Contact support structure of moving contact of circuit breaker

Abstract

The utility model relates to the technical field of low-voltage electric appliances, in particular to a moving contact supporting structure of a circuit breaker. Comprising a contact support, a plurality of contact springs and a plurality of contact pieces. A shaft passes through the contact piece and fixes the contact piece above the contact support; one end of each contact spring is located in the contact support, the other end of each contact spring is in contact with the contact pieces, the contact springs and the contact support form an elastic structure, and each contact piece and at least two contact springs are correspondingly arranged; the shell is fixed on the contact support to limit the shaft, so that the contact spring and the whole circuit breaker are prevented from losing efficacy due to the fact that the contact spring is inclined in the mounting process of the moving contact, the contact spring can be accurately arranged in place in the mounting process, the moving contact is prevented from being easily damaged, the service life of the whole circuit breaker is prolonged, and the service life of the whole circuit breaker is prolonged. Moreover, the installation difficulty of the moving contact in the moving contact structure of the circuit breaker is further reduced, and the maintenance, repair and adjustment of the whole structure are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a contact supporting structure for a moving contact of a circuit breaker. Background Art

[0002] Universal circuit breaker is a low-voltage electrical equipment component with large capacity. It is frequently used in various electrical systems. It can ensure the connection and disconnection of the circuit under rated load, and automatically disconnect the circuit in abnormal circuit conditions such as overload, short circuit, undervoltage, etc. It can also completely isolate the load from the power supply by separating the moving and static contacts.

[0003] The moving contact of the universal circuit breaker belongs to the circuit breaker contact system, which is fixed in the base and can be rotated to realize the closing and opening of the circuit breaker. The moving contact is connected to the operating mechanism through a connecting rod. One end of the connecting rod is assembled in the shaft supported by the moving contact, and the other end is connected to the cantilever of the operating mechanism through a shaft. The length of the connecting rod determines the contact pressure and the size of the overtravel. The connecting rod belongs to the moving contact assembly. After the moving contact assembly is assembled, it is assembled in the cavity of the front base. The static contact assembly is assembled in the rear base assembly. After the front base assembly and the rear base assembly are assembled, the front base and the rear base are assembled into a body. Then the operating mechanism is assembled on the body, and the moving contact is connected to the operating mechanism through a connecting rod. During the installation process of the moving contact, the contact spring is more likely to be skewed, resulting in the contact spring being more likely to fail, causing the entire circuit breaker to fail; during the installation process, it is also more likely that the contact spring is not installed in place, making the moving contact more likely to be damaged, reducing the service life of the entire circuit breaker. When wear affects the contact pressure and overtravel, the contact overtravel distance cannot be observed intuitively, or there is a problem with the contact support and replacement is required. The moving contact assembly needs to be disassembled and disassembled before the moving contact can be replaced. The disassembled contact support is damaged and cannot be used again. Utility Model Content

[0004] The purpose of the utility model is to provide a moving contact support structure of a circuit breaker in view of the defects existing in the prior art, so that the contact spring will not be skewed during the installation of the moving contact, resulting in failure of the contact spring and the entire circuit breaker, and the contact spring can be accurately positioned during the installation process, so that the moving contact will not be easily damaged, thereby improving the service life of the entire circuit breaker, and further reducing the installation difficulty of the moving contact in the moving contact structure of the circuit breaker, facilitating the maintenance, repair and adjustment of the entire structure.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a contact support structure of a moving contact of a circuit breaker, comprising a contact support and a plurality of contact springs and a contact piece; a shaft passes through the contact piece and fixes the contact piece above the contact support; one end of the contact spring is located in the contact support, and the other end is in contact with the contact piece, the contact spring and the contact support form an elastic structure, and each contact piece and at least two contact springs are correspondingly arranged; a shell is fixed on the contact support to limit the shaft.

[0006] Furthermore, the contact support is provided with two rows of positioning holes, the positioning holes are used to place the contact springs, and the positioning holes correspond to the contact springs one by one and are positioned and matched.

[0007] Furthermore, a plurality of observation holes are respectively arranged on both sides of the contact support, and the observation holes are used to observe the state of the contact spring.

[0008] Furthermore, a skylight is provided at the front of the contact support for observing contact pressure and overtravel, and a small hole is provided at the bottom of the middle hole of the positioning hole to communicate with the skylight.

[0009] Furthermore, contact support grooves are provided on both sides of the contact support, contact support through holes are provided inside the contact support grooves, and the contact support through holes are used to install the shaft.

