Contact structure and air blast switch
By introducing elastic elements and multi-point contact design into the contact structure of the air switch, the problems of low contact reliability and high assembly difficulty of traditional contact structures are solved, achieving higher contact reliability and current carrying capacity, reducing production difficulty and losses, and improving equipment stability and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUSN RUIPU ELECTRIC
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-24
AI Technical Summary
Traditional contact structures in air switches have low contact reliability and are difficult to assemble. They are easily affected by external factors, leading to poor contact, which affects the stability and reliability of the equipment. At the same time, they require high assembly precision, which increases production difficulty and cost.
An elastic element is placed between the stationary contact and the mounting bracket. The elastic element applies an elastic force to the stationary contact to ensure stable pressure between the contacts. Multiple stationary contacts are fixed to the mounting bracket side by side, and multi-point contact is achieved in conjunction with the block-shaped moving contact, reducing the impact of assembly errors.
It improves the reliability and stability of contact, reduces production difficulty, increases current carrying capacity, meets the requirements of high current and low loss, and enhances the operational stability and production efficiency of electrical equipment.
Smart Images
Figure CN224554191U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air switch technology, and in particular to a contact structure and an air fast switch. Background Technology
[0002] As a crucial protective electrical appliance, air switches are widely used in various electrical equipment and circuits. The performance of an air switch largely depends on its core component—the contact structure.
[0003] Traditional contact structures in air circuit breaker applications present several significant problems. Common traditional contact structures use a direct-drive method to connect the moving and stationary contacts. This method lacks adaptive pressure compensation between the contacts, failing to provide stable contact pressure. This results in low contact reliability during actual use. The equipment is susceptible to external factors that can alter the contact state between the moving and stationary contacts, potentially leading to momentary disconnection or poor contact, thus affecting the normal conduction of the circuit and, in severe cases, even causing electrical faults, impacting the stability and reliability of the equipment. Furthermore, this method requires high positional accuracy of the moving and stationary contacts. During production and assembly, strict control of their relative position, angle, and spacing is necessary to ensure proper contact. However, achieving such high assembly precision is difficult in practice; even minor errors can lead to poor contact, increasing production difficulty and cost. Therefore, it is necessary to improve existing technologies to overcome their shortcomings. Utility Model Content
[0004] The problem to be solved by this utility model is to provide a contact structure and a fast air switch to overcome the shortcomings of traditional contact structures, such as low contact reliability and high assembly difficulty.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a contact structure, including: a stationary contact group and a moving contact group, wherein the stationary contact group includes at least one stationary contact, and the moving contact group includes a moving contact that is disposed opposite to the stationary contact and can be connected or disconnected from the stationary contact; the stationary contact group further includes a mounting bracket and an elastic element, one end of the stationary contact is fixedly connected to the mounting bracket, and the other end of the stationary contact is configured as a contact end that can swing along the movement direction of the moving contact; the elastic element is disposed between the stationary contact and the mounting bracket and is used to apply an elastic force to the stationary contact.
[0006] As a further improvement of this utility model, when the stationary contact and the moving contact are in a disconnected state, the stationary contact undergoes elastic deformation under the elastic force applied by the elastic element, causing the contact end to be biased toward the moving contact.
[0007] As a further improvement of this utility model, the mounting bracket is provided with a limiting stop, and when the stationary contact and the moving contact are in a disconnected state, the contact end is stopped on the limiting stop.
[0008] As a further improvement of this utility model, multiple stationary contacts are provided, and the multiple stationary contacts are fixed side by side to the mounting bracket, and the elastic element is provided between each stationary contact and the mounting bracket.
[0009] As a further improvement of this utility model, one moving contact is provided, and it is block-shaped. The moving contact is simultaneously arranged opposite to the contact ends of multiple stationary contacts.
[0010] As a further improvement of this utility model, the moving contact group also includes a limiting pin, and the moving contact has a waist-shaped hole in the middle, and the limiting pin is inserted into the waist-shaped hole.
[0011] As a further improvement of this utility model, the elastic element is a spring, and the stationary contact and the mounting bracket are provided with spring positioning grooves on their respective sides facing each other, with the two ends of the elastic element respectively positioned in the two spring positioning grooves.
[0012] As a further improvement of this utility model, one side of the contact end is provided with an outwardly protruding contact portion, which is disposed opposite to the moving contact.
[0013] As a further improvement of this utility model, the stationary contact and the mounting bracket are fixedly connected by bolts and nuts.
[0014] This utility model also provides an air quick switch, including the contact structure as described above.
