Bicycle seat tube quick release device, bicycle seat tube assembly and bicycle

Abstract

A bicycle seat tube quick release device, a bicycle seat tube assembly and a bicycle, wherein the quick release device comprises: a clamp ring, comprising a ring body sleeved on the seat tube and a clamp arm connected to the ring body; a fixed shaft, which is passed through the clamp arm; a handle, which is rotatably connected to the fixed shaft; a double-headed ball rod, whose two ends are respectively hinged with the clamp arm and the handle ball, and when the handle rotates along the first direction around the fixed shaft, the double-headed ball rod swings to press the clamp arm; when the handle rotates along the second direction around the fixed shaft, the double-headed ball rod swings to release the clamp arm; in the quick release device, the seat tube can be locked and released by rotating the handle only, the ball hinge has small rotation resistance, the handle is parallel to the clamp arm, the handle has a long force arm design and will not be blocked by the seat tube, and can save effort. The rod body of the double-headed ball rod will not wear, the adjustment distance will not change, the ball body is not easy to wear, and the service life is long.

Description

Technical Field

[0001] The invention relates to the field of bicycles, in particular to a bicycle seat tube quick-release device, a bicycle seat tube assembly and a bicycle. Background Art

[0002] Bicycles, especially shared bicycles, are used by a large customer base. Since customers have different heights, adjusting the seat height is an important part of the use. There are three main types of seat tube clamping quick releases: one is to lock with screws and nuts; the second is to lock with eccentric column handles, arc guide blocks, screws, and nuts using eccentric distance; the third is to use a cam structure, which uses the handle to rotate to drive the cam to have a peak-to-valley distance difference for locking.

[0003] All three of the above methods have certain disadvantages. The first type of locking requires special tools to lock, and tools are required to adjust the height of the seat cushion; the second type of handle is inconvenient to operate and requires a large pressing force; the third type of disadvantage is that due to surface contact, long-term use will cause material wear and lead to failure to lock. Therefore, it is necessary to improve the existing technology. Summary of the invention

[0004] Based on this, the present application provides a bicycle seat tube quick release device, which allows the user to quickly lock and release the seat tube by turning the handle with less force, and has a long service life.

[0005] The technical solution is as follows:

[0006] A bicycle seat tube quick-release device comprises: a clamp ring, comprising a ring body sleeved on the seat tube and a clamp arm connected to the ring body; a fixed shaft, passing through the clamp arm; a handle, rotatably connected to the fixed shaft; a double-headed ball rod, both ends of which are respectively hinged to the clamp arm and the handle ball, the double-headed ball rod has a certain offset relative to the axis of the fixed shaft to form an offset angle, when the handle rotates around the fixed shaft in a first direction, the double-headed ball rod swings in a direction to reduce the offset angle, and presses the clamp arm; when the handle rotates around the fixed shaft in a second direction, the double-headed ball rod swings in a direction to increase the offset angle, and loosens the clamp arm.

[0007] In the above-mentioned bicycle seat tube quick release device, the ring body of the clamp ring is sleeved on the seat tube, and the clamp arm can be pressed to lock the position of the seat tube, and the seat tube can be loosened by loosening the clamp arm to adjust the seat tube height. When the handle rotates in the first direction around the fixed axis, the double-headed ball rod swings to reduce the offset angle. According to the Pythagorean theorem, the projection length of the double-headed ball rod in the axial direction is increased, and the clamp arm is pressed to lock the seat tube for user use. When the handle rotates in the second direction around the fixed axis, the double-headed ball rod swings to increase the offset angle, that is, the projection length of the double-headed ball rod in the axial direction is shortened, and the clamp arm is loosened to release the seat tube. At this time, the user can adjust the height of the seat tube. In this quick release device, the seat tube can be locked and released by simply turning the handle. The ball joint has a small rotation resistance, the handle is parallel to the clamp arm, and the handle is designed to have a long force arm that will not be blocked by the seat tube and the clamp ring, which can save effort. At the same time, the rod body of the double-headed ball rod will not wear, the adjustment distance will not change, and the ball body is not easy to wear, and the service life is long.

[0008] In one embodiment, the clamp arm includes: a clamp arm body connected to the ring body, a first rotating mechanism arranged on the clamp arm body, the fixed axis passes through the first rotating mechanism, and the first rotating mechanism is hinged to a ball at one end of the double-headed ball rod.

