A pressurized spring seat

Abstract

This utility model provides a pressure spring seat, belonging to the technical field of elastic buffer mechanisms. The pressure spring seat includes a seat body, a pressure cap, a guide post, and a spring limiting ring. The seat body has a cylindrical structure, and an annular boss is provided at the bottom of the seat body. The outer diameter of the annular boss is smaller than the outer diameter of the seat body, and a spring mounting cavity is formed on the inner side of the annular boss. The pressure cap is located at the top opening of the seat body and is connected to the seat body by threads. A through hole is provided at the center of the pressure cap. The lower end of the guide post is fixedly connected to the geometric center of the bottom of the seat body. The guide post extends upward and passes through the through hole of the pressure cap. A limiting shoulder is provided at the upper end of the guide post. The spring limiting ring is sleeved on the outer circumferential surface of the guide post and is located inside the spring mounting cavity. An annular gap is formed between the outer circumferential surface of the spring limiting ring and the inner wall of the seat body. This utility model can solve the problems of inaccurate spring positioning, low self-guiding accuracy, and poor overall performance in existing spring seat structures.

Description

Technical Field

[0001] This utility model belongs to the technical field of elastic buffer mechanism, specifically, it relates to a pressure spring seat. Background Technology

[0002] Springs, as important elastic elements, are widely used in buffering, shock absorption, energy storage, and force application mechanisms of various equipment. To ensure a stable elastic force during operation, a dedicated spring seat device is typically used to apply an appropriate preload, keeping the spring in a pre-compressed state. Existing spring seats commonly employ a simple cylindrical structure with end caps for clamping, using bolts or clips to fix the end caps to the cylinder, achieving axial compression of the spring. However, this traditional structure has several shortcomings. First, the spring's positioning accuracy within the cylinder is poor, making it prone to eccentricity or tilting during installation, resulting in uneven force distribution after compression. Second, the lack of an effective guiding mechanism allows the spring to easily move radially or rotate during repeated compression and release. After prolonged use, the spring experiences severe friction and wear against the inner wall of the cylinder. Furthermore, the structural strength design of the cylinder and end cap is unreasonable, making them prone to deformation under high preload, thus affecting the spring's performance. Additionally, the existing spring seat has poor heat dissipation, leading to a significant temperature increase during high-frequency reciprocating operation, accelerating the fatigue aging of the spring material. The sealing effect at the connection between the end cap and the cylinder is also poor, allowing external contaminants to easily penetrate and affect the spring's lifespan. To address these technical problems, existing technologies mainly employ methods such as adding guide rods, installing bearing sleeves, thickening the cylinder wall, or adding cooling devices. However, these solutions often result in complex structures, increased number of parts, and higher processing costs, and still fail to fundamentally solve the problems of inaccurate spring positioning, low guiding accuracy, and poor overall performance. Utility Model Content

[0003] In view of this, the present invention provides a pressure spring seat that can solve the problems of inaccurate spring positioning, low self-guiding accuracy and poor overall performance in the existing spring seat structure.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a pressure spring seat, including a seat body, a pressure cap, a guide post, and a spring limiting ring. The seat body has a cylindrical structure, and an annular boss is provided at the bottom of the seat body. The outer diameter of the annular boss is smaller than the outer diameter of the seat body, and a spring mounting cavity is formed on the inner side of the annular boss. The pressure cap is located at the top opening of the seat body and is connected to the seat body by threads. A through hole is provided at the center of the pressure cap. The lower end of the guide post is fixedly connected to the geometric center of the bottom of the seat body. The guide post extends upward and passes through the through hole of the pressure cap. A limiting shoulder is provided at the upper end of the guide post. The spring limiting ring is sleeved on the outer circumferential surface of the guide post. The spring limiting ring is located inside the spring mounting cavity. An annular gap is formed between the outer circumferential surface of the spring limiting ring and the inner wall of the seat body. The distance between the upper surface of the spring limiting ring and the inner side of the pressure cap is greater than the distance between the lower surface of the spring limiting ring and the upper surface of the annular boss.

[0006] The technical advantages of the pressure spring seat provided by this utility model are as follows: A spring mounting cavity is formed by an annular boss at the bottom of the seat body. The spring is axially compressed by a threaded connection with a pressure cap. A guide post passes through the center of the pressure cap and has a limiting shoulder at its upper end, ensuring that the spring moves axially along the guide post without deviation during compression. A spring limiting ring is sleeved on the outer circumference of the guide post and located inside the spring mounting cavity. Its outer circumference surface forms an annular gap with the inner wall of the seat body, allowing the spring to be evenly stressed during compression. At the same time, the design of the distance difference between the upper and lower surfaces of the spring limiting ring and the pressure cap and annular boss provides a reasonable compression stroke space for the spring. The overall structure is simple and compact, easy to install and adjust, and can achieve reliable pre-tightening and stable guidance of the spring.

