CN111053995B

CN111053995B - Fire engine cantilever crane device and fire engine

Info

Publication number: CN111053995B
Application number: CN201911417246.8A
Authority: CN
Inventors: 陈志伟; 许伟; 刘恒拓
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2022-03-04
Anticipated expiration: 2039-12-31
Also published as: CN111053995A

Abstract

The invention provides a fire fighting truck arm support device and a fire fighting truck, wherein the fire fighting truck arm support device comprises a knuckle arm assembly; the water delivery pipe assembly is arranged corresponding to the knuckle arm assembly and is connected with the knuckle arm assembly; one end of the tail end arm support is rotatably connected with one end of the knuckle arm assembly; the tail end oil cylinder is arranged on one side of the knuckle arm assembly, one end of the tail end oil cylinder is rotatably connected with the knuckle arm assembly, and the other end of the tail end oil cylinder is rotatably connected with the tail end arm frame so as to drive the tail end arm frame to rotate through the telescopic motion of the tail end oil cylinder; the spray gun assembly is connected to one end, far away from the knuckle arm assembly, of the tail end arm support and communicated with the water delivery pipe assembly, and when the knuckle arm assembly is in a horizontal state, the tail end oil cylinder is located above the knuckle arm assembly. According to the technical scheme, the reaction force of the spray gun assembly is counteracted by using the oil pressure of the rodless cavity of the tail end oil cylinder, so that the stability of the spray gun assembly is enhanced, the reduction of the type of the oil cylinder is facilitated, and the cost is reduced.

Description

Fire engine cantilever crane device and fire engine

Technical Field

The invention relates to the technical field of fire fighting, in particular to a fire fighting truck arm support device and a fire fighting truck.

Background

At present, among the common fire engine cantilever crane device, the end of fire engine cantilever crane device is located to the spray gun, adopt hydraulic cylinder drive cantilever crane end rotation between cantilever crane end and the festival arm subassembly more, but can produce great reverse effort in the spray gun carries out the injection operation in-process, need to offset the produced reverse effort of spray gun through hydraulic cylinder's the pulling force that has the pole intracavity among the current fire engine cantilever crane device, the power that has the pole intracavity can bear is limited, need to adopt the great hydraulic cylinder of model for the normal operation that satisfies the spray gun, the whole size and the weight of fire engine cantilever crane device have been increased, the space that occupies is bigger, the cost is raised simultaneously has been led to.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

Therefore, the invention aims to provide a boom device of a fire fighting truck.

Another object of the present invention is to provide a fire fighting truck.

In order to achieve the above object, a first aspect of the present invention provides a fire fighting truck boom device, including: a knuckle arm assembly; the water delivery pipe assembly is arranged corresponding to the knuckle arm assembly and is connected with the knuckle arm assembly; one end of the tail end arm support is rotatably connected with one end of the knuckle arm assembly; the tail end oil cylinder is arranged on one side of the knuckle arm assembly, one end of the tail end oil cylinder is rotatably connected with the knuckle arm assembly, and the other end of the tail end oil cylinder is rotatably connected with the tail end arm support so as to drive the tail end arm support to rotate through the telescopic motion of the tail end oil cylinder; the spray gun assembly is connected to one end, far away from the knuckle arm assembly, of the tail end arm support and communicated with the water conveying pipe assembly, and when the knuckle arm assembly is in a horizontal state, the tail end oil cylinder is located above the knuckle arm assembly.

According to the technical scheme of the first aspect of the invention, the fire fighting truck arm support device comprises an arm-saving component, a water delivery pipe component, a tail end arm support and a spray gun component. The knuckle arm assembly is used as a base body of the fire fighting truck arm support device and is used for driving the water delivery pipe assembly, the tail end arm support and the spray gun assembly to move. The water delivery pipe assembly is correspondingly arranged with the knuckle arm assembly and is connected with the knuckle arm assembly so as to support the water delivery pipe assembly through the knuckle arm assembly. One end of the tail end arm support is rotatably connected with one end of the knuckle arm assembly, so that the tail end arm support can rotate relative to the knuckle arm assembly. One end of the tail end arm support, which is far away from the knuckle arm assembly, is connected with a spray gun assembly, so that the spray gun assembly can rotate to a target position along with the tail end arm support to spray water. Wherein, the spray gun subassembly is linked together with the raceway subassembly to supply water to the spray gun subassembly through the raceway subassembly. The tail end oil cylinder is arranged on one side of the knuckle arm assembly, the cylinder barrel of the tail end oil cylinder is rotatably connected with the knuckle arm assembly, and the piston rod of the tail end oil cylinder is rotatably connected with the tail end arm support, so that the tail end arm support is driven to rotate relative to the knuckle arm assembly through the telescopic motion of the piston rod of the tail end oil cylinder, and the spray gun assembly is driven to rotate. When the knuckle arm assembly is in a horizontal state through limiting, the tail end oil cylinder is located above the knuckle arm assembly, so that when the spray gun assembly conducts water spraying operation towards the direction, generated reaction force acts on a piston rod of the tail end oil cylinder, the piston rod is enabled to generate a motion trend of inward contraction, at the moment, the reaction force borne by the piston rod is offset through the pressure of hydraulic oil in a rodless cavity of the tail end oil cylinder, and the tail end arm support and the spray gun assembly are enabled to be kept stable. It can be understood that, compare in the pole chamber that has of terminal hydro-cylinder, the hydraulic oil capacity of no pole intracavity is bigger, and the power that can bear correspondingly is also bigger, under the condition that does not influence the atress, the fire engine cantilever crane device in this scheme can adopt the hydraulic cylinder that the model is littleer relatively, is favorable to reducing the space and occupies, reduces the weight of fire engine cantilever crane device, reduce cost. Particularly, when the water spray pressure of the spray gun assembly needs to be improved under special conditions, the reaction force generated by the spray gun assembly is correspondingly increased, and the effect of offsetting the reaction force of the spray gun assembly through the rodless cavity of the tail end oil cylinder is more obvious.

