Connecting mechanism, traction device and trailer type vehicle

Abstract

The utility model relates to a connecting mechanism, a traction device and a pull type vehicle, the connecting mechanism comprises a connecting assembly and a locking assembly, the connecting assembly comprises a connecting piece, a switching piece and a stopping piece, the stopping piece and the switching piece are sequentially arranged on the connecting piece in the axial direction of the connecting piece, and the switching piece is in sliding connection with the connecting piece; a first guide face and a second guide face are arranged on the two sides of the switching piece correspondingly, and the second guide face is arranged back to the stop piece. A groove matched with the switching piece is formed in the side, facing the switching piece, of the stop piece. The locking assembly comprises a locking piece and a first elastic piece, and the first elastic piece enables the locking piece to have the trend of moving towards the connecting piece all the time. According to the traction device, through cooperation of the locking piece, the stopping piece and the switching piece, the connecting piece can be repeatedly pushed and pulled, so that the connecting assembly and the locking assembly are circularly switched between the locking state and the separation state, and the traction device can be rapidly, simply and conveniently connected and separated only through pushing and pulling of the connecting piece.

Description

Technical Field

[0001] This application relates to the field of traction technology, specifically to a connecting mechanism, a traction device, and a trailer vehicle. Background Technology

[0002] In existing technologies, the connection between the towing component and the towed component is often achieved through a traction device, such as the connection between a trailer and the towed vehicle or the towed compartment.

[0003] Existing traction devices typically include a resilient pin assembly and a resilient limiting assembly. First, the pin in the resilient pin assembly is inserted into the connecting hole of the trailing pin. Then, the resilient limiting assembly locks the resilient pin in place. This means that to disconnect the traction device, the resilient limiting assembly must be pulled to release the locking of the resilient pin, and then the resilient pin must be pulled to release the connection with the trailing pin. Furthermore, while pulling the resilient pin, a pulling force must be continuously applied to the resilient limiting assembly. This means that when disconnecting the traction device, the operator needs to pull the resilient pin assembly and the resilient limiting assembly separately with both hands. This not only increases the operator's workload but also increases the difficulty of separating the traction device and reduces its separation efficiency. Utility Model Content

[0004] One objective of this application is to provide a connecting mechanism to solve the technical problem that the existing traction device has high operational difficulty and low separation efficiency when disconnecting; another objective is to provide a traction device; and a third objective is to provide a trailer vehicle.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] A connecting mechanism, comprising:

[0007] A connecting assembly includes a connector, a switching component, and a stop component. Along the axial direction of the connector, the stop component and the switching component are sequentially disposed on the connector, and the switching component is slidably connected to the connector. The switching component has a first guide surface and a second guide surface on its two sides, with the second guide surface facing away from the stop component. The stop component has a groove on its side facing the switching component that matches the switching component.

[0008] A locking assembly, comprising a locking member and a first elastic member, the first elastic member causing the locking member to always have a tendency to move toward the connector.

[0009] According to the above technical means, since the switching component and the connecting component are slidably connected, the relative position between the switching component and the stop component can be changed; the two sides of the switching component are respectively provided with a first guide surface and a second guide surface, and the second guide surface is set away from the stop component; the side of the stop component facing the switching component has a groove that matches the switching component. When the switching component slides to the contact state with the stop component, part of the switching component can be embedded in the groove of the stop component, so that the two form a tight fit. When the locking component needs to limit the movement of the connecting component, there is a distance between the stop and the switching component to facilitate the insertion of the locking component, which restricts the movement of the connecting component and prevents the connecting component from separating from the traction assembly. When it is necessary to release the locking component from the connecting component, simply move the entire connecting component to the left (forward movement) so that the bottom of the locking component passes over the switching component under the action of the first guide surface; then move the entire connecting component to the right (reverse movement) so that the switching component approaches the stop under the pushing action of the bottom of the locking component, and the left side of the switching component is embedded in the groove of the stop, so that the stop and the switching component fit tightly; then apply force to pull the connecting component to the right, and the locking component overcomes the elastic force of the first elastic component under the action of the second guide surface, moves away from the connecting component, and smoothly passes over the switching component and the stop under the action of inertia, releasing the locking component from the connecting component. The separation of the connecting component from the traction assembly can be achieved simply by operating the connecting component.

[0010] Furthermore, along the direction from the stop member to the switching member, the first guide surface is gradually widened, and the second guide surface is gradually narrowed.

[0011] According to the above technical means, when the end of the locking member contacts the first guide surface, it can move away from the connecting member under the action of the first guide surface, thereby overcoming the elastic force applied to the locking member by the first elastic member; when the connecting member drives the switching member to move forward, after the locking member passes the first guide surface, the gradually narrowing second guide surface will not block the end of the locking member, so that the end of the locking member facing the connecting member can smoothly pass the switching member and move to the right side of the switching member; when the connecting member drives the switching member to move in the opposite direction, the end of the locking member contacts the second guide surface and pushes the switching member towards the stop member until the switching member and the stop member are in contact. At this time, along the moving direction from the switching member to the stop member, the second guide surface is gradually widened, which can push the end of the locking member, so that the locking member moves away from the connecting member and smoothly passes the switching member and the stop member under the action of inertia, thereby realizing the release of the locking state of the locking assembly and the connecting assembly.

[0012] Furthermore, in the radial direction of the connector, the maximum outer diameter of the second guide surface is greater than or equal to the maximum outer diameter of the stop.

[0013] According to the above technical means, when the locking assembly and the connecting assembly are in the unlocked state, when the connecting piece is pulled out, even if the pulling speed is small, because the maximum outer diameter of the second guide surface is greater than or equal to the maximum outer diameter of the stop piece, the bottom end of the locking piece (i.e. the end towards the connecting piece) can pass over the stop piece when passing over the second guide surface, thereby avoiding the bottom end of the locking piece being blocked by the stop piece when passing over the switching piece, and avoiding returning to the locked state again.

[0014] Further, the side of the stop piece away from the switching piece is provided with a third guide surface, and the third guide surface is arranged in a gradually widening manner along the direction from the stop piece to the switching piece.

