A magnetic levitation vehicle emergency wheel running device, assembly tool and assembly method thereof

Abstract

The present invention relates to the technical field of emergency wheels for magnetic levitation vehicles, and in particular to an emergency wheel running device, assembly tooling and assembly method for magnetic levitation vehicles, comprising a short shaft, a wheel center and a wheel hub, wherein the wheel center is movably mounted on one end of the short shaft via a tapered roller bearing. The emergency wheel running device, assembly tooling and assembly method for magnetic levitation vehicles of the present invention eliminate the pressure ring structure of the traditional urban rail vibration-damping wheel, achieve the purpose of structural simplification and lightweight, and realize the functions of sealing, independent rotation, adjustment of bearing clearance and anti-loosening; the vibration-damping rubber of the present invention adopts a U-shaped cross-section structure, so that it can withstand a larger vertical and lateral load ratio under limited space conditions; the present invention uses a tapered tooling interference-guided press-fitting to enable the wheel center to slide into the combination of the wheel hub and the vibration-damping rubber and wrap the vibration-damping rubber, thereby avoiding the phenomenon of displacement, folding and shear damage of the vibration-damping rubber and reducing the assembly scrap rate.

Description

Technical Field

[0001] The invention relates to the technical field of emergency wheels for magnetic levitation vehicles, in particular to an emergency wheel running device for magnetic levitation vehicles, an assembly tool and an assembly method thereof. Background Art

[0002] In the past, when a high-speed maglev vehicle broke down and stopped on the track and could not operate normally, it was often necessary to apply lubricant to the track, and the rescue vehicle had to drag the maglev vehicle to overcome the friction between the skid at the bottom of the vehicle and the track. Dragging was laborious and time-consuming, and the track was subject to significant wear. At present, there are no application cases of high-speed maglev emergency running devices at home and abroad. It is urgent to design an emergency wheel running device under limited installation space and limited weight requirements to convert the sliding friction between the skid of the faulty train and the track into rolling friction, so as to achieve rapid rescue without damage to the track. In addition, in order to further reduce the vibration impact of the emergency running device when passing through the track gap and protect the track, a running device with a vibration-damping rubber structure is used; in order to achieve the lightweight of the high-speed maglev vehicle, the running device uses lightweight materials instead of traditional steel materials.

[0003] The present invention innovatively develops a lightweight integrated structure, eliminates the compression ring structure of the traditional urban rail vibration-absorbing wheel, and adopts a U-shaped structure for the vibration-absorbing rubber, which can achieve the purpose of vibration reduction and lightweight in addition to realizing emergency rapid rescue. Patents with similar structures were found through searching: CN201811147075.7-Elastic wheel for rail vehicles, elastic wheel assembly and rail vehicle; CN201710049578.X-A method for preventing the creep of the rubber ring of an elastic wheel and an elastic wheel.

[0004] Traditional wheel assembly uses a direct interference fit method, but the emergency wheel using this method is prone to vibration damping rubber displacement, folding, shear damage, etc., causing the emergency wheel to be scrapped. At the same time, the heat accumulation at the internal connection during driving is relatively concentrated, the heat dissipation performance is limited, and the lateral support angle is also limited. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the traditional emergency wheel adopts the interference fit method, which is prone to the phenomenon of vibration-damping rubber displacement, folding, shear damage, etc., resulting in the emergency wheel being scrapped. At the same time, the heat accumulation at the internal connection during walking is relatively concentrated, the heat dissipation performance is limited, and the lateral support angle is also very limited.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an emergency wheel running device of a magnetic levitation vehicle, including a short shaft, a wheel center and a wheel hub, wherein the wheel center is movably installed at one end of the short shaft through a tapered roller bearing, the inner side of the wheel center is covered with an inner end cover located on the outer periphery of the short shaft, the outer side of the wheel center is covered with an outer end cover, a vibration-damping rubber is arranged between the wheel center and the wheel hub, an internal guide channel is opened inside the wheel center, external guide ports connected to the internal guide channel are opened on the outer side of the wheel center near the outer end cover and the vibration-damping rubber end, and internal guide ports connected to the internal guide channel are opened on the inner side of the wheel center near the inner end cover end.

[0007] An adjustment ring is arranged between the tapered roller bearings inside the wheel center.

[0008] V-shaped sealing rings and sealing stacking rings are arranged between the inner end cover and the wheel center and between the outer end cover and the wheel center.

[0009] An external hexagonal screw for assembling the short shaft is inserted on the outer side of the outer end cover.

