Conversion method for tire walking and rail walking of tunnel vehicle

文档序号:1528900 发布日期:2020-02-14 浏览:32次 中文

阅读说明:本技术 隧道车辆轮胎行走和轨道行走的转换方法 (Conversion method for tire walking and rail walking of tunnel vehicle ) 是由 张尚尉 刘继平 刘中玲 孙连佳 董平华 张雄超 孙华平 蔡苠升 尹桂芳 胡兰霞 于 2019-11-05 设计创作,主要内容包括:一种隧道车辆轮胎行走和轨道行走的转换方法,涉及车辆技术领域。该隧道车辆轮胎行走和轨道行走的转换方法包括以下步骤:控制轮轨行走机构顶升整车,控制轮胎行走机构的轮胎转动,控制轮胎行走机构沿车辆的宽度方向升缩向靠近隧道内壁方向移动,使轮胎的外周面抵压隧道的内壁,控制轮轨行走机构回收并使轨轮脱离对应的轨道;或控制轮轨行走机构下降并使轨轮抵压对应的轨道使得轮胎行走机构不受力,控制轮胎行走机构沿车辆的宽度方向向脱离隧道内壁方向移动,控制轮轨行走机构的轮轨转动。本申请提供的隧道车辆轮胎行走和轨道行走的转换方法能够使车辆在隧道内轮胎行走和轨道行走之间转换,从而适应隧道内不同行走工况的作业和施工需求。(A method for converting tire walking and rail walking of tunnel vehicles relates to the technical field of vehicles. The conversion method of the tire walking and the rail walking of the tunnel vehicle comprises the following steps: controlling the wheel-rail travelling mechanism to lift the whole vehicle, controlling the tire of the tire travelling mechanism to rotate, controlling the tire travelling mechanism to move towards the direction close to the inner wall of the tunnel along the width direction of the vehicle in a lifting and contracting manner, enabling the outer peripheral surface of the tire to be pressed against the inner wall of the tunnel, and controlling the wheel-rail travelling mechanism to recover and enable the rail wheels to be separated from the corresponding tracks; or the wheel-rail travelling mechanism is controlled to descend and the rail wheels are pressed against the corresponding rails, so that the tire travelling mechanism is not stressed, the tire travelling mechanism is controlled to move towards the direction of separating from the inner wall of the tunnel along the width direction of the vehicle, and the wheel rail of the wheel-rail travelling mechanism is controlled to rotate. The method for converting the tire walking and the rail walking of the tunnel vehicle can convert the vehicle between the tire walking and the rail walking in the tunnel, so that the method is suitable for operation and construction requirements of different walking working conditions in the tunnel.)

1. A method for converting tire running and rail running of a tunnel vehicle is characterized in that the vehicle comprises at least two wheel-rail running mechanisms capable of ascending and descending and at least four tire running mechanisms capable of moving along the width direction of the vehicle, the at least four tire running mechanisms are symmetrically arranged on two sides of the vehicle, each wheel-rail running mechanism comprises at least two rotatable rail wheels, each tire running mechanism comprises at least one rotatable tire, and each tire is configured to rotate so that the axis of the tire rotates up and down relative to a horizontal plane; the conversion method comprises the following steps:

controlling the wheel-rail travelling mechanism to descend and enable the rail wheels to abut against the corresponding rails so that the tire travelling mechanism is not stressed, controlling the tires of the tire travelling mechanism to rotate, controlling the tire travelling mechanism to move towards the direction close to the inner wall of the tunnel along the width direction of the vehicle, enabling the outer peripheral surface of each tire to abut against the inner wall of the tunnel, controlling the wheel-rail travelling mechanism to ascend and enabling the rail wheels to be separated from the corresponding rails, and achieving travelling in a tire mode;

or the wheel-rail travelling mechanism is controlled to descend, the rail wheels are enabled to abut against the corresponding rails, so that the tire travelling mechanism is not stressed, the tire travelling mechanism is controlled to move towards the direction far away from the inner wall of the tunnel along the width direction of the vehicle, the wheel rails of the wheel-rail travelling mechanism are controlled to rotate, and the wheel-rail travelling mechanism is controlled to travel in a wheel-rail mode.

2. The method of claim 1, wherein the wheel-track traveling mechanism is configured to be movable in a width direction of the vehicle; and controlling the wheel-rail travelling mechanism to move along the width direction of the vehicle before controlling the wheel-rail travelling mechanism to descend and enabling the rail wheels to abut against the corresponding rails, so that the rail wheels move to the positions above the corresponding rails.

