Small-tooth-difference sliding-tooth steel ball transmission mechanism

A transmission mechanism with less tooth difference technology, which is applied to transmission devices, friction transmission devices, transmission device parts, etc., can solve the problems of strong error sensitivity between internal gears and external gears, increased friction and wear, and strong error sensitivity. Achieve the effects of reducing error sensitivity, increasing contact deformation, and increasing the number of meshing teeth

Inactive Publication Date: 2015-12-23
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of small tooth difference transmission is: because of the small tooth difference, the intermeshing internal gear and external gear are highly sensitive to errors, and various interferences are easily generated, and the design and calculation of gear geometric parameters are very complicated.
The problem of this kind of movable tooth transmission mechanism is: when the radial groove of the movable tooth disc and the processing accuracy of the movable tooth do not meet the requirements, the friction and wear will be aggravated, the operation will not be smooth, and the transmission accuracy, efficiency and life will be reduced.
Among them, the selection of the variation coefficient is extremely critical, but the correct selection of the variation coefficient not only needs to avoid strict interference conditions, but also needs to consider many uncontrollable process factors such as tool parameters and wear or not. The selection and optimization of the variation coefficient are extremely important. In addition, the tooth modification technology of involute internal meshing gears with few tooth differences is not mature, and it is still a scientific problem to be solved urgently in the industry, which greatly hinders the development of involute internal meshing small tooth difference transmission
[0008] As far as cycloidal pinwheel transmission is concerned, the technical problem is that the ideal cycloidal gear is basically impossible to process, and the error sensitivity is extremely strong. In order to compensate for processing and assembly errors and achieve good lubrication conditions, etc., cycloidal gears usually require tooth profile Modification, but in order to ensure a reasonable number of multi-teeth meshing teeth, improve the stress on the tooth surface, ensure good transmission accuracy and lubrication conditions, the modification method and amount of cycloidal gears must be extremely appropriate.
However, there are still different opinions on the modification technology of cycloidal gears in the industry, and the specific modification technology is not yet mature, which also greatly restricts the development of cycloidal pinwheel transmission.

Method used

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  • Small-tooth-difference sliding-tooth steel ball transmission mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, this embodiment includes a pin wheel and a movable tooth gear eccentrically mounted on the pin wheel. The pin wheel has a pin tooth housing 1, and the inner circumference of the pin tooth housing 1 is provided with a pin groove along the axial direction, and the pin tooth groove is equipped with There are needle teeth 2, and the movable tooth gear has a movable tooth frame 4, and the outer circumference of the movable tooth frame 4 is provided with an axial groove along the axial direction, and a steel ball 3 is housed in the axial groove, and the needle tooth 2 and the steel ball 3 are in rolling engagement.

[0029] Such as figure 2 As shown, in order to limit the pin teeth 2 and the steel ball 3 from slipping out of the axial groove, retaining rings 5 ​​are installed on the two sides where the pin teeth 2 and the steel ball 3 mesh.

[0030] In the axial grooves of the movable rack, one or more steel...

Embodiment 2

[0033] Such as Figure 5 and Figure 6 As shown, the difference from Embodiment 1 is that the pin teeth 2 are conical pins, and the diameters of more than two steel balls in the axial grooves are different.

[0034] The internal gear of the present invention is not only a pin wheel, but also an internal gear with a specific tooth profile, such as a hypocycloid, a hypocycloid plus a segmented arc, a sine or cosine curve, or other curves that can achieve continuous and correct meshing.

[0035] The present invention can be widely used in various compound planetary transmissions. Usually, the power is input by a single crank or multiple cranks through the rotating arm bearing, and the rotating arm bearing drives the movable tooth gear, and the movable tooth gear meshes with the internal gear, and the power is supplied by the internal gear or Specialized W agency output. The W mechanism can be a multi-crank type, pin type, cross slider type, zero tooth difference type, floating ...

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Abstract

The invention discloses a small-tooth-difference sliding-tooth steel ball transmission mechanism in order to achieve the purposes which people long for all the time so as to lower the requirement for machining precision of sliding-tooth gears, reduce error sensitivity between an inner gear and an outer gear of a small-tooth-difference transmission mechanism and extend the interference conditions. The small-tooth-difference sliding-tooth steel ball transmission mechanism comprises an inner gear and a sliding-tooth gear eccentrically installed in the inner gear; the sliding-tooth gear is provided with a sliding-tooth frame; axial grooves are formed in the external circumference of the sliding-tooth frame in the axial direction; steel balls are installed in the axial grooves; inner teeth of the inner gear are engaged with the steel balls in a rolling mode. The small-tooth-difference sliding-tooth steel ball transmission mechanism has the advantages that the sliding-tooth frame does not need to be shaped or only needs to be shaped simply, and is easy to machine; the face contact and line contact modes between teeth in an existing small-tooth-difference transmission mechanism are changed into the point contact mode, contact deformation generated when the gears are engaged is increased, the number of engaged teeth is increased, error sensitivity of the engaged teeth is reduced, precision transmission can be achieved, or the small-tooth-difference sliding-tooth steel ball transmission mechanism has high torsional rigidity, high bearing capacity and good comprehensive performance.

Description

technical field [0001] The invention belongs to a transmission mechanism, in particular to a steel ball transmission mechanism with few teeth and difference movable teeth. Background technique [0002] The small-tooth-difference transmission is a transmission mechanism composed of a pair of internal meshing gear pairs with a small difference in the number of teeth (usually 1 to 2 teeth), an eccentric element, and an output mechanism. It has the advantages of small size, light weight, large transmission ratio and transmission ratio range, high efficiency, strong carrying capacity, etc., and has been widely used in aerospace, shipbuilding, instrumentation and other industries. The problem of small tooth difference transmission is: because of the small number of teeth difference, the error sensitivity of the intermeshing internal gear and external gear is extremely strong, and various interferences are easily generated, and the design and calculation of the geometric parameters...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F16H13/08F16H57/08
CPCF16H13/08F16H57/08
Inventor朱才朝郭沛霖
OwnerCHONGQING UNIV