Soil transportation device for telescopic arm type excavator

Abstract

The invention provides a soil transportation device for a telescopic arm type excavator, and belongs to the technical field of excavators. The soil transfer system of the present invention comprises: a frame for connecting to a fixed arm of an excavator; the second conveying mechanism is arranged on the rack; the first transmission mechanism is in sliding connection with the second transmission mechanism and is connected with a telescopic arm of the excavator through a connecting chain; the soil conveying device is arranged on the first conveying mechanism and the second conveying mechanism; a first baffle is arranged on the first conveying mechanism, and a second baffle is arranged on the second conveying mechanism. The first baffle is provided with a pulley, and the second baffle is provided with a slide way in sliding connection with the pulley. The first conveying mechanism is connected with the telescopic arm of the excavator through the connecting chain, the first conveying mechanism does not move any more when reaching the limiting position, and due to the fact that the chain is connected with the telescopic arm and can move forwards, it is guaranteed that normal excavation of the excavator cannot be affected by the conveying device.

Description

Technical Field

[0001] The present invention relates to the technical field of excavators, and particularly to a soil transportation device for a telescopic boom excavator and an excavator including the soil transportation device. Background Art

[0002] A telescopic boom excavator is a construction machinery equipped with a telescopic excavation device. The length of the boom is adjusted by hydraulic drive, breaking through the limitation of the fixed boom length of traditional excavators. It has become a special machine suitable for deep excavation operations such as pipe gallery construction, subway construction, river dredging, and trench excavation during war times. It has higher working efficiency than traditional excavators in narrow working environments and can adapt to more complex working environments.

[0003] In the invention patent with the publication number: CN113235678A previously applied by the inventor, a soil transportation device for a telescopic boom excavator and a telescopic boom excavator are disclosed. One end of a sleeve is connected to the telescopic boom, and the other end is connected to one end of a connecting rod. The other end of the connecting rod is connected to a first transmission mechanism. After the first transmission mechanism moves to the extreme position to the left, the telescopic boom cannot move forward further, resulting in the excavator being unable to perform excavation work.

[0004] For this reason, the inventor made improvements on the basis of this invention patent. Summary of the Invention

[0005] In view of this, to solve the technical problem in the prior art that after the first transmission mechanism moves to the extreme position to the left, the telescopic boom cannot move forward further, resulting in the excavator being unable to perform excavation work. On the one hand, the present invention provides a soil transportation device for a telescopic boom excavator, which is connected to the telescopic boom of the excavator through a connecting chain. When the first transmission mechanism reaches the extreme position, the first transmission mechanism stops moving. Since the chain is connected to the telescopic boom and can still move forward, this ensures that the transmission device does not affect the normal excavation of the excavator.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A soil transportation device for a telescopic boom excavator, comprising:

[0008] A frame for connecting to the fixed boom of the excavator;

[0009] A second transmission mechanism disposed on the frame;

[0010] A first transmission mechanism slidably connected to the second transmission mechanism and connected to the telescopic boom of the excavator through a connecting chain;

[0011] The soil conveying device is arranged on the first transmission mechanism and the second transmission mechanism;

[0012] A first baffle is arranged on the first transmission mechanism, and a second baffle is arranged on the second transmission mechanism;

[0013] Pulleys are arranged on the first baffle, and sliding grooves for slidably connecting with the pulleys are formed on the second baffle.

[0014] Preferably, the soil conveying device includes a fixing part, a follower part, a driving device and a conveyor belt;

[0015] The follower part includes:

[0016] A first pulley shaft, which is connected to the left end of the telescopic arm and is located below the bucket of the excavator;

[0017] A first tension pulley shaft, which is located on the right side of the first pulley shaft and is connected to the telescopic arm;

[0018] The fixing part includes:

[0019] A second pulley shaft, which is connected below the fixed arm;

[0020] A third pulley shaft, which is located on the right side of the second pulley shaft and is connected below the fixed arm;

[0021] A second tension pulley shaft, which is located on the left side of the third pulley shaft and is connected below the fixed arm;

[0022] A fourth pulley shaft, which is located below the third pulley shaft and is connected below the fixed arm;

[0023] The conveyor belt sequentially bypasses the third pulley shaft, the second tension pulley shaft, the fourth pulley shaft, the second pulley shaft, the first tension pulley shaft and the first pulley shaft;

[0024] The output end of the driving device is connected to the third pulley shaft for driving the conveyor belt to rotate to realize the transportation of soil from front to back.

[0025] Preferably, a flow guide plate is arranged at the front end of the first transmission mechanism.

[0026] Preferably, a discharge chute is further fixed behind the flow guide plate.

