A new type of tenon and mortise inserted top frame structure of a top frame

Abstract

The utility model discloses a novel mortise and tenon joint's protection roof frame top frame structure, including front crossbeam, middle crossbeam, rear crossbeam, a plurality of front grating and a plurality of rear grating, a plurality of front, rear grating's one end is equal interval connection in the front and rear side of middle crossbeam, front crossbeam is connected in a plurality of front grating's front end, the rear crossbeam is connected in a plurality of rear grating's rear end, the middle crossbeam with front, rear grating, front crossbeam with front grating and rear crossbeam with rear grating between all be through mortise and tenon joint structure positioning connection to welding connection. The utility model adopts mortise and tenon structure first and then welds after inserting and assembling between grating and crossbeam, compared with traditional edge welding, and the positioning is convenient, reduces frock use, and welding effect is good, increases the stability and firmness of protection roof frame.

Description

Technical Field

[0001] This utility model relates to the field of forklift overhead guard technology, and in particular to a novel mortise and tenon joint top frame structure for an overhead guard. Background Technology

[0002] Forklift overhead guards are installed above the forklift cab and are essential devices for protecting the driver's head and neck. Using a simple mechanical structure, they serve to block cargo and protect the driver. By welding together a specific number and spacing of grilles, they effectively prevent cargo from falling from above and causing injury when the forklift is loaded. In the event of a forklift rollover or a fall, the overhead guard provides head and neck protection for the driver, absorbing impact through a robust structural design and reducing the risk of injury. It also protects the driver from injuries caused by objects falling from above, such as heavy loads. A well-designed overhead guard also considers driver comfort, reducing head and neck fatigue and improving work efficiency and the overall operating experience.

[0003] The existing top frame of the top cover is mostly a grid plate and rectangular tube frame structure welded together. During the production of the top cover, tooling and manual labor are usually required to ensure the dimensions. The production input requires a certain mold cost, which greatly increases the welding time and cost. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a new type of mortise and tenon joint top frame structure for the roof support.

[0005] This utility model is achieved through the following technical solution: A novel mortise and tenon joint top frame structure for a roof support includes a front crossbeam, a middle crossbeam, a rear crossbeam, several front slats, and several rear slats. One end of each of the front and rear slats is connected at equal intervals to the front and rear sides of the middle crossbeam. The front crossbeam is connected to the front end of each of the front slats, and the rear crossbeam is connected to the rear end of each of the rear slats. The middle crossbeam is positioned and connected to the front and rear slats, the front crossbeam is connected to the front slats, and the rear crossbeam is connected to the rear slats through a mortise and tenon joint structure, and then welded together.

[0006] Multiple slots are provided at equal intervals on both sides of the middle crossbeam. Protrusions that fit the slots are provided at the rear end of the front grid plate and the front end of the rear grid plate. The protrusions are embedded in the slots to realize the plug-in assembly of the middle crossbeam with the front grid plate and the rear grid plate.

[0007] Arc-shaped slots are provided at the front end of the front grille and the rear end of the rear grille, respectively. Rectangular blocks extending outward are provided at the upper end of the arc-shaped slots. Several rectangular slots that fit the rectangular blocks are provided at equal intervals on the rear side of the front crossbeam and the front side of the rear crossbeam. The lower parts of the front grille and the rear grille are respectively embedded in the arc-shaped slots, and the rectangular blocks are correspondingly embedded in the rectangular slots, so as to realize the plug-in assembly of the front grille and the front crossbeam, and the rear grille and the rear crossbeam.

[0008] The top frame is adapted to the size specifications of the H2000 non-standard top support frame.

[0009] The gap between the mortise and tenon joints after they are joined is no more than 0.1mm.

[0010] The front, middle, and rear crossbeams are all made of rectangular tubing.

[0011] The number of top frame grid plates can be configured according to the customer's specific needs for forklift models and working conditions, and the spacing between each top frame grid plate can be adapted synchronously with the adjustment of the number of grid plates.

[0012] The protruding part at the end of the top frame grid plate is an integral structure with the grid plate, and the slots on both sides of the rectangular tube are structures formed directly on the wall of the rectangular tube.

[0013] The aforementioned plug-in connection has no obvious loose gaps, ensuring the stability of the connection between the top frame grid plate and the rectangular tube, and guaranteeing the quality of subsequent welding, resulting in a good overall effect.

