Cab roof protection structure and engineering machine

Abstract

The utility model discloses a cab roof protection structure and engineering machinery, including roof protection mainboard and soft impact protection device, and soft impact protection device installs on the top surface of roof protection mainboard in the area of driver's right above, soft impact protection device is composed of multiple array distribution's soft impact protection cell, and soft impact protection cell is hollow thin wall structure, and the impact kinetic energy that reduces transmission to the cab through the plastic deformation of soft impact protection cell. The utility model discloses on the basis of existing roof protection structure increases " soft impact protection cell", when roof protection structure is impacted by falling object, " soft impact protection cell " can reduce the impact force of time, and prolongs the impact time. Meanwhile, its plastic deformation also can dissipate a part of impact energy, thereby reducing the impact kinetic energy that transmission to the cab, improves the safety of cab and personnel.

Description

Technical Field

[0001] This utility model relates to a protective structure for the top of a driver's cab, belonging to the field of driver's cab technology. Background Technology

[0002] Hydraulic excavators are a common type of construction machinery, frequently used in mining and building construction. These applications often involve dealing with the potential danger of falling objects from heights, jeopardizing driver safety. The cab, as the control space, serves as a safety barrier protecting the driver from the impact of falling heavy objects. To address these risks, cabs are typically equipped with a roof protection structure. However, existing cab roof protection structures generally have excessive rigidity and insufficient cushioning. From an impact dynamics perspective, when the roof protection structure is impacted, excessive rigidity leads to excessive instantaneous acceleration, resulting in an excessively high impact force transmitted to the cab, posing a significant risk to both the cab and the operator. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides a cab roof protection structure with a "soft impact" effect. It adds "soft impact protection cells" to the existing roof protection structure. These "soft impact protection cells" are thin-walled structures that are easily deformed. They are connected to the roof protection main board by screws and are arrayed on the roof protection main board.

[0004] This utility model is achieved according to the following technical solution: In a first aspect, this utility model provides a cab roof protective structure, comprising: Top-protected motherboard; A soft impact protection device is installed on the top surface of the top protection main board located directly above the driver; the soft impact protection device consists of multiple arrayed soft impact protection cells, each of which is a hollow, thin-walled structure, and the impact kinetic energy transmitted to the cab is reduced through the plastic deformation of the soft impact protection cells.

[0005] In some embodiments, the soft impact protection cell is detachably connected to the top protection motherboard.

[0006] In some embodiments, the soft impact protection cell is provided with a plurality of through holes, and the top protection main board is provided with threaded holes arranged coaxially with the plurality of through holes. The soft impact protection cell is fixed on the top protection main board by screws engaging with the aligned through holes and threaded holes.

[0007] In some embodiments, the soft impact protection cell includes an upper convex cavity portion that allows for plastic deformation and a mounting portion distributed along the bottom edge of the upper convex cavity portion for fixing to the top protection main board.

[0008] In some embodiments, the upper convex cavity is a regular square truncated pyramid structure, and the mounting part is a U-shaped structure arranged around the entire bottom edge of the upper convex cavity; the upper convex cavity and the mounting part are integrally formed.

[0009] In some embodiments, the top protective motherboard has a window in the area where the soft impact protection device is removed, and a protective mesh is provided at the window.

[0010] In some embodiments, the protective netting consists of a plurality of longitudinal reinforcing ribs arranged at predetermined intervals on the same plane and at least one transverse reinforcing rib connected to the plurality of longitudinal reinforcing ribs.

[0011] In some embodiments, a side beam is fixed around the entire edge of the bottom surface of the top protective motherboard; and / or, The bottom surface of the top protective main board has at least one reinforcing rib fixed in the area below the soft impact protection device.

[0012] In some embodiments, at least one lifting lug is provided at the edge of the top surface of the top protective motherboard; and / or, At least one mounting bracket is provided at the edge of the bottom surface of the top protective motherboard.

[0013] Secondly, this utility model provides an engineering machinery, including the aforementioned cab roof protective structure.

[0014] The beneficial effects of this utility model are: This invention provides a top protection structure with a soft impact effect. Based on existing top protection systems, this structure redesigns the structural mass distribution and adjusts the local stiffness of the core area. Through the plastic deformation of the "soft impact protection cells," the impact time is prolonged, the impact acceleration is reduced, the impact force transmitted to the cab is decreased, and some impact energy is dissipated in advance, thereby reducing the impact kinetic energy transmitted to the cab and improving the safety of the cab and personnel.