[0007] Based on the above technical solution, the pressure spring seat of this utility model can be further improved as follows:

[0008] The outer wall of the seat has multiple heat dissipation grooves along the axial direction. The heat dissipation grooves extend along the generatrix of the seat and the depth of the heat dissipation grooves is one-third to one-half of the thickness of the seat wall.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: multiple heat dissipation grooves are set along the axial direction on the outer wall of the seat. The heat dissipation grooves extend along the generatrix direction and the depth is controlled to be one-third to one-half of the wall thickness. This design significantly increases the outer surface area of ​​the seat without affecting the overall strength of the seat, effectively improving the heat dissipation performance of the seat. When the pressure spring seat generates heat due to repeated compression and release of the spring during long-term operation, the heat dissipation grooves can accelerate the transfer of heat to the external environment, preventing the seat temperature from being too high and affecting the elastic performance and service life of the spring. At the same time, the setting of the heat dissipation grooves also reduces the overall weight of the seat.

[0010] Furthermore, the outer periphery of the gland is provided with multiple evenly distributed operating protrusions, which are arranged at intervals along the circumference of the gland, and the top surface of the operating protrusions has an arc-shaped protrusion structure.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: multiple evenly distributed operating protrusions are set on the outer periphery of the cap. The operating protrusions are arranged circumferentially and the top surface has an arc-shaped protrusion structure, which provides the operator with a force point that is easy for fingers or tools to grip. When rotating the cap for installation or adjustment, the operating protrusions can effectively increase the friction and force application area, making it easier for the operator to apply torque. The arc-shaped protrusion top surface design conforms to the ergonomic principle, making it more comfortable for fingers to press and less likely to slip, thus improving the convenience and safety of operation. At the same time, the evenly distributed design ensures the balance of force application and avoids the cap from tilting due to uneven force.

[0012] Furthermore, the outer surface of the guide post is provided with a spiral guide groove along the axial direction. The spiral helix angle of the spiral guide groove is 15°~30°, and the groove depth is one-tenth to one-eighth of the diameter of the guide post.

[0013] The beneficial effects of adopting the above-mentioned improved scheme are as follows: a spiral guide groove is set along the axial direction on the outer surface of the guide post, the helix angle of the spiral guide groove is controlled between 15° and 30°, and the groove depth is one-tenth to one-eighth of the diameter of the guide post. This spiral guide groove structure can guide the inner ring of the spring during the compression and release process, so that the spring can obtain a slight rotational tendency while moving axially, effectively eliminating the radial offset of the spring caused by manufacturing errors or installation deviations, ensuring that the spring always remains coaxial with the guide post. The spiral guide groove can also store the lubricating medium, reduce the friction between the spring and the guide post, and extend the service life. At the same time, the reasonable groove depth design ensures the guiding effect without excessively weakening the strength of the guide post.

[0014] Furthermore, the inner hole of the spring limiting ring has a tapered structure, and the taper of the tapered structure gradually decreases from top to bottom. The inner diameter of the upper end of the spring limiting ring is larger than the inner diameter of the lower end.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the inner hole of the spring limiting ring is designed as a conical structure, with the taper gradually decreasing from top to bottom so that the inner diameter at the upper end is larger than that at the lower end. This gradual conical design can provide step-by-step support for the inner ring of the spring during the spring compression process. When the spring is subjected to axial pressure, the spring ring will contract inward. The shape of the conical inner hole matches the deformation trend of the spring, so that the inner ring of the spring can slide smoothly along the conical surface and obtain uniform radial support force, effectively preventing the inner ring from seizing or becoming unstable when the spring is compressed at a large amount. At the same time, the conical structure facilitates the installation and positioning of the spring. When the spring is inserted, it can be automatically guided and accurately positioned, improving assembly efficiency and reliability.

[0016] Furthermore, the upper surface of the annular boss is provided with multiple radially distributed positioning protrusions, the number of which is 4 to 8. The positioning protrusions have a trapezoidal cross-sectional structure, and the height of the positioning protrusions gradually decreases from the inside to the outside along the radial direction.

[0017] The beneficial effects of the above-mentioned improvement scheme are as follows: Multiple positioning protrusions are set on the upper surface of the annular boss in a radial distribution. The number of positioning protrusions is 4 to 8 and they have a trapezoidal cross-section structure. The height of the positioning protrusions gradually decreases from the inside to the outside along the radial direction. This design provides a multi-point precise positioning function for the bottom end of the spring. The lower end ring of the spring can be embedded in the gap between adjacent positioning protrusions to achieve dual circumferential and radial limiting, effectively preventing the spring from rotating or moving laterally during operation. The trapezoidal cross-section and gradually changing height design make the positioning protrusions have a guiding function, which makes it easy for the spring to quickly find the correct position during installation. At the same time, the radial distribution ensures the uniformity of the force on the bottom end of the spring, avoiding the spring tilting or uneven force on the seat due to excessive force on one side.

