Rail shock absorber and sealing air bag structure thereof

Abstract

The invention relates to the technical field of shock absorber equipment, in particular to a rail shock absorber and a sealing air bag structure thereof, the rail shock absorber comprises a shock absorber body, the shock absorber body comprises a working cylinder, a lifting sleeve, an oil storage cylinder arranged outside the working cylinder in a sleeving mode, a piston rod assembly and a compression valve assembly, and an oil gas cavity is formed between the working cylinder and the oil storage cylinder. A sealing air bag is connected into the oil gas cavity and comprises a middle body, annular bodies are fixedly connected to the two ends of the middle body, sealing lip structures are arranged on the sides, close to the outer wall of the working cylinder, of the annular bodies and comprise a plurality of annular protruding strips, and the sealing air bag and the sealing lip structures are made of high-molecular elastic materials. The working cylinder is automatically held tightly through the sealing lip structure to achieve gas sealing, and the annular body gradually shrinks from the end close to the middle body to the other end. And the practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorber equipment, in particular to a track shock absorber and a sealed airbag structure thereof. Background Art

[0002] At present, there is some air in the oil storage cylinder of conventional rail shock absorbers. When the second-series lateral rail shock absorber is installed horizontally on the vehicle, in the conventional design structure, air will enter the working cylinder through the bottom valve (during the working process, the oil in the oil-gas chamber of the oil storage cylinder contacts the air, which is easy to cause the emulsification of the oil. When the emulsified oil-gas mixture enters the working cylinder during the shock absorber recovery stroke, it will reduce the shock absorber damping). In order to avoid this phenomenon, a bottom valve that needs to identify the installation direction is usually designed. During the assembly process of the rail shock absorber, parts that identify the installation direction are required, and installation identification labels are pasted on the outside. When installing the rail shock absorber on the vehicle, it must also be assembled according to the installation mark. This greatly reduces the assembly efficiency of the rail shock absorber and increases the manufacturing (assembly) cost of the rail shock absorber.

[0003] A Chinese patent with patent application number CN202411578602.5 discloses an airbag shock absorber assembly with adjustable damping for adjustment. The shock absorber is detachable through a threaded connection between a sealing nut and a liquid storage cylinder. After rotating and removing the sealing nut, the connecting rod, working cylinder and other components inside the liquid storage cylinder can be removed and taken out one by one, and the inside of the shock absorber assembly can be matched and adjusted, so that the size of the shock absorber damping force can be adjusted according to the feedback data during the matching and adjustment of the whole vehicle, so that the optimal damping parameters suitable for the vehicle suspension can be determined through on-site rapid debugging and matching damping, and better performance can be obtained after adjustment, avoiding the problem that the sealing part of the shock absorber in the background technology is rolled and closed, the shock absorber cannot be disassembled and adjusted, and the sample needs to be remade for installation and adjustment, resulting in cost waste and low efficiency. The shock absorber assembly structure is easy and quick to disassemble and can be reused, which reduces costs and improves Efficiency; by sleeved the airbag subassembly on the circumference of the liquid storage cylinder and connected with the connecting rod and the liquid storage cylinder, the airbag subassembly can maintain a stable connection with the liquid storage cylinder, and the airbag subassembly can be used to support the weight of the vehicle body and assist the shock absorber in absorbing and attenuating the vibration of the vehicle body, making the ride more comfortable; the liquid storage cylinder adopts an integrated structure so that the airbag subassembly can be smoothly inserted into the body of the liquid storage cylinder from the head direction of the connecting rod, thereby realizing the normal assembly of the airbag subassembly and the shock absorber, avoiding the problem that the liquid storage cylinder of the traditional shock absorber in the background technology is sleeved with two sections of cylinder barrels and welded together, and there is a step at the welding position, which makes it impossible to insert the airbag subassembly; through the axial compression of the cone at the upper end of the guide seat and the oil seal (the axial tightening force is formed by the screwing of the sealing nut and the liquid storage cylinder), the oil seal expands radially, and is squeezed and fitted with the inner wall of the liquid storage cylinder and the connecting rod body to form an interference fit, thereby realizing radial sealing in the liquid storage cylinder, and then ensuring the normal operation of the shock absorber.

