Transition coupler and coupling method therefor

Abstract

The present application provides a rescue coupler and coupling method therefor; the rescue coupler comprises: a coupler body, including a first coupling end and a coupler rear end; the first coupling end is configured to couple with a train coupler and includes a second coupling face; a second coupler hook, arranged on the coupler body, and configured to couple with a first coupling link of the train coupler; and a second coupling link, arranged on the coupler body; wherein, the second coupler hook and the second coupling link are arranged on two sides of the coupler body respectively; a length of the second coupling link is configured to be able to cross the second coupling face to couple with the first coupler hook of the train coupler; the first coupling end includes an upper coupling face and a lower coupling face arranged at intervals up and down, and they are connected via a coupler body bracket; and the coupler body bracket includes an arc-shaped segment recessed from the first coupling end side to the coupler rear end side.

Description

[0001] The present application claims the priority benefits of Chinese application No. 2024109983971, filed on July 24, 2024, entitled "Rescue Coupler and Coupling Method Therefor", Chinese application No. 2024109983990, filed on July 24, 2024, entitled "Rescue Coupler and Coupling Method Therefor", and Chinese application No. 2024217625659, filed on July 24, 2024, entitled "Rescue Coupler"; the entireties of which are hereby incorporated by reference.TECHNICAL FIELD

[0002] The present application relates to the technical field of rail transit, and relates to a rescue coupler and coupling method therefor.BACKGROUND ART

[0003] A rescue coupler refers to a device for realizing coupling couplers of different coupler head types or mounting height, and is a common component of a locomotive and a train. The rescue coupler can be used as a rescue coupler; when a train breaks down during operation, a set of rescue coupler that is reliably connected to an existing formal train coupler is required for rescue, and the train will be dragged to a safe place. The existing rescue couplers mainly include a 10-type rescue coupler, a 330-type rescue coupler, a 40-type rescue coupler, etc., with many types of components, large weight, and a very labor-consuming coupling operation. There are universal rescue couplers in the prior art, which can be adapted to connect various types of train couplers. However, on the one hand, due to the structural fixation of the universal rescue coupler, it is difficult to adapt to the refined differences between different types of train couplers; and on the other hand, due to the complex structure of the rescue coupler, it is usually large in size, large in weight and inconvenient for the coupling operate with the train coupler. For example, Chinese patent CN214929731U discloses a structure of a rescue coupler, comprising a coupler head, wherein the coupler head comprises a male cone part, a concave hole part, a coupler hook plate, a coupling link and the like, wherein the male cone part is matched with a female cone of a train coupler, and the concave hole part is matched with the male cone of the train coupler. Chinese patent CN203558079U, CN215244872U, etc. also disclose the similar structure. The above rescue couplers have complex structures, many coupler body components, heavy overall weight, and inconvenient coupling operations.SUMMARY OF THE INVENTION

[0004] To address some of the problems in the prior art, the present application provides a rescue coupler and a coupling method for therefor; the specific technical solution is described as follows: A rescue coupler, comprising: a coupler body: including a first coupling end and a coupler rear end; the first coupling end is configured to couple with a train coupler, and includes a second coupling face; a second coupler hook: arranged on the coupler body, and configured to couple with a first coupling link of the train coupler; and a second coupling link: arranged on the coupler body; wherein, the second coupler hook and the second coupling link are arranged on two sides of the coupler body respectively; a length of the second coupling link is configured to be able to cross the second coupling face to couple with a first coupler hook of the train coupler; the first coupling end includes an upper coupling face and a lower coupling face arranged at intervals up and down, and the upper coupling face and the lower coupling face are connected via a coupler body bracket; and the coupler body bracket includes an arc-shaped segment recessed from the first coupling end side to the coupler rear end side.

[0005] More specifically: The rescue coupler provided in a first aspect of the present application comprises: the coupler body: including the first coupling end and the coupler rear end; the first coupling end is configured to couple with the train coupler, and includes the second coupling face; the coupler rear end is able to connected to a traction mechanism; the second coupler hook: arranged on the coupler body, and configured to couple with the first coupling link of the train coupler; a first mounting platform: arranged on the coupler body, and located between the first coupling end and the coupler rear end of the coupler body; and the second coupling link: detachably mounted on the first mounting platform; wherein, the second coupler hook and the second coupling link are arranged on the two sides of the coupler body; the length of the second coupling link is configured so that when mounted on the first mounting platform, the second coupling link is able to cross the second coupling face to couple with the first coupler hook of the train coupler; the first coupling end includes the upper coupling face and the lower coupling face arranged at intervals up and down, and the upper coupling face and the lower coupling face are connected via the coupler body bracket; and the coupler body bracket includes the arc-shaped segment recessed from the first coupling end side to the coupler rear end side.

[0006] In one embodiment, the second coupler hook is fixedly mounted on the coupler body, unable to rotate.

[0007] In one embodiment, the coupler body is further provided with a second mounting platform; the second mounting platform is located on the same side of the first mounting platform, and is arranged in a direction close to the first coupling end of the coupler body relative to the first mounting platform; the rescue coupler further comprises a coupling link stop rod, the stop rod is detachably mounted on the second mounting platform; and after the second coupling link is mounted on the first mounting platform and the stop rod is mounted on the second mounting platform, the stop rod is located at an outside of the second coupling link.

[0008] In one embodiment, the second coupling link includes a mounting end and a second coupling end; an insertion slot is formed on the mounting end, the insertion slot is mounted on the first mounting platform by insertion; the second coupling link and the first mounting platform are fixed by a fixing member; and a coupling opening is formed on the second coupling end, and the first coupler hook of the train coupler is able to couple at the coupling opening.

[0009] In one embodiment, the second mounting platform includes a third mounting platform and a fourth mounting platform arranged at intervals up and down, the third mounting platform and the fourth mounting platform are provided with insertion holes opposite to each other, and the stop rod is inserted and installed between the insertion holes of the third mounting platform and the fourth mounting platform; in a longitudinal direction, the first mounting platform is located between the third mounting platform and the fourth mounting platform.

[0010] In one embodiment, a reinforcing rib is provided between the arc-shaped segment and the coupler rear end.

[0011] In one embodiment, the arc-shaped segment is a concave hollow structure, forming a concave groove with an opening facing the first coupling end, and the upper coupling face and the lower coupling face spaced apart from each other are oppositely located at two ends of the arc-shaped segment.

[0012] In one embodiment, a notch is formed on the upper coupling face and the lower coupling face respectively, and when the rescue coupler is connected with the train coupler, the notches are aligned with an air pipe connector of the first coupling face of the train coupler.

[0013] In one embodiment, the first mounting platform is arranged on the coupler body bracket at a rear side of the arc-shaped segment, and the second coupler hook is arranged on a first edge of the arc-shaped segment.

[0014] In one embodiment, the third mounting platform and the fourth mounting platform are arranged along a second edge of the arc-shaped segment. The second edge is arranged opposite to the first edge.

[0015] A second aspect of the present application provides a coupling method for a rescue coupler, adopting the rescue coupler described in any one of the above embodiments, and the coupling method comprises the following steps: contacting the first coupling end of the rescue coupler with a first coupling face of the train coupler; moving the rescue coupler, so that the second coupler hook of the rescue coupler is coupled to the first coupling link of the train coupler; rotating the first coupling end of the rescue coupler to completely fit with the first coupling face of the train coupler; coupling the second coupling link of the rescue coupler with the first coupler hook of the train coupler; and rotating the second coupling link of the rescue coupler, and fixing the second coupling link on the first mounting platform.

