Trailer device and vehicle

Abstract

The utility model provides a trailer device and a vehicle, and relates to the technical field of vehicles. The trailer device comprises a trailer hook and a mounting shell, the mounting shell is used for being connected with a vehicle body structure, a first opening is formed in one side of the mounting shell, and a clamping groove is formed in the side wall of the mounting shell; the tow hook comprises a tow hook body and an insertion part connected with the tow hook body, a buckle is formed at the end of the insertion part, and the insertion part is used for being inserted into the mounting shell through the first opening and enabling the buckle to be matched with the clamping groove in a clamped mode. The tow hook and the installation shell are in non-rigid connection through clamping fit of the buckle and the clamping groove, a gap can be formed between the installation shell and the insertion part in the installation shell, and a motor home behind can be towed by an automobile through the tow device. The bumping load or the braking impact load of the rear motor home can be eliminated through the gap, so that the body structure of the automobile and the towing capacity of the towing device are improved, and the bearing capacity is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a trailer device and a vehicle. Background Art

[0002] With the improvement of people's living standards and consumption capacity, the role of cars in people's daily lives has become more and more diverse, and it is no longer a simple commuting tool. In recent years, tourism has become more and more popular among people, which has increased the additional demand for cars towing RVs when traveling. With the increase in multi-child families and the diversification of usage scenarios, the functions of RVs have become more diverse, which has also caused RVs to become heavier and heavier. As a result, the number of cases of trailer device damage has increased year by year. At the same time, the structure of the trailer device itself determines the connection between the car and the trailer. Due to the unreasonable design of the trailer structure, the car is often broken and damaged during the process of towing the RV. Utility Model Content

[0003] The utility model aims to improve the towing capacity of a vehicle body structure and a traditional trailer device.

[0004] In order to solve the above-mentioned problem, the utility model provides a trailer device, including a trailer hook and a mounting shell, the mounting shell is used to connect with the vehicle body structure, one side of the mounting shell is provided with a first opening, and the side wall of the mounting shell is provided with a card slot; the trailer hook includes a trailer hook body and an insertion portion connected to the trailer hook body, a buckle is formed at the end of the insertion portion, the insertion portion is inserted into the mounting shell through the first opening, and the buckle is engaged with the card slot.

[0005] Compared with the prior art, the trailer device provided by the utility model has but is not limited to the following technical effects:

[0006] The trailer device of the utility model can connect a car with a car body (such as a motorhome) to be towed. For example, when a car needs to tow a motorhome, the mounting shell can be connected to the rear of the car body structure, and then the insertion part is inserted into the mounting shell through the first opening and the buckle is engaged with the card slot to complete the connection between the trailer hook and the mounting shell. At the same time, the connection between the trailer hook and the mounting shell is achieved by plugging and engaging, which can prevent the trailer hook from being separated from the mounting shell, that is, prevent the insertion part of the trailer hook from being separated from the mounting shell. In this way, after the insertion part is inserted into the mounting shell and the buckle is engaged with the card slot, the body structure of the car can be connected to the motorhome by connecting the trailer hook body to the traction structure of the motorhome. When the front car moves forward, the traction of the front car can be transmitted to the internal insertion part through the mounting shell, and finally the moving car can tow the motorhome. Moreover, since the trailer hook and the mounting shell are not rigidly connected by fasteners such as bolts, but a non-rigid connection is achieved through the snap-fit ​​cooperation between the buckle and the slot, that is, after the buckle of the insertion part is snapped into the slot of the mounting shell, there is a certain gap between the mounting shell and the insertion part inside it; in this way, when passing through a bumpy road section or the car in front brakes, part of the bump load or braking impact load of the rear RV can be eliminated through the gap between the insertion part and the mounting shell, and the entire load will not be transmitted to the body structure of the car in front through the trailer device, thereby improving the body structure of the car and the towing capacity of the trailer device, making the trailer device have a stronger carrying capacity.

[0007] Further, the lower side of the mounting shell is provided with the first opening, the rear side wall of the mounting shell is provided with the card slot, and the top end of the insertion portion is formed with the card buckle; the insertion portion is inserted upward into the mounting shell through the first opening, and the card buckle is engaged with the card slot; wherein the insertion portion is interference fit with the mounting shell, and the insertion portion can move relative to the mounting shell in at least one of the first direction, the second direction and the third direction.

[0008] Furthermore, a notch opening downward is provided at the bottom end of the left side wall and / or the right side wall of the mounting shell, and a boss is protruding from the insertion portion, and the boss is plugged into the notch. The insertion portion can move relative to the mounting shell at least along at least one of the second direction and the third direction, the second direction is the circumferential direction of the boss, and the third direction is the axial direction of the boss.

[0009] Furthermore, the trailer device also includes a connecting structure and a reinforcement member, the connecting structure is respectively connected to the mounting shell and the rear longitudinal beam of the vehicle body structure, and the reinforcement member is respectively connected to the connecting structure and the rear longitudinal beam.

