Toroidal continuously variable transmission

A continuously variable transmission, ring-type technology, applied in friction transmissions, elements with teeth, belts/chains/gears, etc., can solve the problems of difficulty in ensuring, difficult to achieve cost reduction and sufficient reliability assurance, etc. To achieve the effect of improving durability

Inactive Publication Date: 2012-10-31
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, in the case of the former structure, it is difficult to secure the strength and rigidity enough to support the force 2Ft to support and fix the anchor piece on the support beam portion, and it is difficult to achieve cost reduction and sufficient reliability.

Method used

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  • Toroidal continuously variable transmission
  • Toroidal continuously variable transmission
  • Toroidal continuously variable transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0115] [The first example of the first embodiment]

[0116] figure 1 The first example of the first embodiment of the present invention is shown. In addition, this example is characterized in that it is provided on the inner surface of the support beam portion 9b constituting the trunnion 7b ( figure 1 The shape of the cylindrical convex surface 22a in the upper side). The structure and function of the other parts are the same as those of the second example of the conventional structure, so the same symbols are assigned to the same parts, and repeated illustrations and descriptions are omitted or simplified. The following description will focus on the characteristic parts of this example.

[0117] In the case of this example, the cylindrical convex surface 22a is not a simple cylindrical convex surface, and the entire cylindrical convex surface 22a is implemented in a figure 1 Crowning as exaggeratedly shown in . Specifically, the entire generatrix shape of the cylindri...

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PUM

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Abstract

The objective of the present invention is to implement a structure for a toroidal continuously variable transmission with which the manufacturing of the parts, the management of parts, and the assembly work are easy, and the cost can easily be reduced, and the gear change operation can be stabilized. This toroidal continuously variable transmission is equipped with: a retention hole (28) having a circular cross section and formed on one portion of each outer ring (16f); a columnar anchor pin (26), a portion of which protrudes from the inner surface of a concave part (23e) of the outer ring (16f) when inserted into and secured in the retention hole (28) with an interference fit; and an anchor groove (27) that is formed in a cylindrical convex surface (22e) of the support beam part (9f) of each trunnion (7f), and is formed in the circumferential direction of this cylindrical convex surface (22e). A portion of the anchor pin (26) engages the anchor groove (27), and at this engagement part the torque applied to a power roller (6a) in conjunction with the rotation of input-side and output-side disks (2, 5) can be supported.

Description

technical field [0001] The present invention relates to a semi-toroidal toroidal continuously variable transmission used as an automatic transmission. Background technique [0002] A half-toroidal toroidal continuously variable transmission has been used as, for example, a speed change device for an automobile, and the structure is described in Japanese Patent Application Laid-Open No. 2003-214516, Japanese Patent Laid-Open No. 2007-315595, Japanese Patent Laid-Open No. 2008 -25821, JP-A-2008-275088, etc. In addition, the structure of combining the ring-type continuously variable transmission and the planetary gear mechanism to widen the adjustment width of the transmission ratio is also described in Japanese Patent Application Laid-Open No. 2004-169719, Japanese Patent Laid-Open No. 2009-30749, Japanese Patent Laid-Open No. 2006 -283800 bulletin etc., are well known. Figure 28 and Figure 29 A first example of a conventional toroidal continuously variable transmission is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H15/38
CPCF16H15/38F16H63/065
Inventor 野地祥子井上智博西井大树山口智巳丰田俊郎岸田宽孝
Owner NSK LTD
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