WO2024109243A1 - Air pressure pipe assembly - Google Patents

Air pressure pipe assembly Download PDF

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Publication number
WO2024109243A1
WO2024109243A1 PCT/CN2023/116414 CN2023116414W WO2024109243A1 WO 2024109243 A1 WO2024109243 A1 WO 2024109243A1 CN 2023116414 W CN2023116414 W CN 2023116414W WO 2024109243 A1 WO2024109243 A1 WO 2024109243A1
Authority
WO
WIPO (PCT)
Prior art keywords
disassembly
air pressure
hose
steel wire
component
Prior art date
Application number
PCT/CN2023/116414
Other languages
French (fr)
Chinese (zh)
Inventor
马宏宇
周燕
于忠建
王爱彬
Original Assignee
中车长春轨道客车股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中车长春轨道客车股份有限公司 filed Critical 中车长春轨道客车股份有限公司
Publication of WO2024109243A1 publication Critical patent/WO2024109243A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C29/00—Arrangements of tyre-inflating valves to tyres or rims; Accessories for tyre-inflating valves, not otherwise provided for
    • B60C29/06—Accessories for tyre-inflating valves, e.g. housings, guards, covers for valve caps, locks, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/24—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with parts screwed directly on or into the hose

Definitions

  • the straddle-type monorail vehicles of the urban rail transit transportation system have the advantages of low noise, small turning radius, strong climbing ability, good terrain adaptability, and lower cost than subways, and have great application prospects.
  • each running wheel device is also equipped with a tire pressure monitoring device consisting of a slip ring, a pressure gauge and an air pressure tube at the end.
  • the air pressure of the running tire is transmitted to the pressure gauge (with a built-in pressure switch with electrical contacts) through the air pressure tube.
  • the circuit of the pressure switch is connected in parallel and connected to the display installed on the vehicle body by wires through the slip ring.
  • the pressure switch in the pressure gauge When the running tire pressure is normal, the pressure switch in the pressure gauge is in the open state, and the tire deflation is not displayed.
  • the pressure switch When the running tire pressure is lower than the specified pressure (750kPa), the pressure switch is in the closed state, and the tire puncture signal will be displayed on the display in the driver's cab, prompting the driver to take corresponding emergency measures to prevent the expansion of the fault and the occurrence of danger.
  • the inner tire valve core close to the drive shaft is far away from the outer tire valve core, and an air pressure pipe is needed to connect the tire valve nozzle on the inner side of the running wheel to the outer side of the wheel for easy inflation and deflation.
  • the air pressure tube is generally a hose, one end of which is connected to the tire valve of the running wheel, and the other end is used to connect to the air pressure gauge, and the air pressure tube is installed in the rim.
  • the air pressure tube and the tire valve are disassembled and assembled, because it is a hose, it cannot transmit torque. Therefore, when replacing the air pressure tube, the bogie must be dropped, and the running tire, rim and related accessories must be disassembled before the air pressure tube can be replaced, which makes the inspection and maintenance time long and labor-intensive.
  • the prior art has a kind of air tube, which includes a long air tube and a short air tube.
  • the long air tube is a rigid tube that can transmit torque.
  • the short air tube is installed on the outside of the running wheel and can be directly disassembled, while the long air tube is installed in the rim and is used to connect the inner running wheel.
  • the long air tube can be disassembled from the tire valve by rotating one end of the long air tube close to the short air tube.
  • the air tube needs to be divided into two parts, there are many connection parts, which is prone to leakage risks, and the rigid tube cannot deform with the environment and cannot avoid surrounding components.
  • an object of the present invention is to provide a pneumatic tube assembly to reduce the time for disassembly, assembly and maintenance of the pneumatic tube and reduce the labor intensity of operation and maintenance personnel.
  • the present invention provides the following technical solutions:
  • a pneumatic tube assembly for a straddle-type monorail vehicle comprising:
  • a steel hose wherein a first end of the steel hose is provided with a first connection portion for connecting to a tire valve, a second end of the steel hose is provided with a second connection portion for connecting to an air pressure gauge, the first connection portion comprises a profiled disassembly component having a profiled connection portion, the profiled disassembly component has a disassembly threaded hole communicating with a tube cavity of the steel hose, and the disassembly threaded hole is used to cooperate with a thread of the tire valve;
  • the disassembly and assembly tool has a disassembly and assembly lumen for sleeved on the outside of the steel wire hose, and the first end of the disassembly and assembly tool has a profile connection hole for profile connection with the profile connection part of the profile disassembly and assembly component.
  • the first connecting portion comprises:
  • a first plug-in component is inserted into the first end of the steel wire hose and has a first plug-in component lumen communicated with the steel wire hose;
  • the profile disassembly part, the rotatable seal is arranged on the first plug-in part, and the disassembly screw
  • the pores are in communication with the first insert lumen
  • a crimping piece is arranged on the first inserting piece and is used to open the first valve core of the tire valve.
  • one end of the first plug-in component is an inserting portion inserted into the first end of the steel wire hose, and the other end is a limiting portion;
  • the outer peripheral surface of the inserting part has an annular clamping tooth that is engaged with the inner wall of the steel hose, and the outer diameter of the limiting part is larger than the maximum outer diameter of the inserting part and is not larger than the minimum diameter of the disassembly threaded hole;
  • a limiting step is arranged at one end of the profiled disassembly and assembly part close to the steel wire hose, and a central hole of the limiting step is smaller than the outer diameter of the limiting part and larger than the maximum outer diameter of the insertion part.
  • a sealing ring fixing groove is provided on the end face of the limiting portion away from the insertion portion, a sealing ring is embedded in the sealing ring fixing groove, the outer peripheral surface of the sealing ring is fitted with the disassembly threaded hole, and the end face of the sealing ring is used to fit with the end face of the tire valve.
  • the profile connection portion of the profile disassembly component is an external hexagonal structure.
  • the second connecting portion is used to communicate with the air pressure gauge through a plug-in assembly, and the plug-in assembly includes:
  • a three-way connector provided with a pressure pipe interface, a pressure gauge interface and an exhaust interface, wherein the pressure gauge interface is used to connect to the pressure gauge;
  • a joint connector both ends of which are respectively used to communicate with the second connecting portion and the air pressure pipe interface.
  • a second valve core is provided in the air pressure gauge interface.
  • the second connecting portion comprises:
  • a second plug-in component is inserted into the second end of the steel wire hose and has a second plug-in component lumen communicated with the steel wire hose;
  • a connecting piece is exposed on the steel wire hose and connected to the joint connector.
  • the joint connector is a bolt with an internal thread connection hole, and the connector has an external thread that matches the thread of the internal thread connection hole;
  • the joint connector is provided with an external threaded mating portion for mating with the thread of the air pressure pipe interface.
  • the second end of the disassembly and assembly tool is provided with an anti-slip disassembly and assembly portion for disassembly and assembly.
  • the present invention provides a pneumatic tube assembly for use in a straddle-type monorail vehicle, the pneumatic tube assembly comprising a steel hose and a disassembly tool.
  • the first end of the steel hose is provided with a first connection portion for connecting to a tire valve
  • the second end of the steel hose is provided with a second connection portion for connecting to a pressure gauge
  • the first connection portion comprising a profiled disassembly component having a profiled connection portion.
  • the profiled disassembly component has a disassembly threaded hole connected to a tube cavity of the steel hose, the disassembly threaded hole being used to cooperate with a thread of the tire valve.
  • the disassembly tool has a disassembly tube cavity for sleeved on the outside of the steel hose, and the first end of the disassembly tool has a profiled connection hole for profile connection with the profiled connection portion of the profiled disassembly component.
  • the steel wire hose When disassembling or installing the steel wire hose, first install the steel wire hose in the disassembly and assembly tube cavity, and the profile connection part of the profile disassembly and assembly part is profile-connected with the profile connection hole of the disassembly and assembly tool, and then the steel wire hose can be disassembled and assembled by applying a tightening force or a loosening force to the disassembly and assembly tool.
  • the steel wire hose of the air pressure tube assembly provided by the present invention can be directly extended into the space between the wheel core and the rim of the running wheel under the action of the disassembly and assembly tool, and the steel wire hose can be replaced without dropping the bogie, disassembling the running tire, rim and related accessories, and the steel wire hose can fit the wheel core layout of the running wheel, the structure is simple and practical, effectively reducing the disassembly and assembly maintenance time of the steel wire hose, and reducing the labor intensity of the operation and maintenance personnel, saving time and effort.
