Planetary pin roller lead screw with annular grain lead screw matched with threaded shaft sleeve
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A planetary roller, threaded bushing technology, used in belts/chains/gears, mechanical equipment, transmissions, etc., can solve the problems of increased friction and impact, uneven operation, vibration and noise, etc., to achieve smooth operation, The effect of high transmission position accuracy and low vibration
Pending Publication Date: 2019-04-23
SU CHUNGUANG
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However, the reset ring will cause increased friction and sh
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[0039] The first embodiment
[0040] Such as Figure 1 to Figure 4 As shown, the present invention provides a planetary roller screw, which includes a screw rod 1, a shaft sleeve 2, and a roller 3.
[0041] The screw rod 1 is cylindrical as a whole, and the outer circumference of the screw rod 1 is provided with a plurality of first grooves 11 extending along the circumferential direction C. For example, the number of the first grooves 11 is greater than or equal to two. The plurality of first grooves 11 are arranged parallel to each other. The first groove 11 is formed in a closed ring shape, and the cross section of the first groove 11 along a plane perpendicular to the extending direction of the first groove 11 may be, for example, a triangle. The plane where the first groove 11 is located may be perpendicular to the axial direction A of the screw rod 1.
[0042] The shaft sleeve 2 may be cylindrical as a whole, the shaft sleeve 2 is sleeved on the screw rod 1, and the axis of ...
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[0051] Second embodiment
[0052] The overall structure of the planetary roller screw according to the second embodiment of the present invention is the same as the planetary roller screw of the first embodiment. In this embodiment, components that are the same as or similar to those in the first embodiment are given the same reference numerals, and detailed descriptions of these components are omitted.
[0053] Such as Figure 5 to Figure 7 As shown, the present invention provides a planetary roller screw, which includes a screw rod 1, a shaft sleeve 2, and a roller 3.
[0054] The screw rod 1 is cylindrical as a whole, and a plurality of first grooves 11 extending along the circumferential direction C are provided on the outer periphery of the screw rod 1. The first groove 11 is formed in a closed ring shape. A plurality of first grooves 11 are arranged parallel to each other, and any two adjacent first grooves 11 may have the same distance.
[0055] The shaft sleeve 2 may be cyl...
Example
[0060] The third embodiment
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Abstract
The invention provides a planetary pin roller lead screw with an annular grain lead screw matched with a threaded shaft sleeve. The planetary pin roller lead screw comprises a lead screw, a shaft sleeve and a plurality of pin rollers, wherein a first groove extending along the circumferential direction is formed in the periphery of the lead screw and the first groove which is formed annularly is closed in the circumferential direction of the lead screw; the shaft sleeve is arranged on the lead screw in a sleeving manner, a plurality of second grooves extending along the spiral line direction are formed in the inner surface of the shaft sleeve, and the first groove and the second grooves are intersected; and a plurality of protruding teeth are arranged on the periphery of the pin roller, each protruding tooth which is formed annularly is closed in the circumferential direction of the pin roller, and the protruding teeth are embedded into the intersected positions of the first groove andthe second grooves. According to the planetary pin roller lead screw with the annular grain lead screw matched with the threaded shaft sleeve, in a working process of the planetary pin roller lead screw, the protruding teeth move in the annularly closed first groove, so that the pin roller is fixed relative to the axial position of the lead screw, and the planetary pin roller lead screw not onlycan be great in bearing force and high in transmission position precision, but also can be small in vibration and noise and is smooth to operate.
Description
technical field [0001] The invention belongs to the technical field of mechanical transmission, and in particular relates to a planetary roller screw with an annular screw rod and a threaded bushing. Background technique [0002] The planetary roller screw is a new type of transmission that converts rotary motion into linear motion. The planetary roller screw has higher impact resistance than the traditional ball screw, the static load of the planetary roller screw is about 3 times that of the traditional ball screw, and the life is about 15 times that of the traditional ball screw. And the planetary roller screw can have higher rotation speed and rotation acceleration, so it is widely used in the fields of precision instruments, weapons and equipment, industrial robots and aerospace. [0003] An existing standard planetary roller screw consists of a screw, bushing and rollers. The outer peripheral surface of the screw rod is provided with an external thread, the inner per...
Claims
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Application Information
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