Hoop clamping device and frame middle tube seat post height adjusting structure

Abstract

The utility model provides a hoop clamping device and a frame middle tube seat post height adjusting structure. The hoop clamping device comprises a hoop, a first adjusting protruding block, a second adjusting protruding block, a first limiting piece, a first guiding part, a locking handle and a connecting piece. When the handle part turns over back and forth at a certain turning angle, each first ball clamping groove is driven to rotate and switch between the position directly facing the surface of a first guide surface and the position corresponding to a first spiral guide groove, so that each first adjusting ball enables a first rotating part to abut against and loosen a first adjusting convex block; therefore, the hoop is switched between a pressing state and a loosening state. According to the hoop clamping device, the number of parts of a transmission mechanism which is connected with the locking handle and used for unlocking or locking the inner side movable part (such as a seat post) is small, and the overall structural layout and the mechanism linkage mode are simple. The cost of the frame middle tube seat post height adjusting structure using the hoop clamping device is reduced, and the reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of bicycle, electric vehicle and scooter application technology, and in particular to a clamping device and a frame center tube seat height adjustment structure using the same. Background Technology

[0002] my country is undoubtedly a major country in bicycles and electric bikes, with various types of bicycles, electric bikes, and scooters being widely used. Among these, bicycles, electric bikes, and scooters utilize a seatpost height adjustment mechanism. Because the seatpost height can be adjusted relative to the frame's center tube (lifting / extending), it offers advantages such as strong adaptability to riders of different heights and builds, and high vehicle versatility. It is especially suitable for shared bicycles and electric bikes, and has become a very important type of bicycle, electric bike, and scooter, with an increasingly popular trend.

[0003] Existing frame center tube seatpost height adjustment mechanisms typically employ a lever to unlock or lock the seatpost, allowing it to rise / fall / extend or lock relative to the center tube. However, the transmission mechanism connecting the existing frame center tube seatpost height adjustment mechanism to the lever for unlocking or locking the seatpost has a large number of components, resulting in a complex overall structural layout and linkage method. This leads to high cost and low reliability for the frame center tube seatpost height adjustment mechanism. Utility Model Content

[0004] This utility model proposes a clamping device and a frame center tube seat height adjustment structure using the same, in order to solve the technical problem that the transmission mechanism of the existing frame center tube seat height adjustment structure is complex, resulting in high cost and low reliability of the frame center tube seat height adjustment structure.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a clamping device, including:

[0007] Hoop;

[0008] The first adjusting protrusion and the second adjusting protrusion are respectively located on both sides of the deformation notch of the clamp, and the first adjusting protrusion and the second adjusting protrusion are respectively provided with the first adjusting hole and the second adjusting hole;

[0009] The first limiting component includes:

[0010] The first connecting part has one end as a first plug-in end that matches the first adjusting hole. The first connecting part is connected to the first adjusting hole through the first plug-in end on the side of the first adjusting protrusion facing away from the second adjusting protrusion.

[0011] A first guide portion is provided at the other end of the first connecting portion away from the first plug-in end. The first guide portion has a first guide surface surrounding the first connecting portion on the side facing the first connecting portion. At least two first spiral guide grooves are evenly spaced along the circumference of the first connecting portion.

[0012] The first connecting hole is provided on the first limiting member and matches the first adjusting hole;

[0013] Locking handle, including:

[0014] A first rotating part and a handle part provided on the first rotating part. The first rotating part is rotatably sleeved on the first connecting part and abuts against the side of the first adjusting protrusion facing away from the second adjusting protrusion. The end of the first rotating part facing away from the first adjusting protrusion is provided with a first rotating surface that surrounds the first connecting part and is spaced apart from the first guiding surface. At least two first ball grooves that match the first spiral guide groove are evenly spaced along the circumference of the first connecting part. At least two first adjusting balls abut against the corresponding first ball groove and the first guiding part respectively.

[0015] A connector is inserted into the first connecting hole and the second adjusting hole to limit the distance between the first limiting member and the second limiting member;

[0016] When the handle rotates back and forth at a certain angle, it drives each of the first ball bearing slots to rotate and switch between the positions facing the first guide surface and the corresponding first spiral guide groove, so that each of the first adjusting balls presses against and loosens the first adjusting protrusion of the first rotating part, thereby switching the clamp between the pressed state and the loose state.

[0017] Furthermore, the clamping device also includes:

[0018] The second limiting component includes:

[0019] The second connecting part has one end as a second plug-in end that matches the second adjusting hole. The second connecting part is connected to the second adjusting hole on the side of the second adjusting protrusion facing away from the first adjusting protrusion through the second plug-in end.

[0020] The second guide portion is located at the other end of the second connecting portion away from the second plug-in end. The side of the second guide portion facing the second connecting portion is provided with a second guide surface surrounding the second connecting portion. At least two second spiral guide grooves are evenly spaced along the circumference of the second connecting portion on the second guide surface, and the first spiral guide groove and the second spiral guide groove have opposite directions of rotation.

