Boom assembly and fire truck

Abstract

The present invention provides a boom assembly and a fire truck, wherein the boom assembly comprises: a swivel seat; a boom mechanism, wherein the boom mechanism comprises: a folding arm, one end of the folding arm is hinged to the swivel seat, and the folding arm comprises at least two mutually hinged sub-folding arms; a telescopic arm, the fixed end of the telescopic arm is hinged to the other end of the folding arm; a tail arm is hinged to the telescopic end of the telescopic arm; and a driving mechanism is connected to the boom mechanism; wherein the driving mechanism is used to drive the folding arm to rotate relative to the swivel seat, to drive the telescopic arm to rotate relative to the folding arm, and to drive the tail arm to rotate relative to the telescopic arm. By setting the boom mechanism, the boom mechanism can cross the obstacle in front of the boom mechanism by adjusting the folding arm, so that the telescopic arm can be adjusted to above the obstacle before performing the telescopic operation, thereby greatly increasing the working coverage of the boom mechanism, and the telescopic arm occupies less space in the recovered state, which can reduce the space occupied by the boom mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of fire fighting equipment, and in particular to a boom assembly and a fire fighting truck. Background Art

[0002] There are basically two types of booms for existing high-rise jet fire trucks. One is the traditional "telescopic + telescopic" structure, where a cylinder connecting rod mechanism is used between two sets of telescopic arms to achieve amplitude change. However, the working range is small, and the boom has only one folding joint, which is not flexible and difficult to achieve high-precision operations in complex environments. The other is a fully folding boom high-rise jet fire truck developed in recent years. The multi-section folding boom is used to change the amplitude through a connecting rod mechanism, but this type of boom has a complex structure. When the fire truck is in operation, there are technical problems such as difficulty in operation and long boom deployment time.

[0003] Therefore, how to design a boom assembly with a large working range, simple structure and short deployment time has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, one aspect of the present invention is to provide a boom assembly.

[0006] Another aspect of the present invention is to provide a fire truck.

[0007] In view of this, according to the first purpose of the present invention, a boom assembly is proposed for a fire truck, the boom assembly comprising: a swivel seat; a boom mechanism, the boom mechanism comprising: a folding arm, one end of the folding arm is hinged to the swivel seat, the folding arm comprising at least two sub-folding arms hinged to each other; a telescopic arm, a fixed end of the telescopic arm is hinged to the other end of the folding arm; a tail arm is hinged to the telescopic end of the telescopic arm; a driving mechanism is connected to the boom mechanism; wherein the driving mechanism is used to drive the folding arm to rotate relative to the swivel seat, to drive the telescopic arm to rotate relative to the folding arm, and to drive the tail arm to rotate relative to the telescopic arm.

[0008] According to the arm assembly provided by the present invention, the swivel is the base structure of the arm assembly, and the arm assembly is connected to engineering equipment such as a fire truck through the swivel to drive the arm assembly to rotate with the swivel. The arm mechanism is the main working part of the arm assembly, and the arm mechanism consists of three parts: the first part is a folding arm, the first end of the folding arm is hinged to the swivel, and the folding arm rotates relative to the swivel during operation; the second part is a telescopic arm, the telescopic arm is an arm with adjustable length, the fixed end of the telescopic arm is hinged to the second end of the folding arm, and the telescopic arm rotates relative to the second end of the folding arm during operation, and on this basis, it extends or shortens; the third part is a tail arm, the tail arm is hinged to the telescopic end of the telescopic arm, and on this basis, it can rotate relative to the telescopic end of the telescopic arm, and the tail arm itself can also rotate or retract. The driving mechanism is the power structure of the arm assembly, which is used to provide power to the arm mechanism to realize the rotation of the arm mechanism. By setting the boom mechanism to the aforementioned structure, the boom assembly first turns the boom mechanism up through the folding arm during operation to reach the required height, and then extends the tail arm through the telescopic arm to reach the required horizontal span, and finally adjusts the working position and working angle through the tail arm. Among them, by setting the folding arm, the boom mechanism can cross the obstacle in front of the boom mechanism by adjusting the boom angle, so that the telescopic arm can be adjusted to the top of the obstacle before performing the telescopic operation. By setting the telescopic arm, the working coverage of the boom mechanism is greatly increased, and the telescopic arm occupies a small space in the retracted state, which can reduce the space occupied by the boom mechanism. In addition, the telescopic arm is extended quickly, which is convenient for the fire truck to quickly implement rescue. By setting the tail arm, the working equipment connected to the end of the boom mechanism can adjust the working angle through the rotation of the tail arm, so that the boom mechanism can carry the equipment to perform more precise work in angle and orientation, thereby optimizing the boom structure, improving the ability of the boom assembly to cross obstacles, widening the extension coverage of the boom assembly, improving the accuracy and reliability of the product, and improving the technical effect of user experience.

[0009] Specifically, the existing high-rise spray fire trucks basically have two types of boom forms. One is the traditional "telescopic + telescopic" structure, in which a cylinder connecting rod mechanism is used between two sets of telescopic arms to achieve amplitude change. However, the working range is small, and the boom has only one folding joint, which is inflexible and difficult to achieve high-precision operations in complex environments. The other is a fully folding boom high-rise spray fire truck developed in recent years. The multi-section folding boom performs amplitude change movement through a connecting rod mechanism, but the boom structure is complex. When the fire truck is operating, there are technical problems such as high difficulty in operation and long boom deployment time. In view of the above technical problems, the present invention sets a folding arm, a telescopic arm and a tail arm that are hinged to each other, so that the folding arm can rotate relative to the swivel seat, the folding arm itself can rotate, the telescopic arm can rotate relative to the folding arm, and the tail arm can rotate relative to the telescopic arm. The flexibility of the boom mechanism is guaranteed, so that the boom mechanism can freely cross obstacles and accurately adjust the working angle of the end of the boom, thereby solving the above technical problems of inflexible movement and inability to achieve high-precision operations in complex environments. By setting up a telescopic arm, the tail end arm can be adjusted to the corresponding working position through the extension and retraction of the telescopic arm, and the telescopic arm has a simple structure, short extension and retraction time, and small space occupied in the retracted state, thereby solving the above-mentioned technical problems of complex structure, difficult operation and long boom deployment time.

[0010] Furthermore, the existing boom assembly also includes a one-section folding + multiple-section telescopic + multiple-section telescopic boom form. In order to obtain a longer and higher boom, the turntable is set higher. When the boom is in a folded state, each boom is tilted. If used for a fire truck, it is easy to cause the fire truck to be too high, which does not meet the requirements of road safety regulations. At the same time, since the boom structure has only three hinge points, the boom is not flexible enough. Compared with the boom structure, the boom assembly defined in the present invention has a stronger ability to cross obstacles and a larger horizontal span when the boom is unfolded. When the boom is folded, it is more compact and will not cause the vehicle to be too high. Therefore, it has better flexibility and freedom, as well as higher space utilization.

[0011] In addition, the arm assembly in the above technical solution provided by the present invention may also have the following additional technical features:

[0012] In the above technical solution, preferably, the folding arm includes: a first sub-folding arm, one end of which is hinged to the swivel seat; a second sub-folding arm, one end of which is hinged to the other end of the first sub-folding arm, and the other end of the second sub-folding arm is hinged to the fixed end of the telescopic arm.

