JPS6146242B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application of the Invention] The present invention provides means for centrally positioning and supporting a wheel axle, and at least one wheel that can be pressed against a running surface and that A plane comprising a plurality of rollers supported on a roller carrier, at least one of which is drivable per surface, and a tool stand provided between the rollers, the rollers being parallel to and substantially perpendicular to the longitudinal direction of the rail. This invention relates to an underfloor wheel set lathe for machining the wheel set of a railway vehicle, which can move vertically and horizontally within the machine.

[Conventional technology]

This type of lathe, known from West German patent no. to rotate the wheels. In this case, since the drive roller is movable, there is an advantage that the distance between the center of rotation of the wheel and the cutting tool is always kept constant, resulting in good processing accuracy. However, if the cutting depth is set large so that the cutting force absorbs most of the torque transmitted from the drive roller to the wheel via frictional force, the movable roller carrier is forced to the wheel by the reaction force of the drive torque. The lathe becomes useless as it easily moves upward along the line and tries to swing around the wheel. In order to prevent this, the cutting depth must be made shallow to reduce the reaction force generated by the driving torque. Therefore,
This lathe has the disadvantage of low cutting capacity.

[Purpose of the invention]

The object of the invention is to provide an underbed wheel spindle lathe of the type mentioned at the outset, in which the cutting capacity can be increased without compromising the above-mentioned advantages of the movable drive roller.

[Structure of the invention]

This purpose is achieved in the present invention by providing a tool stand consisting of a transverse feed stand and a vertical feed stand on a tool stand holder that is movable in the longitudinal direction of the rail, and that each roller holder is mounted horizontally on a tool stand holder. This is achieved by being structurally interlockingly connected to the Here, the horizontal feed table is a feed table that moves the tool in a direction that intersects the axis of the workpiece, that is, the wheel set, that is, in the front and back direction with respect to the axis, and the vertical feed table is parallel to the axis of the workpiece, that is, the wheel set. This is a feed base that moves the tool in the direction that it is being moved. A connection that is structurally interlocked means that the roller carrier and the tool carrier are structurally interlocked and are connected to transmit force without causing slippage.

〔Effect of the invention〕

With this configuration, the reaction force of the horizontal component of the driving force of the drive roller is transmitted from the roller carrier to the movable tool carriage carrier, while the reaction force of the cutting force of the cutting tool is transmitted to the tool carriage carrier via the tool carriage. and these two reaction forces cancel each other out at the tool carriage carrier. In this way, the reaction force of the driving force of the drive roller is completely absorbed by the reaction force of the cutting force of the cutting tool, so there is no rocking movement of the roller carrier around the wheels due to the reaction force of the driving force. . Therefore, cutting can be performed using the entire output of the drive roller, ie, the cutting depth of the cutting tool can be made very large, so that the cutting capacity is greatly increased. Nevertheless, it still has the aforementioned advantages of a movable drive roller, since the roller carrier can be moved by the asymmetry of the wheels.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In the illustrated lathe, the wheel set is supported at its bearing case 2 (due to symmetry, only one bearing case is shown) by a support member 28. This support member 28 is supported on a stand 29. This platform 29 is molded onto the stand 4 and projects into the U-shaped free space of the tool carrier 5. The wheel 1 of the axle has rollers, i.e. supporting and driving rollers 6, 6', on its running surface.
Supported by. These rollers 6, 6' are fixed to drive shafts 16, 16', and
6' is rotatably and axially fixedly mounted in a common roller carrier 7. Each drive shaft 16, 16' has a sprocket 40, 4.
0' is fixed. This sprocket is connected to gears 13, 1 through chains 15, 15'.
It is drivingly connected to sprockets 41, 41' fixed to the sprockets 3'. The gearing 13, 13' is fixed on the roller carrier 7. Gear device 13,1
One motor 12, 12' is fixed on each of the motors 3'. A gear device 1 has sprockets 42, 42' fixed to the shafts of motors 12, 12'.
One sprocket 43, 43' is fixed to each of the input shafts 3, 13'. Sprocket 4
2,42' and 43,43' are chains 14,14'
are drivingly coupled to each other via. The rear end of the roller carrier 7 is supported by a universal joint 11. This swivel joint is supported by a support base 44 cast onto the stand 4. The front forked end of the roller carrier 7 has two rods 45, 45'.
Supported by. This bar material 45, 45'
The upper end is spherical and fits into a receiving part of a roller carrier 7, which is also spherical. The lower ends of the bars 45, 45' are fixed to a cross member 8, which is supported by the piston rod of the piston 9. The piston 9 slides in a support cylinder 10 fixed in the stand 4. The roller carrier 7 has rollers 22,
22'. This roller 22 is supported by a cylindrical operating member 21. The cylindrical operating member 21 is provided in the tool carriage carrier 5 so as not to rotate but to be movable in the longitudinal direction. The rotation of the cylindrical actuating member is prevented by a stud screw 46. A screw spindle 20 rotatably and immovably mounted in the tool carrier 5
allows adjustment of the longitudinal movement of the cylindrical operating member.