  • FIG1 is a schematic diagram of the installation structure of a steel hose and a running wheel assembly provided in an embodiment of the present invention
  • FIG2 is a schematic diagram of the installation structure of the steel wire hose and the plug-in assembly provided in an embodiment of the present invention
  • FIG3 is a schematic structural diagram of an air pressure tube assembly provided in an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a partial structure of a first connecting member provided in an embodiment of the present invention.
  • 1 is a tire valve
  • 2 is a steel hose
  • 3 is a joint connector
  • 4 is a three-way joint
  • 5 is a first pipe clamp
  • 6 is a first washer
  • 7 is a second washer
  • 8 is a first bolt
  • 9 is a first nut
  • 10 is a third washer
  • 11 is a second pipe clamp
  • 12 is a bracket
  • 13 is a fourth washer
  • 14 is an anti-loosening wire
  • 15 is a second bolt
  • 16 is a third bolt
  • 17 is a running wheel assembly
  • 18 is a disassembly tool
  • 210 is a first connection part
  • 211 is a first plug-in part
  • 212 is a profile disassembly part
  • 213 is a sealing ring
  • 214 is a crimping part
  • 220 is a second connection part
  • 221 is a connection part
  • 222 is a second plug-in part
  • 401 is the air pressure pipe interface
  • 402 is the exhaust interface
  • 403 is the air pressure gauge interface
  • the core of the present invention is to disclose a pneumatic tube assembly to reduce the disassembly, assembly and maintenance time of the pneumatic tube and reduce the labor intensity of operation and maintenance personnel.
  • the inventor of the present application discovered that the end of the air pressure tube close to the outside of the running wheel tire is very easy to be damaged because it needs to be frequently inflated and deflated. Therefore, the air pressure tube needs to be checked for sealing regularly. When the air pressure tube is found to be leaking, it needs to be replaced.
  • the existing air pressure tube is generally a hose, when removing it, the bogie needs to be dropped (that is, in order to separate the bogie and the car body, all mechanical and electrical connections between the bogie and the car body need to be removed), and the running tire, rim and related accessories need to be removed before the air pressure tube can be replaced. This consumes a lot of time for disassembly and assembly and is labor-intensive.
  • the inventor of the present application discovered that the air pressure tube is very easy to be damaged because it needs to be regularly checked for sealing. When the air pressure tube is found to be leaking, it needs to be replaced.
  • the inventors of the present application disclosed the following air pressure tube assembly.
  • an embodiment of the present invention discloses a pneumatic tube assembly for use in a straddle-type monorail vehicle.
  • the pneumatic tube assembly includes a steel hose 2 and a disassembly and assembly tool 18 .
  • the first end of the steel hose 2 is provided with a first connection part 210 for connecting to the tire valve 1, and the second end of the steel hose 2 is provided with a second connection part 220 for connecting to the pressure gauge.
  • the first connection part 210 includes a profiled disassembly part 212 having a profiled connection part.
  • the profile connection part can be used as a force-applying mating surface for mating with a wrench.
  • the profile disassembly part 212 has a disassembly threaded hole connected to the lumen of the steel hose 2, and the disassembly threaded hole is used to threadably mating with the tire valve 1. Since the steel hose 2 is a hose, it can adapt to the surrounding environment by deformation, so that it can be arranged in a close fit with the wheel core of the running wheel and avoid other components on the running wheel assembly 17.
  • the disassembly and assembly tool 18 has a disassembly and assembly lumen for sleeved on the outside of the steel wire hose 2, and a first end of the disassembly and assembly tool has a profile connection hole for profile connection with the profile connection part of the profile disassembly and assembly component.
  • the disassembly tool 18 is installed on the steel hose 2 from the outside of the running wheel assembly 17, and the disassembly tool 18 is rotated to drive the steel hose 2 to rotate accordingly, so as to achieve separation from the tire valve 1.
  • the profile connection part can be an external hexagonal structure
  • the profile connection hole is an internal hexagonal structure matched with the profile connection part.
  • the steel wire hose of the air pressure tube assembly disclosed in the embodiment of the present invention can be directly extended into the space between the wheel core and the rim of the running wheel under the action of the disassembly and assembly tool, and the steel wire hose 2 can be replaced without dropping the bogie, removing the running tire, rim and related accessories, and the steel wire hose 2 can fit the wheel core layout of the running wheel.
  • the structure is simple and practical, which effectively reduces the disassembly and assembly maintenance time of the steel wire hose 2, and reduces the labor intensity of the operation and maintenance personnel, saving time and effort.
  • the first connecting portion 210 includes a first insert 211 , a profile disassembly component 212 and a crimping component 214 .
  • the first plug-in component 211 is plugged into the first end of the steel hose 2 and has a first plug-in component lumen communicated with the steel hose 2.
  • the lumen of the first plug-in component 211 is communicated with the lumen of the steel hose 2.
  • the profile disassembly component 212 is rotatably sealed and disposed on the first insert component 211, and the disassembly threaded hole is communicated with the first insert component lumen.
  • the crimping piece 214 is provided on the first insert 211 and is used to open the first valve core of the tire valve 1.
  • the crimping piece 214 opens the first valve core in the tire valve 1, so that the tire valve 1 is connected to the disassembly threaded hole. Since the disassembly threaded hole is connected to the first insert lumen, the first insert lumen is connected to the lumen of the steel hose 2, and the second end of the steel hose 2 is provided with a second connection part 220 for connecting to a pressure gauge, the tire pressure can be monitored. When the steel hose 2 is removed, the first valve core is automatically closed, so that the tire will not leak from the tire valve 1.
  • one end of the first plug-in part 211 is an inserting part inserted into the first end of the steel wire hose 2, and the other end is a limiting part, which is used to prevent the first plug-in part 211 from detaching from the profile disassembly part 212.
  • the outer peripheral surface of the insertion part has an annular clamping tooth that is engaged with the inner wall of the steel wire hose 2.
  • the inner wall of the tube cavity of the first end of the steel wire hose 2 is a matching clamping tooth for engaging with the annular clamping tooth, and the tooth tip of the annular clamping tooth is inclined toward the direction of the profile disassembly part 212, and the tooth tip of the matching clamping tooth is inclined toward the middle direction of the steel wire hose 2 to achieve the clamping connection between the annular clamping tooth and the matching clamping tooth.
  • the inner wall of the tube cavity of the steel wire hose 2 may not be provided with matching teeth.
  • the annular teeth will squeeze the inner wall of the steel wire hose 2, so that the inner wall of the steel wire hose 2 will be deformed to form matching teeth that engage with the annular teeth.
  • the outer diameter of the limiting part is larger than the maximum outer diameter of the inserting part, and is not larger than the minimum diameter of the disassembly threaded hole.
  • a limiting step is provided at one end of the profile disassembly part 212 close to the wire hose 2, and the center hole of the limiting step is smaller than the outer diameter of the limiting part, and larger than the maximum outer diameter of the inserting part.
  • the limiting part is used to limit the limiting step.
  • the profile disassembly member 212 is first sleeved on the first inserting member 211 from one end of the limiting portion, and when the limiting step moves along the first inserting member 211 to the position of the limiting portion, the profile disassembly member 212 is limited by the limiting portion to prevent it from sliding off the first inserting member 211. Then, the inserting portion of the first inserting member 211 is inserted into the tube cavity of the steel wire hose 2.
  • a sealing ring fixing groove is provided on the end face of the limiting part away from the inserting part, and a sealing ring 213 is embedded in the sealing ring fixing groove.
  • the profile connection portion of the profile disassembly component 212 can be an external hexagonal structure, and the profile connection hole of the disassembly tool 18 can be an internal hexagonal structure that matches the profile connection portion, so that the disassembly tool 18 can easily match the profile connection portion, making it convenient for operation and maintenance personnel to apply force.
  • the second connecting portion 220 is used to communicate with the pressure gauge through a plug-in assembly, and the plug-in assembly includes a three-way connector 4 and a connector plug-in 3.
  • the three-way joint 4 is provided with an air pressure pipe interface 401, an air pressure gauge interface 403 and an exhaust interface 402.
  • the air pressure gauge interface 403 is used to connect the air pressure gauge
  • the exhaust interface 402 is used to inflate or exhaust the tire.
  • the two ends of the joint connector 3 are respectively used to communicate with the second connecting portion 220 and the air pressure pipe interface 401.
  • the three-way joint 4 can be installed after the steel wire hose 2 is installed.
  • a second valve core is provided in the pressure gauge interface 403, and a ejector pin is provided at the interface connecting the pressure gauge and the pressure gauge interface 403, so that when the pressure gauge is installed on the pressure gauge interface 403, the second valve core is opened to connect the pressure gauge interface 403 with the pressure gauge; when the pressure gauge needs to be replaced or repaired, the pressure gauge is removed from the pressure gauge interface 403, the second valve core is automatically closed, and the tire gas will not leak from the pressure gauge interface 403.
