CN109050568B - Coupling device for coupling engineering truck with semipermanent traction rod for subway - Google Patents
Coupling device for coupling engineering truck with semipermanent traction rod for subway Download PDFInfo
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- CN109050568B CN109050568B CN201811074423.2A CN201811074423A CN109050568B CN 109050568 B CN109050568 B CN 109050568B CN 201811074423 A CN201811074423 A CN 201811074423A CN 109050568 B CN109050568 B CN 109050568B
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- connecting rod
- stop block
- rod
- shoulder
- sleeve
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- 230000008878 coupling Effects 0.000 title description 14
- 238000010168 coupling process Methods 0.000 title description 14
- 238000005859 coupling reaction Methods 0.000 title description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 230000007704 transition Effects 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
- B61G9/00—Draw-gear
- B61G9/20—Details; Accessories
- B61G9/24—Linkages between draw-bar and framework
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Lowering Means (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention provides a coupler device for connecting a semi-permanent traction rod for a engineering vehicle and a subway, wherein a sleeve (3) is arranged at one end, connected with the semi-permanent traction rod (2), of the coupler device (1), and a connecting rod mechanism (4) for positioning the semi-permanent traction rod (2) is arranged on the sleeve (3). The beneficial effects of the invention are as follows: the engineering truck or the highway and railway dual-purpose truck can be directly connected with the subway vehicle without other external force and other parts, so that the connecting efficiency is improved, and the manufacturing cost is reduced.
Description
Technical Field
The invention belongs to the technical field of subway coupler coupling innovation, and relates to a structural design of a coupler coupling device for engineering vehicles.
Background
In the process of overhauling the subway vehicle, the subway vehicle needs to be connected and towed through an engineering vehicle or a highway and railway dual-purpose vehicle, and as the subway vehicle generally adopts a tight-lock coupler, one end of each vehicle is provided with a semi-permanent traction rod, and the engineering vehicle on the subway overhauling line at present generally adopts a No. 2 coupler or a No. 13 coupler and transitional coupler combination to carry out the connection and towing on the subway vehicle. And the connection with the transition hook can be realized only by means of the connecting ring.
The transition hook is heavy, and is often needed to be hung by means of a crown block or a forklift, so that time and labor are consumed. The semi-permanent transition hook needs to be connected with the semi-permanent traction rod by a connecting ring (shown in figure 1), and the connecting step is complex. The transition hook has high cost and is not beneficial to improving the market competitiveness of the engineering truck.
In order to enable an engineering vehicle or a highway and railway dual-purpose vehicle to be directly connected with a single-section metro vehicle for convenient maintenance and movement, a car coupler connecting device capable of being directly connected with a semi-permanent traction rod of the metro vehicle is studied.
Disclosure of Invention
The invention provides a coupler device for connecting a semi-permanent traction rod for a subway, which aims to solve the problem of providing a coupler device for connecting a semi-permanent traction rod for a engineering vehicle with a subway.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a coupling device that semi-permanent traction lever for engineering truck was hung with subway, coupling device is equipped with the sleeve with the one end that semi-permanent traction lever was connected, be equipped with on the sleeve and be used for the location semi-permanent traction lever's link mechanism.
Further, the sleeve comprises a large inner diameter part and a small inner diameter part which are integrally connected, a transition shoulder is formed at the joint of the large inner diameter part and the small inner diameter part, a groove is formed in the small inner diameter part, and a jack is formed in the groove.
Further, the link mechanism comprises a stop block, a first link, a second link, a third link, a fourth link, a piston rod and a cylinder which are sequentially connected, wherein the first link is perpendicular to the sleeve, the piston rod is parallel to the sleeve, and the first link, the second link, the third link, the fourth link and the piston rod are sequentially and rotatably connected;
The connecting rod mechanism is also provided with a supporting rod, the supporting rod is arranged in parallel with the first connecting rod, one end of the supporting rod is fixedly connected with the outer wall of the sleeve, and the other end of the supporting rod is rotationally connected with the middle part of the second connecting rod;
the first connecting rod is positioned in the jack and fixedly connected with the stop block; the stop block is positioned in the groove, a spring is arranged between the stop block and the inner wall of the groove, and the spring is sleeved on the first connecting rod.