[0015] According to the above technical means, when the locking piece is located on the side of the stop piece away from the switching piece, and the connecting piece is slowly moved in the forward direction as a whole, the bottom end of the locking piece can be slowly moved to the fitting gap between the stop piece and the switching piece under the guidance of the first guide surface, and then the switching piece is pushed away from the stop piece by the locking piece, so that the bottom end of the locking piece is embedded between the stop piece and the switching piece, and the locked state can be reached.

[0016] Further, the connecting assembly further comprises a sliding limiting piece, the sliding limiting piece is arranged on the connecting piece, and the sliding limiting piece is located on the side of the switching piece away from the stop piece, and there is a preset distance between the stop piece and the sliding limiting piece.

[0017] According to the above technical means, the preset distance corresponds to the sliding stroke of the switching piece, and the sliding limiting piece can be used to apply a supporting reaction force to the switching piece when the locking piece moves from the first guide surface of the switching piece to the second guide surface, so that the switching piece and the connecting piece remain relatively stationary, and the locking piece can be conveniently switched between the two sides of the switching piece, that is, from the side of the switching piece close to the stop piece to the side of the switching piece away from the stop piece.

[0018] Further, the end of the locking piece towards the connecting piece is provided with an inclined matching surface.

[0019] According to the above technical means, the inclined matching surface facilitates the end of the locking piece towards the connecting piece to contact and match with the first guide surface, the second guide surface and the third guide surface respectively; the inclined matching surface can form a sharp ridge line at the end of the locking piece towards the connecting piece, and when the locking piece moves slowly along the third guide surface, the sharp ridge line can be inserted into the fitting gap between the stop piece and the switching piece, thereby facilitating the locking piece to be embedded between the stop piece and the switching piece, and the stop piece and the switching piece are separated by the locking piece, so that the locked state is reached.

[0020] Further, the connecting mechanism further comprises a connecting seat assembly, the connecting seat assembly comprises a seat body, a first sliding cavity and a traction connecting hole are arranged in the seat body, the axis of the first sliding cavity intersects with the axis of the traction connecting hole, and the first sliding cavity communicates with the traction connecting hole; the connecting piece is slidingly arranged in the first sliding cavity.

[0021] According to the above technical means, the connecting piece can be slidingly guided through the first sliding cavity, when the traction rod of the traction assembly extends into the traction connecting hole, the communication between the first sliding cavity and the traction connecting hole can make the plug-in end of the connecting piece extend into the traction connecting hole and be connected with the traction rod of the traction assembly, so as to realize the connection of the traction device.

[0022] Further, the connecting assembly further comprises a second elastic piece, the second elastic piece is abutted between the stop piece and the inner wall of the first sliding cavity, so that the stop piece always has a tendency to move away from the traction connecting hole.

[0023] According to the above technical means, when the locking piece is abutted on the side of the stop piece away from the traction connecting hole, the reliable abutment between the stop piece and the locking piece can be realized through the elastic force of the second elastic piece, so as to maintain reliable locking function and ensure stable connection state of the traction device. When the locking piece is located on the side of the switching piece away from the stop piece, the elastic force of the second elastic piece can apply a pushing force to the stop piece and the connecting piece when the second elastic piece is compressed, so that the operator can separate the locking assembly and the connecting assembly more easily.

[0024] Further, the connecting seat assembly further comprises a first limiting piece, the first limiting piece is detachably connected to one end of the first sliding cavity, and the end of the connecting piece away from the traction connecting hole extends out of the first limiting piece.

[0025] According to the above technical means, the first limiting piece is detachably connected to one end of the first sliding cavity, so that the opening and closing of the first sliding cavity can be realized, and the assembly of the connecting assembly in the seat body (i.e. in the first sliding cavity) can be facilitated.

[0026] Further, a second sliding cavity is arranged in the seat body, the axis of the second sliding cavity intersects with the axis of the first sliding cavity, and the second sliding cavity communicates with the first sliding cavity; the locking piece is slidingly arranged in the second sliding cavity.

[0027] According to the above technical means, the locking piece can be slidingly limited through the second sliding cavity, the second sliding cavity communicates with the first sliding cavity, so that the end of the locking piece towards the connecting piece can extend into the first sliding cavity and cooperate with the stop piece and the switching piece, thereby realizing the locking and separation between the connecting assembly and the locking assembly.

[0028] Further, the connecting seat assembly further comprises a second limiting piece, which is detachably connected to one end of the second sliding cavity, and the first elastic piece is in abutment between the locking piece and the second limiting piece.

[0029] According to the above technical means, the second limiting piece is detachably connected to one end of the second sliding cavity, so that the opening and closing of the second sliding cavity can be realized, and the assembly of the locking assembly in the seat body (i.e. in the second sliding cavity) is facilitated; the first elastic piece is in abutment between the locking piece and the second limiting piece, the second limiting piece can apply a counterforce to the first elastic piece, and the first elastic piece will have a tendency to move towards the connecting piece after being compressed, thereby realizing the cooperation of the locking piece with the stop piece and the switching piece.

[0030] Further, the connecting mechanism further comprises a traction assembly, the traction assembly comprises a traction rod, the traction rod is inserted into the traction connecting hole, the traction rod is provided with a plug-in hole, and the end of the connecting piece close to the traction connecting hole is matched with the plug-in hole.

[0031] According to the above technical means, the connecting piece is inserted into the plug-in hole to realize the fixation of the traction rod in the seat body, thereby realizing the connection between the connecting seat assembly and the traction assembly, and the locking piece in the locking assembly is embedded between the stop piece and the switching piece during the process of inserting the connecting piece into the plug-in hole, thereby forming the locking of the connecting piece, so that the connecting piece can be stably inserted into the plug-in hole of the traction rod, and the connection state between the connecting seat assembly and the traction assembly is maintained.

[0032] A traction device comprises the above connecting mechanism.

[0033] According to the above technical means, the connection between the traction component and the towed component can be realized by the traction device, thereby realizing the traction and dragging of the traction component to the towed component.

[0034] A trailer vehicle comprises the above traction device.