[0018] Furthermore, annular reinforcing ribs are provided on the inner wall of the seat in the area of ​​the spring mounting cavity. The annular reinforcing ribs are continuously arranged along the axial direction of the seat, and the thickness of the annular reinforcing ribs is one-fifth to one-quarter of the thickness of the seat wall.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: A ring-shaped reinforcing rib is set on the inner wall of the seat body in the area of ​​the spring mounting cavity. The ring-shaped reinforcing rib is continuously set along the axial direction of the seat body and its thickness is controlled to be one-fifth to one-quarter of the seat body wall thickness. This ring-shaped reinforcing rib significantly improves the seat body's resistance to deformation in the radial direction. When the spring generates a large radial expansion force during compression, the reinforcing rib can effectively constrain the radial deformation of the inner wall of the seat body, maintain the dimensional stability of the spring mounting cavity, and ensure that the spring always moves within a predetermined spatial range. At the same time, the ring-shaped reinforcing rib enhances the overall stiffness of the seat body, enabling the seat body to withstand greater axial loads without buckling instability. The reasonable thickness design achieves the reinforcement effect while avoiding excessive increase in weight and material costs.

[0020] Furthermore, the inner surface of the gland is provided with multiple evenly distributed radial reinforcing ribs, which extend radially from the center of the gland to the outer peripheral edge, and the cross-section of the radial reinforcing ribs is triangular.

[0021] The beneficial effects of the above-mentioned improvement scheme are as follows: multiple evenly distributed radial reinforcing ribs are set on the inner side of the gland. The radial reinforcing ribs extend radially from the center of the gland to the outer periphery and adopt a triangular cross-section structure. This reinforcing rib layout greatly improves the bending stiffness and load-bearing capacity of the gland. When the spring applies axial pressure to the gland, the radial reinforcing ribs can evenly distribute the load concentrated in the central area to the outer periphery of the gland, avoiding the depression deformation of the center part of the gland due to excessive force. The triangular cross-section structure achieves the largest bending section modulus with the minimum material usage. At the same time, the radial arrangement forms a grid-like support system, giving the gland isotropic mechanical properties and ensuring that it can maintain shape stability when subjected to force in any direction.

[0022] Furthermore, a sealing groove is provided at the threaded connection between the seat and the gland. The sealing groove is located at the top of the external thread of the seat and has an annular structure. The width of the sealing groove is one-half to three-quarters of the thread pitch.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: A sealing groove is set at the top of the external thread of the seat at the threaded connection between the seat body and the gland. The sealing groove has a ring structure and the width is controlled to be one-half to three-quarters of the thread pitch. This sealing groove design provides a dedicated space for installing sealing rings or filling sealing materials, effectively preventing external dust, moisture or other contaminants from entering the spring mounting cavity through the thread gap, protecting the spring and internal moving parts from corrosion and wear. At the same time, the setting of the sealing groove can also reduce the stress concentration at the threaded connection to a certain extent and improve the fatigue strength of the connection. The reasonable groove width design ensures the sealing effect without excessively weakening the effective bearing area of ​​the thread, ensuring the reliability of the threaded connection.

[0024] Furthermore, the limiting shoulder of the guide post has a disc-shaped structure, the diameter of the limiting shoulder is 1.5 to 2 times larger than the diameter of the main body of the guide post, the thickness of the limiting shoulder is one-quarter to one-third of the diameter of the main body of the guide post, and a rounded transition area is formed between the lower surface of the limiting shoulder and the outer surface of the main body of the guide post.

[0025] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The limiting shoulder of the guide post is designed as a disc-shaped structure, with a diameter of 1.5 to 2 times the diameter of the main body of the guide post and a thickness of one-quarter to one-third of the diameter of the main body. A rounded transition area is formed between the lower surface of the limiting shoulder and the outer surface of the main body of the guide post. This size ratio design gives the limiting shoulder a sufficiently large bearing area, which can effectively withstand the axial pressure transmitted by the spring through the spring limiting ring without plastic deformation. The rounded transition area eliminates the stress concentration phenomenon at the abrupt cross section, significantly improves the fatigue strength of the connection between the limiting shoulder and the guide post, and prevents fatigue fracture during long-term repeated stress. At the same time, the reasonable diameter ratio and thickness ratio ensure structural strength while avoiding excessive increase in the weight of the upper end of the guide post, maintaining the balance of the overall structure.

