JP2009117387A - Conductive structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conductive structure which can be manufactured at a low cost and can maintain and stabilize a conductive status. <P>SOLUTION: The conductive structure is composed of a conductive rotating axis 16, a conductive rotating body 20 which rotates together with the rotating axis 16 around an axis of the rotating axis 16, a conductive cylindrical portion 24 which is provided on the rotating body 20 and rotates together with the rotating body 20 in a state that the rotating axis 16 is inserted, and a coil spring which is provided between the rotating axis 16 and the cylindrical portion 24 and contacts with the rotating axis 16 and the cylindrical portion 24, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a conductive structure that allows one member and the other member to be stably energized.

  Conventionally, so-called slip rings and brushes (hereinafter referred to as “brush method” as appropriate) have been used to enable energization between the rotating shaft and the outside. In this brush method, accessories such as a brush holder for attaching the brush are required, and there is a problem that a space for providing the accessories is required. Further, there is a problem that the energization becomes unstable due to the brush floating due to vibration and impact. Further, when a slip ring and a brush are used, there is a problem that the weight is increased and the cost is increased.

  Note that the above prior art is a public technique, and the present invention has been developed based on the public technique. For this reason, the applicant does not know the existence of a document known invention related to the present invention at the time of filing a patent application, and omits the description of the name of the document known invention and the location of other information related to the document known invention.

  In view of the above circumstances, an object of the present invention is to provide a conductive structure that can be manufactured at a lower cost than a brush method and that can maintain and stabilize the energized state.

  The invention according to claim 1 is a conductive rotating shaft, a conductive rotating body that is integrally formed with the rotating shaft and rotates around the rotating shaft, and the rotating shaft is rotatable. A conductive bearing member to be supported, and a coil spring provided between the rotating shaft and the bearing member and respectively contacting the rotating shaft and the bearing member.

  According to the first aspect of the present invention, since the rotating shaft, the bearing member, the rotating body and the coil spring are all conductive, the rotating shaft to the rotating body can be electrically connected. Thereby, the energization state of a rotating shaft and a rotary body can be enabled. In particular, since the coil spring is in contact with the rotating shaft and the bearing member, the bearing member can also be electrically connected.

  Further, by using an existing coil spring to enable the energized state, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by freely elastically deforming the coil spring. Furthermore, since the conventionally used brush and brush holder are not required, a space for providing these is also unnecessary, and a reduction in size can be realized.

  According to a second aspect of the present invention, in the conductive structure according to the first aspect, the rotating body is a wheel of a train.

  According to the second aspect of the present invention, the stability of the energized state between the axle and the wheel can be improved as described above even when the rotating body is used for a train wheel in which the wheel and the axle are not integrated. Therefore, the presence detection of the railway vehicle can be performed very accurately through the rail.

  Further, another first invention different from the inventions according to claims 1 and 2 includes a conductive rotating shaft, a conductive rotating body that rotates together with the rotating shaft around the rotating shaft, and the rotating body. A conductive cylindrical portion that is provided and rotates together with the rotating body in a state where the rotary shaft is inserted, and is provided between the rotary shaft and the cylindrical portion, and is in contact with the rotary shaft and the cylindrical portion, respectively. And a coil spring.

  According to another 1st invention, since a rotating shaft, a cylindrical part, a rotary body, and a coil spring are all electroconductivity, it can be in the state electrically connected from the rotary shaft to the rotary body. In this way, the rotating shaft and the rotating body are not integrally formed, and even when both are manufactured separately and then assembled together, the members from the rotating shaft to the rotating body can be used without using a member such as a cable. It can be energized.

  Further, by using the existing coil spring, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Furthermore, since the conventionally used brush and brush holder are not required, a space for providing these is also unnecessary, and a reduction in size can be realized. Furthermore, even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by the elastic deformation of the coil spring.

  Another second invention is characterized in that, in the conductive structure according to the other first invention, the cylindrical portion is integrally formed with the rotating body.

  According to another 2nd invention, since the cylindrical part is integrally formed in the rotary body, the electricity supply performance between a cylindrical part and a rotary body can be improved. In addition, since the number of parts is reduced, it is possible to reduce the assembly man-hour and manufacturing cost of the conductive structure.

  Another third aspect of the invention relates to a conductive fixed shaft that does not rotate, a conductive rotary member that rotates about the axis of the fixed shaft, and the rotary member that is provided on the rotary member and in which the fixed shaft is inserted. And a conductive cylindrical portion rotating together with the coiled spring provided between the fixed shaft and the cylindrical portion and contacting the fixed shaft and the cylindrical portion, respectively.

  According to the invention described in another third invention, since the fixed shaft, the cylindrical portion, the rotating body, and the coil spring are all conductive, the fixed shaft to the rotating body can be electrically connected. Thereby, the energization state of a fixed shaft and a rotary body can be enabled. Thus, the fixed shaft and the rotating body are not integrally formed, and even when both are manufactured separately and then assembled together, the fixed shaft to the rotating body can be energized.

