Walking board device and engineering machinery

Abstract

The utility model provides a walking board device and engineering machinery, the walking board device and a rear frame used for the engineering machinery, the walking board device comprises a walking board frame, the walking board frame comprises a transverse supporting frame extending in the vehicle width direction and vertical supporting legs supported at the bottom of the transverse supporting frame, and the vertical supporting legs are used for being detachably connected with the rear frame; a maintenance space is defined by the transverse supporting frame and the vertical supporting legs. And the walking board covering assembly covers the top of the transverse supporting frame and is detachably connected with the transverse supporting frame, and the walking board covering assembly comprises a middle cover plate extending in the vehicle width direction and two side cover plates located at the two ends of the middle cover plate correspondingly. The walking board device adopts a split assembly type structure of the walking board frame and the walking board covering assembly, and compared with a welding type integrated walking board structure, welding seams are reduced, the structural strength is improved, and the maintenance convenience can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor vehicles, and particularly relates to a walkway device and a construction machinery Background Art

[0002] In existing construction machinery such as large loaders, the walkway is generally a welded integral part. And the walkway is assembled on the rear frame in a cantilevered manner. Usually, a closed connection is formed between the walkway and the rear frame. Although the sealing performance is good, the maintainability is poor. Generally, maintenance openings are opened on the closed structure, but the openings are generally small, making it difficult to carry out large-scale maintenance operations. It is also very difficult to accommodate the pipeline layouts of external components such as hydraulic oil radiators and accumulators at the closed part between the walkway and the rear frame

[0003] In addition, since the walkway is a welded integral part, it cannot be disassembled layer by layer and can only be disassembled as a whole, which increases the maintenance difficulty. The cantilever structure of the walkway has low strength and its supporting effect will reduce the durability over time, and there is a risk of weld cracking Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a walkway device and a construction machinery, aiming to solve the technical problem that the walkway structure in the prior art is not convenient for maintenance

[0005] To achieve the above purpose, the utility model provides a walkway device for the rear frame of a construction machinery. The walkway device includes: a walkway frame, including a transverse support frame extending in the vehicle width direction and vertical legs supported at the bottom of the transverse support frame. The vertical legs are used for detachably connecting with the rear frame, and a maintenance space is formed between the transverse support frame and the vertical legs; a walkway covering assembly, covering the top of the transverse support frame and detachably connecting with the transverse support frame. The walkway covering assembly includes a middle cover plate extending in the vehicle width direction and two side cover plates respectively located at both ends of the middle cover plate

[0006] In an embodiment of the utility model, the vertical leg includes: a bending plate, and the two bending plates are respectively connected to both ends of the transverse support frame in the vehicle length direction; a connecting plate, connected between the two bending plates. The connecting plate is arranged close to the bottom of the bending plate, and an arc-shaped notch protruding downward is arranged at the top of the connecting plate

[0007] In an embodiment of the utility model, the bending plate includes: a horizontal support leg portion, extending in the vehicle width direction and connected to the transverse support frame; a vertical support leg portion, bent and connected to the bottom of the horizontal support leg portion

[0008] In an embodiment of the utility model, the vertical leg further includes a frame mounting plate connected to the bottoms of the two bending plates. The rear frame is provided with a mounting seat, and the frame mounting plate is used to match the mounting seat

[0009] In the embodiment of the present utility model, the number of the vertical legs is two, and the two vertical legs are symmetrically connected to both ends of the transverse support frame in the length direction.

[0010] In the embodiment of the present utility model, the side cover plate includes an independent side platform and a side ladder. The side platform is a transverse plate extending along the vehicle length direction, and an inclined ladder portion is provided on one side of the side ladder away from the side platform.

[0011] In the embodiment of the present utility model, the transverse support frame is of a box structure.

[0012] In the embodiment of the present utility model, the transverse support frame includes: two main plates, which extend along the vehicle width direction and are arranged at intervals relatively; stress transmission plates, and a plurality of the stress transmission plates are connected between the two main plates at intervals along the vehicle width direction.