[0004] The Chinese patent application number CN202421465567.1 discloses a hydraulic shock absorber that is conducive to heat dissipation. This patent provides a heat dissipation component, an outer shell, an inner cavity, a water inlet, a drain outlet, a first bolt, a reinforcing rib and a through hole in the device. The water inlet and the drain outlet cooperate to facilitate the addition or discharge of coolant into the outer shell, which can achieve cooling and heat dissipation operations on the shock absorber, facilitate maintaining the working state and temperature state of the shock absorber, avoid damage caused by high temperature, and improve the stability of the device; the device is provided with a sealing component, a bamboo tube, a center section, a filling port, a second bolt, a mounting plate and a mounting hole. The bamboo tube is easy to install through the mounting plate and the mounting hole. The bamboo tube can be used to achieve sealing and protection operations on the telescopic end of the shock absorber, facilitate the addition of lubricating oil to the telescopic end, avoid interference and wear of dust particles on the telescopic end, and improve the stability and life of the shock absorber. However, the following problems still exist in actual applications, specifically: 1. There is air inside the conventional lateral shock absorber cylinder. The conventional design structure oil will enter the working cylinder through the compression valve, causing the shock absorber's free-range performance to deteriorate or fail; 2. During the working process, the oil in the oil storage cylinder comes into contact with the air, which easily causes the oil to emulsify, resulting in the performance of the shock absorber to decline; 3. In the known designs similar to the internal airbag, the internal air volume is determined by the shape of the airbag, and it is impossible to inflate or adjust the internal air pressure of the airbag, and it is not applicable to shock absorbers of multiple specifications; 4. In the known designs similar to the inner airbag, the ends need to be fixed with cable ties, which has a complicated process and a high leakage rate.

[0005] Therefore, the present invention provides a rail vibration damper and a sealed airbag structure thereof to solve the above problems. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a rail shock absorber and a sealed airbag structure thereof, which effectively solves the problem that when the shock absorber is used horizontally, the gas enters the working cylinder to produce lost motion, causing the shock absorber performance to decline. The gas is sealed inside the inner airbag to avoid the emulsification phenomenon caused by the contact between oil and gas, thereby improving the shock absorber performance.

[0007] The present invention includes a shock absorber body, which includes a working cylinder, a lifting sleeve, an oil storage cylinder sleeved on the outside of the working cylinder, a piston rod assembly, and a compression valve assembly. An oil-gas chamber is formed between the working cylinder and the oil storage cylinder. The invention is characterized in that a sealing airbag is connected to the oil-gas chamber, and the sealing airbag includes an intermediate body. Both ends of the intermediate body are fixedly connected with an annular body. A sealing lip structure is provided on the side of the annular body close to the outer wall of the working cylinder. The sealing lip structure includes a plurality of annular raised strips. The sealing airbag and the sealing lip structure are made of polymer elastic material. The sealing lip structure automatically holds the working cylinder to achieve sealing gas. The annular body gradually shrinks from one end close to the intermediate body to the other end.

[0008] Preferably, the wall surface of the working cylinder is provided with an air inlet chamber and an exhaust chamber at one end close to the compression valve assembly, the end of the working cylinder away from the compression valve assembly is provided with a transition chamber, and a plurality of air passages are provided inside the wall surface of the working cylinder, and the air passages realize the communication between the air inlet chamber, the transition chamber and the exhaust chamber; The wall of the oil storage cylinder is a hollow structure forming an airflow bin, and the airflow bin is fixedly connected to an air intake plate at one end close to the lifting sleeve, and a plurality of one-way air valves are fixedly connected to the air intake plate, so that the airflow enters the airflow bin from the inside of the lifting sleeve. The airflow bin is connected to the air intake chamber at one end away from the lifting sleeve through a conduit.