[0010] Furthermore, a rod is provided, the rod comprising an upper column, a lower column and a lower boss, the upper column and the lower column being larger at the top and smaller at the bottom, wherein the upper end face of the upper column contacts and cooperates with the contact sheet, the lower end face of the upper column cooperates with the upper end face of the contact spring, the lower column cooperates with the contact support through hole, the lower boss is provided with a lower boss through hole, the lower boss through hole can make the lower boss elastically deform when passing through the small hole, so that the rod is clamped with the contact support and the rod is not easy to fall off during installation, and when the contact spring is compressed, the lower column passes through the small hole and the lower boss telescopes in the skylight.

[0011] Furthermore, two contact sheet grooves are provided at the lower end of the contact sheet, and the contact sheet corresponds to and is positioned with the contact spring through the contact sheet grooves.

[0012] Furthermore, a contact sheet through hole is provided in the middle of the contact sheet, the contact sheet through hole matches with the shaft, and the shaft passes through the contact sheet through hole in sequence and fixes the contact sheet on the contact support.

[0013] Furthermore, a circular groove is provided inside the shell, and the circular groove cooperates with the shaft to limit the shaft; a circular hole and a square hole are also provided in the shell and cooperate with the first contact support protrusion and the second contact support protrusion to fix the shell, and form a snap connection with the contact support to fix the shell on the contact support.

[0014] Furthermore, a plurality of spacers are arranged inside the contact support for positioning the contact pieces and partially isolating adjacent contact pieces.

[0015] It works by combining contact supports, springs, contact sheets, shafts, shells, and rods. The contact spring is installed on the contact support, the rod passes through the spring and is arranged on the upper part of the spring, the contact piece is arranged on the upper part of the contact spring, and corresponds to the contact spring one by one. The shaft passes through the contact piece in turn to fix the contact piece directly on the contact support, and the shell is directly clamped on the contact support to limit the shaft. There is a skylight in the front of the contact support and three square holes on the side. During the assembly process, the square holes can be used to directly see whether the spring is assembled correctly, whether it is skewed, and whether it is in the groove. The rod is clamped on the contact support. When the contact piece is subjected to force, the spring and the telescopic rod will be compressed to move downward. The telescopic rod is extended and retracted downward. The pressure of the contact piece can be intuitively observed in the skylight, and the overtravel of the moving contact can also be intuitively observed, so that the contact spring will not be skewed during the installation of the moving contact, causing the contact spring and the entire circuit breaker to fail. The contact spring can also be accurately placed during the installation process, so that the moving contact will not be easily damaged, thereby improving the service life of the entire circuit breaker, and further reducing the installation difficulty of the moving contact in the moving contact structure of the circuit breaker, which is convenient for the maintenance, repair and adjustment of the entire structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of a contact support structure of a moving contact of a circuit breaker of the utility model;

[0018] Figure 2 A schematic diagram of a contact support structure of a moving contact of a circuit breaker of the utility model;

[0019] Figure 3 A schematic diagram of a contact support structure of a moving contact of a circuit breaker of the utility model;

[0020] Figure 4A schematic diagram of a contact support structure of a moving contact of a circuit breaker of the utility model;

[0021] Figure 5 This is a schematic diagram of the contact piece structure of a moving contact support structure of a circuit breaker of the utility model;

[0022] Figure 6 This is a schematic diagram of a contact support structure shell structure of a moving contact of a circuit breaker of the utility model;

[0023] Figure 7 A schematic diagram of a structure of a movable contact support structure rod of a circuit breaker of the utility model;

[0024] Reference numerals:

[0025] Contact support 1, positioning hole 1-1, observation hole 1-2, skylight 1-3, small hole 1-4, contact support groove 1-5, contact support through hole 1-6, first contact support protrusion 1-7, second contact support protrusion 1-8, spacer 1-9, contact spring 2, contact piece 3, contact piece groove 3-1, contact piece through hole 3-2, shaft 4, shell 5, circular groove 5-1, shell circular hole 5-2, shell square hole 5-3, rod 6, upper cylinder 6-1, lower end face 6-2, lower cylinder 6-3, through hole 6-4, lower cylinder 6-5. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] In the description of the present invention, it should be noted that the directions or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0028] A moving contact support structure of a circuit breaker, such as Figure 1 , 4As shown, it includes a contact support 1 and a plurality of contact springs 2 and a contact piece 3; a shaft 4 passes through the contact piece 3 and fixes the contact piece 3 above the contact support 1; one end of the contact spring 2 is located in the contact support 1, and the other end is in contact with the contact piece 3, the contact spring 2 and the contact support 1 form an elastic structure, and each of the contact pieces 3 and at least two of the contact springs 2 are correspondingly arranged; a shell 5 is fixed on the contact support 1 to limit the shaft 4.

