High-precision static spring

Abstract

The utility model provides a high-precision static spring, which relates to the technical field of static springs and comprises a static spring body formed by spirally surrounding three layers of composite structures clockwise / anticlockwise. The three-layer composite structure is formed by a first steel layer, a copper wire and a second steel layer through a hot rolling composite process; end face frames are fixed to the two ends of the static spring body in a laser welding mode, and the end face frames are made of copper alloy materials. Through the three-layer composite structure design, the high strength of the steel layer and the high conductivity of the copper wire are combined, and the stress concentration problem of a traditional circular-section static spring is remarkably solved; the symmetrical coating structure of the copper wire and the steel layer ensures the rigidity of the static spring, meanwhile, the copper wire is directly in surface contact with the end face frame, the conductive efficiency is improved by 40%-60%, and the high requirements of precision electronic equipment for signal transmission stability and current bearing capacity are met.

Description

Technical Field

[0001] This utility model relates to the field of static spring technology, and in particular to a high-precision static spring. Background Technology

[0002] As a key mechanical component, the stationary spring plays an important role in various precision instruments and electronic devices;

[0003] Traditional circular cross-section static springs have some limitations in practical applications. When a circular cross-section static spring is subjected to force, the stress distribution inside it is often uneven, which can lead to stress concentration in certain local areas, thereby accelerating the initiation and propagation of fatigue cracks. This problem not only shortens the service life of the static spring, but also poses a threat to the stability and reliability of the system.

[0004] Secondly, for specific application scenarios, users have higher requirements for the stiffness and conductivity of the static spring. In precision contact points inside electronic devices, the stiffness of the static spring is directly related to its contact performance and the stability of signal transmission, while good conductivity is a key factor in ensuring effective current transmission. Therefore, optimizing both the stiffness and conductivity of the static spring is particularly important for improving the operating efficiency and user experience of electronic devices.

[0005] Based on the above-mentioned shortcomings, we propose a high-precision static spring. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies, change the deficiencies of traditional circular cross-section static springs in terms of stress distribution and mechanical properties, meet the high requirements for conductivity and stiffness, and improve the performance and application range of static springs.

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

[0008] A high-precision static spring includes a static spring body, wherein the static spring body is formed by a three-layer composite structure spirally wound in a clockwise / counterclockwise direction;

[0009] The three-layer composite structure is formed by hot rolling composite process of a first steel layer, copper wire and a second steel layer.

[0010] The two ends of the static spring body are laser-welded to an end face frame, which is made of copper alloy.

[0011] Furthermore, the first and second steel layers completely encapsulate the copper wire in a symmetrical manner.

[0012] Furthermore, the copper wires at both ends of the static spring body are polished and then make surface contact with the end face frame.

[0013] Furthermore, the copper wire is made of single-strand pure copper, and the thickness of the first steel layer and the second steel layer is 1 / 4 to 1 / 2 of the diameter of the copper wire.

[0014] Furthermore, the ends of the first and second steel layers are designed with rounded surfaces.

[0015] Furthermore, a coating is provided around the first steel layer and the second steel layer. The coating may be electroplated zinc or electroless nickel-phosphorus alloy, and the coating thickness is 8-15 μm.

[0016] Furthermore, the four sides of the end face frame are of the same length, the length of one side of the end face frame is greater than the diameter of the stationary spring body, and the end face frame is provided with limiting edges around the end facing the stationary spring body. The thickness of the limiting edges is the same as the portion of the end face frame whose length is greater than the diameter of the stationary spring body.

[0017] Furthermore, the pitch of the spiral winding is 0.2-0.5 times the diameter of the static spring body, and the uniformity deviation of the gap between adjacent spiral windings is ≤5%.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] By using a three-layer composite structure (steel-copper-steel) design, combining the high strength of the steel layer with the high conductivity of the copper wire, the stress concentration problem of traditional circular cross-section static springs is significantly improved. The precise control of the helical spacing (0.2-0.5 times the body diameter) and the uniformity deviation of the gap (≤5%) makes the stress distribution more uniform, increases the fatigue life by more than 30%, and delays the initiation and propagation of cracks.

[0020] The symmetrical coating structure of copper wire (single strand pure copper) and steel layer ensures the stiffness of the static spring while allowing the copper wire to directly contact the end frame (copper alloy), thus improving the conductivity efficiency by 40%-60% and meeting the high requirements of precision electronic equipment for signal transmission stability and current carrying capacity. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of a high-precision static spring provided by this utility model;

[0022] Figure 2 A schematic diagram of the overall structure of a high-precision static spring provided by this utility model;

[0023] Figure 3 A magnified schematic diagram of a partial structure A of a high-precision static spring provided by this utility model;

[0024] Figure 4 This utility model provides an anatomical plan view of a three-layer composite structure for a high-precision static spring.

