A support wheel device for a medium and low speed maglev train

Abstract

The present invention provides a support wheel device for a medium and low speed maglev train, which relates to the technical field of maglev trains and includes a seat body, a base and a limiting wheel seat connected in sequence from top to bottom through a support frame. A stepped hole is provided inside the seat body, and an oil cylinder assembly is arranged in the stepped hole. The upper part of the oil cylinder assembly extends out of the upper surface of the seat body. The limiting device is connected to the limiting groove after passing through the limiting hole. A long screw for adjusting the height of the support wheel is arranged at the lower part of the support frame. An inner hole for connecting with the support frame is provided on the base. A positioning block is arranged on the upper surface of the limiting wheel seat, and the positioning block is adapted to the positioning groove on the support frame. The limiting wheel seat is connected with the support wheel through a wheel shaft. The support wheel device for a medium and low speed maglev train provided by the present invention is used for the support and operation when the train suspension fails, effectively solves the problem of vertical skid wear, and reduces the operation cost of the train.

Description

Technical Field

[0001] The present invention relates to the technical field of maglev trains, and particularly to a support wheel device for medium and low speed maglev trains. Background Art

[0002] Medium and low speed maglev trains have the advantages of small turning radius, strong climbing ability, low running noise, etc.; and the conventional short stator maglev train, with its advantages of low energy consumption, strong line adaptability and low line cost, is gradually becoming a competitive new type of public transportation within the city. Medium and low speed maglev trains enrich the diversity of rail transit and form a more reasonable urban rail transit system with railways, light rails, subways, etc.

[0003] A support wheel device is provided on the medium and low speed maglev train. When most of the suspension control points of the train fail to lose suspension force or other reasons cause the train to be unable to suspend, the support wheel device serves as an emergency measure to support the vehicle to move back to the predetermined parking point. The support device should have the basic characteristics of wear resistance, impact resistance and corrosion resistance.

[0004] The existing support wheel device includes a seat body and two sets of telescopic parking rescue wheels. Such a design results in a complex structure, large mass and large volume. Four sets of support wheel devices are provided on each suspension bracket, occupying the layout space of the under-vehicle equipment; the diameter of the support wheel is relatively small, and when encountering a large gap in the track or turnout during operation, the support wheel may get stuck; since the vehicle loses suspension force and also loses the guiding force, there is a risk that the support wheel may fall off the track when passing through a curve. In addition, the telescopic parking rescue wheel cylinder is a one-way cylinder. The support wheel descends by injecting oil into the hydraulic system, and the support wheel retracts by the weight of the vehicle itself, which cannot ensure that it retracts in place; and there is no limit mechanism, resulting in the support wheel often colliding with the track due to the vibration and impact of the suspension bracket during the operation of the vehicle; it also causes the support wheel device to be unable to be used normally under the conditions of power failure and pressure relief of the vehicle. Summary of the Invention

[0005] The present invention provides a support wheel device for medium and low speed maglev trains, which solves the problem that the existing support wheel device often causes the support wheel to collide with the track due to the vibration and impact of the suspension bracket during the operation of the vehicle.

[0006] To achieve the above purposes, the technical solution adopted by the present invention is:

[0007] A support wheel device for a medium and low speed maglev train, comprising a seat body, a base and a limiting wheel seat which are sequentially connected from top to bottom through a support frame. A stepped hole that decreases from bottom to top is arranged inside the seat body. An oil cylinder assembly is arranged in the stepped hole. The upper part of the oil cylinder assembly extends out of the upper surface of the seat body. A downward oil injection hole is arranged at the top of the oil cylinder assembly. The piston rod of the oil cylinder assembly is connected to the support frame. An installation hole is arranged on the side of the seat body. The recovery oil injection hole is connected to the oil cylinder assembly after passing through the installation hole. A limiting groove is arranged at the upper part of the support frame. A limiting hole is arranged on the side of the seat body. The limiting device is connected to the limiting groove after passing through the limiting hole. A long screw rod for adjusting the height of the support wheel is arranged at the lower part of the support frame. An inner hole for connecting to the support frame is arranged on the base. A positioning block is arranged on the upper surface of the limiting wheel seat. The positioning block is adapted to the positioning groove on the support frame. The limiting wheel seat is connected to the support wheel through a wheel axle.

