Transmission device of precise displacement actuator

A transmission device and precision displacement technology, which is applied to transmission devices, transmission parts, belts/chains/gears, etc., can solve the problems of easy wear of threaded transmission pairs, excessive clearance of axial backlash, and difficult grinding of internal threads, etc. problems, achieve the effect of reducing precision machining requirements, eliminating axial clearance, and satisfying driving and positioning accuracy

Inactive Publication Date: 2011-06-15
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the internal and external threads generally need to be ground by a grinding machine, but the internal thread with a small inner diameter is difficult to grind, and the thread transmission pair is easy to wear during use, often because the axial backlash is out of tolerance, it cannot be repaired, and the thread needs to be replaced Transmission pair

Method used

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  • Transmission device of precise displacement actuator
  • Transmission device of precise displacement actuator
  • Transmission device of precise displacement actuator

Examples

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Embodiment 1

[0018] refer to figure 2 , a precision displacement actuator transmission, consisting of a rotating nut and a screw 3 transmission pair, the rotating nut adopts a double-nut structure, one of which is a main body nut 9, and the other is an anti-backlash nut 12; the anti-backlash nut 12 is provided with The internal and external threads have different pitches. The anti-backlash nut 12 is embedded in the front end of the main body nut 9, and is connected to the screw rod 3 through the internal thread, and is connected to the main body nut 9 through the external thread. Such as image 3 and Figure 4 As shown, the flange at the end of the anti-backlash nut is provided with a fixed ring 10, and the inner circle of the fixed ring 10 and the outer circle of the anti-backlash nut 12 are provided with 13 toothed grooves, and the anti-backlash nut 12 passes through the fixed ring. 10 is fixed on the body nut 9 by screws 11.

[0019] The main body nut 9 is supported in the support h...

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Abstract

The invention relates to a transmission device of a precise displacement actuator. The transmission device is characterized in that a transmission pair consists of a swivel nut and a screw; the swivel nut is supported in a supporting shell through a bearing piece; the bearing piece comprises a bearing inner clamping ring nut, a bearing outer retainer ring and two rolling bearings, wherein the tworolling bearings are respectively arranged at both sides of the bearing outer retainer ring; one of rolling bearing inner rings forms axial limit through a circular bead positioned on the swivel nut;and the bearing inner clamping ring nut is connected with the swivel nut through internal threads and acts on the other rolling bearing inner ring along a reverse axial direction to form the axial limit.

Description

technical field [0001] The invention relates to a transmission device of a precision displacement actuator, which belongs to a thread transmission pair. Its outstanding feature is that it can eliminate the axial backlash gap of the thread transmission pair, and has the advantages of easy processing and production, low manufacturing cost and long service life, especially Suitable for precision electromechanical systems requiring precision displacement actuation and positioning. Background technique [0002] Ordinary screw transmission pair such as figure 1 Shown, nut 1, screw rod 2. Due to the sliding friction of the thread transmission pair, wear will occur during use, and the wear will accumulate to a certain extent, and the axial backlash will be out of tolerance, that is, it needs to be replaced. Traditional displacement actuators mostly use threaded transmission pair as the output mechanism of the last section, which is the advantage of self-locking and large output l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/20F16H57/12
Inventor 周国华杨德华李国平
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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