Highway and railway freight vehicle connecting device

Abstract

The invention belongs to the technical field of vehicle connection, and particularly relates to a highway-railway freight vehicle connecting device. The car coupler comprises a car coupler body and an impact seat, the car coupler body is connected with the impact seat through a coupler yoke pin, the impact seat is welded to a car chassis, the car coupler body comprises a coupler body, a coupler knuckle, an uncoupling rod, a tension spring rod and a tension spring, the coupler body comprises a coupler head, a coupler body and a coupler tail, and a convex cone structure and a concave cone structure are arranged on the connecting face of the front end of the coupler head in a bilateral symmetry mode. The curved surface of the concave cone structure of one freight car coupler guides and envelops the convex cone structure of the other freight car coupler to enter the coupling position, a cavity matched with the coupler knuckle in shape is formed in the position, at the center of the car coupler connecting face, of the coupler head, and the coupler knuckle is movably arranged in the cavity. The space requirements that the upper portion of a vehicle is assembled with a container for transportation and the lower portion of the chassis is connected with a tractor head are met, the self-weight is small, the self-weight of the vehicle can be reduced, the coupling gap is small, the longitudinal impulse level of the vehicle can be improved, the dynamic performance is improved, and the space profile is small.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle connection, and in particular relates to a connecting device for a road-rail dual-purpose freight vehicle. Background Art

[0002] Road-rail vehicles need to meet both the transportation requirements on roads and the marshaling transportation requirements on railways. When a road-rail vehicle is transported on roads, it needs to be matched with a tractor head to form a complete vehicle for single-vehicle transportation. When the tractor head is assembled, the head connection part needs to be inserted into the lower part of the vehicle chassis. Therefore, the lower space of the vehicle chassis and the end connection device should ensure that there is enough space for the tractor head to be inserted into the lower part of the chassis. When transporting cargo, standard containers are generally placed on the vehicle chassis for transportation. The upper plane of the vehicle has strict standard height requirements. Therefore, the upper height and bottom space requirements of the road-rail vehicle limit the height of the vehicle's traction beam.

[0003] Existing railway freight car connection devices all have a support plate bolted to the bottom of the freight car bottom frame, and the coupler assembly and the impact seat extend beyond the bottom space of the bottom frame, which affects the connection of the tractor head. Therefore, a new road-rail dual-purpose freight car connection device is needed. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a road-rail dual-purpose freight vehicle connection device. It has the characteristics of small deadweight, coupling gap and space contour, and does not affect the connection of the tractor head, which well fills the connection device type of new road-rail dual-purpose vehicles.

[0005] The technical solution adopted by the present invention is: a road-rail dual-purpose freight vehicle connection device, including a coupler and an impact seat, the coupler is connected to the impact seat through a coupler tail pin, the impact seat is welded to the vehicle chassis, the height of the impact seat is lower than the height of the vehicle chassis, the coupler includes a hook body, a coupler tongue, a coupler release rod, a tension spring rod and a tension spring, the hook body includes a hook head, a hook body and a hook tail, a convex cone structure and a concave cone structure are symmetrically arranged at the front end connection surface of the hook head, the convex cone structure and the concave cone structure have the same contour surface shape, a freight coupler The curved surface of the concave cone structure guides and envelopes the convex cone structure of another freight coupler to enter the coupling position, and the hook head is provided with a cavity matching the shape of the hook tongue at the center of the coupler connection surface, and the hook tongue is movably arranged in the cavity, and the cavity is communicated with the curved surface of the concave cone structure, and the center of the hook tongue is connected to one end of the uncoupling rod, the middle part of the uncoupling rod is fixedly connected to one end of the first tension spring rod, the other end of the first tension spring rod is fixedly connected to one end of the tension spring, the other end of the tension spring is fixedly connected to the second tension spring rod, and the second tension spring rod is fixed on the hook body.

[0006] In the above technical solution, by setting a convex cone structure and a concave cone structure at the front end of the hook head and making their contour surfaces the same, the two freight hooks can be smoothly connected. The curved surface guidance of the concave cone structure and the enveloping convex cone structure ensure that the hooking process is smoother, reduce the error of human operation and the risk of improper connection, and improve the accuracy and safety of the hooking.

[0007] In a further preferred structure, the impact seat includes a top plate and a bottom plate opposite to each other up and down, and two side plates opposite to each other on the sides, and grooves are provided on the same side of the top plate and the bottom plate, and the two grooves of the top plate and the bottom plate constitute an evacuation space for other upper and lower parts of the vehicle.

