Transition car coupler and method of coupling

Abstract

The application provides a transition car coupler and an automatic coupling method thereof. The transition car coupler comprises a coupler head and a coupler tail. A coupling surface is formed on one side of the coupler head for coupling with a train coupler. A tongue structure is formed on the coupling surface for coupling with a tongue of the train coupler. A concave taper structure is formed on the coupling surface for accommodating a convex taper of the train coupler. The concave taper structure comprises a cavity formed from the coupling surface to the inside of the coupler head. The tongue of the transition car coupler is in contact with the tongue of the train coupler. When the transition car coupler and the train coupler are moved close to each other, the tongues of the two couplers are pressed against each other and guided to be coupled.

Description

Technical Field

[0001] This invention relates to the field of railway vehicle coupler technology, specifically to a transition coupler for use as a transition coupler and its coupling method. Background Technology

[0002] The transition coupler is used for vehicle rescue and is connected to the train's regular coupler.

[0003] Different train models and types use different types of official couplers. Furthermore, the structures of these official couplers differ. Current technology offers universal transition couplers that can be adapted to various types of official couplers. However, due to the fixed structure of these universal couplers, it's difficult to utilize the subtle differences between different train models. A better approach is to adapt to different official couplers, requiring the research and development of dedicated transition couplers. Domestic and international rail transit transition couplers include Type 10 transition couplers, Shibata-type transition couplers, and locomotive transition couplers.

[0004] For close-fitting couplers, there is currently no reliable transitional coupler for the BSI type official couplers. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems and to propose a transition coupler and its coupling method.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A transition coupler for coupling with a train coupler, the train coupler including a coupler head having a convex cone and a concave cone formed thereon, the transition coupler comprising: The hook head and the hook tail: The hook head has a connecting surface on the side that is connected to the train coupler, and the main body of the hook head is between the connecting surface and the hook tail. A hook tongue structure is formed on the coupling surface for coupling with the train coupler. A concave cone structure is formed on the coupling surface to accommodate the convex cone of the train coupler; the concave cone structure includes a cavity formed from the coupling surface into the body of the coupler head.

[0007] In some embodiments of the present invention, the hook tongue structure includes a convex cone formed on the connecting surface, and a hook tongue block is provided on the side of the convex cone facing the concave cone structure. The hook tongue block has an inclined surface, the wider end of the inclined surface is close to the connecting surface, and the edge of the inclined surface on the side close to the connecting surface tapers away from the concave cone structure to form a hook tongue.

[0008] In some embodiments of the present invention, the transition coupler includes a positioning structure that cooperates with the train coupler. The positioning structure includes a first positioning boss provided on the upper end surface of the bottom plate of the BSI coupler concave cone portion. The hook tongue structure includes a convex cone formed on the coupling surface, and a first auxiliary positioning block is provided on the lower end face of the convex cone; when the transition coupler is coupled with the train coupler, the first auxiliary positioning block cooperates with the train coupler.

[0009] In some embodiments of the present invention, the transition coupler includes a positioning structure that cooperates with the train coupler, the positioning structure comprising: A second auxiliary positioning block is provided on the lower end face of the concave conical structure cavity; when the transition coupler is coupled to the train coupler, the second auxiliary positioning block cooperates with the train coupler.

[0010] In some embodiments of the present invention, the transition coupler includes a positioning structure that cooperates with the train coupler, the positioning structure comprising: The concave cone structure of the transition coupler and the hook tongue structure form a stepped transition structure, and a stepped transition side is formed between the concave cone structure and the hook tongue structure. The concave cone structure side extends further below the hook head relative to the hook tongue. When the transition coupler is coupled with the train coupler, the stepped transition side cooperates with the train coupler.

[0011] In some embodiments of the present invention, the transition coupler includes a positioning structure that cooperates with the train coupler. The positioning structure includes an extension block disposed on the convex cone of the transition coupler facing the concave cone structure. When the transition coupler is coupled to the train coupler, the side of the extension block facing the concave cone structure cooperates with the side of the convex cone of the train coupler.

[0012] In some embodiments of the present invention, the shape of the cavity of the concave cone structure is adapted to the external shape of the convex cone structure of the train coupler.