It is emphasized that the jointed arm assembly may be a single jointed arm or a plurality of jointed arms connected in series.

It should be noted that, when the fire engine cantilever crane device is in operating condition, the spray gun subassembly sprays downwards under most circumstances, receives the frequency of ascending reaction effect higher, and the arrangement mode of the terminal hydro-cylinder of this scheme is applicable in the water spray operation of spray gun subassembly under most circumstances.

In addition, the fire engine arm support device in the technical scheme provided by the invention can also have the following additional technical characteristics:

in the technical scheme, when the fire fighting truck arm frame device is in the retraction position, the spray gun of the spray gun assembly faces the lower part of the knuckle arm assembly, and the tail end oil cylinder is positioned above the knuckle arm assembly.

In the technical scheme, when the fire fighting truck boom device is in a retracting position, a spray gun of the spray gun assembly faces the lower part of the boom assembly, the tail end oil cylinder is located above the boom assembly, so that the tail end oil cylinder is located on one side, deviating from the spraying direction of the spray gun assembly, of the boom assembly, when the spray gun assembly conducts water spraying operation downwards, reaction force facing upwards is generated, the tail end boom is driven to rotate upwards under the action of the reaction force, pressure is generated on a piston rod of the tail end oil cylinder, the piston rod is driven to move towards a contracting direction, pressure is formed on the piston rod by hydraulic oil in a rodless cavity of the tail end oil cylinder, the reaction force received by the tail end boom and the spray gun assembly is offset, and the tail end boom and the spray gun assembly are kept stable. In addition, the structural style in the scheme can also utilize the self gravity of the tail end arm support and the spray gun assembly to offset part of the reaction force, and the pressure born by the tail end oil cylinder can be further reduced.

It should be noted that, in the retracted position of the arm support device of the fire fighting truck, the knuckle arm assemblies and the tail end arm support are all in horizontal positions.

In the technical scheme, a first connecting part is arranged on one side, close to the tail end oil cylinder, of the knuckle arm assembly, and a cylinder barrel of the tail end oil cylinder is rotatably connected with the first connecting part; and a second connecting part is arranged at one end of the tail end arm support connected with the knuckle arm assembly, the second connecting part and the first connecting part are positioned at the same side, and a piston rod of the tail end oil cylinder is rotatably connected with the second connecting part.

In the technical scheme, one side of the knuckle arm assembly, which is close to the tail end oil cylinder, is provided with a first connecting part, one end of the tail end arm support, which is connected with the knuckle arm assembly, is provided with a second connecting part, the second connecting part and the first connecting part are positioned on the same side, the cylinder barrel, which is provided with the tail end oil cylinder, is rotatably connected with the first connecting part, and a piston rod of the tail end oil cylinder is rotatably connected with the second connecting part, so that a frame structure with multiple connecting rods is formed among the tail end oil cylinder, the first connecting part, the second connecting part and the knuckle arm assembly, and the tail end arm support and the tail end oil cylinder can rotate conveniently. It can be understood that if the tail end oil cylinder is arranged along the length direction of the knuckle arm assembly, the stretching of the tail end oil cylinder cannot enable the tail end arm support to generate torque.

In the technical scheme, a preset distance exists between a connection point of the tail end oil cylinder and the second connecting part and a connection point of the knuckle arm assembly and the tail end arm frame.

In the technical scheme, the second connecting part is positioned at the side of one end, connected with the knuckle arm assembly, of the tail end arm support, and a preset distance is reserved between the connecting point of the tail end oil cylinder and the second connecting part and the connecting point of the knuckle arm assembly and the tail end arm support, so that the force arm of driving force generated on the tail end arm support when a piston rod of the tail end oil cylinder stretches out and draws back is increased, and the torque of the tail end arm support is increased. Correspondingly, under the condition that the torque is not changed, the driving force required to be provided by the tail end oil cylinder can be reduced by increasing the force arm, and the tail end oil cylinder can be of a relatively small type.

In the above technical scheme, a preset angle is formed between the tail end oil cylinder and the knuckle arm assembly, and when the knuckle arm assembly is in a horizontal state, the preset angle is a positive angle.

In the technical scheme, an angle is formed and established between the tail end oil cylinder and the knuckle arm assembly, and when the knuckle arm assembly is in a horizontal state, the preset angle is a positive angle, at the moment, the height of the second connecting part is larger than that of the first connecting part in the vertical direction, so that a certain space exists between a piston rod of the tail end oil cylinder and the knuckle arm assembly, and the piston rod of the tail end oil cylinder is prevented from interfering with the knuckle arm assembly when rotating together with the tail end arm frame. It can be understood that when the tail end oil cylinder drives the tail end arm support to rotate in a telescopic mode through the piston rod, the tail end oil cylinder can also rotate in a certain range, if the preset angle is too small, when the piston rod of the tail end oil cylinder contracts, the tail end oil cylinder is easy to interfere with the arm-saving assembly, and if the preset angle is too large, the arm support device of the fire fighting truck can occupy too much space.

In the technical scheme, the horizontal position is taken as a reference, and the tail end arm support can rotate at least within an angle range of-60 degrees to 30 degrees.

In the technical scheme, the horizontal position is defined as a reference, the tail end arm frame can rotate at least within an angle range of minus 60 degrees to 30 degrees, namely, the upward rotating angle of the horizontal position is a positive angle, the downward rotating angle is a negative angle, when the tail end arm frame rotates downwards, the rotating angle is not less than minus 60 degrees, when the horizontal position is upward small, the rotating angle is not less than 30 degrees, the total rotating amplitude is not less than 90 degrees, so that the spray gun assembly arranged on the tail end arm frame can operate towards a plurality of different angles, and the operation range of the spray gun assembly is favorably expanded.

In the above technical solution, the knuckle arm assembly includes: the joint arm assembly comprises a plurality of joint arms which are sequentially connected end to end, and one joint arm positioned at the tail end in the joint arm assembly is rotatably connected with the tail end arm frame.

In the technical scheme, the knuckle arm assembly comprises a plurality of knuckle arms which are sequentially connected end to end, and one knuckle arm positioned at the tail end of the knuckle arm assembly is rotatably connected with the tail end arm support, so that the tail end arm support can rotate relative to the knuckle arm assembly. Through the relative motion between a plurality of festival arms, can further enlarge the radiation area of fire engine cantilever crane device, enlarge the operating range of spray gun subassembly. Alternatively, the two adjacent knuckle arms may be connected in a rotating manner, or may be connected in a sliding manner or in other manners.

The technical scheme of the second aspect of the invention provides a fire fighting truck, which comprises a truck body; the water supply device is arranged in the vehicle body; the fire fighting truck boom device in any one of the above technical solutions of the first aspect is connected to a truck body, and one end of the water delivery pipe assembly of the fire fighting truck boom device, which is far away from the spray gun assembly, is communicated with a water supply device.

According to a second aspect of the present invention, a fire fighting truck comprises a truck body, a water supply device, and the fire fighting truck arm support device of any one of the first aspect of the present invention. The water supply device is arranged in the vehicle body, and the arm support device is connected to the vehicle body so as to load and move the arm support device and the water supply device through the vehicle body. One end, far away from the spray gun assembly, of a water delivery pipe assembly of the fire fighting truck arm support device is communicated with a water supply device, so that water is supplied to the spray gun assembly of the fire fighting truck arm support device through the water supply device, and water is sprayed to a fire site through the spray gun assembly, and fire fighting is achieved. When the spray gun assembly performs water spraying operation, the reaction force of the spray gun assembly is counteracted through the oil pressure of the rodless cavity of the tail end oil cylinder of the fire truck boom device, the characteristic that the capacity of the rodless cavity of the tail end oil cylinder is larger than that of the rod cavity can be utilized, the oil pressure is increased, the stability of the spray gun assembly is favorably kept, and the fire extinguishing efficiency of the fire truck is improved. In addition, the fire engine in this scheme should have all beneficial effects of the fire engine cantilever crane device of any one of the above-mentioned first aspect technical scheme, and no longer give unnecessary details here.

In the above technical solution, the knuckle arm assembly in the arm frame device of the fire engine includes: the knuckle arms are sequentially and rotatably connected end to end, and one knuckle arm positioned at the tail end in the knuckle arm assembly is rotatably connected with the tail end arm support; and two adjacent knuckle arms are respectively and rotatably connected with a cylinder barrel and a piston rod of the same hydraulic oil cylinder so as to drive the knuckle arms to rotate through the hydraulic oil cylinders, wherein when the fire fighting truck arm support device is in a folded state, a spray gun of the spray gun assembly faces the lower part of the knuckle arm assembly, and the tail end oil cylinder is positioned above the knuckle arm assembly.

In the technical scheme, the adjacent two section arms are rotatably connected, and one section arm positioned at the tail end in the section arm assembly is rotatably connected with the tail end arm support, so that each section arm of the section arm assembly can rotate, and the arm support device of the fire fighting truck can be unfolded or folded. A hydraulic oil cylinder is arranged between two adjacent knuckle arms, and a cylinder barrel and a piston rod of the hydraulic oil cylinder are respectively and rotatably connected with the two adjacent knuckle arms to drive the knuckle arms to rotate, so that driving force is provided for unfolding or folding and folding the arm support device of the fire fighting truck, and the operation range of the arm support device of the fire fighting truck is further enlarged. When the arm support device of the fire fighting truck is in a folded state, the multiple knuckle arms are mutually folded and are in a horizontal placement state, at the moment, the spray gun of the spray gun assembly faces the lower part of the knuckle arm assembly, and the tail end oil cylinder is located above the knuckle arm assembly, so that the reaction force applied to the spray gun assembly during spraying acts on a piston rod of the tail end oil cylinder, and the piston rod generates an inward contraction movement trend. Alternatively, the number of the nodal arms is 3 to 7, and further, the number of the nodal arms is 5.