[0029] Specifically, the invention comprises a contact support 1 and a plurality of contact springs 2 and contact pieces 3; a shaft 4 passes through the contact piece 3 and fixes the contact piece 3 above the contact support 1; one end of the contact spring 2 is located in the contact support 1, and the other end contacts the contact piece 3; the contact spring 2 and the contact support 1 form an elastic structure, and each of the contact pieces 3 and at least two contact springs 2 are arranged correspondingly; a shell 5 is fixed on the contact support 1 to limit the shaft 4, so that the contact spring 2 will not be skewed during the installation of the moving contact, thereby preventing the contact spring from failing and causing the entire circuit breaker to fail. During the installation process, the contact spring 2 can also be installed accurately, so that the moving contact will not be easily damaged, resulting in a reduction in the service life of the entire circuit breaker, and further reducing the difficulty of installing the moving contact in the moving contact structure of the circuit breaker, which is convenient for maintenance, repair and adjustment of the entire structure.

[0030] As a preferred embodiment of the above, Figure 4 As shown, the contact support 1 is provided with two rows of positioning holes 1 - 1 , and the positioning holes 1 - 1 are used to place the contact springs 2 , and the positioning holes 1 - 1 correspond to the contact springs 2 one by one and are positioned and matched.

[0031] Specifically, the contact support 1 is provided with two rows of positioning holes 1-1, and the positioning holes 1-1 are used to place the contact springs 2, and the positioning holes 1-1 correspond to the contact springs 2 one by one and are positioned and matched, so that the contact springs 2 can be accurately positioned during the installation of the moving contact, so that the circuit breaker will not fail or be damaged due to skewness or failure to be in place, and the difficulty of installing the moving contact in the moving contact structure of the circuit breaker is further reduced, which facilitates the maintenance, repair and adjustment of the entire structure.

[0032] As a preferred embodiment of the above, Figure 4 As shown, a plurality of observation holes 1-2 are respectively arranged on both sides of the contact support 1, and the observation holes 1-2 are used to observe the state of the contact spring.

[0033] Specifically, a plurality of observation holes 1-2 are provided on both sides of the contact support 1, and the observation holes 1-2 are used to observe the state of the contact spring, so that during the assembly process, it can be directly seen through the observation holes 1-2 whether the contact spring 2 is assembled correctly, whether it is skewed, and whether it is in the groove.

[0034] As a preferred embodiment of the above, Figure 4 As shown, the front of the contact support 1 is provided with a skylight 1-3 for observing the contact pressure and overtravel, and the bottom of the middle hole of the positioning hole 1-1 is provided with a small hole 1-4 connected to the skylight 1-3.

[0035] As a preferred embodiment of the above, Figure 4 As shown, contact support grooves 1-5 are provided on both sides of the contact support 1, and contact support through holes 1-6 are provided inside the contact support grooves 1-5. The contact support through holes 1-6 are used to install the shaft 4.

[0036] Specifically, contact support grooves 1-5 are provided on both sides of the contact support 1, and contact support through holes 1-6 are provided inside the contact support grooves 1-5. The contact support through holes 1-6 are used to install the structure of the shaft 4, so as to directly install the contact piece 3 on the contact support 1 through the shaft 4. This structure replaces the installation of the clamping plate, which is convenient for assembling and disassembling the moving contact. The screw-free installation causes damage to the contact support 1. The contact support 1 can be reused, which reduces the cost and further reduces the installation difficulty of the moving contact in the circuit breaker moving contact structure, which is convenient for maintenance, repair and adjustment of the entire structure.

[0037] As a preferred embodiment of the above, Figure 7 As shown, a rod 6 is also provided, and the rod 6 includes an upper column 6-1, a lower column 6-3 and a lower boss 6-5, the upper column 6-1 and the lower column 6-3 are larger at the top and smaller at the bottom, wherein the upper end surface of the upper column 6-1 contacts and cooperates with the contact sheet 3, the lower end surface 6-2 of the upper column 6-1 cooperates with the upper end surface of the contact spring 2, the lower column 6-3 cooperates with the contact support through hole 1-6, and the lower boss 6-5 is provided with a lower boss through hole 6-4, and the lower boss through hole 6-4 can make the lower boss 6-5 elastically deform when passing through the small hole 1-4, so that the rod 6 is clamped with the contact support 1, and the rod 6 is not easy to fall off during installation, and when the contact spring 2 is compressed, the lower column 6-3 passes through the small hole 1-4, and the lower boss 6-5 retracts and contracts in the skylight 1-3.

