A folding guiding device for a coupler

Abstract

The present application discloses a folding guiding device for a coupler, which includes a support assembly fixedly arranged on the coupler; a guiding member rotatably connected to one end of the support assembly; a driving member connected to the other end of the support assembly; and a power output end of the driving member is rotatably connected to the guiding member. Wherein, under the driving action of the driving member, the guiding member is enabled to extend into place and lock or retract into place and lock. The technical problem in the prior art that the guiding member occupies a large space and the vehicle hood cannot be made compact is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle coupling, and particularly relates to a folding guiding device for a coupler. Background Art

[0002] A coupler is a vehicle component used to connect a locomotive and a vehicle or between vehicles, transmit traction force and impact force, and keep a certain distance between vehicles. A guiding member is installed on the coupler to increase the coupling guiding range of the coupler and improve the coupling performance of the coupler.

[0003] In the prior art, the guiding member and the coupler are usually rigidly connected, resulting in a large occupied space of the guiding member, making it impossible to achieve a compact design for the vehicle hood, and at the same time affecting the lightweight design of the vehicle hood. Summary of the Invention

[0004] The purpose of the present invention is to provide a folding guiding device for a coupler to solve the technical problem that the guiding device for the coupler in the prior art occupies a large space, resulting in the inability to achieve a compact design for the vehicle hood.

[0005] To achieve the above-mentioned invention purpose, the present invention adopts the following technical solutions:

[0006] A folding guiding device for a coupler, comprising:

[0007] A support assembly, which is fixedly arranged on the coupler;

[0008] A guiding member, which is rotatably connected to one end of the support assembly;

[0009] A driving member, which is connected to the other end of the support assembly; and the power output end of the driving member is rotatably connected to the guiding member;

[0010] Wherein, under the driving action of the driving member, the guiding member is extended in place or retracted in place.

[0011] Preferably, it further comprises:

[0012] A first connecting member, one end of which is rotatably connected to the guiding member, and the other end is rotatably connected to the power output end of the driving member;

[0013] A second connecting member, one end of which is rotatably connected to the coupler, and the other end is rotatably connected to the first connecting member and the power output end of the driving member, so that the first connecting member and the second connecting member rotate simultaneously under the action of the driving member.

[0014] Preferably, the support assembly comprises:

[0015] The first support member, which is fixedly arranged on the coupler; and the first support member includes a first support portion and a second support portion arranged opposite to each other, and the first support portion is rotationally connected to the guiding member;

[0016] The second support member, one end of which is connected to the second support portion and is arranged at an angle; and the second support member is rotationally connected to the driving member;

[0017] Wherein, through the connection among the guiding member, the driving member, the first connecting member, the second connecting member, the first support member and the second support member, a self-locking state can be formed when the guiding member extends in place; when the guiding member retracts in place, the driving member enters a self-locking state.

[0018] Preferably, the first support member and the guiding member are rotationally connected by arranging a first rotating member;

[0019] The first connecting member, the second connecting member and the power output end of the driving member are rotationally connected by arranging a second rotating member.

[0020] Preferably, a convex block is arranged on the guiding member, and the convex block is rotationally connected to the first connecting member.

[0021] Preferably, an adjusting assembly is further included, and the adjusting assembly includes

[0022] An elastic member, one end of which is fixedly connected to the coupler, and the other end of which is connected to the connection point of the first connecting member and the power output end of the driving member; when the driving member fails, it can prevent the guiding member from extending or retracting.

[0023] Preferably, the adjusting assembly further includes

[0024] A third support member, which is arranged on the coupler;

[0025] A third rotating member, which is arranged on the third support member, and through the third rotating member, the second connecting member is rotationally connected to the third support member;

[0026] A fourth support member, which is arranged on the third support member, and through the fourth support member, the elastic member is fixedly connected to the third support member.

[0027] Preferably, when the guiding member is in the extended state, the included angle between the second connecting member and the power output end of the driving member is α 1 , the included angle between the elastic member and the power output end of the driving member is α 2 , and α 1 <α 2 ;

[0028] When the guiding member is in the retracted state, the included angle between the second connecting member and the power output end of the driving member is α 3 , and the included angle between the elastic member and the power output end of the driving member is α 4 , and α 4 < α 3 .