[0008] A further preferred structure is that the upper and lower end surfaces of the impact seat are respectively provided with an upper plane hook tail pin hole and a lower plane hook tail pin hole, the upper plane hook tail pin hole is a circular hole structure, and the lower plane hook tail pin hole is a semicircular hole structure, which is used to limit the hook tail pin from falling from the lower plane hook tail pin hole. This structure can save the lower support plate structure and avoid restrictions on the connection of the tractor head.

[0009] A further preferred structure is that the hook pin is a round pin, wherein a threaded hole is provided on the upper end surface for installing or removing the hook pin from the upper part of the vehicle after threaded connection with a tool; a semicircular protrusion is cut on the lower end surface for cooperating with the hook pin hole on the lower plane of the impact seat for positioning and limiting the hook pin.

[0010] A further preferred structure is that the hook tongue is a semi-cylindrical structure, and the cavity is a semi-cylindrical cavity. The hook tongue is located in the initial connection position in the semi-cylindrical cavity through the connection of a tension spring. When the hook tongue is located in the initial connection position, the central section of the semi-cylindrical structure of the hook tongue forms a certain angle with the central plane between the convex cone structure and the concave cone structure. When the hook tongue is located in the initial connection position, a part of the hook tongue is located in the semi-cylindrical cavity, and the other part is located in the curved surface of the concave cone structure.

[0011] In the above technical solution, the semi-cylindrical structure of the hook tongue matches the cavity, allowing the hook tongue to move flexibly in the cavity. When the hook tongue is docked with the structure of the hook head, the tension of the tension spring can provide appropriate restraint force to ensure the stability and tightness of the connection. This design reduces the jamming phenomenon and improves the loading and unloading efficiency and connection reliability.

[0012] In a further preferred structure, the semi-cylindrical cavity is provided with semi-circular bosses above and below to limit the horizontal displacement of the hook tongue so that the hook tongue can rotate in the semi-cylindrical cavity.

[0013] A further preferred structure is that a center hole is opened at the center of the cross-section of the semi-cylindrical structure of the hook tongue, so that one end of the unhooking rod passes through the center hole and is connected and fixed with a locking nut and a gasket; a card slot is provided in the center hole of the hook tongue for assembly positioning and limiting the rotation of the unhooking rod.

[0014] A further preferred structure is that a threaded round rod is provided at one end of the unhooking rod, which is inserted into the center hole of the hook tongue and fixedly connected, and a vertical L-shaped structure handle is adopted at the other end for applying a load at the handle to operate the hook tongue to rotate.

[0015] A further preferred structure is that two parallel limit blocks are arranged on one side of the front end connecting surface of the hook head, and a gap is provided between the two limit blocks in the vertical direction. Both ends of the limit rod are respectively fixed on the two limit blocks, and a circular hole is provided on each limit block for installing the limit rod.

[0016] A further preferred structure is that a limit plate is provided in the middle of the unhooking rod, and a bayonet is provided on the limit plate. When the hook tongue rotates to the separation position, the limit plate contacts the outer end surface of the hook head, and the bayonet cooperates with the limit rod to limit the maximum rotation angle of the hook tongue.

[0017] A further preferred structure is that two planes are provided on the two limit blocks, and the circular hole includes an inner circular hole and an outer circular hole, and the inner circular hole and the outer circular hole are respectively opened on the inner and outer planes of the limit blocks, so as to rotate the limit rod from the outer circular holes of the two limit blocks to the inner circular holes, and cooperate with the bayonet opened on the limit plate of the unhooking rod to limit the unhooking rod.

[0018] In the above technical solution, by setting the limit block and the limit rod, the rotation range of the hook tongue can be effectively limited to prevent the hook tongue from over-rotating or losing control. This design helps to ensure the stability and accuracy of the hook tongue during operation, avoids connection failure or damage caused by excessive rotation or improper movement, and improves the safety and reliability of the overall system.

[0019] In a further preferred structure, a central circular hole is provided in the middle of the unhooking rod for passing the tension spring rod and the anti-loosening nut and the gasket to fix the tension spring.

[0020] A further preferred structure is that the hook tail adopts a spherical end surface structure to support the hook to rotate or move horizontally in all directions around the center of the spherical end surface, and the hook tail is provided with a hook tail pin hole to connect with the impact seat through the hook tail pin.