[0009] In one embodiment, the first rotating mechanism comprises: a first base connected to the clamp arm body, a first cover plate buckled on the first base, a first fixing member fixing the first cover plate on the first base, a first ball groove is provided on the first base, a first through groove is provided on the first cover plate, and one end of the double-headed ball rod close to the first rotating mechanism enters the first ball groove through the first through groove. The ball articulation with the double-headed ball rod is better produced and processed by the first rotating mechanism, and at the same time, a large part of the ball head of the double-headed ball rod is hidden in the rotating mechanism and is not easy to rust. A small range of rust will appear on the exposed surface, which is easy to clean and does not affect the rotation of the ball articulation.

[0010] In one embodiment, a first protrusion is formed on one side of the first base facing the clamp arm body, and a first mounting groove is provided on the clamp arm body for the first protrusion to be embedded in. The first protrusion and the first mounting groove are used to fix the clamp arm body to the first rotating mechanism to prevent the first rotating mechanism from rotating, so that the double-headed club can push the clamp arm through the first rotating mechanism.

[0011] In one embodiment, the handle includes: a handle body, a second rotating mechanism disposed on the handle body and facing the clamp arm, the fixed axis passes through the second rotating mechanism, and the second rotating mechanism is hinged to a ball at one end of the double-headed club.

[0012] In one embodiment, the second rotating mechanism includes: a second base connected to the handle body, a second cover plate buckled on the second base, and a second fixing member fixing the second cover plate on the second base, a second ball groove is formed on the second base, and a second through groove is formed on the second cover plate, and one end of the double-headed ball rod close to the second rotating mechanism enters the second ball groove through the second through groove.

[0013] In one embodiment, a second protrusion is formed on a side of the second base facing the handle body, and a second mounting groove is provided on the handle body for the second protrusion to be embedded in. The second protrusion and the second mounting groove are used to fix the handle body to the second rotating mechanism, so that the second rotating mechanism can rotate synchronously with the handle body.

[0014] In one embodiment, the two ends of the fixed shaft in the length direction are respectively provided with end caps, and the handle has at least one force arm rotatably connected to the fixed shaft, and the side of the force arm away from the clamp arm abuts against one of the end caps. The end caps are used to limit the position of the handle in the axial direction, ensuring that the double-headed club only pushes or releases the clamp arm, and the handle will not move in the axial direction to affect the adjustment structure of the quick release device.

[0015] In one embodiment, the ends of the fixed shaft are respectively: a movable end and a fixed end, and the bicycle seat tube quick release device further comprises: an adjustment nut threadedly connected to the fixed shaft and abutting against the movable end. The adjustment nut abuts against the movable end and is used to adjust the distance between the movable end and the fixed end, so as to adjust the locking degree of the quick release device on the seat tube to avoid locking failure.

[0016] In one embodiment, the bicycle seat tube quick release device further includes: a locking mechanism, which is provided on the handle, and is used to lock the handle on the seat tube when the handle is rotated to the limit position along the first direction. The locking mechanism locks the handle and then locks the seat tube, thereby preventing the seat tube from moving when the user is using the bicycle, thereby preventing the user from being in danger.

[0017] In one embodiment, the locking mechanism includes: a bracket provided at the gripping end of the handle, a shaft provided in the bracket, a hook rotatably provided on the shaft, and a button for pushing the hook, the hook being used to engage in a locking position on the seat tube, and the button being used to push the hook out of the locking position.

[0018] In one embodiment, the locking mechanism further includes: a return torsion spring sleeved on the shaft and connected between the hook and the bracket.

[0019] An embodiment of the present application also provides a bicycle seat tube assembly, comprising: an outer tube having a first end, an inner tube inserted into the outer tube from the first end of the outer tube, and the bicycle seat tube quick release device as described above, wherein the first end of the outer tube is provided with a notch, and the ring body of the clamp ring is fixed to the first end of the outer tube.

[0020] The bicycle seat assembly can adjust the height of the inner tube quickly and conveniently through the quick-release device, and has the advantages of simple operation, labor saving, fast adjustment and long service life.

[0021] The present application also provides a bicycle, comprising: the above-mentioned bicycle seat tube assembly; and a saddle fixed on the inner tube.

