Tow hook and carrying equipment with same

Abstract

The invention provides a tow hook and carrying equipment with the same, the tow hook comprises a hook body, the hook body comprises a connecting rod, a supporting rod and a connecting ring which are sequentially arranged in the axial direction of the hook body, the connecting rod is used for connecting an anti-collision beam of a vehicle, the connecting ring is used for connecting a fixing rope, and the hook body is made of 42CrMo materials. According to the technical scheme, the supporting rod is designed to be located between the connecting rod and the connecting ring, stress distribution can be optimized, stress concentration can be reduced, the fatigue life of the whole tow hook is prolonged, the hook body is made of the 42CrMo material, and it can be guaranteed that the supporting rod is not prone to deformation and breakage when bearing large fatigue strength. The connecting ring serves as a binding point of the fixing rope, the 42CrMo material can absorb impact energy, damage caused by impact is reduced, and the problem that when the binding angle G between the tow hook and the fixing rope reaches 90 degrees, the tow hook is prone to breakage and even falls off to hurt people is solved.

Description

Technical Field

[0001] This application relates to the field of trailer hitch technology, and more specifically, to a trailer hitch and a transport device having the same. Background Technology

[0002] During automobile transportation, trailer hitches and securing ropes are typically used to secure vehicles. Conventional trailer hitches can usually only withstand tensile and compressive stresses of 5° to 25°. In marine environments, due to wave impacts and ship turbulence, trailer hitches are frequently subjected to abnormal angular tension. Under these abnormal angular conditions, traditional trailer hitches, facing multi-directional composite loads, are prone to failure due to stress concentration. Furthermore, misuse or non-standard operating conditions during daily use may subject trailer hitches to angular loads far exceeding normal ranges, such as offset angles as high as 90°. Use under such extreme conditions can easily cause trailer hitches to break, creating safety hazards. Summary of the Invention

[0003] The main objective of this invention is to provide a trailer hitch and a transport device having the same, so as to solve the technical problem that trailer hitches are prone to breakage in the prior art.

[0004] This application provides a trailer hitch, including: a hook body, and along the axial direction of the hook body, the hook body includes a connecting rod, a support rod and a connecting ring arranged in sequence. The connecting rod is used to connect to the anti-collision beam of the vehicle, and the connecting ring is used to connect to the fixing rope; wherein, the hook body is made of 42CrMo material.

[0005] Furthermore, the length of the support rod is L1, where 110mm≤L1≤143mm.

[0006] Furthermore, the support rod includes a reinforcing section and a main body section. The reinforcing section is located close to the connecting rod, and the radial dimension of the reinforcing section is larger than the radial dimension of the main body section. In addition, the radial dimension of the reinforcing section is larger than the radial dimension of the connecting rod.

[0007] Furthermore, the length of the reinforcing section is L2, and the length of the main body section is L3, wherein 40mm≤L2≤53mm, and / or 70mm≤L3≤90mm.

[0008] Furthermore, the reinforcing section includes a first transition section, an intermediate section, and a second transition section arranged sequentially in a direction away from the connecting rod. The radial dimension of the first transition section gradually increases in a direction away from the connecting rod, and the radial dimension of the second transition section gradually decreases in a direction away from the connecting rod.

[0009] Furthermore, the outer peripheral surface of the first transition section has a first included angle A with the axial direction of the hook body, and the outer peripheral surface of the second transition section has a second included angle B with the axial direction of the hook body, wherein 150°≤A≤170°, and / or 150°≤B≤177°.

[0010] Furthermore, the intermediate section has a first radial dimension D1, and the main body section has a second radial dimension D2, wherein 23mm≤D1≤28mm, and / or 20mm≤D2≤25mm.

[0011] Furthermore, the length of the hook is L4, where 235mm≤L4≤270mm.

[0012] Furthermore, the outer circumferential surface of the connecting rod is provided with an external thread structure, the anti-collision beam is provided with a sleeve, the inner wall of the sleeve is provided with an internal thread structure, the connecting rod is connected to the sleeve through the external thread structure and the internal thread structure, and at least part of the reinforcing section extends into the sleeve.

[0013] According to another aspect of the present invention, a transport device is provided, including a trailer hitch, wherein the trailer hitch is the trailer hitch described above.