  Further, by using the existing coil spring, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by freely elastically deforming the coil spring. Furthermore, since the conventionally used brush and brush holder are not required, a space for providing these is also unnecessary, and a reduction in size can be realized.

  In addition, since this invention is a structure which a rotary body rotates with respect to the fixed axis | shaft fixed, it can be widely used for drive mechanisms, such as a windmill, for example.

  Another fourth invention is characterized in that, in the conductive structure according to another third invention, the cylindrical portion is integrally formed with the rotating body.

  According to another 4th invention, since the cylindrical part is integrally formed in the rotary body, the electricity supply performance between a cylindrical part and a rotary body can be improved. Further, since the number of parts is reduced, the number of assembling steps and the manufacturing cost can be reduced.

  Another fifth aspect of the invention relates to a conductive rotating shaft, a conductive rotating body that rotates together with the rotating shaft around the rotating shaft, and the rotating shaft inserted in the rotating body. An electrically conductive cylindrical portion that rotates together with the rotating body, and an electrical conductivity that is provided between the rotating shaft and the cylindrical portion and transmits the rotating shaft or the rotational force of the rotating body to the rotating body or the rotating shaft. A driving force transmitting member, and a coil spring provided between the driving force transmitting member and the rotating shaft or the cylindrical portion, and contacting the driving force transmitting member and the rotating shaft or the cylindrical portion, respectively. It is characterized by having.

  According to another 5th invention, since a rotating shaft, a driving force transmission member, a coil spring, a cylindrical part, and a rotary body are all conductive, it makes the state from which the rotary shaft to the rotary body were electrically connected. be able to. Thereby, the energization state of a rotating shaft and a rotary body can be enabled. In this way, the rotating shaft and the rotating body are not integrally formed, and even when both are manufactured separately and then assembled together, the members from the rotating shaft to the rotating body can be used without using a member such as a cable. It can be energized.

  In addition, by using an existing coil spring, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by freely elastically deforming the coil spring. Furthermore, since the conventionally used brush and brush holder are not required, a space for providing these is also unnecessary, and a reduction in size can be realized.

  On the other hand, when the rotating shaft rotates, the rotating force of the rotating shaft is transmitted to the rotating body via the driving force transmitting member. Thereby, a rotational driving force is generated in the rotating body and rotates. Conversely, the rotational force of the rotating body is transmitted to the rotating shaft via the driving force transmitting member.

  Thus, since the coil spring is in contact with the driving force transmission member and the rotating shaft or the cylindrical portion, respectively, it is possible to achieve both driving force transmission performance and energization performance. It can be widely used for the wheel shafts of vehicles that are required.

  Another sixth aspect of the invention relates to a conductive rotating shaft, a conductive rotating body that rotates together with the rotating shaft around the rotating shaft, and the rotating shaft that is provided in the rotating body and inserted into the rotating shaft. An electrically conductive cylindrical portion that rotates together with the rotating body, and an electrical conductivity that is provided between the rotating shaft and the cylindrical portion and transmits the rotating shaft or the rotational force of the rotating body to the rotating body or the rotating shaft. And a coil spring provided between the rotating shaft and the cylindrical portion and respectively contacting the rotating shaft and the cylindrical portion.

  According to another 6th invention, since a rotating shaft, a driving force transmission member, a coil spring, a cylindrical part, and a rotary body are all electroconductive, it makes the state from the rotary shaft to the rotary body electrically connected. be able to. Thereby, the energization state of a rotating shaft and a rotary body can be enabled. In this way, the rotating shaft and the rotating body are not integrally formed, and even when both are manufactured separately and then assembled together, the members from the rotating shaft to the rotating body can be used without using a member such as a cable. It can be energized.

  Further, by using the existing coil spring, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by freely elastically deforming the coil spring. Furthermore, since the conventionally used brush and brush holder are not required, a space for providing these is also unnecessary, and a reduction in size can be realized.

  On the other hand, when the rotating shaft rotates, the rotating force of the rotating shaft is transmitted to the rotating body via the driving force transmitting member. Thereby, a rotational driving force is generated in the rotating body and rotates. Conversely, the rotational force of the rotating body is transmitted to the rotating shaft via the driving force transmitting member. As described above, since the driving force transmission member and the coil spring are in contact with the rotating shaft and the cylindrical portion, respectively, both the driving force transmission performance and the energization performance can be achieved. It can be used for a wide range of necessary vehicle axles.

  Another seventh invention is the conductive structure according to the sixth invention, wherein the driving force transmission member is provided between the rotating shaft and the cylindrical portion, and the coil spring. It has the division member which divides | segments from the 2nd area | region in which is provided.

