Hanging device for trailer and vehicle

Abstract

The invention provides a hitching device for a trailer and a vehicle. The hitching device for the trailer comprises a mounting frame used for being connected with a vehicle body, and the mounting frame is provided with a driving device, a rotating part used for fixing a trailer hook and a sliding part in transmission connection with the rotating part; the sliding part is driven by the driving device to move between a first position and a second position, and the rotating part rotates along with the movement of the sliding part and enables the trailer hook to rotate between a storage position and an extending position; a first locking structure and a second locking structure are arranged between the sliding part and the rotating part, when the sliding part slides to the first position, the first locking structure is used for locking the tow hook at the storage position, and when the sliding part slides to the second position, the second locking structure is used for locking the tow hook at the extending position. According to the hitching device for the trailer, automatic stretching and storage of the trailer hook can be achieved, the good locking effect is achieved at the stretching position and the storage position, and therefore the use convenience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle parts, and in particular to a trailer hitch device. The present invention also relates to a vehicle provided with the trailer hitch device. Background Art

[0002] Trailer hitches are mainly used to tow RVs, luggage racks, bicycle racks, small trucks, etc. They are the main components for expanding the car's carrying capacity. Their main purpose is to provide convenient and reliable cargo towing solutions for car users who have needs such as camping, traveling, and carrying cargo.

[0003] Existing trailer hitch devices can be divided into three categories according to the installation method: mechanical, semi-automatic and fully automatic. At present, the mechanical type is widely used, but it is limited by the tail shape of the vehicle CAS (Concept A Surface) and needs to be manually disassembled after use. There are disadvantages of multiple disassembly and assembly, and it is not convenient to disassemble and assemble, and the convenience of use is poor. The semi-automatic structure does not require professional personnel to replace it, and it can be hidden inside the tail shape of the vehicle CAS, but because there is no locking mechanism inside, it needs to be manually locked after falling by its own gravity, which has the risk of shaking, stagnation, deflection, etc. In addition, the semi-automatic structure has a high demand for layout space. With the development of chassis intelligence and vehicle electrification, the number of parts arranged at the rear of the lower body of hybrid vehicles and pure electric vehicles has increased, and the layout space has been compressed, making the structural layout of the semi-automatic hitch device more difficult. Summary of the invention

[0004] In view of this, the present invention aims to provide a hitch device for a trailer, so as to improve the locking effect of the trailer hook in the extended and stored states, and to improve the convenience of use.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A trailer hitch device comprises a mounting frame connected to a vehicle body, the mounting frame is provided with a driving device and a rotating member for fixing a trailer hook, and a sliding member drivingly connected to the rotating member;

[0007] The sliding member is driven by the driving device to move between a first position and a second position, and the rotating member rotates with the movement of the sliding member, and causes the trailer hook to rotate between a storage position and an extended position;

[0008] A first locking structure and a second locking structure are provided between the sliding member and the rotating member. When the sliding member slides to the first position, the first locking structure is used to lock the trailer hook in the storage position. When the sliding member slides to the second position, the second locking structure is used to lock the trailer hook in the extended position.

[0009] Furthermore, the sliding member is provided with a rotation driving portion, and the rotating member is provided with a rotation matching portion; the rotation driving portion and the rotation matching portion are transmission-connected.

[0010] Furthermore, the rotation driving portion includes a plurality of grooves provided on the sliding member, and the plurality of grooves are arranged at intervals along the sliding direction of the sliding member; the rotation matching portion includes a plurality of protrusions provided on the rotating member, and the plurality of protrusions are arranged in a circle with the axis of the rotating member as the center; as the sliding member moves, the plurality of protrusions can engage and connect with the corresponding grooves.

[0011] Further, the first locking structure includes a first locking block provided on the rotating member, and a first locking end face provided on the sliding member, and when the sliding member slides to the first position, the first locking block presses against the first locking end face; and / or, the second locking structure includes a second locking block provided on the rotating member, and a second locking end face provided on the sliding member, and when the sliding member slides to the second position, the second locking block presses against the second locking end face.

