JPH0428041B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention is installed on a rail grinding vehicle that can run on the rails of a railway track, and is used to remove the rail head surface (the top surface and the side surface of the rail). This invention relates to a rail head grinding device that corrects the contour of the rail head by grinding away wave-like wear and deformed layers that occur in the rail head.

"Prior Art" Wave-like wear and deformation layers occur on the head surface of the rail of a railway track at or near the contact area with the wheels of a railway vehicle running on the rail. When a railway vehicle passes over the rails, it causes severe vibrations to the railway track, roadbed, and rolling stock, which promotes destruction of the track and roadbed.
This causes inconveniences, such as impairing passenger comfort and safety, and generating noise, which may cause noise pollution along railway lines. Therefore, in order to eliminate these disadvantages, it is necessary to correct the contour of the rail head by removing the wavy wear and deformed layer on the surface of the rail head. For this reason, conventionally, as shown in FIG. 9, the front wheels 1, 1 and the rear wheels 2, 2 are used to move the rail grinding vehicle 4, which can run on the left and right rails 3, 3 of the track, from below the underframe 5. It is installed above the left and right rails 3, 3 via a plurality of storage setting hydraulic cylinders 6, and the storage setting hydraulic cylinders 6 store and hold the vehicle within the vehicle limit during forwarding, and when working, the left and right rails are A rail head milling device 7 is used, which is lowered onto 3, 3 and set to a working state.

This rail head grinding device 7 is attached to an underframe 10 of a bogie 11 consisting of front guide wheels 8, 8, rear guide wheels 9, 9, and an underframe 10 integrally configured, and is installed in a predetermined number of parts per rail on one side. , for example, has three cutting tools 12, and is controlled by a hydraulic circuit 13 shown in FIG. The hydraulic circuit 13 is driven by a prime mover (engine, electric motor, etc.) 14 and has an oil tank 15.
a hydraulic pump 17 that sucks hydraulic oil through a filter 16 and discharges pressure oil; and a storage setting hydraulic cylinder 6 that controls the storage setting hydraulic cylinder 6 by switching the pressure oil from this hydraulic pump 17 with a directional control valve 18. Hydraulic circuit 19; cutting tool 12 by cutting off or supplying pressure oil from hydraulic pump 17;
A switching valve 20 for switching between a forwarding state and a working state
and a hydraulic circuit 23 for a cutting tool, which has a pressure regulating valve 22 that can arbitrarily adjust the pressing force of the cutting tool 12 against the rail head surface via a hydraulic cylinder 21; A relief valve 24 is provided on the discharge side of the hydraulic pump 17 in order to protect the hydraulic pump 17 from damage.

Therefore, when the rail head grinding vehicle 4 is being sent, the rail head grinding device 7 is lifted up by the storage setting hydraulic cylinder 6 by setting the switching valve 18 of the storage setting hydraulic circuit 19 to the sending position 25. The directional control valve 18 is kept within the vehicle limit during work.
By setting the tool to the working position 26, the hydraulic cylinder 6 for storing and setting will naturally descend onto the rails 3, 3 by gravity, and the switching valve 20 of the cutting tool hydraulic circuit 23 will be moved from the forwarding position 27 to the working position 28. Switching the front guide wheels 8, 8 and the rear guide wheels 9,
9, the surface of the rail head can be ground by the grinding tool 12 by running on the rails 3, 3 together with the rail grinding wheel 4. Cutting tool 12
As shown schematically in FIG. 8, the rail head grinding device 7 consists of a prime mover (electric motor, hydraulic motor, pneumatic motor, etc.) 29 and a grindstone 30 that is rotationally driven by the prime mover 29. It is attached to a guide tube 32 that is movable in the vertical direction along a guide 31 fixed to the underframe 10 of the truck 11. Then, the cutting tool 12 is applied with a predetermined pressing force corresponding to the required cutting depth of the rail head surface by the hydraulic cylinder 21 attached to the guide cylinder 32 via the piston rod 33, and by the prime mover 29. While being rotated, the surface of the rail head is ground. In this case, an upper chamber 34 on the piston rod side and a lower chamber 35 on the piston side of the hydraulic cylinder 21
Pressure oil of the same pressure regulated by the pressure regulating valve 22 is supplied from the hydraulic pump 17 to the working position 28 of the switching valve 20 . Therefore, an upward force acts on the piston rod 33 of the hydraulic cylinder 21 due to the difference in piston area between the upper chamber 34 and the lower chamber 35, and this upward force is transmitted to the cutting tool 12 via the guide cylinder 32. The difference between the weight of the cutting tool 12 and the upward force acting on the piston rod 33 is applied to the cutting tool 12 as a pressing force. In general, the cutting depth of the cutting tool 12 is determined by Since it is proportional to the pressing force applied to the part surface, by adjusting the discharge pressure of the hydraulic pump 17 using the pressure valve 22, it is possible to apply a pressing force corresponding to an arbitrary cutting depth to the cutting tool 12. . In addition, in FIG. 8, out of the three cutting tools 12, only one cutting tool 12 connected to the hydraulic cylinder 21 connected to a branch circuit is shown, and the branch circuit is a branch circuit. It is omitted because it is exactly the same as the case.

