TWM612659U - Stroke-adjustable telescopic seat tube of bicycle - Google Patents

Abstract

This creation is a bicycle telescopic seat tube, which includes a lower tube, a lower tube limiting component, an upper tube and at least one stroke adjustment structure. The lower tube limiting component is detachably arranged on the top of the lower tube, and the upper tube is slidably located. Wear a down tube. The stroke adjustment structure is arranged on the upper tube, and each stroke adjustment structure has a plurality of positioning grooves and an upper tube limiter. The positioning grooves are formed on the outer ring surface of the upper tube and are arranged along the length direction of the upper tube. The upper tube limiting member is detachably arranged on the upper tube, and can abut against the lower tube limiting component to limit the adjustment stroke of the telescopic seat tube, and the height of the upper tube limiting member can be changed by piercing different positioning grooves. In this way, the adjustment stroke of the invention can be shortened, and the highest position of the adjustment stroke can be lowered or the lowest position of the adjustment stroke can be increased, which is more convenient to use.

Description

Bicycle telescopic seat tube with adjustable stroke

This creation relates to a kind of bicycle parts, especially a telescopic seat tube that uses a pneumatic rod to drive and extend.

In order to meet the two different needs of bicycles for off-road riding on rugged roads and road riding on flat roads, the industry has developed a telescopic seat tube with internal air pressure rods that can adjust the height of the seat cushion during riding. .

The telescopic seat tube includes a lower tube, an upper tube, a locking mechanism and a pneumatic bar; the lower tube is connected to the bicycle frame; the upper tube slidably penetrates the lower tube, and protrudes upwards outside the lower tube to connect to the seat cushion of the bicycle ; The pneumatic rod penetrates the upper tube, and drives the upper tube to protrude upward from the lower tube with the elastic force of the air pressure; the locking mechanism can lock the position of the upper tube.

When riding off-road, the user presses down on the seat cushion with body weight, presses most of the upper tube of the telescopic seat tube down into the lower tube, and locks the upper tube with a locking mechanism to fix the seat cushion on a lower part. The off-road position allows the seat cushion to maintain a large distance from the user’s crotch to prevent the seat cushion from hitting the crotch, and it is also convenient for the user to adjust the position of the center of gravity of the body to maintain riding balance.

After returning to flat riding, the locking mechanism is released, and then the user slowly raises the hips to allow the seat cushion to rise to a higher flat riding position with the air pressure of the pneumatic rod, and then locks its position again with the locking mechanism. It is convenient for users to ride at high speed on flat roads.

However, the adjustment stroke of the telescopic seat tube in the prior art cannot be adjusted, that is, after the locking mechanism is released, the limit position of the upper tube to the lowest point cannot be changed, but in some cases If the adjustment stroke is too much, it will cause inconvenience in use. For example, suppose the user’s height is 170 cm. When riding off-road, the height between the ground and the seat is adjusted to 93~80 cm due to the terrain, and the telescopic seat tube needs to travel 13 cm. However, if the route is flat, it is suitable The seat height may be between 93 and 83 cm, and the telescopic stroke only needs 10 cm. In other words, the minimum height required at this time is higher. However, because the user is sitting on the seat cushion, when the locking mechanism is released when adjusting the telescopic seat tube, the seat cushion will immediately drop to the lowest height due to the weight, and then adjust the height of the buttocks to raise the seat cushion to the desired level. Therefore, when the required minimum height is high, it takes a certain amount of time to adjust the height of the buttocks to allow the seat cushion to rise from the actual minimum height, which is very inconvenient.

Therefore, the prior art telescopic seat tube for bicycles needs to be improved.

In view of the aforementioned shortcomings and deficiencies of the prior art, this invention provides a bicycle telescopic seat tube with adjustable stroke, which can be shortened to adjust the lowest height, so as to be suitable for different riding situations.

In order to achieve the above creative purpose, the technical means used in this creation is to design a bicycle telescopic seat tube with adjustable stroke, including a lower tube; a lower tube limiting component, which is detachably set on the top of the lower tube; Tube, which penetrates the down tube downward from the top end of the down tube; the upper tube can slide relative to the down tube; at least one stroke adjustment structure is provided on the upper tube and has: a plurality of positioning grooves, which form On the outer ring surface of the upper tube, and arranged along the length direction of the upper tube; An upper tube limiting member, which is detachably arranged on the outer ring surface of the upper tube; the upper tube limiting member is formed with: an abutting portion, which can abut the lower tube limiting component upward to The upper tube is restricted from protruding upward from the lower tube; a through part is connected to the abutting part, and one of the positioning grooves is selectively penetrated to change the position of the abutting part relative to the upper tube.

