Running gear for a track vehicle with a magnetic rail brake and a centering device, magnetic rail brake and centering device

Abstract

In order to provide a running gear for a tracked vehicle with a magnetic rail brake, a centering device is provided which is highly vibration damping and has a low-cost structure. A running gear (100) for a tracked vehicle is proposed, which comprises a magnetic rail brake (10) having a lifting device (11), a track rod (13) and a coil (14) attached to the track rod (13). The coil (14) and the track rod (13) are movable between a low position and a high position by the lifting device (11), and a centering device (16) is provided, which comprises a centering means (17) arranged on the track rod (13) and a centering means receiver (18) arranged on the running gear, the centering means (17) engaging with the centering means receiver (18) in the high position, and the centering device (16) comprises a damping element (23), which is arranged between the track rod (13) and the centering means (17).

Description

[Technical Field]

[0001] The present invention relates to a running gear for a track vehicle equipped with a magnetic rail brake having a lifting device, a track rod and a coil attached to the track rod, the coil and the track rod being movable between a low position and a high position by the lifting device, a centering device being provided, the centering device having centering means arranged on the track rod and centering means receivers arranged on the running gear, the centering means engaging with the centering means receivers in the high position, and the centering device having a damping element.

[0002] Furthermore, the invention relates to a magnetic rail brake for a running gear and to a centering device for a magnetic rail brake. [Background technology]

[0003] A rail vehicle may have a magnetic rail brake. The magnetic rail brake is typically attached to the rail vehicle's running gear, particularly the bogie (turning truck), and includes a coil attached to the track rod and a lifting device. The lifting device is connected to the running gear or bogie on the one hand and to the track rod on the other hand. The track rod, together with the coil, can be lowered to a low position or raised to a high position by the lifting device. In the low position, the coil of the magnetic rail brake is located directly above the rail on which the rail vehicle runs. When the coil is energized, the coil and a sliding shoe provided on the magnetic rail brake are attached to the rail. The resulting friction between the sliding shoe and the rail dissipates the kinetic energy of the rail vehicle. Furthermore, eddy currents are induced in the rail, which generate forces that counteract the motion of the rail vehicle.

[0004] In the high position, the track rod, coil, and sliding shoe of the magnetic rail brake must be fixedly locked in place to prevent vibrations and shocks. For this purpose, so-called centering devices are known in the prior art, which usually comprise a centering cone attached to the track rod and a centering cone receiver in the running gear. In the high position, the centering cone engages with the centering cone receiver, thereby fixing the track rod and coil located there against horizontal movement. A damping element is provided to reduce further vibrations of the magnetic rail brake relative to the running gear caused by acceleration forces. In the prior art, the damping element is located inside the centering cone receiver. In the high position, the centering cone abuts against a damping element located in the centering cone receiver. Vibrations from the track rod or the magnetic rail brake are transmitted to the damping element via the centering cone and are absorbed.

[0005] Known centering devices for magnetic rail brakes of running gear for track vehicles have a relatively complex structure, which makes them expensive to manufacture and maintain. Summary of the Invention

[0006] The object of the present invention is to provide a running gear for a track vehicle with magnetic rail brakes, which running gear is provided with a centering device that is highly vibration-damped and has a low-cost design.

[0007] To solve the problems inherent in the present invention, a traveling gear for a track vehicle is proposed, which includes a magnetic rail brake having a lifting device, a track rod, and a coil attached to the track rod. The coil and the track rod are movable between a low position and a high position by the lifting device, and a centering device is provided, which includes centering means arranged on the track rod and centering means receivers arranged on the drive device, the centering means engaging with the centering means receivers in the high position, and the centering device includes a damping element. It is further specified that the damping element is arranged between the track rod and the centering means.

[0008] In contrast to centering devices for magnetic rail brakes of running gear for track vehicles known from the prior art, the damping element is consequently not arranged in a centering means receptacle arranged in the running gear, but is instead located between the track rod and in particular the track rod and the centering means, which results in a more cost-effective design.

[0009] The magnetic rail brake preferably further comprises a sliding shoe. The running gear may be or comprise a bogie.

[0010] The lifting device of the magnetic rail brake is attached at a first end to the running gear of the rail vehicle, in particular to the bogie, and at a second end to the track rod. By extending and retracting the lifting device, the track rod together with the coil and the sliding shoe can be lowered to a low position or raised to a high position. In the high position, the centering means engages with the centering means receptacle from below. The centering means receptacle, sometimes also referred to as a flange, can in particular be formed in the form of a flange-like disk inserted into the running gear or the bogie.

[0011] Preferably, the centering means is a centering cone or a truncated cone.

