CN219821623U - Bicycle seat tube - Google Patents

Abstract

The bicycle seat tube of the present disclosure includes an outer tube, an inner tube, a pneumatic rod and a pressure adjusting device. The inner tube can pass through the outer tube in a vertically displaceable way, the air pressure rod is provided with a part of air cylinder arranged in the inner tube and a floating piston arranged in the air cylinder, the pressure adjusting device is provided with a knob and an adjusting piece, the knob is arranged in the inner tube, the adjusting piece is arranged on the knob in a mode that the adjusting piece can move along the axial direction of the inner tube and can not rotate relative to the inner tube, and one end of the adjusting piece penetrates into the air cylinder to be abutted against the floating piston. Therefore, when the adjusting piece is driven by the knob, the floating piston is driven to move up and down along the axial direction of the inner tube in the cylinder, so that the floating piston changes the volume of fluid, and the purpose of adjusting the pressure of the fluid is achieved.

Description

Bicycle seat tube

Technical Field

The present disclosure relates to bicycles and, more particularly, to a bicycle seat tube that facilitates fluid pressure adjustment.

Background

The telescoping seatpipe disclosed in TW M611035 uses a tool to extend into the adjustment aperture of the upper tube and lock or unlock the adjustment rod when adjusting the fluid pressure, thereby changing the up and down position of the floating piston to adjust the tightness of the gas pressure bar. However, in this patent, the seat cushion and the upper cover and the lower cover need to be removed together, so that the tightness of the air pressure rod can be adjusted by using the tool, and the seat cushion and the upper cover and the lower cover need to be reloaded together after the adjustment is completed, which is too troublesome in terms of the adjustment process and inconvenient to operate.

The bicycle seat post disclosed by TW M626353 utilizes a tool to extend into one of the side holes of the adjustment seat via a radial through hole when adjusting the fluid pressure to drive the adjustment seat to rotate, and forces the screw to axially displace and push against the second piston when the adjustment seat rotates in place, thereby reducing the volume between the second piston and the first piston and further increasing the pressure of the gas. In this patent, although the upper and lower covers are not required to be removed when adjusting the fluid pressure, in order to restrict the adjustment seat to only rotate in place, a screw seat is provided below the adjustment seat in addition to a spacer provided above the adjustment seat, so that the adjustment seat can only rotate in place and not move in the axial direction of the screw when driven by a tool under the restriction of the spacer and the screw seat. However, such a structural configuration may cause problems of excessive components.

Disclosure of Invention

The main object of the present disclosure is to provide a bicycle seat tube that can simplify the structure and facilitate the adjustment of the pressure of a fluid.

In order to achieve the above-mentioned main object, the bicycle seat tube of the present disclosure comprises an outer tube, an inner tube, a pneumatic rod, and a pressure adjusting device. The inner tube is arranged on the outer tube in a penetrating way in a vertically displaceable way, and the inner tube is provided with a top end protruding out of the outer tube; the air pressure rod is provided with an air cylinder and a floating piston, the air cylinder is arranged in the inner pipe, and the floating piston can be arranged in the air cylinder in an up-and-down displacement manner; the pressure adjusting device is provided with a knob and an adjusting piece, wherein the knob is arranged in the top end of the inner tube in a mode of rotating in situ, the adjusting piece is arranged on the knob in a mode of moving along an axial direction of the inner tube and not rotating relative to the inner tube, and one end of the adjusting piece penetrates into the cylinder to be abutted against the floating piston.

When the pressure of a fluid stored in the cylinder needs to be adjusted, a tool (such as a screwdriver) penetrates through the inner tube and is embedded in the knob to force the knob to rotate, and the adjusting piece can be driven to move downwards along the axial direction of the inner tube and push the floating piston in the rotating process of the knob, so that the floating piston compresses the volume of the fluid, and the pressure of the fluid is increased; conversely, if the pressure of the fluid is to be reduced, the tool is used to rotate the knob in the opposite direction, so that the adjusting member moves upward along the axial direction of the inner tube to release the force applied to the floating piston, thereby reducing the pressure of the fluid. In other words, the bicycle seat tube of the present disclosure can achieve the purpose of conveniently adjusting the fluid pressure, and in addition, the knob and the adjusting member are configured to achieve the effect of simplifying the structure.