[0013] In this technical solution, the folding arm consists of two parts: a first sub-folding arm and a second sub-folding arm. The first end of the first sub-folding arm is hinged to the swivel seat, the second end is hinged to the first end of the second sub-folding arm, and the second end of the second sub-folding arm is hinged to the fixed end of the telescopic arm. By setting the folding arm as a two-section folding structure, after the arm frame mechanism is turned up by the first sub-folding arm, the working angle of the arm frame mechanism is further adjusted by the second sub-folding arm, thereby enhancing the flexibility of the arm frame mechanism, so that the arm frame mechanism can cross the obstacles in front through the first sub-folding arm and the second sub-folding arm, thereby achieving the technical effect of optimizing the arm frame assembly structure, improving the flexibility of the arm frame assembly, and improving the working accuracy and reliability of the product.

[0014] In any of the above technical solutions, preferably, in the retracted state, the first sub-folding arm, the second sub-folding arm, the telescopic arm and the tail end arm are at least partially parallel to each other.

[0015] In this technical solution, when the boom assembly is in a retracted state, the first sub-folding arm rotates to a horizontal position, and correspondingly, the second sub-folding arm, the telescopic arm and the tail end arm are also adjusted to a horizontal position by flipping, so that the boom mechanism can reduce the horizontal and vertical space requirements of the boom assembly in the retracted state as much as possible through horizontal stacking on the basis of reducing the length through folding, thereby making the structure of the boom assembly more sophisticated and compact, thereby achieving the technical effect of optimizing the structure of the boom assembly, reducing the space requirements of the boom assembly, and improving the practicality of the product.

[0016] In any of the above technical solutions, preferably, in the retracted state, the second sub-folding arm is located directly below the first sub-folding arm; the telescopic arm is located on the side of the first sub-folding arm, and the telescopic arm and the first sub-folding arm are located on the same horizontal plane; and the tail arm is located directly below the telescopic arm.

[0017] In this technical solution, when the boom assembly is in the retracted state, the positional relationship between the various boom structures is as follows: the second sub-folding arm is located directly below the first sub-folding arm; the telescopic arm is located to the side of the first sub-folding arm and on the same horizontal plane; the tail arm is located directly below the telescopic arm. By limiting the above positional relationship, the structure of the boom assembly in the retracted state is made more compact and reasonable, so as to reduce the space requirements of the boom assembly in the height and width directions, thereby avoiding the problem of the boom assembly in the retracted state being too high or too wide, thereby achieving the technical effect of optimizing the boom assembly structure, improving the compactness of the boom assembly structure, reducing the space requirements of the boom assembly, and improving the practicality of the product.

[0018] In any of the above technical solutions, preferably, the boom assembly further includes: a side mechanism, the side mechanism includes two relatively hinged connecting ends, one connecting end is connected to the folding arm, and the other connecting end is connected to the telescopic arm.

[0019] In this technical solution, a method for placing a telescopic arm sideways is proposed: a side mechanism is also provided in the boom assembly, wherein the side mechanism includes two relatively hinged connection ends, the two connection ends are staggered in the transverse or longitudinal direction, one connection end is connected to the folding arm, and the other connection end is connected to the telescopic arm. Specifically, the side mechanism is composed of a first arm head and a second arm head that are rotatably connected to each other and laterally arranged, wherein the first arm head is connected to the second sub-folding arm, and the second arm head is connected to the telescopic arm. During operation, the first arm head and the second arm head can rotate relative to each other, so that the second sub-folding arm and the telescopic arm can be placed sideways on the same plane, thereby effectively utilizing the lateral space of the boom mechanism and reducing the space requirement in the length direction of the boom mechanism in the retracted state, so as to achieve the technical effect of optimizing the structure of the boom assembly, improving the structural compactness of the boom assembly, reducing the space requirement of the boom assembly, and improving the practicality of the product.

[0020] In any of the above technical solutions, preferably, the second sub-folding arm is a laterally bent arm structure, and the telescopic arm is hinged to the side connecting end of the second sub-folding arm.

[0021] In this technical scheme, another method of placing the telescopic arm sideways is proposed: by setting the second sub-folding arm as a laterally bent arm structure, the side placement mechanism in the first method of placing the telescopic arm sideways is replaced; during the assembly process, the telescopic arm is hinged to the side connecting end of the second sub-folding arm so that the second sub-folding arm and the telescopic arm can be placed sideways on the same plane, thereby effectively utilizing the lateral space of the arm mechanism and reducing the space requirement of the arm mechanism in the length direction in the retracted state, so as to achieve the technical effect of optimizing the structure of the arm assembly, improving the structural compactness of the arm assembly, reducing the space requirement of the arm assembly, and improving the practicality of the product.

[0022] In any of the above technical solutions, preferably, the driving mechanism includes: a first oil cylinder, one end of the first oil cylinder is hinged to the swivel seat, and the other end of the first oil cylinder is hinged to the first sub-folding arm.

[0023] In this technical solution, a first oil cylinder is provided in the boom assembly. Preferably, one end of the first oil cylinder is a cylinder base, and the other end is a telescopic end of the oil cylinder. The base of the first oil cylinder is hinged to the swivel seat, the telescopic end of the first oil cylinder is hinged to the first sub-folding arm, and the first oil cylinder is connected to the oil pump through an oil circuit. During operation, the oil pump presses the hydraulic oil into the first oil cylinder, so that the telescopic end of the first oil cylinder extends under the action of the oil pressure, thereby driving the first sub-folding arm to unfold relative to the swivel seat. Correspondingly, when the oil pump draws back the hydraulic oil in the first oil cylinder, the telescopic end of the first oil cylinder retracts, thereby driving the first sub-folding arm to be retracted and placed on the swivel seat. In addition, the oil cylinder drive has the advantages of strong bearing capacity and smooth movement, so that the boom mechanism is more suitable for heavy-load occasions, so as to achieve the technical effect of optimizing the structure of the boom assembly and improving the movement stability and reliability of the boom assembly.

[0024] In any of the above technical solutions, preferably, the driving mechanism also includes: a first rod group, the first rod group includes: a first rod member, one end of the first rod member is hinged to the other end of the first sub-folding arm; a second rod member, one end of the second rod member is hinged to one end of the second sub-folding arm, and the other end of the second rod member is hinged to the other end of the first rod member; a second oil cylinder, one end of the second oil cylinder is hinged to the first sub-folding arm, and the other end of the second oil cylinder is hinged to the first rod member; a second rod group, the second rod group includes: a third rod member, one end of the third rod member is hinged to the fixed end of the telescopic arm; a fourth rod member, one end of the fourth rod member is hinged to the other end of the second sub-folding arm, and the other end of the fourth rod member is hinged to the other end of the third rod member; a third oil cylinder, one end of the third oil cylinder is hinged to the fixed end of the telescopic arm, and the other end of the third oil cylinder is hinged to the third rod member; a third rod group, the third rod group includes: a fifth rod member, a fifth oil cylinder ... One end of the rod is hinged to the telescopic end of the telescopic arm; the sixth rod, one end of the sixth rod is hinged to the tail end arm, and the other end of the sixth rod is hinged to the other end of the fifth rod; the fourth cylinder, one end of the fourth cylinder is hinged to the tail end arm, and the other end of the fourth cylinder is hinged to the fifth rod; wherein, the hinge point of the first sub-folding arm and the second sub-folding arm does not coincide with the hinge point of the first rod and the first sub-folding arm; the hinge point of the first sub-folding arm and the second sub-folding arm does not coincide with the hinge point of the second rod and the second sub-folding arm; the hinge point of the second sub-folding arm and the telescopic arm does not coincide with the hinge point of the third rod and the telescopic arm; the hinge point of the second sub-folding arm and the telescopic arm does not coincide with the hinge point of the fourth rod and the second sub-folding arm; the hinge point of the telescopic arm and the tail end arm does not coincide with the hinge point of the fifth rod and the telescopic arm; the hinge point of the telescopic arm and the tail end arm does not coincide with the hinge point of the sixth rod and the tail end arm.