3. The method of claim 1, wherein the tire travel mechanism is configured to be elevationally coupled to the vehicle; and controlling the tire of the tire travelling mechanism to rotate, and controlling the tire travelling mechanism to lift to move the tire to a preset position in the tunnel before the outer peripheral surface of the tire is pressed against or separated from the inner wall of the tunnel.

4. The method for converting between tire travel and rail travel of a tunnel vehicle of claim 1, wherein said tire is configured to be vertically rotatably connected to said tire travel mechanism; and before the wheel-rail travelling mechanism is controlled to descend and the rail wheels are pressed against the corresponding rails, the tires are controlled to rotate in the vertical direction and drive the vehicles to move, so that the rail wheels move to the positions above the corresponding rails.

5. The method for converting between tire travel and rail travel of a tunnel vehicle of claim 1, wherein the rail wheels are coupled to at least one bearing housing by a rail wheel axle, the bearing housing being coupled to the wheel and rail travel mechanism by at least two vibration reduction devices.

Technical Field

The application relates to the technical field of vehicles, in particular to a method for converting tire walking and rail walking of a tunnel vehicle.

Background

With the rapid development of urban infrastructure construction, urban subway rail transit has also achieved tremendous development. Construction space is narrow and small in the tunnel owing to the restriction of shield size among the city subway construction process, and ordinary engineering equipment is difficult to be suitable for, and the part of laying the track in subway construction process can use rail vehicle to carry out goods and materials and carry, but the part of not laying the track is difficult to use ordinary vehicle to carry out goods and materials and carries.

Therefore, a method capable of switching between the tire running and the rail running of the tunnel tube wall is required to improve the efficiency of the transportation of construction materials of tunnel vehicles.

Disclosure of Invention

The application aims to provide a method for converting tire walking and rail walking of a tunnel vehicle, which can convert the tire walking and the rail walking of the vehicle in the tunnel so as to adapt to different walking operations and construction requirements in the tunnel.

The embodiment of the application is realized as follows:

the embodiment of the application provides a conversion method of tunnel vehicle tire walking and rail walking, the vehicle comprises at least two liftable wheel-rail walking mechanisms and at least four tire walking mechanisms capable of moving along the width direction of the vehicle, the at least four tire walking mechanisms are symmetrically arranged on two sides of the vehicle, the wheel-rail walking mechanisms comprise at least two rotatable rail wheels, the tire walking mechanisms comprise at least one rotatable tire, and the tire is configured to be rotatable so that the axis of the tire rotates up and down relative to a horizontal plane; the conversion method comprises the following steps:

controlling the wheel-rail travelling mechanism to descend and enable the rail wheels to abut against the corresponding rails so that the tire travelling mechanism is not stressed, controlling the tires of the tire travelling mechanism to rotate, controlling the tire travelling mechanism to move towards the direction close to the inner wall of the tunnel along the width direction of the vehicle, enabling the outer peripheral surfaces of the tires to abut against the inner wall of the tunnel, controlling the wheel-rail travelling mechanism to ascend and enabling the rail wheels to be separated from the corresponding rails, and realizing the travelling of the tires in a tire mode;

or the wheel-rail travelling mechanism is controlled to descend and the rail wheels are pressed against the corresponding rails, so that the tire travelling mechanism is not stressed, the tire travelling mechanism is controlled to move towards the direction far away from the inner wall of the tunnel along the width direction of the vehicle, the wheel rail of the wheel-rail travelling mechanism is controlled to rotate, and the wheel-rail travelling mechanism travels in a wheel-rail mode.

In some alternative embodiments, the wheel-rail traveling mechanism is configured to be movable in the width direction of the vehicle; and before the wheel-rail travelling mechanism is controlled to descend and the rail wheels are pressed against the corresponding rails, the wheel-rail travelling mechanism is controlled to move along the width direction of the vehicle, so that the rail wheels move to the upper parts of the corresponding rails.

In some alternative embodiments, the tire chassis is configured to be liftably connected to a vehicle; and controlling the tire of the tire travelling mechanism to rotate, and controlling the tire travelling mechanism to lift to move the tire to a preset position in the tunnel before the outer peripheral surface of the tire is pressed against or separated from the inner wall of the tunnel.

In some alternative embodiments, the tire is configured to be vertically rotatably connected to a tire running mechanism; and controlling the wheel-rail travelling mechanism to descend and controlling the tires to rotate in the vertical direction and driving the vehicle to move before the rail wheels are pressed against the corresponding rails, so that the rail wheels move to the upper parts of the corresponding rails.