[0029] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0030] In the present invention, a guiding member is rotatably arranged on a support assembly, and one end of the support assembly is connected to a driving member, and the power output end of the driving member is connected to the guiding member. Thus, under the driving action of the driving member, the guiding member is driven to perform a back-and-forth folding movement, that is, the telescoping of the guiding member is realized. Thus, by adopting the above structure, when the vehicles are coupled, the guiding member extends to the corresponding position, that is, under the driving action of the driving member, the guiding member extends to the place and is locked. When the coupling is completed, the guiding member retracts and is locked. Thus, the guiding member occupies a small space and has a compact structure. Thereby, the technical problem in the prior art that the large space occupied by the guiding member causes the vehicle hood to be unable to achieve a compact design is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the overall structural schematic diagram of the folding guiding device for a coupler in the present invention in the extended state;

[0032] Figure 2 is the overall structural schematic diagram of the folding guiding device for a coupler in the present invention in the retracted state;

[0033] Figure 3 is the schematic diagram of the principle of the folding guiding device for a coupler in the present invention in the extended state;

[0034] Figure 4 is the schematic diagram of the principle of the folding guiding device for a coupler in the present invention in the retracted state;

[0035] In the above figures: 1. Coupler; 2. First support member; 21. First support portion; 22. Second support portion; 3. Guiding member; 31. Protrusion; 4. Driving member; 5. Second support member; 6. First rotating member; 7. Second rotating member; 8. Adjusting assembly; 81. Elastic member; 82. Third support member; 83. Third rotating member; 84. Fourth support member; 9. First connecting member; 10. Second connecting member. DETAILED DESCRIPTION OF THE INVENTION

[0036] Hereinafter, the present invention will be specifically described by way of exemplary embodiments. However, it should be understood that without further narration, the elements, structures, and features in one embodiment can also be beneficially combined into other embodiments.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", "lower", "front", "rear", "first", "second", "third", "fourth", etc. is based on the positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] In the description of the present application, terms such as "installation", "connection", "coupling", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] The technical solution in the embodiment of the present application solves the technical problem in the prior art that the guiding device for the coupler occupies a large space, resulting in the inability to achieve a compact design for the vehicle hood. The general idea is as follows:

[0040] In the present invention, a guiding member is rotatably provided on a support assembly, and one end of the support assembly is connected to a driving member, and the power output end of the driving member is connected to the guiding member. Thus, under the driving action of the driving member, the guiding member is driven to perform a folding back-and-forth movement, that is, the telescoping of the guiding member is realized. By adopting the above structure, when the vehicles are coupled, the guiding member extends to the corresponding position, that is, under the driving action of the driving member, the guiding member extends to the place and is locked. When the coupling is completed, the guiding member retracts and is locked. Thus, the guiding member occupies a small space and has a compact structure. Thereby, the technical problem in the prior art that the guiding member occupies a large space, resulting in the inability to achieve a compact design for the vehicle hood, is solved.

[0041] To better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0042] A folding guiding device for a coupler 1, including,

[0043] A support assembly fixedly provided on the coupler 1;

[0044] A guiding member 3 rotatably connected to one end of the support assembly;

[0045] A driving member 4 connected to the other end of the support assembly; and the power output end of the driving member 4 is rotatably connected to the guiding member 2;

[0046] Wherein, under the driving action of the driving member 4, the guiding member 3 is extended or retracted in place.

[0047] As Figure 1 shown, the support assembly includes a first support assembly and a second support assembly. The first support member is fixedly arranged on the coupler; and the first support member includes a first support portion and a second support portion arranged oppositely, the first support portion is rotationally connected to the guiding member; one end of the second support member is connected to the second support portion and is arranged at an angle; and the second support member is rotationally connected to the driving member.

[0048] Specifically, the first support member 2 is arranged on the coupler 1 for supporting the guiding member 3 and the driving member 4; and the first support member and the guiding member are rotationally connected by arranging a first rotating member. Specifically, the first support member 2 includes a first support portion 21 and a second support portion 22, the first support portion 21 is arranged on the coupler, one end of the second support portion 22 is fixedly connected to the first support portion 21, and the other end extends towards the end away from the coupler connection surface; and the first support portion and the second support portion are coaxially and fixedly connected. Since the first support portion is stressed during the coupler guiding process, in order to make the first support portion receive uniform stress and be stably arranged on the coupler, in this embodiment, the cross-sectional width of the first support portion is designed to be greater than the cross-sectional width of the second support portion. Further, a connection hole is arranged on the first support portion 21, and the first rotating member 6 passes through this connection hole to rotationally connect the first support portion 21 and the guiding member 3.