[0010] Furthermore, the connecting structure includes a longitudinal arm and a first fastener; the longitudinal arm is used to be inserted into the rear longitudinal beam, and the reinforcement is used to be wrapped around the outer wall of the rear longitudinal beam; the first fastener is used to pass through the reinforcement, the rear longitudinal beam and the longitudinal arm in sequence to connect the reinforcement, the rear longitudinal beam and the longitudinal arm.

[0011] Furthermore, the connecting structure also includes a second fastener, which is used to pass through the rear longitudinal beam and the longitudinal arm in sequence to connect the rear longitudinal beam and the longitudinal arm; wherein the longitudinal arm is provided with a first connecting hole and a second connecting hole in sequence along the longitudinal direction, the first connecting hole is for the first fastener to pass through, the second connecting hole is for the second fastener to pass through, and the first connecting hole is located behind the second connecting hole.

[0012] Furthermore, the connection structure also includes a tube beam and an end plate, the transverse ends of the tube beam are respectively connected to the corresponding longitudinal arms through the end plates, and the mounting shell is connected to the tube beam.

[0013] Furthermore, the longitudinal arm includes a longitudinal arm body and an arm plate arranged at the rear end of the longitudinal arm body, the end plate includes a first plate body and a second plate body arranged at an obtuse angle, the arm plate is connected to the first plate body, and the second plate body is connected to the end of the tube beam.

[0014] Furthermore, the connection structure further comprises a vertical plate, the vertical plate is connected to the mounting shell, and a pipe hole is provided on the vertical plate, and the vertical plate is fixedly sleeved on the pipe beam through the pipe hole.

[0015] The utility model also provides a vehicle, comprising a vehicle body structure and the trailer device as described above, wherein a mounting shell of the trailer device is connected to the vehicle body structure.

[0016] Since the technical improvements and technical effects of the vehicle are the same as those of the trailer device, the vehicle will not be described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the exploded structure of the trailer device according to an embodiment of the utility model;

[0018] Figure 2 This is a schematic structural diagram of a trailer hook according to an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the installation shell of an embodiment of the utility model;

[0020] Figure 4 This is a schematic structural diagram of the trailer hook and the mounting shell after being assembled according to an embodiment of the utility model;

[0021] Figure 5 It is a structural schematic diagram of a trailer device according to an embodiment of the utility model;

[0022] Figure 6 It is a cross-sectional structural schematic diagram of a trailer device according to an embodiment of the utility model;

[0023] Figure 7 It is a structural schematic diagram of the trailer device and the vehicle body structure of the embodiment of the utility model after being installed at a viewing angle;

[0024] Figure 8 It is a structural schematic diagram of another viewing angle after the trailer device and the vehicle body structure of the embodiment of the utility model are installed;

[0025] Fig. 9 This is a schematic diagram of the structure of the rear longitudinal beam and the reinforcement member of an embodiment of the utility model;

[0026] Fig.10 It is a schematic diagram of the partial position structure of the trailer device and the rear bumper according to an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 1. trailer hook; 11. trailer hook body; 111. first hook arm; 1111. hook arm side flat wall; 112. second hook arm; 113. trailer hook ball head; 12. insertion part; 121. buckle; 122. boss; 2. mounting shell; 21. slot; 22. notch; 23. shell connecting hole; 31. vertical gap; 32. longitudinal gap; 41. rear longitudinal beam; 42. reinforcement; 51. longitudinal arm; 511. longitudinal arm body; 5111. first connecting hole; 5112. second connecting hole; 512. arm plate; 52. convex weld nut; 53. tube beam; 54. end plate; 541. first plate body; 542. second plate body; 55. vertical plate; 551. tube hole; 61. rear floor; 62. rear floor cross beam; 63. rear bumper; 64. anti-collision beam mounting plate. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. Although some embodiments of the utility model are shown in the accompanying drawings, it should be understood that the utility model can be implemented in various forms and should not be interpreted as being limited to the embodiments described here. On the contrary, these embodiments are provided to more thoroughly and completely understand the utility model. It should be understood that the drawings and embodiments of the utility model are only for exemplary purposes and are not used to limit the scope of protection of the utility model.

[0030] The Z axis in the accompanying drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the Y axis in the accompanying drawings represents the left and right positions, and the positive direction of the Y axis represents the left side, and the reverse direction of the Y axis represents the right side; the X axis in the accompanying drawings represents the longitudinal direction, that is, the front and back positions, and the positive direction of the X axis represents the front, and the reverse direction of the X axis represents the back. It should also be noted that the aforementioned Z axis, Y axis, and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The term "including" and its variations used in this article are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0032] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more". The "connection" mentioned in the present invention, unless otherwise specified, may refer to direct connection or indirect connection through one or more intermediate components; it may also refer to detachable connection, welding, or integrated connection.

[0033] See also Figure 1-6 A trailer device according to an embodiment of the utility model comprises a trailer hook 1 and a mounting shell 2, wherein the mounting shell 2 is used to be connected to a vehicle body structure, a first opening is provided on one side of the mounting shell 2, and a card slot 21 is provided on a side wall of the mounting shell 2; the trailer hook 1 comprises a trailer hook body 11 and an insertion portion 12 connected to the trailer hook body 11, a buckle 121 is formed at the end of the insertion portion 12, and the insertion portion 12 is used to insert the mounting shell 2 through the first opening, and make the buckle 121 engage with the card slot 21.

