Locking apparatus for preventing loosening of ring clamp
By using the design of trapezoidal bosses and positioning grooves, combined with the eccentric wheel locking mechanism, the problem of loosening of the clamp ring is solved, and a firm connection between the insert tube and the stem tube is achieved, improving the safety and stability of the bicycle.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CAO HUI
- Filing Date
- 2024-12-26
- Publication Date
- 2026-05-21
AI Technical Summary
The existing clamps in bicycles are prone to causing relative movement between the insert tube and the seat tube due to vibration, posing a safety hazard.
The design employs a trapezoidal boss and positioning groove, combined with an eccentric wheel locking mechanism. The relative movement of the insertion tube and the riser is restricted by the guide block engagement and limit screws, ensuring a secure connection.
It effectively prevents the insertion tube and riser from moving relative to each other axially in harsh environments, improving safety and connection stability.
Smart Images
Figure CN2024142571_21052026_PF_FP_ABST
Abstract
Description
Locking device for preventing loosening of the anti-locking ring clamp Technical Field
[0001] This invention relates to the field of pipe fitting connection and fixing technology, and more specifically, to a locking device for preventing loosening of the clamping ring. Background Technology
[0002] In the cycling world, a seat clamp typically refers to a bicycle accessory. Specifically, it works on an adjustable insert tube, extending and retracting into the seat tube. Once the insert tube and seat tube are properly positioned, the seat clamp is tightened to fix them in place, preventing either axial sliding or circumferential rotation. This design allows riders to adjust the length and angle of the seat tube according to their individual body conditions and riding habits, achieving a more comfortable and personalized riding posture.
[0003] For example, Chinese Patent 202222364945.4 discloses a self-locking device for fixing telescopic tubes. This device is made integrally with a limiting V-shaped boss and a clamping ring, and the V-shaped boss and the V-shaped groove on the insertion tube form a limiting fit. The two sides of the V-shaped boss and the V-shaped groove are beveled to ensure a closer fit and prevent the insertion tube from rotating relative to the upright tube. However, this device only limits the circumferential rotation direction by using the V-shaped boss to fit into the V-shaped groove. When a bicycle travels on a steep slope for a long time, the frequent vibrations will cause the insertion tube to move relative to the vertical direction, giving a loose feeling and posing a safety hazard to the rider in the long run. Summary of the Invention
[0004] The purpose of this invention is to provide a locking device for preventing the clamp from loosening, which makes the connection between the insertion tube and the riser more secure and less likely to cause relative movement between the insertion tube and the riser during long-term use, thereby improving safety.
[0005] The technical solution adopted by the locking device for preventing loosening of the anti-coil clamp disclosed in this invention is as follows:
[0006] A locking device for preventing the loosening of a retaining ring clamp includes an insertion tube with a groove along the outer circular wall surface, a riser tube with a notch along the wall surface, a retaining ring clamp fitted around the outer circle of the riser tube, and an eccentric wheel locking mechanism connected to the open end of the retaining ring clamp. The inner circular wall surface of the retaining ring clamp is provided with a boss that matches the groove. The boss is connected to the inner circular wall surface of the retaining ring clamp by a guide block. The guide block is engaged in the notch of the riser tube. The surface of the riser tube is provided with a positioning groove. The positioning groove is connected to one side of the notch. When the retaining ring clamp is twisted, the guide block can be engaged into the positioning groove.
[0007] As a preferred embodiment, the cross-section of the groove is trapezoidal, with the short side of the trapezoid located at the bottom of the groove and being a plane. The long side of the trapezoid is located at the opening of the groove and is an arc surface, which is consistent with the curvature of the inner circular wall of the clamping ring.
[0008] As a preferred embodiment, the boss is a trapezoidal boss, the short side of which is a plane and coincides with the bottom of the groove, and the long side of which is an arc surface and fits against the inner circular wall surface of the clamping ring.
[0009] As a preferred embodiment, the bottom of the groove is an arc surface, and the short side of the boss is also an arc surface.
[0010] As a preferred embodiment, the positioning groove is rectangular in shape, and the shape of the guide block is consistent with the shape of the positioning groove.
[0011] As a preferred embodiment, the eccentric wheel locking mechanism further includes a nut, an adjusting screw, a handle, and a pin. The adjusting screw is inserted into the open end of the clamping ring, one end of the adjusting screw is screwed to the nut, and the other end of the adjusting screw is engaged with the handle. A washer is provided between the handle and the clamping ring, and the pin is located inside the annular end of the handle and forms a bolt connection with the adjusting screw.
