Rotary lifting adjusting mechanism for handlebar stem of bicycle

Abstract

The utility model discloses a bicycle stem rotary lifting adjusting mechanism which comprises a pipe body, a partition baffle, an air spring, a rotary joint, a bolt nut and a handle, the pipe body is hollow, the partition baffle which is integrally formed is arranged in the middle of the inner wall of the pipe body, and the air spring is arranged in the upper section of the pipe body. The lower end of the gas spring is coaxially locked on the partition baffle through a screw, the upper end of the gas spring extends out of the pipe body and is integrally connected with the rotary joint, and the rotary joint is movably connected with one end of the handle through a pair of mutually locked bolt and nut. By means of the mode, the rotary lifting adjusting mechanism for the handlebar stem of the bicycle is provided, due to the fact that the air spring is adopted, the lifting operation difficulty is reduced, meanwhile, the shaft sleeve with the meshing tooth face is additionally arranged on the cover plate to lock the tooth-shaped hole wall on the rotary joint, the cover plate is meshed with the handlebar and the rotary joint at the same time, and therefore the rotating effect is improved. The double-limiting purpose is achieved, the service life is effectively prolonged, and reliability is high.

Description

Technical Field

[0001] The utility model relates to the field of bicycle parts, in particular to a bicycle handlebar rotation lifting and lowering adjustment mechanism. Background Art

[0002] In order to adapt to the grip needs of users of different body shapes, the handlebars of bicycles are designed with stems that can be raised or lowered or rotated.

[0003] Among them, the raising and lowering of the stem is generally achieved by clamp locking or thread tightening. The adjustment process generally requires forceful unlocking and locking. The adjustment accuracy is difficult to control, and the operation method is relatively cumbersome. The locking mechanism generally has problems such as rust and jamming, and requires regular maintenance.

[0004] In addition, common technical methods generally use a ring-shaped cover plate and handle teeth meshing to achieve the rotation adjustment and locking position of the stem. This method is prone to tooth surface wear, resulting in a shortened service life, and the handle will wobble due to the clearance. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a bicycle handlebar rotation and lifting adjustment mechanism. Due to the use of a gas spring, the difficulty of the lifting operation is reduced. At the same time, a shaft sleeve with an engaging tooth surface is added to the cover plate to lock the toothed hole wall on the rotating joint, so that the cover plate engages the handle and the rotating joint at the same time, achieving a dual limit purpose, effectively extending the service life, and having high reliability.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a bicycle handlebar rotation and lifting adjustment mechanism, including a tube body, a partition baffle, a gas spring, a rotary joint, bolts and nuts, and a handle. The tube body is hollow and an integrally formed partition baffle is provided in the middle of the inner wall. A gas spring is built into the upper part of the tube body. The lower end of the gas spring is coaxially locked on the partition baffle by a screw. The upper end of the gas spring extends out of the tube body and is integrally connected to the rotary joint. The rotary joint is movably connected to one end of the handle through a pair of mutually locked bolts and nuts. A handle clamp is provided at the other end of the handle.

[0007] In a preferred embodiment of the present invention, the upper end of the tube body is threadedly connected to an upper cover, the upper cover has a coaxial opening and is pre-embedded with an O-ring, and the O-ring is interference-fitted on the outer circumference of the gas spring.

[0008] In a preferred embodiment of the present invention, the upper and lower surfaces of the partition baffle are respectively provided with a shock-absorbing gasket and a locking gasket press-connected by screws, and the shock-absorbing gasket contacts the lower end surface of the gas spring.

[0009] In a preferred embodiment of the present invention, the upper end of the gas spring includes a height adjustment valve, the lower end of the rotary joint is provided with an operating cavity matching the height adjustment valve, the lower edge of the rotary joint is provided with a rotating shaft bracket, and the rotating shaft bracket is externally connected to a valve pull rod, and the valve pull rod extends into the operating cavity and contacts the top of the height adjustment valve.

[0010] In a preferred embodiment of the present invention, a lower sealing cover is threadedly connected to the inner wall of the lower section of the tube body, and a high-strength rubber pad is provided between the lower sealing cover and the screw.

[0011] In a preferred embodiment of the present invention, the partition baffle separates the inner wall of the tube body into an upper cavity and a lower cavity, the upper cavity is in the shape of a hexagonal prism, the upper end of the upper cavity is inlaid with a hexagonal upper guide sleeve, and the outer wall of the gas spring is coaxially installed with a hexagonal lower guide sleeve, and the upper guide sleeve and the lower guide sleeve are both fitted in the inner wall of the tube body.