[0014] By employing the technical solution of this application, and designing the support rod to be located between the connecting rod and the connecting ring, stress distribution can be optimized, stress concentration reduced, and the fatigue life of the entire trailer hook improved. The use of 42CrMo material in the hook body ensures that the support rod is not easily deformed or broken when subjected to high fatigue strength. As the binding point for the fixing rope, the 42CrMo material in the connecting ring can absorb impact energy, reducing damage caused by impact. This solves the problem that the trailer hook is prone to breakage or even detachment and injury when the binding angle G with the fixing rope reaches 90°. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic diagram of a trailer hitch according to an embodiment of this application;

[0017] Figure 2 This is an optional sectional view of a trailer hitch according to an embodiment of this application;

[0018] Figure 3 This is an optional front view of a trailer hitch according to an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of an optional sleeve nut structure according to an embodiment of this application;

[0020] Figure 5 This is a schematic diagram illustrating an optional use of the trailer hitch according to an embodiment of this application;

[0021] Figure 6 This is a schematic diagram of an optional trailer hitch testing method according to an embodiment of this application.

[0022] The above figures include the following reference numerals:

[0023] 1. Hook body; 2. Anti-collision beam; 3. Fixing rope; 4. Hydraulic cylinder connecting rod; 13. Connecting ring;

[0024] 11. Connecting rod; 110. External thread structure;

[0025] 12. Support rod; 121. Reinforcing section; 122. Main body section; 1211. First transition section; 1212. Intermediate section; 1213. Second transition section;

[0026] 21. Sleeve; 210. Internal thread structure. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0031] Combination Figures 1 to 3 As shown, an embodiment of this application provides a trailer hitch.

[0032] Specifically, the trailer hitch includes a hook body 1. Along the axial direction of the hook body 1, the hook body 1 includes a connecting rod 11, a support rod 12, and a connecting ring 13 arranged in sequence. The connecting rod 11 is used to connect the vehicle's anti-collision beam 2, and the connecting ring 13 is used to connect the fixing rope 3. The hook body 1 is made of 42CrMo material.

[0033] By applying the technical solution of this embodiment, the support rod 12 is designed to be located between the connecting rod 11 and the connecting ring 13, which can optimize stress distribution, reduce stress concentration, and improve the fatigue life of the entire trailer hook. The use of 42CrMo material can ensure that the support rod 12 is not easily deformed or broken when subjected to large fatigue strength. The connecting ring 13 serves as the binding point of the fixing rope. The 42CrMo material can absorb impact energy and reduce damage caused by impact. This solves the problem that the trailer hook is prone to breakage or even falling off and injuring people when the binding angle G with the fixing rope 3 reaches 90°.

[0034] It should be noted that 4242CrMo material is an alloy structural steel, commonly known as 4140 steel. The main components of 42CrMo steel include elements such as carbon (C), chromium (Cr), and molybdenum (Mo), and it has high tensile strength, high toughness, and high wear resistance.

[0035] like Figure 5 As shown, the connecting ring 13 of the fixed rope 3 connects the hook body 1 to the ground or other fixed platforms. Under normal working conditions, the hook body 1 is parallel to the fixed platform, and the binding angle G between the fixed rope 3 and the hook body 1 should be greater than 90°. Under misuse conditions, the binding angle G between the trailer hook and the fixed rope 3 is 90°, and the fixed rope 3 is perpendicular to the fixed platform. During transportation, when there is a large external bump, the hook body 1 is prone to breakage.

[0036] The trailer hitch in this embodiment can be used in working conditions where the transportation environment is relatively bumpy and the fixed platform is frequently subjected to external impacts, such as in maritime transport.

[0037] Specifically, the length of the support rod 12 is L1, where 110mm≤L1≤143mm.

[0038] In this embodiment, the length of the support rod 12 is set within the range of 110mm to 143mm, which helps to balance the stress on each part and enhance the impact and bending resistance of the overall structure. The support rod 12 of this length can provide sufficient rigidity to prevent the hook body 1 from bending excessively under large angle offset conditions.

