A self-closing isolating switch

Abstract

The application relates to the field of disconnectors, in particular to a self-tightening disconnector which comprises a base; at least two insulating supports are arranged on the base; a conductive support is arranged on each insulating support, and the conductive supports are electrically connected and disconnected through breakable conductive blades; the conductive blades comprise two interval-distributed contact plate connecting plates which are connected through a linkage structure 7; the linkage structure 7 comprises a linkage mechanism which is penetrated in the conductive blades, and linkage bolts in the linkage mechanism are penetrated in the two contact plate connecting plates in the conductive blades at the same time; through the linkage structure 7, the connection and assembly between the two contact plate connecting plates are facilitated; meanwhile, through the arrangement of a fastening sleeve, the shortest distance interval between the two contact plate connecting plates can be controlled; and the two contact plate connecting plates can be connected through the linkage bolts.

Description

Technical Field

[0001] This invention relates to the field of disconnect switches, and more specifically to a self-tightening disconnect switch. Background Technology

[0002] Disconnecting switches are indispensable key equipment in high-voltage power transmission and distribution systems. Their main function is to isolate and connect circuits under no-load or low-load current conditions, providing a clear electrical disconnect point for inspection and maintenance.

[0003] As power systems develop towards higher voltage and larger capacity, higher requirements are placed on the reliability, current carrying capacity, and service life of disconnecting switches.

[0004] Traditional disconnector switch structures have the following shortcomings:

[0005] Unstable contact pressure. In traditional rigid bolt crimped structures, the contact pressure between the conductive switch and the conductive support is entirely determined by the initial preload of the bolt. During long-term operation, affected by factors such as electrodynamics, thermal cycling, and creep of metal materials, the bolt preload gradually decreases, leading to a drop in contact pressure and an increase in contact resistance. This can cause localized overheating, and in severe cases, even contact burnout or switch failure.

[0006] In traditional structures, the contact plate and conductive support are in rigid contact during the closing process. If there is a slight deviation in the closing position, a hard collision can easily occur, causing the contacts to bounce or mechanically jam, affecting the smoothness of closing.

[0007] Meanwhile, when a short-circuit current passes through, a huge electrodynamic repulsion force is generated between the contacts. The rigid connection structure cannot effectively resist this repulsion force, and there is a risk that the contacts will detach instantly.

[0008] The existing patent CN118629803 A - an outdoor high-voltage disconnector switch moving and stationary contacts and device does not clearly disclose the technical content that solves the above-mentioned technical problems.

[0009] Therefore, in order to improve or solve at least one of the above-mentioned technical problems, it is necessary to optimize the design of existing disconnect switches. Summary of the Invention

[0010] The purpose of this invention is to provide a self-tightening disconnecting switch with a floating closing capability for the conductive knife switch.

[0011] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0012] A self-tightening disconnector includes a base; the base is provided with at least two insulating supports.

[0013] Each insulating support is equipped with a conductive support, and the conductive supports are electrically connected and disconnected through a disengageable conductive switch.

[0014] One end of the conductive switch is rotatably connected to a conductive support on one side, and the other end can be connected to a conductive support on the other side.

[0015] The conductive switch includes two spaced-apart contact plates connected together by a linkage structure.

[0016] The linkage structure includes a linkage mechanism that passes through the conductive switch, and the linkage mechanism includes a linkage bolt; the linkage bolt passes through two contact plates in the conductive switch.

[0017] The linkage structure further includes a limiting mechanism; the limiting mechanism includes a fastening sleeve and / or a support spring disposed on the linkage bolt;

[0018] The fastening sleeve is arranged in the area between the two contact plates;

[0019] The support spring is arranged in the area between the nut or bolt and the adjacent conductive switch in the linkage bolt.

[0020] The limiting mechanism also includes an isolation bushing; the isolation bushing is sleeved on the linkage bolt, the isolation bushing includes a bushing body, and the bushing body is provided with an assembly groove; one end of the support spring is arranged in the assembly groove in the isolation bushing; the other end presses against the conductive switch.

[0021] The linkage structure also includes a rotating unit disposed on the conductive switch;

[0022] The rotating unit includes a rotating mechanism and an auxiliary mechanism; the rotating mechanism includes a rotating component; the conductive switch is rotatably connected to a conductive support via the rotating component.

[0023] The auxiliary mechanism includes an auxiliary pin that can rotate around a rotating component following the conductive switch; the rotating component is connected to a conductive support; the outer side of the auxiliary pin is in contact with the conductive support; and the conductive support is provided with a swing positioning arc surface.

[0024] The conductive support includes a support base plate, which includes a transverse support plate and a longitudinal support plate; the conductive support is connected to the insulating support column through the transverse support plate, and the conductive support is inserted into the conductive switch through the longitudinal support plate.

[0025] The outer side of the longitudinal support plate is arc-shaped; the end of the longitudinal support plate in the conductive support is provided with an avoidance notch.

[0026] The support base plate is connected to the insulating support column via a fastening unit; the fastening unit includes multiple fastening mechanisms, each of which includes a fastening bolt; the fastening bolt passes through the support base plate and is connected to the insulating support column.

[0027] The fastening mechanism also includes an adjusting nut and / or adjusting shim fitted onto the fastening bolt.

[0028] The contact plate includes a plate base, and the plate base has a flange on at least one side; the flange and the plate base are arranged to intersect; the connection between the plate base and the flange is made of an arc-shaped surface transition.

[0029] The advantages of this invention are:

[0030] The present invention facilitates the connection and assembly between two contact plate connecting plates through the setting of the linkage structure.

[0031] Meanwhile, the invention can control the shortest distance between the two contact plates by setting the fastening sleeve; it facilitates the subsequent insertion of the longitudinal support plate into the gap between the two contact plates; it can also work with the fastening bolt to limit the closed position of the conductive switch; in addition, the outer side of the fastening sleeve can make contact with the corresponding conductive support, increasing the contact area between the conductive switch and the conductive support.

[0032] The support spring facilitates the compression and fixation of the two contact plate connecting plates by the linkage bolt, ensuring the stability of the contact plate connecting plate's inner side contact with the longitudinal support plate in the conductive support.

[0033] Meanwhile, the support spring can continuously provide external compressive force to the conductive switch, ensuring the stability of the connection between the conductive switch and the conductive support.

[0034] Meanwhile, the supporting spring of this invention also plays a good role in buffering and avoiding obstacles. In subsequent use, it can help to open the two contact plate connecting plates, so that the conductive switch can be sleeved on the outside of the longitudinal support plate in the conductive support.

[0035] The isolation bushing plays a good role in restraining and limiting, which facilitates the arrangement of the support spring on the linkage bolt, and also plays a good guiding role. In addition, by controlling the depth of the assembly groove in the isolation bushing, the initial support force of the support spring can be adjusted.

[0036] The spacer function of the fastening sleeve: The fastening sleeve is not just a simple spacer; it actually transforms the "flexible connection" between the two contact plates into a "rigid spacer." This solves the problem of inconsistent spacing between the two connecting plates due to uneven bolt tightening torque during assembly of traditional disconnect switches, ensuring that the longitudinal support plate can be smoothly inserted into the predetermined gap.