[0021] In the above technical solution, the spherical end surface structure of the hook tail can support the freight vehicle coupler to rotate or move horizontally around the center of the spherical end surface in all directions, ensuring adaptability and flexibility in different situations. This allows the coupler to maintain a stable connection when the vehicle position changes slightly, avoiding connection problems caused by changes in vehicle position and improving operational flexibility and stability.

[0022] The invention realizes the connection of the tractor head, meets the space requirements of assembling the container on the upper part of the vehicle for transportation and connecting the tractor head at the lower part of the chassis. The vehicle has a small deadweight, which can reduce the deadweight of the vehicle, has a small coupling gap, can improve the longitudinal impulse level of the vehicle, improve the dynamic performance, and has a small space profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of another angle of the present invention;

[0025] Figure 3 This is a schematic diagram of the connection between the present invention and the vehicle chassis;

[0026] Figure 4 This is a front view of the coupler of the present invention;

[0027] Figure 5 for Figure 4 Sectional view at AA;

[0028] Figure 6 A top view of the coupler of the present invention;

[0029] Figure 7 It is a left side view of the coupler of the present invention;

[0030] Figure 8 It is a right side view of the coupler of the present invention;

[0031] Fig. 9 A three-dimensional diagram of the coupler of the present invention;

[0032] Fig.10 A three-dimensional diagram of the coupler of the present invention from another angle;

[0033] In the figure, 1-hook body (11-hook head; 111-convex cone structure; 112-concave cone structure; 113-semi-cylindrical cavity; 114-semi-circular boss; 115-limiting block; 151-circular hole; 12-hook body; 13-hook tail; 131-hook tail pin hole); 2-tension spring rod; 3-tension spring; 4-unhooking rod (41-L-shaped structure handle; 42-limiting plate; 421-bayonet; 43-center circular hole); 5-anti- Loose nut; 6-hook tongue (61-center hole; 62-slot); 7-locking nut; 8-nut (81-cotter pin); 9-limiting rod; 100-impact seat (101-upper plane hook tail pin hole; 102-lower plane hook tail pin hole; 103-top plate; 104-bottom plate; 105-side plate; 106-groove); 200-hook tail pin (201-threaded hole; 202-protrusion); 300-vehicle chassis. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0036] It should be understood that the term “and / or” used in the specification and appended claims of this application refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0037] In addition, in the description of the present application and the claims, the terms "first", "second", "third", "top", "bottom", "one side", "the other side", "one end", "the other end", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. For example, without departing from the scope of this specification, the first component can be called the second component, and similarly, the second component can be called the first component. The components at the top and the bottom can also be swapped or converted with each other under certain circumstances; the components at one end and the other end can have the same or different performances.

[0038] In the case of using "including", "having" and "comprising" described in this specification, unless used, there may also be another part or other parts, and the terms used may generally be singular but may also represent plural forms. In the description of this specification, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, when constituting a component, although there is no clear description thereof, it can be understood that a certain error area must be included.

[0039] When describing a positional relationship, for example, when the positional sequence is described as "on," "above," "below," and "next," unless words or terms such as "just" or "directly" are used, situations where they are not in contact or in contact may also be included. If a first element is mentioned to be "on" a second element, it does not mean that the first element must be above the second element in the figure. The upper and lower parts of the component will change depending on the change in the angle of observation and orientation. Therefore, in the drawings or in the actual construction, if it is mentioned that the first element is "on" the second element, it may include a situation where the first element is "below" the second element and a situation where the first element is "above" the second element.

