Steel belt hose clamp

Abstract

The application provides a steel belt type hose clamp, and belongs to the technical field of mechanical fixing accessories. The steel belt type hose clamp comprises: a ring-shaped main body surrounded by an elastic steel belt, first and second blocking ears are arranged at two ends of the ring-shaped main body respectively, the first and second blocking ears are used for cooperating with a clamp pliers to realize opening of the ring-shaped main body, and a hook-shaped protrusion is formed at the end of the second blocking ear, the hook-shaped protrusion is suitable for forming hook connection interlocking with the first blocking ear after the clamp pliers pre-applies a clamping force, so that the ring-shaped main body is kept in a maximum open state. The steel belt type hose clamp provided by the application realizes a releasable hook connection interlocking structure of the hook-shaped protrusion of the second blocking ear and the first blocking ear, realizes pre-opening and keeping of the clamp outside, is convenient for assembling in a narrow space, reduces cost, and improves sealing reliability and assembly efficiency.

Description

Technical Field

[0001] This application belongs to the technical field of mechanical fasteners, specifically relating to a steel strip hose clamp. Background Technology

[0002] In engine, automotive, and industrial piping systems, steel-strapped hose clamps are widely used for connecting and sealing hoses and fittings. Traditional steel-strapped clamps typically consist of a ring-shaped structure made of elastic steel strip with lugs at both ends for clamping. During assembly, clamping pliers are needed to tighten the clamp, pressing it against the hose's outer wall to achieve a seal. However, in confined spaces such as engine compartments, where surrounding components are densely packed and operating space is limited, using clamping pliers for on-site clamping is often difficult, posing significant challenges to assembly.

[0003] Existing technologies employ pre-opening clamp structures, such as clamps equipped with hand rings or spring clips, which can remain open before installation, eliminating the need for clamp pliers in confined spaces. However, such structures typically require additional parts like hand rings, increasing costs. Furthermore, the clamps are always in their maximum open state, resulting in significant roundness deviations that affect the fit with the hose and consequently reduce sealing reliability. Utility Model Content

[0004] To address at least one of the technical problems existing in the background art, this application provides a steel strip hose clamp. By setting a hook-shaped protrusion on the second stop ear to form a releasable hook-and-loop engagement structure with the first stop ear, the clamp can be pre-opened and maintained in a state on the outside, which is convenient for assembly in a narrow space, thereby reducing costs and improving sealing reliability and assembly efficiency.

[0005] The technical solution adopted in this application is as follows:

[0006] This application provides a steel strip type flexible hose clamp, including:

[0007] A ring-shaped body is formed by an elastic steel strip. A first lug and a second lug are respectively provided at both ends of the ring-shaped body. The first lug and the second lug are used to cooperate with clamps to open the ring-shaped body.

[0008] The end of the second stop has a hook-shaped protrusion, which is adapted to engage with the first stop after the clamping force is applied in advance by the clamping pliers, so that the annular body is kept in the maximum open state.

[0009] According to the steel strip hose clamp provided in this application embodiment, the annular body is formed by a steel strip with excellent elasticity, which has a tendency to contract in its natural state, and can apply continuous clamping force to the hose to achieve a reliable seal. The first and second lugs at both ends of the annular body serve as operating parts that cooperate with the clamp pliers. The clamp can be opened by external force, meeting the needs of conventional assembly processes. The end of the second lug has a hook-shaped protrusion. When the clamp pliers apply clamping force in advance, this structure can form a stable hook-lock engagement with the first lug, locking the clamp in the maximum open state. This allows the opening operation to be completed in a space with sufficient space in advance, and the clamp in the open state can be transferred to a narrow or difficult-to-operate assembly position and fitted onto the hose. Then, by using a simple tool (such as a flathead screwdriver) to pry the hook-shaped protrusion to disengage it from the first lug, the elastic potential energy can be released, achieving automatic tightening and sealing. No additional auxiliary parts such as wristbands are needed, which reduces manufacturing costs and avoids the problems of large roundness deviation and poor sealing caused by long-term opening of traditional pre-opening clamps. At the same time, it significantly improves the assembly efficiency and feasibility in complex spaces such as engine compartments. It has a simple structure, is easy to operate, has reliable sealing and low cost.