[0013] In the embodiment of the present utility model, the plurality of stress transmission plates are respectively a thick connection plate, a thin connection plate, and an X-shaped connection plate. The thin connection plate is located between the X-shaped connection plate and the thick connection plate, and the cross-sectional dimension of the thick connection plate is larger than that of the thin connection plate.

[0014] The present utility model also proposes a construction machinery, and the construction machinery includes the platform device as described above.

[0015] Through the above technical solutions, the platform device provided by the embodiment of the present utility model has the following beneficial effects:

[0016] The catwalk frame can be assembled with bolts and washers at the support points on both sides of the box-shaped structure of the rear frame. The middle cover plate and the side cover plates on both sides, as covering parts, are also assembled on the catwalk frame in an assembled form to achieve detachable support for the catwalk frame and the catwalk covering assembly. The catwalk device is an assembled structure. The catwalk frame, the catwalk covering assembly, and the rear frame are disassembled, reducing the connection at the welds, increasing the strength, and being flexibly configured, rather than the welded integral part in the prior art. And by adding the catwalk frame, the connection form between the catwalk frame and the rear frame is changed, and the connection form of each component from the rear frame to the catwalk device is changed from welding to assembly, greatly increasing the convenience of maintenance. Compared with the closed catwalk connection form, a maintenance space is formed between the transverse support frame and the vertical legs, which can be used for the pipeline routing requirements of optional components (such as hydraulic oil coolers, accumulators, etc.), increasing the operable space for maintenance. When it is necessary to hoist or disassemble internal components, the catwalk frame and the catwalk covering assembly can be disassembled separately, which is easy to maintain the internal parts under the catwalk covering assembly. When a large-scale maintenance operation is required inside the loader, it can be disassembled as a whole, which not only ensures the structural strength but also takes into account the maintainability. And both the side cover plates and the middle cover plate are uniformly installed on the middle catwalk frame. The covering parts are centrally installed on the same catwalk frame. Compared with different covering parts installed on different frames, it can effectively eliminate the gap problem between the surface frames during the assembly of the covering parts, reducing problems such as tolerances and welding errors during assembly and enhancing the aesthetics. The catwalk device in the present utility model adopts a split assembled structure of the catwalk frame and the catwalk covering assembly, reducing the welds compared with the welded integral catwalk structure, improving the structural strength, and enhancing the convenience of maintenance.

[0017] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide an understanding of the present utility model and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0019] Figure 1 is a schematic structural diagram of the catwalk frame of the catwalk device according to an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 an enlarged schematic diagram of area A in

[0021] Figure 3 is a partial structural diagram of the catwalk device according to an embodiment of the present utility model;

[0022] Figure 4 is Figure 3 an enlarged schematic diagram of area B in

[0023] Figure 5 is a schematic diagram of a walkway device and a rear vehicle frame according to an embodiment of the present utility model.

[0024] Explanation of reference numerals

[0025] Label Name Label Name

[0026] 1 Walkway frame 122 Connecting plate

[0027] 11 Lateral support frame 1221 Arc-shaped notch

[0028] 111 Main body plate 123 Frame mounting plate

[0029] 112 Stress transmission plate 2 Middle cover plate

[0030] 112a Thick connecting plate 3 Side cover plate

[0031] 112b Thin connecting plate 3a Side walkway

[0032] 112c X-shaped connecting plate 3b Side ladder

[0033] 12 Vertical leg 31 Inclined ladder part

[0034] 121 Bending plate 200 Rear vehicle frame

[0035] 1211 Horizontal support leg part 210 Mounting seat

[0036] 1212 Vertical support leg part Detailed implementation manners

[0037] The following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0038] The following describes a walkway device according to the present utility model with reference to the accompanying drawings.