[0016] In one embodiment, the coupling method further comprises the following steps: mounting the stop rod after the second coupling link of the rescue coupler is fixed on the first mounting platform.

[0017] Compared with the prior art, the beneficial effects of the present application are as follows: (1) As for the rescue coupler provided in at least one embodiment of the present application, the overall parts are designed as detachable structures, which simplifies the structure of the coupler head, makes the coupler structure compact, is simple and reliable to operate, is light in weight, and is easy to carry. It can be connected to the train coupler by manual operation, meeting the needs of high-speed train rescue and rescued, and can reduce the difficulty and cost of rescue. (2) In the rescue coupler provided in at least one embodiment of the present application, the coupler body thereof is an arc-shaped structure and can be designed as a plate structure, which greatly simplifies the coupler body structure of the rescue coupler, reduces the weight of the rescue coupler, facilitates the coupling operation, and thus ensures the coupling operation time. (3) In the rescue coupler provided in at least one embodiment of the present application, the coupling link thereof is designed as a detachable structure; the rescue coupler adopts a rotating connection method, which is easy to operate and has strong flexibility. The design of the stop rod ensures the stability of the coupling between the rescue coupler and the train coupler.

[0018] The rescue coupler provided in a third aspect of the present application, more specifically, comprises: the coupler body: including the first coupling end and the coupler rear end; the first coupling end is configured to couple with the train coupler, and includes the second coupling face; the second coupler hook: arranged on the coupler body, and configured to couple with the first coupling link of the train coupler; and the second coupling link: being an integral structure with the coupler body; wherein, the second coupler hook and the second coupling link are arranged on the two sides of the coupler body; the length of the second coupling link is configured to be able to cross the second coupling face to couple with the first coupler hook of the train coupler; the first coupling end includes the upper coupling face and the lower coupling face arranged at intervals up and down, and the upper coupling face and the lower coupling face are connected via the coupler body bracket; the coupler body bracket includes the arc-shaped segment recessed from the first coupling end side towards the coupler rear end side.

[0019] In one embodiment, the second coupler hook is fixedly arranged on the coupler body, being unable to rotate.

[0020] In one embodiment, a stop pin is mounted on the coupler body at a side where the second coupler hook is located, and a mounting position of the stop pin is configured as: after the first coupling link of the train coupler is coupled with the second coupler hook of the rescue coupler, the stop pin is located at an outside the first coupling link of the train coupler, to limit the rotation of the first coupling link.

[0021] In one embodiment, a mounting plate of the stop pin is provided on the coupler body at the side where the second coupler hook is located, including an upper mounting plate located above the second coupler hook and a lower mounting plate located below the second coupler hook; an opening hole is respectively provided on the upper mounting plate and the lower mounting plate; and the stop pin passes through the opening holes of the upper mounting plate and the lower mounting plate, and is fixed.

[0022] In one embodiment, the coupler body is provided with a coupling plate, the second coupler hook is formed on a side of the coupling plate facing the coupler rear end.

[0023] In one embodiment, a side of the coupling plate facing the second coupling face is an inclined surface; and the inclined surface is inclined from a side close to the second coupling link of the rescue coupler to an outer side of the rescue coupler, and towards a side close to the coupler rear end.

[0024] In one embodiment, the arc-shaped segment of the coupler body forms an arc-shaped plate, and the coupler rear end and the arc-shaped segment are an integral structure. More specifically, the arc-shaped segment is a concave hollow structure, forming a concave groove with an opening facing the first coupling end, and the upper coupling face and the lower coupling face spaced apart from each other are oppositely located at two ends of the arc-shaped segment.

[0025] In one embodiment, the stop pin is mounted at a side wall of the arc-shaped segment; and the upper mounting plate and the lower mounting plate are symmetrically mounted relative to a symmetry axis of the arc-shaped segment at an upper side and lower side of the symmetrical axis.

[0026] Among them, as for the rescue coupler provided in the first aspect and the rescue coupler provided in the third aspect, some technical solutions thereof can be reasonably borrowed from each other, so they are not repeated.

[0027] A fourth aspect of the present application provides a coupling method for a rescue coupler, which is used for coupling the rescue coupler with a train coupler, and the coupling method comprises the following steps: pulling an uncoupling handle of the train coupler, and rotating the first coupler hook of the train coupler, so that the first coupler hook of the train coupler is coupled with the second coupling link of the rescue coupler; and releasing the uncoupling handle of the train coupler, so that the first coupling link of the train coupler is coupled with the second coupler hook of the rescue coupler.

[0028] In one embodiment, the coupling method further comprises: during a coupling process of the first coupling link of the train coupler with the second coupler hook of the rescue coupler, the first coupling link of the train coupler is in contact with the inclined surface of the coupling plate, moves to a rear side of the coupling plate along the inclined surface, and is coupled with the second coupler hook of the rescue coupler.

[0029] Compared with the prior art, the beneficial effects of the present application are as follows: (1) The rescue coupler provided in at least one embodiment of the present application is an integrated structure, and the main shaft, coupling link, shaft pin, etc. of a traditional rescue coupler are designed as one or omitted, and only two parts of the integrated coupler and the stop pin, can realize the connection function of the rescue coupler, simplifying the structure of the rescue coupler and meeting the lightweight requirements. (2) The coupler body of the rescue coupler provided in at least one embodiment of the present application is an arc-shaped structure, and can be designed as a plate structure, which greatly simplifies the structure of the coupler body of the rescue coupler, reduces the weight of the rescue coupler, facilitates the coupling operation, and thus can ensure the coupling operation time. (3) In the rescue coupler provided in at least one embodiment of the present application, the coupling link and the coupler body thereof are welded together, without relative movement, non-detachable, simple in structure, and no need of daily maintenance and oiling. (4) As for the rescue coupler provided in at least one embodiment of the present application, the stop pin thereof is used to block the coupling link of the formal coupler, which can effectively prevent it from coming out and avoid uncoupling. (5) The rescue coupler provided in at least one embodiment of the present application adopts a sliding coupling method, which is simple to operate and can be coupled and uncoupled by one person.BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings to be used in the illustration of the embodiments or the prior art are briefly introduced as below; and obviously, the drawings in the following illustration are merely some embodiments of the present application, and for a person skilled in the art, other drawings may be obtained according to these drawings without creative work. FIG. 1 is a schematic structural diagram of a coupler body of a rescue coupler according to an embodiment; FIG. 2 is a schematic structural diagram of the rescue coupler; FIG. 3 is a schematic structural diagram of an alignment state of the rescue coupler with a first coupling face of a 330-type coupler; FIG. 4 is a cross-sectional view of the alignment state of the rescue coupler with the first coupling face of the 330-type coupler; FIG. 5 is a schematic diagram of a coupling process of a second coupling link of the rescue coupler with a first coupler hook of the 330-type coupler; FIG. 6 is a schematic diagram of a coupling in place state of the second coupling link of the rescue coupler with the first coupler hook of the 330-type coupler; FIG. 7 is a schematic diagram of a coupling in place state of the rescue coupler with the 330-type coupler; FIG. 8a is a schematic diagram of a first state of a 40-type coupler; FIG. 8b is a schematic diagram of a second state of the 40-type coupler; FIG. 9 is a schematic diagram of a rescue coupler at a first viewing angle according to another embodiment; FIG. 10 is a schematic diagram of the rescue coupler at a second viewing angle; FIG. 11 is a schematic diagram of the rescue coupler at a third viewing angle; FIG. 12a is a schematic diagram of a first coupling state of the rescue coupler with the 40-type coupler; FIG. 12b is a schematic diagram of a second coupling state of the rescue coupler with the 40-type coupler; FIG. 12c is a schematic diagram of a third coupling state of the rescue coupler with the 40-type coupler; FIG. 12d is a schematic diagram of a fourth coupling state of the rescue coupler with the 40-type coupler; FIG. 13 is a schematic diagram of a coupling in place state of the rescue coupler with the 40-type coupler; wherein, 1 train coupler, 101 first coupler head, 102 first coupler rear position, 103 first coupling face, 104 male cone, 105 female cone, 106 coupler head housing, 107 coupler hook plate, 108 first coupler hook, 110 first coupling link, 111 air pipe connector, 112 uncoupling handle; 2 rescue coupler, 201 coupler body, 202 first coupling end, 203 coupler rear end, 204 second coupling face, 205 coupler rear pivot pin, 206 second coupler hook, 207 arc-shaped recess, 208 second coupling link, 209 first mounting platform, 210 first through hole, 211 two sides of the coupler body, 212 second through hole, 213 first rotating pin, 214 spring clip of the rotating pin, 215 mounting end, 216 second coupling end, 217 insertion slot, 218 coupling opening, 219 third coupling link, 220 fourth coupling link, 221 fifth coupling link, 222 coupler play, 223 second mounting platform, 224 stop rod, 225 third mounting platform, 226 fourth mounting platform, 227 insertion hole, 228 upper coupling face, 229 lower coupling face, 230 coupler body bracket, 231 arc-shaped segment, 232 plate structure, 233 reinforcing rib, 234 notch, 235 first edge, 236 second edge, 237 concave groove, 238 stop pin, 239 mounting plate of the stop pin, 240 upper mounting plate, 241 lower mounting plate, 242 opening hole, 243 coupling plate, 244 inclined surface, X symmetrical axis. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The technical solutions of the present application will be described in detail below in combination with specific embodiments. However, it should be understood that elements, structures and features in one embodiment may also be advantageously incorporated into other embodiments without further description.

