Inflation structure of automatic insert type shock absorber

Abstract

The utility model belongs to the technical field of automobile shock absorbers, and particularly relates to an automatic insertion piece type shock absorber inflation structure which comprises an insertion piece and a plurality of clamping blocks. The clamping block is provided with a U-shaped groove and an inflation hole communicated with the U-shaped groove. An elastic telescopic part is arranged in the U-shaped groove, one end of the elastic telescopic part is fixed to the clamping block, the other end of the elastic telescopic part is provided with a guide part, a lifting part is slidably connected to the guide part, the top face of the lifting part is located above the guide part, and an adjusting air chamber is arranged between the lifting part and the guide part; the insertion piece is positioned on one side of the lifting part close to the basic shaft; when the clamping blocks are located at the limiting positions close to the base shaft, the multiple clamping blocks are sequentially sealed and attached in the circumferential direction of the base shaft to define a sealing sleeve, and the sealing sleeve is provided with an upper round hole and a lower round hole. The timing and the stroke of the up-down reciprocating motion of the inserting piece are controlled by utilizing the change of the air pressure difference between the inflating cavity and the adjusting air chamber, so that the automatic inflating device replaces a person to insert and pull the inserting piece into and out of the shock absorber, the automatic inflating operation of the shock absorber is realized, and the inflating efficiency and the inflating quality of the shock absorber are improved.

Description

Technical Field

[0001] This utility model belongs to the field of automotive shock absorber technology, specifically relating to an automatic insert-type shock absorber inflation structure. Background Technology

[0002] Shock absorbers are crucial components of vehicle suspension systems. They utilize the flow of internal hydraulic fluid between the piston and cylinder to generate damping, absorbing and cushioning vibrations during vehicle operation, thus improving ride comfort and stability. During operation, the hydraulic fluid inside a shock absorber is prone to foaming (cavitation), leading to damping play and discontinuities, negatively impacting damping performance. To address this issue, low-pressure nitrogen is introduced into the shock absorber during production to prevent hydraulic fluid foaming and improve its damping performance.

[0003] Currently, the inflation fixtures widely used in shock absorber inflation operations generally include a sealed container and an insert. The sealed container has a connected inflation chamber and an inflation nozzle. During inflation, the insert is first manually inserted between the shock absorber piston rod and the oil seal to create an inflation channel. Then, the sealed container is placed over the outside of the shock absorber piston rod, forming a sealed inflation chamber with the shock absorber. The insert is located inside the inflation chamber, which is connected to the inflation channel. During inflation, nitrogen gas enters the inflation chamber through the inflation nozzle and finally enters the shock absorber's outlet reservoir through the inflation channel. Once the rebound force of the shock absorber piston rod reaches the preset value, the sealed container and insert are removed, completing the shock absorber inflation. For the specific structure of the inflation fixture, please refer to the inflation fixture for the shock absorber in Chinese Patent Application No. 200920308301.5, or the shock absorber inflation device in the background art of Chinese Patent Application No. 201220374287.0.

[0004] In actual production, the inserts in the aforementioned inflation fixture are manually inserted between the piston rod and the oil seal of the shock absorber. This not only wastes manpower but also results in variations in the length and volume of the inserts inserted into the shock absorber during multiple operations, leading to differences in the air capacity of the reservoirs in different shock absorbers. Even if the rebound force of the piston rods of different shock absorbers is guaranteed to be the same before inflation is complete, the amount of air in the reservoirs will not be the same. When the inserts are removed, the rebound force of the piston rods of different shock absorbers from the same batch will vary significantly, affecting not only the production quality of the shock absorbers but also the vibration damping performance of the vehicle. Furthermore, manual operation is slow and has low production efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an automatic insert-type shock absorber inflation structure to replace manual insertion and removal of inserts between the piston rod and oil seal, thereby saving manpower and improving the inflation efficiency of the shock absorber; reducing the deviation of the insertion depth of the inserts in different shock absorbers and improving the quality of the shock absorber.

