A new excavator cab rollover mechanism with shock absorption

Abstract

The utility model discloses a novel excavator cab turnover mechanism with damping, including excavator platform, the middle of excavator platform top is equipped with gearbox, and excavator platform top side is equipped with cab assembly, be equipped with mounting bracket on excavator platform, be equipped with turnover mechanism on mounting bracket, be equipped with damping assembly between excavator platform and cab assembly, the utility model discloses a turnover mechanism drive cab assembly turnover through mounting bracket, can avoid the space required for gearbox maintenance, and the damping assembly is equipped between excavator platform and cab assembly, compared with existing hard connection turnover structure, effectively blocks the direct transmission of fuselage vibration to cab, retains the original damping performance of cab, improves driving comfort and operation experience, and damping assembly and turnover mechanism work together, and give consideration to maintenance demand and driving feeling, improve equipment use satisfaction and comprehensive practicality.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic excavator technology, and in particular to a novel excavator cab tilting mechanism with shock absorption. Background Technology

[0002] Wheeled excavators are widely used in municipal engineering, road repair, and small-scale infrastructure projects due to their mobility, flexibility, and ease of relocation. Among them, wheeled excavators with manual transmission and mechanical drive occupy an important market share due to their high transmission efficiency and low structural maintenance costs. However, there is an inherent contradiction in the structural design of this type of wheeled excavator, which significantly restricts the ease of maintenance of the equipment.

[0003] On wheeled excavators using a manual transmission and mechanical drive system, the drive shaft must be located at the center of rotation of the excavator platform. However, due to the limited width of the platform and the close proximity of the transmission to the excavator cab, disassembly, assembly, and maintenance of the transmission become extremely inconvenient. Some excavators on the market have addressed this issue by implementing a cab tilting mechanism, thus resolving the difficulty of transmission maintenance. However, current cab tilting mechanisms on the market all use rigid hinges, with the other end connected to the platform via a mounting bracket. While this achieves the tilting mechanism, it sacrifices the original shock absorption performance of the cab, resulting in significantly increased cab vibration amplitude and a substantial decrease in operator comfort. Long-term operation may also adversely affect the operator's health, severely limiting the operating experience and user satisfaction of this type of excavator.

[0004] To address this issue, a novel excavator cab tilting mechanism with shock absorption is proposed to solve the problems existing in the current technology. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems by providing a novel excavator cab tilting mechanism with shock absorption. This utility model uses a tilting mechanism on a mounting frame to drive the cab assembly to tilt, thus creating space for gearbox maintenance. Simultaneously, a shock-absorbing component is installed between the excavator platform and the cab assembly. Compared to existing rigid-connection tilting structures, this effectively blocks the direct transmission of machine vibration to the cab, preserving the original shock absorption performance of the cab and improving driving comfort and operating experience. Furthermore, the shock-absorbing component and the tilting mechanism work together to balance maintenance needs and driving experience, improving equipment user satisfaction and overall practicality. To achieve the above-mentioned utility model objectives, the technical solution adopted is as follows: According to one aspect of the present invention, a novel excavator cab tilting mechanism with shock absorption is provided, comprising an excavator platform, a gearbox located at the center of the top of the excavator platform, and a cab assembly located on the side of the top of the excavator platform. A mounting frame is provided on the excavator platform, and a tilting mechanism is provided on the mounting frame. A shock absorption component is provided between the excavator platform and the cab assembly.

[0006] Preferably, the tilting mechanism includes an electric push rod hinged to the mounting frame, with a long connecting rod and a short connecting rod coaxially arranged on the output end of the electric push rod. The bottom of the cab assembly is provided with a tilting rocker arm, which is L-shaped. The other end of the tilting rocker arm is hinged to the excavator platform through a tilting pin. The other end of the long connecting rod is coaxially hinged to the tilting rocker arm, and the other end of the short connecting rod is hinged to the bottom of the cab assembly.

[0007] Preferably, the shock absorption assembly includes a cab shock absorption mechanism and a bushing shock absorption mechanism. The cab shock absorption mechanism includes multiple placement platforms evenly distributed on the excavator platform, and each placement platform is provided with a placement slot. Each placement slot is provided with a cab shock absorber, and each cab shock absorber is fitted with a mounting plate. Each mounting plate cooperates with the corresponding placement platform.

[0008] Preferably, the bushing damping mechanism includes a damping groove formed on the tilting rocker arm, a bushing damper is provided in the damping groove, and the bushing damper is a hollow cylindrical shape, and the bushing damper is sleeved on the outer circumference of the tilting pin.