[0025] In the technical solution, the driving mechanism also includes a first rod group and a second oil cylinder. Preferably, one end of the second oil cylinder is an oil cylinder base, and the other end is an oil cylinder telescopic end. The first rod group is composed of a first rod and a second rod. The first rod is provided with three hinge points, and the second rod is provided with two hinge points. During the assembly process, the first hinge point of the first rod is hinged to the first sub-folding arm, and the hinge point does not coincide with the hinge point of the first sub-folding arm and the second sub-folding arm; the first hinge point of the second rod is hinged to the second sub-folding arm, and the hinge point also does not coincide with the hinge point of the first sub-folding arm and the second sub-folding arm; the second hinge point of the first rod is hinged to the second hinge point of the second rod. Thus, a set of four-bar linkage is formed by the first rod, the second rod, the interval between the hinge point of the first rod and the first sub-folding arm and the hinge point of the first sub-folding arm and the second sub-folding arm, and the interval between the hinge point of the second rod and the second sub-folding arm and the hinge point of the first sub-folding arm and the second sub-folding arm. On this basis, the base of the second oil cylinder is hinged to the first sub-folding arm, and the telescopic end of the second oil cylinder is hinged to the third hinge point of the first rod. During operation, the oil pump pumps the hydraulic oil into the second oil cylinder, and the telescopic end of the second oil cylinder extends under the oil pressure to push the first rod and the second rod to rotate. Under the action of the above-mentioned four-bar linkage, the second sub-folding arm is unfolded from a position parallel to the first sub-folding arm to the required working angle, thereby realizing the unfolding and folding of the second sub-folding arm relative to the first sub-folding arm, and realizing the technical effect of optimizing the structure of the boom assembly, improving the flexibility of the boom assembly, reducing the space occupied by the boom assembly, and improving the reliability and practicality of the product.

[0026] The driving mechanism also includes a second rod group and a third oil cylinder. Preferably, one end of the third oil cylinder is an oil cylinder base, and the other end is an oil cylinder telescopic end. The second rod group is composed of a third rod and a fourth rod. The third rod is provided with three hinge points, and the fourth rod is provided with two hinge points. During the assembly process, the first hinge point of the third rod is hinged to the telescopic arm, and the hinge point does not coincide with the hinge point of the second sub-folding arm and the telescopic arm; the first hinge point of the fourth rod is hinged to the second sub-folding arm, and the hinge point also does not coincide with the hinge point of the second sub-folding arm and the telescopic arm; the second hinge point of the third rod is hinged to the second hinge point of the fourth rod. Thus, a set of four-bar linkage is formed by the third rod, the fourth rod, the interval between the hinge point of the third rod and the telescopic arm and the hinge point of the second sub-folding arm and the telescopic arm, and the interval between the hinge point of the fourth rod and the second sub-folding arm and the hinge point of the second sub-folding arm and the telescopic arm. On this basis, the base of the third oil cylinder is hinged to the telescopic arm, and the telescopic end of the third oil cylinder is hinged to the third hinge point of the third rod. During operation, the oil pump pumps the hydraulic oil into the third oil cylinder, and the telescopic end of the third oil cylinder extends under the oil pressure to push the third rod and the fourth rod to rotate. Under the action of the above four-bar linkage, the telescopic arm is unfolded from a position parallel to the second sub-folding arm to the required working angle, thereby realizing the unfolding and folding of the telescopic arm relative to the second sub-folding arm, and realizing the technical effect of optimizing the structure of the boom assembly, improving the flexibility of the boom assembly, reducing the space occupied by the boom assembly, and improving the reliability and practicality of the product.

[0027] The driving mechanism also includes a third rod group and a fourth oil cylinder. Preferably, one end of the fourth oil cylinder is an oil cylinder base, and the other end is an oil cylinder telescopic end. The third rod group is composed of a fifth rod and a sixth rod. The fifth rod is provided with three hinge points, and the sixth rod is provided with two hinge points. During the assembly process, the first hinge point of the fifth rod is hinged to the telescopic arm, and the hinge point does not coincide with the hinge point of the telescopic arm and the tail end arm; the first hinge point of the sixth rod is hinged to the tail end arm, and the hinge point also does not coincide with the hinge point of the telescopic arm and the tail end arm; the second hinge point of the fifth rod is hinged to the second hinge point of the sixth rod. Thus, a set of four-bar linkage is formed by the fifth rod, the sixth rod, the interval between the hinge point of the fifth rod and the telescopic arm and the hinge point of the telescopic arm and the tail end arm, and the interval between the hinge point of the sixth rod and the tail end arm and the hinge point of the telescopic arm and the tail end arm. On this basis, the base of the fourth oil cylinder is hinged to the tail arm, and the telescopic end of the fourth oil cylinder is hinged to the third hinge point of the fifth rod. During operation, the oil pump pumps the hydraulic oil into the fourth oil cylinder, and the telescopic end of the fourth oil cylinder extends under the oil pressure to push the fifth rod and the sixth rod to rotate. Under the action of the above four-bar linkage, the tail arm is unfolded from a position parallel to the telescopic arm to the required working angle, thereby realizing the unfolding and folding of the tail arm relative to the telescopic arm, and realizing the technical effect of optimizing the boom assembly structure, improving the flexibility of the boom assembly, reducing the space occupied by the boom assembly, and improving the reliability and practicality of the product.

[0028] In any of the above technical solutions, preferably, the telescopic arm is a two-section telescopic arm or a three-section telescopic arm; the tail end arm is a one-section folding arm or a two-section folding arm, or the tail end arm is a two-section telescopic arm or a three-section telescopic arm.

[0029] In this technical solution, the telescopic arm is a two-section telescopic arm or a three-section telescopic arm. Taking the three-section telescopic arm as an example, specifically, the telescopic arm is composed of a one-section telescopic arm, a two-section telescopic arm and a three-section telescopic arm. The one-section telescopic arm is the main structure of the telescopic arm, one section of which is hinged to the second sub-folding arm, and the whole is a tubular structure containing a cavity inside. The two-section telescopic arm is also a tubular structure with a cavity inside, which is arranged in the cavity of the one-section folding arm. The three-section folding arm is arranged in the cavity of the second-section folding arm. When the telescopic arm is not extended, the two-section telescopic arm is located in the cavity of the one-section telescopic arm, and the three-section telescopic arm is located in the cavity of the two-section telescopic arm; when the telescopic arm is extended, the two-section telescopic arm extends along the extension direction of the cavity of the one-section folding arm, and the three-section telescopic arm extends along the extension direction of the cavity of the two-section telescopic arm, thereby extending the tail arm connected to the three-section telescopic arm to the required working position. The nested telescopic arms take up less space when retracted, making the arm assembly more compact. The multi-section nested telescopic arms have a shorter retraction time, which can quickly complete the specified work in a short time to save retraction time, thereby achieving the technical effect of optimizing the telescopic arm structure, improving the working efficiency of the telescopic arm, improving the compactness of the product structure, and improving the working reliability of the product.

