A force balance constant force spring hanger

Abstract

This utility model belongs to the field of support and hanger technology, specifically relating to a force-balanced constant force spring support and hanger, including a fixed frame, two rotating mechanisms, a constant force mechanism, a rotating shaft, and a hanger rod. The rotating mechanism includes a rotating frame, a main shaft, an adjusting assembly, and a tie rod. The gears of the two rotating frames mesh with each other, and the upper rotating frame has a support arm on the side furthest from the constant force mechanism. A rotating shaft is installed between the support arms, and a hanger rod is mounted on the rotating shaft. This utility model, by setting two symmetrically arranged rotating frames and rigidly meshing their gears, enables them to rotate synchronously and mirror-symmetrically, thus forming a two-point, symmetrical force transmission. This fundamentally eliminates the harmful lateral forces in traditional structures, solves problems such as lateral rod deviation, pressure plate misalignment, and component wear and jamming caused by lateral forces, and significantly improves the accuracy and long-term reliability of the constant force output.

Description

Technical Field

[0001] This utility model belongs to the field of support and hanger technology, specifically relating to a force-balanced constant force spring support and hanger. Background Technology

[0002] Constant force spring supports are key support equipment in industrial pipeline systems. They are widely used in various pipelines in thermal power plant steam and water pipelines, power plant boiler bodies, petrochemicals, and other fields. They are used to bear the weight of the pipeline, compensate for thermal displacement and reduce stress concentration. They can also provide a nearly constant support force when the pipeline expands and contracts due to heat, thereby ensuring the safe and stable operation of the pipeline system.

[0003] Currently, the national standard constant force spring supports commonly used in China mainly consist of three parts: a fixed frame, a slewing mechanism, and a constant force mechanism. The slewing mechanism is hinged to the connecting rod in the constant force mechanism via a tie rod, thereby enabling force transmission and the movement of the mechanism.

[0004] However, existing constant force spring supports still have certain structural defects in actual operation. Specifically, the tie rod exerts a large lateral force on the connecting rod, which can cause the connecting rod to shift laterally, leading to the misalignment of the pressure plate connected to the connecting rod. The pressure plate is a key component for transmitting spring force; its misalignment results in uneven pressure distribution on the spring, affecting its performance and lifespan. It can also cause abnormal friction between the pressure plate and the guide rod, accelerating wear, increasing movement resistance, and even leading to jamming or noise problems. Utility Model Content

[0005] The purpose of this utility model is to provide a force-balanced constant force spring support, which solves the technical problems of lateral rod deviation, pressure plate skew, and abnormal wear of moving parts caused by lateral force in the prior art.

[0006] This utility model discloses a force-balanced constant force spring support bracket, comprising: Fixed frame; Two rotary mechanisms are symmetrically arranged inside the fixed frame, one above the other. A constant force mechanism is located at one end of the fixed frame; The rotary mechanism includes: A slewing frame, with a gear portion at its end near the other slewing mechanism; The main shaft is horizontally arranged inside the rotating frame and coaxially arranged with the gear part, and its two ends extend out of the rotating frame and are rotatably connected to the fixed frame. An adjustment component is installed inside the rotating frame; One end of the pull rod is rotatably connected to the adjusting assembly, and the other end is drive-connected to the constant force mechanism; The gears of the two rotating frames mesh with each other, and the upper rotating frame has a support arm on the side away from the constant force mechanism. A rotating shaft is installed between the support arms, and a suspension rod is provided on the rotating shaft.

[0007] This application sets up two symmetrically arranged rotating frames and uses gears to rigidly mesh them, so that the two can rotate synchronously and mirror symmetrically. This forms a two-point, symmetrical force transmission, which fundamentally eliminates the harmful lateral force in the traditional structure and solves the problems of connecting rod lateral deviation, pressure plate misalignment, and component wear and jamming caused by lateral force. It also significantly improves the accuracy and long-term reliability of constant force output.

