TWI385094B - Adjustable bicycle seat tube oil circuit structure - Google Patents

Description

Adjustable bicycle seat tube oil passage structure

The invention relates to a seat cushion height adjusting structure, in particular to a bicycle seat tube, which is designed by using a hydraulic pressure and air pressure mixing application, so that the height of the bicycle seat cushion can be adjusted.

When purchasing a bicycle, the height of the frame must be selected according to the height of the rider. The intention is to correct the posture when riding, so as to avoid soreness and sports injuries. The height of the bicycle seat cushion is the key to whether the riding posture is correct or not. The height of the seat cushion is such that when the pedal is at the lowest point, the entire leg is straight but not tight to maintain the correct posture for riding.

The industry is not able to tailor the frame to each individual's height, and the customized production process requires considerable manufacturing costs and is not economical. Therefore, the bicycle industry generally uses a structure that adjusts the height of the seat cushion. Can solve this problem.

At present, the height adjustment structure of the seat cushion is mostly disposed in the seat tube and the seat cushion riser of the bicycle frame. According to the structure, it can be roughly classified into "mechanical", "gas-oil type", and "hybrid type", among which " "Mechanical" uses the action of certain mechanism characteristics to adjust the relative height position between the seat tube and the seat riser; the "gas-oil pressure type" is applied by using a pneumatic member or a hydraulic member, or both. The action is taken to adjust the relative height position between the seat tube and the seat tube riser; the "hybrid type" is combined with the "mechanical" and "gas-oil type" structural applications, and the actuation is used to adjust the seat tube and the seat cushion. The relative height position between the risers.

Further analysis of the seat cushion height adjustment structure of "gas-oil pressure type" mainly uses the gas compressible characteristics to match the flow of hydraulic oil in the space, so that the seat tube and the seat cushion riser are relatively positioned. The linear change causes the seat cushion mounted on the seat pan riser to achieve a height adjustment effect.

According to the "air-oil type" seat cushion height adjustment structure, the "liftable and detachable suspension seat tube structure" disclosed in the Japanese Patent No. 089221346, which comprises a locking seat and is respectively disposed on the lock a middle handle and a lower handle and a guide rod, a through hole is arranged in the center of the guide rod, and is slidably disposed by a guide rod, and one end of the guide rod passes through the central actuation hole of the locking seat, and is just abutted a return spring disposed at a front end of the guide rod and located between the handle and the lock seat; a hollow shaft tube sleeved outside the guide rod, and sleeved in the hollow shaft tube a pressure tube inside, and a piston under the guide rod and sliding in the pressure tube; the front and rear actuating rods are abutted in the movable plug, and the front and rear actuating rods are matched with a plurality of liquid pressure rings And the pressure control hole controls the actuation of the guide rod; the sleeve is sleeved on the upper end of the hollow shaft tube; a screw is inserted into the screw hole on the two sides of the head housing receiving groove; and the second adjustment block has an outer diameter Just into the hollow shaft tube, the insert on the back side is embedded in the through hole of the hollow shaft tube .

Another type of seat cushion height adjustment structure which is known as a "gas-oil type", such as the "adjustable bicycle seat cushion riser structure" disclosed in the Japanese Patent No. 097206782, which mainly comprises: a riser and a tie a pipe body of a preset length; a pipe is a pipe body which is disposed on the inner diameter of the riser and can be displaced up and down, and the upper portion is connected with a mat; a lifting adjustment group is disposed in the seat pipe The base pipe having a fixed state with the riser is a cylindrical shape with an opening upward, and an adjustment pipe is disposed therein, and an adjustment seat is disposed under the adjustment pipe and linearly displaced therefrom The adjusting seat is formed in the base pipe to form an upper liquid space and a lower liquid space, and an adjusting flow path is formed between each of the adjusting pipe and the adjusting seat to connect the upper and lower liquid spaces, and an adjusting valve stem And being disposed in the adjusting tube for up-and-down displacement, so that the adjusting flow channel is switched between flowing and non-circulating, whereby the seat tube simultaneously moves up and down and between the vertical tubes and the base tube. Action converter.