[0010] Furthermore, the steel strip hose clamp provided in this application retains the original conventional clamp assembly method. Under conditions with sufficient operating space, clamp pliers can be used to directly clamp the first and second lugs, opening the annular body. Then, the hose is inserted, contracted, and tightened, eliminating the need for pre-opening and locking operations, thus ensuring compatibility with traditional assembly processes. This not only avoids adding extra assembly complexity but also enhances the clamp's applicability and flexibility, enabling it to be used in space-constrained special occasions as well as for efficient assembly in normal environments. It balances versatility and specialization, further strengthening the product's market adaptability and application range.

[0011] According to one embodiment of this application, the hook-shaped protrusion is a metal protrusion formed by stamping and bending the end of the second stop ear, and an arc transition surface is formed at the connection between the metal protrusion and the second stop ear.

[0012] According to one embodiment of this application, a stepped surface is formed on the first stop ear for engaging with the hook-shaped protrusion. When the hook-shaped protrusion engages with the first stop ear, the hook-shaped protrusion abuts against the stepped surface.

[0013] According to one embodiment of this application, the first and second earpieces extend along the annular body, and at least some areas of the first and second earpieces are aligned.

[0014] According to one embodiment of this application, the first and second lugs are located on the same side of the annular body, and the hook-shaped protrusion is bent away from the center of the annular body.

[0015] According to one embodiment of this application, at least one of the two mating ends of the hook-shaped protrusion and the stepped surface has a protrusion structure or a micro-tooth structure formed thereon.

[0016] According to one embodiment of this application, when a protrusion structure is formed on the mating end, the protrusion structure is partially interference-fitted in the interlocking state;

[0017] When a micro-tooth structure is formed on the mating end, the micro-tooth structure is locally interference-fitted in the interlocking state.

[0018] According to one embodiment of this application, the first lug is formed with stamped grooves, which are used to indicate the correct locking position of the hook-shaped protrusion.

[0019] According to one embodiment of this application, the inner surface of the annular body is provided with anti-slip serrations to increase the friction between the steel strip hose clamp and the outer wall of the hose.

[0020] According to one embodiment of this application, stress relief grooves are formed on the annular body in the regions near the first and second lugs. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the steel strip hose clamp provided in the embodiment of this application.

[0023] in,

[0024] 11. Ring-shaped main body; 12. First stop ear; 13. Second stop ear; 131. Hook-shaped protrusion; 14. Stress relief groove. Detailed Implementation

[0025] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0027] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0030] like Figure 1 As shown, this application embodiment provides a steel strip type hose clamp, including:

[0031] The annular body 11 is formed by an elastic steel strip. The two ends of the annular body 11 are respectively provided with a first stop ear 12 and a second stop ear 13. The first stop ear 12 and the second stop ear 13 are used to cooperate with the clamp pliers to open the annular body 11.

[0032] The end of the second stop ear 13 has a hook-shaped protrusion 131. The hook-shaped protrusion 131 is adapted to engage with the first stop ear 12 after the clamping force is applied in advance by the clamping caliper, so that the annular body 11 is kept in the maximum open state.

[0033] Specifically, the annular body 11 is formed by an elastic steel strip, typically made of cold-rolled spring steel (such as 65Mn or SUP9A) through stamping and heat treatment processes, exhibiting excellent elastic recovery performance and fatigue strength. The annular body 11 tends to contract in its natural state, and after assembly, it continuously applies a uniform radial clamping force to the outer wall of the hose, thereby achieving reliable sealing and anti-loosening functions. Its elastic deformation capacity also allows the clamp to adaptively adjust to the expansion and contraction of the hose's outer diameter due to temperature changes, maintaining long-term sealing stability.