  • the second connecting portion 220 includes a second plug-in component 222 and a connecting component 221 .
  • the second plug-in component 222 is inserted into the second end of the steel hose 2 and has a second plug-in component lumen in communication with the steel hose 2.
  • the connector 221 is exposed outside the steel hose 2 and connected to the joint connector 3, so that the steel hose 2 is in communication with the second plug-in component 222, and further, the steel hose 2 is in communication with the three-way connector 4 and the joint connector 3.
  • the end of the second plug-in component 222 inserted into the steel hose 2 can be a structure similar to the snap-fitting between the plug-in portion of the first plug-in component 211 and the first end of the steel hose 2, which will not be described in detail here.
  • the joint connector 3 is a bolt with an internal thread connection hole, and the connector 221 has an external thread that is threadedly matched with the internal thread connection hole.
  • the joint connector 3 is provided with an external thread matching portion for threading with the air pressure pipe interface 401, and the external thread matching portion is threadedly matched with the inner wall of the air pressure pipe interface 401.
  • the second end of the disassembly and assembly tool 18 is provided with an anti-skid disassembly and assembly part for preventing skidding.
  • the steel hose 2 disclosed in the embodiment of the present invention is only fixed at the ends of the tire valve 1 and the running wheel assembly 17.
  • the second end of the steel hose 2 is fixed to the end of the running wheel assembly 17 by a pipe clamp, a bracket 12, etc. This is the prior art and will not be repeated here.
  • first and second are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of the features.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

An air pressure pipe assembly, which is used for a straddle-type monorail vehicle. The air pressure pipe assembly comprises a steel wire hose (2) and an assembling-disassembling tool (18). A first end of the steel wire hose (2) is provided with a first connecting part (210) used for connecting to a tire valve (1), and a second end of the steel wire hose (2) is provided with a second connecting part (220) used for connecting to an air pressure gauge, the first connecting part (210) comprising a profile assembling-disassembling member (212) having a profile connecting part. The assembling-disassembling tool (18) has an assembling-disassembling pipe chamber used for sleeving the outer side of the steel wire hose (2), and the first end of the assembling-disassembling tool (18) is provided with a profile connecting hole used for profile connection with the profile connecting part of the profile assembling-disassembling member (212). Under the action of the assembling-disassembling tool (18), the steel wire hose (2) of the air pressure pipe assembly can directly extend into the space between the hub and the rim of a traveling wheel, and the steel wire hose (2) can be replaced without lowering a bogie and disassembling a traveling wheel tire, the rim and related accessories, thus effectively shortening the assembly, disassembly and maintenance time of the steel wire hose (2), and reducing the labor intensity of operation and maintenance workers.

Description

一种气压管组件A pneumatic tube assembly
本申请要求于2022年11月24日提交中国专利局、申请号为202211480703.X发明名称为“一种气压管组件”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application filed with the China Patent Office on November 24, 2022, with application number 202211480703.X and invention name “A pneumatic tube assembly”, the entire contents of which are incorporated by reference in this application.
技术领域Technical Field
本发明涉及跨座式单轨车辆技术领域，更具体地说，涉及一种气压管组件。The present invention relates to the technical field of straddle-type monorail vehicles, and more particularly to an air pressure tube assembly.
背景技术Background technique
城市轨道交通运输***的跨座式单轨车辆具有噪声小、转弯半径小、爬坡能力强、地形适应性好、造价比地铁低等优点，具有较大的应用前景。The straddle-type monorail vehicles of the urban rail transit transportation system have the advantages of low noise, small turning radius, strong climbing ability, good terrain adaptability, and lower cost than subways, and have great application prospects.
与常见的地铁、轻轨等钢轮车辆相比，跨座式单轨交通车辆在结构和外形上有很大不同，它的车辆是骑跨在轨道梁上运行，转向架的走行轮由充气橡胶轮胎取代传统轨道车辆的钢质车轮，且为双轮胎设计。为了保证安全，每个走行轮装置端部还配有一套由滑环、压力表和气压管组成的胎压监测装置，走行轮胎的气压通过气压管传递至压力表(内置带电触点的压力开关)，压力开关的电路并联连接，并通过滑环由电线连接到设在车体的显示器上，当走行轮胎压正常时，压力表内的压力开关呈开启状态，不显示轮胎泄气，当走行轮胎压低于规定压力(750kPa)时，压力开关呈关闭状态，轮胎刺破信号会显示在司机室的显示器上，提示驾驶员做出相应应急措施，以防止故障扩大及危险的发生。同时，由于走行轮胎为双轮胎结构，靠近驱动轴的内侧轮胎气门芯距离外侧轮胎气门芯距离较远，还需要利用气压管将走行轮内侧的轮胎气门嘴连通到车轮外侧，以便于进行充放气。Compared with common steel-wheeled vehicles such as subways and light rails, straddle-type monorail vehicles are very different in structure and appearance. Their vehicles run astride the rail beams, and the running wheels of the bogies are replaced by pneumatic rubber tires instead of the steel wheels of traditional rail vehicles, and are designed with double tires. In order to ensure safety, each running wheel device is also equipped with a tire pressure monitoring device consisting of a slip ring, a pressure gauge and an air pressure tube at the end. The air pressure of the running tire is transmitted to the pressure gauge (with a built-in pressure switch with electrical contacts) through the air pressure tube. The circuit of the pressure switch is connected in parallel and connected to the display installed on the vehicle body by wires through the slip ring. When the running tire pressure is normal, the pressure switch in the pressure gauge is in the open state, and the tire deflation is not displayed. When the running tire pressure is lower than the specified pressure (750kPa), the pressure switch is in the closed state, and the tire puncture signal will be displayed on the display in the driver's cab, prompting the driver to take corresponding emergency measures to prevent the expansion of the fault and the occurrence of danger. At the same time, since the running tire is a double tire structure, the inner tire valve core close to the drive shaft is far away from the outer tire valve core, and an air pressure pipe is needed to connect the tire valve nozzle on the inner side of the running wheel to the outer side of the wheel for easy inflation and deflation.
现有技术中，气压管一般为软管，一端与走行轮的轮胎气门嘴连接，另一端用于与气压表连接，该气压管安装在轮辋内。在气压管与轮胎气门嘴拆装时，由于其为软管，不能传递力矩，因此在进行气压管更换时必须要落下转向架，拆卸走行轮胎、轮辋及相关附件后，才能进行气压管的更换工作，使得检修维护时间长、劳动强度大。 In the prior art, the air pressure tube is generally a hose, one end of which is connected to the tire valve of the running wheel, and the other end is used to connect to the air pressure gauge, and the air pressure tube is installed in the rim. When the air pressure tube and the tire valve are disassembled and assembled, because it is a hose, it cannot transmit torque. Therefore, when replacing the air pressure tube, the bogie must be dropped, and the running tire, rim and related accessories must be disassembled before the air pressure tube can be replaced, which makes the inspection and maintenance time long and labor-intensive.
为了无需落下转向架，也可完成气压管的更换，现有技术有一种气压管，该气压管包括长气压管和短气压管，长气压管为刚性管，可以传递力矩，短气压管安装在走行轮的外侧能直接拆装，而长气压管安装在轮辋内，用于连接内侧的走行轮，在进行更换时，通过旋转长气压管靠近短气压管的一端，便可完成长气压管由轮胎气门嘴上的拆装作业。但是由于需要将气压管分为两部分，连接部位较多，容易出现泄漏风险，而且刚性管不能随环境变形，无法避让周围的部件。In order to replace the air tube without dropping the bogie, the prior art has a kind of air tube, which includes a long air tube and a short air tube. The long air tube is a rigid tube that can transmit torque. The short air tube is installed on the outside of the running wheel and can be directly disassembled, while the long air tube is installed in the rim and is used to connect the inner running wheel. When replacing, the long air tube can be disassembled from the tire valve by rotating one end of the long air tube close to the short air tube. However, since the air tube needs to be divided into two parts, there are many connection parts, which is prone to leakage risks, and the rigid tube cannot deform with the environment and cannot avoid surrounding components.
因此，如何在采用软管的前提下，减少气压管的拆装维修时间，并降低运维人员的劳动强度，成为本领域技术人员亟待解决的技术问题。Therefore, how to reduce the disassembly and maintenance time of the air pressure pipe and reduce the labor intensity of the operation and maintenance personnel under the premise of using a hose has become a technical problem that needs to be solved urgently by technical personnel in this field.