[0035] According to the above technical means, the traction device can be used to realize the connection between the vehicle head and the vehicle compartment, between two adjacent vehicle compartments, or between the trailer and the motor home, thereby realizing the traction and dragging of the front traction component (such as the vehicle head, the front vehicle compartment or the trailer) to the rear towed component (such as the rear vehicle compartment or the motor home).

[0036] The beneficial effects of the present application are as follows:

[0037] (1) In the entire separation process of the traction device, this application only requires operating the connecting piece to move the connecting piece back and forth along its axis once, which can simultaneously release the locking component from the connecting component and the connection between the traction component and the connecting component; there is no need to pull the locking piece to overcome the elastic force of the first elastic component. In the separation process of the traction device, the separation of the traction device can be achieved by operating the connecting piece with one hand, which can not only reduce the labor intensity of the operator, but also reduce the separation difficulty of the traction device and improve the separation efficiency of the traction device.

[0038] (2) By cooperating with the locking component, the stop component and the switching component, the connecting component and the locking component can be cyclically switched between the locked state and the separated state by repeatedly pushing and pulling the connecting component. The traction device can be quickly and easily connected and separated by simply pushing and pulling the connecting component.

[0039] (3) The connection mechanism of this application has a simple structure and reliable performance, and can be widely used for traction connection of various vehicle models; the components in the connection mechanism are easy to disassemble and assemble. If a part is damaged by external force during use, the damaged part can be replaced separately, which reduces maintenance costs and saves resources. Attached Figure Description

[0040] Figure 1 A schematic diagram illustrating the locking state of the connecting component and the locking component provided in an embodiment of this application;

[0041] Figure 2 A schematic diagram showing the state of the connecting component and locking component before separation, as provided in an embodiment of this application;

[0042] Figure 3 A schematic diagram showing the state of the connecting component and locking component after separation, as provided in an embodiment of this application.

[0043] Figure 4 Schematic diagram of the structure of the connection component provided in the embodiments of this application Figure 1 ;

[0044] Figure 5 Schematic diagram of the structure of the connection component provided in the embodiments of this application Figure 2 ;

[0045] Figure 6 A front view of the connecting assembly provided in the embodiment of this application when the switching member and the stop member are in contact;

[0046] Figure 7 The following are provided for the embodiments of this application: Figure 6 Sectional view of AA;

[0047] Figure 8 This is a schematic diagram of the structure of the switching component provided in the embodiments of this application;

[0048] Figure 9 A structure diagram of a locking member provided for an embodiment of the present application is shown in the figure;

[0049] Figure 10 A partial structure diagram of a connecting mechanism provided for an embodiment of the present application is shown in the figure;

[0050] Figure 11 A structure diagram of a connecting mechanism provided for an embodiment of the present application is shown in the figure; Figure 10 A top view of the connecting mechanism provided for an embodiment of the present application is shown in the figure;

[0051] Figure 12 A sectional view of the connecting mechanism provided for an embodiment of the present application along B-B in the figure; Figure 11 Figure 1 ;

[0052] Figure 13 A sectional view of the connecting mechanism provided for an embodiment of the present application along B-B in the figure; Figure 11 Figure 2 ;

[0053] Figure 14 A sectional view of the connecting mechanism provided for an embodiment of the present application along B-B in the figure; Figure 11 Figure 3 ;

[0054] Figure 15 A partial structure diagram of a connecting seat assembly provided for an embodiment of the present application is shown in the figure;

[0055] Figure 16 A top view of the connecting seat assembly provided for an embodiment of the present application is shown in the figure; Figure 15

[0056] Figure 17 A sectional view of the connecting seat assembly provided for an embodiment of the present application along C-C in the figure; Figure 16

[0057] Figure 18 A structure diagram of a first limiting member provided for an embodiment of the present application is shown in the figure;

[0058] Figure 19 A structure diagram of a traction assembly provided for an embodiment of the present application is shown in the figure;

[0059] Figure 20 A connection diagram of a connecting assembly, a locking assembly and a traction assembly provided for an embodiment of the present application is shown in the figure;

[0060] Figure 21 A structure diagram of a traction device provided for an embodiment of the present application is shown in the figure.

[0061] ​​​​​Wherein, 1-connection assembly; 11-connector; 111-plug end; 112-operation end; 113-mounting groove; 12-switching piece; 121-first guide surface; 122-second guide surface; 123-first through hole; 13-stop piece; 131-groove; 132-third guide surface; 14-sliding limiting piece; 15-second elastic piece;

[0062] 2-locking assembly; 21-locking piece; 211-mating surface; 212-limiting shaft shoulder; 22-first elastic piece;

[0063] 3-connection seat assembly; 31-seat body; 32-first sliding cavity; 33-pulling connection hole; 34-first limiting piece; 341-threaded portion; 342-second through hole; 343-nut portion; 35-second sliding cavity; 36-second limiting piece; 37-first connecting plate;

[0064] 4-pulling assembly; 41-pulling rod; 411-plug hole; 42-pulling seat; 43-second connecting plate;

[0065] 5-connection frame assembly. DETAILED DESCRIPTION

[0066] Other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present specification. The present application can also be implemented or applied by means of other different specific embodiments, and various modifications or changes can be made to the details of the present specification based on different views and applications, without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, but not for limiting the protection scope of the present application.

[0067] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and only the components related to the present application are shown in the drawings, but not drawn according to the number, shape and size of the components in actual implementation. The type, number and proportion of each component in actual implementation can be arbitrarily changed, and the layout type of the components can be more complex.

[0068] Please refer to Figures 1 to 21 The first aspect of the present embodiment proposes a connection mechanism, which comprises a connection assembly 1 and a locking assembly 2, as shown in Figure 1 and Figure 2 , wherein the connection assembly 1 is used to connect with a pulling assembly 4 in the connection mechanism, so as to realize the connection between the pulling component and the pulled component, and the locking assembly 2 is used to limit the connection assembly 1, so as to prevent the connection assembly 1 from being separated from the pulling assembly 4 during the pulling process.