[0012] In the context of the present invention, a centering cone is understood as a body having a conical outer surface. The centering means may be a truncated cone.

[0013] Preferably, it is provided that the damping element comprises a polymer, preferably a terpolymer, more preferably an ethylene-propylene-diene rubber, or consists of a polymer, preferably a terpolymer, more preferably an ethylene-propylene-diene rubber.

[0014] Such polymers are inexpensive and have high damping capabilities, making them particularly suitable for providing low-cost centering devices that are highly vibration damped.

[0015] The damping element is preferably configured as a disk-shaped or plate-shaped blank, in particular the damping element may be circular or annular in plan view.

[0016] As a further advantageous effect, it can be provided that no damping element is arranged between the centering means and the centering means receiver.

[0017] Therefore, compared to the prior art, it is preferred not to have a damping element arranged or attached to the centering means receiver, in other words, the centering means in an elevated position directly abuts the centering means receiver without a damping element being located between the centering means and the centering means receiver.

[0018] Furthermore, it is preferably provided that the centering means receiver has a contact surface complementary to the outer surface of the centering means, in particular to the side surface of the centering cone or truncated cone.

[0019] In the high position, the centering means preferably engages the centering means receiver from below. If the centering means is a centering cone or a truncated cone, the centering cone or the truncated cone has a side surface with a predetermined flank angle. The centering means receiver, in particular a flange or a flange disk, then has a contact surface on its lower surface that is complementary to the side surface and has the same flank angle.

[0020] More preferably, it can be provided that the centering means consists of a polymer.

[0021] Experiments by the Applicant have shown that polymer centering means can be manufactured inexpensively and provide locking security equivalent to that of metal centering means. Furthermore, the polymer centering means can itself act as a damping element.

[0022] It can be furthermore preferably provided that the centering means has a hole and the damping element has an opening aligned with the hole, the centering means being fastened to the track rod, in particular being screwed onto the track rod by fastening means, in particular screws, guided through the hole and opening.

[0023] The hole is preferably located at the center of the centering means and passes continuously through it from top to bottom. The hole may also be referred to as a bore, aperture, or duct. The hole is more preferably formed in a generally circular or round shape. The damping element has an opening. If the damping element is formed substantially as a disk of, for example, ethylene-propylene-diene rubber, the opening of the damping element is preferably formed in the center of the damping element. The damping element arranged between the track rod and the centering means is particularly arranged on the lower surface of the centering means and on the upper surface of the track rod. Through the opening aligned with the hole in the centering means, the fastening means can be guided through the centering means and damping element, preferably from the upper surface, and fastened to the track rod arranged below the damping element. If the fastening means is configured as a screw, the screw is threaded into the track rod. This allows the centering means and the damping element arranged between the centering means and the track rod to be threaded onto the track rod.

[0024] Preferably, the fastening means is a screw, in particular an M16 screw.

[0025] Of further advantage, it can be provided that the centering means have a receptacle in which the head of the fastening means, in particular the head of a screw, is located.

[0026] The receiving portion, which may also be referred to as a recess or depression, is arranged in the upper surface of the centering means, which is preferably configured as a truncated cone. The fastening means, in particular the screw, is guided from above through the hole in the centering means and the opening in the lower damping element, and is fastened to the lower track rod. The head of the fastening means, in particular the screw, is then recessed in the recess of the centering means.

[0027] It may be provided that a washer is arranged in the receiver below the head of the fastening means.

[0028] The pretension force of the fastening means is transmitted to the centering means and the damping element via the washer.

[0029] It can be furthermore preferably provided that the centering device comprises a sleeve, the sleeve being arranged in the bore of the centering means, and furthermore preferably the sleeve being arranged in the opening of the damping element.

[0030] In other words, the sleeve may be placed within the bore of the centering means and the lower portion may be placed within the opening of the damping element.

[0031] One function of the sleeve can be the transmission of the screw pretensioning force, which is transmitted completely to the sleeve or partially divided between the sleeve and the centering means with the damping element.

[0032] Furthermore, it may be provided that the total axial length of the sleeve is less than or equal to the sum of the axial lengths of the holes in the centering means and the openings in the damping element.

[0033] Preferably, it may be provided that the sleeve is arranged with radial clearance in the bore of the centering means.

[0034] The radial clearance allows tolerance compensation to be accounted for during assembly.

[0035] Advantageously, the radial clearance is between 1 mm and 5 mm, preferably about 3 mm.

[0036] More preferably, the sleeve is disposed without radial clearance in the opening of the damping element.

[0037] Preferably, the centering means is defined to have a diameter at the bottom of between 80 mm and 100 mm, preferably about 90 mm.

