Fire fighting truck boom structure and fire fighting truck

Abstract

The utility model provides a fire fighting truck boom structure and a fire fighting truck, and relates to the technical field of fire fighting. The fire fighting truck boom structure comprises a first telescopic boom assembly, a second telescopic boom assembly, a folding boom, a working bucket and a ladder stand mechanism, the first telescopic boom assembly comprises a first main boom and a plurality of first telescopic booms, the first main boom is rotationally connected to a rotary table, and the first telescopic booms are arranged in the first main boom in a sleeved mode and are arranged in the first main boom in a sliding mode; the second telescopic arm assembly comprises a second main arm and a plurality of second telescopic arms, the second main arm is rotationally connected to the first telescopic arm located on the innermost side in the multiple first telescopic arms, and the multiple second telescopic arms are arranged in the second main arm in a sleeving mode and are arranged in the second main arm in a sliding mode; one end of the folding arm is rotationally connected to the second telescopic arm located on the innermost side in the multiple second telescopic arms, and the other end of the folding arm is rotationally connected to the working bucket; the crawling ladder mechanism is arranged outside the first telescopic assembly and / or the second telescopic arm assembly, the crawling ladder mechanism, the first telescopic assembly and the second telescopic assembly stretch out and draw back synchronously, and rescue is more stable.

Description

Technical Field

[0001] The utility model generally relates to the technical field of fire fighting, and in particular to a fire truck arm structure and a fire truck. Background Art

[0002] Climbing platform fire trucks have been widely used in emergency rescue and fire fighting. Climbing platform fire trucks include booms, which include telescopic straight booms, folding booms and working platforms. The working platform is located at the top and is used for rescue and transportation of materials. Generally, a 50-meter-level climbing platform fire truck has a structure of 5 telescopic straight booms and 1 folding boom, while climbing platform fire trucks above 60 meters are not convenient for assisted climbing due to the high rescue height. At the same time, the extension range of the boom can only be achieved by extending and retracting the telescopic straight boom. Each extension and retraction of the telescopic straight boom will cause the working platform to shake, resulting in poor rescue stability and affecting the safety of the rescue. Utility Model Content

[0003] The utility model provides a fire truck arm structure and a fire truck, which have a wide rescue application range and good rescue stability.

[0004] According to the first aspect of the utility model, a fire truck boom structure is provided, comprising: a first telescopic arm assembly, a second telescopic arm assembly, a folding arm, a ladder mechanism and a working bucket, the first telescopic arm assembly comprising a first main arm and a plurality of first telescopic arms, the first main arm being rotatably connected to a turntable, the plurality of first telescopic arms being mutually sleeved and slidably arranged in the first main arm; the second telescopic arm assembly comprising a second main arm and at least one second telescopic arm, the second main arm being rotatably connected to the first telescopic arm located at the innermost side among the plurality of first telescopic arms, and at least one second telescopic arm being mutually sleeved and slidably arranged in the second main arm; one end of the folding arm being rotatably connected to the second telescopic arm located at the innermost side among at least one second telescopic arm, and the other end being rotatably connected to the working bucket; the ladder mechanism being arranged on the outside of the first telescopic arm assembly and / or the second telescopic arm assembly, the ladder mechanism being synchronously telescopically extended and retracted with the first telescopic arm assembly and the second telescopic arm assembly.

[0005] In some embodiments, in the retracted state, the ladder mechanism is arranged on one side of the first telescopic arm assembly along the first direction, the second telescopic arm and the folding arm are arranged on the other side of the first telescopic arm assembly along the first direction, and the working bucket is arranged on the side of the second telescopic arm assembly away from the first telescopic arm assembly; wherein the first direction is perpendicular to the axial direction of the first telescopic arm assembly.

[0006] In some embodiments, the ladder mechanism includes a first telescopic auxiliary ladder assembly, the first telescopic auxiliary ladder assembly includes a plurality of first telescopic ladders nested with each other, the plurality of first telescopic ladders are correspondingly arranged on the first main arm and the plurality of first telescopic arms; wherein the first telescopic ladder is provided with a first handrail along the first direction and on one side away from the first telescopic arm assembly.

