A flip-up armrest box and excavator cab

Abstract

The present application relates to excavator technical field, especially to a kind of turnover handrail box and excavator cab.Handrail box, comprising: fixed frame and rotating frame;The fixed frame includes support plate and pedestal plate, the support plate and pedestal plate are parallel and have set distance between them, the top of the support plate is provided with track shaft;The rotating frame includes outer frame, track plate and control rod, the outer frame is rotatably connected with support plate at bottom rear side, the track plate is located in outer frame and is attached to one side of outer frame, the top of the track plate is rotatably connected with the outer frame, the bottom of the track plate is fixedly connected with the control rod, the middle part of the track plate is provided with track slot, the support plate is attached to track plate, and track shaft is inserted into the track slot of the track plate.The present application solves the problems of space limitation and poor man-machine feeling of existing fixed handrail box.

Description

Technical Field

[0001] This invention relates to the field of excavator technology, and more particularly to a tilting handrail box and an excavator cab. Background Technology

[0002] The excavator cab is where the excavator operator works day and night, and its structure and function are directly related to the operator's safety, work efficiency, and health. In addition to various operating components for controlling the excavator's movement, the cab also has a seat for the operator, with an armrest box installed on the side. The excavator cab uses a thin-shell metal structure, with a side door for the operator to enter and exit. Between the seat and the side door is an access passage for the operator to enter and exit the cab.

[0003] Excavator grab bars are primarily designed to provide convenience for operators, allowing them to store tools or personal belongings, and also serving as a support point when getting on and off the excavator. The grab bars are typically installed next to the cab door, on the side where the operator gets in and out of the machine, and are positioned so that the operator can easily grab them when entering and exiting the cab. When getting on and off the excavator, the operator can rely on the grab bars for support, reducing the risk of slipping and improving safety.

[0004] The existing fixed armrest box design restricts the space for getting on and off the vehicle, making it inconvenient for operators to enter and exit quickly and safely, and affecting the ergonomic experience. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a flip-up armrest box to solve the problems of space limitation and poor human-machine experience of the existing fixed armrest box.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A flip-up armrest box includes: a fixed frame and a rotating frame; the fixed frame includes a support plate and a base plate, the support plate and the base plate are parallel and have a set distance between them, and a track shaft is provided on the top of the support plate; the rotating frame includes an outer frame, a track plate and an operating lever, the outer frame is rotatably connected to the support plate at the bottom rear side, the track plate is located inside the outer frame and is attached to one side of the outer frame, the top of the track plate is rotatably connected to the outer frame, the bottom of the track plate is fixedly connected to the operating lever, a track groove is provided in the middle of the track plate, the support plate is attached to the track plate, and the track shaft is inserted into the track groove of the track plate.

[0008] Optionally, a first connecting plate is provided between the support plate and the support plate, and the two ends of the first connecting plate are respectively inserted and connected to the support plate and the support plate. The rear side of the support plate and the support plate is provided with a through hole for rotatably connecting with the rotating frame.

[0009] Optionally, the support plate includes a connecting section and a support section, the support section and the connecting section are at a set angle, the connecting section of the support plate has the same shape as the support plate, a through hole is provided on the connecting section, and the track shaft is provided on the top of the support section.

[0010] Optionally, the fixing frame further includes a base plate, the bottom of the support plate and the bottom of the base plate are both inserted into the rear side of the base plate, and the front side of the base plate is provided with an elongated hole for passing through the pilot wire.

[0011] Optionally, the outer frame includes a frame plate, which forms a cavity in the middle of both sides. The track plate is attached to one of the frame plates. The rear bottom of the two frame plates are connected by a second connecting plate, and the two ends of the second connecting plate are respectively inserted into the frame plates on both sides.

[0012] Optionally, the rotating frame and the fixed frame are rotatably connected by a pin, and a torsion spring is sleeved on the pin. One end of the torsion spring is engaged with the second connecting plate of the rotating frame, and the other end can press against the bottom plate of the fixed frame.

