CN116838740A - Shock absorber, front fork and bicycle - Google Patents

Shock absorber, front fork and bicycle Download PDF

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Publication number
CN116838740A
CN116838740A CN202310841888.0A CN202310841888A CN116838740A CN 116838740 A CN116838740 A CN 116838740A CN 202310841888 A CN202310841888 A CN 202310841888A CN 116838740 A CN116838740 A CN 116838740A
Authority
CN
China
Prior art keywords
piston
air chamber
inner tube
shock absorber
outer tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310841888.0A
Other languages
Chinese (zh)
Inventor
邹日
刘林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Yongdinghong Technology Co ltd
Original Assignee
Shenzhen Yongdinghong Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Yongdinghong Technology Co ltd filed Critical Shenzhen Yongdinghong Technology Co ltd
Priority to CN202310841888.0A priority Critical patent/CN116838740A/en
Publication of CN116838740A publication Critical patent/CN116838740A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/0209—Telescopic
    • F16F9/0218—Mono-tubular units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K21/00—Steering devices
    • B62K21/02—Front wheel forks or equivalent, e.g. single tine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/0209—Telescopic
    • F16F9/0281—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3214—Constructional features of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/43—Filling or drainage arrangements, e.g. for supply of gas

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The application discloses a shock absorber and a front fork and a bicycle adopting the shock absorber, the shock absorber comprises an outer tube and an inner tube, the inner tube is sealed in the outer tube in a sliding way, one end of the outer tube, which is far away from the inner tube, is fixedly connected with a piston rod, a first piston and a second piston are connected in the inner tube in a sliding way, a first air chamber is formed between the second piston and the first piston, a second air chamber is formed between the second piston and the end part of the inner tube, a limiting block for blocking the second piston from moving towards the first piston is also arranged in the inner tube, and when the air pressure of the first air chamber is larger than that of the second air chamber, the second piston moves away from the first piston direction to reduce the volume of the second air chamber. According to the application, under the condition that the initial air pressure of the first air chamber is unchanged, the volume of the air chamber of the first air chamber in the compression process can be adjusted by adjusting the initial air pressure of the second air chamber, so that the damping compression curve can be adjusted, and further the damping hardness of the bicycle can be adjusted.