In a further embodiment, the top end of the inner tube has an adjustment hole, the outer surface of the knob has a plurality of driving holes arranged at intervals, and at least one of the driving holes of the knob corresponds to the adjustment hole of the inner tube. Thus, the tool (such as a screwdriver) is inserted through the adjusting hole of the inner tube and is embedded in one of the driving holes of the knob to force the knob to rotate

In a further embodiment, the knob has a disk portion, a shaft portion connecting the disk portion, and a shaft hole penetrating the disk portion and the shaft portion, the outer surface of the disk portion has the plurality of driving holes, and the top end of the hole wall of the shaft hole has a second internal thread portion. The adjusting piece is provided with a screw rod part and a pushing part connected with the screw rod part, and is penetrated in the shaft hole of the knob, on one hand, the screw rod part is spirally arranged on the second internal thread part of the knob, and on the other hand, the pushing part is abutted against the floating piston. The knob can drive the adjusting piece to move up and down along the axial direction of the inner tube through the threaded relationship between the second internal thread part of the knob and the screw rod part of the adjusting piece.

In a further embodiment, the top end of the inner tube has an upper receiving groove for receiving the knob, and the groove wall of the upper receiving groove has a first internal thread portion. The pressure adjusting device is further provided with a stop ring, the stop ring is arranged in the upper containing groove and sleeved on the shaft part of the knob, the outer ring surface of the stop ring is provided with an external thread part, the stop ring is spirally arranged on the first internal thread part of the inner tube by the external thread part on one hand, and the bottom surface of the stop ring is abutted against the top surface of the disk part of the knob on the other hand, so that the knob is limited by the stop ring and cannot move upwards along the axial direction of the inner tube.

In a further embodiment, the groove wall of the upper containing groove is provided with a first inner flange adjacent to the lower part of the first inner thread part, and the bottom surface of the stop ring abuts against the first inner flange, so that the stop ring is kept fixed.

In a further embodiment, the inner tube has a lower receiving groove for receiving the cylinder and a second inner flange between the upper receiving groove and the lower receiving groove, the second inner flange of the inner tube receiving the bottom surface of the disk portion of the knob such that the knob is restrained from moving downward in the axial direction of the inner tube by the second inner flange.

The detailed construction, features, assembly or manner of use of the bicycle seat tube provided in the present disclosure will be described in the detailed description of the embodiments that follows. However, those of ordinary skill in the art will appreciate that the detailed description and the specific embodiments that are listed in this disclosure are presented by way of illustration only and are not intended to limit the scope of the present disclosure.

Drawings

Fig. 1 is a perspective view of a bicycle seat tube of the present disclosure.

Fig. 2 is a partial exploded perspective view of the bicycle seat tube of the present disclosure.

Fig. 3 is a cross-sectional view of a bicycle seat tube of the present disclosure.

Fig. 4 is a partial enlarged view of fig. 3.

FIG. 5 is similar to FIG. 4 and mainly shows the adjustment member being driven by the knob to push the floating piston downward.

Description of the reference numerals

10: bicycle seat tube

20: outer tube

30: inner pipe

31: top end

32: ear part

33: countersunk head hole

34: adjusting hole

35: upper container

352: top hole

36: a first internal thread part

37: a first inner flange

38: lower container

39: a second inner flange

40: seat cushion clamping device

41: upper clamping seat

412: upper clamping groove

414: nut hole

42: lower clamping seat

422: lower clamping groove

43: screw cap

44: bolt

50: pneumatic rod

51: cylinder

512: upper air chamber

514: lower air chamber

52: control valve

53: valve seat

532: valve hole

54: valve rod

55: control lever

56: trigger piece

57: rotation stopping piece

572: polygonal hole

58: floating piston

60: pressure adjusting device

61: knob

62: disk part

622: drive hole

63: shaft portion

64: shaft hole

65: a second internal thread part

66: stop ring

67: external screw thread part

68: gasket

69: adjusting piece

692: screw part

694: push top

Detailed Description

Applicant hereby gives notice that throughout this specification, including the examples presented below and claims, directional terms are used to refer to the directions in the drawings. Next, in the embodiments to be described below and the drawings, the same reference numerals denote the same or similar components or structural features thereof.