[0013] Optionally, the rear end of the second connecting plate protrudes from the frame plate, and the protruding part is bent downward. A stop block is provided on the rear side of the base plate of the fixed frame. When the rotating frame is flipped, the protruding part of the second connecting plate can press against the stop block.

[0014] Optionally, the track groove on the track plate includes an arc segment and a bent segment. The center of the arc segment is biased towards the support plate, and the bent segment is located on the upper side of the arc segment. The bent segment bends towards the handle. In the initial state of the rotating frame, the track shaft is located inside the bent segment. When the rotating frame rotates, the track shaft slides along the arc segment.

[0015] Optionally, a limit switch is provided on the inner side of the frame plate, and a fixed shaft is provided on the lower side of the rotatable connection between the track plate and the frame plate. A spring is provided between the fixed shaft and a point on the frame plate. In the initial state of the rotating frame, the rear top of the track plate is pressed against the limit switch.

[0016] This invention also provides an excavator cab, including a seat and a flip-up armrest box as described above, the flip-up armrest box being disposed on one side of the seat.

[0017] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0018] 1. This handrail box utilizes the rotatable connection between the fixed frame and the rotating frame, the rotatable connection between the top of the track plate and the outer frame, the fixed connection between the bottom of the track plate and the operating lever, and the cooperation between the track groove in the middle of the track plate and the track shaft of the support plate. This ensures that the handrail box can be rotated smoothly and flexibly. Furthermore, the cooperation between the track groove and the track shaft achieves precise positioning and stable movement of the rotating frame during use, improving the ease of operation and user experience of the handrail box. After the handrail box is rotated, it increases the space for getting on and off the vehicle, improving the comfort of people and machines.

[0019] 2. This armrest box features a rotating part located at the bottom rear side, with the support plate and guide plate positioned on the side of the outer frame. This design minimizes space occupation within the armrest box, maximizing its internal space utilization. Furthermore, it avoids both the lower and rear cable exit points, allowing for both rear and lower cable routing. This design accommodates various pilot selection options, enabling multiple pilot routing schemes for a single armrest box. Multiple machine models can share a single armrest box, reducing development costs.

[0020] Advantages of additional aspects of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the armrest box provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the first angle of the fixing frame provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the second angle of the fixing frame provided in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the first angle of the rotating frame provided in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the second angle of the rotating frame provided in an embodiment of the present invention;

[0027] Figure 6 This is a partially enlarged schematic diagram of the rotating connection between the fixed frame and the rotating frame provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the cooperation between the support plate and the track plate provided in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the initial state of the armrest box provided in an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the armrest box in a flipped state provided in an embodiment of the present invention;

[0031] Figure 10 These are schematic diagrams of two arrangements of the armrest box pilot line provided in the embodiments of the present invention;

[0032] In the diagram: 1. Fixed frame; 11. Support plate; 12. First connecting plate; 13. Support plate; 14. Base plate; 2. Rotating frame; 21. Outer frame; 211. Frame plate; 22. Control lever; 23. Track plate; 231. Track groove; 232. Track shaft; 24. Second connecting plate; 3. Stop block; 4. Torsion spring; 5. Limit switch; 6. Spring; 7. Pilot wire;

[0033] The distances or dimensions between parts have been exaggerated to show their positions; the diagram is for illustrative purposes only. Detailed Implementation

[0034] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] like Figure 1 As shown, one embodiment of the present invention proposes a flip-up armrest box, comprising: a fixed frame 1 and a rotating frame 2; as Figure 2 , Figure 3 As shown, the fixing frame 1 includes a support plate 11 and a support plate 13. The support plate 11 and the support plate 13 are parallel and have a set distance between them. The top of the support plate 11 is provided with a track shaft 232 (e.g., Figure 7 As shown). Figure 4 , Figure 5As shown, the rotating frame 2 includes an outer frame 21, a track plate 23, and a control lever 22. The outer frame 21 is rotatably connected to the support plate 11 at the bottom rear side. The track plate 23 is located inside the outer frame 21 and is attached to one side of the outer frame 21. The top of the track plate 23 is rotatably connected to the outer frame 21, and the bottom of the track plate 23 is fixedly connected to the control lever 22. A track groove 231 is provided in the middle of the track plate 23. The support plate 11 is attached to the track plate 23, and a track shaft 232 is inserted into the track groove 231 of the track plate 23. The attachment includes two parts being tightly attached or having a small gap between them.