Description

Shock absorber, front fork and bicycle
Technical Field
The application relates to the field of bicycles, in particular to a shock absorber, a front fork and a bicycle.
Background
In order to enable a bicycle to maintain comfortable riding experience in uneven areas such as mountain areas, damage to the structure caused by the movement of a bicycle body structure in the uneven areas is avoided, a shock absorber is required to be installed at a proper position on the bicycle, and most of riding impact force can be relieved.
At present, the shock absorber installed on the front fork is generally formed by arranging springs on two sides of the front fork for shock absorption, and the shock absorption compression curve of the front fork shock absorber can not be adjusted although the shock absorption compression curve can play a role in buffering, so that the shock absorption soft and hard requirements of different customers on a bicycle can not be met.
Disclosure of Invention
In order to overcome the defects of the prior art, the application provides the shock absorber, the front fork and the bicycle, and the shock absorption compression curve can be adjusted according to the needs, so that the requirements of different customers on the shock absorption hardness of the bicycle are met.
The application comprises the following technical scheme:
the technical scheme is as follows:
including outer tube and inner tube, sliding seal on the inner tube in the outer tube, the one end fixedly connected with piston rod of inner tube is kept away from to the outer tube, sliding connection has first piston and second piston in the inner tube, first piston and piston rod butt, form first air chamber between second piston and the first piston, form the second air chamber between second piston and the inner tube tip, first air chamber and second air chamber all are connected with the air feed air cock, still be provided with the stopper that is used for stopping second piston to remove towards first piston direction in the inner tube, works as when the atmospheric pressure of first air chamber is greater than the atmospheric pressure of second air chamber, the second piston deviates from first piston direction and removes and make second air chamber volume reduction, the volume that the second air chamber reduces is inversely proportional with the initial atmospheric pressure of second air chamber.
As a further improvement of the above technical solution, the end of the inner tube far away from the outer tube is sealed by a sealing plug, the sealing plug is provided with a connecting rod coaxial with the axis of the inner tube and extending into the inner tube, and the second piston is slidably sleeved on the connecting rod.
As a further improvement of the technical scheme, a first gas injection port communicated with the first gas chamber is arranged in the connecting rod, a second gas injection port communicated with the second gas chamber is arranged on the sealing plug, and the first gas injection port and the second gas injection port are both connected with a gas supply nozzle.
As a further improvement of the technical scheme, the limiting block is fixedly connected to the end part of the connecting rod.
As a further improvement of the technical scheme, the end part of the piston rod is provided with an arc-shaped guide surface, and the first piston is provided with an arc-shaped guide groove matched with the arc-shaped guide surface.
As a further improvement of the technical scheme, a baffle is arranged at one end of the inner tube, which is positioned in the outer tube, a avoiding hole for the piston rod to move is formed in the baffle, a spring fixing seat is arranged on the rod wall of the piston rod, which is positioned in the inner tube, a spring is arranged between the spring fixing seat and the baffle, and the spring is in a compression state when the shock absorber is in an initial state.
As a further improvement of the technical scheme, two ends of the spring are provided with a silencing pad, a silencing pipe is arranged between the spring and the piston rod, and the silencing pipe is sleeved on the piston rod.
As a further improvement of the technical scheme, a positioning block is fixedly connected to the rod wall, close to the end part of the outer tube, of the piston rod, and the positioning block is used for blocking the inner tube from moving towards the end part of the outer tube.
The second technical scheme is as follows:
a front fork comprises a stiffening beam, a shoulder cover and two damping fork legs connected to the shoulder cover and the stiffening beam, wherein the two damping fork legs comprise a damper in the first technical scheme.
The technical scheme is as follows:
a bicycle comprises a front fork in a second technical scheme.
The beneficial effects of the application are as follows: under the condition that the initial air pressure of the first air chamber is unchanged, the initial air pressure of the second air chamber is adjusted, so that the air chamber volume of the first air chamber in the compression process can be adjusted to adjust a shock absorption compression curve (the shock absorption compression curve refers to a curve of air chamber volume change during compression of a shock absorber or a curve of resistance change during compression of the shock absorber), and therefore the shock absorption hardness of a bicycle is adjusted, and further the shock absorber meets the requirements of different customers on the shock absorption hardness of the bicycle.