[0012] Furthermore, a transmission assembly is provided on the mounting frame; the driving device is transmission-connected to the sliding member via the transmission assembly.

[0013] Furthermore, the transmission assembly includes a lead screw rotatably mounted on the mounting frame, the lead screw being connected to the driving device; the sliding member is screwed onto the lead screw, and a guide structure is provided between the sliding member and the mounting frame.

[0014] Furthermore, the guide structure is provided on a first guide end surface on the mounting frame, and a second guide end surface is provided on the sliding member, and the first guide end surface abuts against the second guide end surface; and / or, the transmission assembly also includes a driving gear provided on the power output end of the driving device, and a driven gear provided on the screw, and the driving gear and the driven gear are transmission-connected.

[0015] Furthermore, the mounting frame includes a tow bar for connecting the vehicle body, a connecting bracket arranged on the tow bar, and a tow hook bracket arranged on the tow bar; the sliding member and the rotating member are both arranged on the tow hook bracket, and the tow hook bracket is detachably connected to the connecting bracket.

[0016] Furthermore, the connecting bracket includes a first connecting bracket and a second connecting bracket which are spaced apart on the tow bar; and both ends of the trailer hook bracket are respectively connected to the first connecting bracket and the second connecting bracket.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The trailer hitch device described in the present invention drives the sliding member to move by providing a driving device, and causes the rotating member to rotate with the movement of the sliding member, and the trailer hook is rotated between the storage position and the extended position by the rotation of the rotating member. At the same time, the setting of the first locking structure can lock the trailer hook in the storage position, and the setting of the second locking structure can lock the trailer hook in the extended position, so that the trailer hook has a good locking effect and is also conducive to improving the convenience of use.

[0019] In addition, the rotation driving part and the rotation matching part are connected in transmission, which is convenient for driving the rotating part to rotate through the movement of the sliding part. The rotation driving part and the rotation matching part are connected by meshing with multiple grooves and multiple protrusions, which has the characteristics of simple structure and easy design and implementation, and is also conducive to ensuring the stability of transmission. The first locking structure adopts a first locking block to cooperate with the first locking end face, so that the sliding part can be better locked in the first position, which is conducive to ensuring the stability of the trailer hook in the storage position. The first locking structure adopts a second locking block to cooperate with the second locking end face, so that the sliding part can be better locked in the second position, which is conducive to ensuring the stability of the trailer hook in the extended position.

[0020] Secondly, the arrangement of the transmission assembly is conducive to the arrangement of the drive device, making the structure more compact and the movement more flexible. The transmission member adopts a lead screw and is provided with a guide structure, so that the sliding member is screwed on the lead screw and moves along the axial direction of the lead screw, which not only has a structural arrangement, but also helps to ensure the accuracy of the movement of the sliding member and the rotating member. The abutment and cooperation between the first guide end face provided on the mounting frame and the second guide section provided on the transmission member is conducive to ensuring the smooth movement of the sliding member along the axial direction of the lead screw, and also makes the structure of the transmission assembly more compact.

[0021] Furthermore, the transmission assembly also includes a driving gear and a driven gear, so that the power of the driving device is transmitted to the lead screw via the driving gear and the driven gear, which helps to shorten the overall length of the mounting frame and further makes the structural layout more compact.

[0022] In addition, the setting of the tow bar can facilitate the connection between the mounting frame and the vehicle body, and the tow hook bracket is detachably connected to the connecting bracket arranged on the tow bar, which is conducive to improving the convenience of disassembly and assembly of the tow hook. The connecting bracket adopts a first connecting bracket and a second connecting bracket, so that the two ends of the tow hook bracket are detachably connected to the first connecting bracket and the second connecting bracket respectively, which is convenient for disassembly and assembly of the tow hook bracket, and also facilitates the disassembly and assembly of the tow hook and the transmission assembly.

[0023] Another object of the present invention is to provide a vehicle, wherein the vehicle body is provided with the above-mentioned trailer hitch device.