[0015] The beneficial effects of this utility model are:
[0016] 1. This utility model provides a contact structure and an air quick switch. By setting an elastic element between the mounting bracket and the stationary contact, the elastic force applied by the elastic element to the stationary contact can effectively ensure the pressure between the contacts, ensuring that the moving contact and the stationary contact always maintain a good contact state, which greatly improves the reliability of the contact. At the same time, since the elastic element can compensate for the contact position deviation caused by assembly error to a certain extent, the stationary contact and the moving contact do not need to be adjusted after being fixed in place during the production and assembly process, thereby reducing the production difficulty and improving the production efficiency.
[0017] 2. This utility model adopts multiple stationary contacts fixed side by side on the mounting bracket, and each stationary contact is provided with an elastic element between the stationary contact and the mounting bracket. At the same time, the block-shaped moving contact is arranged opposite to the contact ends of the multiple stationary contacts to achieve multi-point contact. This design greatly increases the current carrying capacity, reduces the contact resistance, and meets the needs of modern electrical equipment for high current, low loss and fast air switching. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a front view of the contact structure of this utility model in a broken state;
[0020] Figure 2 This is a perspective view of the stationary contact assembly of the contact structure of this utility model;
[0021] Figure 3 This is a cross-sectional view of the stationary contact assembly of the contact structure of this utility model;
[0022] Figure 4 This is another perspective view of the stationary contact assembly of the contact structure of this utility model;
[0023] Figure 5 This is a perspective view of the moving contact assembly of the contact structure of this utility model;
[0024] Figure 6 This is a front view of the contact structure of this utility model in the on state.
[0025] Referring to the accompanying drawings, the following explanations are provided:
[0026] 1. Stationary contact; 101. Contact end; 1011. Contact part; 2. Moving contact; 201. Waist-shaped hole; 3. Mounting bracket; 301. Limiting stop; 4. Elastic element; 5. Limiting pin; 6. Bolt; 7. Nut; 8. Stationary end conductor busbar; 9. Moving end conductor busbar; 10. Insulator transmission assembly. Detailed Implementation
[0027] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0028] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0029] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.
[0030] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0031] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.
[0032] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.
[0033] Example 1
[0034] See Figures 1 to 6This utility model provides a contact structure, including a stationary contact group and a moving contact group. The stationary contact group includes at least one stationary contact 1, and the moving contact group includes a moving contact 2 disposed opposite to the stationary contact 1. The moving contact 2 can move towards the stationary contact 1 during a closing operation to connect with the stationary contact 1; and during an opening operation, the moving contact 2 can move away from the stationary contact 1 to disconnect from the stationary contact 1.
[0035] As a key improvement of this invention, the stationary contact assembly further includes a mounting bracket 3 and an elastic element 4. The stationary contact 1 in this invention is a sheet with a certain thickness. One end of the stationary contact 1 is fixedly connected to the mounting bracket 3, and the other end of the stationary contact 1 is configured as a contact end 101 that can swing along the movement direction of the moving contact 2. The contact end 101 is used to connect or disconnect with the moving contact 2. The elastic element 4 is disposed between the stationary contact 1 and the mounting bracket 3, and the elastic element 4 is used to apply an elastic force to the stationary contact 1.
[0036] The contact structure of this utility model, by setting a mounting bracket 3 and placing an elastic element 4 between the mounting bracket 3 and the stationary contact 1, effectively ensures the pressure between the contacts by utilizing the elastic force applied by the elastic element 4 to the stationary contact 1. Even when affected by external factors such as vibration during equipment operation, the elastic element 4 can adaptively adjust the contact pressure to ensure that the moving contact 2 and the stationary contact 1 always maintain a good contact state, greatly improving the reliability of the contact, reducing the risk of electrical faults caused by poor contact, and enhancing the stability of electrical equipment operation. At the same time, since the elastic element 4 can compensate for contact position deviations caused by assembly errors to a certain extent, during the production and assembly process, it is not necessary to strictly control the relative position, angle, and spacing parameters of the moving contact 2 and the stationary contact 1 as in traditional structures. Once the stationary contact 1 and the moving contact 2 are fixed in place, no position adjustment is required, thereby reducing production difficulty and improving production efficiency.
[0037] It is worth mentioning that the mounting bracket 3 is provided with a limiting stop 301. When the stationary contact 1 and the moving contact 2 are in the disconnected state, the stationary contact 1 undergoes elastic deformation under the elastic force applied by the elastic element 4, causing the contact end 101 to be biased towards the moving contact 2 and stopped on the limiting stop 301 (e.g., Figure 1(As shown). In this invention, the stationary contact 1 undergoes elastic deformation under the elastic force applied by the elastic element 4, resulting in a bias that creates a certain elastic pressure when the moving contact 2 and the stationary contact 1 first come into contact. This additional initial contact pressure helps overcome potential adverse factors such as oxide films and foreign matter on the contact surface, further ensuring good electrical contact and improving the reliability and stability of the contact connection. Furthermore, after the moving contact 2 separates from the stationary contact 1, the stationary contact 1 can quickly return to its initial bias state under the elastic action of the elastic element 4, preparing for the next switching operation and improving the response speed and operational efficiency of the contact structure. Simultaneously, this bias state also helps maintain the positional stability of the stationary contact 1 after separation, preventing it from swaying arbitrarily due to external vibrations, ensuring the consistency and accuracy of each switching and connecting action, and guaranteeing the stability and reliability of the entire contact structure.
[0038] Furthermore, traditional single-contact structures often perform poorly in terms of current carrying capacity, failing to meet the requirements of electrical equipment with high current carrying capacity, and also exhibiting relatively high contact resistance. For example... Figure 2 and Figure 5 As shown, in order to solve this technical problem, this utility model adopts a method of providing multiple stationary contacts 1, which are fixed side by side to the mounting bracket 3, and an elastic element 4 is provided between each stationary contact 1 and the mounting bracket 3. A single moving contact 2 is provided, which is block-shaped and is simultaneously positioned opposite to the contact ends 101 of the multiple stationary contacts 1.
[0039] This utility model employs multiple stationary contacts 1 fixed side-by-side on a mounting bracket 3, with an elastic element 4 provided between each stationary contact 1 and the mounting bracket 3. Simultaneously, a block-shaped moving contact 2 is positioned opposite to the contact ends 101 of the multiple stationary contacts 1, achieving multi-point contact. This design significantly increases current carrying capacity. Compared to traditional single-point contact, it can more effectively disperse current, reduce contact resistance, thereby reducing losses and contact temperature, preventing adhesion, and meeting the demands of modern electrical equipment for high current and low losses.
[0040] Specifically, in this embodiment, four stationary contacts 1 are provided.
[0041] See Figure 3 In this embodiment, the elastic element 4 is a spring. The stationary contact 1 and the mounting bracket 3 are provided with spring positioning grooves on their respective sides facing each other. The two ends of the elastic element 4 are respectively positioned in the two spring positioning grooves so as to always apply an elastic force to the stationary contact 1 in the direction of the moving contact 2.
[0042] In this invention, the moving contact assembly also includes a limiting pin 5. A waist-shaped hole 201 is provided in the middle of the moving contact 2, and the limiting pin 5 is inserted into the waist-shaped hole 201. The limiting pin 5 remains fixed and serves to guide and limit the movement of the moving contact 2. On the one hand, it ensures that the moving contact 2 maintains a stable trajectory during the connection or disconnection with the stationary contact 1, preventing wobbling or deviation. On the other hand, it limits the travel distance of the moving contact 2, ensuring the accuracy of its position during opening and closing operations, thereby further improving the reliability and stability of the contact structure.
[0043] See Figure 2 Each of the four contact ends 101 has an outwardly protruding contact portion 1011 on one side facing the moving contact 2, and the contact portion 1011 is arranged opposite to the moving contact 2. During the closing operation, the moving contact 2 moves toward the stationary contact 1 and simultaneously abuts against the four contact portions 1011, thereby achieving connection with the four stationary contacts 1 (e.g., Figure 6 (As shown). This utility model improves the reliability and stability of the contact between the stationary contact 1 and the moving contact 2 by providing a contact part 1011 on the stationary contact 1 and using the contact part 1011 to contact the moving contact 2.
[0044] See Figure 2 and Figure 4 The four stationary contacts 1 are fixedly connected to the mounting bracket 3 using bolts 6 and nuts 7. Specifically, each of the four stationary contacts 1 has a through hole at its upper end, and the mounting bracket 3 has mounting holes that correspond one-to-one with the four through holes. The bolts 6 pass through the through holes on the stationary contacts 1 and the mounting holes on the mounting bracket 3 and are threaded into the nuts 7 to lock and fix the stationary contacts 1 onto the mounting bracket 3. This connection method is stable and reliable, ensuring the stability of the stationary contacts 1 during use.
[0045] In this utility model, the mounting bracket 3 is made of insulating plastic material and is molded. The stationary contacts 1 are all embedded in the mounting bracket 3. This fixing structure is relatively firm and has high reliability.