[0034] A first lug 12 and a second lug 13 are respectively provided at both ends of the annular body 11. These two lugs serve as the force-bearing connection points of the clamping pliers, used to transmit clamping force. When the clamping pliers clamp the first lug 12 and the second lug 13, they can overcome the elasticity of the steel strip, allowing the annular body 11 to open, facilitating the insertion of hoses or pipe fittings. This structure adopts a mature design, is compatible with existing clamping pliers tools, requires no additional specialized equipment development, and helps reduce usage costs and improve versatility.

[0035] Specifically, the end of the second stop ear 13 is provided with a hook-shaped protrusion 131, which is a hook-shaped structure extending in a specific direction. Before assembly, in a position with sufficient operating space, clamping force can be applied to the first stop ear 12 and the second stop ear 13 using clamping pliers, so that the annular body 11 reaches its maximum open state. At this time, the hook-shaped protrusion 131 deforms accordingly and forms a mechanical hook-lock with the first stop ear 12, stably locking the clamp in the open position. This allows the clamp to be pre-loaded into an open state at a position far from the assembly point, and maintain this state when transferred to a narrow or blind spot installation position. Then, by using a simple tool (such as a flathead screwdriver) to pry the hook-shaped protrusion 131, it can be disengaged from the first stop ear 12, releasing elastic potential energy and automatically retracting to complete the fastening.

[0036] According to the steel strip hose clamp provided in this application embodiment, the annular body 11 is formed by a steel strip with excellent elasticity, which has a tendency to contract in its natural state and can apply continuous clamping force to the hose to achieve a reliable seal. The first lug 12 and the second lug 13 provided at both ends of the annular body 11 serve as operating parts that cooperate with the clamp pliers. The clamp can be opened by external force, which meets the needs of conventional assembly processes. The end of the second lug 13 is provided with a hook-shaped protrusion 131. When the clamp pliers apply clamping force in advance, this structure can form a stable hook-locking engagement with the first lug 12, so that the clamp is locked in the maximum open state. Thus, the opening operation can be completed in advance in a space with sufficient space, and the clamp in the open state can be transferred to a narrow or difficult-to-operate assembly position and put into the hose. Then, by using a simple tool (such as a flathead screwdriver) to pry the hook-shaped protrusion 131 to disengage it from the first lug 12, the elastic potential energy can be released to achieve automatic tightening and sealing. No additional auxiliary parts such as wristbands are needed, which reduces manufacturing costs and avoids the problems of large roundness deviation and poor sealing caused by long-term opening of traditional pre-opening clamps. At the same time, it significantly improves the assembly efficiency and feasibility in complex spaces such as engine compartments. It has a simple structure, is easy to operate, has reliable sealing and low cost.

[0037] Furthermore, the steel strip hose clamp provided in this embodiment retains the original conventional clamp assembly method. Under conditions with sufficient operating space, clamp pliers can be used to directly clamp the first stop ear 12 and the second stop ear 13, causing the annular body 11 to open. Then, the hose is inserted, contracted, and tightened, eliminating the need for pre-opening and locking operations, thus ensuring compatibility with traditional assembly processes. This not only avoids adding extra assembly complexity but also enhances the clamp's applicability and flexibility, enabling it to be used in space-constrained special occasions as well as for efficient assembly in normal environments. It balances versatility and specialization, further enhancing the product's market adaptability and application range.

[0038] like Figure 1 As shown, in some embodiments of this application, the hook-shaped protrusion 131 is a metal protrusion formed by stamping and bending the end of the second lug 13, and an arc transition surface is formed at the connection between the metal protrusion and the second lug 13.