[0024] The vehicle of the present invention and the trailer hitch as described above have the same beneficial effects as those of the prior art, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a structural schematic diagram of a trailer hitch device according to an embodiment of the present invention from a first perspective;

[0027] Figure 2 A schematic structural diagram of a trailer hitch according to an embodiment of the present invention from a second viewing angle;

[0028] Figure 3 An exploded view of a trailer hitch according to an embodiment of the present invention;

[0029] Figure 4 A three-dimensional diagram of the matching state of the rotating member and the sliding member according to an embodiment of the present invention;

[0030] Figure 5 It is a front view of the matching state of the rotating member and the sliding member according to the embodiment of the present invention;

[0031] Figure 6 for Figure 5 AA section view;

[0032] Figure 7 It is a structural schematic diagram of a sliding member according to an embodiment of the present invention;

[0033] Description of reference numerals:

[0034] 1. Mounting frame; 10. Trailer hook; 11. Trailer rod; 111. Connecting plate; 12. First connecting bracket; 13. Second connecting bracket; 14. Trailer hook bracket; 101. Hooking end; 141. Bracket body; 142. Loading plate; 1420. First guide end surface; 1421. Screw seat;

[0035] 2. Driving device; 21. Driving gear; 22. Driven gear; 23. Lead screw;

[0036] 3. Sliding member; 30. Groove; 31. First locking end surface; 32. Second locking end surface; 33. Threaded hole; 34. Second guide end surface;

[0037] 4. Rotating member; 40. Protruding portion; 41. First locking block; 42. Second locking block; 9. Locking nut. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0039] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0042] Embodiment 1

[0043] The present embodiment relates to a hitch device for a trailer, which can realize automatic extension and storage of the trailer hook and has a good locking effect in the extended position and the stored position, thereby improving the convenience of use.

[0044] In terms of overall composition, Figures 1 to 5 As shown, the trailer hitch device of this embodiment mainly includes a mounting frame 1 for connecting to a vehicle body, on which a driving device 2 and a rotating member 4 for fixing a trailer hook 10 and a sliding member 3 transmission-connected to the rotating member 4 are provided.

[0045] The sliding member 3 is driven by the driving device 2 to move between the first position and the second position, and the rotating member 4 rotates with the movement of the sliding member 3, and the trailer hook 10 rotates between the storage position and the extended position. In addition, a first locking structure and a second locking structure are provided between the sliding member 3 and the rotating member 4. When the sliding member 3 slides to the first position, the first locking structure is used to lock the trailer hook 10 in the storage position, and when the sliding member 3 slides to the second position, the second locking structure is used to lock the trailer hook 10 in the extended position.

[0046] In the above structure, the driving device 2 is provided to drive the sliding member 3 to move, and the rotating member 4 is made to rotate along with the movement of the sliding member 3. The rotation of the rotating member 4 causes the trailer hook 10 to rotate between the storage position and the extended position. At the same time, the setting of the first locking structure can lock the trailer hook 10 in the storage position, and the setting of the second locking structure can lock the trailer hook 10 in the extended position, so that the trailer hook 10 has a good locking effect and is also conducive to improving the convenience of use.

[0047] Specifically, continue to see Figures 1 to 5 As shown, the mounting frame 1 is used to be connected to the vehicle body so as to facilitate the arrangement and installation of the trailer hook 10 on the vehicle body. The mounting frame 1 is provided with a driving device 2, a sliding member 3 and a rotating member 4. The trailer hook 10 is fixedly mounted on the rotating member 4. The driving device 2 is connected to the sliding member 3 to drive the sliding member 3 to move between the first position and the second position. The sliding member 3 is transmission-connected to the rotating member 4. Under the movement of the sliding member 3, the rotating member 4 is driven to rotate, and the trailer hook 10 is rotated between the storage position and the extended position.

