CN211139504U - Bicycle seat tube structure - Google Patents

Abstract

The utility model discloses a bicycle seat tubular construction, the seat pipe includes and is hollow outer tube, be equipped with axial extension's first recess on the internal periphery of outer tube, the cover is equipped with the inner tube in this outer tube, the outer peripheral edges of inner tube be equipped with axial extension and with the corresponding second recess of first recess, be equipped with the locating part in the common spacing space that forms of first recess and this second recess, this locating part includes the body and compels the piece, through fixing the locating part between first recess and this second recess, can avoid inner tube and outer tube to produce relative rotation, and utilize the material characteristic of compeling the piece, can eliminate the clearance because of the matched stack tolerance produces.

Description

Bicycle seat tube structure

Technical Field

The present invention relates to a seat tube structure for a bicycle, and more particularly to a seat tube structure for a bicycle that provides rotational position limitation and can fill up the problem of assembly tolerance between members in a position-limited structure.

Background

In order to match the height of each rider, the seat tube of the bicycle generally has the function of adjusting the height, so that the riders can have more comfortable riding experience.

The seat pipe of connection saddle influences comfort level, stability and the most direct structure that is correlated with of degree of safety when riding, if the height adjustment of seat pipe itself is wrong, the effect of moving away to avoid possible earthquakes is not good, the stability is not good, can influence the posture and the muscle application of force that the rider ridden when riding, makes it more hard, leads to the motion injury even. The seat tube capable of adjusting the height is matched with the shock-absorbing function, the inner tube which is assembled in the seat tube and used for adjusting the height is easy to rotate due to the up-and-down reciprocating linear movement, so that the cushion shakes, the pedaling efficiency of a rider on the bicycle is influenced, and the riding safety is also influenced, therefore, the rotation limiting structures are conveniently arranged in the seat tube and the lifting tube in the industry, and the inner tube cannot rotate when moving axially up and down.

For example, taiwan 104213450 patent discloses a "rotation device of a bicycle seat", in which an anti-rotation rod is connected to one side of a bicycle seat and is inserted into a seat tube of a bicycle body in a manner of being restricted to be disengaged; the anti-rotation rod body is formed by integrally forming a joint for mounting a bicycle seat on the top end of an air pressure rod, the air pressure rod is provided with a cylinder body and a rod piece arranged in the cylinder body, a first anti-rotation body which is formed by extrusion and has a non-perfect-circle peripheral outline is arranged at a set part of the cylinder body, an end cover is arranged between the joint and the first anti-rotation body, and a dustproof sleeve is sleeved between the end cover and the cylinder body.

As described above, since the rotation limiting device is mostly disposed between the seat tube and the inner tube, it is easy to be assembled, there is a small tolerance gap between the components, and when the seat tube and the inner tube linearly move for a long time and wear, the connection portion between the seat tube and the inner tube and the rotation limiting related components is easy to generate a gap, such a gap set by the assembly tolerance or a gap generated by long-term wear will cause a situation of shaking when the seat tube and the inner tube linearly move, which causes problems of misalignment of lifting and adjusting, poor stepping efficiency, and affecting safety.

Therefore, how to eliminate the gap generated at the connecting position of the related elements for rotation limitation is the problem to be solved by the present invention.

SUMMERY OF THE UTILITY MODEL

The main objective of the present invention is to provide a bicycle seat tube that can adjust the lifting and lowering mechanism and the rotation shaking situation, and the limit structure has poor efficiency due to the assembly tolerance.

To achieve the above object, the present invention relates to a bicycle seat tube structure, which comprises: the inner circumference of the outer pipe is provided with at least one first groove which extends axially; the inner pipe is sleeved on the outer pipe and can axially move relative to the outer pipe, and the outer periphery of the inner pipe is provided with at least one second groove which axially extends; at least one limiting piece, which comprises a body and a packing piece; the driving structure is arranged in the outer pipe and penetrates through the inner pipe and is used for driving the inner pipe to switch between an axial moving state and a positioning state relative to the outer pipe; the first groove and the second groove are arranged oppositely, and the limiting piece is accommodated in a limiting space formed by the first groove and the second groove.

Optionally, the first groove length extends along an axial length of the inner periphery of the outer tube.

Optionally, the first groove length extends along an axial length of the inner periphery of the outer tube.