[0006] The technical solution adopted by this utility model to solve the technical problem is as follows: an automatic insert-type shock absorber inflation structure, including inserts, and multiple clamping blocks evenly distributed circumferentially along a base axis perpendicular to the horizontal plane. The clamping blocks can reciprocate linearly along the radial direction of the base axis. Each clamping block has a U-shaped groove with an opening facing the base axis. An inflation hole communicating with the U-shaped groove is provided on the outer wall of any clamping block. Each U-shaped groove is provided with an elastic telescopic part that can expand and contract radially along the base axis. The end of the elastic telescopic part away from the base axis is fixed to the clamping block. The end of the elastic telescopic part near the base axis is a telescopic end and is provided with a guide part. The guide part is provided with a lifting part that slides and engages with it in the vertical direction. The top surface of the lifting part is located above the guide part, and there is an adjusting air chamber between them that compresses synchronously with the downward movement of the lifting part. The lifting part is located in the U-shaped groove and is spaced apart from the inner top wall of the clamping block. The insert is installed on the lifting part and protrudes from the side wall of the clamping block near the base axis.

[0007] When the clamping block is located at its extreme position near the base shaft, the multiple clamping blocks are sequentially sealed and fitted together along the circumference of the base shaft to form a sealing sleeve. The top surface of the sealing sleeve has an upper circular hole that runs vertically through it, and the bottom surface of the sealing sleeve has a lower circular hole that runs vertically through it. Both the upper circular hole and the lower circular hole are coaxial with the base shaft.

[0008] Furthermore, two clamping blocks are provided.

[0009] Furthermore, the elastic telescopic part includes a spring whose axis is arranged radially along the base axis. One end of the spring is connected to the bottom wall of the U-shaped groove of the clamping block, and the other end of the spring is connected to the guide part. Multiple springs are provided, and the multiple springs are evenly distributed in the vertical direction.

[0010] Furthermore, the elastic telescopic part and the guide part are connected by an adapter, the adapter including a vertical plate perpendicular to the horizontal plane and a support plate fixedly connected to the lower end of the vertical plate, the support plate being parallel to the horizontal plane; the telescopic end of the elastic telescopic part is connected to the vertical plate, and the guide part is installed above the support plate.

[0011] Furthermore, the bottom surface of the tray is in contact with the inner bottom wall of the clamping block, and the two slide in a radial fit along the base axis.

[0012] Furthermore, the guide portion includes a push rod perpendicular to the horizontal plane and a piston disposed at the upper end of the push rod; the lifting portion includes a sliding sleeve with a sealed upper end and an open lower end; the sliding sleeve is sleeved on the outside of the piston and slides axially with the piston; the piston is sealed with the inner wall of the sliding sleeve and forms the regulating air chamber with the inner wall of the sliding sleeve; the lower end of the push rod is connected to the telescopic end of the elastic telescopic portion, and the insert is mounted on the sliding sleeve.

[0013] Furthermore, the guide portion includes a sliding sleeve with a sealed lower end and an open upper end; the lifting portion includes a push rod perpendicular to the horizontal plane and a piston disposed at the lower end of the push rod; the piston is located inside the sliding sleeve and slides axially with the sliding sleeve; the piston is sealed with the inner wall of the sliding sleeve and forms the adjusting air chamber with the inner wall of the sliding sleeve; the sliding sleeve is connected to the telescopic end of the elastic telescopic portion, and the insert is mounted on the upper end of the push rod.

[0014] Furthermore, the piston and the push rod are integrally formed cylindrical structures.

[0015] Furthermore, it also includes an elastic reset member that can extend and retract in the vertical direction, with the upper end of the elastic reset member abutting against the lifting part and the lower end of the elastic reset member abutting against the guide part.