[0048] As an implementation mode, in this embodiment, if Figures 2 to 4 As shown, the mounting frame 1 is provided with a rotating hole, the rotating member 4 is rotatably arranged in the rotating hole, and one end of the rotating member 4 is formed with spline teeth, and one end of the trailer hook 10 connected to the rotating member 4 is also formed with spline teeth, and the trailer hook 10 and the rotating member 4 are fixedly installed together through spline matching. In addition, in this embodiment, a locking nut 9 is threaded on the rotating member 4 to position the axial direction of the trailer hook 10, so that the trailer hook 10 is better fixed on the rotating member 4.

[0049] The other end of the rotating member 4 is connected to the sliding member 3 in a transmission manner relative to the end provided with the trailer hook 10. In order to facilitate the movement of the sliding member 3 to drive the rotating member 4 to rotate, in this embodiment, the sliding member 3 is provided with a rotation driving portion, and the rotating member 4 is provided with a rotation matching portion, and the rotation driving portion and the rotation matching portion are connected in a transmission manner.

[0050] Specifically, as a preferred implementation, see Figures 1 to 5As shown, the rotation driving part includes a plurality of grooves 30 provided on the sliding member 3, and the plurality of grooves 30 are arranged at intervals along the sliding direction of the sliding member 3. The rotation matching part includes a plurality of protrusions 40 provided on the rotating member 4, and the plurality of protrusions 40 are arranged in a circle with the axis of the rotating member 4 as the center. As the sliding member 3 moves, the plurality of protrusions can be meshed and connected with the corresponding grooves 30.

[0051] See also Figure 4 and Figure 5 As shown, a plurality of cylindrical pins arranged at intervals are installed on the rotating member 4, and the axial directions of the plurality of cylindrical pins are perpendicular to the sliding direction of the sliding member 3, and the plurality of cylindrical pins are arranged in a circle with the axis of the rotating member 4 as the center. At the same time, a plurality of grooves 30 are provided on the sliding member 3 corresponding to the plurality of cylindrical pins. During the movement of the sliding member 3, the plurality of cylindrical pins sequentially enter the corresponding grooves 30 and rotate out of the corresponding grooves 30, so that the rotating member 4 rotates relative to the mounting frame 1 through the cooperation of the plurality of cylindrical pins and the plurality of grooves 30 under the movement of the sliding member 3, so that the trailer hook 10 rotates between the storage position and the extended position.

[0052] It is worth mentioning that, in this embodiment, the positions of the plurality of grooves 30 and the plurality of protrusions 40 are interchangeable. In addition, it is also worth mentioning that, in addition to the aforementioned plurality of grooves 30 and plurality of protrusions 40 matching structure, the rotation driving part and the rotation matching part may also adopt a matching structure of a gear and a rack, or a matching structure of a rack and a half gear (a portion of the gear circumference is provided with teeth), which is also feasible.

[0053] In this embodiment, a first locking structure and a second locking structure are provided between the sliding member 3 and the rotating member 4. When the sliding member 3 slides to the first position, the first locking structure locks the trailer hook 10 in the storage position. When the sliding member 3 slides to the second position, the second locking structure locks the trailer hook 10 in the extended position. Thus, the trailer hook 10 can be better locked in the storage position or the extended position, which is beneficial to improving the portability of the trailer hook 10.

[0054] In terms of specific structure, Figures 5 to 7 As shown, a first locking block 41 and a second locking block 42 are provided at one end of the rotating member 4 close to the mounting frame 1, and the first locking block 41 and the second locking block 42 are arranged at intervals in the circumferential direction of the end of the rotating member 4. The first locking structure includes a first locking block 41 provided on the rotating member 4, and a first locking end face 31 provided on the sliding member 3. When the sliding member 3 slides to the first position, the first locking block 41 abuts against the first locking end face 31. The abutting fit between the first locking block 41 and the first locking end face 31 is conducive to ensuring the stability of the trailer hook 10 in the storage position.

[0055] In this embodiment, the second locking structure includes a second locking block 42 provided on the rotating member 4, and a second locking end face 32 provided on the sliding member 3. When the sliding member 3 slides to the second position, the second locking block 42 abuts against the second locking end face 32. The abutting cooperation between the second locking block 42 and the second locking end face 32 is conducive to ensuring the stability of the trailer hook 10 in the extended position.