[0007] In some embodiments, the ladder mechanism includes a second telescopic auxiliary ladder assembly, the second telescopic auxiliary ladder assembly includes a plurality of second telescopic ladders nested with each other, the plurality of second telescopic ladders are correspondingly arranged on the second main arm and at least one second telescopic arm; wherein the second telescopic ladder is provided with a second handrail, and the second handrail can be switched between an extended state and a retracted state.

[0008] In some embodiments, the second telescopic auxiliary ladder assembly also includes a swing arm and a driving source, one end of the swing arm is rotatably connected to the second telescopic ladder, and the other end is rotatably connected to the second handrail; the fixed end of the driving source is rotatably connected to the second telescopic ladder, and the output end of the driving source is rotatably connected to the swing arm; wherein a first accommodating groove is provided on a side of the second telescopic ladder facing the second handrail, and the driving source and the swing arm are selectively arranged in the first accommodating groove.

[0009] In some embodiments, the outer wall of the swing arm facing the driving source can fit with the outer arm of the driving source.

[0010] In some embodiments, the driving source is an electric push rod.

[0011] In some embodiments, the second telescopic auxiliary ladder assembly further includes: a column, one end of which is rotatably connected to the second telescopic ladder, and the other end of which is rotatably connected to the second handrail; wherein a second receiving groove is provided on a side of the second telescopic ladder facing the second handrail, and the column is selectively disposed in the second receiving groove.

[0012] In some embodiments, the ladder mechanism further includes: a folding arm auxiliary ladder and an auxiliary step, wherein the folding arm auxiliary ladder is arranged on the folding arm; and the auxiliary step is arranged on a side of the working bucket facing the folding arm auxiliary ladder.

[0013] According to the second aspect of the utility model, an embodiment of the utility model further provides a fire truck, comprising a chassis, a turntable and the above-mentioned fire truck arm structure, wherein the turntable is rotatably arranged on the chassis, and the fire truck arm structure is rotatably connected to the turntable.

[0014] An embodiment of the utility model has the following advantages or beneficial effects:

[0015] The fire truck arm structure provided in this embodiment comprises a first telescopic arm assembly, a second telescopic arm assembly, a folding arm and a working bucket connected in sequence. When working, the first main arm is lifted relative to the turntable, the turntable rotates synchronously, and then the multiple first telescopic arms are extended synchronously. When the lifting angle reaches the required height, the multiple second telescopic arms are extended relative to the second main arm, and finally the folding arm is lifted to bring the working bucket close to the rescue position. At the same time, the ladder mechanism is extended and retracted synchronously with the first telescopic assembly and the second telescopic assembly. The ladder mechanism is used for climbing during emergency rescue, plays a role in assisting rescue, and realizes the transportation and rescue process of personnel. The operating rescue personnel can operate the second main arm, the second telescopic arm and the folding arm without operating the first main arm to complete the precise operation of the rescue point. The fixed first main arm can reduce the shaking of the working bucket, making the rescue more stable, and can cope with more complex high-rise rescue situations.

[0016] This embodiment also provides a fire truck, including a chassis, a turntable and the above-mentioned fire truck arm structure, the turntable is rotatably arranged on the chassis, and the fire truck arm structure is rotatably connected to the turntable to improve the flexibility of the fire truck arm structure and expand the working range of the fire truck arm structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to better understand the utility model, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the utility model. In addition, related elements or components may have different settings as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each of the drawings. By describing its example embodiments in detail with reference to the drawings, the above and other features and advantages of the utility model will become more apparent.

[0018] in:

[0019] Figure 1 What is shown is a structural schematic diagram of a fire truck arm structure from one perspective of an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the fire truck arm structure from another perspective of an embodiment of the utility model;

[0021] Figure 3 The figure shows a schematic structural diagram of a second telescopic auxiliary ladder assembly in a fire truck arm structure in an embodiment of the utility model in a retracted state;

[0022] Figure 4 The figure shows a schematic structural diagram of a second telescopic auxiliary ladder assembly in a fire truck arm structure in an embodiment of the utility model in an extended state;

[0023] Figure 5 The figure shows a schematic structural diagram of a swing arm in a fire truck arm structure according to an embodiment of the utility model;

[0024] Figure 6 Shown is a structural schematic diagram of a driving source in a fire truck arm structure according to an embodiment of the utility model.

