A bottom plate and chassis connection mechanism for unmanned logistics vehicles

Abstract

This utility model relates to the field of unmanned logistics vehicle technology, specifically a chassis-floor connection mechanism for an unmanned logistics vehicle. It includes a chassis frame and a floor assembly. The chassis frame includes symmetrical longitudinal chassis beams. The floor assembly includes an interconnected floor frame and a floor plate. The bottom surface of the floor frame has a floor plate bracket corresponding to the shape of the chassis frame. The floor plate bracket is fastened to the two longitudinal chassis beams by several locking components. The surface of the floor plate is used to bear materials. This mechanism solves the problem of loosening and displacement through double fixing, improves assembly convenience through spacing, and simultaneously optimizes shock absorption and load-bearing capacity, thereby improving the transportation reliability and maintenance efficiency of the unmanned logistics vehicle.

Description

Technical Field

[0001] This utility model relates to the field of unmanned logistics vehicle technology, and in particular to a bottom plate and chassis connection mechanism for unmanned logistics vehicles. Background Technology

[0002] The chassis of an unmanned logistics vehicle is a core component that carries transported materials, and the stability of its connection with the chassis directly determines the safety of material transportation and the reliability of vehicle operation. Existing connection mechanisms between the chassis and chassis of unmanned logistics vehicles have two major shortcomings: First, the connection structure is poorly designed, often using simple bolts for direct fixing without specific longitudinal locking and horizontal limiting structures. Bumps and vibrations during vehicle operation can easily cause longitudinal loosening or horizontal displacement of the chassis, severely affecting the safety of material carrying. Second, assembly and maintenance are inconvenient. The bolt installation positions in traditional connection structures are limited, the operating space is narrow, and precise alignment is required for fixing. Disassembly also requires the removal of multiple related components, making it completely unsuitable for the rapid maintenance needs following frequent loading and unloading of materials in unmanned logistics vehicles.

[0003] In addition, existing connection mechanisms generally suffer from problems such as direct vibration transmission and uneven load distribution on the base plate, which further restrict the transportation reliability and operational efficiency of unmanned logistics vehicles.

[0004] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to overcome the problems of the prior art and provide a bottom plate and chassis connection mechanism for unmanned logistics vehicles. This mechanism solves the technical problems of easy longitudinal loosening and horizontal displacement of the connection between the bottom plate and chassis of unmanned logistics vehicles, as well as cumbersome assembly and maintenance operations that cannot be adapted to high-frequency maintenance.

[0006] The above objectives are achieved through the following technical solutions: A chassis-floor connection mechanism for an unmanned logistics vehicle includes a chassis frame and a chassis assembly. The chassis frame includes left and right symmetrical chassis longitudinal beams and a front chassis crossbeam and a rear chassis crossbeam arranged parallel between the two chassis longitudinal beams. The chassis assembly includes a chassis frame and a chassis plate connected to each other. The bottom surface of the chassis frame is provided with a chassis plate bracket corresponding to the shape of the chassis frame. The chassis plate bracket is fastened to the two chassis longitudinal beams by a number of locking components. The surface of the chassis plate is used to carry materials.

[0007] Furthermore, the base plate frame includes a rectangular frame consisting of two base plate crossbeams and two base plate longitudinal beams, and the rectangular frame is connected to the base plate to form a base plate groove with the opening facing the direction.

[0008] Furthermore, the groove of the base plate is provided with several intermediate crossbeams of the base plate that are parallel to the crossbeams of the base plate, and each of the intermediate crossbeams of the base plate is connected to two longitudinal beams of the base plate at both ends.

[0009] Furthermore, the upper surface of the middle crossbeam of the base plate is attached to and supported by the bottom surface of the base plate, or is fixedly connected by welding.

[0010] Furthermore, the bottom surface of the intermediate crossbeam of the base plate is fixedly connected to the base plate support, thereby forming a gap between the base plate support and the bottom surface of the base plate.

[0011] Furthermore, the base plate support includes support longitudinal beams that match the shape of the two chassis longitudinal beams, and the two ends of the two support longitudinal beams are respectively connected to the two base plate crossbeams.

[0012] Furthermore, the locking assembly includes a U-shaped bolt longitudinally sleeved on the longitudinal beam of the bracket and the longitudinal beam of the chassis, a locking connecting plate sleeved with the U-shaped bolt to form a closed loop, and two locking nuts capable of tightening the U-shaped bolt.

[0013] Furthermore, after the locking nut is tightened, the locking connecting plate is in close contact with the top surface of the longitudinal beam of the bracket.

[0014] Furthermore, a leather pad is provided between the longitudinal beam of the support and the longitudinal beam of the chassis.

[0015] Furthermore, the outer sides of the support longitudinal beam and the chassis longitudinal beam are provided with several diagonal bracing plates.

