Trailer chassis

Abstract

The invention belongs to the technical field of trailers, and particularly relates to a trailer chassis which comprises a frame. A plurality of pairs of Mecanum wheel systems; a plurality of pairs of unpowered traction wheel systems; each unpowered traction wheel system comprises a supporting mechanism, an unpowered traction wheel and a lifting adjusting mechanism. Rapid transition traction is performed through the unpowered traction wheel system under traction of a traction locomotive, middle and long distance consignment work is achieved, hanging work is completed through precise movement and positioning of the Mecanum wheel system in a narrow space, lifting adjustment is performed on the unpowered traction wheels through the lifting adjustment mechanism, and the lifting adjustment is completed. Therefore, the chassis can be controlled to ascend and descend, automatic switching of the two wheel trains can be achieved, the device can adapt to complex and changeable working environments, the device has the advantages of being low in equipment hanging working height, high in positioning precision, flexible, convenient to operate and high in transportation transition efficiency, the working efficiency of the whole device is improved, and the working efficiency of the whole device is improved. And the manual operation difficulty is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of trailers, and in particular relates to a trailer chassis. Background Art

[0002] A trailer is a special vehicle that needs to be towed by a tractor. Due to its high load-bearing capacity, it has been widely used in the field of equipment transportation. It can effectively realize medium and long-distance towing transportation and meet the needs of rapid transfer of goods.

[0003] However, although existing trailers have many advantages in cargo transportation, their maneuverability is poor when performing precise mounting operations in a small space; specifically, they are difficult to achieve precise movement and positioning in a limited space, and thus cannot adapt to complex and changing operating environments. This not only greatly increases the difficulty of operation, but also directly leads to a decrease in equipment mounting efficiency, which in turn affects overall work efficiency and transportation costs. Summary of the invention

[0004] The purpose of the present invention is to provide a trailer chassis, which solves the technical problems of low walking positioning accuracy, weak maneuverability and inconvenient space operation of trailers in the prior art.

[0005] In a first aspect, the present invention discloses a trailer chassis, comprising: Frame; A plurality of pairs of Mecanum wheel systems are respectively installed at two ends of the frame, and each pair of the Mecanum wheel systems are relatively arranged on two sides of the frame; A plurality of pairs of unpowered traction wheel systems are respectively installed at both ends of the frame, and each pair of the unpowered traction wheel systems are relatively arranged on two sides of the frame; Wherein, each of the unpowered traction wheel systems comprises: Support mechanism; An unpowered traction wheel is installed on the supporting mechanism; The lifting and lowering adjustment mechanism is installed between the frame and the supporting mechanism and is used for controlling the lifting and lowering of the unpowered traction wheel.

[0006] The present application uses an unpowered traction wheel system to perform rapid transfer traction under the traction of a traction locomotive to achieve medium and long-distance consignment work, and uses a Mecanum wheel system to accurately move and position in a small space to complete the hanging work, and then uses a lifting and adjusting mechanism to lift and adjust the unpowered traction wheel, thereby controlling the chassis to be lifted and lowered, and realizing automatic switching of the two wheel systems, which can adapt to complex and changeable working environments, and not only has the advantages of low equipment hanging working height, high positioning accuracy and maneuverability, but also has the advantages of easy operation and high transportation and transfer efficiency, which improves the working efficiency of the entire set of equipment and greatly reduces the difficulty of manual work.

[0007] On the basis of the above technical solution, the solution of this application can also be improved as follows: Preferably, the frame comprises: Two main longitudinal beams, arranged horizontally and spaced side by side; A plurality of flat cross beams are arranged horizontally and disposed between the two main longitudinal beams and are arranged at intervals along the axis direction of the main longitudinal beams; A plurality of groups of secondary longitudinal beams are arranged horizontally and are disposed one by one between two adjacent flat beams, and the secondary longitudinal beams in each group are arranged at intervals along the axis direction of the flat beam; Two groups of side cross beams are arranged horizontally and are respectively provided on the outsides of the two main longitudinal beams, and the side cross beams in each group are arranged at intervals along the axial direction of the main longitudinal beams; this scheme ensures structural strength, load-bearing capacity and lightness, and designs the frame as a concave structure, so that the middle hanging area is spacious, ensuring that during the hanging operation, the frame and various parts of the equipment body can maintain a sufficient safety distance, thereby avoiding any interference in space, and leaving a group of installation space for the hanging mechanism on the left and right sides of the hanging area, so that one vehicle can be hung with two, thereby improving the efficiency of equipment hanging.