[0025] The reference numerals are described as follows:

[0026] 100. Turntable;

[0027] 1. first telescopic arm assembly; 11. first main arm; 12. first telescopic arm;

[0028] 2. Second telescopic arm assembly; 21. Second main arm; 22. Second telescopic arm;

[0029] 3. Folding arm; 4. Working bucket; 5. Ladder mechanism;

[0030] 51. first telescopic auxiliary ladder assembly; 511. first telescopic ladder; 512. first handrail;

[0031] 52, second telescopic auxiliary ladder assembly; 521, second telescopic ladder; 5211, first receiving slot; 5212, second receiving slot; 522, second handrail; 523, swing arm; 524, driving source; 525, column;

[0032] 53. Folding arm auxiliary ladder; 54. Auxiliary steps. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the example embodiments of the utility model to clearly and completely describe the technical solutions in the example embodiments of the utility model. The example embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the utility model. Therefore, it should be understood that various modifications and changes can be made to the example embodiments without departing from the scope of protection of the utility model.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0035] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" 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 this utility model can be understood according to specific circumstances.

[0036] Further, in the description of the present invention, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present invention are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present invention. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", or "inner", "outer", but can also be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0038] like Figure 1-Figure 2 As shown, this embodiment provides a fire truck boom structure, which includes a first telescopic arm assembly 1, a second telescopic arm assembly 2, a folding arm 3, a working bucket 4 and a ladder mechanism 5. The first telescopic arm assembly 1 includes a first main arm 11 and a plurality of first telescopic arms 12, the first main arm 11 is rotatably connected to the turntable 100, and the plurality of first telescopic arms 12 are mutually sleeved and slidably arranged in the first main arm 11; the second telescopic arm assembly 2 includes a second main arm 21 and a plurality of second telescopic arms 22, the second main arm 21 is rotatably connected to the first telescopic arm 12 located at the innermost side of at least one first telescopic arm 12, and at least one second telescopic arm 22 is mutually sleeved and slidably arranged in the second main arm 21; one end of the folding arm 3 is rotatably connected to the second telescopic arm 22 located at the innermost side of at least one second telescopic arm 22, and the other end is rotatably connected to the working bucket 4; the ladder mechanism 5 is arranged outside the first telescopic arm assembly 1 and / or the second telescopic arm assembly 2, and the ladder mechanism 5 is synchronously telescopic with the first telescopic arm assembly 1 and the second telescopic arm assembly 2.

[0039] The fire truck arm structure provided in this embodiment has a first telescopic arm assembly 1, a second telescopic arm assembly 2, a folding arm 3 and a working bucket 4 connected in sequence. When working, the first main arm 11 is lifted relative to the turntable 100, the turntable 100 rotates synchronously, and then the multiple first telescopic arms 12 are extended synchronously. When the lifting angle reaches the required height, the multiple second telescopic arms 22 are extended relative to the second main arm 21, and finally the folding arm 3 is lifted to make the working bucket 4 close to the rescue position. At the same time, the ladder mechanism 5 is synchronously extended and retracted with the first telescopic arm assembly 1 and the second telescopic arm assembly 2. The ladder mechanism 5 is used for climbing during emergency rescue, plays a role in assisting rescue, and realizes the transportation and rescue process of personnel. The operating rescue personnel can operate the second main arm 21, the second telescopic arm 22 and the folding arm 3 without operating the first main arm 11 to complete the precise operation of the rescue point. The first main arm 11 is fixed to reduce the shaking of the working bucket 4, and the rescue is more stable, and it can cope with more complex high-rise rescue conditions.

[0040] Specifically, if the number of the first telescopic arms 12 is four, the first telescopic arm assembly 1 is a five-section structure, and the number of the second telescopic arm 22 is one, the second telescopic arm assembly 2 is a two-section structure, plus a folding arm 3 at the top. At this time, the fire truck arm structure is a "5+2+1" structure, which has a large telescopic and folding range and can cope with more complex rescue conditions.

