Forklift anti-falling roof frame with multi-stage buffer structure

Abstract

The application relates to the technical field of roof protection frames, and discloses a forklift anti-falling roof protection frame with a multistage buffer structure, which comprises a vehicle body, four connecting blocks are fixedly connected to the outer surface of the vehicle body, the upper surfaces of the connecting blocks are all fixedly connected with stand columns, a fixing frame is arranged above the vehicle body, and the bottom surface of the fixing frame is fixedly connected with the four stand columns. The forklift anti-falling roof protection frame with the multistage buffer structure is provided with a first-stage hydraulic buffer, a second-stage honeycomb aluminum energy absorption box and a third-stage elastic damping layer, so that in the use process of the device, part of impact force can be absorbed through the compression deformation of the third-stage elastic damping layer, then the remaining kinetic energy is gradually conducted to the honeycomb aluminum energy absorption box, half of the energy is absorbed through the plastic deformation of the hole wall, the remaining energy is finally dissipated by the plunger cylinder through the oil throttling effect, and therefore, the device can greatly reduce the energy conducted to the driver when the roof protection frame is impacted.

Description

Technical Field

[0001] This application relates to the field of overhead guard technology, specifically a forklift anti-fall overhead guard with a multi-level buffer structure. Background Technology

[0002] Currently, falling objects from heights are one of the main safety hazards threatening forklift operators. Traditional overhead guards are mostly rigid structures that achieve physical isolation through high-strength metal frames, but they lack effective energy absorption mechanisms. In recent years, with the rapid development of the logistics industry and the increased intensity of forklift operations, falling object impact accidents have become more frequent, highlighting the industry's growing demand for the cushioning performance of overhead guards. According to statistics, 23.7% of forklift accidents in China in 2022 were related to falling object impacts, and in 67% of these accidents, the overhead guards did not suffer structural damage but still resulted in driver injuries, indicating that existing technologies have significant deficiencies in the conduction and dispersion of impact energy.

[0003] An existing patent (publication number: CN220684576U) discloses a forklift overhead guard, relating to the field of forklift overhead guards. This upright frame has a top plate at the top of two sets of uprights, and protective mechanisms are installed at both sets of uprights for protecting the sides of the forklift. This forklift overhead guard features a door on the side of the uprights that forms the guard. The door is rotatably mounted thereon, and through fixing blocks installed on the side of the uprights and connecting blocks on the side of the door, the door is stably closed by a connecting rope at the fixing blocks, thus protecting the sides of overhead guards that are traditionally directly exposed.

[0004] The aforementioned device protects the sides of the overhead guard, which are typically exposed, by setting up a barrier and ensuring its stable closure. Although the structure is simple and durable, the impact force can be directly transmitted to the vehicle frame during use, causing spinal injuries to the driver. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a forklift fall protection frame with a multi-level buffer structure, which has the advantages of being able to adapt to impact conditions caused by falling objects of different weights, and solves the problem of injury to drivers caused by existing structures during impact.

[0006] To achieve the above objectives, this application provides the following technical solution: a forklift anti-fall top guard with a multi-level buffer structure, comprising a vehicle body, four connecting blocks fixedly connected to the outer surface of the vehicle body, a column fixedly connected to the upper surface of each connecting block, a fixing frame provided above the vehicle body, the bottom surface of the fixing frame being fixedly connected to the four columns, two connecting plates fixedly connected to the bottom surface of the fixing frame, a plunger cylinder fixedly installed on the upper surface of each connecting plate, and a fixing block fixedly connected to the output end of each plunger cylinder.

[0007] With the above scheme, the vehicle body serves as the basic carrier of the entire device, and four connecting blocks are fixedly connected to its outer surface. The positions of these four connecting blocks are carefully designed and are usually evenly distributed in suitable positions on the outer surface of the vehicle body to ensure the stability and balance of the subsequent connection structure. The four columns are welded to the top grid-shaped fixing frame to form a support frame. Two sets of plunger cylinders are provided and arranged symmetrically in pairs. The cylinder bodies are fixed to the connecting plate on the inner side of the crossbeam by flange bolts, thus forming a first-stage hydraulic buffer.

[0008] Furthermore, an elastic damping layer is provided above the fixing frame, and a honeycomb aluminum energy-absorbing box is fixedly installed on the bottom surface of the elastic damping layer.