[0008] Preferably, the frame comprises: The two support frames are arranged horizontally and are respectively disposed in the middle of the outer sides of the two main longitudinal beams, and the two ends are respectively connected to the adjacent side cross beams to jointly constitute a placement area. By adopting this solution, two independent placement areas are formed on both sides of the frame, which have a stable structure and strong bearing capacity. They can be used for the placement and fixation of power batteries and electronic control devices, ensuring the stability and safety of these key components during the operation of the vehicle, and improving the structural compactness of the entire vehicle, greatly optimizing space utilization and avoiding unnecessary waste of space.

[0009] Preferably, the Mecanum wheel system comprises: Mecanum wheel; A platform plate, mounted on the side of the frame; An installation base plate is arranged above the platform plate; A rotary drive assembly is mounted on the mounting base plate and is drivingly connected to the Mecanum wheel; A vertical guide assembly installed between the platform plate and the installation base plate; A plurality of shock-absorbing components are respectively installed at both ends of the mounting base plate and connected to the platform plate. The present solution can absorb and disperse the impact and vibration from the road surface, protect the system from damage, and ensure that each Mecanum wheel can touch the ground normally even on an uneven road surface, and no Mecanum wheel will slip in the air, thereby ensuring the walking positioning accuracy.

[0010] Preferably, the vertical guide assembly comprises: A T-shaped guide rail is arranged vertically and installed on the installation base plate; A guide rail slide seat is arranged vertically and installed on the top surface of the platform plate, and a T-shaped slide groove matching the T-shaped guide rail is opened on the side; The wear-resistant gasket is installed at the bottom of the T-shaped slide groove. With this solution, stable guidance and precise movement in the vertical direction are achieved, the components fit firmly, the structural strength is high, the stability and reliability are improved, and the use requirements under complex working conditions can be met. In addition, the friction and wear are small and the service life is long.

[0011] Preferably, the shock absorbing assembly comprises: A fixing block, fixedly connected to the mounting base plate; A first nut, arranged above the fixing block; A first spring, constrained between the fixed block and the platform plate; The first bolt and the screw rod pass through the platform plate, the first spring and the fixing block in sequence from bottom to top and are threadedly connected with the first nut; this solution ensures a stable and reliable connection, and has the advantages of compact structure, firm connection, strong bearing capacity and long service life, is easy to install and manufacture, has a good comprehensive use effect, and provides a strong guarantee for the long-term stable operation of the equipment.

[0012] Preferably, the lifting and lowering adjustment mechanism comprises: A protective cover, mounted on the side of the frame and located above the supporting mechanism; A lifting cylinder is installed on the top surface of the support mechanism, and the piston rod is connected to the protective cover; A plurality of guide seats are installed on the top surface of the support mechanism and arranged around the lifting cylinder; A plurality of guide rods correspond one-to-one with the guide seats and are installed in the protective cover and vertically slide with the corresponding guide seats. This solution plays a role of protection and isolation, prevents external debris or dust from falling into the system, and ensures the stability and accuracy of the lifting process.

[0013] Preferably, the supporting mechanism comprises: roof; Two side panels are arranged oppositely on both sides of the bottom surface of the top panel; A support plate, provided at one end of the two side plates; The concave plate has two sides respectively fitted with the outer side surfaces of the two side plates and is hinged via a support shaft, and the inner side is rotatably connected to the unpowered traction wheel; A handbrake assembly, mounted on the concave plate and corresponding to the unpowered traction wheel; A connecting plate, arranged at the end of the concave plate and corresponding to the supporting plate; A second nut is arranged above the support plate; a second spring constrained between the second nut and the support plate; The second bolt and the screw rod pass through the connecting plate, the supporting plate and the second spring in sequence from bottom to top and are threadedly connected with the second nut; this solution ensures the structural strength and the load-bearing capacity, and can perform buffering and shock absorption, thereby avoiding large bumps on the vehicle body during towing and transportation, and ensuring the stability of the load during transportation.

[0014] Preferably, the supporting mechanism further comprises: A convex shaft is arranged vertically and is provided on the bottom surface of the top plate; A rotating disk is rotatably sleeved on the convex shaft and disposed between the two side plates; The thrust ball bearing is coaxially arranged with the convex shaft and is provided between the top plate and the rotating disk. By adopting this solution, the supporting mechanism not only has the original supporting and connecting functions, but also increases the ability of rotation adjustment, so that the unpowered traction wheel can flexibly adjust the direction, and the overall structure is firmly connected, the rotation is smooth and stable, and it can be used stably for a long time.

[0015] Preferably, the two side panels are fixedly connected to the top panel; adopting this solution ensures a stable connection and improves the overall structural strength.