[0014] The advantages of this utility model are: This utility model optimizes the connection method between the grid plate above the top frame and the rectangular tube, and the shape does not affect the overall use effect of the top protection frame. When using the top protection frame with the new tenon and mortise insertion process, the welding time and tooling investment can be effectively avoided in the production process of the top protection frame, which plays a role in reducing costs and increasing efficiency. This invention effectively reduces the time and cost of manual marking during production, greatly improves production efficiency, and can also meet the special configuration requirements of customers. This utility model utilizes the characteristics of mortise and tenon structure to optimize the original top frame structure of the roof guard, configuring it to suit the vehicle models and working conditions required by customers. During the production process, it can effectively reduce the construction period and lower costs; at the same time, it also provides good protection without affecting the normal function of the top frame.

[0015] This utility model first uses a mortise and tenon structure to assemble the grid plate and the crossbeam, and then welds them together. Compared with the traditional edge welding, this method is easier to position, reduces the use of tooling, and produces better welding results, thus increasing the stability and firmness of the top support frame. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the insertion structure between the middle crossbeam and the front and rear grid plates of this utility model; Figure 4 This is a schematic diagram of the insertion structure between the front crossbeam and the front grille. Figure 5 This is a schematic diagram of the front grille structure of this utility model. Detailed Implementation

[0018] like Figure 1-5 As shown, a novel mortise and tenon joint top frame structure for a roof support includes a front crossbeam 1, a middle crossbeam 2, a rear crossbeam 3, several front grid plates 4, and several rear grid plates 5. One end of each of the several front and rear grid plates 5 is connected at equal intervals to the front and rear sides of the middle crossbeam 2. The front crossbeam 1 is connected to the front end of each of the several front grid plates 4, and the rear crossbeam 3 is connected to the rear end of each of the several rear grid plates 5. The middle crossbeam 2 and the front and rear grid plates 5, the front crossbeam 1 and the front grid plates 4, and the rear crossbeam 3 and the rear grid plates 5 are all positioned and connected by mortise and tenon joints and then welded together.

[0019] Multiple slots 6 are provided at equal intervals on both sides of the middle crossbeam 2. Protrusions 7 that are adapted to the slots 6 are provided at the rear end of the front grid plate 4 and the front end of the rear grid plate 5. The protrusions 7 are embedded in the slots 6 to realize the insertion and assembly of the middle crossbeam 2 with the front grid plate 4 and the rear grid plate 5.

[0020] Arc-shaped slots 8 are provided at the front end of the front grille 4 and the rear end of the rear grille 5, respectively. Rectangular blocks 9 extending outward are provided at the upper end of the arc-shaped slots 8. Several rectangular slots 10 adapted to the rectangular blocks 9 are provided at equal intervals on the rear side of the front crossbeam 1 and the front side of the rear crossbeam 3. The lower parts of the front grille 4 and the rear grille 5 are respectively embedded in the arc-shaped slots 8, and the rectangular blocks 9 are correspondingly embedded in the rectangular slots 10, so as to realize the insertion and assembly of the front grille 4 and the front crossbeam 1, and the rear grille 5 and the rear crossbeam 3.

[0021] The top frame is adapted to the size specifications of the H2000 non-standard top support frame.

[0022] The gap between the mortise and tenon joints after they are joined is no more than 0.1mm.

[0023] The front crossbeam 1, middle crossbeam 2, and rear crossbeam 3 are all made of rectangular tubing.

[0024] The top frame structure of this utility model uses a composite connection method of "mortise and tenon joint positioning + welding fixation" combined with modular component design to achieve precise assembly and stable connection of the top frame of the top frame, while adapting to specific specification requirements.

[0025] This utility model revolves around achieving precise positioning through mortise and tenon joints and then achieving permanent and stable connection through welding, specifically through three core steps: component adaptation, layered insertion positioning, and welding reinforcement. The core components of the top frame (front crossbeam 1, middle crossbeam 2, rear crossbeam 3, front slat 4, and rear slat 5) are all standardized prefabricated parts, among which: The beams (front, middle, and rear) use rectangular tubes to ensure structural rigidity while providing a stable "base carrier" for the mortise and tenon structure; The grating type (front and rear) is a "bridge component" connecting the crossbeams. The two ends are prefabricated with mortise and tenon structures (protrusion 7, arc-shaped groove 8, and rectangular block 9) that are adapted to the corresponding crossbeams to ensure consistency during mass production.

[0026] This utility model achieves precise positioning of all components through the mortise and tenon structure of the crossbeam grid, avoiding assembly deviations: The middle crossbeam 2 has pre-set equally spaced slots on both sides, and the rear end of the front grid plate 4 and the front end of the rear grid plate 5 have pre-set protrusions 7 that fit the slots. During assembly, the protrusions 7 are inserted into the slots to directly achieve: ① vertical positioning of the front / rear grid plates 5 and the middle crossbeam 2 (avoiding grid plate tilting); ② equal spacing of all grid plates, without the need for additional spacing measurement, and the gap after insertion is ≤0.1mm, ensuring that the components fit together without loosening.