In the technical scheme, the mounting base is fixedly connected to the vehicle body, the knuckle arm at one end of the knuckle arm assembly, which is far away from the tail end arm support, is rotatably connected with the mounting base, and the mounting base and the knuckle arm connected with the mounting base are respectively rotatably connected with a cylinder barrel and a piston rod of the same hydraulic oil cylinder.

In the technical scheme, the installation base is fixedly arranged on the vehicle body, and one end, far away from the tail end arm support, of the arm joint component is rotatably connected with the installation base, so that the installation base serves as a base of the arm joint component to support the arm joint component, and the installation connection between the arm joint device of the fire truck and the fire truck is realized through the installation base. Specifically, the knuckle arm at the head end is rotatably connected with the mounting base, a hydraulic oil cylinder is arranged between the mounting base and the knuckle arm connected with the mounting base, and a cylinder barrel and a piston rod of the hydraulic oil cylinder are respectively rotatably connected with the mounting base and the knuckle arm connected with the mounting base so as to drive the knuckle arm assembly and the tail end arm frame to rotate relative to the mounting base.

In above-mentioned technical scheme, the fire engine still includes: the angle detector is arranged on the spray gun assembly and used for detecting the spraying angle of the spray gun assembly; and the controller is electrically connected with the angle detector and the fire fighting truck arm support device so as to control the action of the fire fighting truck arm support device according to the angle information detected by the angle detector.

In the technical scheme, the angle detector is arranged on the spray gun assembly to detect the spray angle of the spray gun assembly, so that the spray angle state of the spray gun assembly is accurately known. The controller is arranged and electrically connected with the angle detector and the fire fighting truck arm support device, so that the action of the fire fighting truck arm support device is controlled according to the spraying angle signal of the spray gun assembly detected by the angle detector, the expansion or the retraction is realized, the accurate control of the fire fighting truck arm support device is favorably realized, the operation accuracy of spray gun operation is improved, and the operation efficiency is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram illustrating a boom apparatus of a fire fighting vehicle according to an embodiment of the present invention;

FIG. 2 shows an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of a boom apparatus of a fire fighting vehicle according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a boom apparatus of a fire fighting vehicle according to an embodiment of the present invention;

FIG. 5 shows an enlarged schematic view of portion B of FIG. 4;

FIG. 6 illustrates a partial schematic view of a fire fighting vehicle boom apparatus according to an embodiment of the present invention;

FIG. 7 shows a schematic view of a fire engine according to an embodiment of the invention;

FIG. 8 shows a schematic view of a fire engine according to one embodiment of the invention.

Wherein, the correspondence between the reference numbers and the components in fig. 1 to 8 is as follows:

the device comprises a 1-section arm assembly, a 111 first-section arm, a 112 second-section arm, a 113 third-section arm, a 114 fourth-section arm, a 115 fifth-section arm, a 12 mounting base, a 13 first connecting part, a 2 tail end arm frame, a 21 second connecting part, a 3 tail end oil cylinder, a 4 spray gun assembly and a 5 vehicle body.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A fire fighting vehicle boom apparatus and a fire fighting vehicle according to some embodiments of the present invention are described below with reference to fig. 1 to 8.

Example one

The embodiment provides a boom device of a fire fighting truck, which comprises a knuckle boom assembly 1, a water pipe assembly, a tail end boom 2, a tail end oil cylinder 3 and a spray gun assembly 4, as shown in fig. 1. The knuckle arm assembly 1 is used as a base body of a fire fighting truck arm support device and is used for driving the water delivery pipe assembly, the tail end arm support 2 and the spray gun assembly 4 to move. The water conveying pipe assembly is arranged corresponding to the knuckle arm assembly 1 and is connected with the knuckle arm assembly 1 so as to support the water conveying pipe assembly through the knuckle arm assembly 1. One end of the tail end arm support 2 is rotatably connected with the arm-saving component 1, the spray gun component 4 is connected with one end, far away from the arm-saving component 1, of the tail end arm support 2, and the spray gun component 4 is connected with the water delivery pipe component so as to supply water to the spray gun component 4 through the water delivery pipe component. One end of the knuckle arm assembly 1, which is far away from the tail end arm support 2, is used for being connected with a fire fighting truck, so that the knuckle arm assembly 1 can rotate when being subjected to driving force. The tail end oil cylinder 3 is arranged on one side of the knuckle arm assembly 1, a cylinder barrel of the tail end oil cylinder 3 is rotatably connected with the knuckle arm assembly 1, a piston rod of the tail end oil cylinder 3 is rotatably connected with the tail end arm support 2, and the tail end arm support 2 is driven to rotate relative to the knuckle arm assembly 1 through the telescopic motion of the tail end oil cylinder 3 so as to change the position and the orientation of the spray gun assembly 4. Wherein, when the fire engine cantilever crane device is in the horizontality (as the position shown in fig. 1), knuckle arm subassembly 1 and terminal cantilever crane 2 all place along the level, terminal hydro-cylinder 3 is located knuckle arm subassembly 1's top to when spray gun subassembly 4 sprays water downwards, the reaction force that spray gun subassembly 4 received conducts to the piston rod, make the piston rod have the motion trend of inside shrink, at this moment, the reaction force of spray gun subassembly 4 is offset to the oil hydraulic pressure in the no pole intracavity of terminal hydro-cylinder 3, eliminate the torque that reaction force produced terminal cantilever crane 2, be favorable to keeping spray gun subassembly 4's stability. Wherein the rod-less chamber of the end cylinder 3 has a larger capacity than the rod chamber, so that the end cylinder 3 in this embodiment is arranged in such a manner as to provide a larger oil pressure and thus can withstand a larger reaction force. Under the condition of certain pressure, the oil cylinder with smaller model can be selected, which is beneficial to reducing weight and cost.

