049] In some examples, such as Figures 6 to 8 As shown, the blade 112 extends along a second direction Y perpendicular to the first direction X. A plurality of contact fingers 1121 are provided on both sides of the blade 112 in the second direction Y. The leaf spring 113 is provided with a plurality of elastic arms 11311 on both sides of the leaf spring 113 in the second direction Y. The elastic arms 11311 on both sides of the leaf spring 113 elastically abut against the plurality of contact fingers 1121 on both sides of the blade 112. The end plates 111 of both contact assemblies 11 are rotatably connected to a stationary contact 20 of the knife switch 100, such that one side of the blades 112 of the two contact assemblies 11 abut against both sides of the stationary contact 20.

[0050] In this example, in the knife switch 100 used for the moving contact 10, the number of static contacts 20 is two. For the convenience of explaining the knife switch 100, one of the two static contacts 20 is defined as the first static contact 20, and the other static contact 20 is defined as the second static contact 20. The end plates 111 of the two groups of contact assemblies 11 are both rotatably connected to the first static contact 20. When the knife switch 100 is closed, the moving contact 10 and the second static contact 20 are in contact with each other. When the knife switch 100 is opened, the moving contact 10 and the second static contact 20 are separated from each other.

[0051] With this arrangement, when installing the knife switch 100, the wire can establish an electrical connection with the blade 112 via the static contact 20, facilitating installation of the knife switch 100 and improving safety during live work. Furthermore, the blades 112 of the two contact assemblies 11 can utilize the elastic force of the leaf spring 113 to clamp the static contact 20, ensuring stability between the blades 112 and the static contact 20.

[0052] In some examples, such as Figures 6 to 8 As shown, the leaf spring 113 includes two elastic portions 1131 and a connecting portion 1132. The two elastic portions 1131 are respectively connected to the two sides of the connecting portion 1132. Both elastic portions 1131 are provided with a plurality of elastic arms 11311. The connecting portion 1132 is connected to the gate blade 112 and / or the end plate 111. This arrangement is intended to improve the stability of the leaf spring 113 sandwiched between the end plate 111 and the gate blade 112 by connecting the connecting portion 1132 to the gate blade 112 and / or the end plate 111, thereby preventing the leaf spring 113 from shifting due to external forces, which could cause the elastic arms 11311 to misalign with the contact fingers 1121.

[0053] It should be emphasized that the connecting portion 1132 is connected to the gate blade 112 and / or the end plate 111, so that the connecting portion 1132 and the gate blade 112 and / or the end plate 111 are relatively fixed, and the elastic portion 1131 is connected to one side of the connecting portion 1132, that is, the part where the elastic portion 1131 is connected to the connecting portion 1132 is also relatively fixed, and the elastic portion 1131 is provided with a plurality of elastic arms 11311, that is, one end of the elastic arm 11311 is relatively fixed, and when the elastic arm 11311 stores elastic potential energy or releases elastic potential energy, the other end of the elastic arm 11311 will slide relatively.

[0054] In some examples, such as Figure 4 and Figure 8 As shown, each spring arm 11311 has a warped edge 11312 on one side away from the connecting portion 1132, and the arc surface of the warped edge 11312 abuts against the contact finger 1121. This arrangement is intended to reduce friction between the spring arm 11311 and the gate blade 112 when storing or releasing elastic potential energy through the arc surface of the warped edge 11312 and the contact finger 1121.

[0055] In some examples, such as Figure 5 and Figure 6 As shown, both groups of contact components 11 are provided with through holes penetrating the end plate 111, the connecting portion 1132 and the switch blade 112; the moving contact 10 further includes a bolt 13, a copper sleeve 14 and a nut 15, the bolt 13 passes through the copper sleeve 14 and the through holes on the two groups of contact components 11 and is threadedly connected to the nut 15, and the copper sleeve 14 is clamped between the two groups of contact components 11.

[0056] In this arrangement, the two groups of contact components 11 are fixed together by the bolts 13, the copper sleeves 14 and the nuts 15, and the distance between the two groups of contact components 11 can be limited by the copper sleeves 14 to prevent the gate blades 112 of the two groups of contact components 11 from being too close, affecting the contact or separation between the gate blades 112 and the static contact 20.

[0057] It is understandable that when the moving contact 10 and the static contact 20 are in contact or separated from each other, the force on the leaf spring 113 will change, and this change may cause the force on the end plate 111 to change, causing the end plate 111 to deform slightly.

[0058] In some examples, such as Figures 3 to 6 As shown, the static contact 20 includes a terminal block 21, which is provided with a first connecting hole 211, and the end plates 111 of the two groups of contact components 11 are provided with second connecting holes 1111; the moving contact 10 also includes a rotating shaft 16 and a sleeve 17, the sleeve 17 is passed through the first connecting hole 211 and two second connecting holes 1111, so that the two groups of contact components 11 are rotatably connected to the terminal block 21, the rotating shaft 16 is passed through the sleeve 17, and the rotating shaft 16 is provided with two stop portions at intervals along its axial direction, and the two stop portions are also respectively spaced apart from the end plates 111 of the two groups of contact components 11 to limit the end plates 111 from separating from the sleeve 17.