[0038] More preferably, it may be specified that the centering means has a height of 20 mm to 40 mm, preferably 26 mm to 34 mm.

[0039] Preferably, it may be provided that the damping element has a diameter of between 90 mm and 110 mm, preferably between 95 mm and 96 mm.

[0040] For further advantageous effect, it may be provided that the damping element has a height of between 1 mm and 5 mm, preferably between 2 mm and 4 mm.

[0041] Preferably, it may be provided that the fastening means, in particular the screws, exert a static pretensioning force on the centering means of less than 75 kN, preferably less than 70 kN, more preferably less than 65 kN.

[0042] A further solution to the problem underlying the present invention is a magnetic rail brake for a running gear such as that described above.

[0043] All functions, features and embodiments described in connection with the running gear can be transferred in a corresponding manner to the magnetic rail brake.

[0044] A further solution to the problem underlying the present invention is to provide a centering device for a magnetic rail brake.

[0045] All functions, features and embodiments described in connection with the running gear can also be applied in a corresponding manner to the centering device.

[0046] A further solution to the problem according to the invention consists in providing a centering means for a centering device.

[0047] All advantageous effects, features, embodiments and functions described in connection with the running device can be transferred in a corresponding manner to the centering means. [Brief explanation of the drawings]

[0048] [Figure 1] FIG. 1 shows part of a running gear for a track vehicle. [Figure 2a]FIG. 2a shows a cross-sectional view of a centering device known from the prior art. [Figure 2b] FIG. 2b shows an exploded view of a centering device known from the prior art. [Figure 3a] FIG. 3a shows a cross-sectional view of a centering device according to the invention. [Figure 3b] FIG. 3b shows an exploded view of a centering device according to the invention. DETAILED DESCRIPTION OF THE INVENTION

[0049] The invention will now be described in more detail with reference to the accompanying drawings.

[0050] FIG. 1 shows a magnetic rail brake 10 of a running gear 100 for a track vehicle (not shown in more detail). The magnetic rail brake 10 comprises a lifting device 11, which is realized by two pneumatic cylinders 12. The magnetic rail brake 10 further comprises a track rod 13. A coil 14 and at least one sliding shoe 15 are attached to the track rod 13. In the position shown, the pneumatic cylinder 12 of the lifting device 11 is retracted, so that the track rod 13 of the magnetic rail brake 10 is arranged in an elevated position. The running gear 100 or the magnetic rail brake 10, respectively, further comprises a centering device 16. The centering device 16 comprises a centering means 17 attached to the track rod 13. Furthermore, the centering device 16 has a centering means receptacle 18 formed as a flange disc 19. The centering means receptacle 18 is attached to a carrier of the running gear 100 (not shown in more detail for clarity).

[0051] 2a and 2b show a centering device 200 known from the prior art in cross section (FIG. 2a) and exploded view (FIG. 2b). The known centering device 200 comprises a centering cone 201, which is connected to a track rod (not shown) by means of a screw 202 guided from below through the track rod. A substantially toroidal damping element 205 is arranged on the underside 203 of a centering flange 204. In the illustrated high position, the centering cone 201 is moved into the centering flange 204 from below and abuts flush against the damping element 205, as shown in FIG. 2a.

[0052] 3a and 3b show a centering device 16 according to the invention. The centering device 16 has a centering means 17 formed as a truncated cone 20. The centering means 17 is made of a polymer. The centering means 17 or the truncated cone 20 each have a central hole 21 and a receiving portion 22 in the region of their upper surfaces. A disk-shaped damping element 23 is arranged below the centering means 17. The damping element 23 is made of ethylene-propylene-diene rubber. As shown in the cross-sectional view of FIG. 3a, a sleeve 25 is guided through the hole 21 of the centering means 17 and through the central opening 24 of the damping element 23, and the sleeve is arranged with a radial clearance in the hole 21 of the centering means 17. The sleeve 25 is flush with the opening 24 of the damping element 23. A washer 26 is arranged in the receiving portion 22 above the sleeve 25. The centering means 17 is screwed onto the track rod 13 according to FIG. 1 by means of a fastening means 28 configured as a screw 27 guided from above through a sleeve 25. The centering means receptacle 18 is fastened to a support of the running gear 100. The centering means 17 formed as a truncated cone 20 has a lateral surface 29 which, in the high position of the magnetic rail brake 10, abuts against an inner contact surface 30 of the centering means receptacle 18 that is complementary to the lateral surface 29. The diameter 31 of the damping element 23 is approximately 96 mm. The diameter 32 of the centering means receptacle 18 and of the centering means 17 is approximately 90 mm. The entire assembly of the centering means receptacle 18, the centering means 17 and the damping element 23 has a height 33 of approximately 34 mm. [Explanation of symbols]