In some alternative embodiments, the rail wheel is connected to at least one bearing housing by means of a rail wheel axle, and the bearing housing is connected to the wheel-rail running gear by means of at least two vibration dampers.

The beneficial effect of this application is: the method for converting the tire walking and the rail walking of the tunnel vehicle comprises the following steps: controlling the wheel-rail travelling mechanism to descend and enable the rail wheels to abut against the corresponding rails so that the tire travelling mechanism is not stressed, controlling the tires of the tire travelling mechanism to rotate, controlling the tire travelling mechanism to move towards the direction close to the inner wall of the tunnel along the width direction of the vehicle, enabling the outer peripheral surfaces of the tires to abut against the inner wall of the tunnel, controlling the wheel-rail travelling mechanism to ascend and enabling the rail wheels to be separated from the corresponding rails, and realizing the travelling of the tires in a tire mode; or the wheel-rail travelling mechanism is controlled to descend and the rail wheels are pressed against the corresponding rails, so that the tire travelling mechanism is not stressed, the tire travelling mechanism is controlled to move towards the direction far away from the inner wall of the tunnel along the width direction of the vehicle, the wheel rail of the wheel-rail travelling mechanism is controlled to rotate, and the wheel-rail travelling mechanism travels in a wheel-rail mode. The method for converting the tire walking and the rail walking of the tunnel vehicle can convert the vehicle between the tire walking and the rail walking in the tunnel, so that different walking operations and construction requirements in the tunnel are met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural diagram of a tunnel tire wheel-rail interchange vehicle provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a tunnel tire wheel-rail interchange vehicle provided by an embodiment of the application when the tunnel tire wheel-rail interchange vehicle is converted to an intermediate state for simultaneously maintaining tire running and rail running;

FIG. 3 is a schematic structural diagram of a tunnel tire and wheel rail interchange type vehicle provided by an embodiment of the application when the vehicle is converted to tire running;

FIG. 4 is a schematic structural diagram of a tunnel tire wheel-rail interchange vehicle provided by an embodiment of the present application when the vehicle is converted to track running;

FIG. 5 is a schematic structural diagram of a wheel-rail traveling frame and a shock-absorbing buffer device in a tunnel tire wheel-rail interchange vehicle according to an embodiment of the present application;

FIG. 6 is a cross-sectional view from a first perspective of a tire travel mechanism and a tire span changing mechanism in a tunnel tire and wheel track interchange vehicle as provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a second view angle of a tire running mechanism and a tire span changing mechanism in a tunnel tire and wheel rail interchange type vehicle provided by an embodiment of the application.

In the figure: 100. a frame; 200. a wheel-rail traveling mechanism; 210. a rail wheel; 211. a rail axle; 220. a wheel-rail walking frame; 230. a hydraulic motor; 240. a bearing housing; 250. a rubber spring; 300. a switching mechanism; 310. the upright post is sleeved; 320. an upright post inner sleeve; 330. a column cylinder; 340. transversely moving the outer sleeve; 350. transversely moving the inner sleeve; 360. transversely moving the oil cylinder; 400. a tire travel mechanism; 410. a tire; 420. a bogie; 430. a rotating shaft; 440. a swing bridge; 450. a bolt; 460. a steering pin shaft; 470. a slewing bearing; 480. a steering cylinder; 490. equalizing the free bearing; 491. balancing the pin shafts; 492. equalizing the beam; 500. a tire span varying mechanism; 510. a span-variable inner sleeve; 520. a variable-span coat; 530. and a span-variable oil cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The features and properties of the present application are described in further detail below with reference to examples.

As shown in FIG. 1, the method for switching between tire walking and rail walking of a tunnel vehicle provided by the embodiment of the application is mainly used for walking and working on the inner pipe wall and the rail in a tunnel, so that the vehicle can be switched between tire walking and rail walking on the pipe wall of the tunnel. The conversion method of the tunnel vehicle tire traveling and the rail traveling is based on a tunnel tire wheel-rail interchange type vehicle.

The tunnel tire wheel-rail interchange vehicle comprises a vehicle frame 100, wherein two wheel-rail traveling mechanisms 200 are connected below the vehicle frame 100, each wheel-rail traveling mechanism 200 is connected with a transverse movement positioning mechanism for driving the wheel-rail traveling mechanisms 200 to move along the width direction of the vehicle frame 100 and an interchange mechanism 300 for driving the wheel-rail traveling mechanisms 200 to ascend and descend, and the vehicle frame 100 is further connected with four tire traveling mechanisms 400 symmetrically arranged on two sides of the vehicle frame 100 and a tire span changing mechanism 500 for driving the four tire traveling mechanisms 400 to move along the width direction of the vehicle frame 100.