[0016] Through the above technical solution, the present invention achieves the following beneficial effects: 1. This application uses an unpowered traction wheel system to quickly transfer traction under the traction of a traction locomotive to achieve medium and long-distance consignment work, and uses a Mecanum wheel system to accurately move and position in a small space to complete the hanging work, and then uses a lifting and adjustment mechanism to lift and adjust the unpowered traction wheel, so as to control the chassis to lift and lower, and realize automatic switching of the two wheel systems, which can adapt to complex and changeable working environments, and not only has the advantages of low equipment hanging working height, high positioning accuracy and maneuverability, but also has the advantages of easy operation and high transportation and transfer efficiency, which improves the working efficiency of the entire set of equipment and greatly reduces the difficulty of manual work; 2. This application ensures the structural strength, load-bearing capacity and lightness of the frame, and designs the frame into a concave structure, so that the middle hanging area is spacious, ensuring that during the hanging operation, the frame and each part of the equipment body can maintain a sufficient safety distance, thereby avoiding any interference in space. A set of installation space for the hanging mechanism is also reserved on the left and right sides of the hanging area, which can realize double hanging on one vehicle, thereby improving the efficiency of equipment hanging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a trailer chassis according to a specific embodiment of the present invention; Figure 2 for Figure 1 The structural schematic diagram of the frame in the trailer chassis shown; Figure 3 for Figure 1 The shown trailer chassis is a top view after removing the top cover at one end; Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 for Figure 1 The schematic diagram of the structure of the Mecanum wheel system in the trailer chassis shown; Figure 6 for Figure 5 A schematic diagram of the structure of the installation base plate in the Mecanum wheel system shown; Figure 7 for Figure 1 The structural schematic diagram of the unpowered traction wheel system in the trailer chassis shown; Figure 8 for Figure 7A cross-sectional schematic diagram of the unpowered traction wheel system shown; Fig. 9 for Figure 7 A schematic diagram of the structure of the top plate in the unpowered traction wheel system shown; Fig.10 for Figure 7 A schematic diagram of the structure of the concave plate in the unpowered traction wheel system shown; Fig.11 for Figure 7 The structural schematic diagram of the rotating disk in the unpowered traction wheel system shown; Fig.12 Another structural schematic diagram of the support mechanism in a specific embodiment of the present invention; Fig.13 for Figure 1 The trailer chassis is shown in a schematic diagram of a state where the traction wheel is lifted and retracted; Fig.14 for Figure 1 The trailer chassis is shown in a schematic diagram of a state where the traction wheel is lowered and deployed; Fig.15 for Figure 1 Schematic diagram of the working status of the trailer chassis shown.

[0019] Description of reference numerals: 1. Frame; 2. Mecanum wheel system; 3. Unpowered traction wheel system; 11. Main longitudinal beam; 12. Flat cross beam; 13. Secondary longitudinal beam; 14. Side cross beam; 15. Support frame; 16. Guide rail welding plate; 21. Mecanum wheel; 22. Platform plate; 23. Mounting base plate; 24. Rotation drive assembly; 25. Vertical guide assembly; 26. Shock absorption assembly; 27. Top cover; 31. Support mechanism; 32. Unpowered traction wheel; 33. Lifting and lowering adjustment mechanism; 251, T-type guide rail; 252, guide rail slide; 253, wear-resistant gasket; 261, fixing block; 262, first nut; 263, first spring; 264, first bolt; 265, cotter pin; 311, top plate; 312, side plate; 313, support plate; 314, concave plate; 315, handbrake assembly; 316, connecting plate; 317, second nut; 318, second spring; 319, second bolt; 31A, convex shaft; 31B, rotating plate; 31C, thrust ball bearing; 31D, deep groove ball bearing; 31E, locking nut; 331. Protective cover; 332. Lifting cylinder; 333. Guide seat; 334. Guide rod. DETAILED DESCRIPTION

[0020] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0021] First of all, it should be noted that in the following description, some directional words involved in order to clearly illustrate the technical solution of the present invention, such as the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., are all meanings inferred from the normal directions of parts in the trailer chassis. They 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] In addition, 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0023] In this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Example: like Figure 1 As shown, an embodiment of the present application discloses a trailer chassis that can take into account both rapid transition traction and precise walking and mounting, and its specific structure includes: a frame 1, multiple pairs of Mecanum wheel systems 2 and multiple pairs of unpowered traction wheel systems 3.

[0026] The vehicle frame 1 serves as the support and connection basis of the entire chassis.

[0027] A plurality of pairs of Mecanum wheel systems 2 are respectively installed at both ends of the frame 1, and each pair of Mecanum wheel systems 2 are relatively arranged on both sides of the frame 1 to provide omnidirectional mobility, so that the trailer can be flexibly operated in a small or complex space.