[0026] Compared with existing technologies, the advantages of this utility model for providing a pressure spring seat are as follows: Through the integrated design of the annular boss at the bottom of the seat body and the spring mounting cavity, combined with the adjusting mechanism of the threaded connection of the pressure cap, precise control and convenient adjustment of the axial clamping force of the spring are achieved. The structure of the guide post passing through the center of the pressure cap and having a limiting shoulder at the upper end provides precise guidance for the spring throughout its entire stroke, effectively preventing the spring from shifting and becoming unstable during compression. The tapered inner hole design of the spring limiting ring, in conjunction with the spiral guide groove on the outer surface of the guide post, allows the spring to obtain uniform radial support and slight rotational guidance during axial movement, eliminating the influence of manufacturing and installation errors. The radial positioning protrusions on the annular boss serve as spring... The bottom provides multi-point precise positioning to ensure accurate spring installation and uniform force distribution. The axial heat dissipation grooves on the outer wall of the seat significantly improve heat dissipation performance and effectively reduce the impact of working temperature on spring performance. The operating protrusions on the outer periphery of the pressure cap and the radial reinforcing ribs on the inner side improve ease of operation and structural strength, respectively. The annular reinforcing ribs on the inner wall of the seat and the sealing grooves at the threaded connections further improve overall rigidity and sealing reliability. The entire device has a simple and compact structure, fewer parts, and is easy to process and assemble. Compared with existing technologies, it has significant advantages such as high guiding accuracy, high structural strength, good heat dissipation performance, reliable sealing, convenient operation, and long service life. It can be widely used in various mechanical equipment that require spring preload. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of a pressure spring seat;

[0029] Figure 2 A schematic diagram showing the location of the protrusion on the annular boss;

[0030] Figure 3 A schematic diagram of the annular boss at the bottom of the seat body;

[0031] Figure 4 This is a schematic diagram of the internal cross-section of the seat body;

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 10. Seat; 11. Pressure cap; 12. Guide post; 13. Spring limiting ring; 14. Annular boss; 15. Spring mounting cavity; 16. Limiting shoulder; 17. Heat dissipation groove; 18. Operating protrusion; 19. Spiral guide groove; 20. Positioning protrusion; 21. Annular reinforcing rib; 22. Sealing groove. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0035] like Figure 1-4 The image shows an embodiment of a pressure spring seat provided by this utility model. In this embodiment, it includes a seat body 10, a pressure cap 11, a guide post 12, and a spring limiting ring 13. The seat body has a cylindrical structure, and an annular boss 14 is provided at the bottom of the seat body. The outer diameter of the annular boss is smaller than the outer diameter of the seat body, and a spring mounting cavity 15 is formed on the inner side of the annular boss. The pressure cap is provided at the top opening of the seat body, and the pressure cap is connected to the seat body by threads. A through hole is provided at the center of the pressure cap. The lower end of the guide post is fixedly connected to the geometric center of the bottom of the seat body. The guide post extends upward and passes through the through hole of the pressure cap. A limiting shoulder 16 is provided at the upper end of the guide post. The spring limiting ring is sleeved on the outer circumferential surface of the guide post. The spring limiting ring is located inside the spring mounting cavity. An annular gap is formed between the outer circumferential surface of the spring limiting ring and the inner wall of the seat body. The distance between the upper surface of the spring limiting ring and the inner side of the pressure cap is greater than the distance between the lower surface of the spring limiting ring and the upper surface of the annular boss.

[0036] In the above technical solution, multiple heat dissipation grooves 17 are provided along the axial direction on the outer wall surface of the seat. The heat dissipation grooves extend along the generatrix direction of the seat and the depth of the heat dissipation grooves is one-third to one-half of the thickness of the seat wall.

[0037] Furthermore, in the above technical solution, the outer peripheral edge of the pressure cap is provided with a plurality of evenly distributed operating protrusions 18, the operating protrusions are arranged at intervals along the circumference of the pressure cap, and the top surface of the operating protrusions has an arc-shaped protrusion structure.

[0038] Furthermore, in the above technical solution, the outer surface of the guide post is provided with a spiral guide groove 19 along the axial direction, the spiral helix angle of the spiral guide groove is 15°~30°, and the groove depth of the spiral guide groove is one-tenth to one-eighth of the diameter of the guide post.

[0039] Furthermore, in the above technical solution, the inner hole of the spring limiting ring has a tapered structure, and the taper of the tapered structure gradually decreases from top to bottom. The inner diameter of the upper end of the spring limiting ring is larger than the inner diameter of the lower end.

[0040] Furthermore, in the above technical solution, the upper surface of the annular boss is provided with a plurality of radially distributed positioning protrusions 20, the number of which is 4 to 8, the positioning protrusions have a trapezoidal cross-sectional structure, and the height of the positioning protrusions gradually decreases from the inside to the outside along the radial direction.