[0012] In a preferred embodiment of the present invention, the rotary joint is horizontally opened and provided with a serrated hole wall, the handle end is provided with a U-shaped notch and a pair of rotating shaft supports that cooperate with the rotary joint are formed on both sides of the notch, the rotating shaft supports are horizontally opened and coaxially aligned with the serrated hole wall, the rotating shaft supports are symmetrically provided with crimping grooves on the outside, a cover plate is assembled in the crimping groove, a countersunk hole is provided in the center of the cover plate, and the bolts and nuts are locked with each other through the countersunk hole.

[0013] In a preferred embodiment of the present invention, a circle of inner bevel teeth is provided around the side wall of the crimping groove, and a circle of outer bevel teeth matching the inner bevel teeth is provided at the edge of the cover plate.

[0014] In a preferred embodiment of the present invention, the bolt and nut are composed of a locking bolt and an internally threaded sleeve, the outer wall of the internally threaded sleeve is in the shape of a smooth axis, and the internally threaded sleeve and the locking bolt are both provided with bolt heads matching the countersunk holes; an integrally formed sleeve is provided on one side of the cover plate, the internally threaded sleeve is passed through the sleeve, and the outer wall of the sleeve is provided with an engaging tooth surface that engages with the toothed hole wall, and the bolt and nut are pressed against the cover plate in a locking manner so that the internal bevel teeth engage with the external bevel teeth to lock the sleeve and fix the handle.

[0015] In a preferred embodiment of the present invention, a locking protrusion is provided at the connection point between the internally threaded sleeve and the bolt head, and a slot matching the locking protrusion is provided on the cover plate.

[0016] The beneficial effects of the present invention are as follows: the present invention provides a bicycle handlebar rotation and lifting adjustment mechanism, which reduces the difficulty of lifting operation due to the use of a gas spring, and at the same time locks the toothed hole wall on the rotating joint by adding a shaft sleeve with an engaging tooth surface on the cover plate, so that the cover plate engages the handle and the rotating joint at the same time, achieving a dual limiting purpose, effectively extending the service life, and having high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0018] Figure 1 This is the overall appearance and partial cross-sectional structure diagram of a bicycle handlebar rotation and lifting adjustment mechanism of the utility model;

[0019] Figure 2 This is an exploded view of the parts of a bicycle handlebar rotation and lifting adjustment mechanism of the utility model;

[0020] Figure 3 This is a partial enlarged structural diagram of a valve pull rod of a bicycle handlebar rotation and lifting adjustment mechanism of the utility model;

[0021] Figure 4 This is a structural diagram of a rotating joint of a bicycle handlebar rotating lifting and adjusting mechanism of the present invention;

[0022] Figure 5 This is a cross-sectional view of a handle of a bicycle handlebar rotation and lifting adjustment mechanism of the present invention;

[0023] Figure 6 This is an overall structural diagram of a bicycle handlebar rotation and lifting adjustment mechanism in the raised state and the upward rotation state;

[0024] Figure 7 The utility model is a partially enlarged structural diagram of an upper cover of a bicycle handlebar rotation and lifting adjustment mechanism. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1-6 As shown, the embodiment of the utility model includes:

[0027] A bicycle handlebar rotation and lifting adjustment mechanism includes a tube body 1, a partition baffle 2, a gas spring 3, a rotary joint 4, bolts and nuts 5, and a handle 6. The tube body 1 is hollow and an integrally formed partition baffle 2 is provided in the middle of the inner wall. The gas spring 3 is built into the upper section of the tube body 1. The lower end of the gas spring 3 is coaxially locked on the partition baffle 2 by a screw 7. The upper end of the gas spring 3 extends out of the tube body 1 and is integrally connected to the rotary joint 4. The rotary joint 4 is movably connected to one end of the handle 6 by a pair of mutually locked bolts and nuts 5. The other end of the handle 6 is provided with a handle clamp 8.

[0028] The upper end of the tube body 1 is threadedly connected to an upper cover 9 , the upper cover 9 has a coaxial opening and is pre-buried with an O-ring 10 , and the O-ring 10 is interference-fitted on the outer circumference of the gas spring 3 .

[0029] Furthermore, a shock-absorbing washer 11 and a locking washer 12 which are press-connected by screws 7 are respectively provided on the upper and lower surfaces of the partition baffle 2 , and the shock-absorbing washer 11 contacts the lower end surface of the gas spring 3 .

[0030] Furthermore, the upper end of the gas spring 3 includes a height adjustment valve, and the lower end of the rotary joint 4 is provided with an operating cavity 13 matching the height adjustment valve. The lower edge of the rotary joint 4 is provided with a rotating shaft bracket 14, and the rotating shaft bracket 14 is externally connected to a valve pull rod 15. The valve pull rod 15 extends into the operating cavity 13 and contacts the top of the height adjustment valve.