In the above structure, the former structure mainly utilizes a pressure tube in the hollow shaft tube, and the front and rear actuating rods in the pressure tube are matched with a plurality of liquid pressure rings to cause the guide rod to be forced or pressed. Therefore, the user can directly adjust the lifting and lowering with the pull handle; the latter structure is that the adjusting valve stem is disposed in the adjusting tube for up-and-down displacement, so that the adjusting flow path is switched in a state of circulation and non-circulation, thereby The seat tube simultaneously generates an action of up and down movement and rest between the riser and the base tube, thereby achieving an adjustment of the up and down displacement of the bicycle seat cushion.

Further analysis of the oil circuit structure of the two, although the former structure defines a plurality of liquid pressure rings, but does not indicate where the gas or hydraulic oil in the pressure pipe is filled, nor does it disclose the operating state of the gas or hydraulic oil; the latter structure Then, the upper and lower liquid spaces are separated by the adjusting seat area, and the adjusting valve stem can be vertically displaced to block the adjusting flow path to generate a state of circulation and non-circulation, so that the seat tube, Whether the riser and the base pipe can control the corresponding position change.

Since the hydraulic oil must flow between the two oil chambers to balance the internal pressure and flow rapidly in a short time under different pressure differences on both sides of the valve block, it is easy to generate cavitation, that is, a part of the vacuum that is not enough for the pressure chamber. The situation occurs, so that the linear motion of the height adjustment is delayed and sluggish; therefore, the inventor of the present invention believes that under the condition that the appearance dimensions of the seat tube and the seat cushion riser are constant, there is still room for improvement in the oil passage structure, and It should be limited to the application of a single "gas-oil structure", so it provides an adjustable bicycle seat tube oil circuit structure that can be applied to both "gas-oil type" and "hybrid type".

(Technical means to solve the problem)

In view of the above, the adjustable bicycle seat tube oil passage structure of the present invention comprises: an outer tube provided with a lower seat at one end thereof; and an inner tube provided with a piston seat at one end thereof And passing through the outer tube, and forming an outer air chamber together with the outer tube; a valve control device having an outer oil passage tube disposed inside the inner tube, one end of which is connected to the piston seat The other end extends toward the inner tube, and a floating piston seat is disposed on the outer tube of the oil passage, and an outer oil chamber and an inner air chamber are separated from each of the inner tube and the oil passage. The lower seat is connected with an inner tube of the oil passage extending into the outer tube of the oil passage, and a valve group is disposed at the other end of the inner tube of the oil passage, forming an inner oil chamber in the outer tube of the oil passage, and is connectable An oil passage of each of the outer oil chamber and the inner oil chamber, the valve group can open and close the communication state of the oil passage; thereby, the design of the double inner tube is used to increase the flow of the hydraulic oil to stabilize the flow In order to reduce the occurrence of cavitation in the hydraulic oil, reduce the delay of the height adjustment action, and reduce the internal components. Oil shock caused by the collision, wear and tear.

(cf. the efficacy of prior art)

The main object of the present invention is to provide an adjustable bicycle seat tube oil passage structure, which utilizes the design of the double inner tube to increase the hydraulic oil stroke to make the flow tend to be moderate and stable, thereby reducing the occurrence of cavitation of the hydraulic oil and reducing The delay of the height adjustment action occurs.

A second object of the present invention is to provide an adjustable bicycle seat tube oil passage structure, which can reduce the internal oscillation of the hydraulic oil due to excessive flow rate by increasing the design of the double inner tube structure of the hydraulic oil stroke. Reduce the impact and wear of the internal components caused by the impact of hydraulic oil, and increase the service life of the components.

A further object of the present invention is to provide an adjustable bicycle seat tube oil passage structure, which can be applied to a gas-oil pressure type seat tube, and can also be used in a mechanical and gas-oil type mixing seat tube structure. Internal, and highly practical and compatible.

First, please refer to the first to fifth figures. The adjustable bicycle seat tube oil passage structure provided by the present invention comprises: an outer tube (10) and an inner tube (20) disposed on each other. a valve control device (30) inside the inner tube (20), a clamping group (40) above the inner tube (20), and a clamping group (40) and an inner tube (20) One of the nozzle groups (50).

