Automobile pipe clamp device easy to install

Abstract

The invention relates to the field of automobile pipe clamps, in particular to an automobile pipe clamp device easy to install. The device is composed of an outer ring support and an inner ring chain ring which are coaxial, and a clamping module is arranged in the circumferential direction of an inner ring; the module comprises a mounting base, a swing arm rotating through a pivot, a pipeline contact head with radial linear freedom degree and a coaxial pre-pressing reset spring arranged in the linear direction of the pipeline contact head. The induction execution unit comprises a micromotor deceleration lead screw push rod and a displacement sensor, and the push rod is rigidly connected with a contact head and performs closed-loop adjustment under feedback. The induction execution unit is arranged on the side back to the ring center, and the outer ring and the inner ring are in floating connection. According to the structure, multi-point uniform clamping and quick return are achieved, the installation tolerance and the vibration working condition are considered, the clamping force can be finely adjusted, slippage and indentation are reduced, and the reliability is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive pipe clamps, specifically an easy-to-install automotive pipe clamp device. Background Technology

[0002] Liquid or gas pipelines on vehicle platforms are simultaneously subjected to the combined effects of vibration, impact, temperature differences, and installation errors during operation. Common belt clamps, spring clamps, and simplified swing arm clamping structures generally rely on fixed pre-tensioning or manual adjustment to obtain initial clamping force, lacking the ability to adapt to assembly tolerances, roundness errors, and thermal expansion and contraction. Under conditions of strong bumps or long-term vibration, the clamping force is either insufficient, leading to slight slippage and attitude drift at the contact surface, or excessive, forming high-pressure marks in local areas, inducing coating damage, fatigue cracks, or seal degradation. These structures often rely on curved surface clamping, with a large lateral force component mixed into the contact path, resulting in rapid wear of guides and contact parts, a decline in repeatability accuracy over time, and high maintenance frequency.

[0003] Existing solutions primarily rely on threaded tightening or self-clamping. During assembly, efficiency depends on manual experience, resulting in poor pre-tightening consistency. During operation, random vibrations and temperature variations cause clamping forces that are untraceable and unadjustable, leading to frequent "loose-tight" fluctuations. Furthermore, many clamp-like structures only provide compression without clear linear guidance. The coupling of degrees of freedom onto the same component causes lateral sliding and biasing of the contact head as it approaches the pipe wall, making local contact pressure difficult to control. This increases wear and amplifies the risk of micro-slippage.

[0004] While some existing devices employ a swing-arm clamping mechanism, which can create a certain installation opening, the swing arm return is often handled by the same elastic element. The reset references for angular and linear positions are not separated, leading to significant zero-position drift during reinstallation. Furthermore, there is a risk of interference between the actuator's installation position and clamping path; collisions or dust accumulation in confined spaces can easily cause sensor and transmission failures. More importantly, many structures use soft connections between the drive and contact ends or transmit force through linkages with large gaps, making it difficult to suppress reverse free travel and elastic rebound. This results in insufficient control precision during minute displacement phases, making it difficult to achieve a stable holding position and uniform circumferential force.

[0005] For applications with limited vehicle space and complex operating conditions, existing clamping systems lack a coordinated design for both "uniform force distribution at multiple points in the circumferential direction" and "micro-radial compliance." Rigidly fixed single-ring or single-point clamping has limited ability to absorb assembly errors and operational displacements, and over-constraint can easily concentrate stress at a few contact points. While a fully flexible integral spring clamp is convenient to assemble, its inability to precisely define the contact stroke and holding position results in insufficient long-term stability and maintainability. In addition, considering the strong bumps that vehicles experience under specific road conditions, some existing technologies attempt to increase power by setting a fixed upper limit or a simple threshold, but this can easily lead to a dilemma: insufficient power under strong conditions and overly conservative power under weak conditions. Summary of the Invention

[0006] The purpose of this invention is to provide an easy-to-install automotive pipe clamp device to solve the technical problems mentioned in the background art.