[0028] A plurality of pairs of unpowered traction wheel systems 3 are respectively installed at both ends of the vehicle frame 1, and each pair of unpowered traction wheel systems 3 are relatively arranged on both sides of the vehicle frame 1 to achieve the function of rapid transfer traction.

[0029] Exemplarily, two pairs of Mecanum wheel systems 2 and unpowered traction wheel systems 3 are provided, which not only ensures driving stability but also reduces manufacturing costs, but is not limited to this, and there may be more pairs, which is not specifically limited.

[0030] Each unpowered traction wheel system 3 includes a support mechanism 31, an unpowered traction wheel 32 and a lifting and lowering adjustment mechanism 33, and is specifically configured as follows: The support mechanism 31 serves as a mounting base for the unpowered traction wheel 32 and is used to provide a stable support; The unpowered traction wheel 32 is installed on the support mechanism 31 to achieve traction and dragging; The lifting and lowering adjustment mechanism 33 is installed between the frame 1 and the supporting mechanism 31, and is used to control the lifting and lowering of the unpowered traction wheel 32.

[0031] The working principle of the above technical solution is as follows: When switching to the precise walking mounting mode, Fig.13 As shown, the unpowered traction wheel system 3 is adjusted, specifically, the support mechanism 31 is controlled to rise through the lifting adjustment mechanism 33, so that the unpowered traction wheel 32 is lifted and retracted until the unpowered traction wheel 32 is off the ground and the Mecanum wheel system 2 is on the ground; at this time, by driving and controlling each Mecanum wheel system 2, precise mounting operations in a small space can be achieved.

[0032] When switching to the fast transition traction mode, such as Fig.14 As shown, the unpowered traction wheel system 3 is adjusted, specifically, the support mechanism 31 is controlled to descend through the lifting adjustment mechanism 33, so that the unpowered traction wheel 32 is lowered and deployed, until the unpowered traction wheel 32 touches the ground and the Mecanum wheel system 2 is off the ground; at this time, the trailer is towed by the tractor to achieve rapid transfer.

[0033] The present invention uses the unpowered traction wheel system 3 to perform rapid transfer traction under the traction of a traction locomotive to achieve medium and long-distance shipping work, and uses the Mecanum wheel system 2 to accurately move and position in a small space to complete the hanging work, and then uses the lifting and adjusting mechanism 33 to lift and adjust the unpowered traction wheel 32, so that the chassis can be controlled to be lifted and lowered, and the automatic switching of the two wheel systems can be achieved. It can adapt to complex and changeable working environments, and not only has the advantages of low equipment hanging working height, high positioning accuracy and maneuverability, but also has the advantages of easy operation and high transportation and transfer efficiency, thereby improving the working efficiency of the entire set of equipment and greatly reducing the difficulty of manual work.

[0034] In some embodiments, Figure 2 and Fig.15 As shown, the frame 1 includes: two main longitudinal beams 11, a plurality of flat cross beams 12, a plurality of groups of secondary longitudinal beams 13 and two groups of side cross beams 14, and the specific configuration is as follows: Two main longitudinal beams 11 are arranged horizontally and spaced side by side as the main supporting structure; A plurality of flat cross beams 12 are arranged horizontally and disposed between the two main longitudinal beams 11 and are arranged at intervals along the axis direction of the main longitudinal beams 11, and are used to connect the two main longitudinal beams 11 to enhance the lateral stability and load-bearing capacity; A plurality of groups of secondary longitudinal beams 13 are arranged horizontally and are disposed one by one between two adjacent flat beams 12, and the secondary longitudinal beams 13 in each group are arranged at intervals along the axis direction of the flat beam 12, and are used to connect the flat beam 12 to enhance longitudinal stability and load-bearing capacity; The two groups of side cross beams 14 are arranged horizontally and are respectively disposed on the outsides of the two main longitudinal beams 11, and the side cross beams 14 in each group are arranged at intervals along the axial direction of the main longitudinal beams 11 to provide stable support for the Mecanum wheel system 2 and the unpowered traction wheel system 3.

[0035] Specifically, the main longitudinal beam 11 and the side cross beam 14 both adopt rectangular tubes of the same specification of 120mm×60mm×4mm, thereby improving the structural regularity and ensuring the connection strength between the two; the flat cross beam 12 is composed of channel steel and high-strength steel plate welded together to ensure the load strength.

[0036] Preferably, a guide rail welding plate 16 is provided on the top surface of the flat cross beam 12, and a T-shaped groove is provided on the top surface of the guide rail welding plate 16 to facilitate the longitudinal adjustment and fixation of the bracket base.