The outer tube (10) has a hollow tubular shape and is provided with a lower seat (11) at one end thereof; the outer tube (10) has a top seat (12) opposite to the other end of the lower seat (11). The outer edge of the outer tube (10) can be effectively closed.

The inner tube (20) has a hollow tubular shape, and is provided with a piston seat (21) at one end thereof, and the upper seat (12) is inserted into the outer tube (10) to be shared with the outer tube (10). An external air chamber (22) is formed inside.

The valve control device (30) has an oil passage outer tube (31) disposed inside the inner tube (20), one end of which is connected to the piston seat (21), and the other end is opposite the inner tube A clamping group (40) extends, and a floating piston seat (32) is disposed on the outer tube (31) of the oil passage, and the inner portion of the inner tube (20) and the outer tube (31) of the oil passage are disposed. An outer oil chamber (33) and an inner air chamber (34) are formed and linearly actuated thereon, and an oil passage extending into the outer tube (31) of the oil passage is connected to the lower seat (11). An inner tube (35); a valve block (36) is disposed at the other end of the oil pipe inner tube (35), and an inner oil chamber (37) is formed in the outer pipe (31) of the oil passage, and the inner pipe (37) is connected An oil passage (38) of the outer oil chamber (33) and the inner oil chamber (37), the valve group (36) is capable of opening and closing the communication state of the oil passage (38); each of the inner oil chambers (37) and The outer oil chamber (33) is filled with hydraulic oil, and is circulated between the inner and outer oil chambers (37) (33) via the valve group (36) opening and switching and the oil passage.

Further, the valve block (36) disclosed above has a valve seat (361) connected to the oil pipe inner tube (35), and a passage (362) is formed therein to communicate with the inner oil chamber. (37) and the oil passage (38); a control group (363) is provided between each of the lower seat (11) and the inner pipe (35) of the oil passage to provide a linear action; a valve stem (364), One end is connected to the control group (363), and the other end is inserted into the inner tube (37) of the oil passage to the valve seat (361), and the valve is linearly operated by the control group (363). The rod (364) has a switching control for opening and closing the passage (362); the valve stem (364) is located at an end portion adjacent to the valve seat (361) and has a stopper (365) by which the valve is The rod (364) is linearly displaced to block the passage (362) in a non-flowing state; the valve seat (361) is provided with a casing-like valve sleeve (366) having a through hole communicating with the inside and outside of the housing (367) The valve stem (364) is threaded into the valve sleeve (366) due to linear actuation; an elastic member (368) is disposed on the inner bottom edge of the valve sleeve (366) and the valve stem (364) Between the valve stem (364) is provided with a returning elasticity.

The clamping group (40) is disposed at the other end of the inner tube (20) relative to the piston seat (21), and provides a portion where a pad (not shown) can be connected.

The gas nozzle group (50) is disposed between each of the clamping group (40) and the inner tube (20), and one end thereof is connected to the oil passage outer tube (31) to close the inner oil chamber (37). The other end is disposed in the clamping group (40) and is connectable to the inner air chamber (34), and the inner air chamber (34) is provided to fill the gas to adjust the air pressure of the inner air chamber (34). Part.

With the above-mentioned components, the design of the double inner tube is utilized to increase the hydraulic oil stroke to make the flow tend to be moderate and stable, thereby reducing the occurrence of cavitation in the hydraulic oil, reducing the delay of the height adjustment action, and reducing the internal component receiving. Collision and wear caused by pressure oil impact can increase the service life.

In order to further understand the structural features, technical means and desired effects of the present invention, the mode of use of the present invention will be described as follows: The present invention is characterized in that the end of the inner tube (20) is provided with the piston seat (21). The outer air tube (22) is formed in the outer tube (10), and the outer air chamber (22) is formed between the lower seat (11), the inner wall of the outer tube (10), and the piston seat (21), and is filled therein. Preset pressure gas.