It should be noted that the knuckle arm assembly 1 in this embodiment may be a single knuckle arm, or may include multiple knuckle arms. In addition, the spray gun assembly 4 is sprayed downwards in most cases in the working state, the frequency of the upward reaction force is high, and the arrangement mode of the tail end oil cylinder 3 of the embodiment is suitable for the water spraying operation of the spray gun assembly 4 in most cases.

Example two

The embodiment provides a boom device of a fire fighting truck, which comprises a knuckle boom assembly 1, a water pipe assembly, a tail end boom 2, a tail end oil cylinder 3 and a spray gun assembly 4, as shown in fig. 1. The knuckle arm assembly 1 is used as a base body of a fire fighting truck arm support device and is used for driving the water delivery pipe assembly, the tail end arm support 2 and the spray gun assembly 4 to move. The water conveying pipe assembly is arranged corresponding to the knuckle arm assembly 1 and is connected with the knuckle arm assembly 1 so as to support the water conveying pipe assembly through the knuckle arm assembly 1. One end of the tail end arm support 2 is rotatably connected with the arm-saving component 1, the spray gun component 4 is connected with one end, far away from the arm-saving component 1, of the tail end arm support 2, and the spray gun component 4 is connected with the water delivery pipe component so as to supply water to the spray gun component 4 through the water delivery pipe component. One end of the knuckle arm assembly 1, which is far away from the tail end arm support 2, is used for being connected with a fire fighting truck, so that the knuckle arm assembly 1 can rotate when being subjected to driving force. The tail end oil cylinder 3 is arranged on one side of the arm-saving component 1, a cylinder barrel of the tail end oil cylinder 3 is rotatably connected with the arm-saving component 1, and a piston rod of the tail end oil cylinder 3 is rotatably connected with the tail end arm frame 2. The end boom 2 is driven to rotate about the arm assembly 1 by the end cylinder 3 to change the position and orientation of the spray gun assembly 4. Wherein, when the fire engine cantilever crane device is in the horizontality (as the position shown in fig. 1), knuckle arm subassembly 1 and terminal cantilever crane 2 all place along the level, terminal hydro-cylinder 3 is located knuckle arm subassembly 1's top to when spray gun subassembly 4 sprays water downwards, the reaction force that spray gun subassembly 4 received conducts to the piston rod, make the piston rod have the motion trend of inside shrink, at this moment, the reaction force of spray gun subassembly 4 is offset to the oil hydraulic pressure in the no pole intracavity of terminal hydro-cylinder 3, eliminate the torque that reaction force produced terminal cantilever crane 2, be favorable to keeping spray gun subassembly 4's stability. Wherein the rod-less chamber of the end cylinder 3 has a larger capacity than the rod chamber, so that the end cylinder 3 in this embodiment is arranged in such a manner as to provide a larger oil pressure and thus can withstand a larger reaction force. Under the condition of certain pressure, the oil cylinder with smaller model can be selected, which is beneficial to reducing weight and cost.

Specifically, as shown in fig. 2, a first connecting portion 13 is provided on the upper side of the knuckle arm assembly 1 in the horizontal state, and the first connecting portion 13 protrudes upward relative to the knuckle arm assembly 1; a second connecting part 21 is arranged at one end of the tail end arm support 2 connected with the knuckle arm component 1, and the second connecting part 21 and the first connecting part 13 are positioned at the same side; the cylinder barrel of the end cylinder 3 is rotatably connected to the first connecting portion 13, and the piston rod of the end cylinder 3 is rotatably connected to the second connecting portion 21. A preset distance h exists between a connecting point of the second connecting part 21 and a piston rod of the tail end oil cylinder 3 and a connecting point of the knuckle arm component 1 and the tail end arm support 2, a preset angle a is formed between the tail end oil cylinder 3 and the knuckle arm component 1, the tail end arm support 2 and the tail end oil cylinder 3 form a triangular frame structure, and the tail end arm support 2 is driven to rotate relative to the knuckle arm component 1 through telescopic motion of the piston rod of the tail end oil cylinder 3. Optionally, h is more than or equal to 100mm, and a is more than or equal to 5 degrees and less than or equal to 25 degrees.