"Problems to be Solved by the Invention" However, when the conventional rail head grinding device 7 is lowered onto the rails 3, 3 by the storage setting hydraulic cylinder 6 during work, the underframe 1 of the bogie 11
Since the left and right parts are integrated, the underframe 10
Due to its own torsion, the torsion of the rails 3, 3, and the unevenness of the head surfaces of the rails 3, 3, all four wheels of the front guide wheels 8, 8 and rear guide wheels 9, 9 of the bogie 11 , 3, and the cart 11 tends to be in a three-point supported or floating state. 3, 3's relative position with the head surface changes, and the convex part on the head surface of the rail 3, 3 that should be ground is not ground, or the concave part that does not need to be ground is ground, or There was a problem in that the contour of the rail head could not be corrected correctly due to irregularities in the amount of cutting.

The present invention has been made to solve the above-mentioned problems, and when the rail head milling device is lowered onto the rail from the rail milling vehicle during work, the four wheels of the front and rear guide wheels To provide a rail head grinding device capable of correctly correcting the contour of the rail head by allowing all parts to come into contact with the surface of the rail head, preventing three-point support of a truck and floating conditions.

"Means for Solving the Problems" Therefore, the present invention provides a rail head milling device that is attached to a rail milling vehicle via a hydraulic cylinder for storing and setting. An underframe with a predetermined number of grinding tools attached is provided, and these underframes are connected by a connecting device installed between the front and rear guide wheels in a direction perpendicular to the longitudinal direction of each underframe. , each underframe is connected to each other so that it can be displaced (rotated or twisted) around the axis of the coupling device, and hydraulic cylinders for storing and setting are placed near the front and rear guide wheels of each underframe, so that they are always available during work. Via the hydraulic cylinder for storage settings,
The rail head milling device is configured to apply pressurization to the front and rear guide wheels of each underframe.

"Function" If the rail head grinding device is configured as described above, when the rail head grinding device runs on the track rail together with the rail grinding vehicle during work, the underframe and rail will not be twisted. Even if the surface of the rail head is uneven, the underframe of the bogie is provided for each rail, and each underframe is connected so that it can be displaced (rotated or twisted) around the axis of the connecting device. In addition, the guide wheels at the front and rear of each underframe are constantly pressurized by the storage setting hydraulic cylinders installed in their respective vicinity, so that all the guide wheels can always come into contact with the rail head surface. The cart is not supported at three points or floats, and the relative position between the grindstone of each grinding tool and the surface of the rail head is always maintained constant.
Therefore, the surface of the rail head is evenly ground by a predetermined amount of grinding by the grinding tool, and the contour of the rail head can be corrected correctly.

“Example” An example of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view of the rail head grinding device of the present invention, FIG. 2 is a side view of FIG. 1 viewed from the direction of arrow A,
Figure 3 is a sectional view taken along line B-B in Figure 1, and Figures 4 to 6.
The figure shows another embodiment of the coupling device, FIG. 7 is a hydraulic circuit diagram, and FIG. 8 is a hydraulic circuit 19 for storing and setting the hydraulic circuit.
The construction is exactly the same as that shown in FIG. 8, except that the storage setting hydraulic circuit 41 is used to apply preload to the guide wheels. In addition, in FIG. 1 to FIG. 9, the same reference numerals indicate the same members.

In FIGS. 1 to 7, the rail head grinding device 36 is located below the underframe 5 of the rail grinding vehicle 4.
In addition, it is installed above the left and right rails 3, 3 via a plurality of, for example, four, hydraulic cylinders 6 for storage setting, and these hydraulic cylinders 6 keep the storage setting within the limits of the vehicle during forwarding. It has a cart 37 which is sometimes lowered onto the left and right rails 3, 3 and set in a working state, and a predetermined number of grinding tools 12 attached to the cart 37, for example three for each rail.

The trolley 37 is provided for each rail 3, has guide wheels 38, 38 at the front and rear, and an underframe 39 for mounting three grinding tools 12, respectively.
39, each of these underframes 39, and the front and rear guide wheels 3
8 and 38 in a direction perpendicular to the longitudinal direction of each underframe 39, and each underframe 3
Hydraulic cylinders 6 for storage setting are arranged in the vicinity of the coupling device 40 that connects the housings 9 so as to be displaceable with each other, and the guide wheels 38, 38 of each underframe 39, and during work, the hydraulic cylinders 6 for storage setting are A storage setting hydraulic circuit 41 is provided to apply a preload to each guide wheel 38 of each underframe 39 via the underframe.