[0041] Furthermore, in the above technical solution, an annular reinforcing rib 21 is provided on the inner wall surface of the seat body in the area of ​​the spring mounting cavity. The annular reinforcing rib is continuously arranged along the axial direction of the seat body, and the thickness of the annular reinforcing rib is one-fifth to one-quarter of the thickness of the seat body wall.

[0042] Furthermore, in the above technical solution, the inner side of the gland is provided with multiple evenly distributed radial reinforcing ribs, which extend radially from the center of the gland to the outer peripheral edge, and the cross-section of the radial reinforcing ribs is triangular.

[0043] Furthermore, in the above technical solution, a sealing groove 22 is provided at the threaded connection between the seat and the gland. The sealing groove is located at the top of the external thread of the seat, and the sealing groove has an annular structure. The width of the sealing groove is one-half to three-quarters of the thread pitch.

[0044] Furthermore, in the above technical solution, the limiting shoulder of the guide post has a disc-shaped structure, the diameter of the limiting shoulder is 1.5 to 2 times larger than the diameter of the main body of the guide post, the thickness of the limiting shoulder is one-quarter to one-third of the diameter of the main body of the guide post, and a rounded transition area is formed between the lower surface of the limiting shoulder and the outer surface of the main body of the guide post.

[0045] The method of using this utility model is as follows: First, fix the base body on the support base of the equipment, ensuring that the annular boss at the bottom of the base body provides stable support. Then, take the spring to be installed and align the lower end of the spring with the radial positioning protrusions on the annular boss, so that the lower end of the spring is embedded in the gap between the adjacent positioning protrusions. At this time, the spring obtains preliminary circumferential and radial positioning. Next, put the spring limiting ring on the guide post from above, so that the limiting ring descends along the guide post into the spring mounting cavity. The conical inner hole of the spring limiting ring will automatically guide and slide to the appropriate position. Then, put the spring on the outer circumference of the guide post, so that the guide post passes through the center hole of the spring. The inner ring of the spring contacts and engages with the spiral guide groove on the outer surface of the guide post. At this time, the spring has completed preliminary installation and positioning. Then, take the pressure cap and align it with the top opening of the base body, so that the upper end of the guide post passes through the through hole in the center of the pressure cap. Rotate the pressure cap to make it engage with the external thread of the base body. Continue to rotate the pressure cap to make it gradually descend. The inner side of the pressure cap opens. The pressure cap begins to rotate, initially contacting the upper surface of the spring limiting ring. This rotation applies downward pressure to the spring limiting ring, which then transmits this pressure to the spring, causing axial compression. The number of rotations of the pressure cap is controlled according to the required preload. Rotation stops once the predetermined compression is reached, at which point the spring is in a pre-compressed state. The limiting shoulder of the guide post restricts the maximum compression stroke of the spring, preventing over-compression and damage. During operation, the spring operates in a pre-compressed state. When an external load is applied, the spring further compresses to absorb energy. After the load is removed, the spring releases energy and returns to its pre-compressed state. Throughout the entire process, the guide post provides precise guidance to the spring. The tapered inner hole of the spring limiting ring automatically adjusts its support position as the spring deforms, ensuring the spring always maintains coaxial movement. Adjusting the preload is simple and quick; simply rotate the pressure cap to change its axial position. No disassembly of other components is required.

