JPH053484B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rail head grinding device that corrects the contour of a rail head using a rotating grindstone.
In particular, the present invention relates to a rail head grinding device that can change the inclination of a grinding unit in a cross section perpendicular to the longitudinal direction of the rail with a simple configuration.

[Prior art] As the above-mentioned rail head grinding device, there is a
As shown in Publication No. 100902, the inclination of the grinding unit support member with respect to the underframe is changed by a hydraulic jack and a pivot, and the inclination of the grinding unit support member with respect to the underframe is changed by another hydraulic jack and a pivot. By changing the inclination of the normal unit, the angle of the cutting unit relative to the rail can be changed.
There are also methods that adjust the pressing force on the surface of the rail head by moving the grinding unit support member up and down, and as shown in Japanese Patent Laid-Open No. 60-55103. Some guide rails change the angle and pressing force of the grinding unit with respect to the rail.

[Problems to be Solved by the Invention] In the former rail head grinding device, variations in the distance between the grinding wheel and the rail due to the inclination of the grinding unit are corrected by rotation of the grinding unit support member. do. In this way, since the angle and the pressing force are adjusted by interlocking all the elements, play is likely to occur and the play is large. Furthermore, since the pressing is performed via the support member, correction cannot be made when the sharpening unit is viewed from perspective. For this reason, there is a delay in responding when the whetstone rides on a protrusion, which can cause abnormal current to flow in the motor and breakage of the whetstone.

Next, in the latter rail head grinding device,
The support plate of the grinding unit is rotated along a guide rail formed in an arc concentric with the center point corresponding to the radius of curvature of the side edge of the rail. However, since the surface of the rail head is composed of three types of center points and radii, the other two rounded portions that are not applicable must be manually corrected. Furthermore, since a gap inevitably occurs between the guide rail and the support plate, play is unavoidable when the support plate slides. Furthermore, the pressing force of the grinding wheel changes as the grinding unit tilts, but since there is no compensation mechanism for this, there is a risk of motor overcurrent and damage to the grinding wheel, and there is a need for personnel to make corrections. Is required.

Therefore, the present invention has a simple configuration that reduces the backlash of the grinding unit, makes it easy to correct the pressing force of the grinding wheel, and has excellent responsiveness when the protrusion runs on the protrusion. Another object of the present invention is to provide a rail head grinding device that can prevent damage to the grindstone and is easy to maintain and manage.

[Solution Means of the Present Invention] The rail head grinding device of the present invention has a rail head in an underframe that is provided below the bogie of a rail grinding vehicle and protrudes laterally from the side edge of the bogie. A grinding unit that grinds the surface of the part and a support frame that supports this grinding unit are arranged, and the support frame has its lower end located near the rail head with respect to the cross member in the longitudinal direction of the sleeper of the underframe. The rail is supported rotatably around the longitudinal axis of the rail, and a hydraulic cylinder connected to the underframe is located approximately in the heightwise center of this support frame and can pivot around the rail's longitudinal axis. The support frame is rotatable around the shaft support by the operation of the hydraulic cylinder, and the grinding unit held by the support frame is rotated by the hydraulic cylinder provided on the support frame. It is characterized in that it is provided movably in the direction of the rotation axis of a motor that rotationally drives the grindstone.

[Function] The rail head grinding device according to the present invention moves the support frame near the lower end of the support frame for supporting the grinding unit by the operation of a hydraulic cylinder connected to approximately the center in the height direction of the support frame. The grinding wheel of the grinding unit is brought into contact with the part of the rail to be corrected, and the grinding wheel of the grinding unit is rotated around the axis that is supported in the rail at the position, that is, the axis in the longitudinal direction of the rail located near the rail head. By moving the cutting unit in the direction of the rotation axis of the motor by operating the pressure cylinder, the pressing force of the grindstone is adjusted and the wear of the grindstone is corrected.

By controlling the operation of the two hydraulic cylinders in this way, it is possible to easily adjust the angle of the grinding wheel relative to the rail head and the pressing force, and it is also possible to easily adjust the angle of the grinding wheel relative to the rail head, as well as the responsiveness to the protrusion. It is also excellent.

In addition, since the grinding unit and its support frame are arranged inside the underframe that extends laterally from the side edge of the cart, the structure of the grinding unit is easy to assemble and easy to maintain. becomes easier.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. Reference numeral 10 denotes a rail head grinding device, which is disposed below a bogie 18 of a rail grinding vehicle 16 that runs on the rail with front wheels 12 and rear wheels 14.
Reference numeral 20 denotes an underframe which is attached to the truck 18 via a connecting plate 22 and extends laterally from the side edge of the truck, and has a rectangular shape that is slightly elongated in the longitudinal direction of the sleeper. Five cross members 24, 24 including both ends are attached between the vertical members located in the longitudinal direction of the sleeper. A grinding unit 3 is installed between each horizontal member 24.
0 is arranged, and a plurality of sharpening units are arranged in parallel in the front-rear direction of the sharpening wheel 16. This grinding unit 30 includes a ring-shaped grindstone 32, a disk-shaped grindstone mounting member that holds the grindstone 32, and a motor 34 that rotates the grindstone 32 via a drive shaft.