When the user wants to increase the minimum height of the adjustment stroke, first shorten the adjustment stroke. First remove the lower tube limiting component and withdraw the upper tube together with the upper tube limiting piece out of the lower tube, and then change the penetration part of the upper tube limiting piece into the positioning slot closer to the top of the upper tube. Put back the lower tube together, so that the position of the abutting part will move up relative to the upper tube, so that the abutting part abuts against the lower tube limiting component earlier to lower the upper tube's protruding limit position, thus shortening the adjustment stroke, and It is equivalent to lowering the maximum height of the adjustment stroke (from 93 to 80 cm to 90 to 80 cm); then adjust the bezel on the frame and pull out the creation and the seat cushion together to the original maximum height (90 to 80 cm). Cm to 93~83 cm), so that the shortened adjustment stroke increases the minimum height, so that the user only needs to spend a short time to raise the seat cushion from the minimum height to the required height. This is convenient to use.

Furthermore, the bicycle telescopic seat tube with adjustable stroke, wherein: the outer ring surface of the upper tube further protrudes to form at least one limiting flange; the positioning grooves of the at least one stroke adjusting structure are located in the Below at least one limiting flange; the abutting portion of the upper tube limiting member of the at least one stroke adjustment structure is selectively located above the at least one limiting flange; wherein, when the upper tube limiting member When the lowermost positioning groove is penetrated by the penetration portion, the at least one limiting flange can abut the lower tube limiting component upward to restrict the upper tube from protruding upward from the lower tube.

Furthermore, the bicycle telescopic seat tube with adjustable stroke, wherein: the outer ring surface of the upper tube is further formed with at least one abutting portion accommodating groove, which is located at the at least one limiting flange Below; when the penetration portion of the upper tube limiting member passes through the lowermost positioning groove, the abutment portion penetrates the abutment portion accommodating groove.

Furthermore, in the bicycle telescopic seat tube with adjustable stroke, the upper tube limiting member of the at least one stroke adjusting structure further has a connecting portion that extends linearly along the length direction of the upper tube; The top and bottom ends of the connecting portion are respectively connected to the abutting portion and the penetration portion; the connecting portion abuts against the outer ring surface of the upper tube: the number of the at least one limiting flange is two, when the upper tube When the penetration portion of the limiting member penetrates the positioning slot other than the lowermost positioning slot, the two limiting flanges are respectively located on opposite sides of the connecting portion of the at least one stroke adjustment structure.

Furthermore, in the telescopic bicycle seat tube with adjustable stroke, the abutting portion of the at least one stroke adjusting structure extends along the circumferential direction of the upper tube.

Furthermore, the bicycle telescopic seat tube with adjustable stroke, wherein: the inner ring surface of the down tube is formed with at least one connecting portion guiding groove, and the at least one connecting portion guiding groove is along the length direction of the down tube The upper tube limiting member of the at least one stroke adjustment structure further has a connecting portion that extends linearly along the length direction of the upper tube and passes through the at least one connecting portion guide groove of the lower tube ; The top and bottom ends of the connecting portion are respectively connected to the abutting portion and the penetration portion.

10: Down tube

11: Connecting part guide groove

101: top

20: Lower tube limit component

21: Upper bushing

22: lock ring

23: oil seal

30: upper tube

31: Limiting flange

32: Abutment part receiving groove

40: Stroke adjustment structure

41: positioning slot

42: upper tube limit piece

421: Abutment Department

422: Wearing Department

423: connection part

4231: Snap to plane

51: Bolt

C: Barometer

A-A: Cutting line

B-B: cutting line

Figure 1 is the three-dimensional appearance of the creation.

Figure 2 is an exploded view of the creative components.

Figure 3 is an exploded view of some components of this creation.

Figure 4 is a schematic cross-sectional view of the creation.

Figure 5 is a schematic longitudinal partial cross-sectional view of the creation along the A-A cut line in Figure 4.

Figure 6 is a schematic longitudinal partial cross-sectional view of the creation along the BB cut line in Figure 4, showing that when the adjustment stroke of the creation is at the longest state, the limit flange of the upper tube faces upward and abuts against the limit component of the lower tube. Upper bushing.

Figures 7 to 9 are schematic diagrams of the creation along the AA cutting line in Figure 4, showing the operation steps of shortening the adjustment stroke; Figure 9 shows the upper tube stopper through the uppermost part The positioning groove reduces the adjustment stroke of this creation to the shortest state.

