Rotary tension limiting mechanism

Abstract

A rotary tensioning and limiting mechanism includes a locking washer, a connecting sleeve, an internally threaded tensioning knob, a limiting plug, a fixing screw, and an externally threaded connecting support rod. The locking washer is engaged inside the internally threaded tensioning knob, and the internally threaded tensioning knob can rotate relative to the locking washer. A connecting member with an internal thread is provided at the upper end of the floor frame. The connecting sleeve is installed between the connecting member and the locking washer. The head of the fixing screw is threadedly connected to the connecting member. The fixing screw presses the connecting sleeve and the locking washer axially toward the connecting member through the limiting plug. The externally threaded connecting support rod is located between the internally threaded tensioning knob and the locking washer and is threadedly connected to the internally threaded tensioning knob. The locking washer is a conical cylinder, and the inner hole of the externally threaded connecting support rod is a conical hole adapted to the conical cylinder. When the internally threaded tensioning knob is rotated clockwise, the internally threaded tensioning knob causes the locking washer to move downward. The conical hole wall of the externally threaded connecting support rod contacts and presses against the outer wall of the conical surface of the locking washer, thereby locking the connecting member to the externally threaded connecting support rod.

Description

Technical Field

[0001] This utility model relates to the field of floor stand technology, specifically to a rotating tensioning and limiting mechanism. Background Technology

[0002] Traditional fixed floor stands cannot be rotated for positioning. Some floor stands on the market can be rotated for positioning, such as snap-on floor stands. However, snap-on floor stands only support a limited number of adjustment levels and cannot lock at any angle. Moreover, existing floor stands generally have poor stability when not locked and are prone to sliding due to external impact or their own weight. Operator misoperation can also easily cause parts to separate accidentally, posing a safety hazard. Therefore, there is an urgent need for a rotating tensioning and limiting mechanism to solve the above problems. Utility Model Content

[0003] In view of this, a rotary tensioning limit mechanism is provided that supports locking at any angle, has strong stability, and is easy to operate.

[0004] A rotary tensioning and limiting mechanism is provided for allowing the upper end of a floor stand to rotate freely relative to its lower end and lock at any angle. The mechanism includes a locking washer, a connecting sleeve, an internally threaded tensioning knob, a limiting plug, a fixing screw, and an externally threaded connecting support rod. The locking washer is engaged with the internally threaded tensioning knob, which can rotate relative to the locking washer. The bottom of the upper end of the floor stand has an internally threaded connector. The connecting sleeve is installed between the connector and the locking washer. The head of the fixing screw is threadedly connected to the connector. The fixing screw secures the connecting sleeve via the limiting plug. The cylinder and locking pad are pressed axially against the connector. The external threaded connecting support rod is located between the internal threaded tightening knob and the locking pad and is threadedly connected to the internal threaded tightening knob. The locking pad is a conical cylinder. The inner hole of the external threaded connecting support rod is a conical hole adapted to the conical cylinder. The conical direction of the conical cylinder or conical hole is constructed such that when the internal threaded tightening knob is rotated clockwise, the internal threaded tightening knob causes the locking pad to move downward. The conical hole wall of the external threaded connecting support rod contacts and presses against the outer wall of the conical surface of the locking pad, generating friction and radial pressure to lock the connector to the external threaded connecting support rod.

[0005] Furthermore, the larger end of the outer diameter of the conical cylinder is close to or abuts against the connector, the smaller end of the outer diameter of the conical cylinder is close to or abuts against the limiting plug, and the taper of the conical hole is the same as the taper of the conical cylinder.

[0006] Furthermore, the locking pad has a groove at one end near the connector, and the internal thread tightening knob has a protruding ring corresponding to the groove. The distance between the upper and lower groove walls of the groove is greater than the ring diameter of the protruding ring. When the locking pad is inserted into the internal thread tightening knob, the protruding ring is engaged in the groove. The gap between the protruding ring and the groove allows the internal thread tightening knob to rotate relative to the locking pad without axially moving relative to the locking pad. Thus, when the internal thread tightening knob is rotated, it can engage or disengage with the external thread connecting support rod along the thread engagement path.