Referring to fig. 1 to 3, the bicycle seat tube 10 of the present disclosure is used in a bicycle (not shown) and includes an outer tube 20, an inner tube 30, a seat clamping device 40, a pneumatic rod 50, and a pressure adjusting device 60.

The inner tube 30 is inserted into the outer tube 20 from the top end of the outer tube 20. The inner tube 30 has a tip 31 protruding from the outer tube 20, the tip 31 of the inner tube 30 has two oppositely outwardly protruding lugs 32, each lug 32 has a countersunk hole 33, and the tip 31 of the inner tube 30 has an adjustment hole 34 (actually, the adjustment hole 34 may be provided in plural) penetrating its inner and outer surfaces, the adjustment hole 34 extending arcuately around the axial direction of the inner tube 30. As shown in fig. 2 and 4, the inner tube 30 has an upper container 35 radially communicating with the adjusting hole 34, the upper container 35 forms a top hole 352 at the top end 31 of the inner tube 30, and the groove wall of the upper container 35 has a first inner threaded portion 36 and a first inner flange 37 adjacent to and below the first inner threaded portion 36. In addition, as shown in fig. 4, the inner tube 30 further has a lower receptacle 38 below the upper receptacle 35, the lower receptacle 38 and the upper receptacle 35 being separated by a second inner flange 39.

The seat cushion clamping device 40 has an upper clamping seat 41, a lower clamping seat 42, two nuts 43 and two bolts 44, as shown in fig. 1 to 3, the bottom surfaces of two opposite sides of the upper clamping seat 41 are respectively provided with an upper clamping groove 412, and the other two opposite sides of the upper clamping seat 41 are respectively provided with a nut hole 414 penetrating through the top and bottom surfaces; the top surfaces of two opposite sides of the lower clamping seat 42 are respectively provided with a lower clamping groove 422 corresponding to the upper clamping groove 412; the nuts 43 are disposed in the nut holes 414 of the upper holder 41; the plurality of bolts 44 pass through the plurality of countersunk holes 33 of the plurality of ears 32 of the inner tube 30 from bottom to top and are mutually screwed with the plurality of nuts 43. Therefore, the seat cushion clamping device 40 covers the top hole 352 after being assembled to the inner tube 30, and further clamps two seat bows (not shown) of a seat cushion (not shown) in the middle by using the upper clamping grooves 412 of the upper clamping seat 41 and the lower clamping grooves 422 of the lower clamping seat 42, so as to complete the assembly with the seat cushion (not shown).

