Circuit breaker static contact assembly tool

Abstract

The utility model discloses a circuit breaker static contact assembly tool, which belongs to the field of power transmission and transformation high-voltage switch equipment and is characterized in that a fixed base and an operating rod are arranged on a bottom frame, a lead screw transmission assembly is mounted on the fixed base, and the operating rod is connected with the lead screw transmission assembly through a bevel gear assembly. A simulation moving contact used for being matched with the static contact is fixed to the lead screw transmission assembly. In the assembling process of the circuit breaker contact, the operating rod is shaken, the bevel gear assembly is driven to rotate, then the lead screw transmission assembly is driven to rotate, finally the simulation moving contact is driven to move upwards in the vertical direction, after the static main contact aligns the position, the static main contact and the contact shield are fastened through the bolt, and rapid and efficient assembling of the static contact can be achieved. By adopting the tool, matching can be performed in advance in a static contact split charging stage, so that the split charging of the static contact of the circuit breaker is completed, the reliable centering of the static contact and a moving contact of the circuit breaker is ensured, the assembling precision and the assembling efficiency of the static contact are improved, and the tool has good popularization and application values.

Description

Technical Field

[0001] The utility model belongs to the field of high-voltage switchgear for power transmission and transformation, specifically relates to the field of breaker assembly in high-voltage switchgear, and particularly relates to a static contact assembly tooling for a breaker. Background Art

[0002] A breaker is the most core component of high-voltage switchgear, and the assembly quality of the breaker is crucial for the safe operation of the power grid. During the sub-assembly process of the breaker, the centering link of the static contact assembly is particularly important. Manual assembly has low efficiency and is prone to problems of poor centering during assembly, which affects the mechanical characteristics of the breaker and the current flow of the main circuit, resulting in serious consequences. Therefore, how to accurately and efficiently complete the static contact assembly is an urgent problem to be solved.

[0003] In the existing breaker assembly process, for the centering of the contact system assembly, after the moving and static contact systems are respectively installed and then assembled onto the arc extinguishing chamber frame, a tooling is used to make the moving contact perform opening and closing movements, and the cooperation between the moving contact and the static contact is observed, and then the static contact is adjusted to ensure the centering of the moving and static contacts. The process of adjusting the centering of the moving and static contacts in the above manner takes a long time, and the states assembled by different operators are inconsistent, resulting in poor centering of the moving and static contacts, causing problems such as uneven wear between the moving and static contacts during the opening and closing process, or poor contact phenomenon, which affects the contact resistance between the moving and static contacts. Summary of the Utility Model

[0004] In order to overcome the above technical defects, the utility model provides a static contact assembly tooling for a breaker, which can solve the technical problems of low assembly accuracy and low efficiency of the static contact during the sub-assembly process of the breaker.

[0005] In order to achieve the above purpose, the utility model adopts the following technical content:

[0006] A static contact assembly tooling for a breaker includes a chassis;

[0007] A contact fixing base is arranged on the chassis, and an operating rod is inserted through the side;

[0008] A lead screw drive assembly is inserted on the fixing base, one end of the lead screw drive assembly is connected to the operating rod, and the other end is connected with a simulated moving contact;

[0009] The lead screw drive assembly is connected to the operating rod through a bevel gear assembly.

[0010] Further, the chassis includes two symmetrically arranged support plates, the support plates are provided with a top plate; the contact fixing base is installed on the top plate; the operating rod is inserted into the installation hole on the side of any one of the support plates.

[0011] Further, a first bearing is sleeved on the operating rod, and the first bearing is arranged in the mounting hole.

[0012] Further, the bevel gear assembly includes a first bevel gear and a second bevel gear that mesh with each other; the first bevel gear is connected to the operating rod; the second bevel gear is connected to the lead screw drive assembly.

[0013] Further, a spline structure is adopted for cooperation between the first bevel gear and the operating rod.

[0014] Further, the lead screw drive assembly includes a ball screw; one end of the ball screw is connected to the bevel gear assembly, and a lead screw nut is sleeved on the other end; the lead screw nut is connected to the simulated moving contact.

[0015] Further, a spline structure is adopted for cooperation between the ball screw and the bevel gear assembly.

[0016] Further, a guiding assembly is arranged on the fixed base for guiding the lead screw nut.

[0017] Further, the guiding assembly includes a positioning disk mounted on the fixed base, and guiding rods are arranged on the positioning disk; positioning holes are formed in the lead screw nut, and the positioning holes are sleeved on the guiding rods.