[0040] like Figure 1-3 As shown, the present invention is a road-rail dual-purpose freight vehicle connection device, comprising a coupler and an impact seat 100, the coupler is connected to the impact seat 100 as a whole through a coupler tail pin 200, the impact seat 100 is welded to the vehicle underframe 300 as a whole, and the height of the impact seat 100 is lower than the height of the vehicle underframe 300, meeting the requirements of the assembly space of other upper and lower components of the vehicle. Figure 4-10 As shown, the hook includes a hook body 1, a hook tongue 6, an unhooking rod 4, a tension spring 3, a tension spring rod 2, and a limit rod 9. The hook body 1 is integrally cast from a hook head 11, a hook body 12, and a hook tail 13. A convex cone structure 111 and a concave cone structure 112 are arranged on the left and right sides of the connection surface of the hook head 11. The convex cone structure 111 and the concave cone structure 112 have the same contour surface and both adopt a variable cross-section cylindrical structure. The curved surface of the concave cone structure 112 guides and envelops the convex cone structure 111 to enter the hooking position. The hook head 11 and the hook body 12 adopt a hollow structure inside to reduce their own weight. A semi-cylindrical cavity 113 matching the hook tongue 6 is arranged at the center of the hook connection surface of the hook head 11. The semi-cylindrical cavity 113 is connected to the space formed by the curved surface of the concave cone structure 112 itself. Semi-circular bosses 114 are arranged above and below the semi-cylindrical cavity 113 to limit the horizontal displacement of the hook tongue 6 so that the hook tongue 6 can only rotate in the semi-cylindrical cavity 113. The upper part of the hook head 11 is connected to the hook body 12 with reinforcing ribs to enhance the strength of the hook. Two limit blocks 115 are provided at one end of the connection surface of the hook head 11. They are of the same size and shape and have a certain vertical spacing. At the same time, there are two circular holes 151 on the two limit blocks 115 to support the limit rod 9 for limiting. The hook body 12 adopts a hollow square column structure to reduce its own weight. The hook tail 13 adopts a spherical end face structure to support the full rotation or horizontal movement of the hook around the center of the spherical end face. The hook tail 13 has a hook tail pin hole 131 with an oblong hole structure to connect with other vehicle parts.

[0041] In some optional embodiments, such as Figure 1-3As shown, the impact seat 100 includes a top plate 103 and a bottom plate 104 facing each other, and two side plates 105 facing each other. A groove 106 is provided on the same side of the top plate 103 and the bottom plate 104. The two grooves 106 of the top plate 103 and the bottom plate 104 constitute an avoidance space for other upper and lower parts of the vehicle.

[0042] In some optional embodiments, such as Figure 1-3 As shown, the upper and lower end surfaces of the impact seat 100 are respectively provided with an upper plane hook tail pin hole 101 and a lower plane hook tail pin hole 102. The upper plane hook tail pin hole 101 is a circular hole structure, and the lower plane hook tail pin hole 102 is a semicircular hole structure, which is used to limit the hook tail pin 200 from falling from the lower plane hook tail pin hole 102. This structure can save the lower support plate structure and avoid restrictions on the connection of the tractor head.

[0043] In some optional embodiments, such as Figure 1-3 As shown, the hook pin 200 is a round pin, wherein a threaded hole 201 is provided on the upper end surface for installing or removing the hook pin 200 from the upper part of the vehicle after being threadedly connected with a tool; a semicircular protrusion 202 is cut out on the lower end surface for cooperating with the hook pin hole 102 on the lower plane of the impact seat 100 to position and limit the hook pin 200.

[0044] In some optional embodiments, such as Figure 4-10 As shown, the hook tongue 6 adopts a semi-cylindrical structure, and a semi-circular boss 114 is set on the edge. It is assembled with the hook body 1 in the semi-cylindrical cavity 113. The hook body 1 and the hook tongue 6 adopt a clearance fit to support the hook tongue 6 to rotate horizontally around the center of the semi-circular boss 114 of the hook body 1. The assembly clearance between the hook tongue 6 and the hook body 1 is the coupling clearance of the coupler. Compared with the traditional truck coupler, this structure can greatly reduce the coupling clearance, thereby reducing the longitudinal impulse of the train and improving the life and reliability of the coupler components. A center hole 61 is opened at the center of the semi-cylindrical structure section of the hook tongue 6, so that the uncoupling rod 4 passes through the center hole 61 to be connected and fixed with the locking nut 7 and the gasket. A slot 62 structure is adopted at the center hole 61 of the semi-cylindrical surface of the hook tongue 6 to assemble and position and limit the rotation of the uncoupling rod 4.

[0045] In some optional embodiments, such as Figure 4-10 As shown, a threaded round rod is provided at one end of the unhooking rod 4, which is inserted into the central hole 61 of the hook tongue 6 for connection and fixation, and a vertical L-shaped structure handle 41 is used at the other end to apply a load at the handle to operate the hook tongue 6 to rotate. A limit plate 42 is provided in the middle of the unhooking rod 4, and a bayonet 421 is provided on the limit plate 42. When the hook tongue 6 rotates to the separation position (that is, the central section of the semi-cylindrical structure of the hook tongue 6 coincides with the central plane between the convex cone structure 111 and the concave cone structure 112), the limit plate 42 and the outer end surface of the hook head 11 ( Fig. 9The bayonet 421 cooperates with the limiting rod 9 to limit the rotation limit angle of the hook tongue 6. A central circular hole 43 is provided in the middle of the unhooking rod 4 to pass the tension spring rod 2 and the anti-loosening nut 5 and the gasket to fix the tension spring 3.

