Inflatable box type telescopic boom
阅读说明：本技术 一种充气式箱型伸缩臂 (Inflatable box type telescopic boom ) 是由 滕儒民 王欣 张睿 王天堉 樊传平 于 2020-08-06 设计创作，主要内容包括：本发明涉及一种充气式箱型伸缩臂,属于机械装备技术领域,充气式箱型伸缩臂,包括基本臂、变幅液压缸、伸缩液压缸,基本臂的下端与变幅液压缸铰接,其特征在于：第二节臂与基本臂通过布置在伸缩臂外面的伸缩液压缸连接,从而实现伸缩动作,所述的基本臂的上端与伸缩液压缸固连,伸缩液压缸的另一端与第二节臂固连,所述的基本臂通过其上的销孔与下车上的转台相连；与基本臂铰接的变幅液压缸的另一端与转台相连,以实现伸缩臂的变幅动作。与现有技术相比,充气型伸缩臂由于内部充高压气体,因为气体自身的特性,第二节臂受力均匀,在可以省去一些位置加强肋的同时,也可以减小钢板的厚度,大大减少了整个伸缩臂的重量,从而可以提升承载能力。(The invention relates to an inflatable box type telescopic boom, which belongs to the technical field of mechanical equipment and comprises a basic boom, a variable amplitude hydraulic cylinder and a telescopic hydraulic cylinder, wherein the lower end of the basic boom is hinged with the variable amplitude hydraulic cylinder, and the inflatable box type telescopic boom is characterized in that: the second section of arm is connected with the basic arm through a telescopic hydraulic cylinder arranged outside the telescopic arm so as to realize telescopic action, the upper end of the basic arm is fixedly connected with the telescopic hydraulic cylinder, the other end of the telescopic hydraulic cylinder is fixedly connected with the second section of arm, and the basic arm is connected with a rotary table on the lower vehicle through a pin hole on the basic arm; the other end of the amplitude-variable hydraulic cylinder hinged with the basic arm is connected with the rotary table so as to realize the amplitude-variable action of the telescopic arm. Compared with the prior art, the inflatable telescopic boom is filled with high-pressure gas, and due to the characteristics of gas, the second section boom is stressed uniformly, reinforcing ribs at certain positions can be omitted, the thickness of a steel plate can be reduced, the weight of the whole telescopic boom is greatly reduced, and the bearing capacity can be improved.)
1. An inflatable box-type telescopic boom comprises a basic boom (1), a variable amplitude hydraulic cylinder (3), a telescopic hydraulic cylinder (5) and a second section boom (6); the lower end of a basic arm (1) is hinged with a variable amplitude hydraulic cylinder (3), and the variable amplitude hydraulic cylinder is characterized in that a second section arm (6) is connected with the basic arm (1) through a telescopic hydraulic cylinder (5) arranged outside the telescopic arm so as to realize telescopic action, the upper end of the basic arm (1) is fixedly connected with the telescopic hydraulic cylinder (5), the other end of the telescopic hydraulic cylinder (5) is fixedly connected with the second section arm (6), and the basic arm (1) is connected with a rotary table on a lower vehicle through a pin hole (2) on the basic arm; the other end of the amplitude-variable hydraulic cylinder (3) hinged with the basic arm (1) is connected with the rotary table to realize the amplitude-variable action of the telescopic arm; the second arm section (6) is of a hollow inner cavity inflation structure, the second arm section (6) is divided into a second arm section inflation cavity (8) and a second arm section non-inflation section (9), one end of the second arm section (6) is provided with an air supplement device (7), and air supplement is carried out through the air supplement device (7); the lifting hook (4) is connected with the non-inflatable section of the second section arm (6);
a pin hole (2) and a pin shaft are arranged on an ear plate of the basic arm (1) so as to be hinged with a variable amplitude hydraulic cylinder (3) to realize variable amplitude action of the box-shaped arm; the amplitude-variable hydraulic cylinder (3) is connected to a rotary table of the lower vehicle and can horizontally rotate along with the box-type arm.
2. The inflatable box type telescopic arm as claimed in claim 1, wherein the second section arm (6) is of an inner cavity inflation structure and is connected to a root pin shaft of the basic arm (1) through a telescopic hydraulic cylinder (5), and the second section arm (6) is provided with an air supply device (7) which can automatically supply air to maintain a certain pressure when the inner cavity air pressure is detected to be insufficient and send an alarm.
3. The telescopic arm of claim 1 or 2, wherein said air-supply means (7) comprises a pressure monitoring device and an air-charging device.
Technical Field
The invention relates to an inflatable box type telescopic boom, belongs to the technical field of mechanical equipment, and can be applied to a crawler crane with a telescopic boom, an automobile crane, an overhead working truck or similar equipment adopting a telescopic boom frame.
Background
The box type telescopic boom is easy to change in the length of the boom, is widely applied to engineering machinery and port machinery products, and whether the design is reasonable or not directly influences the bearing capacity, the stability of the whole machine, the self weight of the whole machine and the like of equipment. In order to reduce the dead weight of the arm support, a thin wall with the thickness as small as possible is often adopted, a longitudinal rib is arranged in a pressure area of a web plate for improving the buckling stability, or an oblique rib is arranged on the outer side of the web plate, or the section form of the telescopic arm, such as a U-shaped or oval section, is changed. However, these methods are still limited in terms of reduction of the weight, and particularly, the appearance of high-strength steel sheets is a prominent contradiction in that the material properties are sufficiently exhibited and the thickness is reduced, but the buckling stability is also reduced.
Disclosure of Invention
The invention aims to provide an inflatable box-type telescopic arm, which is used for reducing the thickness of a steel plate of the telescopic arm, reducing the self weight, improving the operation performance of equipment, reducing the oil consumption and enhancing the local stability.
The technical scheme of the invention is as follows:
an inflatable box-type telescopic boom comprises a basic boom, a variable amplitude hydraulic cylinder, a telescopic hydraulic cylinder and a second knuckle boom; the lower end of the basic arm is hinged with the amplitude-variable hydraulic cylinder, the second knuckle arm is connected with the basic arm through the telescopic hydraulic cylinder arranged outside the telescopic arm so as to realize telescopic action, the upper end of the basic arm is fixedly connected with the telescopic hydraulic cylinder, the other end of the telescopic hydraulic cylinder is fixedly connected with the second knuckle arm, and the basic arm is connected with a rotary table on a lower vehicle through a pin hole on the basic arm; the other end of the amplitude-variable hydraulic cylinder hinged with the basic arm is connected with the rotary table so as to realize the amplitude-variable action of the telescopic arm. The second arm section is of a hollow inner cavity inflation structure and is divided into a second arm section inflation cavity and a second arm section which is not inflated, and an air supplement device is arranged at one end of the second arm section and used for supplementing air. The lifting hook is connected to the non-inflatable section of the second section arm.
The lug plates of the basic arm are provided with pin holes and pin shafts, so that the lug plates are hinged with the amplitude-variable hydraulic cylinder to realize the amplitude-variable action of the box-type arm. The amplitude-variable hydraulic cylinder is connected to a rotary table of the lower vehicle and can horizontally rotate along with the box-type arm.
The second knuckle arm is of an inner cavity inflation structure and is connected to the root pin shaft of the basic arm through a telescopic hydraulic cylinder, the telescopic hydraulic cylinder acts, and the second knuckle arm extends out. And an air supply device is arranged, and can automatically supply air to maintain a certain pressure when the pressure of the gas in the inner cavity is detected to be insufficient, and an alarm is sent out.
The air supplement device comprises an air pressure monitoring device and an air supplement device.
When the lifting device works, the second section arm inflation cavity is constantly guaranteed to be filled with gas with certain pressure so as to support lifting. Due to the existence of high-pressure gas, the steel plate of the second section arm can be thinner than that of a traditional structure which is not filled with high-pressure gas, so that the self weight of the box-type arm can be reduced, the force of getting off the vehicle can be improved, and the driving oil consumption can be reduced under the condition of ensuring the same operation capacity. The invention reduces the dead weight of the box-type arm, improves the force of getting off the vehicle and reduces the oil consumption during driving. In addition, high-pressure gas is filled, when the bending moment is borne, the stress in the knuckle arm is uniform under the action of the gas, and local instability is not easy to occur.
The invention has the beneficial effects that:
compared with the prior art, the inflatable telescopic boom is filled with high-pressure gas, and due to the characteristics of gas, the second section boom is stressed uniformly, reinforcing ribs at certain positions can be omitted, the thickness of a steel plate can be reduced, the weight of the whole telescopic boom is greatly reduced, and the bearing capacity can be improved.