[0036] The flip-up armrest box mainly consists of two parts: a fixed frame 1 and a rotating frame 2. The fixed frame 1 provides support, and a track shaft 232 is provided on the top of the support plate 11. The rotating frame 2 is responsible for connecting and supporting the armrest box, and consists of an outer frame 21, a track plate 23, and an operating lever 22. The outer frame 21 is rotatably connected to the support plate 11 (support plate 13) at the bottom rear side, and the track plate 23 is located inside the outer frame 21 and fits against one side of the outer frame 21.

[0037] This handrail box, through the rotatable connection of the fixed frame 1 and the rotating frame 2, the rotatable connection of the top of the track plate 23 to the outer frame 21, the fixed connection of the bottom of the track plate 23 to the operating lever, and the cooperation between the track groove 231 in the middle of the track plate 23 and the track shaft 232 of the support plate 11, ensures that the handrail box can be flipped smoothly and flexibly. Furthermore, the cooperation of the track groove 231 and the track shaft 232 enables the rotating frame 2 to achieve precise positioning and stable movement during use, improving the ease of operation and user experience of the handrail box. After the handrail box is flipped up, it increases the space for getting on and off the vehicle, improving the comfort of people and machines getting on and off.

[0038] Furthermore, existing armrest boxes typically place all motion mechanisms at the bottom, only allowing for rear-side cable routing of the pilot line, not simultaneous bottom-side pilot line routing. This armrest box, by placing the rotating part at the bottom rear and arranging the support plate 11 and the guide portion of the track plate 23 on the side of the outer frame 21, has a structure that occupies minimal armrest box space, resulting in a large internal space that maximizes space utilization. It also avoids both bottom and rear-side cable routing positions, allowing the pilot line to accommodate both rear and bottom-side routing (as shown in 10). This allows for multiple pilot line routing options within a single armrest box, enabling multiple machine models to share a single armrest box, thus reducing development costs.

[0039] like Figure 2 , Figure 3As shown, a first connecting plate 12 is provided between the support plate 11 and the support plate 13. The two ends of the first connecting plate 12 are respectively inserted and connected to the support plate 11 and the support plate 13. The rear side of the support plate 11 and the support plate 13 is provided with a through hole that is rotatably connected to the rotating frame 2.

[0040] The first connecting plate 12 connects the support plate 11 and the support plate 13 to form a more stable frame. The two ends of the first connecting plate 12 are respectively inserted into the support plate 11 and the support plate 13. The support plate 11 and the support plate 13 are provided with through holes on their rear sides to facilitate rotational connection with the rotating frame 2.

[0041] The support plate 11 includes a connecting section and a support section. The support section and the connecting section are at a set angle. The connecting section of the support plate 11 has the same shape as the support plate 13. A through hole is provided on the connecting section. The track shaft 232 is provided on the top of the support section.

[0042] The support plate 11 not only provides support but also serves a connecting function. Its shape design facilitates the spatial arrangement of the rotating and guiding parts, freeing up internal space and reducing space occupation, while also facilitating the placement of the pilot line 7. Furthermore, it allows for easy adjustment of the starting position of the rotating frame 2, improving operational comfort and precision. This angle setting allows users to adjust the armrest box more naturally, reducing the difficulty of manual adjustment and further enhancing the user experience and operational efficiency.

[0043] like Figure 2 As shown, the mounting bracket 1 also includes a base plate 14. The bottoms of the support plate 11 and the base plate 13 are both inserted into the rear side of the base plate 14. The front side of the base plate 14 has an elongated hole for the pilot wire 7 to pass through. The base plate 14 is an important component of the mounting bracket, serving to support the entire armrest box. The bottoms of the support plate 11 and the base plate 13 are both inserted into the rear side of the base plate 14, which allows the armrest box to be stably placed on the base plate 14.