  According to another seventh invention, since the driving force transmission member and the coil spring are in contact with the rotating shaft and the cylindrical portion, respectively, a predetermined pressure acts on the driving force transmission member and the coil spring when the driving force is transmitted. . Here, between the rotating shaft and the cylindrical portion, a partitioning member that partitions the first region where the driving force transmission member is provided and the second region where the coil spring is provided is provided. The movement of the coil spring to the first region or the movement of the driving force transmission member to the second region can be prevented. In particular, when a coil spring or a driving force transmission member is damaged due to deterioration or wear, it is possible to prevent each piece from entering another region.

  Another eighth invention is the conductive structure according to any one of the fifth to seventh inventions, wherein the cylindrical portion is integrally formed with the rotating body. .

  According to another 8th invention, since the cylindrical part is integrally formed by the rotary body, the electricity supply performance between a cylindrical part and a rotary body can be improved. In addition, since the number of parts is reduced, it is possible to reduce the assembly man-hour and manufacturing cost of the conductive structure.

  Another ninth aspect of the present invention is the conductive structure according to any one of the fifth to eighth aspects of the present invention, wherein the driving force transmission member is positioned on the rotating shaft and the cylindrical portion. Each of the groove portions is formed.

  According to another ninth invention, when the driving force transmission member is provided in the groove portion, the driving force transmission member is positioned by the groove portion. As a result, transmission of force by the driving force transmission member is ensured.

  Moreover, when the coil spring is provided in the driving force transmission member, the coil spring can also be positioned by positioning the driving force transmission member. As a result, when a plurality of driving force transmission members are provided, the driving force transmission member is not biased toward a part of the cylindrical part or the rotating shaft, and the coil spring is also a part of the cylindrical part or the rotating shaft. Therefore, the stability of the energized state between the rotating shaft and the rotating body can be maintained.

  Another tenth aspect of the invention is the conductive structure according to any one of the fifth aspect of the invention, the eighth aspect of the invention, or the ninth aspect of the invention, wherein the coil spring is an outer surface of the driving force transmission member. Are wound along a direction substantially orthogonal to the axial direction of the driving force transmitting member.

  According to another tenth invention, since the coil spring is wound around the outer surface of the driving force transmission member along a direction substantially orthogonal to the axial direction of the driving force transmission member, the coil spring is driven. It becomes the structure which contacts over the outer surface of a force transmission member. For this reason, even when vibration or impact occurs, the coil spring is not separated from the driving force transmission member, and the energized state between the rotating shaft and the rotating body can be maintained.

  Another eleventh aspect of the invention is the conductive structure according to any one of the fifth aspect of the invention, the eighth aspect of the invention, the ninth aspect of the invention, the tenth aspect of the invention, and the outside of the driving force transmission member. A concave portion is formed on the surface, and the coil spring is provided in the concave portion.

  According to another 11th invention, since the coil spring is provided in the recessed part formed in the outer surface of a driving force transmission member, position shift with respect to the driving force transmission member of a coil spring can be prevented. Thereby, the contact position of the coil spring can be stabilized, and the stability of the energized state between the rotating shaft and the rotating body can be maintained even when vibration or impact occurs.

  Further, when the coil spring receives pressure from the rotating shaft or the cylindrical portion, the coil spring is elastically deformed and hidden inside the recess, so that the coil spring itself can be prevented from being damaged by the pressure. Furthermore, by contacting the driving force transmission member, the rotating shaft or the cylindrical portion with the coil spring elastically deformed, the contact pressure between them can be increased, and the stability of the energized state between the rotating shaft and the rotating body can be improved. Further improvement can be achieved.

  Another twelfth invention is the conductive structure according to another eleventh invention, wherein the recess is formed along an axial direction of the driving force transmitting member.

  According to another 12th invention, since the recessed part is formed along the axial direction of a driving force transmission member, more recessed parts can be formed. Thereby, more coil springs can be provided, and the number of contact points of the coil springs increases, so that the stability of the energization performance between the rotating shaft and the rotating body can be further improved.

  Another thirteenth invention is characterized in that, in the conductive structure according to another eleventh invention, the recess is formed to be inclined with respect to the axial direction of the driving force transmission member.

  According to another thirteenth invention, since the recess is formed to be inclined with respect to the axial direction of the driving force transmission member, the recess is compared with a case where the recess extends along the axial direction of the driving force transmission member. Can be lengthened. Thereby, the length of the coil spring provided in the recess can also be increased, and the contact resistance of the coil spring with respect to the rotating shaft and the rotating body can be further reduced. As a result, the stability of the energized state between the rotating shaft and the rotating body can be further improved. Further, since the recess is formed to be inclined with respect to the axial direction of the driving force transmission member, it is possible to prevent the conductivity from being lowered at a specific location.

  Another 14th invention is another 1st invention, another 2nd invention, another 5th invention, another 6th invention, another 7th invention, another 8th invention, another 9th invention, another In the conductive structure according to any one of the tenth invention, another eleventh invention, another twelfth invention, and another thirteenth invention, the rotating body is a wheel of a train. .