[0016] Furthermore, the elastic reset member is a reset spring disposed in the regulating air chamber, and the axis of the reset spring is arranged in the vertical direction;

[0017] The piston is provided with a guide blind hole communicating with the regulating air chamber. The sliding sleeve is provided with a guide post arranged coaxially with the guide blind hole. The guide post is located in the regulating air chamber and its axial length is less than or equal to the depth of the guide blind hole. The return spring is located in the guide blind hole and sleeved on the outside of the guide post. One end of the return spring abuts against the guide post, and the other end of the return spring abuts against the bottom wall of the guide blind hole.

[0018] Compared with the prior art, the beneficial effects of this utility model are: it provides an automatic insert-type shock absorber inflation structure, which uses the change in air pressure difference between the inflation chamber and the regulating air chamber to control the timing and stroke of the insert's reciprocating motion, thereby allowing this utility model to replace manual insertion and removal of the insert from the shock absorber, realizing automatic inflation of the shock absorber, saving manpower and improving the efficiency of shock absorber inflation; by controlling the extreme value and maintenance duration of the air pressure difference between the inflation chamber and the regulating air chamber, the pressure in the inflation chamber is the same during multiple inflation processes, thereby ensuring that the downward pressure amplitude of the regulating air chamber is the same, the downward pressure stroke of the lifting part is the same, and the depth and volume of the insert inserted into the shock absorber are the same during multiple inflation operations, reducing the deviation of the inflation volume of multiple shock absorbers and the rebound force of the piston rod, and improving the inflation quality of the shock absorber. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the air-filling end of a hydraulic cylinder;

[0020] Figure 2 This is an axial cross-sectional view of one embodiment of the inflatable structure of this utility model;

[0021] Figure 3 This is an axial cross-sectional view of another embodiment of the inflatable structure of this utility model;

[0022] Figure 4 This is a cross-sectional view of the inflatable structure of this utility model during inflation.

[0023] Figure 5 yes Figure 4 Enlarged structural diagram of section A in the middle;

[0024] Reference numerals: 1-clamping block; 11-inflation hole; 12-upper round hole; 13-lower round hole; 21-spring; 31-fixed part; 32-lifting part; 33-adjusting air chamber; 4-inflation cavity; 51-push rod; 52-piston; 53-sliding sleeve; 61-vertical plate; 62-support plate; 71-elastic reset part; 72-guide blind hole; 73-guide column; 8-insertion plate; 9-shock absorber; 91-piston rod; 92-liquid reservoir; 93-oil seal; 94-liquid reservoir. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] As attached Figure 1-5As shown, an automatic insert-type shock absorber inflation structure includes inserts 8 and a plurality of clamping blocks 1 evenly distributed circumferentially along a base axis perpendicular to the horizontal plane. The clamping blocks 1 can reciprocate linearly along the radial direction of the base axis. Each clamping block 1 has a U-shaped groove with an opening facing the base axis. An inflation hole 11 communicating with the U-shaped groove is provided on the outer wall of each clamping block 1. Each U-shaped groove contains an elastic telescopic part 2 that can extend and retract radially along the base axis. One end of the elastic telescopic part 2 away from the base axis is fixed to the clamping block 1, and the end of the elastic telescopic part 2 near the base axis is a telescopic end with a guide part 31. The guide part 31 has a lifting mechanism that slides vertically with it. The lifting part 32 has its top surface located above the guide part 31, and there is an adjusting air chamber 33 between them that compresses synchronously with the downward movement of the lifting part 32; the lifting part 32 is located in the U-shaped groove and is spaced apart from the inner top wall of the clamping block 1; the insert 8 is installed on the lifting part 32 and protrudes from the side wall of the clamping block 1 near the base shaft; when the clamping block 1 is in the extreme position near the base shaft, multiple clamping blocks 1 are sequentially sealed and fitted together along the circumference of the base shaft to form a sealing sleeve, the top surface of the sealing sleeve has an upper circular hole 12 that runs vertically through, and the bottom surface of the sealing sleeve has a lower circular hole 13 that runs vertically through, and both the upper circular hole 12 and the lower circular hole 13 are coaxial with the base shaft.

