Large-current type flexible contact finger
By designing high-current flexible contact fingers and utilizing the synergistic effect of movable and fixed components, the stability problem of conductive contact parts under high current and vibration scenarios is solved, achieving long-term reliable conductive contact and extending life.
Patent Information
- Application Number
- CN202511163184.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-19
- Publication Date
- 2025-10-10
AI Technical Summary
Traditional conductive contact components are easily displaced or loosened due to electrodynamic forces and mechanical vibrations in high current scenarios, affecting contact stability. Elastic fatigue also leads to poor contact, increasing power transmission losses and the risk of equipment failure.
A high-current flexible contact finger is designed, which adopts the synergistic effect of movable components and fixed components, utilizes copper alloy materials and multi-point contact structure, and compensates for the deformation caused by electrodynamic force and vibration through the deformation of the movable component, while the mechanical locking of the fixed component maintains stable contact pressure.
It improves the reliability and life of conductive contact, prevents poor contact, reduces power transmission loss and equipment failure risks, and extends service life.
Smart Images
Figure CN120767142A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of power equipment connection, in particular to a high-current flexible contact finger. Background Art
[0002] In modern power systems and numerous industrial applications involving high-current transmission, reliable conductive contact is a key factor in ensuring the normal operation of equipment and the efficient transmission of electrical energy. For example, busbar connections in substations, electrical interfaces in large motors, and plug-in connectors for various high-power electrical equipment all require contact components that can reliably carry high currents. The performance of these contact components directly impacts the operational stability, safety, and service life of the entire power system or equipment.
[0003] Traditional conductive contact components often face numerous limitations when handling high current scenarios. For one thing, the passage of high current generates electrodynamic forces, which can easily cause the contact components to shift or loosen over time, affecting contact stability. Furthermore, in actual use, frequent mechanical vibrations and external forces such as plugging and unplugging are inevitable, placing higher demands on the elasticity and stability of the contact components. Conventional contact components typically utilize conventional elastic structures, which are prone to elastic fatigue after prolonged exposure to these various external forces. Elastic fatigue significantly reduces elastic deformation capacity, making it impossible for the contact components to maintain stable contact pressure, leading to poor contact. Poor contact not only results in increased power transmission losses and equipment overheating, but in severe cases can even cause electrical failures, impacting the normal operation of the entire system, increasing repair costs and downtime, and causing significant inconvenience and economic losses to production and life. Summary of the Invention
[0004] (1) Technical problems solved
[0005] In response to the shortcomings of the existing technology, the present invention provides a high-current flexible contact finger, which solves the problem that in actual use environment, the contact parts are easily displaced or loosened under long-term action, affecting the stability of the contact, and are inevitably accompanied by frequent mechanical vibrations and external force interference such as plugging and unplugging operations.
[0006] (2) Technical solution
[0007] In order to achieve the above object, the present application provides the following technical scheme: A large-current flexible contact finger, comprising a flexible contact finger body, the flexible contact finger body can form multiple deformation modes, including straight bar shape and roll round type; further comprising a movable assembly for resisting the inner side of the flexible contact finger body; a fixed assembly for limiting the movable assembly after resisting the flexible contact finger body; the movable assembly comprises: a rotating rod, the rotating rod is rotatably connected to the inner side of the flexible contact finger body, a rotating disc is fixedly installed on the top of the rotating rod, an inclined rod is installed on the outer side of the rotating disc, the inclined rod is attached to the inner side of the flexible contact finger body, a sliding rod is slidably connected in the rotating disc, the sliding rod penetrates the rotating disc, a resisting block is fixedly installed on the outer side of the sliding rod, a fixed disc is arranged on the surface of the resisting block, the fixed disc is fixedly installed in the inner side of the flexible contact finger body, and the resisting block is slidably connected to the inner side of the fixed disc
[0008] Preferably, the surface of the fixed disc is provided with a groove, and the surface of the rotating disc is provided with an arc-shaped groove.