Figure 10 is a schematic diagram of the creation along the AA cutting line in Figure 4 in the longitudinal section, showing that the penetration part of the upper tube limiter penetrates the positioning slot at the bottom, so that the adjustment stroke of the creation is in the longest state .

Figure 11 is a schematic longitudinal partial cross-sectional view of the creation along the BB cut line in Figure 4, showing that when the adjustment stroke of the creation is reduced to the shortest state, the limiting flange of the upper tube is facing upward and abuts against the limiting component of the lower tube The upper bushing.

In the following, in conjunction with the drawings and the preferred embodiments of this creation, the technical means adopted by this creation to achieve the predetermined creation purpose are further explained.

Please refer to FIGS. 1 to 3, the bicycle telescopic seat tube with adjustable stroke of the present creation includes a lower tube 10, a lower tube limiting component 20, an upper tube 30 and at least one stroke adjusting structure 40. The specific number of the stroke adjustment structure 40 is two.

The aforementioned lower tube 10 has two connecting portion guide grooves 11 (as shown in FIG. 2) in this embodiment. The two connecting portion guide grooves 11 extend linearly along the length of the lower tube 10, and are respectively formed in the lower tube 10 The inner ring faces are opposite.

Please refer to FIG. 2 and FIG. 5 to FIG. 7, the aforementioned lower tube limiting component 20 is detachably disposed on the top end 101 of the lower tube 10. In this embodiment, the lower tube limiting component 20 includes an upper bushing 21, a lock ring 22 and an oil seal 23. The upper bushing 21 is annular and detachably passes through the lower tube 10, and is located in the lower tube Between the inner ring surface of 10 and the outer ring surface of the upper tube 30. The lock ring 22 is screwed to the top end 101 of the lower tube 10 to fix the upper bushing 21 and the oil seal 23 to the top end 101 of the lower tube 10.

The aforementioned upper tube 30 penetrates the lower tube 10 from the top end 101 of the lower tube 10 downward, and the upper tube 30 can slide relative to the lower tube 10. In this embodiment, the outer ring surface of the upper tube 30 is protrudingly formed with two limiting flanges 31, and each limiting flange 31 has an arc shape close to a semicircle. The limiting flange 31 can abut the upper bushing 21 of the lower tube limiting component 20 upward (as shown in FIG. 6) to restrict the upper tube 30 from protruding upward from the lower tube 10; in other words, the upper tube 30 protrudes upward The limit position (that is, the adjustment stroke) of the down tube 10 can be determined by the limit flange 31. In other preferred embodiments, the number of the limiting flange 31 can also be only one.

In this embodiment, the outer ring surface of the upper tube 30 is further formed with at least one abutting portion accommodating groove 32 located below the limiting flange 31. The abutting portion accommodating groove 32 is preferably a ring groove surrounding the upper tube 30, but it is not limited to this. The abutting portion accommodating groove 32 may also be a plurality of grooves spaced around the upper tube 30.

Please refer to FIGS. 2 to 4, the two stroke adjustment structures 40 described above are respectively provided on opposite sides of the upper tube 30. Each stroke adjusting structure 40 has a plurality of positioning grooves 41 and an upper tube limiting member 42. The positioning grooves 41 are formed on the outer circumferential surface of the upper tube 30 and are arranged along the length direction of the upper tube 30. In this embodiment, the positioning groove 41 penetrates the ring wall of the upper tube 30 and is located below the two limiting flanges 31.

The upper tube limiting member 42 is detachably provided on the outer ring surface of the upper tube 30 and penetrates the lower tube 10. The upper tube limiting member 42 is formed with an abutting portion 421, a penetration portion 422 and a connecting portion 423.

Please refer to FIG. 8, FIG. 9 and FIG. 11, the abutting portion 421 can abut the lower tube limiting component 20 upward to restrict the upper tube 30 from protruding upward from the lower tube 10 (as shown in FIG. 11); In other words, the limit position of the upper tube 30 protruding upward from the lower tube 10 may be determined by the abutting portion 421 of the upper tube limiting member 42 or the limiting flange 31 of the upper tube 30 as described above. In other preferred embodiments, the upper tube 30 may not be provided with the limiting flange 31, and the upper tube limiting member 42 alone determines the limit position of the upper tube 30 protruding. Specifically, the abutment 421 is an arc-shaped piece extending along the circumferential direction of the upper tube 30, and the top edge of the abutting portion 421 abuts against the bottom edge of the upper bushing 21 upward.