[0008] Based on the above technical solution, the solution of this application can be further improved as follows: Preferably, the constant force mechanism includes: cylindrical body; A pressure plate is disposed inside the cylinder; An elastic structure is provided to support the pressure plate and the front end of the cylinder. Multiple guide rods are disposed inside the cylinder and arranged around the elastic structure, and form an axial sliding connection with the pressure plate; The connecting rod is connected to the pressure plate at one end and hinged to the pull rod at the other end. This design avoids pressure plate skewing, ensures precise alignment and pure axial movement of internal moving parts, and enables the elastic structure to work efficiently and reliably, guaranteeing long-term accuracy and stability.

[0009] Preferably, the cylindrical body comprises: The shell is a hollow cylindrical structure. The rear cover is located at the rear end of the cylindrical shell; A front cover is located at the front end of the cylindrical shell and has an opening for movement. The elastic structure is supported between the pressure plate and the front cover, and the pull rod extends into the elastic structure through the movable opening and is hinged to the connecting rod. This solution, through its split design, balances structural strength, sealing, assembly convenience, and functional realization, facilitating production, manufacturing, and maintenance.

[0010] Preferably, the rotating frame comprises: Two side panels, spaced apart from each other; A support plate is located between the ends of the two side plates away from the other rotary mechanism. This solution ensures structural stability and improves structural compactness, achieving efficient and stable force transmission while guaranteeing sufficient strength and rigidity.

[0011] Preferably, the adjustment component includes: Adjusting nut; U-shaped lugs are arranged between the two side plates; The stud has one end threadedly connected to the adjusting nut, and the other end passes through the support plate and is fixedly connected to the U-shaped lifting lug. A limiting shaft is arranged inside the U-shaped lug, with both ends extending out of the U-shaped lug; One end of the pull rod extends into the U-shaped lifting lug and is rotatably sleeved on the limiting shaft; a limiting groove is provided on the inner side of the side plate, and the two ends of the limiting shaft form a sliding fit with the adjacent limiting groove; by adopting this solution, the accuracy, stability and reliability of the hinge point adjustment are ensured through the combination of thread adjustment, U-shaped hinge and groove guidance, and the self-locking property is good and it is not easy to loosen.

[0012] Preferably, the fixed frame has adjustment ports on both sides, and the positions of the adjustment ports correspond to the adjustment nuts; this design facilitates the operator to rotate the adjustment nuts, thereby improving operational flexibility and portability.

[0013] Preferably, the rotating frame has first locking holes on both side walls, and the fixed frame has second locking holes on both side walls; the rotating mechanism also includes locking pins. When the slewing frame rotates to the predetermined position, the first locking hole and the second locking hole are coaxially aligned, and the locking pin can be inserted into the first locking hole and the second locking hole simultaneously to fix the slewing frame and the fixed frame relative to each other. By adopting this solution, the rotation of the slewing frame relative to the fixed frame can be prevented, thereby temporarily turning the entire support bracket into a rigid support point, ensuring the stability and safety of the support bracket during debugging, testing and shutdown maintenance, and also providing convenience for maintenance operations.

[0014] Through the above technical solution, this utility model achieves the following beneficial effects: This application sets up two symmetrically arranged rotating frames and uses gears to rigidly mesh them, so that the two can rotate synchronously and mirror symmetrically. This forms a two-point, symmetrical force transmission, which fundamentally eliminates the harmful lateral force in the traditional structure and solves the problems of connecting rod lateral deviation, pressure plate misalignment, and component wear and jamming caused by lateral force. It also significantly improves the accuracy and long-term reliability of constant force output. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of the force-balanced constant force spring support and hanger described in a specific embodiment of this application; Figure 2 for Figure 1 The diagram shows the structure of the constant force mechanism in the force-balanced constant force spring support. Figure 3 for Figure 1 The diagram shows the structure of the rotating frame in the force-balanced constant force spring support. Figure 4 for Figure 1 The diagram shows the structure of the fixed frame in a force-balanced constant force spring support. Explanation of reference numerals in the attached figures: 1. Fixed frame; 2. Rotary mechanism; 3. Constant force mechanism; 4. Rotating shaft; 5. Hanging rod; 11. Adjustment port; 12. Second locking hole; 21. Rotary frame; 21A. Gear section; 21B. Support arm section; 22. Main shaft; 23. Adjustment assembly; 24. Tie rod; 25. Locking pin; 31. Cylinder body; 32. Pressure plate; 33. Elastic structure; 34. Guide rod; 35. Connecting rod; 211. Side plate; 212. Support plate; 231. Adjusting nut; 232. U-shaped lifting lug; 233. Stud; 234. Limiting shaft; 311. Cylinder shell; 312. Rear cover; 313. Front cover; 2111, Limiting slide groove; 2112, First locking hole; 3131, Movable opening. Detailed Implementation