[0008] Further, the oil cylinder of the oil cylinder assembly is a two-way oil cylinder.

[0009] Further, when the vehicle is running normally or the suspension fails, the limiting device is a limiting pin; when the vehicle is uncoupled and reconnected, the limiting device is a limiting block.

[0010] Further, the horizontal groove at the lower part of the oil cylinder assembly is connected to the horizontal boss of the support frame.

[0011] Further, a retaining ring is arranged between the support frame and the limiting wheel seat, and the support frame and the retaining ring are connected in a hemispherical surface form.

[0012] Further, a bearing is arranged inside the support wheel.

[0013] Further, the support wheel has a large wheel diameter, and a wheel rim is arranged on the support wheel.

[0014] Further, the oil cylinder assembly includes an oil cylinder, a piston rod, a sealing ring and an oil cylinder cover.

[0015] The beneficial effects of the present invention are as follows:

[0016] The support wheel device provided by the present invention is used for the support and operation when the suspension of the train fails; after the support wheel device drops, the vehicle is supported by the support wheel, and the vertical skid no longer contacts the track, effectively solving the problem of wear of the vertical skid and reducing the operation cost of the train.

[0017] For the support wheel device provided by the present invention, each set of support wheel devices only uses one oil cylinder to support two support wheels. At the same time, the size of the seat body is reduced, and together with the design of weight reduction holes and grooves, the system weight is greatly reduced, saving the production cost.

[0018] The present invention is provided with a two-way oil cylinder, which enables the supporting wheels to be quickly retracted and can prevent the supporting wheels from colliding with the track due to vibration during the operation of the vehicle.

[0019] The present invention is provided with a locking mechanism to ensure that the vehicle can still run relying on the supporting wheels under the condition of power failure and pressure relief of the vehicle.

[0020] The diameter of the supporting wheels provided by the present invention is larger than the track clearance at the turnout, which can be applicable to various tracks and turnout clearances; a flange is additionally provided on the supporting wheels to prevent the supporting wheels from falling off the track. Brief Description of the Drawings

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic three-dimensional structure diagram of the device of the present invention.

[0023] Figure 2 It is a sectional view of the device of the present invention.

[0024] Figure 3 It is a schematic diagram of the limit pin of the present invention.

[0025] Figure 4 It is a schematic diagram of the limit block of the present invention.

[0026] Explanation of the Reference Numerals in the Drawings:

[0027] 1. Support frame; 2. Seat body; 3. Base; 4. Limit wheel seat; 5. Oil cylinder assembly; 6. Lower oil injection hole; 7. Retraction oil injection hole; 8. Supporting wheel; 9. Positioning block; 10. Wheel shaft; 11. Limit pin; 12. Limit block; 13. Retaining ring; 14. Bearing. Detailed Embodiment

[0028] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail the present invention.

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. The description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangements, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be understood that the orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. generally indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present invention: the orientation terms "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0033] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made.