[0025] Legend: 1. Static spring body;

[0026] 2. Three-layer composite structure; 21. First steel layer; 22. Copper wire; 23. Second steel layer; 24. Arc surface; 25. Coating;

[0027] 3. End face frame; 31. Limiting edge. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Example 1

[0033] like Figure 1-4 As shown, this utility model provides a technical solution: a high-precision static spring, including a static spring body 1. The static spring body 1 has a certain degree of flexibility in the form of a spiral structure to adapt to different installation environments and force requirements. The static spring body 1 is formed by a three-layer composite structure 2 spirally wound in a clockwise or counterclockwise direction.

[0034] The three-layer composite structure 2 is formed by a first steel layer 21, copper wire 22 and a second steel layer 23 through a hot rolling composite process. The hot rolling composite process enables the materials of each layer to achieve atomic-level bonding under high temperature and high pressure, ensuring that the three layers are tightly bonded into a whole, without problems such as delamination or relative sliding, thus ensuring the stability and reliability of the overall structure of the static spring. The first steel layer 21 and the second steel layer 23 provide the necessary stiffness and strength for the static spring, enabling it to withstand a certain external force without excessive deformation.

[0035] Copper wire 22, with its excellent conductivity, ensures that the current can be transmitted efficiently in the static spring.

[0036] The two ends of the stationary spring body 1 are fixed with end face frames 3 by laser welding. The end face frames 3 are made of copper alloy. Laser welding technology has the advantages of high welding precision, small heat-affected zone and high welding strength. It can ensure that the end face frames 3 and the stationary spring body 1 are firmly connected and will not loosen due to vibration or external force. The copper alloy end face frames 3 not only have good conductivity and can form a good electrical connection with the copper wire 22 inside the stationary spring body 1, but also have certain strength and corrosion resistance, and can adapt to different working environments.

[0037] Example 2

[0038] like Figure 1-4 As shown, the first steel layer 21 and the second steel layer 23 completely wrap the copper wire 22 in a symmetrical manner. This symmetrical wrapping structure allows the copper wire 22 to uniformly transfer stress to the steel layers on both sides when subjected to external force, avoiding excessive local stress on the copper wire 22 and causing deformation or damage. At the same time, the steel layers provide good protection for the copper wire 22, preventing it from being corroded by the external environment and mechanically damaged.

[0039] After polishing, the copper wires 22 at both ends of the stationary spring body 1 form a surface contact with the end face frame 3. The polishing process can remove the oxide layer, impurities and burrs on the surface of the copper wires 22, making the surface of the copper wires 22 smoother and flatter, thus forming a tight surface contact with the end face frame 3. Compared with the traditional point contact or line contact, the surface contact method greatly increases the conductive contact area, effectively reduces the contact resistance, improves the current transmission efficiency, and reduces energy loss.

[0040] The copper wire 22 is made of single strand pure copper. Pure copper has extremely high electrical conductivity, which can ensure that there is almost no loss in the transmission of current. The thickness of the first steel layer 21 and the second steel layer 23 is 1 / 4 to 1 / 2 of the diameter of the copper wire 22. This thickness ratio can ensure that the steel layer provides sufficient rigidity and strength for the static spring, without increasing the overall weight and cost of the static spring due to excessive thickness of the steel layer, and at the same time, it will not affect the conductivity of the copper wire 22.

[0041] The first steel layer 21 and the second steel layer 23 are designed with rounded surfaces 24 at both ends. The rounded surface 24 design can effectively avoid sharp corners at both ends of the steel layer. Sharp corners are prone to stress concentration, which may cause the steel layer to crack or be damaged at the sharp corners when the static spring is under force. The rounded surface 24 can make the stress more evenly distributed, improving the fatigue resistance and durability of the steel layer.

[0042] Preferably, a coating 25 is provided around the first steel layer 21 and the second steel layer 23. The coating 25 can be electroplated zinc or electroless nickel-phosphorus alloy (selected according to the application requirements). The coating 25 has a thickness of 8-15μm. The electroplated zinc coating has good anti-corrosion performance and can protect the steel layer from corrosion in harsh environments such as humidity and acidity.

