CN113619720A

CN113619720A - Full-pneumatic shock-absorbing front fork

Info

Publication number: CN113619720A
Application number: CN202010372215.1A
Authority: CN
Inventors: 朱国一
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-11-09

Abstract

The invention discloses a full-air-pressure type shock absorbing front fork, which comprises a fixing ring, an outer cylinder body, a piston ejector rod, an upper sealing cover, a piston ejector rod, a buffering pressure spring and a buffering cushion, wherein an air inflating valve device is correspondingly arranged at the top end of the fixing ring of the outer cylinder body, the piston ejector rod is arranged at the tail end of the outer cylinder body, the piston is sleeved with the buffering cushion through the piston ejector rod, the buffering pressure spring is arranged at the bottom of the piston ejector rod, pistons with through holes are respectively arranged between the inner tube and the outer tube, a leakage-stopping oil seal is correspondingly arranged outside the piston and is arranged below the piston, a variable compression air chamber is arranged between the outer cylinder body and the piston, a positioning space is correspondingly arranged among the outer cylinder body, the piston and the piston ejector rod, and the buffering pressure spring is arranged inside the positioning space. This full vapour-pressure type falls fork shock attenuation front fork has and provides can simplify structure, the good, durable advantage of gas tightness, has solved current shock attenuation front fork structure complicacy, and the gas tightness is not good, leads to the problem that the durability is low.

Description

Full-pneumatic shock-absorbing front fork

Technical Field

The invention relates to the technical field of shock-absorbing front forks, in particular to a full-air-pressure shock-absorbing front fork.

Background

The existing inverted fork type front fork is characterized in that two opposite sides of a front wheel are respectively provided with a hollow front fork tube which can longitudinally stretch and retract, the bottom end of the hollow front fork tube is provided with two opposite tail ends of the axle center of the front wheel, the top end of the front fork tube is provided with a shoulder cover which is connected with the top end of the front fork tube to enable the front fork tube to be parallel and limited, and a vertical tube which can be interlocked by an operating handle and can be arranged on a main frame in a penetrating way around the axis of the vertical tube is connected above the shoulder cover.

The front fork tubes are hollow, so that devices such as a shock absorbing spring, hydraulic damping and the like can be installed in an inner space, and the inner tube and the outer tube which can linearly slide along the longitudinal direction can achieve the purpose of buffering the shock of running on a bumpy road surface to increase the riding comfort, however, the structure of the inverted fork type front fork is complex, and the number of the components is large, so that the improvement is needed in practice, for example: the new national patent M280340 is directed to an improvement of a front fork suspension structure of a vehicle.

In view of the above-mentioned problems of the conventional inverted fork shock absorbing front fork, the present invention is a new type of air pressure inverted fork shock absorbing front fork, and therefore the main objective of the present invention is: provides a full-pneumatic type inverted fork shock-absorbing front fork with simplified structure, good air tightness and durability.

Disclosure of Invention

The invention aims to provide a full-air-pressure type shock-absorbing front fork, which has the advantages of simplified structure, good air tightness and durability and solves the problem of low durability caused by complicated structure and poor air tightness of the existing shock-absorbing front fork.

In order to achieve the purpose, the invention provides the following technical scheme: a full-air-pressure type shock-absorbing front fork comprises a fixed ring, an air cylinder outer body, a piston mandril, an upper sealing cover, a piston, the piston mandril, a buffer pressure spring and a buffer pad, two groups of air cylinder outer bodies and two groups of piston mandrils are correspondingly arranged, the top ends of the fixing rings of the air cylinder outer bodies are correspondingly connected with the upper sealing covers and internally provided with inflating nozzle devices, the tail end of the cylinder outer body is provided with a piston mandril, the piston is sleeved with the cushion pad through the piston mandril, the bottom of the piston mandril is provided with a buffer pressure spring, pistons with through holes are respectively arranged between the inner tube and the outer tube, the outer part of each piston is correspondingly provided with a leakage-proof oil seal, and the leakage-stopping oil seal is arranged below the piston, a variable compression air chamber is arranged between the cylinder outer body and the piston, and a positioning space is correspondingly arranged among the cylinder outer body, the piston and the piston ejector rod, and a buffering pressure spring is arranged in the positioning space.

Further, the piston comprises a piston A and a piston B, an oil seal ring is arranged inside the piston, a lower hole groove is formed in the lower portion of the piston, and a piston gas seal ring is arranged inside the lower hole groove.

Furthermore, a pull rod is sleeved at the top end of the upper sealing cover and connected with the cushion pad through a guide groove in the middle of the piston, and a pressure spring is arranged between the piston and the cushion pad.

Compared with the prior art, the invention has the following beneficial effects:

1. the novel air cylinder is characterized in that a fixing ring body is provided with a connecting hole, an air cylinder outer body is respectively connected to the back of the connecting hole of the fixing ring body, piston mandrils are respectively sleeved on a cushion pad at the tail end of a connecting pipe, pistons with through holes are respectively arranged between each air cylinder outer body and the piston mandrils, at least three piston air sealing rings are respectively arranged between the outsides of the air cylinder outer bodies and the piston mandrils, and the air cylinder outer bodies and the piston mandrils can relatively move to form a pair of variable compression air chambers; the lower sealing covers are respectively sleeved at the bottom ends of the cylinder outer bodies and filled with high-pressure gas by the variable compression gas chamber，And use the compression rate thereof to replace the spring，The full-pneumatic shock-absorbing front fork has the shock-absorbing and damping effects.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic diagram of the fixing ring, the cylinder outer body, the piston rod, the inflating nozzle, the upper sealing cover, the piston rod, the buffering pressure spring and the buffering cushion.