Drawings
FIG. 1(a) is a front view of the structure of the embodiment of the present invention.
FIG. 1(b) is a top view of the structure of the embodiment of the present invention.
Fig. 2(a) is a front view of the base arm 1 shown in fig. 1.
Fig. 2(b) is a disassembled top view of the base arm 1 shown in fig. 1.
Fig. 3(a) is a front view of the second link arm 6 shown in fig. 1.
Fig. 3(b) is a disassembled plan view of the second knuckle arm 6 shown in fig. 1.
Fig. 4 is a schematic view of the gas replenishing device 7 shown in fig. 1.
In the figure: 1 a base arm; 2, pin holes; 3 variable amplitude hydraulic cylinder; 4, a lifting hook; 5, a telescopic hydraulic cylinder; 6 a second arm; 7 air supply device; 8, a second arm inflation cavity; 9 a second arm non-inflatable section; 10 to connect the ear plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
An inflatable box type telescopic boom comprises a basic boom 1, a luffing hydraulic cylinder 3, a telescopic hydraulic cylinder 5 and a second knuckle boom 6; the lower end of a basic arm 1 is hinged with a variable amplitude hydraulic cylinder 3, a second knuckle arm 6 is connected with the basic arm 1 through a telescopic hydraulic cylinder 5 arranged outside the telescopic arm, so that telescopic action is realized, the upper end of the basic arm 1 is fixedly connected with the telescopic hydraulic cylinder 5, the other end of the telescopic hydraulic cylinder 5 is fixedly connected with the second knuckle arm 6, and the basic arm 1 is connected with a rotary table on a lower vehicle through a
The lug plate of the basic arm 1 is provided with a
The structure that the second section arm 6 is inflated by an inner cavity is similar to a cuboid cavity, the second section arm is connected to the root pin shaft of the basic arm 1 through the telescopic hydraulic cylinder 5, the telescopic hydraulic cylinder 5 acts, and the second section arm 6 extends out. And an air supply device 7 is arranged, and can automatically supply air to maintain a certain pressure when the pressure of the gas in the inner cavity is detected to be insufficient, and send out an alarm. The air supply device 7 comprises an air pressure monitoring device and an air charging device.
As shown in fig. 1, is a front view and a top view of the whole. The two telescopic booms are arranged in such a way that the basic boom 1 is designed in a structure similar to that of the basic boom of a conventional telescopic boom, because the space for containing the next boom is enough when the second boom 6 is retracted, and the volume of an inflation cavity is too small and the effect is not obvious when the basic boom is designed in an inflation structure. The arm body is provided with a variable amplitude hydraulic cylinder 3 and a telescopic hydraulic cylinder 5. Wherein the amplitude-variable hydraulic cylinder 3 is hinged with the lower vehicle turntable and is responsible for amplitude-variable action in the vertical plane of the telescopic boom; the telescopic hydraulic cylinder 5 is hinged with the second section arm 6 and is responsible for the extending and retracting actions of the second section arm 6.
As shown in fig. 2, the base arm 1 is shown in front view and plan view. The
As shown in fig. 3, a front view and a plan view of the second link arm 6 are shown. Wherein 8 is a closed inflation cavity; the head of the second arm (the non-inflation section 9) is connected with the ear plate 10 and the hook 4, so that the requirement of tightness is difficult to ensure, and the second arm is not inflated. And an air supplementing device 7 which comprises an air pressure monitoring device and an air charging device is arranged in the non-air charging section 9. The second arm section 6 can be provided with arm pin holes according to actual requirements, and the pin holes are machined to ensure a closed structure. The quality of the welding seam is strictly ensured when the second section arm is welded.
Fig. 4 is a schematic diagram of the process of air supply. The air supplement device comprises an air pressure monitoring device and an air supplement device (which can be used as an accessory on a vehicle). The air pressure monitoring device detects the air pressure in the high-pressure cavity constantly, compares the air pressure with a rated pressure value, and alarms and stops working if the air pressure is lower than the rated pressure value. Only when the pressure meets the condition, the telescopic operation can be carried out. The connecting valve of the second arm inflation cavity adopts a one-way valve to ensure that gas only can enter but not exit.
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