[0037] Preload adjustment of the assembly countersunker: The depth control of the assembly countersunker on the isolation bushing (selected according to different specifications) allows the initial compression of the support spring to be precisely set. This means that the most suitable contact pressure can be preset according to material properties and usage environment during the assembly stage, realizing the upgrade from "experience-based assembly" to "parametric assembly".

[0038] The invention combines surface and line contact: the outer side of the fastening sleeve and the conductive support form an auxiliary contact surface. In conventional designs, current is mainly conducted through the inner side of the contact plate and the longitudinal support plate. However, this invention adds an extra conductive path and mechanical support through the sleeve, which reduces the risk of overheating from a single contact surface while diverting large currents.

[0039] The "live connection" characteristic of the support spring: At the moment of closing, if there is a slight deviation in position, the elasticity of the support spring allows the two contact plates to "adaptively open" slightly when they are fitted into the longitudinal support plate, and then lock in place using the elastic restoring force after closing. This "yield-restoration" mechanism effectively avoids contact bounce or mechanical jamming caused by hard collisions.

[0040] Continuous pressure compensation: First, creep compensation. Long-term electrodynamic and thermal cycling can cause microscopic creep in metal materials, and the spring can continuously compensate for the resulting pressure attenuation. Second, vibration anti-loosening. Under the huge electrodynamic repulsive force generated when short-circuit current passes through, the preload of the supporting spring can effectively resist the repulsive force and prevent the contacts from disengaging instantly.

[0041] Integration of guidance and restraint: The isolation bushing not only restrains and supports the spring but also acts as a guide. This prevents the spring from radially bending or "jamming" during frequent opening and closing, ensuring that the direction of the spring force is always perpendicular to the contact plate, so that the clamping force is entirely converted into effective contact force, rather than harmful lateral torque.

[0042] In this invention, the linkage bolt provides axial locking force; the fastening sleeve determines the minimum rigidity spacing to prevent over-tightening; the support spring provides continuous elastic compensation; and the isolation bushing constrains the spring's extension and contraction path. This combination upgrades the originally single-function bolt connection into a composite linkage system with four functions: "distance setting, pre-tightening, buffering, and guiding." The fastening sleeve solves the problem of "accurate installation," the support spring solves the problems of "tightening" and "long service life," and the isolation bushing solves the problem of "stable operation." This design transforms the connection between the conductive switch and the conductive support from the traditional "rigid bolt crimping" to "elastic adaptive snap-fit," ensuring both ease of installation and reliability during operation. It is a typical innovative solution that improves electrical connection quality through a sophisticated mechanical structure. Attached Figure Description

[0043] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0044] Figure 1 This is a schematic diagram of the structure of the present invention.

[0045] Figure 2 This is a schematic diagram of the structure of the rotating unit and the conductive support when the conductive switch is closed, from a first-view perspective.

[0046] Figure 2 This is a schematic diagram from a first-view perspective of the structure of the rotating unit and the conductive support when the conductive switch is opened in this invention.

[0047] Figure 3 This is a first-view structural schematic diagram of the linkage mechanism of the present invention when connected to the conductive switch.

[0048] Figure 4 This is a schematic diagram of the linkage mechanism of the present invention when connected to the conductive switch. It is a second-view structural diagram.

[0049] Figure 5 This is a schematic diagram of the structure of the conductive support connected to the insulating support via a fastening mechanism in this invention.

[0050] Figure 6 This is a schematic diagram of the structure of the conductive support connected to the insulating support via a fastening mechanism in this invention.

[0051] The markings in the above figures are all:

[0052] 1. Conductive support, 2. Conductive switch, 3. Insulating support, 4. Auxiliary mechanism, 5. Rotating mechanism, 6. Base, 7. Linkage mechanism, 8. Fastening bolt, 9. Fastening sleeve. Detailed Implementation

[0053] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0054] A self-tightening disconnect switch includes a base 6; at least two insulating supports 3 are provided on the base 6; each insulating support 3 is respectively installed with a conductive support 1, and the conductive supports 1 are electrically connected and disconnected through a disengageable conductive switch 2; one end of the conductive switch 2 is rotatably connected to one side of the conductive support 1, and the other end can be connected to the other side of the conductive support 1; the base 6 is the mounting base of the self-tightening disconnect switch; and the insulating supports 3 are vertically installed on the base 6; generally, two insulating supports 3 are provided, and the two insulating supports 3 are distributed in parallel at intervals.

[0055] The base 6 provides a stable mechanical platform, ensuring the overall stability of the disconnecting switch during opening and closing operations, as well as when subjected to wind pressure and electrodynamic forces.

[0056] Electrical isolation: The insulating support 3 electrically isolates the upper conductive parts (conductive support 1, conductive switch 2) from the lower base 6 and mounting point (usually grounded). Since the disconnect switch itself does not have arc-extinguishing capability, the insulating support 3 must ensure that flashover or breakdown does not occur when subjected to the highest system voltage and various overvoltages, thereby ensuring the safety of operators and equipment.

[0057] Conductive support 1: fixedly installed on the top of each insulating support 3; disconnectable conductive switch 2: serves as a movable bridging component connecting two conductive supports 1.

[0058] The conductive switch 2 and the conductive support 1 can establish an electrical path: when the conductive switch 2 is closed (i.e., one end is connected to the movable side conductive support 1 and the other end is connected to the fixed side conductive support 1), the current flows from the conductive support 1 on one insulating pillar 3 through the conductive switch 2 to the conductive support 1 on another insulating pillar 3, thus realizing the conduction of the circuit.

[0059] In this invention, the conductive switch 2 includes two spaced-apart contact plates 21 connected together by a linkage structure. The two spaced-apart contact plates 21 constitute the main body of the conductive switch 2, forming a "clamp-like" structure; the linkage structure passes between the two contact plates 21, combining them into a whole.

[0060] The linkage structure of this invention facilitates the connection between the contact plate connecting plates 21, and also enables a self-tightening function during subsequent use.

[0061] By designing the conductive switch 2 as two spaced-apart contact plates 21, and coordinating them with a linkage structure, a flexible clamping space is formed. When the switch is closed, the longitudinal support plate 12 (or the stationary contact portion) of the conductive support 1 on the other side is inserted into the gap between the two contact plates 21. Compared to a single-pole switch, the double-contact plate 21 structure provides double-sided contact surfaces, increases the conductive cross-sectional area, and helps reduce contact resistance.

[0062] The linkage structure plays a crucial integrated role: the rigid components in the linkage structure (such as the fastening sleeve 9) control the minimum distance between the two contact plate connecting plates 21. This distance is slightly less than or equal to the length of the longitudinal support plate 12 of the conductive support 1, ensuring that an interference fit preload is generated when the circuit is closed, while preventing the contact plate connecting plates 21 from deforming or jamming due to overtightening of the bolts.

[0063] The elastic component (support spring 103) in the linkage structure provides a continuous axial preload. During equipment operation, even if the contact plate 21 is worn or creeped due to thermal expansion or long-term operation, the spring can automatically compensate and maintain a tight fit between the inner surface of the contact plate 21 and the conductive support 1.

[0064] The two contact plates 21 are connected by a linkage bolt 102 and other structures, ensuring that they maintain a fixed relative position and move synchronously during opening and closing. This prevents the two contact plates 21 from being misaligned when inserted into the conductive support 1. This synchronicity ensures that the conductive switch 2 can smoothly slide into the correct position of the conductive support 1 when closing, avoiding mechanical jamming or poor contact on one side due to uneven force.