[0007] Based on the above ideas, the present invention provides the following technical solution: An easy-to-install automotive pipe clamp device includes: an outer ring support; an inner ring chain coaxially arranged with the outer ring support; multiple clamping modules circumferentially distributed, each clamping module fixed to the inner ring chain and arranged towards the center of the ring, each clamping module including a mounting base fixed to the inner ring chain, a swing arm rotatably connected to the mounting base via a pivot, a pipe contact head disposed at the front end of the swing arm, and a return spring arranged along the linear motion direction of the pipe contact head; the pipe contact head has a linear motion degree of freedom in the radial direction relative to the swing arm; it also includes a sensing and actuation unit disposed on the clamping module, the sensing and actuation unit including a drive element and a sensor, wherein the drive element uses a micro motor to drive a lead screw through a reduction gear to form a linear output push rod, and a nut is rigidly connected to the pipe contact head, so that the push rod of the drive element performs displacement adjustment of the pipe contact head along the linear motion direction; the sensor is used to detect the displacement and stroke end position of the push rod and output a position signal; a torsion spring is disposed at the root of the swing arm to return the swing arm to its original position.

[0008] A ring support is formed by the outer ring support and the inner ring chain, which works in conjunction with the circumferentially arranged clamping modules. With the swing arm providing rotational guidance and the pipe contact head providing radial linear motion, a return spring provides preload along the linear direction. The drive component is rigidly connected to the contact head via a lead screw and push rod. Sensors provide displacement and end-position feedback, and a torsion spring at the root of the swing arm handles angular return. This establishes a clamping link with clear division of labor between angular and linear positions, simplifying installation and debugging, ensuring a smoother clamping process, higher repeatability, more uniform contact pressure distribution, and improved overall machine reliability.

[0009] Preferably, the return spring is a coaxial compression spring with pre-compression to provide continuous pre-tension to the pipe contact head and to return the pipe contact head to its original position along the linear movement direction upon release.

[0010] The return spring adopts a coaxial compression and pre-compression setting and is arranged in a straight line. It can maintain continuous pre-tension in the state of no power or power failure, reduce the hysteresis caused by guide friction, and shorten the positioning time. When unloading, it returns to its original position in the coaxial direction, reducing the risk of jamming and improving passive safety and long-term stability.

[0011] Preferably, the sensor provides the detected displacement and end position signals to the sensing and actuation unit, which then performs closed-loop control on the displacement and stop position of the drive component to increase the clamping force of the pipe contact head and limit the holding position after contact determination.

[0012] The sensor outputs displacement and end position signals, which the sensing and actuation unit uses to implement closed-loop control of the drive components. This can limit overshoot after contact detection and avoid hard collisions. At the same time, it performs small-step convergence and precise stop position control on the clamping stroke to compensate for deviations caused by thermal drift and wear, ensuring consistency and repeatability in long-term use.

[0013] Preferably, the lead screw of the driving component is arranged coaxially with the linear motion direction of the pipe contact head, and the nut is connected to the pipe contact head through a rigid contact or an integral structure to reduce transmission backlash and improve displacement resolution.

[0014] By arranging the lead screw output and the linear motion direction of the pipe contact head coaxially, and connecting the nut and the contact head with a rigid contact or an integrated structure, the eccentric torque and lateral load can be significantly reduced, and the wear of the guide components can be reduced. At the same time, the transmission clearance and reverse idle stroke are reduced, the displacement resolution and linearity of force transmission are improved, the low-speed micro-feed is smoother, and the clamping stability is better.

[0015] Preferably, the reset spring provides a basic clamping force to the pipe contact head, and the drive component performs displacement compensation and clamping force gain on the pipe contact head based on the detection of the sensor.

[0016] The return spring provides the basic clamping force, and the drive component performs displacement compensation and clamping force gain based on the detection results, forming a two-stage clamping strategy of first positioning and then applying force. This strategy can adapt to pipes with different outer diameters and hardnesses, and can maintain a stable state after achieving the target clamping, reducing the risk of local indentation and wear between the contact head and the clamped part.

[0017] Preferably, the sensing and actuating unit is disposed on the side of the mounting base facing away from the center of the ring.

