JP2009227050A - Eye member of horizontal arrangement type damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To protect dust boots covering a sliding space between a shaft and a bush from snow or ice. <P>SOLUTION: The shaft 15 having a spherical part 15A extends vertically through an eye member 10 fixed at an end of a damper 1 arranged horizontally. The eye member 10 is equipped with the bush 13 provided with a spherical bearing slidingly contacting the spherical part 15A of the shaft 15; and a pair of dust boots 19 and 20 arranged at the top and bottom of the bush 13 which shield a sliding part between the spherical part 15A and the spherical bearing from the exterior. A snow fence member 21 made of rubber covers the upper dust boot 19. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to an eye member that is fixed to an end portion of a linear damper that is interposed in a horizontal direction between vehicle bodies of a railway vehicle.

Patent document 1 is disclosing the linear type horizontal damper interposed between the vehicle bodies of a railway vehicle.
These horizontal dampers are arranged on both sides of the coupler that connects the two vehicle bodies, and one end is connected to the front vehicle body and the other end is connected to the rear vehicle body, so that relative movement between the vehicle bodies is prevented. Has a dampening role.

  The damper includes a cylinder and a piston rod that protrudes slidably from the cylinder. One of the base end of the cylinder and the protruding end of the piston rod is locked to the front vehicle body, and the other is locked to the rear vehicle body.

  Eye members are respectively fixed to the base end of the cylinder and the protruding end of the piston rod. A shaft that penetrates the eye member is fixed to the vehicle body via the bracket. The shaft is supported by the eye member so as to be rotatable about a vertical axis and swingable in an integral range along an arbitrary vertical plane including the vertical axis.

  For this purpose, for example, the engaging portion of the shaft with the eye member is formed into a spherical surface, and a resin bush having a spherical bearing formed so as to wrap around the outer periphery of the spherical engaging portion is disposed on the inner periphery of the eye member. Is done. Grease is sealed in the sliding portion between the spherical bearing of the bush and the spherical portion of the eye member.

Dust boots are respectively attached to the outer periphery of the shaft above and below the bush so that water does not enter the sliding portion. The dust boots are accommodated in upward and downward recesses formed in the eye member so as to surround the shaft above and below the bush.
Japanese Patent Laying-Open No. 2005-081890

  Since the eye member is disposed outside the vehicle body, it is directly exposed to wind and snow. In addition, when removing icing or snow from the vehicle body due to maintenance of the vehicle body, ice pieces or snowflakes may fall on the eye member. As a result, the dust boots disposed in the upward recesses of the eye member are particularly likely to be damaged by icing or snowing, and are also easily damaged by icy snow falling during the maintenance of the vehicle body. The damaged dust boot causes water to enter the sliding gap between the shaft and the bush, resulting in leakage of grease in the sliding gap and wear of the sliding portion.

  Accordingly, an object of the present invention is to protect the dust boot covering the sliding gap between the shaft and the bush from snow and ice.

  In order to achieve the above object, the present invention provides a spherical bearing that is slidably contacted with a spherical portion in an eye member that is fixed to an end portion of a damper disposed in a horizontal direction and that has a shaft having a spherical portion vertically penetrated. , A pair of dust boots arranged above and below the bush to block the sliding contact portion between the spherical portion and the spherical bearing, and a snow protection member covering the upper dust boot. .

  According to this invention, damage to the dust boot due to snow or ice can be prevented by covering the upper dust boot with the snow protection member.

  Referring to FIG. 1, a double-tube linear damper 1 is an inter-vehicle damper that is horizontally disposed on both sides of a coupler between vehicle bodies so as to attenuate relative vibration between the vehicle bodies of a railway vehicle.

  The linear damper 1 includes an outer tube 2, an inner tube 3 coaxially configured inside the outer tube 2, a piston 4 that slides in the axial direction inside the inner tube 3, and an outer tube coupled to the piston 4. 2 and a piston rod 5 protruding outward in the axial direction.

  Inside the inner tube 3, two oil chambers 6 and 7 are defined by the piston 4. The oil chamber 6 on the piston rod 5 side communicates with an oil reservoir chamber 9 formed between the inner tube 3 and the outer tube 2 via a check valve 8. The oil chamber 7 on the side opposite to the piston rod 2 communicates with the oil reservoir chamber 9 via the compression side damping valve 25. The piston 4 is also provided with an expansion side damping valve and a pressure side damping valve.

  With the above configuration, the linear damper 1 generates an equivalent damping force with respect to the expansion and contraction of the piston rod 5.

  An eye member 10 is fixed to the proximal end of the outer tube 2. The eye member 11 is also fixed to the protruding end of the piston rod 5.