[0039] The hook-shaped protrusion 131 is a metal protrusion formed by stamping and bending the end of the second lug 13. This forming method not only simplifies the manufacturing process but also ensures the integrity and robustness of the structure. Specifically, during the manufacturing process, pressure is applied to the end of the second lug 13 by precisely controlling the stamping die, causing it to bend into a predetermined shape to form the hook-shaped protrusion 131, ensuring that it has sufficient strength and rigidity to withstand the mechanical stress during assembly.

[0040] Specifically, a rounded transition surface is designed at the connection between the metal protrusion and the second stop 13. The rounded transition surface effectively disperses local stress concentration and reduces the risk of material fatigue or fracture that may occur during repeated opening and closing. Compared with right angles or sharp transitions, the rounded transition can make the force distribution more uniform, thereby extending the overall service life of the clamp and improving its reliability under extreme working conditions.

[0041] Furthermore, the rounded transition surface also helps improve the performance of the hook-shaped protrusion 131 in actual operation. For example, when the hook-shaped protrusion 131 engages with the first stop ear 12, the smooth transition reduces frictional resistance, making it easier for both to align accurately and complete the locking action. At the same time, when unlocking is required, it also facilitates the insertion of tools and the application of prying force, avoiding the risk of tools slipping or damaging the hose surface due to sharp edges. Therefore, this design not only enhances the durability of the product but also optimizes the user experience during assembly.

[0042] In some embodiments of this application, a stepped surface is formed on the first lug 12 for engaging with the hook protrusion 131. When the hook protrusion 131 engages with the first lug 12, the hook protrusion 131 abuts against the stepped surface.

[0043] The first stop ear 12 has a stepped surface that mates with the hook-shaped protrusion 131. This stepped surface serves as a key locking and bearing structure, forming a stable and reliable mechanical hook-and-lock engagement with the hook-shaped protrusion 131 when the clamp is pre-opened. When the clamping caliper applies clamping force to the first stop ear 12 and the second stop ear 13, causing the annular body 11 to expand to its maximum open state, the hook-shaped protrusion 131 on the second stop ear 13 engages and abuts against the stepped surface for limiting. At this time, the stepped surface provides a clear axial and radial support surface for the hook-shaped protrusion 131, effectively preventing the clamp from shrinking due to elastic recovery without external force intervention, thereby ensuring that the clamp can be stably maintained in the pre-opened state, facilitating subsequent transfer and installation.

[0044] The stepped surface has excellent mechanical load-bearing capacity, capable of withstanding the compressive and shear forces from the hook-shaped protrusions 131 during the locking process, preventing locking failure. Simultaneously, the geometry of the stepped surface (such as a flat surface, a sloped surface, or a chamfered transition surface) can be optimized according to actual assembly requirements to achieve smooth locking action and a secure locking effect.

[0045] By setting a stepped surface on the first stop ear 12 and cooperating with the hook-shaped protrusion 131, the clamp not only achieves the repeated pre-opening and reliable locking functions, improving the ease of assembly in confined spaces, but also ensures the stability of the locked state and the controllability of the unlocking operation. It has multiple advantages such as simple structure, safety and reliability, and low cost, significantly enhancing the applicability of steel strip hose clamps in complex working conditions and the user experience.

[0046] like Figure 1 As shown, in some embodiments of this application, the first ear block 12 and the second ear block 13 extend along the annular body 11, and the first ear block 12 and the second ear block 13 are at least partially aligned.

[0047] The first stop ear 12 and the second stop ear 13 are arranged along the extension direction of the annular body 11, that is, they are roughly located in the tangential direction of the annular body 11, and in the installed or clamped state, at least some areas are spatially aligned with each other. This arrangement allows the first stop ear 12 and the second stop ear 13 to form a good force correspondence, which facilitates the jaws of the clamping pliers to clamp the two stop ears simultaneously and symmetrically, ensuring that the clamping force is evenly transmitted to both ends of the annular body 11, and avoiding deformation of the steel strip, stress concentration or clamping failure due to uneven loading or twisting.