[0021] The second connecting hole is provided on the second limiting member and matches the second adjusting hole;

[0022] The locking handle also includes:

[0023] The second rotating part is integrated with the first rotating part via the handle part. The second rotating part is rotatably sleeved on the second connecting part and abuts against the side of the second adjusting protrusion facing away from the first adjusting protrusion. The end of the second rotating part facing away from the second adjusting protrusion is provided with a second rotating surface that surrounds the second connecting part and is spaced apart from the second guide surface. At least two second ball grooves that match the second spiral guide groove are evenly spaced along the circumference of the second connecting part. At least two second adjusting balls abut against the corresponding second ball grooves and the second guide part respectively.

[0024] The connector passes through the first connecting hole, the second connecting hole, and the second adjusting hole;

[0025] When the handle rotates back and forth at a certain angle, it also drives each of the second ball slots to rotate and switch between the positions facing the second guide surface and the corresponding second spiral guide groove, so that each of the second adjusting balls presses against and loosens the second adjusting protrusion of the second rotating part respectively.

[0026] Preferably, the lines connecting the lowest point at one end of the first spiral guide groove and the highest point at the other end of the first spiral guide groove to the axis of the first connecting part form a first central angle, and the lines connecting the lowest point at one end of the second spiral guide groove and the highest point at the other end of the second spiral guide groove to the axis of the second connecting part form a second central angle.

[0027] When the handle rotates back and forth at a rotation angle matching the first and second central angles, it causes each first ball bearing slot to rotate and switch between the highest point and the lowest point of the corresponding first spiral guide groove, and causes each second ball bearing slot to rotate and switch between the highest point of the corresponding second spiral guide groove and the lowest point of the corresponding second spiral guide groove.

[0028] Preferably, the number of the first spiral guide groove, the first ball groove, the first adjusting ball, the second spiral guide groove, the second ball groove, and the second adjusting ball are all 2 or 3, and the values ​​of the first central angle and the second central angle are both in the range of 30-120 degrees.

[0029] Preferably, both the first and second central angles are 90 degrees, and the handle can be flipped back and forth at a 90-degree angle between the horizontally extended extended state and the vertically downward retracted state.

[0030] Preferably, a first positioning groove is provided at the junction of the first guide surface and the highest point of the corresponding first spiral guide groove, and a second positioning groove is provided at the junction of the second guide surface and the highest point of the corresponding second spiral guide groove.

[0031] When the handle rotates back and forth at a rotation angle matching the first and second central angles, it causes each first ball bearing slot to rotate and switch between the lowest point of the corresponding first positioning groove and the corresponding first spiral guide groove, and causes each second ball bearing slot to rotate and switch between the lowest point of the corresponding second positioning groove and the corresponding second spiral guide groove. When the first ball bearing slot rotates to the highest point of the corresponding first spiral guide groove, the first adjusting ball bearing is engaged with the corresponding first positioning groove, and when the second ball bearing slot rotates to the highest point of the corresponding second spiral guide groove, the second adjusting ball bearing is engaged with the corresponding second positioning groove.

[0032] Preferably, both the first connecting portion and the second connecting portion are cylindrical, and the first guiding portion and the second guiding portion are respectively cylindrical with an outer diameter larger than that of the first connecting portion and the second connecting portion. The first guiding portion and the second guiding portion are respectively coaxially disposed at the other end of the first connecting portion and the second connecting portion opposite to the first plug-in end and the second plug-in end. Both the first guiding surface and the second guiding surface are annular.

[0033] Both the first rotating part and the second rotating part are cylindrical. The first rotating part and the second rotating part are respectively provided with a first hinge hole and a second hinge hole that match the shape of the first connecting part and the second connecting part. Both the first rotating surface and the second rotating surface are annular.

[0034] Preferably, the first rotating part and the second rotating part are respectively provided with a first relief platform and a second relief platform on the side opposite to the first adjusting protrusion and the second adjusting protrusion, which match the shape of the first guide part and the second guide part. The bottom surface of the first relief platform and the second relief platform are respectively provided with a first hinge hole and a second hinge hole that penetrate the first rotating part and the second rotating part. The bottom surface of the first relief platform and the second relief platform respectively forms a first rotating surface and a second rotating surface surrounding the first hinge hole and the second hinge hole.

[0035] Preferably, the clamp is C-shaped, the cross-section of the first adjustment hole and the second adjustment hole are both regular hexagonal, and the first insertion end and the second insertion end are regular hexagonal prisms that match the shape of the first adjustment hole and the second adjustment hole, respectively.

[0036] This utility model also provides a frame center tube seat post height adjustment structure, including a frame center tube and a seat post passing through the frame center tube, and also includes the above-mentioned clamping device, the clamp being located at the top of the frame center tube, the clamp being clamped in a pressed state and loosened in a relaxed state.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The clamping device provided by this utility model has fewer components in its transmission mechanism, which connects to the locking handle and is used to unlock or lock the inner moving part (such as the seat post). The overall structural layout and linkage method are simpler, reducing the cost and improving the reliability of the frame center tube seat post height adjustment structure using this clamping device. Furthermore, the clamping device can have a small number of additional transmission mechanism components added to improve the clamping and releasing effect on the inner moving part in both compressed and relaxed states, making it suitable for applications requiring high load-bearing capacity of the inner moving part. Therefore, the clamping device and the frame center tube seat post height adjustment structure using it are particularly suitable for mass application in shared bicycles, electric bicycles, and various portable bicycles, electric bicycles, and scooters. Attached Figure Description

[0039] To more clearly illustrate the technical solution proposed by this utility model, the present utility model will be described in detail below with reference to the embodiments and accompanying drawings. It should be understood that the embodiments and accompanying drawings described in the following detailed description are merely some embodiments of this utility model, and those skilled in the art can make changes to these drawings under the concept of this utility model.