[0032] In the description of the present application, it should be noted that terms such as "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying the relative importance, or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features.

[0033] In the description of the present application, it should be noted that the terms "up", "down", "bottom", "inside" and the like indicate the positional or positional relationship according to the positional relationship shown in FIG. 1, merely for the convenience of describing the present application and the simplified description, but do not indicate or imply a devices or an element referred to must be of a particular orientation, constructed and operated in a particular orientation and therefore should not be construed as limiting the present application.

[0034] In the description of the present application, it should be noted that the terms "connect", "connecting" and "connected" should be understood in a broad sense unless otherwise clearly specified and limited. For example, they might be fixed connection, detachable connection, or integrated connection; might be direct connection or indirect connection through an intermediate medium, and might be internal connection of two elements. For those of ordinary skilled in the art, the specific meanings of the above-mentioned terms in the present application can be understood under specific circumstances.

[0035] As shown in FIGs. 1-7, a first embodiment of the present application provides a rescue coupler 2, which may be used as a rescue coupler for coupling with a train coupler 1 (also referred as a formal coupler) in a vehicle rescue operation. The rescue coupler 2 is generally connected between a rescue vehicle (having a traction mechanism capable of providing power) and a to-be-rescued vehicle, and the coupler of the to-be-rescued vehicle is the train coupler 1. The rescue coupler 2 is suitable for coupling with a train coupler 1 with a coupler hook plate and a coupling link, for example, a 330-type coupler. In this embodiment, an adaptation application of the rescue coupler with the 330-type coupler is used as an example to illustrate the structure of the rescue coupler and the coupling step. The terms involved in this embodiment: formal coupler and train coupler both refer to couplers on a formal vehicle, and when the formal vehicle needs to be rescued, it is also referred as the to-be-rescued vehicle.

[0036] In order to facilitate understanding of the technical solutions of the present application, firstly, the structure of the 330-type coupler as the train coupler 1 is briefly described. Referring to FIG. 3 and FIG. 4, the 330-type coupler (train coupler 1) includes a first coupler head 101 and a first coupler rear position 102, wherein the first coupler rear position 102 side is used to connect to a vehicle end (i.e. the formal vehicle). A first coupling face 103 is formed at the first coupler head 101, and when two 330-type couplers are connected to each other, the first coupling faces 103 are opposite to each other. A convex male cone 104 and a concave female cone 105 are formed at the first coupling face 103 of the 330-type coupler. A coupler head housing 106 is formed at the first coupler head, and a coupler hook plate 107 is mounted in the coupler head housing 106, the coupler hook plate 107 is able to rotate relative to the first coupler head 101, and also can be externally connected to an uncoupling handle 112. The coupler hook plate 107 of the 330-type coupler rotates by pulling the uncoupling handle112. More specifically, an arc-shaped recess structure is formed on a side of the coupler hook plate 107 to serve as a first coupler hook 108, being able to couple with a coupling link of other matched coupler (such as a rescue coupler); a first coupling link 110 of the 330-type coupler is connected on another side of the coupler hook plate 107, which is able to couple with a coupler hook of the other matched coupler. As described in the background art, the 330-type coupler is a train coupler in the prior art, and only some brief introductions are made above.

[0037] The train coupler 1 used in the present embodiment is the 330-type coupler, therefore, the 330-type coupler in the following of the embodiment corresponds to the train coupler 1. However, it does not limit the application scenario of the rescue coupler of the present application, and the rescue coupler can also be applied to other types of train couplers with a coupler hook plate and a coupling link.

[0038] The structure of the rescue coupler 2 of the present embodiment will be described in detail as below.

[0039] Referring to FIG. 1 and FIG. 2, a coupler body 201 of the rescue coupler 2 includes a first coupling end 202 and a coupler rear end 203 disposed opposite to each other; wherein, the first coupling end 202 is configured to couple with an adapting coupler (such as a train coupler) and has a second coupling face 204; the coupler rear end 203 is configured to connect to an external rescue vehicle (not shown in the figures), and includes a coupler rear pivot pin 205. When coupled with a coupler of a to-be-rescued vehicle (such as the train coupler), the second coupling face 204 of the rescue coupler is in contact with the first coupling face 103 of the 330-type coupler of the to-be-rescued vehicle.

[0040] Generally, coupling is performed between couplers by coupler hook plates and coupling links. For the two couplers to be connected, the coupler hook plate of the first coupler is coupled to the coupling link of the second coupler, and the coupling link of the first coupler is coupled to the coupler hook plate of the second coupler.

[0041] The coupler body 201 of the rescue coupler is provided with a second coupler hook 206. The second coupler hook 206 is arranged on the coupler body 201, and an arc-shaped recess 207 of the second coupler hook 206 faces the coupler rear end 203 side and is configured to couple with the first coupling link 110 of the train coupler 1 (330-type coupler). As shown in FIGs. 1, 2, 4 and 5, the second coupler hook 206 is fixed on the coupler body 201 and is unable to rotate; and in some embodiments, the second coupler hook 206 can be integrally cast with the coupler body 201. In the prior art, each coupler hook is located on a coupler hook plate, is connected to a spring, and is a rotatable structure. Therefore, the second coupler hook in the present embodiment is simpler in structure and higher in reliability.