[0069] The connecting assembly 1 comprises a connecting piece 11, a switching piece 12 and a stop piece 13, which are sequentially arranged on the connecting piece 11 along the axial direction of the connecting piece 11, and the switching piece 12 is in sliding connection with the connecting piece 11, so that the relative position between the switching piece 12 and the stop piece 13 can be changed, as shown in Figure 1 and Figure 2 The two sides of the switching piece 12 are respectively provided with a first guide surface 121 and a second guide surface 122, and the second guide surface 122 is arranged away from the stop piece 13; the side of the stop piece 13 facing the switching piece 12 is provided with a groove 131 matched with the switching piece 12, and when the switching piece 12 slides to the state of contacting the stop piece 13, part of the switching piece 12 can be embedded in the groove 131 of the stop piece 13, so that the switching piece 12 and the stop piece 13 are tightly fitted, as shown in Figure 4 and Figure 5 .

[0070] The locking assembly 2 comprises a locking piece 21 and a first elastic piece 22, and the first elastic piece 22 always has a tendency to move towards the connecting piece 11, as shown in Figure 1 and Figure 2 .

[0071] When the locking piece 21 needs to limit the connecting piece 11, there is a distance between the stop piece 13 and the switching piece 12, so that the locking piece 21 can be inserted, as shown in Figure 1 , so as to limit the movement of the connecting piece 11 to the right side of Figure 1 , and prevent the connecting piece 11 from being separated from the traction assembly 4; when the locking state of the locking assembly 2 on the connecting assembly 1 needs to be released, the connecting assembly 1 is first moved to the left (forward movement) as a whole, so that the bottom of the locking piece 21 passes over the switching piece 12 under the action of the first guide surface 121; then the connecting assembly 1 is moved to the right (reverse movement) as a whole, so that the switching piece 12 is close to the stop piece 13 under the pushing action of the bottom of the locking piece 21, and the left side of the switching piece 12 is embedded in the groove 131 of the stop piece 13, so that the stop piece 13 and the switching piece 12 are tightly fitted, as shown in Figure 2 ; then the connecting piece 11 is pulled to the right side by force, the locking piece 21 moves away from the connecting piece 11 under the action of the second guide surface 122 and overcomes the elastic force of the first elastic piece 22, and moves smoothly over the switching piece 12 and the stop piece 13 under the action of inertia, so as to release the locking effect of the locking piece 21 on the connecting assembly 1, and only the connecting piece 11 needs to be operated to realize the separation of the connecting piece 11 from the traction assembly 4.

[0072] It should be noted that during the entire separation process, only the connecting member 11 needs to be operated to move it back and forth along its axis once, which can simultaneously release the locking component 2 from the connecting component 1 and the connection between the traction component 4 and the connecting component 1. There is no need to pull the locking member 21 to overcome the elastic force of the first elastic member 22. During the separation process of the traction device, the separation of the traction device can be achieved by using only one hand. This not only reduces the labor intensity of the operator, but also reduces the difficulty of separating the traction device and improves the separation efficiency of the traction device.

[0073] In some embodiments of this application, the stop 13 is fixedly disposed on the connector 11 and can cooperate with the locking member 21 to achieve unidirectional sliding limit of the connector 11. When the locking member 21 abuts against the right side of the stop 13, it can prevent the connector 11 from sliding to the right. The stop 13 can be fixedly disposed on the connector 11 by welding, snap-fitting, or other methods, or it can be integrally disposed with the connector 11, such as... Figure 6 and Figure 7 As shown, all of them can achieve the purpose of this application.

[0074] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 8 Along the direction from the stop member 13 to the switching member 12, the first guide surface 121 is gradually widened. When the end of the locking member 21 contacts the first guide surface 121, it can move away from the connecting member 11 under the action of the first guide surface 121, thereby overcoming the elastic force exerted by the first elastic member 22 on the locking member 21. The second guide surface 122 is gradually narrowed. When the connecting member 11 drives the switching member 12 towards... Figure 1 When the locking member 21 moves to the left, after it passes the first guide surface 121, the gradually tapering second guide surface 122 will not obstruct the end of the locking member 21, so that the end of the locking member 21 facing the connecting member 11 can smoothly pass the switching member 12 and move to the right side of the switching member 12, such as Figure 2 As shown. When the connecting piece 11 drives the switching piece 12 toward... Figure 2 When the middle right side moves, the end of the locking member 21 contacts the second guide surface 122 and pushes the switching member 12 toward the stop member 13 until the switching member 12 and the stop member 13 are in contact. At this time, the second guide surface 122 is gradually widened along the direction from the switching member 12 to the stop member 13, which can push the end of the locking member 21, so that the locking member 21 moves away from the connecting member 11 and smoothly passes over the switching member 12 and the stop member 13 under the action of inertia, thereby realizing the release of the locking state between the locking component 2 and the connecting component 1.

[0075] It should be noted that the first guide surface 121 and the second guide surface 122 can be a conical surface, an inclined surface, a spherical surface or a curved surface, as long as the position switching of the locking piece 21 on both sides of the switching piece 12 can be achieved by the guiding effect, the purpose of the present application can be achieved.

[0076] In some embodiments of the present application, please refer to Figure 1 、 Figure 4 and Figure 8 , the first guide surface 121 and the second guide surface 122 are symmetrically arranged on both sides of the switching piece 12, so that the switching piece 12 can play a guiding role and switching role of the position of the locking piece 21 when assembled to the connecting piece 11 without distinguishing the front and back, which can improve the assembly efficiency between the switching piece 12 and the connecting piece 11.

[0077] As a specific embodiment of the present application, please refer to Figure 1 、 Figure 4 and Figure 8 The first guide surface 121 and the second guide surface 122 are both conical surfaces coaxially arranged with the connecting piece 11, and any area on the circumference of the conical surface can play a guiding role, so that the switching piece 12 does not need to be circumferentially assembled and positioned when assembled to the connecting piece 11, which can improve the assembly efficiency between the switching piece 12 and the connecting piece 11.

[0078] In some embodiments of the present application, please refer to Figure 6 、 Figure 7 and Figure 8 The switching piece 12 has a first through hole 123 coaxially arranged with the connecting piece 11, so as to facilitate the sliding of the switching piece 12 along the axis of the connecting piece 11, thereby changing the relative position between the switching piece 12 and the locking piece 21 and the stop piece 13.