[0034] The trailer device in this embodiment can connect a car with a car body (such as a motorhome) to be towed. For example, when a car needs to tow a motorhome, the mounting shell 2 can be connected to the rear of the car body structure, and then the insertion portion 12 is inserted into the mounting shell 2 through the first opening and the buckle 121 is engaged with the card slot 21 to complete the connection between the trailer hook 1 and the mounting shell 2. At the same time, the connection between the trailer hook 1 and the mounting shell 2 is achieved by plugging and engaging, which can prevent the trailer hook 1 from being separated from the mounting shell 2, that is, prevent the insertion portion 12 of the trailer hook 1 from being separated from the mounting shell 2. In this way, after the insertion portion 12 is inserted into the mounting shell 2 and the buckle 121 is engaged with the card slot 21, the body structure of the car can be connected to the motorhome by connecting the trailer hook body 11 to the traction structure of the motorhome. When the front car moves forward, the traction of the front car can be transmitted to the internal insertion portion 12 through the mounting shell 2, and finally the moving car can tow the motorhome. Moreover, since the trailer hook 1 and the mounting shell 2 are not rigidly connected by fasteners such as bolts, but a non-rigid connection is achieved through the snap fit between the buckle 121 and the slot 21, that is, after the buckle 121 of the insertion part 12 is snapped into the slot 21 of the mounting shell 2, there is a certain gap between the mounting shell 2 and the insertion part 12 inside it; in this way, when passing through a bumpy road section or the car in front brakes, part of the bump load or braking impact load of the rear RV can be eliminated through the gap between the insertion part 12 and the mounting shell 2, and the entire load will not be transmitted to the body structure of the car in front through the trailer device, thereby improving the body structure of the car and the towing capacity of the trailer device, making the trailer device have a stronger carrying capacity.

[0035] In this embodiment, the mounting shell 2 is a shell structure with a first opening, but the wall thickness of the shell structure may be the same or different, as long as there is a cavity inside for the insertion portion 12 to be inserted.

[0036] It should be noted that, in this embodiment, the coupler body and the insertion portion 12 may be an integrally formed structure, and the buckle 121 is a part of the insertion portion 12, that is, the insertion portion 12 includes the buckle 121 and a non-buckle 121 part. In other words, the various components of the trailer hook 1 of this embodiment do not need to be additionally connected, which can ensure the effective force transmission of the trailer hook 1 and the durability of the trailer hook 1.

[0037] It should be noted that, in other embodiments, the trailer device of the utility model can also be installed on the rear of other vehicles other than automobiles. In other embodiments, the trailer hook 1 in the trailer device of the utility model can also be connected to the traction structure of other vehicles other than motorhomes.

[0038] See also Figure 1-6Optionally, the lower side of the mounting shell 2 is provided with the first opening, the rear side wall of the mounting shell 2 is provided with the card slot 21, and the top end of the insertion portion 12 is formed with the card buckle 121; the insertion portion 12 is used to insert the mounting shell 2 upward through the first opening, and make the card buckle 121 engage with the card slot 21; wherein the insertion portion 12 is interference fit with the mounting shell 2, and the insertion portion 12 can move relative to the mounting shell 2 in at least one of the first direction, the second direction and the third direction.

[0039] In this embodiment, the lower side of the mounting shell 2 is open, that is, the lower side of the mounting shell 2 has the first opening; the rear side wall of the mounting shell 2 is provided with a slot 21, which can connect the internal and external through-slot structures of the mounting shell 2. When the trailer hook 1 is assembled with the mounting shell 2, the insertion portion 12 of the trailer hook 1 is inserted upward into the mounting shell 2 through the first opening and the buckle 121 is engaged with the slot 21; since the slot 21 is a slot structure provided on the rear side wall of the mounting shell 2, the engagement of the buckle 121 with the slot 21 means that the buckle 121 extends into the slot 21 toward the rear and is engaged with the rear side wall of the mounting shell 2. When the slot 21 is a through-slot structure, the engagement and disengagement of the buckle 121 with the slot 21 can be facilitated; after the insertion portion 12 is inserted into the mounting shell 2 and the buckle 121 is engaged with the slot 21, the interference fit of the insertion portion 12 and the mounting shell 2 is completed.

[0040] In this embodiment, since the insertion portion 12 and the mounting shell 2 have an interference fit, it can be understood that the insertion portion 12 can move relative to the mounting shell 2 in the mounting shell 2, and has a margin space that can move relative to the mounting shell 2, and the margin space can include at least one of the vertical gap 31, the longitudinal gap 32 and the transverse gap; wherein the vertical gap 31 refers to the gap between the insertion portion 12 and the mounting shell 2 in the vertical direction, the longitudinal gap 32 refers to the gap between the insertion portion 12 and the mounting shell 2 in the front-to-back direction, and the transverse gap (not shown in the figure) refers to the gap between the insertion portion 12 and the mounting shell 2 in the left-right direction.