[0010] The outer annular surface of the wheel center is provided with a C-shaped structure in which a vibration-damping rubber can be embedded, and the cross section of the vibration-damping rubber is a horizontally placed U-shaped structure.

[0011] The wheel center, inner end cover and outer end cover are all made of light alloy material.

[0012] The inner end cover and the outer end cover have lateral support covers bent toward the wheel center on their outer arc surfaces, and the lateral support covers are provided with outer air inlets with metal filters arranged inside.

[0013] An assembly tool for an emergency running device comprises a pad, a conical guide ring, and a support cylinder, and adopts the wheel center and vibration-damping rubber described in any one of claims 1 to 7.

[0014] The diameter of the large end of the conical guide ring is the same as that of the wheel center, and the diameter of the small end of the conical guide ring is equivalent to the size of the inner ring of the vibration-damping rubber.

[0015] An assembly method of an emergency running device, the main assembly process is as follows: Place the support cylinder horizontally on the press-fitting workbench, and place the assembly with the vibration-damping rubber embedded in the wheel hub on the support cylinder; Apply lubricating oil evenly on the outer ring surface of the tapered guide ring, the C-shaped outer ring surface of the wheel center, and the inner ring surface of the vibration damping rubber; Place the conical guide ring horizontally inside the combination of the wheel hub and the vibration damping rubber, and wait until the gravity of the conical guide ring and the extrusion force of the vibration damping rubber 5 are balanced before proceeding to the subsequent steps; Place the wheel center on the upper part of the conical guide ring, and then place the pad on the upper part of the wheel center; Use a press to slowly press down the pad, slowly squeeze the vibration damping rubber into the support cylinder through the conical guide ring; When the wheel center follows the conical guide ring to the vibration damping rubber position, the vibration damping rubber expands and squeezes into the C-shaped outer ring surface of the wheel center, and then the conical guide ring passes through the vibration damping rubber and falls into the support cylinder; After the pad is pressed until it contacts the wheel hub, the pressure is unloaded, the pad is removed, and the assembly of the wheel hub, the vibration-damping rubber and the wheel center is taken out, and the vibration-damping rubber assembly is completed.

[0016] The beneficial effects of the present invention are: (1) The emergency wheel running device, assembly tooling and assembly method of a magnetic levitation vehicle of the present invention eliminate the pressure ring structure of the traditional urban rail vibration reduction wheel, thereby achieving the purpose of structural simplification and lightweight, and realizing the functions of sealing, independent rotation, adjustment of bearing clearance and anti-loosening; (2) The vibration-damping rubber of the present invention adopts a U-shaped cross-sectional structure, so that it can withstand a larger vertical and lateral load ratio under limited space conditions; (3) The present invention uses the interference fit of the conical tooling to guide the press-fitting, so that the wheel center can slide into the assembly of the wheel hub and the vibration-damping rubber and wrap the vibration-damping rubber, thereby avoiding the vibration-damping rubber from shifting, folding, or shearing damage, thereby reducing the assembly scrap rate; (4) The inner end cover and the outer end cover of the present invention have lateral support covers bent toward the wheel center on their outer arc surfaces, which can support and limit the wheel center from multiple directions, with a wider support angle and area; (5) By opening an outer air inlet with a metal filter inside on the lateral support cover, the air can be quickly drawn into the internal guide channel through the rotation of the wheel center and discharged to the outside by centrifugal force, thereby improving the heat dissipation effect during the rotation process; (6) In the case of limited space and weight, the emergency wheel running device can reduce the impact between the running device and the track during the rescue process by removing the pressure ring structure and using lightweight materials, so that it can return to the maintenance section at a high speed for repair; (7) The emergency running device is isolated from external dust by means of V-shaped sealing rings and sealing stack rings provided on the inner end cover and the outer end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the initial installation structure of the assembly tool in the present invention.

[0020] Figure 3 It is a schematic diagram of the structure during the insertion process of the assembly tool in the present invention.

[0021] Figure 4It is a schematic diagram of the structure after the assembly tooling of the present invention is installed.

