• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An axle spring (1) is provided which is capable of protecting a cylindrical rubber elastic layer (4a, 4b) from sparks and fire without sacrificing such properties as vibration resistance and durability of the cylindrical ones , elastic layer (4a, 4b) deteriorate. The axle spring (1) comprises: an outer cylinder (2); a central member (3) receiving a load transmitted from the outer cylinder (2); and cylindrical elastic layers (4a, 4b) interposed between the outer cylinder (2) and the central member (3) and each having a truncated cone shape. A cylindrical refractory cover (6) is disposed on the outer cylinder (2) and the central member (3). The lower surfaces of the cylindrical elastic layers (4a, 4b) are covered by the refractory cover (6). On the properties of the axle spring (1) per se, no influence is exercised. The cylindrical elastic layers (4a, 4b) are protected from sparks, fire and the like.
    公开号:AT517290A2
    申请号:T137/2016
    申请日:2016-03-14
    公开日:2016-12-15
    发明作者:Takeshi Masuda
    申请人:Toyo Tire & Rubber Co；
    IPC主号:
    专利说明:

    The present invention relates to an axle spring inserted between, for example, one side of a carriage frame and one side of an axle of a rail vehicle.
    In general, an axle spring provided for a railway vehicle or the like includes: an outer cylinder fixed to one side of a carriage frame; a central member which is fixed to one side of an axle and receives a load transmitted from the outer cylinder; and a cylindrical elastic layer interposed between the outer cylinder and the central member, made of rubber and having a truncated cone shape. In the axle spring having a structure as described above, the lower surface of the rubber-made cylindrical elastic layer is exposed to the outside. Accordingly, the cylindrical elastic layer is easily damaged and the axle spring as a whole is liable to be damaged.
    With respect to the axle spring comprising the externally exposed rubber-made cylindrical elastic layer as described above, Japanese Patent Laid-Open Publication No. 2007-278398 (paragraphs 0026 and 0028) discloses a technique in which a protective cover is provided covering the lower end of an elastic body for the purpose of protection from steam from a snowmelt, a snowmelt, salt water and sea air.
    The axle spring disclosed in Japanese Patent Laid-Open Publication No. 2007-278398 (paragraphs 0026 and 0028) can protect the elastic body from vapor from snowmelt, snowmelt, salt water and sea air, but it can not protect the elastic body from sparks and fire.
    To deal with this, it is conceivable to improve the properties relating to the refractoriness of the rubber constituting the cylindrical elastic layer per se. In this case, however, other properties such as vibration resistance properties and durability of the cylindrical elastic layer may deteriorate in exchange for improved fire resistance properties of the rubber.
    It is an object of the present invention to provide an axle spring which is capable of protecting a rubber-made cylindrical elastic layer from sparks and fire without deteriorating the vibration resistance and durability characteristics of the cylindrical elastic layer.
    In order to achieve the above-mentioned object, an axle spring according to the present invention comprises: an outer cylinder; a central member which receives a load transmitted from the outer cylinder; and a cylindrical elastic layer interposed between the outer cylinder and the central member and having a truncated cone shape. A cylindrical refractory cover covering a lower surface of the cylindrical elastic layer is fixed to the outer cylinder and the central member.
    According to the above-mentioned embodiment, the cylindrical refractory cover is fixed to the outer cylinder and the central member, and the lower surface of the cylindrical elastic layer is covered by the refractory cover. Consequently, the cylindrical elastic layer can be protected from sparks, fire and the like without any influence on the properties of the axle spring itself.
    In addition, the axle spring may additionally include a connection channel, which connects an inside and an outside of the refractory cover together. A
    Flow channel length of the connection channel can be selected to be greater than a thickness of the refractory cover.
    According to this embodiment, the axle spring additionally comprises the connection channel which connects the inside and the outside of the refractory cover with each other. Consequently, for example, when the axle spring is displaced during the operation of a rail vehicle, air can flow in and out through the connection channel. Accordingly, the atmospheric pressure inside the refractory cover is prevented from fluctuating and the refractory cover can be prevented from being crushed and damaged, for example, by a depression in the inside thereof.
    Moreover, a small hole having a size blocking the entrance of fire is not simply formed as a communication passage in the refractory cover, but the flow channel length of the communication passage is made longer. Thereby, the fire is prevented from entering the refractory cover through the communication passage because the inner diameter of the communication passage is made relatively large. Further, because the flow channel length of the connection channel is long, a bending portion may be appropriately formed in the connection channel. Therefore, although the inner diameter of the communication passage is made relatively large, the entrance of fire can be more reliably blocked. Accordingly, while the cylindrical elastic layer is protected from sparks and fire, the inflow and outflow of air with respect to the refractory cover is facilitated, and the atmospheric pressure inside the refractory cover can be prevented from fluctuating.
    Moreover, a separate part, such as a cylindrical metal fitting, which has a small diameter, whereby the entry of fire can be blocked, may be attached to the refractory cover as a connecting channel. Alternatively, the connection channel may be formed in the central element.