[0031] Furthermore, a lower cover 16 is threadedly connected to the inner wall of the lower section of the tube body 1 , and a high-strength rubber pad 17 is provided between the lower cover 16 and the screw 7 .

[0032] Furthermore, the partition baffle 2 separates the inner wall of the tube body 1 into an upper cavity 18 and a lower cavity 19. The upper cavity 18 is in the shape of a hexagonal prism, and the upper end of the upper cavity 18 is inlaid with a hexagonal upper guide sleeve 30. The outer wall of the gas spring 3 is coaxially installed with a hexagonal lower guide sleeve 31. The upper guide sleeve 30 and the lower guide sleeve 31 are both fitted on the inner wall of the tube body 1.

[0033] Furthermore, the rotary joint 4 is horizontally opened and provided with a serrated hole wall 32, the end of the handle 6 is provided with a U-shaped notch 33 and a pair of rotating shaft supports 34 that cooperate with the rotary joint 4 are formed on both sides of the notch 33, the rotating shaft supports 34 are horizontally opened and coaxially aligned with the serrated hole wall 32, and the outer side of the rotating shaft supports 34 are symmetrically provided with crimping grooves 35, and a cover plate 36 is assembled in the crimping groove 35, and a countersunk hole 37 is provided in the center of the cover plate 36, and the bolts and nuts 5 are locked with each other through the countersunk hole 37.

[0034] Furthermore, a circle of inner bevel teeth 56 is provided around the side wall of the crimping groove 35 , and a circle of outer bevel teeth 57 matching the inner bevel teeth 56 is provided at the edge of the cover plate 36 .

[0035] Furthermore, the bolt and nut 5 consists of a locking bolt 51 and an internally threaded sleeve 52. The outer wall of the internally threaded sleeve 52 is in the shape of a smooth axis. Both the internally threaded sleeve 52 and the locking bolt 51 have a bolt head 53 that matches the countersunk hole 37. An integrally formed sleeve 54 is provided on one side of the cover plate 36. The internally threaded sleeve 52 is inserted into the sleeve 54. The outer wall of the sleeve 54 is provided with an engaging tooth surface 55 that engages with the toothed hole wall 32. The bolt and nut 5 presses the cover plate 36 in a locking manner, so that the internal bevel teeth 56 engage with the external bevel teeth 57 to lock the sleeve 54 and fix the handle 6.

[0036] Furthermore, a locking protrusion 58 is provided at the connection point between the internally threaded sleeve 52 and the bolt head 53 , and a slot matching the locking protrusion 58 is provided on the cover plate 36 .

[0037] This product can realize the lifting and lowering adjustment of the handle, which is very easy to operate. You only need to manually turn the valve rod 15, and the gas spring 3 will extend to raise the handle 6. If you need to lower the height of the handle 6, you only need to press the handle 100 on the handle 6 after turning the valve rod 15.

[0038] On this basis, the vibration reduction and noise reduction during driving are achieved by setting up high-strength rubber pads 17 and shock-absorbing gaskets 11, and a hexagonal guide sleeve is set to prevent it from loosening and rotating, and a pair of upper and lower covers are used to provide dust protection.

[0039] This product also allows for rotational adjustment of the stem, with a very secure locking mechanism. First, remove the bolts and nuts 5, then pull out the cover plate 36. Next, adjust the angle between the handle 6 and the gas spring 3 as needed. Once adjustment is complete, replace the sleeve 54 on the cover plate 36, allowing the engaging tooth surfaces 55 on the sleeve 54 to engage and tighten with the toothed hole walls 32 on the rotary joint 4 to secure the angle. Once the angle is adjusted, continue pressing the rotary pressure plate inward until the outer bevel teeth 57 engage the inner bevel teeth 56. Finally, insert the locking bolt 51 and the internally threaded sleeve 52 through the sleeve 54 to complete the locking and tighten the rotary joint 4.

[0040] Two levels of meshing are specifically designed here: the meshing relationship between the occlusal tooth surface 55 and the toothed hole wall 32, and the meshing relationship between the inner bevel teeth 56 and the outer bevel teeth 57. Compared with the traditional single-tooth meshing locking method, this product simultaneously distributes external stress to the handle 6, the rotary joint 4, the sleeve 54, and the cover plate 36, thereby greatly improving the reliability of the handle 6.