[0049] Further, due to the limitation of the space inside the coupler 1, it is difficult to directly connect the driving member 4 and the guiding member 3 and drive the guiding member 3 to the corresponding position. To solve this problem, a second support member 5 is arranged between the driving member 4 and the second support portion 22, that is, one end of the second support member 5 is connected to the second support portion 22, and the other end is rotationally connected to the driving member 4. At the same time, the second support member 5 and the first support member 2 are arranged at an angle, and the angle is preferably 90°. By arranging this structure, the driving member 4 can drive the guiding member 3 more effectively; that is, by arranging this structure, it is more convenient to arrange the driving member at the corresponding position.

[0050] The guiding member 3 is used to increase the coupling guiding range of the coupler 1 and improve the connection performance of the coupler 1. Specifically, the guiding member 3 is an arc-shaped rod-like structure, the guiding member 3 is rotationally connected to the first support member 2, that is, one end of the guiding member 3 is rotationally connected to the first support portion; the other end is rotationally connected to the driving member 4. At the same time, a convex block 31 is also arranged on the guiding member 3.

[0051] The driving member 4 is used to drive the guiding member 3 to extend and retract. When the vehicles are coupled, under the action of the driving member 4, the guiding member 3 extends; after the coupling is completed, under the action of the driving member 4, the guiding member 3 retracts. Since the driving member itself is provided with a self-locking structure, when the driving member retracts to the original state, the driving member is self-locked, thereby preventing the guiding member 3 from moving and making the guiding member 3 in a retracted and locked state. The driving member 4 can be selected from automatic components such as cylinders, electric cylinders, motors, etc., or can be manually driven. In this embodiment, the driving member 4 is preferably a cylinder. Specifically, the driving member 4 is arranged on the coupler 1 and is rotatably connected to the second support member 5, and at the same time, its power output end is rotatably connected to the guiding member 3. When the vehicles are coupled, the direction in which the driving member 4 pushes the guiding member 3 to extend is consistent with the direction in which the coupler 1 is coupled, so that the guiding member 3 can play a guiding role for the coupler 1. At this time, the guiding member 3 rotates counterclockwise and extends, and the included angle with the first support member 2 is A 1 , and A 1 is about 180°; after the coupling is completed, the driving member 4 drives the guiding member 3 to retract, that is, the movement direction of the guiding member 3 at this time is consistent with the direction in which the coupler 1 is uncoupled. After the coupling is completed, the guiding member 3 rotates clockwise and retracts. At this time, the included angle between the guiding member 3 and the first support member 2 is A 2 . It can be seen from this that when the guiding member 3 is in the retracted state, the occupied space is significantly reduced, making the structure compact. Thus, the technical problem in the prior art that the guiding member 3 occupies a large space and causes the vehicle hood to be unable to achieve a compact type is solved.

[0052] In order to enable the driving member 4 to act on the guiding member 3 more effectively with the driving force, a first connecting member 9 and a second connecting member 10 are arranged between the guiding member 3 and the driving member 4, so that the driving member 4 can drive the guiding member 3 to move by driving the first connecting member 9 and the second connecting member 10, thereby enabling the guiding member 3 to rotate to the required position quickly and accurately.

[0053] Specifically, one end of the first connecting member 9 is rotatably connected to the guiding member 3, and the other end is rotatably connected to the power output end of the driving member 4. More specifically, the first connecting member 9 is rotatably connected to the convex block 31 of the guiding member 3. One end of the second connecting member 10 is rotatably connected to the coupler 1, and the other end of the second connecting member 10 is rotatably connected to the first connecting member 9. In this embodiment, the first connecting member 9, the second connecting member 10 and the power output end of the driving member 4 are rotatably connected at one point. Further, the first connecting member 9, the second connecting member 10 and the power output end of the driving member 4 are rotatably connected by providing a second rotating member 7, and the second rotating member 7 is preferably a rotating shaft structure. Under the action of the driving member 4, the first connecting member 9 and the second connecting member 10 rotate simultaneously. At the same time, the first connecting member 9 and the second connecting member 10 are arranged at an angle, and by providing this structure, the guiding member 3 can extend accurately and stably.

[0054] Among them, through the connection between the guiding member, the driving member, the first connecting member, the second connecting member, the first supporting member, and the second supporting member, a self-locking state can be formed when the guiding member extends to the in-place position; when the guiding member retracts to the in-place position, the driving member enters the self-locking state.