[0056] In a specific implementation, when the sliding member 3 slides to the first position, the outer end surface of the first locking block 41 is pressed against the first locking end surface 31. When the sliding member 3 slides to the second position, the outer end surface of the second locking block 42 is pressed against the second locking end surface 32. In order to ensure the locking effect, in this embodiment, Figure 7 As shown, the first locking end face 31 and the second locking end face 32 are inclined, so that the first locking block 41 and the second locking block 42 are better pressed against the first locking end face 31 and the second locking end face 32 respectively, which is beneficial to improve the locking effect and can also eliminate the gap between the outer end face of the first locking block 41 and the first locking end face 31, and between the outer end face of the second locking block 42 and the second locking end face 32.

[0057] It should be noted that, in addition to the above-mentioned structural forms, the first locking structure and the second locking structure in this embodiment may also adopt other locking structures, for example, through the cooperation of a locking block and a locking groove, which is also feasible.

[0058] It should also be noted that the drive device 2 of this embodiment can be a linear drive device such as a cylinder, an oil cylinder or a linear motor, and can also be a rotary drive device such as a motor. When a linear drive device is used, the slide 3 can be directly or indirectly connected to the power output end of the linear drive device. In this embodiment, the drive device 2 preferably uses a motor.

[0059] In order to facilitate the arrangement of the drive device 2, in this embodiment, a transmission assembly is also provided on the mounting frame 1, and the drive device 2 is transmission-connected to the sliding member 3 through the transmission assembly. Such an arrangement is not only conducive to the structural arrangement of the drive device 2, but also makes the structure more compact and the movement more flexible.

[0060] The transmission assembly of this embodiment, as a feasible implementation, includes a lead screw 23 rotatably arranged on the mounting frame 1, and the lead screw 23 is connected to the driving device 2. The sliding member 3 is screwed on the lead screw 23, and a guide structure is provided between the sliding member 3 and the mounting frame 1.

[0061] Specific, combined Figures 3 to 5As shown, the mounting frame 1 is provided with a screw seat 1421, and the screw 23 is rotatably arranged in the screw seat 1421. In addition, the sliding member 3 is provided with a threaded hole 33, and the screw 23 is screwed in the threaded hole 33. The threaded hole 33 cooperates with the external thread on the screw 23, so that the sliding member 3 is screwed and connected with the screw 23.

[0062] The above-mentioned guide structure specifically includes a first guide end face 1420 provided on the mounting frame 1, and a second guide end face 34 provided on the sliding member 3, and the first guide end face 1420 abuts against the second guide end face 34. Among them, the screw seat 1421 is specifically provided on the bearing plate 142 described below, and the upper end face of the screw seat 1421 constitutes the first guide end face 1420. Through the abutment and cooperation between the first guide end face 1420 and the second guide end face 34, the sliding member 3 can smoothly move in a straight line along the axial direction of the screw 23 during the rotation of the screw 23.

[0063] In this structure, the driving device 2 , that is, the motor, can be directly connected to the lead screw 23 . The lead screw 23 is directly driven by the driving device 2 to rotate, and drives the sliding member 3 to move along the axial direction of the lead screw 23 .

[0064] Also as a feasible implementation, in this embodiment, the transmission assembly further includes a driving gear 21 fixed to the power output end of the driving device 2, and a driven gear 22 fixed to the lead screw 23, and the driving gear 21 and the driven gear 22 are meshed and connected. At this time, the power of the driving device 2 is transmitted to the lead screw 23 through the driving gear 21 and the driven gear 22, so that the lead screw 23 rotates, thereby driving the sliding member 3 to move along the axial direction of the lead screw 23. The driving gear 21 and the driven gear 22 arranged between the driving device 2 and the lead screw 23 can help shorten the overall length of the mounting frame 1, and further make the structural arrangement more compact.