[0009] Preferably, each of the cab shock absorbers is a bell-shaped shock absorber.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: This utility model discloses a novel excavator cab tilting mechanism with shock absorption. The cab assembly is tilted by a tilting mechanism on the mounting frame, which can avoid the space required for gearbox maintenance. At the same time, a shock absorption component is provided between the excavator platform and the cab assembly. Compared with the existing rigid connection tilting structure, it effectively blocks the direct transmission of machine vibration to the cab, preserves the original shock absorption performance of the cab, and improves driving comfort and operating experience. Furthermore, the shock absorption component and the tilting mechanism work together to take into account both maintenance needs and driving experience, thereby improving equipment user satisfaction and overall practicality. Attached Figure Description

[0011] Figure 1 This is an exploded three-dimensional structural diagram of this utility model; Figure 2 This is a utility model Figure 1 Rear view; Figure 3 This is a bottom view of the present invention; Figure 4 This is a three-dimensional schematic diagram of the cab assembly of this utility model when it is flipped over; Figure 5 This is a schematic diagram of the cab assembly of this utility model in its retracted state; Figure 6 This is a schematic diagram of the cab assembly of this utility model when it is flipped over; In the attached diagram: 1. Excavator platform; 2. Gearbox; 3. Cab assembly; 4. Mounting bracket; 5. Electric push rod; 6. Long connecting rod; 7. Short connecting rod; 8. Tilting rocker arm; 9. Tilting pin; 10. Placement platform; 11. Placement slot; 12. Cab shock absorber; 13. Mounting plate; 14. Shock absorber slot; 15. Bushing shock absorber. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the utility model, and these aspects can be achieved even without these specific details.

[0013] Please see Figures 1 to 6 This utility model provides a novel excavator cab tilting mechanism with shock absorption, the technical solution of which is as follows: The device includes an excavator platform 1, a gearbox 2 located at the top center of the excavator platform 1, a cab assembly 3 located on the top side of the excavator platform 1, a mounting frame 4 on the excavator platform 1, a tilting mechanism on the mounting frame 4, and a shock absorption assembly between the excavator platform 1 and the cab assembly 3.

[0014] The cab assembly 3 is tilted by the tilting mechanism on the mounting frame 4, which can make way for the space required for maintenance of the gearbox 2. At the same time, a shock-absorbing component is installed between the excavator platform 1 and the cab assembly 3. Compared with the existing rigid connection tilting structure, this effectively blocks the direct transmission of machine vibration to the cab, preserves the original shock absorption performance of the cab, and improves driving comfort and operating experience. Furthermore, the shock-absorbing component and the tilting mechanism work together to take into account both maintenance needs and driving experience, thereby improving equipment user satisfaction and overall practicality.

[0015] The tilting mechanism includes an electric push rod 5 hinged to the mounting frame 4. The output end of the electric push rod 5 is coaxially provided with a long connecting rod 6 and a short connecting rod 7. The bottom of the cab assembly 3 is provided with a tilting rocker arm 8, which is L-shaped. The other end of the tilting rocker arm 8 is hinged to the excavator platform 1 through a tilting pin 9. The other end of the long connecting rod 6 is coaxially hinged to the tilting rocker arm 8, and the other end of the short connecting rod 7 is hinged to the bottom of the cab assembly 3.

[0016] Using electric push rod 5 as the power source, compared with the manual tilting structure, it does not require the application of large force by the operator, and can realize the automatic and precise tilting and retraction of the cab assembly 3, reducing the intensity of operation; moreover, the output force of electric push rod 5 is stable, which can ensure that the cab moves at a uniform speed during the tilting process, avoiding the tilting jam or impact caused by uneven manual operation force, thus improving the safety and convenience of operation. Through the coordinated hinge design of long link 6, short link 7 and L-shaped tilting rocker arm 8, a stable four-bar linkage mechanism is formed. With the fixed hinge point of tilting pin 9, the tilting trajectory of cab assembly 3 can be strictly limited, ensuring that it can accurately avoid the gearbox 2 area during tilting and maximize the release of maintenance space. At the same time, the structural design of L-shaped tilting rocker arm 8 can optimize the force transmission path, reduce torque loss during tilting, improve the transmission efficiency of the mechanism, and make the cab tilting smoother.

[0017] The shock absorption assembly includes a cab shock absorption mechanism and a bushing shock absorption mechanism. The cab shock absorption mechanism includes multiple placement platforms 10 evenly distributed on the excavator platform 1, and each placement platform 10 is provided with a placement slot 11. Each placement slot 11 is provided with a cab shock absorber 12, and each cab shock absorber 12 is fitted with a mounting plate 13. Each mounting plate 13 cooperates with the corresponding placement platform 10. Each cab shock absorber 12 is a bell-shaped shock absorber.

[0018] The selected bell-shaped shock absorbers have unique structural advantages. They can efficiently absorb the vibration energy generated during excavator operation by means of built-in elastomers, and disperse the vibration force in multiple directions to avoid concentrated transmission of vibration. This significantly reduces the impact of machine vibration on the cab and solves the problem of sacrificing shock absorption performance in traditional rigid connection tilting structures. At the same time, multiple shock absorbers are evenly distributed to bear the weight and vibration of the cab assembly 3 in an all-round and balanced manner, avoiding excessive local vibration and further improving the uniformity and stability of shock absorption, making the driver's operation and riding experience more comfortable.

[0019] The bushing damping mechanism includes a damping groove 14 formed on the tilting rocker arm 8. A bushing damper 15 is provided in the damping groove 14, and the bushing damper 15 is a hollow cylindrical shape. The bushing damper 15 is sleeved on the outer circumference of the tilting pin 9.