[0055] It should be further noted that first, the rotation connection point between the convex block 31 of the guiding member 3 and the first connecting member 9 is denoted as connection point A, the rotation connection points between the first connecting member 9, the second connecting member 10, and the driving member 4 are denoted as B, and the rotation connection point between the second connecting member 10 and the coupler is denoted as C. When the vehicles are in multiple unit connection and the driving member 4 extends to the maximum stroke position, connection point B is outside the line connecting connection point A and connection point C. If at this time the guiding member 3 is stressed and has a clockwise rotation tendency and connection point B has a tendency to move in the extending direction of the driving member 4, since the driving member 4 cannot continue to extend at this time, the guiding member still cannot rotate, thus forming self-locking; thereby making the guiding member in a locked state, enabling it to be stably in the corresponding position, and thus effectively playing a guiding role.

[0056] In order to prevent the guiding member 3 from being unable to be stable in the corresponding position when the driving member 4 fails, an adjusting assembly 8 is provided in this embodiment. Specifically, the adjusting assembly 8 includes an elastic member 81. One end of the elastic member 81 is fixedly connected to the coupler 1, and the other end is connected to the connection part between the first connecting member 9 and the power output end of the driving member 4; when the driving member 4 fails, it can prevent the guiding member 3 from moving in the direction of retracting towards the driving member 4 when the guiding member 3 is in the extended position, and at the same time, prevent the guiding member 3 from moving in the direction of extending towards the driving member 4 when the guiding member 3 is in the retracted position. In this embodiment, the elastic member 81 is preferably a tension spring or a torsion spring, and other structures can also be selected as long as the position of the guiding member 3 can be kept unchanged. More specifically, the third adjusting assembly 8 further includes a third supporting member 82, a third rotating member 83, and a fourth supporting member 84; the third supporting member 82 is arranged on the coupler 1; the third rotating member 83 is arranged on the third supporting member 82, and through the third rotating member 83, the second connecting member 10 is rotationally connected to the third supporting member 82; the fourth supporting member 84 is arranged on the third supporting member 82, and through the fourth supporting member 84, the elastic member 81 is fixedly connected to the third supporting member 82. Further, in this embodiment, the third supporting member 82 is preferably a rectangular block structure, the third rotating member 83 is preferably a rotating shaft, and the fourth supporting member 84 is preferably a fixed shaft structure.

[0057] Further, the third rotating member 83 and the fourth supporting member 84 are located on different horizontal planes.

[0058] When the guiding member 3 is in the extended state, the included angle between the second connecting member 10 and the power output end of the driving member 4 is ɑ 1 , and the included angle between the elastic member 81 and the power output end of the driving member 4 is ɑ2 and α 1 <α 2 . By adopting this structural design, through mechanical analysis, it can be known that when the guide member is in the position as shown in Figure 3 , that is, when the guide member is in the extended state, if the driving member 4 fails at this time, the second rotating member 7 can be prevented from rotating under the pulling force of the elastic member 81, thereby restricting the retraction of the first connecting member 9, the second connecting member 10 and the driving member 4. At the same time, at this time, the driving member extends to the maximum position, so that the guiding member 3 is in the extended and locked state. Thus, it is ensured that the guiding member 3 is stably located at the corresponding position, thereby ensuring the normal connection operation of the coupler 1.

[0059] When the guiding member 3 is in the retracted state, the included angle between the second connecting member 10 and the power output end of the driving member 4 is α 3 , and the included angle between the elastic member 81 and the power output end of the driving member 4 is α 4 and α 4 <α 3 . By adopting this structural design, through mechanical analysis, it can be known that when the guide member is in the position as shown in Figure 4 , that is, when the guide member is in the retracted state, if the driving member 4 fails at this time, the second rotating member 7 can be prevented from rotating under the pulling force of the elastic member 81, thereby restricting the movement of the first connecting member 9, the second connecting member 10 and the power output end of the driving member 4 in the direction of extending towards the guiding member 3. Thus, it is ensured that the guiding member 3 is stably located at the corresponding position, so that the guiding member 3 can be stably in the retracted state after the vehicle multiple unit connection is completed. At the same time, due to the self-locking structure provided on the driving member itself, when the driving member retracts to the original state, the driving member is self-locked, thereby preventing the guiding member 3 from moving, and further ensuring that the guiding member 3 is in the retracted and locked state. Thus, it is ensured that the guiding member 3 can still stably have a small occupied space in the state of the failure of the driving member 4, making the vehicle hood present a compact structure. Thereby, the technical problem that the guiding member 3 in the prior art occupies a large space and causes the vehicle hood to be unable to achieve a compact type is solved.