  According to another 14th invention, even when the rotating body is used for a train wheel in which the wheel and the axle are not integrated, the stability of the energized state between the axle and the wheel can be improved as described above. The presence line detection of the railway vehicle can be performed very accurately through the rail.

  In the first aspect of the invention, since the rotating shaft, the bearing member, the rotating body, and the coil spring are all conductive, the rotating shaft to the rotating body can be electrically connected. Thereby, the energization state of a rotating shaft and a rotary body can be enabled. In particular, since the coil spring is in contact with the rotating shaft and the bearing member, the bearing member can also be electrically connected.

  Further, by using an existing coil spring to enable the energized state, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by freely elastically deforming the coil spring. Furthermore, since the conventionally used brush and brush holder are not required, a space for providing these is also unnecessary, and a reduction in size can be realized.

  According to the second aspect of the present invention, the stability of the energized state between the axle and the wheel can be improved as described above even when the rotating body is used for a train wheel in which the wheel and the axle are not integrated. The presence line detection of the railway vehicle can be performed very accurately through the rail.

  In another first aspect of the invention, since the rotating shaft, the cylindrical portion, the rotating body, and the coil spring are all conductive, the rotating shaft to the rotating body can be electrically connected. In this way, the rotating shaft and the rotating body are not integrally formed, and even when both are manufactured separately and then assembled together, the members from the rotating shaft to the rotating body can be used without using a member such as a cable. It can be energized.

  Further, by using the existing coil spring, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by freely elastically deforming the coil spring. Furthermore, since the conventionally used brush and brush holder are not required, a space for providing these is also unnecessary, and a reduction in size can be realized.

  Another 2nd invention can improve the electricity supply performance between a cylindrical part and a rotary body, since the cylindrical part is integrally formed in the rotary body. In addition, since the number of parts is reduced, it is possible to reduce the assembly man-hour and manufacturing cost of the conductive structure.

  In another third invention, since the fixed shaft, the cylindrical portion, the rotating body, and the coil spring are all conductive, the fixed shaft and the rotating body can be electrically connected. Thereby, the energization state of a fixed shaft and a rotary body can be enabled. Thus, the fixed shaft and the rotating body are not integrally formed, and even when both are manufactured separately and then assembled together, the fixed shaft to the rotating body can be energized.

  Further, by using the existing coil spring, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by freely elastically deforming the coil spring. Furthermore, since the conventionally used brush and brush holder are not required, a space for providing these is also unnecessary, and a reduction in size can be realized.

  Another 4th invention can improve the electricity supply performance between a cylindrical part and a rotating body since a cylindrical part is integrally formed in the rotating body. Further, since the number of parts is reduced, the number of assembling steps and the manufacturing cost can be reduced.

  Another fifth aspect of the invention is that the rotating shaft, the driving force transmission member, the coil spring, the cylindrical portion, and the rotating body are all conductive, so that the rotating shaft to the rotating body can be electrically connected. it can. Thereby, the energization state of a rotating shaft and a rotary body can be enabled. In this way, the rotating shaft and the rotating body are not integrally formed, and even when both are manufactured separately and then assembled together, the members from the rotating shaft to the rotating body can be used without using a member such as a cable. It can be energized.

  Further, by using the existing coil spring, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by freely elastically deforming the coil spring. In addition, since the brush and the brush holder that have been used conventionally are not required, a space for providing these is also unnecessary, and the miniaturization can be realized.

  Furthermore, since the coil spring is in contact with the driving force transmission member and the rotating shaft or the cylindrical portion, respectively, both the driving force transmission performance and the energization performance can be achieved. It can be used widely for wheel shafts of various vehicles.

  In another sixth invention, the rotating shaft, the driving force transmission member, the coil spring, the cylindrical portion, and the rotating body are all conductive, so that the rotating shaft to the rotating body can be electrically connected. it can. Thereby, the energization state of a rotating shaft and a rotary body can be enabled. In this way, the rotating shaft and the rotating body are not integrally formed, and even when both are manufactured separately and then assembled together, the members from the rotating shaft to the rotating body can be used without using a member such as a cable. It can be energized.

  Further, by using the existing coil spring, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by freely elastically deforming the coil spring. In addition, since the brush and the brush holder that have been used conventionally are not required, a space for providing these is also unnecessary, and the miniaturization can be realized.

  Further, since the driving force transmission member and the coil spring are in contact with the rotating shaft and the cylindrical portion, respectively, both the driving force transmission performance and the energization performance can be achieved. It can be widely used for vehicle axles.