[0009] With the above scheme, when a falling object impacts, the three-stage elastic damping layer first undergoes compression deformation to absorb 10% to 15% of the energy; the remaining kinetic energy is transferred to the honeycomb aluminum energy-absorbing box, where 40% to 50% of the energy is absorbed through plastic deformation of the hole wall; finally, the hydraulic buffer dissipates the remaining energy through the throttling effect of the oil, reducing the peak impact force by more than % throughout the process.

[0010] Furthermore, the bottom surface of the honeycomb aluminum energy-absorbing box is fixedly connected to two fixing slots, and the inner wall of each fixing slot is inserted into the corresponding fixing block.

[0011] Through the above scheme, the honeycomb aluminum energy-absorbing box is connected to the fixing block at the end of the hydraulic buffer piston rod through the groove block, thereby forming a dovetail groove structure. With the unique groove and tenon joint cross-section design between the fixing block and the groove block, which resembles the tail of a swallow, it shows many advantages in practical applications.

[0012] Furthermore, the upper surface of the fixing frame is provided with several sliding grooves, and the interior of the fixing frame is provided with several slots, with the inner wall of each sliding groove communicating with the corresponding slot.

[0013] With the above solution, the mounting bracket, as a key component connecting the vehicle body and the piston cylinder, forms a complete positioning and connection system with the sliding groove on its upper surface and the slot inside.

[0014] Furthermore, a number of connecting rods are fixedly connected to the bottom surface of the elastic damping layer, and the outer surface of each connecting rod is slidably connected to the corresponding groove.

[0015] The above scheme uses a polyurethane / silicone composite foam as the elastic damping layer, which is covered on the outer surface of the honeycomb aluminum energy-absorbing box with an adhesive. It has good elasticity and damping performance. The connecting rod is generally a columnar structure, and its outer surface shape is adapted to the sliding groove to achieve a smooth sliding connection. This provides a certain amount of movement space for the top support frame during impact.

[0016] Furthermore, each of the card slots has a card plate slidably connected to its inner wall, and the upper surface of each card plate is fixedly installed with a corresponding connecting rod.

[0017] The above scheme, through the sliding connection structure formed by the elastic damping layer and the chute via the connecting rod, is the key design for realizing the functions of buffering and shock absorption, dynamic adjustment and modularization in the whole device. This structure improves the stability and reliability of the equipment and increases the service life of the top support frame.

[0018] Furthermore, two pedal brackets are provided on both sides of the vehicle body, and the sides of the two pedal brackets that are close to each other are fixedly connected to the vehicle body.

[0019] With the above solution, the two pedal frames are symmetrically set with the central axis of the vehicle body as the reference. This layout can ensure that the force is evenly distributed on both sides of the vehicle body, avoid structural deformation or center of gravity shift caused by unilateral load-bearing, and the symmetrical pedal frames can facilitate operators to get on and off from either side, improving usage efficiency.

[0020] Furthermore, the outer side of the vehicle body is provided with two handrails, and the bottom end of each handrail is fixedly connected to the corresponding pedal frame.

[0021] With the above solution, the handrail serves as a stable support point for people getting on and off the vehicle. It provides a point of leverage by gripping, preventing falls due to vehicle shaking or slippery ground. Furthermore, it provides safety protection for people standing on the footboard during vehicle movement or operation, preventing them from losing balance due to inertia or bumps.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This forklift fall arrestor with a multi-stage buffer structure incorporates a primary hydraulic damper, a secondary honeycomb aluminum energy-absorbing box, and a tertiary elastic damping layer. During operation, the device first absorbs some of the impact force through the compression deformation of the tertiary elastic damping layer. The remaining kinetic energy is then gradually transferred to the honeycomb aluminum energy-absorbing box, where half of the energy is absorbed through plastic deformation of the hole walls. The remaining energy is ultimately dissipated by the plunger cylinder through the hydraulic throttling effect. This significantly reduces the energy transmitted to the driver when the fall arrestor is impacted. Attached Figure Description

[0024] Figure 1 This is a diagram illustrating the overall structure of this application;

[0025] Figure 2 This is a structural diagram of the columns in this application;

[0026] Figure 3 This is a structural diagram of the fixing frame in this application;

[0027] Figure 4 This is a structural diagram of the fixed block in this application;

[0028] Figure 5 This is a structural diagram of the plunger cylinder of this application.