[0009] Preferably, the fixed assembly comprises: a fixed column, the fixed column is fixedly installed on the inner side of the flexible contact finger body, a movable rod is hingedly connected to the inner side of the fixed column, the movable rod is attached to a limiting block on the outer side of the movable rod, and the limiting block is fixedly installed on the outer wall of the fixed column.
[0010] Preferably, a torsional spring is fixedly installed on the outer wall of the movable rod.
[0011] Preferably, an active disc is fixedly installed on the top of the rotating disc, the active disc penetrates the fixed column, a limiting rod is hingedly connected to the outer side of the active disc, a return spring is fixedly installed on the inner side of the limiting rod, and the return spring is fixedly installed on the outer wall of the active disc.
[0012] Preferably, the resisting block is provided with two groups, and the two groups of resisting blocks are symmetrically arranged with the center line of the rotating disc as the axis of symmetry, and each of the two groups of resisting blocks is provided with six blocks.
[0013] Preferably, the flexible contact finger body is flexible in shape and forms a multi-point contact, and the flexible contact finger body is made of copper alloy with good conductivity and high elastic strength.
[0014] Preferably, the flexible contact finger body has a large enough compression amount, and each conductive unit of the flexible contact finger body is composed of a single elastic sheet.
[0015] Preferably, the inner side of the movable rod and the limiting rod are both L-shaped in cross section, and the cross section of the limiting block is rectangular.
[0016] (Three) beneficial effects
[0017] Compared with the prior art, the present invention provides a high-current flexible contact finger with the following beneficial effects:
[0018] 1. This high-current flexible contact finger utilizes the setting of the movable component. Initially, the movable component of the rolled body does not conflict, the rotating rod is stationary, the oblique rod is not squeezed, and the conflict block is in the initial position; the movable rod in the fixed component fits the limiting block, and the limiting rod is not limited. When the contact finger retracts due to elastic fatigue due to electric power, vibration, etc., it will conflict with the oblique rod to drive the rotating rod to rotate, driving the turntable to rotate. The oblique rod squeezes the body to cause deformation. At the same time, the rotation of the turntable causes the sliding rod to drive the conflict block to slide. The two sets of symmetrical conflict blocks evenly conflict with the inside, enhancing the contact pressure to ensure the compression amount, preventing poor contact caused by fatigue, ensuring conductive reliability and extending service life.
[0019] 2. This high-current type flexible contact finger is set up using a fixed component. The rotation of the turntable drives the rotation of the movable disk, and the movable disk passes through the fixed column and drives the limiting rod to rotate. When the interference block reaches the preset position, the limiting rod rotates to the position corresponding to the movable rod, and the reset spring pushes it to expand. Because the movable rod and the limiting rod are both L-shaped, the two are engaged, and the movable rod is limited by the rectangular limiting block and cannot be reversed. The position of the movable disk and the turntable is mechanically locked, so that the interference block and the inclined rod remain in an interference state. This structure prevents the attenuation of contact pressure due to interference failure, ensures long-term stable conductivity, enhances structural reliability, avoids contact loosening caused by vibration and external force, and ensures continuous and stable contact pressure.
[0020] 3. This high-current flexible contact utilizes a flexible contact body to reduce resistance and withstand harsh environments. The contact body is electroplated, achieving low resistance through good contact and low temperature rise when carrying high currents. As an elastic element, the body deforms to compensate for machining errors during assembly, reducing the cost of mating parts. Constructed from a physically and chemically stable copper alloy, it offers a long lifespan in non-extreme operating conditions and high-frequency plugging and unplugging. Tests have verified an expected lifespan of over 20 years or more, or over 100,000 plugging and unplugging cycles. The electroplating layer enhances corrosion resistance, and the stability of the copper alloy, combined with the structural design, ensures reliable electrical performance and reduces operational costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the front view structure of a high-current type flexible contact finger with a rolled shape proposed by the present invention;
[0022] Figure 2 This is a schematic diagram of the front view structure of a straight strip-shaped high-current flexible contact finger proposed by the present invention;
[0023] Figure 3 This is a schematic diagram of the front view of the structure of a high-current flexible contact finger movable component proposed by the present invention;
[0024] Figure 4 This is a schematic diagram of the front view of a high-current flexible contact finger fixing plate proposed by the present invention;
[0025] Figure 5 This is a schematic diagram of the front view of a high-current flexible contact finger turntable proposed by the present invention;
[0026] Figure 6 This is a schematic front view of the structure of a high-current flexible contact finger fixing assembly proposed by the present invention.