[0018] By placing the sensing actuator on the side of the mounting base facing away from the center of the ring, the straight clamping path of the pipe contact head can be avoided, reducing the probability of mechanism interference and accidental collisions. At the same time, it facilitates wiring and protection, reduces the impact of oil and dust on the detection and transmission mechanism, and improves maintenance convenience and environmental adaptability.

[0019] Preferably, the inner ring chain forms a small displacement degree of freedom relative to the outer ring support through a floating connection structure, which is used to provide compliance when the clamped pipe is displaced, and together with the circumferentially distributed clamping modules, achieves radial multi-point constraint and self-centering clamping.

[0020] The floating connection between the inner ring chain and the outer ring support provides a small degree of displacement freedom, which can accommodate the positional deviation caused by assembly tolerances, thermal expansion and contraction, and vibration and impact, and avoid stress concentration and overload caused by over-constraint; together with the circumferentially distributed clamping modules, radial multi-point constraint and self-centering clamping are realized, which improves the overall durability and vibration resistance of the machine and provides a wider installation tolerance.

[0021] The technical solution of the present invention may include the following beneficial effects: The contact head is guided radially in a linear fashion, and a coaxial preloaded return spring provides back pressure, ensuring a stable basic clamping force and a clear travel reference during the contact process. The drive unit utilizes a micro-motor paired with a lead screw, with the nut rigidly connected to the contact head, significantly suppressing idle travel and elastic rebound in the transmission chain. Sensors output displacement and end-position signals, and the sensing actuator implements closed-loop regulation, enabling it to approach the target holding position in small steps after contact detection, avoiding overshoot and hard collisions. The synergy of this linear guidance, rigid force transmission, and closed-loop control results in a more stable clamping force output, better repeatability, and more uniform contact pressure distribution, effectively reducing the risk of localized indentation and slippage, and meeting the accuracy and consistency requirements under long-term continuous operation.

[0022] The circumferentially arranged clamping modules form a ring-shaped contact zone, enabling automatic centering and uniform force distribution on the pipe fittings under multi-point support. The floating connection between the inner ring chain and the outer ring support provides the system with a small degree of displacement freedom, absorbing relative displacement caused by assembly tolerances, thermal expansion and contraction, and operational vibrations, thus avoiding stress concentration caused by rigid over-constraint. The torsion spring at the root of the swing arm is responsible for angular return, while the linear stroke ensures radial positioning. The two return paths work together to allow the device to quickly reset and re-clamp even under changes in the outer diameter of the pipe fitting, positional deviations, or load disturbances. This improves installation tolerance and field adaptability, shortens commissioning time, and reduces reliance on installation accuracy and operational stability.

[0023] The sensing actuator is positioned on the side of the mounting base facing away from the ring center, avoiding the linear movement path of the contact head. This reduces mechanical interference and accidental collisions, facilitates cable routing and heat dissipation, and minimizes the impact of oil and dust on the sensing and transmission components. In the event of a power outage or abnormal shutdown, the return spring maintains the base clamping and pushes the actuator back to its original position, contributing to passive safety and predictable failure modes. The lead screw and contact head transmit force coaxially, and the rigid connection reduces lateral loads and guide wear, extending the service life of the guide and contact components. The modular structure facilitates component replacement and rapid recovery, reducing maintenance frequency and downtime. The entire machine maintains steady-state performance and reliable output even under long-term vibration and temperature cycling conditions. Attached Figure Description

[0024] Fig. 1 This is a schematic diagram of the main structure of an easy-to-install automotive pipe clamp device according to the present invention.

[0025] Fig. 2 This is a front sectional view of an easy-to-install automotive pipe clamp device according to the present invention.

[0026] Fig. 3 This is a schematic diagram of the induction actuator unit of an easy-to-install automotive pipe clamp device according to the present invention.