The penetration portion 422 can be penetrated with any positioning groove 41, and the position of the abutting portion 421 relative to the upper tube 30 is changed according to the positioning groove 41 penetrated, thereby changing the limit position of the upper tube 30 protruding upward from the lower tube 10. Specifically, when the penetration portion 422 penetrates the positioning groove 41 at the bottom (that is, the closest to the bottom end of the upper tube 30), the abutment portion 421 will be located below the limiting flange 31 and penetrate the abutment portion accommodating In the slot 32, when the upper tube 30 protrudes upward from the lower tube 10, the limiting flange 31 will abut the upper bushing 21 upward to restrict the upper tube 30 from continuing to protrude upward from the lower tube 10; in other words, when When the penetration portion 422 penetrates the lowermost positioning groove 41, the limit position of the upper tube 30 protruding upward from the lower tube 10 is determined by the position of the limiting flange 31. When the penetration portion 422 penetrates the other positioning groove 41, the abutting portion 421 will be located above the limiting flange 31. At this time, the limit position of the upper tube 30 protruding upward from the lower tube 10 is determined by the position of the abutting portion 421. Decided.

The connecting portion 423 extends linearly along the length direction of the upper tube 30, and the top and bottom ends of the connecting portion 423 are respectively connected to the abutting portion 421 and the penetration portion 422. In this embodiment, the two limiting flanges of the upper tube 30 are respectively located on opposite sides of the connecting portion 423, and the side of the connecting portion 423 facing the upper tube 30 has an abutting plane 4231, and the abutting plane 4231 abuts against the upper tube. 30 and extends from the top end of the connecting portion 423 to the bottom end of the connecting portion 423; in other words, because the limiting flange 31 does not surround the upper tube, the connecting portion 423 can maintain a complete straight line ( That is, the abutment plane 4231 extends from the top end of the connecting portion 423 to the bottom end of the connecting portion 423) without being curved or forming a groove in order to bypass the limiting flange 31, thereby maintaining the structural strength of the connecting portion 423. Can withstand greater abutment force. In addition, the connecting portion 423 penetrates the connecting portion guide groove 11 of the lower tube 10, whereby the connecting portion 423 can prevent the upper tube 30 from rotating relative to the lower tube 10, and can replace the components with the same function in the conventional telescopic seat tube. Finally, the cross-sectional shape of the connecting portion guide groove 11 preferably corresponds to the cross-sectional shape of the connecting portion 423, so that the guide groove 11 can be used to limit the bending deformation of the connecting portion 423 and prevent the slender connecting portion 423 from buckling when subjected to pressure. .

In addition, the upper tube limiting member 42 is not limited to having an obvious connecting portion 423, and only has to have the abutting portion 421 and the penetrating portion 422 connected to each other. For example, in other preferred embodiments, the upper tube limiting member may also be screwed to a bolt of the positioning groove 41, and the abutting portion 421 and the penetration portion 422 are the head and the threaded portion of the bolt, respectively. can.

Please refer to Fig. 2, Fig. 5, Fig. 6 and Fig. 10 as shown in Figs. The top end of the pneumatic rod C is fixed to the top end of the upper tube 30 with a bolt 51, the bottom end of the pneumatic rod C is fixed to the bottom end of the lower tube 10, and the elastic force of the pneumatic rod C is used to drive the upper tube 30 to protrude upward from the lower tube 10. The penetration portion 422 of the upper tube limiting member 42 penetrates the positioning groove 41 at the bottom (that is, closest to the bottom end of the upper tube 30), so that the abutting portion 421 of the upper tube limiting member 42 is located on the limiting flange 31 Below. At this time, the upper tube 30 will continue to protrude upward from the lower tube 10 until the limiting flange 31 of the upper tube 30 abuts up against the upper bushing 21 of the lower tube limiting component 20 (as shown in FIG. 10 ).

Please refer to FIGS. 7-9. When the user wants to shorten the protruding stroke of the upper tube 30, first separate the lower tube limiting assembly 20 from the lower tube 10 and withdraw the upper tube 30 (as shown in FIG. 7). Then, the upper tube limiting member 42 on both sides of the upper tube 30 is changed to pass through the upper positioning groove 41, so that the position of the abutting portion 421 of the upper tube limiting member 42 is higher than the limiting flange 31 (as shown in FIG. 8 Show). At this time, when the upper tube 30 protrudes from the lower tube 10, the abutting portion 421 of the upper tube limiting member 42 abuts the upper bushing 21 of the lower tube limiting assembly 20 early, thereby shortening the upper tube 30 protruding upward from the lower tube The limit position of 10 (as shown in Figure 9), in other words, reduces the adjustment stroke.

