A closing holding device

Abstract

This utility model provides a closing and holding device, relating to the field of electrical equipment. It includes a contact body mounted on a closing and holding assembly. The contact body contains a stationary conductive rod and a moving conductive rod. A second contact is connected to the top of the moving conductive rod, and a rotatable ball is mounted on the second contact. A first contact is located on the side of the stationary conductive rod that contacts the ball. By providing a rotatable ball on the second contact of the moving conductive rod, when it contacts the first contact of the stationary conductive rod, the ball can adaptively adjust the contact angle, resulting in a more uniform current distribution on the contact surface. This avoids excessive local current density and significantly reduces contact resistance. The ball achieves rolling contact during closing and opening, greatly reducing mechanical wear compared to the sliding contact of traditional planar contacts. This helps extend the service life of the contacts and reduce equipment failures and maintenance costs caused by contact wear.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment, and in particular to a closing holding device. Background Technology

[0002] In today's power systems and electrical equipment, closing and holding devices play a crucial role. These devices typically consist of a robust housing and sophisticated internal components. Their design aims to ensure that the circuit remains stably closed when the circuit is closed, providing a reliable guarantee for the continuous transmission of power.

[0003] The working principle of a closing holding device typically involves the coordinated action of mechanical locking and electrical control. After the closing operation is completed, the device uses a specific mechanical structure to firmly lock the closed position, preventing opening due to external vibration, interference, or other unexpected factors. In practical applications, this type of closing holding device is widely used in various parts of the power system, such as substations, distribution rooms, and industrial production lines. Traditional closing holding devices usually employ a planar contact design, where the moving and stationary conductive rods contact and separate through the planar contact during closing and opening operations. However, this traditional design has some significant shortcomings.

[0004] Traditional planar contacts, due to their sliding contact, experience significant mechanical wear under frequent closing and opening operations. Over time, wear and scratches easily appear on the contact surface, affecting contact performance, increasing contact resistance, and potentially causing overheating, arcing, and other adverse phenomena, thus reducing the reliability and service life of the device. Therefore, a closing holding device is proposed. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a closing and holding device. By incorporating a rotatable ball bearing on the second contact of the moving conductive rod, the ball bearing adaptively adjusts its contact angle when in contact with the first contact of the stationary conductive rod. This results in a more uniform current distribution across the contact surface, preventing excessively high local current density and significantly reducing contact resistance. The ball bearing achieves rolling contact during closing and opening, greatly reducing mechanical wear compared to the sliding contact of traditional planar contacts. This helps extend the service life of the contacts and reduces equipment failures and maintenance costs caused by contact wear.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution to the problem of the closing and holding device through the following technical solution.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A closing holding device includes a contact body disposed on a closing holding assembly. The contact body has a stationary conductive rod and a moving conductive rod disposed inside. A second contact is connected to the top of the moving conductive rod, and a rotatable ball is mounted on the second contact. A first contact is disposed on the side of the stationary conductive rod that contacts the ball.

[0009] Preferably, a gap is reserved between the static conductive rod and the first contact, and a retractable compression spring is provided in the gap.

[0010] Preferably, the bottom of the static conductive rod is provided with a stabilizing groove, the top of the first contact is connected to a stabilizing shaft, and the stabilizing shaft extends into the stabilizing groove for movement.

[0011] Preferably, one end of the compression spring is welded to the stabilizing shaft, and the other end is welded to the top of the inner wall of the stabilizing groove.

[0012] Preferably, the stabilizing groove is provided with limiting grooves on all four sides, and the stabilizing shaft is connected to sliders on all four sides, with the sliders slidably connected to the matching limiting grooves.

[0013] Preferably, a protective raised pad is glued to the end of the first contact facing the stationary conductive rod.

[0014] Preferably, the protective convex pad is made of rubber.

[0015] Preferably, the side of the first contact that contacts the ball is configured as a smooth plane to reduce friction and wear.

[0016] Preferably, the second contact has a movable cavity, and one end of the ball is rotatably connected therein.

[0017] Preferably, a limiting structure is provided on the outer periphery of the opening of the active cavity to limit the rotation range of the ball.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The closing and holding device provided in this application features a rotatable ball bearing on the second contact of the moving conductive rod. When the ball bearing contacts the first contact of the stationary conductive rod, it adaptively adjusts the contact angle, resulting in a more uniform current distribution on the contact surface. This avoids excessive local current density and significantly reduces contact resistance. The ball bearing achieves rolling contact during closing and opening, greatly reducing mechanical wear compared to the sliding contact of traditional planar contacts. This helps extend the service life of the contacts and reduce equipment failures and maintenance costs caused by contact wear.