[0030] The tail arm is a one-section folding arm or a two-section folding arm, which is flexible in movement. By setting the tail arm as a two-section folding arm, the flexibility of the tail arm is improved, so that the tail arm can more flexibly and conveniently cross obstacles to perform firefighting work, and at the same time, the working coverage of the tail arm can be further expanded, thereby achieving the technical effect of optimizing the tail arm structure, improving the working flexibility and coverage of the boom assembly, and improving the working reliability of the product. By setting the tail arm as a two-section telescopic arm or a three-section telescopic arm, the tail arm can be longer.

[0031] The second object of the present invention is to provide a fire truck, which includes a boom assembly according to any one of the above technical solutions, and has all the beneficial effects of the pump body provided by any one of the above technical solutions. At the same time, the fire truck also includes: a body, a workbench and a cab are arranged on the body, a swivel is rotatably connected to the workbench, and the swivel is close to the cab, and the boom assembly is retracted on the workbench; a water cannon is arranged on the tail arm; a water supply system is arranged on the body; a pipeline system is arranged on the body, one end of the pipeline system is connected to the water supply system, and the other end of the pipeline system is connected to the water cannon; wherein, in the retracted state of the boom assembly, the folding arm and the telescopic arm of the boom assembly are arranged parallel to the length direction of the body.

[0032] In this technical solution, the vehicle body is the main structure of the fire truck, on which a workbench and a cab are arranged. The cab is located on one side of the workbench. By connecting the swivel seat to the workbench, the swivel seat can be rotated relative to the plane of the workbench, so that the arm assembly can be adjusted to the correct working position by rotating the swivel seat when the fire truck is inconvenient to adjust its direction. When the arm assembly is retracted, the arm assembly is located above the workbench, and the vehicle body is responsible for carrying the arm assembly. Furthermore, by arranging the swivel seat close to the cab, the arm assembly can be extended toward the rear of the vehicle body to avoid interference from the cab during the deployment of the arm assembly; on the other hand, compared with the arrangement of the swivel seat far away from the cab, arranging the swivel seat close to the cab can increase the length of the arm assembly to a certain extent and reduce the length of the vehicle body, thereby making the fire truck structure more compact and more practical.

[0033] By setting a water cannon on the tail arm, the fire truck can transport the water cannon to the fire source by extending the boom assembly and extinguish the fire source through the high-pressure water column ejected by the water cannon, thereby achieving firefighting operations. Among them, the vehicle body is also provided with a water supply system and a pipeline system to maintain the operation of the water cannon. The water supply system, the pipeline system and the water cannon are connected in sequence. During the operation, the water supply system pumps the fire-fighting water into the pipeline system, and finally sprays it from the water cannon to complete the firefighting operation through the water cannon. In addition, since the folding arm and telescopic arm of the boom assembly are arranged parallel to the length direction of the vehicle body in the retracted state, the structure is compact and can meet the height requirements of the fire truck.

[0034] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 A schematic diagram of the existing boom assembly structure is shown;

[0037] Figure 2 Shows Figure 1 A schematic diagram of the structure of the boom assembly in a retracted state;

[0038] Figure 3 A schematic structural diagram of a boom assembly provided according to an embodiment of the present invention is shown;

[0039] Figure 4 A schematic structural diagram of a boom assembly provided according to another embodiment of the present invention is shown;

[0040] Figure 5 It shows that Figure 4A top view of the boom assembly provided by the illustrated embodiment;

[0041] Figure 6 A schematic structural diagram showing a schematic structural diagram of a first rod group provided according to an embodiment of the present invention;

[0042] Figure 7 A schematic structural diagram showing a schematic structural diagram of a second rod group provided according to an embodiment of the present invention;

[0043] Figure 8 A schematic diagram showing a schematic diagram of the structure of a third rod group provided according to an embodiment of the present invention;

[0044] Fig. 9 It shows that Figure 3 A schematic diagram of the structure of the biasing mechanism provided by the illustrated embodiment;

[0045] Fig.10 It shows that Fig. 9 A top view of the biasing mechanism provided by the illustrated embodiment;

[0046] Fig.11 A structural schematic diagram of a boom assembly provided according to yet another embodiment of the present invention is shown.

[0047] in, Figures 3 to 11 The corresponding relationship between the reference numerals and the component names is as follows:

[0048] 1 fire truck, 12 swivel seat, 14 arm mechanism, 142 folding arm, 144 first sub-folding arm, 146 second sub-folding arm, 148 telescopic arm, 150 one-stage telescopic arm, 152 two-stage telescopic arm, 154 three-stage telescopic arm, 156 tail end arm, 158 side mechanism, 162 first cylinder, 164 first rod group, 166 first rod member, 168 second rod member, 170 second cylinder, 172 second rod group, 174 third rod member, 176 fourth rod member, 178 third cylinder, 180 third rod group, 182 fifth rod member, 184 sixth rod member, 186 fourth cylinder, 20 vehicle body, 30 water cannon DETAILED DESCRIPTION

[0049] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0050] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0051] Refer to the following Figures 3 to 11 A boom assembly and a fire truck 1 according to some embodiments of the present invention are described.

[0052] In view of this, according to an embodiment of the present invention, Figure 3 As shown, a boom assembly is proposed for a fire truck 1, the boom assembly comprising: a swivel seat 12; a boom mechanism 14, the boom mechanism 14 comprising: a folding arm 142, one end of the folding arm 142 is hinged to the swivel seat 12, the folding arm 142 comprises at least two mutually hinged sub-folding arms; a telescopic arm 148, a fixed end of the telescopic arm 148 is hinged to the other end of the folding arm 142; a tail arm 156 is hinged to the telescopic end of the telescopic arm 148; a driving mechanism (not shown in the figure), connected to the boom mechanism 14; wherein the driving mechanism is used to drive the folding arm 142 to rotate relative to the swivel seat 12, to drive the telescopic arm 148 to rotate relative to the folding arm 142, and to drive the tail arm 156 to rotate relative to the telescopic arm 148.

[0053] According to the arm assembly provided by the present invention, the swivel seat 12 is the base structure of the arm assembly, and the arm assembly is connected to engineering equipment such as a fire truck 1 through the swivel seat 12 to drive the arm assembly to rotate together with the swivel seat 12. The arm mechanism 14 is the main working part of the arm assembly, and the arm mechanism 14 is composed of three parts: the first part is the folding arm 142, the first end (head end) of the folding arm 142 is hinged to the swivel seat 12, and the folding arm 142 rotates relative to the swivel seat 12 during operation; the second part is the telescopic arm 148, the telescopic arm 148 is a length-adjustable arm, the fixed end of the telescopic arm 148 is hinged to the second end (the overall tail end) of the folding arm 142, and the telescopic arm 148 rotates relative to the second end of the folding arm 142 during operation, and on this basis, the telescopic arm 148 is extended or retracted; the third part is the tail end arm 156, the tail end arm 156 is hinged to the telescopic end of the telescopic arm 148, and the third folding arm is extended or retracted under the regulation of the telescopic arm 148 during operation, and on this basis, it can rotate relative to the telescopic end of the telescopic arm 148, and the tail end arm itself can also rotate or retract. The driving mechanism is the power structure of the arm assembly, which is used to provide power to the arm mechanism 14 to realize the rotation of the arm mechanism 14. By setting the arm mechanism 14 to the aforementioned structure, the arm assembly first turns the arm mechanism 14 up through the folding arm 142 during operation to reach the required height, and then extends the tail arm 156 through the telescopic arm 148 to reach the required lateral span, and finally adjusts the working position and working angle through the tail arm 156. Among them, by setting the folding arm 142, the arm mechanism 14 can cross the obstacle in front of the arm mechanism 14 by adjusting the angle, so that the telescopic arm 148 can be adjusted to the top of the obstacle before performing the telescopic operation. By setting the telescopic arm 148, the working coverage of the arm mechanism 14 is greatly increased, and the telescopic arm 148 occupies a smaller space in the retracted state, which can reduce the space occupied by the arm mechanism 14. In addition, the telescopic arm is extended quickly, which is convenient for the fire truck to quickly implement rescue. By providing the tail arm 156, the working equipment connected to the end of the arm mechanism 14 can adjust the working angle by rotating the tail arm 156, so that the arm mechanism 14 can carry the equipment to perform work with more precise angles and orientations, thereby optimizing the arm structure, improving the ability of the arm assembly to cross obstacles, widening the extension coverage of the arm assembly, improving the working accuracy and reliability of the product, and improving the technical effect of user experience.

