Opposed bowl piston gas supply device

Abstract

The utility model provides a kind of opposed leather cup piston type gas supply device, it is related to the technical field of automobile suspension, and it includes: piston, leather cup, leather cup compression ring, air inlet valve piece, connecting rod, piston pin, piston pin bushing, press pin and guide ring, piston front end is equipped with leather cup, leather cup front end is equipped with leather cup compression ring, leather cup compression ring front end is equipped with air inlet valve piece, press pin is located air inlet valve piece front end, and press pin is fixedly connected with piston, connecting rod front end is equipped with shaft hole, piston pin bushing is installed in shaft hole with interference, piston pin passes through piston pin bushing, piston pin is connected with piston with interference, guide ring is fixedly connected on the outside of piston, by setting connecting rod and piston pin hinged and connecting rod can be along piston pin axial floating structure, and the head of press pin and air inlet valve piece are spaced, solve the piston axial eccentricity caused by cam when gas supply device reciprocates and the uneven contact and friction between cylinder inner wall, further lead to the technical problem of eccentric wear.

Description

Technical Field

[0001] This utility model relates to the field of automotive suspension technology, specifically to a opposed cup piston-type air supply device. Background Technology

[0002] Among numerous mechanical devices, the piston assembly is a crucial component. However, currently available piston assemblies exhibit some significant drawbacks in practical applications:

[0003] The concentricity of the air supply device and the cylinder is difficult to guarantee, leading to uneven wear. During the operation of a piston assembly, precise concentric alignment between the air supply device and the cylinder is the primary prerequisite for ensuring its efficient and stable operation. However, existing products often fail to achieve this. Due to limitations in manufacturing processes, accumulated errors during assembly, and the combined effects of wear and deformation of components after long-term use, the concentricity of the air supply device and the cylinder is easily disrupted. Once concentricity deviates, the air supply device will experience uneven contact and friction with the cylinder wall during reciprocating motion, leading to uneven wear, which can result in cylinder leakage or the gas pressure inside the cylinder failing to meet design standards, causing cylinder failure.

[0004] In existing devices, the sealing cup is subjected to excessive lateral forces during operation. This means that while the cup is subjected to gas pressure, it is also subjected to additional forces from other directions. Excessive lateral forces on the sealing cup can cause deformation, compromising its original sealing shape and performance. Over time, the sealing effect of the sealing cup gradually decreases, significantly increasing the risk of gas leakage.

[0005] Currently, the shape and size of the pressure plate in similar products are not well-matched with the layout of the air inlet. During installation, the pressure plate can easily block the air inlet due to improper operation or unreasonable structural design. Once the air inlet is blocked, the gas supply to the cylinder will be hindered, making it impossible to guarantee the normal flow of gas and timely pressure build-up within the cylinder. This will cause the piston device to fail to quickly reach the required working pressure during the initial startup, affecting the equipment's response speed and working efficiency.

[0006] Currently, in the assembly process of similar products, the pressure cap is placed directly above the piston, and the piston cup ring is installed to the piston by welding or gluing. This installation method makes it impossible to accurately control the overall installation height, resulting in errors in the height of the piston connecting rod assembly. During the installation of the piston connecting rod assembly, the overall height of the piston cylinder needs to be adjusted, which increases the adjustment process during assembly.

[0007] Therefore, there is an urgent need to develop an opposed-chamber piston-type air supply device to solve the above problems. Utility Model Content

[0008] This utility model is a counter-chamber piston-type air supply device. It features a structure in which the connecting rod is hinged to the piston pin and the connecting rod can float along the piston pin axis. It also includes structural improvements such as increasing the air inlet, which solve the above-mentioned technical problems.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a counter-chamber piston-type air supply device, comprising: a piston, a chamber, a chamber pressure ring, an intake valve plate, a connecting rod, a piston pin, a piston pin bushing, a pressure pin, and a guide ring. The piston has a chamber at its front end, a chamber pressure ring at its front end, an intake valve plate at its front end, and a pressure pin located at the front end of the intake valve plate, which is fixedly connected to the piston. The connecting rod has a shaft hole at its front end, and a piston pin bushing is interference-fitted into the shaft hole. The piston pin passes through the piston pin bushing and is interference-fitted to the piston. The guide ring is fixedly connected to the outside of the piston.