Further, a stepped boss structure is arranged on the outer side wall of the semi-permanent traction rod, a stop shoulder structure is arranged on the stop block, and the stop shoulder and the transition shoulder in the sleeve form a stepped shoulder structure matched with the stepped boss structure together.
Further, the outer side wall of the semi-permanent traction rod is provided with a continuous first-stage boss and a continuous second-stage boss, the stop block is provided with a first-stage shoulder and a second-stage shoulder, when the coupler device is in a connecting state, the first-stage boss is positioned between the transition shoulder and the first-stage shoulder, and the second-stage boss is in butt joint with the second-stage shoulder.
Further, the surface of the first-stage shoulder opposite to the first-stage boss is a small inclined surface of the stop block, and the other surface of the stop block opposite to the small inclined surface of the stop block is a large inclined surface of the stop block.
Further, the first connecting rod and the stop block are fixed in a welding mode.
The invention has the advantages and positive effects that:
the engineering truck or the highway and railway dual-purpose truck can be directly connected with the subway vehicle without other external force and other parts, so that the connecting efficiency is improved, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic view of a prior art semi-permanent drawbar and transition hook coupled by a coupling ring;
FIG. 2 is a schematic diagram of a coupling device and a semi-permanent drawbar in an on-hook condition in an embodiment;
FIG. 3 is a schematic diagram of a coupling device coupled to a semi-permanent drawbar in an exemplary embodiment;
FIG. 4 is a schematic diagram of an embodiment of a coupler device uncoupled from a semi-permanent drawbar;
FIG. 5 is a schematic illustration of the construction of the semi-permanent drawbar of the embodiment;
FIG. 6 is a schematic view of the structure of the sleeve and the linkage mechanism used in combination in the embodiment;
FIG. 7 is a schematic view of the structure of the link mechanism in the embodiment;
FIG. 8 is a schematic view of the structure of the stopper according to the embodiment;
FIG. 9 is a schematic illustration of the secondary shoulder contact force transfer of the hitch state semi-permanent tie-down bar and stop in an embodiment.
In the figure: 1-coupler device, 2-semi-permanent traction rod, 21-first-stage boss, 22-second-stage boss, 3-sleeve, 31-large inner diameter part, 32-small inner diameter part, 33-transition shoulder, 34-groove, 4-link mechanism, 41-first link, 42-second link, 43-third link, 44-fourth link, 45-piston rod, 46-cylinder, 47-stopper, 47 a-first-stage shoulder, 47 b-second-stage shoulder, 47 c-stopper small inclined plane, 47 d-stopper large inclined plane, 48-spring, 49-strut;
a-transitional hooks, B-connection loops.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the invention, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
In some embodiments, the coupler device may be used as a transition coupler for connection with a number 2 coupler or a number 13 coupler for use with an engineering vehicle, or directly as a coupler for an engineering vehicle, the coupler device being connected with a semi-permanent drawbar of the metro vehicle, thereby coupling the metro vehicle to the engineering vehicle.
The end of the coupler device 1 connected with the semi-permanent traction rod 2 is provided with a sleeve 3, and the sleeve 3 is provided with a connecting rod mechanism 4 used for positioning the semi-permanent traction rod 2.
The sleeve 3 comprises a large inner diameter part 31 and a small inner diameter part 32 which are integrally connected, a transition shoulder 33 is formed at the joint of the large inner diameter part 31 and the small inner diameter part 32, a groove 34 is arranged in the small inner diameter part 32, and a jack is arranged on the groove 34.