[0048] Furthermore, the aligned structure of the ear-blocking area helps improve the operational stability of the clamp during use. When the clamping pliers apply clamping force, the aligned area can serve as the direct force application surface, reducing the risk of slippage and misalignment, allowing the clamp to open smoothly to the required diameter. At the same time, this alignment design also optimizes the identifiability and operability of the clamp in automated assembly or manual operation, improving assembly efficiency and consistency.

[0049] Furthermore, this structure maintains a similar external profile to traditional steel band clamps without compromising functionality, requiring no significant modifications to molds or assembly tools, thus exhibiting excellent process continuity and versatility. By extending the first stop 12 and the second stop 13 along the annular body 11 and aligning at least a portion of their areas, not only is the mechanical rationality and operational reliability during clamping enhanced, but a structural guarantee is also provided for the stable locking between the hook-shaped protrusion 131 and the first stop 12, further improving the clamp's applicability and overall performance in complex assembly environments.

[0050] like Figure 1 As shown, in some embodiments of this application, the first ear 12 and the second ear 13 are located on the same side of the annular body 11, and the hook-shaped protrusion 131 is bent away from the center of the annular body 11.

[0051] The first stop 12 and the second stop 13 are located on the same side of the annular body 11, meaning that both stops extend from the end of the annular body 11 in the same direction (e.g., both outward or both upward). This allows the clamping pliers to simultaneously apply force to both stops using a conventional clamping method. The clamping process is stable and reliable, avoiding tool interference or insecure clamping caused by misalignment or reverse arrangement of the stops, significantly improving the convenience of operation and assembly efficiency.

[0052] Furthermore, the hook-shaped protrusion 131 bends away from the center of the annular body 11, that is, its bending direction is towards the outer periphery of the annular body 11, away from the center of the clamp's inner cavity. This outwardly bent structural design has multiple advantages: First, when it forms a hook lock with the first stop ear 12, the hook-shaped protrusion 131 protrudes outward, making it easy for operators or automated tools to identify its position from the outside. When it is necessary to release the locked state, tools such as flathead screwdrivers can be easily inserted between the hook-shaped protrusion 131 and the first stop ear 12 to apply prying force, achieving quick unlocking. Second, this outward-facing structure avoids the formation of protrusions or obstacles on the inner wall of the clamp, ensuring that the inner surface of the annular body 11 is intact and smooth, effectively preventing scratches on the outer wall of the hose during assembly, and ensuring sealing quality and hose service life. Finally, when the outwardly bent hook-shaped protrusion 131 is deformed under force during the locking process, its movement trajectory is in the outer space of the clamp, without occupying internal installation space, which is conducive to achieving interference-free assembly in a compact layout.

[0053] By setting the first stop ear 12 and the second stop ear 13 on the same side of the annular body 11 and bending the hook-shaped protrusion 131 away from the center, not only is the operability of clamping and locking optimized, but also the safety and assembly compatibility are improved. This allows the clamp to maintain high strength while having good human-machine interaction, process adaptability and reliability. It is especially suitable for complex pipeline connection scenarios with limited space and high requirements for sealing and ease of operation.

[0054] In some embodiments of this application, at least one of the two mating ends of the hook-shaped protrusion 131 and the stepped surface has a protrusion structure or a micro-tooth structure formed thereon.

[0055] When the hook-shaped protrusion 131 and the stepped surface form a hook-lock engagement, at least one of the two mating ends is provided with a protrusion structure or a micro-tooth structure. When the clamp is clamped to its maximum open state by the clamping pliers and the hook-shaped protrusion 131 and the stepped surface of the first stop ear 12 are locked together, the protrusion or micro-tooth structure will then make local contact or interference fit, introducing a controllable micro-interference or mechanical interlocking effect at the locking interface.