[0059] With such arrangement, the stop portion of the rotating shaft 16 can limit the detachment of the end plate 111, thereby preventing the contact assembly 11 from detaching. At the same time, the two stop portions are spaced apart from the end plates 111 of the two groups of contact assemblies 11, respectively, and space is reserved between the stop portions and the end plates 111 for the end plates 111 to deform, which can effectively unload the force of the leaf spring 113 and ensure the smoothness of the relative rotation of the contact assembly 11.

[0060] In some examples, such as Figure 4 As shown, the length of the sleeve is greater than the distance between the outer sides of the two end plates 111. This arrangement is intended to prevent the hole wall of the second connecting hole 1111 from rubbing against the end surface of the sleeve 17 in the length direction, thereby preventing the second connecting hole 1111 from being damaged.

[0061] In some examples, the rotating shaft 16 is provided with two washers 161 , which are respectively in contact with the two end surfaces of the sleeve 17 in the length direction to form the above-mentioned stop parts, and the two washers 161 can rotate relative to the shaft body of the rotating shaft 16 .

[0062] In some examples, such as Figure 5As shown, each contact assembly 11 further includes a retaining ring 114, which is sleeved on the bolt 13 and located between the end plate 111 and the leaf spring 113. The bolt 13 has a threaded portion that is threadedly connected to the nut 15. The threaded portion is provided with a shoulder 131 on one side of the bolt 13 near the bolt head 132. The shoulder 131 abuts against the end plate 111 away from the bolt head 132.

[0063] This setting is intended to ensure the compression of the leaf spring 113 in the two groups of contact components 11 by limiting the gap between the end plate 111 and the leaf spring 113 through the limit ring 114, and limiting the gap between the end plate 111 and the other group of contact components 11 through the shaft shoulder 131. Among them, the nut 15 is restricted by the shaft shoulder 131 and the end plate 111, and the nut 15 cannot be further screwed into the bolt 13. In this way, the locking position of the nut 15 can be accurately determined. It is only necessary to tighten the nut 15 to ensure that the contact finger 1121 is subjected to sufficient elastic force. There is no need to strictly control the position of the nut 15, which greatly improves the production consistency and production and maintenance efficiency of the product.

[0064] In some examples, such as Figure 8 As shown, the end plate 111 is provided with a rotation-stopping structure, and both the leaf spring 113 and the connecting portion 1132 are provided with mating portions. The rotation-stopping structure cooperates with the mating portions to restrict the leaf spring 113 and the gate blade 112 from rotating relative to the end plate 111. With this arrangement, the movable contact 10 can connect the two sets of contact assemblies 11 together using a set of bolts 13, copper sleeves 14, and nuts 15, while ensuring that the leaf spring 113 and the gate blade 112 do not rotate relative to the end plate 111, thereby reducing the manufacturing cost of the movable contact 10.

[0065] Of course, in other examples, the moving contact 10 may include two sets of bolts 13 , copper sleeves 14 and nuts 15 to ensure that the leaf spring 113 and the gate blade 112 do not rotate relative to the end plate 111 .

[0066] In some examples, such as Figure 8 As shown, a stop boss 1112 is provided on one side of the end plate 111 facing the leaf spring 113 to form a stop structure, and a stop hole 1122 is provided in both the leaf spring 113 and the connecting portion 1132 to form a mating portion, and the stop boss 1112 is plugged into the stop hole 1122 to limit the rotation of the leaf spring 113 and the gate blade 112 relative to the end plate 111.

[0067] With such arrangement, the anti-rotation structure is simple, which facilitates the manufacture of the moving contact 10 , and the anti-rotation boss 1112 and the anti-rotation hole 1122 are easily plugged in and matched, which facilitates the assembly of the moving contact 10 .

[0068] Please refer to Figures 1 to 9The present application also proposes a knife switch 100, which includes a static contact 20, a drive assembly 30, and a moving contact 10. The specific structure of the moving contact 10 refers to the above embodiment. Since the present knife switch 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the contact assembly 11 of the moving contact 10 is movably arranged, and the drive assembly 30 includes a drive motor 31 and a transmission assembly 32. The drive motor 31 is connected to the contact assembly 11 through the transmission assembly 32 to drive the multiple contact fingers 1121 of the contact assembly 11 to contact or separate from the static contact 20 respectively.