[0007] Furthermore, the limiting plug includes a first stage, in which a through hole is provided in the middle, and the fixing screw passes through the through hole and is clamped to the end face of the through hole facing away from the connector.

[0008] Furthermore, the limiting plug also includes a second stage connected to the first stage, and the connecting member includes a third stage and a fourth stage connected to the third stage. The third stage is opposite to the first stage and has an internal threaded hole corresponding to the through hole to threadedly connect to the fixing screw. The connecting sleeve and locking washer are pressed between the step surface of the second stage and the step surface of the fourth stage.

[0009] Furthermore, the internal thread tightening knob has a cylindrical structure, the outer wall of the internal thread tightening knob is provided with an anti-slip structure, and the inner wall of the internal thread tightening knob is provided with an internal thread structure.

[0010] Furthermore, the externally threaded connection support rod includes a first end, the inner hole of the first end is the tapered hole, the outer wall of the first end has an external thread structure, and the internally threaded tightening knob is threadedly connected to the first end.

[0011] Furthermore, the locking pad is an elastic plastic part, and the locking pad has multiple axially extending strip-shaped notches in the circumferential direction to reduce the continuity of the material and thus enhance the elastic deformation capability of the locking pad.

[0012] Furthermore, the axes of the connecting sleeve, locking washer, internal thread tightening knob, limit plug, fixing screw, and external thread connecting support rod are all located on the same straight line.

[0013] Furthermore, the inner wall of the internal thread tightening knob is provided with an internal thread near the convex ring, and the inner wall of the internal thread tightening knob away from the convex ring is a smooth surface.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: First, this rotary tightening and loosening limiting mechanism uses a tapered locking pad to engage with the tapered hole of the external threaded support rod. When the internal thread tightening and loosening knob is rotated clockwise, a tapered friction force and radial pressure are generated by the contact between the tapered surface and the tapered surface, so that the mechanism can be locked at any rotation angle and unlocked by rotating counterclockwise. The unlocking process does not require any additional tools and is easy to operate.

[0015] Secondly, the fixing screw of this rotary tensioning and limiting mechanism presses the connecting sleeve and locking pad tightly against the connecting part through the limiting plug to form a unified whole that is not easily separated. Furthermore, the height of the connecting sleeve and the height of the locking pad are the same, meaning there is no axial gap or play in their travel. The locking pad is also engaged inside the internal threaded tensioning knob, allowing the external threaded connecting support rod to act as a stop when the mechanism is not locked, preventing components from falling off and avoiding safety hazards. This also allows the upper end of the floor frame to rotate freely and stably relative to the lower end of the floor frame when not locked. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a rotating tension limiting mechanism and a floor frame assembly according to an embodiment of this utility model.

[0017] Figure 2 This is an exploded view of the assembly of a rotary tensioning limit mechanism and a floor frame according to an embodiment of this utility model.

[0018] Figure 3 This is a cross-sectional schematic diagram of a rotating tension limiting mechanism and a floor frame assembly according to an embodiment of this utility model.