[0018] Further, the operating rod includes an operating shaft; one end of the operating shaft is connected to the bevel gear assembly, and an operating handle is arranged at the other end.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model provides a static contact assembly tooling for a circuit breaker. On the chassis of this tooling, a fixed base and an operating rod are arranged. A lead screw drive assembly is installed on the fixed base. The operating rod is connected to the lead screw drive assembly through a bevel gear assembly, and a simulated moving contact for cooperating with the static contact is fixed on the lead screw drive assembly; during the assembly process of the circuit breaker contact, by shaking the operating rod, the bevel gear assembly is driven to rotate, then the lead screw drive assembly is driven to rotate, and finally the simulated moving contact is driven to move upward in the vertical direction. After the static main contact is aligned, the static main contact and the contact shield are fastened through bolts, and the rapid and efficient assembly of the static contact can be realized; by adopting this tooling, pre-assembly can be carried out at the sub-assembly stage of the static contact to complete the sub-assembly of the circuit breaker static contact, ensure the reliable alignment of the circuit breaker static contact and the moving contact, improve the assembly accuracy and assembly efficiency of the static contact, and has good popularization and application value.

[0021] Preferably, in the utility model, the base frame adopts a support plate and a top plate, a mounting hole for inserting the operating rod is opened in the support plate, and a first bearing is arranged in the mounting hole and sleeved outside the operating rod, thereby ensuring the reliability of transmission.

[0022] Preferably, in the utility model, the bevel gear assembly adopts a first bevel gear and a second bevel gear; the arrangement of the first bevel gear and the second bevel gear can change the direction of the transmission force, so that the operability of the tool is stronger.

[0023] Preferably, in the utility model, the screw transmission assembly adopts a ball screw and a screw nut; the ball screw and the second bevel gear are matched in a spline manner, and the first bevel gear and the operating rod are matched in a spline manner, ensuring that the tooling has a higher connection strength and a longer fatigue life.

[0024] Preferably, in the utility model, a guide assembly is provided on the fixed base, which can guide the lead screw nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a circuit breaker static contact assembly tool provided in an embodiment of the utility model;

[0026] Figure 2 A front view of a circuit breaker static contact assembly tool provided in an embodiment of the utility model;

[0027] Figure 3 A side view of a circuit breaker static contact assembly tool provided in an embodiment of the utility model;

[0028] Figure 4 An exploded view of the structure of a circuit breaker static contact assembly tool provided in an embodiment of the utility model;

[0029] Figure 5 A schematic diagram of a circuit breaker static contact assembly tooling operation provided by an embodiment of the utility model.

[0030] Reference numerals:

[0031] Base frame-1, contact fixing base-2, guide assembly-3, screw transmission assembly-4, simulated moving contact-5, bevel gear assembly-6, operating rod-7, contact shield-8, static contact-9;

[0032] Support plate 101, top plate 102, first bearing 103, second bearing 104, positioning plate 301, guide rod 302, ball screw 401, screw nut 402, first bevel gear 601, second bevel gear 602, operating shaft 701, operating handle 702. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the following specific embodiments are used to further elaborate on the present utility model in detail. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0036] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the embodiments of the present utility model, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0038] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0039] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and defined, if the terms "set", "installed", "connected", and "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The following further describes the present utility model in detail with reference to the accompanying drawings:

[0041] Embodiment

[0042] To better understand the content of the solution of the present utility model, in this embodiment, the following explanations are made for relevant professional terms:

[0043] Circuit breaker: A mechanical switching device that can close, carry, and interrupt the current under normal circuit conditions; carry a specified overcurrent within a specified time, and can close and interrupt the current under abnormal circuit conditions (such as various short-circuit conditions).

[0044] Moving contact: The contact that moves during the operation of the circuit breaker;

[0045] Stationary contact: The contact whose position remains unchanged during the operation of the circuit breaker;

[0046] Guide rod: A part that guides the movement process of the simulated moving contact;

[0047] Lead screw nut: A nut that cooperates with the lead screw and is used to transmit motion.

[0048] Combined with what is mentioned in the background art, the existing technology mainly has the following deficiencies:

[0049] First, for the existing assembly of the stationary contact of the circuit breaker, it is through a manual method to simulate the movement of the moving contact. During the assembly process of the circuit breaker contacts, since it is by the method of manually moving the simulated contact by the operator to check its assembly and cooperation with the stationary contact, the cooperation process cannot be smoothly controlled, and it is time-consuming and laborious. Different operators have different operation skill levels, and the assembly effects are also different.