[0041] It should be noted that the fire truck arm structure has an extended state and a retracted state. When it is needed to work, the fire truck arm structure is in an extended state; when it is not needed to work, the fire truck arm structure is in a retracted state. Among them, the first direction is perpendicular to the axial direction of the first telescopic arm assembly 1, and the first direction can be the front-back direction of the first telescopic arm assembly 1. The first direction is marked with D1, and the second direction is a vertical direction, and the second direction is marked with D2. The axial direction of the first telescopic arm 12 is marked with the third direction D3. Since the first telescopic arm assembly 1 rotates relative to the turntable 100, the axial direction D3 of the first telescopic arm 12 actually changes. When the fire truck arm structure is in a retracted state, if the axial direction of the first telescopic arm 12 is parallel to the horizontal plane, the first direction, the second direction and the third direction are mutually perpendicular. The second direction is actually fixed, but the first direction and the third direction will change with the position of the turntable 100 and the lifting angle of the first telescopic arm assembly 1.

[0042] In one embodiment, in the retracted state, the climbing mechanism 5 is arranged on one side of the first telescopic arm assembly 1 along the first direction, the second telescopic arm 22 and the folding arm 3 are arranged on the other side of the first telescopic arm assembly 1 along the first direction, and the working bucket 4 is arranged on the side of the second telescopic arm assembly 2 away from the first telescopic arm assembly 1.

[0043] When the fire truck arm structure is in the retracted state, the multiple first telescopic arms 12 of the first telescopic arm assembly 1 are retracted in the first main arm 11. Along the first direction, the ladder mechanism 5 is arranged on one side of the first telescopic arm assembly 1, and the second telescopic arm assembly 2 and the folding arm 3 are arranged on the other side of the first telescopic arm assembly 1 to ensure the balance of the overall center of gravity of the fire truck arm structure. The working bucket 4 is arranged on the side of the second telescopic arm assembly 2 away from the first telescopic arm assembly 1, that is, the working bucket 4 is located directly below the first main arm 11, using the balance of the overall arrangement. At the same time, arranging the second telescopic arm assembly 2, the folding arm 3 and the working bucket 4 on the same side of the first telescopic arm assembly 1 is also conducive to controlling the operation and observation of the entire fire truck arm structure during lifting.

[0044] In one embodiment, Figure 1-Figure 2 As shown, the ladder mechanism 5 includes a first telescopic auxiliary ladder assembly 51, and the first telescopic auxiliary ladder assembly 51 includes a plurality of first telescopic ladders 511 which are nested with each other. The plurality of first telescopic ladders 511 are correspondingly arranged on the first main arm 11 and the plurality of first telescopic arms 12, so that the first telescopic auxiliary ladder assembly 51 moves synchronously with the first telescopic arm assembly 1, ensuring that the first telescopic arm assembly 1 has a corresponding first telescopic auxiliary ladder assembly 51 of the same length regardless of any telescopic state, thereby ensuring the timeliness and reliability of the rescue.

[0045] The first telescopic ladder 511 is provided with a first handrail 512 on one side thereof along the first direction and away from the first telescopic arm assembly 1. When the rescuer climbs the first telescopic ladder 511, the first handrail 512 serves as a limit, and the first handrail 512 is used for support, which is safe.

[0046] It can be understood that, no matter in the extended state or the retracted state, the first telescopic auxiliary ladder assembly 51 is arranged on one side of the first telescopic arm assembly 1 along the first direction, so the first telescopic ladder 511 will not interfere with other components; the first handrail 512 is fixedly arranged relative to the first telescopic ladder 511, and the first handrail 512 and the first telescopic ladder 511 can be directly rigidly connected by bolts or welding, thereby saving production costs.

[0047] In one embodiment, Figure 1-Figure 3 As shown, the ladder mechanism 5 includes a second telescopic auxiliary ladder assembly 52, and the second telescopic auxiliary ladder assembly 52 includes a plurality of second telescopic ladders 521 which are nested with each other. The plurality of second telescopic ladders 521 are correspondingly arranged on the second main arm 21 and at least one second telescopic arm 22, so that the second telescopic auxiliary ladder assembly 52 moves synchronously with the second telescopic arm assembly 2, ensuring that the second telescopic arm assembly 2 has a corresponding second telescopic auxiliary ladder assembly 52 of the same length regardless of any telescopic state, thereby ensuring the timeliness and reliability of the rescue.

