Locking device for preventing clamp clip from loosening

Abstract

A locking device for preventing a clamp from loosening comprises an insertion pipe (10) provided with a groove (11) in the axial direction of the outer circle wall face, a vertical pipe (20) provided with a notch (21) in the axial direction of the wall body, the clamp (30) arranged on the outer circle of the vertical pipe (20) in a sleeving mode and an eccentric wheel locking mechanism (40) connected to the opening end of the clamp (30), and a boss (31) matched with the groove (11) is arranged on the inner circle wall face of the clamp (30). A boss (31) is arranged on the vertical pipe (20), the boss (31) is connected with the inner circle wall face of the clamp (30) through a guide block (32), the guide block (32) is clamped in a notch (21) of the vertical pipe (20), a positioning groove (22) is formed in the surface of the vertical pipe (20), the positioning groove (22) is formed in one side of the notch (21), the positioning groove (22) is communicated with the notch (21), and the positioning groove (22) is used for containing the guide block (32). According to the locking device capable of preventing the clamp from loosening, the guide block rotated into the positioning groove prevents the insertion pipe and the vertical pipe from moving relatively in the axial direction in the severe bumpy environment, and the safety performance is higher.

Description

Technical Field

[0001] The invention relates to the technical field of pipe connection and fixing, in particular to a locking device for preventing a clamp ring from loosening. Background Art

[0002] In the field of bicycles, a clamp usually refers to a bicycle accessory. Specifically, it acts on an adjustable insert tube, which is telescopically connected to the inside of the seat tube. When the relative position of the insert tube and the seat tube is adjusted, the clamp is locked to fix the insert tube and the seat tube relative to each other, so that the two cannot slide relative to each other axially or rotate relative to each other circumferentially. This design allows riders to adjust the length and angle of the seat tube according to their personal physical conditions and riding habits to achieve a more comfortable and personalized riding posture.

[0003] For example, a self-locking device for fixed connection of telescopic pipe fittings disclosed in Chinese Patent 202222364945.4 is made of a V-shaped boss with a limiting position and a clamp, and the V-shaped boss and the V-shaped groove on the insertion tube form a limiting fit. The two side edges corresponding to the V-shaped boss and the V-shaped groove are beveled, so that they fit better, which can ensure that the insertion tube cannot rotate relative to the vertical tube. However, the device only forms a limiting fit by the V-shaped boss fitting into the V-shaped groove, and can only limit the circumferential rotation direction firmly. When a bicycle travels on a steep slope for a long time, frequent vibrations will cause the axial up and down directions of the insertion tube to move relative to each other, giving a loose feeling, and in the long run, it will also bring safety hazards to the rider. Summary of the invention

[0004] The purpose of the present invention is to provide a locking device for preventing the clamp from loosening, so that the connection between the insertion tube and the vertical tube is more secure, and the insertion tube and the vertical tube are not easily moved relative to each other during long-term use, thereby improving safety.

[0005] The technical solution adopted by the locking device for preventing the clamp from loosening disclosed in the present invention is:

[0006] A locking device for preventing a clamp from loosening comprises an insertion tube with a groove axially provided along an outer circumferential wall surface, a vertical tube with a notch axially provided along a wall body, a clamp sleeved on the outer circumference of the vertical tube, and an eccentric wheel locking mechanism connected to the open end of the clamp, wherein the inner circumferential wall surface of the clamp is provided with a boss matching the groove, the boss is connected to the inner circumferential wall surface of the clamp by a guide block, the guide block is clamped in the notch of the vertical tube, a positioning groove is provided on the surface of the vertical tube, the positioning groove is communicated with one side of the notch, and when the clamp is twisted, the guide block can be clamped into the positioning groove.

[0007] As a preferred embodiment, the cross-section of the groove is a trapezoid, the short side of the trapezoid is located at the bottom of the groove, the short side of the trapezoid is a plane, the long side of the trapezoid is located at the opening of the groove, the long side of the trapezoid is an arc surface, and is consistent with the curvature of the inner circular wall of the clamping ring clamp.

[0008] As a preferred solution, the boss is a trapezoidal boss, the short side of the trapezoidal boss is a plane that is consistent with the bottom of the groove, and the long side of the trapezoidal boss is an arc surface that fits the inner circular wall of the clamping ring.