[0027] In the diagram: 1. Outer ring support; 2. Inner ring chain; 3. Clamping module; 31. Mounting base; 32. Swing arm; 33. Pipe contact head; 34. Return spring; 35. Pivot; 4. Sensing actuator; 41. Drive component; 42. Sensor. Detailed Implementation Example

[0028] like Figs. 1-3 , The device in this embodiment consists of an outer ring support 1 and an inner ring chain 2 coaxially assembled to form a ring frame. Multiple clamping modules 3 are mounted at equal angles on the inner ring chain 2. Each clamping module 3 includes a mounting base 31, a swing arm 32 rotatably connected to the mounting base 31 via a pivot 35, a pipe contact head 33 located at the front end of the swing arm 32 and having linear freedom of movement relative to the swing arm in the radial direction, a return spring 34 arranged along this linear direction, and a sensing execution unit 4 located on the side of the mounting base 31 facing away from the ring center. The sensing execution unit 4 includes a drive component 41 and a position sensor 42. The drive component 41 uses a micro motor to drive a lead screw through a reduction gear to form a linear output push rod, with the nut rigidly connected to the pipe contact head 33. The position sensor 42 detects the displacement and stroke end position of the push rod and outputs a position signal. A torsion spring is provided at the root of the swing arm 32 for swing arm return. The outer ring support 1 and the inner ring chain 2 are assembled via a floating connection that allows for slight displacement, giving the inner ring chain 2 a small compliant space in the radial and circumferential directions.

[0029] During assembly, the drive unit 41 is first fixed to the mounting base 31. The lead screw and nut are pre-installed on the linear sliding part at the front end of the swing arm 32, ensuring a rigid connection between the nut and the pipe contact head 33. Then, the return spring 34 is coaxially compressed and fitted into the linear motion channel of the pipe contact head 33, with a pre-compression applied. After the torsion spring at the root of the swing arm is positioned, it is installed into the mounting base 31 along with the pivot 35. The sensing execution unit 4 is placed on the side of the mounting base 31 facing away from the ring center and electrically connected to the position sensor 42, completing the integrated module. After these modules are distributed onto the inner ring chain 2, they are then assembled into a complete device via a floating connection with the outer ring support 1. After assembly, the execution unit performs zero-position calibration: the drive unit 41 returns the lead screw to the mechanical zero position, the position sensor 42 records the reference, and the controller establishes the stroke coordinates based on this.

[0030] During installation and use, the drive unit 41 first drives the lead screw to retract, causing the pipe contact head 33 to move outward in a straight line. The swing arm 32 returns to its initial angular position under the action of the torsion spring, and the radial opening of the inner ring chain 2 increases. After the device is fastened to the outer circumference of the vehicle pipeline, the drive unit 41 slowly advances, and the return spring 34 provides basic preload. The pipe contact head 33 approaches the outer wall of the pipe in a straight line. The position sensor 42 continuously collects displacement data. When it detects that the contact condition meets the displacement slope change or the motor current threshold is reached, the control logic enters the micro-feed stage: the drive unit 41 advances to the set holding position in small steps, completing the clamping process of first positioning and then applying force. The floating connection of the inner ring chain 2 absorbs installation deviations and pipe roundness errors during this process, so that the pipe contact heads 33 of each module are gradually and evenly stressed in the circumferential direction.

[0031] During operation, pipe displacement caused by vehicle vibration or temperature changes is accommodated by the floating connection between the outer and inner rings. The torsion spring at the root of the swing arm ensures the angular return, and the return spring 34 maintains the basic clamping. The position sensor 42 periodically provides feedback on the push rod displacement, and the sensing execution unit 4 makes minor adjustments to the drive component 41 based on the deviation to compensate for stroke changes caused by thermal expansion and contraction, gasket compression, or wear, maintaining the stability of the set clamping force and holding position. When unlocking is required, the drive component 41 retracts in the reverse direction, the return spring 34 is unloaded and drives the pipe contact head 33 back to its linear position, and the swing arm 32 returns to its initial angular position under the action of the torsion spring, allowing the device to be removed from the pipeline.

[0032] The working principle is based on the division of labor between angular and linear guidance. The swing arm 32 rotates around the pivot 35 to provide geometric guidance and an installation opening, while the torsion spring establishes the angular reference and return channel. The pipe contact head 33 only performs radial linear motion at the front end of the swing arm, and the return spring 34 provides continuous preload and return along the coaxial direction. The drive component 41 converts the motor's rotation into controllable linear displacement via a lead screw, and the nut is rigidly connected to the contact head 33 to achieve stable transmission of displacement and force. The position sensor 42 outputs displacement and end position signals, which the control logic uses to complete contact determination, micro-feeding, holding position limit, and abnormal retraction. Linear guidance reduces lateral friction and bias, the self-locking or weakly driven lead screw structure suppresses reverse free travel, the pre-compression spring weakens backlash and vibration-induced jitter, and the floating connection expands assembly tolerance and reduces stress concentration.