The link mechanism 4 comprises a stop block 47, a first link 41, a second link 42, a third link 43, a fourth link 44, a piston rod 45 and a cylinder 46 which are sequentially connected, wherein the first link 41 is arranged vertically to the sleeve 3, the piston rod 45 is arranged in parallel to the sleeve 3, and the first link 41, the second link 42, the third link 43, the fourth link 44 and the piston rod 45 are sequentially and rotatably connected; the link mechanism 4 is further provided with a supporting rod 49, the supporting rod 49 is arranged in parallel with the first link 41, one end of the supporting rod 49 is fixedly connected with the outer wall of the sleeve 3, and the other end of the supporting rod 49 is rotatably connected with the middle part of the second link 42; the first connecting rod 41 is positioned in the jack and is fixed with the stop block 47 in a welding way; the stop block 47 is located in the groove 34, a spring 48 is disposed between the stop block 47 and the inner wall of the groove 34, and the spring 48 is sleeved on the first link 41.
The arrangement of the connecting rods mainly completes the conversion of the output force direction of the air cylinder.
Under the action of the air cylinder and the connecting rod, the stop block moves up and down in the space defined by the groove.
The outer side wall of the semi-permanent traction rod 2 is provided with a stepped boss structure, the stop block is provided with a stop block shoulder structure, the stop block shoulder and the transition shoulder in the sleeve form a stepped shoulder structure matched with the stepped boss structure together, particularly, the outer side wall of the semi-permanent traction rod 2 is provided with a continuous primary boss 21 and a continuous secondary boss 22, the stop block 47 is provided with a primary shoulder 47a and a secondary shoulder 47b, when the coupler device 1 is in a coupling state, the primary boss 21 is positioned between the transition shoulder 33 and the primary shoulder 47a, the secondary boss 22 is abutted with the secondary shoulder 47b, the surface of the primary shoulder 47a opposite to the primary boss 21 is a stop block small inclined surface 47c, and the other surface of the stop block 47 opposite to the stop block small inclined surface 47c is a stop block large inclined surface 47d.
In some embodiments, the coupling device may be directly coupled to the semi-permanent drawbar, and may be divided into a to-be-coupled state, a coupled state, and a uncoupled state.
Hanging state: the cylinder is not in action, the spring is in a free state, and the stop block extends into the sleeve from the groove.
Connection and hanging state: the semi-permanent traction rod stretches into the sleeve, a first-stage boss of the semi-permanent traction rod is firstly contacted with a large inclined surface of the stop block and applies pressure to the stop block, the stop block compresses the spring to move inwards in the groove under the action of the pressure, when the semi-permanent traction rod passes over the large inclined surface of the stop block and continues to move inwards the sleeve, the stop block extrudes the semi-permanent traction rod under the action of the restoring force of the spring, the stepped boss structure and the stepped shoulder structure are mutually clamped, and finally the semi-permanent traction rod is clamped to finish continuous hanging.
Unhooking state: the cylinder is inflated, the connecting rod is driven by force direction conversion, so that the first connecting rod acts, the first connecting rod drives the stop block to compress the spring, and the stop block is pressed in the groove, so that the semi-permanent traction rod can be outwards separated from the sleeve.
In some embodiments, the stress of the sleeve and the stop is exemplified by the maximum coupler force 375kN of each section of the Z4 line empty push rescue superman fault train: the secondary shoulders of the hitch half-permanent drawbar and block contact the force transfer as shown in fig. 9:
the sleeve had an outer diameter of 254mm, and the sleeve had an inner diameter of 144mm in the large inner diameter portion and 112mm in the small inner diameter portion.
The maximum stress of the sleeve is 228MPa, and the material is Q345B steel.
The maximum stress of the stop block is 540MPa, and the material is ZGD650-830 steel.
The connecting rods are made of No. 45 steel.
The spring is a non-standard piece, and the calculated parameters are as follows:
the diameter d=3.5 mm, the material 65Mn, the diameter D=25 mm,
Test load fs=444.5n, and the stiffness k=94.8n·m -1 of one coil of spring.
The cylinder model is QGA II 40x75MF 2.