[0041] In one case of the present embodiment, the first direction may be a vertical direction, in which case the existence of the vertical gap 31 enables the insertion portion 12 to move in the vertical direction relative to the mounting shell 2; the second direction may be a longitudinal direction, in which case the existence of the longitudinal gap 32 enables the insertion portion 12 to move in the longitudinal direction relative to the mounting shell 2; the third direction may be a transverse direction, in which case the existence of the transverse gap enables the insertion portion 12 to move in the transverse direction relative to the mounting shell 2.

[0042] The vertical gap 31 may include the gap formed between the top of the buckle 121 and the inner top wall of the mounting shell 2, or the gap formed between the lower side of the buckle 121 and the lower side of the slot 21; the longitudinal gap 32 may include the gap between the front side wall of the insertion part 12 and the mounting shell 2, and the gap between the rear side wall of the insertion part 12 and the mounting shell 2; the transverse gap may include the gap between the left side wall of the insertion part 12 and the mounting shell 2, or the gap between the right side wall of the insertion part 12 and the mounting shell 2. The vertical gap 31 and the longitudinal gap 32 can unload and eliminate part of the transferred load, thereby improving the towing capacity of the trailer device. In addition, the existence of the longitudinal gap 32 is also conducive to the insertion of the insertion part 12 into the mounting shell 2 and the snap fit or separation operation of the buckle 121 and the slot 21.

[0043] Specifically, when the trailer hook body 11 is connected to the RV and the mounting shell 2 is connected to the front car, it can be understood that under the gravity of the trailer hook 1, the lower side of the buckle 121 of the insertion part 12 will abut against the lower side of the slot 21, and the buckle 121 and the slot 21 are not easy to separate. At this time, there may be no gap between the lower side of the buckle 121 and the lower side of the slot 21. The vertical gap 31 is mainly reflected in the gap formed between the upper side wall of the insertion part 12 and the mounting shell 2; when the trailer moves forward, the front car will contact the rear RV. Under the dragging action of the vehicle, the buckle 121 can extend into the card slot 21 to the rear to the greatest extent, and the rear side of the insertion part 12 will also abut against the rear side wall of the mounting shell 2, which can further prevent the trailer hook 1 from being separated from the mounting shell 2, and achieve a stable connection effect between the trailer hook 1 and the mounting shell 2. At this time, there may be no gap between the rear side wall of the insertion part 12 and the mounting shell 2, and the longitudinal gap 32 between the insertion part 12 and the mounting shell 2 is mainly formed between the front side wall of the insertion part 12 and the mounting shell 2. When passing through a bumpy road section or the front vehicle brakes, part of the bump load or braking impact load of the rear RV can be eliminated through at least one of the longitudinal gap 32, the vertical gap 31 and the transverse gap, and the entire load will not be transmitted to the body structure of the front vehicle, thereby improving the body structure of the car and the towing capacity of the trailer device, and the carrying capacity is stronger.

[0044] Among them, "when passing through a bumpy road section or the front vehicle brakes, part of the bump load or braking impact load of the rear RV can be eliminated by at least one of the longitudinal gap 32, the vertical gap 31 and the transverse gap", specifically refers to: see Figure 6When passing through a bumpy road section, the insertion portion 12 of the trailer hook 1 can move up and down relative to the mounting shell 2 to eliminate the vertical gap 31 between the insertion portion 12 and the mounting shell 2 (the first direction is the vertical direction at this time); when the front vehicle brakes, the insertion portion 12 of the trailer hook 1 can move forward and backward relative to the mounting shell 2 to eliminate the longitudinal gap 32 between the insertion portion 12 and the mounting shell 2 (the second direction can be the longitudinal direction at this time), and then by eliminating the gap, part of the bump load or part of the braking impact load of the rear RV can be unloaded, and finally the load transmitted to the body structure of the front vehicle by the rear RV is reduced, so that the body structure of the front vehicle and the trailer device have stronger towing capacity and stronger carrying capacity.

[0045] See also Figure 2-4 Optionally, a notch 22 with an opening facing downward is provided at the bottom end of the left side wall and / or the right side wall of the mounting shell 2, and the insertion portion 12 is protrudingly provided with a boss 122, and the boss 122 is plugged into the notch 22, the second direction is the circumferential direction of the boss 122, and the third direction is the axial direction of the boss 122 (that is, the lateral direction represented by the Y axis in the figure).

[0046] At this time, in the second case of this embodiment, due to the matching relationship between the boss 122 and the notch 22, different from the first case mentioned above, the insertion portion 12 can only move relative to the mounting shell 2 along at least one of the second direction and the third direction; the second direction is the circumferential direction of the boss 122.

[0047] In this embodiment, during the process of inserting the inserting portion 12 upwardly into the mounting shell 2 and making the buckle 121 engage with the slot 21, the boss 122 on the inserting portion 12 is also inserted into the notch 22. Through the matching of the boss 122 and the notch 22, when the trailer hook 1 is subjected to the traction force in the X direction of the car, the boss 122 will also drive the mounting shell 2 and the rear caravan to move, which can avoid excessive local force between the buckle 121 and the slot 21, thereby ensuring the durability of the mounting shell 2, the trailer hook 1 and even the trailer device.

