Trailer assembly with convertible and adjustable three ball seats

Abstract

The utility model provides a convertible adjusting three-ball-seat trailer assembly. The convertible and adjustable three-ball-seat trailer assembly comprises a fixing frame, a first ball seat and a second ball seat, the fixing shaft is mounted in the fixing frame through a connecting structure, a second mounting groove is formed in the position, close to the top end, of the outer surface of the fixing shaft, a first butt joint groove is formed in the inner surface of the fixing frame, and a first ball group is arranged between the first butt joint groove and the second mounting groove; a butt joint shaft is fixedly connected to the outer surface of the fixing frame, and a plurality of fixing holes are formed in the outer surface of the fixing shaft; and the mounting frame is mounted on the outer surface of the fixing shaft through a connecting structure, a butt joint frame is fixedly connected to the front face of the mounting frame, and a second butt joint groove is formed in the inner surface of the butt joint frame. According to the trailer assembly capable of converting and adjusting the three ball seats, rapid storage can be achieved through the design, and exposure of the ball heads is avoided.

Description

Technical Field

[0001] This utility model relates to the field of three-ball seat trailer technology, and in particular to a convertible and adjustable three-ball seat trailer assembly. Background Technology

[0002] A trailer hitch, also known as a tow hook, ball-type rear tow hook, trailer bar, or tow bar, is broadly defined as consisting of three parts: a fixed bracket, a ball, and a power harness. In a narrower sense, a trailer hitch refers to the fixed bracket that is fixed to the rear bumper beam of the vehicle and the ball of the high-strength trailer hitch.

[0003] Because trailers come in various forms and load capacities, trailer hitch devices are also usually available in multiple models, generally distinguished by the size of the ball joint. When towing a trailer with a larger mass, a larger ball joint must be used.

[0004] Typical three-ball trailer hitches connect the shaft and the main body via shafts with different ball heads. This results in a relatively simple force distribution and poor stability, making it inconvenient to operate when different ball heads need to be switched.

[0005] Therefore, it is necessary to provide a convertible adjustable three-ball seat trailer assembly to solve the above-mentioned technical problems. Summary of the Invention

[0006] This utility model provides a convertible and adjustable three-ball trailer hitch assembly, which solves the problems of poor stability caused by the relatively simple force-bearing method of traditional three-ball trailer hooks and the inconvenience of operation when changing different models of ball heads.

[0007] To solve the above-mentioned technical problems, the convertible adjustable three-ball seat trailer assembly provided by this utility model includes: a fixing frame;

[0008] A fixed shaft is installed inside a fixed frame via a connecting structure. A second mounting groove is provided on the outer surface of the fixed shaft near the top. A first mating groove is provided on the inner surface of the fixed frame. A first ball bearing assembly is provided between the first mating groove and the second mounting groove. A mating shaft is fixedly connected to the outer surface of the fixed frame. A plurality of fixing holes are provided on the outer surface of the fixed shaft.

[0009] The mounting frame is mounted on the outer surface of the fixed shaft via a connecting structure. A docking frame is fixedly connected to the front of the mounting frame. A second docking groove is formed on the inner surface of the docking frame. A docking bolt is installed inside the docking frame via a connecting structure. A first mounting groove is formed on the outer surface of the docking bolt. A second ball set is installed between the first mounting groove and the second docking groove. A fixing head is fixedly connected to one end of the front of the docking bolt. Three ball heads are mounted on the outer surface of the fixing head via three fixing bases. A base plate is installed at the bottom of the docking frame.

[0010] The connecting structure is similar to a pin structure, passing through the fixing frame and the fixing shaft. The connecting structure passes through the fixing hole, and the front of the docking frame has an opening for the docking bolt to be inserted. Different ball head models are available. The chassis is installed at the bottom of the docking frame by positioning screws. The fixing frame and the fixing shaft are also reinforced by positioning screws. The outer surface of the fixing shaft at the top can be tapered. When the ball head needs to be stored, simply remove the connecting structure on the mounting frame and rotate the mounting frame to store the ball head under the docking shaft, thus preventing the ball head from being exposed.

[0011] Preferably, an adjustment frame is fixedly connected to the front of the mounting frame, and a rotating block is rotatably connected to the inside of the adjustment frame near the front via a rotating assembly. The rotating assembly includes a rotating shaft and a bearing. The rotating shaft is used to install the bearing inside the adjustment frame. A docking shaft is fixedly connected to the back of the fixed frame. A docking block is fixedly connected to one side of the rotating block. Ball heads are mounted on the other three sides of the rotating block via fixed bases. Two docking holes are opened on the outer surfaces of the ball heads and the docking blocks. Two pin structures are provided on the outer surface of the adjustment frame.