The oil passage outer tube (31) sleeved with the floating piston seat (32) is disposed inside the inner tube (20), and the floating piston seat (32) separates the inner tube (20) The two oil spaces, wherein the outer piston chamber (21), the inner wall of the inner tube (20), the outer wall of the oil passage outer tube (31), and the floating piston seat (32) form the outer oil chamber (33), and The hydraulic oil filled with a preset pressure; on the other side of the floating piston seat (32), the inner wall of the nozzle group (50), the inner wall of the inner tube (20), the outer wall of the oil passage outer tube (31), The inner air chamber (34) is formed between the floating piston seat (32) and filled with a predetermined pressure gas.

The valve block (36) of the present invention is disposed inside the outer pipe (31) of the oil passage, and the valve seat (36) partitions the inner portion of the outer pipe (31) into a space and a passage, wherein each The inner oil chamber (37) is formed between the valve seat (361), the inner wall of the outer oil pipe (31) and the gas nozzle group (50), and is filled with hydraulic oil of a preset pressure; 361) The oil passage (38) is formed between the valve seat (361), the inner wall of the oil passage outer tube (31), the outer wall of the oil passage inner tube (35), and the piston seat (21) on the other side, and respectively It is connected to each of the outer oil chamber (33) and the inner oil chamber (37).

The oil passage (38) path of the present invention enters the valve sleeve (366) through the through hole (367) through the inner oil chamber (37), and the stop portion (365) of the valve stem (364) is opened. In the state, the hydraulic oil flows into the valve seat (361) and enters the oil passage (38) through the passage (362), and finally communicates to the outer oil chamber (33); therefore, the hydraulic oil can be used by the inner oil chamber ( 37) Flow to the outer oil chamber (33), or the outer oil chamber (33) may be returned to the inner oil chamber (37).

In the present invention, when the height adjustment operation is to be performed, the valve stem (364) is linearly displaced toward the valve sleeve (366) by the control group (363), and the stopper portion (365) is separated from the valve seat (361). The inner surface of the flank is opened, and the oil passage (38) is in a flow state without being blocked, and the hydraulic oil can flow from the inner oil chamber (37) to the outer oil chamber (33), or from the outside When the oil chamber (33) is returned to the inner oil chamber (37), the inner tube (20) can be linearly displaced in the outer tube (10) to produce a relative position change, which can be adjusted in height.

Further, when the height has to be lowered, the inner tube (20) is moved toward the inner tube, the space in the outer air chamber (22) is reduced, and the inner oil chamber (37) is due to the valve group. (36) taking up space and gradually reducing the space, at which time the hydraulic oil in the inner oil chamber (37) begins to enter the inner oil chamber (37) through each of the oil passages (38) and the valve block (36). The outer oil chamber (33), therefore, when the pressure of the outer oil chamber (33) increases, the floating piston seat (32) begins to move toward the inner air chamber (34).

When the height is to be raised, the inner tube (20) is stretched outwardly toward the outer tube (10), the space in the outer air chamber (22) is increased, and the inner oil chamber (37) is The valve block (36) is moved away from the space and gradually increases in space. At this time, since the pressure of the inner oil chamber (37) becomes small, the hydraulic oil starts to pass from the outer oil chamber (33) through each of the oil passages (38). And the valve block (36) enters the inner oil chamber (37), so when the pressure of the outer oil chamber (33) is reduced, the floating piston seat (32) starts to move toward the outer air chamber (22).

When the height adjustment is to be positioned, the valve stem (364) is linearly displaced in the opposite direction of the valve sleeve (366) by the control group (363), and the stopping portion (365) abuts against the valve seat (361). The inner surface of the rim is not opened. At this time, the oil passage (38) is blocked, and the hydraulic oil is unable to flow, so that the inner and outer oil chambers (37) and (33) are inside. The outer air chamber (34) (22) is in a pressure balanced state, and the inner tube (20) cannot be positioned linearly displaced in the outer tube (10).