[0027] The base axis in this invention is a virtual axis designed to facilitate explanation of the structure and arrangement of the multiple clamping blocks 1, and is not a physical structure. "Multiple" in this invention refers to at least two. Generally, the clamping blocks 1 are driven to extend and retract radially along the base axis by a telescopic push rod structure. The telescopic push rod can be an electric push rod, a pneumatic push rod, or a hydraulic push rod. The inflation hole 13 on the inflation structure is connected to a nitrogen supply tank via an air pipe. A solenoid valve on the air pipe controls the connection between the inflation hole 13 and the gas tank. The upper circular hole 12 is formed by the upper sidewalls of the multiple clamping blocks 1 near the base axis, and the lower circular hole 13 is formed by the lower sidewalls of the multiple clamping blocks 1 near the base axis. The insert 8 can adopt an existing wedge-shaped structure.

[0028] Before the shock absorber is inflated, the clamping blocks 1 are positioned at their extreme positions away from the base shaft, and two adjacent clamping blocks 1 are arranged circumferentially around the base shaft. The shock absorber 9 is fixedly mounted between the clamping blocks 1, ensuring that the axis of the shock absorber 9 is coaxial and collinear with the base shaft of the inflating structure. The piston rod 91 of the shock absorber 9 is located at the upper end of the shock absorber 9, and the inserts 8 are spaced apart above the oil seal 93 between the reservoir 92 and the piston rod 91 of the shock absorber 9. The lower end faces of the clamping blocks 1 are spaced apart below the upper end face of the reservoir 92. During the shock absorber inflation, the clamping blocks 1 move linearly along the radial direction of the shock absorber 9 towards the shock absorber 9. During this process, the clamping blocks 1 first drive the inserts 8 mounted on them to abut against the side wall of the piston rod 91 of the shock absorber 9. The clamping blocks 1 continue to move along the radial direction of the shock absorber 9 towards the shock absorber 9, causing the elastic expansion part 2 to be elastically compressed by the clamping blocks 1 and the inserts 8, until all the clamping blocks 1 have moved to their extreme positions close to the axial direction of the shock absorber 9. At this time, the elastic compression part 2 generates a rebound force after being compressed, which pushes the guide part 31 and the lifting part 32 to make the insert 8 tightly abut against the piston rod 91. The insert 8 and the piston rod 91 are tightly fitted together. Multiple clamping blocks 1 form a sealing sleeve. The hole wall of the upper round hole 12 of the sealing sleeve is tightly fitted with the side wall of the piston rod 91 of the shock absorber 9, and the hole wall of the lower round hole 12 of the sealing sleeve is tightly fitted with the outer side wall of the liquid storage cylinder 92 of the shock absorber 9. The sealing sleeve, the piston rod 91 and the liquid storage cylinder 92 form a closed air chamber 4. The air chamber 4 is formed by the U-shaped grooves on multiple clamping blocks 1. The air chamber 4 is connected to the air filling hole 13. Nitrogen gas is then introduced into the inflation chamber 4 through the inflation port 13, gradually increasing the pressure inside the inflation chamber 4. When the pressure in the inflation chamber 4 exceeds the pressure in the regulating chamber 33, the gas between the top wall of the lifting part 32 and the top wall of the inner side of the clamping block 1 pushes the lifting part 32 downward and squeezes the regulating chamber 33 downward. The lifting part 32 drives the insert 8 on it to move downward synchronously, causing the insert 8 to insert between the piston rod 91 and the oil seal 93 of the shock absorber 9, opening the inflation channel. The gas in the inflation chamber 4 is then filled into the storage chamber 94 of the storage cylinder 92 through the inflation channel. After inflation is completed, inflation into the inflation chamber 4 is stopped, and the pressure inside the inflation chamber 4 gradually decreases. The regulating chamber 33 expands back, and the gas in the regulating chamber 33 pushes the lifting part 32 upward to reset. During this process, the insert 8 moves upward synchronously with the lifting part 32 and disengages from the shock absorber 9. Finally, the clamping block 1 resets, and the elastic telescopic part 2 gradually rebounds until the clamping block 1 resets, causing the insert 8 to disengage from the piston rod 91.