[0033] The implementation effect is reflected in three aspects: installation efficiency, clamping stability, and long-term reliability. During installation, repeated manual adjustments are unnecessary; the drive component 41 automatically completes positioning and force application, shortening assembly time. Multi-point linear clamping forms a ring-shaped contact zone, resulting in uniform clamping force distribution and gentler pressure on the pipe's outer wall, reducing local indentations and slippage. Closed-loop control continuously compensates for stroke changes during long-term operation, maintaining the set holding position and ensuring stable clamping even under vibration. When the device is powered off, the reset spring 34 drives the device back to its original position, creating passive safety and a predictable shutdown state. The sensing actuator 4 is located on the side opposite to the ring center, avoiding the straight path of the contact head 33, reducing mechanical interference and facilitating cable and protection. The slight floating of the inner ring chain 2 relative to the outer ring support 1 avoids overload caused by rigid over-constraint, extending the lifespan of transmission and guiding components and reducing maintenance frequency. This embodiment uses only conventionally machined parts; the lead screw pair, spring, sensor, and micro-motor are all common standard parts. The control algorithm is based on displacement thresholds and small-step micro-feed, enabling those skilled in the art to complete manufacturing and debugging. Example

[0034] Based on Embodiment 1, the device consists of an outer ring support 1 and an inner ring chain 2 coaxially forming a frame, with multiple clamping modules 3 mounted on the inner ring chain 2. Each clamping module 3 includes a mounting base 31, a swing arm 32 rotatably connected to the mounting base 31 via a pivot 35, a pipe contact head 33 located at the front end of the swing arm 32 and having radial linear freedom, a return spring 34 arranged in a linear direction, and a sensing execution unit 4 including a drive element 41 and a position sensing element 42. This solution can stably clamp under static or slight vibration conditions, but under the bumps and impacts generated by vehicle movement, the single fixed preload and displacement closed loop cannot adjust the clamping force in a timely and appropriate manner, easily leading to two types of problems: first, insufficient clamping force causes slight slippage of the contact surface and attitude drift; second, blindly applying force causes local crushing damage to the outer wall of the pipeline. The above problems indicate that the original solution lacks adaptability under different working conditions.

[0035] In this embodiment, a sensor is installed on the device to collect vibration information from the vehicle's existing inertial sensors. This information is input to the controller of the sensing execution unit 4, and the controller and the position sensor 42 together form a closed-loop adaptive clamping, including the following steps: S1: After power-on, the drive unit 41 returns to the mechanical zero position and completes the stroke calibration; the position sensor 42 establishes a zero point; the vibration sensor data is read and zero drift is deducted. With a small stroke excitation method, the contact head 33 makes a small reciprocating motion under the preload of the return spring 34, and the force-displacement slope and slip threshold are recorded for subsequent parameter estimation.

[0036] S2: The drive component 41 is advanced to the holding position, forming a basic clamping force, which is formed by the preload of the return spring and the small displacement drive. This holding position serves as the reference for subsequent adaptive adjustment, avoiding frequent full-stroke movements.

[0037] S3: The controller filters and calculates the root mean square of the triaxial acceleration within a fixed window τ (e.g., 0.5–2 s); simultaneously, it estimates the contact stiffness online using minute excitations and the displacement response of the position sensor 42. The following parameters with clearly defined physical meanings are obtained: a: Vibration intensity index is α rms (m / s) 2 ), the root mean square of the filtered acceleration within the window τ; Equivalent radial stiffness k eq (N / mm), obtained from the instantaneous slope of ΔF / Δx, reflects the combined stiffness of the contact head, spring, and pipe; c: anti-slip threshold force F b (N) represents the minimum normal force before the contact head begins to slip, which is derived from the identification of the slip point during minute reciprocating motion. d: Permissible radial compression δ allow (mm), based on the allowable strain ε of the pipe material allow Calculated with the outer diameter D, δ allow =ε allow ⋅D / 2. Calculated from the material's yield strength and elastic modulus, taking into account a safety factor.