[0009] Preferably, a lifting piston is coaxially fixedly connected inside the lifting sleeve, and the lifting piston is located on a side of the lifting sleeve away from the working cylinder; An exhaust box is fixedly connected to one end of the oil storage cylinder away from the lifting sleeve, and the exhaust box and the exhaust chamber are connected through a conduit.

[0010] Preferably, the oil storage cylinder is fixedly connected with a guide ring bin at one end close to the compression valve assembly, the guide ring bin is in a bell-mouth shape, a ventilation bin is provided on the guide ring bin, and the ventilation bin and the exhaust chamber are connected through a conduit.

[0011] Preferably, a flow channel is opened inside the ventilation bin, and the flow channel is in a shape with a larger opening at one end and a smaller opening at the other end. The opening of the flow channel at one end close to the guide ring bin is smaller, and a spoiler blade is rotatably connected inside the flow channel. The rotation of the spoiler blade enables the airflow to flow to the side away from the compression valve assembly, thereby enhancing the fluidity of the airflow.

[0012] Preferably, the sealing airbag is provided with an inflation valve, and the inflation volume inside the sealing airbag is regulated by the inflation valve.

[0013] The present invention improves the existing oil pressure shock absorber and has the following beneficial effects: 1. A sealed airbag is arranged in the oil-gas cavity on the outer side wall of the working cylinder of the rail vehicle shock absorber, so that the sealed airbag tightly clamps the working cylinder, and the gas is stabilized by the airbag inner cavity of the sealed airbag, so that the gas cannot flow outward and cannot enter the working cylinder through the bottom valve; 2. By assembling a sealing airbag on the outer side wall of the shock absorber working cylinder, the two form a working cylinder airbag assembly. The sealing airbag is made of a polymer material with a certain toughness. The air needle can be inserted into the inflation valve of the sealing airbag to quantitatively inflate and deflate the airbag cavity, thereby adjusting the amount of gas in the sealing airbag, thereby adjusting the shape of the sealing airbag, so that the sealing airbag can be suitable for shock absorbers of different specifications, thereby achieving the purpose of improving the applicability of the sealing airbag inside the shock absorber; 3. By arranging a sealed airbag in the oil-gas cavity on the outer side wall of the working cylinder of the rail vehicle shock absorber, the sealed airbag is used to tightly clamp the working cylinder, and the gas is stabilized by the airbag inner cavity of the sealed airbag. The sealed airbag isolates the gas inside it from the oil outside it, so that the transverse rail shock absorber can achieve oil-gas separation, avoid the emulsification of oil during the working process of the rail shock absorber, and effectively improve the reliability of the rail shock absorber; 4. By setting up structures such as the air intake chamber, the exhaust chamber, the air flow chamber, the lifting piston, the guide ring chamber, the air duct and the transition chamber, the air flow inside the side walls of the working cylinder and the oil storage cylinder is effectively realized, and effective heat dissipation of the working cylinder and the oil storage cylinder is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the sealing airbag structure of the present invention.

[0016] Figure 3 It is a schematic diagram of the connection between the working cylinder and the oil storage cylinder of the present invention.

[0017] Figure 4 It is a schematic diagram of the heat dissipation structure of the working cylinder of the present invention.

[0018] Figure 5 It is a schematic diagram of the guide ring bin and its connecting parts of the present invention.

[0019] Figure 6 Schematic diagram of the sealing airbag connection structure of the present invention Figure 1 .

[0020] Figure 7 Schematic diagram of the sealing airbag connection structure of the present invention Figure 2 .