[0037] Exemplarily, six flat cross beams 12 are provided; each group of secondary longitudinal beams 13 has two and are symmetrical to each other; each group of side cross beams 14 is provided with six, so that two wheel train installation areas are formed at each end of the frame 1.

[0038] Through the above-mentioned structural design, the structural strength, load-bearing capacity and light weight are guaranteed, and the frame 1 is designed as a concave structure, so that the middle hanging area is spacious, ensuring that during the hanging operation, the frame 1 and each part of the equipment body can maintain a sufficient safety distance, thereby avoiding any interference in space, and leaving a group of installation space for the hanging mechanism on the left and right sides of the hanging area, so that one vehicle can be hung with two parts, thereby improving the efficiency of equipment hanging.

[0039] Based on the above embodiments, Figure 1 , Figure 2 and Fig.15As shown, the vehicle frame 1 includes: two support frames 15, which are arranged horizontally and are respectively provided at the middle of the outer sides of the two main longitudinal beams 11, and the two ends are respectively connected to the adjacent side cross beams 14 to jointly form a placement area.

[0040] Specifically, the support frame 15 is composed of two L-shaped channel steels and a plurality of strips; wherein the plurality of strips are arranged between the two L-shaped channel steels at intervals.

[0041] Through the above arrangement, two independent placement areas are formed on both sides of the frame 1, which have a stable structure and strong bearing capacity and can be used for the placement and fixation of power batteries and electronic control devices, ensuring the stability and safety of these key components during vehicle operation, and improving the structural compactness of the entire vehicle, greatly optimizing space utilization and avoiding unnecessary waste of space.

[0042] In some embodiments, Figure 2 , Figure 5 and Figure 6 As shown, the Mecanum wheel system 2 includes: a Mecanum wheel 21, a platform plate 22, a mounting base plate 23, a rotation drive assembly 24, a vertical guide assembly 25 and a plurality of shock absorbing assemblies 26, which are specifically configured as follows: The Mecanum wheel 21 has a unique roller layout and can achieve omnidirectional movement. Its specific structure belongs to the prior art, so it will not be described here; The platform plate 22 is installed on the side of the frame 1, and is specifically installed in the wheel system installation area surrounded by the main longitudinal beam 11 and two adjacent side cross beams 14, for providing stable support; The mounting base plate 23 is arranged above the platform plate 22 and is used to carry other components; The rotation drive assembly 24 is installed on the mounting base plate 23 and is in transmission connection with the Mecanum wheel 21, so as to drive the Mecanum wheel 21 to rotate; The vertical guide assembly 25 is installed between the platform plate 22 and the mounting base plate 23 to ensure that the mounting base plate 23 remains stable in the vertical direction and to ensure that the system does not deviate or shake during operation; A plurality of shock absorbing components 26 are respectively mounted on both ends of the mounting base plate 23 and connected to the platform plate 22 to absorb and disperse the impact and vibration from the road surface and protect the system from damage.

[0043] During operation, the rotary drive assembly 24 can drive the Mecanum wheel 21 to rotate, and the mounting base plate 23 can be raised and lowered relative to the platform plate 22 through the vertical guide assembly 25, and is flexibly connected to the platform plate 22 through the shock absorbing assembly 26, so as to avoid transmitting the vibration from the impact of the road surface to the platform plate 22.

[0044] Through the above arrangement, the impact and vibration from the road surface can be absorbed and dispersed, the system can be protected from damage, and even on an uneven road surface, each Mecanum wheel 21 can be ensured to land normally, and no Mecanum wheel 21 will be suspended and slipped, thereby ensuring the walking positioning accuracy.

[0045] Preferably, the Mecanum wheel system 2 further includes a top cover 27, which is arranged above the remaining components and overlapped on two adjacent side beams 14, and is used to cover and protect the components below, thereby preventing them from being affected by the external environment.

[0046] Based on the above embodiments, Figure 5 As shown, the vertical guide assembly 25 includes: a T-shaped guide rail 251, a guide rail slide 252 and a wear-resistant gasket 253, which are specifically configured as follows: The T-shaped guide rail 251 is arranged vertically and mounted on the mounting base plate 23; The guide rail slide 252 is arranged vertically and installed on the top surface of the platform plate 22, and a T-shaped slide groove matching the T-shaped guide rail 251 is opened on the side; The wear-resistant gasket 253 is installed at the bottom of the T-shaped slide groove. It is made of a high-strength, high-wear-resistant material, such as copper, and can effectively reduce friction and wear, thereby extending the service life.