Another advantage of the present invention is that by arranging the positioning groove 41 below the limiting flange 31, the positioning groove 41 and the upper tube limiting member 42 can be prevented from being exposed under normal use. In addition, the abutting portion 421 can penetrate the abutting portion accommodating groove 32 to avoid friction with the down tube 10.

To sum up, this creation further designs the positioning groove 41 and the detachable upper tube stopper 42, so that the adjustment stroke of the telescopic seat tube can be reduced in line with the shorter users, which can reduce the maximum adjustment stroke. The position, or the tie ring on the frame, can increase the lowest position of the adjustment stroke, so it is more convenient to use.

The above description is only the preferred embodiment of the creation, and does not limit the creation in any form. Although the creation has been disclosed in the preferred embodiment as above, it is not intended to limit the creation. Any technical field has Generally knowledgeable persons, without departing from the scope of this creative technical solution, can use the technical content disclosed above to make slight changes or modifications to equivalent embodiments with equivalent changes. However, any content that does not deviate from this creative technical solution is based on this Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence of the creation still fall within the scope of the technical solution for creation.

10: Down tube

11: Connecting part guide groove

101: top

20: Lower tube limit component

21: Upper bushing

22: lock ring

23: oil seal

30: upper tube

31: Limiting flange

32: Abutment part receiving groove

40: Stroke adjustment structure

42: upper tube limit piece

51: Bolt

C: Barometer

Claims (6)

A bicycle telescopic seat tube with adjustable stroke, including One click The lower tube limit component, which is detachably arranged on the top of the lower tube; An upper tube, which penetrates the lower tube downward from the top end of the lower tube; the upper tube can slide relative to the lower tube; At least one stroke adjustment structure is provided on the upper tube and has: A plurality of positioning grooves are formed on the outer ring surface of the upper tube and arranged along the length direction of the upper tube; An upper tube limiter, which is detachably arranged on the outer ring surface of the upper tube; the upper tube limiter is formed with: An abutment portion, which can abut the lower tube limiting component upward to restrict the upper tube from protruding upward from the lower tube; A penetration portion is connected to the abutting portion and selectively penetrates one of the positioning grooves to change the position of the abutment portion relative to the upper tube. The bicycle telescopic seat tube with adjustable stroke as described in claim 1, wherein: The outer ring surface of the upper tube is further protrudingly formed with at least one limiting flange; The positioning grooves of the at least one stroke adjustment structure are located below the at least one limiting flange; The abutting portion of the upper tube limiting member of the at least one stroke adjustment structure is selectively located above the at least one limiting flange; Wherein, when the penetration portion of the upper tube limiting member penetrates the lowermost positioning groove, the at least one limiting flange can be upwardly abutted against the lower tube limiting component to restrict the upper tube from facing upward Highlight the down tube. The bicycle telescopic seat tube with adjustable stroke as described in claim 2, wherein: The outer ring surface of the upper tube is further formed with at least one abutting portion accommodating groove, which is located under the at least one limiting flange; When the penetration portion of the upper tube limiting member penetrates the lowermost positioning groove, the abutment portion penetrates the abutment portion accommodating groove. The bicycle telescopic seat tube with adjustable stroke as described in claim 2, wherein: The upper tube limiting member of the at least one stroke adjustment structure further has a connecting portion that extends linearly along the length direction of the upper tube; the top and bottom ends of the connecting portion are respectively connected to the abutting portion and the penetration部; The connecting portion abuts the outer ring surface of the upper tube: The number of the at least one limiting flange is two. When the penetration portion of the upper tube limiting member penetrates the positioning groove other than the lowermost positioning groove, the two limiting flanges are respectively located at the at least one positioning groove. Opposite sides of the connecting part of the stroke adjustment structure. The bicycle telescopic seat tube with adjustable stroke according to any one of claims 1 to 4, wherein the abutting portion of the at least one stroke adjusting structure extends along the circumferential direction of the upper tube. The bicycle telescopic seat tube with adjustable stroke according to any one of claims 1 to 4, wherein: The inner ring surface of the down tube is formed with at least one connecting portion guiding groove, and the at least one connecting portion guiding groove extends linearly along the length direction of the down tube; The upper tube limiting member of the at least one stroke adjustment structure further has a connecting portion that extends linearly along the length direction of the upper tube and passes through the at least one connecting portion guide groove of the down tube; the connecting portion The top and bottom ends of the part are respectively connected with the abutting part and the penetration part.

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