Torsion quick locking mechanism

Abstract

The utility model discloses a torsion quick locking mechanism which comprises an outer pipe, an inner pipe is arranged in the outer pipe, and an expansion locking element attached to the inner wall of the outer pipe is arranged in the outer pipe. The end, close to the expansion locking element, of the inner pipe is provided with a conical pipe plug which is matched with the expansion locking element to drive the expansion locking element to expand outwards to abut against the inner wall of the outer pipe or reset inwards, the conical pipe plug is connected with a screw rod, and the screw rod is in threaded connection with the expansion locking element; the screw rod is sleeved with a torsion spring, the end, away from the conical pipe plug, of the torsion spring is fixedly connected with the screw rod, and the other end of the torsion spring is fixedly connected with the expansion locking element.

Description

Technical Field

[0001] The utility model relates to a torsion quick locking mechanism. Background Art

[0002] Conventional leg locking is disclosed in a Chinese utility model patent document, publication number CN201014158Y, which discloses a tripod, in particular a telescopic leg tripod, comprising three telescopic legs consisting of a plurality of short tubes that are sequentially sleeved together and a telescopic leg adjustment and locking mechanism, wherein the telescopic leg adjustment and locking mechanism comprises a screw rod mounted on the inner short tube end of the telescopic leg, an open expansion sleeve sleeved on the screw rod, and a truncated cone expansion block.

[0003] In the prior art, the leg tube is locked by rotating the telescopic leg tube to drive the truncated cone expansion block and the screw to rotate. Under the action of the screw, the rotation will synchronously move linearly, so that the truncated cone expansion block cooperates with the open expansion sleeve, so that the open expansion sleeve expands outward and presses against the leg tube, thereby locking. When unlocking, it is necessary to rotate the leg tube again to reset the open expansion sleeve inward to achieve unlocking.

[0004] Based on the above, the existing leg tubes need to be manually rotated when locking and unlocking. This locking structure is prone to forgetting to lock, causing the tripod to shrink and cause equipment damage. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a torsion quick locking mechanism.

[0006] A torque quick locking mechanism designed for this purpose comprises an outer tube, an inner tube is arranged inside the outer tube, an expansion locking element is arranged inside the outer tube and fits with the inner wall of the outer tube, one end of the inner tube close to the expansion locking element is provided with a tapered tube plug which cooperates with the expansion locking element to drive the expansion locking element to expand outwards and abut against the inner wall of the outer tube or reset inwards, the tapered tube plug is connected with a screw, and the screw is threadedly connected with the expansion locking element;

[0007] A torsion spring is sleeved on the screw rod, one end of the torsion spring away from the conical pipe plug is fixedly connected to the screw rod, and the other end of the torsion spring is fixedly connected to the expansion locking element.

[0008] Preferably, a limiting hole is provided on the expansion locking element, a limiting groove is provided on the screw rod, one end of the torsion spring is inserted into the limiting hole, and the other end of the torsion spring is inserted into the limiting groove.

[0009] Preferably, the expansion locking element comprises at least two locking blocks, a conical space with an open lower end is provided between the two locking blocks, and the conical pipe plug is movably inserted in the conical space;

[0010] The two locking blocks are commonly connected with a nut, and the screw rod is threadedly connected with the nut;

[0011] The torsion spring is connected to any one of the locking blocks.

[0012] Preferably, a connecting seat is provided at one end of the locking block away from the tapered pipe plug, and the connecting seat is fixedly connected to the nut.

[0013] Preferably, one end of the screw rod away from the tapered pipe plug is connected to a limit screw.

[0014] Preferably, a limiting gasket is provided between the screw head of the limiting screw and the end face of the screw rod.

[0015] Preferably, an escape hole is provided at one end of the tapered pipe plug away from the expansion locking element.