[0050] Second, the moving-side and stationary-side contacts are separately assembled and then assembled onto the arc-extinguishing chamber support frame at the same time. Since it is necessary to first use the moving contact of the circuit breaker to position and align the stationary-side contact, then disassemble the stationary contact and fasten it with the stationary contact shield, and then assemble it onto the arc-extinguishing chamber support frame, the assembly efficiency is relatively low.

[0051] To solve the above problems, this embodiment provides a static contact assembly tooling for a circuit breaker. This assembly tooling is used to simulate the actual movement characteristics of the dynamic contact of the circuit breaker, perform pre-assembly during the static contact sub-assembly stage, complete the sub-assembly of the static contact of the circuit breaker, and ensure the reliable alignment of the static contact and the dynamic contact of the circuit breaker. The utility model adopts a transmission structure with the cooperation of a nut and a lead screw, and cooperates with a guide rod and a positioning disk, which can ensure that the simulated movement process has high precision and improve the assembly efficiency. At the same time, the handle and the tooling chassis are assembled through bearings, ensuring that the transmission process is labor-saving, efficient, and the position of the simulated movement process of the main dynamic contact is easy to accurately control. Therefore, using this tooling can ensure the technical requirements for the alignment of the static and dynamic contacts of the circuit breaker, ensure that the cooperation between the static and dynamic contacts meets the technical requirements, and avoid the decrease in the main circuit current-carrying capacity caused by poor alignment of the assembled contacts of the circuit breaker and the occurrence of heating phenomenon after current-carrying.

[0052] As Figure 1 shown, this embodiment provides a static contact assembly tooling for a circuit breaker, including a chassis 1, a contact fixing base 2, a guiding component 3, a lead screw transmission component 4, a simulated dynamic contact 5, a bevel gear component 6, and an operating rod 7.

[0053] The assembly sequence from top to bottom is successively the simulated dynamic contact 5, the lead screw transmission component 4, the guiding component 3, the contact fixing base 2, the chassis 1. The operating rod 7 is assembled on the chassis 1 through a bearing, and the operating rod 7 is connected to the lead screw transmission component 4 through the bevel gear component 6. When shaking the operating handle 702 on the side of the operating rod 7 through the operating shaft 701, the rotation is transmitted to the lead screw transmission component 4 via the bevel gear component 6, and then drives the simulated dynamic contact 5 to move up and down.

[0054] Combined with Figure 3 and Figure 4 shown, in this embodiment, the chassis 1 includes a support plate 101 and a top plate 102; there is 1 mounting hole on the side of the support plate 101 for mounting the first bearing 103 of the operating rod 7, and there is 1 mounting hole and 4 threaded holes on the top plate 102 for mounting the second bearing 104 and the contact fixing base 2 respectively.

[0055] The guide rod 302 of the guiding component 3 is tightly mounted on the positioning disk 301 through tolerance fit, and the positioning disk 301 is fixed on the contact fixing base 2 by 4 groups of bolts; there is 1 through hole in the middle of the positioning disk 301 to ensure that the ball screw 401 in the lead screw transmission component 4 can pass through smoothly; the lead screw transmission component 4 is composed of the cooperation of the ball screw 401 and the lead screw nut 402.

[0056] The simulated moving contact 5 is fastened to the lead screw nut 402 by bolt connection, and its movement process is consistent with that of the lead screw nut; at the lower end of the shaft of the ball screw 401, the first bevel gear 601 of the bevel gear assembly 6 is assembled, and at one end of the operating shaft 701 in the operating rod 7, the second bevel gear 602 in the bevel gear assembly 6 is assembled. The first bevel gear 601 and the second bevel gear 602 are meshed to transmit torque; at the other end of the operating rod 7, an operating handle 702 is assembled for convenient manual operation.

[0057] As Figure 2 shown, this embodiment provides a static contact assembly tooling for a circuit breaker. The specific transmission process is as follows: Rotate the operating handle 702 to drive the operating shaft 701 to rotate. The operating shaft 701 drives the second bevel gear 602 to rotate. The second bevel gear 602 is in meshing transmission with the first bevel gear 601, driving the ball screw 401 to rotate. The ball screw 401 cooperates with the lead screw nut 402 to drive the lead screw nut 402 to move up and down. The lead screw nut 402 drives the simulated moving contact 5 to move up and down, completing the centering process of the static contact assembly of the circuit breaker.