[0012] As a preferred embodiment, the outer wall of the clamping ring is provided with a positioning hole, which penetrates one side of the opening end of the clamping ring. A limiting screw is provided in the positioning hole, and the limiting screw is installed in the positioning hole. One end of the limiting screw is located between the opening ends of the clamping ring. When the guide block is placed in the positioning groove, the limiting screw is limited by the opening end of the clamping ring, which can restrict the rotation of the guide block.
[0013] As a preferred embodiment, the limiting screw is a grommet screw.
[0014] As a preferred embodiment, the riser is further provided with a circular hole, which is connected to one end of the notch.
[0015] As a preferred embodiment, the clamping ring, insertion tube, and riser are made of extruded profiles.
[0016] The beneficial effects of the locking device for preventing loosening of the clamping ring disclosed in this invention are as follows: a positioning groove is provided next to the notch of the riser. After the clamping ring slides into the notch of the riser and rotates, the guide block on the clamping ring can be engaged in the positioning groove. The guide block in the positioning groove prevents the insertion tube and the riser from moving axially relative to each other in a harsh and bumpy environment, thereby improving the safety of use.
[0017] When the guide block is placed in the positioning groove and the limiting screw is locked in the positioning hole, the side wall of the riser notch can limit the limiting screw, restrict the rotation angle of the clamping ring, and prevent the guide block from detaching from the positioning groove. The insertion tube and the riser cannot move axially, ensuring good safety. When the insertion tube and the riser are loose, the nut and adjusting screw of the eccentric wheel locking mechanism are adjusted to lock the clamping ring, making the riser firmly clamp the insertion tube. Attached Figure Description
[0018] Figure 1 is a schematic diagram of the locking device for preventing loosening of the anti-locking ring clamp of the present invention.
[0019] Figure 2 is an exploded schematic diagram of the locking device for preventing loosening of the anti-locking ring clamp of the present invention.
[0020] Figure 3 is a top view of the locking device for preventing loosening of the clamping ring in this invention, showing the clamping ring installed into the insertion tube.
[0021] Figure 4 is a cross-sectional view of the locking device for preventing loosening of the anti-locking ring clamp of the present invention after assembly. Detailed Implementation
[0022] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:
[0023] Referring to Figures 1 to 4, a locking device for preventing the loosening of a retaining ring clamp includes an insertion tube 10 with a groove 11 axially provided along the outer circular wall surface, a riser tube 20 with a notch 21 axially provided along the wall surface, a retaining ring clamp 30 fitted around the outer circle of the riser tube 20, and an eccentric wheel locking mechanism 40 connected to the open end of the retaining ring clamp 30. The inner circular wall surface of the retaining ring clamp 30 is provided with a boss 31 that matches the groove 11. The boss 31 is connected to the inner circular wall surface of the retaining ring clamp 30 by a guide block 32. The guide block 32 is engaged in the notch 21 of the riser tube 20. The surface of the riser tube 20 is provided with a positioning groove 22. The positioning groove 22 is connected to one side of the notch 21. When the retaining ring clamp 30 is twisted, the guide block 32 can be engaged into the positioning groove 22.
[0024] The groove 11 has a trapezoidal cross-section, with the bottom of the groove 11 being the upper base of the trapezoid, i.e., the short base. The bottom of the groove 11 is a plane, and the side of the groove 11 is the waist of the trapezoid. The long side of the trapezoid is located at the opening of the groove 11, and the long side of the trapezoid is an arc surface that matches the curvature of the inner circular wall of the clamping ring 30.
[0025] The boss 31 is a trapezoidal boss 31. The short side of the trapezoidal boss 31 is a plane, which is consistent with the bottom of the groove 11. The long side of the trapezoidal boss 31 is an arc surface, which fits against the inner circular wall surface of the clamping ring 30.
[0026] The trapezoidal boss 31 and the clamping ring 30 are integrally manufactured. The cross-section of the groove 11 of the insertion tube 10 is trapezoidal. The trapezoidal boss 31 and the trapezoidal groove 11 on the insertion tube 10 form a limiting fit. The design of the trapezoidal boss enables it to withstand greater tension and torque, providing a reliable connection and ensuring that the insertion tube 10 cannot rotate relative to the upright tube 20. In addition, the long side of the trapezoidal boss 31 is also an arc surface, which can better fit tightly with the inner circular wall of the clamping ring 30, making it less prone to loosening or falling off, and thus more reliable.
[0027] In another embodiment, the bottom of the groove 11 can be an arc surface, and the corresponding boss 31 is also an arc surface. When the boss 31 is installed into the groove 11, the contact area is larger due to the arc surface, and the friction force generated is greater, so that the insertion tube 10 and the riser tube 20 are locked more firmly by the clamping ring 30.