As shown in fig. 2, 5, 6 and 7, the traverse positioning mechanism comprises a traverse outer sleeve 340 connected with the frame 100, a traverse inner sleeve 350 sliding through the traverse outer sleeve 340, and a traverse cylinder 360, wherein the traverse outer sleeve 340 is horizontally arranged and arranged along the width direction of the frame 100, and a cylinder body and a cylinder rod of the traverse cylinder 360 are respectively hinged with the traverse outer sleeve 340 and the traverse inner sleeve 350; the exchange mechanism 300 comprises upright column outer sleeves 310 respectively connected with two ends of a traverse outer sleeve 340, the two upright column outer sleeves 310 are parallel and vertically arranged, each upright column outer sleeve 310 is connected with an upright column inner sleeve 320 which penetrates through the upright column outer sleeve in a sliding manner, the top of the outer wall of each upright column outer sleeve 310 is hinged with a cylinder body of an upright column oil cylinder 330, and a liftable wheel-rail travelling mechanism 200 is arranged below the traverse outer sleeve 340; the wheel-track traveling mechanism 200 comprises a wheel-track traveling frame 220, two ends of which are respectively hinged with two upright post inner sleeves 320, oil cylinder rods of two upright post oil cylinders 330 are respectively hinged with two ends of the wheel-track traveling frame 220, two ends of the wheel-track traveling frame 220 are respectively connected with a damping buffer device, a rotatable rail wheel 210 and a hydraulic motor 230 for driving the rail wheel 210 to rotate, each damping buffer device comprises two bearing boxes 240, a rail wheel shaft 211, two ends of which are respectively connected with the two bearing boxes 240 in a rotatable manner, and two rubber springs 250 corresponding to each bearing box 240, two ends of each rubber spring 250 are respectively connected with the wheel-track traveling frame 220 and the corresponding bearing box 240, the rail wheel 210 is sleeved on the corresponding rail wheel shaft 211, and an output shaft of the hydraulic motor 230 is coaxially connected with the corresponding rail wheel shaft 211; the tire span-changing mechanism 500 comprises two span-changing outer sleeves 520 symmetrically arranged on two sides of the frame 100, the span-changing outer sleeves 520 are horizontally arranged and arranged along the width direction of the frame 100, each span-changing outer sleeve 520 is connected with a span-changing inner sleeve 510 which is inserted into the span-changing outer sleeve in a sliding manner, a span-changing oil cylinder 530 is further arranged between each span-changing outer sleeve 520 and the corresponding span-changing inner sleeve 510, and a cylinder body and an oil cylinder rod of each span-changing oil cylinder 530 are respectively hinged with the corresponding span-changing inner sleeve 510 and the span-changing outer sleeve 520; each tire travelling mechanism 400 comprises a tire balancing mechanism connected with the corresponding variable span inner sleeve 510, two tire steering mechanisms connected with the tire balancing mechanism, and two bogies 420 connected with the tire steering mechanisms in a one-to-one correspondence manner, each bogie 420 is connected with a rotatable rotating shaft 430, the axis of the rotating shaft 430 extends along the length direction of the frame 100, each rotating shaft 430 is connected with a swing bridge 440, each swing bridge 440 is connected with a tire 410 through a half bridge, the swing bridge 440 is further connected with three bolts 450 capable of moving along the axial direction, the bolts 450 move along the axial direction to lock or unlock the position between the corresponding bogie 420 and the swing bridge 440, and the tire 410 can rotate around the axis of the rotating shaft 430 to enable the axis of the tire 410 to rotate up and down relative to the horizontal plane; the tire balancing mechanism comprises a balancing hinged support 490 connected with the variable-span inner sleeve 510, a balancing pin 491 rotatably connected with the balancing hinged support 490, and a balancing beam 492 connected with the balancing pin 491, the balancing pin 491 is arranged along the horizontal direction, the axis of the balancing pin 491 extends along the width direction of the frame 100, the tire steering mechanism comprises a steering pin 460 vertically arranged and rotatably connected with the balancing beam 492, and a slewing bearing 470 connected with the steering pin 460, the slewing bearing 470 is connected with the bogie 420, the axis of the steering pin 460 is arranged along the vertical direction, the balancing beam 492 is further connected with a steering cylinder 480 for driving the two slewing bearings 470 to rotate around the corresponding steering pin 460, the steering cylinder 480 is a bidirectional cylinder, two ends of a cylinder rod of the steering cylinder 480 are hinged with the two slewing bearings 470, and the cylinder body of the steering cylinder 480 is connected with the balancing beam 492.