  In another seventh aspect of the invention, since the driving force transmission member and the coil spring are in contact with the rotating shaft and the cylindrical portion, respectively, a predetermined pressure acts on the driving force transmission member and the coil spring when the driving force is transmitted. Here, between the rotating shaft and the cylindrical portion, a partitioning member that partitions the first region where the driving force transmission member is provided and the second region where the coil spring is provided is provided. The movement of the coil spring to the first region or the movement of the driving force transmission member to the second region can be prevented. In particular, when a coil spring or a driving force transmission member is damaged due to deterioration or wear, it is possible to prevent each piece from entering another region.

  In another eighth aspect of the present invention, since the cylindrical portion is integrally formed with the rotating body, the energization performance between the cylindrical portion and the rotating body can be improved. In addition, since the number of parts is reduced, it is possible to reduce the assembly man-hour and manufacturing cost of the conductive structure.

  In another ninth invention, when the driving force transmission member is provided in the groove, the driving force transmission member is positioned by the groove. As a result, transmission of force by the driving force transmission member is ensured.

  Moreover, when the coil spring is provided in the driving force transmission member, the coil spring can also be positioned by positioning the driving force transmission member. As a result, when a plurality of driving force transmission members are provided, the driving force transmission member is not biased toward a part of the cylindrical part or the rotating shaft, and the coil spring is also a part of the cylindrical part or the rotating shaft. Therefore, the stability of the energized state between the rotating shaft and the rotating body can be maintained.

  In another tenth aspect of the invention, since the coil spring is wound around the outer surface of the driving force transmission member along a direction substantially orthogonal to the axial direction of the driving force transmission member, the coil spring transmits the driving force. It becomes the structure which contacts over the outer surface of a member. For this reason, even when vibration or impact occurs, the coil spring is not separated from the driving force transmission member, and the energized state between the rotating shaft and the rotating body can be maintained.

  In another eleventh aspect of the invention, since the coil spring is provided in the recess formed on the outer surface of the driving force transmission member, it is possible to prevent displacement of the coil spring with respect to the driving force transmission member. Thereby, the contact position of the coil spring can be stabilized, and the stability of the energized state between the rotating shaft and the rotating body can be maintained even when vibration or impact occurs.

  Further, when the coil spring receives pressure from the rotating shaft or the cylindrical portion, the coil spring is elastically deformed and hidden inside the recess, so that the coil spring itself can be prevented from being damaged by the pressure. Furthermore, by contacting the driving force transmission member, the rotating shaft or the cylindrical portion with the coil spring elastically deformed, the contact pressure between them can be increased, and the stability of the energized state between the rotating shaft and the rotating body can be improved. Further improvement can be achieved.

  In another twelfth aspect of the invention, since the recess is formed along the axial direction of the driving force transmission member, more recesses can be formed. Thereby, more coil springs can be provided, and the number of contact points of the coil springs increases, so that the stability of the energization performance between the rotating shaft and the rotating body can be further improved.

  In another thirteenth aspect of the present invention, since the recess is formed to be inclined with respect to the axial direction of the driving force transmission member, the length of the recess is longer than when extending along the axial direction of the driving force transmission member. The length can be increased. Thereby, the length of the coil spring provided in the recess can also be increased, and the contact resistance of the coil spring with respect to the rotating shaft and the rotating body can be further reduced. As a result, the stability of the energized state between the rotating shaft and the rotating body can be further improved. Further, since the recess is formed to be inclined with respect to the axial direction of the driving force transmission member, it is possible to prevent the conductivity from being lowered at a specific location.

  Another 14th invention can improve the stability of the energized state between the axle and the wheel as described above even when the rotating body is used for a train wheel in which the wheel and the axle are not integrated. The presence detection of the railway vehicle can be performed very accurately via the.

1 is an exploded view of a conductive structure according to a first embodiment of the present invention. It is a side view of the coil spring which comprises the electrically conductive structure which concerns on 1st Embodiment of this invention. It is the elements on larger scale of the electrically-conductive structure which concerns on 1st Embodiment of this invention. (A) is a front view of the coil spring and drive force transmission member which comprise the electroconductive structure which concerns on 2nd Embodiment of this invention, (B) is the side view. It is a perspective view of the coil spring and driving force transmission member which comprise the electrically conductive structure which concerns on 3rd Embodiment of this invention. It is a perspective view of the coil spring and driving force transmission member which comprise the electrically conductive structure which concerns on 4th Embodiment of this invention.

  Next, the conductive structure according to the first embodiment of the present invention will be described with reference to the drawings.

  In the present embodiment, the conductive structure is described as an example used in a driving mechanism for a train axle. However, the present invention is not limited to this, and the conductive structure of the present invention includes one member and the other member. It can be applied to anything that needs to maintain the energized state.