[0020] This application utilizes a compression spring on the contact plane of the stationary conductive rod to provide crucial buffering during closing. When the ball bearings on the moving conductive rod press against the first contact, the first contact compresses the spring via the stabilizing shaft. The elastic deformation of the compression spring effectively absorbs the impact force during closing, preventing excessive impact force from damaging the contact and other internal components.

[0021] This application utilizes a sliding block around the stabilizing shaft to engage with a limiting groove around the stabilizing groove at the bottom of the stationary conductive rod, providing precise guidance for the moving conductive rod during closing and opening. This prevents the moving conductive rod from shifting or swaying due to uneven force, ensuring that the moving conductive rod can accurately contact or separate from the stationary conductive rod and its first contact, thus improving the accuracy and stability of the entire closing and holding device operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of a partially disassembled structure of the present invention;

[0025] Figure 3 This is a partial structural diagram showing the disassembled contact body, static conductive rod, and moving conductive rod of this utility model;

[0026] Figure 4 This is a partial structural diagram of the static conductive rod of this utility model, viewed from below.

[0027] Figure 5 This is a partial structural diagram of the moving conductive rod and the ball bearing of this utility model;

[0028] Figure 6 This is a partial structural schematic diagram of the front cross-section of the moving conductive rod and the second contact of this utility model;

[0029] Figure 7 This is a partial structural diagram showing the disassembled static conductive rod and the first contact of this utility model;

[0030] Figure 8 This utility model Figure 4 A schematic diagram of the frontal cross-sectional structure.

[0031] Drawing number explanation: 1. Closing holding assembly; 2. Contact body; 3. Stationary conductive rod; 301. First contact; 302. Protective convex pad; 4. Moving conductive rod; 401. Second contact; 4011. Movable cavity; 4012. Limiting structure; 402. Ball bearing; 5. Stabilizing shaft; 501. Stabilizing groove; 502. Compression spring; 503. Slider; 504. Limiting groove. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings.

[0033] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0034] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0035] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0036] Please see Figure 1 - Figure 8 A closing holding device includes a contact body 2 disposed on a closing holding assembly 1. The contact body 2 is provided with a stationary conductive rod 3 and a movable conductive rod 4 inside. A second contact 401 is connected to the top of the movable conductive rod 4, and a rotatable ball 402 is installed on the second contact 401. A first contact 301 is disposed on the side of the stationary conductive rod 3 that contacts the ball 402.

[0037] The closing holding device of this application is mainly composed of closing holding assembly 1, contact body 2, stationary conductive rod 3, first contact 301, moving conductive rod 4, second contact 401 and ball bearing 402, etc. The following is a detailed description of its structure and working principle.

[0038] Contact Body 2 Design

[0039] Moving conductive rod 4 and second contact 401: A second contact 401 is connected to the top of the moving conductive rod 4. A movable cavity 4011 is formed inside the second contact 401, into which one end of a ball bearing 402 is rotatably connected. A limit structure 4012 is provided on the outer periphery of the opening of the movable cavity 4011 to limit the rotation range of the ball bearing 402. The ball bearing 402 can be made of stainless steel, which has good conductivity and hardness, enabling rolling contact during closing and opening processes.

[0040] The stationary conductive rod 3 and the first contact 301: A gap is reserved between the stationary conductive rod 3 and the first contact 301. A protective protruding pad 302 is glued to the end of the first contact 301 facing the stationary conductive rod 3. The protective protruding pad 302 is made of rubber and can fill the tiny gap when the first contact 301 moves close to and contacts the stationary conductive rod 3, ensuring stable contact. The side of the first contact 301 that contacts the ball 402 is constructed as a smooth plane, such as using copper, to reduce friction and wear and improve conductivity.

[0041] Elastic buffer structure: A set of small compression springs 502, in a cylindrical helical configuration, are installed on the contact surface of the stationary conductive rod 3. One end of the spring is fixed to the stationary conductive rod 3, and the other end is connected to a first contact 301, which is a metal plate. The compression springs 502 are made of high-strength stainless steel to ensure that they are not prone to rusting or deformation during long-term use. Their stiffness is designed according to the operating force of the closing holding device and the required buffering effect.

[0042] Stability design

[0043] Stabilizing shaft 5 and slider 503: The stabilizing shaft 5 is mounted on top of the first contact 301, and the slider 503 is connected around the stabilizing shaft 5. One end of the compression spring 502 is welded to the stabilizing shaft 5, and the other end is welded to the top of the inner wall of the stabilizing groove 501. This ensures that the stabilizing shaft 5 can move within the stabilizing groove 501. The slider 503 can be made of wear-resistant plastic and is slidably connected inside the matching limiting groove 504, providing precise guidance for the moving conductive rod 4 and preventing it from shifting or swaying due to uneven force during closing and opening.