[0021] Figure numerals: 1. shock absorber body; 2. working cylinder; 3. lifting sleeve; 4. oil storage cylinder; 5. piston rod assembly; 6. compression valve assembly; 7. oil and gas chamber; 8. sealing airbag; 9. annular body; 10. sealing lip structure; 11. air intake chamber; 12. exhaust chamber; 13. transition chamber; 14. air duct; 15. air flow chamber; 16. air intake plate; 17. one-way vent valve; 18. lifting piston; 19. exhaust box; 20. guide ring chamber; 21. ventilation chamber; 22. flow channel; 23. inflation valve. DETAILED DESCRIPTION

[0022] The above and other technical contents, features and effects of the present invention are described in detail below with reference to the attached Figures 1 to 7 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0023] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0024] The present invention includes a shock absorber body 1, wherein the shock absorber body 1 includes a working cylinder 2, a lifting sleeve 3, an oil storage cylinder 4 sleeved on the outside of the working cylinder 2, a piston rod assembly 5, and a compression valve assembly 6. An oil-gas chamber 7 is formed between the working cylinder 2 and the oil storage cylinder 4. The piston rod assembly 5 slides in the working cylinder 2, and the damping effect of the shock absorber body 1 is achieved by opening and closing the compression valve assembly 6. A sealing airbag 8 is connected to the oil-gas chamber 7. The expansion and contraction of the sealing airbag 8 is used to adapt to the volume change of the oil in the working cylinder 2 and the oil storage cylinder 4, so as to avoid the volume change of the oil in the shock absorber body 1 and the sliding process of the piston rod assembly 5, thereby causing gas to appear in the working cylinder 2. The sealing airbag 8 includes an intermediate body, and both ends of the intermediate body are fixedly connected with an annular body 9. A sealing lip structure 10 is provided on one side of the annular body 9 close to the outer wall of the working cylinder 2. The sealing lip structure 10 includes a plurality of annular raised strips. The sealing airbag 8 and the sealing lip structure 10 are made of polymer elastic material. By providing a plurality of annular raised strips, the sealing performance between the sealing lip structure 10 and the working cylinder 2 is improved. The sealing lip structure 10 automatically holds the working cylinder 2 to seal the gas. The annular body 9 gradually shrinks from one end close to the intermediate body to the other end, and a certain amount of air is sealed inside the inflatable sealing airbag 8. When the piston rod assembly 5 performs a stretching movement, the oil enters the inside of the working cylinder 2 assembly through the compression valve assembly 6. Since no air enters the shock absorber, the lost travel phenomenon is avoided. At the same time, the emulsification caused by the direct contact between the air and the oil is isolated, thereby effectively improving the damping performance of the lateral shock absorber.

[0025] During the specific implementation of this embodiment, during the working process of the shock absorber, when the piston rod assembly 5 is in the compression stroke, the oil inside the working cylinder 2 assembly enters the space between the working cylinder 2 assembly and the oil storage cylinder 4 assembly through the compression valve assembly 6. At this time, the pressure in the space between the working cylinder 2 assembly and the oil storage cylinder 4 assembly increases, and the air inside the sealing airbag 8 is compressed and the volume becomes smaller. The contraction of the sealing airbag 8 is also called suction. When the piston rod assembly 5 is in the extension stroke, the oil in the space between the working cylinder 2 assembly and the oil storage cylinder 4 assembly enters the working cylinder 2 assembly through the compression valve assembly 6. The pressure in the space between the working cylinder 2 assembly and the oil storage cylinder 4 assembly decreases, and the pressure inside the sealing airbag 8 becomes smaller and the volume expands. The expansion of the sealing airbag 8 is also called exhalation. As the shock absorber works, the piston rod assembly 5 is repeatedly stretched and compressed, and the sealing airbag 8 contracts and expands accordingly, making it easier to open the compensation channel of the compression valve assembly 6 for oil exchange, thereby improving the response speed of the compression valve assembly 6.