[0010] Preferably, the piston has an air inlet at the top, the air inlets are evenly distributed, the piston has a piston center hole at the top, the piston has symmetrical piston circular holes in the middle, and annular limiting blocks are provided at the upper and lower ends of the piston circular holes.

[0011] Preferably, the cup is an annular, outwardly enlarging through-hole structure, and a cup base is provided below the cup. The inner diameter of the cup base corresponds to the top diameter of the piston, the outer diameter of the cup base is smaller than the diameter of the limiting block, and the top diameter of the cup is larger than the diameter of the limiting block. The cup pressure ring is sleeved on the piston above the cup base, and the cup pressure ring is fixedly connected to the piston. The upper surface of the cup pressure ring is on the same plane as the upper surface of the piston.

[0012] Preferably, the diameter of the intake valve plate corresponds to the inner diameter of the pressure cup ring, the intake valve plate has a valve plate center hole at its center, the pressure pin passes through the valve plate center hole and is bolted to the piston center hole at the top of the piston, the head of the pressure pin is spaced apart from the intake valve plate, and the intake valve plate moves along the axial direction of the pressure pin.

[0013] Preferably, the connecting rod has a small end at its front end, which is an annular structure. The center of the small end has a shaft hole, the piston pin bushing is interference-fitted with the shaft hole, the piston pin passes through the piston pin bushing and is symmetrically arranged, and the connecting rod can move along the piston pin axial direction.

[0014] Preferably, the middle part of the connecting rod has a tapered structure, the tail of the connecting rod is provided with a large end, the large end of the connecting rod is provided with an inward groove, one side of the inward groove is a connecting thick wall, the connecting thick wall is provided with a retaining spring groove on the outer side, the other side of the inward groove is a connecting thin wall, the connecting thin wall is provided with an arc-shaped notch.

[0015] Preferably, the length of the piston pin is less than the outer diameter of the piston, and the piston and connecting rod are connected by a piston pin joint.

[0016] Preferably, the guide ring adopts a non-closed annular structure, the guide ring has an axially broken portion, the guide ring is fixed between two annular limiting blocks, and the width of the guide ring corresponds to the distance between the two annular limiting blocks.

[0017] Beneficial effects

[0018] This utility model provides an opposed leather cup piston-type air supply device, which has the following advantages compared with the existing technology:

[0019] This invention features a connecting rod hinged to the piston pin, with the connecting rod capable of floating axially along the piston pin. This allows the piston to move slightly along the piston pin axis. When the cam drives the connecting rod in reciprocating motion, if assembly errors cause the cam position to be too high or too low, the slight piston movement will automatically compensate for the deviation, ensuring that the piston axis remains dynamically aligned with the cylinder wall. This mechanism eliminates the problem of uneven wear caused by insufficient forced alignment.

[0020] By adding a guide ring at the piston tail, the guide ring structure directly contacts the cylinder inner wall and actively bears the radial load generated by the eccentric motion of the cam. The piston cup only needs to perform the sealing task under low lateral force environment, avoiding unilateral compression deformation and wear of the lip. Through the interference fit between the piston cup and the piston, the height of the connecting rod assembly after installation is uniformly limited, eliminating the process of further adjusting the piston cylinder during installation and improving production efficiency.

[0021] By setting the head of the pressure pin at an interval with the air intake valve plate, the air intake port moves with the piston. The piston and air intake port are designed as an integral unit, eliminating the risk of air intake blockage caused by the installation position deviation of the traditional pressure plate. At the same time, this utility model increases the diameter of the air intake port, increases the effective air intake volume, and meets the high flow rate air supply requirements. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a cross-sectional view of the present invention;

[0025] Figure 3This is a schematic diagram of the piston structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the piston front end installation state of this utility model;

[0027] Figure 5 This is a schematic diagram of the connecting rod structure of this utility model;

[0028] Figure 6 This is a cross-sectional view of the present invention in use;

[0029] In the picture:

[0030] 1. Piston; 101. Inlet port; 102. Piston center bore; 103. Piston round bore; 104. Annular limiting block.