[0017] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0018] The terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include one or more of the stated features.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral 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 utility model according to the specific circumstances.

[0020] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0021] Example: like Figure 1 As shown in the embodiment of this application, a force-balanced constant force spring support hanger is disclosed, which effectively eliminates the problems of lateral deviation of the connecting rod 35, skewness of the pressure plate 32 and abnormal wear of moving parts caused by lateral force. The specific structure includes: a fixed frame 1, two rotating mechanisms 2, a constant force mechanism 3, a rotating shaft 4 and a hanging rod 5.

[0022] Fixed frame 1 is the main support structure, used to fix and support all other components.

[0023] Two rotating mechanisms 2 are symmetrically arranged inside the fixed frame 1, and are used to convert the load of the pipeline into a traction force on the constant force mechanism 3.

[0024] The constant force mechanism 3 is located at one end of the fixed frame 1 and is used to provide an approximately constant supporting force during the displacement of the pipeline.

[0025] Specifically, such as Figure 1 As shown, the rotary mechanism 2 includes: a rotary frame 21, a main shaft 22, an adjustment assembly 23, and a pull rod 24.

[0026] The rotating frame 21 serves as a skeleton for integrating and installing other components. It has a gear part 21A at its end near the other rotating mechanism 2. The gear part 21A is a key component for realizing the synchronous and symmetrical movement of the two rotating mechanisms 2. It is preferably integrally formed with the rotating frame 21.

[0027] The main shaft 22 is horizontally arranged inside the rotating frame 21 and coaxially arranged with the gear part 21A. Its two ends extend out of the rotating frame 21 and are rotatably connected to the fixed frame 1, serving as the rotation axis of the rotating frame 21 so that it can rotate relative to the fixed frame 1.

[0028] The adjustment component 23 is installed inside the slewing frame 21 and is used to fine-tune the distance between the end of the tie rod 24 and the main shaft 22, so that the load of the support can be precisely set and calibrated.

[0029] One end of the pull rod 24 is rotatably connected to the adjusting component 23, and the other end is drivenly connected to the constant force mechanism 3, which is used to convert the rotational motion of the slewing frame 21 into a traction force on the constant force mechanism 3.

[0030] Among them, the gear parts 21A of the two rotating frames 21 mesh with each other, and the upper rotating frame 21 has a support arm part 21B on the side away from the constant force mechanism 3. A rotating shaft 4 is installed between the support arms 21B, and a hanger 5 is provided on the rotating shaft 4. The hanger 5 is the final connection between the entire support and the pipeline.

[0031] It should be noted that the two rotating frames 21 are rigidly engaged by gears 21A, requiring them to rotate completely synchronously and symmetrically. Thus, when one rotating frame 21 rotates due to pipe displacement, it drives the other rotating frame 21 to perform the exact opposite motion via gears 21A. In this symmetrical motion, the vertical and lateral components of the forces exerted by the two tie rods 24 on the constant force mechanism 3 can cancel each other out, retaining only the resultant force in the horizontal direction. This avoids the problem of a single tie rod 24 generating a large lateral torque on the connection point of the constant force mechanism 3.