[0048] Specifically, in the extended state, the second telescopic arm assembly 2 and the first telescopic arm assembly 1 are coaxially arranged, that is, the second main arm 21, the second telescopic arm 22, the first main arm 11 and the first telescopic arm 12 are collinear; in the contracted state, the second telescopic arm assembly 2 is folded relative to the first telescopic arm assembly 1, and the second telescopic arm assembly 2 is located on one side of the first telescopic arm assembly 1 along the first direction and away from the first telescopic sub-ladder assembly 51, that is, the second telescopic arm assembly 2 is located on the outside of the first telescopic arm assembly 1, thereby reducing position interference between the second telescopic arm assembly 2 and the first telescopic sub-ladder assembly 51.

[0049] The second telescopic ladder 521 is provided with a second handrail 522. When the rescuer climbs the second telescopic ladder 521, the second handrail 522 plays a role of limiting, and the second handrail 522 is used for support, which is safe.

[0050] In the folded state, the second armrest 522 is arranged below the second telescopic ladder 521 along the second direction, not upward. Compared with the armrest peripheral, the second telescopic ladder 521 can protect the second armrest 522 arranged downward, which is not easy to be rusted by rainwater, reduces the failure rate, and prolongs the service life.

[0051] Since the second telescopic arm assembly 2 is arranged between the first telescopic arm assembly 1 and the folding arm 3, that is, the second telescopic arm assembly 2 is located in the middle position, when in the folded state, the second telescopic secondary ladder assembly 52 will be arranged toward the folding arm 3 and the working bucket 4, resulting in the risk of interference between the second handrail 522 arranged downward along the second direction and the folding arm 3 and the working bucket 4.

[0052] To solve this problem, Figure 3-Figure 4 As shown, the second armrest 522 can be switched between an extended state and a retracted state.

[0053] When the fire truck arm structure is in an extended state, the second handrail 522 is also in an extended state, and there is a certain height distance between the second handrail 522 and the second telescopic ladder 521, which is convenient for rescue personnel to grab the second handrail 522 and climb the second telescopic ladder 521; when the fire truck arm structure is in a retracted state, the second handrail 522 is also in a retracted state, and the second handrail 522 and the second telescopic ladder 521 fit each other, with a neat overall appearance and good consistency, and the second handrail 522 can be folded and retracted without interfering with components such as the folding arm 3 and the working bucket 4, which is conducive to the use of the retracted space.

[0054] In one embodiment, Figure 4-Figure 6As shown, the second telescopic auxiliary ladder assembly 52 also includes a swing arm 523 and a driving source 524, one end of the swing arm 523 is rotatably connected to the second telescopic ladder 521, and the other end is rotatably connected to the second handrail 522, the fixed end of the driving source 524 is rotatably connected to the second telescopic ladder 521, and the output end of the driving source 524 is rotatably connected to the swing arm 523.

[0055] Specifically, a swing arm 523 is installed at the output end of the driving source 524. The swing arm 523 has three hinged positions, two of which are respectively connected to the side beam of the second telescopic ladder 521 and the second handrail 522, and play the role of lifting and retracting the second handrail 522. Another hinged position is approximately in the middle and lower position of the swing arm 523. The hinged position is connected to the top output end of the driving source 524. When the driving source 524 starts, the second handrail 522 is lifted up by the swing arm 523, so that there is a certain height distance between the second handrail 522 and the side beam of the second telescopic ladder 521. At the same time, the three hinged positions can be set in the middle of the width direction or the length direction of the swing arm 523, so that the external force acting on the swing arm 523 is balanced and fatigue cracks will not be generated.

[0056] The driving source 524 is an electric push rod. Compared with the existing hydraulic cylinder drive, the electric push rod is small in size and light in weight, which is conducive to reducing the overall weight of the second telescopic auxiliary ladder assembly 52 and meeting the demand for lightweight.