[0031] 2. Leather cup, 3. Leather cup pressure ring, 4. Intake valve plate,

[0032] 5. Connecting rod; 501. Small end of connecting rod; 502. Shaft hole; 503. Large end of connecting rod; 504. Inward groove; 505. Thick-walled connecting part; 506. Thin-walled connecting part; 507. Snap ring groove.

[0033] 6. Piston pin, 7. Piston pin bushing, 8. Press pin, 9. Guide ring, 10. Cylinder, 11. Sealing ring, 12. Plug, 13. Exhaust check valve, 14. Cam, 15. Motor, 16. Snap ring, 17. Bearing. Detailed Implementation

[0034] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. The technical solutions of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0035] Please see Figure 1-6 This utility model provides a technical solution:

[0036] A counter-chamber 2 and piston 1 type air supply device, used in conjunction with cylinder 10, includes: piston 1, chamber 2, chamber pressure ring 3, intake valve plate 4, connecting rod 5, piston pin 6, piston pin bushing 7, pressure pin 8, and guide ring 9. The piston 1 is provided with a chamber 2 at its front end, the chamber 2 is provided with a chamber pressure ring 3 at its front end, and the chamber pressure ring 3 is provided with an intake valve plate 4 at its front end. The intake valve plate 4 allows low-pressure air to enter but prevents high-pressure air from being discharged. The pressure pin 8 is provided at the front end of the intake valve plate 4 and limits the axial movement of the intake valve plate 4. The pressure pin 8 is bolted and fixed to the piston 1. The connecting rod 5 is provided with a shaft hole 502 at its front end. The piston pin bushing 7 is interference-fitted into the shaft hole 502 and serves as a lubricant. The piston pin 6 passes through the piston pin bushing 7 and connects the connecting rod 5 and the piston 1. The piston pin 6 is interference-fitted and fixed to the piston 1. The guide ring 9 is snapped and fixed to the outside of the piston 1.

[0037] In some embodiments, the piston 1 is provided with an air inlet 101 at the top. The air inlets 101 are evenly distributed and enlarged to increase the air intake. The air inlets 101 are integrated with the piston 1 to reduce air intake obstruction during the air intake process. The piston 1 is provided with a piston center hole 102 at the top for fixing the pressure pin 8. The piston 1 is provided with symmetrical piston circular holes 103 in the middle. The piston pin 6 passes through the piston circular holes 103 and is press-fitted with the piston 1. The piston circular holes 103 are provided with annular limiting blocks 104 at the upper and lower ends. The two annular limiting blocks limit the position of the guide ring 9. The piston circular holes 103 and their lower ends form the piston 1 skirt to prevent the piston 1 from bearing too much lateral force and to prevent accelerated wear.

[0038] In some embodiments, the cup 2 is an annular enlarged through-hole structure. When the piston 1 is installed in the cylinder 10, the outer diameter of the cup 2 corresponds to the inner diameter of the piston 1 hole in the cylinder 10. A cup base is provided below the cup 2. The inner diameter of the cup base corresponds to the top diameter of the piston 1. The outer diameter of the cup base is smaller than the diameter of the limiting block, and the top diameter of the cup 2 is larger than the diameter of the limiting block. During the movement of the piston 1, the cup 2 continuously maintains airtightness with the piston 1 hole in the cylinder 10. The cup pressure ring 3 is sleeved on the piston 1 above the cup 2 base. The cup pressure ring 3 is fixedly connected to the piston 1. The upper surface of the cup pressure ring 3 is on the same plane as the upper surface of the piston 1.

[0039] In some embodiments, the diameter of the intake valve plate 4 corresponds to the inner diameter of the cup ring 3. The intake valve plate 4 has a valve plate center hole at its center position. The pressure pin 8 passes through the valve plate center hole and is bolted to the piston center hole 102 at the top of the piston 1. The head of the pressure pin 8 is spaced apart from the intake valve plate 4. The intake valve plate 4 moves axially along the pressure pin 8. The intake valve plate 4 is opened and closed by the movement of the piston 1. When the piston 1 retracts inward in the piston 1 hole of the cylinder 10, the air pressure in the cylinder 10 is greater than the air pressure in the piston 1 hole, and the intake valve plate 4 opens. When the piston 1 pushes the piston outward in the piston 1 hole of the cylinder 10, the air pressure in the piston 1 hole is greater than the air pressure in the cylinder 10, and the intake valve plate 4 closes.