发明内容Summary of the invention
有鉴于此，本发明的目的在于提供一种气压管组件，以减少气压管的拆装维修时间，并降低运维人员的劳动强度。In view of this, an object of the present invention is to provide a pneumatic tube assembly to reduce the time for disassembly, assembly and maintenance of the pneumatic tube and reduce the labor intensity of operation and maintenance personnel.
为实现上述目的，本发明提供如下技术方案：To achieve the above object, the present invention provides the following technical solutions:
一种气压管组件，用于跨座式单轨车辆，包括：A pneumatic tube assembly for a straddle-type monorail vehicle, comprising:
钢丝软管，所述钢丝软管的第一端设置有用于与轮胎气门嘴连接的第一连接部，所述钢丝软管的第二端设置有用于与气压表连接的第二连接部，所述第一连接部包括具有型面连接部的型面拆装件，所述型面拆装件具有与所述钢丝软管的管腔连通的拆装螺纹孔，所述拆装螺纹孔用于与所述轮胎气门嘴螺纹配合；A steel hose, wherein a first end of the steel hose is provided with a first connection portion for connecting to a tire valve, a second end of the steel hose is provided with a second connection portion for connecting to an air pressure gauge, the first connection portion comprises a profiled disassembly component having a profiled connection portion, the profiled disassembly component has a disassembly threaded hole communicating with a tube cavity of the steel hose, and the disassembly threaded hole is used to cooperate with a thread of the tire valve;
拆装工具，具有用于套设于所述钢丝软管外部的拆装管腔，且所述拆装工具的第一端具有用于与所述型面拆装件的型面连接部型面连接的型面连接孔。The disassembly and assembly tool has a disassembly and assembly lumen for sleeved on the outside of the steel wire hose, and the first end of the disassembly and assembly tool has a profile connection hole for profile connection with the profile connection part of the profile disassembly and assembly component.
优选地，在上述的气压管组件中，所述第一连接部包括：Preferably, in the above-mentioned air pressure tube assembly, the first connecting portion comprises:
第一插装件，插装于所述钢丝软管的第一端，且具有与所述钢丝软管连通的第一插装件管腔；A first plug-in component is inserted into the first end of the steel wire hose and has a first plug-in component lumen communicated with the steel wire hose;
所述型面拆装件，可转动的密封设置于所述第一插装件上，且所述拆装螺 纹孔与所述第一插装件管腔连通；The profile disassembly part, the rotatable seal is arranged on the first plug-in part, and the disassembly screw The pores are in communication with the first insert lumen;
压接件，设置于所述第一插装件，用于打开所述轮胎气门嘴的第一气门芯。A crimping piece is arranged on the first inserting piece and is used to open the first valve core of the tire valve.
优选地，在上述的气压管组件中，所述第一插装件的一端为插装于所述钢丝软管的第一端的插装部，另一端为限位部；Preferably, in the above-mentioned air pressure tube assembly, one end of the first plug-in component is an inserting portion inserted into the first end of the steel wire hose, and the other end is a limiting portion;
所述插装部的外周面具有与所述钢丝软管的内壁卡接配合的环形卡齿，所述限位部的外径大于所述插装部的最大外径，且不大于所述拆装螺纹孔的最小直径；The outer peripheral surface of the inserting part has an annular clamping tooth that is engaged with the inner wall of the steel hose, and the outer diameter of the limiting part is larger than the maximum outer diameter of the inserting part and is not larger than the minimum diameter of the disassembly threaded hole;
所述型面拆装件靠近所述钢丝软管的一端设置有限位台阶，所述限位台阶的中心孔小于所述限位部的外径，且大于所述插装部的最大外径。A limiting step is arranged at one end of the profiled disassembly and assembly part close to the steel wire hose, and a central hole of the limiting step is smaller than the outer diameter of the limiting part and larger than the maximum outer diameter of the insertion part.
优选地，在上述的气压管组件中，所述限位部远离所述插装部的一端的端面上设置有密封圈固定槽，所述密封圈固定槽内嵌装有密封圈，所述密封圈的外周面与所述拆装螺纹孔贴合，所述密封圈的端面用于与所述轮胎气门嘴的端面贴合。Preferably, in the above-mentioned pneumatic tube assembly, a sealing ring fixing groove is provided on the end face of the limiting portion away from the insertion portion, a sealing ring is embedded in the sealing ring fixing groove, the outer peripheral surface of the sealing ring is fitted with the disassembly threaded hole, and the end face of the sealing ring is used to fit with the end face of the tire valve.
优选地，在上述的气压管组件中，所述型面拆装件的型面连接部为外六角结构。Preferably, in the above-mentioned air pressure tube assembly, the profile connection portion of the profile disassembly component is an external hexagonal structure.
优选地，在上述的气压管组件中，所述第二连接部用于通过插接组件与所述气压表连通，所述插接组件包括：Preferably, in the above-mentioned air pressure tube assembly, the second connecting portion is used to communicate with the air pressure gauge through a plug-in assembly, and the plug-in assembly includes:
三通接头，设置有气压管接口、气压表接口和排气接口，所述气压表接口用于与所述气压表连接；A three-way connector, provided with a pressure pipe interface, a pressure gauge interface and an exhaust interface, wherein the pressure gauge interface is used to connect to the pressure gauge;
接头插接件，所述接头插接件的两端分别用于与所述第二连接部和所述气压管接口连通。A joint connector, both ends of which are respectively used to communicate with the second connecting portion and the air pressure pipe interface.
优选地，在上述的气压管组件中，所述气压表接口内设置有第二气门芯。Preferably, in the above-mentioned air pressure tube assembly, a second valve core is provided in the air pressure gauge interface.
优选地，在上述的气压管组件中，所述第二连接部包括：Preferably, in the above-mentioned air pressure tube assembly, the second connecting portion comprises:
第二插装件，插装于所述钢丝软管的第二端，且具有与所述钢丝软管连通的第二插装件管腔； A second plug-in component is inserted into the second end of the steel wire hose and has a second plug-in component lumen communicated with the steel wire hose;
连接件，外露于所述钢丝软管，且与所述接头插接件连接。A connecting piece is exposed on the steel wire hose and connected to the joint connector.
优选地，在上述的气压管组件中，所述接头插接件为开设有内螺纹连接孔的螺栓，所述连接件具有与所述内螺纹连接孔螺纹配合的外螺纹；Preferably, in the above-mentioned air pressure pipe assembly, the joint connector is a bolt with an internal thread connection hole, and the connector has an external thread that matches the thread of the internal thread connection hole;
所述接头插接件设置有用于与所述气压管接口螺纹配合的外螺纹配合部。The joint connector is provided with an external threaded mating portion for mating with the thread of the air pressure pipe interface.
优选地，在上述的气压管组件中，所述拆装工具的第二端设置有用于拆装的防滑拆装部。Preferably, in the above-mentioned air pressure tube assembly, the second end of the disassembly and assembly tool is provided with an anti-slip disassembly and assembly portion for disassembly and assembly.
本发明提供的一种气压管组件，用于跨座式单轨车辆，该气压管组件包括钢丝软管和拆装工具。钢丝软管的第一端设置有用于与轮胎气门嘴连接的第一连接部，钢丝软管的第二端设置有用于与气压表连接的第二连接部，第一连接部包括具有型面连接部的型面拆装件。型面拆装件具有与钢丝软管的管腔连通的拆装螺纹孔，拆装螺纹孔用于与轮胎气门嘴螺纹配合。拆装工具具有用于套设于钢丝软管外部的拆装管腔，且拆装工具的第一端具有用于与型面拆装件的型面连接部型面连接的型面连接孔。The present invention provides a pneumatic tube assembly for use in a straddle-type monorail vehicle, the pneumatic tube assembly comprising a steel hose and a disassembly tool. The first end of the steel hose is provided with a first connection portion for connecting to a tire valve, the second end of the steel hose is provided with a second connection portion for connecting to a pressure gauge, the first connection portion comprising a profiled disassembly component having a profiled connection portion. The profiled disassembly component has a disassembly threaded hole connected to a tube cavity of the steel hose, the disassembly threaded hole being used to cooperate with a thread of the tire valve. The disassembly tool has a disassembly tube cavity for sleeved on the outside of the steel hose, and the first end of the disassembly tool has a profiled connection hole for profile connection with the profiled connection portion of the profiled disassembly component.