[0053] 100 Running gear 10 Magnetic Rail Brake 11 Lifting device 12 Pneumatic cylinder 13 Track rod 14 coils 15 Sliding shoe 16 Centering Device 17 Centering means 18 Centering means receiving portion 19 Flange disc 20 truncated cone 21 holes 22 Receptor 23 Damping Elements 24 Aperture 25 sleeve 26 Washer 27 screws 28 Fastening means 29 Side 30 Contact surface 31 diameter 32 diameter 33 Height 200 Centering Device 201 Centering cone 202 Screw 203 Bottom surface 204 Centering flange 205 Damping Elements

Claims

1. A running gear (100) for a track vehicle, comprising a magnetic rail brake (10) having a lifting device (11), a track rod (13) and a coil (14) attached to the track rod (13), the coil (14) and the track rod (13) being movable between a low position and a high position by the lifting device (11), a centering device (16) being provided, the centering device (16) comprising a centering means (17) arranged on the track rod (13) and a centering means receiver (18) arranged on a carrier of the running gear, the centering means (17) engaging with the centering means receiver (18) in the high position, the centering device (16) comprising a damping element (23), the damping element (23) is arranged between the track rod (13) and the centering means (17); A running gear (100) in which the centering means (17) has a hole (21), the damping element (23) has an opening (24) aligned with the hole (21), and the centering means (17) is fastened to the track rod (13) by fastening means (28) guided through the hole (21) and the opening (24).

2. 2. The running device (100) according to claim 1, wherein the centering means (17) is a centering cone or a truncated cone (20).

3. The running device (100) according to claim 1, wherein the damping element (23) comprises a polymer, preferably a terpolymer, more preferably an ethylene-propylene-diene rubber, or consists of a polymer, preferably a terpolymer, more preferably an ethylene-propylene-diene rubber.

4. 2. The running device (100) according to claim 1, wherein the damping element (23) is a disk-shaped or plate-shaped blank.

5. 2. The running device (100) according to claim 1, wherein no damping element (23) is arranged between the centering means (17) and the centering means receiver (18).

6. 2. The running device (100) according to claim 1, wherein the centering means receiving portion (18) has a contact surface (30) complementary to the outer surface of the centering means (17), in particular to the side surface (29) of the centering cone or truncated cone (20).

7. 2. The running device (100) according to claim 1, wherein the centering means (17) is made of a polymer.

8. A running device (100) as described in claim 1, wherein the centering means (17) is screwed onto the track rod (13).

9. 2. The running device (100) according to claim 1, wherein the fastening means (28) are screws (27), in particular M16 screws.

10. 2. A running device (100) according to claim 1, wherein the centering means (17) has a receiving portion (22) in which the head of the fastening means (28), in particular the head of a screw (27), is arranged.

11. 11. The running device (100) according to claim 10, wherein a washer (26) is arranged in the receiver (22) below the head of the fastening means (28).

12. 2. The traveling apparatus (100) according to claim 1, wherein the centering device (16) comprises a sleeve (25) arranged in the hole (21) of the centering means (17), and preferably the sleeve (25) is arranged in the opening (24) of the damping element (23).

13. 13. The traveling device (100) according to claim 12, wherein the sleeve (25) is arranged in the hole (21) of the centering means (17) with a radial clearance.

14. The running device (100) according to claim 13, wherein said radial clearance is between 1 mm and 5 mm, preferably about 3 mm.

15. A traveling device (100) as described in claim 12, wherein the total axial length of the sleeve (25) is less than or equal to the sum of the axial lengths of the hole (21) of the centering means (17) and the opening (24) of the damping element (23).

16. 2. The running device (100) according to claim 1, wherein the centering means (17) has a diameter (32) at the bottom of between 80 mm and 100 mm, preferably about 90 mm.

17. 2. The running device (100) according to claim 1, wherein the centering means (17) has a height of between 20 mm and 40 mm, preferably between 26 mm and 34 mm.

18. The running device (100) according to claim 1, wherein the damping element (23) has a diameter (31) of 90 mm to 110 mm, preferably 95 mm to 96 mm.

19. The running device (100) according to claim 1, wherein the damping element (23) has a height of 1 mm to 5 mm, preferably 2 mm to 4 mm.

20. 2. The traveling device (100) according to claim 1, wherein the fastening means (28), in particular the screws (27), exert a static pretensioning force on the centering means (17) of less than 75 kN, preferably less than 70 kN, more preferably less than 65 kN.

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