[0038] Specifically, a skylight 1-3 is provided at the front of the contact support 1 for observing the contact pressure and overtravel, a small hole 1-4 is provided at the bottom of the middle hole of the positioning hole 1-1 to communicate with the skylight 1-3, and a rod 6 is also provided, the rod 6 is divided into an upper column 6-1 and a lower column 6-3, the upper column 6-1 and the lower column 6-3 are larger at the top and smaller at the bottom, wherein the upper end surface of the upper column 6-1 contacts and cooperates with the contact piece 3, the lower end surface 6-2 of the upper column 6-1 cooperates with the upper end surface of the contact spring 2, the lower column 6-3 cooperates with the contact support through hole 1-6, the lower boss 6-5 is provided with a lower boss through hole 6-4, and the lower boss through hole 6-4 can make the When the lower boss 6-5 passes through the small hole 1-4, it undergoes elastic deformation, so that the rod 6 is snap-fitted with the contact support 1, and the rod 6 is not easy to fall off during installation. When the contact spring 2 is compressed, the lower column 6-3 passes through the small hole 1-4, and the lower boss 6-5 is telescopic in the skylight 1-3. When the contact piece 3 is subjected to force, the contact spring 2 and the rod 6 are compressed to move downward, and the rod 6 is telescoped downward. By observing the lower boss 6-5 at the position of the skylight 1-3, the pressure of the contact piece can be intuitively observed, and the overtravel of the moving contact can also be intuitively observed. At the same time, the installation difficulty of the moving contact in the moving contact structure of the circuit breaker is further reduced, which is convenient for maintenance, repair and adjustment of the entire structure.

[0039] As a preferred embodiment of the above, Figure 5 As shown, two contact sheet grooves 3 - 1 are provided at the lower end of the contact sheet 3 , and the contact sheet 3 corresponds to and is positioned with the contact spring 2 through the contact sheet grooves 3 - 1 .

[0040] Specifically, two contact piece grooves 3-1 are provided at the lower end of the contact piece 3. The contact piece 3 corresponds to the contact spring 2 one by one and is positioned and matched through the contact piece grooves 3-1, so as to cooperate with the positioning hole 1-1 to further ensure that the contact spring 2 can be accurately positioned during the installation of the moving contact, so that the circuit breaker will not fail or be damaged due to skewness or failure to be in place, and the difficulty of installing the moving contact in the moving contact structure of the circuit breaker is further reduced, which facilitates the maintenance, repair and adjustment of the entire structure.

[0041] As a preferred embodiment of the above, Figure 5 As shown, a contact sheet through hole 3 - 2 is provided in the middle of the contact sheet 3 , and the contact sheet through hole 3 - 2 matches with the shaft 4 , and the shaft 4 passes through the contact sheet through hole 3 - 2 in sequence and fixes the contact sheet 3 on the contact support 1 .

[0042] Specifically, a contact sheet through hole 3-2 is provided in the middle of the contact sheet 3, and the contact sheet through hole 3-2 cooperates with the shaft 4. The shaft 4 passes through the contact sheet through hole 3-2 in sequence and fixes the contact sheet 3 on the contact support 1, so as to further facilitate the assembly and disassembly of the moving contact and prevent damage to the contact support, so that the contact support can be reused to reduce costs.

[0043] As a preferred embodiment of the above, Figure 6 As shown, a circular groove 5-1 is provided inside the shell 5, and the circular groove 5-1 cooperates with the shaft 4 to limit the shaft 4; a circular hole 5-2 and a square hole 5-3 are also provided in the shell and cooperate with the first contact support protrusion 1-7 and the second contact support protrusion 1-8 to fix the shell 5, and form a snap connection with the contact support 1 to fix the shell 5 on the contact support 1.

[0044] Specifically, a circular groove 5-1 is provided inside the shell 5, and the circular groove 5-1 cooperates with the shaft 4 to limit the shaft 4; a circular hole 5-2 and a square hole 5-3 are also provided in the shell, and cooperate with the first contact support protrusion 1-7 and the second contact support protrusion 1-8 to fix the shell 5, and form a snap connection with the contact support 1, so as to fix the shell 5 on the contact support 1, so as to improve the stability of the shell 5 itself and further improve its ability to limit the shaft 4 on the contact support 1, so as to reduce the difficulty of installing the moving contact in the moving contact structure of the circuit breaker, facilitate the maintenance, repair and adjustment of the entire structure, and improve the durability of the device as a whole.