[0027] Preferably, the frame includes:

[0028] A fixed sleeve, one end of which is sleeved on the fixed arm;

[0029] A connecting rod, one end of which is fixed on the second baffle, and the other end of which is hinged to the other end of the fixed sleeve.

[0030] On the other hand, the present invention also provides an excavator, which includes an excavator body and the above-mentioned soil transportation device for telescopic boom excavators.

[0031] The principle of the above-mentioned soil transportation device provided by the present invention is as follows:

[0032] The first pulley shaft and the first tight belt pulley shaft are fixed to the first transmission mechanism. The first transmission mechanism is connected to the telescopic boom of the excavator through a chain. When the telescopic boom extends, it will drive the first transmission mechanism to extend through the chain, and the first pulley shaft and the first tight belt pulley shaft will move forward along with the first transmission mechanism; the second pulley shaft, the second tight belt pulley shaft, the third pulley shaft, and the fourth pulley shaft are fixed to the second transmission mechanism, and the second transmission mechanism is fixed under the fixed arm through a frame and a sleeve and will not move. Thus, the extension and retraction of the transmission mechanism are realized.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The soil transportation device for telescopic boom excavators provided by the present invention is connected to the telescopic boom of the excavator through a connecting chain. When the first transmission mechanism reaches the limit position, the first transmission mechanism will no longer move. Since the chain is connected to the telescopic boom and can still move forward, this ensures that the transmission device will not affect the normal excavation of the excavator. The specific advantages are as follows:

[0035] (1) Does not affect the normal operation of the excavator

[0036] Independent movement: When the first transmission mechanism reaches the limit position, although the transmission mechanism stops moving, the telescopic boom can still continue to move forward. This ensures that the normal excavation operation of the excavator is not restricted by the transmission system.

[0037] Flexibility: The independent movement of the telescopic boom enables the excavator to operate flexibly in various complex terrains and working conditions, improving the work efficiency.

[0038] (2) Improves work efficiency

[0039] During the operation of a traditional telescopic boom excavator, the operator must wait until the bucket is filled with soil and then perform a series of actions: first retract the entire working device, then rotate to unload the soil. After the soil is unloaded, rotate back to the initial excavation position and then continue the excavation operation. This series of actions needs to be repeated, forming a cycle.

[0040] In contrast, by setting up an innovative soil transfer device, the entire working device no longer needs to perform a slewing action during the excavation process. Such a design significantly improves the efficiency of the excavation operation because it reduces the downtime caused by slewing, enabling the excavation and soil unloading processes to proceed more continuously and smoothly.

[0041] (3) Enhance safety

[0042] Reduce the risk of failure: The independent movement design of the transfer system and the telescopic arm reduces the risk of mechanical failure caused by excessive pulling force, improving the reliability and safety of the system.

[0043] Avoid jamming: When the first transfer mechanism reaches the limit position, the continuous movement of the telescopic arm will not generate additional pulling force on the transfer device, avoiding potential safety hazards caused by jamming or overload.

[0044] (4) Optimize resource utilization

[0045] Save labor: The independent movement design of the transfer system and the telescopic arm reduces the intervention of operators and lowers the labor cost.

[0046] Reduce energy consumption: Since the transfer system and the excavation operation can be carried out synchronously, the time for slewing and unloading soil is reduced, thereby reducing energy consumption.

[0047] (5) Adapt to various working conditions

[0048] Versatility: This design enables the excavator to maintain an efficient working state under different working conditions. Whether it is leveling the land, excavating ditches or transporting materials, it can handle them easily.

[0049] Flexibility: The design of the transfer system can be adjusted according to different working conditions to adapt to various complex construction environments.

[0050] The present invention uses the cooperation of pulleys and slides instead of the cooperation of sliders and chutes in the invention with the publication number: CN113235678A, and has the following advantages:

[0051] (1) Reduce frictional resistance

[0052] Pulleys and slides: When the pulleys roll on the slides, mainly rolling friction is generated, and the frictional resistance is small.

[0053] Sliders and chutes: When the sliders slide in the chutes, mainly sliding friction is generated, and the frictional resistance is large.

[0054] Advantage: The cooperation of pulleys and slides can significantly reduce the frictional resistance and improve the operating efficiency of the system.

[0055] (2) Improve motion accuracy

[0056] Pulleys and slides: The pulleys are usually designed more precisely to ensure precise movement on the slides, reducing deviation and wobbling.

[0057] Sliders and chutes: The movement of the sliders in the chutes may be affected by manufacturing tolerances and wear, resulting in a decrease in movement precision.