Drawings
The application will be further described with reference to the drawings and examples.
FIG. 1 is a schematic view of the external structure of a shock absorber according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of a shock absorber in an embodiment of the present application;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a partial enlarged view at B in FIG. 2;
FIG. 5 is an enlarged view of a portion of FIG. 2 at C;
FIG. 6 is a schematic diagram of a change in state of a shock absorber in an embodiment of the present application;
FIG. 7 is a graph showing the volume change of the first and second air cells according to an embodiment of the present application;
fig. 8 is a schematic structural view of a front fork according to an embodiment of the present application.
Reference numerals: 11. an outer tube; 111. an end cap; 112. a positioning block; 113. a buffer block; 12. an inner tube; 121. a baffle; 122. avoidance holes; 13. a piston rod; 131. an arc-shaped guide surface; 132. a spring fixing seat; 133. a spring; 134. a sound deadening pad; 135. a muffler pipe; 14. a first piston; 141. an arc-shaped guide groove; 15. a limiting block; 151. a screw; 152. a through hole; 16. a second piston; 17. a sealing plug; 171. a second gas injection port; 18. a connecting rod; 181. a first gas injection port;
v1, the volume of the first air chamber; v2, the volume of the second air chamber;
10. damping fork legs; 20. a stiffening beam; 30. a shoulder cap; 40. a standpipe; 50. and a wheel connecting seat.
Detailed Description
The conception, specific structure, and technical effects produced by the present application will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present application. It is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present application based on the embodiments of the present application. In addition, all the coupling/connection relationships referred to in the patent are not direct connection of the single-finger members, but rather, it means that a better coupling structure can be formed by adding or subtracting coupling aids depending on the specific implementation. The technical features in the application can be interactively combined on the premise of no contradiction and conflict.
Referring to fig. 1, 2 and 6, an embodiment of the present application includes a shock absorber, the shock absorber includes an outer tube 11 and an inner tube 12, the inner tube 12 is slidably sealed in the outer tube 11, an end cap 111 is fixedly installed at one end of the outer tube 11 far away from the inner tube 12, the end cap 111 is fixedly connected with a piston rod 13, the piston rod 13 extends into the inner tube 12, one end of the inner tube 12 far away from the outer tube 11 is a sealing end, a first piston 14 and a second piston 16 are slidably connected in the inner tube 12, the first piston 14 abuts against the piston rod 13, a first air chamber is formed between the second piston 16 and the first piston 14, a second air chamber is formed between the second piston 16 and the sealing end of the inner tube 12, both the first air chamber and the second air chamber are connected with an air supply nozzle, the first air chamber and the second air chamber can be inflated and deflated by the air supply nozzle, a limiting block 15 for blocking the second piston 16 from moving towards the first piston 14 is further provided in the inner tube 12, when the first air chamber is larger than the second air chamber, the second air chamber is in the opposite direction from the second air chamber 16, and the volume of the second air chamber is reduced inversely proportional to the first air chamber and the second air chamber is reduced by the volume of the second air chamber 14.
In this embodiment, gas is injected into the first air chamber and the second air chamber, the initial air pressure of the second air chamber is greater than the initial air pressure of the first air chamber (for example, the initial air pressure of the first air chamber is 200 mpa after the gas is injected), the second piston 16 is limited by the limiting block 15, when the air pressure of the second air chamber is greater than the air pressure of the first air chamber, the movement of the second piston 16 is organized, so that the volume V2 of the second air chamber is unchanged, when the damper is used, the damper is compressed after receiving an external force, the outer tube 11 and the inner tube 12 slide relatively, the piston rod 13 limits the first piston 14, so that the first air chamber is compressed, that is, the volume V1 of the first air chamber gradually becomes smaller, the air pressure gradually becomes larger, and when the external force disappears, the volume V1 of the first air chamber gradually becomes larger, the air pressure gradually becomes smaller, and the vibration is eliminated by utilizing the change of the air, so that the damping effect is achieved.