[0047] Preferably, Figure 6 As shown, a vertical mounting groove is provided on the inner side surface of the mounting base plate 23 for limiting the mounting of the T-shaped guide rail 251, thereby improving the tightness of the connection between the two.

[0048] Through the above-mentioned further design of the vertical guide assembly 25, stable guidance and precise movement in the vertical direction are achieved, the components are firmly matched, the structural strength is high, the stability and reliability are improved, and the use requirements under complex working conditions can be met, and the friction and wear are small, and the service life is long.

[0049] Based on the above embodiments, Figure 5 As shown, the shock absorbing assembly 26 includes: a fixing block 261, a first nut 262, a first spring 263 and a first bolt 264, which are specifically arranged as follows: The fixing block 261 is fixedly connected to the mounting base plate 23; The first nut 262 is arranged above the fixing block 261, and its material and thread specification are matched with the first bolt 264 to ensure the firmness and reliability of the connection; The first spring 263 is constrained between the fixed block 261 and the platform plate 22; The screw rod of the first bolt 264 passes through the platform plate 22 , the first spring 263 and the fixing block 261 in sequence from bottom to top and is then threadedly connected with the first nut 262 .

[0050] Preferably, a flat washer is provided between the first nut 262 and the fixing block 261 , and the flat washer is sleeved on the first bolt 264 , which plays a role in avoiding hard connection, can buffer and reduce shock, and improve stability.

[0051] Preferably, a plurality of slots are provided at the top of the first nut 262, and a cotter pin 265 is laterally inserted at the top of the first bolt 264, and the cotter pin 265 is engaged with the slot, which prevents the bolt from loosening or even coming loose due to impact, vibration and other factors, thereby improving stability and reliability and ensuring that the component can work stably for a long time.

[0052] During operation, the mounting base plate 23 and the platform plate 22 are connected by the first bolt 264 and the fixing block 261, thereby ensuring the connection firmness. When a Mecanum wheel 21 moves to the suspended area, the Mecanum wheel 21 drives the mounting base plate 23 to descend, and the mounting base plate 23 drives the fixing block 261 to descend. The fixing block 261 can apply a force to the first spring 263 to cause it to produce elastic deformation, thereby absorbing and dispersing the energy, playing a role of buffering and shock absorption, and also preventing the Mecanum wheel 21 from slipping in the air.

[0053] Through the above-mentioned further design of the shock-absorbing component 26, the connection is stable and reliable, and it has the advantages of compact structure, firm connection, strong bearing capacity and long service life. It is also easy to install and manufacture, and has a good comprehensive use effect, providing a strong guarantee for the long-term stable operation of the equipment.

[0054] In some embodiments, Figure 2 , Figure 7 and Figure 8 As shown, the lifting and adjusting mechanism 33 includes: a protective cover 331, a lifting cylinder 332, a plurality of guide seats 333 and a plurality of guide rods 334, which are specifically configured as follows: The protective cover 331 is installed on the side of the frame 1 and is located above the support mechanism 31 to protect it from foreign debris or dust. The lifting cylinder 332 is installed on the top surface of the support mechanism 31, and the piston rod is connected to the protective cover 331. It is preferably provided with a threaded hole on the top, and then fixed to the protective cover 331 by screws; A plurality of guide seats 333 are mounted on the top surface of the support mechanism 31 and arranged around the lifting cylinder 332. Preferably, there are two guide seats 333 and they are cylindrical in structure. The plurality of guide rods 334 correspond to the guide seats 333 one by one, are installed in the protective cover 331 , and vertically slideably cooperate with the corresponding guide seats 333 .

[0055] Exemplarily, two guide seats 333 and two guide rods 334 are provided, and are symmetrically arranged on both sides of the lifting cylinder 332, so as to ensure uniform force; the guide seat 333 is cylindrical and is slidably connected to the corresponding guide rod 334, which improves the firmness of the guide.

[0056] During lifting and lowering adjustment, the lifting and lowering of the support mechanism 31 is achieved by the extension and retraction of the piston rod of the lifting and lowering adjustment mechanism 33, and the vertical sliding cooperation of the guide seat 333 and the guide rod 334 ensures the stability and accuracy of the lifting process.

[0057] Through the further design of the lifting and adjusting mechanism 33, a protection and isolation function is achieved, which prevents foreign debris or dust from falling into the system and ensures the stability and accuracy of the lifting process.