[0058] Advantages: The cooperation of pulleys and slides can improve the movement precision of the system, ensuring the stability and reliability of the transmission mechanism.

[0059] (3) Extend service life

[0060] Pulleys and slides: The materials of pulleys and slides are usually specially treated and made of materials with high wear resistance and corrosion resistance, such as steel, aluminum alloy or engineering plastics, which can maintain good performance during long-term use.

[0061] Sliders and chutes: Sliders and chutes are prone to wear during long-term use and require regular maintenance and replacement.

[0062] Advantages: The cooperation of pulleys and slides can extend the service life of the system and reduce maintenance costs.

[0063] (4) Improve load-bearing capacity

[0064] Pulleys and slides: The pulleys are designed to withstand large loads, and by combining multiple pulleys, the load-bearing capacity of the system can be further improved.

[0065] Sliders and chutes: The load-bearing capacity of sliders in chutes is limited and they are easily damaged due to overload.

[0066] Advantages: The cooperation of pulleys and slides can improve the load-bearing capacity of the system and meet the requirements of heavier loads.

[0067] (5) Reduce noise

[0068] Pulleys and slides: The noise generated when the pulleys roll on the slides is small, and the operation is quieter.

[0069] Sliders and chutes: The noise generated when the sliders slide in the chutes is large, especially during high-speed movement.

[0070] Advantages: The cooperation of pulleys and slides can significantly reduce the operating noise of the system and improve the comfort of the working environment. Description of the drawings

[0071] Figure 1 Schematic diagram of the structure of the soil transmission system assembled on the telescopic arm and fixed arm of the excavator;

[0072] Figure 2 Front view of the soil transmission system

[0073] Figure 3 It is an exploded view of the soil transmission system;

[0074] Figure 4 It is a schematic diagram of the sliding connection between the pulley and the slideway;

[0075] Figure 5 It is a schematic diagram of the telescopic arm in the extended state and the first transmission mechanism;

[0076] Figure 6 It is a schematic diagram of the telescopic arm in the retracted state and the first transmission mechanism;

[0077] Figure 7 It is a cross-sectional view of the positional relationship between the conveyor belt, the pulley shaft, the first baffle, and the second baffle;

[0078] Figure 8 It is a comparison diagram of extension and contraction;

[0079] Figure 9 It is a simplified diagram of the positional relationship between the pulley shaft and the conveyor belt in the retracted state;

[0080] Figure 10 It is a simplified diagram of the positional relationship between the pulley shaft and the conveyor belt in the extended state;

[0081] Figure 11 It is a comparison schematic diagram of the positional relationship between the extended and retracted conveyor belts;

[0082] Figure 12 It is a schematic diagram of the structure of the installation position of the pulley shaft;

[0083] Figure 13 It is a schematic diagram of the structure of the installation position of the pulley shaft on the inner side of the first baffle where the present invention is installed;

[0084] In the figure, 1 is the frame; 11 is the fixed sleeve; 12 is the connecting rod; 13 is the large sleeve; 14 is the telescopic arm; 15 is the fixed arm; 2 is the first transmission mechanism; 21 is the first baffle; 22 is the pulley; 23 is the connecting chain; 3 is the second transmission mechanism; 31 is the second baffle; 32 is the slideway; 4 is the deflector; 41 is the discharge chute; 5 is the drive device; 51 is the driving member; 52 is the first pulley shaft; 53 is the first tensioning pulley shaft; 54 is the second pulley shaft; 55 is the second tensioning pulley shaft; 56 is the third pulley shaft; 57 is the fourth pulley shaft; 58 is the conveyor belt. Detailed implementation manners

[0085] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0086] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0087] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0088] The present invention is an improvement based on the invention patent with the publication number CN113235678A. It is connected to the telescopic arm 14 of the excavator through the connecting chain 23, replacing the connection method of the sleeve II and the connecting rod II used in the invention patent with the publication number CN113235678A. The present invention replaces the connection method of the slider and the chute used in the invention patent with the publication number CN113235678A by adopting the sliding connection method of the pulley 22 and the slideway 32. In the present invention, except for the above replacement methods, the rest of the content is all introduced into the present invention. In the present invention, except for the above replacement methods, the connection relationships between the remaining components adopt the connection method of the invention patent with the publication number CN113235678A.

[0089] In the reference numerals of the present invention, the fixed sleeve 11, the large sleeve 13, and the connecting rod respectively correspond to the sleeve II, the sleeve I, and the connecting rod 12II in the invention patent with the publication number CN113235678A. The first baffle 21 and the second baffle 31 in the present invention respectively correspond to the second baffle and the first baffle in the invention patent with the publication number CN113235678A.