[0029] The inflation structure of this utility model utilizes the change in air pressure difference between the inflation chamber 4 and the regulating air chamber 33 to control the timing and stroke of the up-and-down reciprocating motion of the insert 8, thereby enabling the insert 8 to automatically insert and remove from the shock absorber 9, realizing automatic inflation of the liquid storage chamber 94 of the shock absorber 9, saving manpower and improving the efficiency of the shock absorber inflation operation; by controlling the extreme value and maintenance duration of the air pressure difference between the inflation chamber 4 and the regulating air chamber 33, the pressure in the inflation chamber 4 is the same during multiple inflation processes, thereby ensuring that the downward pressure amplitude of the regulating air chamber 33 is the same, the downward pressure stroke of the lifting part 32 is the same, and the depth and volume of the insert 8 inserted into the shock absorber 9 are the same during multiple inflation operations, reducing the deviation of the inflation volume of multiple shock absorbers 9 and the rebound force of the piston rod 91, and improving the inflation quality of the shock absorber 9.

[0030] When multiple clamping blocks 1 move radially along the base axis to their extreme positions near the shock absorber 9, they cooperate with the piston rod 91 and the liquid reservoir 92 of the shock absorber 9 to form a sealed inflation chamber 4. When multiple clamping blocks 1 move radially along the base axis to their extreme positions away from the shock absorber 9, the entire inflation structure disengages from the shock absorber 9. Two or more clamping blocks 1 can be provided. Too many clamping blocks 1 not only make the inflation structure more complex, increasing the workload and difficulty of manufacturing and assembling the entire invention, but also increase the number of seams in the sealing sleeve, increasing the risk of air leakage in the inflation chamber 4 during inflation. Preferably, two clamping blocks 1 are provided; when the clamping blocks 1 are located near the extreme positions of the base axis, the two clamping blocks 1 are arranged adjacently and sealed together to form a sealing sleeve. This structure is simple, convenient for manufacturing and assembly, reduces the number of seams in the sealing sleeve, and improves the airtightness of the inflation chamber 4. The air inlet 11 on the clamping block 1 is used to inflate the inner air chamber 4. The air inlet 11 can be set at any position on the top wall, bottom wall or side wall of the clamping block 1.

[0031] The elastic telescopic part 2 is used to generate a rebound force when compressed by the clamping block 1 and the insert 8, which pushes the guide part 31, the lifting part 32, and the insert 8, so that the insert 8 tightly abuts against the side wall of the piston rod 91, ensuring that the lower end of the insert 8 is aligned vertically with the joint between the piston rod 91 and the oil seal 93, facilitating the subsequent insertion of the insert 8 downward along the side wall of the piston rod 91 into the joint between the piston rod 91 and the oil seal 93. The elastic telescopic part 2 can be a rubber block structure made of elastic rubber such as polyurethane, natural rubber, or nitrile rubber, or it can be a steel spring structure, or a combination of the above-mentioned rubber block and spring structure. Preferably, the elastic telescopic part 2 includes a spring whose axis is arranged radially along the base axis, one end of the spring is connected to the bottom wall of the U-shaped groove of the clamping block 1, and the other end of the spring is connected to the guide part 31. Compared with the elastic rubber structure, the spring is not easy to age, has good wear resistance, has a longer service life, is easy to purchase, and has low cost. As a further preferred embodiment, the spring is provided in multiple forms, which are evenly distributed in the vertical direction to further improve the stiffness of the elastic extension part 2, reduce the degree of downward bending deformation of the spring under the gravity of the guide part 31, the lifting part 32 and the insert 8, and ensure the positional accuracy of the insert 8.