[0065] In summary, the base 6 and the insulating support 3 provide rigid support, ensuring the ground insulation and alignment accuracy of the conductive circuit. The conductive switch 2 (double contact plate 21) provides the accommodating space and conductive cross-section. The linkage structure acts as an adjustment hub; it uses a rigid component (fastening sleeve 9) to ensure the geometric accuracy of the insertion gap, and an elastic component (support spring 103) to provide dynamic self-adaptation capability for the contact pressure.

[0066] In this invention, the linkage structure 7 includes a linkage mechanism 1-1 that passes through the conductive switch 2. The linkage mechanism 1-1 includes a linkage bolt 102. The linkage bolt 102 passes through two contact plates 21 in the conductive switch 2. The linkage mechanism 1-1 is designed to connect the two contact plates 21. When the conductive switch 2 and the conductive support 1 are connected through the linkage mechanism 1-1, the linkage bolt 102 in the linkage mechanism 1-1 can act as a rotating component 51. Based on the above, it can be understood that the linkage mechanism 1-1 disclosed in this invention can be used as a rotating mechanism 5 in subsequent use.

[0067] In this invention, the linkage bolt 102 is a long screw (usually used with a nut) that passes through both contact plate connecting plates 21 simultaneously. The linkage bolt 102 passes vertically through the two spaced-apart contact plate connecting plates 21, combining the two originally independent conductive plates into a rigid conductive switch 2 assembly.

[0068] If the two contact plates 21 are not secured, they are prone to misalignment, wobbling, or uneven force during opening and closing operations. The linkage bolt 102 connects the two contact plates 21 into a stable whole by applying axial locking force. When driving the conductive switch 2 to rotate, the linkage bolt 102 ensures that the two contact plates 21 move with exactly the same angular velocity and trajectory, avoiding "jamming or scraping" caused by unilateral lag.

[0069] The linkage bolt 102 provides the mounting base for the fastening sleeve 9. The fastening sleeve 9 is fitted onto the linkage bolt 102 and located between the two contact plates 21. The axial locking force of the linkage bolt 102 determines the tightness of the fastening sleeve 9.

[0070] The opening gap in the middle of the conductive switch 2 is precisely controlled by the cooperation of the linkage bolt 102 and the fastening sleeve 9. This gap determines the tightness of the insertion of the conductive support 1 (longitudinal support plate 12) when the switch is closed, and is the key to achieving self-tightening rather than self-locking.

[0071] The shank of the linkage bolt 102 provides an installation and guide position for the support spring 103. The spring is sleeved on the bolt, with one end abutting against the nut or bolt and the other end abutting against the contact plate 21. The linkage bolt 102 here is not only a locking element, but also a transmission shaft for elastic force. It bears the reaction force generated by the compression of the support spring 103 and converts this force into a continuous compressive force on the contact plate 21, ensuring that the contact plate 21 and the conductive support 1 always maintain a tight fit.

[0072] In conventional designs, current is primarily conducted through the inner surface of the contact plate 21 and the longitudinal support plate 12 of the conductive support 1. However, in this invention, the linkage bolt 102 (and the fastening sleeve 9 fitted onto it) are both made of conductive metal; at the moment of closing or when subjected to short-circuit electric repulsion, the two contact plates 21 tend to be "spread out" or "flattened". The linkage bolt 102, through its tensile strength, limits the excessive elastic deformation of the contact plate 21.

[0073] This invention upgrades the linkage bolt 102 from a simple fastener into a multifunctional structural component: axially, it provides locking force through its threads, compressing the support spring 103 to achieve self-tightening; radially, it precisely controls the spacing between the connecting plates by fitting a fastening sleeve 9; kinematically, it acts as a connector, ensuring the synchronicity of the movement of the double-contact connecting plates 21. The linkage bolt 102 itself is rigid, ensuring that the basic geometric dimensions between the two contact connecting plates 21 remain unchanged (in conjunction with the fastening sleeve 9). However, it also allows the support spring 103 fitted on it to flexibly expand and contract, giving the conductive switch 2 an "adaptive" yielding capability when inserted into the conductive support 1, and providing a "self-tightening" clamping force after the switch is closed.

[0074] The linkage bolt 102 of this invention is the core mechanical hub that enables the "self-tightening" function of this invention. It not only physically connects the two contact plates 21 together, but more importantly, through its coordinated action with the fastening sleeve 9 and the support spring 103, it transforms simple "bolt tightening" into a composite connection mode of "rigid distance + flexible tightening." This design ensures the precise guidance and synchronous movement required by the conductive switch 2 during opening and closing, and provides continuous elastic compensation for maintaining contact pressure during long-term operation, thus effectively solving the problem of poor contact caused by thermal expansion and contraction or mechanical wear in traditional disconnect switches.

[0075] Furthermore, the linkage structure 7 in this invention also includes a limiting mechanism; the limiting mechanism includes a fastening sleeve 9 and / or a support spring 103 disposed on the linkage bolt 102; the fastening sleeve 9 is arranged in the area between the two contact plate connecting plates 21; the support spring 103 is arranged in the area between the nut or bolt and the adjacent conductive switch 2 in the linkage bolt 102. The fastening sleeve 9 is arranged in the area between the two contact plate connecting plates 21; it is usually a rigid metal tubular part with a certain wall thickness, sleeved on the linkage bolt 102.

[0076] The support spring 103 is arranged between the nut (or bolt) of the linkage bolt 102 and the outer side of the adjacent conductive switch 2 (contact plate 21). It is usually a compression spring, which is also sleeved on the thread of the linkage bolt 102.

[0077] In this invention, the fastening sleeve 9 is located between the two contact plates 21, providing rigid support. The axial length of the fastening sleeve 9 determines the shortest distance between the two contact plates 21 in the locked state. This function is crucial—it prevents the contact plates 21 from bending inward or becoming jammed due to over-tightening of the linkage bolt 102 during assembly, ensuring a precise and stable gap between the two contact plates 21 at all times. This precisely controlled gap is designed to accommodate the longitudinal support plate 12 (stationary contact) on the conductive support 1. The presence of the fastening sleeve 9 ensures that the longitudinal support plate 12 can be smoothly inserted between the two contact plates 21 regardless of how tightly the linkage bolt 102 is tightened, avoiding "inaccessible" due to over-tight assembly or "poor contact" due to over-loose assembly. As mentioned earlier, the outer surface of the fastening sleeve 9 can contact the conductive support 1 under certain conditions, increasing the conductive cross-sectional area and playing a role in assisting current diversion.