[0028] The positioning groove 22 is rectangular in shape, and the guide block 32 has the same shape as the positioning groove 22. The fact that the positioning groove 22 and the guide block 32 have the same shape helps to limit the guide block 32, ensuring that there is no relative movement between the insertion tube 10 and the riser tube 20 in the axial direction.
[0029] The eccentric wheel locking mechanism 40 further includes a nut 41, an adjusting screw 42, a handle 43, and a pin 44. The adjusting screw 42 is inserted into the open end of the clamping ring 30. One end of the adjusting screw 42 is screwed onto the nut 41, and the other end of the adjusting screw 42 engages with the handle 43. A washer 45 is provided between the handle 43 and the clamping ring 30. The pin 44 is located inside the annular end of the handle 43 and is bolted to the adjusting screw 42. The tightness of the eccentric wheel locking mechanism 40 can be adjusted by adjusting the nut 41 and the adjusting screw 42.
[0030] The position of the eccentric wheel can be easily adjusted by the cooperation of the handle 43 and the adjusting screw 42, so as to achieve quick locking and releasing. The operation is simple and quick, allowing the riser 20 to effectively deform elastically and tightly clamp the insertion tube 10, thereby reliably fixing the riser 20 and the insertion tube 10 together and achieving the purpose of safe locking. The insertion of the insertion tube 10 can also be adjusted by adjusting the eccentric wheel locking mechanism 40. The operation is simple and highly flexible.
[0031] The outer wall of the clamp 30 is provided with a positioning hole 23, which penetrates one side of the opening end of the clamp 30. A limiting screw 50 is provided in the positioning hole 23. The limiting screw 50 is installed in the positioning hole 23, and one end of the limiting screw 50 is located between the opening ends of the clamp 30. When the guide block 32 is located in the positioning groove 22, the limiting screw 50 is limited by the opening end of the clamp 30, which can restrict the rotation of the guide block 32. The limiting screw 50 is a caliper screw.
[0032] Due to machining errors in the notch 21, the horizontal tube 60 may not be perpendicular to the center plane of the frame during assembly. By adjusting the limiting screw 50, the angle of the insertion tube 10 is adjusted to make the horizontal tube 60 perpendicular to the center plane of the frame, and the guide block 32 not completely disengaged from the positioning groove 22, meaning that the insertion tube 10 and the riser tube 20 cannot move axially relative to each other. One end of the limiting screw 50 can maintain a certain distance from the inner wall of the riser tube notch 21, ensuring that the riser tube 20 will not rotate significantly relative to each other when under force, thereby further limiting the relative rotation of the clamp 30 and the insertion tube 10 and the riser tube 20, preventing the guide block 32 from falling out of the positioning groove 22, thus allowing the insertion tube 10 and the riser tube 20 to move relative to each other, resulting in greater reliability; and maintaining a certain distance allows the clamp 30 and the riser tube 20 to have sufficient circumferential adjustability, making it easy to adjust the horizontal tube 60 to be perpendicular to the center plane of the bicycle frame when installing the insertion tube 10 onto the riser tube 20. When the horizontal tube 60 is perpendicular to the bicycle frame, the limiting screw 50 can abut against the inner wall of the notch 21 of the vertical tube, preventing the vertical tube 20 and the insertion tube 10 from rotating relative to each other, so that the guide block 32 is engaged in the positioning groove 22, making the vertical tube 20, the insertion tube 10 and the clamp 30 more stable and safer.
[0033] The riser 20 is also provided with a round hole 24, which is connected to one end of the notch 21. Under normal circumstances, the round hole 24 can relatively protect the strength of the notch of the riser 20.
[0034] The clamp 30, insertion tube 10, and riser 20 are made of extruded profiles. Due to their unique manufacturing process, extruded profiles offer a high-strength and lightweight structure, helping to reduce overall structural weight without sacrificing strength, and are cost-effective, allowing for the rapid production of large quantities of consistent components. With technological advancements, the insertion tube 10 and riser 20 can also be forged.