[0027] In the figure: 1. Flexible contact finger body; 2. Movable component; 21. Rotating rod; 22. Rotating disk; 23. Oblique rod; 24. Sliding rod; 25. Contact block; 26. Fixed disk; 260. Groove; 220. Arc groove; 3. Fixed component; 31. Fixed column; 32. Movable rod; 33. Limiting block; 34. Torsion spring; 35. Movable disk; 36. Limiting rod; 37. Return spring. DETAILED DESCRIPTION
[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0029] See also Figure 1 - Figure 6 As shown, a high-current flexible contact finger includes a flexible contact finger body 1. The flexible contact finger body 1 can be formed into a variety of deformation forms, including straight strips and curled shapes. The flexible contact finger body 1 has a basic shape and multiple deformations, suitable for different occasions, and has a simple structure and low cost. The special structure allows a large deformation, so the insertion and removal force is moderate, the insertion and removal are convenient, and the conductivity is reliable. The special structure allows a large deformation, so the installation precision requirements are low, and the flexible contact finger body can withstand long-term vibration in the working state. It has a long service life and an effective insertion and removal number of more than 100,000 times. The current carrying capacity of a single spring unit can be changed by changing the material thickness.
[0030] It also includes a movable component 2 for resisting the inner side of the flexible contact finger body 1;
[0031] The fixed component 3 is used to restrict the movable component 2 after it contacts the flexible contact body 1;
[0032] First, the movable component 2 includes: a rotating rod 21, which is rotatably connected to the inner side of the flexible contact body 1, a rotating disk 22 is fixedly installed on the top of the rotating rod 21, and an inclined rod 23 is installed on the outside of the rotating disk 22. The inclined rod 23 fits the inner side of the flexible contact body 1, and a sliding rod 24 is slidably connected to the inside of the rotating disk 22. The sliding rod 24 passes through the rotating disk 22, and a resistance block 25 is fixedly installed on the outside of the sliding rod 24. A fixed disk 26 is provided on the surface of the resistance block 25, and the fixed disk 26 is fixedly installed inside the flexible contact body 1. The resistance block 25 is slidably connected to the inner side of the fixed disk 26, and a groove 260 is provided on the surface of the fixed disk 26. An arc groove 220 is provided on the surface of the rotating disk 22. The arc groove 220 provided on the surface of the rotating disk 22 can be used to push the sliding rod 24 to drive the resistance block 25 to slide in the groove 260 of the fixed disk 26 when the rotating disk 22 rotates.
[0033] Secondly, the fixing component 3 includes: a fixing column 31, the fixing column 31 is fixedly installed on the inner side of the flexible touch finger body 1, a movable rod 32 is hinged on the inner side of the fixing column 31, and a limiting block 33 is attached to the outer side of the movable rod 32. The limiting block 33 is fixedly installed on the outer wall of the fixing column 31, and a torsion spring 34 is fixedly installed on the outer side of the movable rod 32. The torsion spring 34 is fixedly installed on the outer wall of the movable rod 32. The torsion spring 34 installed on the outer side of the movable rod 32 can achieve the effect of resetting the movable rod 32 after it has completed its swing.
[0034] Furthermore, a movable disk 35 is fixedly installed on the top of the turntable 22. The movable disk 35 passes through the fixed column 31. A limiting rod 36 is hinged on the outside of the movable disk 35. A return spring 37 is fixedly installed on the inside of the limiting rod 36. The return spring 37 is fixedly installed on the outer wall of the movable disk 35. The return spring 37 on the inside of the limiting rod 36 can achieve the effect of resetting after the limiting rod 36 moves.
[0035] There are two groups of interference blocks 25 , and both groups of interference blocks 25 are symmetrically arranged with the center line of the turntable 22 as the symmetry axis, and each group of the two groups of interference blocks 25 has six blocks.