[0009] As a preferred solution, 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 solution, the positioning groove is in a rectangular 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 also includes a nut, an adjusting screw, a handle and an axle pin. The adjusting screw is inserted into the open end of the clamp ring, one end of the adjusting screw is screwed to the nut, and the other end of the adjusting screw is matched with the handle. A gasket is arranged between the handle and the clamp ring, and the axle pin is arranged inside the annular end of the handle and is bolted to the adjusting screw.

[0012] As a preferred embodiment, a positioning hole is provided on the outer wall of the clamping ring clamp, and the positioning hole penetrates one side of the opening end of the clamping ring clamp. A limit screw is provided in the positioning hole, and the limit screw is installed in the positioning hole. One end of the limit screw is arranged between the opening ends of the clamping ring clamp. When the guide block is arranged in the positioning groove, the limit screw is limited by the opening end of the clamping ring clamp to limit the rotation of the guide block.

[0013] As a preferred solution, the limit screw is a machine screw.

[0014] As a preferred solution, the vertical pipe is further provided with a circular hole, and the circular hole is communicated with one end of the notch.

[0015] As a preferred solution, the clamp ring, the insert tube and the stand tube are made of extruded profiles.

[0016] The locking device for preventing the clamp from loosening disclosed in the present invention has the beneficial effect that a positioning groove is provided next to the notch of the vertical pipe, and the clamp slides into the notch of the vertical pipe and then rotates, so that the guide block on the clamp can be clamped into the positioning groove, and the guide block arranged in the positioning groove prevents the insertion tube and the vertical pipe from relative axial movement in a harsh and bumpy environment, thereby improving the safety of use.

[0017] When the guide block is set in the positioning groove and the limit screw is locked in the positioning hole, the side wall of the riser notch can limit the limit screw, limit the rotation angle of the clamp ring, and limit the guide block from detaching from the positioning groove. The insertion tube and the riser cannot move axially, and the safety is good. When the insertion tube and the riser are loose, adjust the nut and the adjusting screw of the eccentric wheel locking mechanism, and lock the clamp ring to make the riser firmly clamp the insertion tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a locking device for preventing the clamp from loosening according to the present invention.

[0019] Figure 2 It is an exploded schematic diagram of a locking device for preventing the clamp ring from loosening according to the present invention.

[0020] Figure 3 The diagram is a top view of the structure of the clamp installed in the insertion tube in the locking device for preventing the clamp from loosening according to the present invention.

[0021] Figure 4 It is a schematic cross-sectional view of the locking device for preventing the clamp from loosening after assembly. DETAILED DESCRIPTION

[0022] The present invention will be further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0023] refer to Figures 1 to 4 A locking device for preventing a clamp from loosening comprises an insertion tube 10 having a groove 11 axially provided along an outer circumferential wall surface, a stand tube 20 having a notch 21 axially provided along a wall body, a clamp 30 sleeved on the outer circumference of the stand tube 20, and an eccentric wheel locking mechanism 40 connected to the open end of the clamp 30, wherein the inner circumferential wall surface of the clamp 30 is provided with a boss 31 matching the groove 11, the boss 31 is connected to the inner circumferential wall surface of the clamp 30 by a guide block 32, the guide block 32 is clamped in the notch 21 of the stand tube 20, a positioning groove 22 is provided on the surface of the stand tube 20, the positioning groove 22 is communicated with one side of the notch 21, and when the clamp 30 is twisted, the guide block 32 can be clamped into the positioning groove 22.

[0024] The cross-section of the groove 11 is a trapezoid, the bottom of the groove 11 is the upper base of the trapezoid, that is, the short base, the bottom of the groove 11 is a plane, 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, the long side of the trapezoid is a circular arc surface, and is consistent with the curvature of the inner circular wall of the clamping ring clamp 30.

[0025] The boss 31 is a trapezoidal boss 31 , the short side of which is a plane and is consistent with the bottom of the groove 11 , and the long side of which is an arc surface and fits with the inner circular wall of the clamp 30 .

[0026] Among them, the trapezoidal boss 31 is made integrally with the clamp ring 30, and 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 limit fit. The design of the trapezoidal protrusion enables it to withstand greater tension and torque, and can provide a reliable connection, ensuring that the insertion tube 10 cannot rotate relative to the vertical tube 20. 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 clamp ring 30, making it less likely to loosen or fall off, and more reliable.

[0027] In another embodiment, the bottom of the groove 11 may be an arc surface, and the boss 31 may also be an arc surface accordingly. When the boss 31 is installed into the groove 11, the contact area of ​​the arc surface is larger, and the friction force generated is greater, so that the insertion tube 10 and the vertical tube 20 are locked more firmly by the clamp ring clamp 30.