[0034] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0035] The present invention provides a technical solution: a support wheel device for a medium and low speed maglev train, such as Figures 1-4As shown in the figure, it includes a seat body 2, a base 3, and a limiting wheel seat 4 that are sequentially connected from top to bottom through a support frame 1. A stepped hole is provided inside the seat body 2, and the diameter of the stepped hole is larger at the bottom and smaller at the top. The oil cylinder assembly 5 is installed from bottom to top, and the step plays a role of limiting and stopping. An oil cylinder assembly 5 is provided in the stepped hole, and the oil cylinder of the oil cylinder assembly 5 is a two-way oil cylinder. The upper part of the oil cylinder assembly 5 extends out of the upper surface of the seat body 2. A downward oil injection hole 6 is provided at the top of the oil cylinder assembly 5. The piston rod of the oil cylinder assembly 5 is connected to the support frame 1. An installation hole is provided on the side of the seat body 2. The retraction oil injection hole 7 passes through the installation hole and is connected to the oil cylinder assembly 5. The horizontal groove at the lower part of the oil cylinder assembly 5 is connected to the horizontal boss of the support frame 1. A limiting groove is provided at the upper part of the support frame 1, and a limiting hole is provided on the side of the seat body 2. The limiting device passes through the limiting hole and is connected to the limiting groove. When the vehicle is running normally, the limiting device is a limiting pin 11; when the support wheel 8 is in the lowered state, the limiting device is a limiting block 12. A long screw rod for adjusting the height of the support wheel 8 is provided at the lower part of the support frame 1. An inner hole for connecting to the support frame 1 is provided on the base 3. A positioning block 9 is provided on the upper surface of the limiting wheel seat 4, and the positioning block 9 is adapted to the positioning groove on the support frame 1. The limiting wheel seat 4 is connected to the support wheel 8 through a wheel shaft 10. The support wheel 8 has a large wheel diameter, and a wheel rim is provided on the support wheel 8. A bearing 14 is provided inside the support wheel 8. A retaining ring 13 is provided between the support frame 1 and the limiting wheel seat 4, and the support frame 1 and the retaining ring 13 are connected in a hemispherical surface form.

[0036] In the prior art, the diameter of the support wheel is 60 mm. When passing through a turnout track with an excessive gap, the support wheel will get stuck in the gap, affecting the use. In the present invention, the diameter of the support wheel 8 is 90 mm, which can effectively avoid the above situation.

[0037] Here, it refers to a larger wheel diameter compared to the existing solution, and also refers to a larger diameter compared to the track gap at the turnout, so that the support wheel will not get stuck in the gap.

[0038] The two-way oil cylinder assembly is placed inside the seat body 2. The piston rod of the oil cylinder is connected to the support frame 1. By hydraulic control, oil is injected into the downward and retraction oil injection holes to realize the lowering and retraction of the support wheel. The limiting wheel seat 4 and the retaining ring 13 are connected to the support frame 1 through bolts, and the retaining ring 13 and the support frame 1 are connected in a hemispherical surface form to realize the multi-degree-of-freedom design of the support wheel. Two positioning blocks 9 are provided at the front and rear of the limiting wheel seat 4 to realize the limiting function of the support wheel 8. Two support wheels 8 with internal bearings 14 are connected to the limiting wheel seat 4 through a wheel shaft 10 and fixed with nuts.

[0039] A stepped hole is provided inside the seat body 2. The oil cylinder assembly 5 is inserted into the seat body 2 from bottom to top, and its height position is restricted by the step of the oil cylinder assembly 5 and the stepped platform inside the seat body 2. The base 3 is provided with an inner hole and is connected to the support frame 1. The horizontal groove at the lower part of the oil cylinder assembly 5 is connected to the horizontal boss of the support frame 1. The base 3 and the seat body 2 are fastened by bolts. The retracted oil injection hole 7 is installed on the oil cylinder assembly 5 through the installation hole provided on the side of the seat body 2.

[0040] A limit groove is provided at the upper part of the support frame 1. Through the cooperation of the limit pin 11, the rotation of the support frame 1 is prevented and the descending height of the support wheel 8 is restricted. In addition, when the support wheel 8 is in the descending state, the limit pin 11 is replaced by a limit block 12, which can restrict the retraction of the support wheel 8, realizing the normal use of the support wheel device under the condition of power-off and pressure relief of the vehicle.

[0041] The limit wheel seat 4, the support frame 1 and the retaining ring 13 are connected by nuts. A long screw rod is provided at the lower part of the support frame 1 for the height adjustment of the support wheel 8. The retaining ring 13 and the support frame 1 are connected in a hemispherical form, allowing relative rotation between the limit wheel seat 4 and the support frame 1. At the same time, two positioning blocks 9 are provided at the front and rear of the limit wheel seat 4 to limit the excessive rotation between the limit wheel seat 4 and the support frame 1. When the support wheel 8 runs, it can adjust its own shape according to different line conditions, improving the applicability of the support wheel device.

[0042] A bearing 14 is provided inside the support wheel 8. The support wheel 8 is connected to the limit wheel seat 4 through a wheel shaft 10 and is fixed by a nut.