[0012] The connection between the adjustment frame and the mounting frame has been reinforced. The rotating block is a cube. The adjustment frame has holes corresponding to the docking holes to facilitate the insertion of the pin structure. The bearings have also been reinforced.

[0013] Preferably, the pin structure includes a pin, a through hole, and a retaining bolt, wherein the through hole penetrates the outer surface of the pin near one end for the retaining bolt to pass through.

[0014] The limit pin consists of a foldable patch. After being inserted into the through hole, it can be folded to fix the pin in place. The pin passes through the mating hole or the fixing hole.

[0015] Preferably, a sealing plate is installed on the top of the fixing frame, and a mating buckle is installed at the bottom of the fixing shaft. A connecting assembly is installed inside the mating buckle. The connecting assembly includes a limiting bolt and a plug. The limiting bolt is used to fix the plug after it passes through the mating buckle.

[0016] The limiting bolt is similar to a pin structure. It can lock the plug in place by passing through it. A chain can be hung on the connecting component to limit the pin structure and prevent it from falling off after disassembly.

[0017] Preferably, a protective cover is mounted on the top of the mounting frame via a mounting assembly, the mounting assembly comprising a mounting structure, fixing bolts, and a connecting structure, the fixing bolts being used to secure the connecting structure after it is inserted into the mounting structure.

[0018] The protective cover covers the top of the adjustment frame, and the mounting structure has an opening at the top.

[0019] Preferably, the outer surface of the fixed shaft has two limiting grooves, and the inner surface of the mounting frame is fixedly connected to two limiting strips;

[0020] The limit bar is inserted into the limit groove.

[0021] Compared with related technologies, the convertible adjustable three-ball seat trailer assembly provided by this utility model has the following advantages:

[0022] This utility model provides a convertible and adjustable three-ball-end trailer assembly. To improve the stability and facilitate conversion of the three-ball-end trailer assembly, a through-type connecting structure is adopted to install the fixing frame on the outer surface of the fixing shaft. The outer surface of the fixing shaft and the inner surface of the fixing frame are respectively provided with a second mounting groove and a first mating groove. At the same time, the first ball bearing assembly is installed in the second mounting groove and the first mating groove. Combined with the connecting structure, the stability of the fixing shaft connection can be increased. The mounting frame is also installed on the outer surface of the fixing shaft using a connecting structure, which can achieve quick storage and avoid the ball head being exposed. A mating frame with a second mating groove is installed on the front of the mounting frame, and the mating bolt with the first mounting groove is inserted into the interior of the mating frame. The second ball bearing assembly fills the second mating groove and the first mounting groove. Combined with the connecting structure, the stability of the ball head can be increased. At the same time, this design improves the connection stability of the three-ball-end trailer assembly and allows for quick conversion between different ball head models. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of the first embodiment of the convertible and adjustable three-ball seat trailer assembly provided by this utility model;

[0024] Figure 2 This utility model provides a structural schematic diagram of the chassis;

[0025] Figure 3 This utility model provides a structural diagram showing the docking frame after it has been stored.

[0026] Figure 4 A schematic diagram of the structure of a second embodiment of the convertible and adjustable three-ball seat trailer assembly provided by this utility model;

[0027] Figure 5 A structural schematic diagram of the mounting frame is provided for this utility model;

[0028] Figure 6 A schematic diagram of the structure of the ball head provided by this utility model;

[0029] Figure 7 Provided for this utility model Figure 6 An enlarged view of point A shown;

[0030] Figure 8 Provided for this utility model Figure 6 A magnified view of point B shown.

[0031] The diagram labels are as follows: 1. Fixing bracket, 2. Sealing disc, 3. Connecting shaft, 4. Limiting strip, 5. Connecting block, 6. Fixing shaft, 7. Mounting assembly, 701. Mounting structure, 702. Fixing bolt, 703. Connecting structure, 8. Pin structure, 801. Pin, 802. Through hole, 803. Limiting bolt, 9. Connecting assembly, 901. Limiting bolt, 902. Plug, 10. Connecting buckle, 11. Mounting frame, 12. Adjusting bracket, 13. Rotating assembly. Components: 131. Shaft; 132. Bearing; 14. Ball head; 15. Dating hole; 16. Fixed base; 17. Rotating block; 18. Protective cover; 19. Limiting groove; 20. Fixing hole; 21. Fixing head; 22. Dating frame; 23. Dating bolt; 24. First mounting groove; 25. First ball assembly; 26. First docking groove; 27. Second mounting groove; 28. Second docking groove; 29. ​​Second ball assembly; 30. Chassis; 31. Connecting structure. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0033] Please refer to the following: Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 A schematic diagram of the structure of the first embodiment of the convertible and adjustable three-ball seat trailer assembly provided by this utility model; Figure 2 This utility model provides a structural schematic diagram of the chassis; Figure 3 This utility model provides a structural diagram of the docking frame after it has been stored. The convertible and adjustable three-ball seat trailer assembly includes: a fixing frame 1;