[0032] The elastic telescopic part 2 and the guide part 31 can be directly connected or connected via an adapter. Specifically, the elastic telescopic part 2 and the guide part 31 are connected via an adapter, which includes a vertical plate 61 perpendicular to the horizontal plane and a support plate 62 fixedly connected to the lower end of the vertical plate 61. The support plate 62 is parallel to the horizontal plane. The telescopic end of the elastic telescopic part 2 is connected to the vertical plate 61, and the guide part 31 is installed above the support plate 62. The support plate 62 and the inner bottom wall of the clamping block 1 can be spaced apart or connected. As a further preferred embodiment, the bottom surface of the support plate 62 is in contact with the inner bottom wall of the clamping block 1, and the two slide in a radial fit along the base axis. The inner bottom wall of the clamping block 1 provides support for the support plate 62 and the guide part 31 and other structures thereon, preventing the elastic telescopic part 2 from bending and deforming due to the gravity of the guide part 31 and other structures. This further ensures that the initial height positions of the guide part 31, the lifting part 32, and the insert 8 remain fixed, and ensures that the insert 8 is inserted into the damper 9 to the same depth.

[0033] The guide section 31 is used to mount the lifting section 32 on the telescopic end of the elastic telescopic section 2, so that the elastic telescopic section 2 drives the lifting section 32 and the insert plate to move synchronously. The lifting section 32 is used to install the insert plate 8 and drive the insert plate 8 to move synchronously up and down. The regulating air chamber 33 between the guide section 31 and the lifting section 32 is filled with gas. By controlling the air pressure difference between the regulating air chamber 33 and the external inflation chamber 4, the timing and stroke of the lifting section 33's movement are controlled, thereby achieving control over the depth of the insert plate 8 inserted into the shock absorber 9. The structure and arrangement of the guide section 31, the lifting section 32, and the regulating air chamber 33 have various embodiments, and specific embodiments are shown below:

[0034] In Embodiment 1, the guide part 31 includes a push rod 51 perpendicular to the horizontal plane and a piston 52 disposed on the upper end of the push rod 51. The lifting part 32 includes a sliding sleeve 53 with a sealed upper end and an open lower end. The sliding sleeve 53 is sleeved on the outside of the piston 52 and slides axially with the side wall of the piston 52. The piston 52 is sealed with the inner side wall of the sliding sleeve 53 and forms the regulating air chamber 33 with the inner wall of the sliding sleeve 53. The lower end of the push rod 51 is connected to the telescopic end of the elastic telescopic part 2, and the insert 8 is installed on the sliding sleeve 53. During the inflation operation, when the air pressure in the regulating air chamber 33 is less than the air pressure in the external inflation chamber 4, the gas in the inflation chamber 4 pushes the sliding sleeve 53 to drive the insert 8 to move downward synchronously. Conversely, the sliding sleeve 53 drives the insert 8 to move upward synchronously.

[0035] In embodiment 2, the guide part 31 includes a sliding sleeve 53 with a sealed lower end and an open upper end. The lifting part 32 includes a push rod 51 perpendicular to the horizontal plane and a piston 52 disposed at the lower end of the push rod 51. The piston 52 is located inside the sliding sleeve 53 and slides axially with the sliding sleeve 53. The piston 52 is sealed with the inner wall of the sliding sleeve 53 and forms the regulating air chamber 33 with the inner wall of the sliding sleeve 53. The sliding sleeve 53 is connected to the telescopic end of the elastic telescopic part 2, and the insert 8 is installed on the upper end of the push rod 51. During the inflation operation, when the air pressure in the regulating air chamber 33 is less than the air pressure in the external inflation chamber 4, the gas in the inflation chamber 4 pushes the piston 52 downward, and the piston 52 drives the push rod 51 and the insert 8 on it to move downward synchronously; conversely, the piston 52 drives the insert 8 to move upward synchronously.

[0036] To facilitate manufacturing, the piston 52 and push rod 51 in the above embodiments are generally cylindrical structures, and their diameters can be the same or different; they can be integrally formed structures or independent structures welded or bolted together. Preferably, the piston 52 and the push rod 51 are integrally formed cylindrical structures, which are simple in structure and easy to manufacture.