The invention has a double inner tube design, and an oil outer tube (31) is mainly disposed inside the inner tube (20), and the valve group (36) is disposed in the outer tube (31) of the oil passage and simultaneously forms the valve The technical characteristics of the inner oil chamber (37) serve as two uses, one of which is to open and close the communication state of the oil passage (38), and the other is to increase the communication between the inner and outer oil chambers (37) (33). The oil passage (38) stroke; forming an internal flow chamber (37) and an oil passage (38) simultaneously with a considerable length of the outer tube (31) of the oil passage to form an indirect flow with partial barrier effect Therefore, when the hydraulic oil has to flow through the relatively narrow distance and the oil passage (38) to the inner and outer oil chambers (37) (33), the natural flow rate is slow and the pressure change is relatively stable, which is not easy. The phenomenon of cavitation is generated, and the inner tube (20) is delayed and viscous and cannot be moved, so that the benefit of the height adjustment action can be effectively improved.

On the other hand, by designing the double inner tube structure for increasing the stroke of the hydraulic oil, it is meant that an outer oil pipe (31) is disposed inside the inner pipe (20), and the outer pipe (31) is disposed in the outer pipe (31). The valve block (36) and the technical characteristics of the inner oil chamber (37) simultaneously reduce the internal oscillation of the hydraulic oil due to the excessive flow rate, so as to reduce the collision and wear of the internal components caused by the impact of the hydraulic oil. Increase the service life of components.

The nozzle set (50) of the present invention is mainly provided to provide a filling gas into the inner air chamber (34), thereby achieving the effect of adjusting the internal air pressure of the inner air chamber (34).

The floating piston seat (32) of the present invention is designed to provide an "automatic" pressure adjustment function for both the outer oil chamber (34) and the inner air chamber (34) on both sides, and on the other hand Both sides of the gas or hydraulic oil have the effect of reducing the internal oscillation of the fluid when the pressure difference changes, and provide a voltage stabilization effect in a timely manner.

The elastic member (368) of the valve block (36) of the present invention is designed such that when the valve stem (364) is displaced toward the valve sleeve (366), the control group (363) is released from the valve stem (364). When the force is applied, the elastic member (367) provides a natural elastic force to reset the valve stem (364) until the stopping portion (365) abuts against the end edge of the valve seat (361) to make the oil passage (38) ) is not in circulation.

Please refer to the ninth to twelfth drawings, which are another embodiment of the present invention, wherein the oil passage outer tube (31) is integrally formed with a closed shape with respect to the other end of the piston seat (21); The valve control device (30) further has an elastic member (39) disposed in the inner air chamber (34) and abutting on one end of the floating piston seat (32) to provide a linear reset action. The pressure between the inner air chamber (34) and the outer oil chamber (33) on both sides of the floating piston seat (32) is balanced.

In this embodiment, the elastic force of the elastic member (39) is used instead of the preset air pressure of the inner air chamber (34), which is a hybrid application of the "mechanical" and "gas-oil" structures; In the embodiment, the use of the nozzle group (50) may be omitted, and the air pressure addition operation may not be required due to insufficient air pressure of the inner air chamber (34).

Meanwhile, in this embodiment, the oil passage outer tube (31) can be formed in an integral closed shape at one end, which ensures that the hydraulic oil of the inner oil chamber (37) is not exposed; the assembly of the embodiment , the actuating relationship, and the expected effect, are exactly the same as the best embodiment.

Referring to the thirteenth to fifteenth drawings, in another embodiment of the present invention, the elastic member (368) is disposed inside the valve sleeve (366), and the two ends thereof are respectively abutted on the respective ones. Between the valve seat (361) and the stem of the valve stem (364), the valve stem (364) is provided with a returning elastic force; the stopping portion (365) is disposed at a middle portion of the valve stem (364) adjacent to the valve seat ( The runner exit portion of 361), and the linear displacement of the valve stem (364) can synchronously drive the stop portion (365) to move, so that the flow passage in the valve seat (361) is in a flowing or non-circulating state. Switch.

The actuation direction of this embodiment is opposite to that of the preferred embodiment. When the height adjustment operation is to be performed, the valve stem (364) is linearly displaced toward the valve seat (361) by the control group (363). The stopping portion (365) enters the valve seat (641) from the edge of the valve seat (361) to open the inner flow passage thereof, and the oil passage (38) is in a flow state without being blocked. The oil can flow from the inner oil chamber (37) to the outer oil chamber (33), or from the outer oil chamber (33) to the inner oil chamber (37), the inner tube (20) can be externally The tube (10) is linearly displaced to produce a relative position change, which can be adjusted in height.