[0019] In the picture, 1. Upper end of the floor frame; 2. Lower end of the floor frame; 3. Locking pad; 4. Connecting sleeve; 5. Internal threaded tightening knob; 6. Limiting plug; 7. Fixing screw; 8. External threaded connecting support rod; 9. Connector; 10. Slot; 11. Raised ring; 12. First stage; 13. Through hole; 14. Second stage; 15. Third stage; 16. Fourth stage; 17. Internal threaded hole; 18. First end; 19. Strip notch. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 3This illustration shows a rotating tensioning and limiting mechanism provided by an embodiment of the present invention, used to allow the upper end 1 of the floor frame to rotate freely relative to the lower end 2 of the floor frame and to lock at any angle. The rotating tensioning and limiting mechanism includes a locking pad 3, a connecting sleeve 4, an internally threaded tensioning knob 5, a limiting plug 6, a fixing screw 7, and an externally threaded connecting support rod 8. The locking pad 3 is engaged inside the internally threaded tensioning knob 5, and the internally threaded tensioning knob 5 can rotate relative to the locking pad 3. The bottom of the upper end 1 of the floor frame is provided with a connecting member 9 with an internal thread. The connecting sleeve 4 is installed between the connecting member 9 and the locking pad 3. The head of the fixing screw 7 is threadedly connected to the connecting member 9. The fixing screw 7 connects the connecting sleeve 4 and the locking pad 3 along the axis through the limiting plug 6. The connecting sleeve 4, locking pad 3, limiting plug 9, fixing screw 7, and connecting member 9 are pressed together to form an integral structure. The external threaded connecting support rod 8 is located between the internal threaded tightening knob 5 and the locking pad 3 and is threadedly connected to the internal threaded tightening knob 5. The locking pad 3 is a conical cylinder. The inner hole of the external threaded connecting support rod 8 is a conical hole adapted to the conical cylinder. The conical direction of the conical cylinder or conical hole is designed such that when the internal threaded tightening knob 5 is rotated clockwise, the internal threaded tightening knob 5 drives the locking pad 3 to move downward. The conical hole wall of the external threaded connecting support rod 8 contacts and presses against the outer wall of the conical surface of the locking pad 3, generating friction and radial pressure to lock the connecting member 9 to the external threaded connecting support rod 8.

[0022] Specifically, the larger end of the outer diameter of the conical cylinder is close to or abuts against the connector 9, the smaller end of the outer diameter of the conical cylinder is close to or abuts against the limiting plug 6, and the taper of the conical hole is the same as the taper of the conical cylinder.

[0023] Specifically, the locking pad 3 has a groove 10 at one end near the connector 9, and the internal thread tightening knob 5 has a protruding ring 11 corresponding to the groove 10. The distance between the upper and lower groove walls of the groove 10 is greater than the ring diameter of the protruding ring 11. When the locking pad 3 is inserted into the internal thread tightening knob 5, the protruding ring 11 is engaged in the groove 10. The protruding ring 11 and the groove 10 are in clearance fit so that the internal thread tightening knob 5 can rotate relative to the locking pad 3 without making axial movement relative to the locking pad 3. Thus, when the internal thread tightening knob 5 is rotated, it can engage or disengage with the external thread connecting support rod 8 along the thread engagement path. More specifically, it can be understood that the internal thread tightening knob 5 is equivalent to a nut, and the external thread connecting support rod 8 is a screw. The internal thread tightening knob 5 can be rotated into the external thread connecting support rod 8 or rotated out in the opposite direction.

[0024] Specifically, the limiting plug 6 includes a first stage 12, with a through hole 13 in the middle of the first stage 12. The fixing screw 7 passes through the through hole 13 and is clamped to the end face of the through hole 13 facing away from the connector 9.

[0025] More specifically, the limiting plug 6 also includes a second stage 14 connected to the first stage 12, and the connector 9 includes a third stage 15 and a fourth stage 16 connected to the third stage 15. The third stage 15 is opposite to the first stage 12 and the third stage 15 is provided with an internal threaded hole 17 corresponding to the through hole 13 to threadedly connect to the fixing screw 7. The connecting sleeve 4 and the locking washer 3 are pressed between the stepped surface of the second stage 14 and the stepped surface of the fourth stage 16.