[0039] As Figures 1 to 5 shown, in an embodiment of the present utility model, a walkway device for the rear vehicle frame 200 of a construction machine, the walkway device includes a walkway frame 1 and a walkway covering assembly. The walkway frame 1 includes a lateral support frame 11 extending in the vehicle width direction and vertical legs 12 supported at the bottom of the lateral support frame 11. The vertical legs 12 are used for detachable connection with the rear vehicle frame 200. A maintenance space is formed between the lateral support frame 11 and the vertical legs 12. The walkway covering assembly covers the top of the lateral support frame 11 and is detachably connected to the lateral support frame 11. The walkway covering assembly includes a middle cover plate 2 extending in the vehicle width direction and two side cover plates 3 respectively located at both ends of the middle cover plate 2.

[0040] Understandably, the two side cover plates 3 can be the left side cover plate on the left side and the right side cover plate on the right side respectively. The vehicle width direction is the left-right direction, and the vehicle length direction is the front-back direction.

[0041] In this embodiment, the platform frame 1 can be assembled to the support points on both sides of the box structure of the rear vehicle frame 200 by bolts and washers. The middle cover plate 2 and the two side cover plates 3 as covering parts are also assembled on the platform frame 1 in an assembled form, realizing the detachable support of the platform frame 1 and the platform covering assembly. The platform device is an assembled structure. The platform frame 1, the platform covering assembly, and the rear vehicle frame 200 are disassembled, reducing the connection at the weld, increasing the strength, and being flexibly configured, rather than the welded integral part in the prior art. And by adding the platform frame 1, the connection form between the rear vehicle frame 200 and the components of the platform device is changed from welding to assembly, greatly increasing the convenience of maintenance. Compared with the closed platform connection form, a maintenance space is formed between the horizontal support frame 11 and the vertical support legs 12, which can be used for the pipeline routing requirements of selected components (such as hydraulic oil radiators, accumulators, etc.), increasing the operable space for maintenance. When internal components need to be lifted or disassembled, the platform frame 1 and the platform covering assembly can be disassembled separately, facilitating the maintenance of the internal parts under the platform covering assembly. When major maintenance operations need to be carried out inside the loader, the whole can be disassembled, which not only ensures the structural strength but also takes into account the maintainability. And both the side cover plate 3 and the middle cover plate 2 are uniformly installed on the middle platform frame 1. By concentrating the covering parts on the same platform frame 1, compared with installing different covering parts on different frames, it can effectively eliminate the gap problem between the surface frames during the assembly of the covering parts, reduce problems such as assembly tolerances and welding errors, and enhance the aesthetics. The platform device in this embodiment adopts a split assembled structure of the platform frame 1 and the platform covering assembly, reducing the welds compared with the welded integral platform structure, improving the structural strength, and enhancing the convenience of maintenance.

[0042] Specifically, as Figure 1 shown, the vertical support leg 12 includes a bending plate 121 and a connecting plate 122. The two bending plates 121 are respectively connected to both ends of the horizontal support frame 11 along the vehicle length direction; the connecting plate 122 is connected between the two bending plates 121. The connecting plate 122 is arranged near the bottom of the bending plate 121, and an arc-shaped notch 1221 protruding downward is arranged at the top of the connecting plate 122. In this embodiment, the arc-shaped notch 1221 is arranged upward and is semicircular, which can avoid stress concentration, prevent the deformation of the vertical support leg 12, and improve the support stability of the vertical support leg 12. In this embodiment, the bending plate 121 can be an L-shaped plate. The top of the bending plate 121 is welded to the horizontal support frame 11, and the lower end of the bending plate 121 is detachably connected to the rear vehicle frame 200.