Optionally, the length of the second groove is equal to the length of the limiting member, and the limiting member is accommodated in the second groove.

Optionally, the body of the position limiter is made of a metal material.

Optionally, the urging member of the stopper is made of an elastic material.

Optionally, the packing member of the limiting member is wrapped around at least a portion of the body.

Optionally, the body has a first diameter section and a second diameter section, and the first diameter length of the first diameter section is smaller than the second diameter length of the second diameter section.

Optionally, the packing member of the limiting member is wrapped at the first diameter section of the body, so that a third diameter length formed after the body is combined with the packing member is greater than or equal to a second diameter length of the second diameter section.

Therefore, the utility model has the advantages of, through first recess and this locating part of this second recess holding, can produce rotatory spacing, avoid this seat pipe unstable structure because of height adjustment, produce rotatory the rocking, and compel spare on this locating part can utilize the characteristic of elasticity material, effectively fill the clearance that produces because of the assembly tolerance between first recess, locating part, this second recess three, make the bicycle travel during rider can be more comfortable, the footboard trample more laborsaving more efficient.

Drawings

FIG. 1 is a perspective view of a bicycle seat tube structure according to the present invention;

FIG. 2 is an exploded view of the bicycle seat tube structure of the present invention;

FIG. 3A is a schematic view of a limiting member of the bicycle seat tube structure of the present invention;

FIG. 3B is a cross-sectional view of the limiting member of the bicycle seat tube structure of the present invention;

FIG. 4 is a schematic view of the limiting member of the bicycle seat tube structure according to the present invention;

FIG. 5 is a cross-sectional view of a first embodiment of a limiting member of the bicycle seat tube structure according to the present invention;

fig. 6 is a cross-sectional view of a second embodiment of the limiting member of the bicycle seat tube structure of the present invention.

In the figure:

100: a seat tube; 110: an outer tube; 111: a first groove; 120: an inner tube; 121: a second groove; 121 a: a first end; 121 b: a second end; 130: a drive structure; 131: an actuating device; 132: a drive wheel; 133: a control line; 200: a limiting member; 210: a limiting space; 201: a body; 201 a: a first diameter section; 201 b: a second diameter section; 202: a packing member; r1: a first diameter; r2: a second diameter; r3: a third diameter.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Please refer to fig. 1 to 6. The utility model relates to a bicycle seat pipe 100, seat pipe 100 contains: an outer tube 110, an inner tube 120, and a driving structure 130, wherein the inner tube 120 is movably disposed in the outer tube 110, the outer tube 110 is fixed to a bicycle frame (not shown), the driving structure 130 is connected to the outer tube 110, and the driving structure 130 is connected to a bicycle control device (not shown). When the user controls the bicycle control device to adjust the driving structure 130, the driving structure 130 controls the inner tube 120 to move axially relative to the outer tube 110, so as to achieve the purpose of adjusting the height of the seat tube.

In order to prevent the inner tube 120 and the outer tube 110 of the seat tube 100 from shaking during relative axial movement, the seat tube 100 forms a limiting structure by at least one first groove 111 disposed on the outer tube 110, at least one second groove 121 disposed on the inner tube 120, and at least one limiting member 200. The first groove 111 is disposed on an inner circumference of the outer tube 110 and extends axially along the inner circumference of the outer tube 110. The second groove 121 is disposed at an outer circumference of the inner tube 120, extends axially along the outer circumference of the inner tube 120, and is disposed corresponding to the first groove 111. The position-limiting member 200 is received in a position-limiting space 210 formed by the first groove 111 and the second groove 121.

The position-limiting member 200 is a rod and includes a body 201 and a tightening member 202. The body 201 can be made of a metal material, the packing member 202 can be made of an elastic material, and the packing member 202 is wrapped outside the body 201. The body 201 may be made of copper, aluminum, stainless steel or other metal alloy, and the tightening member 202 may be made of rubber, super rubber or other composite material with elasticity. More specifically, referring to fig. 3A and 3B, the body 201 includes a first diameter section 201a and a second diameter section 201B, a length of a first diameter R1 of the first diameter section 201a is smaller than a length of a second diameter R2 of the second diameter section 201B, and the packing member 202 is wrapped outside the first diameter section 201a, such that a length of a third diameter R3 formed after the combination of the limiting member 200 and the packing member 202 is greater than or equal to the length of the second diameter R2 of the second diameter section 201B.