[0040] Figure 1 A three-dimensional structural schematic diagram of Embodiment 1 of the clamping device provided by this utility model;

[0041] Figure 2 A front view of Embodiment 1 of the clamping device provided by this utility model;

[0042] Figure 3 A top view of a first embodiment of the clamping device provided by this utility model;

[0043] Figure 4 A side view of a first embodiment of the clamping device provided by this utility model;

[0044] Figure 5 An exploded structural diagram of Embodiment 1 of the clamping device provided by this utility model;

[0045] Figure 6 for Figure 1 A cross-sectional view of the clamping device in the middle;

[0046] Figure 7 A three-dimensional structural schematic diagram of Embodiment 2 of the clamping device provided by this utility model;

[0047] Figure 8 A front view of Embodiment 2 of the clamping device provided by this utility model;

[0048] Figure 9 A top view of Embodiment 2 of the clamping device provided by this utility model;

[0049] Figure 10 A side view of a second embodiment of the clamping device provided by this utility model;

[0050] Figure 11 An exploded structural diagram of Embodiment 2 of the clamping device provided by this utility model;

[0051] Figure 12 for Figure 7 A cross-sectional view of the clamping device in the middle;

[0052] Figure 13 for Figure 7 A three-dimensional structural diagram showing the clamping device integrated into the top of the frame's center tube;

[0053] Figure 14 for Figure 7 A schematic diagram of the main structure in which the clamping device is integrated into the top of the center tube of the frame;

[0054] Figure 15 for Figure 13 The locking handle of the clamping device in the middle is changed to a three-dimensional structure diagram showing that it flips up and down from the rear of the frame center tube.

[0055] The main markings in the attached figures are as follows:

[0056] 1. Clamp; 11. Deformation notch; 2. First adjusting protrusion; 21. First adjusting hole; 3. First limiting member; 31. First connecting part; 311. First insertion end; 32. First guide part; 321. First guide surface; 3211. First spiral guide groove; 3212. First positioning groove; 33. First connecting hole; 4. Locking handle; 41. First rotating part; 411. First rotating surface; 4111. First ball bearing groove; 412. First hinge hole; 413. First clearance countersunk platform; 42. First adjusting roller 43. Second rotating part; 431. Second rotating surface; 432. Second hinge hole; 433. Second clearance countersunk platform; 44. Second adjusting ball; 45. Handle part; 5. Connecting part; 6. Frame center tube; 61. Extension notch; 7. Second adjusting protrusion; 71. Second adjusting hole; 8. Second limiting part; 81. Second connecting part; 811. Second insertion end; 82. Second guide part; 821. Second guide surface; 8211. Second spiral guide groove; 8212. Second positioning groove; 83. Second connecting hole. Detailed Implementation

[0057] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer, the following description is provided in conjunction with the appendix. Figure 1-15 The present invention will be further described in detail with reference to the embodiments.

[0058] Please refer to the following: Figure 1-6 In Embodiment 1 of the clamping device provided by this utility model, the clamping device includes:

[0059] Clamp 1; First adjusting protrusion 2 and second adjusting protrusion 7 are respectively provided on both sides of the deformation notch 11 of clamp 1, and the first adjusting protrusion 2 and the second adjusting protrusion 7 are respectively provided with first adjusting hole 21 and second adjusting hole 71;

[0060] The first limiting member 3 includes:

[0061] The first connecting part 31 has one end as a first plug-in end 311 that matches the first adjusting hole 21. The first connecting part 31 is plugged into the first adjusting hole 21 on the side of the first adjusting protrusion 2 facing away from the second adjusting protrusion 7 through the first plug-in end 311.

[0062] A first guide portion 32 is provided at the other end of the first connecting portion 31 opposite to the first plug-in end 311. The side of the first guide portion 32 facing the first connecting portion 31 is provided with a first guide surface 321 surrounding the first connecting portion 31. At least two first spiral guide grooves 3211 are evenly spaced along the circumference of the first connecting portion 31. One end of the first spiral guide groove 3211 is the lowest point that sinks into the surface of the first guide surface 321, and the other end of the first spiral guide groove 3211 is the highest point that connects to the surface of the first guide surface 321. The first spiral guide groove 3211 extends spirally around the first connecting portion 31 along the circumference between its lowest point and its highest point.

[0063] The first connecting hole 33 is provided on the first limiting member 3 and matches the first adjusting hole 21;

[0064] Locking handle 4 includes:

[0065] The first rotating part 41 and the handle part 45 provided at one end of the first rotating part 41 are rotatably sleeved on the first connecting part 31 and abut against the side of the first adjusting protrusion 2 facing away from the second adjusting protrusion 7. The end of the first rotating part 41 facing away from the first adjusting protrusion 2 is provided with a first rotating surface 411 that surrounds the first connecting part 31 and is spaced apart from the first guide surface 321. At least two first ball grooves 4111 that match the first spiral guide groove 3211 are evenly spaced along the circumference of the first connecting part 31. At least two first adjusting balls 42 abut against the corresponding first ball grooves 4111 and the first guide part 32 respectively.