[0016] Compared with the prior art, the utility model is provided with a torsion spring on the screw rod, one end of the torsion spring away from the conical tube plug is fixedly connected to the screw rod, and the other end is fixedly connected to the expansion locking element. The utility model is provided with a torsion spring, and under the action of the torsion spring, it can constrain the upper and lower positions of the conical tube plug, so that the conical tube plug is kept in a position to cooperate with the expansion locking element to achieve locking, avoiding the problem of forgetting to lock and causing the leg tube to extend and retract, causing the tripod to fold. When unlocking, rotating the inner tube can move the conical tube plug in the direction away from the expansion locking element under the action of the screw rod. As the conical tube plug gradually moves away, the expansion locking element resets inward to achieve unlocking with the outer tube. During the unlocking process, the rotation of the screw will synchronously drive the torsion spring to rotate and accumulate force. When the inner tube is unlocked and pulled to the desired position, the inner tube is released. Without the restraining force of the inner tube, the torsion spring releases the force to drive the screw to reverse, thereby driving the tapered tube plug to move toward the expansion locking element, so that the tapered tube plug returns to the locked position, driving the expansion locking element to expand outward and press against the inner wall of the outer tube to form a lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the cross-sectional structural schematic diagrams of the utility model;

[0018] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0019] Figure 3 It is a schematic diagram of the exploded structure of the utility model;

[0020] Figure 4 This is the second schematic diagram of the cross-sectional structure of the present utility model. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1-Figure 4 A torque quick locking mechanism, comprising an outer tube 10, an inner tube 20 is arranged inside the outer tube 10, an expansion locking element 30 is arranged inside the outer tube 10 and is in contact with the inner wall of the outer tube 10, and a tapered tube plug 40 is arranged at one end of the inner tube 20 close to the expansion locking element 30, which cooperates with the expansion locking element 30 to drive the expansion locking element 30 to expand outwards and abut against the inner wall of the outer tube 10 or reset inwards, and the tapered tube plug 40 is connected to a screw 50, and the screw 50 is threadedly connected to the expansion locking element 30;

[0023] The screw rod 50 is sleeved with a torsion spring 60 . One end of the torsion spring 60 away from the tapered pipe plug 40 is fixedly connected to the screw rod 50 , and the other end of the torsion spring 60 is fixedly connected to the expansion locking element 30 .

[0024] The utility model is provided with a torsion spring, under the action of which the torsion spring can constrain the upper and lower positions of the tapered tube plug, so that the tapered tube plug is maintained in a position for locking in cooperation with the expansion locking element, thereby avoiding the problem of the tripod being folded due to the leg tube being extended and retracted due to forgetting to lock.

[0025] When unlocking, the inner tube can be rotated to move the tapered tube plug away from the expansion locking element under the action of the screw. As the tapered tube plug gradually moves away, the expansion locking element resets inward to achieve unlocking with the outer tube. In this unlocking process, the rotation of the screw will synchronously drive the torsion spring to rotate and accumulate force. When the inner tube is completely unlocked and pulled to the required position, the inner tube is released. The inner tube has no restraining force, and the torsion spring releases the force to drive the screw to reverse, thereby driving the tapered tube plug to move toward the expansion locking element, so that the tapered tube plug returns to the locked position, driving the expansion locking element to expand outward and press against the inner wall of the outer tube to form a lock.

[0026] See also Figure 2 and Figure 3 The expansion locking element 30 is provided with a limiting hole 321, the screw rod 50 is provided with a limiting groove 510, one end of the torsion spring 60 is inserted into the limiting hole 321, and the other end of the torsion spring 60 is inserted into the limiting groove 510. In this embodiment, the limiting effect on the two ends of the torsion spring 60 is realized so that when the screw rod rotates relative to the expansion locking element 30, the torsion spring 60 is driven to twist and compress and store force.

[0027] The expansion locking element 30 includes at least two locking blocks 330, a conical space 340 with an opening at the lower end is set between the two locking blocks 330, and the conical pipe plug 40 is movably inserted in the conical space 340; the two locking blocks 330 are commonly connected to a nut 310, and the screw rod 50 is threadedly connected to the nut 310; the torsion spring 60 is connected to any one of the locking blocks 330.