[0048] Furthermore, since the boss 122 fits into the notch 22, at this time, "when passing through a bumpy road section or the front vehicle brakes, part of the bump load or braking impact load of the rear RV can be eliminated by at least one of the longitudinal gap 32, the vertical gap 31 and the transverse gap", specifically referring to: See Figure 4-6 Due to the existence of the longitudinal gap 32 and the vertical gap 31, when passing through a bumpy road section or the front vehicle brakes, the insertion portion 12 will rotate relative to the mounting shell 2 around the axis of the boss 122 (the second direction is the circumferential direction of the boss 122 at this time) to eliminate the longitudinal gap 32 and / or the vertical gap 31, which has a better effect on eliminating the load.

[0049] Optionally, notches 22 are respectively provided at the bottom ends of the left and right walls of the mounting shell 2, and two left and right bosses 122 are provided on the insertion portion 12. The two bosses 122 respectively cooperate with the corresponding notches 22, so that the force transmission effect between the trailer hook 1 and the mounting shell 2 can be better and the durability can be improved.

[0050] Alternatively, see Figure 2 The trailer hook body 11 includes a first hook arm 111, a second hook arm 112 and a trailer hook ball head 113 at the end of the second hook arm 112, wherein the first hook arm 111 is perpendicular to the insertion portion 12 and extends in the longitudinal direction, the second hook arm 112 is approximately perpendicular to the first hook arm 111 and extends upward, the trailer hook ball head 113 is located at the top end of the second hook arm 112, and the trailer hook ball head 113, the second hook arm 112, the first hook arm 111 and the insertion portion 12 are an integrally formed structure. Among them, the trailer hook ball head 113 at the top of the second hook arm 112 is used for ball-jointed connection with the traction structure of the rear RV; the first hook arm 111 serves as a connecting arm between the second hook arm 112 and the insertion part 12, and the longitudinal ends of the first hook arm 111 are respectively smoothly connected with the second hook arm 112 and the insertion part 12, and part of the material on both sides of the middle non-critical force-bearing area of ​​the first hook arm 111 can be cut off to form a hook arm side flat wall 1111, which can ensure the structural strength while achieving the weight reduction effect.

[0051] It should be noted that in some prior arts, the trailer device is specifically installed on the rear anti-collision beam of the front vehicle body structure. The inventor of the present utility model found that for this form of installing the trailer device on the rear anti-collision beam, since the trailer device and the rear anti-collision beam share the mounting point on the vehicle body, there is a large torque in the force transmission process between the rear anti-collision beam and the vehicle body, and the rear anti-collision beam is usually a sheet metal part with insufficient strength. The strength requirements of the mounting points on the rear anti-collision beam and the shared mounting points on the vehicle body are relatively high, and both require additional reinforcement of the mounting point structure, resulting in additional design costs and increased weight. If no special reinforcement is made, the carrying capacity of the rear anti-collision beam and the vehicle body will be limited.

[0052] Based on the above problems, the trailer device of the embodiment of the utility model further includes a connecting structure and a reinforcement 42. The connecting structure is respectively connected to the mounting shell 2 and the rear longitudinal beam 41 of the vehicle body structure, and the reinforcement 42 is respectively connected to the connecting structure and the rear longitudinal beam 41.

[0053] In this embodiment, the mounting shell 2 is indirectly connected to the body structure of the front vehicle through a connecting structure, and is connected to the rear longitudinal beam 41 in the body structure. In this way, the load of the rear RV can be transmitted to the rear longitudinal beam 41 of the front vehicle with a higher load-bearing capacity through the trailer hook 1, the mounting shell 2 and the connecting structure in sequence (compared with the traditional rear anti-collision beam, the rear longitudinal beam 41 has a higher load-bearing capacity).

[0054] In this embodiment, the body structure of the front vehicle includes a reinforcement 42, which can be fixed on the rear longitudinal beam 41, and the connecting structure of the trailer device can be connected to the rear longitudinal beam 41 through the reinforcement 42, that is, the reinforcement 42 is respectively connected to the connecting structure and the rear longitudinal beam 41, so that the structural strength of the connection between the trailer device and the rear longitudinal beam 41 can be further improved.

[0055] See also Figure 7-8 Optionally, the body structure of the front vehicle includes not only the rear longitudinal beam 41, but also a rear floor 61 and a rear floor cross beam 62. The lateral ends of the rear floor cross beam 62 are respectively connected to the rear longitudinal beams 41 on the left and right sides to form an "I"-shaped structure. The lateral ends of the rear floor 61 are also respectively connected to the rear longitudinal beams 41 on the left and right sides to form an "I"-shaped structure. The body structure has a high rigidity. In this way, the load of the rear RV can eventually be transmitted to the "I"-shaped structure. After the body structure is subjected to the load of the rear RV, the flexural deformation resistance is stronger and the force transmission effect is better. The various components in the body structure are mainly connected by connection schemes such as welding points and structural adhesives. The connection method is simple and the process is mature.