[0066] The connector 5 is inserted into the first connecting hole 33 and the second adjusting hole 71. The connector 5 is also coaxially inserted into the first adjusting hole 21 outside the first connecting hole 33. By adjusting the connector 5, the first limiting member 3 and the second limiting member 8 can be unlocked or locked to limit the distance (spacing) between the first limiting member 3 and the second limiting member 8.

[0067] When the user flips the handle 45 to rotate it back and forth at a certain angle, it can drive each of the first ball bearing slots 4111 to rotate back and forth between the positions facing the first guide surface 321 and the corresponding positions of the first spiral guide groove 3211. This causes each of the first adjusting balls 42 to roll into the first spiral guide groove 3211 along the first guide surface 321 and from the highest point of the first spiral guide groove 3211 to the lowest point of the first spiral guide groove 3211, or from the first spiral guide groove... The lowest point of 3211 rolls along the first spiral guide groove 3211 to the highest point of the first spiral guide groove 3211 and rolls out from the first spiral guide groove 3211 to contact the surface of the first guide surface 321, so as to press the first rotating part 41 against the first adjusting protrusion 2 and relax the first adjusting protrusion 2 respectively, thereby driving the first adjusting protrusion 2 to swing closer to or away from the second adjusting protrusion 7, thereby reducing or expanding the size of the deformation notch 11 of the clamp 1, so as to switch the clamp 1 between the pressed state of clamping the inner moving part and the relaxed state of relaxing the inner moving part.

[0068] The first embodiment of the clamping device provided by this utility model has fewer parts in the transmission mechanism that is connected to the locking handle 4 and used to unlock or lock the inner movable parts (such as the seat rod). The overall structural layout and mechanism linkage are simpler, which reduces the cost and improves the reliability of the seat rod height adjustment structure of the frame tube 6 using the clamping device. It is especially suitable for mass promotion and application in shared vehicles such as shared bicycles and electric vehicles.

[0069] Please refer to the following: Figure 7-15 In Embodiment 2 of the clamping device provided by this utility model, the clamping device further includes:

[0070] The second limiting member 8 includes:

[0071] The second connecting part 81 has one end as a second plug-in end 811 that matches the second adjusting hole 71. The second connecting part 81 is plugged into the second adjusting hole 71 on the side of the second adjusting protrusion 7 facing away from the first adjusting protrusion 2 through the second plug-in end 811.

[0072] The second guide portion 82 is located at the other end of the second connecting portion 81 opposite to the second insertion end 811. The side of the second guide portion 82 facing the second connecting portion 81 is provided with a second guide surface 821 surrounding the second connecting portion 81. At least two second spiral guide grooves 8211 are evenly spaced along the circumference of the second connecting portion 81 on the second guide surface 821. One end of the second spiral guide groove 8211 is the lowest point that sinks into the surface of the second guide surface 821, and the other end of the second spiral guide groove 8211 is the highest point that connects to the surface of the second guide surface 821. The first spiral guide groove 3211 and the second spiral guide groove 8211 have opposite directions of rotation (i.e., one is left-handed and the other is right-handed).

[0073] The second connecting hole 83 is provided on the second limiting member 8 and matches the second adjusting hole 71;

[0074] Locking handle 4 also includes:

[0075] The second rotating part 43 is integrated with the first rotating part 41 via the handle part 45. The second rotating part 43 is rotatably sleeved on the second connecting part 81 and abuts against the side of the second adjusting protrusion 7 facing away from the first adjusting protrusion 2. The end of the second rotating part 43 facing away from the second adjusting protrusion 7 is provided with a second rotating surface 431 that surrounds the second connecting part 81 and is spaced apart from the second guide surface 821. At least two second ball grooves (not shown in the figure) that match the second spiral guide groove 8211 are evenly spaced along the circumference of the second connecting part 81. At least two second adjusting balls 44 abut against the corresponding second ball grooves and the second guide part 82 respectively.

[0076] The aforementioned connector 5 passes through the first connecting hole 33, the first adjusting hole 21 outside the first connecting hole 33, the second connecting hole 83, and the second adjusting hole 71 outside the second connecting hole 83;

[0077] When the user flips the handle 45 to rotate it back and forth at a certain angle, it also causes each of the second ball bearing slots to rotate back and forth between the positions facing the second guide surface 821 and the corresponding positions of the second spiral guide groove 8211. This causes each of the second adjusting balls 44 to roll into the second spiral guide groove 8211 along the second guide surface 821 and from the highest point of the second spiral guide groove 8211 to the lowest point, or from the lowest point of the second spiral guide groove 8211 to the highest point. The second adjusting balls 44 roll out from the second spiral guide groove 8211 and contact the surface of the second guide surface 821, thereby pressing and releasing the second adjusting protrusion 7 against the second rotating part 43 respectively. This synchronizes with the reciprocating rotation of the first ball grooves 4111, causing the first adjusting balls 42 to press and release the first rotating part 41 against the first adjusting protrusion 2 respectively. While driving the first adjusting protrusion 2 to swing closer to or away from the second adjusting protrusion 7, it also drives the second adjusting protrusion 7 to swing closer to or away from the first adjusting protrusion 2, thereby improving the effect of reducing or expanding the deformation gap 11 of the clamp 1. Therefore, the second embodiment of the clamp clamping device provided by this utility model can improve the effect of clamping and releasing the inner moving part of the clamp 1 in both the pressed and relaxed states, while only increasing the number of transmission mechanism components by a small amount. This makes the clamp clamping device suitable for applications with high requirements for the load-bearing capacity of the inner moving part.