[0090] As Figures 1-6As shown in the figure, the present invention provides a soil transportation device for a telescopic boom excavator, including:

[0091] A frame 1, which is used to be connected to the fixed arm 15 of the excavator. For example, it is connected through the following large sleeve 13 and connecting rod 12.

[0092] A second transmission mechanism 3, which is arranged on the frame 1.

[0093] A first transmission mechanism 2, which is slidably connected to the second transmission mechanism 3 and is connected to the telescopic boom 14 of the excavator through a connecting chain 23. For example, one end of the connecting chain 23 is connected to a fixed sleeve 11 fixed on the telescopic boom 14, and the other end is connected to the first transmission mechanism 2.

[0094] A soil conveying device, which is arranged on the first transmission mechanism 2 and the second transmission mechanism 3.

[0095] A first baffle 21 is arranged on the first transmission mechanism 2, and a second baffle 31 is arranged on the second transmission mechanism 3.

[0096] A pulley 22 is arranged on the first baffle 21, and a slideway 32 for slidably connecting with the pulley 22 is opened on the second baffle 31.

[0097] As Figures 7-11 shown, in the present invention, the soil conveying device includes a fixed part, a follower part, a driving device 5 and a conveyor belt 58;

[0098] The follower part includes:

[0099] A first pulley shaft 52, which is connected to the left end of the telescopic boom 14 and is located below the bucket of the excavator;

[0100] A first tension pulley shaft 53, which is located on the right side of the first pulley shaft 52 and is connected to the telescopic boom 14;

[0101] The fixed part includes:

[0102] A second pulley shaft 54, which is connected below the fixed arm 15;

[0103] A third pulley shaft 56, which is located on the right side of the second pulley shaft 54 and is connected below the fixed arm 15;

[0104] A second tension pulley shaft 55, which is located on the left side of the third pulley shaft 56 and is connected below the fixed arm 15;

[0105] A fourth pulley shaft 57, which is located below the third pulley shaft 56 and is connected below the fixed arm 15;

[0106] The conveyor belt 58 sequentially bypasses the third pulley shaft 56, the second tension pulley shaft 55, the fourth pulley shaft 57, the second pulley shaft 54, the first tension pulley shaft 53, and the first pulley shaft 52;

[0107] The output end of the driving device 5 is connected to the third pulley shaft 56 to drive the rotation of the conveyor belt 58 to realize the transportation of soil from front to back. For example, the driving device 5 adopts the driving member 51 in the invention patent with the publication number of CN113235678A.

[0108] The working principle of the present invention is as follows:

[0109] The first pulley shaft 52 and the first tension pulley shaft 53 are fixed to the first transmission mechanism. The first transmission mechanism is connected to the telescopic arm of the excavator through a chain. When the telescopic arm extends, it will drive the first transmission mechanism to extend through the chain. The first pulley shaft 52 and the first tension pulley shaft 53 move forward with the first transmission mechanism; the second pulley shaft 54, the second tension pulley shaft 55, the third pulley shaft 56, and the fourth pulley shaft 57 are fixed to the second transmission mechanism. The second transmission mechanism is fixed under the fixed arm through a frame and a sleeve and will not move. Thus, the extension and retraction of the transmission mechanism are realized (as Figures 9-11 shown).

[0110] As Figure 12 shown, it should be noted that the third pulley shaft 56, as the driving pulley shaft, is directly driven by the driving device 5, which can better drive the conveyor belt 58. Compared with the prior art, it has the following advantages:

[0111] First, it is compact and efficient: The device realizes the efficient transportation of soil from front to back through the ingenious combination of the fixed part, the follower part, the driving device, and the conveyor belt. The connection between each component is tight and the structure is compact, making the whole device more stable and reliable during operation.

[0112] Second, it has strong adaptability: The design of the follower part enables the device to flexibly adapt to the soil conveying requirements of different excavation depths and angles. The connection between the first pulley shaft and the first tension pulley shaft and the telescopic arm enables the conveyor belt to be adjusted according to the position of the bucket of the excavator, thus ensuring the continuity and stability of soil transportation.

[0113] Third, the driving method is advanced: Adopting the driving member in the invention patent with the publication number of CN113235678A as the driving device makes the device more efficient and energy-saving when driving the conveyor belt to rotate. At the same time, the third pulley shaft, as the driving pulley shaft, is directly driven by the driving device, reducing the loss in the power transmission process and improving the transmission efficiency of the whole device.

[0114] IV. Easy to maintain: The device is reasonably structured, and the connection and disassembly between components are relatively simple, facilitating daily maintenance and upkeep. This can not only extend the service life of the device but also reduce maintenance costs.