[0016] The present invention provides a bottom plate and chassis connection mechanism for unmanned logistics vehicles. The bottom plate and chassis are stably connected through the dual fixation of the longitudinal locking structure and the inclined plate. The spaced design makes assembly and maintenance convenient and efficient, takes into account both shock absorption and load-bearing optimization, ensures the safety of material transportation and improves operational efficiency. Attached Figure Description

[0017] Figure 1 This is a first-view structural schematic diagram of the bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to the present invention. Figure 2 This is a second-view structural schematic diagram of the bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to the present invention; Figure 3 This is a third-view structural diagram of the bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to the present invention. Figure 4 This is a schematic diagram of the connection mechanism between the base plate and the chassis of the unmanned logistics vehicle described in this utility model before assembly; Figure 5This is a schematic diagram of the assembly of the base plate component in the base plate and chassis connection mechanism for an unmanned logistics vehicle according to the present invention.

[0018] Illustration markings: 1-Chassis frame, 101-Chassis longitudinal beam, 102-Front-end chassis crossbeam, 103-Rear-end chassis crossbeam; 2-Base plate assembly, 201-Base plate frame, 202-Base plate, 203-Base plate support, 204-Base plate crossbeam, 205-Base plate longitudinal beam, 206-Base plate groove, 207-Base plate intermediate crossbeam, 208-Interval space, 209-Support longitudinal beam; 3-Locking assembly, 301-U-bolt, 302-Locking connecting plate, 303-Locking nut; 4-Leather pad; 5-Diagonal bracing plate. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] like Figures 1-3 As shown, this solution provides a bottom plate and chassis connection mechanism for unmanned logistics vehicles. The mechanism consists of a chassis frame 1, a bottom plate assembly 2, a locking assembly 3, a leather pad 4, and a tie plate 5. The components work together to achieve a stable, shock-absorbing, and convenient connection between the bottom plate and the chassis, while optimizing the load-bearing performance of the bottom plate.

[0021] like Figure 2 and Figure 4 As shown, in this embodiment, the chassis frame 1 serves as the load-bearing foundation for the entire connecting mechanism. It is made of high-strength rigid materials, such as high-strength steel, to ensure sufficient structural strength to withstand impacts and vibrations during driving. It includes two symmetrically arranged chassis longitudinal beams 101, extending along the vehicle's driving direction and serving as the longitudinal load-bearing core. A front chassis crossbeam 102 and a rear chassis crossbeam 103 are arranged parallel to each other between the two longitudinal beams 101. The two ends of the crossbeams are respectively welded or bolted to the two chassis longitudinal beams 101, forming a rigid frame structure of "two longitudinal and two transverse" beams. This structure effectively disperses stress during vehicle operation, ensuring the overall stability of the chassis frame 1 and providing a reliable support foundation for the installation of the floor assembly 2.

[0022] like Figures 2-5As shown, the base plate assembly 2 is the core component for material bearing and connection transition, including the interconnected base plate frame 201, base plate 202 and base plate support 203. The whole assembly is made of rigid material that is compatible with the chassis frame 1, taking into account both load-bearing strength and connection stability.

[0023] Specifically, the base plate frame 201 is formed by two base plate crossbeams 204 and two base plate longitudinal beams 205 to form a rectangular frame. After the rectangular frame is fixedly connected to the base plate 202 by welding or bolts, it forms a base plate groove 206 with the opening facing. The base plate groove 206 provides installation space for the internal support structure and enhances the deformation resistance of the base plate frame 201. Several intermediate crossbeams 207 parallel to the crossbeams 204 are provided in the groove 206 of the base plate. The two ends of each intermediate crossbeam 207 are fixed to two longitudinal beams 205 of the base plate by welding, forming a multi-point support structure. The upper surface of each intermediate crossbeam 207 is in close contact with the bottom surface of the base plate 202 and can be further fixed by welding, so as to achieve uniform support for the base plate 202, effectively distribute the weight of the material, avoid deformation of the base plate 202 due to excessive local stress, and solve the problem of uneven load bearing of traditional base plates.

[0024] The base plate bracket 203 is set on the bottom surface of the base plate frame 201 and is integrally formed or welded to the base plate frame 201. It includes two support longitudinal beams 209 that are precisely matched with the shape of the two chassis longitudinal beams 101. The two ends of the two support longitudinal beams 209 are welded and fixed to the two base plate cross beams 204 respectively, ensuring that the base plate bracket 203 is firmly connected to the base plate frame 201. The bottom surface of the cross beam 207 in the middle of each base plate is welded and fixed to the top surface of the support longitudinal beams 209, so that a gap space 208 is formed between the base plate bracket 203 and the bottom surface of the base plate 202. This gap space 208 provides sufficient operating space for the installation, tightening and disassembly of the locking component 3, completely solving the problem of narrow operating space in traditional connection structures.