As shown in FIG. 3, the connecting device 40 includes a connecting tube 43 attached to one underframe 39 with a plurality of mounting bolts 42, one end attached to the connecting tube 43 via a bearing 44, and the other end attached to the connecting tube 43 via a bearing 44. The end is another underframe 39
The connecting cylinder 43 and the connecting shaft 45 are held by an opening preventing shaft 53 which also serves as an opening stopper. Further, the underframes 39, 39 can rotate relative to each other around the axis of the coupling device 40. As a connection device, the underframes 39 may be connected by one or more leaf springs 54 as shown in FIG. 4, or the underframes 39 may be connected by the underframes 39 as shown in FIG. The front and rear ends of the underframe 3 are connected by leaf springs 54.
9 is connected to the shaft 5 via bearing devices 55, 55.
It may be pivoted at 6, or it may be pivoted at 5 as shown in Figure 6.
It is obvious that a turnbuckle device 59 consisting of a rod 57, a spherical bearing 58, and a nut 59 may be used instead of the leaf spring 54 shown in the figure.

The hydraulic circuit 46 has exactly the same configuration as that shown in FIG. 7, except that the storage setting hydraulic circuit 19 in FIG. The explanation of the part that does is omitted.

The storage setting hydraulic circuit 41 is provided between the hydraulic pump 17 and the storage setting hydraulic cylinder 6, as shown in the hydraulic circuit 46 in FIG.
A directional control valve 50 having a neutral position 48 and a set preload position 49 is provided between the directional control valve 50 and the storage setting hydraulic cylinder 6, and the guide wheels of each underframe 39 are connected via the storage setting hydraulic cylinder 6. 38,3
Pressure regulating valve 51 that can adjust the preload to be applied to
and a check valve 52 provided in parallel with this pressure regulating valve 51. Therefore, when the directional control valve 50 is placed in the storage position 47, the hydraulic pump 17
Pressure oil is supplied to the piston rod side chamber of the storage setting hydraulic cylinder 6, the piston side chamber of the storage setting hydraulic cylinder 6 communicates with the oil tank 15 through the check valve 52, and each underframe 39 receives the storage setting hydraulic pressure. When the cylinder 6 lifts the cylinder 6 to within the vehicle limit and stores it, and the directional control valve 50 is set to the preload position 49, the pressure oil from the hydraulic pump 17 becomes pressure oil at the pressure adjusted by the pressure regulating valve 51 and is set to be stored. is supplied to the piston side chamber of the hydraulic cylinder 6 for
The piston rod side chamber of the storage setting hydraulic cylinder 6 communicates with the oil tank 15, and each underframe 39 is lowered onto the rails 3, 3 by the storage setting hydraulic cylinder 6, and each guide wheel 38 of each underframe 39 has a A preload equal to the pressure adjusted by the pressure regulating valve 51 is applied by the storage setting hydraulic cylinder 6 . Moreover, when the direction control valve 50 is switched to the neutral position 48, the position before switching the direction control valve 50 to the neutral position 48,
That is, the storage position 47 or the setting/preload position 49
state can be maintained.

Therefore, during work, the storage setting hydraulic circuit 4
When the pressure regulating valve 51 of No. 1 is adjusted to a predetermined pressure and the directional control valve 50 is set to the setting/preload position 49, the pressure oil from the hydraulic pump 17 is adjusted to the predetermined pressure by the pressure regulating valve 51, and the pressure oil is adjusted to the predetermined pressure at each storage setting. On the other hand, the piston rod side chambers of each storage setting hydraulic cylinder 6 communicate with the oil tank 15, so that the rail head grinding device 36 is lowered onto the rails 3, 3. Thereafter, when the rail head grinding device 36 is run on the rails 3, 3 together with the rail grinding car 4 while the directional control valve 50 is kept at the set/preload position 49, each underframe 3 of the bogie 37
Even if 9 or each rail 3 is twisted, or even if the head surface of each rail 3 is uneven, each underframe 39 provided for each rail 3 can be aligned with the axis of the connecting device 40 by the connecting device 40. The front and rear guide wheels 38, 3 of each underframe 39 are displaceably connected to each other around the underframe 39.
8 are always given a predetermined preload by the storage setting hydraulic cylinder 6 provided near each guide wheel 8, so that each guide wheel 8 is always connected to each rail 3.
The relative position of the head surface between the grinding wheel 30 of each grinding tool 12 and each rail 3 is always constant, without the cart 37 being supported at three points or floating. Retained. Therefore, the surface of the head of each rail 3 is evenly ground by a predetermined amount of cutting by the cutting tool 12, and the contour of the head of each rail 3 can be corrected correctly.