[0036] The flexible contact finger body 1 forms flexible multi-point contacts with its outer shape. The flexible contact finger body 1 is made of a copper alloy with good electrical conductivity and high elastic strength, and has excellent electrical conductivity and plug-in performance when a larger thickness of material is allowed.
[0037] The flexible contact finger body 1 has a sufficiently large compression capacity. Each conductive unit of the flexible contact finger body 1 is composed of a single spring. The rated current is increased by increasing the number of spring units.
[0038] The inner side of the movable rod 32 and the cross section of the limiting rod 36 are both L-shaped, and the cross section of the limiting block 33 is rectangular.
[0039] Working principle: The high-current flexible contact realizes the interference and fixation of the flexible contact body 1 through the coordinated action of the movable component 2 and the fixed component 3. Combined with its own material properties and structural design, it ensures reliable conductive contact in high-current scenarios. The specific working process is as follows: the flexible contact body 1 is rolled into a circular shape according to the usage scenario, and the movable component 2 and the fixed component 3 inside it are in an initial non-interference state: the rotating rod 21 is not rotated by force, the turntable 22 is stationary, the inclined rod 23 does not squeeze the inner side of the contact body, and the sliding rod 24 drives the interference block 25 to the initial position inside the fixed disk 26; in the fixed component 3, the movable rod 32 naturally fits the limiting block 33 under the action of the torsion spring 34, and the limiting rod 36 shrinks to the outside of the movable disk 35 under the action of the reset spring 37, and does not form a limit with the movable rod 32. When it is necessary to use the movable group When component 2 enhances the contact pressure of the flexible contact finger body 1, it is subjected to external forces such as electric power under large current, frequent mechanical vibration, and plugging and unplugging operations for a long time. The elastic components of the contact finger are prone to elastic fatigue, resulting in a decrease in elastic deformation ability, inability to maintain stable contact pressure, and causing poor contact. When the elastic deformation ability of the flexible contact finger body 1 decreases and retracts, it will resist the surface of the inclined rod 23 and drive the rotating rod 21 to rotate. The rotating rod 21 drives the turntable 22 fixed on the top to rotate synchronously, and achieves initial resistance by squeezing the contact finger body, and uses the elastic properties of the copper alloy of the contact finger body to produce slight deformation; at the same time, when the turntable 22 rotates, the sliding rod 24 slidably connected inside it slides radially under the guidance of centrifugal force or the arc groove 220 of the turntable 22, driving the resistance block 25 fixed on the outside to slide in the groove 260 of the fixed disk 26. Since the two groups of contact blocks 25 are symmetrically distributed about the center line of the turntable 22 and each group has six blocks, the contact blocks 25 evenly contact the inner side of the flexible contact finger body 1 during sliding, further enhancing the contact pressure between the flexible contact finger body 1 and the docking component through multi-point contact, ensuring sufficient compression, and preventing poor contact problems caused by elastic fatigue, thereby ensuring conductive reliability and extending service life in high current scenarios.
[0040] When the turntable 22 rotates, it simultaneously drives the movable disk 35 fixed on the top to rotate. The movable disk 35 passes through the fixed column 31 and drives the limiting rod 36 hinged on the outside to rotate. When the interference block 25 reaches the preset interference position, the limiting rod 36 rotates with the movable disk 35 to the position corresponding to the movable rod 32 inside the fixed column 31, and the return spring 37 releases the elastic force to push the limiting rod 36 to expand; since the cross-sections of the movable rod 32 and the limiting rod 36 are both L-shaped, the expanded limiting rod 36 and the movable rod 32 are engaged with each other, and the outer side of the movable rod 32 is limited by the rectangular limiting block 33 and cannot rotate in the opposite direction, thereby locking the position of the movable disk 35 and the turntable 22 through the mechanical structure, so that the interference block 25 and the oblique rod 23 maintain the interference state with the flexible contact finger body 1, preventing the contact pressure from attenuating due to the failure of the interference state, thereby ensuring long-term stable conductivity and enhancing structural reliability.