Reference numeral 40 denotes a support frame arranged to surround and support the sharpening unit 30. This support frame 4
0 refers to two substrates 42, 42 arranged before and after the grinding unit, support plates 43, 44 installed on the upper and lower sides of these substrates 42, 42, respectively, and outer parts of these substrates 42, 42. It is constituted by support plates 45 and 46 installed in the front and back direction at two locations on the upper and lower sides of the side. And the substrates 42, 42
is a trapezoidal flat plate as a whole, and the center portion of the lower side protrudes semicircularly. Ring-shaped bearing portions 48, 48 are attached to approximately the center of this protruding portion, and the substrates 42, 42 are attached to the bearing portions 48, 48.
8 and a connecting plate 52,
It is attached and pivotally supported to the cross members 24, 24 of the underframe 20 via 52. This pivot support, especially the pivot shaft 5
The center of 0,50 is an arbitrary point within a plane that is within the inclination range when the grindstone 32 is inclined in the cross section and within the movement range of the rail contact surface of the grindstone 32 when the grindstone 32 makes an axial movement. It is located at one point. By arranging the center points of the rotation axes 50, 50 within this plane, it is possible to always bring the grinding surfaces of the grindstones 32, 32 into contact with the rail even if the grindstone 32 is tilted. The center point of the pivot shafts 50, 50 does not necessarily have to be within the above range, but it is effective if it is near the head of the rail because the deflection vibration of the grinding unit is reduced. A support shaft 5 is provided on the sides of the substrates 42, 42 and approximately at the center in the height direction.
Hydraulic cylinders 56, 56 are connected between these support shafts 54, 54 and connecting plates 58, 58 located at the lower part of the underframe 20.
are connected. This hydraulic cylinder 56, 56
By axially moving the support frame 40, the support frame 40 rotates in the cross section of the rail using the pivot shafts 50, 50 as fulcrums.

Reference numeral 62 denotes a hydraulic cylinder for vertically moving the grinding unit 30, and a rod 63 of this hydraulic cylinder 62 is fixed to the support plate 46 via a T-shaped support member 66. Since the rod 63 is fixed in this manner, the cylinder 62 is configured to perform axial movement. Further, this cylinder 62 has a U-shaped guide support member 68.
is fixed to the rod 63, and a bellows type rod protection cover 64 is provided around the rod 63.

70 is a hydraulic cylinder 62 and a grinding unit 3
0, and its upper and lower ends are attached to the support plates 43, 44 via guide support members 74, 74. Reference numeral 76 is a cylindrical guide having a circular inner section and a square outer section, and is slidably disposed on the outer side of the guide shaft 70 via a sleeve. This guide 76 is fixed to the guide support member 68 on the side surface on the hydraulic cylinder 62 side. 78 is motor 3
The motor holding member is provided on the side wall of the guide 76 and is fixed to the side surface of the guide 76 on the cutting unit 30 side. In this way, since the motor 34 is integrated with the cylinder 62 via the guide 76,
In conjunction with the axial movement of the hydraulic cylinder 62, the motor 3
4 performs vertical movement.

In the above embodiment, the rail head milling device is equipped with eight milling units 30, but this number may be increased or decreased as appropriate.

Furthermore, in the embodiment described above, the hydraulic cylinders 56 for rotating the support frame 40 are arranged on both sides of the support frame 40, but instead of this, they may be placed either in the front or the rear.

[Effects of the Invention] According to the rail head milling device of the present invention, by controlling the operation of two hydraulic cylinders,
The angle of the grindstone relative to the rail head and the pressing force can be easily adjusted. Since the grindstone for grinding is directly pressed by the hydraulic cylinder for holding the grinding unit, correction of the pressing force is simple and responsiveness when the grinding wheel runs on the protrusion is excellent. Therefore, generation of overcurrent in the motor and damage to the grindstone can be effectively prevented. Further, since the grindstone is tilted by a hydraulic cylinder for tilting the support frame, and the grindstone is pressed by a cylinder for raising and lowering the grinding unit via a guide mechanism, the overall mechanism is simplified. Further, the support frame is pivoted using a point near the rail as a fulcrum. Therefore, the backlash of the grinding unit during grinding is reduced, and vibration-proofing properties are excellent.

Moreover, in the present invention, the grinding unit and its support frame are disposed inside the underframe that is provided to project laterally from the side edge of the cart, so the configuration and mechanism of the entire device is simplified. As a result, the assembly structure and manufacture of this grinding unit part are facilitated, and maintenance and management during use are also facilitated.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the present invention, and for convenience of illustration, the underframe and its connecting plates are shown by broken lines. FIG. 2 is a cross-sectional view of parts A to A in FIG. 1, and similarly, the truck, the underframe, and the connecting plate are indicated by broken lines. FIG. 3 is a sectional view of the main part, and FIG. 4 is a side view of the rail grinding wheel and a front view of the rail head grinding device. Explanation of symbols, 10...Rail head grinding device, 2
0... Underframe, 30... Grinding unit, 32... Grindstone, 34... Motor, 40... Support frame, 42...
Substrate, 50... Rotating shaft, 56, 62... Hydraulic cylinder, 70... Guide shaft, 76... Guide.

Claims (1)

[Claims] 1. A grinding unit for grinding the surface of the rail head and a support for supporting this grinding unit are installed inside an underframe provided below the bogie of the rail grinding vehicle and projecting laterally from the side edge of the bogie. The support frame is rotatably supported in the vicinity of its lower end about an axis in the longitudinal direction of the rail located in the vicinity of the rail head with respect to the cross member in the longitudinal direction of the sleeper of the underframe, and further At approximately the center of the support frame in the height direction, a hydraulic cylinder connected to the underframe is connected so as to be pivotable about an axis in the longitudinal direction of the rail, and the operation of the hydraulic cylinder causes the support frame to support the front axis. The grinding unit held by the support frame is movable in the direction of the rotation axis of the motor that rotates the grindstone by means of a hydraulic cylinder provided in the support frame. A rail head grinding device characterized by: