Construction arm

Abstract

The utility model belongs to the technical field of cantilevers, and relates to a construction arm which comprises a construction arm body and further comprises a rope driver, a pull rope, a connecting base and a positioning assembly, the rope driver is installed on the construction arm, and the rope driver is used for driving the pull rope to be tightened or pulled out; one end of the pull rope is connected with the rope driver, and the other end of the pull rope is connected with the connecting seat; the lower end of the connecting base is provided with a connecting part used for being connected with an external operation tool. The positioning assembly can fix the connecting base to the construction arm body, and the connecting base is prevented from moving in the state that the pull rope is tightened. When the pull rope is tightened under the action of the rope driver, hard connection between the pull rope and an external operation tool can be achieved through the positioning assembly, the rope is lowered through the rope driver, and the external operation tool is flexibly connected with the construction arm through the pull rope.

Description

Technical Field

[0001] The utility model relates to a construction arm and belongs to the technical field of cantilevers. Background Art

[0002] At present, a pile driver is a device that can pick up a pile foundation and drive it into the ground. A pile driver known to the inventor mainly includes a movable vehicle body, an operating arm, and a pile hammer. Among them, the rear end of the operating arm is connected to the movable vehicle body, and the front end of the operating arm is connected to the pin hole of the pile hammer through a pin shaft, forming a rigid connection structure.

[0003] When the pile driver needs to operate in deep water areas (especially at sea), the common method is to install it on a ship, and then the ship carries the pile driver to the operation area. After arrival, the operating arm of the pile driver will move with the pile hammer, move the picked pile foundation to the designated position in the water and start driving the pile. When the wind force is small, the swaying amplitude of the ship is very small, and this slight swaying has little impact on the pile driving operation, so a series of operation processes such as picking up the pile and driving the pile can be successfully completed. However, when the wind force increases, the swaying amplitude of the ship will also increase, which in turn causes the movable vehicle body to sway. Since the operating arm and the pile hammer are directly and firmly connected together through a pin shaft and a pin hole, and the length of the operating arm of the pile driver mostly exceeds 20 meters, the swaying of the rear end of the pile driving arm will cause a greater swaying amount at its front end. When a part of the pile foundation has been driven into the soil, its bottom is fixed relative to the ground, while the upper part is clamped by the pile hammer. At this time, the swaying of the pile driver can easily cause the pile foundation to break, or enlarge the sinking hole of the pile foundation, making the pile foundation unable to be fixed, and even possibly dragging the entire pile driver into the water.

[0004] In another operation technique known to the inventor, a crawler pile driver is used, and the pile hammer is lifted by a steel wire rope to drive the pile. Although this method can drive the pile without being affected by the wind force, it cannot pick up the pile independently and requires an additional auxiliary pile picking mechanism, which not only increases the tonnage of the tugboat but also raises the construction cost.

[0005] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the inventive concept of the utility model, and therefore, it may include information that does not constitute the prior art. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

[0007] The technical solution provided by the present utility model is as follows: A construction arm includes a construction arm body, and further includes a rope drive, a pull rope, a connecting seat, and a positioning component. The rope drive is installed on the construction arm, and the rope drive is used to drive the pull rope to tighten or extend; one end of the pull rope is connected to the rope drive, and the other end of the pull rope is connected to the connecting seat; a connecting portion for connecting an external working tool is provided at the lower end of the connecting seat; the positioning component can lock the connecting seat on the construction arm body to prevent the connecting seat from moving when the pull rope is in a tightened state.

[0008] The technical solution provided by the present utility model has the following beneficial effects compared with the prior art: When the pull rope is tightened under the action of the rope drive, a rigid connection with the external working tool can be achieved through the positioning component, and the pile foundation can be directly picked up and accurately positioned to a predetermined position for operation; when the wind is strong during water operation, the rope can be lowered through the rope drive, and the external working tool is flexibly connected to the construction arm through the pull rope, so that the shaking of the construction arm or the movable vehicle body will not affect the work of the external working tool, thereby avoiding the influence of wind on the operation during water operation.

[0009] On the basis of the above technical solution, the present utility model can also be improved as follows.

[0010] Further, the connecting seat is in the shape of a multi-faceted frustum.

[0011] Further, the positioning component includes a first guiding plate and a second guiding plate. The first guiding plate and the second guiding plate are respectively inclined on the two inner side walls of the construction arm body, and the first guiding plate and the second guiding plate have an inclination angle adapted to the connecting seat.

[0012] The beneficial effect of adopting the above further solution is that when the pull rope is tightened, a huge force is generated. If the connecting seat cannot be reliably fixed, it may cause the shaking or even dropping of the heavy object, resulting in serious accidents. The first guiding plate and the second guiding plate cooperate with the connecting seat in the shape of a multi-faceted frustum to achieve precise guiding and positioning of the connecting seat, that is, not only can it ensure that the connecting seat accurately enters the predetermined position during the tightening process of the pull rope, but also when the pull rope is tightened, the connecting seat can be limited and fixed between the first guiding plate and the second guiding plate.

[0013] Further, a locking pin mechanism is further included. A pin hole is provided on the connecting seat, and the pin hole penetrates through the connecting seat and the construction arm body. The locking pin mechanism includes a pin shaft, and the pin shaft can be inserted into or removed from the pin hole.

[0014] The beneficial effect of adopting the above-mentioned further scheme is that the locking pin mechanism can further enhance the stability of the connection between the connecting seat and the construction arm body. When the pin shaft is inserted into the pin hole, the locking pin mechanism firmly fixes the connecting seat on the construction arm body, avoiding possible displacement or shaking of the connecting seat under strong force. In some working conditions that require a highly stable connection, the locking pin mechanism can ensure that the connecting seat will not loosen due to unexpected circumstances, thereby ensuring the safe progress of the operation; and when the locking pin mechanism unlocks the connecting seat, the rope driver lowers the rope, and can achieve a flexible connection with the external working tool by pulling the rope.

[0015] Furthermore, the locking pin mechanism also includes two driving cylinders, a cross bar and a cylinder seat, the cylinder seat is fixed on the construction arm body, the two driving cylinders are respectively arranged on both sides of the construction arm body, the cylinder bodies of the two driving cylinders are installed on the cylinder seat, the cross bar is connected between the telescopic shafts of the two driving cylinders, and the pin shaft is installed on the cross bar.

[0016] The beneficial effect of adopting the above further scheme is that the two driving cylinders are respectively arranged on both sides of the construction arm body and connected by a cross bar, so that the driving force can be evenly distributed on the pin shaft, ensuring the accurate insertion and removal of the pin shaft, and reducing the jamming or deviation caused by uneven force on one side.

[0017] Furthermore, it also includes a tensioning wheel, which is installed on the construction arm body, and the other end of the pull rope is connected to the connecting seat after passing around the tensioning wheel.

[0018] The beneficial effect of adopting the above further scheme is that the tensioning wheel can effectively guide the movement direction of the pull rope, avoiding the pull rope from becoming confused, entangled or deviating from the predetermined track during movement; at the same time, the tensioning wheel can ensure that the pull rope is always in a properly tensioned state, thereby improving the efficiency and stability of the pull rope transmission.

[0019] Furthermore, the rope driver is a winch or a telescopic cylinder.

[0020] The beneficial effect of adopting the above further scheme is that when the requirement of longer rope retraction and release needs to be met, a winch can be used, and the winch can provide more precise rope retraction and release control; when a telescopic cylinder is used, the retraction and release of the pull rope can be achieved by the telescopic action of the cylinder drive shaft, and the telescopic cylinder can provide a larger driving force.

[0021] Furthermore, the connecting portion is a sleeve.

[0022] The beneficial effect of adopting the above further solution is that the connection with the external operating components can be achieved through the sleeve and the pin shaft, which is convenient for disassembly and assembly.

[0023] Further, the construction arm body includes multiple side walls, and the multiple side walls enclose a receiving cavity, and the cable drive is fixed in the receiving cavity.

[0024] The beneficial effect of adopting the above further solution is that fixing the cable drive in the receiving cavity enclosed by multiple side walls can play a good protective role for the cable drive, reduce the damage caused by external factors to it, and at the same time make the structure of the construction arm body more compact, which is beneficial to saving space and optimizing the overall layout.

[0025] Further, a maintenance window is provided on the construction arm body.

[0026] The beneficial effect of adopting the above further solution is that setting a maintenance window on the construction arm body facilitates the inspection, repair and maintenance of the components inside the construction arm. There is no need to disassemble the entire construction arm, saving time and labor costs, improving the efficiency of maintenance work, helping to detect and solve potential problems in a timely manner, and ensuring the normal operation of the equipment. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0028] Figure 1 It is a schematic structural diagram of the construction arm of the present invention;

[0029] Figure 2 It is a schematic structural diagram of the interior of the construction arm of the present invention;

[0030] Figure 3 It is a schematic diagram of the mechanism of the multi-faceted frustum-shaped connecting seat of the present invention in cooperation with the first limiting plate and the second limiting plate;

[0031] Figure 4 It is a schematic structural diagram of the construction arm of the present invention installed on an engineering vehicle;

[0032] Figure 5 It is a schematic structural diagram when the pull rope inside the construction arm of the present invention is pulled out;

[0033] In the figure, 100 is the boom; 200 is the forearm; 300 is the construction arm body; 310 is the inspection window; 400 is the rope drive; 500 is the pull rope; 600 is the connecting seat; 610 is the connecting part; 710 is the first guide plate; 720 is the second guide plate; 800 is the locking pin mechanism; 810 is the pin shaft; 820 is the driving cylinder; 830 is the cross bar; 840 is the cylinder seat; 900 is the tensioning wheel; 1000 is the movable vehicle body; 1100 is the external working tool. Detailed implementation mode

[0034] The principles and features of the present utility model will be described below in conjunction with examples. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0035] As Figure 1 - Figure 3 As shown, a construction arm includes a construction arm body 300, and also includes a rope drive 400, a pull rope 500, a connecting seat 600 and a positioning component. The rope drive 400 is installed on the construction arm body 300. The rope drive 400 is used to drive the pull rope 500 to tighten or pull out. One end of the pull rope 500 is connected to the rope drive 400, and the other end of the pull rope 500 is connected to the connecting seat 600. A connecting part 610 for connecting an external working tool 1100 is provided at the lower end of the connecting seat 600. The positioning component can lock the connecting seat 600 on the construction arm body 300 to prevent the connecting seat 600 from moving when the pull rope 500 is in a tightened state.

[0036] More specifically, in this embodiment, the connecting seat 600 is in the shape of a four-sided frustum. The positioning component includes a first guide plate 710 and a second guide plate 720. The first guide plate 710 and the second guide plate 720 are respectively inclined and arranged on two opposite inner side walls of the construction arm body 300. The first guide plate 710 and the second guide plate 720 have an inclination angle adapted to the connecting seat 600. When the pull rope 500 is tightened, if the connecting seat 600 cannot be reliably fixed, it may cause the heavy object to shake or even fall, resulting in serious accidents. The cooperation between the positioning component and the multi-sided frustum-shaped connecting seat 600 can realize the precise guidance and positioning of the connecting seat 600, that is, not only can ensure that the connecting seat 600 accurately enters the predetermined position during the tightening process of the pull rope 500, but also when the pull rope 500 is tightened, under the combined action of the pull rope 500, the first guide plate 710 and the second guide plate 720, the connecting seat 600 is limited and locked between the first guide plate 710 and the second guide plate 720 to prevent the connecting seat 600 from rotating or moving when the pull rope 500 is in a tightened state.

[0037] The connection seat 600 is in the shape of a four-sided cone, and can be accurately locked on the construction arm body 300 through the first guide plate 710 and the second guide plate 720. Of course, the connection seat 600 can also be in the shape of a three-sided, six-sided or eight-sided cone, and can also be accurately locked.

[0038] The construction arm also includes a locking pin mechanism 800, and a pin hole is provided on the connecting seat 600, and the pin hole passes through the connecting seat 600 and the construction arm body 300. In the present embodiment, the locking pin mechanism 800 includes two driving cylinders 820, a pin shaft 810, a cross bar 830 and a cylinder seat 840, and the cylinder seat 840 is fixed on the construction arm body 300. The two driving cylinders 820 are respectively arranged on both sides of the construction arm body 300, and the cylinder bodies of the two driving cylinders 820 are connected to the cylinder seat 840. The cross bar 830 is connected between the telescopic shafts of the two driving cylinders 820, and the pin shaft 810 is fixed on the cross bar 830, and the axis of the pin shaft 810 is arranged parallel to the telescopic shafts of the two driving cylinders 820. The two driving cylinders 820 are respectively arranged on both sides of the construction arm body 300 and connected by a cross bar 830, so that the driving force can be evenly distributed on the pin shaft 810, ensuring the accurate insertion and removal of the pin shaft 810 from the pin hole, reducing the jamming or deviation caused by the uneven force on one side. The locking pin mechanism 800 can further enhance the stability of the connection between the connecting seat 600 and the construction arm body 300. When the pin shaft 810 is inserted into the pin hole, the locking pin mechanism 800 firmly fixes the connecting seat 600 on the construction arm body 300, avoiding the displacement or shaking of the connecting seat 600 under strong force. In some working conditions requiring a highly stable connection, the locking pin mechanism 800 can ensure that the connecting seat 600 will not loosen due to unexpected circumstances, ensuring the safe operation; and when the locking pin mechanism 800 unlocks the connecting seat 600, the rope driver 400 lowers the rope, and can achieve a flexible connection with the external working tool 1100 through the pull rope 500.

[0039] The construction arm is also provided with a tension wheel 900 for guiding the movement direction of the pull rope 500. The other end of the pull rope 500 passes through the tension wheel 900 and is connected to the connection seat 600. The tension wheel 900 can effectively guide the movement direction of the pull rope 500 to prevent the pull rope 500 from becoming confused, entangled or deviating from the predetermined track during movement; at the same time, the tension wheel 900 can ensure that the pull rope 500 is always in a properly tensioned state, thereby improving the efficiency and stability of the pull rope 500 transmission.

[0040] The embodiments of the present utility model do not limit the type of the rope driver 400, which may be a winch or a telescopic oil cylinder. When it is necessary to meet the requirement of long rope retraction and extension, a winch can be adopted, and the winch can provide more precise control of rope retraction and extension; while when a telescopic oil cylinder is adopted, the retraction and extension of the pull rope 500 can be realized through the telescopic movement of the oil cylinder drive shaft, and the telescopic oil cylinder can provide a large driving force.

[0041] In this embodiment, the connecting portion 610 is a sleeve, and the connection with an external operating component can be achieved through the sleeve and the pin shaft 810, so as to realize the quick installation and disassembly of the external operating tool 1100 and the connection seat 600.

[0042] The construction arm body 300 includes multiple side walls, and the multiple side walls enclose an accommodation cavity. The rope driver 400 is fixed in the accommodation cavity, and an inspection window 310 is provided on the construction arm body 300.

[0043] As Figure 4 and Figure 5 shown, an engineering vehicle includes a movable vehicle body 1000, a boom 100, a forearm 200, a construction arm, and an external operating tool 1100. One end of the boom 100 is installed on the movable vehicle body 1000, the other end of the boom 100 is movably connected to one end of the forearm 200, the other end of the forearm 200 is movably connected to the construction arm, the external operating tool 1100 is connected to the connecting portion 610 at the lower end of the connection seat 600, and the external operating tool 1100 may be a pile hammer, a clamp, or a bucket.

[0044] The working method of using the construction arm of the present utility model for pile driving operation at sea is as follows: When the pulling rope 500 is tightened under the action of the rope driver 400, the first guiding plate 710 and the second guiding plate 720 guide the connecting seat 600 to accurately enter the predetermined position, and finally tightly fit and clamp with the first guiding plate 710 and the second guiding plate 720. The first guiding plate 710 and the second guiding plate 720 form self-locking in the vertical direction and circumferential direction for the connecting seat 600. At this time, the locking pin mechanism 800 is triggered automatically or manually, and the driving cylinder 820 drives the pin shaft 810 to insert through the pin holes of the connecting seat 600 and the construction arm, locking the connecting seat 600 on the construction arm to achieve a rigid connection with the external working tool 1100. The operator manipulates the boom 100, the forearm 200 and the construction arm to move in the cab of the movable vehicle body 1000, pick up the pile foundation from the ground, and accurately position the picked-up pile foundation to the predetermined position for operation. When encountering a situation with strong wind during the construction process, the pin shaft 810 of the locking pin mechanism 800 is moved out of the pin hole to unlock the connecting seat 600, and the pulling rope 500 is lowered through the rope driver 400. The external working tool 1100 is flexibly connected to the construction arm through the pulling rope 500. In this way, even if the construction arm or the movable vehicle body 1000 shakes, it will not affect the work of the external working tool 1100, effectively avoiding the influence of wind on the operation during water operation.

[0045] Using the engineering vehicle of the present utility model, some fine engineering operations can be carried out. First, the connecting seat 600 is fixed by the locking pin mechanism 800 to ensure that the external working tool 1100 can accurately reach the predetermined position for operation. After completing specific steps, the connecting seat 600 is unlocked for flexible adjustment, greatly improving the quality and efficiency of the operation.

[0046] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A construction arm, comprising a construction arm body (300), characterized in that: It also includes a rope driver (400), a pull rope (500), a connecting seat (600) and a positioning assembly, wherein the rope driver (400) is installed on the construction arm body (300), and the rope driver (400) is used to drive the pull rope (500) to be tightened or pulled out, one end of the pull rope (500) is connected to the rope driver (400), and the other end of the pull rope (500) is connected to the connecting seat (600), and the lower end of the connecting seat (600) is provided with a connecting portion (610) for connecting an external working tool (1100), and the positioning assembly can lock the connecting seat (600) on the construction arm body (300) to prevent the connecting seat (600) from moving when the pull rope (500) is tightened.

2. The construction arm according to claim 1, characterized in that: The connecting seat (600) is in the shape of a multi-faceted frustum.

3. The construction arm according to claim 2, characterized in that: The positioning assembly comprises a first guide plate (710) and a second guide plate (720), wherein the first guide plate (710) and the second guide plate (720) are respectively arranged obliquely on the inner side wall of the construction arm body (300), and the first guide plate (710) and the second guide plate (720) have an inclination angle adapted to the connecting seat (600).

4. The construction arm according to claim 1, characterized in that: It also includes a locking pin mechanism (800), wherein a pin hole is provided on the connecting seat (600), and the pin hole passes through the connecting seat (600) and the construction arm body (300), and the locking pin mechanism (800) includes a pin shaft (810), and the pin shaft (810) can be inserted into or removed from the pin hole.

5. The construction arm according to claim 4, characterized in that: The locking pin mechanism (800) comprises two driving cylinders (820), a cross bar (830) and a cylinder seat (840); the cylinder seat (840) is fixed on the construction arm; the two driving cylinders (820) are respectively arranged on both sides of the construction arm; the cylinder bodies of the two driving cylinders (820) are both installed on the cylinder seat (840); the telescopic shafts of the two driving cylinders (820) are connected to the cross bar (830); and the pin shaft (810) is installed on the cross bar (830).

6. The construction arm according to any one of claims 1 to 5, characterized in that: It also includes a tension wheel (900), which is installed on the construction arm body (300). The other end of the pull rope (500) passes around the tension wheel (900) and is connected to the connecting seat (600).

7. The construction arm according to claim 6, characterized in that: The rope driver (400) is a winch or a telescopic cylinder.

8. The construction arm according to claim 7, characterized in that: The connecting portion (610) is a sleeve.

9. The construction arm according to claim 1, characterized in that: The construction arm body (300) comprises a plurality of side walls, and the plurality of side walls enclose a receiving cavity, and the rope driver (400) is fixed in the receiving cavity.

10. The construction arm according to claim 9, characterized in that: The construction arm body (300) is provided with an inspection window (310).

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