Load transmission mechanism unit for training machine and training machine employing same

Abstract

A load transmission mechanism unit for a training machine includes a main driving shaft portion having an end portion connected to an input portion to which a user inputs a force, and configured to rotate together with the input portion; an intermediate shaft portion configured to rotate in conjunction with the rotation of the main driving shaft portion; a first rotation transmission unit suspended between the main driving shaft portion and the intermediate shaft portion, and configured to transmit the rotations of the main driving shaft portion and the intermediate shaft portion to each other; and a second rotation transmission unit provided between the intermediate shaft portion and a crank shaft portion which is orthogonal to the intermediate shaft portion, and configured to transmit the rotation of the intermediate shaft portion and a rotation of the crank shaft portion to each other.

What is claimed is: 
     
         1 . A load transmission mechanism unit for a training machine, comprising:
 a main driving shaft portion having an end portion connected to an input portion to which a user inputs a force, and configured to rotate together with the input portion;   an intermediate shaft portion configured to rotate in conjunction with the rotation of the main driving shaft portion;   a first rotation transmission unit suspended between the main driving shaft portion and the intermediate shaft portion, and configured to transmit the rotations of the main driving shaft portion and the intermediate shaft portion to each other;   a second rotation transmission unit provided between the intermediate shaft portion and a crank shaft portion which is orthogonal to the intermediate shaft portion, and configured to transmit the rotation of the intermediate shaft portion and a rotation of the crank shaft portion to each other;   an inner housing configured to accommodate the main driving shaft portion, the intermediate shaft portion and the crank shaft portion;   an outer housing configured to accommodate the inner housing and configured such that the inner housing moves along an axial direction of the crank shaft portion in an interior of the outer housing;   a slide shaft portion disposed in the interior of the outer housing to be displaced in a direction perpendicular to the axial direction of the crank shaft portion and configured to be biased linearly by an external force; and   a connection joint portion configured such that a rotation centered on a central axis orthogonal to an axial direction of the slide shaft portion, and a rotation in a direction orthogonal to the central axis are permitted by a combination of a plurality of connection pieces, wherein one connection piece of the plurality of connection pieces is connected to the slide shaft portion,   wherein the connection joint portion is connected to the crank shaft portion such that the rotation centered on the central axis orthogonal to the axial direction of the crank shaft portion is permitted at another connection piece different from the one connection piece connected to the slide shaft portion, and is configured to convert the rotation and an axial movement of the crank shaft portion to a displacement in a vertical direction of the slide shaft portion, and   portion, the external force applied to the slide shaft portion is transmitted to the input portion via the main driving shaft portion.   
     
     
         2 . A load transmission mechanism unit for a training machine, comprising:
 a main driving shaft portion having an end portion connected to an input portion to which a user inputs a force, and configured to rotate together with the input portion;   an intermediate shaft portion configured to rotate in conjunction with the rotation of the main driving shaft portion;   a first rotation transmission unit suspended between the main driving shaft portion and the intermediate shaft portion, and configured to transmit the rotations of the main driving shaft portion and the intermediate shaft portion to each other;   a second rotation transmission unit provided between the intermediate shaft portion and a crank shaft portion which is orthogonal to the intermediate shaft portion, and configured to transmit the rotation of the intermediate shaft portion and a rotation of the crank shaft portion to each other;   a connection fixing portion configured to connect the main driving shaft portion, the intermediate shaft portion and the crank shaft portion, and configured to transmit horizontal movements of the main driving shaft portion, the intermediate shaft portion and the crank shaft portion to each other;   a slide shaft portion configured to be displaced in a direction perpendicular to the axial direction of the crank shaft portion and configured to be biased linearly by an external force; and   a connection joint portion configured such that a rotation centered on a central axis orthogonal to an axial direction of the slide shaft portion, and a rotation in a direction orthogonal to the central axis are permitted by a combination of a plurality of connection pieces, wherein one connection piece of the plurality of connection pieces is connected to the slide shaft portion,   wherein the connection joint portion is connected to the crank shaft portion such that the rotation centered on the central axis orthogonal to the axial direction of the crank shaft portion is permitted at another connection piece different from the one connection piece connected to the slide shaft portion, and is configured to convert the rotation and an axial movement of the crank shaft portion to a displacement in a vertical direction of the slide shaft portion, and   wherein, when the user horizontally moves the main driving shaft portion using the input portion, the external force applied to the slide shaft portion is transmitted to the input portion via the main driving shaft portion.   
     
     
         3 . The load transmission mechanism unit for the training machine of  claim 1 , wherein the input portion is a gripping portion the user grips or a footrest portion the user steps on. 
     
     
         4 . The load transmission mechanism unit for the training machine of  claim 1 , wherein the connection joint portion includes a plurality of universal joints, which are connected to each other, as main members. 
     
     
         5 . The load transmission mechanism unit for the training machine of  claim 1 , further comprising: a connection portion provided in the outer housing and configured to connect the load transmission mechanism unit to the training machine,
 wherein the inner housing slides in the interior of the outer housing with the horizontal movement of the main driving shaft portion.   
     
     
         6 . The load transmission mechanism unit for the training machine of  claim 2 , further comprising: a connection portion configured to connect the load transmission mechanism unit to the training machine. 
     
     
         7 . The load transmission mechanism unit for the training machine of  claim 1 , wherein the first rotation transmission unit is a transmission chain,
 wherein the main driving shaft portion includes a main-driving-shaft sprocket,   the intermediate shaft portion includes an intermediate-shaft sprocket, and   the transmission chain is suspended between the main-driving-shaft sprocket and the intermediate-shaft sprocket.   
     
     
         8 . The load transmission mechanism unit for the training machine of  claim 1 , wherein the second rotation transmission unit includes:
 an intermediate-shaft bevel gear provided in the intermediate-shaft portion; and   a crank-shaft bevel gear provided in the crank shaft portion to be engaged with the intermediate-shaft bevel gear.   
     
     
         9 . The load transmission mechanism unit for the training machine of  claim 3 , wherein the gripping portion is an annular member. 
     
     
         10 . The load transmission mechanism unit for the training machine of  claim 1 , wherein the external force is generated by a load applying unit configured to be capable of adjusting a magnitude of a load of the training machine. 
     
     
         11 . The load transmission mechanism unit for the training machine of  claim 1 , wherein a slide bearing configured to pivotably support the slide shaft portion has a bearing hole through which the slide shaft portion is obliquely inserted with respect to the axial direction of the crank shaft portion. 
     
     
         12 . The load transmission mechanism unit for the training machine of  claim 1 , wherein a slide bearing configured to pivotably support the slide shaft portion has a first bearing hole through which the slide shaft portion is orthogonally inserted with respect to the axial direction of the crank shaft portion, and a second bearing hole through which the slide shaft portion is obliquely inserted with respect to the axial direction of the crank shaft portion, the second bearing hole intersecting the first bearing hole, and
 wherein the slide shaft portion is configured to move between the first bearing hole and the second bearing hole with an axial movement of the crank shaft portion.   
     
     
         13 . The load transmission mechanism unit for the training machine of  claim 1 , wherein a slide bearing configured to pivotably support the slide shaft portion has a bearing hole formed in an inverted truncated conical shape. 
     
     
         14 . The load transmission mechanism unit for the training machine of  claim 1 , wherein a slide bearing configured to pivotably support the slide shaft portion has a narrow portion formed in an axial central portion thereof. 
     
     
         15 . A training machine comprising the load transmission mechanism unit for the training machine of  claim 1 . 
     
     
         16 . The load transmission mechanism unit for the training machine of  claim 2 , wherein the input portion is a gripping portion the user grips or a footrest portion the user steps on. 
     
     
         17 . The load transmission mechanism unit for the training machine of  claim 2 , wherein the connection joint portion includes a plurality of universal joints, which are connected to each other, as main members. 
     
     
         18 . The load transmission mechanism unit for the training machine of  claim 2 , wherein the first rotation transmission unit is a transmission chain,
 wherein the main driving shaft portion includes a main-driving-shaft sprocket,   the intermediate shaft portion includes an intermediate-shaft sprocket, and   the transmission chain is suspended between the main-driving-shaft sprocket and the intermediate-shaft sprocket.   
     
     
         19 . The load transmission mechanism unit for the training machine of  claim 2 , wherein the second rotation transmission unit includes:
 an intermediate-shaft bevel gear provided in the intermediate-shaft portion; and   a crank-shaft bevel gear provided in the crank shaft portion to be engaged with the intermediate-shaft bevel gear.   
     
     
         20 . The load transmission mechanism unit for the training machine of  claim 16 , wherein the gripping portion is an annular member.