[0028] The positioning groove 22 is in a rectangular shape, and the guide block 32 is in the same shape as the positioning groove 22. The positioning groove 22 is in the same shape as the guide block 32, which is conducive to the positioning groove 22 being able to limit the guide block 32, ensuring that the insertion tube 10 and the stand tube 20 do not move relative to each other in the axial direction.

[0029] The eccentric wheel locking mechanism 40 further includes a nut 41, an adjusting screw 42, a handle 43 and an axle pin 44. The adjusting screw 42 is inserted into the open end of the clamp ring 30. One end of the adjusting screw 42 is screwed to the nut 41, and the other end of the adjusting screw 42 is matched with the handle 43. A gasket 45 is provided between the handle 43 and the clamp ring 30. The axle pin 44 is provided inside the annular end of the handle 43 and is bolted to the adjusting screw 42. By adjusting the nut 41 and the adjusting screw 42, the tightening degree of the eccentric wheel locking mechanism 40 can be adjusted.

[0030] Among them, through the cooperation of the handle 43 and the adjusting screw 42, the position of the eccentric wheel can be easily adjusted to achieve quick locking and releasing, and the operation is simple and quick, so that the vertical pipe 20 can be effectively elastically deformed, tightly clamping the insertion tube 10, so as to firmly fix the vertical pipe 20 and the insertion tube 10 to achieve the purpose of safe locking. The insertion tube 10 can also be adjusted by adjusting the eccentric wheel locking mechanism 40. The operation is simple and the flexibility is high.

[0031] The outer wall of the clamp ring 30 is provided with a positioning hole 23, and the positioning hole 23 penetrates one side of the open end of the clamp ring 30. A limit screw 50 is provided in the positioning hole 23, and the limit screw 50 is installed in the positioning hole 23. One end of the limit screw 50 is arranged between the open ends of the clamp ring 30. When the guide block 32 is arranged in the positioning groove 22, the limit screw 50 is limited by the open end of the clamp ring 30 to limit the rotation of the guide block 32. The limit screw 50 is a machine screw.

[0032] Due to the processing error of the notch 21, the cross tube 60 may not be perpendicular to the center plane of the frame during installation. By adjusting the limit screw 50, the angle of the insertion tube 10 is adjusted so that the cross tube 60 is perpendicular to the center plane of the frame and the guide block 32 is not completely separated from the positioning groove 22, that is, the insertion tube 10 and the seat tube 20 cannot move relative to each other in the axial direction. One end of the limit screw 50 can maintain a certain distance from the inner side wall of the notch 21 of the seat tube to ensure that the seat tube 20 does not rotate relatively when subjected to force, so as to further limit the relative rotation of the clamp ring 30 and the insertion tube 10 and the seat tube 20, prevent the guide block 32 from escaping from the positioning groove 22, and allow the insertion tube 10 and the seat tube 20 to move relative to each other, and the reliability is stronger; and maintaining a certain distance allows the clamp ring 30 and the seat tube 20 to have enough adjustable range in the circumferential direction, so that when the insertion tube 10 is installed on the seat tube 20, the cross tube 60 can be easily adjusted to be perpendicular to the center plane of the bicycle frame. When the cross tube 60 is perpendicular to the bicycle frame, the limit screw 50 can be pressed against the inner wall of the seat tube notch 21 to prevent the seat tube 20 and the insertion tube 10 from rotating relative to each other, so that the guide block 32 is clamped in the positioning groove 22, and the seat tube 20, the insertion tube 10 and the clamp ring 30 are relatively more stable and safer.

[0033] The vertical pipe 20 is further provided with a circular hole 24 , and the circular hole 24 is connected to one end of the notch 21 . Generally, the circular hole 24 can relatively ensure the strength of the notch of the vertical pipe 20 .

[0034] The clamp ring 30, the insert tube 10 and the riser 20 are made of extruded profiles. Extruded profiles can provide high-strength and lightweight structures due to their unique manufacturing process, which helps to reduce the weight of the overall structure without sacrificing strength, and are cost-effective and can quickly produce a large number of consistent parts. With the advancement of technology, the insert tube 10 and the riser 20 can also be forged parts.