[0078] The support spring 103 is mainly used for elastic preload and dynamic compensation. Located between the outer side of the contact plate 21 and the fastener (nut / screw), the support spring 103 provides elastic force: providing axial preload: after compression, its restoring force is transmitted to the linkage bolt 102 through the nut / screw, and then acts on the two contact plates 21. This force is converted into continuous pressure on the inner surface of the contact plate 21, keeping the contact plate 21 and the longitudinal support plate 12 in close contact. Dynamic gap compensation: during equipment operation, metal thermal expansion due to current heating or dimensional changes due to long-term mechanical wear can cause fluctuations in contact pressure. The elastic characteristics of the support spring 103 allow it to adaptively expand and contract—slightly compressing during thermal expansion to maintain constant pressure, and automatically elongating to fill gaps after wear, thus maintaining long-term stability of contact pressure. Buffering and yielding: At the moment of closing, when the longitudinal support plate 12 is inserted between the two contact plate connecting plates 21, the support spring 103 allows the contact plate connecting plates 21 to open slightly elastically, achieving "flexible insertion"; after closing, the spring force presses the contact plate connecting plates 21 tightly onto the longitudinal support plate 12. This "yielding first, then pressing" mechanism effectively avoids contact bounce caused by hard collision.

[0079] The fastening sleeve 9 and the support spring 103 work synergistically; although they are in different positions, they complement each other perfectly in function. The fastening sleeve 9 sets a "lower limit" to ensure that the two contact plates 21 will not be completely closed due to external pressure, always leaving insertion space for the conductive support 1. The support spring 103 provides "upper limit" compensation, ensuring that the contact plates 21 always maintain sufficient clamping force on the conductive support 1 regardless of changes in external conditions. The combined effect of the two makes the conductive switch 2 form a "fixed-distance clamping with elastic margin" when closing, ensuring both smooth insertion and reliable contact.

[0080] The fastening sleeve 9 and / or support spring 103 of this invention can be used alone or separately. Using both simultaneously is the optimal implementation, combining the advantages of rigid distance control and elastic compensation.

[0081] Only the fastening sleeve 9 is configured: In specific application scenarios, the basic spacing is guaranteed by the rigid sleeve alone, which is suitable for working conditions where the requirements for elastic compensation are not high.

[0082] Only the support spring 103 is configured: In some designs, the spring provides the preload, while the spacing control is indirectly achieved by the tightening torque of the linkage bolt 102.

[0083] The limiting mechanism in this invention achieves rigid spacing by arranging the fastening sleeve 9 between the contact plate connecting plates 21, and achieves elastic pre-tensioning by arranging the support spring 103 between the outer side of the contact plate connecting plates 21 and the fasteners. This constructs a complete mechanical control system that coordinates internal and external forces and complements rigidity and flexibility. It ensures smooth closing (no jamming) while guaranteeing reliable contact during long-term operation (no loosening). The fastening sleeve 9 provides precise geometric constraints, and the support spring 103 provides continuous mechanical compensation. The combination of these two elements enables the connection between the conductive switch 2 and the conductive support 1 to achieve precise static assembly and stable dynamic operation.

[0084] Furthermore, the limiting mechanism in this invention also includes an isolation bushing 101; the isolation bushing 101 is sleeved on the linkage bolt 102, and the isolation bushing 101 includes a bushing body with an assembly groove; one end of the support spring 103 is arranged in the assembly groove in the isolation bushing 101; the other end presses against the conductive switch 2. The tubular part sleeved on the linkage bolt 102 has an inner diameter not less than the outer diameter of the linkage bolt 102, ensuring that the bushing can be freely inserted. The assembly groove is provided in an annular groove or stepped hole at one end of the bushing body to accommodate the end of the support spring 103. The isolation bushing 101 is sleeved on the linkage bolt 102 and located between the support spring 103 and the linkage bolt 102. One end of the support spring 103 is embedded in the assembly groove of the isolation bushing 101, and the other end presses against the outer surface of the conductive switch 2 (contact plate 21).

[0085] The isolation bushing 101 radially limits the end of the support spring 103 through the assembly countersunk groove:

[0086] To prevent spring misalignment: Without the isolation bushing 101, the support spring 103 is prone to radial bending, twisting, or "snaking" during compression and extension, causing the spring force direction to deviate from the axis and generating harmful lateral torque. The mounting groove firmly "binds" the spring end in the predetermined position, ensuring that the spring compression direction is always parallel to the axis of the linkage bolt 102.

[0087] Ensuring the directionality of the force: This binding effect allows the elastic force generated by the support spring 103 to act precisely on the contact plate 21 along the axial direction, avoiding uneven force distribution or unilateral wear on the contact plate 21 caused by spring deflection.

[0088] The isolation bushing 101 acts as a guide element between the linkage bolt 102 and the support spring 103.

[0089] The support spring 103 is sleeved on the outer wall of the isolation bushing 101 (or the bushing is partially inserted into the inner diameter of the spring). The isolation bushing 101 provides a smooth guide path for the extension and retraction of the spring. This design effectively avoids direct contact and friction between the spring and the threads of the linkage bolt 102, preventing the threads from being scratched by the spring end or from being contaminated by metal debris generated by friction on the contact surface.

[0090] The depth of the mounting groove is a designable and controllable dimensional parameter. This feature enables the isolation bushing 101 to adjust the initial support force of the support spring 103. The relationship between groove depth and preload: The depth of the mounting groove determines the initial compression of the support spring 103 when it is installed. The deeper the groove, the smaller the initial compression of the spring and the lower the initial support force; the shallower the groove, the greater the initial compression of the spring and the higher the initial support force.

[0091] By selecting isolation bushings 101 with different groove depths (or by precisely controlling the groove dimensions through machining), the preload can be precisely adjusted without changing the parameters of the spring itself. This allows the contact pressure between the conductive switch 2 and the conductive support 1 to be optimized according to actual working conditions.

[0092] In mass production, there are manufacturing tolerances for the thickness of the contact plate 21 and the installation position of the linkage bolt 102. The groove depth of the isolation bushing 101 can be used as a compensation method to absorb the accumulated tolerances and ensure that the contact pressure of each product is within the design range.

[0093] The isolation bushing 101 separates the spring from the thread of the linkage bolt 102, avoiding repeated friction between the spring and the thread edge during the extension and contraction process, thus extending the fatigue life of the spring.

[0094] The addition of the isolation bushing 101 makes the limiting mechanism a more complete "three-element" system: the fastening sleeve 9 sets the lower geometric limit (minimum spacing); the support spring 103 provides the upper mechanical limit (continuous clamping force); and the isolation bushing 101 ensures the precise transmission of force (guidance, positioning, and adjustability). The three work together to enable the conductive switch 2 to achieve a comprehensive effect of "precise insertion, smooth guidance, continuous clamping, and stable reliability" when closing.

[0095] The isolation bushing 101 performs four functions simultaneously: positioning, guiding, adjusting, and isolating. It integrates functions that would otherwise require multiple parts into one, simplifying the assembly process.

[0096] By controlling the depth of the assembly groove, the preload of the support spring 103 is changed from "qualitative" to "quantitative", which enables the design and adjustment of the contact pressure and improves the product's process adaptability and performance consistency.

[0097] The isolation bushing 101 effectively prevents direct contact between the spring and the bolt thread, avoids wear on the spring end and scratches on the thread, and extends the service life of key components.

[0098] Furthermore, in this invention, the inner diameter of the isolation bushing 101 and the fastening sleeve 9 is not less than the outer diameter of the linkage screw; this arrangement facilitates the assembly of the isolation bushing 101 and the fastening sleeve 9 on the linkage screw.