[0041] In summary, the utility model provides a bicycle handlebar rotation and lifting adjustment mechanism. Due to the use of a gas spring 3, the difficulty of the lifting operation is reduced. At the same time, the sleeve 54 with an engaging tooth surface 55 added to the cover plate 36 is used to lock the serrated hole wall 32 on the rotary joint 4, so that the cover plate 36 engages the handle 6 and the rotary joint 4 at the same time, achieving a dual limiting purpose, effectively extending the service life, and having high reliability.

[0042] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A bicycle handlebar rotation and lifting adjustment mechanism, characterized in that: It includes a tube body, a partition baffle, a gas spring, a rotary joint, bolts and nuts, and a handle. The tube body is hollow and an integrally formed partition baffle is provided in the middle of the inner wall. A gas spring is built into the upper part of the tube body. The lower end of the gas spring is coaxially locked on the partition baffle by a screw. The upper end of the gas spring extends out of the tube body and is integrally connected to the rotary joint. The rotary joint is movably connected to one end of the handle through a pair of mutually locked bolts and nuts. A handle clamp is provided at the other end of the handle.

2. The bicycle handlebar rotation and lifting adjustment mechanism according to claim 1, wherein: The upper end of the tube body is threadedly connected with an upper cover, the upper cover has a coaxial opening and is pre-buried with an O-ring, and the O-ring is interference-fitted on the outer peripheral surface of the gas spring.

3. The bicycle handlebar rotation and lifting adjustment mechanism according to claim 1, characterized in that: A shock-absorbing washer and a locking washer which are press-connected by screws are respectively provided on the upper and lower surfaces of the partition baffle, and the shock-absorbing washer contacts the lower end surface of the gas spring.

4. The bicycle handlebar rotation and lifting adjustment mechanism according to claim 1, characterized in that: The upper end of the gas spring includes a height adjustment valve, the lower end of the rotary joint is provided with an operating cavity matching the height adjustment valve, the lower edge of the rotary joint is provided with a rotating shaft bracket, the rotating shaft bracket is externally connected to a valve pull rod, the valve pull rod extends into the operating cavity and contacts the top of the height adjustment valve.

5. The bicycle handlebar rotation and lifting adjustment mechanism according to claim 1, characterized in that: The inner wall of the lower section of the tube body is threadedly connected with a lower cover, and a high-strength rubber pad is provided between the lower cover and the screw.

6. The bicycle handlebar rotation and lifting adjustment mechanism according to claim 1, characterized in that: The partition baffle separates the inner wall of the tube body into an upper cavity and a lower cavity. The upper cavity is in the shape of a hexagonal prism. The upper end of the upper cavity is inlaid with a hexagonal upper guide sleeve. The outer wall of the gas spring is coaxially mounted with a hexagonal lower guide sleeve. The upper guide sleeve and the lower guide sleeve are both fitted into the inner wall of the tube body.

7. The bicycle handlebar rotation and lifting adjustment mechanism according to claim 1, characterized in that: The rotary joint is horizontally opened and provided with a serrated hole wall. The end of the handle is provided with a U-shaped notch and a pair of rotating shaft supports that cooperate with the rotary joint are formed on both sides of the notch. The rotating shaft supports are horizontally opened and coaxially aligned with the serrated hole wall. The outer side of the rotating shaft supports are symmetrically provided with crimping grooves, and a cover plate is assembled in the crimping groove. A countersunk hole is provided in the center of the cover plate, and the bolts and nuts are locked with each other through the countersunk hole.

8. The bicycle handlebar rotation and lifting adjustment mechanism according to claim 7, characterized in that: A circle of inner bevel teeth is provided around the side wall of the crimping groove, and a circle of outer bevel teeth matching the inner bevel teeth is provided at the edge of the cover plate.

9. The bicycle handlebar rotation and lifting adjustment mechanism according to claim 7, characterized in that: The bolt and nut consist of a locking bolt and an internally threaded sleeve. The outer wall of the internally threaded sleeve is in the shape of a smooth axis. Both the internally threaded sleeve and the locking bolt have bolt heads that match the countersunk holes. An integrally formed sleeve is provided on one side of the cover plate. The internally threaded sleeve is inserted into the sleeve. The outer wall of the sleeve is provided with an engaging tooth surface that engages with the toothed hole wall. The bolt and nut press the cover plate in a locking manner so that the internal bevel teeth engage with the external bevel teeth to lock the sleeve and fix the handle.

10. The bicycle handlebar rotation and lifting adjustment mechanism according to claim 9, characterized in that: A locking protrusion is provided at the connection point between the internal thread sleeve and the bolt head, and a slot matching the locking protrusion is provided on the cover plate.

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