[0043] In one embodiment, the bent plate 121 includes a horizontal leg portion 1211 and a vertical leg portion 1212. The horizontal leg portion 1211 extends in the vehicle width direction and is connected to the transverse support frame 11; the vertical leg portion 1212 is bent and connected to the bottom of the horizontal leg portion 1211. In this embodiment, the horizontal leg portion 1211 and the transverse support frame 11 are completely overlapped and welded, the outer sides of the horizontal leg portion 1211 and the transverse support frame 11 are flush, and the inner side of the transverse support frame 11 is connected to the vertical leg portion 1212, which can increase the connection area between the bent plate 121 and the transverse support frame 11.

[0044] As Figure 2 shown, the vertical leg 12 further includes a frame mounting plate 123 connected to the bottoms of the two bent plates 121. The rear vehicle frame 200 is provided with a mounting seat 210, and the frame mounting plate 123 is used to match the mounting seat 210. In this embodiment, the frame mounting plate 123 is of a flat plate structure, and the frame mounting plate 123 and the mounting seat 210 are in surface contact, which can improve the support stability of the vertical leg 12. The connecting plate 122 is located above the frame mounting plate 123 and is connected to the frame mounting plate 123, which can improve the structural strength of the vertical leg 12.

[0045] In the embodiment of the present utility model, the number of the vertical legs 12 is two, and the two vertical legs 12 are symmetrically connected to both ends of the transverse support frame 11 in the length direction. In this embodiment, the two vertical legs 12 are respectively connected to the left and right ends of the transverse support frame 11 in the left-right direction, and the two vertical legs 12 jointly support the walkway frame 1, which can improve the connection stability between the walkway frame 1 and the rear vehicle frame 200.

[0046] As Figure 3 and Figure 4 shown, the side cover 3 includes an independent side walkway 3a and a side ladder 3b. The side walkway 3a is a transverse plate extending in the vehicle length direction. An inclined ladder portion 31 is provided on the side of the side ladder 3b away from the side walkway 3a. In this embodiment, the middle cover 2 extends in the left-right direction, and the side walkway 3a and the side ladder 3b extend in the front-rear direction. By separately providing the side walkway 3a and the side ladder 3b, in the case of maintenance, the side walkway 3a or the side ladder 3b can be separately disassembled without overall disassembly. As Figure 5 shown, the side ladder 3b may include a horizontal portion and an inclined ladder portion 31 welded to the horizontal portion. The inclined ladder portion 31 is inclined downward. The front end of the side ladder 3b can be connected to the walkway frame 1, the middle can be connected to the rear vehicle frame 200, and the tail can be connected to the counterweight of the construction machinery to form a three-point connection form, improving the assembly stability of the side ladder 3b.

[0047] In the embodiment of the present utility model, the transverse support frame 11 is of a box structure. The transverse support frame 11 in this embodiment can be made of section steel, and the transverse support frame 11 can be welded to the vertical leg 12. The box structure is more reliable than the cantilever structure in the prior art.

[0048] In the embodiment of the present utility model, the transverse support frame 11 includes a stress transmission plate 112 and two main plates 111. The two main plates 111 extend along the vehicle width direction and are arranged at intervals relative to each other; a plurality of stress transmission plates 112 are connected at intervals between the two main plates 111 along the vehicle width direction. The main plates 111 in this embodiment are long plates extending in the left-right direction. By connecting the main plates 111 at intervals through a plurality of stress transmission plates 112, the transverse support frame 11 can form a hollow structure, thereby reducing the weight of the platform device. It should be noted that the middle cover plate 2 and the side cover plate 3 in this embodiment are both perforated plates.

[0049] As Figure 1 shown, the plurality of stress transmission plates 112 are respectively a thick connecting plate 112a, a thin connecting plate 112b, and an X-shaped connecting plate 112c. The thin connecting plate 112b is located between the X-shaped connecting plate 112c and the thick connecting plate 112a, and the cross-sectional dimension of the thick connecting plate 112a is larger than that of the thin connecting plate 112b. The plurality of stress transmission plates 112 in this embodiment at least include a thick connecting plate 112a, a thin connecting plate 112b, and an X-shaped connecting plate 112c. The quantities of the thick connecting plate 112a, the thin connecting plate 112b, and the X-shaped connecting plate 112c can be set according to actual usage requirements, and the quantities can be the same or different. The thin connecting plate 112b located between the X-shaped connecting plate 112c and the thick connecting plate 112a can conduct stress transmission. The structure combining thick and thin can ensure the structural strength while reducing the overall weight of the platform device.