[0035] This invention discloses a locking device for preventing the loosening of a clamping ring. A notch 21 is provided on the surface of a riser 20, and a positioning groove 22 is provided on one side of the notch 21. The clamping ring 30 slides into the notch 21 of the riser 20 and rotates, engaging the guide block 32 on the clamping ring 30 into the positioning groove 22. When the insertion tube 10 is installed into the riser 20, the trapezoidal protrusion 31 on the clamping ring 30 and the trapezoidal groove 11 of the insertion tube 10 are fitted together, ensuring that the insertion tube 10 cannot rotate relative to the riser 20. Rotating the eccentric locking handle 43 locks the insertion tube 10 to the riser 20, forming a sufficient circumferential closed-loop locking force to prevent the insertion tube 10 from loosening. The 0-circumferential rotation is controlled by the guide block 32, which is positioned in the positioning groove 22. The positioning groove 22 limits and abuts the upper and lower surfaces of the guide block 32, preventing the insertion tube 10 from axially displacing vertically. It also allows for adjustment of the locating screw 50, ensuring that one end of the locating screw 50 maintains a certain distance from the inner surface of the notch 21. This ensures that the riser tube 20 does not rotate too much relative to the locating screw when under force, further limiting the relative left and right rotation of the clamping ring 30 and the riser tube 20. This prevents the guide block 32 from sliding out of the positioning groove 22 axially, making the connection between the insertion tube 10 and the riser tube 20 more secure. It also prevents positional deviation after long-term use, resulting in stronger safety performance.
[0036] The riser 20 of the locking device for preventing loosening of the clamping ring of the present invention has only one notch 21, which improves the rigidity of the riser 20. A positioning groove 22 is provided on one side of the notch 21. When the clamping ring 30 squeezes the riser 20, it does not affect the shrinkage of the notch 21 of the riser 20, thus locking it with the insertion tube 10, which provides better safety performance.
[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.
Claims
1. A locking device for preventing loosening of a clamping ring, comprising an insertion tube with an axial groove along its outer wall surface, a riser tube with an axial notch along its wall surface, a clamping ring fitted onto the outer circumference of the riser tube, and an eccentric wheel locking mechanism connected to the open end of the clamping ring. The inner wall surface of the clamping ring is provided with a boss that matches the groove, the boss being connected to the inner wall surface of the clamping ring by a guide block, the guide block being engaged in the notch of the riser tube. The surface of the riser is provided with a positioning groove, which is located on one side of the notch and is connected to the notch. The positioning groove is used to accommodate the guide block.
2. The locking device of claim 1, wherein the locking device is configured to prevent the release of the band clamp by preventing the rotation of the band clamp. The groove has a trapezoidal cross-section, with the bottom of the groove being the upper base of the trapezoid and the two sides of the groove being the waist sides of the trapezoid. The boss mates with the groove.
3. The locking device of claim 2, wherein the locking device is configured to prevent the release of the band clamp by preventing the rotation of the locking member relative to the band clamp. The bottom of the groove is flat.
4. The locking device of claim 2, wherein the locking device is configured to prevent the release of the band clamp by preventing the rotation of the locking member relative to the band clamp. The bottom of the groove is an arc surface.
5. The locking device of claim 1, wherein the locking device is configured to prevent the release of the band clamp by preventing the rotation of the locking member relative to the band clamp. 5 The positioning groove is rectangular in shape, and the guide block has the same shape as the positioning groove.
6. The locking device of claim 1, wherein the locking device is configured to prevent the release of the band clamp by preventing the rotation of the band clamp. The eccentric wheel locking mechanism also includes a nut, an adjusting screw, a handle, and a pin. The adjusting screw is inserted into the open end of the clamping ring. One end of the adjusting screw is screwed to the nut, and the other end of the adjusting screw is engaged with the handle. A washer is provided between the handle and the clamping ring. The pin is located inside the annular end of the handle and is bolted to the adjusting screw.
7. The locking device of claim 1, wherein the locking device is a locking device for a harness loop, and wherein the locking device comprises a locking device for a harness loop that is configured to prevent the harness loop from being loosened. The outer wall of the clamping ring is provided with a positioning hole, which penetrates one side of the opening end of the clamping ring. A limiting screw is provided in the positioning hole, with one end of the limiting screw extending out of the opening end of the clamping ring and facing the side wall of the riser notch. When the guide block is placed in the positioning groove and the limiting screw is locked in the positioning hole, the side wall of the riser notch limits the limiting screw, which can prevent the guide block from detaching from the positioning groove.
8. The locking device of claim 7, wherein the locking device further comprises a locking member disposed on the first end of the locking device and configured to engage the first end of the locking device to prevent the locking device from being removed from the first end of the locking device. The limiting screw is a grommet screw.
9. The locking device of claim 1, wherein the locking device is configured to prevent the release of the band clamp by preventing the rotation of the locking device. The riser is also provided with a round hole, which is connected to one end of the notch.
10. The locking device of claim 1, wherein the locking device is configured to prevent the release of the band clamp by preventing the rotation of the band clamp. The aforementioned clamp, insertion tube, and riser are made of extruded profiles.