[0022] The bicycle can quickly adjust the saddle height by turning the handle, which is suitable for various needs of users and has the advantages of simple operation, labor saving, fast adjustment and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a quick release device in one embodiment;

[0024] Figure 2 is a front view of a quick release device in one embodiment;

[0025] Figure 3 is a schematic diagram of the position of a double-headed golf club when the handle is locked in one embodiment;

[0026] Figure 4 is an exploded view of a handle, a clamp arm and a double-ended club in one embodiment;

[0027] Figure 5 A schematic diagram of the structure of a locking mechanism and a snap ring of a quick release device in one embodiment;

[0028] Figure 6 is a schematic structural diagram of a locking mechanism in one embodiment;

[0029] Figure 7 A schematic diagram of a clamp ring, a bushing, an inner tube and an outer tube in one embodiment;

[0030] Figure 8 It is a schematic structural diagram of a bushing in one embodiment.

[0031] In the figure: 1, seat tube; 11, outer tube; 111, first end; 112, notch; 12, inner tube; 2, clamp ring; 21, ring body; 22, clamp arm; 221, clamp arm body; 222, first rotating mechanism; 2221, first base; 2222, first cover plate; 2223, first fixing member; 2224, first mounting groove; 2225, first protrusion; 2226, first ball groove; 2227, first through groove; 3, fixed shaft; O-O', axis; 31, fixed end; 32, movable End; 33, adjusting nut; 4, handle; 41, handle body; 42, second rotating mechanism; 421, second base; 422, second cover plate; 423, second fixing member; 425, second protrusion; 426, second ball groove; 427, second through groove; 5, double-headed ball rod; 6, locking mechanism; 61, bracket; 62, shaft; 63, hook; 64, button; 65, reset torsion spring; 7, retaining ring; 8, bushing; 81, annular portion; 82, fan-shaped portion; 821, protrusion; 811, through groove. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0036] In a first embodiment of the present invention, a bicycle seat tube quick release device is provided. Figure 1As shown, it is arranged on the seat tube 1 of the bicycle, and can loosen or clamp the seat tube 1. The user can adjust the height of the seat tube 1 when the seat tube 1 is loosened, and after adjusting to a suitable height, use the quick release device to lock the seat tube 1 and use the bicycle.

[0037] like Figure 1 As shown, the bicycle seat tube quick release device comprises: a clamp ring 2, a fixed shaft 3, a handle 4 and a double-headed ball rod 5, wherein the clamp ring 2 comprises: a ring body 21 sleeved on the seat tube 1, a clamp arm 22 connected to the ring body 21, and two clamp arms 22 are formed and arranged in parallel. The fixed shaft 3 is passed through the clamp arm 22, and the handle 4 is rotatably connected to the fixed shaft 3 and can rotate around the fixed shaft 3. Both ends of the double-headed ball rod 5 are provided with a ball body, and the double-headed ball rod 5 is respectively spherically hinged with the handle 4 and the clamp arm 22 through the balls at both ends. When the handle 4 rotates around the fixed shaft 3, it will drive the double-headed ball rod 5 to swing, and generate displacement in the axial direction of the fixed shaft 3, pressing the clamp arm 22 to tighten the ring body 21 to tighten the seat tube 1, or loosening the clamp arm 22 to stretch the ring body 21 to loosen the seat tube 1.

[0038] like Figure 1 and Figure 2 As shown, the handle 4 rotates around the fixed axis 3, and the rotation axis coincides with the axis O-O' of the fixed axis 3, and the line connecting the hinge position of the double-headed ball rod 5 on the handle 4 and the hinge position of the double-headed ball rod 5 on the clamp arm 22 is set at an angle to the axis O-O', so when the handle 4 rotates, it will drive one end of the double-headed ball rod 5 to swing along a certain arc; at the same time, since the clamp arm 22 is fixed to the ring body 21, the end of the double-headed ball rod 5 that is ball-hinged on the clamp arm 22 will rotate on the clamp arm 22, and the position will not change. That is, when the handle 4 rotates, the double-headed ball rod 5 swings around the end that is ball-hinged on the clamp arm 22. The rod body of the double-headed ball rod 5 has a certain offset relative to the axis O-O' of the fixed shaft 3, forming an offset angle. The offset angle will change when the double-headed ball rod 5 swings. According to the Pythagorean theorem, when the rod body length of the double-headed ball rod 5 is constant, the smaller the angle with the axis O-O' of the fixed shaft 3, the longer the projection length of the double-headed ball rod 5 in the direction of the axis O-O'; the larger the angle with the axis O-O' of the fixed shaft 3, the shorter the projection length of the double-headed ball rod 5 in the direction of the axis O-O'. When the handle 4 is rotated, the angle between the double-headed ball rod 5 and the axis O-O' will change, thereby changing the projection length of the double-headed ball rod 5 in the direction of the axis O-O' to tighten or loosen the clamp arm 22. There can be multiple double-headed ball rods 5, and the rod bodies of each double-headed ball rod 5 are parallel to each other and swing synchronously to increase the clamping force.

