Planet roller screw with involute threaded tooth profile
A technology of planetary rollers and involutes, applied in the direction of belts/chains/gears, mechanical equipment, transmissions, etc., can solve problems such as load-carrying capacity decline, achieve the effect of improving stability and avoiding instability
Pending Publication Date: 2020-07-28
中国船舶重工集团公司第七0四研究所
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Problems solved by technology
[0006] In order to reduce the problem that the thread engages on the edge and causes the load capacity to drop during the engagement process
Method used
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Embodiment Construction
[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] Such as Figure 4 to Figure 7 As shown, the present invention provides a planetary roller screw with an involute thread profile, including a screw 1, a nut 3, and a roller 4, and the screw 1 and the nut 3 are connected through the transmission of the roller 4, and Between the roller 4 and the lead screw 1 and the nut 3 is a drive screw connection. At least one of the transmission thread profiles of the lead screw 1, the nut 3, and the roller 4 is an involute profile, and the rest are linear profiles.
[0025] Such as Figure 4 As shown, the tooth profile of the transmission thread, the thread normal (axial) tooth profile is composed of two symmetrically distributed involutes J, and the angle formed by the tangent line of the two involutes J at the pitch diameter of the thread is the thread tooth Form angle α. The radius of curvature at any po...
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The invention relates to a planet roller screw with an involute threaded tooth profile. The planet roller screw comprises a lead screw, a nut and a pin roller. The lead screw and the nut are in pin roller transmission connection, and the pin roller is in transmission threaded connection to the lead screw and the nut. At least one of transmission threaded tooth profiles of the lead screw, the nut and the pin roller is the involute threaded tooth profile, and the rest is linear tooth profiles. The threaded axial tooth profile of the transmission threaded tooth profile is composed of two symmetrically distributed involutes, and an included angle formed by tangent lines at pitch diameters of threads of the two involutes is a tooth form angle alpha of a thread. By combining parameters of the involutes with thread parameters needed to design, the involute threaded tooth profile applied to the planet roller screw is established. The planet roller screw obtained by the invention is superior toan existing arc-shaped tooth profile engaging mode in engaging characteristic, so that problems of unstable engagement, lowering of carrying ability caused by change of engaging points and the like can be avoided effectively, and therefore, the carrying stability of the planet roller screw is improved greatly.
Description
technical field [0001] The invention relates to a planetary roller screw, in particular to a planetary screw transmission mechanism which converts rotary motion into linear motion, which can drive the planetary roller screw with heavy load and high speed. Background technique [0002] Compared with the ball screw, the roller screw has the characteristics of stronger load capacity, faster speed, higher precision, longer life and low maintenance cost, so it has become a precision mechanical equipment such as aviation machinery, CNC machine tools, precision instruments and meters. One of the most critical basic components in the industry, and has been widely used. [0003] Such as figure 1 As shown, in addition to the lead screw 1, the nut 3, and the roller 4, the planetary roller screw also includes parts such as the inner ring gear 2, the planet carrier 5, and the retaining ring 6. According to the relative movement form between the roller and the nut and the screw during t...
Claims
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IPC IPC(8): F16H25/22
CPCF16H25/2252
Inventor 黄鸿坤黄强强童小川袁航王天一
Owner 中国船舶重工集团公司第七0四研究所