  The conductive structure of the present embodiment is used for a drive mechanism for rotationally driving a train wheel. That is, as shown in FIGS. 1 to 3, an end of a metal axle (rotary shaft) 16 that is mechanically connected to a motor (not shown) and is driven to rotate by a driving force of the motor is disposed on the outer periphery of the axle 16. The inner sleeve 18 in which the protruding portions 18A and the groove portions 18B are alternately formed is formed. The inner sleeve 18 is not limited to the case where it is directly formed on the axle 16. For example, a metallic ring-shaped member (not shown) in which protrusions 18A and grooves 18B are alternately formed over the outer periphery. ) May be provided by being press-fitted into the end of the axle.

  Further, as shown in FIG. 1, a metallic outer sleeve 24 (cylindrical part) to which rotational driving force is transmitted from the axle 16 is integrally formed on the outer surface of the metallic wheel (rotating body) 20 of the train. Has been. Protrusions 24A and grooves 24B are alternately formed over the inner periphery of the outer sleeve 24.

  The outer sleeve 24 is supported by a shaft box (bearing member) 22 assembled to a carriage (not shown). A ball or the like (not shown) positioned on the outer periphery of the outer sleeve 24 is disposed inside the axle box 22, and the outer sleeve 24 is rotated with respect to the axle box 22 by this ball or the like.

  A metallic columnar member 12 (driving force transmission member) is disposed in the first region on the wheel 20 side between the groove portion 18B of the inner sleeve 18 and the groove portion 24B of the outer sleeve 24. For this reason, when the axle 16 rotates, the rotational force of the axle 16 is transmitted to the outer sleeve 24 via the inner sleeve 18 and the columnar member 12, and the wheel 20 rotates together with the outer sleeve 24.

  A metallic coil spring 14 is disposed in a second region between the groove portion 18B of the inner sleeve 18 and the groove portion 24B of the outer sleeve 24 and on the side opposite to the wheel 20 in the axial direction. For this reason, the coil spring 14 is in contact with each other at many points on the groove 18B of the inner sleeve 18 and the groove 24B of the outer sleeve 24. For this reason, it is in a state (conductive) that is electrically connected from the axle 16 to the wheel 20 via the inner sleeve 18 and the outer sleeve 24.

  Further, the coil spring 14 can be positioned by arranging the coil spring 14 between the groove 18B of the inner sleeve 18 and the groove 24B of the outer sleeve 24, and a predetermined driving force is transmitted when the driving force is transmitted. The coil spring 14 does not move on the inner sleeve 18 even when acting on the inner sleeve 18. As a result, the stability of the energized state from the axle 16 to the wheel 20 can be improved.

  Further, in a state where the inner sleeve 18 is inserted into the outer sleeve 24, a first wire member 28 for preventing the columnar member 12 from coming off and a groove portion of the inner sleeve 18 are provided on the outer periphery of the inner sleeve 18 on the wheel 20 side. A first seal member 26 is disposed for preventing the grease applied to 18B from scattering to the outside and preventing dust and dirt from entering from the outside.

  Further, in the state where the inner sleeve 18 is inserted into the outer sleeve 24, a second wire member that prevents the movement of the columnar member 12 and the coil spring 14 is provided on the outer periphery of the inner sleeve 18 on the side opposite to the wheel 20 side in the axial direction. And a second seal member 25 (sorting member) for preventing the grease applied to the groove portion 18B of the inner sleeve 18 from scattering to the outside and the entry of dust / dust from the outside. Yes. The second seal member 25 and the second wire member 27 are arranged in the vicinity of the boundary between the first region and the second region, and the cylindrical member 12 moves to the second region by providing the second wire member 27. Or the coil spring 14 is prevented from moving to the first region. Furthermore, by providing the second wire member 27, each piece of the cylindrical member 12 or the coil spring 14 generated when the cylindrical member 12 or the coil spring 14 is damaged due to wear or deterioration is mixed into other regions. Is prevented. In particular, when the fragments of the columnar member 12 or the coil spring 14 are fine particles, the second seal member 25 can prevent the fragments from entering other regions.

  Further, in a state where the inner sleeve 18 is inserted into the outer sleeve 24, a third wire member 23 for preventing the coil spring 14 from coming off is provided on the outer periphery of the inner sleeve 18 on the side opposite to the second seal member 25 in the axial direction. And third seal members 21 for preventing the grease applied to the groove portion 18B of the inner sleeve 18 from being scattered to the outside and the entry of dust / dust from the outside.

  A single coil spring 14 may be provided in one groove 18B, 24B, or a plurality of coil springs 14 may be provided.

  In the present embodiment, the first region and the second region are divided in the axial direction of the axle 16, but the present invention is not limited to this. For example, the groove portion 18B of the inner sleeve 18 and the outer sleeve 24 The cylindrical members 12 and the coil springs 14 may be alternately arranged between the groove portions 24B.

  Next, the operation of the conductive structure of this embodiment will be described.

