Weight-reducing riser seatpost

Abstract

The lifting seat tube provided by this invention includes an outer tube, an inner tube, and a fluid cylinder. The inner tube is inserted through the outer tube in a vertically movable manner, and has a top end outside the outer tube and a bottom end inside the outer tube. The fluid cylinder has a cylinder body disposed inside the inner tube and a piston rod inserted through the cylinder body, with the bottom end of the cylinder body fixed to the bottom end of the inner tube. Therefore, the lifting seat tube provided by this invention can achieve the effect of weight reduction.

Description

Technical Field

[0001] This invention relates to the field of lifting seat post technology, and more particularly to a lifting seat post that can reduce weight. Background Technology

[0002] The lifting seat post disclosed in US 20230322320 A1 uses a pipe-connecting member and a connecting member to fix the top of the pneumatic cylinder to the top of the inner tube. However, this structural configuration of fixing the top of the pneumatic cylinder to the top of the inner tube results in an increase in the length of the piston rod, thus increasing the overall weight. Furthermore, if a short-stroke pneumatic cylinder is used, it is necessary to use fasteners such as long bolts to fix the top of the pneumatic cylinder to the top of the inner tube, and these fasteners will also increase in weight due to their length. Therefore, there is room for improvement in the aforementioned structural configuration. Summary of the Invention

[0003] The main objective of this invention is to provide a lifting seat tube that can reduce weight.

[0004] To achieve the aforementioned main objectives, the lifting seat tube provided by the present invention includes an outer tube, an inner tube, and a fluid cylinder. The inner tube is inserted through the outer tube in a vertically movable manner, and the inner tube has a top end located outside the outer tube and a bottom end located inside the outer tube; the fluid cylinder has a cylinder body disposed inside the inner tube and a piston rod inserted through the cylinder body, wherein the cylinder body has a bottom end, and the bottom end of the cylinder body is fixed to the bottom end of the inner tube.

[0005] As described above, the lifting seat tube of the present invention, by fixing the bottom end of the cylinder to the bottom end of the inner tube, can not only effectively shorten the length of the piston rod, but also eliminate the need for long bolts for fixing if a short-stroke fluid cylinder is selected. Therefore, the lifting seat tube provided by the present invention not only achieves the effect of weight reduction, but also increases the degree of freedom in assembly when selecting fluid cylinders with different strokes.

[0006] Preferably, the bottom end of the inner tube has a radial through hole, and the outer circumferential surface of the bottom end of the cylinder has an annular groove. A pin is inserted through the radial through hole and engaged with the annular groove, so that the bottom end of the cylinder is fixed to the bottom end of the inner tube.

[0007] Preferably, the bottom end of the inner tube has an internal thread, and the bottom end of the cylinder has an external thread. The external thread of the bottom end of the cylinder is screwed into the internal thread of the bottom end of the inner tube, so that the bottom end of the cylinder is fixed to the bottom end of the inner tube by screwing.

[0008] Preferably, the bottom end of the inner tube has an internal thread, and the bottom end of the cylinder body extends downward into an extension, the outer periphery of which has an external thread. A bottom plug is disposed between the inner tube and the cylinder body, the bottom plug is fitted onto the extension of the cylinder body, and the bottom plug has an internal thread and an external thread. The internal thread of the bottom plug is screwed into the external thread of the extension of the cylinder body, and the external thread of the bottom plug is screwed into the internal thread of the inner tube, so that the bottom end of the cylinder body is fixed to the bottom end of the inner tube by the bottom plug.

[0009] Detailed descriptions of the weight-reducing lifting seat post provided by this invention, including its construction, features, assembly, and usage, will be provided in the subsequent detailed description of embodiments. However, those skilled in the art will understand that these detailed descriptions and the specific embodiments listed for implementing this invention are merely illustrative and not intended to limit the scope of the claims. Attached Figure Description

[0010] Figure 1 This is a perspective view of the lifting seat tube according to the first embodiment of the present invention;

[0011] Figure 2 This is a partial exploded perspective view of the lifting seat tube according to the first embodiment of the present invention;

[0012] Figure 3 This is a cross-sectional view of the lifting seat tube according to the first embodiment of the present invention;

[0013] Figure 4 for Figure 3 An enlarged view of part A;

[0014] Figure 5 This is a partial cross-sectional view of the lifting seat tube according to the second embodiment of the present invention;

[0015] Figure 6 This is a partial cross-sectional view of the lifting seat tube according to the third embodiment of the present invention.

[0016] The annotations in the attached figures are explained as follows:

[0017] 10: Lifting seat post;

[0018] 12: Seat cushion clamping device;

[0019] 14: Wire control unit;

[0020] 20: Outer tube;

[0021] 22: Bottom;

[0022] 30: Inner tube;

[0023] 32: Top;

[0024] 34: Bottom;

[0025] 36: Internal thread section;

[0026] 38: Radial perforation;

[0027] 40: Fluid pressure cylinder;

[0028] 41: Cylinder block;

[0029] 42: Bottom;

[0030] 43: Extension section;

[0031] 44: Annular groove;

[0032] 45: Piston rod;

[0033] 46: Bottom;

[0034] 47: External thread section;

[0035] 50: Bottom plug;

[0036] 51: Internal thread section;

[0037] 52: External thread section;

[0038] 60: Sold parts. Detailed Implementation

[0039] The applicant hereby clarifies that throughout this specification, including the embodiments described below and the claims, directional terms are based on the directions shown in the accompanying drawings. Secondly, in the embodiments and drawings described below, the same component reference numerals represent the same or similar components or their structural features.