[0054] Specifically, the existing high-rise jet fire trucks basically have two types of booms. One is the traditional "telescopic + telescopic" structure, in which a cylinder connecting rod mechanism is used between two sets of telescopic arms to achieve amplitude change. However, the working range is small, and the boom has only one folding joint, which is not flexible and difficult to achieve high-precision operations in complex environments. The other is a fully folding boom high-rise jet fire truck developed in recent years. The multi-section folding boom is used to change the amplitude through a connecting rod mechanism, but this type of boom has a complex structure. When the fire truck is in operation, there are technical problems such as difficulty in operation and long boom deployment time. In view of the above technical problems, the present invention sets a mutually hinged folding arm 142, a telescopic arm 148 and a tail arm 156, so that the folding arm 142 can rotate relative to the swivel seat 12, and the folding arm 142 itself can rotate, so that the telescopic arm 148 can rotate relative to the folding arm 142, and the tail arm 156 can rotate relative to the telescopic arm 148, which greatly improves the flexibility of the arm frame mechanism 14, so that the arm frame mechanism 14 can freely cross obstacles and accurately adjust the working angle of the end of the arm frame, thereby solving the above technical problems of inflexible movements and inability to achieve high-precision operations in complex environments. By setting the telescopic arm 148, the tail arm 156 can be adjusted to the corresponding working position through the telescopic adjustment of the telescopic arm 148, and the telescopic arm 148 has a simple structure, a short telescopic time, and occupies a small space in the retracted state, thereby solving the above technical problems of complex structure, high difficulty in operation, and long boom deployment time.

[0055] Furthermore, in the existing arm support mechanism, Figure 1 As shown, it also includes a one-section folding + multiple-section telescopic + multiple-section telescopic boom. In order to obtain a longer and higher boom, the turntable is set higher. When the boom is in the folded state, Figure 2 As shown, each boom is tilted. If used for a fire truck, it may easily cause the fire truck to be too high, which does not meet the requirements of road safety regulations. At the same time, since the boom structure has only three hinge points, the flexibility of the boom is insufficient. Compared with the boom structure, the boom mechanism 14 defined in the present invention has a stronger ability to cross obstacles and a larger horizontal span when the boom is unfolded, and is more compact when the boom is folded, which will not cause the vehicle to be too high. Therefore, it has better flexibility and freedom, as well as higher space utilization.

[0056] In one embodiment of the present invention, preferably, Figure 3 As shown, the folding arm 142 includes: a first sub-folding arm 144, one end of the first sub-folding arm 144 is hinged to the swivel seat 12; a second sub-folding arm 146, one end of the second sub-folding arm 146 is hinged to the other end of the first sub-folding arm 144, and the other end of the second sub-folding arm 146 is hinged to the fixed end of the telescopic arm 148.

[0057] In this embodiment, the folding arm 142 is composed of a first sub-folding arm 144 and a second sub-folding arm 146. The first end of the first sub-folding arm 144 is hinged to the rotating seat 12, the second end is hinged to the first end of the second sub-folding arm 146, and the second end of the second sub-folding arm 146 is hinged to the fixed end of the telescopic arm 148. By setting the folding arm 142 as a two-stage folding structure, the arm frame mechanism 14 is turned up by the first sub-folding arm 144, and the working angle of the arm frame mechanism 14 is further adjusted by the second sub-folding arm 146, thereby enhancing the flexibility of the arm frame mechanism 14, so that the arm frame mechanism 14 can cross the obstacles in front through the first sub-folding arm 144 and the second sub-folding arm 146, thereby achieving the technical effect of optimizing the arm frame assembly structure, improving the flexibility of the arm frame assembly, and improving the working accuracy and reliability of the product.

[0058] In one embodiment of the present invention, preferably, Figure 4 and Figure 5 As shown, in the retracted state, the first sub-folding arm 144, the second sub-folding arm 146, the telescopic arm 148 and the tail arm 156 are at least partially parallel to each other.

[0059] In this embodiment, when the boom assembly is in a retracted state, the first sub-folding arm 144 rotates to a horizontal position, and correspondingly, the second sub-folding arm 146, the telescopic arm 148 and the tail end arm 156 are also adjusted to a horizontal position by flipping, so that the boom mechanism 14 can reduce the horizontal and vertical space requirements of the boom assembly in the retracted state as much as possible through horizontal stacking on the basis of reducing the length by folding, thereby making the structure of the boom assembly more sophisticated and compact, thereby achieving the technical effect of optimizing the structure of the boom assembly, reducing the space requirements of the boom assembly, and improving the practicality of the product.

[0060] In one embodiment of the present invention, preferably, Figure 4 and Figure 5 As shown, in the retracted state, the second sub-folding arm 146 is located directly below the first sub-folding arm 144; the telescopic arm 148 is located on the side of the first sub-folding arm 144, and the telescopic arm 148 and the first sub-folding arm 144 are located on the same horizontal plane; the tail arm 156 is located directly below the telescopic arm 148.

[0061] In this embodiment, when the boom assembly is in the retracted state, the positional relationship between the various boom structures is as follows: the second sub-folding arm 146 is located directly below the first sub-folding arm 144; the telescopic arm 148 is located to the side of the first sub-folding arm 144 and on the same horizontal plane; the tail arm 156 is located directly below the telescopic arm 148. By defining the above positional relationship, the structure of the boom assembly in the retracted state is made more compact and reasonable, so as to reduce the space requirements of the boom assembly in the height direction and the width direction, thereby avoiding the problem of the boom assembly in the retracted state being too high or too wide, thereby achieving the technical effect of optimizing the boom assembly structure, improving the compactness of the boom assembly structure, reducing the space requirements of the boom assembly, and improving the practicality of the product.

[0062] In one embodiment of the present invention, preferably, Fig. 9 and Fig.10 As shown, the arm assembly also includes: a side mechanism 158, the side mechanism 158 includes two relatively hinged connection ends, one connection end is hinged to the folding arm 142, and the other connection end is hinged to the telescopic arm 148.

[0063] In this embodiment, a method for lateral placement of the telescopic arm 148 is proposed: a lateral placement mechanism 158 is also provided in the arm support assembly, wherein the lateral placement mechanism 158 includes two relatively hinged connection ends, the two connection ends are staggered in the transverse or longitudinal direction, one of the connection ends is connected to the folding arm 142, and the other connection end is connected to the telescopic arm 148. Specifically, the lateral placement mechanism 158 is composed of a first arm head and a second arm head that are rotatably connected (i.e., hinged) to each other and arranged laterally, wherein the first arm head is connected to the second sub-folding arm 146, and the second arm head is connected to the telescopic arm 148. During operation, the first arm head and the second arm head can rotate relative to each other, so that the second sub-folding arm 146 and the telescopic arm 148 can be lateralized on the same plane, thereby effectively utilizing the lateral space of the arm support mechanism 14, reducing the space requirement in the length direction of the arm support mechanism 14 in the retracted state, so as to achieve the technical effect of optimizing the structure of the arm support assembly, improving the structural compactness of the arm support assembly, reducing the space requirement of the arm support assembly, and improving the practicality of the product.

