Locking gapless rotary damping structure

Abstract

The utility model discloses a gapless locking rotary damping structure, and relates to the technical field of mechanical hardware. Comprising a rotating seat, rear fork pipes are arranged at the two ends of the rotating seat, and rotating damping structures are arranged at the joints of the rear fork pipes and the rotating seat. Through matched compression of a double-step iron washer and a clearance plastic bushing in the rotary damping structure and threaded interlocking of a locking nut and a screw rod, no clearance and uniform damping are achieved when the rear fork pipe set rotates, and it is ensured that folding automatic positioning is accurate and stable; the knob screw is meshed with the stud of the rear fork pipe cap to form axial locking force, shaking in the using state is effectively eliminated, the limiting design of the linear clamping ring is matched, it is guaranteed that when the knob screw is separated from the stud, the knob screw and the rotating base are still kept connected and prevented from falling off, rapid unlocking can be achieved, the rear fork pipe can be folded, and the overall structure integrates high-rigidity fixing and convenient operation; equipment reliability and user experience are remarkably improved, and the use requirements of users are met.

Description

A lock-up-free rotational damping structure Technical Field

[0001] This utility model relates to the field of mechanical hardware technology, specifically a lock-up-free rotary damping structure. Background Technology

[0002] Rotary locking mechanisms are commonly used in devices that require frequent folding, such as folding bicycles and medical device supports. However, existing rotary locking mechanisms still have the following shortcomings in use:

[0003] In existing technologies, traditional rotary locking structures are prone to poor stability due to gaps, uneven damping affecting positioning accuracy, threaded fasteners are prone to loosening and lack anti-loosening design, operation is complicated and it is difficult to balance rigid fixation and quick unlocking, resulting in unsatisfactory performance. Summary of the Invention

[0004] This invention provides a lock-up-free rotational damping structure to solve the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lock-up gapless rotational damping structure, including a rotating seat, both ends of which are provided with rear fork tubes, and a rotational damping structure is provided at the connection between the rear fork tubes and the rotating seat.

[0006] Furthermore, both ends of the rotating base are provided with connecting grooves and fixing holes located at the top and bottom of the connecting grooves.

[0007] Furthermore, one end of the rear fork tube extends into the interior of the connecting groove and is provided with a connecting hole that is coaxially arranged with the fixing hole.

[0008] Furthermore, the rotational damping structure includes a gap plastic bushing and a double-stage Teflon that are sequentially disposed inside the fixing hole.

[0009] Furthermore, the rotary damping structure also includes a locking nut and a locking screw, one end of which is inserted through two opposite fixing holes and interlocked by threads.

[0010] Furthermore, a rear fork tube cap is fixedly installed on one side of the rear fork tube by screws.

[0011] Furthermore, a stud is provided on one side of the rear fork tube cap, with one end extending into the interior of the rear fork tube.

[0012] Furthermore, a mounting hole corresponding to the stud is provided on one side of the inner wall of the connecting groove.

[0013] Furthermore, it also includes a knob screw, one end of which passes through the mounting hole and is screwed into the interior of the stud.

[0014] Furthermore, a linear retaining ring is also engaged at one end of the knob screw that passes through the mounting hole, and the outer diameter of the linear retaining ring is larger than the inner diameter of the mounting hole.

[0015] Compared with the prior art, this utility model provides a lock-up-free rotary damping structure, which has the following beneficial effects:

[0016] This lock-in gapless rotary damping structure, through the compression of the double-stage Teflon and the gap plastic bushing in the rotary damping structure, combined with the threaded interlocking of the locking nut and the screw, achieves gapless and uniform damping during the rotation of the rear fork tube assembly, ensuring accurate and stable automatic folding positioning. The engagement of the knob screw with the stud of the rear fork tube cap forms an axial locking force, effectively eliminating wobbling during use. Combined with the limiting design of the linear retaining ring, it ensures that the knob screw remains connected to the rotating seat to prevent it from falling off when it is disengaged from the stud, while also allowing for quick unlocking to achieve rear fork tube folding. The overall structure balances high rigidity and convenient operation, significantly improving equipment reliability and user experience, and meeting user needs. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the structure of this utility model;

[0018] Figure 2 is a side view of the structure of this utility model;

[0019] Figure 3 is a schematic diagram of the rear fork tube and the swivel seat of this utility model in a separated state;

[0020] Figure 4 is an exploded view of the rotational damping structure of this utility model;

[0021] Figure 5 is a schematic diagram of the rear fork tube cap and knob screw structure of this utility model;

[0022] Figure 6 is a cross-sectional view of the rotational damping structure of this utility model.