[0056] This significantly enhances the stability and vibration resistance of the interlocking mechanism. In practical applications, clamps may experience minor collisions and vibrations during transportation, handling, or installation. If the locking interface is too smooth, accidental slippage can easily occur, causing the clamp to spring back prematurely and affecting assembly safety. However, by setting a protruding or micro-tooth structure, the static friction between the locking surfaces can be effectively increased or a micro-scale mechanical interlock can be formed without affecting normal unlocking operations. This prevents unexpected disengagement caused by minor external forces or vibrations, ensuring that the clamp is reliably held in the pre-opened state until a manual unlocking action is applied.

[0057] The protrusion structure can be a hemispherical or conical micro-protrusion formed by stamping, distributed on the end face or step contact area of ​​the hook-shaped protrusion 131; the micro-tooth structure can be an array of tiny serrations or oblique knurling, which has a directional guiding function, smoothly cutting in during locking and generating resistance when subjected to reverse force. These structures can all be integrally stamped by mold, requiring no subsequent processing, resulting in low cost and high consistency.

[0058] In some embodiments of this application, when a protrusion structure is formed on the mating end, the protrusion structure is locally interference-fitted in the interlocking state.

[0059] When a micro-tooth structure is formed on the mating end, the micro-tooth structure is locally interference-fitted in the interlocking state.

[0060] When a protrusion structure is formed on the mating end, during the locking process between the hook-shaped protrusion 131 and the stepped surface of the first stop ear 12, the protrusion is located between the contact interfaces and undergoes slight elastic or elastoplastic deformation, forming a local interference fit. This local interference is not overall interference, but a controllable clamping concentrated in the protrusion area. It provides sufficient locking force to prevent loosening due to vibration or slight external force, without significantly increasing the prying force required for normal unlocking, ensuring that operators or automated tools can still easily achieve reliable release using simple tools such as flathead screwdrivers.

[0061] Similarly, when the mating ends are equipped with micro-tooth structures, the micro-tooths are typically distributed in a fine, sawtooth or corrugated array on the end face or stepped surface of the hook-shaped protrusion 131. During the locking process, the micro-tooths on both sides interlock, and local line contact or point contact occurs between the tooth surfaces, forming a multi-point micro-interference fit. This structure not only increases the frictional resistance of the contact interface, but also further suppresses relative slippage through the mechanical meshing between the micro-tooths, significantly improving the vibration resistance and self-locking capability of the locking structure. At the same time, the tilt angle of the micro-tooths can be designed to be "small ingress angle and large disengagement angle," making the locking process smooth, while the reverse disengagement requires overcoming greater resistance, thus achieving a unidirectional self-locking function.

[0062] Both the aforementioned protrusion structure and micro-tooth structure can be integrally manufactured during the lug forming process using precision stamping dies, without the need for additional processes or parts. This offers advantages such as low cost, high precision, and good repeatability. More importantly, the partial interference fit design concept achieves a good balance between "locking reliability" and "unlocking convenience," avoiding the assembly difficulties or unlocking failure risks associated with full-circumference interference fits.

[0063] Whether it is a convex structure or a micro-tooth structure, the local interference fit achieved in the interlocking state effectively enhances the stability of the clamp in the pre-opening state, prevents accidental release, and improves the safety and reliability of the product throughout the transportation, assembly and use process.

[0064] In some embodiments of this application, a stamped groove is formed on the first lug 12, the groove being used to indicate the correct locking position of the hook protrusion 131.

[0065] The first stop ear 12 has markings formed by a stamping process. These markings serve as positioning markers for both visual and tactile identification, clearly indicating the correct position that the hook-shaped protrusion 131 should reach during the locking process. When the clamping pliers apply clamping force to the first stop ear 12 and the second stop ear 13, causing the hook-shaped protrusion 131 to move towards the first stop ear 12 and prepare to form a hook-and-lock engagement, the operator can judge whether the locking is in place by observing or feeling the relative positional relationship between the markings and the hook-shaped protrusion 131.