在对钢丝软管进行拆卸或安装时，先将钢丝软管安装于拆装管腔内，且型面拆装件的型面连接部与拆装工具的型面连接孔型面连接，再通过向拆装工具施加拧紧力或旋松力，即可实现对钢丝软管的拆装。相较于现有技术在更换为软管的气压管时必须要落下转向架，拆卸走行轮胎、轮辋及相关附件，本发明提供的气压管组件的钢丝软管可在拆装工具的作用下，直接伸入走行轮的轮芯和轮辋之间的空间，不需要落下转向架、拆卸走行轮胎、轮辋及相关附件即可进行钢丝软管的更换工作，且钢丝软管可以贴合走行轮的轮芯布置，结构简单实用，有效减少了钢丝软管的拆装维修时间，并降低了运维人员的劳动强度，省时省力。When disassembling or installing the steel wire hose, first install the steel wire hose in the disassembly and assembly tube cavity, and the profile connection part of the profile disassembly and assembly part is profile-connected with the profile connection hole of the disassembly and assembly tool, and then the steel wire hose can be disassembled and assembled by applying a tightening force or a loosening force to the disassembly and assembly tool. Compared with the prior art, when replacing the air pressure tube with a hose, it is necessary to drop the bogie, disassemble the running tire, rim and related accessories, the steel wire hose of the air pressure tube assembly provided by the present invention can be directly extended into the space between the wheel core and the rim of the running wheel under the action of the disassembly and assembly tool, and the steel wire hose can be replaced without dropping the bogie, disassembling the running tire, rim and related accessories, and the steel wire hose can fit the wheel core layout of the running wheel, the structure is simple and practical, effectively reducing the disassembly and assembly maintenance time of the steel wire hose, and reducing the labor intensity of the operation and maintenance personnel, saving time and effort.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。 In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
图1为本发明实施例提供的钢丝软管与走行轮组件的安装结构示意图；FIG1 is a schematic diagram of the installation structure of a steel hose and a running wheel assembly provided in an embodiment of the present invention;
图2为本发明实施例提供的钢丝软管与插接组件的安装结构示意图；FIG2 is a schematic diagram of the installation structure of the steel wire hose and the plug-in assembly provided in an embodiment of the present invention;
图3为本发明实施例提供的气压管组件的结构示意图；FIG3 is a schematic structural diagram of an air pressure tube assembly provided in an embodiment of the present invention;
图4为本发明实施例提供的第一连接件的局部结构示意图。FIG. 4 is a schematic diagram of a partial structure of a first connecting member provided in an embodiment of the present invention.
其中，1为轮胎气门嘴，2为钢丝软管，3为接头插接件，4为三通接头，5为第一管卡，6为第一垫圈，7为第二垫圈，8为第一螺栓，9为第一螺母，10为第三垫圈，11为第二管卡，12为支架，13为第四垫圈，14为防松铁丝，15为第二螺栓，16为第三螺栓，17为走行轮组件，18为拆装工具；Among them, 1 is a tire valve, 2 is a steel hose, 3 is a joint connector, 4 is a three-way joint, 5 is a first pipe clamp, 6 is a first washer, 7 is a second washer, 8 is a first bolt, 9 is a first nut, 10 is a third washer, 11 is a second pipe clamp, 12 is a bracket, 13 is a fourth washer, 14 is an anti-loosening wire, 15 is a second bolt, 16 is a third bolt, 17 is a running wheel assembly, and 18 is a disassembly tool;
210为第一连接部，211为第一插装件，212为型面拆装件，213为密封圈，214为压接件，220为第二连接部，221为连接件，222为第二插装件；210 is a first connection part, 211 is a first plug-in part, 212 is a profile disassembly part, 213 is a sealing ring, 214 is a crimping part, 220 is a second connection part, 221 is a connection part, and 222 is a second plug-in part;
401为气压管接口，402为排气接口，403为气压表接口。401 is the air pressure pipe interface, 402 is the exhaust interface, and 403 is the air pressure gauge interface.
具体实施方式Detailed ways
本发明的核心在于公开一种气压管组件，以减少气压管的拆装维修时间，并降低运维人员的劳动强度。The core of the present invention is to disclose a pneumatic tube assembly to reduce the disassembly, assembly and maintenance time of the pneumatic tube and reduce the labor intensity of operation and maintenance personnel.
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
本申请的发明人发现，气压管靠近走行轮轮胎外侧的一端，由于需要经常进行充放气，所以非常容易损坏，因此需要定期对气压管的密封性进行检查，当发现气压管漏气时，需要进行更换。但由于现有的气压管一般为软管，在进行拆除时，需要落下转向架(即为将转向架和车体进行分离，需要拆除转向架和车体所有的机械连接和电气连接)，拆卸走行轮胎、轮辋及相关附件后，才能进行气压管的更换工作，耗费了大量拆装时间，且劳动强度大。对此，本申 请的发明人公开了以下的气压管组件。The inventor of the present application discovered that the end of the air pressure tube close to the outside of the running wheel tire is very easy to be damaged because it needs to be frequently inflated and deflated. Therefore, the air pressure tube needs to be checked for sealing regularly. When the air pressure tube is found to be leaking, it needs to be replaced. However, since the existing air pressure tube is generally a hose, when removing it, the bogie needs to be dropped (that is, in order to separate the bogie and the car body, all mechanical and electrical connections between the bogie and the car body need to be removed), and the running tire, rim and related accessories need to be removed before the air pressure tube can be replaced. This consumes a lot of time for disassembly and assembly and is labor-intensive. In this regard, the inventor of the present application discovered that the air pressure tube is very easy to be damaged because it needs to be regularly checked for sealing. When the air pressure tube is found to be leaking, it needs to be replaced. The inventors of the present application disclosed the following air pressure tube assembly.
结合图3，本发明实施例公开的一种气压管组件，用于跨座式单轨车辆，该气压管组件包括钢丝软管2和拆装工具18。In conjunction with FIG. 3 , an embodiment of the present invention discloses a pneumatic tube assembly for use in a straddle-type monorail vehicle. The pneumatic tube assembly includes a steel hose 2 and a disassembly and assembly tool 18 .
钢丝软管2的第一端设置有用于与轮胎气门嘴1连接的第一连接部210，钢丝软管2的第二端设置有用于与气压表连接的第二连接部220，第一连接部210包括具有型面连接部的型面拆装件212。The first end of the steel hose 2 is provided with a first connection part 210 for connecting to the tire valve 1, and the second end of the steel hose 2 is provided with a second connection part 220 for connecting to the pressure gauge. The first connection part 210 includes a profiled disassembly part 212 having a profiled connection part.
在将第一连接部210设置于钢丝软管2的第一端时或将第一连接部210与轮胎气门嘴1连接时，型面连接部可用于作为与扳手件配合的施力配合面。型面拆装件212具有与钢丝软管2的管腔连通的拆装螺纹孔，拆装螺纹孔用于与轮胎气门嘴1螺纹配合。由于钢丝软管2为软管，所以可以通过变形与周围环境相适应，使得可以与走行轮的轮芯贴合布置，并对走行轮组件17上的其他部件进行避让。When the first connection part 210 is arranged at the first end of the steel hose 2 or the first connection part 210 is connected to the tire valve 1, the profile connection part can be used as a force-applying mating surface for mating with a wrench. The profile disassembly part 212 has a disassembly threaded hole connected to the lumen of the steel hose 2, and the disassembly threaded hole is used to threadably mating with the tire valve 1. Since the steel hose 2 is a hose, it can adapt to the surrounding environment by deformation, so that it can be arranged in a close fit with the wheel core of the running wheel and avoid other components on the running wheel assembly 17.
拆装工具18具有用于套设于钢丝软管2外部的拆装管腔，且拆装工具的第一端具有用于与型面拆装件的型面连接部型面连接的型面连接孔。The disassembly and assembly tool 18 has a disassembly and assembly lumen for sleeved on the outside of the steel wire hose 2, and a first end of the disassembly and assembly tool has a profile connection hole for profile connection with the profile connection part of the profile disassembly and assembly component.
结合图1，轮芯和轮辋之间具有可以使拆装工具18用于安装钢丝软管2的空间，在将钢丝软管2安装于轮胎气门嘴1时，先将钢丝软管2安装于拆装管腔内，且型面拆装件212的型面连接部与拆装工具18的型面连接孔型面连接，然后从走行轮组件17的外部将钢丝软管2的第一端伸至轮胎气门嘴1处，通过旋转拆装工具18将钢丝软管2与轮胎气门嘴1连接好后，取出拆装工具18即可。In conjunction with Figure 1, there is a space between the wheel core and the rim for the disassembly tool 18 to be used to install the steel hose 2. When installing the steel hose 2 on the tire valve 1, first install the steel hose 2 in the disassembly tube cavity, and the profile connection portion of the profile disassembly component 212 is profile-connected with the profile connection hole of the disassembly tool 18, and then extend the first end of the steel hose 2 from the outside of the running wheel assembly 17 to the tire valve 1. After connecting the steel hose 2 to the tire valve 1 by rotating the disassembly tool 18, the disassembly tool 18 can be taken out.