[0043] The limit pin 11 plays a guiding role during the lifting and lowering process of the support wheel 8, restricts the rotation of the support frame 1 relative to the seat body 3, and ensures that the direction of the support frame 1 is consistent with the forward direction of the vehicle. At the same time, it also plays a limiting role. When the limit pin 11 contacts the lower edge of the long strip hole of the seat body, the support wheel 8 stops descending.

[0044] The limit block 12 is to ensure that the support wheel 8 remains in the falling position under the condition of power-off and pressure relief of the vehicle, and is generally used for working conditions such as vehicle uncoupling and reconnecting.

[0045] During the train operation, when suspension failure occurs, the driver controls the hydraulic system to inject oil through the descending oil injection hole 6. The piston rod at the lower end of the oil cylinder assembly 5 extends, driving the support frame 1, the wheel seat 4, and the support wheel 8 to descend. The limit pin 11 ensures that the support frame 1 does not rotate during the descending process. When the limit pin 11 contacts the lower end of the long strip hole of the seat body 2, the support wheel stops descending. The positioning block 9 ensures that the wheel seat 4 and the support wheel 8 do not rotate during the descending process.

[0046] When the train needs to be uncoupled, first lower the support wheels through the control of the driver on the vehicle (the same as above), then replace the limit pin 11 with the limit block 12, and finally cut off the power supply of the vehicle. It realizes the normal use of the support wheel device under the condition of power-off and pressure relief of the vehicle, and ensures that each vehicle can still be towed on the track by relying on the support wheels after the vehicle is uncoupled.

[0047] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A supporting wheel device for a medium and low speed maglev train, characterized in that: It includes a seat body (2), a base (3) and a limiting wheel seat (4) connected in sequence from top to bottom through a support frame (1). A stepped hole that decreases sequentially from bottom to top is arranged inside the seat body (2). An oil cylinder assembly (5) is arranged in the stepped hole. The upper part of the oil cylinder assembly (5) extends out of the upper surface of the seat body (2). A downward oil injection hole (6) is arranged at the top of the oil cylinder assembly (5). The piston rod of the oil cylinder assembly (5) is connected to the support frame (1). An installation hole is arranged on the side of the seat body (2). A retracting oil injection hole (7) is connected to the oil cylinder assembly (5) after passing through the installation hole. A limiting groove is arranged at the upper part of the support frame (1). A limiting hole is arranged on the side of the seat body (2). A limiting device is connected to the limiting groove after passing through the limiting hole. A long screw rod for adjusting the height of a support wheel (8) is arranged at the lower part of the support frame (1). An inner hole for connecting to the support frame (1) is arranged on the base (3). A positioning block (9) is arranged on the upper surface of the limiting wheel seat (4). The positioning block (9) is adapted to a positioning groove on the support frame (1). The limiting wheel seat (4) is connected to the support wheel (8) through a wheel shaft (10); When the vehicle is running normally or the suspension fails, the limiting device is a limiting pin (11); when the vehicle is uncoupled and reconnected, the limiting device is a limiting block (12); A bearing (14) is arranged inside the support wheel (8); The oil cylinder assembly (5) includes an oil cylinder, a piston rod, a sealing ring and an oil cylinder cover.

2. The support wheel device for medium and low speed maglev trains according to claim 1, wherein: The oil cylinder of the oil cylinder assembly (5) is a two-way oil cylinder.

3. The supporting wheel device for medium and low speed maglev trains according to claim 1, wherein: The transverse groove at the lower part of the oil cylinder assembly (5) is connected to the transverse boss of the support frame (1).

4. The support wheel device for medium and low speed maglev train according to claim 1, characterized in that: A retaining ring (13) is arranged between the support frame (1) and the limiting wheel seat (4). The support frame (1) and the retaining ring (13) are connected in a hemispherical surface form.

5. The support wheel device for medium and low speed maglev train according to claim 1, wherein: The wheel diameter size of the support wheel (8) is larger than the track gap at the turnout. A wheel flange is arranged on the support wheel (8).

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