EXAMPLE III

The embodiment provides a fire engine arm support device, and further improvement is made on the basis of the second embodiment. As shown in fig. 3, the rotation angle range of the end boom 2 is-60 ° to 30 °, that is, the horizontal state of the fire fighting truck boom device is used as a reference (as shown in fig. 3), the upward rotation angle is a positive angle, and the downward rotation angle is a negative angle. When a piston rod of the tail end oil cylinder 3 extends out, the tail end arm support 2 is driven to rotate downwards, the rotating angle is not smaller than minus 60 degrees, when the piston rod of the tail end oil cylinder 3 contracts, the tail end arm support 2 is driven to rotate upwards, and the rotating angle is not smaller than 30 degrees, so that the rotating angle of the tail end arm support 2 is not smaller than 90 degrees. When the boom device of the fire fighting truck is used, the tail end boom 2 can be driven to rotate relative to the knuckle boom assembly 1 through the tail end oil cylinder 3 according to the specific situation of a target position, so that the operation requirement of spray gun operation is met.

Example four

The embodiment provides a boom device of a fire fighting truck, which comprises a knuckle boom assembly 1, a water pipe assembly, a tail end boom 2, a tail end oil cylinder 3 and a spray gun assembly 4, as shown in fig. 4.

The knuckle arm assembly 1 is used as a base body of a fire fighting truck arm support device and is used for driving the water delivery pipe assembly, the tail end arm support 2 and the spray gun assembly 4 to move. The arm assembly 1 comprises a first arm section 111, a second arm section 112, a third arm section 113, a fourth arm section 114 and a fifth arm section 115 which are sequentially and rotatably connected end to end, wherein one end, far away from the second arm section 112, of the first arm section 111 is used for installation and connection, one end, far away from the fourth arm section 114, of the fifth arm section 115 is connected with the tail end arm support 2, and one end, far away from the fifth arm section 115, of the tail end arm support 2 is connected with the spray gun assembly 4. Through the mutual rotation between the knuckle arms, the expansion or folding of the fire engine arm support device can be realized (as shown in the state of figure 4), so that the coverage area of the fire engine arm support device is enlarged when the arm support device is expanded, the operation range of the spray gun assembly 4 is enlarged, and the integral space occupation is reduced by the mutual folding arrangement between the knuckle arms when the arm support device is folded. When the arm support device of the fire fighting truck is in a folded state, the arm joint component 1 and the tail end arm support 2 are in a horizontal state. The raceway assembly includes a plurality of rotatable coupling's raceway, and the raceway corresponds the setting with the festival arm of festival arm subassembly 1 to be connected with the festival arm that corresponds, in order to form the support to the raceway assembly through festival arm subassembly 1. The water conveying pipes are arranged along the two sides of the joint arm component 1 in a staggered mode and connected through bent pipes at the connecting positions of the two water conveying pipes, so that the rotatable connection between the water conveying pipes is achieved. Furthermore, a hydraulic oil cylinder is arranged between the two adjacent knuckle arms, and a cylinder barrel and a piston rod of the hydraulic oil cylinder are respectively and rotatably connected with the two adjacent knuckle arms, so that the knuckle arms are driven to rotate through the telescopic motion of the hydraulic oil cylinder.

The cylinder barrel of the end oil cylinder 3 is rotatably connected with the fifth section arm 115, and the piston rod of the end oil cylinder 3 is rotatably connected with the end arm support 2 so as to drive the end arm support 2 to rotate relative to the fifth section arm 115 through the end oil cylinder 3. When the boom device of the fire fighting truck is in a folded state (as shown in fig. 4), the fifth arm section 115 and the tail end boom 2 are horizontally placed, the spray gun of the spray gun assembly 4 faces downwards, the tail end oil cylinder 3 is located above the fifth arm section 115, the piston rod of the tail end oil cylinder 3 extends out to drive the tail end boom 2 to rotate downwards, and the piston rod contracts to drive the tail end boom 2 to rotate upwards, so that the spray gun assembly 4 is driven to rotate to a target position to perform water spraying operation. When the spray gun assembly 4 performs water spraying operation, the pressure in the rodless cavity of the tail end oil cylinder 3 acts on the tail end arm support 2 through the piston rod so as to counteract the torque generated by the reaction force of the spray gun assembly 4 on the tail end arm support 2, and the stability of the spray gun assembly 4 is favorably maintained. Wherein the rod-less chamber of the end cylinder 3 has a larger capacity than the rod chamber, so that the end cylinder 3 in this embodiment is arranged in such a manner as to provide a larger oil pressure and thus can withstand a larger reaction force. Under the condition of certain pressure, the oil cylinder with smaller model can be selected, which is beneficial to reducing weight and cost.

EXAMPLE five

The fire engine arm support device provided in the embodiment is further improved on the basis of the fourth embodiment. As shown in fig. 5, a first connecting portion 13 is provided on the fifth joint arm 115 on a side close to the end cylinder 3, and the first connecting portion 13 protrudes outward relative to the fifth joint arm 115; a second connecting part 21 is arranged at one end of the tail end arm support 2 connected with the fifth section arm 115, and the second connecting part 21 and the first connecting part 13 are positioned at the same side; the cylinder barrel of the end cylinder 3 is rotatably connected to the first connecting portion 13, and the piston rod of the end cylinder 3 is rotatably connected to the second connecting portion 21. A preset distance m exists between a connection point of the second connection part 21 and a piston rod of the tail end oil cylinder 3 and a connection point of the arm joint component 1 and the tail end arm support 2, and a preset angle b is formed between the tail end oil cylinder 3 and the fifth arm joint 115, so that the fifth arm joint 115, the tail end arm support 2 and the tail end oil cylinder 3 form a triangular frame structure, and the tail end arm support 2 is driven to rotate relative to the fifth arm joint 115 through the telescopic motion of the piston rod of the tail end oil cylinder 3. Optionally, m is more than or equal to 100mm, and b is more than or equal to 5 degrees and less than or equal to 25 degrees.

