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Toroidal type stepless speed change device

A continuously variable transmission, ring-type technology, applied in the direction of transmission, friction transmission, belt/chain/gear, etc., can solve the problems of reduced transmission efficiency, inability to use as it is, increased vibration, etc., and achieve the effect of ensuring durability

Inactive Publication Date: 2009-02-11
NSK LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above Figure 5 to Figure 8 In the case of the structure in which the first and second trunnions 30, 31 are freely displaceable and supported on both ends of the first and second swing frames 21, 22 as shown, it is not the same as in the above-mentioned patent. Each trunnion is supported by a support plate as in the structure described in Document 2
In addition, in the aforementioned Figures 5 to Figure 8 In the case of the structure shown, the space for installing the above-mentioned mating member is limited, and the structure described in the above-mentioned Patent Document 2 cannot be adopted as it is.
[0016] In addition, when the torque passing through the toroidal continuously variable transmission fluctuates suddenly as described above, there is a possibility that a jump occurs in which the speed ratio does not converge to a predetermined value due to overshooting.
Such jumping not only reduces the transmission efficiency and increases the vibration, but also reduces the drivability (driving stability), etc., which is not preferable.

Method used

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  • Toroidal type stepless speed change device
  • Toroidal type stepless speed change device
  • Toroidal type stepless speed change device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Figure 1~ image 3 This shows Example 1 of the present invention corresponding to claims 1 to 4. In addition, the present invention is characterized by preventing the (first and second) power rollers 4 (7) supported on the (first and second) trunnions 30 (31) from being excessively tilted to ensure these (first and second) power rollers 4 (7). , Second) Durability of power roller 4 (7) and (first and second) input side and output side discs 2, 5, 3, 6 (refer to Fig. 5). The structure and function of the other parts are the same as those shown in Figure 5~ Figure 8 The conventional structure shown is the same, so repeated illustrations and descriptions are omitted or simplified. image 3 The structure and function of the parts shown are explained. In addition, the following description will omit "first" and "second" of the first and second components that have different cavities.

[0121] Via the support shaft 34 (refer to Figure 5~ Figure 8 ) Each swing frame 21 (22) supp...

Embodiment 2

[0133] Figure 4 This shows Embodiment 2 of the present invention corresponding to claims 1 to 3, and 5. In the case of the second embodiment, the side surfaces of the convex portions 66, 66 provided on the stop member 73 and the concave portions 67, 67 provided on the end plate 48 constituting the swing frame 21 (refer to FIG. 1) Elastic members 77 and 77 are provided between the inner surfaces of the trunnion 30 to constitute a resistance mechanism that acts as a resistance to the swing of the trunnion 30 (refer to FIG. 1). That is, by sandwiching the elastic members 77, 77, such as a compression coil spring, between the side surfaces of the convex portions 66, 66 facing each other and the inner surfaces of the concave portions 67, 67, the convex portions 66, 66 The side surfaces of 66 and the inner surfaces of the recesses 67 and 67 impart forces in directions away from each other. Such force is applied to each of the trunnions via the stopper member 73 provided with the conve...

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PUM

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Abstract

To prevent a power roller from being excessively inclined. Stop members fixed to opposite ends of trunnions are provided with convex sections. Further, the inner surfaces of end plates constituting a swing frame are provided with concave sections at positions opposed to the convex sections. The convex sections are inserted in the concave sections in such a manner as to allow the trunnions to displace in the direction of swing. Further, the lateral surfaces of the convex sections abut against the inner surfaces of the concave sections on the basis of the swing of the trunnions, thereby preventing the trunnions from swinging more than a predetermined degree.

Description

Technical field [0001] The toroidal continuously variable transmission according to the present invention is used, for example, as a transmission unit constituting an automatic transmission for a vehicle (automobile). Background technique [0002] As a transmission for automobiles, toroidal continuously variable transmissions have been studied, and some of them have been implemented. As for passenger cars, conventionally known, for example, Patent Document 1 is assembled with a large-scale and generates large torque. The structure of the engine is suitable as a transmission unit of an automatic transmission for a four-wheel drive vehicle. Figure 5~ Figure 8 It shows a toroidal continuously variable transmission for a four-wheel drive vehicle with a large displacement described in Patent Document 1. The toroidal continuously variable transmission 1 is provided with three first power rollers 4, 4 between the first input side disc 2 and the first output side disc 3, respectively, o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H15/38
CPCF16H15/38
Inventor 西井大树
Owner NSK LTD