Specifically, referring to fig. 6 and 7, the reference value is set according to the limit air pressure (for example, 320 mpa) of the first air chamber compressed under the initial volume when the shock absorber is compressed by the external force, the volume V2 of the second air chamber is kept unchanged when the initial air pressure of the second air chamber is greater than the reference value, and when the initial air pressure of the second air chamber is smaller than the reference value, the first air chamber is compressed to drive the second piston 16 to move, so that the volume V2 of the second air chamber is reduced, and the volume V1 of the first air chamber is relatively increased, so that the resistance applied to the compression of the first air chamber is reduced, and compared with the former case, the shock absorbing effect of the shock absorber in the latter half when the external force is applied becomes softer. Therefore, the initial air pressure of the second air chamber can be set according to the reference value, so that the moving distance of the second piston 16 is adjusted, namely the air chamber volume of the first air chamber in the compression process is adjusted, the resistance of the second half section of the first air chamber in the compression process is adjusted, and the hardness of the shock absorber in the second half section of the shock absorber in the compression process of external force is adjusted. For example: the initial air pressure of the second air chamber is 300 megapascals, when the air pressure of the first air chamber is increased to over 300 megapascals, the second piston 16 is pushed to move, and when the air pressure of the first air chamber is continuously increased, the air pressures of the first air chamber and the second air chamber are simultaneously increased to 320 megapascals and stopped; when the initial air pressure of the second air chamber is adjusted to 280 megapascals, the second piston 16 is pushed to move after the air pressure of the first air chamber is increased to more than 280 megapascals, and when the air pressure of the first air chamber is continuously increased, the air pressures of the first air chamber and the second air chamber are simultaneously increased to 320 megapascals and stopped; thus, the distance that the second piston 16 moves at the initial air pressure of 280 mpa of the second air chamber is greater than the distance that the second piston 16 moves at the initial air pressure of 280 mpa of the second air chamber, that is, the time that the air pressure of the first air chamber reaches the limit air pressure is increased, so that the limit air pressure of the first air chamber is reduced at the same time, that is, the air resistance is reduced, and the shock absorption becomes softer. The above-mentioned air pressure value is not a measured value, and is a reference value for the purpose of facilitating understanding of the working principle, and is only used as a reference.
In this embodiment, referring to fig. 2 and 5, the sealing end of the inner tube 12 is sealed by a sealing plug 17, the sealing plug 17 is fixedly connected with the inner tube 12 in a threaded connection manner, and in order to enhance the sealing effect of the sealing plug 17 on the inner tube 12, a sealing ring is disposed on the sealing plug 17, and the sealing ring is located at one end of the sealing plug 17 located in the inner tube 12. The sealing plug 17 is provided with a connecting rod 18 extending into the inner tube 12, the second piston 16 is slidably sleeved on the connecting rod 18, and in order to improve the stability of the second piston 16 during sliding, the connecting rod 18 is coaxial with the axis of the inner tube 12, so that the second piston 16 is uniformly stressed during sliding.
In this embodiment, referring to fig. 5, a first gas injection port 181 communicating with the first gas chamber is provided in the connecting rod 18, a second gas injection port 171 communicating with the second gas chamber is provided on the sealing plug 17, and the first gas injection port 181 and the second gas injection port 171 are both connected with a gas supply air tap (the gas supply air tap structure may adopt a tire air tap, a basketball air tap, etc.). The air can be injected into the second air chamber and the first air chamber from the air supply nozzle through the external air pumping equipment, and the air pressure of the second air chamber and the air pressure of the first air chamber can be detected through the air pressure meter of the air pumping equipment, so that the air inflation quantity can be accurately controlled.
Preferably, in this embodiment, referring to fig. 5, the limiting block 15 is fixedly connected to the end of the connecting rod 18, and the size of the limiting block 15 is smaller than the inner diameter of the inner tube 12, so that the assembly is easy, and the limiting block 15 may be a circular block or a block with another shape. In addition, the limiting block 15 may be tenon-and-mortise connected to the rod wall at the end of the connecting rod 18, or may be screwed and fastened to the rod wall at the end of the connecting rod 18, so as to increase the fixing firmness of the limiting block 15, in this embodiment, the limiting block 15 is locked on the end surface of the connecting rod 18 by a screw 151, a through hole 152 is drilled on the delay axis of the screw 151, and the through hole 152 is communicated with the first gas injection port 181, thereby ensuring smooth gas filling and discharging channels of the first gas chamber.
In this embodiment, referring to fig. 4, an arc-shaped guiding surface 131 is disposed at an end of the piston rod 13, and an arc-shaped guiding groove 141 that cooperates with the arc-shaped guiding surface 131 is disposed on the first piston 14. In this embodiment, the piston rod 13 is separately disposed from the first piston 14, and the existing piston rod 13 is fixedly connected with the first piston 14, so that when the piston rod 13 is inclined, the friction forces at different contact positions between the first piston 14 and the inner tube 12 are different, which affects the use effect of the first piston 14 and may cause the piston rod 13 to break, so that the piston rod 13 is separately disposed from the first piston 14 and guided by the arc-shaped guide surface 131 and the arc-shaped guide groove 141, thereby avoiding the occurrence of the above problems.