  Since the axle 16 and the wheel 20 are each conductive and the coil spring 14 is metallic, the axle 16 and the wheel 20 are electrically connected to each other. Here, by arranging the coil spring 14 between the groove portion 18B of the inner sleeve 18 and the groove portion 24B of the outer sleeve 24, the coil spring 14 has many points on the groove portion 18B of the inner sleeve 18 and the groove portion 24B of the outer sleeve 24. Contact with. Thus, the contact resistance of the coil spring 14 with respect to the inner sleeve 18 and the outer sleeve 24 is reduced by the contact of the coil spring 14 at many points of the inner sleeve 18 and the outer sleeve 24. Further, the contact pressure can be made substantially constant by the expansion and contraction of the coil spring 14 even when vibration or impact occurs due to the wiping action of the coil spring 14 (the effect of maintaining the contact pressure by the restoring force of the coil spring 14). The coil spring 14 is not separated from the groove 18B of the inner sleeve 18 and the groove 24B of the outer sleeve 24. As a result, the energized state between the axle 16 and the wheel 20 can be maintained and stabilized, and the presence detection of the railway vehicle via the rail can be performed very accurately. Further, by maintaining and stabilizing the energized state of the axle 16 and the wheel 20, electric corrosion can be prevented.

  Further, by using the existing coil spring 14 to realize the energized state, the manufacturing cost and weight can be greatly reduced as compared with the conventional brush system. Even when vibration or impact occurs, the vibration resistance and impact resistance can be improved by freely elastically deforming the coil spring. Furthermore, since the conventionally used brush and brush holder are not required, a space for providing these is also unnecessary, and the conductive structure can be reduced in size.

  On the other hand, when the motor is driven, the axle 16 rotates. When the axle 16 rotates, the rotational driving force is transmitted through the cylindrical member 12, and the outer sleeve 24 rotates. When the outer sleeve 24 rotates, the wheel 20 rotates. Thus, the wheel 20 can be rotated by rotating the axle 16 with a motor or the like.

  Conversely, the rotational force of the wheel 20 is transmitted to the axle 16 via the outer sleeve 24, the cylindrical member 12, and the shaft inner sleeve 18.

  Here, when driving force is transmitted, a predetermined pressure is applied to the coil spring 14 from the axle 16 or the wheel 20. If pressure continues to act on the coil spring 14, the coil spring 14 deteriorates or wears. At this time, the fragments of the coil spring 14 are blocked by the second seal member 25 and the second wire member 27 and therefore do not enter the first region. As a result, even when the coil spring 14 is damaged, the driving force transmission performance is not adversely affected. Further, at the time of maintenance, only the coil spring 14 can be replaced with a new one without taking out the columnar member 12, and the maintainability can be improved.

  In the conductive structure of the present embodiment, the form in which the outer sleeve 24 is integrally formed with the wheel 20 has been described. However, the present invention is not limited to this. For example, an outer sleeve that is a separate member is attached to the wheel 20 and fixed. You may let them.

  Next, a conductive structure according to a second embodiment of the present invention will be described with reference to the drawings. In addition, description of the structure and effect which overlap with the electrically-conductive structure which concerns on 1st Embodiment is abbreviate | omitted suitably.

  As shown in FIG. 4, in the conductive structure of the present embodiment, two concave portions 56 are formed on the outer peripheral surface of the metallic cylindrical member 52, and a coil spring 54 is wound around each concave portion 56. Are connected at both ends in the longitudinal direction of the coil spring 54. Thus, the coil spring 54 is wound around the outer peripheral surface of the columnar member 52 along a direction substantially orthogonal to the axial direction of the columnar member 52 (the arrow B direction in FIG. 4A).

  Note that the number of the recesses 56 and the coil springs 54 may be singular or may be three or more.

  According to the conductive structure of this embodiment, since the coil spring 54 is in contact with the outer peripheral surface of the columnar member 52, the contact resistance of the coil spring 54 with respect to the groove portion 18B of the inner sleeve 18 and the groove portion 24B of the outer sleeve 24. Becomes smaller. As a result, even when vibration or impact occurs, it is possible to maintain the energized state of the axle 16 and the wheel 20.

  Moreover, since the coil spring 54 is provided in the recessed part 56, the position shift of the coil spring 54 with respect to the columnar member 52 can be prevented. Thus, even when vibration or impact occurs, the coil spring 54 is not separated from the cylindrical member 52, so that the energized state between the axle 16 and the wheel 20 can be maintained, and the energized state is stabilized. Can be improved.

  Further, the cylindrical member 52 is disposed between the groove portion 18B of the inner sleeve 18 and the groove portion 24B of the outer sleeve 24, and the cylindrical member 52 is positioned by the groove portions 18B and 24B. A positional shift with respect to the sleeve 18 or the outer sleeve 24 can be prevented. As a result, it is possible to prevent displacement of the coil spring 54 provided in the concave portion 56 of the cylindrical member 52 with respect to the inner sleeve 18 or the outer sleeve 24 and to improve the stability of the energized state between the axle 16 and the wheel 20. Can be made.