In addition, when the rail head grinding device 36 is stored within the vehicle limit in order to transport the rail grinding vehicle 4 after the work is completed, the direction control valve 50 is moved to the storage position 4.
7, the pressure oil from the hydraulic pump 17 is supplied to the piston rod side chamber of each storage setting hydraulic cylinder 6, while the piston side chamber of each storage setting hydraulic cylinder 6 passes through the check valve 52 to the oil tank 15.
The rail head grinding device 36 communicates with the rail 3,
It is lifted up from above by each storage setting hydraulic cylinder 6 and stored and held within the vehicle limit.

In addition, during work, the grinding wheel 30 of the grinding tool 12 and the treads installed inside and outside the gauge of the rails 3, 3 at a railroad crossing etc.
If the work cannot be done due to interference with the directional control valve 5,
0 to the storage position 47, lift the rail head grinding device 36 slightly so that the grinding wheel 30 of the grinding tool 12 and the tread do not interfere, and switch the direction control valve 50 to the neutral position 48, the rail The head milling device 36 is held in that position, and the rail head milling device 36 can pass through railroad crossings and the like where it is impossible to work, without interference between the grindstone 30 of the milling tool 12 and the tread.

"Effects of the Invention" As described above, the rail head grinding device of the present invention has guide wheels at the front and rear of each rail, and an underframe on which a predetermined number of grinding tools are attached.
Each underframe is connected by a connecting device provided between the front and rear guide wheels in a direction perpendicular to the longitudinal direction of each underframe, and each underframe can be mutually displaced around the axis of this connecting device. In addition, hydraulic cylinders for storage setting are placed near the guide wheels at the front and rear of each underframe, and during work, preload is always applied to the front and rear guide wheels of each underframe via the hydraulic cylinders for storage setting. Even if the underframe or rail is twisted or the rail head surface is uneven, each guide wheel can always come into contact with the rail head surface during work, and the bogie There is no three-point support or floating condition, and the relative position between the grinding wheel of each grinding tool and the rail head surface is always maintained constant. Therefore, the surface of the rail head is evenly ground by a predetermined amount of grinding by the grinding tool, and the profile of the rail head can be corrected correctly.

[Brief explanation of drawings]

FIG. 1 is a plan view of one embodiment of the present invention, FIG. 2 is a side view of FIG. 1 viewed from the direction of arrow A, and FIG.
BB sectional view in the figure, FIGS. 4 to 6 are other embodiments of the coupling device, FIG. 7 is a hydraulic circuit diagram of the present invention, FIG. 8 is a hydraulic circuit diagram of a conventional example, and FIG. 9 is a hydraulic circuit diagram of the conventional example. FIG. 2 is a side view of a rail grinding vehicle equipped with a conventional rail head grinding device. 6... Hydraulic cylinder for storage setting, 12... Grinding tool, 17... Hydraulic pump, 23... Hydraulic circuit for grinding tool, 36... Rail head grinding device, 37...
...Dolly, 38...Guide wheel, 39...Underframe, 40
... Connecting device, 41 ... Hydraulic circuit for storage setting, 4
2... Mounting bolt, 43... Connection tube, 44... Bearing, 45... Connection shaft, 46... Hydraulic circuit, 47...
... Storage position, 48 ... Neutral position, 49 ... Setting
Preload position, 50... Directional control valve, 51... Pressure adjustment valve, 52... Check valve, 53... Stopping shaft, 54... Leaf spring, 55... Bearing device, 60...
...Turnbuckle device.

Claims (1)

[Claims] 1 It is attached to a rail grinding wheel that can run on the rails of a track via multiple storage setting hydraulic cylinders, and consists of a prime mover and a grindstone that is rotationally driven by this prime mover, and is capable of adjusting the grinding depth of the rail head surface. A predetermined number of grinding tools, whose pressing force can be adjusted according to In the rail head grinding device, which can be lowered to a rail head and run on the rail together with the rail grinding car via guide wheels, the rail head grinding device is provided for each rail, has guide wheels at the front and rear, and has a predetermined number of the rail head grinding wheels. Between the underframe on which the cutting tool is attached and the front and rear guide wheels of these underframes, the underframe is provided in a direction perpendicular to the longitudinal direction of each of the underframes, and each of the underframes is rotated around the axis thereof. a coupling device that connects each other so as to be displaceable; and the storage setting hydraulic cylinders are arranged at the front and rear of each of the underframes, respectively;
A rail head milling device comprising a storage setting hydraulic circuit that applies pressurization to the guide wheels of each of the underframes via the storage setting hydraulic cylinder during work.