[0078] Please refer to the following: Figure 7-12 In Embodiment 2, the lines connecting the lowest point at one end of the first spiral guide groove 3211 and the highest point at the other end of the first spiral guide groove 3211 to the axis of the first connecting part 31 respectively form a first central angle (not shown in the figure), and the lines connecting the lowest point at one end of the second spiral guide groove 8211 and the highest point at the other end of the second spiral guide groove 8211 to the axis of the second connecting part 81 respectively form a second central angle (not shown in the figure).

[0079] When the user flips the handle 45 to rotate back and forth to match the rotation angle of the first and second central angles, it can drive each of the first ball bearing slots 4111 to rotate back and forth between the highest point and the lowest point of the corresponding first spiral guide groove 3211, and simultaneously drive each of the second ball bearing slots to rotate back and forth between the highest point of the corresponding second spiral guide groove 8211 and the lowest point of the corresponding second spiral guide groove 8211.

[0080] Please refer to the following: Figure 7-12In the preferred embodiment of the second embodiment, during the process of the connector 5 locking the first limiting member 3 and the second limiting member 8 and the handle part 45 reciprocating, each of the first ball grooves 4111 always remains directly opposite to each of the second ball grooves, and each of the first spiral guide grooves 3211 on the first connecting part 31 always remains directly opposite to each of the second spiral guide grooves 8211 on the second connecting part 81.

[0081] In other embodiments of Embodiment 2 (not shown in the figure), during the process of the connector 5 locking the first limiting member 3 and the second limiting member 8 and the handle part 45 reciprocating, each of the first ball grooves 4111 is always misaligned with each of the second ball grooves, and each of the first spiral guide grooves 3211 on the first connecting part 31 is always misaligned with each of the second spiral guide grooves 8211 on the second connecting part 81.

[0082] Please refer to the following: Figure 7-12 In a preferred embodiment of the second embodiment, the handle portion 45 is U-shaped, and the two ends of the handle portion 45 are respectively connected to the first rotating portion 41 and the second rotating portion 43.

[0083] Please refer to the following: Figure 7-12 In a preferred embodiment of Example 2, the connector 5 is a connecting screw, and the first adjusting hole 21, the second adjusting hole 71 and the first connecting hole 33 are all through holes or open holes. The first connecting hole 33 passes through the first guide part 32, the first connecting part 31 and the first plug-in end 311. The second connecting hole 83 is a screw hole that matches the connecting screw (connector 5), and the second connecting hole 83 can be a through hole or a blind hole. The second connecting hole 83 passes through the second guide part 82, the second connecting part 81 and the second plug-in end 811.

[0084] In other embodiments of Embodiment 2 (not shown in the figure), the connector 5 is a connecting shaft. The first adjusting protrusion 2, the first limiting member 3, the second adjusting protrusion 7, and the second limiting member 8 are respectively provided with a plurality of pin holes that connect the first adjusting hole 21 and the second adjusting hole 71. By passing through the corresponding pin holes and abutting against the connecting shaft (connector 5), the connecting shaft (connector 5) locks the first limiting member 3 and the second limiting member 8.

[0085] Please refer to the following: Figure 7-12 In the preferred embodiment of Example 2, the number of the first spiral guide groove 3211, the first ball groove 4111, the first adjusting ball 42, the second spiral guide groove 8211, the second ball groove, and the second adjusting ball 44 are all 2 or 3, and the values ​​of the first central angle and the second central angle are both in the range of 30-120 degrees.

[0086] Please refer to the following: Figure 7-12In a more preferred embodiment of the second embodiment, both the first central angle and the second central angle are 90 degrees, and the handle part 45 can be flipped back and forth at a 90-degree flip angle between the horizontally extended unfolded state and the vertically downward retracted state.

[0087] Please refer to the following: Figure 7-12 In a preferred embodiment of the second embodiment, a first positioning groove 3212 is provided at the junction of the surface of the first guide surface 321 and the highest point of the corresponding first spiral guide groove 3211, and a second positioning groove 8212 is provided at the junction of the surface of the second guide surface 821 and the highest point of the corresponding second spiral guide groove 8211.

[0088] When the user flips the handle 45 to repeatedly rotate it to match the rotation angles of the first and second central angles, it drives each of the first ball bearing slots 4111 to rotate back and forth between the lowest point of the corresponding first positioning groove 3212 and the lowest point of the corresponding first spiral guide groove 3211. Simultaneously, it drives each of the second ball bearing slots to rotate back and forth between the lowest point of the corresponding second positioning groove 8212 and the lowest point of the corresponding second spiral guide groove 8211. This allows the first ball bearing slot 4111 to rotate to the position corresponding to the lowest point of the first spiral guide groove 3211. When the first adjusting ball 42 is positioned at the highest point, it is engaged with the corresponding first positioning groove 3212. When the second ball groove rotates to the position directly opposite the highest point of the corresponding second spiral guide groove 8211, the second adjusting ball 44 is engaged with the corresponding second positioning groove 8212. This avoids the handle part 45 from flipping beyond the first and second central angles when the first adjusting ball 42 and the second adjusting ball 44 are respectively disengaged from the first and second spiral guide grooves 3211 and 8211, resulting in invalid flipping and difficult recovery.

[0089] Please refer to the following: Figure 7-12 In a preferred embodiment of Embodiment 2, both the first connecting portion 31 and the second connecting portion 81 are cylindrical, and the first guiding portion 32 and the second guiding portion 82 are respectively cylindrical with an outer diameter larger than that of the first connecting portion 31 and the second connecting portion 81. The first guiding portion 32 and the second guiding portion 82 are coaxially disposed at the other end of the first connecting portion 31 and the second connecting portion 81 facing away from the first insertion end 311 and the second insertion end 811. The first guiding surface 321 and the second guiding surface 821 are both annular.

[0090] Both the first rotating part 41 and the second rotating part 43 are cylindrical. The first rotating part 41 and the second rotating part 43 are respectively provided with a first hinge hole 412 and a second hinge hole 432 that match the shape of the first connecting part 31 and the second connecting part 81. Both the first rotating surface 411 and the second rotating surface 431 are annular.

[0091] Please refer to the following: Figure 7-12 In a more preferred embodiment of the second embodiment, the first rotating part 41 and the second rotating part 43 are respectively provided with a first clearance platform 413 and a second clearance platform 433 on the side opposite to the first adjusting protrusion 2 and the second adjusting protrusion 7, which match the shape of the first guide part 32 and the second guide part 82. The bottom surfaces of the first clearance platform 413 and the second clearance platform 433 are respectively provided with a first hinge hole 412 and a second hinge hole 432 penetrating the first rotating part 41 and the second rotating part 43. The bottom surfaces of the first clearance platform 413 and the second clearance platform 433 respectively form a first rotating surface 411 and a second rotating surface 431 surrounding the first hinge hole 412 and the second hinge hole 432.

[0092] During assembly, the outer surfaces of the first guide portion 32 and the second guide portion 82 abut against the inner surfaces of the first relief platform 413 and the second relief platform 433, respectively. The end faces of the first guide portion 32 and the second guide portion 82 are flush with the side end faces of the first rotating portion 41 and the second rotating portion 43 facing away from the first adjusting protrusion 2 and the second adjusting protrusion 7, respectively. This allows the first guide portion 32 and the second guide portion 82 to slide along the inner surfaces of the first relief platform 413 and the second relief platform 433 when the locking handle 4 is turned back and forth, thereby improving the stability of the locking handle 4 driving the first rotating portion and the second rotating portion 43 to rotate back and forth.

[0093] Please refer to the following: Figure 7-12 In a preferred embodiment of Example 2, the clamp 1 is C-shaped, and the cross-sections of the first adjustment hole 21 and the second adjustment hole 71 are both regular hexagonal. The first insertion end 311 and the second insertion end 811 are respectively regular hexagonal prisms that match the shapes of the first adjustment hole 21 and the second adjustment hole 71, so as to improve the clamping performance, stability and the insertion firmness of the first insertion end 311, the second insertion end 811 and the first adjustment hole 21, the second adjustment hole 71.

[0094] Please refer to the following: Figure 13-15 The present invention also provides a height adjustment structure for the seat post of the frame center tube 6, including the frame center tube 6 and the seat post passing through the frame center tube 6, and also includes the above-mentioned clamping device. The clamp 1 is located at the top of the frame center tube 6, and the clamp 1 clamps and loosens the seat post in the pressed state and the relaxed state, respectively.

[0095] Please refer to the following: Figure 13-14 In a preferred embodiment of Example 2, the locking handle 4 is flipped up and down from the front of the frame, that is, the handle part 45 flips back and forth at a 90-degree angle between the extended state where it extends horizontally forward along the frame center tube 6 and the folded state where it is vertically downward and attached to the front side of the frame center tube 6.

[0096] Please see Figure 15In other embodiments of Embodiment 2, the locking handle 4 is flipped up and down from the rear of the frame center tube 6. That is, the handle part 45 is flipped back and forth at a 90-degree angle between the extended state extending horizontally to the rear of the frame center tube 6 and the folded state that is vertically downward and attached to the rear side of the frame center tube 6. At this time, it is only necessary to swap the left and right positions of the first limiting member 3, the second limiting member 8, the first rotating part 41, and the second rotating part 43 when the locking handle 4 is flipped up and down from the front of the frame.

[0097] In one embodiment of Example 2 (not shown in the figure), the top end of the frame tube 6 is provided with a top notch (not shown in the figure) that matches the deformation notch 11. The clamp 1 is fitted onto the top end of the frame tube 6, and the deformation notch 11 is aligned with the top notch. Thus, when the user moves the handle part 45 to drive the first adjusting protrusion 2 to move closer to or away from the second adjusting protrusion 7, and the second adjusting protrusion 7 to move closer to or away from the first adjusting protrusion 2, the size of the deformation notch 11 of the clamp 1 and the top notch of the frame tube 6 are simultaneously reduced or enlarged, so as to improve the adjustment effect of the notch size.

[0098] Please refer to the following: Figure 13-14 In one embodiment of the second example, the clamp 1 is integrally set at the top of the frame center tube 6. The frame center tube 6 is provided with an extension notch 61 that connects to the deformation notch 11. Thus, when the user moves the handle part 45 to drive the first adjusting protrusion 2 to move closer to or away from the second adjusting protrusion 7 and the second adjusting protrusion 7 to move closer to or away from the first adjusting protrusion 2, the size of the deformation notch 11 of the clamp 1 and the extension notch 61 of the frame center tube 6 are simultaneously reduced or enlarged to improve the notch adjustment effect.

[0099] In another embodiment of the second embodiment, the first adjusting protrusion 2 and the second adjusting protrusion 7 are respectively welded or detachably connected to the clamp 1 at the top of the frame center tube 6 by means of screws, bolts or other connecting structures, or are integrally set on it. This allows the clamp holding device provided by the present invention to be quickly and cost-effectively modified from the existing frame center tube 6, thereby improving the production efficiency of the clamp holding device and reducing the production cost of the clamp holding device.

[0100] The preferred implementation of Embodiment 1 can be referred to Embodiment 2, which is an improvement thereon, and will not be repeated here.

[0101] This utility model also provides a portable vehicle (not shown in the figure), including a base and a frame tube 6 disposed on the base, and also includes a height adjustment structure for the seat rod of the frame tube 6.

[0102] In this embodiment, the portable vehicle can be a bicycle, electric vehicle, scooter, or wheelchair.

[0103] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Those skilled in the art should understand that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clamping device, characterized in that, include: Hoop (1); The first adjusting protrusion (2) and the second adjusting protrusion (7) are respectively provided on both sides of the deformation notch (11) of the clamp (1). The first adjusting protrusion (2) and the second adjusting protrusion (7) are respectively provided with a first adjusting hole (21) and a second adjusting hole (71). The first limiting member (3) includes: The first connecting part (31) has one end as a first plug-in end (311) that matches the first adjusting hole (21). The first connecting part (31) is plugged into the first adjusting hole (21) on the side of the first adjusting protrusion (2) facing away from the second adjusting protrusion (7) through the first plug-in end (311). A first guide portion (32) is provided at the other end of the first connecting portion (31) facing away from the first plug-in end (311). The first guide portion (32) has a first guide surface (321) surrounding the first connecting portion (31) on the side facing the first connecting portion (31). The first guide surface (321) is provided with at least two first spiral guide grooves (3211) evenly spaced along the circumference of the first connecting portion (31). The first connecting hole (33) is provided on the first limiting member (3) and matches the first adjusting hole (21); Locking handle (4), including: The first rotating part (41) and the handle part (45) provided on the first rotating part (41) are rotatably sleeved on the first connecting part (31) and abut against the side of the first adjusting protrusion (2) facing away from the second adjusting protrusion (7). The end of the first rotating part (41) facing away from the first adjusting protrusion (2) is provided with a first rotating surface (411) that surrounds the first connecting part (31) and is spaced apart from the first guide surface (321). The first rotating surface (411) is provided with at least two first ball grooves (4111) that match the first spiral guide groove (3211) evenly spaced along the circumference of the first connecting part (31). At least two first adjusting balls (42) abut against the corresponding first ball grooves (4111) and the first guide part (32) respectively. A connector (5) is inserted into the first connecting hole (33) and the second adjusting hole (71) to limit the distance between the first limiting member (3) and the second limiting member (8); When the handle (45) flips back and forth at a certain flip angle, it drives each first ball groove (4111) to rotate and switch between the position opposite the first guide surface (321) and the position corresponding to the first spiral guide groove (3211), so that each first adjusting ball (42) presses against the first rotating part (41) and relaxes the first adjusting protrusion (2) respectively, so as to switch the clamp (1) between the pressed state and the relaxed state.

2. The clamping device as described in claim 1, characterized in that, Also includes: The second limiting member (8) includes: The second connecting part (81) has one end as a second plug-in end (811) that matches the second adjusting hole (71). The second connecting part (81) is connected to the second adjusting hole (71) through the second plug-in end (811) on the side of the second adjusting protrusion (7) facing away from the first adjusting protrusion (2). The second guide portion (82) is located at the other end of the second connecting portion (81) opposite to the second plug-in end (811). The second guide portion (82) has a second guide surface (821) surrounding the second connecting portion (81) on the side facing the second connecting portion (81). The second guide surface (821) has at least two second spiral guide grooves (8211) evenly spaced along the circumference of the second connecting portion (81), and the first spiral guide groove (3211) and the second spiral guide groove (8211) have opposite directions of rotation. The second connecting hole (83) is provided on the second limiting member (8) and matches the second adjusting hole (71); The locking handle (4) also includes: The second rotating part (43) is connected to the first rotating part (41) through the handle part (45). The second rotating part (43) is rotatably sleeved on the second connecting part (81) and abuts against the side of the second adjusting protrusion (7) facing away from the first adjusting protrusion (2). The end of the second rotating part (43) facing away from the second adjusting protrusion (7) is provided with a second rotating surface (431) that surrounds the second connecting part (81) and is spaced apart from the second guide surface (821). The second rotating surface (431) is provided with at least two second ball grooves that match the second spiral guide groove (8211) evenly spaced along the circumference of the second connecting part (81). At least two second adjusting balls (44) abut against the corresponding second ball grooves and the second guide part (82) respectively. The connector (5) passes through the first connecting hole (33), the second connecting hole (83), and the second adjusting hole (71); When the handle (45) flips back and forth at a certain flip angle, it also drives each second ball groove to rotate and switch between the position opposite the second guide surface (821) and the position corresponding to the second spiral guide groove (8211), so that each second adjusting ball (44) presses against and relaxes the second adjusting protrusion (7) of the second rotating part (43).