[0015] The "soft impact protection cell" is designed with a modular structure, making it easy to replace when worn out. Attached Figure Description

[0016] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0017] In the attached diagram: Figure 1This is a front view of the cab roof protective structure of this utility model; Figure 2 This is a schematic diagram of the rear of the cab roof protective structure of this utility model; Figure 3 This is a schematic diagram of the soft impact protection cell of this utility model (a is a perspective view, b is a bottom view, and c is a cross-sectional view).

[0018] Attached diagram labels: 1. Top protective main board, 2. Longitudinal reinforcing rib, 3. Transverse reinforcing rib, 4. Soft impact protective cell, 5. Screw, 6. Lifting lug, 7. Side beam, 8. Side beam, 9. Side beam, 10. Mounting bracket, 11. Reinforcing rib, 12. Reinforcing rib, 13. Side beam, 14. Side beam.

[0019] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] From the perspective of impact dynamics, the two core indicators of impact protection are buffering and energy absorption. Buffering involves the mechanical indicators of clockwise impact force and clockwise acceleration. Energy absorption is the absorption of impact energy. From an engineering and safety perspective, impact protection structures should, as far as possible, delay the impact time, reduce clockwise impact force and clockwise acceleration, and dissipate impact energy as much as possible during this process to ensure the safety of the protected object / person.

[0024] The existing protective structures on the top of hydraulic excavator cabs are mostly composed of a single piece of steel plate or a grid structure. Their rigidity is generally too high, resulting in insufficient cushioning. This leads to excessively large instantaneous acceleration upon impact when heavy objects fall, with the impact kinetic energy being instantly transferred to the cab body. Excessive instantaneous acceleration poses a significant risk to the operator. Furthermore, the redundant rigidity results in a single energy dissipation mode, primarily relying on elastic energy dissipation.

[0025] like Figure 1 , Figure 2 As shown, a cab roof protection structure includes a roof protection main board 1 and a soft impact protection device. The soft impact protection device is installed on the top surface of the roof protection main board 1 located directly above the driver. The soft impact protection device is composed of multiple arrayed soft impact protection cells 4. The soft impact protection cells 4 are hollow thin-walled structures. The impact kinetic energy transmitted to the cab is reduced by the plastic deformation of the soft impact protection cells 4.

[0026] As can be seen from the above, this utility model provides a cab roof protection structure with a "soft impact" effect. It adds "soft impact protection cells" to the existing roof protection structure. When the roof protection structure is impacted by falling objects, the "soft impact protection cells" reduce the instantaneous impact force and prolong the impact time. Simultaneously, their plastic deformation dissipates some of the impact energy, thereby reducing the impact kinetic energy transmitted to the cab and improving the safety of the cab and its occupants.

[0027] The following provides a further explanation of the specific structure of the soft impact protection cell described above.

[0028] like Figure 1 , Figure 2 , Figure 3 As shown, the soft impact protection cell 4 is detachably connected to the top protection motherboard 1, making it easy to replace when worn out.

[0029] Preferred solutions, such as Figure 1 , Figure 2 , Figure 3 As shown, the soft impact protection cell 4 is provided with multiple through holes, and the top protection main plate 1 is provided with threaded holes arranged coaxially with the multiple through holes. After the screw 5 is engaged with the aligned through holes and threaded holes, the soft impact protection cell 4 is fixed on the top protection main plate 1.

[0030] like Figure 3 As shown, the soft impact protection cell 4 includes an upper convex cavity that allows for plastic deformation and a mounting portion distributed along the bottom edge of the upper convex cavity for fixing to the top protection main board 1.

[0031] Preferred solutions, such as Figure 3 As shown, the upper convex cavity is a regular square truncated pyramid structure, and the mounting part is a U-shaped structure arranged around the entire bottom edge of the upper convex cavity. There is a through hole at each of the four corners of the mounting part; the upper convex cavity and the mounting part are integrally formed.

[0032] It should be noted that in actual design, the preferred structure of the soft impact protection cell given above is not the only option; any structure that provides a soft impact effect is acceptable. When designing the thickness of the soft impact protection cell, the ratio of wall thickness t to length L can be used, between 1 / 50 and 1 / 100. Of course, it is not limited to the above ratio range, and the wall thickness can be adjusted according to the actual impact conditions.

[0033] The following provides a further explanation of the specific structure of the aforementioned top protection motherboard.

[0034] like Figure 1 , Figure 2 As shown, the top protection unit 1 has a window (for later installation of a skylight) in the area where the soft impact protection device is removed, and a protective net is installed at this window.

[0035] Preferred solutions, such as Figure 1 , Figure 2 As shown, the protective net consists of multiple longitudinal reinforcing ribs 2 arranged at predetermined intervals on the same plane and at least one transverse reinforcing rib 3 connected to the multiple longitudinal reinforcing ribs 2.