[0042] As shown in FIG. 2 and FIG. 6, the rescue coupler 2 is further provided with a second coupling link 208; different from the structure of the rescue coupler in the prior art, the second coupling link 208 is designed as a pluggable structure in the embodiment. The coupler body 201 is provided with a coupling link mounting platform, that is, a first mounting platform 209, located on a side wall of a middle part of the coupler body 201 between the first coupling end 202 and the coupler rear end 203. Specifically, the first mounting platform 209 is a plate-shaped structure disposed on the side wall of the coupler body 201, and a first through hole 210 is provided thereon for inserting a fixing member (such as a first rotating pin 213 as described below).

[0043] The second coupling link 208 is detachably mounted on the first mounting platform 209. The second coupler hook 206 and the second coupling link 208 are arranged on two sides 211 of the coupler body 201; that is, respectively located on two opposite sides 211 of the coupler body 201 (see FIG. 4). The second coupling link 208 is provided with a second through hole 212; when the second coupling link 208 needs to be fixed to the first mounting platform 209, the first through hole 210 and the second through hole 212 are aligned, and a coupling link rotating pin (i.e. first rotating pin 213) is inserted therein; a size of one end of the first rotating pin 213 is larger than a size of the second through hole, and after the other end passes through the second through hole 212, a spring clip of the rotating pin 214 is installed thereon to prevent the second coupling link 208 from moving out. A length of the second coupling link 208 is configured such that after mounted on the first mounting platform 209, the second coupling link 208 is able to cross over the second coupling face 204 of the rescue coupler and be stably connected to the first coupler hook 108 of the train coupler (330-type coupler). The first rotating pin 213 selected as the fixing member in the embodiment may of course also be other structures, such as a detachable structure of a support column, a rod, etc.

[0044] In an initial state, the second coupling link 208 and the coupler body 201 of the rescue coupler 2 are two independent components, and the second coupling link 208 is not installed. When the coupling operation is performed, the second coupling link 208 is coupled to the first coupler hook 108 of the 330-type coupler, then the second coupling link 208 is fixed on the first mounting platform 209.

[0045] In some embodiments, the second coupling link 208 is shaft connected with the first mounting platform 209, and is able to rotate in a direction between the first coupling end 202 and the coupler rear end 203 relative to a shaft joint of the second coupling link 208 and the first mounting platform 209; and the second coupling link 208 is connected to the first coupler hook 108 of the 330-type coupler during rotation.

[0046] In a specific embodiment, as shown in FIG. 2, the second coupling link 208 includes a mounting end 215 and a second coupling end 216; wherein an insertion slot 217 is formed on the mounting end 215, the insertion slot 217 is mounted on the the first mounting platform 209 by insertion, and the second coupling link 208 and the first mounting platform 209 are fixed by a first rotating pin 213. A coupling opening 218 is formed on the second coupling end 216, and the first coupler hook 108 of the train coupler (330-type coupler) can be hooked at the coupling opening 218. More specifically, the second coupling link 208 includes a third coupling link 219 and a fourth coupling link 220 arranged along a length direction, the two are approximately parallel and equal in length, and the two coupling links 219, 220 are connected through a fifth coupling link 221 along a width direction to form the coupling opening 218. A second through hole 212 is provided at a non-connecting end of the third coupling link 219 and at a non-connecting end of the fourth coupling link 220 respectively. A coupler play 222 between the third coupling link 219 and the fourth coupling link 220 is designed according to the thickness of the first mounting platform 209, so that the first mounting platform 209 can be accommodated in the coupler play 222 between the two coupling links.

[0047] As the second coupling link 208 and the coupler body 201 are designed to be a detachable structure, there is a risk that the second coupling link 208 will fall off from the first mounting platform 209, and there is also a risk that the second coupling link 208 rotates relative to the first mounting platform 209, causing the connection to be unhooked. In order to solve this problem, as shown in FIG. 1 and FIG. 2, the coupler body 201 is further provided with a mounting platform of a coupling link stop rod, that is, a second mounting platform 223; the second mounting platform 223 is located at the same side of the first mounting platform 209, and is arranged in a direction close to the first coupling end 202 of the coupler body relative to the first mounting platform 209. The rescue coupler 2 further includes the coupling link stop rod 224, detachably mounted on the second mounting platform 223. After the second coupling link 208 is mounted on the first mounting platform 209 and the stop rod 224 is mounted on the second mounting platform 223, the stop rod 224 is located at an outer side of the second coupling link 208 to limit the movement of the second coupling link 208 (referring to FIG. 2 and FIG. 7).

[0048] More specifically, the second mounting platform 223 is mounted on an outside wall of the coupler body 1, and comprises a third mounting platform 225 and a fourth mounting platform 226 arranged at intervals up and down; the third mounting platform 225 and the fourth mounting platform 226 are oppositely provided with insertion holes 227, and the stop rod 224 is inserted and mounted between the insertion hole 227 of the third mounting platform 225 and the insertion hole 227 of the fourth mounting platform 226; in a longitudinal direction, the first mounting platform 209 is located between the third mounting platform 225 and the fourth mounting platform 226. When the rescue coupler and the 330-type coupler are coupled, the stop rod 224 is mounted in the insertion hole 227 to ensure that the second coupling link 208 is stabilized in the first coupler hook 108 of the 330-type coupler.

[0049] Similar to the structure of the first mounting platform 209, the third mounting platform 225 and the fourth mounting platform 226 of the second mounting platform are also plate-shaped structures, and the insertion holes 227 are located at an outer side of the first through hole 210, so that the stop rod 224 is located at the outer side of the second coupling link 208 after being mounted on the second mounting platform 223.

[0050] As mentioned above, the 330-type coupler has the male cone 104 and the female cone 105. For cooperation, a second coupling face of a rescue coupler in the prior art also has a female cone and a male cone, so that the overall area of the second coupling face is large, thus the overall volume and weight of the rescue coupler are large. In order to solve this problem, as shown in FIG. 1 and FIG. 2, the first coupling end 202 of the coupler body in this embodiment includes an upper coupling face 228 and a lower coupling face 229 arranged at intervals up and down (i.e., the second coupling face 204 are divided into the upper coupling face 228 and the lower coupling face 229 spaced apart from each other); and the upper coupling face 228 and the lower coupling face 229 are connected via a coupler body bracket 230. A side of the coupler body bracket 230 facing the first coupling end 202 has a concave arc-shaped segment 231, i.e., the arc-shaped segment 231 is regarded as a part of the coupler body bracket 230. As described herein, the "concave" refers that the coupler body bracket 230 is recessed from the first coupling end 202 toward the coupler rear end 203 side. The coupler rear end 203 and the arc-shaped segment 231 of plate structure 232 may be an integrally formed structure.

[0051] More specifically, as shown in FIG. 1, the arc-shaped segment 231 is a concave hollow structure, forming a concave groove 237 with an opening facing the first coupling end 202 side, the upper coupling face 228 and the lower coupling face 229 spaced apart from each other are located at an upper end and a lower end of the arc-shaped segment 231 oppositely. There are only the upper coupling face 228 and the lower coupling face 229 at the opening of the concave groove 237.

[0052] In an embodiment, a ratio of a lateral length of the arc-shaped segment 231 to a lateral length of the coupler body 201 is not less than 30%, for example, may be 35%, 40%, and so on. The ratio of the lateral length of the arc-shaped segment 231 to the lateral length of the coupler body bracket 230 is not less than 50%, for example, 50%, 52%, 54%, 55%, 58%, 60%, and so on. The "lateral" is shown as the left-right direction in FIGS. 1 and FIG. 2. On the premise of ensuring the strength of the rescue coupler, the proportion of the concave groove is as high as possible, so that the rescue coupler is lightweight.