[0050] The present utility model also proposes a construction machinery. The construction machinery includes the above-mentioned platform device, and the specific structure of the platform device refers to the above embodiments. Since the construction machinery adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here. In one embodiment, the construction machinery can be applied to a large loader. In other embodiments, the platform device can be used not only for construction machinery such as loaders, but also for any device that requires high-frequency maintenance under the platform.

[0051] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0053] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. 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 can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A catwalk device for the rear frame (200) of a construction machine, characterized in that The walking platform device includes: A walking platform frame (1), including a transverse support frame (11) extending in the vehicle width direction and vertical legs (12) supported at the bottom of the transverse support frame (11). The vertical legs (12) are used for detachably connecting to the rear vehicle frame (200), and a maintenance space is formed between the transverse support frame (11) and the vertical legs (12); A walking platform covering assembly, covering the top of the transverse support frame (11) and detachably connecting to the transverse support frame (11). The walking platform covering assembly includes a middle cover plate (2) extending in the vehicle width direction and two side cover plates (3) respectively located at both ends of the middle cover plate (2).

2. The catwalk device according to claim 1, wherein, The vertical leg (12) includes: Bending plates (121), and the two bending plates (121) are respectively connected to both ends of the transverse support frame (11) along the vehicle length direction; A connecting plate (122), connected between the two bending plates (121). The connecting plate (122) is arranged near the bottom of the bending plate (121), and an arc-shaped notch (1221) protruding downward is provided at the top of the connecting plate (122).

3. The walkway device according to claim 2, characterized in that, The bending plate (121) includes: A horizontal supporting leg portion (1211), extending in the vehicle width direction and connecting to the transverse support frame (11); A vertical supporting leg portion (1212), bend-connected to the bottom of the horizontal supporting leg portion (1211).

4. The catwalk device according to claim 2, characterized in that, The vertical leg (12) further includes a frame mounting plate (123) connected to the bottoms of the two bending plates (121). The rear vehicle frame (200) is provided with a mounting seat (210), and the frame mounting plate (123) is used for matching the mounting seat (210).

5. The catwalk device according to any one of claims 1 to 4, characterized in that The number of the vertical legs (12) is two, and the two vertical legs (12) are symmetrically connected to both ends of the transverse support frame (11) in the length direction.

6. The catwalk device according to any one of claims 1 to 4, characterized in that, The side cover plate (3) includes an independent side walking platform (3a) and a side ladder (3b). The side walking platform (3a) is a transverse plate extending in the vehicle length direction, and an inclined ladder portion (31) is provided on one side of the side ladder (3b) away from the side walking platform (3a).

7. The catwalk device according to any one of claims 1 to 4, characterized in that The transverse support frame (11) is of a box structure.

8. The walkway device according to claim 7, wherein, The transverse support frame (11) includes: Two main plates (111), extending in the vehicle width direction and spaced relatively; Stress transmission plates (112), and a plurality of the stress transmission plates (112) are spaced and connected between the two main plates (111) in the vehicle width direction.

9. The catwalk device according to claim 8, characterized in that, The plurality of stress transmission plates (112) are respectively a thick connecting plate (112a), a thin connecting plate (112b), and an X-shaped connecting plate (112c). The thin connecting plate (112b) is located between the X-shaped connecting plate (112c) and the thick connecting plate (112a), and the cross-sectional dimension of the thick connecting plate (112a) is larger than that of the thin connecting plate (112b).

10. An engineering machinery, characterized in that, The construction machinery includes the walking platform device according to any one of claims 1 to 9.

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