Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Rotary-linear movement change mechanism and actuator

A technology of linear motion and transmission components, which is applied in the direction of mechanical equipment, transmission devices, gear transmission devices, etc., can solve the problems of reduced durability, large size, and increased movement volume, and achieve the effect of improving durability

Inactive Publication Date: 2011-04-06
YAMATAKE HONEYWELL CO LTD
View PDF4 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned conventional planetary differential screw type rotary-linear motion conversion mechanism, the stroke of the control shaft is ensured by the amount of movement of the sun shaft, so if the maximum stroke of the control shaft is long, the overall length of the sun shaft will also become longer. Since the amount of movement increases, there is a problem that it becomes larger in the direction of movement
In addition, in the case of accelerating the linear motion of the sun shaft, it is possible to cope with it by increasing the rotation speed of the nut. However, if the rotation speed is increased too much, the screw parts of the nut, the planetary shaft, and the sun shaft are worn away, and cracks are likely to occur. Issues that cause reduced durability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotary-linear movement change mechanism and actuator
  • Rotary-linear movement change mechanism and actuator
  • Rotary-linear movement change mechanism and actuator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

[0028] exist Figure 1 to Figure 5 Among them, this embodiment represents an actuator suitable for controlling the opening and closing of a valve. The actuator 1 includes a rotation-linear motion conversion mechanism 3 housed in a housing 2 .

[0029] The housing 2 is composed of a cylindrical housing main body 2A and a cover 2B, and the rear end side opening of the cover 2B is integrally formed with the front end side opening of the housing main body 2A by screwing the external thread 6a and the internal thread 6b. combined.

[0030] The rotation-linear motion conversion mechanism 3 includes: a motor 4 housed in the housing main body 2A, a planetary gear mechanism 5 driven by the motor 4, a transmission member 7 housed in the cover 2B, a first screw rod 8, a main shaft 9, a second Screw rod 32 and sleeve 33 etc.

[0031] The motor 4 is accommodated in the ca...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a rotary-linear movement change mechanism and an actuator, capable of simultaneously accomplishing two contradictious technical objects of minaturization and large action amount. The rotary-linear movement change mechanism (3) comprises a planet gear mechanism (5), first, second screw shafts (8,32), a transmission unit (7), a main shaft (9) and a sleeve (33). The planet gear mechanism (5) drives a sun gear (20) by an electric machine (4) to make a planet gear (24) rotate and revolve. The first screw shaft (8) is integrated with the transmission unit (7), thus the main shaft (9) linearly moves. The second screw shaft (32) is integrated with a planet gear shaft (23). The transmission unit (7) rotates together with the revolution of the planet gear (24) and linearly moves along the second screw shaft (32). A cover (2B) makes the sleeve not rotate and freely integrated with the transmission unit (7) to perform the linear movement.

Description

technical field [0001] The present invention relates to a rotation-linear motion conversion mechanism that converts rotation into linear motion, and an actuator using the rotation-linear motion conversion mechanism. Background technique [0002] Generally, a thread is used as a general rotary-linear motion conversion mechanism for converting rotary motion into linear motion (linear motion). For example, there is a configuration in which a planetary gear mechanism is combined with a thread as a reduction gear mechanism disclosed in Patent Document 1. The planetary gear mechanism has a drive shaft (input shaft), a driven shaft (output shaft), a fixed shaft, and a common basic shaft. ), a planetary gear, and a planetary carrier (output shaft) that transmits torque through the orbital motion of the planetary gear and rotates. [0003] The planetary differential screw type rotary-linear motion conversion mechanism disclosed in the above-mentioned Patent Document 1 incorporates a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16H37/02F16H25/20F16H1/28
CPCF16H25/12F16H2025/2087
Inventor 关根浩一
Owner YAMATAKE HONEYWELL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com