[0065] The mounting frame 1 of this embodiment is a preferred embodiment, which includes a tow bar 11 for connecting to a vehicle body, a connecting bracket provided on the tow bar 11, and a tow hook bracket 14 provided on the tow bar 11. The tow bar 11 can be a square tube, a round tube or a steel structure to ensure that the tow bar 11 has sufficient structural strength. In addition, connecting plates 111 are respectively provided at both ends of the tow bar 11, and the tow bar 11 is connected to the vehicle body through the connecting plates 111, and in a specific implementation, the connecting plates 111 can be connected to the vehicle body by screwing or welding.

[0066] In addition, the trailer hook bracket 14 specifically includes a bracket body 141 and a bearing plate 142 fixedly connected to one side of the bracket body 141, and the bearing plate 142 is provided with the above-mentioned screw seat 1421. Moreover, in this embodiment, the sliding member 3 and the rotating member 4 are both provided on the trailer hook bracket 14, that is, the trailer hook 10 is installed on the trailer hook bracket 14 through the rotating member 4, and the trailer hook bracket 14 is detachably connected to the connecting bracket. In this way, the disassembly and assembly of the trailer hook bracket 14 is conducive to the convenience of disassembly and assembly of the trailer hook 10 and the convenience of disassembly and assembly of the transmission assembly.

[0067] See also Figures 1 to 3 As shown, the above-mentioned connecting bracket specifically includes a first connecting bracket 12 and a second connecting bracket 13 which are arranged at intervals on the tow bar 11, and the two ends of the tow hook bracket 14 are respectively connected to the first connecting bracket 12 and the second connecting bracket 13. Among them, the first connecting bracket 12 and the second connecting bracket 13 are preferably fixed to the tow bar 11 by welding, and the first connecting bracket 12 and the second connecting bracket 13 are both provided with connecting holes connected to the tow hook bracket 14, and the two ends of the tow hook bracket 14 are respectively detachably connected to the first connecting bracket 12 and the second connecting bracket 13 through threaded connectors penetrating through the respective connecting holes.

[0068] By providing the trailer hook bracket 14 to be detachably connected to the first connecting bracket 12 and the second connecting bracket 13, the disassembly and assembly of the trailer hook bracket 14 can be facilitated, and the disassembly and assembly of the trailer hook 10 and the transmission assembly can also be facilitated, thereby improving the convenience of use.

[0069] The trailer hitch device of this embodiment, when in use, drives the driving gear 21 to rotate through the driving device 2, and the driving gear 21 drives the driven gear 22 and the lead screw 23 to rotate. Under the action of the guide structure, the sliding member 3 slides from the first position to the second position along the axial direction of the lead screw 23. At this time, under the sliding of the sliding member 3, the rotating member 4 rotates, and the trailer hook 10 rotates.

[0070] Moreover, when the sliding member 3 is in the first position, the first locking block 41 is locked on the first locking end surface 31. At this time, the trailer hook 10 is in the Figure 1 When the sliding member 3 is in the second position, the second locking block 42 is locked on the second locking end surface 32. At this time, the trailer hook 10 is in the Figure 1 The solid line in the middle shows the extended position, and in the extended position, the hook end 101 at the end of the trailer hook 10 can be assembled with the connecting groove on the towed member to achieve the hooking of the towed member and the vehicle body. It should be noted here that the towed member can be, for example, a luggage rack, a caravan, a cargo box, and other components that need to be towed.

[0071] The trailer hitch device of the present embodiment can not only realize the automatic extension and automatic storage of the trailer hook 10, but also enable the trailer hook 10 to have a good locking effect in the extended position and the stored position, which is conducive to improving the convenience of using the trailer hook 10.

[0072] Embodiment 2

[0073] This embodiment relates to a vehicle, the vehicle body of which is provided with the trailer hitch device of the first embodiment.