[0053] The overall height of the second coupling face 204 (i.e., the sum of the height of the upper coupling face and the height of the lower coupling face) does not exceed 30% of the overall height of the coupler body 201, for example, 25%, 20% and so on. The width of the second coupling face 204 (the front-rear direction in FIG. 1) does not exceed 50% of the width of the first coupling face 103 of the train coupler 1, for example, 45%, 40%, 35%, 30%, and so on. These settings can allow the rescue coupler to have small size and light weight at a higher degree.

[0054] The width of the arc-shaped segment 231 is approximately equal to the width of the upper coupling face 228 and the width of the lower coupling face 229, and the width is much smaller than the overall width of the first coupling face 103 of the 330-type coupler, so that the overall weight of the rescue coupler can be reduced, and interference with the male cone 104 of the train coupler can be avoided. The coupler body 201 after the arc-shaped segment 231 and adjacent to the coupler rear end 203 side, has the coupler body bracket 230 with a plate-shaped structure, which can be used as a reinforcing rib 233 to improve the overall stability of the rescue coupler. The width of the reinforcing rib 233 is smaller than the width of the upper coupling face 228 and the width of the lower coupling face 229. During connection, the upper coupling face 228 and the lower coupling face 229 are attached to the first coupling face of the 330-type coupler. The concave groove of the arc-shaped segment 231 is adjacent to the male cone 104 of the 330-type coupler, but does not interfere with the male cone 104. Such a structure can reduce the overall volume of the rescue coupler to the greatest extent and reduce the weight of the rescue coupler. In order to reduce weight, a plurality of lightening holes may also be designed on the arc-shaped segment 231 of the coupler body.

[0055] In some embodiments of the present application, a notch 234 is formed at a middle portion of the upper coupling face 228 and a middle portion of the lower coupling face 229 respectively, and the notches 234 are matched with the air pipe connector 111 of the 330-type coupler, so as to avoid interference between the rescue coupler and the duct connector of the train coupler in the coupling process.

[0056] In some embodiments of the present application, the first mounting platform 209 is disposed on the coupler body bracket 230 at a rear side of the arc-shaped segment 231, that is, located on the plate-shaped structure of the coupler body bracket 230; the second coupler hook 206 is disposed on the first edge 235 of the arc-shaped segment 231; and the third mounting platform 225 and the fourth mounting platform 226 are disposed along the second edge 236 of the arc-shaped segment 231. The first edge 235 and the second edge 236 are located on two opposite sides of the arc-shaped segment 231, and the second coupler hook 206 and the second mounting platform 223 are disposed substantially oppositely relative to the arc-shaped segment 231, as shown in FIG. 1.

[0057] A side of the arc-shaped segment 231 facing the 330-type coupler forms a structure of the concave groove 237, and when the second coupling link 208 of the rescue coupler is rotated to connect to the 330-type coupler, interference with the 330-type coupler can be avoided.

[0058] The present application greatly simplifies the structure of the rescue coupler, and particularly provides a detachable rescue coupler. The rescue coupler can meet the use requirements of urban rail trains, and adopts a method of converting a multi-part structure of a coupler hook plate, a coupling link, a coupling link pin shaft and so on in the coupling composition into single-part structures, so that light weight of the rescue coupler is achieved, and the rescue coupler can be coupled with the train coupler through manual operation, thus the requirement for rescue of the train is met.

[0059] A second embodiment of the present application provides a coupling method for a rescue coupler with a 330-type coupler, which adopts the rescue coupler according to the first embodiment, and the coupling method includes the following steps. contacting the first coupling end 202 of the rescue coupler with the first coupling face 103 of the 330-type coupler; in an initial contact state, complete attachment of the coupling faces is not achieved between the two couplers, but a side of the rescue coupler where the second coupler hook 206 is located is attached to the first coupling face 103 of the 330-type coupler, and the rescue coupler is in an inclined state relative to the 330-type coupler; moving the rescue coupler such that the second coupler hook 206 of the rescue coupler is coupled with the first coupling link 110 of the 330-type coupler; rotating the first coupling end 202 of the rescue coupler to completely attach with the first coupling face 103 of the 330-type coupler; coupling the second coupling link 208 of the rescue coupler with the first coupler hook 108 of the 330-type coupler; rotating the second coupling link 208 of the rescue coupler, and fixing the second coupling link 208 on the first mounting platform 209.

[0060] In some embodiments, the coupling method further includes the following step: mounting the stop rod 224 after the second coupling link 208 of the rescue coupler is fixed on the first mounting platform 209.

[0061] Further in combination with the specific structure of the rescue coupler, the specific coupling method of the rescue coupler is described as follows.

[0062] Coupling process, the rescue coupler 2 is manually operated to achieve the coupling process with the 330-type coupler; as shown in FIG. 3, the upper coupling face 228 and the lower coupling face 229 of the rescue coupler 2 are in contact with the first coupling face 103 of the 330-type coupler, and at the same time, the rescue coupler 2 is horizontally moved, so that the fixed second coupler hook 206 of the rescue coupler 2 slides into a stop column at an end of the first coupling link 110 of the 330-type coupler, as shown in FIG. 4. The coupler body 201 of the rescue coupler is rotated clockwise and continued to move towards the male cone 104 side of the 330-type coupler, and the stop column at the end of the first coupling link 110 of the 330-type coupler completely enters the arc-shaped recess 207 of the second coupler hook 206 of the rescue coupler (FIG. 5), and then the coupler body 2 of the rescue coupler is rotated counterclockwise to re-contact the first coupling face 103 of the 330-type coupler to complete the coupling of the second coupler hook 206 of the rescue coupler. Subsequently, the detachable second coupling link 208 of the rescue coupler 2 is manually operated, a cylindrical end (the second coupling end 216) of the detachable second coupling link 208 is hung in a groove of the first coupler hook 108 of the 330-type coupler, another end (the mounting end 215) is hinged with the first mounting platform 209 on the coupler body through the first rotating pin 213, and the spring clip of the rotating pin 214 is inserted into a positioning hole of the first rotating pin 213 to prevent from coming out, as shown in FIG. 6. Subsequently, the stop rod 224 is manually inserted into the third and fourth mounting platforms 225, 226 to limit and stop the detachable second coupling link 208 from rotating, and a spring clip is inserted into the stop rod 224 to prevent it from coming out, so that the coupling of the rescue coupler 2 and the 330-type coupler is completed, as shown in FIG. 7.

[0063] Uncoupling process: the uncoupling process of the rescue coupler 2 and the 330-type coupler is a reverse operation process of the coupling process. That is, firstly, the spring clip is pulled out from the stop rod 224, then the stop rod 224 is removed from the third and fourth mounting platform, and then the spring clip of the rotating pin 214 is pulled out of the coupler body 201, the second coupling link 208 can be removed from the groove of the first coupler hook 108 of the 330-type coupler, and then the rescue coupler 2 is rotated clockwise to horizontally move the rescue coupler 2, so that the fixed second coupler hook 206 of the rescue coupler slides out of the stop column at the end of the first coupling link 110 of the 330-type coupler. So far, the uncoupling process of the rescue coupler 2 and the 330-type coupler is completed.

[0064] As shown in FIGs. 8-13, the present application further provides another rescue coupler and a coupling method for the rescue coupler, which is suitable for coupling with a train coupler with a coupler hook plate and a coupling link, for example, a 40-type coupler. In the following embodiments, an adaptation application of the rescue coupler with the 40-type coupler is used as an example to illustrate the structure of the rescue coupler and the coupling step. Similarly, the terms involved: formal coupler and train coupler both refer to couplers on a formal vehicle, and when the formal vehicle needs to be rescued, it is also referred as the to-be-rescued vehicle.