[0040] Please see Figure 1 and Figure 2 The lifting seat tube 10 of the first embodiment of the present invention includes an outer tube 20, an inner tube 30, and a fluid cylinder 40.

[0041] The inner tube 30 is inserted into the outer tube 20 from the top end of the outer tube 20 in a vertically movable manner. The inner tube 30 has a top end 32 and a bottom end 34. The top end 32 of the inner tube 30 is located outside the outer tube 20 and is used to connect a pad clamping device 12. The bottom end 34 of the inner tube 30 is located inside the outer tube 20 and has two opposing radial through holes 38.

[0042] The fluid cylinder 40 has a cylinder body 41 and a piston rod 45. The cylinder body 41 is disposed in the inner tube 30 and has a bottom end 42 and an extension 43 integrally extending downward from the bottom end 42, such as... Figure 2As shown, the outer periphery of the extension 43 has an annular groove 44; the piston rod 45 is inserted into the cylinder 41 from the bottom end 42 in a vertically movable manner, the top end of the piston rod 45 (not shown in the figure) is located inside the cylinder 41, and the bottom end 46 of the piston rod 45 protrudes from the bottom end 22 of the outer tube 20 and can be triggered by a wired control unit 14 located below the outer tube 20 to force the fluid cylinder 40 to open. When the fluid cylinder 40 is opened, the inner tube 30 can rise or fall relative to the outer tube 20.

[0043] In this embodiment, the bottom end 42 of the cylinder body 41 is fixed to the bottom end 34 of the inner tube 30 by two pins 60. More specifically, as... Figures 2 to 4 As shown, the two pins 60 pass through the two pin holes 38 and engage with the annular groove 44 of the extension 43 of the cylinder body 41, so that the bottom end 34 of the inner tube 30 and the bottom end 42 of the cylinder body 41 are fixed together, and the two pins 60 enhance the connection strength between the cylinder body 41 and the bottom plug 50.

[0044] It should also be noted that the bottom end 42 of the cylinder block 41 can also be fixed to the bottom end 34 of the inner tube 30 in different ways. For example, such as... Figure 5 As shown, the bottom end 34 of the inner tube 30 has an internal thread 36, and the outer circumference of the extension 43 of the cylinder body 41 has an external thread 47. A bottom plug 50 is disposed between the inner tube 30 and the cylinder body 41. The bottom plug 50 is fitted onto the extension 43 of the cylinder body 41, and the bottom plug 50 has an internal thread 51 and an external thread 52. The internal thread 51 of the bottom plug 50 is screwed into the external thread 47 of the extension 43 of the cylinder body 41, and the external thread 52 of the bottom plug 50 is screwed into the internal thread 36 of the inner tube 30, so that the bottom end 34 of the inner tube 30 is fixed together with the bottom end 42 of the cylinder body 41 by the bottom plug 50. For example... Figure 6 As shown, the outer peripheral surface of the extension 43 of the cylinder body 41 has an external thread 47. The external thread 47 of the extension 43 of the cylinder body 41 is screwed into the internal thread 36 of the bottom end 34 of the inner tube 30, so that the bottom end 34 of the inner tube 30 is fixed together with the bottom end 42 of the cylinder body 41 by screwing.

[0045] As described above, the lifting seat tube 10 provided by the present invention fixes the bottom end 42 of the cylinder body 41 to the bottom end 34 of the inner tube 30, preventing axial relative displacement between the cylinder body 41 and the inner tube 30. It also effectively shortens the length of the piston rod 45. Furthermore, if a short-stroke fluid cylinder 40 is selected, long bolts are not required for fixing. Therefore, the lifting seat tube 10 provided by the present invention not only achieves weight reduction but also increases assembly flexibility when selecting fluid cylinders 40 with different strokes.

Claims

1. A lifting seat post, comprising: One outer tube; An inner tube, movable vertically, is inserted through the outer tube. The inner tube has a top end located outside the outer tube and a bottom end located inside the outer tube; and A fluid pressure cylinder has a cylinder body disposed within an inner tube and a piston rod that can be vertically displaced through the cylinder body, wherein... The cylinder has a bottom end, which is fixed to the bottom end of the inner tube.

2. The lifting seat tube according to claim 1, wherein, The bottom end of the inner tube has a radial through hole, and the outer circumference of the bottom end of the cylinder has an annular groove. A pin is inserted through the radial through hole and engaged in the annular groove, so that the bottom end of the cylinder is fixed to the bottom end of the inner tube.

3. The lifting seat tube according to claim 1, wherein, The bottom end of the inner tube has an internal thread, and the bottom end of the cylinder extends downward into an extension. The outer periphery of the extension has an external thread. A bottom plug is disposed between the inner tube and the cylinder. The bottom plug is fitted onto the extension of the cylinder and has an internal thread and an external thread. The internal thread of the bottom plug is screwed into the external thread of the extension of the cylinder, and the external thread of the bottom plug is screwed into the internal thread at the bottom end of the inner tube.

4. The lifting seat tube according to claim 1, wherein, The bottom end of the inner tube has an internal thread, and the bottom end of the cylinder has an external thread. The external thread of the cylinder is screwed into the internal thread of the inner tube.

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