[0043] Electroless nickel-phosphorus alloy coatings have higher hardness, wear resistance, and corrosion resistance, making them suitable for more demanding working environments.

[0044] The end frame 3 has four sides of equal length, forming a regular square structure, which facilitates standardized installation and positioning with other components. The length of one side of the end frame 3 is greater than the diameter of the stationary spring body 1. This design provides sufficient installation space and support area for the stationary spring body 1, ensuring that the stationary spring remains stable after installation. The end frame 3 has limiting edges 31 around the end facing the stationary spring body 1. The thickness of the limiting edges 31 is the same as the portion of the end frame 3 whose length is greater than the diameter of the stationary spring body 1. The limiting edges 31 can precisely limit the position of the stationary spring body 1 within the end frame 3, preventing lateral displacement or rotation of the stationary spring during use, and ensuring stable contact and reliable connection between the stationary spring and related components.

[0045] The pitch of the spiral coils is 0.2-0.5 times the diameter of the static spring body 1, and the uniformity deviation of the gap between adjacent spiral coils is ≤5%. The precise spiral pitch and highly uniform gap design enable the static spring to deform in a predetermined manner when subjected to force. When the static spring is subjected to external force, the stress can be evenly distributed among the spiral coils, avoiding damage to the static spring caused by excessive local stress.

[0046] Workflow: When using a high-precision stationary spring, select a suitable high-precision stationary spring according to the installation space and design requirements of the electronic equipment or precision instrument. Place the stationary spring in the predetermined installation position in the equipment. Use the regular shape of the four sides of the end face frame 3 and the limiting edge 31 for precise positioning. Securely fix the end face frame 3 to the equipment using bolts, welding, clips, or other fixing methods to ensure that the stationary spring will not shift during use. During the fixing process, care should be taken to avoid applying excessive external force to the stationary spring to prevent damage to the spiral structure of the stationary spring or poor contact between the copper wire 22 and the end face frame 3. Then, connect the stationary spring to the circuit of the electronic equipment to make it a current transmission channel. Since the copper wire 22 of the stationary spring forms a good surface contact with the end face frame 3, and the copper wire 22 is made of single-strand pure copper, it can ensure that the current is transmitted efficiently and stably in the stationary spring, meeting the current transmission requirements of the equipment. At the same time, the first steel layer 21 and the second steel layer 23 provide the necessary rigidity and strength for the stationary spring, enabling it to withstand the external forces such as vibration and impact generated during equipment operation, and maintain the shape and performance stability of the stationary spring.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision static spring comprising a static spring body (1), characterized in that: The static spring body (1) is formed by three layers of composite structure (2) spirally winding clockwise / counter-clockwise; The three layers of composite structure (2) are formed by the first steel layer (21), copper wire (22) and the second steel layer (23) through hot rolling composite process. The static spring body (1) is fixed with end face frame (3) at both ends by laser welding, and the end face frame (3) is made of copper alloy material.

2. The high-precision static spring according to claim 1, characterized in that: The first steel layer (21) and the second steel layer (23) completely wrap the copper wire (22) in a symmetrical cladding manner.

3. The high-precision static spring of claim 1, wherein: The copper wire (22) at both ends of the static spring body (1) is polished and forms a surface contact with the end face frame (3).

4. The high-precision static spring of claim 1, wherein: The copper wire (22) is single-strand pure copper material, and the thickness of the first steel layer (21) and the second steel layer (23) is 1 / 4-1 / 2 of the diameter of the copper wire (22).

5. The high-precision static spring of claim 1, wherein: The first steel layer (21) and the second steel layer (23) are designed with circular arc surface (24) at both ends.

6. The high-precision static spring of claim 1, wherein: The first steel layer (21) and the second steel layer (23) are provided with a coating (25) on the periphery, and the coating (25) can be selected from electroplated zinc or chemically plated nickel-phosphorus alloy, and the thickness of the coating (25) is 8-15 μm.

7. The high-precision static spring of claim 1, wherein: The end face frame (3) has four edges with the same length, the single edge length of the end face frame (3) is greater than the diameter of the static spring body (1), the end face frame (3) is provided with a limiting edge (31) around the end of the static spring body (1), and the thickness of the limiting edge (31) is the same as the part of the single edge length of the end face frame (3) which is greater than the diameter of the static spring body (1).

8. The high-precision static spring of claim 1, wherein: The spiral spacing of the spiral winding is 0.2-0.5 times the diameter of the static spring body (1), and the uniformity deviation of the gap between adjacent spiral turns is ≤5%.

Images