3. The clamping device as described in claim 2, characterized in that, The lowest point at one end of the first spiral guide groove (3211) and the highest point at the other end of the first spiral guide groove (3211) form a first central angle with the axis of the first connecting part (31), and the lowest point at one end of the second spiral guide groove (8211) and the highest point at the other end of the second spiral guide groove (8211) form a second central angle with the axis of the second connecting part (81). When the handle (45) reciprocates at a rotation angle matching the first central angle and the second central angle, it drives each first ball bearing groove (4111) to rotate and switch between the highest point and the lowest point of the corresponding first spiral guide groove (3211), and drives each second ball bearing groove to rotate and switch between the highest point connection point and the lowest point of the corresponding second spiral guide groove (8211).

4. The clamping device as described in claim 3, characterized in that, The number of the first spiral guide groove (3211), the first ball groove (4111), the first adjusting ball (42), the second spiral guide groove (8211), the second ball groove, and the second adjusting ball (44) are all 2 or 3, and the value range of the first central angle and the second central angle are both 30-120 degrees.

5. The clamping device as described in claim 4, characterized in that, Both the first central angle and the second central angle are 90 degrees, and the handle part (45) can be flipped back and forth at a 90-degree angle between the horizontally extended extended state and the vertically downward retracted state.

6. The clamping device as described in claim 3, characterized in that, A first positioning groove (3212) is provided at the junction of the surface of the first guide surface (321) and the highest point of the corresponding first spiral guide groove (3211), and a second positioning groove (8212) is provided at the junction of the surface of the second guide surface (821) and the highest point of the corresponding second spiral guide groove (8211). When the handle (45) reciprocates at a rotation angle matching the first central angle and the second central angle, it drives each first ball bearing slot (4111) to rotate and switch between the lowest point corresponding to the first positioning groove (3212) and the lowest point corresponding to the first spiral guide groove (3211), and drives each second ball bearing slot to rotate and switch between the lowest point corresponding to the second positioning groove (8212) and the lowest point corresponding to the second spiral guide groove (8211), so that when the first ball bearing slot (4111) rotates to the highest point corresponding to the first spiral guide groove (3211), the first adjusting ball (42) is positioned and engaged with the corresponding first positioning groove (3212), and when the second ball bearing slot rotates to the highest point corresponding to the second spiral guide groove (8211), the second adjusting ball (44) is positioned and engaged with the corresponding second positioning groove (8212).

7. The clamping device as described in claim 2, characterized in that, Both the first connecting portion (31) and the second connecting portion (81) are cylindrical. The first guiding portion (32) and the second guiding portion (82) are cylindrical with an outer diameter larger than that of the first connecting portion (31) and the second connecting portion (81). The first guiding portion (32) and the second guiding portion (82) are coaxially disposed at the other end of the first connecting portion (31) and the second connecting portion (81) facing away from the first plug-in end (311) and the second plug-in end (811). Both the first guiding surface (321) and the second guiding surface (821) are annular. Both the first rotating part (41) and the second rotating part (43) are cylindrical. The first rotating part (41) and the second rotating part (43) are respectively provided with a first hinge hole (412) and a second hinge hole (432) that match the shape of the first connecting part (31) and the second connecting part (81). Both the first rotating surface (411) and the second rotating surface (431) are annular.

8. The clamping device as described in claim 7, characterized in that, The first rotating part (41) and the second rotating part (43) are respectively provided with a first clearance platform (413) and a second clearance platform (433) on the side opposite to the first adjusting protrusion (2) and the second adjusting protrusion (7), which are matched with the shape of the first guide part (32) and the second guide part (82). The bottom surface of the first clearance platform (413) and the second clearance platform (433) are respectively provided with the first hinge hole (412) and the second hinge hole (432) penetrating the first rotating part (41) and the second rotating part (43). The bottom surface of the first clearance platform (413) and the second clearance platform (433) respectively forms the first rotating surface (411) and the second rotating surface (431) surrounding the first hinge hole (412) and the second hinge hole (432).

9. The clamping device as described in any one of claims 2-8, characterized in that, The clamp (1) is C-shaped, and the cross-sections of the first adjustment hole (21) and the second adjustment hole (71) are both regular hexagonal. The first insertion end (311) and the second insertion end (811) are regular hexagonal prisms that match the shapes of the first adjustment hole (21) and the second adjustment hole (71), respectively.

10. A frame center tube seat post height adjustment structure, comprising a frame center tube (6) and a seat post passing through the frame center tube (6), characterized in that, It also includes a clamping device as described in any one of claims 1-9, wherein the clamp (1) is located at the top of the frame tube (6), and the clamp (1) clamps and loosens the seat post in the compressed state and the relaxed state, respectively.

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