The conversion method of the tire walking and the rail walking of the tunnel vehicle comprises the following steps:

as shown in fig. 2 and 4, when the tire running is converted into the rail running, the wheel-rail running mechanism 200 is controlled to descend and the rail wheel 210 is pressed against the corresponding rail, so that the outer circumferential surface of the tire 410 is separated from the inner wall of the tunnel, the tire running mechanism 400 is controlled to move along the width direction of the vehicle and the direction away from the inner wall of the tunnel, and the tire 410 of the tire running mechanism 400 is controlled to rotate; specifically, the two upright post cylinders 330 are controlled to respectively drive the cylinder rods to extend out, so as to drive the wheel rail traveling frame 220 to stably descend, so that the rail wheels 210 connected with the damping and buffering devices at the two ends of the wheel rail traveling frame 220 are driven to descend above the track, at the moment, an operator can utilize the traverse positioning mechanism to align the two rail wheels 210 with the track up and down, namely, the cylinder rods of the traverse cylinders 360 are controlled to extend out, the traverse inner sleeve 350 is driven to move along the width direction of the traverse outer sleeve 340 and the frame 100, so as to drive the upright post cylinders 330 and the wheel rail traveling frame 220 connected with the traverse inner sleeve 350 to move along the width direction of the frame 100, so as to align the two rail wheels 210 with the track, finally, the two upright post cylinders 330 further drive the wheel rail traveling frame 220 and the two rail wheels 210 to descend onto the track, and finally, the cylinder rods of the span-changing cylinders 530 are controlled to contract, so as to drive the two span-changing inner sleeves 510 to move relative, the tire 410 of the tire running mechanism 400 is moved away from the tunnel inner wall in the width direction of the vehicle. Namely, two hydraulic motors 230 can be used to drive the corresponding rail wheels 210 to rotate so as to drive the tunnel tire wheel-rail interchange vehicle to move along the rail;

when the wheel-rail travelling mechanism 200 is controlled to descend and the rail wheels 210 are pressed against the corresponding rails, the oil cylinder rod of the steering oil cylinder 480 can be controlled to move to drive the two slewing bearings 470 to rotate around the corresponding steering pin shafts 460 respectively, so that the slewing bearings 470, the bogie 420 and the tires 410 connected with the steering pin shafts 460 are driven to rotate in the vertical direction, the two tires 410 in each tire travelling mechanism 400 are adjusted to rotate in the vertical direction synchronously to steer, and then the vehicle frame 100 is controlled to move to adjust the relative position of the middle axial direction of the vehicle frame 100 and the rails below the vehicle frame 100, so that the rail wheels 210 connected with the vehicle frame 100 move to the upper parts of the corresponding rails.

As shown in fig. 2 and 3, when the track running is converted into the tire running, firstly, the tire span varying mechanism 500 is used to drive each tire running mechanism 400 to move along the width direction of the frame 100 and the direction close to the inner wall of the tunnel, then the tires 410 of the tire running mechanisms 400 are controlled to rotate, the axes of each tire 410 are rotated relative to the horizontal plane until the outer peripheral surfaces of the tires 410 are approximately parallel to the preset position in the tunnel, the wheel-rail running mechanism 200 is controlled to ascend, each tire 410 is pressed against the inner wall of the tunnel, and the wheel-rail running mechanism 200 is controlled to ascend, and the rail wheels 210 are separated from the corresponding track; specifically, the oil cylinder rods of the two span-changing oil cylinders 530 are controlled to extend out, the two span-changing inner sleeves 510 are driven to move along the direction away from the vehicle frame 100 relative to the two span-changing outer sleeves 520, so as to drive the two bogies 420 connected with the two span-changing inner sleeves 510 to move towards the direction away from the vehicle frame 100, then the bolt 450 is rotated to enable the two bogies 420 to stop locking the position between the bogies 420 and the swing bridge 440 along the axial movement, an operator rotates the tire 410 around the rotating shaft 430, enables the axis of the tire 410 to rotate up and down relative to the horizontal plane, enables the outer peripheral surface of the tire 410 to be approximately parallel to the preset position in the tunnel, then drives the wheel-rail walking mechanism 200 to ascend through the interchange mechanism 300, enables the outer peripheral surface of the tire 410 to press against the inner wall of the tunnel, enables the two wheel-rail walking mechanisms 200 and the wheel 210 to ascend and separate from the rail, and can, to facilitate movement and work in locations in the tunnel where no track is laid.

The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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