[0023] In the diagram: 1. Rotary seat; 11. Connecting groove; 12. Fixing hole; 13. Mounting hole; 2. Rear fork tube; 21. Connecting hole; 3. Rotary damping structure; 31. Clearance plastic bushing; 32. Double-stage Tevaser; 33. Locking nut; 34. Locking screw; 4. Rear fork tube cap; 41. Stud; 5. Knob screw; 51. Linear retaining ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please refer to Figures 1-6. This utility model discloses a lock-up gapless rotational damping structure, including a rotating seat 1. Both ends of the rotating seat 1 are provided with rear fork tubes 2. A rotational damping structure 3 is provided at the connection between the rear fork tubes 2 and the rotating seat 1. The two rear fork tubes 2 are the left rear fork tube 2 and the right rear fork tube 2.

[0026] Specifically, both ends of the rotating seat 1 are provided with connecting grooves 11 and fixing holes 12 located at the top and bottom of the connecting grooves 11. One end of the rear fork tube 2 extends into the interior of the connecting groove 11 and is provided with a connecting hole 21 coaxially arranged with the fixing hole 12.

[0027] In this embodiment, the end of the rear fork tube 2 with the connecting hole 21 is inserted into the interior of the connecting groove 11, and the connecting hole 21 is aligned with the fixing hole 12 on the same axis, so that the rotation damping structure 3 can be installed.

[0028] Specifically, the rotary damping structure 3 includes a gap plastic bushing 31 and a double-stage Teflon 32 sequentially disposed inside the fixing hole 12. The rotary damping structure 3 also includes a locking nut 33 and a locking screw 34. One end of the locking nut 33 and the locking screw 34 are respectively inserted into two opposite fixing holes 12 and interlocked by threads.

[0029] In this embodiment, after the locking nut 33 and locking screw 34 are tightened, the gap plastic bushing 31 is pressed by the double-stage thorium 32. The cross-section of the double-stage thorium 32 is T-shaped, and the fixing hole 12 is a countersunk hole. The double-stage thorium 32 can be stuck in the fixing hole 12 without excessively squeezing the gap plastic bushing 31. The top and bottom of one end of the rear fork tube 2 are provided with circular grooves coaxial with the connecting hole 21. The gap plastic bushing 31 is partially embedded in the inside of the circular groove, which further ensures the stability of the gap plastic bushing 31. The setting of the rotation damping structure 3 allows the two rear fork tubes 2 to be automatically positioned by rotational resistance when the user folds the two rear fork tubes 2, making it more convenient to use.

[0030] Specifically, a rear fork tube cap 4 is fixedly installed on one side of the rear fork tube 2 by screws. A stud 41 extending into the interior of the rear fork tube 2 is provided on one side of the rear fork tube cap 4. A mounting hole 13 corresponding to the stud 41 is provided on one side of the inner wall of the connecting groove 11. A knob screw 5 is also included. One end of the knob screw 5 passes through the mounting hole 13 and is screwed into the interior of the stud 41. A linear retaining ring 51 is also engaged on the end of the knob screw 5 that passes through the mounting hole 13. The outer diameter of the linear retaining ring 51 is larger than the inner diameter of the mounting hole 13.

[0031] In this embodiment, the knob screw 5 includes a screw rod and a knob sleeved on one end of the screw rod. The knob design makes it convenient for the user to turn the screw rod. The outer diameter of the linear retaining ring 51 is larger than the inner diameter of the mounting hole 13, so that after one end of the knob screw 5 is disconnected from the stud 41, the knob screw 5 will not slip out of the mounting hole 13. This design makes it convenient to tighten the rear fork tube 2 again, making the operation more convenient and eliminating concerns about parts falling off.