[0058] In this embodiment, there is 1 mounting hole on the support plate 101 for mounting the first bearing 103, 1 mounting hole on the top plate 102 for the second bearing 104, and 4 threaded holes on the top plate 102 for mounting the contact fixing base 2.

[0059] In this embodiment, the contact fixing base 2 is of a disc-shaped structure, with 4 bolt holes for fixing the positioning disc 301 and another 4 bolt holes for fixing to the base 1 processed on it.

[0060] In this embodiment, the guiding assembly 3 is composed of a positioning disc 301 and a guiding rod 302. Both the positioning disc 301 and the guiding rod 302 require high-precision tolerance fits and have relatively high surface finish to ensure the precision of the guiding assembly.

[0061] The cooperation between the guiding rod 302 and the positioning disc 301 can ensure the precise movement of the simulated moving main contact; the ball screw 401 and the contact fixing base 2 are assembled through bearings. Similarly, the operating handle 702 and the chassis 1 are assembled through bearings, ensuring labor-saving and efficient transmission and easy precise control of the position of the simulated moving main contact.

[0062] In this embodiment, the lead screw transmission assembly 4 is composed of the cooperation between the ball screw 401 and the lead screw nut 402, converting the rotation of the ball screw 401 into the linear movement of the lead screw nut 402. The lead screw nut 402 is processed with bolt holes for connecting and fixing the simulated moving contact 5 for fixed connection with the simulated moving contact 5.

[0063] In this embodiment, the outer diameter of the simulated moving contact 5 is exactly the same as that of the moving contact of the circuit breaker, and the surface treatment method is the same as that of the moving contact of the circuit breaker. Threaded holes are machined for fixed connection with the lead screw nut 402. A suitable circular through hole is machined in the middle of the top surface to ensure that it does not interfere with the ball screw 401 during the up and down movement.

[0064] In this embodiment, the bevel gear assembly 6 is composed of a pair of bevel gears with exactly the same parameters. The mating positions of the second bevel gear 602 with the ball screw 401 and the first bevel gear 601 with the operating shaft 701 are internal spline structures, ensuring high connection strength and strong fatigue life. The bevel gear connection hole is an internal spline structure, and the lead screw connection shaft and the operating rod are external spline structures to ensure assembly accuracy; the assembly of the bevel gears is fixed by adjusting the shaft sleeve, brass retaining ring, and fastening nut, etc.

[0065] In this embodiment, the operating rod 7 is composed of an operating shaft 701 and an operating handle 702. The connection position of the operating shaft 701 with the second bevel gear 602 is an external spline structure, and an annular groove is machined at its end for installing a circlip to position the second bevel gear 602.

[0066] As Figure 5 shown, during the assembly of the static contact of the circuit breaker using the circuit breaker static contact assembly tooling, first pre-install the static contact 9 and the static contact shield 8 on the contact fixing base 2, shake the operating handle 702, the simulated moving contact 5 moves upward, simulating the closing action of the moving contact of the circuit breaker, realizing the simulated centering with the static contact of the circuit breaker, and then fasten the static contact 9 and the static contact shield 8 with bolts to complete the centering process during the sub-assembly of the static contact of the circuit breaker, achieving fast and efficient assembly of the static contact.

[0067] Thus, this embodiment provides a circuit breaker static contact assembly tooling. Using this tooling can ensure accurate centering during the assembly of the circuit breaker contact system, thereby ensuring the operation reliability of the circuit breaker; improving the assembly quality and efficiency of the circuit breaker contacts.

[0068] This embodiment provides a circuit breaker static contact assembly tooling, and the technical points are as follows:

[0069] First, during the assembly of the static contact, only the static main contact and the contact shield need to be pre-installed on the tooling. Operate the tooling handle, the simulated moving main contact will move upward. After the static main contact finds the correct position, fasten the static main contact and the contact shield with bolts to achieve fast and efficient assembly of the static contact.

[0070] Second, operate the handle, which is transmitted to the lead screw through the bevel gear. The lead screw nut and the simulated moving contact are an integral structure. The rotation of the lead screw drives the lead screw nut (simulated moving main contact) to move up and down to realize the assembly positioning of the static main contact; the lead screw drive ensures high assembly accuracy.

[0071] Third, the cooperation between the guide rod and the positioning disk can ensure the precise movement of the simulated moving main contact; the lead screw and the base are assembled through bearings, and the handle and the tooling chassis are assembled through bearings, ensuring labor-saving and efficient transmission process and easy precise control of the position of the simulated moving main contact.

[0072] Fourth, the guide rod and the positioning disk are processed with high-precision tolerance fit to ensure the guiding accuracy; the positioning disk is fastened to the base through bolts.