[0038] S4: Defined to promptly increase clamping force during periods of increased turbulence, avoid excessive force application when contact stiffness increases, and compensate for the risk of slippage under low friction conditions.

[0039] Where α1, α2, and α3 are constants calibrated through road spectrum tests. The first term reflects the linear response to vibration intensity; the second term reflects that the greater the stiffness, the smaller the additional load caused by unit acceleration, and the gain is automatically suppressed; the third term is supplemented when the base clamping force is insufficient to exceed the anti-slip threshold. X is in Newtons and is directly used as the increment of the clamping force that needs to be increased.

[0040] S5: To avoid crushing the pipe wall due to excessive clamping, and considering the additional inertial load caused by bumps, an upper limit for clamping force is given within the allowable range of materials and structure:

[0041] Where b δ allow α4α represents the structural ultimate normal force that the material can withstand under the current equivalent stiffness and allowable compression. arms (The effects of pipeline linear density and span are converted into calibration constants). This formula uses the winding constraint of a, b, and d to make the safety upper limit dynamically change with material, geometry, and operating conditions.

[0042] S6: The basic clamping force F formed in Example 1 base Starting from the target, the normal force is obtained:

[0043] Where clip(⋅) represents the lower limit F min Limiting the amplitude between the upper limit Y and F; min Take equal to or slightly higher than F b The safety value. F ⋆ The displacement command Δx is converted from the equivalent stiffness. ⋆ =F ⋆ / k eq And smoothly tracked by the driving element according to the step time constant τ:

[0044] The aforementioned smoother suppresses high-frequency reciprocating vibrations, preventing oscillations from occurring under excitation conditions such as gravel roads and speed bumps. When α rms When the system decreases, X automatically decreases and Y automatically widens, and the system returns to a steady state with low force and low energy consumption.

[0045] The device continuously collects vibration data during vehicle movement and estimates contact stiffness and anti-slip threshold online. It provides the required force in real-time via X and the maximum allowable force synchronously via Y, ultimately generating a target normal force in a limited manner and converting it into a lead screw displacement command. This control couples bump intensity with structural stiffness, material tolerance, and anti-slip threshold, ensuring a more stable clamping under high bumps and automatic force reduction under low bumps, all constrained by the material's safety upper limit. By using the product of equivalent stiffness and permissible compression as the structural limit term, it directly reflects the pipeline's radial compression capacity; subtracting the equivalent inertial load term, which is proportional to the bump intensity, reflects the design principle that the total load does not exceed the material tolerance.

[0046] Compared to solutions that rely solely on fixed pre-tensioning or unidirectional force application, this embodiment employs parametric winding modeling of vibration intensity, equivalent stiffness, anti-slip threshold, and permissible material compressibility to obtain the vibration adaptation increment X and safety upper limit Y, respectively, and generates the target clamping force using a limited closed-loop method. This solution dynamically adapts between strong and weak bumps, achieving secure clamping without damaging the pipeline. It demonstrates clear engineering feasibility and verifiability, significantly improving the reliability and durability of the device under complex road conditions.

[0047] This application establishes a coupled calculation relationship with road bump intensity, contact equivalent stiffness, and anti-skid threshold as inputs to determine the required increase in clamping force. As bumps intensify, the required increment increases; as contact stiffness improves, the increment automatically decreases to avoid excessive force application under rigid support conditions; when the base clamping force is below the anti-skid limit, the difference is quantitatively compensated. These three types of parameters interact and act synchronously, moving beyond the segmented thresholds or fixed compensations of conventional schemes. This fundamentally resolves the concurrent contradiction between "insufficient clamping leading to slippage" and "excessive force application under high stiffness," forming a dynamic adaptation mechanism oriented towards real road spectra.