[0064] In any of the above technical solutions, preferably, Fig.11 As shown, the second sub-folding arm 146 is a laterally bent arm structure, and the telescopic arm 148 is hinged to the side connecting end of the second sub-folding arm 146 .

[0065] In this embodiment, another method for placing the telescopic arm 148 sideways is proposed: by setting the second sub-folding arm 146 as a laterally bent arm structure, the side placement mechanism 158 in the first telescopic arm side placement method is replaced; during the assembly process, by hingedly connecting the telescopic arm 148 to the side connecting end of the second sub-folding arm 146, the second sub-folding arm 146 and the telescopic arm 148 can be placed sideways on the same plane, thereby effectively utilizing the lateral space of the arm mechanism 14 and reducing the space requirement in the length direction of the arm mechanism 14 in the retracted state, so as to achieve the technical effect of optimizing the structure of the arm assembly, improving the structural compactness of the arm assembly, reducing the space requirement of the arm assembly, and improving the practicality of the product.

[0066] In one embodiment of the present invention, preferably, Figure 3 As shown, the driving mechanism includes: a first oil cylinder 162 , one end of the first oil cylinder 162 is hinged to the swivel seat 12 , and the other end of the first oil cylinder 162 is hinged to the first sub-folding arm 144 .

[0067] In this embodiment, a first oil cylinder 162 is provided in the boom assembly. Preferably, one end of the first oil cylinder 162 is an oil cylinder base, and the other end is an oil cylinder telescopic end. The base of the first oil cylinder 162 is hinged to the swivel seat 12, the telescopic end of the first oil cylinder 162 is hinged to the first sub-folding arm 144, and the first oil cylinder 162 is connected to the oil pump through an oil circuit. During operation, the oil pump presses hydraulic oil into the first oil cylinder 162, so that the telescopic end of the first oil cylinder 162 extends under the action of oil pressure, thereby driving the first sub-folding arm 144 to unfold relative to the swivel seat 12. Correspondingly, when the oil pump withdraws the hydraulic oil in the first oil cylinder 162, the telescopic end of the first oil cylinder 162 retracts, thereby driving the first sub-folding arm 144 to be retracted and mounted on the swivel seat 12. In addition, the oil cylinder drive has the advantages of strong bearing capacity and stable movement, so that the boom mechanism 14 is more suitable for heavy-load occasions, so as to achieve the technical effect of optimizing the boom assembly structure and improving the stability and reliability of the boom assembly movement.

[0068] In one embodiment of the present invention, preferably, Figure 6 , Figure 7 and Figure 8As shown, the driving mechanism further includes: a first rod group 164, the first rod group 164 includes: a first rod 166, one end of the first rod 166 is hinged to the other end of the first sub-folding arm 144; a second rod 168, one end of the second rod 168 is hinged to one end of the second sub-folding arm 146, and the other end of the second rod 168 is hinged to the other end of the first rod 166; a second oil cylinder 170, one end of the second oil cylinder 170 is hinged to the first sub-folding arm 144, and one end of the second oil cylinder 170 is hinged to the first rod 166; a second rod group 172, the second rod group 17 2 includes: a third rod 174, one end of the third rod 174 is hinged to the fixed end of the telescopic arm 148; a fourth rod 176, one end of the fourth rod 176 is hinged to the other end of the second sub-folding arm 146, and the other end of the fourth rod 176 is hinged to the other end of the third rod 174; a third oil cylinder 178, one end of the third oil cylinder 178 is hinged to the fixed end of the telescopic arm 148, and the other end of the third oil cylinder 178 is hinged to the third rod 174; a third rod group 180, the third rod group 180 includes: a fifth rod 182, one end of the fifth rod 182 is hinged to the telescopic arm 148, and the third rod group 180 includes: The telescopic end of the arm 148 is hinged; the sixth rod 184, one end of the sixth rod 184 is hinged to the tail end arm 156, and the other end of the sixth rod 184 is hinged to the other end of the fifth rod 182; the fourth cylinder 186, one end of the fourth cylinder 186 is hinged to the tail end arm 156, and the other end of the fourth cylinder 186 is hinged to the fifth rod 182; wherein the hinge point of the first sub-folding arm 144 and the second sub-folding arm 146 does not coincide with the hinge point of the first rod 166 and the first sub-folding arm 144; the hinge point of the first sub-folding arm 144 and the second sub-folding arm 146 The hinge point does not coincide with the hinge point of the second rod 168 and the second sub-folding arm 146; the hinge point of the second sub-folding arm 146 and the telescopic arm 148 does not coincide with the hinge point of the third rod 174 and the telescopic arm 148; the hinge point of the second sub-folding arm 146 and the telescopic arm 148 does not coincide with the hinge point of the fourth rod 176 and the second sub-folding arm 146; the hinge point of the telescopic arm 148 and the tail end arm 156 does not coincide with the hinge point of the fifth rod 182 and the telescopic arm 148; the hinge point of the telescopic arm 148 and the tail end arm 156 does not coincide with the hinge point of the sixth rod 184 and the tail end arm 156.

[0069] In this embodiment, the driving mechanism further includes a first rod group 164 and a second oil cylinder 170. Preferably, one end of the second oil cylinder 170 is an oil cylinder base, and the other end is an oil cylinder telescopic end. The first rod group 164 is composed of a first rod 166 and a second rod 168. The first rod 166 is provided with three hinge points, and the second rod 168 is provided with two hinge points. During the assembly process, the first hinge point of the first rod 166 is hinged to the first sub-folding arm 144, and the hinge point does not coincide with the hinge point of the first sub-folding arm 144 and the second sub-folding arm 146; the first hinge point of the second rod 168 is hinged to the second sub-folding arm 146, and the hinge point also does not coincide with the hinge point of the first sub-folding arm 144 and the second sub-folding arm 146; the second hinge point of the first rod 166 is hinged to the second hinge point of the second rod 168. Thus, a set of four-bar linkage is formed by the first rod 166, the second rod 168, the interval between the hinge point between the first rod 166 and the first sub-folding arm 144 and the hinge point between the first sub-folding arm 144 and the second sub-folding arm 146, and the interval between the hinge point between the second rod 168 and the second sub-folding arm 146 and the hinge point between the first sub-folding arm 144 and the second sub-folding arm 146. On this basis, the base of the second oil cylinder 170 is hinged to the first sub-folding arm 144, and the telescopic end of the second oil cylinder 170 is hinged to the third hinge point of the first rod 166. During operation, the oil pump pumps the hydraulic oil into the second oil cylinder 170, and the telescopic end of the second oil cylinder 170 extends under the oil pressure to push the first rod 166 and the second rod 168 to rotate. Under the action of the above-mentioned four-bar linkage, the second sub-folding arm 146 is unfolded from a position parallel to the first sub-folding arm 144 to the required working angle, thereby realizing the unfolding and folding of the second sub-folding arm 146 relative to the first sub-folding arm 144, and realizing the technical effect of optimizing the structure of the arm assembly, improving the flexibility of the arm assembly, reducing the space occupied by the arm assembly, and improving product reliability and practicality.