[0066] Specifically, the notch is typically located on the first lug 12 in the area corresponding to the final locking point of the hook-shaped protrusion 131. Its shape can be easily identifiable, such as a straight groove, a ring mark, a crosshair, or a letter symbol. When the end or edge of the hook-shaped protrusion 131 aligns with or coincides with the notch, it indicates that the clamp is fully open and the locking structure is in optimal engagement. At this point, the annular body 11 reaches its maximum opening diameter, allowing it to smoothly fit into the assembly position of the hose and pipe fitting. If the notch is not aligned, it indicates incomplete locking or a deviation, requiring re-operation to avoid accidental rebound of the clamp during transfer or installation due to incomplete locking, which could lead to assembly failure or safety hazards.

[0067] This scoring structure is integrally stamped with the lug, requiring no additional processing steps. It is low-cost, highly consistent, and the markings are permanent, resistant to wear and tear. Furthermore, it provides a reliable basis for judgment in both manual assembly and automated inspection, and is particularly suitable for assembly environments with insufficient light or limited visibility, significantly improving operational accuracy and efficiency.

[0068] By setting stamped engravings on the first stop ear 12 as a locking position indicator, not only is the locking state visualized and perceptible, but it also effectively prevents misoperation and assembly defects, and improves the safety, reliability and human-machine interaction of the clamp.

[0069] In some embodiments of this application, the inner surface of the annular body 11 is provided with anti-slip serrations to increase the friction between the steel strip hose clamp and the outer wall of the hose.

[0070] The inner surface of the annular body 11 is provided with anti-slip serrations. These serrations are evenly distributed along the inner surface of the steel strip and can take the form of continuous annular ridges, interlaced sawtooth-shaped protrusions, or spiral patterns. Their main function is to significantly increase the contact friction between the clamp and the outer wall of the hose, preventing the clamp from slipping circumferentially or moving axially after installation due to vibration, pressure fluctuations, or thermal expansion and contraction, thereby improving the stability of the connection and the reliability of the seal.

[0071] When the clamp retracts and tightens onto the outside of the hose under the action of the clamping pliers, the anti-slip teeth will slightly embed into the outer surface material of the hose under pressure (especially suitable for rubber or elastic hoses), forming a micro-mechanical interlocking effect. This not only effectively transmits radial clamping force but also resists external torque and dynamic loads. This structure is particularly suitable for high-vibration, high-temperature, and variable-condition environments such as engine cooling systems, fuel lines, and intake systems. It can maintain the clamp position for a long time, avoiding safety hazards such as leakage, wear, or even hose detachment caused by loosening.

[0072] Furthermore, the anti-slip serrations are integrally stamped with the annular body 11, a mature manufacturing process that requires no subsequent processing, resulting in low cost and high consistency. The tooth shape, pitch, and height can be optimized according to different hose materials and wall thicknesses, ensuring anti-slip performance while avoiding excessive pressure damage or stress concentration on the hose. In some embodiments, the serrated area can also be rounded or blunted to balance the clamping force and hose protection.

[0073] By setting anti-slip serrations on the inner surface of the annular body 11, the friction locking ability between the clamp and the hose is significantly enhanced, the vibration resistance and long-term reliability of the connection are improved, and the sealing performance and system safety are further guaranteed. This is an important structural feature of this application in terms of functional integration and practical performance optimization.

[0074] like Figure 1 As shown, in some embodiments of this application, stress relief grooves 14 are formed on the annular body 11 in the regions near the first lug 12 and the second lug 13.