[0013] In some embodiments of the present invention, the sidewall of the cavity on the side of the concave cone structure away from the hook tongue is formed with a concave notch extending toward the hook tail.

[0014] A method for coupling a transition coupler, applied to the transition coupler described above, includes the following steps: The tongue of the transition coupler fits into the tongue of the train coupler. As the transition coupler moves closer to the train coupler, the tongues of the two couplers press against each other, guiding the movement until the tongues of the two couplers are engaged.

[0015] In some embodiments of the present invention, the method for coupling the transition coupler further includes the following steps: During the process of connecting the transition coupler to the train coupler, the positioning structures of each group are matched and aligned.

[0016] Compared with the prior art, the beneficial effects of the transition coupler provided by the present invention are as follows: 1. This transition coupler can be used for close-fitting couplers, especially BSI type couplers, realizing the transition coupler for BSI type couplers from scratch both domestically and internationally.

[0017] 2. To adapt to the special hook tongue structure of couplers such as BSI couplers, a fixed hook tongue structure and a hook tongue guide structure were designed. Through the special guiding effect of the transition coupler, the rescue train and the rescued train can be automatically coupled, which meets the needs of rail transit train rescue and rescue, reduces the difficulty and cost of rescue, and ensures that the rescue time meets the requirements of railway passenger transport.

[0018] 3. A new method for automatic coupling of a transition coupler with single-sided compression was invented. With the cooperation of the fixed hook tongue and multiple positioning structures of the transition coupler, the automatic coupling of the transition coupler is realized. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a first-view structural diagram of the BSI coupler; Figure 2 This is a schematic diagram of the BSI coupler structure from a second perspective. Figure 3 This is a first-view structural diagram of the transition coupler; Figure 4 This is a schematic diagram of the second-view structure of the transition coupler; Figure 5 This is a schematic diagram of the third-view structure of the transition coupler; Figure 6 A schematic diagram of the fourth-view structure of the transition coupler; Figure 7 A schematic diagram of the connection structure between the transition coupler and the BSI coupler; Figure 8a A schematic diagram of the connection state between the transition coupler and the BSI coupler; Figure 8b Schematic diagram of the two-state connection between the transition coupler and the BSI coupler; Figure 9a A schematic diagram of the uncoupling state of the transition coupler and the BSI coupler; Figure 9b Schematic diagram of the transition coupler and BSI coupler uncoupling state 2; BSI coupler corresponding diagram markings: 1-Train BSI coupler head, 101-First connecting surface, 102-First convex cone, 103-First concave cone, 104-Train BSI coupler head body, 105-First cavity, 106-First positioning boss, 107-Second positioning boss, 108-Plate structure, 109-Third positioning boss; 2-Train BSI coupler tail, 3-Train BSI coupler tongue, 301-Couplet rod, 302-Couplet tongue, 303-First inclined surface; 4-Spring; 5-Unhook handle; The corresponding reference numerals for the transition coupler: 6-Transition coupler head body, 601-Second connecting surface, 602-Second cavity, 6021-Concave notch; 7-Transition coupler tail, 701-Connecting pin hole; 801-Second convex cone, 802-Hook tongue block, 803-Hook tongue, 804-Second inclined surface, 805-Weight reduction hole, 806-Extension block; 901 - First auxiliary positioning block, 902 - Second auxiliary positioning block, 903 - Stepped transition side. Detailed Implementation

[0021] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] In the description of this application, it should be noted that: the fixed connection described in this application can be a detachable fixed connection or an integrated fixed connection; the indication of orientation or positional relationship is based on the positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] The terms "first" and "second" are used only to describe the purpose and are not used to imply relative importance.

[0024] This invention provides a transition coupler and a method for coupling the transition coupler, applicable to coupling train couplers where the coupler tongue is inserted from the side of the coupler body, for example, it can be used for coupling BSI couplers. In this embodiment, a BSI coupler is used as an example to illustrate the structure and coupling method of the transition coupler. The terms used below, "formal coupler" and "train coupler," refer to the couplers on formal vehicles.

[0025] First, the structure of the train's BSI coupler is explained, referring to... Figure 1and Figure 2 .