Fig. 3 is a schematic view of the piston structure of the present invention.

In the figure: 1. a fixing ring; 2. an outer cylinder body; 3. a piston ejector rod; 4. an upper sealing cover; 5. a piston; 51. a piston at side A; 52. a piston at side B; 53. an oil seal ring; 54. a lower hole groove; 55. a piston seal gas ring; 6. positioning a space; 7. buffering a pressure spring; 8. a cushion pad; 9. an air valve device; 10. a leakage-proof oil seal; 11. a variable compressed air chamber; 12. a pull rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a full-air-pressure type shock absorbing front fork includes a fixing ring 1, an outer cylinder body 2, a piston rod 3, an upper sealing cover 4, a piston 5, a buffering compression spring 7 and a buffering cushion 8, wherein the outer cylinder body 2 and the piston rod 3 are correspondingly arranged in two groups, the top end of the fixing ring of the outer cylinder body 2 is correspondingly connected with the upper sealing cover 4 and is internally provided with a gas nozzle device 9, the fixing ring 1 is arranged at the top of the outer cylinder body 2 corresponding to the gas nozzle device 9, the end of the outer cylinder body 2 is provided with the piston rod 3, the piston 5 is sleeved with the buffering cushion 8 through the piston rod 3, the bottom of the piston rod 3 is provided with the buffering compression spring 7, the piston 5 is arranged inside the outer cylinder body 2, the outer part of the piston 5 is correspondingly provided with a leakage-stopping oil seal 10, the leakage-stopping oil seal 10 is arranged below the piston 5, and a variable compression air chamber 11 is arranged between the outer cylinder body 2 and the piston 5, and a positioning space 6 is correspondingly arranged among the cylinder outer body 2, the piston 5 and the piston mandril 3, and the buffer pressure spring 7 is arranged in the positioning space 6.

Specifically, the piston 5 comprises an a-side piston 51 and a B-side piston 52, an oil seal ring 53 is arranged inside the piston 5, a lower hole groove 54 is arranged at the lower part of the piston 5, and a piston gas seal ring 55 is arranged inside the lower hole groove 54.

Specifically, a pull rod 12 is sleeved at the top end of the upper sealing cover 4, and the pull rod 12 is connected with the cushion pad 8 through a piston middle guide groove.

When the full-air-pressure type shock-absorbing front fork is used, the variable compression air chamber 11 is filled with high-pressure gas, such as nitrogen, the high-pressure gas is used for expanding the cylinder outer body 2 and the piston ejector rod 3, the piston 5 of the piston ejector rod 3 is compressed and abuts against the buffering pressure spring 7 in the positioning space 6, and the high-pressure gas has a specific compression ratio to replace a traditional spring, so that the full-air-pressure type shock-absorbing front fork has a shock-absorbing and damping effect; install this novel full vapour-pressure type shock attenuation front fork in the front fork of this locomotive vehicle front wheel, when this locomotive vehicle traveles in the top slope highway section, the reaction force in the twinkling of an eye on the road surface can be exerted in locomotive vehicle front wheel, and this front wheel is at the application of force in this novel cylinder external body 2, and piston ejector pin 3 and its piston 5 can contract and compress this variable compression towards this cylinder external body 2 internalWhen the high pressure gas in the air chamber 11 is compressed, the high pressure gas is away from the buffer compression spring 7 in the positioning space 6, and the high pressure gas simultaneously accumulates a recovery elasticity, when the instant reaction force disappears, the recovery elasticity of the high pressure gas is applied to the piston post rod 3, the piston post rod 3 is extended, the piston 5 presses the buffer compression spring 7, and the front wheel of the motorcycle is recovered to the initial position，This is repeated cyclically to provide a comfortable ride of the scooter.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a full vapour-pressure type suspension fork, includes solid fixed ring (1), the cylinder ectosome (2), piston ejector pin (3), goes up closing cap (4), piston (5), buffering pressure spring (7) and cushion (8), the cylinder ectosome (2) and piston ejector pin (3) correspondence are provided with two sets ofly, its characterized in that: the air cylinder is characterized in that a fixed ring top end of the air cylinder outer body (2) is correspondingly connected with an upper sealing cover (4) and internally provided with an inflating valve device (9), the fixed ring (1) is correspondingly arranged at the top of the air cylinder outer body (2) corresponding to the inflating valve device (9), a piston ejector rod (3) is arranged at the tail end of the air cylinder outer body (2), a piston (5) is sleeved with a cushion pad (8) through the piston ejector rod (3), a buffer pressure spring (7) is arranged at the bottom of the piston ejector rod (3), the piston (5) is arranged inside the air cylinder outer body (2), a leakage-stopping oil seal (10) is correspondingly arranged outside the piston (5), the leakage-stopping oil seal (10) is arranged below the piston (5), a variable compression air chamber (11) is arranged between the air cylinder outer body (2) and the piston (5), and a positioning space (6) is correspondingly arranged among the air cylinder outer body (2), the piston (5) and the piston ejector rod (3), the buffer compression spring (7) is arranged in the positioning space (6).

2. The all-pneumatic suspension fork of claim 1, wherein: the piston (5) comprises an A-side piston (51) and a B-side piston (52), an oil seal ring (53) is arranged inside the piston (5), a lower hole groove (54) is formed in the lower portion of the piston (5), and a piston seal gas ring (55) is arranged inside the lower hole groove (54).

3. The all-pneumatic suspension fork of claim 1, wherein: the top end of the upper sealing cover (4) is sleeved with a pull rod (12), the pull rod (12) is connected with the cushion pad (8) through a piston middle guide groove, and a pressure spring (13) is arranged between the piston (5) and the cushion pad (8).