[0022] Figure 5 It is a schematic diagram of the structure after the conical guide ring is separated in the present invention. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Figure 1 The emergency wheel running device of a magnetic levitation vehicle shown in the figure comprises a short shaft 1, a wheel center 2 and a wheel hub 3. The wheel center 2 is movably mounted on one end of the short shaft 1 through a tapered roller bearing 4. The inner side of the wheel center 2 is sleeved with an inner end cover 5 located on the outer periphery of the short shaft, and the outer side of the wheel center 2 is sleeved with an outer end cover 6. A vibration-damping rubber 7 is arranged between the wheel center 2 and the wheel hub 3. An internal guide channel 8 is opened inside the wheel center 2. External guide ports 9 connected to the internal guide channel 8 are opened at the ends of the outer side of the wheel center 2 adjacent to the outer end cover 6 and the vibration-damping rubber 7. Internal guide ports 10 connected to the internal guide channel 8 are opened at the ends of the inner side of the wheel center 2 adjacent to the inner end cover 5.

[0026] An adjustment ring 11 is arranged between the tapered roller bearings 4 inside the wheel center 2 .

[0027] V-shaped sealing rings 12 and sealing stacks 13 are provided between the inner end cover 5 and the wheel center 2 and between the outer end cover 6 and the wheel center 2. The inner end cover 5 and the outer end cover 6 play the role of positioning and sealing the tapered roller bearing 4, and the sealing stack 13 and the V-shaped sealing ring 12 play the role of double sealing to prevent foreign matter from entering and affecting the rotation of the wheel.

[0028] An external hexagonal screw 14 for assembling the short shaft is inserted on the outer side of the outer end cover 6.

[0029] The outer ring surface of the wheel center 2 is provided with a C-shaped structure in which a vibration-damping rubber 7 can be embedded. The cross section of the vibration-damping rubber 7 is a horizontal U-shaped structure, eliminating the pressure ring structure of similar product solutions, thereby simplifying the structure and making the product lightweight, while improving product reliability.

[0030] The short shaft 1 of the running device is fixed at the bottom of the suspension frame of the maglev train. When the train fails and the suspension function disappears, the short shaft 1, inner end cover 5, outer end cover 6, V-shaped sealing ring 12 and adjustment ring 11 of the emergency running device are fixed, and the outer cylindrical surface of the wheel hub 3 directly contacts the track of the maglev train. The wheel hub 3, vibration-damping rubber 7, wheel center 2 and sealing stack ring 13 rotate around the short shaft 1 through the tapered roller bearing 4 to realize the emergency running of the vehicle.

[0031] The wheel center 2, the inner end cover 5 and the outer end cover 6 are all made of light alloy materials, which may be aluminum alloy, magnesium alloy or titanium alloy.

[0032] The inner end cover 5 and the outer end cover 6 have a lateral support cover 15 bent toward the wheel center 2 on their outer arc surfaces. The lateral support cover 15 is provided with an outer air inlet with a metal filter screen disposed inside.

[0033] like Figure 2~Figure 5 An assembly tool for an emergency running device shown includes a pad 16, a conical guide ring 17, and a support cylinder 18, and adopts the wheel center 2 and the vibration-damping rubber 7 described in any one of claims 1 to 7.

[0034] The diameter of the large end of the tapered guide ring 17 is the same as that of the wheel center 2 , and the diameter of the small end of the tapered guide ring 17 is equivalent to the size of the inner ring of the vibration-damping rubber 7 .

[0035] An assembly method of an emergency running device, the main assembly process is as follows: Place the support cylinder 18 horizontally on the press-fitting workbench, and place the assembly in which the vibration-damping rubber 7 has been embedded in the wheel hub 3 on the support cylinder 18; Lubricating oil is evenly applied to the outer annular surface of the tapered guide ring 17, the C-shaped outer annular surface of the wheel center 2, and the inner annular surface of the vibration damping rubber 7; Place the conical guide ring 17 horizontally inside the combination of the wheel hub 2 and the vibration damping rubber 7, and wait until the gravity of the conical guide ring 16 and the extrusion force of the vibration damping rubber 7 are balanced before proceeding to the subsequent steps; Place the wheel center 2 on the upper part of the conical guide ring 17, and then place the pad 16 on the upper part of the wheel center 2; Use a press to slowly press down the pad 16, so that the conical guide ring 17 slowly squeezes the vibration damping rubber 7 and presses it into the support cylinder 18; When the wheel center 2 follows the conical guide ring 17 to the position of the vibration-damping rubber 7, the vibration-damping rubber 7 expands and squeezes into the C-shaped outer ring surface of the wheel center 2, and then the conical guide ring 17 passes through the vibration-damping rubber 7 and falls into the support cylinder 18; After the pad 16 is pressed to contact the wheel hub 3, the pressure is unloaded, the pad 16 is removed, and the assembly of the wheel hub 3, the vibration-damping rubber 7 and the wheel center 2 is taken out, and the assembly of the vibration-damping rubber 7 is completed.