[0069] It should be emphasized that the static contact 20 is usually fixed. Specifically, in some examples, the knife switch 100 includes a mounting plate 40, and the static contact 20 includes a contact piece 22. The contact piece 22 is usually indirectly mounted and fixed on the mounting plate 40 using insulating materials. Similarly, the above-mentioned terminal block 21 is also indirectly mounted and fixed on the mounting plate 40 using insulating materials.

[0070] Such a setting is intended to control the contact fingers 1121 of the moving contact 10 and the static contact 20 to contact or separate with each other by driving the motor 31, so as to reduce direct operation by staff, avoid unnecessary personal injury, and improve the safety of the power system.

[0071] Of course, in some other examples, the driving assembly 30 includes a handle, so that the handle is manually operated to drive the contact fingers 1121 of the moving contact 10 and the static contact 20 to contact or separate from each other.

[0072] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A moving contact, used in a knife switch, characterized in that: The invention comprises at least one group of contact components, wherein the contact components include an end plate, a gate blade and a leaf spring, the gate blade is provided with a plurality of contact fingers spaced apart along a first direction, the leaf spring is provided with a plurality of elastic arms spaced apart along the first direction, the plurality of elastic arms are respectively provided in one-to-one correspondence with the plurality of contact fingers, the end plate is connected to the gate blade, and the leaf spring is clamped between the end plate and the gate blade, so that each of the elastic arms elastically abuts against a corresponding contact finger.

2. The movable contact according to claim 1, characterized in that: Two groups of contact components are included, and the gate blades of one group of contact components are arranged toward the gate blades of the other group of contact components.

3. The movable contact according to claim 2, characterized in that: The gate blade extends along a second direction perpendicular to the first direction, and the gate blade is provided with a plurality of contact fingers on both sides of the second direction; the leaf spring is provided with a plurality of elastic arms on both sides of the second direction, and the plurality of elastic arms on both sides of the leaf spring are elastically in contact with the plurality of contact fingers on both sides of the gate blade respectively; The end plates of the two groups of contact assemblies are both rotatably connected to a static contact of the knife switch, and one side of the switch blades of the two groups of contact assemblies abuts against both sides of the static contact respectively.

4. The movable contact according to claim 3, characterized in that: The leaf spring includes two elastic parts and a connecting part. The two elastic parts are respectively connected to the two sides of the connecting part. Both elastic parts are provided with a plurality of elastic arms. The connecting part is connected to the gate blade and / or the end plate.

5. The movable contact according to claim 4, characterized in that: A warped edge is provided on one side of each elastic arm away from the connecting portion, and the arc surface of the warped edge abuts against the contact finger.

6. The movable contact according to claim 4, characterized in that: Both groups of contact components are provided with through holes penetrating the end plates, the connecting portions and the gate blades; The moving contact further includes a bolt, a copper sleeve and a nut. The bolt passes through the copper sleeve and the through holes on the two groups of contact components and is threadedly connected to the nut. The copper sleeve is clamped between the two groups of contact components.

7. The movable contact according to claim 6, characterized in that: The static contact comprises a terminal plate, the terminal plate is provided with a first connection hole, and the end plates of the two groups of contact assemblies are both provided with a second connection hole; The moving contact also includes a rotating shaft and a sleeve, the sleeve is passed through the first connecting hole and the two second connecting holes, so that the two groups of contact components are rotatably connected to the terminal block, the rotating shaft is passed through the sleeve, and the rotating shaft is provided with two stop parts along its axial direction, and the two stop parts are also respectively spaced apart from the end plates of the two groups of contact components to limit the end plates from separating from the sleeve.

8. The movable contact according to claim 6, characterized in that: Each group of the contact components further includes a limiting ring, which is sleeved on the bolt and located between the end plate and the leaf spring; The bolt is provided with a threaded portion threadedly connected to the nut, and a shoulder is provided on a side of the threaded portion close to the bolt head of the bolt, and the shoulder abuts against the end plate away from the bolt head.

9. The movable contact according to claim 6, characterized in that: The end plate is provided with a rotation-stopping structure, and the leaf spring and the connecting portion are both provided with a matching portion. The rotation-stopping structure cooperates with the matching portion to limit the leaf spring and the gate blade from rotating relative to the end plate.

10. The movable contact according to claim 9, characterized in that: The end plate is provided with a rotation-stop boss on one side facing the leaf spring to form the rotation-stop structure. The leaf spring and the connecting portion are both provided with rotation-stop holes to form the matching portion. The rotation-stop boss is plugged into and matched with the rotation-stop hole to limit the rotation of the leaf spring and the gate blade relative to the end plate.

11. A knife switch, characterized in that: It comprises a moving contact, a static contact and a drive assembly as described in any one of claims 1 to 10; wherein, the contact assembly of the moving contact is movably arranged, and the drive assembly comprises a drive motor and a transmission assembly, and the drive motor is connected to the contact assembly through the transmission assembly to drive the multiple contact fingers of the contact assembly to contact or separate from the static contact respectively.

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