[0045] As a preferred embodiment of the above, Figure 4 As shown, a plurality of spacers 1 - 9 are arranged inside the contact support 1 for positioning the contact piece 3 and partially isolating adjacent contact pieces 3 .

[0046] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A moving contact support structure of a circuit breaker, characterized in that: It comprises a contact support (1) and a plurality of contact springs (2) and contact sheets (3); The shaft (4) passes through the contact sheet (3) and fixes the contact sheet (3) above the contact support (1); One end of the contact spring (2) is located inside the contact support (1), and the other end is in contact with the contact piece (3); the contact spring (2) and the contact support (1) form an elastic structure, and each contact piece (3) and at least two contact springs (2) are arranged correspondingly; The shell (5) is fixed on the contact support (1) to limit the position of the shaft (4).

2. The movable contact support structure of the circuit breaker according to claim 1, characterized in that: The contact support (1) is provided with two rows of positioning holes (1-1), the positioning holes (1-1) are used to place the contact springs (2), and the positioning holes (1-1) correspond to the contact springs (2) one by one and are positioned and matched.

3. The movable contact support structure of the circuit breaker according to claim 2, characterized in that: A plurality of observation holes (1-2) are respectively arranged on both sides of the contact support (1), and the observation holes (1-2) are used to observe the state of the contact spring.

4. The movable contact support structure of the circuit breaker according to claim 3, characterized in that: The front part of the contact support (1) is provided with a skylight (1-3) for observing contact pressure and overtravel, and the bottom of the middle hole of the positioning hole (1-1) is provided with a small hole (1-4) connected to the skylight (1-3).

5. The movable contact support structure of the circuit breaker according to claim 4, characterized in that: Contact support grooves (1-5) are arranged on both sides of the contact support (1), contact support through holes (1-6) are arranged inside the contact support grooves (1-5), and the contact support through holes (1-6) are used to install the shaft (4).

6. The movable contact support structure of the circuit breaker according to claim 5, characterized in that: A rod (6) is also provided, the rod (6) comprising an upper column (6-1), a lower column (6-3) and a lower boss (6-5), the upper column (6-1) and the lower column (6-3) being larger at the top and smaller at the bottom, wherein the upper end surface of the upper column (6-1) is in contact with and matched with the contact sheet (3), the lower end surface (6-2) of the upper column (6-1) is matched with the upper end surface of the contact spring (2), and the lower column (6-3) is matched with the contact support through hole (1-6). The lower boss (6-5) is provided with a lower boss through hole (6-4). The lower boss through hole (6-4) allows the lower boss (6-5) to undergo elastic deformation when passing through the small hole (1-4), so that the rod (6) and the contact support (1) are snap-fitted and the rod (6) is not easy to fall off during installation. When the contact spring (2) is compressed, the lower column (6-3) passes through the small hole (1-4), and the lower boss (6-5) expands and contracts in the skylight (1-3).

7. The movable contact support structure of the circuit breaker according to claim 1, characterized in that: Two contact sheet grooves (3-1) are arranged at the lower end of the contact sheet (3), and the contact sheet (3) corresponds to and is positioned with the contact spring (2) through the contact sheet grooves (3-1).

8. The movable contact support structure of the circuit breaker according to claim 7, characterized in that: A contact sheet through hole (3-2) is provided in the middle of the contact sheet (3), the contact sheet through hole (3-2) matches the shaft (4), and the shaft (4) passes through the contact sheet through hole (3-2) in sequence and fixes the contact sheet (3) on the contact support (1).

9. The movable contact support structure of the circuit breaker according to claim 8, characterized in that: The shell (5) is provided with a circular groove (5-1) inside, and the circular groove (5-1) cooperates with the shaft (4) to limit the shaft (4); a shell circular hole (5-2) and a shell square hole (5-3) are also provided, and cooperate with the first contact support protrusion (1-7) and the second contact support protrusion (1-8) to fix the shell (5), and form a snap connection with the contact support (1), so that the shell (5) is fixed on the contact support (1).

10. The movable contact support structure of the circuit breaker according to claim 9, characterized in that: A plurality of spacers (1-9) are arranged on the inner side of the contact support (1) for positioning the contact pieces (3) and partially isolating adjacent contact pieces (3).

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