[0040] In some embodiments, the front end of the connecting rod 5 is provided with a small end 501, and the center of the small end 501 is provided with a shaft hole 502. The piston pin bushing 7 is interference-fitted with the shaft hole 502. The piston pin 6 is symmetrically arranged after passing through the piston pin bushing 7. The connecting rod 5 can move axially in the piston pin 6. The movement of the connecting rod 5 in the axial direction of the piston pin 6 can offset the cam being installed too high or too low, ensuring that the piston 1 and the cylinder 10 are coaxial and do not produce uneven wear.

[0041] The middle part of the connecting rod 5 is a tapered structure. The tail of the connecting rod 5 is provided with a connecting rod big end 503. The connecting rod big end 503 is provided with an inward groove 504. One side of the inward groove 504 is a connecting thick wall 505. The connecting thick wall 505 is provided with a retaining spring groove 507 on the outer side. The retaining spring groove 507 is used to fix and engage the retaining spring 16. The other side of the inward groove 504 is a connecting thin wall 506. The connecting thin wall 506 is provided with an arc-shaped notch.

[0042] In some embodiments, the length of the piston pin 6 is less than the outer diameter of the piston 1, and the piston 1 and the connecting rod 5 are hinged together by the piston pin 6.

[0043] In some embodiments, the guide ring 9 adopts a non-closed annular structure, the guide ring 9 has a circumferentially broken portion, the guide ring 9 is fixed between two annular limiting blocks 104, the width of the guide ring 9 corresponds to the distance between the two annular limiting blocks 104, the guide ring 9 and the skirt at the lower part of the piston 1 bear part of the lateral force of the piston 1 contacting the cylinder 10 during the movement of the piston 1, and reduce the frictional force between the piston cup 2 and the cylinder 10.

[0044] Example 1

[0045] In this invention, the piston pin bushing 7 is interference-fitted onto the connecting rod 5, the piston cup 2 is installed on the piston 1, and the piston cup 2 is fixed to the piston 1 using the piston cup pressure ring 3. The intake valve plate 4 is placed on the head of the piston 1, so that the center hole of the intake valve plate 4 corresponds to the center hole 102 of the piston. The pressure pin 8 passes through the intake valve plate 4 and is pressed into the piston 1, and bolted to the piston center hole 102. There is a certain distance between the head of the pressure pin 8 and the intake valve plate 4, so that the intake valve plate 4 can move along the axis of the pressure pin 8. The piston 1 with the accessories installed is aligned with the connecting rod 5 with the piston pin bushing 7 installed. The piston pin 6 is passed through the piston hole 103 and the piston pin bushing 7 in sequence. After installation, the connecting rod 5 rotates without jamming, and the piston 1 can move slightly in the direction of the piston pin 6 axis. The large end 503 of the piston 1 connecting rod is movably engaged with the cam 14, so that the connecting rod 5 and the cam 14 are connected. The cam 14 is then installed on the motor 15.

[0046] Install cylinder 10 inside valve plate, pass the assembled connecting rod 5 through cylinder 10, install the large end 503 of connecting rod on bearing 17, install snap ring 16 in snap ring groove 507 of large end 503 of connecting rod, install sealing ring 11 in sealing groove of cylinder 10 to achieve cylinder sealing, bolt exhaust one-way valve 13 to cylinder 10 and fix it, and press plug 12 in place.