[0039] When the handle 4 rotates around the fixed axis 3 along a first direction, the double-headed club 5 will swing in the direction of reducing the offset angle, and the projected length in the direction of the axis O-O' will increase to compress the clamp arm 22 and lock the seat tube 1; when the handle 4 rotates around the fixed axis 3 along a second direction, the double-headed club 5 will swing in the direction of increasing the offset angle, and the projected length in the direction of the axis O-O' will decrease to loosen the clamp arm 22 and release the seat tube 1, wherein the first direction is opposite to the second direction.

[0040] In this embodiment, the two ends of the double-headed ball rod 5 are respectively articulated with the clamp arm 22 and the handle 4, and the clamp arm 22 is clamped or released by adjusting the angle between the double-headed ball rod and the axis OO'. Therefore, after long-term use, even if the ball head is worn, as long as the ball head can still rotate normally, the angle between the double-headed ball rod and the axis OO' can still be adjusted, so that the seat tube 1 can still be accurately clamped or released. At the same time, the rod length of the double-headed ball rod 5 will not change due to wear, so even if the quick release mechanism is used for a long time, it can still accurately clamp or release the seat tube 1, and the service life is long.

[0041] It is worth noting that Figure 1 As shown, the seat tube 1 is generally arranged vertically, and the fixed axis 3 penetrating the clamp arm 22 is arranged horizontally, and the length direction of the force arm of the handle 4 is also perpendicular to the fixed axis 3. Obviously, the handle 4 will not be blocked by the seat tube 1 or the clamp ring 2 when rotating, so the arm length of the handle 4 can be set longer, making the process of pulling the handle 4 to loosen and lock the seat tube 1 more convenient and labor-saving. The first direction is to rotate upward relative to the fixed axis 3, and the second direction is to rotate downward relative to the fixed axis 3.

[0042] In this embodiment, both ends of the fixed shaft 3 in the length direction are provided with end heads, and the lever arm through which the handle 4 is rotatably connected to the fixed shaft 3 can be one or two. When there is one lever arm, the side of the lever arm away from the clamp arm 22 is against one end head, and when there are two lever arms, the two lever arms are respectively located on both sides of the clamp arm 22 and are respectively against the two end heads, and the end heads are used to limit the position of the handle 4 in the direction of the axis O-O', ensuring that the double-headed club 5 only pushes or releases the clamp arm 22, and the handle 4 will not move in the direction of the axis O-O', affecting the adjustment structure of the quick release device.

[0043] Among them, Figure 2 As shown, the ends of the fixed shaft 3 are respectively: a movable end 32 and a fixed end 31. The quick release device also includes: an adjusting nut 33 threadedly connected to the fixed shaft 3, the adjusting nut 33 abuts against the movable end 32, and is used to adjust the distance between the movable end 32 and the fixed end 31, so as to adjust the locking degree of the quick release device on the seat tube 1 to avoid locking failure.

[0044] The clamp arm 22 includes: a clamp arm body 221 connected to the ring body 21 and a first rotating mechanism 222 provided on the clamp arm body 221, the first rotating mechanism 222 is used to be ball-jointed with one end of the double-headed ball rod 5, and the handle 4 includes: a handle body 41 and a second rotating mechanism 42 provided on the handle body 41, the second rotating mechanism 42 is used to be ball-jointed with the other end of the double-headed ball rod 5. Of course, the double-headed ball rod 5 can also be directly ball-jointed with the clamp arm body 221 and the handle body 41. In this embodiment, only the ball-jointed connection between the clamp arm 22 and the double-headed ball rod 5, and the handle 4 and the double-headed ball rod 5 is realized by the first rotating mechanism 222 and the second rotating mechanism 42 as an example.