The roller 22' is supported by the cylindrical operating member 21'. This cylindrical operating member 21' is provided in the tool carriage carrier 5 so as not to rotate but to be movable in the longitudinal direction. Rotation of the cylindrical actuating member 21' is prevented by means of a set screw 46'.
The compression spring 23 connects the roller carrier 7 to the rollers 22 and 2.
2'. If the spring force is sufficiently large, the roller carrier 7 is moved in structural cooperation with the rollers in the longitudinal direction of the track. The tool carrier 5 is supported on both shafts 31, 31'. The shafts 31, 31' are arranged in the stand 4 concentrically with each other and perpendicular to the longitudinal direction of the rail. The tool stand carrier 5 has both rectangular spring members 17, 1 in the direction of the center axis of the wheel set.
7' to prevent movement.
This spring element is fixed to the tool carrier 5 or to the stand 4 by bolts 18, 18' and mounting pins 19, 19'. This spring member, 17,
17' is arranged such that the long sides of the rectangle are located within a radial plane centered on the central axes of the shafts 31, 31'. The tool stand carrier 5 is
A lateral guide 27 is provided on the side surface of the letter-shaped recess in a direction perpendicular to the axis of the workpiece, that is, the wheel set. On this transverse guide, a cross-feed table 26 that moves back and forth with respect to the axis of the workpiece or wheel set slides, and on a suitable guide of the cross-feed table 26 slides in a direction parallel to the axis of the workpiece or wheel set. Move to. The vertical feed table 25 carrying the cutting tool 24 slides. If the wheel is round, the center of the wheel axle 3 and the axles 31, 3
1' and the cutting surface of the cutting tool 24 are located in a vertical longitudinal plane. The centers of the drive shafts 16, 16' are located in two planes parallel to said longitudinal plane and equally spaced from said longitudinal plane, and in a common horizontal plane. Bar material 45, 45'
The central axes of the wheels are likewise located in parallel planes and in a plane perpendicular to the central axis of the wheel set.

When machining wheels of different diameters, it is only necessary to suitably change the height of each of the two rollers 6, 6'. This is because the rollers 22, 22' roll on the surface of the roller carrier 7. This plane lies in two parallel planes equidistant from the vertical longitudinal plane.

If the wheel has, for example, a flat area caused by wear due to locking of the brakes, the rollers 6, 6' follow this flat area when the wheel axle rotates, making an arcuate motion and an up-and-down movement. The center point of the circular arc movement is located at the center of the receiving part of the cross member 8, that is, at the upper end of the piston rod of the piston 9. When the center of the running surface of the wheel 1 is eccentric with respect to the center of the axle 3, the rollers 6, 6' follow this eccentric running surface and perform circular motion and, as the case may be, vertical motion.

Another embodiment of the present invention shown in FIGS. 4 and 5 is constructed as follows.

In this lathe, the wheel set is supported at its bearing case 2 (only one is shown due to symmetry) by a support member 47. This support member 47 is supported by a base 48 that is cast onto a stand 49. The wheel 1 of the axle is supported on its running surface by support and drive rollers 51, 51'. The supporting and driving rollers are rotatably supported by the respective roller carriers 53, 53' and immovably in the direction of their central axes. Each drive shaft 5
Sprockets 54, 54' are fixed to the gears 2, 52', and are drivingly connected to sprockets 56, 56' fixed to gears 55, 55' via chains 57, 57'. One motor 58, 58' is fixed to each gear device 55, 55'. Sprockets 59, 59' are fixed to the shafts of the motors 58, 58'. The gear devices 55, 55' further include sprockets 72,
72' are fixed one by one. Sprockets 59, 59' and 72, 72' are chains 30, 3
0'. The roller carrier 53' is supported by two welded levers 32, 33'. The levers 33, 33' are swingably supported on pins 60, 60' fixed to the auxiliary carrier 61. The levers 32, 32' are swingably supported on pins 34, 34' fixed to the tool stand carrier 35. The tool stand carrier 35 and the auxiliary carrier 61 are supported on a shaft 36 so that they can swing automatically and synchronously. The key 62 connects the shaft 36 and the tool stand carrier 35, and the key 63 connects the shaft 36 and the auxiliary carrier 61. The collars 64 and 65 fixed to the shaft 36 support the tool stand carrier 35 and the auxiliary carrier 6.
1 is prevented from moving in the axial direction. The lever 32 has
A pin 66 engaging a slit 67 in the lever 32'
is fixed. The slot 67 is shaped in such a way that both drive rollers 51, 51' move in the same way about their axis of symmetry. The roller carrier 53 is pushed forward by the hydraulic cylinder 37,
The roller carrier 53' is pushed forward by a hydraulic cylinder 37'. The piston rods of the cylinders 37, 37' are pivotally connected to the roller carriers 53, 53', and the cylinder case is pivotally attached to the tool carrier 35. The flat surfaces of the levers 32, 33 of the roller carriers 53, 53' are supported in the axial direction by surfaces 68, 69 of the stand 49. Furthermore, since the flat surfaces of the levers 32 and 32' and the flat surfaces of the levers 33 and 33' are in contact with each other, axial movement of the roller carriers 53, 53' is prevented.