[0029] In the picture:

[0030] 1. Vehicle body; 2. Pedal frame; 3. Handrail; 4. Connecting block; 5. Column; 6. Fixing frame; 7. Connecting plate; 8. Plunger cylinder; 9. Fixing block; 10. Groove block; 11. Honeycomb aluminum energy-absorbing box; 12. Elastic damping layer; 13. Connecting rod; 14. Card plate; 15. Slide groove; 16. Card slot. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 , Figure 2 and Figure 3This embodiment of a forklift anti-fall top guard with a multi-level buffer structure includes a vehicle body 1. Four connecting blocks 4 are fixedly connected to the outer surface of the vehicle body 1. A column 5 is fixedly connected to the upper surface of each connecting block 4. A fixing frame 6 is provided above the vehicle body 1. The bottom surface of the fixing frame 6 is fixedly connected to the four columns 5. Two connecting plates 7 are fixedly connected to the bottom surface of the fixing frame 6. A plunger cylinder 8 is fixedly installed on the upper surface of each connecting plate 7. A fixing block 9 is fixedly connected to the output end of each plunger cylinder 8.

[0033] Please see Figure 3 , Figure 4 and Figure 5 An elastic damping layer 12 is provided above the fixed frame 6. A honeycomb aluminum energy-absorbing box 11 is fixedly installed on the bottom surface of the elastic damping layer 12. When a falling object impacts, the three-stage elastic damping layer 12 first undergoes compression deformation to absorb 10% to 15% of the energy. The remaining kinetic energy is conducted to the honeycomb aluminum energy-absorbing box 11, which absorbs 40% to 50% of the energy through plastic deformation of the hole wall. Finally, the hydraulic buffer dissipates the remaining energy through the throttling effect of the oil. The peak impact force is reduced by more than 62% throughout the process.

[0034] Please see Figure 4 , Figure 5 The bottom surface of the honeycomb aluminum energy-absorbing box 11 is fixedly connected to two fixing slots 10. The inner wall of each fixing slot 10 is inserted into the corresponding fixing block 9. The honeycomb aluminum energy-absorbing box 11 is connected to the fixing block 9 at the end of the hydraulic buffer piston rod through the slots 10, thus forming a dovetail groove structure. With the unique groove and tenon joint design between the fixing block 9 and the slot 10, which resembles the tail of a swallow, it shows many advantages in practical applications.

[0035] Please see Figure 4 , Figure 5 The upper surface of the fixing frame 6 is provided with several sliding grooves 15, and the interior of the fixing frame 6 is provided with several slots 16. The inner wall of each sliding groove 15 is connected to the corresponding slot 16. As a key component connecting the vehicle body 1 and the plunger cylinder 8, the fixing frame 6 forms a complete positioning and connection system with the sliding grooves 15 on its upper surface and the slots 16 inside.

[0036] Please see Figure 4 and Figure 5 Several connecting rods 13 are fixedly connected to the bottom surface of the elastic damping layer 12. The outer surface of each connecting rod 13 is slidably connected to the corresponding groove 15. The elastic damping layer 12 is a polyurethane / silicone composite foam, which is covered on the outer surface of the honeycomb aluminum energy-absorbing box 11 by an adhesive. It has good elasticity and damping performance. The connecting rods 13 are generally columnar structures, and their outer surface shape is adapted to the groove 15 to achieve smooth sliding connection. This provides a certain amount of movement space for the top protection frame during impact.

[0037] Please see Figure 4 , Figure 5 Each slot 16 has a sliding plate 14 slidably connected to its inner wall. The upper surface of each plate 14 is fixedly installed with the corresponding connecting rod 13. The sliding connection structure formed by the elastic damping layer 12 and the slide groove 15 through the connecting rod 13 is the key design for realizing the functions of buffering and shock absorption, dynamic adjustment and modularization in the whole device. This structure improves the stability and reliability of the equipment and increases the service life of the top support frame.

[0038] Please see Figure 1 The vehicle body 1 has two pedal frames 2 on both sides. The two pedal frames 2 are fixedly connected to the vehicle body 1 on the side closest to each other. The two pedal frames 2 are symmetrically arranged with the central axis of the vehicle body 1 as the reference. This layout can ensure that the force on both sides of the vehicle body 1 is even, avoid structural deformation or center of gravity shift caused by unilateral load. In addition, the symmetrical pedal frames 2 can facilitate the operator to get on and off from either side, improving the efficiency of use.

[0039] Please see Figure 1 Two handrails 3 are provided on the outside of the vehicle body 1. The bottom end of each handrail 3 is fixedly connected to the corresponding footboard frame 2. The handrail 3 serves as a stable support point for people to get on and off the vehicle body 1. It provides a point of force by gripping, preventing falls due to shaking of the vehicle body 1 or slippery ground. In addition, it provides safety protection for people standing on the footboard frame 2 during the movement or operation of the vehicle body 1, avoiding loss of balance due to inertia or bumps.

