Coaxial linear motion and rotary motion converter

A technology of linear motion and rotary motion, applied in the field of transmission, can solve the problems of loose structure, misalignment of two transmission end axes, large volume, etc., and achieve the effect of compact structure, small volume and wide application range

Inactive Publication Date: 2018-10-26
QINGDAO UNIV OF SCI & TECH
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AI-Extracted Technical Summary

Problems solved by technology

These conversion devices have problems such as misalignment of axe...
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Method used

The end cap 6 is arranged on the open end of the housing 1, the outer periphery of the end cap 1 is provided with an external thread 61 cooperating with the internal thread 12, and the inner e...
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Abstract

The invention discloses a coaxial linear motion and rotary motion converter. The coaxial linear motion and rotary motion converter comprises a housing, a rotary nut, a linear guide rod, a first bearing, a second bearing and an end cover, wherein the housing is of a hollow cylindrical structure; one end of the housing is provided with an opening, and is equipped with a first bearing flange; the other end of the housing is open, and is equipped with inner threads; the end cover is arranged at the open end of the housing; outer threads which are matched with the inner threads are arranged at theperiphery of the end cover; the inner side end of the end cover is equipped with a second bearing flange; the rotary nut is arranged in the housing, and one end of the nut extends out of the housing;a ring-shaped bump is arranged at the periphery of the rotary nut; the first bearing and the second bearing sleeve the rotary nut, and are separately positioned at the two sides of the ring-shaped bump; one end of the linear guide rod is connected with a linear moving end; the other end of the linear guide rod is equipped with threads; and the linear guide rod is connected with the rotary nut through threads. The coaxial linear motion and rotary motion converter can realize mutual conversion between linear motion and rotary motion which are coaxial, and has the characteristics of being compactin structure, small in size and wide in range of application.

Application Domain

Gearing

Technology Topic

EngineeringLinear motion +3

Image

  • Coaxial linear motion and rotary motion converter
  • Coaxial linear motion and rotary motion converter
  • Coaxial linear motion and rotary motion converter

Examples

  • Experimental program(1)

Example Embodiment

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0025] Reference Figure 1-6 , A coaxial linear motion and rotary motion converter, comprising a housing 1, a rotating nut 2, a linear guide rod 3, a first bearing 4, a second bearing 5 and an end cover 6, wherein the housing 1 It is arranged in a hollow cylindrical structure, one end of which is open with a first bearing rib 11, and the other end is open and provided with an internal thread 12.
[0026] The rotating nut 2 is arranged in the housing 1 and one end thereof extends out of the housing 1, the extended rotating thread 2 is connected to the rotating movement end, the outer circumference of the rotating nut 2 is provided with an annular protrusion 21, the first bearing 4 And the second bearing 5 are sleeved on the rotating nut 2 and are respectively located on both sides of the annular protrusion 21, the first bearing 4 and the second bearing 5 are both set as angular contact ball bearings, the rotating nut 2 passes through two The bearing is fixed in the housing 1 and restricts the linear movement of the rotating nut 2.
[0027] The end cover 6 is provided at the open end of the housing 1, the outer circumference of the end cover 1 is provided with an external thread 61 that cooperates with the internal thread 12, and the inner end of the end cover 6 is provided with a second bearing rib 62, so The outer end of the end cover 6 is provided with a plurality of fan-shaped grooves 7 to facilitate manual tightening.
[0028] One end of the linear guide rod 3 is connected with the linear motion end, and the other end is provided with a thread. The linear guide rod 3 is connected with the rotary nut 2 through the thread. The thread of the rotary nut 2 is set as a large-pitch thread. If it is greater than the friction angle, the thread on the linear guide rod 3 is also set as a large pitch thread, and the thread lift angle is greater than the friction angle.
[0029] When the present invention works, the converter is first fixed to ensure that the axial force generated by the reciprocating linear movement of the linear guide rod 3 does not move it. The linear guide rod 3 is connected to the linear motion end, and the rotating nut 2 is connected to the rotary motion end. Connected.
[0030] When the linear motion is converted into a rotary motion, the linear motion end drives the linear guide rod 3 to move forward. The linear guide rod 3 and the rotating nut 2 contact and cooperate through the thread pair. The thread pair is set such that the thread lift angle is greater than the friction angle and cannot be self-locking. The thread pair converts the axial force into the radial force rotating around the axis, driving the rotating nut 2 to rotate, and then driving the rotating end to rotate. The axial force is transmitted to the housing 1 through the bearing and is fixed by the converter. The generated reaction force is offset, and at this time, the linear motion is converted into a coaxial rotational motion. When the linear motion end moves backward, the converter converts the linear motion into the reverse rotation motion. In this way, the reciprocating linear motion is converted into a coaxial reciprocating rotation motion.
[0031] When the rotary motion is converted into linear motion, the rotary motion end drives the rotary nut 2 to make a rotary motion. The thread pair converts the torque of the rotary nut 2 into axial thrust and transmits it to the linear guide rod 3, which drives the linear guide rod 3 to perform linear motion. The linear motion end is driven to perform linear motion. The axial reaction force generated by the thread pair is transmitted to the housing 1 through the bearing, and is offset by the reaction force generated by the converter fixing seat. At this time, the rotational motion is converted into a coaxial linear motion. When the rotary motion end rotates in the reverse direction, the converter converts the rotary motion into a linear motion in the opposite direction. In this way, the reciprocating rotation motion is converted into a coaxial reciprocating linear motion.
[0032] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Anyone familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solution of the present invention Equivalent replacements or changes to its inventive concept should all fall within the protection scope of the present invention.

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Description & Claims & Application Information

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