[0060] To illustrate the present application more clearly, the working principle of the present invention will be further described below by taking the embodiment shown in Figures 1 to 4 as an example:

[0061] When the vehicles are coupled, the power output end of the driving member 4 moves towards the direction of the coupler 1 connection, thereby driving the first connecting member 9 and the second connecting member 10 to rotate simultaneously. Since the guiding member 3 is connected to the first connecting member 9, the guiding member 3 rotates counterclockwise and extends towards the direction of the coupler 1 connection under the driving of the first connecting member 9. When the guiding member 3 extends in place, at this time, the driving member 4 extends to the maximum position of the stroke, and the connection point B is outside the line connecting the connection point A and the connection point C. If at this time the guiding member 3 is subjected to a clockwise rotation tendency and the connection point B has a tendency to move in the extending direction of the driving member 4, since the driving member 4 cannot continue to extend at this time, the guiding member still cannot rotate, thus forming a self-locking; thereby making the guiding member in a locked state, enabling it to stably be in the corresponding position, and effectively playing a guiding role.

[0062] After the coupling is completed, the driving member 4 retracts, thereby driving the first connecting member 9 and the second connecting member 10 to rotate simultaneously. Since the guiding member 3 is connected to the first connecting member 9, the guiding member 3 retracts towards the inner side of the coupler connection surface under the driving of the first connecting member 9. When the driving member 4 retracts to its original position, the driving member enters its own locked state, thereby enabling the guiding member 3 to complete retraction and be locked. At this time, the occupied space of the guiding member 3 is small, thus solving the technical problem in the prior art that the large occupied space of the guiding member 3 causes the vehicle hood to be unable to achieve a compact structure.

[0063] Meanwhile, an adjusting assembly 8 is also provided. When the guiding member 3 is in the extended state and the driving member 4 fails, the second rotating member 7 can be prevented from rotating under the pulling force of the elastic member 81, thereby restricting the retraction of the power output ends of the first connecting member 9, the second connecting member 10 and the driving member 4. Thus, it is ensured that the guiding member 3 is stably located in the corresponding position, thereby ensuring the normal progress of the coupling work of the coupler 1;

[0064] When the guiding member 3 is in the retracted state, the second rotating member 7 can be prevented from rotating under the pulling force of the elastic member 81, thereby restricting the extension of the power output ends of the first connecting member 9, the second connecting member 10 and the driving member 4. Thus, it is ensured that the guiding member 3 is stably located in the corresponding position, thereby enabling the guiding member 3 to stably be in the retracted state after the vehicle coupling is completed. Thus, it is ensured that the guiding member 3 can still stably achieve a small occupied space and a compact structure in the state of the driving member 4 failure. Thus, the technical problem in the prior art that the large occupied space of the guiding member 3 causes the vehicle hood to be unable to achieve a compact structure is solved.

[0065] Based on the above, the present invention has at least the following technical effects and advantages:

[0066] 1. In the present invention, a guiding member 3 is rotatably provided on a first supporting portion 21 of a first supporting member 2, and the first supporting portion 2 is connected to a driving member 4, and a power output end of the driving member 4 is connected to the guiding member 3. Thus, under the driving action of the driving member 4, the guiding member 3 is driven to perform a back-and-forth folding movement, that is, the telescoping of the guiding member is realized. By adopting the above structure, when the vehicles are coupled, the guiding member 3 extends to the working position, that is, under the driving action of the driving member 4, the guiding member 3 extends in place and is locked. After the coupling is completed, the guiding member 3 retracts and is locked. Thus, the guiding member 3 occupies a small space and has a compact structure. Thereby, the technical problem in the prior art that the large space occupied by the guiding member 3 causes the vehicle hood to be unable to achieve a compact type is solved.

[0067] 2. In the present invention, a first connecting member 9 and a second connecting member 10 are provided between the guiding member 3 and the driving member 4, so that the driving member 4 can more effectively apply the driving force to the guiding member 3, and the guiding member 3 can accurately extend and retract.