[0065] The application status of the 40-type coupler in the prior art is as follows: tram-train is a a kind of mixed-use transportation vehicle used in foreign countries, this type of vehicle does not require high strength about the rescue coupler, but has extremely strict requirements for lightweight, and 40-type couplers are widely used. When the tram-train is rescued, a 40-type rescue coupler needs to be used, but the traditional rescue coupler is too heavy, cannot meet the requirements of single-person operation, and also has the disadvantage of complex operation steps. Different from the conventional 330-type coupler commonly used in domestic subway vehicles, 40-type coupler has different principles and structural features. When the coupler is in a to-be-connected position (also connected position), the first coupling link of the 40-type coupler extents out of the male cone, while the first coupling link of the 330-type coupler retracts into the male cone of the coupler; the arc-shaped recess of the first coupler hook of the 40-type coupler faces the rear side of the coupler body, a guide plate is further installed on the side wall of the coupler body, while the arc-shaped recess of the first coupler hook of the 330-type coupler faces the side of the coupler body. As described in the background art, the 40-type coupler is also a train coupler in the prior art.

[0066] To facilitate understanding of the technical solutions of the present application, firstly, the structure of the 40-type coupler is briefly described. FIG. 8a and FIG. 8b are two state diagrams of the 40-type coupler. The 40-type coupler includes a first coupler head 101 and a first coupler rear position 102, wherein the first coupler rear position 102 side is used to connect to a vehicle end (a formal vehicle). A first coupling face 103 is formed at the first coupler head 101, and when two 40-type couplers are connected to each other, the first coupling faces 103 are opposite to each other. A male cone 104 and a female cone 105 are formed at the first coupling face 103 of the 40-type coupler (see FIG. 13). A coupler head housing 106 is formed at the first coupler head, and a coupler hook plate 107 is mounted in the coupler head housing 106. The coupler hook plate 107 is able to rotate relative to the first coupler head 101, and also can be externally connected to an uncoupling handle 112. The coupler hook plate 107 of the 40-type coupler rotates by pulling the uncoupling handle112. More specifically, an arc-shaped recess structure is formed on a side of the coupler hook plate 107 to serve as a first coupler hook 108, being able to couple with a coupling link of other matched coupler (such as a rescue coupler); a first coupling link 110 of the 40-type coupler is connected on another side of the coupler hook plate 107, which is able to couple with a coupler hook of the other matched coupler. FIG. 8a shows an uncoupling state diagram of the train coupler 1, and FIG. 8b shows a coupling state diagram of the train coupler 1.

[0067] A third embodiment of the present application provides a rescue coupler for the 40-type coupler, which is used in a vehicle rescue operation and can be connected to a to-be-rescued vehicle adopting a 40-type coupler. However, the rescue coupler of the present application is not limited to couple with the 40-type coupler, and can also be other types of train coupler.

[0068] The structure of the rescue coupler 2 of the present embodiment will be described in detail as below.

[0069] As shown in FIGs. 9-11, the coupler body 201 of the rescue coupler 2 includes a first coupling end 202 and a coupler rear end 203 disposed opposite to each other; the first coupling end 202 is configured to couple with an adapting coupler (such as a train coupler), and has a second coupling face 204; the coupler rear end 203 is configured to connect to an external rescue vehicle (not shown in the figures), and comprises a coupler rear pivot pin 205. When coupled with a coupler of a to-be-rescued vehicle (such as the train coupler), the second coupling face 204 of the rescue coupler is in contact with the first coupling face 103 of the train coupler 1 of the to-be-rescued vehicle.

[0070] As a rescue coupler, the coupler body 201 of the rescue coupler 2 is provided with a second coupler hook 206, and the second coupler hook 206 is disposed on the coupler body 201 facing a side of the coupler rear end 203, and is configured to couple with the first coupling link 110 of the 40-type coupler. Similarly, the second coupler hook 206 is fixed on the coupler body 201 and is not rotatable; therefore, it is unnecessary to arrange a spring connected to the second coupler hook 206 to drive the second coupler hook 206 to rotate.

[0071] The rescue coupler 2 is further provided with a second coupling link 208; the second coupling link 208 and the coupler body 201 are of an integrated structure, and they are not detachable; that is, in the present embodiment, the second coupling link 208 is fixedly mounted on the coupler body 201.

[0072] The second coupler hook 206 and the second coupling link 208 are arranged on two sides 211 of the coupler body 201; that is, respectively located on two opposite sides 211 of the coupler body 201; and a length of the second coupling link 208 is configured to be able to cross the second coupling face 204 of the coupler body 201 to be connected with the first coupler hook 108 of the 40-type coupler.

[0073] In the above structures, both the second coupler hook 206 and the second coupling link 208 may be of an integrated structure with the coupler body 201, and the whole rescue coupler is a non-detachable structure, which is convenient to transport and maintain.

[0074] As the first coupling link 110 is in an extended state in the coupling state of the 40-type coupler, a portion of the coupler body located outside the 40-type coupler is relatively long, and it is easy to have an unstable state in connection with the second coupler hook of the rescue coupler. In order to solve this problem, in some embodiments of the present application, a stop pin 238 is mounted on the coupler body 201 at a side where the second coupler hook 206 is located (referring to FIG. 13), and a mounting position of the stop pin 238 is configured as: after the first coupling link 110 of the 40-type coupler is connected with the second coupler hook 206 of the rescue coupler, the stop pin 238 is located at an outer side of the first coupling link 110, to limit the rotation of the first coupling link 110 and prevent it from coming out from the second coupler hook 206 of the rescue coupler.

[0075] In addition, in order to solve the mounting problem of the stop pin 238, in some embodiments, a mounting plate 239 of the stop pin is provided on the coupler body 201 at the side where the second coupler hook 206 is located, including an upper mounting plate 240 located above the second coupler hook 206 and a lower mounting plate 241 located below the second coupler hook 206; an opening hole 242 is respectively formed on the upper mounting plate 240 and the lower mounting plate 241, and the stop pin 238 passes through the openings holes 242 of the upper mounting plate 240 and the lower mounting plate 241, and is fixed. The stop pin 238 is a detachable structure; when the rescue coupler 2 is connected with the 40-type coupler, the stop pin 238 is installed; and when the coupling of the two couplers needs to be released, the stop pin 238 is removed.

[0076] In order to construct the structure of the second coupler hook 206, in some embodiments of the present application, the coupler body 201 is provided with a coupling plate 243, the second coupler hook 206 is arranged on a side of the coupling plate 243 facing the coupler rear end 203, and is an arc-shaped recess structure machined on the coupling plate 243; and the arc-shaped recess faces a side where the coupler rear end 203 of the rescue coupler is located.

[0077] One feature of the 40-type coupler is that the first coupling link 110 of the 40-type coupler is in an extended state in the coupling state. The second coupler hook 206 of the rescue coupler faces the coupler rear end 203 of the rescue coupler, opposite to the direction where the first coupling link 110 of the 40-type coupler is located, and the first coupling link 110 needs to go around to the rear of the coupling plate 243 to connect with the rescue coupler. However, the coupling plate 243 is located on a movement path of the first coupling link 110 and disturb the movement of the first coupling link 110. In order to solve this technical problem, in some embodiments, a side of the coupling plate 243 facing the second coupling face 204 of the rescue coupler, also a side of the coupling plate 243 facing the first coupling link 110, forms an inclined surface 244; and the inclined surface 244 is inclined from a side close to the second coupling link 208 of the rescue coupler to an outer side of the rescue coupler, towards a side close to the coupler rear end 203. The inclined surface 244 has a guiding effect, and when the 40-type coupler couples with the rescue coupler 2, the first coupling link 110 is in contact with the inclined surface 244 and moves along the inclined surface 244, and when moving to an outer edge of the inclined surface 244, the first coupling link 110 goes around the coupling plate 243 and connects with the second coupler hook 206.