[0099] In this invention, the fastening sleeve 9 is relatively large, giving it a certain degree of oscillation capability. This reduces the interference between the fastening sleeve 9 and the adjacent conductive support 1 when the conductive switch 2 is closed. Additionally, the large size of the fastening sleeve 9 necessitates a fastening mechanism at its lower end after the conductive switch 2 is closed. The nuts of the fastening bolts 8 in the fastening mechanism can lift the fastening sleeve 9, and with the limiting action of the linkage bolts 102, the side of the fastening sleeve 9 can be made to fit against the side of the conductive support 1, which to some extent increases the contact area between the conductive switch 2 and the conductive support 1.

[0100] Furthermore, the linkage structure 7 in this invention also includes a rotating unit disposed on the conductive switch 2; the rotating unit includes a rotating mechanism 5 and an auxiliary mechanism 4; the rotating mechanism 5 includes a rotating component 51; the conductive switch 2 is rotatably connected to a conductive support via the rotating component 51; the auxiliary mechanism 4 includes an auxiliary pin 41, which can rotate around the rotating component 51 following the conductive switch 2; the rotating component 51 passes through the conductive support 1; the outer surface of the auxiliary pin 41 is in contact with the conductive support 1; the conductive support 1 is provided with a swing positioning arc surface 142; the rotating unit of this invention adopts a dual support and guiding design combining the rotating mechanism 5 and the auxiliary mechanism 4, which significantly improves the stability and alignment accuracy of the conductive switch 2 movement.

[0101] The rotating mechanism 5 mainly includes a rotating component 51. The rotating component 51 can be of various types, such as a shaft, pin, or hinge shaft, or it can be a bolt structure, similar to the linkage bolt 102 disclosed in this invention. The rotating component 51 is connected to the conductive support 1, serving as the main rotation center of the conductive switch 2. The conductive switch 2 is rotatably connected to one side of the conductive support 1 through this rotating component 51.

[0102] The auxiliary mechanism 4 mainly includes an auxiliary pin 41: the auxiliary pin 41 is set on the conductive switch 2 (usually near the rotating part 51) and can swing around the rotating part 51 together with the conductive switch 2.

[0103] The swing positioning arc surface 142 is set on the conductive support 1 and fits against the outer side of the auxiliary pin 41.

[0104] Rotating component 51 defines the axis of rotation and bears the main load and rotational constraint of the conductive switch 2. Auxiliary pin 41 serves as an auxiliary support point, and its outer surface always remains in contact with the swing positioning arc surface 142 on the conductive support 1, sliding along the arc surface during the swing of the conductive switch 2.

[0105] Rotating mechanism 5: Determines the rotation center and the supporting body; provides a precise axis of rotation: The rotating component 51 serves as the main shaft of the conductive switch 2, ensuring that the conductive switch 2 always rotates around a fixed axis during the opening and closing process. This is the basis for ensuring that the other end of the conductive switch 2 can be accurately aligned with the conductive support 1 (stationary contact) on the other side.

[0106] The rotating component 51 bears the weight of the conductive switch 2, the operating force, and the impact load during the opening and closing process, providing reliable mechanical support for the entire movable part.

[0107] The auxiliary mechanism 4 provides motion guidance and swing trajectory constraint; the cooperation between the auxiliary pin 41 and the swing positioning arc surface 142 constitutes a motion guiding pair.

[0108] Constraining the swing trajectory: The auxiliary pin 41 is attached to the swing positioning arc surface 142 of the conductive support 1. When the conductive switch 2 rotates around the rotating member 51, the auxiliary pin 41 slides along the arc surface. The geometry of the arc surface (such as a circular arc surface) determines the movement path of the auxiliary pin 41, thereby constraining the swing trajectory of the conductive switch 2 from the second point.

[0109] Eliminating rotational backlash: With only one rotating component 51, radial wobble may occur in the conductive switch 2 due to machining tolerances and wear. The fit between the auxiliary pin 41 and the arc surface effectively eliminates this backlash, making the movement of the conductive switch 2 more certain and stable, and avoiding contact misalignment caused by wobble.

[0110] Dual support: enhancing system stiffness and stability;

[0111] Two-point positioning principle: The rotating component 51 and the auxiliary pin 41 form two support points distributed along the length direction on the conductive switch 2. According to mechanical principles, two points determine a motion trajectory. This design makes the conductive switch 2 over-constrained during the swing process (under reasonable design, just-constrained), which significantly improves the rigidity of the motion system.

[0112] Resistance to lateral forces: During the opening and closing process, the operating mechanism may apply lateral forces. The double support structure effectively resists these lateral forces, preventing the conductive switch 2 from twisting or swaying.

[0113] 4. Special functions of the oscillating positioning arc surface 142

[0114] The swing positioning arc surface 142 on the conductive support 1 is not a simple circular arc surface; its design incorporates multiple considerations:

[0115] Integrated guidance and limiting: The arc surface not only guides the movement of the auxiliary pin 41, but also limits the swing angle of the conductive switch 2 at the extreme positions (opening position, closing position) through the end point of the arc surface or a specific curvature change.

[0116] In this invention, the rotating mechanism 5 provides a reference axis to ensure that the conductive switch 2 can rotate around a fixed center; the auxiliary mechanism 4 provides trajectory constraints to ensure that the conductive switch 2 does not wobble during rotation; the two work together to ensure that the conductive switch 2 maintains a fixed posture throughout the entire opening and closing stroke, ensuring that the other end can be accurately and smoothly inserted into the conductive support 1 on the other side, avoiding jamming or poor contact caused by movement deviation.

[0117] The present invention adopts a dual constraint scheme of "main rotating component 51 + auxiliary guide component", which improves the motion determinism of the conductive switch 2 from "single point positioning" to "dual point guidance", significantly improving the motion accuracy.

[0118] The swing positioning arc surface 142 and the auxiliary pin 41 form a pair of low pairs (surface contact), which have the advantages of high load-bearing capacity, uniform wear and long service life compared with point contact or line contact.

[0119] Rotating component 51 focuses on bearing loads and providing a rotation axis, while auxiliary mechanism 4 focuses on guiding and eliminating backlash. This functional separation allows each component to be optimized for its core task, improving the overall system reliability.

[0120] The rotating unit in this invention determines the rotation center and the supporting body through the rotating mechanism 5, and provides motion guidance and trajectory constraints through the auxiliary mechanism 4 (auxiliary pin 41 and swing positioning arc surface 142), thus constructing a swing system with main and auxiliary coordination and dual support.

[0121] Furthermore, in this invention, the conductive support 1 includes a support base plate, which includes a transverse support plate 11 and a longitudinal support plate 12. The conductive support 1 is connected to the insulating support column 3 via the transverse support plate 11, and the conductive support 1 is inserted into the conductive switch 2 via the longitudinal support plate 12. The conductive support 1 is mainly composed of a support base plate, which includes two functionally defined parts: the transverse support plate 11 and the longitudinal support plate 12. The transverse support plate 11 is located at the bottom of the support base plate and extends horizontally or approximately horizontally. It is connected to the top of the insulating support column 3 by fasteners.

[0122] The longitudinal support plate 12 is located on the side of the support base plate and extends vertically or nearly vertically, forming an intersecting (usually L-shaped) structure with the transverse support plate 11. As a stationary contact part, it is inserted into the gap between the two contact plates 21 of the conductive switch 2.