检修时，从走行轮组件17的外部将拆装工具18安装到钢丝软管2上，旋转拆装工具18并带动钢丝软管2跟随旋转，即可实现与轮胎气门嘴1的分离。具体地，型面连接部可以为外六角结构，型面连接孔为与型面连接部相配合内六角结构。During maintenance, the disassembly tool 18 is installed on the steel hose 2 from the outside of the running wheel assembly 17, and the disassembly tool 18 is rotated to drive the steel hose 2 to rotate accordingly, so as to achieve separation from the tire valve 1. Specifically, the profile connection part can be an external hexagonal structure, and the profile connection hole is an internal hexagonal structure matched with the profile connection part.
本领域技术人员可以理解的是，型面连接部的外表面只要为非圆截面，均 可在拆装工具18的作用下，被带动跟随转动，外六角结构仅是一种常用的型面结构形式，但不是唯一的结构形式。It will be understood by those skilled in the art that as long as the outer surface of the profile connection portion is a non-circular cross section, Under the action of the disassembly and assembly tool 18, it can be driven to rotate. The external hexagonal structure is only a commonly used surface structure form, but not the only structure form.
相较于现有技术为软管的气压管在更换时必须要落下转向架，拆卸走行轮胎、轮辋及相关附件后，才能进行气压管的更换工作，本发明实施例公开的气压管组件的钢丝软管可在拆装工具的作用下，直接伸入走行轮的轮芯和轮辋之间的空间，不需要落下转向架、拆卸走行轮胎、轮辋及相关附件即可进行钢丝软管2的更换工作，且钢丝软管2可以贴合走行轮的轮芯布置，结构简单实用，有效减少了钢丝软管2的拆装维修时间，并降低了运维人员的劳动强度，省时省力。Compared with the prior art in which the air pressure tube is a hose and the bogie must be lowered when replaced, and the running tire, rim and related accessories must be removed before the air pressure tube can be replaced, the steel wire hose of the air pressure tube assembly disclosed in the embodiment of the present invention can be directly extended into the space between the wheel core and the rim of the running wheel under the action of the disassembly and assembly tool, and the steel wire hose 2 can be replaced without dropping the bogie, removing the running tire, rim and related accessories, and the steel wire hose 2 can fit the wheel core layout of the running wheel. The structure is simple and practical, which effectively reduces the disassembly and assembly maintenance time of the steel wire hose 2, and reduces the labor intensity of the operation and maintenance personnel, saving time and effort.
为了更好地将钢丝软管2和轮胎气门嘴1进行连接，结合图3和图4，第一连接部210包括第一插装件211、型面拆装件212和压接件214。In order to better connect the steel hose 2 and the tire valve 1 , in conjunction with FIG. 3 and FIG. 4 , the first connecting portion 210 includes a first insert 211 , a profile disassembly component 212 and a crimping component 214 .
第一插装件211插装于钢丝软管2的第一端，且具有与钢丝软管2连通的第一插装件管腔。在进行胎压监测时，第一插装件211的管腔与钢丝软管2的管腔连通。The first plug-in component 211 is plugged into the first end of the steel hose 2 and has a first plug-in component lumen communicated with the steel hose 2. When performing tire pressure monitoring, the lumen of the first plug-in component 211 is communicated with the lumen of the steel hose 2.
型面拆装件212可转动的密封设置于第一插装件211上，且拆装螺纹孔与第一插装件管腔连通。The profile disassembly component 212 is rotatably sealed and disposed on the first insert component 211, and the disassembly threaded hole is communicated with the first insert component lumen.
压接件214设置于所述第一插装件211，用于打开轮胎气门嘴1的第一气门芯。当第一连接部210与轮胎气门嘴1连接时，压接件214将轮胎气门嘴1内的第一气门芯打开，使轮胎气门嘴1与拆装螺纹孔连通，又由于拆装螺纹孔与所述第一插装件管腔连通，第一插装件管腔与钢丝软管2的管腔连通，钢丝软管2的第二端设置有用于与气压表连接的第二连接部220，所以可以实现对轮胎胎压的监测。当钢丝软管2被拆下时，第一气门芯自动闭合，使轮胎不会从轮胎气门嘴1处漏气。The crimping piece 214 is provided on the first insert 211 and is used to open the first valve core of the tire valve 1. When the first connection part 210 is connected to the tire valve 1, the crimping piece 214 opens the first valve core in the tire valve 1, so that the tire valve 1 is connected to the disassembly threaded hole. Since the disassembly threaded hole is connected to the first insert lumen, the first insert lumen is connected to the lumen of the steel hose 2, and the second end of the steel hose 2 is provided with a second connection part 220 for connecting to a pressure gauge, the tire pressure can be monitored. When the steel hose 2 is removed, the first valve core is automatically closed, so that the tire will not leak from the tire valve 1.
为了实现钢丝软管2与第一连接部210的连接，第一插装件211的一端为插装于钢丝软管2的第一端的插装部，另一端为限位部，限位部用于防止第一插装件211脱离型面拆装件212。 In order to achieve the connection between the steel wire hose 2 and the first connecting part 210, one end of the first plug-in part 211 is an inserting part inserted into the first end of the steel wire hose 2, and the other end is a limiting part, which is used to prevent the first plug-in part 211 from detaching from the profile disassembly part 212.
插装部的外周面具有与钢丝软管2的内壁卡接配合的环形卡齿，钢丝软管2的第一端的管腔内壁为用于与环形卡齿卡接的配合卡齿，且环形卡齿的齿尖向型面拆装件212的方向倾斜，配合卡齿的齿尖向钢丝软管2的中间方向倾斜，以实现环形卡齿与配合卡齿的卡接。The outer peripheral surface of the insertion part has an annular clamping tooth that is engaged with the inner wall of the steel wire hose 2. The inner wall of the tube cavity of the first end of the steel wire hose 2 is a matching clamping tooth for engaging with the annular clamping tooth, and the tooth tip of the annular clamping tooth is inclined toward the direction of the profile disassembly part 212, and the tooth tip of the matching clamping tooth is inclined toward the middle direction of the steel wire hose 2 to achieve the clamping connection between the annular clamping tooth and the matching clamping tooth.
需要说明的是，钢丝软管2的管腔内壁也可不设置配合卡齿，利用钢丝软管2的塑性变形效果，在插装部***钢丝软管2后，环形卡齿会挤压钢丝软管2的内壁，以使得钢丝软管2的内壁发生形变，形成与环形卡齿咬合的配合卡齿。It should be noted that the inner wall of the tube cavity of the steel wire hose 2 may not be provided with matching teeth. By utilizing the plastic deformation effect of the steel wire hose 2, after the steel wire hose 2 is inserted into the insertion part, the annular teeth will squeeze the inner wall of the steel wire hose 2, so that the inner wall of the steel wire hose 2 will be deformed to form matching teeth that engage with the annular teeth.
限位部的外径大于插装部的最大外径，且不大于拆装螺纹孔的最小直径。型面拆装件212靠近钢丝软管2的一端设置有限位台阶，限位台阶的中心孔小于限位部的外径，且大于插装部的最大外径，限位部用于对限位台阶进行限制。The outer diameter of the limiting part is larger than the maximum outer diameter of the inserting part, and is not larger than the minimum diameter of the disassembly threaded hole. A limiting step is provided at one end of the profile disassembly part 212 close to the wire hose 2, and the center hole of the limiting step is smaller than the outer diameter of the limiting part, and larger than the maximum outer diameter of the inserting part. The limiting part is used to limit the limiting step.
安装时，首先将型面拆装件212由限位部的一端套设于第一插装件211上，在限位台阶沿第一插装件211移动至限位部的位置时，受到限位部的限位，可以阻止型面拆装件212由第一插装件211滑落。然后将第一插装件211的插装部***钢丝软管2的管腔即可。During installation, the profile disassembly member 212 is first sleeved on the first inserting member 211 from one end of the limiting portion, and when the limiting step moves along the first inserting member 211 to the position of the limiting portion, the profile disassembly member 212 is limited by the limiting portion to prevent it from sliding off the first inserting member 211. Then, the inserting portion of the first inserting member 211 is inserted into the tube cavity of the steel wire hose 2.