[0039] By using 42CrMo material to make the hook body 1 and setting a support rod 12 with a relatively long length, the hook body 1 in this embodiment not only meets the standard tensile and compressive working conditions of 5° to 25°, but also improves the impact fatigue strength of the trailer hook under the multi-axis large-angle binding (such as offset angles of more than 70°) and multi-directional composite loads generated by wave impact, which are unique to ship transportation. It also reduces the phenomenon of wheel bolt torque attenuation caused by trailer hook deformation or failure, and can also solve the safety problems caused by traditional trailer hooks being used beyond the regulatory angle conditions in rescue operations.

[0040] Specifically, the support rod 12 includes a reinforcing section 121 and a main body section 122. The reinforcing section 121 is located close to the connecting rod 11. The radial dimension of the reinforcing section 121 is larger than the radial dimension of the main body section 122, and the radial dimension of the reinforcing section 121 is larger than the radial dimension of the connecting rod 11.

[0041] In this embodiment, increasing the radial dimension of the reinforcing section 121 can effectively disperse the stress at the contact point between the connecting rod 11 and the support rod 12, alleviate stress concentration, thereby improving the fatigue life of this part and reducing the risk of breakage during use. Compared with the reinforcing section 121, the main body section 122 adopts a smaller radial dimension design, which can reduce the amount of material used without affecting the overall load-bearing capacity and strength. The radial dimension of the reinforcing section 121 is larger than that of the connecting rod 11, which can form a more stable transition area at the connection between the two, improve the firmness and reliability of the connection, and prevent disengagement or loosening under high load.

[0042] The length of the reinforcing section 121 is L2, and 40mm≤L2≤53mm.

[0043] In this embodiment, the reinforcing section 121 is close to the connecting rod 11, and its length L2 is set to provide sufficient material thickness at the connection point, thereby alleviating stress concentration. The range of 40mm to 53mm ensures the strength near the connection point while also taking into account the lightweight design of the overall structure.

[0044] The length of the main body segment 122 is L3, and 70mm≤L3≤90mm.

[0045] In this embodiment, the length L3 of the main body segment 122 determines the length of the main load-bearing part of the support rod 12. A length of 70mm to 90mm can provide sufficient bending stiffness, making the support rod less prone to bending and deformation, and maintaining a certain degree of toughness.

[0046] Preferably, the reinforcing section 121 includes a first transition section 1211, an intermediate section 1212, and a second transition section 1213 arranged sequentially in a direction away from the connecting rod 11. The radial dimension of the first transition section 1211 gradually increases in a direction away from the connecting rod 11, and the radial dimension of the second transition section 1213 gradually decreases in a direction away from the connecting rod 11.

[0047] In this embodiment, the progressively increasing radial dimension design of the first transition section 1211 helps to form a smooth transition between the connecting rod 11 and the reinforcing section 121, reducing abrupt changes and concentrations of stress, which can significantly improve the fatigue strength of this area and reduce the risk of fracture at the connection. The progressively decreasing radial dimension helps to form a gradual stress distribution at the connection between the reinforcing section 121 and the main body section 122, avoiding stress concentration caused by sudden size changes, and ensuring the reliability of the structure under long-term use or extreme working conditions.

[0048] Specifically, the outer peripheral surface of the first transition section 1211 has a first included angle A with the axial direction of the hook body 1, wherein 150°≤A≤170°.

[0049] In this embodiment, the first included angle A is designed to be 150° to 170°, which can effectively promote the smooth transition of stress and avoid excessive stress at the connection point.

[0050] Specifically, the outer peripheral surface of the second transition section 1213 has a second included angle B with the axial direction of the hook body 1, wherein 150°≤B≤177°.

[0051] In this embodiment, the second included angle B of the second transition section 1213 is designed to be 150° to 177°. The outer peripheral surface of the second transition section 1213 is inclined at a certain angle, which helps to gradually reduce the stress during the transition from the reinforcing section 121 to the main body section 122, thus ensuring the overall stability and durability of the structure.

[0052] Furthermore, the intermediate segment 1212 has a first radial dimension D1, wherein 23mm≤D1≤28mm.

[0053] In this embodiment, the intermediate section 1212 is the core part of the reinforcing section 121. The first radial dimension D1 of the intermediate section 1212 is set between 23mm and 28mm to ensure that the critical area between the connecting rod 11 and the main body section 122 has sufficient length to support the bending stiffness and load-bearing capacity required under high-intensity marine conditions.