[0075] Stress relief grooves 14 are formed on the annular body 11 near the first stop ear 12 and the second stop ear 13. These stress relief grooves 14 are localized grooves or thinning structures opened along the width or circumference of the steel strip, typically located in the root transition area where the stop ear connects to the annular body 11. Since the first stop ear 12 and the second stop ear 13 are the stress-bearing parts where the clamp and clamping clamp directly interact, stress concentration easily occurs in this connection area during clamping or pre-opening. Long-term use may lead to material fatigue, crack initiation, or even fracture. The stress relief grooves 14 effectively reduce local stiffness, guide stress redistribution, and prevent excessive stress accumulation at the root, thereby significantly improving the structural durability and fatigue life of the clamp under repeated assembly / disassembly or dynamic loads.

[0076] Furthermore, the design of the stress relief groove 14 can optimize the elastic deformation behavior of the annular body 11. During the clamp opening process, the two ends of the steel strip need to undergo a large curvature change. As a "flexible hinge" area, the stress relief groove 14 can promote the uniform diffusion of deformation to both sides, reduce the risk of plastic deformation, and ensure that the clamp can accurately spring back to the expected diameter after release, maintaining good sealing fit. Especially when achieving the maximum opening state and locking with the hook-shaped protrusion 131, this structure helps to alleviate the residual stress caused by large deformation and ensure locking stability.

[0077] The stress relief groove 14 can be integrally processed during the forming process using a stamping die, requiring no additional steps. It is precisely positioned and dimensionally consistent, demonstrating excellent process feasibility and economy. Its shape can be U-shaped, V-shaped, or arc-shaped, with the depth and length optimized based on material thickness and mechanical properties, achieving stress reduction without compromising overall structural strength.

[0078] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0079] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0080] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A steel belted hose clamp characterized by, include: The annular body (11) is formed by elastic steel strips. The two ends of the annular body (11) are respectively provided with a first stop (12) and a second stop (13). The first stop (12) and the second stop (13) are used to cooperate with clamps to open the annular body (11). The end of the second stop (13) is formed with a hook-shaped protrusion (131), which is adapted to engage with the first stop (12) after the clamping force is applied in advance by the clamping pliers, so that the annular body (11) is kept in the maximum open state.

2. The steel belted hose clamp of claim 1, wherein, The hook-shaped protrusion (131) is a metal protrusion formed by stamping and bending the end of the second lug (13), and an arc transition surface is formed at the connection between the metal protrusion and the second lug (13).

3. The steel belted hose clamp of claim 1, wherein, The first lug (12) has a stepped surface for engaging with the hook-shaped protrusion (131). When the hook-shaped protrusion (131) engages with the first lug (12), the hook-shaped protrusion (131) abuts against the stepped surface.

4. The steel belted hose clamp of claim 1, wherein, The first ear (12) and the second ear (13) extend along the annular body (11), and the first ear (12) and the second ear (13) are at least partially aligned.

5. The steel belted hose clamp of claim 1, wherein, The first lug (12) and the second lug (13) are located on the same side of the annular body (11), and the hook-shaped protrusion (131) is bent away from the center of the annular body (11).

6. The steel strip hose clamp according to claim 3, characterized in that, At least one of the two mating ends of the hook-shaped protrusion (131) and the stepped surface has a protrusion structure or a micro-tooth structure formed on it.

7. The steel belted hose clamp of claim 6, wherein, When a protrusion structure is formed on the mating end, the protrusion structure is locally interference-fitted in the interlocking state. When a micro-tooth structure is formed on the mating end, the micro-tooth structure is locally interference-fitted in the interlocking state.

8. The steel belted hose clamp of claim 1, wherein, The first lug (12) has stamped grooves that indicate the correct locking position of the hook protrusion (131).

9. The steel belted hose clamp according to any one of claims 1 to 8, characterized in that, The inner surface of the annular body (11) is provided with anti-slip serrations to increase the friction between the steel strip hose clamp and the outer wall of the hose.

10. The steel strip hose clamp according to any one of claims 1 to 8, characterized in that, Stress relief grooves (14) are formed in the areas of the annular body (11) near the first lug (12) and the second lug (13).

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