[0046] Example 2
[0047] This utility model also provides an air quick switch, including the contact structure as described in Embodiment 1.
[0048] Furthermore, this utility model's air quick switch also includes a housing, an operating mechanism (all based on existing conventional technology), and an insulator transmission assembly 10 that drives the operating mechanism and the moving contact 2. The operating mechanism, mounting bracket 3, and limit pin 5 are all fixed within the air quick switch's housing. The operating mechanism drives the moving contact 2 via the insulator transmission assembly 10 to switch the air quick switch's open / closed state.
[0049] See Figures 1 to 6 The stationary contact group is also provided with a stationary conductive busbar 8, which is welded to the upper end of the four stationary contacts 1; the moving contact group is also provided with a moving conductive busbar 9, which is fixedly connected to the moving contact 2 through the insulator transmission assembly 10. Both the stationary conductive busbar 8 and the moving conductive busbar 9 extend outward through the housing of the air fast switch for easy connection to the circuit.
[0050] The air quick switch provided by this utility model innovatively adopts the contact structure described in Embodiment 1 based on existing technology. This contact structure, through the cooperation of components such as the stationary contact 1, moving contact 2, mounting bracket 3, and elastic element 4, effectively solves the problems of low contact reliability and high assembly precision requirements of traditional contact structures, significantly improving the electrical and mechanical performance of the contact structure. The air quick switch constructed based on this, except for the aforementioned innovative contact structure, uses existing conventional technologies for all other structures. These conventional structures have been widely used and verified in the field of air quick switches, exhibiting mature and reliable characteristics. They work in conjunction with the innovative contact structure of this utility model to jointly constitute a high-performance air quick switch. Therefore, the other structures of the air quick switch will not be described in detail here.
[0051] This air quick switch, with its novel contact structure design, overcomes the shortcomings of traditional products in practical applications, providing a more efficient, stable, and reliable circuit protection solution for related electrical equipment. It has extremely high practical value and market promotion potential.
[0052] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.
[0053] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A contact structure, comprising: A stationary contact group, wherein the stationary contact group includes at least one stationary contact (1). and a moving contact group, wherein the moving contact group includes a moving contact (2) disposed opposite to the stationary contact (1) and capable of being connected or disconnected from the stationary contact (1). The feature is that the stationary contact group further includes a mounting bracket (3) and an elastic element (4). One end of the stationary contact (1) is fixedly connected to the mounting bracket (3), and the other end of the stationary contact (1) is configured as a contact end (101) that can swing along the movement direction of the moving contact (2). The elastic element (4) is disposed between the stationary contact (1) and the mounting bracket (3) and is used to apply an elastic force to the stationary contact (1).
2. The contact structure according to claim 1, characterized in that: When the stationary contact (1) and the moving contact (2) are in a disconnected state, the stationary contact (1) undergoes elastic deformation under the elastic force applied by the elastic element (4), causing the contact end (101) to be biased toward the moving contact (2).
3. The contact structure according to claim 2, characterized in that: The mounting bracket (3) is provided with a limiting stop (301). When the stationary contact (1) and the moving contact (2) are in a disconnected state, the contact end (101) is stopped on the limiting stop (301).
4. The contact structure according to claim 1, characterized in that: The stationary contact (1) is provided in multiple ways, and the multiple stationary contacts (1) are fixed side by side to the mounting bracket (3), and the elastic element (4) is provided between each stationary contact (1) and the mounting bracket (3).
5. The contact structure according to claim 4, characterized in that: The moving contact (2) is provided in one block shape, and the moving contact (2) is simultaneously arranged opposite to the contact ends (101) of the multiple stationary contacts (1).
6. The contact structure according to claim 5, characterized in that: The moving contact group also includes a limiting pin (5), and the moving contact (2) has a waist-shaped hole (201) in the middle, and the limiting pin (5) is inserted into the waist-shaped hole (201).
7. The contact structure according to claim 1, characterized in that: The elastic element (4) is a spring. The stationary contact (1) and the mounting bracket (3) are provided with spring positioning grooves on their respective sides facing each other. The two ends of the elastic element (4) are respectively positioned in the two spring positioning grooves.
8. The contact structure according to claim 1, characterized in that: One side of the contact end (101) is provided with an outwardly protruding contact portion (1011), which is disposed opposite to the moving contact (2).
9. The contact structure according to claim 1, characterized in that: The stationary contact (1) and the mounting bracket (3) are fixedly connected by bolts (6) and nuts (7).
10. A quick-connect air switch, characterized in that: Includes the contact structure described in any one of claims 1 to 9.