Double-chuck moving contact knife structure of high-voltage load switch
By designing a double-clamp moving contact blade structure for the high-voltage load switch and utilizing the design of the bent portion and inclined surface, the problem of poor neutrality after assembly is solved, close contact between the moving contact and the static contact is achieved, contact resistance is reduced, and heat accumulation is avoided.
Patent Information
- Application Number
- CN202423037597.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-10
AI Technical Summary
The double-clamp contacts of the high-voltage load switch have poor neutrality after assembly, resulting in one side tightly abutting the static contact while the other side cannot make close contact, increasing the contact resistance value and potentially causing heat accumulation and burning.
A double-clamp moving contact blade structure is designed, including a first bending part and a second bending part, so that the second straight plate shrinks toward the middle direction of the moving contact. Combined with the inclined surface design, it ensures that the moving contact and the static contact are in close contact, and the assembly tolerance is compensated by the bending part to achieve close contact.
The improved double-chuck moving contact blade structure reduces the contact resistance value, ensures close contact between the moving contact and the static contact, avoids heat accumulation, and improves the structural simplicity and contact tightness of the product.
Smart Images
Figure CN223486933U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit breaker technology, and in particular to a double-clamp moving contact structure for a high-voltage load switch. Background Technology
[0002] A high-voltage load switch is an electrical device that falls between a high-voltage circuit breaker and a high-voltage disconnector. It is often used in series with a high-voltage fuse and is primarily used to control power transformers. It has a simple arc-extinguishing device and can make, carry, and break current under normal conditions, and even operate normally under specified overload conditions. However, a high-voltage load switch cannot interrupt short-circuit currents, so it is usually used in conjunction with a high-voltage fuse to provide short-circuit protection.
[0003] The double-clamp moving contact of the high-voltage load switch is fixedly mounted on the main shaft of the load switch. As the main shaft rotates, it works in conjunction with the stationary contact on the load switch to open and close the switch.
[0004] Due to the manufacturing tolerances of each component, the alignment between the double-clamped contact and the stationary contact is poor after assembly. This results in one side of the double-clamped contact tightly abutting one side of the stationary contact, while the other side cannot tightly abut against the stationary contact, increasing the contact resistance. This causes a large amount of heat to be generated when current passes through, and in severe cases, it can burn out. Therefore, the applicant has made a useful design and found a way to solve the above problems. The technical solution to be introduced below was developed in this context. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of traditional high-voltage load switch designs and provide a product with a simple structure and tight contact.
[0006] To solve the above problems, the present invention adopts the following technical solution.
[0007] A double-clamp moving contact structure for a high-voltage load switch includes a body, the body having a rotatable double-clamp moving contact, the body having a stationary contact that cooperates with the double-clamp moving contact, the double-clamp moving contact including a first straight plate, the first straight plate extending to have a first bent portion, the first bent portion extending to have a second bent portion, the second bent portion extending to have a second straight plate, the second straight plate contracting towards the center of the double-clamp moving contact.
[0008] Preferably, the second straight plate is provided with a moving contact, the moving contact having a first inclined surface facing the stationary contact.
[0009] Preferably, the inlet of the stationary contact is provided with a second inclined surface on both sides.
[0010] Preferably, the bending direction of the first bending portion and the second bending portion is towards the center of the double-clamp moving contact blade.
[0011] Preferably, the main body is provided with a main shaft, the main shaft is provided with a linkage plate, and the linkage plate is hinged to the first straight plate.