When the height adjustment is to be positioned, the valve stem (364) is linearly displaced in the opposite direction of the valve seat (361) by the control group (363), or the control group (363) is released from the valve stem (364). Applying force, the elastic member (368) provides a natural elastic force to reset the valve stem (364) to the stop portion (365) to block the flow passage of the valve seat (361), and the oil passage (at this time) 38) is in a non-circulating state, and the hydraulic oil cannot flow so that the inner and outer oil chambers (37) (33) and the inner and outer air chambers (34) (22) are in a pressure-balanced state. 20) It is impossible to position the linear displacement in the outer tube (10).

The assembly, actuation relationship, and expected performance of this embodiment are identical to the preferred embodiment.

In summary, the "adjustable bicycle seat tube oil passage structure" disclosed in the present invention provides a seat tube structure that can be applied to "gas oil pressure type" and "mechanical and gas oil pressure type". The design of the double inner tube increases the stroke of the oil passage, and at the same time, can control the opening and closing of the valve group, thereby reducing the phenomenon of cavitation generated by the hydraulic oil, reducing the occurrence of the delay of the height adjustment action, and reducing the flow rate of the hydraulic oil due to excessive flow rate. The internal oscillation and internal components are affected by the impact of hydraulic oil, causing collision and wear, increasing the service life of the components, and achieving a highly practical bicycle seat tube height adjustment structure, so that the overall industry is practical and cost-effective. And its structure has not been seen in the publications or public use, in line with the requirements of the invention patent application, please ask the Bureau to understand the patent, as soon as possible to grant patents, to pray.

It is to be understood that the above is a specific embodiment of the present invention and the technical principles applied thereto, and the functional effects produced by the concept of the present invention are still beyond the spirit of the specification and drawings. In the meantime, it should be combined with Chen Ming within the scope of the present invention.

[this invention]

(10). . . Outer tube

(11). . . Lower seat

(12). . . Sitting

(20). . . Inner tube

(twenty one). . . Piston seat

(twenty two). . . External air chamber

(30). . . Valve control device

(31). . . Oil pipeline

(32). . . Floating piston seat

(33). . . External oil room

(34). . . Internal air chamber

(35). . . Oil pipeline inner tube

(36). . . Valve block

(361). . . Seat

(362). . . path

(363). . . Control group

(364). . . Valve stem

(365). . . Stop

(366). . . Valve sleeve

(367). . . Through hole

(368). . . Elastic part

(37). . . Internal oil room

(38). . . Oil road

(39). . . Elastic part

(40). . . Clamping group

(50). . . Gas nozzle group

The first figure is a perspective view of a preferred embodiment of the present invention.

The second figure is an exploded perspective view of a preferred embodiment of the present invention.

The third figure is a perspective exploded view of a valve block in accordance with a preferred embodiment of the present invention.

The fourth figure is a schematic diagram of a set of a preferred embodiment of the present invention.

Figure 5 is a partially enlarged schematic view showing the assembly of a preferred embodiment of the present invention.

Figure 6 is a schematic diagram showing the state of use of a preferred embodiment of the present invention.

Figure 7 is an enlarged schematic view showing a state of use of a preferred embodiment of the present invention.

The eighth figure is a schematic diagram of the second state of use according to a preferred embodiment of the present invention.

Figure 9 is a perspective exploded view of another embodiment of the present invention.

Figure 11 is a schematic diagram showing the assembly of another embodiment of the present invention.

Figure 11 is a partially enlarged schematic view showing the assembly of another embodiment of the present invention.

Figure 12 is a schematic view showing the state of use of another embodiment of the present invention.

Figure 13 is a schematic view showing the assembly of still another embodiment of the present invention.

Fig. 14 is a partially enlarged schematic view showing the assembly of still another embodiment of the present invention.

Fig. 15 is a schematic view showing the state of use of still another embodiment of the present invention.

