An excavating arm

Abstract

A digging arm, whose pivot seat includes a disc, a seat body, a main plate, a sub-plate, an inner ring, a stopper, and a placement portion, wherein the sub-plate includes a plate body and an outer ring portion; the seat body is arranged on the disc, a plate portion is respectively provided at both ends of the seat body, an inner ring is provided on each plate portion, the inner ring is spaced apart from the disc, a main plate is respectively provided at both sides of the seat body, a sub-plate is detachably attached to the outer side of each main plate, the plate body of the sub-plate includes at least two arc surfaces, the lower end of the plate body of the sub-plate is connected to the outer ring portion, the thickness of the outer ring portion is greater than the thickness of the inner ring, the stopper is connected to the outer ring portion, and the stopper can also be detachably connected to the inner ring, a placement portion is attached to the outer side of the main plate, and the placement portion is located below the sub-plate.

Description

Technical Field

[0001] The present invention relates to the field of excavators, and in particular to an excavating arm. Background Art

[0002] With my country's rapid economic development, the demand for railway tunnel construction is increasing. In addition to the commonly used shield tunneling machines (TBMs), the market is also seeing a surge in demand for bucket-type TBMs for non-explosive excavation. The application of construction machinery is crucial and important in today's mechanical construction sector, particularly in industrial and civil construction, water conservancy and hydropower projects, farmland reconstruction projects, oilfield and port infrastructure development, transportation networks, mining operations, and a range of modern military projects. These projects generally rely on a range of high-performance machinery, including but not limited to tunneling equipment, loaders, and tower cranes, to ensure efficiency, quality, and safety. TBMs, due to their high level of technological integration, versatile functionality, high efficiency, robust operational capabilities, and wide range of applications, significantly reduce the physical burden on workers, while also reducing construction costs and ensuring timely and quality completion. Consequently, hydraulic TBMs are playing an increasingly important role in construction.

[0003] In actual engineering practice, the following problems exist:

[0004] 1. Excavators of the prior art, in which the arm performs a bending action to dig deeper (such as the present invention) Figure 3 ) When the actuator moves, a large torque is generated, which will cause a large load on related components, thereby reducing stability and shortening service life.

[0005] Second, in the prior art excavator, there are multiple pivot shafts, and when the corresponding pivot holes are worn, they are difficult to replace and maintain because the pivot holes are connected to the base and other components as a whole.

[0006] 3. Excavators in the prior art require different digging angles under different working conditions, for example Figure 1 In the case of excavation in a horizontal position such as a tunnel or wall, the arm is set in a relatively horizontal position, as shown in FIG. Figure 3 The working condition of the curved arm excavating the ground is shown, and the arm is set in a relatively curved position; the requirements under different working conditions are different. Figure 1 The working conditions shown require a more stable load-bearing capacity. Figure 3 The operating conditions shown need to be more flexible; there is a lack of a simple means of switching requirements when switching to another operating condition after maintaining the same operating condition for a long time. Summary of the Invention

[0007] In order to overcome the above problems, the present invention proposes a solution to solve the above multiple problems at the same time.

[0008] The technical solution adopted by the present invention to solve its technical problem is: an excavating arm, comprising a pivot seat, a first oil cylinder, a first arm, a seat frame, a second oil cylinder, a connecting seat, a third oil cylinder, an outer cover, a second arm, a swing arm, a transmission rod, a third arm, an excavating head, and a telescopic cylinder; the first arm and the first oil cylinder are pivotally connected to the pivot seat; the upper end of the first oil cylinder is connected to the first arm; the upper end of the first arm is connected to the seat frame, the seat frame is pivotally connected to the second oil cylinder and the connecting seat, the upper end of the second oil cylinder is connected to the connecting seat, the connecting seat is provided with the second arm, the connecting seat is connected to the third oil cylinder, the end of the third oil cylinder is connected to the second arm, and the upper end of the second arm is provided with the outer cover; one end of the swing arm is connected to the second arm, the other end of the swing arm is connected to one end of the transmission rod, the other end of the transmission rod is connected to the third arm, the second arm and the third arm are pivotally connected; the excavating head is provided on the third arm;