[0026] In some specific embodiments, when the internal thread tightening knob 5 is rotated clockwise, it engages with the external thread connecting support rod 8, generating axial displacement. This forces the locking pad 3 to move axially downward along the tapered hole. Since the locking pad 3 is a tapered elastic plastic part, its tapered surface contacts the tapered hole wall of the external thread connecting support rod 8, and under radial pressure, it undergoes elastic deformation, generating friction and radial clamping pressure. During this process, the locking pad 3, the connecting sleeve 4, and the step surface of the second stage 14 of the limiting plug 6 and the connecting piece 9 are... The step surface of the fourth stage 16 is pressed, which causes the upper end 1 of the floor frame to move down. As the internal thread tightening knob 5 continues to rotate clockwise, the contact pressure of the conical surface gradually increases, eventually causing the connector 9 and the external thread connecting support rod 8 to form a locked state. When unlocking, the internal thread tightening knob 5 is rotated counterclockwise, and the thread engagement causes the locking pad 3 to move up. The contact pressure of the conical surface is gradually released, and the friction of the conical surface gradually decreases. At this time, the constraint between the connector 9 and the external thread connecting support rod 8 is released, and the upper end 1 of the floor frame can rotate freely.

[0027] Specifically, the internally threaded tightening knob 5 has a cylindrical structure, and its outer wall is provided with an anti-slip structure, while its inner wall is provided with an internal thread structure. In some specific embodiments, the outer wall of the internally threaded tightening knob 5 is provided with anti-slip textures, or an anti-slip rubber sleeve can be placed on the internally threaded tightening knob 5 to increase friction and prevent slippage.

[0028] Specifically, the external threaded connection support rod 8 includes a first end 18, the inner hole of the first end 18 is the tapered hole, the outer wall of the first end 18 has an external thread structure, and the internal threaded tightening knob 5 is threadedly connected to the first end 18.

[0029] Specifically, the locking pad 3 is an elastic plastic part, and the locking pad 3 has multiple axially extending strip-shaped notches 19 in the circumferential direction to reduce the continuity of the material and thus enhance the elastic deformation capability of the locking pad 3. More specifically, the notch design makes it easier for the locking pad 3 to undergo local deformation under force, thereby improving the locking effect.

[0030] Specifically, the axes of the connecting sleeve 4, locking washer 3, internal thread tightening knob 5, limiting plug 6, fixing screw 7, and external thread connecting support rod 8 are all located on the same straight line.

[0031] More specifically, the inner wall of the internal thread tightening knob 5 is provided with an internal thread near the convex ring 11, and the inner wall of the internal thread tightening knob 5 away from the convex ring 11 is a smooth surface.

[0032] In summary, this rotary tensioning and limiting mechanism, through the cooperation of the conical locking pad 3 and the conical hole of the external threaded connecting support rod 8, generates conical friction and radial pressure when the internal threaded tensioning knob 5 is rotated clockwise, allowing the mechanism to be locked at any rotation angle and unlocked by rotating counterclockwise. The unlocking process requires no additional tools and is easy to operate. The fixing screw 7 of this rotary tensioning and limiting mechanism presses the connecting sleeve 4 and the locking pad 3 against the connecting piece 9 through the limiting plug 6 to form a whole that is not easy to separate. The height of the connecting sleeve 4 is the same as the height of the locking pad 3, that is, there is no gap or travel play between the two in the axial direction. The locking pad 3 is also engaged inside the internal threaded tensioning knob 5, so that when the mechanism is not locked, the external threaded connecting support rod 8 can act as a stop to prevent the parts from falling off, avoid safety hazards, and allow the upper end 1 of the floor frame to rotate freely and stably relative to the lower end 2 of the floor frame when it is not locked.

[0033] It should be noted that this utility model is not limited to the above-described embodiments. Based on the inventive spirit of this utility model, those skilled in the art can make other changes, and these changes made based on the inventive spirit of this utility model should be included within the scope of protection claimed by this utility model.