A cylindrical sleeve 26 that covers the piston rod 5 is fixed to the eye member 11. The sleeve 26 has an inner diameter slightly larger than the outer diameter of the outer tube 2 and overlaps a part of the outer tube 2 outside the outer periphery of the outer tube 2 as shown in the figure.
The configurations of the eye members 10 and 11 are the same. The present invention will be described below by taking the eye member 10 as an example.

  Referring to FIGS. 2A and 2B, a metal shaft 15 penetrates the eye member 10 in the vertical direction.

  A spherical portion 15 </ b> A is formed at an intermediate position of the shaft 15. Bolt holes 15B are formed in the horizontal direction at the upper and lower ends of the shaft 15. The shaft 15 is fixed to a bracket provided on the vehicle body by bolts inserted through these bolt holes 15B.

  The eye member 10 includes a metal main body 10A having a through hole, and a resin bush 13 held through a metal holder 12 inside the through hole of the main body 10A. The bush 13 includes a spherical bearing that slidably supports the spherical portion 15A of the shaft 15 on the inner periphery. By sliding between the spherical portion 15A and the spherical bearing, the shaft 15 is rotationally displaced about the vertical axis with respect to the eye member 10 and oscillating displacement within a certain range on an arbitrary vertical plane including the vertical axis. And is acceptable.

  The holder 12 is formed with annular recesses 16 and 17 surrounding the shaft 15 above and below the sliding contact portion between the spherical portion 15A and the bush 13. The bush 13 is press-fitted into the inner periphery of the holder 12 from below while being fitted to the outer periphery of the spherical portion 15 </ b> A of the shaft 15. Further, the stopper 13 is press-fitted into the recess 17 to prevent the bush 13 from falling off. Grease is interposed in the sliding contact portion between the spherical bearing of the bush 13 and the spherical portion 15A of the shaft 15 for lubrication.

  A rubber dust boot 19 is disposed inside the recess 16. The dust boot 19 is mounted on the outer periphery of the shaft 15, and the outer periphery abuts against the vertical wall surface of the recess 16, so that the upper part of the bush 13 and the spherical portion 15 </ b> A of the shaft 15 are blocked from the outside. To prevent dust from entering. A similar dust boot 20 is also arranged inside the stopper 18 of the recess 17.

  The concave portion 16 in which the upper dust boot 19 is accommodated is covered with a snow protection member 21. The snow protection member 21 is formed of a rubber plate and is attached to the outer periphery of the shaft 15. The snow protection member 21 is supported on the inner periphery by a step 15 </ b> C formed on the shaft 15. The outer periphery of the snow protection member 21 reaches the outside of the recess 16 and overlaps the upper end surface of the holder 12. The overlap amount of the snow protection member 21 and the upper end surface of the holder 12 is set so that the snow protection member 21 can keep the recess 16 in the closed state within the range of the swing displacement of the shaft 15 with respect to the eye member 10. The snow protection member 21 is provided only above the upper dust boot 19. No snow guard member is provided for the lower dust boot 20.

  The eye member 10 further includes a cover 22 for the snow protection member 21.

  The cover 22 is a cap-shaped member made of a metal material, and has a through hole 22A of the shaft 15 in the center. The cover 22 is fixed to the upper surface of the main body 10 </ b> A of the eye member 15 with a plurality of bolts 23 so as to cover the snow protection member 21. A gap is provided between the shaft 15 and the through hole 22 </ b> A so that the shaft 15 and the cover 22 do not interfere with each other within a range of swinging displacement of the shaft 15 relative to the eye member 10. On the other hand, between the outer periphery of the snow protection member 21 and the cover 22, the snow protection member 21 that is displaced in the horizontal direction contacts the cover 22 and is damaged within the range of the swing displacement of the shaft 15 relative to the eye member 10. A gap is provided so as not to occur. However, in order to give the cover 22 a function as a pressing member that prevents the snow protection member 21 from lifting from the upper end surface of the holder 12, the inner periphery of the cover 22 and the outer periphery of the snow protection member 21 are provided. The sizes of the cover 22, the snow protection member 21, and related members are set so that a sufficient overlap is ensured between them.

  The linear damper 1 is interposed between the vehicle bodies of the railway vehicle in the horizontal direction as a vehicle-body damper. Accordingly, the eye member 15 is always exposed outside the vehicle body with the dust boot 19 facing upward. The dust boot 19 has a role of preventing dust and water from entering the sliding contact portion between the bush 13 and the spherical portion 15A. However, if the dust boot 19 is always exposed upward, the dust boot 19 is easily damaged by snowfall or icing. Further, in the maintenance work of the vehicle body, ice and snow scraped off from the upper vehicle body may fall on the dust boot 19 and damage the dust boot 19. When the dust boot 19 is damaged, dust and water enter the sliding contact portion between the bush 13 and the spherical portion 15A, causing a problem such as leakage of grease and wear of the sliding surface.