    According to this embodiment, the connection channel is formed in the central member. Consequently, a separate part can be omitted as a connecting channel. Moreover, the central member is an element fixed to one side of the axle, and the connecting channel is formed in a central journal of the central member. Thereby, a displacement of the connection channel can be reduced, when the axle spring itself is displaced, and it can be prevented that the connection channel and its environment, due to the inertial forces occurring during a displacement of the connection channel are damaged.
    As described above, according to the present invention, the cylindrical refractory cover is fixed to the outer cylinder and the central member of the axle spring. Therefore, the lower surface of the cylindrical elastic layer of the axle spring is covered by the refractory cover, and the cylindrical elastic layer can be protected from sparks, fire and the like without any influence on the properties of the axle spring itself.
    Fig. 1 is a cross-sectional view of the axle spring according to the present invention; and
    Fig. 2 is a cross-sectional view of the axle spring according to another embodiment.
    Embodiments of an axle spring according to the present invention will be described below with reference to the accompanying drawings.
    As shown in Fig. 1, an axle spring 1 is provided for a rail vehicle, for example, and comprises: an outer cylinder 2 fixed to one side of a carriage frame; a central member 3 which is fixed to one side of an axle and receives a load transmitted from the outer cylinder 2; two cylindrical elastic layers 4a and 4b interposed between the outer cylinder 2 and the central member 3 and each having a truncated cone shape; and an intermediate cylinder 5 interposed between the cylindrical elastic layers 4a and 4b and having a truncated cone shape. A cylindrical refractory cover 6 which covers the lower surface of the cylindrical elastic layers 4a and 4b is disposed on the outer cylinder 2 and the central member 3. A communication passage 7 connecting the inside and the outside of the refractory cover 6 is formed in the central member 3.
    The outer cylinder 2 is formed, for example, as a steel cylinder having an inner circumferential surface selected as a circular frusto-conical surface having a diameter increasing downward. An upper end portion of the outer cylinder 2 is fitted in the carriage frame and attached thereto. An engagement groove for engaging the refractory cover 6 is formed continuously along the circumferential direction on the outer peripheral surface of a lower end portion of the outer cylinder 2.
    The central member 3 is made of, for example, steel, has a truncated cone shape having an outer circumferential surface with the same inclination angle as the inclination angle of the inner circumferential surface of the outer cylinder 2, and is disposed below the outer cylinder 2. A platen 8 projecting outward in the radial direction is formed in a lower end portion of the central member 3, and a core pin 9 projecting downward from a central portion of the platen 8 is fitted in and attached to the side of the axle.
    Each of the cylindrical elastic layers 4a and 4b is made of cylindrical rubber having vibration-proof properties and a truncated cone shape. The inclination angles of the outer peripheral surface and the inner peripheral surface of each of the cylindrical elastic layers 4a and 4b are set equal to the angles of the inner circumferential surface of the outer cylinder 2 and the outer peripheral surface of the central element 3. The cylindrical elastic layers 4a and 4b are each vulcanized connected to the outer cylinder 2 and the central element 3.
    The intermediate cylinder 5 is formed, for example, as a steel cylinder, which has a truncated cone shape. The inclination angle of the intermediate cylinder 5 is set equal to the angles of the inner peripheral surface of the outer cylinder 2 and the outer peripheral surface of the central element 3. The intermediate cylinder 5 is bonded to the cylindrical elastic layers 4a and 4b by vulcanization.
    The refractory cover 6 is made of, for example, a refractory rubber plate of known type, which is formed into a cylindrical shape. An upper end portion 10 of the refractory cover 6 is engaged with and engaged with the engaging groove on the outer peripheral surface of the lower end portion of the outer cylinder 2. A lower end portion of the refractory cover 6 is fixed to the lower end of the central member 3 by a steel strip 11. The refractory cover 6 has a curved surface whose upper portion is substantially vertical and the lower portion thereof is substantially horizontal, and the lower one
    Cover sides of the cylindrical elastic layers 4a and 4b, to prevent the rubber portion is exposed to the outside. It should be noted that a concertina-shaped portion may be formed in the lower portion of the refractory cover 6, so that the refractory cover 6 can more easily follow the movement of the axle spring 1.
    The connection channel 7 comprises: a horizontal hole 12 formed in the central member 3; and a vertical hole 13 which reaches the lower surface of the core pin 9 from the centrally located end of the horizontal hole 12. A plurality of communication passages 7 may be formed as needed to connect the inside and the outside of the refractory cover 6 with each other.
    According to the above embodiment, since the refractory cover 6 covers the cylindrical elastic layers 4a and 4b and prevents the rubber portion from being exposed to the outside, properties concerning the refractoriness of the axle spring 1 can be improved. In addition, since the inside and the outside of the refractory cover 6 are connected to each other through the formed connecting channel 7, air can flow in and out through the connecting channel 7. Accordingly, the atmospheric pressure inside the refractory cover 6 can be prevented from being changed with the movement of the axle spring 1 and the refractory cover 6 from being damaged by a negative pressure inside the same.