[0115] As Figure 13 shown, in the present invention, since the first round shaft 52 and the first tight belt pulley shaft 53 are located on the first transportation mechanism and are an integral part of the first transportation mechanism, the second belt pulley shaft 54, the second tension belt pulley shaft 55, the third belt pulley shaft 56, and the fourth belt pulley shaft 57 are located on the second transportation mechanism and are an integral part of it. When the first transportation mechanism is driven by a chain by the telescopic arm to extend, the two wheel shafts on the first mechanism also move accordingly, and the remaining three wheel shafts remain in their original positions, thus realizing the internal change of the conveyor belt to make the entire transportation device change from short to long and still be able to transport normally.

[0116] As Figure 1 、 13 shown, in the present invention, a deflector 4 is provided at the front end of the first transmission mechanism 2.

[0117] In the present invention, a discharge chute 41 is also fixed behind the deflector 4.

[0118] In the present invention, the frame 1 includes:

[0119] A fixed sleeve 11, with one end sleeved on the fixed arm 15;

[0120] A connecting rod 12, with one end fixed on the second baffle 31 and the other end hinged to the other end of the fixed sleeve 11. Further, the fixed arm 15 and the frame 1 are connected by a large sleeve 13.

[0121] On the other hand, the present invention also provides an excavator, including an excavator body and the above-mentioned soil transportation device for a telescopic-arm excavator.

[0122] Except for the above two alternative methods, the positions and connection relationships of the other components of the above-mentioned soil transportation device for a telescopic-arm excavator and the excavator provided by the present invention are the same as those of the components of the invention patent with the publication number CN113235678A, and will not be elaborated here.

[0123] The soil transportation device for a telescopic-arm excavator provided by the present invention is connected to the telescopic arm 14 of the excavator through a connecting chain 23. Compared with the connection method adopted in the invention patent with the publication number CN113235678A, it has the advantages of not affecting the normal operation of the excavator, improving work efficiency, enhancing safety, and adapting to various working conditions.

[0124] By adopting the sliding connection method of the pulley 22 and the slideway 32, compared with the sliding connection method adopted in the invention patent of CN113235678A, it has the advantages of reducing frictional resistance, improving motion accuracy and extending service life.

[0125] The above is only the preferred specific implementation mode of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A soil transport device for a telescopic arm excavator, characterized in that: include: a frame for attachment to a fixed arm of an excavator; A second transmission mechanism is disposed on the frame; A first transmission mechanism is slidably connected to the second transmission mechanism and is connected to the telescopic arm of the excavator via a connecting chain; A soil conveying device, disposed on the first conveying mechanism and the second conveying mechanism; The first transmission mechanism is provided with a first baffle, and the second transmission mechanism is provided with a second baffle; The first baffle plate is provided with a pulley, and the second baffle plate is provided with a slideway slidably connected to the pulley.

2. A soil transport device for a telescopic boom excavator according to claim 1, characterized in that: The soil conveying device comprises a fixed part, a follower part, a driving device and a conveyor belt; The following part comprises: a first pulley shaft connected to the left end of the telescopic arm and located below the bucket of the excavator; A first tensioning pulley shaft, located on the right side of the first pulley shaft and connected to the telescopic arm; The fixing portion comprises: A second pulley shaft connected below the fixed arm; A third pulley shaft, located on the right side of the second pulley shaft and connected below the fixed arm; A second tensioning pulley shaft, located on the left side of the third pulley shaft and connected below the fixed arm; A fourth pulley shaft, located below the third pulley shaft and connected below the fixed arm; The conveyor belt passes through the third pulley shaft, the second tension pulley shaft, the fourth pulley shaft, the second pulley shaft, the first tension pulley shaft and the first pulley shaft in sequence; The output end of the driving device is connected to the third pulley shaft to drive the conveyor belt to rotate to transport the soil from front to back.

3. The soil transport device for a telescopic boom excavator according to claim 1, characterized in that: A guide plate is arranged at the front end of the first transmission mechanism.

4. A soil transport device for a telescopic boom excavator according to claim 3, characterized in that: A discharge chute is also fixed behind the guide plate.

5. A soil transport device for a telescopic boom excavator according to any one of claims 1 to 4, characterized in that: The frame comprises: A fixed sleeve, one end of which is sleeved on the fixed arm; A connecting rod has one end fixed on the second baffle plate and the other end hinged to the other end of the fixing sleeve.

6. An excavator, characterized in that: The invention comprises an excavator body and a soil transport device for a telescopic arm excavator according to any one of claims 1 to 5.

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