[0025] like Figures 2-4As shown, the locking assembly 3 is used to achieve a longitudinal and firm connection between the base plate bracket 203 and the chassis longitudinal beam 101. It is designed to address the shortcomings of traditional simple bolt fixing and includes a U-bolt 301, a locking connecting plate 302 and two locking nuts 303. The opening size of the U-bolt 301 is adapted to the combined thickness of the support longitudinal beam 209 and the chassis longitudinal beam 101, allowing the support longitudinal beam 209 and the chassis longitudinal beam 101 to be longitudinally fitted from below. The locking connecting plate 302 is a long strip of plate that matches the U-bolt 301, with mounting holes that match both ends of the U-bolt 301, allowing it to be fitted onto both ends of the U-bolt 301 to form a closed-loop structure. During assembly, the U-bolt 301 is fitted onto the support longitudinal beam 209 and the chassis longitudinal beam 101, the locking connecting plate 302 is passed through both ends of the U-bolt 301 and pressed tightly against the top surface of the support longitudinal beam 209, and then two locking nuts 303 are tightened onto the threaded ends of the U-bolt 301. The preload of the locking nuts 303 ensures a tight fit between the support longitudinal beam 209 and the chassis longitudinal beam 101, preventing longitudinal loosening.

[0026] In this embodiment, the pad 4 is made of elastic rubber and its size is adapted to the contact area of ​​the support longitudinal beam 209 and the chassis longitudinal beam 101. It is set between the support longitudinal beam 209 and the chassis longitudinal beam 101 and can absorb the vibration energy transmitted by the chassis frame 1 through its own elastic deformation. It effectively blocks the vibration from being transmitted to the base plate assembly 2, which not only protects the materials it carries, especially fragile materials, but also reduces the vibration fatigue loss of the locking assembly 3 and various connecting parts, improves the long-term reliability of the connection mechanism, and solves the problem of direct vibration transmission in traditional connection structures.

[0027] like Figures 2-4 As shown, as an optimization of this embodiment, a diagonal brace 5 is also provided. The diagonal brace 5 is made of rigid plate and has a rectangular, triangular, or trapezoidal structure. It is set on the outer side of the support longitudinal beam 209 and the chassis longitudinal beam 101, and the number is reasonably configured according to the vehicle length and stability requirements. One side of the diagonal brace 5 is welded or screwed to the outer wall of the support longitudinal beam 209, and the other side is welded or screwed to the outer wall of the chassis longitudinal beam 101. The triangular stabilizing structure restricts the horizontal displacement between the support longitudinal beam 209 and the chassis longitudinal beam 101, preventing relative displacement between the two when the unmanned logistics vehicle turns or is subjected to lateral force. It works with the locking component 3 to form a double fixation in the longitudinal and horizontal directions, completely solving the problem of horizontal displacement in traditional structures and further improving the overall stability of the connection mechanism.

[0028] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bottom plate and chassis connection mechanism for an unmanned logistics vehicle, characterized in that, The system includes a chassis frame (1) and a base plate assembly (2). The chassis frame (1) includes chassis longitudinal beams (101) that are symmetrical on the left and right. The base plate assembly (2) includes a base plate frame (201) and a base plate (202) that are connected to each other. The bottom surface of the base plate frame (201) is provided with a base plate bracket (203) that corresponds to the shape of the chassis frame (1). The base plate bracket (203) is fastened to the two chassis longitudinal beams (101) by a number of locking components (3). The surface of the base plate (202) is used to carry materials.

2. The bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to claim 1, characterized in that, The base plate frame (201) includes a rectangular frame consisting of two base plate crossbeams (204) and two base plate longitudinal beams (205). The rectangular frame is connected to the base plate (202) to form a base plate groove (206) with the opening facing the bottom.

3. The bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to claim 2, characterized in that, The groove (206) of the bottom plate is provided with several intermediate crossbeams (207) of the bottom plate parallel to the crossbeams (204) of the bottom plate, and each of the intermediate crossbeams (207) of the bottom plate is connected to two longitudinal beams (205) of the bottom plate at both ends.

4. The bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to claim 3, characterized in that, The upper surface of the middle crossbeam (207) of the base plate is in contact with and supports the bottom surface of the base plate (202).

5. The bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to claim 3, characterized in that, The bottom surface of the middle crossbeam (207) of the base plate is fixedly connected to the base plate support (203), so that a space (208) is formed between the base plate support (203) and the bottom surface of the base plate (202).

6. The bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to claim 2, characterized in that, The base plate support (203) includes a support longitudinal beam (209) that matches the shape of the two chassis longitudinal beams (101), and the two ends of the two support longitudinal beams (209) are respectively connected to the two base plate cross beams (204).

7. The bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to claim 6, characterized in that, The locking assembly (3) includes a U-bolt (301) that is longitudinally sleeved on the support longitudinal beam (209) and the chassis longitudinal beam (101), a locking connecting plate (302) that is sleeved on the U-bolt (301) to form a closed loop, and two locking nuts (303) that can tighten the U-bolt (301).

8. The bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to claim 7, characterized in that, After the locking nut (303) is tightened, the locking connecting plate (302) is in close contact with the top surface of the bracket longitudinal beam (209).

9. A bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to claim 6, characterized in that, A pad (4) is provided between the support longitudinal beam (209) and the chassis longitudinal beam (101).

10. A bottom plate and chassis connection mechanism for an unmanned logistics vehicle according to claim 6, characterized in that, The outer sides of the support longitudinal beam (209) and the chassis longitudinal beam (101) are provided with several diagonal bracing plates (5).

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