[0028] Furthermore, the tapered space 340 and the tapered tube plug 40 are both arranged in a shape of being small at the top and large at the bottom. When the tapered tube plug 40 moves upward relative to the expansion locking element 30 and gradually plugs into the tapered space 340, under the action of the two conical surfaces, the tapered tube plug 40 will squeeze the locking block 330, causing it to deform outward and abut against the inner wall of the outer tube 10, thereby achieving locking. When the tapered tube plug 40 moves downward relative to the expansion locking element 30, the tapered tube plug 40 is preferably separated from the tapered space 340, and the expansion locking element 30 has space to recover the deformation inward and achieve reset, thereby achieving unlocking.

[0029] Furthermore, the limiting groove 510 is provided at one end of the screw rod 50 away from the tapered tube plug 40 , and the end of the limiting groove 510 away from the tapered tube plug 40 is open.

[0030] See also Figure 2 and Figure 3 A connecting seat 320 is provided at one end of the locking block 330 away from the tapered pipe plug 40 , and the connecting seat 320 is fixedly connected to the nut 310 .

[0031] See also Figure 2 and Figure 3 The end of the screw rod 50 away from the tapered pipe plug 40 is connected to a limit screw 70. The limit screw 70 is used to constrain the torsion spring 60. Since the limit slot 510 is open, the limit screw 70 can prevent the torsion spring 60 from escaping from the limit slot 510.

[0032] See also Figure 2 and Figure 3 A limiting gasket 710 is arranged between the screw head of the limiting screw 70 and the end surface of the screw rod 50 .

[0033] See also Figure 2 and Figure 4 The conical pipe plug 40 is provided with an escape hole 400 at one end away from the expansion locking element 30. The escape hole 400 is used to accommodate the screw rod 50 and the limit screw 70 below in the escape hole 400 when used for the expansion and contraction of the multi-section pipe fitting.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A torque quick locking mechanism, comprising an outer tube (10), an inner tube (20) being arranged inside the outer tube (10), an expansion locking element (30) being arranged inside the outer tube (10) and being in contact with the inner wall of the outer tube (10), a tapered tube plug (40) being arranged at one end of the inner tube (20) close to the expansion locking element (30) and cooperating with the expansion locking element (30) to drive the expansion locking element (30) to expand outwards and abut against the inner wall of the outer tube (10) or to reset inwards, the tapered tube plug (40) being connected to a screw (50), and the screw (50) being threadedly connected to the expansion locking element (30); Features: A torsion spring (60) is sleeved on the screw rod (50), one end of the torsion spring (60) away from the tapered pipe plug (40) is fixedly connected to the screw rod (50), and the other end is fixedly connected to the expansion locking element (30).

2. A torque quick locking mechanism according to claim 1, characterized in that: The expansion locking element (30) is provided with a limiting hole (321), the screw rod (50) is provided with a limiting groove (510), one end of the torsion spring (60) is inserted into the limiting hole (321), and the other end of the torsion spring (60) is inserted into the limiting groove (510).

3. A torque quick locking mechanism according to claim 1, characterized in that: The expansion locking element (30) comprises at least two locking blocks (330), a conical space (340) with an opening at a lower end is arranged between the two locking blocks (330), and the conical pipe plug (40) is movably inserted in the conical space (340); The two locking blocks (330) are commonly connected to a nut (310), and the screw rod (50) is threadedly connected to the nut (310); The torsion spring (60) is connected to any one of the locking blocks (330).

4. A torque quick locking mechanism according to claim 3, characterized in that: A connecting seat (320) is provided at one end of the locking block (330) away from the tapered pipe plug (40), and the connecting seat (320) is fixedly connected to the nut (310).

5. A torque quick locking mechanism according to claim 1, characterized in that: One end of the screw rod (50) away from the tapered pipe plug (40) is connected to a limit screw (70).

6. A torque quick locking mechanism according to claim 5, characterized in that: A limiting gasket (710) is provided between the screw head of the limiting screw (70) and the end surface of the screw rod (50).

7. A torque quick locking mechanism according to claim 1, characterized in that: An escape hole (400) is provided at one end of the tapered pipe plug (40) away from the expansion locking element (30).

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