为了防止第一连接部210与轮胎气门嘴1的连接处发生漏气，限位部远离插装部的一端的端面上设置有密封圈固定槽，密封圈固定槽内嵌装有密封圈213，在第一连接部210与轮胎气门嘴1固定好之后，密封圈213的外周面与拆装螺纹孔贴合，密封圈213的端面与轮胎气门嘴1的端面贴合，使轮胎气体在流通时，不会从第一插装件211与型面拆装件212的连接处泄露。In order to prevent air leakage at the connection between the first connecting part 210 and the tire valve 1, a sealing ring fixing groove is provided on the end face of the limiting part away from the inserting part, and a sealing ring 213 is embedded in the sealing ring fixing groove. After the first connecting part 210 and the tire valve 1 are fixed, the outer peripheral surface of the sealing ring 213 fits with the disassembly threaded hole, and the end face of the sealing ring 213 fits with the end face of the tire valve 1, so that the tire gas will not leak from the connection between the first inserting part 211 and the profile disassembly part 212 when circulating.
型面拆装件212的型面连接部可以为外六角结构，拆装工具18的型面连接孔为与型面连接部配合的内六角结构，以使拆装工具18可以方便地与型面连接部相配合，便于运维人员施加作用力。The profile connection portion of the profile disassembly component 212 can be an external hexagonal structure, and the profile connection hole of the disassembly tool 18 can be an internal hexagonal structure that matches the profile connection portion, so that the disassembly tool 18 can easily match the profile connection portion, making it convenient for operation and maintenance personnel to apply force.
在本发明公开的一个具体的实施例中，第二连接部220用于通过插接组件与气压表连通，插接组件包括三通接头4和接头插接件3。 In a specific embodiment disclosed in the present invention, the second connecting portion 220 is used to communicate with the pressure gauge through a plug-in assembly, and the plug-in assembly includes a three-way connector 4 and a connector plug-in 3.
三通接头4设置有气压管接口401、气压表接口403和排气接口402，气压表接口403用于连接气压表，排气接口402用于向轮胎内充气或排气。接头插接件3的两端分别用于与第二连接部220和气压管接口401连通。具体地，可在安装好钢丝软管2后，再安装三通接头4。The three-way joint 4 is provided with an air pressure pipe interface 401, an air pressure gauge interface 403 and an exhaust interface 402. The air pressure gauge interface 403 is used to connect the air pressure gauge, and the exhaust interface 402 is used to inflate or exhaust the tire. The two ends of the joint connector 3 are respectively used to communicate with the second connecting portion 220 and the air pressure pipe interface 401. Specifically, the three-way joint 4 can be installed after the steel wire hose 2 is installed.
为了防止在拆装气压表时从气压表接口403处漏气，气压表接口403内设置有第二气门芯，气压表与气压表接口403连通的接口处设置有顶针，用于在气压表接口403上安装气压表时，将第二气门芯打开，使气压表接口403与气压表连通；当需要对气压表进行更换或维修时，将气压表从气压表接口403取下后，第二气门芯自动关闭，轮胎气体不会从气压表接口403处泄露。In order to prevent air leakage from the pressure gauge interface 403 when disassembling and assembling the pressure gauge, a second valve core is provided in the pressure gauge interface 403, and a ejector pin is provided at the interface connecting the pressure gauge and the pressure gauge interface 403, so that when the pressure gauge is installed on the pressure gauge interface 403, the second valve core is opened to connect the pressure gauge interface 403 with the pressure gauge; when the pressure gauge needs to be replaced or repaired, the pressure gauge is removed from the pressure gauge interface 403, the second valve core is automatically closed, and the tire gas will not leak from the pressure gauge interface 403.
为了实现钢丝软管2与插接组件的连接，第二连接部220包括第二插装件222和连接件221。In order to achieve the connection between the steel hose 2 and the plug-in assembly, the second connecting portion 220 includes a second plug-in component 222 and a connecting component 221 .
第二插装件222插装于钢丝软管2的第二端，且具有与钢丝软管2连通的第二插装件管腔。连接件221外露于钢丝软管2，且与接头插接件3连接，以使钢丝软管2与第二插装件222连通，进一步地，使钢丝软管2与三通接头4和接头插接件3连通。其中，第二插装件222插装于钢丝软管2内的一端可以为与第一插装件211的插接部与钢丝软管2的第一端的卡接配合相类似的结构，在此不再赘述。The second plug-in component 222 is inserted into the second end of the steel hose 2 and has a second plug-in component lumen in communication with the steel hose 2. The connector 221 is exposed outside the steel hose 2 and connected to the joint connector 3, so that the steel hose 2 is in communication with the second plug-in component 222, and further, the steel hose 2 is in communication with the three-way connector 4 and the joint connector 3. Among them, the end of the second plug-in component 222 inserted into the steel hose 2 can be a structure similar to the snap-fitting between the plug-in portion of the first plug-in component 211 and the first end of the steel hose 2, which will not be described in detail here.
为了实现接头插接件3的连接功能，接头插接件3为开设有内螺纹连接孔的螺栓，连接件221具有与内螺纹连接孔螺纹配合的外螺纹。接头插接件3设置有用于与气压管接口401螺纹配合的外螺纹配合部，外螺纹配合部与气压管接口401的内壁螺纹配合。In order to realize the connection function of the joint connector 3, the joint connector 3 is a bolt with an internal thread connection hole, and the connector 221 has an external thread that is threadedly matched with the internal thread connection hole. The joint connector 3 is provided with an external thread matching portion for threading with the air pressure pipe interface 401, and the external thread matching portion is threadedly matched with the inner wall of the air pressure pipe interface 401.
为了便于在拆装钢丝软管2时便于运维人员对钢丝软管2施加拧紧力或旋松力，拆装工具18的第二端设置有用于防滑的防滑拆装部。In order to facilitate the operation and maintenance personnel to apply tightening force or loosening force to the steel wire hose 2 when disassembling and assembling the steel wire hose 2, the second end of the disassembly and assembly tool 18 is provided with an anti-skid disassembly and assembly part for preventing skidding.
为了拆装方便，本发明实施例公开的钢丝软管2仅在轮胎气门嘴1和走行轮组件17的端部固定。其中，钢丝软管2的第二端用管卡、支架12等固定于走行轮组件17的端部，此为现有技术，在此不再赘述。 For easy disassembly and assembly, the steel hose 2 disclosed in the embodiment of the present invention is only fixed at the ends of the tire valve 1 and the running wheel assembly 17. Among them, the second end of the steel hose 2 is fixed to the end of the running wheel assembly 17 by a pipe clamp, a bracket 12, etc. This is the prior art and will not be repeated here.
需要说明的是，本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
如本申请和权利要求书中所示，除非上下文明确提示例外情形，“一”、“一个”、“一种”和/或“该”等词并非特指单数，也可包括复数。一般说来，术语“包括”与“包含”仅提示包括已明确标识的步骤和元素，而这些步骤和元素不构成一个排它性的罗列，方法或者设备也可能包含其它的步骤或元素。由语句“包括一个……”限定的要素，并不排除在包括要素的过程、方法、商品或者设备中还存在另外的相同要素。As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and/or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。 The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims (10)

  1. 一种气压管组件，其特征在于，用于跨座式单轨车辆，包括：A pneumatic tube assembly, characterized in that it is used for a straddle-type monorail vehicle, comprising:
    钢丝软管(2)，所述钢丝软管(2)的第一端设置有用于与轮胎气门嘴(1)连接的第一连接部(210)，所述钢丝软管(2)的第二端设置有用于与气压表连接的第二连接部(220)，所述第一连接部(210)包括具有型面连接部的型面拆装件(212)，所述型面拆装件(212)具有与所述钢丝软管(2)的管腔连通的拆装螺纹孔，所述拆装螺纹孔用于与所述轮胎气门嘴(1)螺纹配合；A steel hose (2), wherein a first end of the steel hose (2) is provided with a first connection portion (210) for connecting to a tire valve (1), and a second end of the steel hose (2) is provided with a second connection portion (220) for connecting to an air pressure gauge, wherein the first connection portion (210) comprises a profiled disassembly component (212) having a profiled connection portion, wherein the profiled disassembly component (212) has a disassembly threaded hole communicating with a tube cavity of the steel hose (2), and wherein the disassembly threaded hole is used to threadably cooperate with the tire valve (1);
    拆装工具(18)，具有用于套设于所述钢丝软管(2)外部的拆装管腔，且所述拆装工具(18)的第一端具有用于与所述型面拆装件(212)的型面连接部型面连接的型面连接孔。The disassembly and assembly tool (18) has a disassembly and assembly lumen for being sleeved on the outside of the steel wire hose (2), and the first end of the disassembly and assembly tool (18) has a profile connection hole for profile connection with the profile connection part of the profile disassembly and assembly component (212).