[0026] The train BSI coupler includes a train BSI coupler head 1, one end face of which is a first connecting surface 101, and a first convex cone 102 and a first concave cone 103 are formed on one side of the first connecting surface 101. The rear end of the train BSI coupler head 1 is a train BSI coupler tail 2, and the train BSI coupler head body 104 is located between the train BSI coupler head 1 and the tail 2.

[0027] A first cavity 105 is formed on the hook body of the first convex cone 102 portion of the train BSI coupler. A train BSI coupler tongue 3 is installed within the first cavity 105. The train BSI coupler tongue 3 includes a tongue rod 301 and a tongue 302. The tongue rod 301 is connected to an uncoupling handle 5. When the uncoupling handle 5 is pulled, the overall movement of the train BSI coupler tongue 3 is controlled, and the tongue 302 extends from the opening of the cavity towards the second concave cone side. A spring 4 is installed on the tongue rod 301. During the pulling of the tongue rod 301, the spring 4 is compressed. After releasing the uncoupling handle 5, the spring 4 returns to its original length, and the tongue 302 extends.

[0028] In order to position the BSI coupler and the transition coupler, a positioning structure between the two is designed, which is described in detail below.

[0029] The bottom surface of the first concave cone 103 portion of the train BSI coupler has a plate-like structure 108 extending forward towards the coupler head. A first positioning boss 106 is located on the upper end face of the plate-like structure 108, and a second positioning boss 107 is located on the lower end face of the first convex cone 102. A stepped transition structure is formed between the plate-like structure 108 and the first convex cone 102; that is, the plate-like structure 108 extends further downward relative to the first convex cone 102, and the side end face of the stepped transition structure facing the first convex cone 102 is a stepped transition surface. On this side end face, a third positioning boss 109 is provided. Each of the above-mentioned positioning bosses is a protruding block structure formed relative to the corresponding end face.

[0030] The hook tongue 302 has a first inclined surface 303 on one side outside the hook head, which makes the head of the hook tongue 302 longer and forms a connecting hook.

[0031] The structure of the transition coupler provided by this invention is as follows, see reference. Figures 3 to 7 .

[0032] The transition coupler includes a transition coupler head and a transition coupler tail 7. The side of the transition coupler head that is coupled to the train's BSI coupler forms a second coupling surface 601. The body of the transition coupler head 6 is located between the second coupling surface 601 and the transition coupler tail 7. The transition coupler tail 7 is provided with a coupling pin hole 701. The body of the transition coupler head 6 is provided with a weight-reducing hole 805.

[0033] A transition coupler tongue structure is formed on the second coupling surface 601 for coupling with the train BSI coupler tongue 3 of the train BSI coupler. A second concave cone is formed on the second coupling surface 601 to accommodate the first convex cone 102 of the BSI coupler to be coupled, i.e., the convex cone of the BSI coupler in this embodiment; the second concave cone includes a second cavity 602 formed from the second coupling surface 601 into the interior of the transition coupler head body.

[0034] During coupling operation, align the second coupling surface 601 of the transition coupler with the first coupling surface 101 of the train BSI coupler, pull the uncoupling handle 5 of the train BSI coupler, and after the hook tongue of the transition coupler and the hook tongue 302 of the train BSI coupler are aligned and coupled, release the uncoupling handle 5 to complete the coupling.

[0035] In some embodiments of the present invention, the hook tongue structure of the transition coupler is as follows.

[0036] The hook tongue structure includes a second convex cone 801 formed on the second connecting surface 601, the second convex cone 801 forming a protruding structure relative to the second connecting surface 601. A hook tongue block 802 is provided on the side of the second convex cone 801 facing the second concave cone, the hook tongue block 802 forming a second inclined surface 804, the wider end of the second inclined surface 804 being close to the second connecting surface 601, the edge of the second inclined surface 804 on the side close to the second connecting surface 601 contracting towards the side away from the second concave cone, this contraction structure forming a structure similar to a latch, forming a hook tongue 803.

[0037] During coupling, the second coupling surface 601 of the transition coupler is aligned with the first coupling surface 101 of the train BSI coupler. The uncoupling handle 5 of the train BSI coupler is pulled, aligning the second inclined surface 804 of the transition coupler with the first inclined surface 303 of the BSI coupler, their inclinations matching. Through the engagement of the two inclined surfaces, the hook head of the transition coupler and the hook tongue of the BSI coupler are pressed together, guiding each other, and the spring 4 is compressed. Guided by the inclined surfaces, the coupling is completed once the hook tongues of the transition coupler and the hook tongues of the BSI coupler 302 are aligned.