    Further, since the communication passage 7 includes the horizontal hole 12 and the vertical hole 13, the flow passage length of the communication passage 7 may be set larger than the thickness of the refractory cover 6, and the communication passage 7 may be at the boundary between the horizontal hole 12 and the vertical hole 13 be bent. While the inflow and outflow of air is facilitated by the
    Flow channel cross-sectional area of the connecting channel 7 is made large, is prevented from the outside coming fire entering the refractory cover 6, so that the properties of the axle spring 1 are improved regarding the fire resistance.
    It should be noted that the present invention is not limited to the above-mentioned embodiment and can be appropriately changed within the scope of the present invention. For example, as shown in FIG. 2, a communication passage 14 composed of a separate cylindrical metal terminal may be provided near the lower end portion of the refractory cover 6 instead of the communication passage 7 formed in the central member 3 , The connecting channel 14 is long enough to prevent the entry of fire and is bent in an L-shape. In this case, since the communication passage 14 is made of a separate cylindrical metal terminal, parts other than the refractory cover 6 may have the same structure as that of a conventional axle spring. Moreover, since the communication passage 14 is disposed near the lower end of the refractory cover 6, displacement of the communication passage 14 is reduced along with displacement of the axle spring 1 and damage to the refractory cover 6 due to the inertial forces associated with the movement of the connection channel 14 can be prevented.
    Alternatively, a communication hole connecting the inside and the outside of the refractory cover 6 may be easily formed in the refractory cover 6 without the connection channels 7 and 14 being present. In a further alternative, the connection channels 7 and 14 and the connection hole under the
    Provided that a normal displacement of the axle spring 1 is suppressed to such an extent that the refractory cover 6 is not damaged by a change in the atmospheric pressure inside thereof.
    权利要求:
    Claims (3)
    [1]
    claims:
    An axle spring comprising: an outer cylinder; a central member which receives a load transmitted from the outer cylinder; and a cylindrical elastic layer interposed between the outer cylinder and the central member and having a truncated cone shape, wherein a cylindrical refractory cover covering a lower surface of the cylindrical elastic layer is fixed to the outer cylinder and the central member is.
    [2]
    2. Axle spring according to claim 1, additionally comprising a connecting channel, which connects an inner side and an outer side of the refractory cover with each other, wherein a Strömungskanallänge of the connecting channel is selected to be greater than a thickness of the refractory cover.
    [3]
    3. Axle spring according to claim 2, wherein the connecting channel is formed in the central element.
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    同族专利:
    公开号 | 公开日
    CN105987177A|2016-10-05|
    AT517290B1|2020-10-15|
    JP6506058B2|2019-04-24|
    AT517290A3|2019-08-15|
    CN105987177B|2020-01-03|
    DE102016104496A1|2016-09-29|
    JP2016173121A|2016-09-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    BE506125A|1950-10-31|
    FR2352189B3|1976-05-18|1979-02-16|Carpano & Pons|
    JPH0625561Y2|1988-02-29|1994-07-06|昭和電線電纜株式会社|Seismic isolation isolators|
    JPH0367772U|1989-10-26|1991-07-02|
    JP2947876B2|1990-05-22|1999-09-13|株式会社ブリヂストン|Fireproof structure of seismic isolation support device|
    JP2000088029A|1998-09-11|2000-03-28|Toyo Tire & Rubber Co Ltd|Vibration isolating device|
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    JP2007278398A|2006-04-07|2007-10-25|Toyo Tire & Rubber Co Ltd|Vibration control implement for vehicle|
    DE102011084684B3|2011-10-18|2013-03-28|Zf Friedrichshafen Ag|Vibration damper for vehicle bodywork, has ventilation channel including housing of terminal bearing, where housing includes center rod for elastomer body in ventilation channel that is carried out within center rod|
    CN202451691U|2012-01-11|2012-09-26|长沙市比亚迪汽车有限公司|Dust cover of damper|
    WO2014005847A1|2012-07-03|2014-01-09|Continental Teves Ag & Co. Ohg|Air spring strut|
    ES2507466B1|2014-07-24|2015-06-11|Metalocaucho, S.L.|Fire retardant spring for primary rail bogie suspensions|FR3049029B1|2016-03-18|2018-03-09|Hutchinson|ANTIVIBRATION DEVICE FOR FIRE INTENDED FOR RAILWAY APPLICATION|
    JP6789094B2|2016-12-21|2020-11-25|Ｔｏｙｏ Ｔｉｒｅ株式会社|Shaft spring|
    DE102017222009A1|2017-12-06|2019-06-06|Contitech Luftfedersysteme Gmbh|Spring device, spring system and vehicle|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2015052844A|JP6506058B2|2015-03-17|2015-03-17|Shaft spring|
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