The tool stand carrier 35 is provided with a lateral guide 38 on the side surface of the U-shaped recess. A lateral feed table 39 slides on this lateral guide. The vertical feed table 7 carrying the cutting tool 74 is moved inside the appropriate guide of the horizontal feed table 39.
3 slides. On both sides of the shaft 36, the bolts 70,7
0' is provided on the tool carrier 35. This bolt limits the travel of the tool carriage carrier 35 to the required distance and prevents the tool carriage carrier 35 from tipping over.

By means of the above measures, each lathe half always remains balanced by the cancellation of the forces that occur. However, since both lathe halves are connected to each other via the wheel set 3, when different cutting forces are generated on the cutting tool 24, rotational moment is transferred from one lathe half to the other lathe half via the wheel set 3. It is transmitted to The magnitude of this transmitted rotational moment is proportional to the difference in cutting force of the cutting tool 24. This force causes the device to lose its parallelism. Therefore, it must be prevented or balanced. To prevent this, for example, all the support and drive rollers 6, 6' of both lathe halves are driven by one drive. Thereby, the rotational torque differences are transmitted not via the wheel set 3, but via the support and drive rollers 6, 6', and all forces are canceled out. Otherwise, force cancellation is achieved if the support and drive rollers 6, 6' are moved horizontally only against a sufficiently large braking force. In this case, the magnitude of the braking force can be controlled depending on the difference in cutting forces that occur. This difference in cutting force is usually much smaller than the cutting force. Only one side of the lathe can be activated, with the other side not cutting. In this case, the drive for the inactive lathe half can be uncoupled. This prevents rotational moments from being transmitted via the wheel set 3 and the device is perfectly balanced.

[Brief explanation of the drawing]

Fig. 1 is a side view of the right half of the lathe for under-floor wheel sets, Fig. 2 is a front view of Fig. 1, Fig. 3 is a plan view of Fig. 1, and Fig. 4 is an under-floor wheel set according to another embodiment. FIG. 5 is a side view of the right half of the lathe, and FIG. 5 is a front view of FIG. 4. 3... Wheel axle, 5, 35... Tool stand carrier, 6,
6', 51, 51'...Roller, 7, 53, 53'...
Roller carrier, 25, 73... Vertical feed table, 26, 3
9...Transverse feed table, 31, 31', 36...Shaft, 34,
34'...pin.

Claims (1)

[Claims] 1. A means for centrally positioning and supporting the wheel axle, and a roller carrier that can be pressed against at least the running surface of the wheel and at least one of which can be driven per running surface. comprising a plurality of supported rollers and a tool rest disposed between the rollers, the rollers being movable vertically and horizontally in a substantially vertical plane parallel to the longitudinal direction of the track; In an underfloor wheel set lathe for machining wheel sets of railway vehicles, the cross feed tables 26, 39
and a tool stand consisting of vertical feed stands 25, 73 are provided on tool stand carriers 5, 35 movable in the longitudinal direction of the rail, and roller carriers 7, 53, 5.
3' in the horizontal direction is the tool stand carrier 5,
An underfloor wheel spindle lathe, characterized in that the underfloor wheel spindle lathe is structurally connected to the 35. 2. The tool stand carrier 5, 35 is swingable around axes 31, 31', 36 perpendicular to a plane perpendicular to the longitudinal direction of the rail. underfloor wheel spindle lathe. 3. Each roller carrier 7 is guided vertically between two rollers 22, 22' provided on the tool stand carrier 5, of which the roller 22 facing the tool rake face is fixed. 3. An underbed wheel spindle lathe according to claim 2, characterized in that the opposite roller 22' is arranged elastically. 4. Roller carriers 53, 5 each of which supports and drives rollers 51, 51' is formed from a swingable lever.
3', and the lever is supported on the tool stand carrier 35.
It can swing around pins 34, 34' provided therein, and this pin is provided perpendicularly to a plane perpendicular to the longitudinal direction of the rail, in which case the center axis of the roller and the center axis of swing are aligned. The underfloor wheel spindle lathe according to claim 1 or 2, wherein the underfloor wheel spindle lathe is located on different sides with respect to a perpendicular plane passing through the center of the axle.