[0026] During the operation of the shock absorber, the sliding process of the working cylinder 2 assembly will cause frictional heat generation. If the heat is not dissipated for a long time, the oil temperature will rise, and the overall service life of the shock absorber will be affected. Therefore, a structure for effectively dissipating the heat of the shock absorber is provided. Specifically, the wall surface of the working cylinder 2 is provided with an air intake chamber 11 and an exhaust chamber 12 at one end close to the compression valve assembly 6, and a transition chamber 13 is provided at one end of the working cylinder 2 away from the compression valve assembly 6. A plurality of air ducts 14 are provided inside the wall surface of the working cylinder 2. The air duct 1 The air inlet chamber 11, the transition chamber 13 and the exhaust chamber 12 are connected to each other. The gas enters through the air inlet chamber 11, and then enters the interior of the transition chamber 13 through the air passage 14 connected to the air inlet chamber 11. The airflow entering the transition chamber 13 enters the exhaust chamber 12 through the air passage 14 connected to the exhaust chamber 12, so that the gas flows in the inner wall of the working cylinder 2 assembly, thereby discharging the heat generated in the working cylinder 2 assembly and achieving the heat dissipation of the working cylinder 2 assembly.

[0027] During the operation of the shock absorber, heat will also be generated on the wall surface of the oil storage cylinder 4 assembly. In order to effectively dissipate heat for the shock absorber, the wall surface of the oil storage cylinder 4 assembly is a hollow structure to form an airflow bin 15. An air intake plate 16 is fixedly connected to one end of the airflow bin 15 close to the lifting sleeve 3. A plurality of one-way air valves 17 are fixedly connected to the air intake plate 16, so that air flows from the inside of the lifting sleeve 3 into the airflow bin 15. The end of the airflow bin 15 away from the lifting sleeve 3 is connected to the air intake chamber 11 through a conduit. The air in the airflow bin 15 flows from one side of the one-way air valve 17 to the air intake chamber 11, thereby achieving communication between the interior of the oil storage cylinder 4 assembly and the interior of the air intake bin.

[0028] A lifting piston 18 is coaxially fixedly connected to the inside of the lifting sleeve 3. The lifting piston 18 is located on the side of the lifting sleeve 3 away from the working cylinder 2. During the lifting and lowering process of the lifting sleeve 3, under the action of the lifting piston 18, the space inside the lifting sleeve 3 is compressed, and then the gas in the lifting sleeve 3 is compressed into the inside of the airflow bin 15, so that the airflow participates in the heat dissipation cycle.

[0029] The oil storage cylinder 4 is fixedly connected to an exhaust box 19 at one end away from the lifting sleeve 3. The exhaust box 19 and the exhaust chamber 12 are connected through a conduit. The gas in the exhaust chamber 12 enters the exhaust box 19 and is discharged to the outside through the exhaust box 19.

[0030] The oil storage cylinder 4 is fixedly connected with a guide ring bin 20 at one end close to the compression valve assembly 6. The guide ring bin 20 is in a trumpet shape. A ventilation bin 21 is provided on the guide ring bin 20. The ventilation bin 21 and the exhaust chamber 12 are connected by a conduit. The surrounding airflow is converged through the guide ring bin 20, so that the airflow enters the ventilation bin 21 after converging, and the airflow is accelerated, thereby ensuring that the exhaust chamber 12 is in a low-pressure state, which is convenient for the discharge of the gas in the working cylinder 2 assembly, improving the flow efficiency of the gas, and improving the heat dissipation effect.

[0031] A flow channel 22 is provided inside the ventilation bin 21, and the flow channel 22 is in a shape with a larger opening at one end and a smaller opening at the other end. The opening of the flow channel 22 close to the guide ring bin 20 is smaller, and a spoiler blade is rotatably connected inside the flow channel 22. The rotation of the spoiler blade enables the airflow to flow to the side away from the compression valve assembly 6, thereby enhancing the fluidity of the airflow and allowing the airflow to pass through the flow channel 22 faster, thereby ensuring that the flow channel 22 is in a negative pressure state, which is convenient for the outflow of gas in the working cylinder 2 assembly and the exhaust bin.