In this embodiment, referring to fig. 4, a baffle 121 is disposed at one end of the inner tube 12 located in the outer tube 11, a avoiding hole 122 for the piston rod 13 to move is formed in the baffle 121, the diameter of the avoiding hole 122 is larger than that of the piston rod 13, a spring fixing seat 132 is fixedly connected to a rod wall of the piston rod 13 located in the inner tube 12, a spring 133 is disposed between the spring fixing seat 132 and the baffle 121, the spring 133 is sleeved on the piston rod 13, and the spring 133 is in a compressed state when the shock absorber is in an initial state. Like this, when the bumper shock absorber receives external force compression, the distance between first piston 14 and the end plate grow to spring 133 rebound, the resilience of spring 133 also can drive baffle 121 and drive inner tube 12 and remove, thereby provide an auxiliary action to the compression of first air chamber in inner tube 12, improves the shock attenuation effect, in addition, spring 133 can be compressed when first air chamber resumes, thereby prevents the quick recovery of first air chamber when external force disappears, further improves the shock attenuation effect.
In some embodiments, referring to fig. 4, two ends of the spring 133 are provided with a silencing pad 134, a silencing tube 135 is disposed between the spring 133 and the piston rod 13, the silencing tube 135 is sleeved on the piston rod 13, the silencing pad 134 and the silencing tube 135 are made of rubber, and noise generated during compression and recovery of the spring 133 can be reduced through the arrangement of the silencing pad 134 and the silencing tube 135.
In a preferred embodiment, referring to fig. 3, a positioning block 112 is fixedly connected to a rod wall of the piston rod 13 near the end of the outer tube 11, where the positioning block 112 is used to block the inner tube 12 from moving toward the end of the outer tube 11, so as to define a maximum compression space of the first air chamber, avoid the inner tube 12 from colliding with the end cap 111 of the outer tube 11, and reduce the length of the inner tube 12, and a buffer block is disposed on a side wall of the positioning block 112, so that collision force between the inner tube 12 and the positioning block 112 is reduced. Here, if the positioning block 112 is not provided, it is necessary to lengthen the length of the inner tube 12, that is, the end of the inner tube 12 contacts the end cap 111 of the outer tube 11, if the maximum compression space of the first gas chamber is kept uniform, the length of the inner tube 12 is lengthened, that is, the distance between the side of the positioning block 112 contacting the inner tube 12 and the end cap 111 of the outer tube 11 is equal to the length of the positioning block 112, so that the positioning block 112 is provided to reduce the length of the inner tube 12, which can reduce the cost.
An embodiment of the present application includes a front fork, referring to fig. 8, the front fork includes a reinforcement beam 20, a shoulder cap 30, a standpipe 40, a damper fork leg 10 and a wheel connection seat 50, the standpipe 40 is mounted and fixed on the shoulder cap 30 and the reinforcement beam 20, the wheel connection seat 50 is mounted at the bottom of the damper fork leg 10, the damper fork leg 10 is connected to the shoulder cap 30 and the reinforcement beam 20, the damper fork leg 10 includes two dampers, in this embodiment, an outer tube 11 of the damper is fixedly connected with the reinforcement beam 20 and the shoulder cap 30, and in other embodiments, an inner tube 12 of the damper is fixedly connected with the outer tube 11 of the damper and the reinforcement beam 20 and the shoulder cap 30. The front fork of the embodiment is applied with the shock absorber, and has the effect of adjusting the shock absorption hardness.
Embodiments of the present application include a bicycle comprising a frame, a front wheel, a rear wheel, and a front fork in this embodiment, wherein a standpipe 40 of the front fork is fixedly mounted to the frame, and a wheel connection seat 50 of the front fork is fixedly mounted to the front wheel, such that the shock absorber is in an inverted state, and in other embodiments, an inner tube 12 of the shock absorber is fixedly connected to a reinforcement beam 20 and a shoulder cap 30, such that the shock absorber is in a normal state, and both states do not affect the shock absorber of this embodiment being applied to the bicycle to achieve a shock absorbing effect.
The bicycle of this embodiment has applied the front fork that has the bumper shock absorber, has adjustable shock attenuation hardness effect to satisfy different bicycles and ride the people to the demand of shock attenuation hardness.
While the preferred embodiment of the present application has been described in detail, the present application is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present application, and the equivalent modifications or substitutions are included in the scope of the present application as defined in the appended claims.