[0020] The bushing shock absorber 15 adopts a hollow cylindrical structure and is sleeved on the outer circumference of the tilting pin 9, directly replacing the rigid connection method of the traditional hard-connection hinge. The vibration generated during the operation of the excavator will be transmitted to the hinge through the tilting pin 9. The elastic material of the bushing shock absorber 15 can effectively absorb and attenuate the vibration energy, preventing the vibration from being directly transmitted to the cab through the connection between the tilting rocker arm 8 and the tilting pin 9. It forms a dual shock absorption synergy effect with the cab shock absorption mechanism, further reducing the impact of machine vibration on the cab. It solves the vibration transmission problem caused by the rigid hinge of the existing tilting mechanism and significantly improves driving comfort.

[0021] Workflow: The excavator platform 1 serves as the mounting platform. The bushing shock absorber 15 is installed in the inner hole of the tilting rocker arm 8. The bushing shock absorber 15 is connected to the excavator platform 1 via the tilting pin 9. The tilting rocker arm 8 can rotate around the tilting pin 9, acting as a tilting hinge. The tilting rocker arm 8 is connected to the cab assembly 3 via screws. The cab assembly 3, the tilting rocker arm 8, and the excavator platform 1 form a rotating pair, enabling the tilting of the cab. The tail mounting hole of the electric push rod 5 is connected to the ear plate of the excavator platform 1. The front mounting hole of the electric push rod 5 is connected to one end of the short connecting rod 7 and the long connecting rod 6. The short connecting rod 7 is connected to the bottom ear plate of the cab assembly 3, and the long connecting rod 6 is connected to the corresponding mounting ear plate of the excavator platform 1. The excavator platform 1, the tilting rocker arm 8, the short connecting rod 7, and the long connecting rod 6 together form a four-bar linkage. When the electric push rod 5 extends, it pushes the aforementioned four-bar linkage, causing the cab to rise. When the electric push rod 5 retracts, the cab lowers. When the electric push rod 5 is fully retracted, the cab assembly 3 descends to contact the cab shock absorber 12 mounted on the excavator platform 1. The cab assembly 3 is connected to the cab shock absorber 12 by screws. When the electric push rod 5 is fully retracted, its front mounting hole is located at the midpoint of the long hole at the end of the short connecting rod 7. In this way, the electric push rod 5 does not restrict the vertical movement of the cab, and the shock absorption is effective.

[0022] Among them, the bushing shock absorber 15 is a cylindrical shock absorber with both its inner and outer rings made of steel, which are connected by soft rubber; the inner ring is connected to the excavator platform 1 through the flip pin 9, and the outer ring is connected to the cab assembly 3 through the flip rocker arm 8; the cab shock absorber 12 is a bell-shaped shock absorber with its outer shell and core made of steel, which are connected by soft rubber in the middle; the outer shell is connected to the excavator platform 1, and the core is connected to the cab assembly 3.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A novel excavator cab tilting mechanism with shock absorption, characterized in that, include: The excavator platform (1) has a gearbox (2) in the middle of the top of the excavator platform (1) and a cab assembly (3) on the side of the top of the excavator platform (1). The excavator platform (1) has a mounting frame (4) and a tilting mechanism. A shock absorption component is provided between the excavator platform (1) and the cab assembly (3).

2. The novel excavator cab tilting mechanism with shock absorption according to claim 1, characterized in that: The tilting mechanism includes an electric push rod (5) hinged to the mounting frame (4). The output end of the electric push rod (5) is coaxially provided with a long connecting rod (6) and a short connecting rod (7). The bottom of the cab assembly (3) is provided with a tilting rocker arm (8), and the tilting rocker arm (8) is L-shaped. The other end of the tilting rocker arm (8) is hinged to the excavator platform (1) through a tilting pin (9). The other end of the long connecting rod (6) is coaxially hinged to the tilting rocker arm (8), and the other end of the short connecting rod (7) is hinged to the bottom of the cab assembly (3).

3. The novel excavator cab tilting mechanism with shock absorption according to claim 2, characterized in that: The shock absorption assembly includes a cab shock absorption mechanism and a bushing shock absorption mechanism. The cab shock absorption mechanism includes multiple placement platforms (10) evenly distributed on the excavator platform (1), and each placement platform (10) is provided with a placement slot (11). Each placement slot (11) is provided with a cab shock absorber (12), and each cab shock absorber (12) is fitted with a mounting plate (13). Each mounting plate (13) cooperates with the corresponding placement platform (10).

4. The novel excavator cab tilting mechanism with shock absorption according to claim 3, characterized in that: The bushing damping mechanism includes a damping groove (14) opened on the flip rocker arm (8), and a bushing damper (15) is provided in the damping groove (14). The bushing damper (15) is a hollow cylindrical shape and is sleeved on the outer circumference of the flip pin (9).

5. The novel excavator cab tilting mechanism with shock absorption according to claim 3, characterized in that: Each of the cab shock absorbers (12) is a bell-shaped shock absorber.

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