[0078] In the prior art, a second coupling face of the rescue coupler used to connect with the 40-type coupler also has a female cone and a male cone, so that the overall area of the second coupling face is large, thus the overall volume and weight of the rescue coupler are large. In order to solve this problem, the first coupling end 202 of the coupler body in this embodiment includes an upper coupling face 228 and a lower coupling face 229 arranged at intervals up and down (i.e., the second coupling face 204 are divided into the upper coupling face 228 and the lower coupling face 229 spaced apart from each other); and the upper coupling face 228 and the lower coupling face 229 are connected via a coupler body bracket 230; and the coupler body bracket 230 forms a concave arc-shaped segment 231 from the first coupling end 202 side to the coupler rear end 203 side. As described herein, the "concave" refers that the coupler body bracket 230 is recessed from the first coupling end 202 toward the coupler rear end 203 side. The coupler rear end 203 and the arc-shaped segment 231 of plate structure 232 may be an integrally formed structure. This structure greatly simplifies the structure of the coupler head, so that the weight of the coupler head is lighter. In order to improve the stability of the structure, a reinforcing rib 233 is arranged between the coupler rear end 203 and the arc-shaped segment 231, which can be regarded as a part of the coupler body bracket 230.

[0079] More specifically, as shown in FIGs. 9-11, the arc-shaped segment 231 is a concave hollow structure, forming a concave groove 237 with an opening facing the first coupling end 202; and the upper coupling face 228 and the lower coupling face 229 spaced apart from each other are located at an upper end and a lower end of the arc-shaped segment 231 oppositely.

[0080] In an embodiment, a ratio of a lateral length of the arc-shaped segment 231 to a lateral length of the coupler body 201 is not less than 30%, for example, may be 35%, 40%, and so on. The ratio of the lateral length of the arc-shaped segment 231 to the lateral length of the coupler body bracket 230 is not less than 50%, for example, 50%, 52%, 54%, 55%, 58%, 60%, and so on. The "lateral" is shown as the left-right direction in FIG. 10. On the premise of ensuring the strength of the rescue coupler, the proportion of the concave groove is as high as possible, so that the rescue coupler is lightweight.

[0081] The overall height of the second coupling face 204 (i.e., the sum of the height of the upper coupling face and the height of the lower coupling face) does not exceed 30% of the overall height of the coupler body 201, for example, 25%, 20% and so on. The width of the second coupling face 204 (the front-rear direction in FIG. 10) does not exceed 50% of the width of the first coupling face 103 of the train coupler 1, for example, 45%, 40%, 35%, 30%, and so on. These settings can allow the rescue coupler to have small size and light weight at a higher degree.

[0082] The width of the arc-shaped segment 231 is substantially equal to the width of the upper coupling face 228 and the width of the lower coupling face 229, and the width is much smaller than the overall width of the first coupling face 103 of the 40-type coupler, so that the overall weight of the rescue coupler can be reduced, and interference with the male cone 104 of the train coupler can be avoided. The concave groove of the arc-shaped segment 231 is adjacent to the male cone 104 of the 40-type coupler; however, the width of the arc-shaped segment ensures that the rescue coupler does not interfere with the male cone of the train coupler. Such a structure can reduce the overall volume of the rescue coupler to the greatest extent and reduce the weight of the rescue coupler. In order to reduce weight, a plurality of lightening holes may also be designed on the arc-shaped segment 231 of the coupler body.

[0083] In some embodiments, a notch 234 is formed at a middle portion of the upper coupling face 228 and a middle portion of the lower coupling face 229 respectively, and the notches 234 are matched with the air pipe connector 111 of the 40-type coupler, so as to avoid interference between the rescue coupler and the duct connector of the train coupler in the coupling process.

[0084] Further, the arc-shaped segment 231 is a regular circular arc, the coupler rear end 203 is located at a symmetrical dividing position of the arc-shaped segment, and is installed towards the rear side, and the two are welded into a whole. The second coupling link 208 of the rescue coupler is mounted on a first side of the symmetrical dividing position, and the second coupler hook 206 is disposed on a second side opposite to the first side; in other words, the second coupler hook 206 and the second coupling link 208 are substantially oppositely disposed relative to the arc-shaped segment 107 or the coupler body bracket 230. This arrangement can ensure a uniform symmetry of the rescue coupler. The stop pin 238 is mounted on a side wall of the arc-shaped segment of the coupler body, and the upper mounting plate 240 and the lower mounting plate 241 are symmetrically mounted on an upper side and a lower side of a symmetry axis X along the symmetry axis X of the arc-shaped segment of the coupler body.

[0085] This embodiment provides a lightweight integrated rescue coupler, which can meet a lightweight requirement. The coupling process can be operated by a single person, has a simple operation mode, has a safety pin structure, and can prevent accidental uncoupling.

[0086] A fourth embodiment of the present application provides a coupling method for a rescue coupler with a 40-type coupler, which is used for the coupling of the rescue coupler according to the third embodiment with the 40-type coupler, and the coupling method includes the following steps: pulling the uncoupling handle 112 of the 40-type coupler, and rotating the first coupler hook 108 of the 40-type coupler, so that the first coupler hook 108 of the 40-type coupler is connected with the second coupling link 208 of the rescue coupler; releasing the uncoupling handle 112 of the 40-type coupler, and the first coupler hook 108 of the 40-type coupler being rotated in an opposite direction under an action of a spring restoring force, so that the first coupling link 110 of the 40-type coupler is coupled with the second coupler hook 206 of the rescue coupler.

[0087] In some embodiments of the present application, the coupling method further includes: during a coupling process of the first coupling link 110 of the 40-type coupler with the second coupler hook 206 of the rescue coupler, the first coupling link 110 is in contact with the inclined surface 244 of the coupling plate 243, moves to the rear side of the coupling plate 243 along the inclined surface 244, and is coupled to the second coupler hook 206 of the rescue coupler.

[0088] In the following, the use method of the rescue coupler is further described from two aspects of coupling step and uncoupling step.

[0089] The coupling step: as shown in FIG. 12a, the uncoupling handle112 of the 40-type coupler is pulled, the coupler hook plate 107 is rotated clockwise, and a front end cylindrical head of the second coupling link 208 of the rescue coupler is placed into the arc-shaped recess of the coupler hook plate 107; as shown in FIG. 12b, the uncoupling handle 112 of the 40-type coupler is released, the coupler hook plate 107 is rotated counterclockwise under the action of the torsion spring, and the first coupling link 110 of the 40-type coupler acts on the inclined surface 244 of the coupling plate 243; as shown in FIG. 12c, the first coupling link 110 of the 40-type coupler swings to enter the arc-shaped recess at the rear side of the coupling plate 243; as shown in FIG. 12d, the stop pin 238 is inserted, and an R-shaped pin is mounted to fix the stop pin 238 to complete the coupling between the rescue coupler and the 40-type coupler.

