A needle screw
A lead screw and needle roller technology, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problems of poor monitoring accuracy of lead screw movement, poor bearing capacity of ball screw, etc., to achieve convenient replacement, improve Radial bearing capacity, the effect of increasing the contact area
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[0027] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.
[0028] like figure 1 and figure 2 As shown, the present invention is a needle screw, which mainly includes a screw 2 and a sliding sleeve 1 sleeved on the screw 2;
[0029] Wherein the sliding sleeve 1 includes a sliding hole for passing through the lead screw 2, and two sets of stroke roller mechanisms and two sets of supporting roller mechanisms are arranged in the sliding sleeve 1;
[0030] Wherein the support roller mechanism includes a number of rotating grooves 3 arranged in an array along the inner wall of the sliding hole. The array radian of the rotating grooves 3 is greater than or equal to 180°. A needle roller A4 is arranged in the rotating groo...
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