[0045] like Figure 4 As shown, the first rotating mechanism 222 includes: a first base 2221 connected to the clamp arm body 221, a first cover plate 2222 buckled on the first base 2221, and a first fixing member 2223 fixing the first cover plate 2222 on the first base 2221. The first base 2221 forms a first protrusion 2225 on the side facing the clamp arm body 221, and a first mounting groove 2224 is provided on the clamp arm body 221. The first protrusion 2225 is embedded in the first mounting groove 2224 to achieve the fixing of the clamp arm body 221 and the first rotating mechanism 222, so as to prevent the first rotating mechanism 222 from rotating. Among them, a plurality of first ball grooves 2226 are provided on the first base 2221, and a first through groove 2227 corresponding to each first ball groove 2226 is provided on the first cover plate 2222. The first fixing member 2223 is a rivet, which fixes the first base 2221 and the first cover plate 2222. In actual production, the ball head at one end of the double-headed ball rod 5 is heated to high temperature and pressed into the first through groove 2227 of the first cover plate 2222. The ball head enters the corresponding first ball groove 2226 through the first through groove 2227 to achieve ball articulation with the first ball groove 2226.

[0046] The second rotating mechanism 42 includes: a second base 421 connected to the handle body 41, a second cover plate 422 buckled on the second base 421, and a second fixing member 423 fixing the second cover plate 422 on the second base 421. The second base 421 forms a second protrusion 425 on the side facing the clamp arm body 221. The handle body 41 is provided with a second mounting groove (not shown in the figure, the position is opposite to the second protrusion 425), and the second protrusion 425 is embedded in the second mounting groove to achieve the fixation of the handle body 41 and the second rotating mechanism 42, so that the second rotating mechanism 42 can rotate synchronously with the handle body 41. Among them, the second base 4221 is provided with a plurality of second ball grooves 426, and the second cover plate 422 is provided with second through grooves 427 corresponding to each second ball groove 426. The second fixing member 423 is a rivet, and the second base 4221 and the second cover plate 422 are riveted and fixed. In actual production, similar to the first rotating mechanism 222, the ball head at one end of the double-headed ball rod 5 is heated to a high temperature, pressed into the second through slot 427 of the second cover plate 422, and the ball head enters the corresponding second ball groove 426 through the second through slot 4227 to achieve ball articulation with the second ball groove 426. Lubricating oil can be applied to each of the first ball groove 2226 and the second ball groove 426 to ensure smooth rotation of the double-headed ball rod 5. The ball articulation can achieve free rotation of the end of the double-headed ball rod 5 in the first ball groove 2226 or the second ball groove 426, and the double-headed ball rod 5 can swing in a large range. At the same time, a large part of the ball head of the double-headed ball rod 5 is hidden in the rotating mechanism and is not easy to rust. A small range of rust will appear on the exposed surface, which is easy to clean and does not affect the rotation of the ball articulation.

[0047] When the user is ready to adjust the seat post height, Figure 1 and Figure 2 As shown, the handle body 41 is rotated toward the second direction, that is, toward the top of the tie clamp ring 2, and the handle body 41 drives the second rotating mechanism 42 to rotate. When the second rotating mechanism 42 rotates, it drives each double-headed ball rod 5 to swing, increasing the offset angle between the double-headed ball rod 5 and the axis O-O', so that the projection length of the double-headed ball rod 5 in the direction of the axis O-O' is reduced. Since the clamp arm 22 has a certain elastic force and is pressed by the double-headed ball rod 5, after the double-headed ball rod 5 is reduced in the direction of the axis O-O', the clamp arm 22 is relaxed, and the two clamp arms 22 rebound in a direction away from each other, thereby loosening the ring body 21 and releasing the clamping of the seat tube 1. The user can directly adjust the height of the seat tube 1.

[0048] After the height of the seat tube 1 is adjusted to an appropriate height, the handle body 41 is rotated along the first direction, that is, toward the bottom of the clamp ring 2. The handle body 41 drives the second rotating mechanism 42 to rotate. When the second rotating mechanism 42 rotates, it drives each double-headed ball rod 5 to swing, thereby reducing the offset angle between the double-headed ball rod 5 and the axis O-O', thereby increasing the projected length of the double-headed ball rod 5 in the axial direction and extending it to both sides. Since the handle body 41 abuts against the end of the fixed shaft 3 and the position is fixed, the double-headed ball rod 5 will push the first rotating mechanism 222 to press the clamp arm body 221, thereby locking the ring body 21, locking the seat tube 1, and locking the height of the seat tube 1.