[0034] A fixed shaft 6 is installed inside the fixed frame 1 via a connecting structure 31. A second mounting groove 27 is provided on the outer surface of the fixed shaft 6 near the top. A first mating groove 26 is provided on the inner surface of the fixed frame 1. A first ball bearing assembly 25 is provided between the first mating groove 26 and the second mounting groove 27. A mating shaft 3 is fixedly connected to the outer surface of the fixed frame 1. A plurality of fixing holes 20 are provided on the outer surface of the fixed shaft 6.

[0035] Mounting frame 11 is mounted on the outer surface of fixed shaft 6 via connecting structure 31. A docking frame 22 is fixedly connected to the front of mounting frame 11. A second docking groove 28 is formed on the inner surface of docking frame 22. A docking bolt 23 is installed inside docking frame 22 via connecting structure 31. A first mounting groove 24 is formed on the outer surface of docking bolt 23. A second ball set 29 is installed between the first mounting groove 24 and the second docking groove 28. A fixing head 21 is fixedly connected to one end of the front of docking bolt 23. Three ball heads 14 are mounted on the outer surface of fixing head 21 via three fixing bases 16. A base plate 30 is installed at the bottom of docking frame 22.

[0036] The connecting structure 31 is similar to a pin structure. The connecting structure 31 passes through the fixing frame 1 and the fixing shaft 6. The connecting structure 31 passes through the fixing hole 20. The front of the docking frame 22 has an opening for the docking bolt 23 to be inserted. The ball head 14 has a different model. The base 30 is installed at the bottom of the docking frame 22 by positioning screws. The fixing frame 1 and the fixing shaft 6 are also reinforced by positioning screws. The outer surface of the fixing shaft 6 at the top can be tapered. Similarly, an opening matching the tapered top of the fixing shaft 6 needs to be opened inside the fixing frame 1. If necessary, a snap-on column can be installed on the outer surface of the tapered head at the top of the fixing shaft 6 to increase stability.

[0037] The working principle of the convertible adjustable three-ball seat trailer assembly provided by this utility model is as follows:

[0038] A through-type connecting structure 31 is used to install the fixing bracket 1 on the outer surface of the fixing shaft 6. The outer surface of the fixing shaft 6 and the inner surface of the fixing bracket 1 are respectively provided with a second mounting groove 27 and a first mating groove 26. At the same time, the first ball set 25 is installed in the second mounting groove 27 and the first mating groove 26. With the help of the connecting structure 31, the stability of the connection of the fixing shaft 6 can be increased. The mounting frame 11 is also installed on the outer surface of the fixing shaft 6 using the connecting structure 31. A mating frame 22 with a second mating groove 28 is installed on the front of the mounting frame 11. The mating bolt 23 with a first mounting groove 24 is inserted into the interior of the mating frame 22. The second ball set 29 fills the second mating groove 28 and the first mounting groove 24. With the help of the connecting structure 31, the stability of the ball head 14 can be increased. When it is necessary to change the model of the ball head 14, it is only necessary to remove the connecting structure 31 on one side of the mating frame 22. The fixing head 21 can be rotated to allow the mating bolt 23 to rotate inside the mating frame 22, thereby adjusting the position of the ball head 14. After adjustment, the connecting structure 31 is used to fix the mating bolt 23.

[0039] Compared with related technologies, the convertible adjustable three-ball seat trailer assembly provided by this utility model has the following advantages:

[0040] To improve the stability and ease of conversion of the three-ball-mounted trailer assembly, a through-type connecting structure 31 is used to mount the fixing bracket 1 on the outer surface of the fixing shaft 6. A second mounting groove 27 and a first mating groove 26 are respectively formed on the outer surface of the fixing shaft 6 and the inner surface of the fixing bracket 1. Simultaneously, the first ball bearing assembly 25 is installed in the second mounting groove 27 and the first mating groove 26. Combined with the connecting structure 31, this increases the stability of the connection of the fixing shaft 6. The mounting frame 11 is also mounted on the outer surface of the fixing shaft 6 using the connecting structure 31. A mating frame 22 with a second mating groove 28 is mounted on the front of the mounting frame 11, while a first mounting groove... The docking bolt 23 of 24 is inserted into the interior of the docking frame 22. The second ball bearing assembly 29 fills the second docking groove 28 and the first mounting groove 24. With the help of the connecting structure 31, the stability of the ball head 14 can be increased. When it is necessary to change the model of the ball head 14, simply remove the connecting structure 31 on one side of the docking frame 22, and rotate the fixing head 21 to allow the docking bolt 23 to rotate inside the docking frame 22, thereby adjusting the position of the ball head 14. After adjustment, the docking bolt 23 can be fixed with the connecting structure 31. This design improves the stability of the three-ball seat trailer assembly connection and allows for quick conversion of different models of ball heads 14. Example