[0090] The uncoupling step: the stop pin 238 is pulled out, and the first coupling link 110 of the 40-type coupler is rotated clockwise to rotate out of the arc-shaped recess of the coupling plate 243; the uncoupling handle 112 of the 40-type coupler is pulled, and the front end cylindrical head of the second coupling link 208 of the rescue coupler is taken out from the arc-shaped recess of the 40-type coupler. The uncoupling is completed.

[0091] The embodiments are only described as preferred embodiments of the present application, and are not intended to limit the scope of the present application. Various modifications and improvements made on the technical solutions of the present application by ordinary skilled in the art without departing from the design spirit of the present application shall fall within the protective scope confirmed by the claims of the present application.

Claims

1. A rescue coupler, wherein, comprising: a coupler body, including a first coupling end and a coupler rear end; the first coupling end is configured to couple with a train coupler, and includes a second coupling face; a second coupler hook, arranged on the coupler body, and configured to couple with a first coupling link of the train coupler; and a second coupling link, arranged on the coupler body; wherein, the second coupler hook and the second coupling link are arranged on two sides of the coupler body respectively; a length of the second coupling link is configured to be able to cross the second coupling face to couple with a first coupler hook of the train coupler; the first coupling end includes an upper coupling face and a lower coupling face arranged at intervals up and down, and the upper coupling face and the lower coupling face are connected via a coupler body bracket; and the coupler body bracket includes an arc-shaped segment recessed from the first coupling end side to the coupler rear end side.

2. The rescue coupler according to claim 1, more specifically, comprising: the coupler body, including the first coupling end and the coupler rear end; the first coupling end is configured to couple with the train coupler, and includes the second coupling face; and the coupler rear end is able to connected to a traction mechanism; the second coupler hook, arranged on the coupler body, and configured to couple with the first coupling link of the train coupler; a first mounting platform, arranged on the coupler body, and located between the first coupling end and the coupler rear end of the coupler body; and the second coupling link, detachably mounted on the first mounting platform; wherein, the second coupler hook and the second coupling link are arranged on the two sides of the coupler body; the length of the second coupling link is configured so that when mounted on the first mounting platform, the second coupling link is able to cross the second coupling face to couple with the first coupler hook of the train coupler; the first coupling end includes the upper coupling face and the lower coupling face arranged at intervals up and down, and the upper coupling face and the lower coupling face are connected via the coupler body bracket; and the coupler body bracket includes the arc-shaped segment recessed from the first coupling end side to the coupler rear end side.

3. The rescue coupler according to claim 2, wherein, the coupler body is further provided with a second mounting platform; the second mounting platform is located on the same side of the first mounting platform, and is arranged in a direction close to the first coupling end of the coupler body relative to the first mounting platform; the rescue coupler further comprises a coupling link stop rod, the stop rod is detachably mounted on the second mounting platform; and after the second coupling link is mounted on the first mounting platform and the stop rod is mounted on the second mounting platform, the stop rod is located at an outer side of the second coupling link.

4. The rescue coupler according to claim 2, wherein, the second coupling link includes a mounting end and a second coupling end; an insertion slot is formed on the mounting end, the insertion slot is mounted on the first mounting platform by insertion; the second coupling link and the first mounting platform are fixed by a fixing member; and a coupling opening is formed on the second coupling end, and the first coupler hook of the train coupler is able to couple at the coupling opening.

5. The rescue coupler according to claim 3, wherein, the second mounting platform includes a third mounting platform and a fourth mounting platform arranged at intervals up and down, the third mounting platform and the fourth mounting platform are provided with insertion holes opposite to each other, and the stop rod is inserted and installed between the insertion holes of the third mounting platform and the fourth mounting platform; in a longitudinal direction, the first mounting platform is located between the third mounting platform and the fourth mounting platform; the first mounting platform is arranged on the coupler body bracket at a rear side of the arc-shaped segment; the second coupler hook is arranged on a first edge of the arc-shaped segment; and the third mounting platform and the fourth mounting platform are arranged along a second edge of the arc-shaped segment.

6. A coupling method for the rescue coupler according to any one of claims 2-5, comprising the following steps: contacting the first coupling end of the rescue coupler with a first coupling face of the train coupler; moving the rescue coupler, so that the second coupler hook of the rescue coupler is coupled to the first coupling link of the train coupler; rotating the first coupling end of the rescue coupler to completely fit with the first coupling face of the train coupler; coupling the second coupling link of the rescue coupler with the first coupler hook of the train coupler; and rotating the second coupling link of the rescue coupler, and fixing the second coupling link on the first mounting platform.

7. The rescue coupler according to claim 1, more specifically, comprising: the coupler body, including the first coupling end and the coupler rear end; the first coupling end is configured to couple with the train coupler, and includes the second coupling face; the second coupler hook, arranged on the coupler body, and configured to couple with the first coupling link of the train coupler; and the second coupling link, being an integral structure with the coupler body; wherein, the second coupler hook and the second coupling link are arranged on the two sides of the coupler body; the length of the second coupling link is configured to be able to cross the second coupling face to couple with the first coupler hook of the train coupler; the first coupling end includes the upper coupling face and the lower coupling face arranged at intervals up and down, and the upper coupling face and the lower coupling face are connected via the coupler body bracket; the coupler body bracket includes the arc-shaped segment recessed from the first coupling end side towards the coupler rear end side.

8. The rescue coupler according to claim 7, wherein, a stop pin is mounted on the coupler body at a side where the second coupler hook is located, and a mounting position of the stop pin is configured as: after the first coupling link of the train coupler is coupled with the second coupler hook of the rescue coupler, the stop pin is located at an outer side the first coupling link of the train coupler, to limit the rotation of the first coupling link.

9. The rescue coupler according to claim 8, wherein, a mounting plate of the stop pin is provided on the coupler body at the side where the second coupler hook is located, including an upper mounting plate located above the second coupler hook and a lower mounting plate located below the second coupler hook; an opening hole is respectively provided on the upper mounting plate and the lower mounting plate; and the stop pin passes through the opening holes of the upper mounting plate and the lower mounting plate, and is fixed; the coupler body is provided with a coupling plate, the second coupler hook is formed on a side of the coupling plate facing the coupler rear end; a side of the coupling plate facing the second coupling face is an inclined surface; and the inclined surface is inclined from a side close to the second coupling link of the rescue coupler to an outer side of the rescue coupler, and towards a side close to the coupler rear end.

10. The rescue coupler according to any one of claims 1-5 and 7-9, wherein, the second coupler hook is fixedly arranged on the coupler body, being unable to rotate.

11. The rescue coupler according to any one of claims 1-5 and 7-9, wherein, the arc-shaped segment of the coupler body forms an arc-shaped plate; the arc-shaped segment is a concave hollow structure, forming a concave groove with an opening facing the first coupling end, and the upper coupling face and the lower coupling face spaced apart from each other are oppositely located at two ends of the arc-shaped segment.

12. The rescue coupler according to any one of claims 1-5 and 7-9, wherein, a notch is formed on the upper coupling face and the lower coupling face respectively, and when the rescue coupler is coupled with the train coupler, the notches are aligned with an air pipe connector of the first coupling face of the train coupler; and a reinforcing rib is provided between the arc-shaped segment and the coupler rear end.

13. A coupling method for a rescue coupler, used for coupling the rescue coupler according to any one of claims 7-9 with the train coupler, wherein, the coupling method comprising: pulling an uncoupling handle of the train coupler, and rotating the first coupler hook of the train coupler, so that the first coupler hook is coupled with the second coupling link of the rescue coupler; and releasing the uncoupling handle of the train coupler, so that the first coupling link of the train coupler is coupled with the second coupler hook of the rescue coupler.

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