The air pressure bar 50 has an air cylinder 51 and a control valve 52, as shown in fig. 3, the air cylinder 51 is disposed in the lower container 38 of the inner tube 30 for storing fluid (here, high pressure gas); the control valve 52 has a valve seat 53, a valve rod 54 and a control rod 55, the valve seat 53 is disposed in the cylinder 51 to divide the interior of the cylinder 51 into an upper air chamber 512 and a lower air chamber 514, the valve seat 53 has a valve hole 532 for communicating the upper air chamber 512 and the lower air chamber 514, the valve rod 54 is disposed in the valve hole 532 of the valve seat 53 for controlling the communication between the upper air chamber 512 and the lower air chamber 514, the control rod 55 is disposed in the outer tube 20, the top end of the control rod 55 is disposed at the bottom end of the inner tube 30 and extends into the valve seat 53 to be connected with the valve rod 54, and the bottom end of the control rod 55 protrudes out of the bottom end of the outer tube 20 for pushing a trigger 56. Therefore, when the control rod 55 is not triggered by the trigger piece 56, the valve rod 54 is kept in a closed state, so that the upper air chamber 512 and the lower air chamber 514 are not communicated with each other, and the inner tube 30 cannot ascend or descend relative to the outer tube 20; conversely, when the control lever 55 is pushed by the trigger 56, the valve rod 54 is simultaneously opened to communicate the upper air chamber 512 and the lower air chamber 514, and at this time, if the seat cushion is loaded with the weight of the rider, the inner tube 30 can be lowered relative to the outer tube 20, and if the seat cushion is not loaded with the weight of the rider, the inner tube 30 can be raised relative to the outer tube 20. In addition, the air pressure rod 50 further has a rotation stopping member 57 and a floating piston 58, as shown in fig. 3 and 4, the rotation stopping member 57 is disposed in the upper air chamber 512 of the air cylinder 51, and has a portion abutting against the second inner flange 39 of the inner tube 30, and has a polygonal hole 572 (here, a hexagon is an example, but not limited thereto); the floating piston 58 is disposed within the upper air chamber 512 of the air cylinder 51 and is disposed adjacent to and below the rotation stopper 57.

The pressure adjusting device 60 is used for adjusting the internal pressure of the air pressure bar 50 to change the elastic force of the air pressure bar 50 acting on the inner tube 30. The pressure adjusting device 60 has a knob 61, a stop ring 66 and an adjusting member 69, as shown in fig. 2, the knob 61 has a disc portion 62, a shaft portion 63 and a shaft hole 64, the outer surface of the disc portion 62 has a plurality of driving holes 622 (the number is not limited) arranged at equal intervals, the shaft portion 63 is coaxially connected to the top surface of the disc portion 62, the shaft hole 64 penetrates through the disc portion 62 and the shaft portion 63, the top end of the hole wall of the shaft hole 64 has a second internal thread portion 65, and as shown in fig. 4, the knob 61 is disposed in the upper container 35 of the inner tube 30, on one hand, the at least one driving hole 622 corresponds to the adjusting hole 34 of the inner tube 30, on the other hand, the bottom surface of the disc portion 62 abuts against the second inner flange 39 of the inner tube 30, so that the knob 61 cannot move downwards along the axial direction of the inner tube 30; the stop ring 66 is arranged in the upper containing groove 35 and sleeved on the shaft part 63 of the knob 61, the outer ring surface of the stop ring 66 is provided with an external thread part 67, the external thread part 67 of the stop ring 66 is spirally arranged on the first internal thread part 36 of the inner tube 30, the bottom surface of the stop ring 66 is abutted against the first internal flange 37 of the inner tube 30, so that the stop ring 66 is kept fixed, in addition, the stop ring 66 is indirectly abutted against the top surface of the disc part 62 of the knob 61 through a gasket 68, so that the knob 61 cannot move upwards along the axial direction of the inner tube 30; the adjusting member 69 has a screw portion 692 and a push portion 694 connected to the screw portion 692, wherein the push portion 694 has a polygonal cross-sectional shape (for example, but not limited to, a hexagonal shape in this case), the adjusting member 69 is disposed on the knob 61 so as to be movable along the axial direction of the inner tube 30 and not rotatable relative to the inner tube 30, further, as shown in fig. 4, the adjusting member 69 is disposed in the shaft hole 64 of the knob 61, on the one hand, the screw portion 692 is screwed on the second internal thread portion 65 of the knob 61, and on the other hand, the bottom end of the push portion 694 is disposed through the polygonal hole 572 of the rotation stopper 57 and extends into the upper air chamber 512 of the air cylinder 51 to abut against the floating piston 58, so that the adjusting member 69 is restrained by the rotation stopper 57 when driven by the knob 61 and can only be lifted or lowered along the axial direction of the inner tube 30 and cannot rotate along with the knob 61.