[0079] In some embodiments of the present application, please refer to Figure 5 、 Figure 6 and Figure 7 In the radial direction of the connecting piece 11, the maximum outer diameter of the second guide surface 122 is greater than or equal to the maximum outer diameter of the stop piece 13, and when the locking state of the locking assembly 2 and the connecting assembly 1 is released, when the connecting piece 11 is pulled out to the right from Figure 2 state, even if the pulling-out speed is small, since the maximum outer diameter of the second guide surface 122 is greater than or equal to the maximum outer diameter of the stop piece 13, the bottom end of the locking piece 21 (i.e. the end towards the connecting piece 11) can pass over the stop piece 13 when passing over the second guide surface 122, thereby avoiding the bottom end of the locking piece 21 being blocked by the stop piece 13 when passing over the switching piece 12, and avoiding returning to the locking state again.

[0080] In some preferred embodiments of the present application, please refer to Figure 5 、 Figure 6 andFigure 7 The maximum outer diameter of the second guide surface 122 is the outer diameter of the end portion close to the stopper 13, the maximum outer diameter of the stopper 13 is the outer diameter of the end portion close to one end of the switching piece 12, and the maximum outer diameter of the second guide surface 122 is greater than the maximum outer diameter of the stopper 13. When the switching piece 12 and the stopper 13 form a close-fitting state, once the bottom end of the locking piece 21 passes over the switching piece 12 under the action of the second guide surface 122, it can also pass over the stopper 13.

[0081] In some embodiments of the present application, referring to Figure 1 , Figure 3 and Figure 4 , the side of the stopper 13 away from the switching piece 12 is provided with a third guide surface 132, which is gradually widened in the direction from the stopper 13 to the switching piece 12. When the locking piece 21 is located on the side of the stopper 13 away from the switching piece 12, and the connecting piece 11 is slowly moved to the left side of Figure 3 , the bottom end of the locking piece 21 can be slowly moved to the close-fitting gap between the stopper 13 and the switching piece 12 under the guiding action of the first guide surface 121, and then the switching piece 12 is pushed away from the stopper 13 by the locking piece 21, so that the bottom end of the locking piece 21 is embedded between the stopper 13 and the switching piece 12, as shown in Figure 1 , to achieve a locked state.

[0082] It can be understood that the present application can make the connecting assembly 1 and the locking assembly 2 form a cyclic switching between the locked state and the separated state by repeatedly pushing and pulling the connecting piece 11. If the state shown in Figure 3 is the initial state, the connecting piece 11 is first pushed slowly to the left to be inserted into the traction assembly 4, and at the same time, the bottom end of the locking piece 21 is inserted between the stopper 13 and the switching piece 12 under the action of the first guide surface 121, and the locking piece 21 forms a lock with the stopper 13, as shown in Figure 1 , to prevent the connecting piece 11 from moving to the right. When the separation of the traction device needs to be performed, the connecting piece 11 is continuously pushed to the left, so that the bottom end of the locking piece 21 passes over the switching piece 12 under the action of the first guide surface 121; then the connecting piece 11 is pulled to the right in reverse, and the switching piece 12 is in close contact with the stopper 13 under the pushing action of the locking piece 21, as shown in Figure 2 , the connecting piece 11 is continuously pulled to the right, so that the bottom end of the locking piece 21 passes over the switching piece 12 and the stopper 13 under the action of the second guide surface 122, and returns to the initial state shown in Figure 3 . The traction device can be quickly and conveniently connected and separated by only pushing and pulling the connecting piece 11.

[0083] In the above embodiment, in order to facilitate the movement of the bottom end of the locking piece 21 from the first guide surface 121 to the second guide surface 122 of the switching piece 12, a limiting structure can be arranged on the side of the switching piece 12 away from the stop piece 13 to limit the sliding stroke of the switching piece 12, so that when the bottom end of the locking piece 21 passes the switching piece 12, the switching piece 12 can remain relatively stationary with the connecting piece 11. The limiting structure can be achieved by designing the connecting piece 11 to have a variable cross-section, for example, the diameter of the connecting piece 11 on the side of the switching piece 12 away from the stop piece 13 can be configured to be larger than the diameter of the first through hole 123. Alternatively, a limiting component can be arranged on the side of the switching piece 12 away from the stop piece 13 to limit the sliding stroke of the switching piece 12, which can also achieve the purpose of the present application.

[0084] In some embodiments of the present application, referring to Figure 1 , Figure 2 , Figure 4 , the connecting assembly 1 further comprises a sliding limiting piece 14 arranged on the connecting piece 11, and the sliding limiting piece 14 is located on the side of the switching piece 12 away from the stop piece 13. There is a predetermined distance between the stop piece 13 and the sliding limiting piece 14, which corresponds to the sliding stroke of the switching piece 12. The sliding limiting piece 14 can limit the sliding of the switching piece 12. When the locking piece 21 moves from the first guide surface 121 to the second guide surface 122 of the switching piece 12, the sliding limiting piece 14 can exert a supporting reaction force on the switching piece 12 to keep the switching piece 12 relatively stationary with the connecting piece 11, facilitating the movement of the locking piece 21 from the side of the switching piece 12 close to the stop piece 13 to the side of the switching piece 12 away from the stop piece 13, and achieving the position switching of the locking piece 21 on both sides of the switching piece 12.

[0085] In some embodiments of the present application, referring to Figure 4 , Figure 5 , in order to facilitate the assembly of the switching piece 12, the sliding limiting piece 14 and the connecting piece 11 are preferably detachably connected. The connecting piece 11 is provided with a mounting groove 113 for mounting the sliding limiting piece 14, which can achieve the mounting and fixing of the sliding limiting piece 14.

[0086] In some embodiments of the present application, the sliding limiting piece 14 is a ring-shaped stop ring. When the material of the ring-shaped stop ring is elastic, the assembly between the ring-shaped stop ring and the connecting piece 11 can be achieved by deformation of the ring-shaped stop ring. When the material of the ring-shaped stop ring is rigid, the ring-shaped stop ring can be formed by surrounding a plurality of arc-shaped monomers.