[0057] Specifically, the number of the electric push rods is an even number, and the electric push rods are used in pairs, so that the force is evenly distributed, and the second armrest 522 will not be tilted.

[0058] In one embodiment, Figure 3-Figure 6 As shown, a first receiving groove 5211 is provided on one side of the second telescopic ladder 521 facing the second handrail 522 , and the driving source 524 and the swing arm 523 are selectively disposed in the first receiving groove 5211 .

[0059] When in the retracted state, the driving source 524 and the swing arm 523 can both be arranged in the first accommodating groove 5211, that is, hidden in the inner wall of the second telescopic ladder 521, with a beautiful appearance, and the second telescopic ladder 521 plays a role of waterproof and dustproof. The driving source 524 and the swing arm 523 are not easy to rust, thereby realizing isolation and protection of the driving source 524 and the swing arm 523.

[0060] In one embodiment, Figure 3-Figure 6 As shown, the outer wall of the swing arm 523 facing the driving source 524 can fit with the driving source 524.

[0061] When switching from the extended state to the retracted state, under the action of the driving source 524, the swing arm 523 moves in the direction close to the driving source 524, and the outer wall of the swing arm 523 facing the driving source 524 can fit with the driving source 524, so that the outer contours of the swing arm 523 and the driving source 524 fit better, so that the swing arm 523 can complete the retraction inside the side beam of the second telescopic ladder 521.

[0062] Specifically, when the driving source 524 is an arc-shaped structure, such as a cylindrical structure, the side of the swing arm 523 facing the driving source 524 is also an arc-shaped structure, achieving a conformal effect between the swing arm 523 and the outer wall of the driving source 524, further improving the storage and hiding effects.

[0063] In one embodiment, Figure 3-Figure 4 As shown, the second telescopic auxiliary ladder assembly 52 further includes a column 525 , one end of which is rotatably connected to the second telescopic ladder 521 , and the other end of which is rotatably connected to the second handrail 522 .

[0064] The column 525 serves to auxiliary support the second handrail 522, ensuring the position stability of the second handrail 522 in the extended state, and the two ends of the column 525 are rotatably connected to the second telescopic ladder 521 and the second handrail 522 respectively. The column 525 is not a fixed setting but a movable setting. The column 525 serves as a follower and can rotate with the rotation of the swing arm 523.

[0065] A second receiving groove 5212 is provided on one side of the second telescopic ladder 521 facing the second handrail 522 , and the column 525 is selectively disposed in the second receiving groove 5212 .

[0066] When in the retracted state, the column 525 can be set in the second accommodating groove 5212, that is, hidden in the inner wall of the second telescopic ladder 521, with a beautiful appearance, and the second telescopic ladder 521 plays a role of waterproof and dustproof. The column 525 is not easy to rust, thereby achieving isolation and protection of the column 525.

[0067] Specifically, there are multiple columns 525, which are divided into two columns. The two columns 525 are respectively arranged corresponding to two second handrails 522, and each column of columns 525 is arranged at intervals along the extension direction of the second handrail 522 to improve the supporting stability of the second handrail 522.

[0068] In one embodiment, the ladder mechanism 5 further includes a folding arm auxiliary ladder 53 and an auxiliary step 54 (such as Figure 1 As shown), the folding arm auxiliary ladder 53 is arranged on the folding arm 3, and the auxiliary step 54 is arranged on the side of the working bucket 4 facing the folding arm auxiliary ladder 53.

[0069] The first telescopic auxiliary ladder assembly 51, the second telescopic auxiliary ladder assembly 52, the folding arm auxiliary ladder 53 and the auxiliary step 54 cooperate to form a connectable climbing passage, so that the rescue passage extends from the tail end of the first main arm 11 to the top of the working bucket 4, thereby improving the safety and reliability of the rescue.

[0070] This embodiment further provides a fire truck, including a chassis, a turntable 100 and the above-mentioned fire truck arm structure, the turntable 100 is rotatably arranged on the chassis, and the fire truck arm structure is rotatably connected to the turntable 100.