Further, as shown in fig. 6, the rotation angle range of the end arm frame 2 is-60 ° to 30 °, that is, when the arm frame device of the fire fighting truck is in a folded state, the horizontal position is used as a reference, the upward rotation angle is a positive angle, and the downward rotation angle is a negative angle. When a piston rod of the tail end oil cylinder 3 extends out, the tail end arm support 2 is driven to rotate downwards, the rotating angle is not smaller than minus 60 degrees, when the piston rod of the tail end oil cylinder 3 contracts, the tail end arm support 2 is driven to rotate upwards, and the rotating angle is not smaller than 30 degrees, so that the rotating angles of the tail end arm support 2 are not smaller than 90 degrees in total. When the boom device of the fire fighting truck is used, the tail end boom 2 can be driven to rotate relative to the knuckle boom assembly 1 through the tail end oil cylinder 3 according to the specific situation of a target position, so that the operation requirement of spray gun operation is met.

EXAMPLE six

In the present embodiment, a fire fighting truck is provided, as shown in fig. 7, the fire fighting truck includes a truck body 5, a water supply device, and a boom device of the fire fighting truck in any one of the first to fifth embodiments. Wherein, water supply installation locates in automobile body 5, and fire engine cantilever crane device connects on automobile body 5 to load and remove water supply installation and fire engine cantilever crane device through automobile body 5. One end of the water delivery pipe assembly of the fire fighting truck arm support device, which is far away from the spray gun assembly 4, is communicated with the water supply device, so that the water supply device supplies water to the spray gun assembly 4 through the water delivery pipe assembly for fire fighting and fighting operation. When the fire engine cantilever crane device is in a furled state (as shown in the position of fig. 7), the knuckle arm component 1 and the tail end cantilever crane 2 are both placed along the horizontal direction, the tail end oil cylinder 3 is positioned above the knuckle arm component 1, when the spray gun component 4 sprays water downwards, the reaction force received by the spray gun component 4 is conducted to the piston rod, so that the piston rod has the motion trend of inward contraction, at the moment, the reaction force of the spray gun component 4 is offset by the oil pressure in the rodless cavity of the tail end oil cylinder 3, larger oil pressure can be provided, larger reaction force can be borne, and the stability of the spray gun component 4 is favorably maintained. In addition, the fire fighting truck in this embodiment should have all the beneficial effects of the boom device of the fire fighting truck in any one of the first to fifth embodiments, which are not described herein again.

EXAMPLE seven

In the present embodiment, a fire fighting truck is provided, as shown in fig. 8, which includes a truck body 5, a water supply device, a mounting base 12, and a fire fighting truck arm support device in the fourth or fifth embodiment.

The water supply device is arranged in the vehicle body 5, and the fire fighting truck arm support device is connected to the vehicle body 5 so as to load and move the water supply device and the fire fighting truck arm support device through the vehicle body 5. One end of the water delivery pipe assembly of the fire fighting truck arm support device, which is far away from the spray gun assembly 4, is communicated with the water supply device, so that the water supply device supplies water to the spray gun assembly 4 through the water delivery pipe assembly for fire fighting and fighting operation.

Specifically, the mounting base 12 is fixedly connected to the vehicle body 5 for connecting the arm frame device of the fire fighting vehicle. The knuckle arm assembly 1 of the fire fighting truck boom device comprises five knuckle arms which are sequentially and rotatably connected end to end, namely a first knuckle arm 111, a second knuckle arm 112, a third knuckle arm 113, a fourth knuckle arm 114 and a fifth knuckle arm 115, wherein one end, far away from the second knuckle arm 112, of the first knuckle arm 111 is rotatably connected with the mounting base 12, one end, far away from the fourth knuckle arm 114, of the fifth knuckle arm 115 is connected with the tail end boom 2, and one end, far away from the fifth knuckle arm 115, of the tail end boom 2 is connected with the spray gun assembly 4. A hydraulic oil cylinder is arranged between the two adjacent knuckle arms, and a cylinder barrel and a piston rod of the hydraulic oil cylinder are respectively and rotatably connected with the two adjacent knuckle arms; a hydraulic oil cylinder is also arranged between the first section arm 111 and the mounting base 12, and a cylinder barrel and a piston rod of the hydraulic oil cylinder are respectively and rotatably connected with the mounting base 12 and the first section arm 111. The knuckle arms are driven to rotate through telescopic movement of the hydraulic oil cylinder, and then expansion or folding of the fire fighting truck boom device is achieved through mutual rotation of the knuckle arms (as shown in a state in figure 8), so that the coverage area of the fire fighting truck boom device is enlarged when the boom device is expanded, the operation range of the spray gun assembly 4 is enlarged, and when the boom device is folded, the space occupation of the whole body is reduced through mutual folding arrangement of the knuckle arms. When the arm support device of the fire fighting truck is in a folded state, the arm joint component 1 and the tail end arm support 2 are in a horizontal state. Terminal hydro-cylinder 3 is located festival arm assembly 1's top, spray gun assembly 4's spray gun is towards festival arm assembly 1's below, when spray gun assembly 4 sprays water downwards, the reaction force that spray gun assembly 4 received conducts to the piston rod on, make the piston rod have the motion trend of inside shrink, at this moment, the reaction force of spray gun assembly 4 is offset to the oiliness pressure force in the no pole intracavity through terminal hydro-cylinder 3, can provide bigger oiliness pressure, can bear bigger reaction force, be favorable to keeping spray gun assembly 4's stability. In addition, the fire fighting truck in this embodiment should have all the beneficial effects of the boom device of the fire fighting truck in the fourth or fifth embodiment, which are not described herein again.