Claims

1. A rotary tensioning limiting mechanism for allowing the upper end of a floor stand to rotate freely relative to the lower end of the floor stand and to lock at any angle, characterized in that, The rotating tensioning and limiting mechanism includes a locking washer, a connecting sleeve, an internally threaded tensioning knob, a limiting plug, a fixing screw, and an externally threaded connecting support rod. The locking washer is engaged with the internally threaded tensioning knob, and the internally threaded tensioning knob can rotate relative to the locking washer. The bottom of the upper end of the floor frame is provided with a connecting member with an internal thread. The connecting sleeve is installed between the connecting member and the locking washer. The head of the fixing screw is threadedly connected to the connecting member. The fixing screw, through the limiting plug, presses the connecting sleeve and the locking washer axially toward the connecting member. The externally threaded... The connecting support rod is located between the internal threaded tightening knob and the locking washer and is threadedly connected to the internal threaded tightening knob. The locking washer is a conical cylinder. The inner hole of the external threaded connecting support rod is a conical hole adapted to the conical cylinder. The conical direction of the conical cylinder or conical hole is configured such that when the internal threaded tightening knob is rotated clockwise, the internal threaded tightening knob causes the locking washer to move downward. The conical hole wall of the external threaded connecting support rod contacts and presses against the outer wall of the conical surface of the locking washer, generating friction and radial pressure to lock the connecting piece to the external threaded connecting support rod.

2. A rotary tension limiting mechanism as claimed in claim 1, wherein, The larger end of the outer diameter of the conical cylinder is close to or abuts against the connector, and the smaller end of the outer diameter of the conical cylinder is close to or abuts against the limiting plug. The taper of the conical hole is the same as the taper of the conical cylinder.

3. A rotating tension limiting mechanism as claimed in claim 1, wherein, The locking pad has a slot at one end near the connector, and the internal thread tightening knob has a protruding ring corresponding to the slot. The distance between the upper and lower walls of the slot is greater than the diameter of the protruding ring. When the locking pad is inserted into the internal thread tightening knob, the protruding ring is engaged in the slot. The protruding ring and the slot are fitted with a clearance so that the internal thread tightening knob can rotate relative to the locking pad without axially moving relative to the locking pad. Thus, when the internal thread tightening knob is rotated, it can engage or disengage with the external thread connecting support rod along the thread engagement path.

4. A rotating tension limiting mechanism as claimed in claim 1, wherein, The limiting plug includes a first stage, with a through hole in the middle of the first stage. The fixing screw passes through the through hole and is clamped to the end face of the through hole facing away from the connector.

5. A rotary tension limiting mechanism as claimed in claim 4, wherein, The limiting plug also includes a second stage connected to the first stage. The connector includes a third stage and a fourth stage connected to the third stage. The third stage is opposite to the first stage and has an internal threaded hole corresponding to the through hole to threadedly connect to the fixing screw. The connecting sleeve and locking washer are pressed between the step surface of the second stage and the step surface of the fourth stage.

6. A rotating tension limiting mechanism as claimed in claim 1, wherein, The internal thread tightening knob has a cylindrical structure, and the outer wall of the internal thread tightening knob is provided with an anti-slip structure, while the inner wall of the internal thread tightening knob is provided with an internal thread structure.

7. A rotating tension limiting mechanism as claimed in claim 1, wherein, The external threaded connection support rod includes a first end, the inner hole of the first end is the tapered hole, the outer wall of the first end has an external thread structure, and the internal thread tightening knob is threadedly connected to the first end.

8. A rotating tension limiting mechanism as claimed in claim 1, wherein, The locking pad is an elastic plastic part, and the locking pad has multiple axially extending strip-shaped notches in the circumferential direction to reduce the continuity of the material and thus enhance the elastic deformation capability of the locking pad.

9. A rotating tension limiting mechanism as claimed in claim 1, wherein, The axes of the connecting sleeve, locking washer, internal thread tightening knob, limit plug, fixing screw, and external thread connecting support rod are all located on the same straight line.

10. A rotary tensioning limiting mechanism as described in claim 3, characterized in that, The inner wall of the internal thread tightening knob is provided with an internal thread near the convex ring, and the inner wall of the internal thread tightening knob away from the convex ring is a smooth surface.

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