The foregoing detailed description of several embodiments of the invention has been presented for purposes of illustration and description, but is not intended to limit the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the present invention shall fall within the scope of the patent covered by this invention.
Claims (1)
1. The coupler device for the engineering truck, which is connected with the semipermanent traction rod for the subway, is characterized in that a sleeve (3) is arranged at one end, connected with the semipermanent traction rod (2), of the coupler device (1), and a connecting rod mechanism (4) for positioning the semipermanent traction rod (2) is arranged on the sleeve (3);
The sleeve (3) comprises a large inner diameter part (31) and a small inner diameter part (32) which are integrally connected, a transition shoulder (33) is formed at the joint of the large inner diameter part (31) and the small inner diameter part (32), two grooves (34) are relatively arranged in the large inner diameter part (31), and insertion holes are formed in the grooves (34);
The connecting rod mechanism (4) comprises a stop block (47), a first connecting rod (41), a second connecting rod (42), a third connecting rod (43), a fourth connecting rod (44), a piston rod (45) and a cylinder (46), wherein the stop block, the first connecting rod (41), the second connecting rod (42), the third connecting rod (43), the fourth connecting rod (44) and the cylinder (46) are sequentially connected, the first connecting rod (41) is perpendicular to the sleeve (3), the piston rod (45) is parallel to the sleeve (3), and the first connecting rod (41), the second connecting rod (42), the third connecting rod (43), the fourth connecting rod (44) and the piston rod (45) are sequentially connected in a rotating mode;
The connecting rod mechanism (4) is also provided with a supporting rod (49), the supporting rod (49) is arranged in parallel with the first connecting rod (41), one end of the supporting rod (49) is fixedly connected with the outer wall of the sleeve (3), and the other end of the supporting rod is rotatably connected with the middle part of the third connecting rod (43);
the first connecting rod (41) is positioned in the jack and fixedly connected with the stop block (47); the stop block (47) is positioned in the groove (34), a spring (48) is arranged between the stop block (47) and the inner wall of the groove (34), and the spring (48) is sleeved on the first connecting rod (41);
The outer side wall of the semi-permanent traction rod (2) is provided with a stepped boss structure, the stop block is provided with a stop block shoulder structure, and the stop block shoulder and the transition shoulder in the sleeve form a stepped shoulder structure matched with the stepped boss structure together;
The outer side wall of the semi-permanent traction rod (2) is provided with a continuous first-stage boss (21) and a continuous second-stage boss (22), the stop block (47) is provided with a first-stage shoulder (47 a) and a second-stage shoulder (47 b), when the coupler device (1) is in a connecting and hanging state, the first-stage boss (21) is positioned between the transition shoulder (33) and the first-stage shoulder (47 a), and the second-stage boss (22) is in abutting connection with the second-stage shoulder (47 b);
The surface of the first-stage shoulder (47 a) opposite to the first-stage boss (21) is a small inclined surface (47 c) of a stop block, and the other surface of the stop block (47) opposite to the small inclined surface (47 c) of the stop block is a large inclined surface (47 d) of the stop block;
The first connecting rod (41) and the stop block (47) are fixed in a welding way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811074423.2A CN109050568B (en) | 2018-09-14 | 2018-09-14 | Coupling device for coupling engineering truck with semipermanent traction rod for subway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811074423.2A CN109050568B (en) | 2018-09-14 | 2018-09-14 | Coupling device for coupling engineering truck with semipermanent traction rod for subway |