[0056] Alternatively, see Figure 7-8 The rear end of the rear longitudinal beam 41 is also equipped with an anti-collision beam mounting plate 64. When the vehicle does not need the trailer device, the trailer device can be unloaded, and then the original rear anti-collision beam is connected to the anti-collision beam mounting plate 64 to achieve the connection between the rear anti-collision beam and the rear longitudinal beam 41. The anti-collision beam mounting plate 64 is provided with a through hole for the longitudinal arm 51 to pass through, and the longitudinal arm 51 is inserted into the rear longitudinal beam 41 through the through hole.

[0057] It is understandable that when the vehicle needs to be equipped with the trailer device, the rear anti-collision beam can be removed from the rear longitudinal beam 41 first, and then the trailer device can be connected to the rear longitudinal beam 41.

[0058] See also Figure 7-10 Optionally, the connecting structure includes a longitudinal arm 51 and a first fastener (not shown in the figure); the longitudinal arm 51 is used to be inserted into the rear longitudinal beam 41, and the reinforcement 42 is used to be wrapped around the outer wall of the rear longitudinal beam 41; the first fastener is used to pass through the reinforcement 42, the rear longitudinal beam 41 and the longitudinal arm 51 in sequence to connect the reinforcement 42, the rear longitudinal beam 41 and the longitudinal arm 51.

[0059] In this embodiment, Fig. 9As shown, the reinforcement 42 is wrapped around the tail of the rear longitudinal beam 41. After the longitudinal arm 51 of the connection structure is inserted into the rear longitudinal beam 41, the first fastener can be sequentially inserted through the reinforcement 42, the rear longitudinal beam 41 and the longitudinal arm 51 to connect and fix the reinforcement 42, the rear longitudinal beam 41 and the longitudinal arm 51. The reinforcement 42 strengthens the connection strength between the longitudinal arm 51 and the rear longitudinal beam 41.

[0060] It can be understood that the longitudinal arm 51, the reinforcement 42 and the rear longitudinal beam 41 are respectively provided with connection holes, and the first fastener can be a bolt, and the fixing is achieved by connecting the bolt with the connection hole.

[0061] In other embodiments, the reinforcement 42 may also be a reinforcement rib or a connecting angle plate. For example, the reinforcement 42 is a reinforcement rib, and the reinforcement rib is respectively connected to the rear longitudinal beam 41 and the connecting structure. The reinforcement rib may be a convex rib structure on the rear longitudinal beam 41.

[0062] See also Figure 5-6 and Figure 8 The connection structure also includes a second fastener (not shown in the figure), which is used to pass through the rear longitudinal beam 41 and the longitudinal arm 51 in sequence to connect the rear longitudinal beam 41 and the longitudinal arm 51; wherein the longitudinal arm 51 is sequentially provided with a first connecting hole 5111 and a second connecting hole 5112 along the longitudinal direction, the first connecting hole 5111 is for the first fastener to pass through, and the second connecting hole 5112 is for the second fastener to pass through, and the first connecting hole 5111 is located behind the second connecting hole 5112.

[0063] In this embodiment, the longitudinal arm 51 is connected to the rear longitudinal beam 41 through two fasteners, one in front and one in the back, wherein the reinforcement 42 is arranged at the position of the rear longitudinal beam 41 corresponding to the first fastener, that is, the reinforcement 42 is used to strengthen the strength of the rear longitudinal beam 41 and the longitudinal arm 51 at the first connection hole 5111. This is because the load of the trailer device is first transmitted to the vehicle body structure through the first connection hole 5111 at the rear, so the transmission load at the first connection hole 5111 is often relatively large. The reinforcement 42 is designed here to further strengthen the rigidity and strength of the local installation point at the first connection hole 5111, which can avoid the first connection hole 5111 being damaged and causing connection failure; in addition, the reinforcement 42 can be welded to the longitudinal arm 51, and multiple welding points (for example, four welding points) can be evenly distributed around the reinforcement 42 at the first connection hole 5111, which can improve the welding point and sheet metal fatigue life of the rear longitudinal beam 41 around the first connection hole 5111, and avoid the welding point and sheet metal cracking at this place due to the long-term use of the trailer device.

[0064] The reinforcement 42 may be a U-shaped sheet metal part, which is bilaterally symmetrical. The U-shaped sheet metal part includes an integrally formed lower sheet metal part, an inner sheet metal part, and an outer sheet metal part. The lower sheet metal part is wrapped around the lower side wall of the rear end of the rear longitudinal beam 41, the inner sheet metal part is wrapped around the inner side wall of the rear end of the rear longitudinal beam 41 (the side wall where the two rear longitudinal beams 41 are close to each other), and the outer sheet metal part is wrapped around the outer side wall of the rear end of the rear longitudinal beam 41 (the side wall where the two rear longitudinal beams 41 are far away from each other). The hole corresponding to the first connection hole 5111 on the reinforcement 42 is located on the outer sheet metal part, and the hole corresponding to the first connection hole 5111 on the rear longitudinal beam 41 is also located at the outer side wall of the rear longitudinal beam 41. In this way, the first fastener can realize the connection of each hole from the outside, which is convenient for operation. Similarly, the hole corresponding to the second connection hole 5112 on the rear longitudinal beam 41 is also located at the outer side wall of the rear longitudinal beam 41.