  On the other hand, when the motor is driven, the axle 16 rotates. When the axle 16 rotates, the rotational driving force is transmitted via the columnar member 52, and the axle box 22 rotates. When the axle box 22 rotates, the wheel 20 rotates. Thus, the wheel 20 can be rotated by rotating the axle 16 with a motor or the like.

  Conversely, the rotational force of the wheel 20 is transmitted to the axle 16 via the axle box 22.

  Here, when driving force is transmitted, a predetermined pressure acts on the coil spring 54 from the inner sleeve 18 or the outer sleeve 24, and the coil spring 54 itself is elastically deformed. When the coil spring 54 is elastically deformed, the coil spring 54 is hidden inside the recess 56. Thereby, it is possible to prevent the coil spring 54 from being damaged by the action of pressure, and at the same time, the contact pressure of the coil spring 54 with respect to the inner sleeve 18 or the outer sleeve 24 can be increased. The stability of the energized state can be improved.

  Next, a conductive structure according to a third embodiment of the present invention will be described with reference to the drawings. In addition, description of the structure and effect which overlap with the electrically conductive structure which concerns on 2nd Embodiment is abbreviate | omitted suitably.

  As shown in FIG. 5, a plurality of concave portions 76 extending along the axial direction of the cylindrical member 72 (the direction of arrow C in FIG. 5) are formed on the outer peripheral surface of the cylindrical member 72 constituting the conductive structure of the present embodiment. Each of the recesses 76 is provided with a coil spring 74.

  The number of the recesses 76 and the coil springs 74 may be singular or plural.

  According to the conductive structure of the present embodiment, the concave portions 76 are formed along the axial direction of the cylindrical member 72, so that a large number of concave portions 76 can be formed in the cylindrical member 72. As a result, more coil springs 74 can be provided, and the number of contact points of the coil springs 74 is increased, so that the energization performance between the axle 16 and the wheels 20 can be further improved.

  Next, a conductive structure according to a fourth embodiment of the present invention will be described with reference to the drawings. In addition, description of the structure and effect which overlap with the electrically conductive structure which concerns on 2nd Embodiment is abbreviate | omitted suitably.

  As shown in FIG. 6, a plurality of cylindrical members 92 constituting the conductive structure of the present embodiment have a plurality of inclined surfaces extending in an inclined direction with respect to the axial direction of the cylindrical member 92 (the direction of arrow D in FIG. 6). Recesses 96 are respectively formed, and each recess 96 is provided with a coil spring 94.

  The number of the recesses 96 and the coil springs 94 may be singular or plural.

  According to the conductive structure of the present embodiment, since the concave portion 96 extends while being inclined with respect to the axial direction of the cylindrical member 92, compared to the case where the concave portion 96 extends along the axial direction of the cylindrical member 92, The length of the recess 96 can be increased. Thereby, the length of the coil spring 94 provided in the recessed part 96 can also be lengthened, and the contact resistance with respect to the groove part 18B of the inner sleeve 18 of the coil spring 94 and the groove part 24B of the outer sleeve 24 can be made still smaller. Thereby, the stability of the energized state of the axle 16 and the wheel 20 can be further improved. Moreover, since the recessed part 96 is inclined and formed with respect to the axial direction of the cylindrical member 92, it can prevent that electroconductivity falls in a specific place.

  Next, a modified example of the conductive structure of this embodiment will be described.

  In the conductive structure of the above-described embodiment, the axle (rotating shaft) 16 and the wheel 20 (rotating body) are assembled and the configuration in which the wheel 20 rotates with the rotation of the axle 16 has been described as an example. However, the present invention is not limited to this. Further, the present invention may be applied to a configuration in which the axle (rotating shaft) 16 and the wheel 20 (rotating body) are integrally formed and both ends of the axle are rotatably supported by bearing members (for example, in a shaft box of a general vehicle). . At this time, by providing a coil spring between the axle and the bearing member, the bearing member is also electrically connected. Further, the present invention may be applied to a configuration (for example, a windmill) in which the rotating shaft is fixed to be a fixed shaft and the rotating body is rotated with respect to the fixed shaft.

12, 52, 72, 92 Cylindrical member (driving force transmission member)
14, 54, 74, 94 Coil spring 16 Axle (rotating shaft)
20 wheels (rotating body)
24 Outer sleeve (cylindrical part)
25 Second seal member (sorting member)
27 Second wire member (partitioning member)
56, 76, 96 recess

Claims (2)

  A conductive rotating shaft, a conductive rotating body that is integrally formed with the rotating shaft and rotates around the rotating shaft together with the rotating shaft, and a conductive bearing member that rotatably supports the rotating shaft; A conductive structure comprising a coil spring provided between the rotating shaft and the bearing member and contacting the rotating shaft and the bearing member, respectively.   The conductive structure according to claim 1, wherein the rotating body is a train wheel.

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