[0073] Fifth, the connection structures between the bevel gear and the lead screw connecting shaft and between the bevel gear and the operating rod are the same; the connecting hole of the bevel gear is an internal spline structure, and the lead screw connecting shaft and the operating rod are external spline structures to ensure the assembly accuracy; the assembly of the bevel gear is fixed by adjusting the shaft sleeve, brass retaining ring and fastening nut, etc.

[0074] In summary, the present utility model provides a static contact assembly tooling for a circuit breaker. Compared with the existing assembly method, it has the following advantages:

[0075] First, this tooling can simulate the movement of the moving contact and adopt a transmission scheme of nut and lead screw. The transmission from the operating rod of the tooling to the lead screw adopts a pair of bevel gears, which can ensure high transmission accuracy, ensure the smooth movement process of the simulated moving contact, be easy to control, and ensure the convenience of manual operation.

[0076] Second, adopt a guiding scheme of two high-precision guide rods cooperating with a positioning disk to ensure that the simulated moving contact will not rotate circumferentially; the outer diameter of the guide rod and the guiding hole of the positioning disk are processed with high precision to ensure that there will be no gap between the simulated moving contact and the static contact, which will affect the assembly quality.

[0077] Third, the operating rod and the chassis, and the lead screw and the chassis are assembled through bearings, which can ensure high precision, make the transmission between the handle end (power input end) and the simulated contact end (power output end) continuous, without virtual position, and have a small friction coefficient, making the assembly operation lighter.

[0078] The above embodiments are only one of the implementation manners that can realize the technical solution of the present utility model. The scope of protection required by the present utility model is not only limited by this embodiment, but also includes any changes, substitutions and other implementation manners that are easily conceivable by those skilled in the art within the technical scope disclosed by the present utility model.

Claims

1. A circuit breaker static contact assembly tool, characterized in that: comprising a base frame (1); The base frame (1) is provided with a contact fixing base (2), and an operating rod (7) is inserted through the side; A screw transmission assembly (4) is inserted on the fixed base (2), one end of the screw transmission assembly (4) is connected to the operating rod (7), and the other end is connected to a simulated moving contact (5); The screw transmission assembly (4) is connected to the operating rod (7) via a bevel gear assembly (6).

2. A circuit breaker static contact assembly tool according to claim 1, characterized in that: The base frame (1) comprises two symmetrically arranged support plates (101), the support plates (101) being mounted with a top plate (102); the contact fixing base (2) being mounted on the top plate (102); and the operating rod (7) being inserted into a mounting hole on the side of any one of the support plates (101).

3. A circuit breaker static contact assembly tool according to claim 2, characterized in that: The outer sleeve of the operating rod (7) is provided with a first bearing (103), and the first bearing (103) is arranged in the mounting hole.

4. The circuit breaker static contact assembly tool according to claim 1, characterized in that: The bevel gear assembly (6) comprises a first bevel gear (601) and a second bevel gear (602) meshing with each other; the first bevel gear (601) is connected to the operating rod (7); and the second bevel gear (602) is connected to the screw transmission assembly (4).

5. A circuit breaker static contact assembly tool according to claim 4, characterized in that: The first bevel gear (601) and the operating rod (7) are matched with each other using a spline structure.

6. The circuit breaker static contact assembly tool according to claim 1, characterized in that: The screw transmission assembly (4) comprises a ball screw (401); one end of the ball screw (401) is connected to the bevel gear assembly (6), and the other end is sleeved with a screw nut (402); the screw nut (402) is connected to the simulated moving contact (5).

7. A circuit breaker static contact assembly tool according to claim 6, characterized in that: The ball screw (401) and the bevel gear assembly (6) are matched with each other using a spline structure.

8. The circuit breaker static contact assembly tool according to claim 6, characterized in that: A guide assembly (3) is provided on the fixed base (2) for guiding the lead screw nut (402).

9. A circuit breaker static contact assembly tool according to claim 8, characterized in that: The guide assembly (3) comprises a positioning plate (301) mounted on the fixed base (2), and a guide rod (302) is arranged on the positioning plate (301); a positioning hole is opened on the lead screw nut (402), and the positioning hole is sleeved on the guide rod (302).

10. The circuit breaker static contact assembly tool according to claim 1, characterized in that: The operating rod (7) comprises an operating shaft (701); one end of the operating shaft (701) is connected to the bevel gear assembly (6), and the other end is provided with an operating handle (702).

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