[0074] The vehicle of this embodiment, by adopting the trailer hitch device of the first embodiment, can make the trailer hook 10 be well stored at the bottom of the vehicle body, and can also make the trailer hook 10 automatically extend and well maintain in the extended position, and can also automatically store back to its original position, thereby having a good use effect.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A trailer hitch device, characterized in that: The invention comprises a mounting frame (1) for connecting to a vehicle body, the mounting frame (1) being provided with a driving device (2) and a rotating member (4) for fixing a trailer hook (10), and a sliding member (3) drivingly connected to the rotating member (4); The sliding member (3) is driven by the driving device (2) to move between a first position and a second position, and the rotating member (4) rotates along with the movement of the sliding member (3) to rotate the trailer hook (10) between a storage position and an extended position; A first locking structure and a second locking structure are provided between the sliding member (3) and the rotating member (4); when the sliding member (3) slides to the first position, the first locking structure is used to lock the trailer hook (10) at the storage position; when the sliding member (3) slides to the second position, the second locking structure is used to lock the trailer hook (10) at the extended position.

2. The trailer hitch according to claim 1, characterized in that: The sliding member (3) is provided with a rotation driving portion, and the rotating member (4) is provided with a rotation matching portion; The rotation driving portion and the rotation matching portion are transmission-connected.

3. The trailer hitch according to claim 2, characterized in that: The rotation driving portion comprises a plurality of grooves (30) provided on the sliding member (3), wherein the plurality of grooves (30) are arranged at intervals along the sliding direction of the sliding member (3); The rotating matching portion comprises a plurality of protrusions (40) provided on the rotating member (4), wherein the plurality of protrusions (40) are arranged in a circular shape with the axis of the rotating member (4) as the center; As the sliding member (3) moves, the plurality of protrusions can be engaged and connected with the corresponding grooves (30).

4. The trailer hitch according to claim 1, characterized in that: The first locking structure comprises a first locking block (41) provided on the rotating member (4), and a first locking end surface (31) provided on the sliding member (3), and when the sliding member (3) slides to the first position, the first locking block (41) is pressed against the first locking end surface (31); and / or, The second locking structure comprises a second locking block (42) provided on the rotating member (4), and a second locking end face (32) provided on the sliding member (3); when the sliding member (3) slides to the second position, the second locking block (42) is pressed against the second locking end face (32).

5. The trailer hitch according to claim 1, characterized in that: The mounting frame (1) is provided with a transmission assembly; The driving device (2) is transmission-connected to the sliding member (3) via the transmission assembly.

6. The trailer hitch according to claim 5, characterized in that: The transmission assembly comprises a lead screw (23) rotatably arranged on the mounting frame (1), wherein the lead screw (23) is connected to the driving device (2); The sliding member (3) is screwed onto the lead screw (23), and a guide structure is provided between the sliding member (3) and the mounting frame (1).

7. The trailer hitch according to claim 6, characterized in that: The guide structure is provided on a first guide end surface (1420) on the mounting frame (1), and a second guide end surface (34) on the sliding member (3), the first guide end surface (1420) abutting against the second guide end surface (34); and / or, The transmission assembly further comprises a driving gear (21) arranged at the power output end of the driving device (2), and a driven gear (22) arranged on the lead screw (23), wherein the driving gear (21) and the driven gear (22) are connected in a transmission manner.

8. The trailer hitch according to any one of claims 1 to 7, characterized in that: The mounting frame (1) comprises a towing rod (11) for connecting the vehicle body, a connecting bracket arranged on the towing rod (11), and a towing hook bracket (14) arranged on the towing rod (11); The sliding member (3) and the rotating member (4) are both arranged on the trailer hook bracket (14), and the trailer hook bracket (14) is detachably connected to the connecting bracket.

9. The trailer hitch according to claim 8, characterized in that: The connecting bracket comprises a first connecting bracket (12) and a second connecting bracket (13) which are arranged on the towing rod (11) at intervals; Two ends of the trailer hook bracket (14) are respectively connected to the first connecting bracket (12) and the second connecting bracket (13).

10. A vehicle, characterized in that: The vehicle body is provided with a trailer hitch device according to any one of claims 1 to 9.

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