Self-locking reverse rotation preventing on-door horizontal bar with combined length

Abstract

The invention belongs to the technical field of gymnastic horizontal bars and provides a self-locking reverse rotation preventing on-door horizontal bar with a combined length. The horizontal bar is small in bending deformation, high in reliability and better in stress, has automatic locking and reverse rotation preventing functions, can adapt to different installation widths and is good in universality. The self-locking reverse rotation preventing on-door horizontal bar comprises a horizontal bar pipe, a rubber pad, a length adjusting device and the like; the length adjusting device is arranged on one side of the horizontal bar, a self-locking rubber cushion seat (3) is in planar contact with an adjusting rod (5) and is in non-fastened connection with the rod in a 360-degree rotating mode, a reverse rotation preventing automatic limiting locking device is arranged between the rubber cushion seat (3) and the adjusting rod (5), and tensioning devices for generating axial tensioning forces by utilizing pitch difference are arranged at two ends of the horizontal bar. The horizontal bar main pipe (9) is connected with an extension pipe (11) through an independent threaded connecting piece (10), a detachable external hanging ring (7) with an external hanging hole is arranged at the threaded connecting position of the horizontal bar pipe, and a rigid rotating sliding sleeve (13) which is in clearance fit with the pipe is arranged on the horizontal bar pipe.

Description

technical field [0001] The invention relates to the technical field of gymnastics horizontal bars, in particular to a self-locking anti-reverse door upper horizontal bar with a combinable length. Background technique [0002] The horizontal bar on the door is a kind of fitness equipment that is easy to install and adapt to different installation widths. It can be installed and used on ordinary doors, aisles or between walls. It is widely used because of its simple structure and convenient installation. [0003] The prior art includes a retractable horizontal bar intermediate tube, a screw rod with different left and right directions of rotation is fixed in the intermediate tube, and forward and reverse telescopic rods are respectively threadedly connected to both ends of the screw rod, and a friction cushion is installed at both ends of the telescopic rod , when the middle pipe is rotated, the left and right telescopic rods are extended, and are fixed on the door frame or wa...

AI Technical Summary

Problems solved by technology

[0003] The prior art includes a retractable horizontal bar intermediate tube, a screw rod with different left and right directions of rotation is fixed in the intermediate tube, and forward and reverse telescopic rods are respectively threadedly connected to both ends of the screw rod, and a friction cushion is installed at both ends of the telescopic rod , when the middle pipe is rotated, the left and right telescopic rods are extended, and are fixed on the door frame or wall by friction. If the middle pipe is rotated in the opposite direction unintentionally during use, the tightening force of the horizontal bar will be reduced until it is completely loose; in order to overcome the above The disadvantage is that there are many locking schemes to prevent the horizontal bar from reversing, such as the patent number: 201420662732.2, which discloses a horizontal bar on the anti-loosening door. One end of the telescopic tube is inserted in the middle tube, and the other end is pushed against the door frame or wall. Above, there is an adjustable clamp clamped on the telescopic tube. After it is installed in place, use the clamp to fix the upper limit of the telescopic tube to prevent the telescopic tube from retracting into the main pipe. It can easily overcome the locking force of the clamp, but there is still a risk of loosening, and some schemes have a cumbersome structure and the effect is not ideal; The gravity under it will easily bend, and the horizontal bar will loosen if it exceeds a certain weight, which poses a serious safety hazard; and due to structural limitations, the length adjustment range of the horizontal bar is relatively small. In order to adapt to different installation widths, the length of the horizontal bar must be set. There are many specifications of different lengths, and they cannot be used universally, resulting in waste of resources

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