[0065] Among them, Figure 5-6 As shown, the longitudinal arm 51 is provided with projection welding nuts 52 at the first connection hole 5111 and the second connection hole 5112 respectively. When the fastener is a bolt, the projection welding nut 52 can be threadedly connected with the bolt to be fixed.

[0066] See also Figure 1 , Figure 4-7 Optionally, the connection structure further includes a tube beam 53 and an end plate 54 , the transverse ends of the tube beam 53 are respectively connected to the corresponding longitudinal arms 51 through the end plates 54 , and the mounting shell 2 is connected to the tube beam 53 .

[0067] In this embodiment, the mounting shell 2 is connected to the tube beam 53 and can be installed in the middle of the tube beam 53. The transverse ends of the tube beam 53 are connected to the tail end of the longitudinal arm 51 through the end plates 54. The tube beam 53 is a hollow tubular structure, which reduces weight while ensuring a certain structural strength.

[0068] See also Figure 1 , Figure 5-6 and Fig.10 Optionally, the longitudinal arm 51 includes a longitudinal arm body 511 and an arm plate 512 arranged at the rear end of the longitudinal arm body 511, and the end plate 54 includes a first plate body 541 and a second plate body 542 arranged at an obtuse angle, the arm plate 512 is connected to the first plate body 541, and the second plate body 542 is connected to the end of the tube beam 53.

[0069] In this embodiment, the longitudinal arm body 511 is inserted into the rear longitudinal beam 41, and the arm plate 512 at the rear end of the longitudinal arm 51 is used to connect with the first plate body 541 of the end plate 54, and the second plate body 542 of the end plate 54 is used to connect with the tube beam 53. The arm plate 512 and the first plate body 541 can be bolted, and the second plate body 542 and the tube beam 53 can be welded and fixed. The connection form is simple, the cost is low, and the continuity of force transmission is guaranteed. Fig.10As shown, in order to prevent the end plate 54 from interfering with the rear bumper 63 of the vehicle body structure in the longitudinal direction, the second plate body 542 is designed to be arranged at an obtuse angle with the first plate body 541 .

[0070] It is understandable that in order to ensure that the rigidity of the tube beam 53 is sufficient, the diameter of the tube beam 53 is required to be relatively large. Since a circle at the end of the tube beam 53 needs to be welded to the second plate 542, the length requirement of the second plate 542 will also be relatively large. If the second plate 542 with a larger length is perpendicular to the first plate 541 (that is, the second plate extends along the X-axis direction), then the second plate 542 with a larger length may interfere with the rear bumper 63 on the rear side. Therefore, in this embodiment, the second plate 542 with a larger length is designed to be set at an obtuse angle to the first plate 541, that is, the second plate 542 is tilted relative to the first plate 541, so that the size of the second plate along the X-axis direction becomes smaller, which can avoid this problem; it is understandable that the end face of the tube beam 53 can also be set as an inclined surface to cooperate with the second plate 542 for connection.

[0071] In other embodiments, the end plate 54 may also be of other structural forms, and the end plate 54 and the tubular beam 53 and the longitudinal arm 51 are not limited to the above-mentioned connection method. For example, the end plate 54 may also be a reinforcing rib or a connecting angle plate, and the end plate 54 and the longitudinal arm 51 and the tubular beam 53 may also be connected by connecting parts.

[0072] Optionally, the length of the longitudinal arm body 511 is 165mm-175mm, for example, 170mm, and the spacing between the first connecting hole 5111 and the second connecting hole 5112 is 105mm-115mm, for example, 110mm. Under the premise of ensuring the rigidity and fatigue performance of the connection point, the length of the longitudinal arm 51 is reduced as much as possible to achieve the purpose of weight reduction and cost reduction, and the space occupied by the longitudinal arm body 511 in the interior of the rear longitudinal beam 41 is also reduced, so that other devices can be arranged inside the rear longitudinal beam 41.

[0073] See also Figure 1 , Figure 5-7 Optionally, the connection structure further includes a vertical plate 55 , the vertical plate 55 is connected to the mounting shell 2 , and a pipe hole 551 is provided on the vertical plate 55 , and the vertical plate 55 is fixedly sleeved on the pipe beam 53 through the pipe hole 551 .

[0074] In this embodiment, the installation shell 2 is specifically connected and fixed to the tube beam 53 through a vertical plate 55. The vertical plate 55 can be fixed to the installation shell 2 by bolts. The installation shell 2 is provided with a shell connection hole 23, which is used to be connected with the bolts. The top of the vertical plate 55 has a tube hole 551. After the vertical plate 55 is sleeved on the tube beam 53 through the tube hole 551, the vertical plate 55 and the tube beam 53 can be fixed by welding. Among them, each shell connection hole 23 runs through the entire shell, that is, through the two opposite side walls of the shell, and then the bolt can run through the entire shell. In addition, the installation shell 2 can be provided with two shell connection holes 23, one above and one below, to ensure the stability of the connection between the vertical plate 55 and the installation shell 2. Two vertical plates 55 can be provided, and the two vertical plates 55 are respectively located on the left and right sides of the installation shell 2. The two vertical plates 55 are respectively connected to the installation shell 2 by bolts, and the two vertical plates 55 are respectively welded to the tube beam 53. The vertical plate 55 can be welded and fixed to the tube beam 53 by girth welding at the tube hole 551 to ensure a stronger force transmission capacity.