[0048] This application combines the permissible compressibility of the material with the equivalent contact stiffness to obtain the ultimate normal load that the structure can withstand, and then converges in real time to the upper limit of safety after the equivalent inertia introduced by the bumps consumes the safety margin. As a result, the three elements of material, geometry and operating conditions are simultaneously incorporated into the same safety constraint, and the safety boundary is adaptively updated with changes in operating conditions. This avoids the drawbacks of traditional fixed upper limits that fail under strong bumps or are too conservative under weak bumps, and directly reduces the risk of pipe wall damage, long-term creep and seal degradation.

[0049] This application generates target clamping through dual constraints of demand increment and safety upper limit, maps it to displacement command with equivalent stiffness, and then smoothly tracks it with a time constant to suppress high-frequency tracking vibration and mechanical shock. The closed-loop optimization formed by the anti-slip target on the demand side and the damage prevention boundary on the constraint side enables the device to achieve a continuous transition between strong and weak turbulence, achieving stable clamping, smaller contact pressure fluctuations, and lower energy consumption without changing the existing mechanism. This is significantly better than the fixed preload, single threshold, or open-loop force gain commonly found in the closest existing technologies.

Claims

1. An easy-to-install automotive pipe clamp device, characterized in that, include: Outer ring support (1); inner ring chain (2) coaxially arranged with the outer ring support (1); multiple clamping modules (3) distributed circumferentially, each clamping module (3) fixed to the inner ring chain (2) and arranged towards the center of the ring, each clamping module (3) including a mounting base (31) fixed to the inner ring chain (2), a swing arm (32) rotatably connected to the mounting base (31) via a pivot (35), a pipe contact head (33) disposed at the front end of the swing arm (32), and a return spring (34) arranged along the linear movement direction of the pipe contact head (33); the pipe contact head (33) has a radially perpendicular relationship with the swing arm (32). Linear motion degree of freedom; also includes a sensing execution unit (4) set on the clamping module (3), the sensing execution unit (4) includes a drive member (41) and a sensor (42), wherein the drive member (41) uses a micro motor to drive the lead screw through reduction to form a push rod linear output, and the nut is rigidly connected to the pipe contact head (33), so that the push rod of the drive member (41) performs displacement adjustment on the pipe contact head (33) along the linear motion direction; the sensor (42) is used to detect the displacement and stroke end position of the push rod and output a position signal; a torsion spring is set at the root of the swing arm (32) to make the swing arm (32) return to its original position.

2. The easy-to-install automotive pipe clamp device according to claim 1, characterized in that, The reset spring (34) is a coaxial compression spring with a pre-compression setting, which provides continuous pre-tension to the pipe contact head (33) and causes the pipe contact head (33) to return to its original position along the linear motion direction when released.

3. The easy-to-install automotive pipe clamp device according to claim 2, characterized in that, The sensor (42) provides the detected displacement and end position signals to the sensing and execution unit (4), and the sensing and execution unit (4) performs closed-loop control on the displacement and stop position of the drive (41) accordingly, so as to increase the clamping force of the pipe contact head (33) and limit the holding position after contact determination.

4. The easy-to-install automotive pipe clamp device according to claim 3, characterized in that, The lead screw of the drive component (41) is arranged coaxially with the linear motion direction of the pipe contact head (33). The nut is connected to the pipe contact head (33) through a rigid contact or an integral structure to reduce transmission gap and improve displacement resolution.

5. The easy-to-install automotive pipe clamp device according to claim 4, characterized in that, The reset spring (34) provides a basic clamping force to the pipe contact head (33), and the drive unit (41) performs displacement compensation and clamping force gain on the pipe contact head (33) based on the detection of the sensor (42).

6. The easy-to-install automotive pipe clamp device according to claim 5, characterized in that, The sensing and actuation unit (4) is located on the side of the mounting base (31) facing away from the center of the ring.

7. The easy-to-install automotive pipe clamp device according to claim 6, characterized in that, The inner ring chain (2) forms a small displacement degree of freedom relative to the outer ring support (1) through a floating connection structure, which is used to provide compliance when the clamped pipe is offset, and together with the circumferentially distributed clamping module (3), it achieves radial multi-point constraint and self-centering clamping.

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