[0040] This embodiment of a forklift fall arrestor with a multi-stage buffer structure, by setting a first-stage hydraulic buffer, a second-stage honeycomb aluminum energy-absorbing box 11, and a third-stage elastic damping layer 12, enables the device to first absorb part of the impact force through the compression deformation of the third-stage elastic damping layer 12 during use. Then, the remaining kinetic energy is gradually transmitted to the honeycomb aluminum energy-absorbing box 11, where half of the energy is absorbed through the plastic deformation of the hole wall. The remaining energy is finally dissipated by the plunger cylinder 8 through the oil throttling effect, thereby achieving the effect of greatly reducing the energy transmitted to the driver when the fall arrestor is impacted.

[0041] The working principle of the above embodiments is as follows:

[0042] First, the column 5 is welded and installed to the grid-shaped fixing frame 6. Then, the plunger cylinder 8 is fixed to the connecting plate 7 with flange bolts. The honeycomb aluminum energy-absorbing box 11 is installed to the plunger cylinder 8 through the dovetail groove structure between the fixing block 9 and the groove block 10. Finally, the honeycomb aluminum energy-absorbing box 11 is connected to the three-stage elastic damping layer 12 with adhesive. During this process, the connecting rod 13 is inserted into the corresponding slide groove 15 and the connecting rod 13 is connected to the corresponding clamping plate 14 with bolts. This can position the elastic damping layer 12. When the falling object impacts, the three-stage elastic layer first undergoes compression deformation to absorb 10% to 15% of the energy. The remaining kinetic energy is conducted to the honeycomb aluminum box, and 40% to 50% of the energy is absorbed through the plastic deformation of the hole wall. Finally, the hydraulic buffer dissipates the remaining energy through the oil throttling effect. The peak impact force is reduced by more than 62% throughout the process. During this process, the connecting rod 13 will slide vertically along the corresponding slide groove 15, and the clamping plate 14 will limit the elastic damping layer 12.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0044] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A forklift fall arrestor with a multi-stage buffer structure, comprising a vehicle body (1), characterized in that: Four connecting blocks (4) are fixedly connected to the outer surface of the vehicle body (1). Each connecting block (4) has a column (5) fixedly connected to its upper surface. A fixing frame (6) is provided above the vehicle body (1). The bottom surface of the fixing frame (6) is fixedly connected to the four columns (5). Two connecting plates (7) are fixedly connected to the bottom surface of the fixing frame (6). A plunger cylinder (8) is fixedly installed on the upper surface of each connecting plate (7). A fixing block (9) is fixedly connected to the output end of each plunger cylinder (8).

2. The forklift anti-fall protection frame with a multi-stage buffer structure according to claim 1, characterized in that: An elastic damping layer (12) is provided above the fixed frame (6), and a honeycomb aluminum energy-absorbing box (11) is fixedly installed on the bottom surface of the elastic damping layer (12).

3. A forklift fall arrestor with a multi-stage buffer structure according to claim 2, characterized in that: The bottom surface of the honeycomb aluminum energy-absorbing box (11) is fixedly connected to two fixing slots (10), and the inner wall of each fixing slot (10) is inserted into the corresponding fixing block (9).

4. A forklift anti-fall protection frame with a multi-stage buffer structure according to claim 2, characterized in that: The upper surface of the fixing frame (6) is provided with several sliding grooves (15), and the interior of the fixing frame (6) is provided with several slots (16). The inner wall of each sliding groove (15) is connected to the corresponding slot (16).

5. A forklift anti-fall protection frame with a multi-stage buffer structure according to claim 4, characterized in that: The bottom surface of the elastic damping layer (12) is fixedly connected to several connecting rods (13), and the outer surface of each connecting rod (13) is slidably connected to the corresponding groove (15).

6. A forklift fall arrestor with a multi-stage buffer structure according to claim 5, characterized in that: Each of the slots (16) has a sliding plate (14) connected to its inner wall, and the upper surface of each of the slots (14) is fixedly installed with the corresponding connecting rod (13).

7. A forklift fall arrestor with a multi-stage buffer structure according to claim 1, characterized in that: The vehicle body (1) is provided with two pedal frames (2) on both sides, and the two pedal frames (2) are fixedly connected to the vehicle body (1) on the side that is close to each other.

8. A forklift fall arrestor with a multi-stage buffer structure according to claim 7, characterized in that: The vehicle body (1) has two handrails (3) on its outer side, and the bottom end of each handrail (3) is fixedly connected to the corresponding pedal frame (2).

Images