[0044] like Figure 4 As shown, the outer frame 21 includes a frame plate 211, which forms a cavity in the middle of both sides. The track plate 23 is attached to the frame plate 211 on one side. The rear bottom of the two frame plates 211 are connected by a second connecting plate 24, and the two ends of the second connecting plate 24 are respectively inserted into the frame plates 211 on both sides.

[0045] The frame plate 211 is a major component of the outer frame 21, serving to support and protect the internal structure of the armrest box. The frame plate 211 is located in the middle of both sides, forming a cavity. This design helps to reduce the weight of the armrest box and also optimizes the internal space of the armrest box, ensuring structural strength without affecting the functionality of the armrest box.

[0046] like Figure 6 As shown, the rotating frame 2 and the fixed frame 1 are rotatably connected by a pin. A torsion spring 4 is sleeved on the pin. One end of the torsion spring 4 is engaged with the second connecting plate 24 of the rotating frame 2, and the other end can be pressed against the base plate 14 of the fixed frame 1.

[0047] The pivot pin is a key component connecting the rotating frame 2 and the fixed frame 1, enabling the rotating frame 2 to rotate smoothly. The combination of the pivot pin and the torsion spring 4 achieves the elastic return function of the rotating frame 2. The design of the torsion spring 4 ensures that the rotating frame 2 automatically returns to its initial position after release, improving ease of use and safety. This automatic return function reduces the burden of manual reset operations and enhances the user experience.

[0048] The rear end of the second connecting plate 24 protrudes from the frame plate 211, and the protruding part is bent downward. A stop block 3 is provided on the rear side of the base plate 14 of the fixed frame 1. The stop block 3 is a rubber block. When the rotating frame 2 is flipped, the protruding part of the second connecting plate 24 can press against the stop block 3.

[0049] The protruding part cooperates with the stop block 3 of the base plate 14 to achieve precise positioning of the rotating frame 2. This positioning mechanism ensures the stability and reliability of the armrest box during use, avoids accidental movement of the armrest box during operation, and improves safety and the accuracy of user operation.

[0050] like Figure 7 As shown, the track groove 231 on the track plate 23 includes an arc segment and a bent segment. The center of the arc segment is biased towards the support plate 11. The bent segment is located on the upper side of the arc segment and bends towards the handle. In the initial state of the rotating frame 2, the track shaft 232 is located inside the bent segment. When the rotating frame 2 rotates, the track shaft 232 slides along the arc segment.

[0051] The optimized design of the track groove 231 improves the sliding path of the track shaft 232, thereby enhancing the rotation angle and smoothness of the rotating frame 2, making the armrest box rotate more smoothly, and also increasing the service life of the armrest box.

[0052] like Figure 8 , Figure 9 As shown, a limit switch 5 is provided on the inner side of the frame plate 211, and a fixed shaft is provided on the lower side of the rotatable connection between the track plate 23 and the frame plate 211. A spring 6 is provided between the fixed shaft and a point on the frame plate 211. The spring 6 is in a stretched state. In the initial state of the rotating frame 2, the rear top of the track plate 23 is pressed against the limit switch 5.

[0053] The spring 6 ensures that the rotating frame 2 can effectively reset and lock stably. This self-locking function is crucial for ensuring operational safety and preventing accidental tipping. When the handrail box flips, the track plate 23 moves away from the limit switch 5, thereby disconnecting the relevant power supply to the equipment and ensuring safety.

[0054] The fixed frame 1 and the rotating frame 2 can be made of high-quality metal materials, which ensures the structural strength and stability of the handrail box, enabling it to withstand various external forces during excavator operation, thereby improving the service life and performance of the handrail box.

[0055] Additionally, a wear-resistant coating can be applied to the surface of the track groove 231 to reduce frictional resistance and make the armrest box rotate more smoothly. At the same time, the wear-resistant coating protects the track groove 231 and extends its service life.

[0056] The control lever 22 is equipped with a handle, which makes it convenient for the driver to lift the armrest box when it needs to be moved.