[0044] Overall structural assembly

[0045] The contact body 2 is installed on the closing holding assembly 1, ensuring that all components are securely connected and accurately positioned. Simultaneously, the entire device undergoes rigorous quality testing and debugging to ensure stable and reliable performance.

[0046] II. Working Principle

[0047] (I) Closing process

[0048] When the closing operation begins, the external operating mechanism drives the moving conductive rod 4 to move towards the stationary conductive rod 3.

[0049] The ball 402 on the second contact 401 at the top of the moving conductive rod 4 gradually approaches the first contact 301 on the stationary conductive rod 3. Due to the rolling characteristics of the ball 402, it can adaptively adjust the contact angle during the contact process to ensure a good electrical connection with the first contact 301. After the ball 402 contacts the first contact 301, it drives the conductive rod 4 to continue moving. At this time, the first contact 301 is subjected to the squeezing force of the ball 402. Under the squeezing force, the first contact 301 compresses the compression spring 502 located in the gap between the stationary conductive rod 3 and the first contact 301 through the stabilizing shaft 5. The compression spring 502 undergoes elastic deformation, absorbing the impact force during closing and preventing excessive impact force from damaging the contacts and other components during the closing process. During the closing process, the sliders 503 around the stabilizing shaft 5 slide within the limiting grooves 504 around the stabilizing groove 501 at the bottom of the stationary conductive rod 3, providing precise guidance for the moving conductive rod 4 and ensuring that the moving conductive rod 4 accurately contacts the first contact 301 and the stationary conductive rod 3, preventing deviation or swaying due to uneven force.

[0050] (II) Circuit Breaking Process

[0051] When the circuit breaker is opened, the external operating mechanism drives the movable conductive rod 4 to move away from the stationary conductive rod 3. As the movable conductive rod 4 moves, the ball bearing 402 gradually separates from the first contact 301. At this time, the compressed spring 502 returns to its original state, pushing the first contact 301 back to its initial position. During the opening process, the movable conductive rod 4 also slides within the limiting groove 504 via the slider 503, ensuring the accuracy and stability of the opening operation.

[0052] Through the above design, the closing holding device utilizes the rolling contact of the ball 402, the buffering effect of the compression spring 502, and the guiding effect of the slider 503 and the limit groove 504 to effectively reduce mechanical wear, improve the reliability and service life of the device, and ensure the stability and reliability of closing operation in the power system.

[0053] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A closing holding device, characterized in that: The device includes a contact body (2) provided on the closing holding assembly (1). The contact body (2) is provided with a stationary conductive rod (3) and a moving conductive rod (4) inside. The top of the moving conductive rod (4) is connected to a second contact (401), and a rotatable ball (402) is installed on the second contact (401). The side of the stationary conductive rod (3) that contacts the ball (402) is provided with a first contact (301).

2. The closing and holding device according to claim 1, characterized in that A gap is reserved between the static conductive rod (3) and the first contact (301), and a retractable compression spring (502) is provided in the gap.

3. The closing and holding device according to claim 1, characterized in that The bottom of the static conductive rod (3) is provided with a stabilizing groove (501), and the top of the first contact (301) is connected to a stabilizing shaft (5), which extends into the stabilizing groove (501) for movement.

4. The closing and holding device according to claim 2, characterized in that One end of the compression spring (502) is welded to the stabilizing shaft (5), and the other end is welded to the top of the inner wall of the stabilizing groove (501).

5. The closing and holding device according to claim 3, characterized in that The stabilizing groove (501) has a limiting groove (504) around its perimeter, and the stabilizing shaft (5) is connected to a slider (503) around its perimeter, with the slider (503) slidably connected to the matching limiting groove (504) inside.

6. The closing and holding device according to claim 1, characterized in that The end of the first contact (301) facing the stationary conductive rod (3) is glued with a protective protruding pad (302).

7. A closing holding device according to claim 6, characterized in that: The protective convex pad (302) is made of rubber.

8. The closing and holding device according to claim 1, characterized in that The side of the first contact (301) that contacts the ball (402) is configured as a smooth plane to reduce friction and wear.

9. The closing and holding device according to claim 1, characterized in that: The second contact (401) has a movable cavity (4011) and one end of the ball (402) is rotatably connected therein.

10. The closing and holding device according to claim 9, characterized in that A limiting structure (4012) is provided on the outer periphery of the opening of the active cavity (4011) to limit the rotation range of the ball (402).

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