[0054] Furthermore, the main body segment 122 has a second radial dimension D2, 20mm≤D2≤25mm.

[0055] In this embodiment, the larger second radial dimension D1 of the main body segment 122 can further enhance the fatigue resistance of the main body segment 122 and reduce the risk of fracture under high load or abnormal angle use.

[0056] Preferably, the length of the hook body 1 is L4, wherein 235mm≤L4≤270mm.

[0057] In this embodiment, the hook body 1 serves as the main load-bearing component of the trailer hook. The setting range of its length L4 helps optimize the hook body's mechanical properties, particularly in terms of tensile strength. A longer hook body 1 can provide a larger cross-sectional area, thereby improving the overall load-bearing capacity and tensile strength of the trailer hook. Simultaneously, a reasonable length also helps control the deformation of the hook body under maritime and misuse conditions, meeting design requirements.

[0058] It should be noted that the misuse condition refers to the condition where the binding angle G between the trailer hook and the fixed rope 3 is 90°.

[0059] Specifically, the outer peripheral surface of the connecting rod 11 is provided with an external thread structure 110, the anti-collision beam 2 is provided with a sleeve 21, the inner wall of the sleeve 21 is provided with an internal thread structure 210, the connecting rod 11 is connected to the sleeve 21 through the external thread structure 110 and the internal thread structure 210, and at least part of the reinforcing section 121 extends into the sleeve 21.

[0060] In this embodiment, the threaded connection between the external thread structure 110 and the internal thread structure 210 ensures a firm fixation between the connecting rod 11 and the anti-collision beam 2. Even when encountering wave impacts in maritime conditions or unstable tension during vehicle rescue use, the stability and reliability of the connection can be maintained. At least part of the reinforcing section 121 extends into the sleeve 21. This design can effectively disperse the stress at the connection point, reduce stress concentration, improve the fatigue strength of the connection part, and thus extend the service life of the trailer hook.

[0061] According to another embodiment of this application, a transport device is provided, including a trailer hitch, wherein the trailer hitch is the one described above.

[0062] The trailer hook in the above embodiments adopts high-strength materials and optimized structural design, which can withstand large tensile forces under maritime conditions and will not break under misuse conditions. When applied to transport equipment, it can significantly improve the safety of the equipment during transportation. It can effectively cope with the multi-axis large-angle lashing (such as offset angles of more than 70°) and multi-directional composite loads generated by wave impacts that are unique to ship transportation. The stability of the transport equipment is enhanced, and accidental losses caused by equipment structural instability are reduced.

[0063] This application also provides a preferred embodiment of a marine trailer hitch.

[0064] like Figures 1 to 3 As shown, the overall structure of the marine trailer hook is a "straight rod + ring" design. The front section adopts an M24×3 thread design, which is matched with the bumper sleeve thread. A reinforcing boss is designed at the root of the thread (i.e., the aforementioned reinforcing section 121) to reduce stress concentration. The rod diameter is slightly smaller so that the trailer hook will not interfere with the front and rear bumpers during the stretching, compression and deformation process.

[0065] The maritime trailer hook in this embodiment can be used for temporary rescue and fixed scenarios in maritime operations, meeting the needs of maritime operations and misuse conditions. By using high-strength materials and structural optimization, it solves the shortcomings of traditional trailer hooks in terms of tensile strength, dynamic stability and environmental adaptability.

[0066] In the embodiments of this application, such as Figure 2 As shown, the length L6 of the trailer hook thread (i.e. the aforementioned external thread structure 110) is 45mm, the thread specification is M24×3-6g, the thread specification diameter is D4, the total length L4 of the trailer hook is 248mm, and the rod length L9 is 178.5mm.

[0067] The diameter of the reinforcing boss at the root of the thread (i.e., the first radial dimension D1 of the aforementioned intermediate section 1212) is 25mm, and the length of the boss (i.e., the length L2 of the aforementioned reinforcing section 121) is 50mm, which is used in conjunction with the anti-collision beam sleeve nut.

[0068] In the connecting ring 13, R1 is 10mm, R2 is 10mm, R3 is 24.5mm, and R4 is 15mm.