[0058] In some embodiments, Figure 7 to Figure 12 As shown, the support mechanism 31 includes: a top plate 311, two side plates 312, a support plate 313, a concave plate 314, a hand brake assembly 315, a connecting plate 316, a second nut 317, a second spring 318 and a second bolt 319, which are specifically arranged as follows: The top plate 311 is the main bearing member, and the top surface is used to install the lifting and adjusting mechanism 33; Two side panels 312 are disposed opposite to each other on both sides of the bottom surface of the top panel 311 to provide structural support; The support plate 313 is disposed at one end of the two side plates 312, and preferably has a concave structure to enhance the structural strength and bearing capacity, and improve the firmness of the connection with the side plates 312; The two sides of the concave plate 314 are respectively fitted with the outer side surfaces of the two side plates 312 and are hinged through a support shaft, and the inner side is rotatably connected with a non-powered traction wheel 32; The handbrake assembly 315 is mounted on the concave plate 314 and corresponds to the unpowered traction wheel 32, and is used to lock the unpowered traction wheel 32 when necessary to prevent the vehicle from moving; The connecting plate 316 is disposed at the end of the concave plate 314 and corresponds to the supporting plate 313; The second nut 317 is arranged above the support plate 313; The second spring 318 is constrained between the second nut 317 and the support plate 313; The screw rod of the second bolt 319 passes through the connecting plate 316 , the supporting plate 313 and the second spring 318 in sequence from bottom to top and is then threadedly connected with the second nut 317 .

[0059] It should be noted that the second nut 317 , the second spring 318 and the second bolt 319 correspond one to one and can be provided in two groups or more to further improve the buffering and shock absorbing capability, which is not specifically limited.

[0060] Exemplarily, the unpowered traction wheel 32 is an iron core rubber wheel, which has the ability to be towed at a relatively fast speed and can reduce vibration and impact to a certain extent, thereby improving driving stability.

[0061] The working principle of the above technical solution is as follows: When the lifting adjustment mechanism 33 drives the supporting mechanism 31 to descend to a certain height, the unpowered traction wheel 32 touches the ground and overcomes its own weight to achieve jacking. The stiffness of the second spring 318 is designed to adapt to the entire load, and the preload force of the second spring 318 can be changed by adjusting the tightness of the second nut 317.

[0062] like Figure 7 and Figure 8 As shown, a set of lever mechanisms are formed at both ends of the concave plate 314, and the hinge point is the lever fulcrum; therefore, when the grounded unpowered traction wheel 32 passes through a bumpy road surface, the load on the concave plate 314 will increase, so the concave plate 314 will slightly rotate counterclockwise around the support shaft, causing the chassis height to slightly decrease, and drive the connecting plate 316 to move downward, the connecting plate 316 will pull the second bolt 319, the second bolt 319 drives the second nut 317, and the second nut 317 applies a force to the second spring 318, thereby causing it to produce elastic deformation.

[0063] Through the further design of the supporting mechanism 31, the structural strength and the load-bearing capacity are guaranteed, and the shock absorption can be performed, so that the vehicle body can be prevented from being shaken greatly during the towing transportation, and the stability of the load during the transportation is guaranteed.

[0064] On the basis of the above embodiment, the unpowered traction wheel system 3 is provided with two pairs, and the front pair is provided as universal wheels, and the rear pair is provided as directional wheels.

[0065] If the unpowered traction wheel system 3 is configured as a universal wheel, Figure 7 to Figure 11 As shown, the support mechanism 31 also includes: a convex shaft 31A, a rotating disk 31B and a thrust ball bearing 31C, which are specifically configured as follows: The convex shaft 31A is arranged vertically and is disposed on the bottom surface of the top plate 311, providing a stable rotation center; The rotating disk 31B is rotatably sleeved on the convex shaft 31A and is disposed between the two side plates 312; The thrust ball bearing 31C is coaxially arranged with the convex shaft 31A and is provided between the top plate 311 and the rotating disk 31B.

[0066] Specifically, the bottom surface of the top plate 311 and the top surface of the rotating disk 31B are both provided with limiting ring grooves for installing the thrust ball bearing 31C, thereby improving the installation stability and the compactness of the structure.

[0067] Preferably, a deep groove ball bearing 31D is embedded in the bottom surface of the rotating disk 31B, and the deep groove ball bearing is sleeved on the convex shaft 31A. The bottom of the convex shaft 31A is provided with threads and keyway holes, and is fixed and locked with the brake washer by a locking nut 31E, which improves the connection firmness and facilitates disassembly and replacement.

[0068] Through the above arrangement, the support mechanism 31 not only has the original support and connection functions, but also has the ability of rotation adjustment, so that the unpowered traction wheel 32 can flexibly adjust the direction, and the overall structure is firmly connected, rotates smoothly and stably, and can be used stably for a long time.

[0069] If the unpowered traction wheel system 3 is configured as a directional wheel, such as Fig.12 As shown, the two side panels 312 are fixedly connected to the top panel 311, which ensures a stable connection and improves the overall structural strength.