[0038] In some embodiments of the present invention, the hook tongue structure includes a second convex cone 801 formed on the connecting surface, and a first auxiliary positioning block 901 is provided on the lower end surface of the second convex cone 801, which is a protrusion formed relative to the lower end surface of the second convex cone 801.

[0039] During the coupling process between the transition coupler and the train BSI coupler, the second convex cone 801 of the transition car head extends into the first concave cone 103 of the formal BSI coupler, and the first auxiliary positioning block 901 cooperates with the first positioning boss 106. That is, the two protruding blocks abut against each other, and the limiting positioning between the two couplers is completed on the first side in the vertical direction.

[0040] In some embodiments of the present invention, a second auxiliary positioning block 902 is provided on the lower end face of the second cavity 602, which is a protrusion formed relative to the cavity surface of the second concave cone.

[0041] During the coupling process between the transition coupler and the formal BSI coupler, the first convex cone 102 of the formal coupler extends into the second cavity 602 of the transition coupler. The second positioning boss 107 below the first convex cone of the train BSI coupler cooperates with the second auxiliary positioning block 902 of the transition coupler. That is, the two protrusions abut against each other, and the limiting positioning between the two couplers is completed on the second side in the vertical direction.

[0042] In some embodiments of the present invention, the second concave cone and the hook tongue structure form a stepped transition structure, the bottom surface of the second cavity 602 extends further below the hook head relative to the bottom surface of the hook tongue block 802, and a stepped transition side 903 is formed between the second concave cone and the hook tongue of the transition coupler.

[0043] During the coupling process of the transition coupler and the train BSI coupler, when the transition coupler is coupled with the train BSI coupler, the stepped transition side 903 cooperates with the third positioning boss 903, that is, the stepped transition side 903 abuts against the third positioning boss 109, and completes the limiting positioning between the two couplers in the horizontal direction.

[0044] In some embodiments of the present invention, the second convex cone 801 of the transition coupler is provided with an extension block 806 facing the second cavity 602. When the transition coupler is coupled to the train BSI coupler, the side of the extension block 806 facing the second concave cone engages with the side of the first convex cone 102 of the train BSI coupler, that is, the two sides abut against each other. This allows for limiting and positioning between the two couplers in the horizontal direction.

[0045] By using the above four sets of positioning and uncoupling, the positioning between the transition coupler and the BSI coupler can be achieved from two directions in the horizontal dimension and two directions in the vertical dimension, respectively, ensuring the stability of the coupling of the two couplers.

[0046] Because the hook tongue structure of the BSI coupler is significantly different from that of other types of couplers, the uncoupling operation needs to be performed from the side of the coupler, and the uncoupling handle 5 occupies space on the side of the coupler. Therefore, during the coupling process with the BSI coupler, it is necessary to consider how the concave cone part of the transition coupler should cooperate with the uncoupling handle 5 to avoid affecting coupling interference.

[0047] The shape of the second cavity 602 of the transition coupler's second concave cone is adapted to the external shape of the structure of the BSI coupler's first convex cone 102, thus better adapting to the coupling of the BSI coupler's first convex cone 102. In this embodiment, the BSI coupler's first convex cone 102 is formed into an approximately conical uncoupling shape, and correspondingly, the second cavity 602 of the transition coupler's second concave cone is also formed into an approximately conical structure.

[0048] A concave notch extending towards the hook tail is formed on the side wall of the cavity on the side of the second concave cone of the transition coupler away from the hook tongue. Specifically, a concave notch 6021 is formed on the outer side of the second 602 of the transition coupler. During the coupling process between the transition coupler and the BSI coupler, the uncoupling handle 5 is located at the position of the concave notch 6021 to avoid interference between the movement of the second cavity 602 and the uncoupling handle 5.

[0049] In summary, the coupling process of the transition coupler and the BSI coupler is as follows.

[0050] The tongue of the transition coupler fits into the tongue of the BSI coupler. As the transition coupler and BSI coupler move closer, their tongues press against each other, guiding the movement until the tongues of the two couplers are engaged.