[0041] Please refer to the following: Figures 4-5 - Figures 6-7 - Figure 8 , Figure 4 A schematic diagram of the structure of a second embodiment of the convertible and adjustable three-ball seat trailer assembly provided by this utility model; Figure 5 A structural schematic diagram of the mounting frame is provided for this utility model; Figure 6 A schematic diagram of the structure of the ball head provided by this utility model; Figure 7 Provided for this utility model Figure 6 An enlarged view of point A shown;

[0042] Figure 8 Provided for this utility model Figure 6 The enlarged view at point B shows a convertible adjustable three-ball-seat trailer assembly based on the first embodiment of this application. The second embodiment of this application proposes another convertible adjustable three-ball-seat trailer assembly. The second embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the independent implementation of the first embodiment.

[0043] Specifically, the difference in the convertible adjustable three-ball-seat trailer assembly provided in the second embodiment of this application is that an adjustment frame 12 is fixedly connected to the front of the mounting frame 11, and a rotating block 17 is rotatably connected to the inside of the adjustment frame 12 near the front via a rotating assembly 13. The rotating assembly 13 includes a rotating shaft 131 and a bearing 132. The rotating shaft 131 is used to install the bearing 132 inside the adjustment frame 12. A docking shaft 3 is fixedly connected to the back of the fixed frame 1. A docking block 5 is fixedly connected to one side of the rotating block 17. Ball heads 14 are installed on the other three sides of the rotating block 17 via a fixed base 16. Two docking holes 15 are opened on the outer surfaces of the ball heads 14 and the docking blocks 5. Two pin structures 8 are provided on the outer surface of the adjustment frame 12.

[0044] The fixing holes 20 are located on both sides of the outer surface of the fixing shaft 6. The connection between the adjusting bracket 12 and the mounting frame 11 is reinforced. The rotating block 17 is a cube. The adjusting bracket 12 has holes corresponding to the position of the docking hole 15 to facilitate the insertion of the pin structure 8. The bearing 132 is also reinforced. With the help of the pin structure 8, the rotating block 17 can be fixed and the stability can be increased. The outer surface of the docking shaft 3 also has holes. The mounting frame 11 is installed in reverse on the outer surface of the fixing shaft 6 so that the ball head 14 can be received below the docking shaft 3.

[0045] The pin structure 8 includes a pin 801, a through hole 802 and a limiting bolt 803. The through hole 802 penetrates the outer surface of the pin 801 near one end to allow the limiting bolt 803 to pass through.

[0046] The limit pin 803 is composed of a foldable patch. After being inserted into the through hole, 802 is folded to fix the pin 801. The pin 801 passes through the mating hole 15 or the fixing hole 20.

[0047] A sealing plate 2 is installed on the top of the fixing frame 1, and a docking buckle 10 is installed at the bottom of the fixing shaft 6. A connecting component 9 is installed inside the docking buckle 10.

[0048] The sealing disc 2 is used to seal the opening at the top of the bracket 1.

[0049] The connecting assembly 9 includes a limiting bolt 901 and a plug 902, the limiting bolt 901 being used to secure the plug 902 after it passes through the mating buckle 10;

[0050] The limiting bolt 901 is similar to a pin structure. It can lock the plug 902 by passing through it. A chain can be hung on the connecting component 9 to facilitate limiting the pin structure 8 and prevent it from falling off after disassembly.

[0051] The top of the mounting frame 11 is fitted with a protective cover 18 via a mounting assembly 7. The mounting assembly 7 includes a mounting structure 701, a fixing bolt 702, and a connecting structure 703. The fixing bolt 702 is used to fix the connecting structure 703 after it is inserted into the mounting structure 701.

[0052] The protective cover 18 covers the top of the adjustment frame 12. The mounting structure 701 has a top opening, and the top of the connecting structure 703 is connected to the protective cover 18.

[0053] Two limiting grooves 19 are provided on the outer surface of the fixed shaft 6, and two limiting strips 4 are fixedly connected to the inner surface of the mounting frame 11.