  2. 如权利要求1所述的气压管组件，其特征在于，所述第一连接部(210)包括：The air pressure tube assembly according to claim 1, characterized in that the first connecting portion (210) comprises:
    第一插装件(211)，插装于所述钢丝软管(2)的第一端，且具有与所述钢丝软管(2)连通的第一插装件管腔；A first plug-in component (211) is plugged into a first end of the steel wire hose (2) and has a first plug-in component lumen communicating with the steel wire hose (2);
    所述型面拆装件(212)，可转动的密封设置于所述第一插装件(211)上，且所述拆装螺纹孔与所述第一插装件管腔连通；The profiled disassembly component (212) is rotatably sealed and arranged on the first plug-in component (211), and the disassembly threaded hole is in communication with the first plug-in component lumen;
    压接件(214)，设置于所述第一插装件(211)，用于打开所述轮胎气门嘴(1)的第一气门芯。A crimping piece (214) is arranged on the first inserting piece (211) and is used to open the first valve core of the tire valve (1).
  3. 如权利要求2所述的气压管组件，其特征在于，所述第一插装件(211)的一端为插装于所述钢丝软管(2)的第一端的插装部，另一端为限位部；The air pressure tube assembly according to claim 2, characterized in that one end of the first plug-in component (211) is an inserting portion inserted into the first end of the steel wire hose (2), and the other end is a limiting portion;
    所述插装部的外周面具有与所述钢丝软管(2)的内壁卡接配合的环形卡齿，所述限位部的外径大于所述插装部的最大外径，且不大于所述拆装螺纹孔的最小直径； The outer peripheral surface of the insertion portion has an annular clamping tooth that is engaged with the inner wall of the steel hose (2); the outer diameter of the limiting portion is larger than the maximum outer diameter of the insertion portion and is not larger than the minimum diameter of the disassembly threaded hole;
    所述型面拆装件(212)靠近所述钢丝软管(2)的一端设置有限位台阶，所述限位台阶的中心孔小于所述限位部的外径，且大于所述插装部的最大外径。A limiting step is provided at one end of the profiled disassembly and assembly part (212) close to the steel wire hose (2), and a central hole of the limiting step is smaller than the outer diameter of the limiting portion and larger than the maximum outer diameter of the insertion portion.
  4. 如权利要求3所述的气压管组件，其特征在于，所述限位部远离所述插装部的一端的端面上设置有密封圈固定槽，所述密封圈固定槽内嵌装有密封圈(213)，所述密封圈(213)的外周面与所述拆装螺纹孔贴合，所述密封圈(213)的端面用于与所述轮胎气门嘴(1)的端面贴合。The air pressure tube assembly as described in claim 3 is characterized in that a sealing ring fixing groove is provided on the end face of the limiting portion away from the insertion portion, a sealing ring (213) is embedded in the sealing ring fixing groove, the outer peripheral surface of the sealing ring (213) is fitted with the disassembly threaded hole, and the end face of the sealing ring (213) is used to fit with the end face of the tire valve (1).
  5. 如权利要求2所述的气压管组件，其特征在于，所述型面拆装件(212)的型面连接部为外六角结构。The air pressure tube assembly according to claim 2 is characterized in that the profile connection portion of the profile disassembly component (212) is an external hexagonal structure.
  6. 如权利要求1所述的气压管组件，其特征在于，所述第二连接部(220)用于通过插接组件与所述气压表连通，所述插接组件包括：The air pressure tube assembly according to claim 1, characterized in that the second connecting portion (220) is used to communicate with the air pressure gauge through a plug-in assembly, and the plug-in assembly comprises:
    三通接头(4)，设置有气压管接口(401)、气压表接口(403)和排气接口(402)，所述气压表接口(403)用于与所述气压表连接；A three-way connector (4) is provided with a pressure pipe interface (401), a pressure gauge interface (403) and an exhaust interface (402), wherein the pressure gauge interface (403) is used to connect to the pressure gauge;
    接头插接件(3)，所述接头插接件(3)的两端分别用于与所述第二连接部(220)和所述气压管接口(401)连通。A joint connector (3), wherein two ends of the joint connector (3) are respectively used to communicate with the second connecting portion (220) and the air pressure pipe interface (401).
  7. 如权利要求6所述的气压管组件，其特征在于，所述气压表接口(403)内设置有第二气门芯。The air pressure tube assembly according to claim 6, characterized in that a second valve core is provided in the air pressure gauge interface (403).
  8. 如权利要求6所述的气压管组件，其特征在于，所述第二连接部(220)包括：The air pressure tube assembly according to claim 6, characterized in that the second connecting portion (220) comprises:
    第二插装件(222)，插装于所述钢丝软管(2)的第二端，且具有与所述钢丝软管(2)连通的第二插装件管腔；A second plug-in component (222) is plugged into the second end of the steel wire hose (2) and has a second plug-in component lumen communicating with the steel wire hose (2);
    连接件(221)，外露于所述钢丝软管(2)，且与所述接头插接件(3)连接。The connecting piece (221) is exposed on the steel wire hose (2) and is connected to the joint plug-in piece (3).
  9. 如权利要求8所述的气压管组件，其特征在于，所述接头插接件(3)为开设有内螺纹连接孔的螺栓，所述连接件(221)具有与所述内螺纹连接孔螺纹配合的外螺纹； The air pressure pipe assembly according to claim 8, characterized in that the joint connector (3) is a bolt with an internal threaded connection hole, and the connector (221) has an external thread that matches the thread of the internal threaded connection hole;
    所述接头插接件(3)设置有用于与所述气压管接口(401)螺纹配合的外螺纹配合部。The joint connector (3) is provided with an external threaded mating portion for threadably mating with the air pressure pipe interface (401).
  10. 如权利要求1～9任意一项所述的气压管组件，其特征在于，所述拆装工具(18)的第二端设置有用于拆装的防滑拆装部。 The air pressure tube assembly according to any one of claims 1 to 9, characterized in that the second end of the disassembly tool (18) is provided with an anti-slip disassembly portion for disassembly.
PCT/CN2023/116414 2022-11-24 2023-09-01 Air pressure pipe assembly WO2024109243A1 (en)

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CN202211480703.XA CN115716389A (en) 2022-11-24 2022-11-24 Pneumatic tube assembly
CN202211480703.X 2022-11-24

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WO2024109243A1 true WO2024109243A1 (en) 2024-05-30

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115716389A (en) * 2022-11-24 2023-02-28 中车长春轨道客车股份有限公司 Pneumatic tube assembly

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JP3158459U (en) * 2010-01-18 2010-04-02 郷田 元宏 Hand-tightened joint
US20120086201A1 (en) * 2010-10-12 2012-04-12 Joseph Stevenson Murken Detachable hose coupling and staple remover
WO2016117728A1 (en) * 2015-01-23 2016-07-28 (주)티에이치엔 Tire air pressure measurement module and valve cap for tire air injection valve
US20180257205A1 (en) * 2017-03-09 2018-09-13 Thomas Wood Multipurpose tire tool
CN110035909A (en) * 2016-10-19 2019-07-19 伊夸莱尔***公司 Manifold inflation
CN212148783U (en) * 2020-03-06 2020-12-15 重庆君雅科技有限责任公司 Train tire pressure detection equipment
CN214822405U (en) * 2021-03-26 2021-11-23 万通智控科技股份有限公司 Be suitable for joint that has limit structure of inflating valve extension tube
CN214928754U (en) * 2021-05-11 2021-11-30 中车长春轨道客车股份有限公司 A pneumatic tube structure that is used for single track vehicle's not bogie of falling to change
CN115716389A (en) * 2022-11-24 2023-02-28 中车长春轨道客车股份有限公司 Pneumatic tube assembly

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3158459U (en) * 2010-01-18 2010-04-02 郷田 元宏 Hand-tightened joint
US20120086201A1 (en) * 2010-10-12 2012-04-12 Joseph Stevenson Murken Detachable hose coupling and staple remover
WO2016117728A1 (en) * 2015-01-23 2016-07-28 (주)티에이치엔 Tire air pressure measurement module and valve cap for tire air injection valve
CN110035909A (en) * 2016-10-19 2019-07-19 伊夸莱尔***公司 Manifold inflation
US20180257205A1 (en) * 2017-03-09 2018-09-13 Thomas Wood Multipurpose tire tool
CN212148783U (en) * 2020-03-06 2020-12-15 重庆君雅科技有限责任公司 Train tire pressure detection equipment
CN214822405U (en) * 2021-03-26 2021-11-23 万通智控科技股份有限公司 Be suitable for joint that has limit structure of inflating valve extension tube
CN214928754U (en) * 2021-05-11 2021-11-30 中车长春轨道客车股份有限公司 A pneumatic tube structure that is used for single track vehicle's not bogie of falling to change
CN115716389A (en) * 2022-11-24 2023-02-28 中车长春轨道客车股份有限公司 Pneumatic tube assembly

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