[0009] The pivot seat comprises a disc, a seat body, a main plate, a sub-plate, an inner ring, a stopper, and a placement portion, the sub-plate comprising a plate body and an outer ring portion; the seat body is arranged on the disc, a plate portion is respectively provided at each end of the seat body, an inner ring is provided on each plate portion, the inner ring is spaced apart from the disc, a main plate is respectively provided at both sides of the seat body, and a sub-plate is detachably attached to the outer side of each main plate, the plate body of the sub-plate comprises at least two arc surfaces, the lower end of the plate body of the sub-plate is connected to the outer ring portion, the thickness of the outer ring portion is greater than the thickness of the inner ring, the stopper is connected to the outer ring portion, the stopper is also detachably connected to the inner ring, a placement portion is attached to the outer side of the main plate, and the placement portion is located below the sub-plate;

[0010] The excavating arm also includes a triangular block, which is attached to the rear of the outer cover and is also connected to the rear end of the second arm. A top plate is provided above the outer cover, and a limiting portion is provided inside the outer cover. An adjustment portion is detachably connected above the limiting portion, and an opening is provided in the front of the outer cover. The adjustment portion can be placed into the outer cover through the opening; the telescopic cylinder passes through the opening and one end is fixed inside the outer cover, and the execution end of the telescopic cylinder drives the transmission rod to move.

[0011] Preferably, the stopper is detachably connected to the outer ring portion.

[0012] Preferably, the top plate comprises a curved surface.

[0013] Preferably, the number of the rocker rods is two.

[0014] Preferably, a connecting shaft is provided between the two rocker arms.

[0015] Preferably, the transmission rod is connected to the connecting shaft.

[0016] Preferably, the execution end of the telescopic cylinder is connected to the connecting shaft.

[0017] Preferably, the execution end of the telescopic cylinder drives the transmission rod to move through the connecting shaft.

[0018] Preferably, the seat body includes a fixing block.

[0019] Preferably, one plate portion is provided at each end of the fixing block.

[0020] The beneficial effects of the present invention are:

[0021] Invention point 1: Regarding the first point raised in the background technology, the technical means adopted is: in the prior art, a pivot seat is generally provided on the base of the excavator for connecting the bottom of the hydraulic cylinder. Invention point 1 sets a block in the pivot seat to limit the pivot angle of the main oil cylinder, thereby providing more stable support to resist the larger torque caused by the bending action.

[0022] At the same time, a series of blocks of different sizes are set up to adapt to different limit angles, and a placement portion is further set on the support to place blocks of different sizes, so that there is no need to go to the tool library to find blocks of different specifications, which facilitates quick replacement at the construction site.

[0023] Point 2 of the invention: In response to the first point raised in the background technology, the second technical means adopted is: in the existing technology, the telescopic cylinder generally pivots at one position, and the force it provides to the entire arm also comes from one point. Point 2 of the invention is to disperse the force or torque provided by this one point to multiple components. When the excavating arm digs deep and swings the head, the force is more evenly dispersed through the triangular blocks, thereby providing a more stable and stronger structure.

[0024] Invention point three, in response to the second point raised in the background technology, the pivot seats in the prior art are all set on the base, and the present invention lifts the pivot seat away from the base to provide a larger disassembly and assembly space; at the same time, the pivot seat that is not easy to disassemble and assemble is decomposed into a fixed part and a disassembly part, and the disassembly part can be directly disassembled during disassembly; in addition, the wear when the shaft and the shaft hole are matched is mostly caused by the skewness of the shaft, so the wear of the shaft hole occurs at the outer edge of the shaft hole, so the invention point three sets the disassembly and assembly part on the outside of the corresponding shaft hole, and when wear occurs, the wear position is located in the hole on the plate body of the sub-plate, and only the sub-plate needs to be disassembled and replaced, which is convenient for disassembly and assembly.

