84results about How to "Prevent axial rotation" patented technology

The invention relates to an actuating mechanism of acupuncturing analogue meter, which comprises a lift and thrust motor, a twist motor, an outer sleeve, an inner sleeve, a gear, a gear frame, an end cap and a connecting shaft device. The lift and thrust motor is arranged on one side of the outer sleeve; the outer sleeve is coincided with the inner sleeve, and the central axis of the outer sleeveand the inner sleeve are coincided mutually. The gear frame is fixed on the inner wall of the inner sleeve and the gear frame is paralleled to the central axis. The gear is coordinated with the gear frame. The lift and thrust motor is connected with the gear through the connecting shaft. The lift and thrust motor can drive the inner sleeve to take alternating motion in the outer sleeve. The end cap is connected with the rear part of the inner sleeve for the reinforcement. The twist motor is connected with the front end of the inner sleeve, a holding device is arranged on the motor axis, and the silver needle is connected with the rotating axis of the motor. A locating groove which is paralleled to the central axis is chiseled on the inner wall of the inner sleeve and the locating groove is used for preventing the rotation of the inner sleeve, and the locating groove is coordinated with the locating hole on the outer sleeve, the pin and the inner sleeve groove. The invention has the advantages that the structure is simple, the application is convenient, the commanding is easy, and the invention can be utilized in the field of the clinical acupuncture and the teaching and research.

Disclosed is a safety wheel hub with a hidden wheel groove, mainly comprising a movable slide ring lock and an adjustment device matching with same. In a locking state, the movable ring lock can cover the hidden wheel groove, a pressure-loss tire will not be drawn into or break away from the wheel groove when blowing out, and forms a rubber pad using the thickness thereof, thereby endowing a wheel with normal functions of transmitting traction force, braking force, steering force, etc. to the ground, and guaranteeing that a vehicle with a tire that blows out will not be out of control. In an unlocking state, the hidden wheel groove is exposed. The wheel hub structure is the same as that of the traditional design, thereby not affecting the normal disassembling and assembling of the tire.

A hydraulic chain or belt tensioner (10) includes a ratchet-pawl interface on the piston skirt (11) that can be reset to a locked position by rotating the piston (11) and compressing it until locked. The tensioner preferably includes at least one flat (30) on the piston (11). The flat (30) prevents the piston (11) from rotating axially and locks the piston into place. The locked position is especially useful for shipping the tensioner (10).

The invention relates to an adjustable looped steel plate with a tightened entrainment. The steel plate comprises an upper steel plate, a loop and an entrainment type tightening mechanism, wherein theentrainment type tightening mechanism is arranged on the upper steel plate, two ends of the loop are respectively connected with the entrainment type tightening mechanism after passing through the upper steel plate, and the loop adjusts the working length through the entrainment type tightening mechanism. The invention has the advantages that: An upper steel plate is arrange above that bone to berestored, An entrainment-type tighten mechanism is arranged on that side of the upper steel plate away from the bone to be restore, and the two ends of the loop are respectively connected with the clamping mechanism after passing through the bone to be restored and the upper steel plate, then the length of the loop in the bone to be restored is adjusted by the clamping tightening mechanism, As that length increase, the clamping force of the bone to be restore can be reduced at this time, and when the length decreases, the clamping force of the bone to be restore can be increased at this time,so as to facilitate finding a suitable force for restoring the bone to be restored and shortening the restoration time.