[0070] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A trailer chassis, characterized in that: include: Frame; A plurality of pairs of Mecanum wheel systems are respectively installed at two ends of the frame, and each pair of the Mecanum wheel systems are relatively arranged on two sides of the frame; A plurality of pairs of unpowered traction wheel systems are respectively installed at both ends of the frame, and each pair of the unpowered traction wheel systems are relatively arranged on two sides of the frame; Wherein, each of the unpowered traction wheel systems comprises: Support mechanism; An unpowered traction wheel is installed on the supporting mechanism; The lifting and lowering adjustment mechanism is installed between the frame and the supporting mechanism and is used for controlling the lifting and lowering of the unpowered traction wheel.

2. The trailer chassis according to claim 1, characterized in that: The frame comprises: Two main longitudinal beams, arranged horizontally and spaced side by side; A plurality of flat cross beams are arranged horizontally and disposed between the two main longitudinal beams and are arranged at intervals along the axis direction of the main longitudinal beams; A plurality of groups of secondary longitudinal beams are arranged horizontally and are disposed one by one between two adjacent flat beams, and the secondary longitudinal beams in each group are arranged at intervals along the axis direction of the flat beam; Two groups of side cross beams are arranged horizontally and are respectively arranged on the outer sides of the two main longitudinal beams, and the side cross beams in each group are arranged at intervals along the axial direction of the main longitudinal beams.

3. The trailer chassis according to claim 2, characterized in that: The frame comprises: The two support frames are arranged horizontally and are respectively disposed at the middle of the outer sides of the two main longitudinal beams, and the two ends are respectively connected to the adjacent side cross beams to jointly form a placement area.

4. The trailer chassis according to claim 1, characterized in that: The Mecanum wheel system includes: Mecanum wheel; A platform plate, mounted on the side of the frame; An installation base plate is arranged above the platform plate; A rotary drive assembly is mounted on the mounting base plate and is drivingly connected to the Mecanum wheel; A vertical guide assembly installed between the platform plate and the installation base plate; A plurality of shock absorbing components are respectively installed at two ends of the installation base plate and connected to the platform plate.

5. The trailer chassis according to claim 4, characterized in that: The vertical guide assembly comprises: A T-shaped guide rail is arranged vertically and installed on the installation base plate; A guide rail slide seat is arranged vertically and installed on the top surface of the platform plate, and a T-shaped slide groove adapted to the T-shaped guide rail is opened on the side; A wear-resistant gasket is installed at the bottom of the T-shaped slide groove.

6. The trailer chassis according to claim 4, characterized in that: The shock absorbing assembly comprises: A fixing block, fixedly connected to the mounting base plate; A first nut, arranged above the fixing block; A first spring, constrained between the fixed block and the platform plate; The first bolt and the screw rod pass through the platform plate, the first spring and the fixing block in sequence from bottom to top and are then threadedly connected with the first nut.

7. The trailer chassis according to claim 1, characterized in that: The lifting and lowering adjustment mechanism comprises: A protective cover, mounted on the side of the frame and located above the supporting mechanism; A lifting cylinder is installed on the top surface of the support mechanism, and the piston rod is connected to the protective cover; A plurality of guide seats are installed on the top surface of the support mechanism and arranged around the lifting cylinder; A plurality of guide rods correspond to the guide seats one by one, are installed in the protective cover, and are vertically slidably matched with the corresponding guide seats.

8. The trailer chassis according to claim 1, characterized in that: The supporting mechanism comprises: roof; Two side panels are arranged oppositely on both sides of the bottom surface of the top panel; A support plate, provided at one end of the two side plates; The concave plate has two sides respectively fitted with the outer side surfaces of the two side plates and is hinged via a support shaft, and the inner side is rotatably connected to the unpowered traction wheel; A handbrake assembly, mounted on the concave plate and corresponding to the unpowered traction wheel; A connecting plate, arranged at the end of the concave plate and corresponding to the supporting plate; A second nut is arranged above the support plate; a second spring constrained between the second nut and the support plate; The second bolt, the screw rod passes through the connecting plate, the supporting plate and the second spring in sequence from bottom to top and is then threadedly connected with the second nut.

9. The trailer chassis according to claim 8, characterized in that: The support mechanism also includes: A convex shaft is arranged vertically and is provided on the bottom surface of the top plate; A rotating disk is rotatably sleeved on the convex shaft and disposed between the two side plates; A thrust ball bearing is coaxially arranged with the convex shaft and is provided between the top plate and the rotating disk.

10. The trailer chassis according to claim 8, characterized in that: The two side plates are both fixedly connected to the top plate.

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