[0051] In some embodiments of the present invention, the coupling method further includes the following steps: during the coupling process between the transition coupler and the BSI coupler, the positioning structures of each group are matched relative to each other. The following section further details the principles of coupling and uncoupling of transition couplers and BSI couplers, based on the above-described coupling transition.

[0052] The principle of hooking / unhooking is as follows.

[0053] Compared to the BSI coupler, the transition coupler eliminates the telescopic movable coupler tongue and is designed with a fixed coupler tongue for uncoupling. During coupling, the second inclined surface 804 of the fixed coupler tongue 803 of the transition coupler presses against the side of the first inclined surface 303 of the coupler tongue of the BSI coupler. This compresses the positioning spring 4 of the BSI coupler, the movable compression spring 4 of the BSI coupler tongue, and guides the movement of the BSI coupler tongue 803 until the coupler tongues of the two couplers mesh with each other. After the coupler tongues 302 of the BSI coupler and the coupler tongues 803 of the transition coupler are coupled, the positioning spring 4 of the BSI coupler tongue returns to its original position, achieving coupling and locking of the two couplers. At this time, the second coupling surface 601 of the transition coupler is in contact with the first coupling surface 101 of the formal coupler.

[0054] With the four sets of positioning structures limiting the transition coupler and the BSI coupler, the transition coupler and the permanent coupler are engaged in place. When uncoupling the transition coupler, the hook tongue rod 301 is lifted by operating the BSI permanent coupler uncoupling handle 5, so that the hook tongues of the two couplers are separated from each other. Then, the two couplers are slowly pulled back, and the limiting platforms and coupling surfaces of the two couplers are separated, thus completing the uncoupling of the transition coupler.

[0055] The specific procedures for connecting and unhooking are further elaborated below.

[0056] Coupling process: The transition coupler approaches the official BSI coupler, such as... Figure 8a The guide cone 801 of the transition coupler guides the first concave cone 103 of the BSI coupler to each other, the guide concave cone cavity 601 of the transition coupler guides the first cone 102 of the BSI coupler to each other, the guide cone 801 of the transition coupler enters the concave cone cavity of the formal coupler, and similarly, the first cone 102 of the BSI coupler of the train enters the second cavity 602 of the transition coupler. As the two couplers continue to approach, the fixed hook tongue block 802 of the transition coupler presses against the hook tongue 302 of the BSI coupler, causing the hook tongue rod 301 of the BSI coupler to be pressed into the convex cone of the BSI coupler. When the coupling surfaces of the transition coupler and the BSI coupler are close to each other and about to fit together, the fixed hook tongue 802 of the transition coupler slides into the rear side of the BSI coupler hook tongue 3 of the BSI coupler. At this time, the coupling surfaces of the transition coupler and the BSI coupler are tightly fitted, and the BSI coupler hook tongue 3 of the BSI coupler is released from the pressure of the fixed hook tongue block 802 of the transition coupler and pops out. At this time, the coupling between the hook tongues of the transition coupler and the BSI coupler is achieved. Figure 8b As shown, under the four sets of positioning and uncoupling limits, the transition coupler and the regular coupler are connected in place.