[0032] Understandably, the constant force mechanism 3 operates under a horizontal force, which allows it to run more precisely according to the torque balance principle, thereby reducing internal friction and interference, and thus improving the accuracy, stability, and service life of the constant force output.

[0033] This invention sets up two symmetrically arranged rotating frames 21, which are rigidly meshed by gears 21A, so that the two can rotate synchronously and mirror symmetrically. This forms a two-point, symmetrical force transmission, thereby fundamentally eliminating the harmful lateral force in the traditional structure. It solves the problems of lateral deviation of the connecting rod 35, skew of the pressure plate 32, and wear and jamming of parts caused by lateral force. It also significantly improves the accuracy and long-term reliability of constant force output.

[0034] In some embodiments, such as Figure 2 As shown, the constant force mechanism 3 includes: a cylinder 31, a pressure plate 32, an elastic structure 33, multiple guide rods 34, and a connecting rod 35.

[0035] The cylinder 31 is used to house the internal components and protect them from the influence of the external environment.

[0036] The pressure plate 32 is located inside the cylinder 31 and is used to convert the tension transmitted by the connecting rod 35 into the compressive force on the elastic structure 33, and to apply the force evenly to the end face of the elastic structure 33 to prevent it from deforming and being damaged due to uneven force.

[0037] The elastic structure 33 is supported between the pressure plate 32 and the front end of the cylinder 31 to provide a counterforce that balances the pipeline load.

[0038] Multiple guide rods 34 are disposed inside the cylinder 31 and arranged around the elastic structure 33, and form an axial sliding connection with the pressure plate 32. They are used to provide axial guidance for the movement of the pressure plate 32, forcing it to move only in a straight line and preventing the pressure plate 32 from lateral deflection.

[0039] One end of the connecting rod 35 is connected to the pressure plate 32, and the other end is hinged to the pull rod 24, which is used to transmit the tension of the pull rod 24 to the pressure plate 32.

[0040] When the pipeline sinks, the lowering rod 5 is pulled down. The rod 5 drives the rotating frame 21 to rotate through the support arm 21B. The rotating frame 21 pulls the tie rod 24 through the adjusting component 23. The tie rod 24 pulls the connecting rod 35 through the hinge point. The connecting rod 35 directly pulls the pressure plate 32, making it overcome the force of the elastic structure 33 and move along the guide rod 34 towards the front end of the cylinder 31. As a result, the elastic structure 33 is compressed, and the resulting reaction force increases. It then acts on the pipeline through the aforementioned transmission chain, ultimately achieving dynamic balance.

[0041] The design of the constant force mechanism 3 described above utilizes multiple guide rods 34 arranged around the perimeter and connected by connecting rods 35 in a hinged manner. This avoids the skewing of the pressure plate 32, ensures the centering of the internal moving parts and pure axial movement, and enables the elastic structure 33 to work efficiently and reliably, guaranteeing long-term accuracy and stability.

[0042] Based on the above embodiments, such as Figure 2 As shown, the cylinder 31 includes: The cylindrical shell 311 has a hollow cylindrical structure; The rear cover 312 is located at the rear end of the cylindrical shell 311; The front cover 313 is located at the front end of the cylindrical shell 311 and has an opening 3131; The elastic structure 33 is supported between the pressure plate 32 and the front cover 313, and the pull rod 24 extends into the elastic structure 33 through the movable port 3131 and is hinged to the connecting rod 35.

[0043] The design of the aforementioned cylinder 31, through its split design, takes into account structural strength, sealing performance, ease of assembly, and functional realization, making it convenient for production, manufacturing, inspection, and maintenance.

[0044] In some embodiments, such as Figure 1 As shown, the rotating frame 21 includes: Two side plates 211 are arranged at intervals to form a space in the middle to accommodate other components, and can be integrally formed with the gear part 21A and the support arm part 21B, thereby improving the structural stability. A support plate 212 is located between the ends of the two side plates 211 that are away from the other rotating mechanism 2, and is used to connect the ends of the two side plates 211, thereby enhancing the structural strength.