[0032] The sealed airbag 8 is provided with an inflation valve 23, through which the inflation amount inside the sealed airbag 8 is adjusted. The inflation valve 23 can be matched with a basketball inflation needle, and the sealed airbag 8 is inflated through the basketball inflation needle.

[0033] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A sealed airbag structure of a rail shock absorber, comprising a shock absorber body (1), wherein the shock absorber body (1) comprises a working cylinder (2), a lifting sleeve (3), an oil storage cylinder (4) sleeved outside the working cylinder (2), a piston rod assembly (5), and a compression valve assembly (6), wherein an oil-gas chamber (7) is formed between the working cylinder (2) and the oil storage cylinder (4), and wherein: The oil-gas chamber (7) is connected to a sealing airbag (8), the sealing airbag (8) comprises an intermediate body, both ends of the intermediate body are fixedly connected to an annular body (9), a sealing lip structure (10) is provided on the side of the annular body (9) close to the outer wall of the working cylinder (2), the sealing lip structure (10) comprises a plurality of annular raised strips, the sealing airbag (8) and the sealing lip structure (10) are made of polymer elastic material, the sealing lip structure (10) automatically holds the working cylinder (2) to achieve gas sealing, and the annular body (9) gradually shrinks from one end close to the intermediate body to the other end.

2. A rail vibration damper, characterized in that: A sealed airbag structure of a rail shock absorber according to claim 1 is used, wherein the wall surface of the working cylinder (2) is provided with an air inlet chamber (11) and an air outlet chamber (12) at one end close to the compression valve assembly (6), and the end of the working cylinder (2) away from the compression valve assembly (6) is provided with a transition chamber (13), and the wall surface of the working cylinder (2) is provided with a plurality of air passages (14), and the air passages (14) realize the communication between the air inlet chamber (11), the transition chamber (13) and the air outlet chamber (12); The wall of the oil storage cylinder (4) is a hollow structure forming an airflow bin (15). The airflow bin (15) is fixedly connected to an air intake plate (16) at one end close to the lifting sleeve (3). The air intake plate (16) is fixedly connected to a plurality of one-way vent valves (17) so that airflow enters the airflow bin (15) from the inside of the lifting sleeve (3). The airflow bin (15) is connected to the air intake chamber (11) at one end away from the lifting sleeve (3) through a conduit.

3. A rail vibration damper according to claim 2, characterized in that: A lifting piston (18) is coaxially and fixedly connected inside the lifting sleeve (3), and the lifting piston (18) is located on a side of the lifting sleeve (3) away from the working cylinder (2); An exhaust box (19) is fixedly connected to one end of the oil storage cylinder (4) away from the lifting sleeve (3), and the exhaust box (19) and the exhaust chamber (12) are connected via a conduit.

4. A rail vibration damper according to claim 3, characterized in that: The oil storage cylinder (4) is fixedly connected to one end thereof close to the compression valve assembly (6); the guide ring chamber (20) is in a bell-mouth shape; a vent chamber (21) is provided on the guide ring chamber (20); the vent chamber (21) and the exhaust chamber (12) are connected via a conduit.

5. A rail vibration damper according to claim 4, characterized in that: A flow passage (22) is provided inside the ventilation chamber (21). The flow passage (22) is in a shape with one end of the opening being larger than the other end. The opening of the flow passage (22) at one end close to the guide ring chamber (20) is smaller. A spoiler blade is rotatably connected inside the flow passage (22). The spoiler blade rotates to enable the airflow to flow toward a side away from the compression valve assembly (6), thereby enhancing the fluidity of the airflow.

6. A rail vibration damper according to claim 2, characterized in that: The sealing airbag (8) is provided with an inflation valve (23), and the inflation volume inside the sealing airbag (8) is regulated by means of the inflation valve (23).

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