[0036] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A magnetic levitation vehicle emergency wheel running device, comprising a short shaft (1), a wheel center (2) and a wheel hub (3), wherein: The wheel center (2) is movably mounted on one end of the short shaft (1) via a tapered roller bearing (4); an inner end cover (5) is sleeved on the inner side of the wheel center (2) and located on the outer periphery of the short shaft (1); an outer end cover (6) is sleeved on the outer side of the wheel center (2); a vibration-damping rubber (7) is arranged between the wheel center (2) and the wheel hub (3); an internal flow guide channel (8) is provided inside the wheel center (2); an external flow guide port (9) connected to the internal flow guide channel (8) is provided on the outer side of the wheel center (2) near the outer end cover (6) and the vibration-damping rubber (7); and an internal flow guide port (10) connected to the internal flow guide channel (8) is provided on the inner side of the wheel center (2) near the inner end cover (5).

2. The emergency wheel running device of a magnetic levitation vehicle according to claim 1 is characterized in that: An adjustment ring (11) is provided between the tapered roller bearings (4) inside the wheel center (2).

3. The emergency wheel running device of a magnetic levitation vehicle according to claim 1 is characterized in that: A V-shaped sealing ring (12) and a sealing stack ring (13) are provided between the inner end cover (5) and the wheel center (2) and between the outer end cover (6) and the wheel center (2).

4. The emergency wheel running device of a magnetic levitation vehicle according to claim 1 is characterized in that: An external hexagonal screw (14) for assembling the short shaft (1) is inserted on the outside of the outer end cover (6).

5. The emergency wheel running device of a magnetic levitation vehicle according to claim 1 is characterized in that: The outer annular surface of the wheel center (2) is provided with a C-shaped structure in which a vibration-damping rubber (7) can be embedded. The cross section of the vibration-damping rubber (7) is a horizontally placed U-shaped structure.

6. The emergency wheel running device of a magnetic levitation vehicle according to claim 1 is characterized in that: The wheel center (2), the inner end cover (5) and the outer end cover (6) are all made of light alloy material.

7. The emergency wheel running device of a magnetic levitation vehicle according to claim 1 is characterized in that: The outer arcuate surfaces of the inner end cover (5) and the outer end cover (6) are provided with a lateral support cover (15) bent toward the wheel center (2), and the lateral support cover (15) is provided with an outer air inlet with a metal filter screen arranged inside.

8. An assembly tool for an emergency running device, comprising a pad (16), a conical guide ring (17), and a support cylinder (18), characterized in that: A wheel center (2) and a vibration-damping rubber (7) as claimed in any one of claims 1 to 7 are used.

9. The assembly tool for an emergency running device according to claim 8, characterized in that: The diameter of the large end of the conical guide ring (17) is the same as that of the wheel center (2), and the diameter of the small end of the conical guide ring (17) is equivalent to the size of the inner ring of the vibration damping rubber (7).

10. An assembly method of an emergency running device, characterized in that: The main assembly process is as follows: Place the support cylinder (18) horizontally on a press-fitting workbench, and place the assembly in which the vibration-damping rubber (7) is embedded in the wheel hub (3) on the support cylinder (18); Lubricating oil is evenly applied to the outer annular surface of the tapered guide ring (17), the C-shaped outer annular surface of the wheel center (2), and the inner annular surface of the vibration damping rubber (7); Place the conical guide ring (17) horizontally inside the assembly of the wheel hub (2) and the vibration damping rubber (7), and wait until the gravity of the conical guide ring (17) and the extrusion force of the vibration damping rubber (7) are balanced before proceeding to the subsequent steps; The wheel center (2) is placed on the upper part of the conical guide ring (17), and the backing plate (16) is placed on the upper part of the wheel center (2); Use a press to slowly press down the pad (16) so that the conical guide ring (17) slowly squeezes the vibration damping rubber (7) and presses it into the support cylinder (18); When the wheel center (2) follows the conical guide ring (17) to the position of the vibration-damping rubber (7), the vibration-damping rubber (7) expands and squeezes into the C-shaped outer ring surface of the wheel center (2), and then the conical guide ring (17) passes through the vibration-damping rubber (7) and falls into the support cylinder (18); After the pad (16) is pressed until it contacts the wheel hub (2), the pressure is unloaded, the pad (16) is removed, and the assembly of the wheel hub (2), the vibration-damping rubber (7) and the wheel center (2) is taken out, and the assembly of the vibration-damping rubber (7) is completed.

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