Claims (10)

1. The utility model provides a bumper shock absorber, includes outer tube and inner tube, sliding seal on the inner tube in the outer tube, the one end fixedly connected with piston rod of inner tube is kept away from to the outer tube, its characterized in that: the inner tube is provided with a first piston and a second piston in a sliding connection mode, the first piston is in butt joint with the piston rod, a first air chamber is formed between the second piston and the first piston, a second air chamber is formed between the second piston and the end portion of the inner tube, the first air chamber and the second air chamber are both connected with an air supply nozzle, a limiting block used for blocking the second piston to move towards the first piston is further arranged in the inner tube, when the air pressure of the first air chamber is larger than that of the second air chamber, the second piston moves away from the first piston to enable the volume of the second air chamber to be reduced, and the reduced volume of the second air chamber is inversely proportional to the initial air pressure of the second air chamber.
2. A shock absorber according to claim 1, wherein: the one end of the inner tube far away from the outer tube is sealed through a sealing plug, a connecting rod coaxial with the axis of the inner tube and extending into the inner tube is arranged on the sealing plug, and the second piston is sleeved on the connecting rod in a sliding manner.
3. A shock absorber according to claim 2, wherein: the connecting rod is internally provided with a first gas injection port communicated with the first gas chamber, the sealing plug is provided with a second gas injection port communicated with the second gas chamber, and the first gas injection port and the second gas injection port are both connected with a gas supply nozzle.
4. A shock absorber according to claim 3, wherein: the limiting block is fixedly connected to the end portion of the connecting rod.
5. A shock absorber according to claim 1, wherein: the end part of the piston rod is provided with an arc-shaped guide surface, and the first piston is provided with an arc-shaped guide groove matched with the arc-shaped guide surface.
6. A shock absorber according to claim 5, wherein: the shock absorber is characterized in that a baffle is arranged at one end of the inner tube, which is positioned in the outer tube, a avoiding hole for the piston rod to move is formed in the baffle, a spring fixing seat is arranged on the rod wall of the piston rod, which is positioned in the inner tube, a spring is arranged between the spring fixing seat and the baffle, and the spring is in a compression state when the shock absorber is in an initial state.
7. A shock absorber according to claim 6, wherein: and two ends of the spring are respectively provided with a silencing pad, a silencing pipe is arranged between the spring and the piston rod, and the silencing pipe is sleeved on the piston rod.
8. A shock absorber according to claim 1, wherein: the positioning block is fixedly connected to the rod wall, close to the end part of the outer tube, of the piston rod and is used for blocking the inner tube from moving towards the end part of the outer tube.
9. The utility model provides a front fork, includes stiffening beam, shoulder lid and connects two shock attenuation fork legs on shoulder lid and stiffening beam, its characterized in that: both of said shock absorbing fork legs comprise a shock absorber according to claims 1-8.
10. A bicycle, characterized in that: comprising the front fork of claim 9.
CN202310841888.0A 2023-07-07 2023-07-07 Shock absorber, front fork and bicycle Pending CN116838740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310841888.0A CN116838740A (en) 2023-07-07 2023-07-07 Shock absorber, front fork and bicycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310841888.0A CN116838740A (en) 2023-07-07 2023-07-07 Shock absorber, front fork and bicycle

Publications (1)

Publication Number Publication Date
CN116838740A true CN116838740A (en) 2023-10-03

Family

ID=88166856

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310841888.0A Pending CN116838740A (en) 2023-07-07 2023-07-07 Shock absorber, front fork and bicycle

Country Status (1)

Country Link
CN (1) CN116838740A (en)

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