[0075] In summary, the trailer device of the utility model has the characteristics of simple structure, convenient connection, strong carrying capacity, convenient installation and disassembly, light weight, low cost, maintainability, strong interchangeability, and no interference with the rear bumper.

[0076] Another embodiment of the utility model further provides a vehicle, comprising a vehicle body structure and the trailer device as described above, wherein a mounting shell of the trailer device is connected to the vehicle body structure.

[0077] Since the technical improvements and technical effects of the vehicle are the same as those of the trailer device, the vehicle will not be described in detail.

[0078] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0079] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A trailer device, characterized in that: The invention comprises a trailer hook (1) and a mounting shell (2), wherein the mounting shell (2) is used to be connected to a vehicle body structure, a first opening is arranged on one side of the mounting shell (2), and a clamping groove (21) is arranged on the side wall of the mounting shell (2); the trailer hook (1) comprises a trailer hook body (11) and an insertion portion (12) connected to the trailer hook body (11), a buckle (121) is formed at the end of the insertion portion (12), the insertion portion (12) is inserted into the mounting shell (2) through the first opening, and the buckle (121) is clamped and matched with the clamping groove (21).

2. The trailer device according to claim 1, characterized in that: The lower side of the mounting shell (2) is provided with the first opening, the rear side wall of the mounting shell (2) is provided with the card slot (21), and the top end of the insertion portion (12) is formed with the card buckle (121); the insertion portion (12) is inserted upward into the mounting shell (2) through the first opening, and the card buckle (121) is engaged with the card slot (21); wherein the insertion portion (12) is interference-fitted with the mounting shell (2), and the insertion portion (12) can move relative to the mounting shell (2) in at least one of a first direction, a second direction and a third direction.

3. The trailer device according to claim 2, characterized in that: A notch (22) opening downward is provided at the bottom end of the left side wall and / or the right side wall of the mounting shell (2); a boss (122) is protruding from the insertion portion (12); the boss (122) is plugged into and fits with the notch (22); the insertion portion (12) can move relative to the mounting shell (2) in at least one of the second direction and the third direction; the second direction is the circumferential direction of the boss (122); and the third direction is the axial direction of the boss (122).

4. The trailer device according to any one of claims 1 to 3, characterized in that: It also includes a connection structure and a reinforcement member (42), wherein the connection structure is respectively connected to the mounting shell (2) and the rear longitudinal beam (41) of the vehicle body structure, and the reinforcement member (42) is respectively connected to the connection structure and the rear longitudinal beam (41).

5. The trailer device according to claim 4, characterized in that: The connection structure comprises a longitudinal arm (51) and a first fastener; the longitudinal arm (51) is used to be inserted into the rear longitudinal beam (41), and the reinforcing member (42) is used to be wrapped around the outer wall of the rear longitudinal beam (41); the first fastener is used to be sequentially penetrated through the reinforcing member (42), the rear longitudinal beam (41) and the longitudinal arm (51) to connect the reinforcing member (42), the rear longitudinal beam (41) and the longitudinal arm (51).

6. The trailer device according to claim 5, characterized in that: The connection structure also includes a second fastener, which is used to be sequentially passed through the rear longitudinal beam (41) and the longitudinal arm (51) to connect the rear longitudinal beam (41) and the longitudinal arm (51); wherein the longitudinal arm (51) is sequentially provided with a first connection hole (5111) and a second connection hole (5112) along the longitudinal direction, the first connection hole (5111) is for the first fastener to pass through, and the second connection hole (5112) is for the second fastener to pass through, and the first connection hole (5111) is located behind the second connection hole (5112).

7. The trailer device according to claim 5, characterized in that: The connection structure also includes a tube beam (53) and an end plate (54); the transverse ends of the tube beam (53) are respectively connected to the corresponding longitudinal arms (51) through the end plates (54); and the mounting shell (2) is connected to the tube beam (53).

8. The trailer device according to claim 7, characterized in that: The longitudinal arm (51) comprises a longitudinal arm body (511) and an arm plate (512) arranged at the rear end of the longitudinal arm body (511); the end plate (54) comprises a first plate body (541) and a second plate body (542) arranged at an obtuse angle; the arm plate (512) is connected to the first plate body (541); and the second plate body (542) is connected to the end of the tube beam (53).

9. The trailer device according to claim 7, characterized in that: The connection structure also includes a vertical plate (55), the vertical plate (55) is connected to the mounting shell (2), and a pipe hole (551) is provided on the vertical plate (55), and the vertical plate (55) is fixedly sleeved on the pipe beam (53) through the pipe hole (551).

10. A vehicle, characterized in that: The invention comprises a vehicle body structure and a trailer device as claimed in any one of claims 1 to 9, wherein a mounting shell (2) of the trailer device is connected to the vehicle body structure.

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