[0047] During operation, the coaxiality of piston 1 and cylinder 10 will not be affected by assembly errors. When cam 14 is installed too high or too low, connecting rod 5 will move on piston pin 6 to ensure that piston 1 and cylinder 10 are coaxial and do not produce uneven wear. When motor 15 drives cam 14 to rotate, cam 14 drives connecting rod 5 to reciprocate. Piston 1 always moves along the axis of cylinder 10. Connecting rod 5 swings between cam 14 and piston 1. Guide ring 9 prevents piston 1 from jamming when moving up and down and bears part of the lateral force. When piston 1 rises, it will not excessively wear the piston cup 2. During the compression process, when connecting rod 5 moves downward, low-pressure air enters cylinder 10 from the bottom of piston 1 through the intake port, opening intake valve plate 4. The intake port was enlarged during the design process, increasing the intake volume. Exhaust check valve 13 is closed because the external air pressure is higher than the internal air pressure. When connecting rod 5 moves upward, intake valve plate 4 is pressed closed by air pressure. At this time, exhaust check valve 13 opens, completing the compression.

[0048] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. For those skilled in the art to which the present invention pertains, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered as falling within the scope of patent protection determined by the submitted claims.

Claims

1. A piston-type air supply device with opposing leather cups, characterized in that: include: The piston comprises a piston cup, a piston cup pressure ring, an intake valve plate, a connecting rod, a piston pin, a piston pin bushing, a pressure pin, and a guide ring. The piston has a piston cup at its front end, a piston cup pressure ring at its front end, an intake valve plate at its front end of the piston cup pressure ring, and a pressure pin located at the front end of the intake valve plate, which is fixedly connected to the piston. The connecting rod has a shaft hole at its front end, in which a piston pin bushing is interference-fitted. The piston pin passes through the piston pin bushing and is interference-fitted to the piston. The guide ring is fixedly connected to the outside of the piston.

2. The opposed-chamber piston-type air supply device according to claim 1, characterized in that: The piston has an air inlet at the top, which is evenly distributed. The piston also has a central hole at the top and symmetrical circular holes in the middle. Annular limiting blocks are provided at the upper and lower ends of the circular holes.

3. The opposed-chamber piston-type air supply device according to claim 2, characterized in that: The leather cup has an outwardly enlarging through-hole structure. A leather cup base is provided below the leather cup. The inner diameter of the leather cup base corresponds to the top diameter of the piston. The outer diameter of the leather cup base is smaller than the diameter of the limiting block. The top diameter of the leather cup is larger than the diameter of the limiting block. The leather cup pressure ring is sleeved on the piston above the leather cup base. The leather cup pressure ring is fixedly connected to the piston. The upper surface of the leather cup pressure ring is on the same plane as the upper surface of the piston.

4. The opposed-chamber piston-type air supply device according to claim 2, characterized in that: The diameter of the intake valve plate corresponds to the inner diameter of the pressure cup ring. The intake valve plate has a valve plate center hole at its center position. The pressure pin passes through the valve plate center hole and is bolted to the piston center hole at the top of the piston. The head of the pressure pin is spaced apart from the intake valve plate. The intake valve plate moves along the axial direction of the pressure pin.

5. The opposed-chamber piston-type air supply device according to claim 1, characterized in that: The connecting rod has a small end at its front end, which is an annular structure. The center of the small end has a shaft hole. The piston pin bushing is interference-fitted with the shaft hole. The piston pin passes through the piston pin bushing and is symmetrically arranged. The connecting rod can move along the piston pin axial direction.

6. The opposed-chamber piston-type air supply device according to claim 5, characterized in that: The middle part of the connecting rod has a tapered structure, and the tail of the connecting rod is provided with a large end. The large end of the connecting rod is provided with an inward groove. One side of the inward groove is a connecting thick wall, and the connecting thick wall is provided with a retaining spring groove on the outer side. The other side of the inward groove is a connecting thin wall, and the connecting thin wall is provided with an arc-shaped notch.

7. The opposed-chamber piston-type air supply device according to claim 1, characterized in that: The length of the piston pin is less than the outer diameter of the piston, and the piston and connecting rod are connected by a piston pin joint.

8. The opposed-chamber piston-type air supply device according to claim 2, characterized in that: The guide ring adopts a non-closed annular structure, the guide ring has an axially broken part, the guide ring is fixed between two annular limiting blocks, and the width of the guide ring corresponds to the distance between the two annular limiting blocks.

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