[0049] It is worth noting that after locking the seat tube 1, in order to prevent the double-headed club 5 from rotating again and thus unlocking the seat tube 1, as shown in FIG. Figure 5 As shown, the handle 4 is also provided with a locking mechanism 6. When the handle 4 is rotated in the first direction to the extreme position and close to the seat tube 1, the locking mechanism 6 locks the handle 4 on the seat tube 1. Figure 3 At this time, the double-headed ball rod 5 is parallel to the axis OO' of the fixed shaft 3, and the clamp ring 2 is clamped to the tightest.

[0050] like Figure 5 and Figure 6 As shown, the locking mechanism 6 includes: a bracket 61 provided at the gripping end of the handle 4, a shaft 62 provided in the bracket 61, a hook 63 rotatably provided on the shaft 62, a button 64 for pushing the hook 63, and a reset torsion spring 65 connected between the bracket 61 and the hook 63. The seat tube 1 has a clamping position, which can be a structure such as a clamping groove or a clamping ring 7 formed on the seat tube 1. In this embodiment, the clamping position is a clamping ring 7 provided on the seat tube 1. When the handle 4 rotates to the extreme position along the first direction, the hook 63 can be directly clamped into the clamping ring 7. The handle 4 is fixed on the seat tube 1, ensuring that the seat tube 1 is always clamped when the user rides, thereby ensuring riding safety. The button 64 is provided on the side of the handle 4 away from the seat tube 1. Pressing the button 64 can push the hook 63 to rotate around the shaft 62, disengage the clamping ring 7, and lift the handle 4. One end of the return torsion spring 65 is hooked on the bracket 61 , and the other end is hooked on the hook 63 . When the button 64 is released, the hook 63 can return to its original position under the action of the return torsion spring 65 .

[0051] A second embodiment of the present application relates to a bicycle seat tube assembly, such as Figure 7As shown, it includes: an outer tube 11, an inner tube 12 and a bicycle seat tube quick release device as in the first embodiment, wherein the uppermost end of the outer tube 11 is a first end 111, the inner tube 12 penetrates into the outer tube 11 from the first end 111, the quick release device is arranged on the first end 111 of the outer tube 11, and the outer tube 11 has a notch 112 at the first end 111. When the clamp ring 2 of the quick release device clamps the outer tube 11, the outer tube 11 contracts toward the notch 112, and the inner tube 12 is clamped and locked; when the outer tube 11 is released, the inner tube 12 can move up and down to adjust the height of the bicycle seat.

[0052] In the seat tube assembly, the clamp ring 2 is used to clamp and fix the inner tube 12 through the outer tube 11. The outer diameter of the outer tube 11 is required to be relatively high. In order to avoid the size problem of the outer tube 11 caused by manufacturing errors, the bicycle seat tube assembly also includes: a bushing 8 sleeved on the inner ring, combined with Figure 7 and Figure 8 The bushing 8 includes: an annular portion 81, and a plurality of fan-shaped portions 82 arranged around the annular portion 81. The annular portion 81 is sleeved with the inner tube 12, and each fan-shaped portion 82 abuts against the inner wall of the outer tube 11. The bushing 8 can open the outer tube 11 to ensure the position of the outer tube 11 in the clamp ring 2. Each fan-shaped portion 82 transmits the force of the outer tube 11 to the annular portion 81 to press the inner tube 12. The fan-shaped portions 82 are all hollow to reduce costs. The uppermost end of the fan-shaped portion 82 extends radially to form a protrusion 821, which is placed on the first end 111 of the outer tube 11 to prevent the bushing 8 from falling into the outer tube 11.

[0053] At the same time, since the outer tube 11 shrinks toward the notch 112 when squeezed, a through groove 811 is also provided on the annular portion 81, and the through groove 811 divides the annular portion 81 along the axis OO' direction of the annular portion 81, so that the bushing 8 can shrink toward the through groove 811 to better clamp and release the inner tube 12.

[0054] The seat tube assembly can quickly and conveniently adjust the height of the inner tube 12 through a quick release device, and has the advantages of simple operation, labor saving, fast adjustment and long service life.