[0035] The present invention discloses a locking device to prevent the clamp from loosening. A notch 21 is provided on the surface of the riser 20, and a positioning groove 22 is provided on one side of the notch 21. The clamp 30 slides into the notch 21 of the riser 20 and rotates, so that the guide block 32 on the clamp 30 can be clamped into the positioning groove 22. When the insertion tube 10 is installed in the riser 20, the trapezoidal boss 31 on the clamp 30 and the trapezoidal groove 11 of the insertion tube 10 are limitedly installed, which can ensure that the insertion tube 10 cannot rotate relative to the riser 20. The eccentric locking handle 43 is rotated so that the insertion tube 10 is locked with the riser 20, which can form a sufficient circumferential closed loop locking force to prevent the insertion tube 10 from rotating. 0 circumferential rotation activity, since the guide block 32 is arranged in the positioning groove 22, the positioning groove 22 limits the upper and lower surfaces of the guide block 32 to prevent the insertion tube 10 from axially displacing up and down, and the machine screw 50 can also be adjusted to keep one end of the machine screw 50 at a certain distance from the inner side of the notch 21 to ensure that the riser 20 does not rotate too much relative to each other when subjected to force, so as to further limit the relative left and right rotation activity of the clamp ring 30 and the riser 20, and prevent the guide block 32 from sliding out of the positioning groove 22 along the axial direction, so that the connection between the insertion tube 10 and the riser 20 is more firm, and no position deviation will occur after long-term use, and the safety performance is stronger.

[0036] The vertical pipe 20 of the locking device for preventing the clamp from loosening of the present invention is only provided with a notch 21, which improves the rigidity of the vertical pipe 20. A positioning groove 22 is provided on one side of the notch 21. When the clamp 30 squeezes the vertical pipe 20, the contraction of the notch 21 of the vertical pipe 20 is not affected, and the vertical pipe 20 is locked with the insertion tube 10, which has better safety performance.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A locking device for preventing a clamp from loosening, comprising an insertion tube with a groove axially provided along the outer circumferential wall surface, a vertical tube with a notch axially provided along the wall body, a clamp sleeved on the outer circumference of the vertical tube, and an eccentric wheel locking mechanism connected to the open end of the clamp, the inner circumferential wall surface of the clamp is provided with a boss matching the groove, the boss is connected to the inner circumferential wall surface of the clamp by a guide block, the guide block is stuck in the notch of the vertical tube, and is characterized in that: A positioning groove is provided on the surface of the riser, the positioning groove is provided on one side of the notch, the positioning groove is communicated with the notch, and the positioning groove is used to accommodate the guide block.

2. The locking device for preventing the clamp from loosening according to claim 1, characterized in that: The cross section of the groove is a trapezoid, the bottom of the groove is the upper bottom edge of the trapezoid, the two side surfaces of the groove are the waist edges of the trapezoid, and the boss is matched with the groove.

3. The locking device for preventing the clamp from loosening according to claim 2, characterized in that: The bottom of the groove is a plane.

4. The locking device for preventing the clamp from loosening according to claim 2, characterized in that: The bottom of the groove is an arc surface.

5. The locking device for preventing the clamp from loosening according to claim 1, characterized in that: The positioning groove is in a rectangular shape, and the guide block has the same shape as that of the positioning groove.

6. The locking device for preventing the clamp from loosening according to claim 1, characterized in that: The eccentric wheel locking mechanism also includes a nut, an adjusting screw, a handle and an axle pin. The adjusting screw is inserted into the open end of the clamp ring. One end of the adjusting screw is screwed to the nut, and the other end of the adjusting screw cooperates with the handle. A gasket is arranged between the handle and the clamp ring. The axle pin is arranged inside the annular end of the handle and is bolted to the adjusting screw.

7. The locking device for preventing the clamp from loosening according to claim 1, characterized in that: A positioning hole is provided on the outer wall of the clamp ring, and the positioning hole penetrates one side of the opening end of the clamp ring. A limiting screw is provided in the positioning hole, and one end of the limiting screw extends out of the opening end of the clamp ring and is opposite to the side wall of the riser notch. When the guide block is arranged 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, thereby preventing the guide block from detaching from the positioning groove.

8. The locking device for preventing the clamp from loosening according to claim 7, characterized in that: The limiting screw is a machine screw.

9. The locking device for preventing the clamp from loosening according to claim 1, characterized in that: The vertical pipe is also provided with a circular hole, and the circular hole is communicated with one end of the notch.

10. The locking device for preventing the clamp from loosening according to claim 1, characterized in that: The clamp ring, the insert tube and the stand tube are made of extruded profiles.

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