[0069] The total length of the first transition section 1211 and the intermediate section 1212 is L8, which is 30mm. The external thread structure 110 has a specification of M24×3. The distance L7 between the first tooth crest of the external thread structure 110 and the end of the connecting rod 11 is 5mm. The length from the support rod 12 to the central axis of the connecting ring 13 is L9, which is 178.5mm. The minor diameter D3 of the external thread structure 110 of the connecting rod 11 is 21.7mm.

[0070] like Figure 4 As shown, the total length L11 of the sleeve nut is 80mm, the inner diameter D4 of the sleeve nut is M24×3, the diameter D6 of the countersunk boss at the tail is 26mm, which mates with the M24 thread structure, the inner thread diameter D5 of the sleeve nut is 22mm, the outer thread diameter D7 of the sleeve nut is 39mm, the length L10 of the root boss of the sleeve nut is 25mm, the distance L13 between the starting position of the sleeve nut and the first thread root is 3mm, and the chamfer C and chamfer E of the sleeve nut are both 45°.

[0071] To prevent stress concentration in the trailer hook from causing failure, the sleeve nut is made of aluminum alloy.

[0072] Specifically, the trailer hook material is 42CrMo, and a heat treatment process is added, with tensile strength ≥1080Mpa, yield strength ≥930Mpa, and surface hardness ≥35HRC.

[0073] The above-mentioned trailer hooks were used to conduct trailer tests. After 2000km of road testing with the container loaded onto the trailer using the trailer hooks and four wheels, the torque of the wheel bolts on both vehicles showed no decrease, meeting the design requirements.

[0074] Specifically, the performance verification of the trailer hitch in this application embodiment is as follows:

[0075] 1) Standard Test (Q / SQR T6-19-2024):

[0076] 25° horizontal tensile and compressive test results: Under 17.5KN, the residual deformation at the applied load point is less than 6MM, and the thread will not fail;

[0077] Horizontal tensile and compression test results: Under a load of 17.5KN, the residual deformation is less than 3MM, and the thread will not fail;

[0078] Results of 5° vertical tensile compression test: Under 17.5KN, the residual deformation at the applied load point is less than 6MM, and the thread will not fail.

[0079] 2) Marine operating condition test (test load 3573KG×0.35×9.81=12.3KN), XY (counterclockwise is a positive angle, clockwise is a negative angle), XZ (vertical to horizontal is a positive angle, and vice versa), the angle of the hydraulic cylinder connecting rod is shown in the diagram. Figure 6 As shown:

[0080] Step ①: 8.86kN, XY: -70°, XZ: -24°, record the displacement-load curve.

[0081] Step ②: 8.86kN, XY: 70°, XZ: -24°, record the displacement-load curve.

[0082] Step ③: 8.86kN, XY: -70°, XZ: -50°, record the displacement-load curve.

[0083] Step 4: 8.86kN, XY: 0°, XZ: -50°, record the displacement-load curve.

[0084] Step 5: 8.86kN, XY: 20°, XZ: -50°, record the displacement-load curve.

[0085] Step 6: 8.86kN, XY: 70°, XZ: -50°, record the displacement-load curve.

[0086] Step 7: After completing the first 6 steps, verify the static load strength performance, horizontal tensile, 5° vertical tensile compression and 25° horizontal tensile compression performance according to the national standard GB 32087-2015 Light Vehicle Traction Device.

[0087] After completing the above steps of the test, the marine hook and the front anti-collision beam structure are intact, the threads are intact, there is no obvious deformation or damage, the mounting bolts are not loose or fallen off, the traction device and the vehicle body have no abnormal noise, and the residual deformation is less than 1mm, which meets the design requirements.

[0088] Furthermore, a misuse test was conducted on the trailer hook of the embodiment of this application. The test equipment was a trailer hook durability testing machine with a tensile and compressive angle of 90° and a test load of 17.5KN. The trailer hook was clamped on the test fixture. The nut structure of the test fixture was the same as that of the anti-collision beam sleeve structure. The material was 45# steel. After the test, the trailer hook did not break and the residual displacement was 9.4mm, which met the design requirements.

[0089] Furthermore, the trailer hook of this application embodiment is coated with paint: cathodic electrophoresis (black), salt spray test for 96 hours, after the test there is no substrate corrosion and no blistering on the main surface; the blistering and corrosion area of ​​defective parts such as edges, welds, and tips is required to be less than 10% of the total defect area.