[0123] The transverse support plate 11 and the longitudinal support plate 12 together form an L-shaped three-dimensional conductive structure, which not only ensures a stable connection with the insulating support column 3, but also provides a contact interface with the conductive switch 2.

[0124] Connection between the transverse support plate 11 and the insulating support column 3: The transverse support plate 11 serves as the mounting base for the conductive support 1 and is fixed to the top of the insulating support column 3 by fastening bolts 8 and other connecting components. Its transversely extending layout provides sufficient installation space, facilitating the use of tools for fastening operations.

[0125] Load bearing and transmission: During the opening and closing process, the insertion and extraction force, clamping force, and operational impact force applied by the conductive switch 2 are all transmitted to the transverse support plate 11 through the longitudinal support plate 12, and then evenly transmitted to the insulating support post 3 by the transverse support plate 11. The area and thickness design of the transverse support plate 11 ensures sufficient mechanical strength to prevent deformation or damage to the connection parts due to stress concentration.

[0126] Electrical entry point: The horizontal support plate 11 usually also serves as the connection point for external conductors, and is equipped with wiring holes or terminals for connecting to power lines.

[0127] The longitudinal support plate 12 is the conductive contact core;

[0128] Plug-in stationary contact: The longitudinal support plate 12 extends upward from the support base plate and is directly inserted between the two contact plates 21 of the conductive switch 2. This plug-in structure is the key to achieving "self-tightening" clamping contact in this invention—when the conductive switch 2 is closed, the two contact plates 21 clamp the two sides of the longitudinal support plate 12 under the action of elastic force, forming a surface contact conductive path.

[0129] The longitudinal support plate 12 has two conductive contact surfaces on both sides, corresponding to the inner surfaces of the two contact plate connecting plates 21. Compared with the traditional single-sided contact design, the double-sided contact effectively increases the conductive cross-sectional area, reduces the contact resistance, and improves the current carrying capacity.

[0130] The insertion process of the longitudinal support plate 12 provides guidance for the closing end of the conductive switch 2. Its end can be provided with a chamfer or arc transition to guide the contact plate 21 to slide smoothly into the predetermined position and realize "self-guided" closing.

[0131] The conductive support 1 of the present invention assigns the installation and fixing function to the horizontal support plate 11 and the conductive contact function to the vertical support plate 12, so that the two parts can be independently optimized according to their respective core requirements (such as the horizontal support plate 11 focusing on strength, and the vertical support plate 12 focusing on conductivity and wear resistance).

[0132] The L-shaped layout achieves both vertical (connected to the insulating support 3) and horizontal (plugged into the conductive switch 2) connection requirements within a limited space, resulting in a simple structure and high space utilization.

[0133] The engagement between the conductive support 1 and the conductive switch 2: The thickness of the longitudinal support plate 12 matches the gap between the two contact plates 21 (controlled by the fastening sleeve 9), forming a suitable interference fit to ensure that the contact plates 21 apply a stable clamping force to the longitudinal support plate 12 after closing. The outer surface of the longitudinal support plate 12 and the inner surface of the contact plates 21 form a surface contact conductive pair, with a large contact area and low resistance. The transverse support plate 11 is connected to the insulating support 3 through a fastening unit.

[0134] The 1L-type integrated conductive support structure integrates the mounting base and contact contacts on the same part (or component), reducing the number of parts, simplifying the assembly process, and avoiding the contact resistance and loosening risks that may occur when connecting multiple parts.

[0135] The transverse support plate 11 is responsible for stability, providing a solid installation foundation; the longitudinal support plate 12 is responsible for accuracy, providing a precise contact interface. Each performs its own function without interfering with the other, facilitating separate material selection and surface treatment (e.g., the contact surface of the longitudinal support plate 12 can be silver-plated to reduce contact resistance).

[0136] In this invention, the outer surface of the longitudinal support plate 12 is arc-shaped; the surface of the longitudinal support plate 12 that contacts the inner surface of the contact plate 21 in the conductive switch 2 is not a traditional plane, but a convex arc surface with a specific radius of curvature; in the initial stage of closing, when the two contact plates 21 of the conductive switch 2 are just fitted into the longitudinal support plate 12, the arc-shaped surface forms a line contact (or an extremely narrow surface contact) with the inner surface of the contact plate 21. This line contact state has low friction, which is conducive to the smooth sliding of the contact plate 21.

[0137] Reduced initial resistance: Compared to the "jamming" or "hard-on-hard" phenomenon that may occur when inserting a flat surface, the curved surface provides a smoother insertion path. The contact area between the contact plate 21 and the curved surface is small in the initial stage of closing, which significantly reduces the insertion resistance.

[0138] Furthermore, in this invention, the conductive support 1 also includes a support base 14; the support base 14 includes two lateral support plates 141; the contact plate 21 in the conductive switch 2 is in contact with the side of the lateral support plate 141; the lateral support plate 141 includes a support plate body; the support plate body is provided with a rotation clearance groove; the rotation clearance groove forms a swing positioning arc surface 142 on the support plate body. The support base is disposed on the transverse support plate.

[0139] The support base 14 is an important component of the conductive support 1, and its main function is to connect with the conductive switch 2. The two lateral support plates 141 of the present invention are arranged opposite to each other to form a U-shaped structure. The contact plate 21 in the conductive switch 2 is in contact with the side of the lateral support plate 141 to form a sliding contact surface.

[0140] The support plate body is the main part of the lateral support plate 141, providing structural strength and support rigidity. It is provided with a rotation clearance groove. The rotation clearance groove is a groove or notch opened on the support plate body; the groove forms a swing positioning arc surface 142 on the support plate body; the two contact plate connecting plates 21 of the conductive switch 2 are located on the outside of the two lateral support plates 141, and the inner side of the contact plate connecting plate 21 is in contact with the outer side of the lateral support plate 141.

[0141] The auxiliary pin 41 (set on the conductive switch 2) is essentially arranged in the rotation clearance groove, and its outer surface is in contact with the swing positioning arc surface 142 formed in the groove.

[0142] The rotating component 51 (main shaft) passes through the lateral support plate 141 (or cooperates with the lateral support plate 141) and serves as the rotation center of the conductive switch 2.

[0143] Lateral support plate 141: Lateral support and movement limit;

[0144] Lateral support is provided: Two lateral support plates 141 support the contact plate 21 of the conductive switch 2 from both sides, providing lateral support for the conductive switch 2. This support effectively prevents the conductive switch 2 from lateral swaying or twisting during opening and closing, ensuring that the conductive switch 2 always moves along the predetermined plane.

[0145] Limiting the range of motion: The fit between the outer side of the lateral support plate 141 and the inner side of the contact plate 21 constrains the lateral displacement of the conductive switch 2, forming a motion limit and preventing the conductive switch 2 from deviating from the correct track due to excessive operating force or external interference.

[0146] Increased system stiffness: The double support plate structure and the double contact plate 21 form a stable "four-plate clamping" configuration, which significantly improves the overall stiffness of the connection system between the conductive switch 2 and the conductive support 1, and is beneficial to resisting the huge electric repulsion force generated by the short circuit current.

[0147] Rotating clearance slot: Spatial clearance and functional integration;

[0148] The rotating clearance groove provides movement space for the auxiliary pin 41 on the conductive switch 2. When the conductive switch 2 swings around the main rotating component 51, the auxiliary pin 41 moves freely within the clearance groove, avoiding interference with the conductive support 1.