[0046] In some optional embodiments, such as Figure 4-10 As shown, one end of the tension spring 3 is fixed to the hook body through the tension spring rod 2, and the other end is fixed to the unhooking rod 4 through the tension spring rod 2. When the tension spring 3 is assembled, a certain pre-tension is applied to ensure that the hook tongue 6 is in the initial connection position before the connection. The initial connection position refers to the initial position of the hook tongue 6 in the semi-cylindrical cavity 113 of the hook body 1. At this time, the central section of the semi-cylindrical structure of the hook tongue 6 forms a certain angle with the central plane between the convex cone structure 111 and the concave cone structure 112 ( Figure 5 In the figure α), a part of the hook tongue 6 is located in the semi-cylindrical cavity 113, and the other part is located in the curved surface of the concave cone structure 112. During the rotation of the hook tongue 6, the tension of the tension spring 3 becomes larger and larger. When the hook tongue 6 rotates to the separation position (that is, the central section of the semi-cylindrical structure of the hook tongue 6 coincides with the central plane between the convex cone structure 111 and the concave cone structure 112), the tension of the tension spring 3 is at the maximum value. At this time, the load applied to the unhooking rod 4 is eliminated. Under the action of the tension, the tension spring 3 can rotate with the hook tongue 6 and the unhooking rod 4 to restore to the original connected initial position.

[0047] In some optional embodiments, such as Figure 4-10 As shown, the limiting rod 9 adopts a cylindrical structure, and two planes are respectively provided on the two limiting blocks 115, and the outer circular hole and the inner circular hole are respectively opened on the two planes, so that after the limiting rod 9 is rotated, it can be moved from the outer circular hole of the two limiting blocks 115 of the hook head 11 to the inner circular hole to limit the limiting plate 42 of the unhooking rod 4.

[0048] The method of using the present invention is as follows: when two couplers are connected, the convex cone structures 111 of the two freight couplers are respectively inserted into the concave cone structures 112 of the opposite freight couplers. As the convex cone structure 111 moves forward along the arc guide line of the concave cone structure 112, the cross-section of the convex cone structure 111 squeezes the semi-cylindrical hook tongue 6 to rotate from the initial position in the semi-cylindrical cavity 113 of the hook body 1. When the rotation centers of the two freight coupler hook tongues 6 are close to overlapping, the two coupler hook bodies 1 form a complete cylindrical cavity, and the two coupler hook tongues 6 form a complete cylindrical stopper. Under the tension of their respective tension springs 3, the two coupler hook tongues 6 are rotated to the connection position (the same position as the initial connection position), thereby completing the connection action of the two couplers.

[0049] When the two couplers are separated, a load is applied to the handle of the unhooking lever 4 to rotate the hook tongue 6 to the separation position. At this time, the limit plate 42 of the unhooking lever 4 is aligned with the outer end surface of the hook head 11 ( Fig. 9The limit rod 9 is rotated to move from the outer hole of the limit plate 42 to the inner hole of the limit plate 42, and is engaged with the bayonet 421 of the limit plate 42 to limit the rebound of the unhooking rod 4 under tension, thereby ensuring that the hook tongue 6 is in the separation position, thereby completing the separation of the two hooks.

[0050] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field.

Claims

1. A road-rail dual-purpose freight vehicle connection device, characterized in that: The invention comprises a coupler and an impact seat (100), wherein the coupler is connected to the impact seat (100) via a coupler tail pin (200), and the impact seat (100) is welded to a vehicle chassis (300). The coupler comprises a hook body (1), a coupler tongue (6), a coupler release rod (4), a tension spring rod (2) and a tension spring (3). The coupler body (1) comprises a hook head (11), a hook body (12) and a hook tail (13). A convex cone structure (111) and a concave cone structure (112) are symmetrically arranged at the front end connection surface of the hook head (11). The curved surface of the concave cone structure (112) of one freight coupler guides and envelops the curved surface of the concave cone structure (112) of another freight coupler. The convex cone structure (111) enters the hooking position, and the hook head (11) is provided with a cavity matching the shape of the hook tongue (6) at the center of the coupler connection surface, and the hook tongue (6) is movably arranged in the cavity, and the cavity is communicated with the curved surface of the concave cone structure (112), and the center of the hook tongue (6) is connected to one end of the unhooking rod (4), and the middle of the unhooking rod (4) is fixedly connected to one end of the first tension spring rod (2), and the other end of the first tension spring rod (2) is fixedly connected to one end of the tension spring (3), and the other end of the tension spring (3) is fixedly connected to the second tension spring rod (2), and the second tension spring rod (2) is fixed on the hook body (12).