[0068] 3. By setting the positional relationship among the guiding member 3, the first connecting member 9, the second connecting member 10, and the driving member 4, when the vehicles are coupled and the driving member 4 extends to the maximum stroke position, the rotation connection point B among the first connecting member 9, the second connecting member 10, and the driving member 4 is outside the connection line between the rotation connection point A between the convex block 31 of the guiding member 3 and the first connecting member 9 and the rotation connection point C between the second connecting member 10 and the coupler. If at this time the guiding member 3 is stressed and has a clockwise rotation tendency and the connection point B has a tendency to move in the extending direction of the driving member 4, since the driving member 4 cannot continue to extend at this time, the guiding member still cannot rotate, thus forming a self-locking; thereby making the guiding member in a locked state, stably staying in the corresponding position, and effectively playing a guiding role. After the coupling is completed, the driving member 4 retracts to its original position and enters its own locked state, and the driving member 4 drives the guiding member 3 to complete retraction and locking, so that the guiding member can stably stay in the retracted state. At this time, the guiding member 3 occupies a small space, thereby solving the technical problem in the prior art that the large space occupied by the guiding member 3 causes the vehicle hood to be unable to achieve a compact type.

[0069] 4. In the present invention, an adjusting assembly 8 is provided. By providing the adjusting assembly 8, the guiding member 3 can stably stay in the corresponding position even when the driving member 4 is in a faulty state. Thereby ensuring that when the vehicles are coupled, the coupling work of the coupler 1 proceeds normally; and also ensuring that after the vehicles are coupled, the guiding member 3 can stably stay in the retracted state, thereby ensuring that the guiding member 3 can still maintain a small occupied space when the driving member 4 is faulty.

Claims

1. A folding guiding device for a coupler, characterized in that, it includes, a support assembly, the support assembly is fixedly arranged on the coupler; a guiding member, the guiding member is rotatably connected to one end of the support assembly, and the guiding member is in an arc-shaped rod structure; a driving member, the driving member is connected to the other end of the support assembly; and the power output end of the driving member is rotatably connected to the guiding member; under the driving action of the driving member, the guiding member is enabled to reach the extended position or the retracted position; wherein, when the vehicles are coupled, the guiding member is extended under the action of the driving member; after the coupling is completed, the guiding member is retracted under the action of the driving member.

2. The folding guiding device for a coupler according to claim 1, characterized in that, it further includes, a first connecting member, one end of the first connecting member is rotatably connected to the guiding member, and the other end thereof is rotatably connected to the power output end of the driving member; a second connecting member, one end of the second connecting member is rotatably connected to the coupler, and the other end of the second connecting member is rotatably connected to the first connecting member and the power output end of the driving member, so that the first connecting member and the second connecting member rotate simultaneously under the action of the driving member.

3. The folding guiding device for a coupler according to claim 2, characterized in that, the support assembly includes, a first support member, the first support member is fixedly arranged on the coupler; and the first support member includes a first support portion and a second support portion arranged oppositely, and the first support portion is rotatably connected to the guiding member; a second support member, one end of the second support member is connected to the second support portion and is arranged at an angle; and the second support member is rotatably connected to the driving member; wherein, through the connection between the guiding member, the driving member, the first connecting member, the second connecting member, the first support member and the second support member, the guiding member can form a self-locking state when it reaches the extended position; when the guiding member reaches the retracted position, the driving member enters the self-locking state.

4. The folding guiding device for a coupler according to claim 3, characterized in that, the first support member and the guiding member are rotatably connected by arranging a first rotating member; the first connecting member, the second connecting member and the power output end of the driving member are rotatably connected by arranging a second rotating member.

5. The folding guiding device for a coupler according to any one of claims 2-4, characterized in that, a convex block is arranged on the guiding member, and the convex block is rotatably connected to the first connecting member.

6. The folding guiding device for a coupler according to any one of claims 2-4, characterized in that, it further includes an adjusting assembly, and the adjusting assembly includes, an elastic member, one end of the elastic member is fixedly connected to the coupler, and the other end thereof is connected to the connection part of the first connecting member and the power output end of the driving member; when the driving member fails, it can prevent the guiding member from extending or retracting.

7. The folding guiding device for a coupler according to claim 6, characterized in that, the adjusting assembly further includes, a third support member, the third support member is arranged on the coupler; A third rotating member, the third rotating member is disposed on the third support member, and the second connecting member is rotationally connected to the third support member through the third rotating member; A fourth support member, the fourth support member is disposed on the third support member, and the elastic member is fixedly connected to the third support member through the fourth support member.

8. The foldable guiding device for a coupler according to claim 6, wherein, When the guiding member is in the extended state, the included angle between the second connecting member and the power output end of the driving member is ɑ 1 , and the included angle between the elastic member and the power output end of the driving member is ɑ 2 , and ɑ 1 < ɑ 2 ; When the guiding member is in the retracted state, the included angle between the second connecting member and the power output end of the driving member is α 3 , the included angle between the elastic member and the power output end of the driving member is α 4 , and α 4 < α 3 .

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