[0149] The swing positioning arc surface 142 is formed: the contour shape of the clearance groove (especially the side) is designed as a specific arc surface, which is the swing positioning arc surface 142 mentioned above. The auxiliary pin 41 slides on the arc surface, realizing precise guidance of the swing trajectory of the conductive switch 2.

[0150] The main rotating component 51 provides the center of rotation, while the swing positioning arc surface 142 (formed by a relief groove) provides a second constraint point. Together, they precisely define the movement trajectory of the conductive switch 2, avoiding radial wobble that might occur due to a single hinge point.

[0151] In actual design, the conductive support 1 can be selected to have a support base 14 as needed; in conventional design, one conductive support 1 is usually equipped with a support base 14, while the other conductive support 1 is not equipped with a support base 14.

[0152] The rotating clearance groove serves two functions simultaneously: spatial clearance and motion guidance. This eliminates the need for a separate guide structure for the auxiliary pin 41, simplifies the part structure, and reduces manufacturing costs.

[0153] The main rotating component 51 (rotation center) and the auxiliary pin 41 + swing positioning arc surface 142 (trajectory constraint) together constitute a complete constraint system for the movement of the conductive switch 2, making its movement trajectory highly deterministic and repeatable, ensuring the consistency and reliability of each opening and closing action.

[0154] In this invention, the rotating clearance groove forms a stepped platform 143 on the support plate body. Through the stepped platform 143, the rotational swing position of the conductive switch 2 can be limited, precisely controlling the opening and closing positions. The closing limit is as follows: when the conductive switch 2 is closed to the predetermined position, the auxiliary pin 41 (or other components that move with the conductive switch 2) contacts the stepped platform 143, forming a rigid block. This block precisely defines the closing endpoint position of the conductive switch 2, preventing excessive insertion of the conductive switch 2 due to excessive force or inertia, and avoiding overstress deformation or collision damage to the contact system.

[0155] Limit switch at opening position: During the opening process, the stepped platform 143 can also serve as a limit structure at the end of the opening, ensuring that the conductive switch 2 stops after opening to a safe break distance, which not only ensures sufficient isolation gap, but also prevents excessive rotation from interfering with other components.

[0156] In this invention, the swing positioning arc surface 142 has a stepped platform 143 at each end. The swing positioning arc surface 142 is responsible for guiding and limiting, ensuring that the conductive switch 2 moves along the correct trajectory; the stepped platform 143 is responsible for positioning and limiting, ensuring that the conductive switch 2 stops and remains in the correct position; together, they constitute a motion control system integrating guidance and positioning.

[0157] Furthermore, in this invention, the support base plate is connected to the insulating support column 3 via a fastening unit; the fastening unit includes multiple fastening mechanisms, each of which includes a fastening bolt 8; the fastening bolt 8 passes through the support base plate and is connected to the insulating support column 3; the fastening unit is mainly used for the connection between the conductive support 1 and the insulating support column 3.

[0158] The fastening unit in this invention includes multiple fastening mechanisms; it employs multiple (rather than a single) connection points to form a stable multi-point support structure.

[0159] The fastening bolt 8 passes through the mounting hole on the support base plate (usually the mounting hole on the transverse support plate 11) and connects to the pre-embedded screw hole or through hole on the top of the insulating support 3; it is the core component for transmitting load and achieving fixation.

[0160] The fastening bolts 8 press the support base plate firmly onto the top end face of the insulating support column 3, forming a rigid connection. By tightening the bolts, a preload is generated, ensuring sufficient friction between the support base plate and the insulating support column 3 to resist various external forces and torques generated during operation.

[0161] The axial preload provided by the fastening bolt 8 ensures a firm and rigid connection between the support base plate and the insulating support column 3, preventing the conductive support 1 from loosening, shifting, or rotating during use.

[0162] Under the influence of opening and closing operations, short-circuit current (generating electrodynamic repulsion), or external environmental factors (such as wind load), the conductive support 1 of the disconnecting switch will be subjected to complex forces and torques. The connection strength provided by the fastening unit must be sufficient to resist these external loads and ensure the structural integrity of the system.

[0163] Two or more fastening bolts 8 form a stable supporting polygon on the plane, which effectively restricts the translation of the conductive support 1 in the horizontal plane and its rotation about the vertical axis.

[0164] In applications that require withstanding large bending moments (such as the overturning moment generated by the extension of the conductive switch 2), multiple fastening mechanisms can provide sufficient bending stiffness.

[0165] Furthermore, the fastening mechanism described in this invention also includes an adjusting nut 81 and / or an adjusting washer 82 sleeved on the fastening bolt 8; the adjusting nut 81 and the adjusting washer 82 are optional or combined components of the fastening mechanism, and their configuration is flexible: the adjusting nut 81 and the adjusting washer 82 are both sleeved on the fastening bolt 8, usually located between the support base plate and the nut of the fastening bolt 8; they are mainly used to adjust the longitudinal height of the nut in the fastening bolt 8, thereby realizing the control of the closed position of the conductive switch 2; they are convenient to cooperate with the stepped platform 143 mentioned above, and ensure the stability of the conductive switch 2 when closed as much as possible; and prevent the conductive switch 2 from being suspended on one side.

[0166] At the same time, it can also compress the fastening sleeve 9, so that the fastening sleeve 9 can fit and contact the end face of the conductive support 1 without affecting normal assembly.

[0167] The lower support of the conductive switch can be provided by controlling the number or thickness of the adjusting nut and / or adjusting shims.

[0168] Furthermore, in this invention, the contact plate 21 includes a connecting plate base 211, and the connecting plate base 211 has a flange plate 212 on at least one side; the flange plate 212 is arranged intersecting with the connecting plate base; the connection between the connecting plate base and the flange plate 212 adopts an arc-shaped transition; the cooperation between the flange plate 212 and the connecting base ensures the structural strength of the contact plate 21, and when the connecting base is arranged longitudinally, the flange plate 212 is arranged at an inclination, so that the lower ends of the two contact plates 21 form a flared structure, which facilitates the sleeve of the conductive switch 2 on the longitudinal support plate 12 in the conductive support 1 when closed later.

[0169] Meanwhile, the longitudinal support plate 12 in the conductive support 1 is provided with an avoidance notch 13 at its end; the purpose of the avoidance notch 13 is to reduce the lateral dimension of the upper end of the longitudinal support plate 12 in the conductive support 1, so that the conductive switch 2 can be sleeved on the conductive support 1.

[0170] In this invention, the flange plate 212 is equivalent to adding reinforcing ribs to the edge of the flat plate, which significantly improves the bending section modulus of the contact plate 21 in the direction perpendicular to the plate surface. When subjected to the axial pressure of the support spring 103, the insertion resistance during closing, and the electrodynamic repulsion force generated by the short-circuit current, the flange structure effectively prevents the contact plate 21 from bending and deforming.

[0171] Ensuring a flat contact surface: The inner side of the contact plate 21 is the key conductive surface that contacts the longitudinal support plate 12. The rigidity provided by the flange plate 212 ensures that the inner side remains flat during long-term operation and will not warp or dent due to local stress, thus ensuring a uniform distribution of contact pressure.