The technical scheme of the invention is explained in detail by combining the attached drawings, the torque generated by the reaction force of the spray gun component on the tail end arm support can be counteracted by utilizing the pressure of the rodless cavity of the tail end oil cylinder so as to provide larger oil pressure, the stability of the spray gun component is favorably enhanced, and meanwhile, the tail end oil cylinder with a smaller model can be adopted, so that the weight of the arm support device of the fire truck is favorably reduced, the occupied space is reduced, and the cost is reduced.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fire engine boom apparatus, comprising:

a knuckle arm assembly (1);

the water delivery pipe assembly is arranged corresponding to the knuckle arm assembly (1) and connected with the knuckle arm assembly (1);

the tail end arm support (2), one end of the tail end arm support (2) is rotatably connected with one end of the knuckle arm component (1);

a tail end oil cylinder (3) arranged at one side of the knuckle arm component (1),

a first connecting part (13) is arranged on one side, close to the tail end oil cylinder (3), of the knuckle arm assembly (1), and a cylinder barrel of the tail end oil cylinder (3) is rotatably connected with the first connecting part (13);

a second connecting part (21) is arranged at one end of the tail end arm support (2) connected with the knuckle arm assembly (1), the second connecting part (21) and the first connecting part (13) are positioned at the same side, and a piston rod of the tail end oil cylinder (3) is rotatably connected with the second connecting part (21) so as to drive the tail end arm support (2) to rotate through the telescopic motion of the tail end oil cylinder (3);

the spray gun component (4) is connected to one end, far away from the knuckle arm component (1), of the tail end arm support (2), and the spray gun component (4) is communicated with the water delivery pipe component;

when the knuckle arm assembly (1) is in a horizontal state, the tail end oil cylinder (3) is positioned above the knuckle arm assembly (1);

when the fire engine cantilever crane device is in a retraction position, a spray gun of the spray gun assembly (4) faces to the lower part of the knuckle arm assembly (1), and the tail end oil cylinder (3) is positioned above the knuckle arm assembly (1);

the tail end arm support (2) can rotate within an angle range of-60 degrees to 30 degrees by taking the horizontal position as a reference;

a preset distance exists between a connection point of the tail end oil cylinder (3) and the second connection part (21) and a connection point of the knuckle arm assembly (1) and the tail end arm support (2);

the tail end oil cylinder (3) and the knuckle arm assembly (1) form a preset angle, and when the knuckle arm assembly (1) is in a horizontal state, the preset angle is a positive angle.

2. A fire fighting truck boom arrangement as claimed in claim 1, characterized in that the knuckle boom assembly (1) comprises:

the joint arm assembly comprises a plurality of joint arms which are sequentially connected end to end, and one joint arm positioned at the tail end in the joint arm assembly (1) is rotatably connected with a tail end arm frame (2).

3. A fire fighting vehicle, comprising:

a vehicle body (5);

the water supply device is arranged in the vehicle body (5);

the arm unit of claim 1 or 2, which is attached to the vehicle body (5), wherein the end of the water pipe assembly of the arm unit remote from the lance assembly (4) is connected to the water supply.

4. A fire fighting vehicle as defined in claim 3, characterized in that the knuckle arm assembly (1) in the fire fighting vehicle arm support arrangement comprises:

the knuckle arms are sequentially and rotatably connected end to end, and one knuckle arm positioned at the tail end in the knuckle arm assembly (1) is rotatably connected with the tail end arm support (2);

a plurality of hydraulic oil cylinders, two adjacent knuckle arms are respectively and rotatably connected with a cylinder barrel and a piston rod of the same hydraulic oil cylinder so as to drive the knuckle arms to rotate through the hydraulic oil cylinders,

when the fire fighting truck arm support device is in a folded state, a spray gun of the spray gun assembly (4) faces to the lower portion of the knuckle arm assembly (1), and the tail end oil cylinder (3) is located above the knuckle arm assembly (1).

5. A fire fighting vehicle as defined in claim 4, characterized in that the articulated arm assembly (1) further comprises:

the mounting base (12) is fixedly connected to the vehicle body (5), the knuckle arm at one end of the knuckle arm component (1) far away from the tail end arm support (2) is rotatably connected with the mounting base (12),

the mounting base (12) and the knuckle arm connected with the mounting base (12) are respectively and rotatably connected with a cylinder barrel and a piston rod of the same hydraulic oil cylinder.

6. A fire engine as recited in any one of claims 3-5, further comprising:

the angle detector is arranged on the spray gun assembly (4) and used for detecting the spraying angle of the spray gun assembly (4);

and the controller is electrically connected with the angle detector and the fire fighting truck arm support device so as to control the action of the fire fighting truck arm support device according to the angle information detected by the angle detector.