[0027] The front end of the front grille 4 and the rear end of the rear grille 5 are pre-set with arc-shaped slots 8 and rectangular blocks 9: the arc-shaped slots 8 wrap around the lower side of the crossbeam to achieve vertical positioning of the grille and the crossbeam and prevent the grille from shifting vertically; ② The rectangular blocks 9 are embedded in the rectangular slots 10 on the side of the crossbeam to achieve horizontal positioning of the grille and the crossbeam and prevent the grille from swaying horizontally; the two sets of structures work together to finally fix the front crossbeam 1 and the rear crossbeam 3 to the ends of the front / rear grille 5 respectively, forming a complete closed loop frame.

[0028] After the mortise and tenon joints are completed, welding is performed on all mortise and tenon joints. Since the mortise and tenon joints have achieved precise fitting of the components (gap ≤ 0.1mm), there is no need to adjust the position of the components during welding, and the weld can evenly fill the gaps, ultimately forming a "stress-free, high-rigidity" overall top frame, avoiding the problems of uneven welds and structural deformation caused by positioning deviations in traditional pure welded structures.

[0029] This utility model achieves "pre-positioning" through mortise and tenon structure, with a gap of ≤0.1mm after insertion. The fit of the components far exceeds that of traditional assembly methods. Subsequent welding only requires reinforcement and does not require correction. The dimensional accuracy of the final frame can be stably controlled within the design tolerance, avoiding difficulties in the installation of the top protection frame or failure of protection due to insufficient accuracy.

[0030] All components of this utility model are standardized prefabricated parts. The mortise and tenon structure can be processed by automated processes such as stamping and cutting, avoiding the labor costs of traditional manual grinding and adjustment; the improved assembly efficiency also indirectly reduces labor costs.

[0031] This utility model solves the problem of "precise positioning" with mortise and tenon structure and the problem of "stable connection" with welding. The combination of the two not only retains the high-precision assembly advantages of mortise and tenon, but also makes up for the lack of rigidity of pure mortise and tenon structure (without welding). At the same time, through standardized design and non-standard adaptation, it takes into account both mass production efficiency and customization needs. It is a "high-precision, high-efficiency, high-rigidity, and low-cost" top protection frame solution.

Claims

1. A novel mortise and tenon joint roof support frame structure, characterized in that, It includes a front crossbeam, a middle crossbeam, a rear crossbeam, several front grilles, and several rear grilles. One end of each of the several front and rear grilles is connected at equal intervals to the front and rear sides of the middle crossbeam. The front crossbeam is connected to the front end of each of the several front grilles, and the rear crossbeam is connected to the rear end of each of the several rear grilles. The middle crossbeam is positioned and connected to the front and rear grilles, the front crossbeam is connected to the front grilles, and the rear crossbeam is connected to the rear grilles through a mortise and tenon joint structure and then welded together.

2. The novel mortise and tenon joint roof support frame structure according to claim 1, characterized in that, Multiple slots are provided at equal intervals on both sides of the middle crossbeam. Protrusions that fit the slots are provided at the rear end of the front grid plate and the front end of the rear grid plate. The protrusions are embedded in the slots to realize the plug-in assembly of the middle crossbeam with the front grid plate and the rear grid plate.

3. The novel mortise and tenon joint roof support frame structure according to claim 1, characterized in that, Arc-shaped slots are provided at the front end of the front grille and the rear end of the rear grille, respectively. Rectangular blocks extending outward are provided at the upper end of the arc-shaped slots. Several rectangular slots that fit the rectangular blocks are provided at equal intervals on the rear side of the front crossbeam and the front side of the rear crossbeam. The lower parts of the front grille and the rear grille are respectively embedded in the arc-shaped slots, and the rectangular blocks are correspondingly embedded in the rectangular slots, so as to realize the plug-in assembly of the front grille and the front crossbeam, and the rear grille and the rear crossbeam.

4. The novel mortise and tenon joint roof support frame structure according to claim 1, characterized in that, The top frame is adapted to the size specifications of the H2000 non-standard top support frame.

5. The novel mortise and tenon joint roof support frame structure according to claim 1, characterized in that, The gap between the mortise and tenon joints after they are joined is no more than 0.1mm.

6. The novel mortise and tenon joint roof support frame structure according to claim 1, characterized in that, The front, middle, and rear crossbeams are all made of rectangular tubing.

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