[0172] Resistance to lateral forces: During the opening and closing process, the contact plate 21 may be subject to restraining forces from the lateral support plate 141. The flange plate 212 enhances the ability of the plate to resist lateral bending and maintains the parallelism between the double contact plates 21.

[0173] The flange reinforcement of the contact plate 21 enables it to withstand greater clamping force and bending load, providing a structural basis for self-tightening contact.

[0174] The clearance notch 13 of the longitudinal support plate 12 ensures that even if there are manufacturing tolerances or operational deviations during the closing process, the contact plate connecting plate 21 can be smoothly and without damage fitted into the longitudinal support plate 12.

[0175] The two work together to achieve a perfect balance between smooth closing and reliable clamping.

[0176] In summary, the self-tightening disconnect switch disclosed in this invention has significant advantages in terms of electrical connection reliability, mechanical stability, ease of installation and maintenance, and long-term durability through several innovative structural designs.

[0177] 1. Excellent self-adaptation and self-tightening capabilities;

[0178] Linkage structure 7 and elastic compensation: By providing a support spring 103 on the linkage bolt 102, this structure can apply continuous elastic tension to the two contact plates 21. During long-term operation, even if the contacts develop small gaps due to wear, vibration, or thermal expansion and contraction, the support spring 103 can automatically compensate to ensure that the contact plates 21 and the conductive support 1 always maintain a tight fit.

[0179] Reduced contact resistance: This elastic clamping mechanism effectively reduces the resistance of the contact surface, reduces heat generation caused by poor contact, thereby improving conductivity and extending equipment life.

[0180] 2. Optimized mechanical transmission and positioning accuracy;

[0181] Swing positioning and avoidance design: An auxiliary pin 41 is set in the rotating unit to cooperate with the swing positioning arc surface 142 on the conductive support 1. This design not only restricts the rotation trajectory of the conductive switch 2, ensuring its smooth and jam-free operation during opening and closing, but also provides precise guidance for the movement of the switch through structures such as the "avoidance groove".

[0182] Preventing excessive wear: The stepped platform 143 and the arc-shaped surface ensure that the rotating part 51 is subjected to uniform force during frequent operation, avoiding mechanical wear or deformation caused by stress concentration and improving the smoothness of operation.

[0183] 3. Enhanced structural strength and electrical stability

[0184] The double contact plate 21 and the flange design: The contact plate 21 adopts an intersecting structure of "connecting plate base 211 + flange plate 212", and the connection is transitioned with an arc surface. This design greatly improves the bending strength and rigidity of the contact plate 21, making it less prone to deformation when subjected to electric repulsion or external impact, and ensuring the alignment accuracy between the moving and stationary contacts.

[0185] Multi-point limiting and isolation: The fastening sleeve 9 and isolation bushing 101 in the limiting mechanism precisely control the distance between the two contact plate connecting plates 21, preventing the connecting plates from concave due to excessive bolt tightness or loosening due to excessive looseness.

[0186] 4. Highly reliable conductive connection structure

[0187] The three-dimensional structure of the conductive support 1: The conductive support 1 adopts an "L"-shaped or similar design combining a transverse support plate 11 and a longitudinal support plate 12. The longitudinal support plate 12 is inserted between the conductive switches 2, and its outer surface is arc-shaped. This structure increases the effective contact area between the conductive switches 2 and the support. At the same time, the arc-shaped design is conducive to automatically guiding the position of the switches during opening and closing, achieving a "self-centering" effect.

[0188] The clearance notch 13 design: The clearance notch 13 at the end of the conductive support 1 effectively avoids hard collisions caused by positional deviation at the moment of closing, protecting the critical contact surface from damage.

[0189] The core advantage of the self-tightening disconnect switch disclosed in this invention lies in its use of the elastic complementarity of mechanical structures to solve the problems of loosening, overheating, and jamming that easily occur in traditional disconnect switches after long-term operation. By integrating the self-tightening function (spring), precise guidance (arc surface and pin shaft), and reinforced structure (flanged edge and three-dimensional support) into one unit, it not only improves the reliability of the product throughout its life cycle but also reduces operation and maintenance costs, making it particularly suitable for power system scenarios with high requirements for equipment stability and maintenance-free periods.

[0190] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A self-closing disconnector, characterized in that Includes a base; the base is provided with at least two insulating supports; Each insulating support is equipped with a conductive support, and the conductive supports are electrically connected and disconnected through a disengageable conductive switch. One end of the conductive switch is rotatably connected to a conductive support on one side, and the other end can be connected to a conductive support on the other side. The conductive switch includes two spaced-apart contact plates connected together by a linkage structure.

2. The self-tightening disconnector according to claim 1, characterized in that, The linkage structure includes a linkage mechanism that passes through the conductive switch, and the linkage mechanism includes a linkage bolt; the linkage bolt passes through two contact plates in the conductive switch.

3. A self-tightening disconnector according to claim 2, characterized in that, The linkage structure further includes a limiting mechanism; the limiting mechanism includes a fastening sleeve and / or a support spring disposed on the linkage bolt; The fastening sleeve is arranged in the area between the two contact plates; The support spring is arranged in the area between the nut or bolt and the adjacent conductive switch in the linkage bolt.

4. A self-tightening disconnector according to claim 3, characterized in that, The limiting mechanism also includes an isolation bushing; the isolation bushing is sleeved on the linkage bolt, the isolation bushing includes a bushing body, and the bushing body is provided with an assembly groove; one end of the support spring is arranged in the assembly groove in the isolation bushing; the other end presses against the conductive switch.

5. A self-tightening disconnector according to claim 1, characterized in that, The linkage structure also includes a rotating unit disposed on the conductive switch; The rotating unit includes a rotating mechanism and an auxiliary mechanism; the rotating mechanism includes a rotating component; the conductive switch is rotatably connected to a conductive support via the rotating component. The auxiliary mechanism includes an auxiliary pin that can rotate around a rotating component following the conductive switch; the rotating component is connected to a conductive support; the outer side of the auxiliary pin is in contact with the conductive support; and the conductive support is provided with a swing positioning arc surface.

6. A self-tightening disconnector according to claim 1, characterized in that, The conductive support includes a support base plate, which includes a transverse support plate and a longitudinal support plate; the conductive support is connected to the insulating support column through the transverse support plate, and the conductive support is inserted into the conductive switch through the longitudinal support plate.

7. A self-tightening disconnector according to claim 1, characterized in that, The outer side of the longitudinal support plate is arc-shaped; the end of the longitudinal support plate in the conductive support is provided with an avoidance notch.

8. A self-tightening disconnector according to claim 1, characterized in that, The support base plate is connected to the insulating support column via a fastening unit; the fastening unit includes multiple fastening mechanisms, each of which includes a fastening bolt; the fastening bolt passes through the support base plate and is connected to the insulating support column.

9. A self-tightening disconnector according to claim 1, characterized in that, The fastening mechanism also includes an adjusting nut and / or adjusting shim sleeved on the fastening bolt; by controlling the adjusting nut and / or adjusting shim, the conductive switch can be supported.

10. A self-tightening disconnector according to claim 1, characterized in that, The contact plate includes a plate base, and the plate base has a flange on at least one side; the flange and the plate base are arranged to intersect; the connection between the plate base and the flange is made of an arc-shaped surface transition.

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