In the present embodiment, the limiting structure includes three limiting members 200, and therefore, three sets of the first grooves 111 and three sets of the second grooves 121 for accommodating the limiting members 200 are provided. The length of the first groove 111 extends along the length of the inner circumference of the outer tube 110, and can be integrally formed with the outer tube 110; the length of the second groove 121 is matched with that of the limiting member 200, and the second groove 121 and the inner tube 120 are integrally formed; one part of the limiting member 200 is accommodated in the first groove 111, and the other part is accommodated in the second groove 121. In more detail, the second groove 121 has a first end 121a and a second end 121b, and the position-limiting member 200 can selectively abut against the first end 121a or the second end 121b of the second groove 121. When the inner tube 120 is pushed by the driving structure 130 to move axially upward, the limiting member 200 abuts against the second end 121b of the second groove 121b and moves axially upward along with the inner tube 120 in the first groove 111; when the inner tube 120 moves axially downward, the stopper 200 abuts against the first end 121a of the second groove 121 and moves axially downward along with the inner tube 120 in the first groove 111. Because the limiting member 200 is covered with the elastic pressing member 202, the pressing member 202 can assist the limiting member 200 to fill the gap between the first groove 111 and the second groove 121, so as to prevent the inner tube 110 and the outer tube 120 from rotating relatively.

The driving structure 130 includes an actuating device 131 and a driving wheel 132, one end of the driving wheel 132 is connected to the actuating device 131, and the other end is connected to a bicycle control device (not shown) via a control wire 133, and the actuating device 131 is disposed in the outer tube 110 and partially disposed in the inner tube 120. In this embodiment, the actuator 131 may be a pneumatic, hydraulic or hybrid fluid control device to change the fluid pressure between the inner tube 120 and the outer tube 110 to axially move the inner tube 120 relative to the outer tube 110.

When it is desired to adjust the height of the saddle, the bicycle control device is operated to pull the control wire 133 to rotate the driving wheel 132, the driving wheel 132 pushes against the actuator 131, and the actuator 131 moves the inner tube 120 axially. In the process of axial movement, the limiting member 200 moves along with the inner tube 120 in the limiting space 210 formed by the first groove 111 and the second groove 121, so as to assist the inner tube 120 in positioning, and prevent the outer tube 110 from rotating relative to the inner tube 120, thereby achieving the limiting function. In addition, the packing member 202 disposed on the limiting member 200 can fill up the gap between the limiting member 200 and the limiting space 210 due to tolerance when assembled, so as to effectively prevent rotation and achieve better limiting effect.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims (8)

1. A bicycle seat tube structure, comprising:

the inner circumference of the outer pipe is provided with at least one first groove which extends axially;

the inner pipe is sleeved in the outer pipe and can axially move relative to the outer pipe, and the outer periphery of the inner pipe is provided with at least one second groove which axially extends;

at least one limiting piece, which comprises a body and a packing piece;

the driving structure is arranged in the outer pipe and penetrates between the inner pipes and is used for driving the inner pipes to switch between an axial moving state and a positioning state relative to the outer pipe;

the first groove and the second groove are arranged oppositely, and the limiting piece is accommodated in a limiting space formed by the first groove and the second groove.

2. A bicycle seat tube structure in accordance with claim 1, wherein said first groove extends along an axial length of an inner periphery of said outer tube.

3. The bicycle seat tube structure of claim 1, wherein the length of the second groove is equal to the length of the retaining member, and the retaining member is received in the second groove.

4. The bicycle seat tube structure of claim 1, wherein the body of the retainer is made of a metal material.

5. The bicycle seat tube structure of claim 1, wherein the retaining member urging member is made of an elastic material.

6. The bicycle seat tube structure of claim 1, wherein the urging member of the retaining member wraps around at least a portion of the body.

7. The bicycle seat tube structure of claim 6, wherein the body has a first diameter section and a second diameter section, the first diameter section having a first diametrical length that is less than the second diametrical length of the second diameter section.

8. The bicycle seat tube structure of claim 7, wherein the tightening member of the limiting member is wrapped around the first diameter section of the body such that a third diameter length formed by the combination of the body and the tightening member is greater than or equal to a second diameter length of the second diameter section.

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