[0032] During installation, insert the left and right rear fork tubes 2 into the two connecting slots 11 respectively, aligning the connecting holes 21 with the fixing holes 12. Insert the gap plastic bushing 31 into the fixing hole 12, and then insert the double-stage Teflon 32 into the fixing hole 12, pressing it against the gap plastic bushing 31. Insert the locking nut 33 into the fixing hole 12, and then insert the locking screw 34 into the other corresponding fixing hole 12 and screw it into the locking nut 33 to tighten it. At this point, rotating the rear fork tube 2 will achieve a backlash-free rotation with a damping effect. Insert one end of the knob screw 5 through the mounting hole 13 and secure it with a cable. The retaining ring 51 is then used to fix the rear fork tube cap 4 to one side of the rear fork tube 2 with screws. When the rear fork tube 2 rotates and comes close to the side wall of the connecting groove 11, the stud 41 and the knob screw 5 are opposite each other. At this time, the knob screw 5 is rotated so that one end of the knob screw 5 is screwed into the stud 41. The rear fork tube cap 4 pulls the rear fork tube 2 tightly against the side wall of the connecting groove 11, thus fixing the rear fork tube 2. This can prevent the rear fork tube 2 from shaking during use and ensure the stability of the rear fork tube 2 in use. Conversely, by reversing the knob screw 5 and separating it from the stud 41, the left and right rear fork tubes 2 can be rotated and closed relative to each other.

[0033] In summary, this lock-up-free rotary damping structure, through the compression of the double-stage Teflon 32 and the gap plastic bushing 31 in the rotary damping structure 3, combined with the threaded interlocking of the locking nut 33 and the screw, achieves zero gap and uniform damping during the rotation of the two rear fork tubes, ensuring accurate and stable automatic folding positioning. The engagement of the knob screw 5 with the stud 41 of the rear fork tube cap 4 forms an axial locking force, effectively eliminating shaking during use. Combined with the limiting design of the linear retaining ring 51, it ensures that the knob screw 5 remains connected to the rotating seat 1 to prevent detachment when it is disengaged from the stud 41, and can also be quickly unlocked to allow the rear fork tube 2 to fold. The overall structure balances high rigidity and convenient operation, significantly improving equipment reliability and user experience, and meeting user needs.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A locking, gapless rotary damping structure, comprising a rotating base (1), characterized in that: Both ends of the swivel seat (1) are provided with rear fork tubes (2), and a rotation damping structure (3) is provided at the connection between the rear fork tubes (2) and the swivel seat (1); both ends of the swivel seat (1) are provided with connecting grooves (11) and fixing holes (12) located at the top and bottom of the connecting grooves (11); one end of the rear fork tube (2) extends into the interior of the connecting groove (11) and is provided with a connecting hole (21) coaxially arranged with the fixing hole (12); the rotation damping structure (3) includes a gap plastic bushing (31) and a double-stage Teflon (32) arranged sequentially inside the fixing hole (12); the rotation damping structure (3) also includes a locking nut (33) and a locking screw (34), one end of the locking nut (33) and the locking screw (34) respectively pass through two opposite fixing holes (12) and are interlocked by threads.

2. The locking gapless rotational damping structure according to claim 1, characterized in that: A rear fork tube cap (4) is fixedly installed on one side of the rear fork tube (2) by screws.

3. The locking gapless rotational damping structure according to claim 2, characterized in that: A stud (41) is provided on one side of the rear fork tube cap (4) with one end extending into the interior of the rear fork tube (2).

4. The locking gapless rotational damping structure according to claim 1, characterized in that: The inner wall of the connecting groove (11) is provided with a mounting hole (13) corresponding to the stud (41) on one side.

5. The locking gapless rotational damping structure according to claim 1, characterized in that: It also includes a knob screw (5), one end of which passes through the mounting hole (13) and is screwed into the interior of the stud (41).

6. The locking gapless rotational damping structure according to claim 5, characterized in that: A linear retaining ring (51) is also attached to one end of the knob screw (5) that passes through the mounting hole (13). The outer diameter of the linear retaining ring (51) is larger than the inner diameter of the mounting hole (13).

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