2. A road-rail dual-purpose freight vehicle connection device according to claim 1, characterized in that: The hook tongue (6) is a semi-cylindrical structure, and the cavity is a semi-cylindrical cavity (113). The hook tongue (6) is located in an initial connection position in the semi-cylindrical cavity (113) through the connection of a tension spring (3). When the hook tongue (6) is located in the initial connection position, a central section of the semi-cylindrical structure of the hook tongue (6) forms a certain angle with a central plane between the convex cone structure (111) and the concave cone structure (112), and a part of the hook tongue (6) is located in the semi-cylindrical cavity (113), and another part is located in a curved surface of the concave cone structure (112).

3. A road-rail dual-purpose freight vehicle connection device according to claim 2, characterized in that: The semi-cylindrical cavity (113) is provided with semi-circular bosses (114) at the top and bottom, which are used to limit the horizontal displacement of the hook tongue (6) so that the hook tongue (6) can rotate in the semi-cylindrical cavity (113).

4. A road-rail dual-purpose freight vehicle connection device according to claim 1, characterized in that: A center hole (61) is provided at the center of the semi-cylindrical structure section of the hook tongue (6), so that one end of the unhooking rod (4) can pass through the center hole (61) and be connected and fixed with the locking nut (7) and the gasket; a slot (62) is provided in the center hole (61) of the hook tongue (6) for assembly positioning and limiting the rotation of the unhooking rod (4).

5. A road-rail dual-purpose freight vehicle connection device according to claim 4, characterized in that: A threaded round rod is arranged at one end of the unhooking rod (4) and inserted into the central hole (61) of the hook tongue (6) for fixed connection, and a vertical L-shaped structure handle (41) is adopted at the other end for applying a load at the handle to operate the hook tongue (6) to rotate.

6. The road-rail dual-purpose freight vehicle connection device according to claim 1, characterized in that: Two mutually parallel limit blocks (115) are arranged on one side of the front end connection surface of the hook head (11), and a gap is provided between the two limit blocks (115) in the vertical direction. The two ends of the limit rod (9) are respectively fixed on the two limit blocks (115), and a circular hole (151) is provided on each limit block (115) for installing the limit rod (9).

7. A road-rail dual-purpose freight vehicle connection device according to claim 6, characterized in that: A limit plate (42) is arranged in the middle of the unhooking rod (4), and a bayonet (421) is provided on the limit plate (42). When the hook tongue (6) rotates to the separation position, the limit plate (42) contacts the outer end surface of the hook head (11), and the bayonet (421) cooperates with the limit rod (9) to limit the rotation limit angle of the hook tongue (6).

8. The road-rail dual-purpose freight vehicle connection device according to claim 6, characterized in that: The two limit blocks (115) are each provided with two planes, and the circular hole (151) comprises an inner circular hole and an outer circular hole, which are respectively provided on the inner and outer planes of the limit block (115) so as to rotate the limit rod (9) from the outer circular hole of the two limit blocks (115) to the inner circular hole, and cooperate with the bayonet (421) provided on the limit plate (42) of the unhooking rod (4) to limit the unhooking rod (4).

9. The road-rail dual-purpose freight vehicle connection device according to claim 1, characterized in that: A central circular hole (43) is provided in the middle of the unhooking rod (4) for passing the tension spring rod (2) and the anti-loosening nut (5) and the gasket to fix the tension spring (3).

10. The road-rail dual-purpose freight vehicle connection device according to claim 1, characterized in that: The hook tail (13) adopts a spherical end surface structure to support the vehicle hook to rotate in all directions or move horizontally around the center of the spherical end surface. The hook tail (13) is provided with a hook tail pin hole (131) to be connected to the impact seat (100) through a hook tail pin (200).

Images