[0055] The third embodiment of the present application relates to a bicycle, including a bicycle seat tube assembly and a saddle as described in the second embodiment. The saddle is fixed on the inner tube. The saddle height can be quickly adjusted by turning the handle to meet the needs of various users. It has the advantages of simple operation, labor saving, fast adjustment and long service life.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A bicycle seat tube quick release device, characterized in that: include: The harness clamp ring comprises a ring body sleeved on the seat tube and a clamp arm connected to the ring body; A fixed shaft, passing through the clamp arm; A handle, rotatably connected to the fixed shaft; A double-headed ball rod, both ends of which are respectively hinged to the clamp arm and the handle ball, the double-headed ball rod forms an offset angle relative to the axis of the fixed axis, when the handle rotates around the fixed axis in a first direction, the double-headed ball rod swings in a direction to reduce the offset angle, and presses the clamp arm; when the handle rotates around the fixed axis in a second direction, the double-headed ball rod swings in a direction to increase the offset angle, and loosens the clamp arm; The clamp arm comprises: a clamp arm body connected to the ring body, a first rotating mechanism arranged on the clamp arm body, the fixed shaft passes through the first rotating mechanism, and the first rotating mechanism is ball-hinged with one end of the double-headed ball rod; The first rotating mechanism comprises: a first base connected to the clamp arm body, a first cover plate buckled on the first base, and a first fixing member fixing the first cover plate on the first base, a first ball groove is provided on the first base, a first through groove is provided on the first cover plate, and an end of the double-headed ball rod close to the first rotating mechanism enters the first ball groove through the first through groove; The first direction is a rotation toward the upper side relative to the fixed axis, and the second direction is a rotation toward the lower side relative to the fixed axis.

2. The bicycle seat tube quick release device according to claim 1, characterized in that: A first protrusion is formed on a side of the first base facing the clamp arm body, and a first mounting groove for the first protrusion to be embedded in is formed on the clamp arm body.

3. The bicycle seat tube quick release device according to claim 1, characterized in that: The handle comprises: a handle body, a second rotating mechanism arranged on the handle body and facing the clamp arm, the fixed shaft passes through the second rotating mechanism, and the second rotating mechanism is hinged to a ball at one end of the double-headed club.

4. The bicycle seat tube quick release device according to claim 3, characterized in that: The second rotating mechanism includes: a second base connected to the handle body, a second cover plate buckled on the second base, and a second fixing member fixing the second cover plate on the second base, a second ball groove is opened on the second base, and a second through groove is provided on the second cover plate, and one end of the double-headed ball rod close to the second rotating mechanism enters the second ball groove through the second through groove.

5. The bicycle seat tube quick release device according to claim 4, characterized in that: A second protrusion is formed on a side of the second base facing the handle body, and a second installation groove for the second protrusion to be embedded in is formed on the handle body.

6. The bicycle seat tube quick release device according to claim 1, characterized in that: Ends are respectively provided at both ends of the fixed shaft in the length direction, and the handle has at least one force arm rotatably connected to the fixed shaft, and a side of the force arm away from the clamp arm abuts against one of the end heads.

7. The bicycle seat tube quick release device according to claim 6, characterized in that: The ends of the fixed shaft are respectively a movable end and a fixed end. The bicycle seat tube quick release device also includes an adjusting nut which is threadedly connected to the fixed shaft and abuts against the movable end.

8. The bicycle seat tube quick release device according to claim 1, characterized in that: The bicycle seat tube quick release device further comprises: a locking mechanism, which is arranged on the handle and is used to lock the handle on the seat tube when the handle is rotated to an extreme position along the first direction.

9. The bicycle seat tube quick release device according to claim 8, characterized in that: The locking mechanism includes: a bracket arranged at the gripping end of the handle, a shaft arranged in the bracket, a hook rotatably arranged on the shaft, and a button for pushing the hook, the hook is used to snap into a snap-in position on the seat tube, and the button is used to push the hook out of the snap-in position.

10. The bicycle seat tube quick release device according to claim 9, characterized in that: The locking mechanism further includes: a return torsion spring which is sleeved on the shaft and connected between the hook and the bracket.

11. A bicycle seat tube assembly, characterized in that: include: An outer tube having a first end, an inner tube inserted into the outer tube from the first end of the outer tube, and a bicycle seat tube quick release device as described in any one of claims 1 to 10, wherein the first end of the outer tube is provided with a notch, and the ring body of the clamp ring is fixed to the first end of the outer tube.

12. A bicycle, characterized in that: include: The bicycle seat tube assembly according to claim 11; The saddle is fixed on the inner tube.

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