[0087] In some embodiments of the present application, referring to Figure 1 , Figure 2 , Figure 3 , Figure 9The locking piece 21 has a matching surface 211 arranged obliquely at one end of the connecting piece 11, facilitating the contact and cooperation of the one end of the locking piece 21 with the first guide surface 121, the second guide surface 122 and the third guide surface 132 respectively; the matching surface 211 is arranged obliquely, so that a sharp ridge line is formed at the one end of the locking piece 21, and when the locking piece 21 moves slowly along the third guide surface 132, the sharp ridge line can be inserted into the fitting gap between the stop piece 13 and the switching piece 12, facilitating the embedding of the locking piece 21 between the stop piece 13 and the switching piece 12, separating the stop piece 13 and the switching piece 12 by the locking piece 21, so as to reach the locking state.

[0088] In some embodiments of the present application, please refer to Figure 9 The matching surface 211 is a plane arranged obliquely relative to the axis of the locking piece 21, so that the one end of the locking piece 21 is a sharp end, facilitating the separation of the stop piece 13 and the switching piece 12 in the fitting state by the sharp end of the locking piece 21.

[0089] In some embodiments of the present application, please refer to Figures 10 to 17 The connecting mechanism further comprises a connecting seat assembly 3, the connecting seat assembly 3 comprising a seat body 31, the seat body 31 having a first sliding cavity 32 and a traction connecting hole 33 formed inside, the axis of the first sliding cavity 32 intersecting the axis of the traction connecting hole 33, and the first sliding cavity 32 being in communication with the traction connecting hole 33; the connecting piece 11 being slidingly arranged inside the first sliding cavity 32, and being slidingly guided by the first sliding cavity 32, when the traction rod 41 of the traction assembly 4 extends into the traction connecting hole 33, the communication between the first sliding cavity 32 and the traction connecting hole 33 enables the insertion end 111 of the connecting piece 11 to extend into the traction connecting hole 33 and be connected with the traction rod 41 of the traction assembly 4, so as to realize the connection of the traction device, as shown in Figure 13 、 Figure 14 、 Figure 20 and Figure 21 (not shown in Figure 20 for easy observation, the seat body 31 of the connecting seat assembly 3 is not shown).

[0090] In some embodiments of the present application, please refer to Figures 12 to 14The connecting assembly 1 further comprises a second elastic member 15 abutting between the stop member 13 and the inner wall of the first sliding cavity 32, so that the stop member 13 always has a tendency to move away from the traction connecting hole 33. When the locking member 21 abuts on the side of the stop member 13 away from the traction connecting hole 33, reliable abutment between the stop member 13 and the locking member 21 can be achieved, thereby maintaining a reliable locking function and ensuring a stable connection state of the traction device. When the locking member 21 is located on the side of the switching member 12 away from the stop member 13, the second elastic member 15 is compressed, and when the operator pulls the connecting member 11 to the right, the elastic force of the second elastic member 15 can apply a rightward pushing force to the stop member 13 and the connecting member 11, thereby making the operator more labor-saving when separating the locking assembly 2 and the connecting assembly 1.

[0091] In some embodiments of the present application, please refer to Figures 11 to 15 The connecting seat assembly 3 further comprises a first limiting member 34 detachably connected to one end of the first sliding cavity 32, which can realize the opening and closing of the first sliding cavity 32, thereby facilitating the assembly of the connecting assembly 1 in the seat body 31 (i.e. in the first sliding cavity 32). Specifically, the assembled connecting assembly 1 is loaded from the right opening of the first sliding cavity 32, and then the first limiting member 34 is installed on the right opening of the first sliding cavity 32.

[0092] The end of the connecting member 11 away from the traction connecting hole 33 extends out of the first limiting member 34, which facilitates the operator to push and pull the connecting member 11, thereby forming a cyclic switching between the locking state and the separation state of the connecting assembly 1 and the locking assembly 2. Specifically, the end of the connecting member 11 extending out of the first limiting member 34 is an operating end 112, as shown in Figure 5 、 Figures 11 to 14

[0093] In some embodiments of the present application, please refer to Figures 10 to 17 The seat body 31 further comprises a second sliding cavity 35, the axis of the second sliding cavity 35 intersects with the axis of the first sliding cavity 32, and the second sliding cavity 35 is in communication with the first sliding cavity 32; the locking member 21 is slidingly arranged in the second sliding cavity 35, and the second sliding cavity 35 can slidingly limit the locking member 21; the second sliding cavity 35 is in communication with the first sliding cavity 32, which facilitates the end of the locking member 21 extending into the first sliding cavity 32 to cooperate with the stop member 13 and the switching member 12, thereby realizing the locking and separation between the connecting assembly 1 and the locking assembly 2.

[0094] In some embodiments of the present application, please refer to Figures 15 to 17 ​, the axis of the traction connecting hole 33 and the axis of the first sliding cavity 32 are perpendicular in a horizontal plane, the axis of the first sliding cavity 32 and the axis of the second sliding cavity 35 are perpendicular in a vertical plane, when the traction device is connected, the traction rod 41 of the traction assembly 4 is first inserted into the traction connecting hole 33, the plug-in end 111 of the connecting piece 11 is inserted into the traction rod 41 from the left side of the traction connecting hole 33, at the same time, the locking piece 21 is inserted between the stop piece 13 and the switching piece 12 under the action of the third guide surface 132, forming a locking state, so that the connecting seat assembly 3 and the traction assembly 4 are connected. When the traction device is separated, first push the connecting piece 11 to the left, the locking piece 21 passes the switching piece 12 under the action of the first guide surface 121, then pull the connecting piece 11 to the right, the locking piece 21 passes the switching piece 12 and the stop piece 13 under the action of the second guide surface 122, so that the connecting piece 11 can be pulled out to the right, the plug-in end 111 is withdrawn from the traction connecting hole 33, the connection between the traction rod 41 and the connecting seat assembly 3 is released, and the traction device is separated.

[0095] In some embodiments of the present application, please refer to Figures 10 to 14 The connecting seat assembly 3 further comprises a second limiting piece 36, which is detachably connected to one end of the second sliding cavity 35, and can realize the opening and closing of the second sliding cavity 35, facilitating the assembly of the locking assembly 2 in the seat body 31 (i.e. in the second sliding cavity 35); specifically, the assembled locking assembly 2 is loaded from the top opening of the second sliding cavity 35, and then the second limiting piece 36 is installed on the top opening of the second sliding cavity 35.