[0057] The existing handrail box is bulky and has a complex and cumbersome assembly process, which not only increases production costs but also makes maintenance and replacement inconvenient. Moreover, the complex manufacturing process is not compatible with the ergonomics of the excavator, increasing the difficulty of operation and inconvenience for the operator.

[0058] This armrest box achieves the same function with a simpler structure, lower production and assembly costs, convenient manufacturing process, reasonable structural design, extremely high ergonomic comfort, and comfortable and flexible operation.

[0059] This embodiment also proposes an excavator cab, including a seat and a flip-up armrest box as described above, the flip-up armrest box being disposed on one side of the seat. The excavator cab is the working environment for operating the excavator, and the seat provides the driver with a comfortable seating posture. The flip-up armrest box, disposed on one side of the seat, fully utilizes the flexibility and stability of the armrest box, improving the comfort and efficiency of excavator operation.

[0060] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A flip-up armrest box, characterized in that, include: Fixed frame and rotating frame; The fixing frame includes a support plate and a support plate, the support plate and the support plate are parallel and there is a set distance between them, and a track shaft is provided on the top of the support plate; The rotating frame includes an outer frame, a track plate, and a control lever. The outer frame is rotatably connected to the support plate at the bottom rear side. The track plate is located inside the outer frame and is attached to one side of the outer frame. The top of the track plate is rotatably connected to the outer frame, and the bottom of the track plate is fixedly connected to the control lever. A track groove is provided in the middle of the track plate. The support plate is attached to the track plate, and the track shaft is inserted into the track groove of the track plate. The outer frame includes a frame plate, which forms a cavity in the middle of both sides. The track plate is attached to one of the frame plates. The bottom rear sides of the two frame plates are connected by a second connecting plate, with both ends of the second connecting plate inserted into the frame plates on both sides respectively. The track groove on the track plate includes an arc-shaped section and a bent section. The center of the arc-shaped section is biased towards the support plate. The bent section is located on the upper side of the arc-shaped section and bends towards the handle. In the initial state of the rotating frame, the track shaft is located inside the bent section. When the rotating frame rotates, the track shaft slides along the arc-shaped section.

2. The flip-up armrest box as described in claim 1, characterized in that, A first connecting plate is provided between the support plate and the support plate. The two ends of the first connecting plate are respectively inserted and connected to the support plate and the support plate. The rear side of the support plate and the support plate is provided with a through hole for rotatable connection with the rotating frame.

3. The flip-up armrest box as described in claim 2, characterized in that, The support plate includes a connecting section and a support section. The support section and the connecting section are at a set angle. The connecting section of the support plate has the same shape as the support plate. A through hole is provided on the connecting section, and the track shaft is provided on the top of the support section.

4. The flip-up armrest box as described in claim 2, characterized in that, The fixing frame also includes a base plate, the bottom of the support plate and the bottom of the base plate are both inserted into the rear side of the base plate, and the front side of the base plate is provided with an elongated hole for passing through the pilot wire.

5. The flip-up armrest box as described in claim 1, characterized in that, The rotating frame and the fixed frame are rotatably connected by a pin. A torsion spring is sleeved on the pin. One end of the torsion spring is engaged with the second connecting plate of the rotating frame, and the other end can press against the bottom plate of the fixed frame.

6. The flip-up armrest box as described in claim 1, characterized in that, The rear end of the second connecting plate protrudes from the frame plate, and the protruding part is bent downward. A stop block is provided on the rear side of the base plate of the fixed frame. When the rotating frame flips, the protruding part of the second connecting plate can press against the stop block.

7. The flip-up armrest box as described in claim 1, characterized in that, A limit switch is provided on the inner side of the frame plate, and a fixed shaft is provided on the lower side of the rotatable connection between the track plate and the frame plate. A spring is provided between the fixed shaft and a point on the frame plate. In the initial state of the rotating frame, the rear top of the track plate is pressed against the limit switch.

8. An excavator cab, characterized in that, Includes a seat and a flip-up armrest box as described in any one of claims 1-7, the flip-up armrest box being disposed on one side of the seat.

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