[0041] In order to further reduce the contact resistance of the watch strap and its ability to cope with harsh environments, the surface of the flexible contact body 1 of the watch strap will be electroplated. Since good contact connection is effectively guaranteed, the flexible contact body 1 has a small contact resistance and still has a small temperature rise under large current carrying conditions. Since the flexible contact body 1 is an elastic element and has a certain ability of elastic deformation, it can compensate for certain processing position errors during the assembly process and reduce the processing cost of mating parts. Copper alloy has stable physical and chemical properties. In non-extreme working conditions and extremely frequent plugging and unplugging applications, the flexible contact body 1 made of it has a high service life. According to experiments, its expected life can reach more than 20 years or more than 100,000 plugging and unplugging times.
[0042] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.
Claims
1. A high-current flexible contact finger, comprising a flexible contact finger body (1), characterized in that: The flexible contact finger body (1) can be formed into a variety of deformation forms, including a straight bar shape and a curled round shape; It also includes a movable component (2) for resisting the inner side of the flexible contact finger body (1); A fixed component (3) is used to restrict the movable component (2) after it contacts the flexible contact finger body (1); The movable component (2) comprises: a rotating rod (21), the rotating rod (21) is rotatably connected to the inner side of the flexible contact finger body (1), a rotating disk (22) is fixedly installed on the top of the rotating rod (21), an inclined rod (23) is installed on the outer side of the rotating disk (22), the inclined rod (23) is fitted on the inner side of the flexible contact finger body (1), a sliding rod (24) is slidably connected inside the rotating disk (22), the sliding rod (24) passes through the rotating disk (22), a resistance block (25) is fixedly installed on the outer side of the sliding rod (24), a fixed disk (26) is provided on the surface of the resistance block (25), the fixed disk (26) is fixedly installed inside the flexible contact finger body (1), and the resistance block (25) is slidably connected to the inner side of the fixed disk (26).
2. The high-current flexible contact finger according to claim 1, characterized in that: A groove (260) is provided on the surface of the fixed disk (26), and an arc-shaped groove (220) is provided on the surface of the rotating disk (22).
3. The high-current flexible contact finger according to claim 1, characterized in that: The fixing assembly (3) comprises: a fixing column (31), the fixing column (31) is fixedly mounted on the inner side of the flexible contact finger body (1), a movable rod (32) is hingedly connected to the inner side of the fixing column (31), and a limiting block (33) is attached to the outer side of the movable rod (32), and the limiting block (33) is fixedly mounted on the outer wall of the fixing column (31).
4. The high-current flexible contact finger according to claim 3, characterized in that: A torsion spring (34) is fixedly mounted on the outside of the movable rod (32), and the torsion spring (34) is fixedly mounted on the outer wall of the movable rod (32).
5. The high-current flexible contact finger according to claim 3, characterized in that: A movable disk (35) is fixedly mounted on the top of the rotating disk (22), and the movable disk (35) passes through the fixed column (31). A limiting rod (36) is hinged on the outer side of the movable disk (35), and a return spring (37) is fixedly mounted on the inner side of the limiting rod (36). The return spring (37) is fixedly mounted on the outer wall of the movable disk (35).
6. The high-current flexible contact finger according to claim 1, characterized in that: The said conflicting blocks (25) are provided in two groups, and the said conflicting blocks (25) in the two groups are symmetrically arranged with the center line of the rotating disk (22) as the symmetry axis, and each group of the said conflicting blocks (25) is provided with six blocks.
7. The high-current flexible contact finger according to claim 1, characterized in that: The flexible contact finger body (1) forms flexible multi-point contacts with its outer shape, and the flexible contact finger body (1) is made of a copper alloy with good electrical conductivity and high elastic strength.
8. The high-current flexible contact finger according to claim 1, characterized in that: The flexible contact finger body (1) has a sufficiently large compression amount, and each conductive unit of the flexible contact finger body (1) is composed of a single spring piece.
9. The high-current flexible contact finger according to claim 5, characterized in that: The inner side of the movable rod (32) and the cross section of the limiting rod (36) are both L-shaped, and the cross section of the limiting block (33) is rectangular.