[0025] Invention point four, in response to the first and second points raised in the background technology (i.e., invention point one and invention point three), invention point four makes an organic combination, and integrates the stop block mentioned in invention point one and the disassembly and assembly part (sub-plate) mentioned in invention point three through the overall structure, so that the stop block and the disassembly and assembly part form an organic whole, making the structure simpler, and realizing the functions of two parts through one component; at the same time, through the setting of the sub-plate, the strength of the main board is enhanced; in addition, through the setting of the outer plate, it can be directly connected to the circular ring on the pivot seat (in the prior art, only half of the ring can be connected to the plate, such as the fixed part, and a whole ring cannot be formed), thereby enhancing the strength and thickness of the pivot seat, and thus integrating four functions through one component.

[0026] Point 5 of the invention: In response to the third point raised in the background technology, an adjustment part is provided under the telescopic cylinder to adjust the support height below the cylinder. After the adjustment part is raised, better support force can be provided for the cylinder. After the adjustment part is removed, a larger space can be provided for the cylinder to rotate flexibly, thereby providing a structure that is convenient for adjustment and easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and examples.

[0028] Figure 1 It is a schematic diagram of the first state of the excavating device of the present invention.

[0029] Figure 2 It is a schematic diagram of the second state of the excavating device of the present invention.

[0030] Figure 3 This is a schematic diagram of the third state of the excavating device of the present invention.

[0031] Figure 4 This is a structural detail diagram of the excavation device of the present invention.

[0032] Figure 5 It is a three-dimensional diagram of the pivot seat of the present invention.

[0033] Figure 6 This is a schematic diagram of the upper middle arm portion of the present invention

[0034] Figure 7 This is a three-dimensional diagram of the arm part of the present invention

[0035] In the figures, the reference numerals are as follows:

[0036] 1. Cockpit; 2. Pivot seat; 3. First cylinder; 4. First arm; 5. Seat; 6. Second cylinder; 7. Connecting seat; 8. Third cylinder; 9. Outer cover; 10. Second arm; 11. Rocker arm; 12. Transmission rod; 13. Third arm; 14. Excavator head; 15. Bucket tooth; 16. Telescopic cylinder; 17. Disc; 18. Seat body; 19. Main board; 20. Plate body; 21. Inner ring; 22. Stop block; 23. Outer ring; 24. Triangular block; 25. Top plate; 26. Limiting part; 27. Adjusting part; 28. Opening; 29. ​​Placement part. DETAILED DESCRIPTION

[0037] As shown in the figure: an excavating arm includes a pivot seat, a first oil cylinder, a first arm, a seat frame, a second oil cylinder, a connecting seat, a third oil cylinder, an outer cover, a second arm, a swing arm, a transmission rod, a third arm, an excavating head, and a telescopic cylinder; the first arm and the first oil cylinder are pivotally connected to the pivot seat; the upper end of the first oil cylinder is connected to the first arm; the upper end of the first arm is connected to the seat frame, the second oil cylinder and the connecting seat are pivotally connected on the seat frame, the upper end of the second oil cylinder is connected to the connecting seat, the second arm is provided on the connecting seat, the third oil cylinder is connected to the connecting seat, the end of the third oil cylinder is connected to the second arm, and the upper end of the second arm is provided with the outer cover; one end of the swing arm is connected to the second arm, the other end of the swing arm is connected to one end of the transmission rod, the other end of the transmission rod is connected to the third arm, the second arm and the third arm are pivotally connected; the excavating head is provided on the third arm;

[0038] The pivot seat comprises a disc, a seat body, a main plate, a sub-plate, an inner ring, a stopper, and a placement portion, the sub-plate comprising a plate body and an outer ring portion; the seat body is arranged on the disc, a plate portion is respectively provided at each end of the seat body, an inner ring is provided on each plate portion, the inner ring is spaced apart from the disc, a main plate is respectively provided at both sides of the seat body, and a sub-plate is detachably attached to the outer side of each main plate, the plate body of the sub-plate comprises at least two arc surfaces, the lower end of the plate body of the sub-plate is connected to the outer ring portion, the thickness of the outer ring portion is greater than the thickness of the inner ring, the stopper is connected to the outer ring portion, the stopper is also detachably connected to the inner ring, a placement portion is attached to the outer side of the main plate, and the placement portion is located below the sub-plate;

[0039] The excavating arm also includes a triangular block, which is attached to the rear of the outer cover and is also connected to the rear end of the second arm. A top plate is provided above the outer cover, and a limiting portion is provided inside the outer cover. An adjustment portion is detachably connected above the limiting portion, and an opening is provided in the front of the outer cover. The adjustment portion can be placed into the outer cover through the opening; the telescopic cylinder passes through the opening and one end is fixed inside the outer cover, and the execution end of the telescopic cylinder drives the transmission rod to move.