[0037] Preferably, it also includes an elastic reset member 71 that extends and retracts in the vertical direction. The upper end of the elastic reset member 71 abuts against the lifting part 32, and the lower end of the elastic reset member 71 abuts against the guide part 31. When the lifting part 32 presses down, it compresses the elastic reset member 71 downward, which can prevent the piston 52 and the sliding sleeve 53 from rigidly colliding. After the shock absorber 9 is inflated, the air pressure in the inflation chamber 4 gradually decreases, causing the pressure difference between the regulating air chamber 33 and the inflation chamber 4 to disappear. The elastic reset member 71 rebounds and pushes the lifting part 32 upward, causing the lifting part 32 to drive the insert 8 to quickly reset, thereby allowing the insert 8 to be quickly pulled out of the shock absorber 8, improving the extraction efficiency of the insert 8 and accelerating the inflation cycle of the shock absorber.

[0038] The elastic reset element 71 can be disposed outside or inside the regulating air chamber 33. The elastic reset element 71 can be an elastic rubber component, a spring, or a combination of both. As a further preferred embodiment, the elastic reset element 71 is a reset spring disposed within the regulating air chamber 33, with its axis arranged vertically. This not only saves installation space but also, compared to elastic rubber components, makes the spring cheaper and more readily available. Since the reset spring may bend or even fail when compressed, as a further preferred embodiment, the piston 52 has a guide blind hole 72 communicating with the regulating air chamber 33, and the sliding sleeve 53 has a guide post 73 coaxially arranged with the guide blind hole 72. The guide post 73 is located within the regulating air chamber 33, and its axial length is less than or equal to the depth of the guide blind hole 72. The reset spring is located within the guide blind hole 72 and sleeved outside the guide post 73. One end of the reset spring abuts against the guide post 73, and the other end abuts against the bottom wall of the guide blind hole 72. When the lifting part 32 is at its upper limit position, the guide post 73 is located outside the guide blind hole 72; when the lifting part 32 moves to its lower limit position, the guide post 73 is located inside the guide blind hole. The return spring and the guide blind hole 72 are generally clearance-fitted, allowing the return spring to extend and retract within the guide blind hole 72. Both the guide blind hole 72 and the guide post 73 are used to radially position the return spring and ensure that the return spring always extends and retracts along its axial direction, preventing it from bending and deforming under pressure, thus avoiding damage and scrap.

[0039] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An automatic insert shock absorber inflation structure comprising an insert (8), characterized in that: Also include the circumferential uniform distribution of multiple clamping blocks (1) along the vertical horizontal base axis, the clamping block (1) can be along the radial linear reciprocating motion of the base axis; The clamping block (1) has a U-shaped groove with an opening towards the base axis, any of the outer wall of the clamping block (1) is provided with an inflation hole (11) communicated with the U-shaped groove thereon; Any of the U-shaped groove is provided with an elastic telescopic part (2) which can be radially telescopic along the base axis, the elastic telescopic part (2) is fixed on the clamping block (1) away from the base axis, the elastic telescopic part (2) is close to the base axis one end of the telescopic end and is provided with a guide part (31) thereon, the guide part (31) is provided with a lifting part (32) which is slidably connected with the guide part (31) in the upward and downward direction, the lifting part (32) is located above the guide part (31) and has an adjusting air chamber (33) with a synchronous compression volume between the two, the adjusting air chamber (33) is compressed with the lifting part (32) downward movement; The lifting part (32) is located in the U-shaped groove and is spaced apart from the inner top wall of the clamping block (1); The insert piece (8) is installed on the lifting part (32) and protrudes from the side wall of the clamping block (1) close to the base axis side; When the clamping block (1) is located close to the limit position of the base axis, a plurality of clamping blocks (1) are sequentially sealed and fitted along the circumferential direction of the base axis to form a sealed sleeve, the top surface of the sealed sleeve has an upper circular hole (12) penetrating upward and downward, the bottom surface of the sealed sleeve has a lower circular hole (13) penetrating upward and downward, and the upper circular hole (12) and the lower circular hole (13) are coaxial with the base axis.