[0045] The design of the aforementioned rotating frame 21 ensures structural stability and improves structural compactness, achieving efficient and stable force transmission while guaranteeing sufficient strength and stiffness.

[0046] Based on the above embodiments, such as Figure 1 and Figure 3 As shown, the adjustment component 23 includes: Adjusting nut 231 is a component that performs the adjustment operation; The U-shaped lug 232 is arranged between the two side plates 211, and the U-shaped structure provides space for accommodating the end of the tie rod 24 and the limiting shaft 234; The stud 233 has one end threadedly connected to the adjusting nut 231, and the other end passes through the support plate 212 and is fixedly connected to the U-shaped lug 232. It is used to convert the rotational motion of the adjusting nut 231 into the linear motion of itself and the U-shaped lug 232. The limiting shaft 234 is arranged inside the U-shaped lug 232 and extends out of the U-shaped lug 232 at both ends. It serves as the rotation axis of the end of the pull rod 24, allowing the pull rod 24 to swing freely during movement, and also serves as a guide key to restrict the entire assembly to move only along the slide direction and not to rotate. One end of the pull rod 24 extends into the U-shaped lug 232 and is rotatably sleeved on the limiting shaft 234, ensuring the stability of the connection between the two; a limiting groove 2111 is provided on the inner side of the side plate 211, and the two ends of the limiting shaft 234 form a sliding fit with the adjacent limiting groove 2111, which is used to force the limiting shaft 234 to move only along the specific trajectory of the groove, ensuring the accuracy of the lever arm length.

[0047] When adjustment is needed, the operator rotates the adjusting nut 231, which drives the stud 233 to move axially along with the U-shaped lug 232. The U-shaped lug 232 drives the limiting shaft 234 to slide in the limiting groove 2111, changing its position. This directly adjusts the distance between the tie rod 24, which is hinged to it, and the main shaft 22, thus completing the adjustment of the support load.

[0048] The design of the aforementioned adjustment component 23, through the combination of threaded adjustment, U-shaped hinge and sliding groove guide, ensures the accuracy, stability and reliability of the hinge point adjustment, and has good self-locking properties, making it not easy to loosen.

[0049] Based on the above embodiments, such as Figure 1 , Figure 3 and Figure 4As shown, the fixed frame 1 has adjustment ports 11 on both sides, and the position of the adjustment ports 11 corresponds to the adjustment nut 231.

[0050] The aforementioned adjustment port 11 facilitates the operator's rotation of the adjustment nut 231, thereby improving operational portability and flexibility.

[0051] In some embodiments, such as Figure 1 As shown, the rotating frame 21 has first locking holes 2112 on both sides of its side walls, and the fixed frame 1 has second locking holes 12 on both sides of its side walls; the rotating mechanism 2 also includes locking pins 25.

[0052] When the rotating frame 21 rotates to the predetermined position, the first locking hole 2112 and the second locking hole 12 are coaxially aligned, and the locking pin 25 can be inserted into the first locking hole 2112 and the second locking hole 12 at the same time to fix the rotating frame 21 and the fixed frame 1 relative to each other.

[0053] The above design prevents the rotating frame 21 from rotating relative to the fixed frame 1, thereby temporarily turning the entire support into a rigid support point. This ensures the stability and safety of the support during commissioning, testing, and shutdown maintenance, and also provides convenience for maintenance operations.

[0054] Further explanation regarding this application: When the pipe shifts downwards, it causes the hanger 5 to move downwards. The hanger 5 then moves the rotating shaft 4 downwards as well. The downward movement of the rotating shaft 4 pulls the support arm 21B of the upper rotating frame 21, forcing the entire upper rotating frame 21 to rotate counterclockwise around its main shaft 22. Since the gears 21A of the upper and lower rotating frames 21 are meshed, the rotation of the upper rotating frame 21 forces the lower rotating frame 21 to rotate clockwise around its main shaft 22 in a completely synchronized but opposite direction.