[0070] The driving mechanism also includes a second rod group 172 and a third oil cylinder 178. Preferably, one end of the third oil cylinder 178 is an oil cylinder base, and the other end is an oil cylinder telescopic end. The second rod group 172 is composed of a third rod 174 and a fourth rod 176. The third rod 174 is provided with three hinge points, and the fourth rod 176 is provided with two hinge points. During the assembly process, the first hinge point of the third rod 174 is hinged to the telescopic arm 148, and the hinge point does not coincide with the hinge point of the second sub-folding arm 146 and the telescopic arm 148; the first hinge point of the fourth rod 176 is hinged to the second sub-folding arm 146, and the hinge point also does not coincide with the hinge point of the second sub-folding arm 146 and the telescopic arm 148; the second hinge point of the third rod 174 is hinged to the second hinge point of the fourth rod 176. Thus, a set of four-bar linkage is formed by the third rod 174, the fourth rod 176, the interval between the hinge point between the third rod 174 and the telescopic arm 148 and the hinge point between the second sub-folding arm 146 and the telescopic arm 148, and the interval between the hinge point between the fourth rod 176 and the second sub-folding arm 146 and the hinge point between the second sub-folding arm 146 and the telescopic arm 148. On this basis, the base of the third oil cylinder 178 is hinged to the telescopic arm 148, and the telescopic end of the third oil cylinder 178 is hinged to the third hinge point of the third rod 174. During operation, the oil pump pumps the hydraulic oil into the third oil cylinder 178, and the telescopic end of the third oil cylinder 178 extends out under the oil pressure to push the third rod 174 and the fourth rod 176 to rotate. Under the action of the above-mentioned four-bar linkage, the telescopic arm 148 is unfolded from a position parallel to the second sub-folding arm 146 to the required working angle, thereby realizing the unfolding and folding of the telescopic arm 148 relative to the second sub-folding arm 146, and realizing the technical effect of optimizing the structure of the arm assembly, improving the flexibility of the arm assembly, reducing the space occupied by the arm assembly, and improving product reliability and practicality.

[0071] The driving mechanism also includes a third rod group 180 and a fourth oil cylinder 186. Preferably, one end of the fourth oil cylinder 186 is an oil cylinder base, and the other end is an oil cylinder telescopic end. The third rod group 180 is composed of a fifth rod 182 and a sixth rod 184. The fifth rod 182 is provided with three hinge points, and the sixth rod 184 is provided with two hinge points. During the assembly process, the first hinge point of the fifth rod 182 is hinged to the telescopic arm 148, and the hinge point does not coincide with the hinge point of the telescopic arm 148 and the tail end arm 156; the first hinge point of the sixth rod 184 is hinged to the tail end arm 156, and the hinge point also does not coincide with the hinge point of the telescopic arm 148 and the tail end arm 156; the second hinge point of the fifth rod 182 is hinged to the second hinge point of the sixth rod 184. Thus, a set of four-bar linkage is formed by the fifth rod 182, the sixth rod 184, the interval between the hinge point between the fifth rod 182 and the telescopic arm 148 and the hinge point between the telescopic arm 148 and the tail arm 156, and the interval between the hinge point between the sixth rod 184 and the tail arm 156 and the hinge point between the telescopic arm 148 and the tail arm 156. On this basis, the base of the fourth oil cylinder 186 is hinged to the tail arm 156, and the telescopic end of the fourth oil cylinder 186 is hinged to the third hinge point of the fifth rod 182. During operation, the oil pump pumps the hydraulic oil into the fourth oil cylinder 186, and the telescopic end of the fourth oil cylinder 186 extends out under the oil pressure to push the fifth rod 182 and the sixth rod 184 to rotate. Under the action of the above-mentioned four-bar linkage, the tail end arm 156 is unfolded from a position parallel to the telescopic arm 148 to the required working angle, thereby realizing the unfolding and folding of the tail end arm 156 relative to the telescopic arm 148, and realizing the technical effect of optimizing the structure of the boom assembly, improving the flexibility of the boom assembly, reducing the space occupied by the boom assembly, and improving product reliability and practicality.

[0072] In one embodiment of the present invention, preferably, Figure 3 As shown, the telescopic arm 148 is a two-section telescopic arm or a three-section telescopic arm 148; the tail end arm 156 is a one-section folding arm or a two-section folding arm, or the tail end arm 156 is a two-section telescopic arm or a three-section telescopic arm.

[0073] In this embodiment, the telescopic arm 148 is a two-section telescopic arm or a three-section telescopic arm 148. Taking the three-section telescopic arm as an example, specifically, the telescopic arm 148 is composed of a one-section telescopic arm 150, a two-section telescopic arm 152 and a three-section telescopic arm 154. The one-section telescopic arm 150 is the main structure of the telescopic arm 148, one section of which is hinged to the second sub-folding arm 146, and the whole is a tubular structure containing a cavity inside. The two-section telescopic arm 152 is also a tubular structure with a cavity inside, which is arranged in the cavity of the one-section folding arm. The three-section folding arm is arranged in the cavity of the second-section folding arm. When the telescopic arm 148 is not extended, the two-stage telescopic arm 152 is located in the cavity of the one-stage telescopic arm 150, and the three-stage telescopic arm 154 is located in the cavity of the two-stage telescopic arm 152; when the telescopic arm 148 is extended, the two-stage telescopic arm 152 extends along the extension direction of the cavity of the one-stage folding arm, and the three-stage telescopic arm 154 extends along the extension direction of the cavity of the two-stage telescopic arm 152, thereby extending the tail arm 156 connected to the three-stage telescopic arm 154 to the required working position. The nested telescopic arm 148 occupies a smaller space in the retracted state, which can make the arm frame assembly more delicate and compact, and the multi-stage nested telescopic arm 148 has a shorter telescopic time, which can quickly complete the specified work in a short time to save telescopic time, thereby achieving the technical effect of optimizing the structure of the telescopic arm 148, improving the working efficiency of the telescopic arm 148, improving the compactness of the product structure, and improving the working reliability of the product.

[0074] The tail arm 156 is a one-section folding arm or a two-section folding arm, and is flexible in movement. By setting the tail arm 156 as a two-section folding arm, the flexibility of the tail arm 156 is improved, so that the tail arm 156 can more flexibly and conveniently cross obstacles to perform firefighting work, and at the same time, the working coverage of the tail arm 156 can be further expanded, thereby achieving the technical effect of optimizing the structure of the tail arm 156, improving the working flexibility and coverage of the boom assembly, and improving the working reliability of the product. By setting the tail arm 156 as a two-section telescopic arm or a three-section telescopic arm, the tail arm 156 can obtain a longer length.

[0075] The second object of the present invention is to provide a fire truck 1, such as Figure 3As shown, the fire truck 1 includes the arm assembly of any one of the above technical solutions, and the fire truck 1 has all the beneficial effects of the pump body provided by any of the above technical solutions. At the same time, the fire truck 1 also includes: a body 20, on which a workbench and a cab are arranged, a swivel seat 12 is rotatably connected to the workbench, and the swivel seat 12 is close to the cab, and the arm assembly is retracted on the workbench; a water cannon 30 is arranged on the tail arm 156; a water supply system is arranged on the body 20; a pipeline system is arranged on the body 20, one end of the pipeline system is connected to the water supply system, and the other end of the pipeline system is connected to the water cannon 30; wherein, in the retracted state of the arm assembly, the folding arm and the telescopic arm of the arm assembly are arranged parallel to the length direction of the body.