2. The automatic insert shock absorber inflation structure of claim 1, wherein: The clamping block (1) is provided with two.

3. The automatic insert shock absorber inflation structure of claim 2, wherein: The elastic telescopic part (2) includes a spring with an axis arranged radially along the base axis, one end of the spring is connected to the bottom wall of the U-shaped groove of the clamping block (1), and the other end of the spring is connected to the guide part (31); The spring is provided with a plurality of springs which are uniformly distributed in the upward and downward direction.

4. The automatic insert shock absorber inflation structure of claim 3, wherein: The elastic telescopic part (2) and the guide part (31) are connected through an adapter, the adapter includes a vertical plate (61) perpendicular to the horizontal plane and a supporting plate (62) fixedly connected to the lower end of the vertical plate (61), and the supporting plate (62) is parallel to the horizontal plane; The telescopic end of the elastic telescopic part (2) is connected to the vertical plate (61), and the guide part (31) is installed above the supporting plate (62).

5. The automatic insert shock absorber inflation structure of claim 4, wherein: The bottom surface of the supporting plate (62) is fitted with the inner bottom wall of the clamping block (1) and the two are slidably connected along the radial direction of the base axis.

6. The automatic insert shock absorber inflation structure of claim 1, wherein: The guide part (31) includes a push rod (51) perpendicular to the horizontal plane and a piston (52) arranged on the upper end of the push rod (51), and the lifting part (32) includes a sliding sleeve (53) with a sealed upper end and an open lower end; The sliding sleeve (53) is sleeved outside the piston (52) and is axially slidably connected with the piston (52), the piston (52) is sealingly connected with the inner wall of the sliding sleeve (53) and forms the adjusting air chamber (33) with the inner wall of the sliding sleeve (53); The lower end of the push rod (51) is connected to the telescopic end of the elastic telescopic part (2), and the insert piece (8) is installed on the sliding sleeve (53).

7. The automatic insert shock absorber inflation structure of claim 1, wherein: The guiding part (31) comprises a sliding sleeve (53) with a lower end closed and an upper end opened, and the lifting part (32) comprises a push rod (51) perpendicular to a horizontal plane and a piston (52) arranged at a lower end of the push rod (51); the piston (52) is located inside the sliding sleeve (53) and axially slides with the sliding sleeve (53), the piston (52) is in sealing cooperation with an inner wall of the sliding sleeve (53) and forms the adjusting air chamber (33) with the inner wall of the sliding sleeve (53); the sliding sleeve (53) is connected to a telescopic end of the elastic telescopic part (2), and the insert piece (8) is installed at an upper end of the push rod (51).

8. An automatic insert damper inflation structure according to claim 6 or 7, characterized in that: The piston (52) and the push rod (51) are an integrally-formed cylindrical structure.

9. An automatic insert damper inflation structure according to claim 6 or 7, characterized in that: Further comprising an elastic reset member (71) capable of stretching and contracting in an up-down direction, an upper end of the elastic reset member (71) abuts against the lifting part (32), and a lower end of the elastic reset member (71) abuts against the guiding part (31).

10. The automatic insert shock absorber inflation structure of claim 9, wherein: The elastic reset member (71) is a reset spring arranged in the adjusting air chamber (33), and an axis of the reset spring is arranged in the up-down direction. The piston (52) is provided with a guiding blind hole (72) in communication with the adjusting air chamber (33), the sliding sleeve (53) is provided with a guiding column (73) coaxially arranged with the guiding blind hole (72), the guiding column (73) is located in the adjusting air chamber (33) and its axial length is less than or equal to a hole depth of the guiding blind hole (72); the reset spring is located in the guiding blind hole (72) and is sleeved outside the guiding column (73); one end of the reset spring abuts against the guiding column (73), and the other end of the reset spring abuts against a bottom wall of the guiding blind hole (72).

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