Roller screw rod device
A roller screw and screw technology, which is applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problems of difficulty in processing square long holes, affecting the smoothness of roller circulation and rolling, and being inconvenient to manufacture. The effect of improving the smoothness of roller reflow and being easy to process, manufacture and assemble
Inactive Publication Date: 2007-07-04
HIWIN TECH
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Problems solved by technology
However, the roller is a cylindrical structure with a square flow passage section, so it is quite difficult to process a square long hole in the nut
Therefore, the means to solve the problem of the return elbow in the ball screw obviously cannot be directly applied to the roller screw to solve the problem
[0010] To sum up, the design of using the return elbow for the roller return circulation is not only inconvenient to manufacture, but also affects the smoothness of the roller circulation, so it is necessary to improve it
Method used
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[0046] Please refer to FIG. 2-FIG. 4, which are the first embodiment selected by the present invention. The roller screw device of this embodiment is mainly composed of a screw 5 , a nut 6 and a plurality of rollers 7 , and the plurality of rollers 7 in this embodiment are arranged in a cross arrangement.
[0047] The outer edge of the screw 5 is concavely provided with a spiral groove 51 with a V-shaped cross section, and the nut 6 cooperates with the screw 5 so that the screw 5 can pass through it, and the nut 6 The inner edge faces the helical groove 51 of the screw rod 5 and is provided with a helical groove 61 with a V-shaped cross section. The nut 6 is provided with a return passage 8 to connect the two ends of the helical groove 61 to form a The runners are connected end to end, and a plurality of rollers 7 are arranged in the runners, so that the plurality of rollers 7 can endlessly circulate and roll in the nut 6 as the transmission medium between the screw 5 and the ...
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The invention relates to a roller screw device. It makes the reflux pathway be designed into the combination of a line segment and two reflux segments and the needed turn angle in rolling path of roller in cycle be designed in two reflux parts to form two reflux segment dispersedly. The reflux part is formed together by injection or cast and the straight segment is formed by the groove machined on the screw cap directly, and cover board covering on it. By setting the cover board two reflux parts can be fixed so that the machining and assembling of whole reflux pathway is easy. In addition, the straight segment of reflux pathway is set in the screw cap and two reflux segments is connected with two ends of the straight segment and two ends of helical groove so that the pathway with connecting the beginning and the end. By it the path of reflux pathway shortens and the section shape of reflux pathway is ensured so as to improve the regurgitant smooth degree of roller.
Description
technical field [0001] The invention relates to a roller screw device, in particular to a roller screw device which can improve smoothness of return flow and is easy to manufacture and assemble. Background technique [0002] Press, the structure of the ball screw is mainly to set spiral grooves on the screw and nut that are compatible with each other, and to set a large number of balls in the spiral groove of the nut, and to set a return path in the nut so that most of the balls can The endless circulation flow in the nut, and the ball can be used as the transmission medium between the screw and the nut, so that the ball screw can achieve low frictional resistance and high precision positioning in operation. [0003] It should be known that the ball and the spiral groove are in the form of point contact. According to the Hertz contact theorem, the ball and the spiral groove are in point contact, and the contact area is small, so the external force it can withstand is relativ...
Claims
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Inventor 潘弘崧
Owner HIWIN TECH