As can be seen from the above, when the pressure of the fluid needs to be adjusted, as shown in fig. 5, a tool (such as a screwdriver, not shown) is inserted through the adjustment hole 34 of the inner tube 30 and is embedded in one of the driving holes 622 of the knob 61 to force the knob 61 to rotate, and the knob 61 cannot move up and down along the axial direction of the inner tube 30 due to the restriction of the stop ring 66 and the second inner flange 39, but can only rotate in situ, during the in-situ rotation of the knob 61, the knob 61 drives the adjustment member 69 to move down along the axial direction of the inner tube 30 and synchronously push the floating piston 58, so that the floating piston 58 compresses the space of the upper air chamber 512, and the pressure of the fluid is increased; conversely, when the pressure of the fluid is to be reduced, the tool is used to reversely rotate the knob 61 to move the adjusting member 69 upward along the axial direction of the inner tube 30 to release the force applied to the floating piston 58, so that the space of the upper air chamber 512 is enlarged and the pressure of the fluid is reduced.

In summary, the bicycle seat tube 10 of the present disclosure can achieve the purpose of quickly and conveniently adjusting the fluid pressure, and the seat cushion clamping device 40 is not required to be disassembled, so that the convenience in operation can be increased.

Claims (7)

1. A bicycle seat tube, comprising:

an outer tube;

the inner tube is arranged on the outer tube in a penetrating manner in an up-and-down displacement manner and is provided with a top end protruding out of the outer tube;

the air pressure rod is provided with an air cylinder and a floating piston, the air cylinder is at least partially arranged in the inner tube, and the floating piston is arranged in the air cylinder in a vertically displaceable manner; and

the pressure adjusting device is provided with a knob and an adjusting piece, the knob is arranged in the top end of the inner tube in a mode of being capable of rotating in situ, the adjusting piece is arranged on the knob in a mode of being capable of moving along the axial direction of the inner tube and being incapable of rotating relative to the inner tube, one end of the adjusting piece penetrates into the cylinder to be abutted against the floating piston, so that the adjusting piece can be driven by the knob to move along the axial direction of the inner tube, and the floating piston is driven to move up and down in the cylinder in the moving process.

2. The bicycle seat tube of claim 1, wherein the top end of the inner tube has an adjustment hole, the outer surface of the knob has a plurality of spaced apart drive holes, and at least one of the drive holes of the knob corresponds to the adjustment hole of the inner tube.

3. The bicycle seat tube according to claim 2, wherein the knob has a disc portion, a shaft portion connecting the disc portion and a shaft hole penetrating the disc portion and the shaft portion, the outer surface of the disc portion has the plurality of driving holes, and the top end of the hole wall of the shaft hole has a second internal thread portion; the adjusting piece is provided with a screw rod part and an ejection part connected with the screw rod part, the adjusting piece is arranged in the shaft hole of the knob in a penetrating mode, the screw rod part of the adjusting piece is spirally arranged on the second internal thread part of the knob, and the ejection part of the adjusting piece is abutted to the floating piston.

4. A seat tube for a bicycle according to claim 3, wherein the inner tube has an upper receiving groove for receiving the knob, and a groove wall of the upper receiving groove has a first female screw portion; the pressure adjusting device is provided with a stop ring, the stop ring is arranged in the upper containing groove and sleeved on the shaft part of the knob, the outer ring surface of the stop ring is provided with an external thread part, and the external thread part of the stop ring is spirally arranged on the first internal thread part of the inner pipe; the top surface of the disk portion of the knob abuts the stop ring.

5. The bicycle seat tube of claim 4, wherein the groove wall of the upper receiving groove has a first inner flange adjacent below the first inner thread, and the bottom surface of the stopper ring abuts against the first inner flange.

6. The bicycle seat tube according to claim 4 or 5, wherein the inner tube has a lower receiving groove for receiving the cylinder and a second inner flange between the upper receiving groove and the lower receiving groove; the bottom surface of the disk portion of the knob abuts against the second inner flange of the inner tube.

7. A saddle tube for bicycles, according to claim 1, wherein said pressure adjusting means is used to adjust the internal pressure of said air pressure bar to change the elastic force of said air pressure bar on said inner tube.