[0046] The following is a specific embodiment 1 of this utility model: This embodiment provides a pressure spring seat for industrial stamping equipment. The seat body is made of 45# carbon structural steel and is machined into a cylindrical structure with an outer diameter of 80mm, an inner diameter of 65mm, and a height of 120mm. An annular boss is integrally machined at the bottom of the seat body. The annular boss has an outer diameter of 72mm, an inner diameter of 40mm, and a height of 15mm. A spring mounting cavity with a depth of 105mm is formed on the inner side of the annular boss. Eight heat dissipation grooves are evenly opened along the axial direction on the outer wall of the seat body. Each heat dissipation groove is 6mm wide and 3mm deep. The heat dissipation grooves extend downward from the top of the seat body to 20mm from the bottom. The linear arrangement along the generatrix includes six radially evenly distributed positioning protrusions on the upper surface of the annular boss. Each positioning protrusion has a trapezoidal cross-section, with an upper base width of 4mm, a lower base width of 8mm, and a height gradually decreasing from 12mm on the inner side to 6mm on the outer side. Adjacent positioning protrusions form a 15mm wide arc-shaped groove. An annular reinforcing rib is provided on the inner wall of the seat at a position 30mm from the top. This rib is continuously arranged circumferentially, with a thickness of 2mm and a height of 8mm. The pressure cap is made of the same 45# carbon structural steel material, and is disc-shaped with an outer diameter of 88mm and a thickness of 25mm. The outer circumference of the pressure cap is machined with internal threads that mate with the seat body. A diameter [missing information] is located at the center of the pressure cap. The cover features an 18mm through hole. Six operating protrusions are evenly distributed along the outer edge of the cover, spaced 60 degrees circumferentially. Each protrusion is 12mm wide, 5mm high radially, and has a top arc surface with an 8mm radius. Eight radial reinforcing ribs are evenly distributed from the center outwards on the inner side of the cover. These ribs have a triangular cross-section, a base width of 4mm, and a height of 6mm. A 1mm wide and 1.5mm deep annular sealing groove is formed at the top of the external thread of the seat. The guide post is made of 40Cr alloy structural steel and has undergone heat treatment. The main body of the guide post has a diameter of 16mm and a length of 150mm. The lower end of the guide post is fixedly connected to the seat via an M12 thread. At the center of the bottom of the body, a spiral guide groove is machined axially on the outer surface of the guide post. The spiral guide groove has a helix angle of 22°, a width of 2mm, and a depth of 1.8mm. The spiral guide groove is a right-hand spiral structure. A disc-shaped limiting shoulder with a diameter of 28mm and a thickness of 5mm is machined at the upper end of the guide post. The lower surface of the limiting shoulder and the outer surface of the main body of the guide post are transitioned by an arc with a radius of 3mm. The spring limiting ring is made of aluminum alloy. The outer diameter of the limiting ring is 62mm and the total height is 35mm. The inner hole of the limiting ring has a conical structure with an upper inner diameter of 20mm and a lower inner diameter of 16.5mm. The taper is 1:10. The outer circumference of the limiting ring is smooth and forms a 1-degree gap with the inner wall of the seat.The compression spring, with a 5mm annular gap, is made of 60Si2Mn spring steel wire. It has an outer diameter of 60mm, an inner diameter of 40mm, a free height of 100mm, 8 effective coils, and a wire diameter of 6mm. Both ends of the spring are ground smooth. During installation, the lower coil of the spring is embedded into the groove formed by the positioning protrusion. The inner coil of the spring is fitted around the guide post and engages with the spiral guide groove. The spring limiting ring is placed inside the spring and fitted onto the guide post. After the pressure cap is screwed in, a pre-compression of 30mm is applied to the spring, generating a preload of approximately 2000N. During operation, the spring undergoes axial compression and release under the precise guidance of the guide post. The spiral guide groove guides the spring to rotate approximately 4° for every 10mm of compression, effectively eliminating uneven force distribution between the spring coils. The tapered inner hole of the spring limiting ring gradually increases its contact area with the guide post as the spring compression increases, providing continuous and stable radial support for the inner coil of the spring. The trapezoidal shape of the positioning protrusion... The cross-section and gradually increasing height design allow the bottom of the spring to automatically center itself when subjected to axial force. The annular reinforcing ribs effectively constrain the radial deformation of the seat, ensuring that the radial deformation is less than 0.05mm when subjected to a 3000N axial load. Eight heat dissipation grooves on the outer wall of the seat increase the surface area by approximately 35%, reducing the seat temperature by about 18℃ compared to structures without heat dissipation grooves during continuous operation. Eight radial reinforcing ribs on the inner side of the pressure cap form a grid support structure, ensuring that the deflection in the central area of ​​the pressure cap is less than 0.03mm when subjected to axial pressure. Fluororubber O-rings are installed in the sealing groove to effectively prevent external dust and moisture from entering the spring mounting cavity. The entire device operates continuously in the stamping equipment, providing stable elastic support for the stamping mechanism. Long-term use has verified that the spring's working condition is stable, without any deviation, tilting, or abnormal wear. All components of the pressure spring seat maintain good shape and dimensional accuracy, meeting the high reliability requirements of stamping equipment for spring preload devices.

[0047] The following is another specific embodiment 2 of this utility model: This embodiment is an improved design based on embodiment 1, specifically for high-temperature working environments. The seat material is changed to 1Cr18Ni9Ti stainless steel with better heat resistance. The number of heat dissipation grooves on the outer wall of the seat is increased to 12, with the width of each groove increased to 8mm and the depth increased to 4mm. The spacing between the heat dissipation grooves is correspondingly reduced, further improving the heat dissipation efficiency by about 50%. The number of annular reinforcing ribs on the inner wall of the seat is increased to 2, respectively located at positions 25mm and 55mm from the top. The double annular reinforcing rib structure increases the radial stiffness of the seat by about 40%. The guide post material is changed to high-temperature resistant GCr15 bearing steel and surface nitriding treatment. The nitriding layer thickness is 0.3mm~0.5mm, and the surface hardness reaches HV850 or higher, significantly improving the wear resistance of the guide post in high-temperature environments. The number of spiral guide grooves on the outer surface of the guide post is increased from a single groove to a double groove. The grooves are arranged at 180-degree intervals around the circumference. The double-helix guide groove design makes the rotation guidance of the spring more uniform and stable during the compression process. The spring limiting ring material is changed to high-temperature resistant titanium alloy. Titanium alloy can still maintain good strength and elastic modulus at high temperatures. The taper of the tapered inner hole of the limiting ring is adjusted to 1:8, making the taper larger to accommodate the thermal expansion deformation of the spring at high temperatures. The width of the sealing groove at the threaded connection between the pressure cap and the seat body is increased to 1.5mm and the depth is increased to 2mm. A high-temperature resistant silicone rubber sealing ring is installed in the sealing groove. The silicone rubber sealing ring can maintain stable sealing performance at a high temperature of 200℃. The pressure spring seat of this embodiment is suitable for heat treatment furnaces, high-temperature forming equipment and other occasions that need to work in high-temperature environments. After continuous operation test at an ambient temperature of 180℃, no obvious thermal deformation or performance degradation was observed in any component of the device. The preload of the spring remained stable and the guiding accuracy was not affected, proving the applicability and reliability of the improved design in high-temperature environments.