  In the eye member 10, the snow-protecting member 21 covers the recess 16 in which the dust boot 19 is accommodated, thereby preventing snow and ice from entering the recess 16. Further, the cover 22 covers the outer periphery of the snow protection member 21, thereby preventing the blocky snow and ice from reaching the snow protection member 21. The cover 22 also plays a role of preventing the snow protection member 21 from floating due to the shaking or vibration of the vehicle body during traveling. Therefore, regardless of whether the railway vehicle is running or stopped, the entry of snow and ice into the recess 16 in which the dust boot 19 is accommodated is prevented, and the dust boot 19 has good performance for dustproofing and waterproofing over a long period of time. Can be maintained. Further, deterioration of the upper dust boot 19 due to ultraviolet rays can be prevented.

As mentioned above, although the Example which applied this invention to the damper between the bodies of a railway vehicle was described, the eye member by this invention is not limited to the damper between cars, but also to the yaw damper interposed between the bogie and the body of the railway vehicle Applicable. Furthermore, the eye member according to the present invention is not limited to a railway vehicle, and can be applied to all horizontal dampers that are arranged in an exposed state.
In the above embodiment, the snow protection member 21 is covered with the metal cover 22, but the cover 22 is not necessarily an essential requirement, and may be omitted depending on the use conditions of the horizontal damper.

  As described above, the eye member according to the present invention is provided with the snow protection member that shields the space above the dust boot provided in the eye member from the outside, so that the dust boot can be prevented from being damaged by snow or ice. . Therefore, by applying this invention to the eye member of a horizontal damper interposed between the bodies of a railway vehicle or between the body and the carriage, the dust boot of the eye member can be reliably damaged by snow and ice and deteriorated by ultraviolet rays. In particular, a particularly preferable effect can be obtained. Furthermore, a preferable effect can be obtained by applying the present invention also to a general industrial damper arranged horizontally.

It is a longitudinal cross-sectional view of the damper between vehicle bodies. It is the top view and vertical sectional view of the eye member by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Linear damper 2 Outer tube 3 Inner tube 4 Piston 5 Piston rod 6 Oil chamber 7 Oil chamber 8 Check valve 9 Oil reservoir chamber 10 Eye member 11 Eye member 10A Main body 12 Holder 13 Bush 15 Shaft 15A Spherical part 15B Bolt hole 15C Step 16 Recess 17 Recess 18 Stopper 19 Dust boot 20 Dust boot 21 Snow protection member 22 Cover 22A Through hole 23 Bolt 26 Sleeve

Claims (8)

In an eye member of a horizontally arranged damper that is fixed to the end of a horizontally arranged damper and has a shaft having a spherical part vertically penetrated:
A bush with a spherical bearing in sliding contact with the spherical part;
A pair of dust boots arranged on the top and bottom of the bush, which cut off a sliding contact portion between the spherical portion and the spherical bearing from the outside;
A snow guard covering the upper dust boots;
An eye member for a horizontally arranged damper, comprising: An annular recess facing the outer periphery of the shaft and the end face of the bush is further provided, the dust boot is housed in the recess, and the snow protection member is mounted on the outer periphery of the shaft so as to cover the recess. The eye member of the horizontally arranged damper as described in 1. 3. The horizontal arrangement type damper according to claim 2, wherein the snow protection member is configured by a rubber plate whose inner circumference is supported by a step formed on the shaft and whose outer circumference contacts the outer edge of the recess from above. Eye member. The eye member of the horizontal arrangement type damper according to claim 2, further comprising a cover for protecting the snow protection member. The horizontal arrangement type damper according to claim 4, wherein the cover has an outer periphery fixed to the eye member on the outer side of the concave portion, covers the outer periphery of the snow protection member, and has a shaft through hole in the center. Eye member. A clearance is provided between the through hole and the outer periphery of the shaft to allow the shaft to swing relative to the eye member, and the horizontal displacement of the snow protection member is allowed between the cover and the outer periphery of the snow protection member. The eye member of the horizontally arranged damper according to claim 5, wherein a gap is provided. The eye member of the horizontal arrangement type damper according to claim 4, wherein the cover is made of a metal material. 5. An eye member for a horizontal damper according to claim 4, wherein the snow protection member is provided only above the upper dust boot.

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