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| Publication Number | Publication Date |
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| CN109050568A CN109050568A (en) | 2018-12-21 |
| CN109050568B true CN109050568B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811074423.2A Active CN109050568B (en) | 2018-09-14 | 2018-09-14 | Coupling device for coupling engineering truck with semipermanent traction rod for subway |
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| CN110539772B (en) * | 2019-09-24 | 2024-03-05 | 苏国安 | Automatic hooking and unhooking mechanism, automatic hooking and unhooking device of mine car and mine car |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1387113A (en) * | 1963-02-07 | 1965-01-29 | Whiting Corp | Coupling for locotractors |
| CN87204682U (en) * | 1987-10-12 | 1988-12-14 | 中国有色金属工业总公司长沙公司黄沙坪铝锌矿 | Auto-hitching and separating device of mine car |
| US6131752A (en) * | 1998-09-17 | 2000-10-17 | Mcconway & Torley Corporation | Bearing block for lightweight drawbar assembly |
| CN2698670Y (en) * | 2004-05-09 | 2005-05-11 | 中国北车集团四方车辆研究所 | Tight-lock coupler damping device |
| CN103287451A (en) * | 2013-06-19 | 2013-09-11 | 中国人民解放军军事交通学院 | Traction device for road-rail dual-purpose vehicle |
| CN204775269U (en) * | 2015-07-24 | 2015-11-18 | 北京铁路局丰台车辆段 | Automatic device of seting out of railway freight car circuit |
| CN205059631U (en) * | 2015-10-22 | 2016-03-02 | 晋西装备制造有限责任公司 | Automatic connecting device of coupling for passenger train |
| CN105416333A (en) * | 2015-12-08 | 2016-03-23 | 南车长江车辆有限公司 | Coupling device for rail-road vehicle |
| CN105437892A (en) * | 2015-12-22 | 2016-03-30 | 常州市瑞泰工程机械有限公司 | Traction device of road-railer |
| CN205468351U (en) * | 2016-02-17 | 2016-08-17 | 杭州南车城市轨道交通车辆有限公司 | Special coupling connecting device of combined car of ZAGRO |
| CN106801696A (en) * | 2016-12-28 | 2017-06-06 | 重庆市鹏舟机械厂 | A kind of fixator |
| CN208789699U (en) * | 2018-09-14 | 2019-04-26 | 天津电力机车有限公司 | A kind of automobile-used coupler device even hung with subway with semipermanent draw bar of engineering |
-
2018
- 2018-09-14 CN CN201811074423.2A patent/CN109050568B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1387113A (en) * | 1963-02-07 | 1965-01-29 | Whiting Corp | Coupling for locotractors |
| CN87204682U (en) * | 1987-10-12 | 1988-12-14 | 中国有色金属工业总公司长沙公司黄沙坪铝锌矿 | Auto-hitching and separating device of mine car |
| US6131752A (en) * | 1998-09-17 | 2000-10-17 | Mcconway & Torley Corporation | Bearing block for lightweight drawbar assembly |
| CN2698670Y (en) * | 2004-05-09 | 2005-05-11 | 中国北车集团四方车辆研究所 | Tight-lock coupler damping device |
| CN103287451A (en) * | 2013-06-19 | 2013-09-11 | 中国人民解放军军事交通学院 | Traction device for road-rail dual-purpose vehicle |
| CN204775269U (en) * | 2015-07-24 | 2015-11-18 | 北京铁路局丰台车辆段 | Automatic device of seting out of railway freight car circuit |
| CN205059631U (en) * | 2015-10-22 | 2016-03-02 | 晋西装备制造有限责任公司 | Automatic connecting device of coupling for passenger train |
| CN105416333A (en) * | 2015-12-08 | 2016-03-23 | 南车长江车辆有限公司 | Coupling device for rail-road vehicle |
| CN105437892A (en) * | 2015-12-22 | 2016-03-30 | 常州市瑞泰工程机械有限公司 | Traction device of road-railer |
| CN205468351U (en) * | 2016-02-17 | 2016-08-17 | 杭州南车城市轨道交通车辆有限公司 | Special coupling connecting device of combined car of ZAGRO |
| CN106801696A (en) * | 2016-12-28 | 2017-06-06 | 重庆市鹏舟机械厂 | A kind of fixator |
| CN208789699U (en) * | 2018-09-14 | 2019-04-26 | 天津电力机车有限公司 | A kind of automobile-used coupler device even hung with subway with semipermanent draw bar of engineering |
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|---|---|
| CN109050568A (en) | 2018-12-21 |
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