[0036] Further options, such as Figure 1 , Figure 2 As shown, a side beam is fixed around the entire edge of the bottom surface of the top protective main board 1; at least one reinforcing rib is fixed on the bottom surface of the top protective main board 1 in the area below the soft impact protection device.

[0037] It should be noted that, as Figure 2 As shown, side beams 7, 8, 9, 13, and 14 surround the entire edge of the bottom surface of the top protective main board 1; the bottom surface of the top protective main board 1 is fixed with reinforcing ribs 11 and 12 in the area below the soft impact protection device.

[0038] Further options, such as Figure 1 , Figure 2 As shown, at least one lifting lug is provided at the edge of the top surface of the top protective main board 1; at least one mounting bracket is provided at the edge of the bottom surface of the top protective main board 1.

[0039] It should be noted that, as Figure 1 As shown, a lifting lug 6 is fixed at each of the four corners of the top surface of the top protective main board 1; as Figure 2 As shown, a mounting bracket 10 is fixed on each of the side beams 7 and 14, and two mounting brackets 10 are fixed on the side beam 9.

[0040] In summary, this invention provides a top protection structure with a soft impact effect. Based on existing top protection systems, this structure redesigns the structural mass distribution and adjusts the local stiffness of the core area. Through the plastic deformation of the "soft impact protection cells," the impact time is prolonged, the impact acceleration is reduced, the impact force transmitted to the cab is decreased, and some impact energy is dissipated in advance, thereby reducing the impact kinetic energy transmitted to the cab and improving the safety of the cab and personnel.

[0041] The "soft impact protection cell" is designed with a modular structure, making it easy to replace when worn out.

[0042] It should be noted that soft impact refers to extending the impact time and reducing the impact's clockwise acceleration. The core area of ​​the top protective structure refers to the area directly above the driver; it is believed that under the same impact load, the impact protection performance of this area determines the lower limit of the safety factor.

[0043] The following describes the engineering machinery provided by this utility model. The engineering machinery described below can be referred to in correspondence with the cab roof protection structure described above.

[0044] The engineering machinery provided by this utility model may include the cab roof protection structure as described in any of the above embodiments.

[0045] The beneficial effects achieved by the engineering machinery provided by this utility model are consistent with the beneficial effects achieved by the cab roof protection structure provided by this utility model, so they will not be repeated here.

[0046] It should be noted that the aforementioned construction machinery can be excavators.

[0047] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0048] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A cab roof protective structure, characterized in that, include: Top-protected motherboard; A soft impact protection device is installed on the top surface of the top protection main board located directly above the driver; The soft impact protection device consists of multiple arrayed soft impact protection cells, each of which is a hollow, thin-walled structure. The impact kinetic energy transmitted to the cab is reduced through the plastic deformation of the soft impact protection cells.

2. The cab roof protective structure according to claim 1, characterized in that: The soft impact protection cell is detachably connected to the top protection motherboard.

3. The cab roof protective structure according to claim 2, characterized in that: The soft impact protection cell has multiple through holes, and the top protection main board has threaded holes arranged coaxially with the multiple through holes. The soft impact protection cell is fixed on the top protection main board by screws engaging with the aligned through holes and threaded holes.

4. The cab roof protective structure according to claim 1, characterized in that: The soft impact protection cell includes an upper convex cavity that allows for plastic deformation and a mounting portion distributed along the bottom edge of the upper convex cavity for fixing to the top protection main board.

5. The cab roof protective structure according to claim 4, characterized in that: The upper convex cavity is a regular square truncated pyramid structure, and the mounting part is a U-shaped structure arranged around the entire bottom edge of the upper convex cavity; the upper convex cavity and the mounting part are integrally formed.

6. The cab roof protective structure according to claim 1, characterized in that: The top protective motherboard has a window in the area where the soft impact protection device is removed, and a protective net is installed in the window.

7. A cab roof protective structure according to claim 6, characterized in that: The protective net consists of multiple longitudinal reinforcing ribs arranged at predetermined intervals on the same plane and at least one transverse reinforcing rib connected to the multiple longitudinal reinforcing ribs.

8. The cab roof protective structure according to claim 1, characterized in that: A fixed edge beam is installed around the entire edge of the bottom surface of the top protective mainboard; and / or, The bottom surface of the top protective main board has at least one reinforcing rib fixed in the area below the soft impact protection device.

9. A cab roof protective structure according to claim 1, characterized in that: At least one lifting lug is provided at the edge of the top surface of the top protective mainboard; and / or, At least one mounting bracket is provided at the edge of the bottom surface of the top protective motherboard.

10. An engineering machinery, characterized in that: Includes the cab roof protective structure as described in any one of claims 1 to 9.

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