[0090] Based on the above embodiments, the technical solution of this embodiment can achieve the following beneficial effects:

[0091] 1) Increase the tensile strength of the trailer hitch from 12kN to 17.5kN;

[0092] 2) Under simulated marine conditions, the deformation rate of the trailer hook decreased from 137% to 2.26%, and the residual displacement (the amount of deformation that cannot be recovered after the trailer hook is used) decreased from 94mm to 0.91mm.

[0093] 3) Under misuse conditions (refer to) Figure 5 (As shown) The trailer hook only deformed and did not break.

[0094] Compared with traditional trailer hooks, the dynamic stability optimization results of the marine trailer hook in this embodiment are shown in Table 1 below:

[0095] Table 1:

[0096]

[0097] As shown in Table 1, the trailer hitch in this embodiment has a greater safety redundancy and improved safety in ordinary performance tests. The tensile yield strength of the trailer hitch is also improved, from the tensile strength ≥980Mpa and yield strength ≥785Mpa of the traditional trailer hitch to the tensile strength ≥1080Mpa and yield strength ≥930Mpa. The trailer hitch is a three-component system with strong compatibility and can be applied to various vehicle models.

[0098] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0099] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0100] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0101] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0102] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0103] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0104] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0105] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered as protection of this application.

Claims

1. A trailer hitch, characterized in that, include: The hook body (1) includes a connecting rod (11), a support rod (12) and a connecting ring (13) arranged in sequence along the axial direction of the hook body (1). The connecting rod (11) is used to connect the anti-collision beam (2) of the vehicle, and the connecting ring (13) is used to connect the fixing rope (3). The hook body (1) is made of 42CrMo material.

2. The trailer hitch according to claim 1, characterized in that, The length of the support rod (12) is L1, wherein 110mm≤L1≤143mm.

3. The trailer hitch according to claim 2, characterized in that, The support rod (12) includes a reinforcing section (121) and a main body section (122). The reinforcing section (121) is located close to the connecting rod (11). The radial dimension of the reinforcing section (121) is greater than the radial dimension of the main body section (122). The radial dimension of the reinforcing section (121) is also greater than the radial dimension of the connecting rod (11).

4. The trailer hitch according to claim 3, characterized in that, The length of the reinforcing section (121) is L2, and the length of the main body section (122) is L3, wherein 40mm≤L2≤53mm, and / or 70mm≤L3≤90mm.

5. The trailer hitch according to claim 3 or 4, characterized in that, The reinforcing section (121) includes a first transition section (1211), an intermediate section (1212), and a second transition section (1213) arranged sequentially in a direction away from the connecting rod (11). The radial dimension of the first transition section (1211) gradually increases in a direction away from the connecting rod (11), and the radial dimension of the second transition section (1213) gradually decreases in a direction away from the connecting rod (11).

6. The trailer hitch according to claim 5, characterized in that, The outer peripheral surface of the first transition section (1211) has a first included angle A with the axial direction of the hook body (1), and the outer peripheral surface of the second transition section (1213) has a second included angle B with the axial direction of the hook body (1), wherein 150°≤A≤170°, and / or 150°≤B≤177°.

7. The trailer hitch according to claim 5, characterized in that, The intermediate segment (1212) has a first radial dimension D1, and the main body segment (122) has a second radial dimension D2, wherein 23mm≤D1≤28mm, and / or 20mm≤D2≤25mm.

8. The trailer hitch according to claim 4, characterized in that, The length of the hook (1) is L4, wherein 235mm≤L4≤270mm.

9. The trailer hitch according to claim 3, characterized in that, The outer circumferential surface of the connecting rod (11) is provided with an external thread structure (110), the anti-collision beam (2) is provided with a sleeve (21), the inner wall of the sleeve (21) is provided with an internal thread structure (210), the connecting rod (11) is connected to the sleeve (21) through the external thread structure (110) and the internal thread structure (210), and at least part of the reinforcing section (121) extends into the sleeve (21).

10. A transport device, characterized in that, Includes a trailer hitch, wherein the trailer hitch is any one of claims 1-9.

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