[0096] The first elastic piece 22 abuts between the locking piece 21 and the second limiting piece 36, and the second limiting piece 36 can apply a counterforce to the first elastic piece 22, so that the first elastic piece 22 is compressed and the locking piece 21 always has a tendency to move towards the connecting piece 11, thereby realizing the cooperation of the locking piece 21 with the stop piece 13 and the switching piece 12.

[0097] In some embodiments of the present application, in order to realize the abutment of the first elastic piece 22, a limiting shaft shoulder 212 is arranged on the locking piece 21, the first elastic piece 22 is sleeved outside the locking piece 21, one end abuts against the limiting shaft shoulder 212, and the other end abuts against the second limiting piece 36, so that the first elastic piece 22 is in a pre-compressed state.

[0098] In some embodiments of the present application, in order to avoid interference of the second limiting piece 36 with the sliding of the locking piece 21, an end of the locking piece 21 away from the connecting piece 11 penetrates through the second limiting piece 36, as shown in Figures 10 to 14

[0099] ​It should be noted that the first limiting piece 34 and the second limiting piece 36 can be installed on the seat body 31 in a threaded connection or a clamping connection manner, and both can achieve the purpose of the present application.

[0100] In some embodiments of the present application, referring to Figures 10 to 18 , the first limiting piece 34 and the second limiting piece 36 are the same in structure and can be respectively set in size according to the first sliding cavity 32 and the second sliding cavity 35. Taking the first limiting piece 34 as an example for structural description, the first limiting piece 34 includes a threaded part 341 and a nut part 343, the threaded part 341 is used for threaded connection with the inner wall at the opening of the first sliding cavity 32, and the nut part 343 is convenient for cooperation with a wrench or other operating tools to realize installation of the first limiting piece 34. The first limiting piece 34 further includes a second through hole 342 coaxially arranged with the connecting piece 11, so as to facilitate the operating end 112 of the connecting piece 11 to extend out of the second through hole 342, thereby facilitating the operator to push and pull the connecting piece 11.

[0101] In some embodiments of the present application, referring to Figures 19 to 21 , the connecting mechanism further includes a traction assembly 4, the traction assembly 4 includes a traction rod 41, the traction rod 41 is inserted into the traction connecting hole 33, and the traction rod 41 is provided with a plug-in hole 411. The end of the connecting piece 11 close to the traction connecting hole 33 (i.e. the plug-in end 111) is matched with the plug-in hole 411, so that the connecting piece 11 can be inserted into the plug-in hole 411 to realize fixation of the traction rod 41 in the seat body 31, thereby realizing connection between the connecting seat assembly 3 and the traction assembly 4. The locking piece 21 in the locking assembly 2 is embedded between the stop piece 13 and the switching piece 12 in the process of inserting the connecting piece 11 into the plug-in hole 411, forming locking of the connecting piece 11, so that the connecting piece 11 can be stably inserted into the plug-in hole 411 of the traction rod 41, maintaining the connection state between the connecting seat assembly 3 and the traction assembly 4.

[0102] In some embodiments of the present application, the connecting seat assembly 3 is arranged on one of the traction part and the towed part, and the traction assembly 4 is arranged on the other of the traction part and the towed part. Through the connection between the connecting seat assembly 3 and the traction assembly 4, the connection between the traction part and the towed part can be realized.

[0103] In some embodiments of the present application, referring to Figure 10 , the connecting seat assembly 3 further includes a first connecting plate 37 connected with the seat body 31, and the first connecting plate 37 is provided with a plurality of mounting holes, which can be used to realize fixed arrangement of the connecting seat assembly 3 on the traction part or the towed part.

[0104] In some embodiments of the present application, referring to Figures 19 to 21The traction assembly 4 further comprises a traction seat 42 and a second connecting plate 43; the traction seat 42 is connected with the traction rod 41 and the second connecting plate 43 respectively, and the second connecting plate 43 is provided with a plurality of mounting holes, which can be used to realize the fixed arrangement of the traction assembly 4 on the traction component or the towed component.

[0105] Please refer to Figures 1 to 21 The second aspect of the embodiments of the present application provides a traction device, which comprises the connecting mechanism described in the above embodiments and can be used to realize the connection between the traction component and the towed component, so as to realize the traction and dragging of the towed component by the traction component.

[0106] In some embodiments of the present application, the traction device further comprises a connecting frame assembly 5, which is used to realize the connection between the connecting seat assembly 3 or the traction assembly 4 and the traction component or the towed component. The stress can be dispersed through the connecting frame assembly 5, so as to avoid the stress concentration on the traction component or the towed component, thereby preventing the connecting seat assembly 3 or the traction assembly 4 from falling off.

[0107] Please refer to Figures 1 to 21 The third aspect of the embodiments of the present application provides a trailer vehicle, which comprises the traction device described in the above embodiments. The traction device can be used to realize the connection between the front end and the rear end of the vehicle, the connection between two adjacent vehicle bodies or the connection between the trailer and the motor home, so as to realize the traction and dragging of the rear component (such as the rear vehicle body or the motor home) by the front traction component (such as the front end, the front vehicle body or the trailer).

[0108] In some embodiments of the present application, the trailer vehicle comprises a trailer and a motor home connected by the traction device. The rear bumper assembly of the trailer is configured as the connecting frame assembly 5 of the traction device, which can be used to realize the fixed arrangement of the connecting seat assembly 3; and the traction assembly 4 is fixedly arranged at the front end of the motor home, so that the traction rod 41 of the traction assembly 4 extends into the traction connecting hole 33 of the seat body 31.