(10). . . Outer tube

(20). . . Inner tube

(twenty one). . . Piston seat

(twenty two). . . External air chamber

(31). . . Oil pipeline

(32). . . Floating piston seat

(33). . . External oil room

(34). . . Internal air chamber

(37). . . Internal oil room

(38). . . Oil road

(50). . . Gas nozzle group

Claims (11)

An adjustable bicycle seat tube oil passage structure comprises: an outer tube which is hollow tubular, and is provided with a lower seat capable of closing one end thereof; an inner tube having a hollow tubular shape and one of which can be closed at one end thereof a piston seat is disposed in the outer tube, and an outer air chamber is formed inside the outer tube, the other end of the inner tube is provided with a clamping group; and a valve control device is disposed inside the inner tube An outer oil pipe is connected to the piston seat at one end, and the other end extends toward the clamping group, and a floating piston seat is disposed on the outer casing of the oil pipe, and the inner pipe and the oil passage are Between the outer tubes, an outer oil chamber and an inner air chamber are formed and linearly actuated thereon, and an inner tube of the oil passage extending into the outer tube of the oil passage is connected to the lower seat, and The valve end of the oil pipe is provided with a valve block, and an oil chamber is formed in the outer pipe of the oil pipe, and an oil circuit connecting one of the outer oil chamber and the inner oil chamber is connected, and the valve group can be opened and closed. The connected state of the oil passage. The adjustable bicycle seat tube oil passage structure according to claim 1, wherein the valve group has a valve seat connected to the inner tube of the oil passage, and a passage is formed therein to connect the inner oil a control unit is disposed between each of the lower seat and the inner tube of the oil passage to provide a linear action; a valve stem having one end connected to the control group and the other end extending through the oil passage The inner tube is connected to the valve seat, and by the linear action of the control group, the valve stem has switching control for opening and closing the passage. The adjustable bicycle seat tube oil passage structure according to claim 2, wherein a valve sleeve is arranged above the valve seat, and has a through hole communicating with the inner and outer portions of the housing; the valve stem is linear The actuator is inserted into the valve sleeve; an elastic member is disposed between the inner bottom edge of the valve sleeve and the valve stem to provide a return elastic force of the valve stem. The adjustable bicycle seat tube oil passage structure according to claim 2, wherein a valve sleeve is arranged above the valve seat, and has a through hole communicating with the inner and outer portions of the housing; the valve stem is linear The actuator is inserted into the valve sleeve; an elastic member is disposed inside the valve sleeve, and two ends of the valve sleeve are respectively abutted between the valve seat and the valve stem to provide a return elastic force of the valve stem. The adjustable bicycle seat tube oil passage structure according to claim 2, wherein the valve stem has a stopper portion, and the passage block is blocked from flowing in a non-circulating state by linear displacement of the valve stem. The adjustable bicycle seat tube oil passage structure according to claim 1, wherein each of the inner oil chamber and the outer oil chamber is filled with hydraulic oil, and the switch is opened and the oil passage is connected through the valve group, and It can be circulated between each of the inner and outer oil chambers. The adjustable bicycle seat tube oil passage structure according to claim 1, wherein the outer tube has a top seat relative to the other end of the lower seat, which can effectively close the outer tube end edge and allow the inner tube to pass through Stretch it up. The adjustable bicycle seat tube oil passage structure according to claim 1, wherein each of the clamping group and the inner tube is provided with a nozzle group communicating with the inner air chamber, and the inner air chamber is filled. The gas is used to adjust the pressure of the inner air chamber. The adjustable bicycle seat tube oil passage structure according to claim 8 , wherein one end of the gas nozzle assembly is connected with the oil passage outer tube to close the inner oil chamber; the other end of the gas nozzle group is worn. Located in the clamping group. The adjustable bicycle seat tube oil passage structure according to claim 1, wherein the oil passage outer tube is integrally formed with a closed shape with respect to the other end of the piston seat. The adjustable bicycle seat tube oil passage structure according to claim 1, wherein the valve control device further has an elastic member disposed in the inner air chamber and abutting one end thereof on the floating piston seat Providing a linear resetting action to balance the pressure between the inner and outer oil chambers on both sides of the floating piston seat.