[0057] Unhooking process: as follows Figure 9a As shown, by triggering the BSI coupler self-locking device, the BSI coupler's hook tongue 301 retracts into the BSI coupler's cone. At this point, the hook tongues of the transition coupler and the BSI coupler disengage from each other and lose their limiting position, thus completing the coupler uncoupling. After the two couplers are uncoupled, pulling the transition coupler backward will separate the transition coupler from the BSI coupler, as shown. Figure 9b As shown.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A transition coupler for coupling with a train BSI coupler, the train BSI coupler comprising a train BSI coupler head, the train BSI coupler head having a first convex cone and a first concave cone formed thereon, the first convex cone forming a first cavity, the first cavity having a train BSI coupler tongue installed thereon, the train BSI coupler tongue comprising a tongue rod and a tongue, wherein, The hook tongue rod is connected to the unhooking handle. When the unhooking handle is pulled, the overall movement of the hook tongue can be controlled. The hook tongue has a first inclined surface on one side outside the hook head. Its features are: The transition coupler includes: Transition coupler head and transition coupler tail: wherein, the transition coupler head forms a second coupling surface on the side where it is connected to the BSI coupler of the train, and the body of the transition coupler head is between the second coupling surface and the transition coupler tail. A transition coupler tongue structure is formed on the second coupling surface for coupling with the coupler tongue of the train BSI coupler; a second concave cone is formed on the second coupling surface for accommodating the first convex cone. The hook tongue structure of the transition coupler includes a second convex cone formed on the second coupling surface. A hook tongue block is provided on the side of the second convex cone facing the second concave cone. The hook tongue block forms a second inclined surface. The wider end of the second inclined surface is close to the second coupling surface. The edge of the second inclined surface on the side close to the second coupling surface tapers away from the second concave cone to form the hook tongue of the transition coupler. The second concave cone includes a second cavity formed inside the body of the transition coupler head from the second coupling surface; the side wall of the second cavity on the side of the second concave cone away from the transition coupler tongue has a concave notch extending in the direction of the hook tail. In this process, the second coupling surface of the transition coupler is aligned with the first coupling surface of the train BSI coupler. The uncoupling handle of the train BSI coupler is pulled, and the second inclined surface of the transition coupler tongue is aligned with the first inclined surface of the train BSI coupler tongue, with their inclinations matching. This causes the hook head of the transition coupler to press against the hook tongue of the train BSI coupler, moving under the guidance of the two inclined surfaces. Once the hook tongues of the transition coupler and the hook tongues of the train BSI coupler are aligned and coupled, the coupling is completed.

2. The transition coupler as described in claim 1, characterized in that, The transition coupler includes a positioning structure that mates with the train's BSI coupler, the positioning structure comprising: A first auxiliary positioning block is provided on the lower end face of the second convex cone; The train BSI coupler has a plate-like structure extending forward from the bottom of the first concave cone portion. On the upper surface of the plate-like structure, there is a first positioning boss. When the transition coupler is coupled to the train BSI coupler, the first auxiliary positioning block cooperates with the first positioning boss of the train BSI coupler.

3. The transition coupler as described in claim 1, characterized in that, The transition coupler includes a positioning structure that mates with the train's BSI coupler, the positioning structure comprising: A second auxiliary positioning block is provided on the lower end face of the second cavity of the second concave cone; When the transition coupler is coupled to the train BSI coupler, the second auxiliary positioning block cooperates with the train BSI coupler.

4. The transition coupler as described in claim 1, characterized in that, The transition coupler includes a positioning structure that mates with the train's BSI coupler, the positioning structure comprising: The second concave cone of the transition coupler and the hook tongue structure of the transition coupler form a stepped transition structure, and a stepped transition side is formed between the second concave cone and the hook tongue structure of the transition coupler. The second concave cone side extends further below the hook head relative to the hook tongue. When the transition coupler is coupled to the train BSI coupler, the stepped transition side engages with the train BSI coupler.

5. The transition coupler as described in claim 1, characterized in that, The transition coupler includes a positioning structure that mates with the train BSI coupler, the positioning structure including an extension block on the second convex cone of the transition coupler facing the second concave cone side; When the transition coupler is coupled to the train BSI coupler, the side of the extension block facing the second concave cone engages with the side of the first convex cone of the train BSI coupler.

6. The transition coupler as described in claim 1, characterized in that, The shape of the second cavity of the second concave cone is adapted to the external shape of the structure of the first convex cone.

7. A method for coupling a transition coupler, applied to the transition coupler described in any one of claims 2-5, characterized in that, Includes the following steps: The second inclined surface of the transition coupler is in contact with the first inclined surface of the train BSI coupler. As the transition coupler moves closer to the train BSI coupler, the coupler tongues of the two couplers press against each other, guiding the movement to the point where the coupler tongues of the two couplers are engaged.

8. The method for coupling the transition coupler as described in claim 7, characterized in that, It also includes the following steps: During the process of connecting the transition coupler to the train's BSI coupler: The first auxiliary positioning block of the transition coupler mates with the first positioning boss of the train BSI coupler, or... The second auxiliary positioning block of the transition coupler mates with the train's BSI coupler, or... The stepped transition side of the transition coupler mates with the BSI coupler of the train, or... The side of the extension block of the transition coupler facing the second concave cone mates with the side of the first convex cone of the train BSI coupler.

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