[0076] In this embodiment, the vehicle body 20 is the main structure of the fire truck 1, on which a workbench and a cab are arranged. The cab is located on one side of the workbench. By connecting the swivel seat 12 to the workbench, the swivel seat 12 can be rotated relative to the plane of the workbench, so that the arm assembly can be adjusted to the correct working position by rotating the swivel seat 12 when the fire truck 1 is inconvenient to adjust the direction. When the arm assembly is retracted, the arm assembly is located above the workbench, and the vehicle body 20 is responsible for carrying the arm assembly. Furthermore, by arranging the swivel seat 12 close to the cab, the arm assembly can be extended toward the tail of the vehicle body 20 to avoid interference from the cab during the deployment of the arm assembly; on the other hand, compared with the arrangement of the swivel seat 12 away from the cab, arranging the swivel seat 12 at a position close to the cab can increase the length of the arm assembly to a certain extent and reduce the length of the vehicle body, thereby making the fire truck 1 more compact and more practical.

[0077] By arranging the water cannon 30 on the tail arm 156, the fire truck 1 can transport the water cannon 30 to the fire source by extending the boom assembly and extinguish the fire source through the high-pressure water column ejected by the water cannon 30, thereby achieving firefighting operations. Among them, the vehicle body is also provided with a water supply system and a pipeline system for maintaining the operation of the water cannon 30. The water supply system, the pipeline system and the water cannon 30 are connected in sequence. During the operation, the water supply system pumps the fire-fighting water into the pipeline system, and finally sprays it from the water cannon 30 to complete the firefighting operation through the water cannon 30. In addition, since the folding arm and the telescopic arm of the boom assembly are arranged parallel to the length direction of the vehicle body in the retracted state of the boom assembly, the structure is compact and can meet the height requirements of the fire truck.

[0078] In a specific embodiment of the present invention, the arm mechanism 14 may also have the following extended structure:

[0079] 1) The folding arm 142 includes but is not limited to two sections, and more levels of sub-folding arms can be added on the basis of the first sub-folding arm 144 and the second sub-folding arm 146;

[0080] 2) The telescopic arm 148 includes but is not limited to three sections, and more levels of sub-telescopic arms 148 can be added on the basis of the two-section telescopic arm 152 and the three-section telescopic arm 154;

[0081] 3) The tail end arm 156 includes but is not limited to one section, and the tail end arm 156 can be composed of multiple sub-folding arms;

[0082] 4) In addition to the water monitor 30, any other firefighting equipment may be installed at the end of the tail arm 156, such as a firefighter pan / tilt and a solid firefighting agent nozzle;

[0083] 5) In addition to the driving mechanism of the oil cylinder and the rod group described in the scheme, a hydraulic motor can also be set to directly drive the rotation of the structure at both ends of the hinge point.

[0084] In the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A boom assembly for a fire truck, characterized in that: The arm support assembly comprises: transposition; The arm support mechanism comprises: A folding arm, one end of which is hinged to the rotating seat, and the folding arm comprises at least two sub-folding arms hinged to each other; A telescopic arm, wherein a fixed end of the telescopic arm is hinged to the other end of the folding arm; a tail end arm, hinged to the telescopic end of the telescopic arm; A driving mechanism connected to the arm mechanism; Wherein, the driving mechanism is used to drive the folding arm to rotate relative to the rotating seat, to drive the telescopic arm to rotate relative to the folding arm, and to drive the tail end arm to rotate relative to the telescopic arm; The folding arm comprises: A first sub-folding arm, one end of which is hinged to the rotating seat; a second sub-folding arm, one end of the second sub-folding arm being hinged to the other end of the first sub-folding arm, and the other end of the second sub-folding arm being hinged to the fixed end of the telescopic arm; In the retracted state, the first sub-folding arm, the second sub-folding arm, the telescopic arm and the tail end arm are at least partially parallel to each other; The arm assembly also includes: A side mechanism, the side mechanism comprising two relatively hinged connection ends, one of the connection ends being connected to the folding arm, and the other of the connection ends being connected to the telescopic arm, the side mechanism comprising a first arm head and a second arm head being rotatably connected to each other and laterally arranged, the first arm head being connected to the second sub-folding arm, the second arm head being connected to the telescopic arm, the first arm head and the second arm head being able to rotate relative to each other so that the second sub-folding arm and the telescopic arm are laterally placed on the same plane; or The second sub-folding arm is a laterally bent arm structure, and the telescopic arm is hinged to the side connecting end of the second sub-folding arm so that the second sub-folding arm and the telescopic arm can be placed laterally on the same plane.

2. The boom assembly according to claim 1, characterized in that: The driving mechanism comprises: A first oil cylinder, one end of which is hinged to the swivel seat, and the other end of which is hinged to the first sub-folding arm.

3. The boom assembly according to claim 1, characterized in that: The driving mechanism further comprises: A first rod group, the first rod group comprising: A first rod, one end of which is hinged to the other end of the first sub-folding arm; a second rod, one end of the second rod being hinged to one end of the second sub-folding arm, and the other end of the second rod being hinged to the other end of the first rod; a second oil cylinder, one end of which is hinged to the first sub-folding arm, and the other end of which is hinged to the first rod; A second rod group, the second rod group comprising: a third rod, one end of which is hinged to the fixed end of the telescopic arm; a fourth rod, one end of the fourth rod being hinged to the other end of the second sub-folding arm, and the other end of the fourth rod being hinged to the other end of the third rod; a third oil cylinder, one end of which is hinged to the fixed end of the telescopic arm, and the other end of which is hinged to the third rod; A third rod group, the third rod group comprising: a fifth rod, one end of which is hinged to the telescopic end of the telescopic arm; a sixth rod, one end of the sixth rod being hinged to the tail end arm, and the other end of the sixth rod being hinged to the other end of the fifth rod; a fourth oil cylinder, one end of which is hinged to the tail end arm, and the other end of which is hinged to the fifth rod; Wherein, the hinge point between the first sub-folding arm and the second sub-folding arm does not coincide with the hinge point between the first rod and the first sub-folding arm; The hinge point between the first folding sub-arm and the second folding sub-arm does not coincide with the hinge point between the second rod and the second folding sub-arm; The hinge point between the second sub-folding arm and the telescopic arm does not coincide with the hinge point between the third rod and the telescopic arm; The hinge point between the second folding sub-arm and the telescopic arm does not coincide with the hinge point between the fourth rod and the second folding sub-arm; The hinge point between the telescopic arm and the tail end arm does not coincide with the hinge point between the fifth rod and the telescopic arm; The hinge point between the telescopic arm and the tail end arm does not coincide with the hinge point between the sixth rod and the tail end arm.

4. The boom assembly according to any one of claims 1 to 3, characterized in that: The telescopic arm is a two-section telescopic arm or a three-section telescopic arm; The tail end arm is a one-section folding arm or a two-section folding arm, or the tail end arm is a two-section telescopic arm or a three-section telescopic arm.

5. A fire truck, characterized in that: The fire truck comprises the boom assembly according to any one of claims 1 to 4, and further comprises: A vehicle body, wherein a workbench and a cab are arranged on the vehicle body, the swivel seat is rotatably connected to the workbench, and the swivel seat is close to the cab, and the arm assembly is retracted onto the workbench; A water cannon, arranged on the tail end arm; A water supply system is arranged on the vehicle body; A pipeline system is arranged on the vehicle body, one end of the pipeline system is connected to the water supply system, and the other end of the pipeline system is connected to the water monitor; Wherein, when the boom assembly is in the retracted state, the folding arm and the telescopic arm of the boom assembly are arranged parallel to the length direction of the vehicle body.

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