[0109] In some embodiments of the present application, please refer to Figures 1 to 21 The connection and separation process of the trailer and the motor home is as follows:

[0110] Step one: pull the operation end 112 of the connecting piece 11, so that the plug-in end 111 of the connecting piece 11 exits the traction connecting hole 33, and reach the state as shown in Figure 12

[0111] Step two: move the trailer close to the motor home, so that the traction rod 41 extends into the traction connecting hole 33, and the axis of the plug-in hole 411 on the traction rod 41 coincides with the axis of the first sliding cavity 32;

[0112] Step three: press the operation end 112, so that the connecting piece 11 is inserted into the traction connecting hole 33, and reach the state as shown in Figure 12 ​Pushing it in from the left side causes the insertion end 111 of the connector 11 to be inserted into the insertion hole 411 of the traction rod 41. Simultaneously, the bottom end of the locking member 21 contacts and engages with the third guide surface 132, causing the locking member 21 to pass over the stop member 13 and embed itself between the stop member 13 and the switching member 12, thus locking the connector 11 and achieving the desired effect. Figure 13 The trailer and RV can be connected once the desired state is displayed.

[0113] Step 4: When it is necessary to separate the trailer from the RV, connect connector 11 to... Figure 12 Continue pushing in from the left, causing the locking member 21 to contact and engage with the first guide surface 121, allowing the locking member 21 to pass over the switching member 12 and reach the desired position. Figure 14 As shown in the diagram; then pull the connector 11 to the right. Under the action of the second guide surface 122, the locking member 21 passes over the switching member 12 and the stop member 13, releasing the sliding lock on the connector 11, allowing the connector 11 to continue to be pulled out to the right, thereby causing the insertion end 111 of the connector 11 to exit from the insertion hole 411 of the traction rod 41, achieving the desired state. Figure 12 In the state shown, disconnecting the tow bar 41 from the connecting seat assembly 3 allows the trailer and RV to be separated.

[0114] This application utilizes the cooperation of the stop 13, the switching component 12, and the locking component 21 in the connecting mechanism. During the entire separation process, only the connecting component 11 needs to be operated to move it back and forth along its axial direction once, which simultaneously releases the locking component 2 from the connecting component 1 and the connection between the traction component 4 and the connecting component 1. There is no need to pull the locking component 21 to overcome the elastic force of the first elastic component 22. During the separation process of the traction device, the separation of the traction device can be achieved by using only one hand. This not only reduces the labor intensity of the operator but also reduces the difficulty of separating the traction device and improves the separation efficiency of the traction device.

[0115] The above embodiments are merely preferred embodiments provided to fully illustrate this application, and the scope of protection of this application is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on this application are all within the scope of protection of this application.

Claims

1. A connection mechanism, characterized in that The utility model relates to a connecting assembly (1), the connecting assembly (1) includes connecting piece (11), switching piece (12) and stop piece (13), along the axial direction of connecting piece (11), stop piece (13) and switching piece (12) are sequentially arranged on connecting piece (11), and switching piece (12) is connected with connecting piece (11) slidingly, both sides of switching piece (12) are equipped with first guide surface (121) and second guide surface (122) respectively, and second guide surface (122) is arranged away from stop piece (13), one side of stop piece (13) towards switching piece (12) has the recess (131) matched with switching piece (12) setting, Locking assembly (2), the locking assembly (2) includes locking piece (21) and first elastic member (22), and the first elastic member (22) makes locking piece (21) always have the tendency of moving towards connecting piece (11). Along the direction of stop piece (13) to switching piece (12), first guide surface (121) is arranged gradually wide, and second guide surface (122) is arranged gradually narrow.

2. The connection mechanism of claim 1, wherein In the radial direction of connecting piece (11), the maximum outer diameter of second guide surface (122) is greater than or equal to the maximum outer diameter of stop piece (13).

3. The connection mechanism of claim 1, wherein, One side of stop piece (13) away from switching piece (12) is equipped with third guide surface (132), along the direction of stop piece (13) to switching piece (12), third guide surface (132) is arranged gradually wide.

4. The connection mechanism of claim 1, wherein The connecting assembly (1) further includes a sliding limiting member (14), the sliding limiting member (14) is arranged on the connecting piece (11), and the sliding limiting member (14) is located on the side of the switching piece (12) away from the stop piece (13), and a preset distance exists between the stop piece (13) and the sliding limiting member (14).

5. The connection mechanism of claim 1, wherein The locking piece (21) has an inclined matching surface (211) at one end towards the connecting piece (11).

6. The connection mechanism according to any one of claims 1 to 5, characterized in that Further comprising a connecting seat assembly (3), the connecting seat assembly (3) includes a seat body (31), a first sliding cavity (32) and a traction connecting hole (33) are arranged inside the seat body (31), the axis of the first sliding cavity (32) intersects with the axis of the traction connecting hole (33), and the first sliding cavity (32) communicates with the traction connecting hole (33); the connecting piece (11) is slidingly arranged inside the first sliding cavity (32).

7. The connection mechanism according to any one of claims 1 to 5, characterized in that The connecting assembly (1) further includes a second elastic member (15), the second elastic member (15) is abutted between the stop piece (13) and the inner wall of the first sliding cavity (32), so that the stop piece (13) always has the tendency of moving away from the traction connecting hole (33).

8. The connection mechanism of claim 7, wherein, ​ 9. The connection mechanism of claim 7, wherein, The connecting seat assembly (3) further comprises a first limiting piece (34) which is detachably connected to one end of the first sliding cavity (32), and the connecting piece (11) extends out of the first limiting piece (34) from the end away from the traction connecting hole (33).

10. The connection mechanism of claim 7, wherein, The seat body (31) is further provided with a second sliding cavity (35) inside, the axis of the second sliding cavity (35) intersects with the axis of the first sliding cavity (32), and the second sliding cavity (35) is in communication with the first sliding cavity (32); and the locking piece (21) is slidingly arranged inside the second sliding cavity (35).

11. The connection mechanism of claim 10, wherein, The connecting seat assembly (3) further comprises a second limiting piece (36) which is detachably connected to one end of the second sliding cavity (35), and the first elastic piece (22) is abutted between the locking piece (21) and the second limiting piece (36).

12. The attachment mechanism of claim 7, wherein, The traction assembly (4) comprises a traction rod (41) which is inserted into the traction connecting hole (33), and the traction rod (41) is provided with an insertion hole (411), and the end of the connecting piece (11) close to the traction connecting hole (33) is arranged to match the insertion hole (411).

13. A traction device characterized by The connecting mechanism comprises any one of claims 1 to 12.

14. A towing vehicle, characterized in that The traction device comprises claim 13.

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