[0040] As shown in the figure, the stopper is detachably connected to the outer ring portion. The top plate includes a curved surface. There are two rocker arms. A connecting shaft is provided between the two rocker arms. The transmission rod is connected to the connecting shaft. The actuator end of the telescopic cylinder is connected to the connecting shaft. The actuator end of the telescopic cylinder drives the transmission rod to move via the connecting shaft. The base includes a fixed block. A plate portion is provided at each end of the fixed block.

[0041] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the present invention should be included in the patent scope of this case.

Claims

1. An excavating arm, comprising a pivot seat, a first oil cylinder, a first arm, a seat frame, a second oil cylinder, a connecting seat, a third oil cylinder, an outer cover, a second arm, a swing link, a transmission rod, a third arm, an excavating head, and a telescopic cylinder; the first arm and the first oil cylinder are pivotally connected to the pivot seat; the upper end of the first oil cylinder is connected to the first arm; the upper end of the first arm is connected to the seat frame, the seat frame is pivotally connected to the second oil cylinder and the connecting seat, the upper end of the second oil cylinder is connected to the connecting seat, the connecting seat is provided with the second arm, the connecting seat is connected to the third oil cylinder, the end of the third oil cylinder is connected to the second arm, and the upper end of the second arm is provided with the outer cover; one end of the swing link is connected to the second arm, the other end of the swing link is connected to one end of the transmission rod, the other end of the transmission rod is connected to the third arm, the second arm and the third arm are pivotally connected; the excavating head is provided on the third arm; Its characteristics are: The pivot seat comprises a disc, a seat body, a main plate, a sub-plate, an inner ring, a stopper, and a placement portion, the sub-plate comprising a plate body and an outer ring portion; the seat body is arranged on the disc, a plate portion is respectively provided at each end of the seat body, an inner ring is provided on each plate portion, the inner ring is spaced apart from the disc, a main plate is respectively provided at both sides of the seat body, and a sub-plate is detachably attached to the outer side of each main plate, the plate body of the sub-plate comprises at least two arc surfaces, the lower end of the plate body of the sub-plate is connected to the outer ring portion, the thickness of the outer ring portion is greater than the thickness of the inner ring, the stopper is connected to the outer ring portion, the stopper is also detachably connected to the inner ring, a placement portion is attached to the outer side of the main plate, and the placement portion is located below the sub-plate; The excavating arm also includes a triangular block, which is attached to the rear of the outer cover and is also connected to the rear end of the second arm. A top plate is provided above the outer cover, and a limiting portion is provided inside the outer cover. An adjustment portion is detachably connected above the limiting portion, and an opening is provided in the front of the outer cover. The adjustment portion can be placed into the outer cover through the opening; the telescopic cylinder passes through the opening and one end is fixed inside the outer cover, and the execution end of the telescopic cylinder drives the transmission rod to move.

2. The excavating arm according to claim 1, characterized in that: The stopper is detachably connected to the outer ring portion.

3. The excavating arm according to claim 1, characterized in that: The top plate includes a curved surface.

4. The excavating arm according to claim 1, characterized in that: The number of the rocker rods is two.

5. The excavating arm according to claim 4, characterized in that: A connecting shaft is arranged between the two rocker arms.

6. The excavating arm according to claim 5, characterized in that: The transmission rod is connected to the connecting shaft.

7. The excavating arm according to claim 6, characterized in that: The execution end of the telescopic cylinder is connected to the connecting shaft.

8. The excavating arm according to claim 7, characterized in that: The execution end of the telescopic cylinder drives the transmission rod to move through the connecting shaft.

9. The excavating arm according to claim 1, characterized in that: The seat body includes a fixing block.

10. The excavating arm according to claim 9, characterized in that: The two ends of the fixing block are respectively provided with a plate portion.

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