[0012] Beneficial effects:
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] This invention uses a first bend and a second bend to cause the second straight plate to contract toward the center of the double-clamped moving contact, thereby ensuring that the moving contact tightly abuts against the stationary contact. Furthermore, the first bend and the second bend also compensate for the tolerance values generated after the assembly of various components. Through the above design, the moving contact and the stationary contact are ensured to abut against each other tightly, reducing the contact resistance value, thereby overcoming the problems raised in the prior art and giving the product the advantages of simple structure and tight contact. Attached Figure Description
[0015] Figure 1 This is a front view of a double-clamp moving contact structure of a high-voltage load switch according to this utility model;
[0016] Figure 2 For this utility model Figure 1 A partially enlarged view A of a double-clamp moving contact structure of a high-voltage load switch;
[0017] Figure 3 This is a schematic diagram of the structure of a double-clamp moving contact knife structure of a high-voltage load switch according to the present invention;
[0018] Figure 4 For this utility model Figure 3 A partially enlarged view (B) of a double-clamp moving contact structure for a high-voltage load switch;
[0019] The correspondence between the labels and component names in the attached figures is as follows:
[0020] Reference numerals in the attached drawings: 1. Body; 2. Double-headed moving contact knife; 3. Stationary contact; 4. Moving contact; 5. Main shaft; 6. Linkage plate; 21. First straight plate; 22. First bending section; 23. Second bending section; 24. Second straight plate; 31. Second inclined surface; 41. First inclined surface. Detailed Implementation
[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0023] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0024] Reference example Figures 1 to 4 A double-clamp moving contact structure for a high-voltage load switch includes a body 1, a rotatable double-clamp moving contact 2, and a stationary contact 3 that cooperates with the double-clamp moving contact 2. The double-clamp moving contact 2 includes a first straight plate 21, a first bent portion 22 extending from the first straight plate 21, a second bent portion 23 extending from the first bent portion 22, and a second straight plate 24 extending from the second bent portion 23. The second straight plate 24 contracts toward the center of the double-clamp moving contact 2. The first bent portion 22 and the second bent portion 23 cause the second straight plate 24 to contract toward the center of the double-clamp moving contact 4, thereby making the moving contact 4 tightly abut against the stationary contact 3. Furthermore, the first bent portion 22 and the second bent portion 23 also compensate for the tolerance values generated after the assembly of various components. The above design ensures that the moving contact 4 and the stationary contact 3 are tightly abutted against each other, reducing the contact resistance value.
[0025] It is worth mentioning that the second straight plate 24 is provided with a moving contact 4, which is provided with a first inclined surface 41 and faces the stationary contact 3. The first inclined surface is used in conjunction with the second inclined surface to facilitate the moving contact of the double clamp to enter both sides of the stationary contact 3.
[0026] It is worth mentioning that the inlet of the stationary contact 3 is provided with second inclined surfaces 31 on both sides. When the first inclined surface 41 touches the second inclined surface 31, as the moving contact 4 gradually moves towards the stationary contact 3, the second inclined surface will push the second straight plate 24 to both sides, thereby allowing the first bending part 22 and the second bending part 23 to store energy and release elastic force to the second straight plate 24, so that the moving contact 4 and the stationary contact 3 fit tightly together.
[0027] It is worth mentioning that the bending direction of the first bending part 22 and the second bending part 23 is in the middle direction of the double-clamp moving contact knife 2, and the bending direction causes the second straight plate 24 to retract in the middle direction of the double-clamp moving contact knife 2.
[0028] It is worth mentioning that the main body 1 is provided with a main shaft 5, the main shaft 5 is provided with a linkage plate 6, the linkage plate 6 is hinged to the first straight plate 21, and the linkage plate 6 drives the double-clamp moving contact knife 2 to rotate.
[0029] The above design scheme enables the product to achieve the advantages of simple structure and close contact.
[0030] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.
Claims
1. A double-clamp moving contact structure for a high-voltage load switch, comprising a body (1), wherein the body (1) is provided with a rotatable double-clamp moving contact (2), and the body (1) is provided with a stationary contact (3) that cooperates with the double-clamp moving contact (2), characterized in that: The dual-clamp moving contact knife (2) includes a first straight plate (21), the first straight plate (21) extends to provide a first bent portion (22), the first bent portion (22) extends to provide a second bent portion (23), the second bent portion (23) extends to provide a second straight plate (24), and the second straight plate (24) retracts towards the middle of the dual-clamp moving contact knife (2).
2. The double-clamp moving contact structure of the high-voltage load switch according to claim 1, characterized in that: The second straight plate (24) is provided with a moving contact (4), the moving contact (4) is provided with a first inclined surface (41) and faces the stationary contact (3).
3. The double-clamp moving contact structure of the high-voltage load switch according to claim 2, characterized in that: The stationary contact (3) has a second inclined surface (31) on both sides of the entrance.
4. The double-clamp moving contact structure of the high-voltage load switch according to claim 3, characterized in that: The first bending portion (22) and the second bending portion (23) are bent in the direction of the middle of the double-clamp moving contact knife (2).
5. The double-clamp moving contact structure of the high-voltage load switch according to claim 4, characterized in that: The main body (1) is provided with a main shaft (5), the main shaft (5) is provided with a linkage plate (6), and the linkage plate (6) is hinged to the first straight plate (21).