Dimension measurement device for assembly with shaft of stepless transmission

Abstract

The invention provides a dimension measurement device for assembly with shaft of stepless transmission. The state of load bearing by the assembly with shaft is assumed, dimension of two parts spaced from each other along the axis direction is measured. The dimension measurement device is positioned between two bearings spaced from each other along the axis direction of the assembly with shafts. The dimension measurement device comprises a stage member having stage surface having bearing outer ring end surface for supporting the assembly body; a support having keeping surface in contact with the bearing outer ring end surface of the assembly; a gauge for limiting the dimension between the limiting stage and the support so that the keeping surface is in a predetermined reference height withrespect to the height of the stage surface. During the time that the outer ring end surface is held by the stage surface and the keeping surface, while external force is applied to the outer ring endsurface by the sole weight of the support, external force is applied to the outer ring end surface by the air cylinder, the lowering amount of the self-reference height of the keeping surface is measured by the digital gauge and the controller, and the dimension between parts is measured when external force is applied to the outer ring end surface from two directions.

Description

technical field [0001] The present invention relates to a continuously variable transmission that transmits an input from a driving pulley to an output from a driven pulley at a continuously variable ratio via an endless power transmission member wound between the driving pulley and a driven pulley. A pulley shaft assembly, and relates to a device capable of measuring dimensions under a state in which the pulley shaft assembly is assumed to be loaded. Background technique [0002] As a dimension measuring device for parts constituting a continuously variable transmission, for example, there is a dimension that measures the thickness of a predetermined portion (groove) located on the belt by clamping the belt between the front ends of two pin-shaped contacts. Measuring device (for example, refer to Patent Document 1). [0003] Patent Document 1: (Japanese) Japanese Patent Application No. 2002-62129 [0004] However, in actual use, a large load is applied to the inside of th...

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Problems solved by technology

[0004] However, in actual use, a large load is applied to the inside of the continuously variable transmission

Therefore, if the load on the part in actual use is considered, it is ideal to assume such a load and change the measurement conditions of the part in various ways. However, existing measuring devices cannot assume such a load and can only measure Normal state with no load applied

In addition, in the conventional device, the measurement is performed using a pin-shaped contact, so it cannot be measured as a whole part, but can only be estimated as an average of local measured values.

[0005] In addition, since the input of the pulley shaft on the driving side is large, it is desirable to consider the load applied in the axial direction regardless of the direction of rotation. The above-mentioned device has problems such as increasing the lateral width and causing the device to be larger, so it is not suitable for measuring the axis of the shaft.

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