[0048] The following is another specific embodiment 3 of this utility model: This embodiment is based on Embodiment 1, with enhanced design for heavy-duty working conditions. The wall thickness of the seat body is increased from the original 7.5mm to 10mm, and the outer diameter is correspondingly increased to 86mm. The height of the annular boss at the bottom of the seat body is increased to 20mm, and the wall thickness is increased to 5mm, enhancing the load-bearing capacity of the annular boss. The number of positioning protrusions on the upper surface of the annular boss is increased to 8, and the trapezoidal cross-sectional dimensions of the positioning protrusions are increased, with an upper base width of 6mm, a lower base width of 12mm, and a maximum height of 15mm. Increasing the number and size of the positioning protrusions makes... The spring bottom end gains more support points and a larger contact area, improving load distribution. The thickness of the annular reinforcing ribs on the inner wall of the seat is increased to 3mm and the height to 12mm, with a second annular reinforcing rib added 50mm from the top. This double-reinforcing rib structure significantly improves the overall rigidity and deformation resistance of the seat. The thickness of the pressure cap is increased from 25mm to 35mm, and the number of radial reinforcing ribs on the inner side of the pressure cap is increased to 12. The base width of the triangular cross-section of the reinforcing ribs is increased to 6mm and the height to 10mm, while the included angle between the reinforcing ribs is reduced to 30°, forming a denser support network. To enable the gland to withstand greater axial loads without bending deformation, the diameter of the guide post body was increased to 20mm, the diameter of the limiting shoulder at the upper end of the guide post was increased to 36mm, and the thickness was increased to 8mm. The radius of the fillet transition between the limiting shoulder and the guide post body was increased to 5mm. The increased dimensions give the limiting shoulder a larger bearing area and higher bending strength. The outer diameter of the spring limiting ring was increased to 64mm, the height to 45mm, and the wall thickness to 3mm, enhancing the structural strength and rigidity of the limiting ring. A thicker spring with a diameter of 8mm was used for the compression spring. The spring is made of steel wire with an outer diameter of 62mm, an inner diameter of 46mm, and an effective number of 7 coils. The stiffness and load-bearing capacity of the spring are significantly improved. The pressure spring seat in this embodiment is designed for heavy forging equipment, large stamping machinery, and other working conditions that require bearing large loads. When subjected to axial loads of more than 5000N, key components such as the seat body, pressure cap, and guide column did not exhibit plastic deformation or structural failure. The spring maintains stable axial movement under the precise guidance of the guide column. The entire device exhibits excellent heavy load-bearing capacity and structural reliability, meeting the high-strength requirements of heavy machinery for spring preload devices.

[0049] Specifically, the principle of this utility model is as follows: A spring mounting cavity is formed by an integrally molded annular boss at the bottom of the base, providing the spring with corresponding mounting boundaries and axial support references. A rotatable and adjustable threaded cap enables precise control of the spring compression. A guide post is fixed at the geometric center of the base bottom and passes upward through the center hole of the cap. The guide post and the inner ring of the spring form a coaxial fit. During spring compression, the guide post remains on the central axis of the spring. Through the contact and sliding between the outer surface of the guide post and the inner ring of the spring, the radial displacement of the spring is constrained to a minimum. A limiting shoulder at the upper end of the guide post prevents excessive upward compression of the spring, ensuring that the spring operates within a safe stroke range. A spring limiting ring is sleeved on the guide post and located inside the spring. The tapered inner hole structure of the limiting ring allows it to automatically adjust its contact position with the guide post according to the degree of spring compression, providing continuous radial support for the inner ring of the spring. The annular gap between the outer circumference of the limiting ring and the inner wall of the base allows the outer ring of the spring to deform freely within a certain range. This dual constraint mechanism ensures precise spring guidance. The design avoids excessive constraint on the spring. The spiral guide groove on the outer surface of the guide post guides the spring to generate a slight rotational motion during the spring compression and release process. This rotational motion can automatically eliminate the uneven force distribution between spring coils caused by manufacturing tolerances, making the stress distribution of each spring coil tend to be uniform. The radial positioning protrusions on the annular boss form multi-point contact with the bottom coil of the spring, dispersing and transmitting the axial pressure of the spring to the seat. At the same time, the gradual height design of the positioning protrusions generates a self-centering effect, automatically correcting the installation deviation of the spring. The axial heat dissipation grooves on the outer wall of the seat accelerate heat dissipation by increasing the surface area and forming convection channels. The radial reinforcing ribs on the inner side of the pressure cap form a grid support structure to convert the axial load into radial tensile stress, making full use of the tensile strength of the material. The annular reinforcing ribs on the inner wall of the seat provide circumferential stiffness to constrain the radial deformation of the seat. The sealing groove at the threaded connection, together with the sealing element, forms a sealed space to isolate the external environment. The entire device achieves multi-functional integration through optimized structural design, significantly improving the overall performance without increasing the number of parts.