[0055] While the upper slewing frame 21 rotates counterclockwise, the connection point between its adjusting component 23 and the pull rod 24 moves diagonally upward away from the constant force mechanism 3, thereby increasing the tension on the constant force mechanism 3; at the same time, when the lower slewing frame 21 rotates clockwise, the connection point between its adjusting component 23 and the pull rod 24 also moves diagonally downward away from the constant force mechanism 3, thereby increasing the tension on the constant force mechanism 3.

[0056] Since the two levers 24 move in opposite directions in the vertical direction, the vertical component forces (lateral forces) they generate on the connection point of the constant force mechanism 3 are also in opposite directions, and thus can cancel each other out; ultimately, the constant force mechanism 3 mainly receives a resultant force in the horizontal direction with varying magnitude.

[0057] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0058] In the description of this specification, the references to terms such as "one 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 the present invention. 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 may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A force-balanced constant-force spring support, characterized in that, include: Fixed frame; Two rotary mechanisms are symmetrically arranged inside the fixed frame, one above the other. A constant force mechanism is located at one end of the fixed frame; The rotary mechanism includes: A slewing frame, with a gear portion at its end near the other slewing mechanism; The main shaft is horizontally arranged inside the rotating frame and coaxially arranged with the gear part, and its two ends extend out of the rotating frame and are rotatably connected to the fixed frame. An adjustment component is installed inside the rotating frame; One end of the pull rod is rotatably connected to the adjusting assembly, and the other end is drive-connected to the constant force mechanism; The gears of the two rotating frames mesh with each other, and the upper rotating frame has a support arm on the side away from the constant force mechanism. A rotating shaft is installed between the support arms, and a suspension rod is provided on the rotating shaft.

2. The force-balanced constant-force spring support according to claim 1, characterized in that, The constant force mechanism includes: cylindrical body; A pressure plate is disposed inside the cylinder; An elastic structure is provided to support the pressure plate and the front end of the cylinder. Multiple guide rods are disposed inside the cylinder and arranged around the elastic structure, and form an axial sliding connection with the pressure plate; The connecting rod is connected to the pressure plate at one end and hinged to the pull rod at the other end.

3. The force-balanced constant-force spring support according to claim 2, characterized in that, The cylindrical body includes: The shell is a hollow cylindrical structure. The rear cover is located at the rear end of the cylindrical shell; A front cover is located at the front end of the cylindrical shell and has an opening for movement. The elastic structure is supported between the pressure plate and the front cover, and the pull rod extends into the elastic structure through the movable opening and is hinged to the connecting rod.

4. The force-balanced constant-force spring support according to claim 1, characterized in that, The slewing frame includes: Two side panels, spaced apart from each other; A support plate is disposed between the ends of the two side plates away from the other rotary mechanism.

5. The force-balanced constant-force spring support according to claim 4, characterized in that, The adjustment component includes: Adjusting nut; U-shaped lugs are arranged between the two side plates; The stud has one end threadedly connected to the adjusting nut, and the other end passes through the support plate and is fixedly connected to the U-shaped lifting lug. A limiting shaft is arranged inside the U-shaped lug, with both ends extending out of the U-shaped lug; One end of the pull rod extends into the U-shaped lug and is rotatably sleeved on the limiting shaft; a limiting groove is provided on the inner side of the side plate, and the two ends of the limiting shaft form a sliding fit with the adjacent limiting groove.

6. The force-balanced constant-force spring support according to claim 5, characterized in that, The fixed frame has adjustment ports on both sides, and the positions of the adjustment ports correspond to the adjustment nuts.

7. The force-balanced constant-force spring support according to claim 1, characterized in that, The rotating frame has first locking holes on both sides of its side walls, and the fixed frame has second locking holes on both sides of its side walls; the rotating mechanism also includes locking pins. When the rotating frame rotates to the predetermined position, the first locking hole and the second locking hole are coaxially aligned, and the locking pin can be inserted into the first locking hole and the second locking hole at the same time to fix the rotating frame and the fixed frame relative to each other.

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