[0054] The limiting strip 4 is inserted into the limiting groove 19, which can increase the stability of the mounting frame 11 on the outer surface of the fixed shaft 6.

[0055] Compared with related technologies, the convertible adjustable three-ball seat trailer assembly provided by this utility model has the following advantages:

[0056] The working principle of the convertible adjustable three-ball seat trailer assembly provided by this utility model is as follows:

[0057] To increase the stability of the three-ball-end trailer assembly and facilitate ball joint replacement, an adjustment bracket 12 is installed on the front of the mounting frame 11. A rotating block 17 is then installed on the middle of the adjustment bracket 12 near one end of the front via a rotating assembly 13. Three ball joints 14 of different models and a mating block 5 are installed on the outer surface of the rotating block 17. Both the mating block 5 and the three ball joints 14 have two mating holes 15 on their outer surfaces. Using two pin structures 8, the ball joints 14 or mating blocks 5 are connected to the adjustment bracket 12, allowing one of the ball joints 14 to be positioned at the top for easy connection to the structure on the trailer. Next, when it is necessary to adjust the ball head 14 model, simply remove the two pin structures 8, and drive the rotating block 17 to rotate through the rotating component 13. This will allow the ball head 14 of the corresponding model to be positioned above the adjusting frame 12. During this process, the ball head 14 or the connecting block 5 located inside the adjusting frame 12 can be fixed by the pin structure 8. This design uses the rotating component 13 in conjunction with the pin structure 8 to fix the ball head 14, distributing the stress points. This increases stability and reduces deformation at the connection point. Furthermore, it is convenient to operate during later conversions, reducing the difficulty of converting the ball head 14.

[0058] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A convertible and adjustable three-ball-seat trailer assembly, characterized in that, include: Fixture; A fixed shaft is installed inside a fixed frame via a connecting structure. A second mounting groove is provided on the outer surface of the fixed shaft near the top. A first mating groove is provided on the inner surface of the fixed frame. A first ball bearing assembly is provided between the first mating groove and the second mounting groove. A mating shaft is fixedly connected to the outer surface of the fixed frame. A plurality of fixing holes are provided on the outer surface of the fixed shaft. The mounting frame is mounted on the outer surface of the fixed shaft via a connecting structure. A mating frame is fixedly connected to the front of the mounting frame. A second mating groove is formed on the inner surface of the mating frame. A mating bolt is installed inside the mating frame via a connecting structure. A first mounting groove is formed on the outer surface of the mating bolt. A second ball bearing assembly is installed between the first mounting groove and the second mating groove. A fixing head is fixedly connected to one end of the front of the mating bolt. Three ball heads are mounted on the outer surface of the fixing head via three fixing bases. A base plate is installed at the bottom of the mating frame.

2. The convertible adjustable three-ball seat trailer assembly according to claim 1, characterized in that, An adjustment frame is fixedly connected to the front of the mounting frame. A rotating block is rotatably connected to the interior of the adjustment frame near the front via a rotating assembly. The rotating assembly includes a rotating shaft and a bearing. The rotating shaft is used to install the bearing inside the adjustment frame. A mating shaft is fixedly connected to the back of the fixed frame. A mating block is fixedly connected to one side of the rotating block. Ball heads are mounted on the other three sides of the rotating block via fixed bases. Two mating holes are opened on the outer surface of the ball heads and the mating blocks. Two pin structures are provided on the outer surface of the adjustment frame.

3. The convertible adjustable three-ball seat trailer assembly according to claim 2, characterized in that, The pin structure includes a pin, a through hole, and a retaining bolt. The through hole extends through the outer surface of the pin near one end to allow the retaining bolt to pass through.

4. The convertible adjustable three-ball seat trailer assembly according to claim 1, characterized in that, A sealing plate is installed on the top of the fixing frame, and a mating buckle is installed at the bottom of the fixing shaft. A connecting component is installed inside the mating buckle. The connecting component includes a limit bolt and a plug. The limit bolt is used to fix the plug after it passes through the mating buckle.

5. The convertible adjustable three-ball seat trailer assembly according to claim 1, characterized in that, The top of the mounting frame is fitted with a protective cover via a mounting assembly, which includes a mounting structure, fixing bolts, and a connecting structure. The fixing bolts are used to secure the connecting structure after it is inserted into the mounting structure.

6. The convertible adjustable three-ball seat trailer assembly according to claim 1, characterized in that, Two limiting grooves are formed on the outer surface of the fixed shaft, and two limiting strips are fixedly connected to the inner surface of the mounting frame.

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