Claims

1. A pressure spring seat, comprising a seat body, a pressure cap, a guide post, and a spring limiting ring; characterized in that, The base has a cylindrical structure with an annular boss at the bottom. The outer diameter of the annular boss is smaller than the outer diameter of the base, and the inner side of the annular boss forms a spring mounting cavity. The pressure cap is located at the top opening of the base and is connected to the base by threads. The pressure cap has a through hole at its center. The lower end of the guide post is fixedly connected to the geometric center of the bottom of the base. The guide post extends upward and passes through the through hole of the pressure cap. The upper end of the guide post has a limiting shoulder. The spring limiting ring is sleeved on the outer circumferential surface of the guide post and is located inside the spring mounting cavity. An annular gap is formed between the outer circumferential surface of the spring limiting ring and the inner wall of the base. The distance between the upper surface of the spring limiting ring and the inner side of the pressure cap is greater than the distance between the lower surface of the spring limiting ring and the upper surface of the annular boss.

2. A pressure spring seat according to claim 1, characterized in that, Multiple heat dissipation grooves are provided along the axial direction on the outer wall of the base. The heat dissipation grooves extend along the generatrix of the base and the depth of the heat dissipation grooves is one-third to one-half of the thickness of the base wall.

3. A pressure spring seat according to claim 2, characterized in that, The outer periphery of the gland is provided with multiple evenly distributed operating protrusions. The operating protrusions are arranged at intervals along the circumference of the gland, and the top surface of the operating protrusions has an arc-shaped protrusion structure.

4. A pressure spring seat according to claim 3, characterized in that, The outer surface of the guide post is provided with a spiral guide groove along the axial direction. The spiral helix angle of the spiral guide groove is 15°~30°, and the groove depth is one-tenth to one-eighth of the diameter of the guide post.

5. A pressure spring seat according to claim 4, characterized in that, The inner hole of the spring limiting ring has a tapered structure, and the taper of the tapered structure gradually decreases from top to bottom. The inner diameter of the upper end of the spring limiting ring is larger than that of the lower end.

6. A pressure spring seat according to claim 5, characterized in that, The upper surface of the annular boss is provided with multiple radially distributed positioning protrusions, with a number of 4 to 8 protrusions. The positioning protrusions have a trapezoidal cross-section structure, and the height of the positioning protrusions gradually decreases from the inside to the outside along the radial direction.

7. A pressure spring seat according to claim 6, characterized in that, The inner wall of the seat is provided with annular reinforcing ribs in the area of ​​the spring mounting cavity. The annular reinforcing ribs are continuously arranged along the axial direction of the seat body, and the thickness of the annular reinforcing ribs is one-fifth to one-quarter of the thickness of the seat body wall.

8. A pressure spring seat according to claim 7, characterized in that, The inner surface of the gland is provided with multiple evenly distributed radial reinforcing ribs. The radial reinforcing ribs extend radially from the center of the gland to the outer peripheral edge, and the cross-section of the radial reinforcing ribs is triangular.

9. A pressure spring seat according to claim 8, characterized in that, A sealing groove is provided at the threaded connection between the seat and the gland. The sealing groove is located at the top of the external thread of the seat and has an annular structure. The width of the sealing groove is one-half to three-quarters of the thread pitch.

10. A pressure spring seat according to claim 9, characterized in that, The limiting shoulder of the guide post has a disc-shaped structure. The diameter of the limiting shoulder is 1.5 to 2 times larger than the diameter of the main body of the guide post. The thickness of the limiting shoulder is one-quarter to one-third of the diameter of the main body of the guide post. A rounded transition area is formed between the lower surface of the limiting shoulder and the outer surface of the main body of the guide post.

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