[0071] Optionally, the turntable 100 includes a first part and a second part, the first part of the turntable 100 is used to connect to the chassis, and the second part of the turntable 100 is connected to one end of the first main arm 11 through a first pin. Optionally, the center line of the turntable 100 and the axis of the first pin are perpendicular to each other. The fire truck arm structure can rotate relative to the chassis around the center line of the turntable 100 through the turntable 100, and the fire truck arm structure can rotate relative to the turntable 100 around the axis of the first pin, so as to improve the flexibility of the fire truck arm structure and expand the working range of the fire truck arm structure.

[0072] It should be noted that the fire truck arm structure shown in the drawings and described in this specification is only an example of the principle of the present invention. It should be clearly understood by those skilled in the art that the principle of the present invention is not limited to any details or any components of the device shown in the drawings or described in the specification.

[0073] It should be understood that the utility model does not limit its application to the detailed structure and arrangement of the components proposed in this specification. The utility model can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned deformation forms and modified forms fall within the scope of the utility model. It should be understood that the utility model disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the utility model. The embodiments described in this specification illustrate the best known methods for implementing the utility model and will enable those skilled in the art to utilize the utility model.

[0074] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variation, use, or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and example embodiments are to be considered as exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

[0075] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of protection of the present invention is limited only by the appended claims.

Claims

1. A fire truck boom structure, characterized in that: include: A first telescopic arm assembly comprises a first main arm and a plurality of first telescopic arms, wherein the first main arm is rotatably connected to the turntable, and the plurality of first telescopic arms are mutually sleeved and slidably disposed in the first main arm; A second telescopic arm assembly comprises a second main arm and at least one second telescopic arm, wherein the second main arm is rotatably connected to the innermost first telescopic arm among the plurality of first telescopic arms, and at least one second telescopic arm is mutually sleeved and slidably disposed in the second main arm; A folding arm and a working bucket, wherein one end of the folding arm is rotatably connected to the innermost second telescopic arm of at least one of the second telescopic arms, and the other end is rotatably connected to the working bucket; The ladder mechanism is arranged outside the first telescopic arm assembly and / or the second telescopic arm assembly, and the ladder mechanism is synchronously extended and retracted with the first telescopic arm assembly and the second telescopic arm assembly.

2. The fire truck arm structure according to claim 1, characterized in that: In the retracted state, the ladder mechanism is arranged on one side of the first telescopic arm assembly along the first direction, the second telescopic arm and the folding arm are arranged on the other side of the first telescopic arm assembly along the first direction, and the working bucket is arranged on the side of the second telescopic arm assembly away from the first telescopic arm assembly; Wherein, the first direction is perpendicular to the axial direction of the first telescopic arm assembly.

3. The fire truck arm structure according to claim 2, characterized in that: The ladder mechanism comprises a first telescopic auxiliary ladder assembly, the first telescopic auxiliary ladder assembly comprises a plurality of first telescopic ladders which are mutually nested, and the plurality of first telescopic ladders are correspondingly arranged on the first main arm and the plurality of first telescopic arms; Wherein, a first handrail is provided on the first telescopic ladder along the first direction and on a side away from the first telescopic arm assembly.

4. The fire truck arm structure according to claim 2, characterized in that: The ladder mechanism includes a second telescopic auxiliary ladder assembly, the second telescopic auxiliary ladder assembly includes a plurality of second telescopic ladders nested with each other, and the plurality of second telescopic ladders are correspondingly arranged on the second main arm and at least one second telescopic arm; Wherein, the second telescopic ladder is provided with a second handrail, and the second handrail can be switched between an extended state and a retracted state.

5. The fire truck arm structure according to claim 4, characterized in that: The second telescopic auxiliary ladder assembly also includes: a swing arm, one end of which is rotatably connected to the second telescopic ladder, and the other end of which is rotatably connected to the second handrail; A driving source, wherein a fixed end of the driving source is rotatably connected to the second telescopic ladder, and an output end of the driving source is rotatably connected to the swing arm; Wherein, a first accommodating groove is provided on a side of the second telescopic ladder facing the second handrail, and the driving source and the swing arm are selectively arranged in the first accommodating groove.

6. The fire truck arm structure according to claim 5, characterized in that: The outer wall of the swing arm facing the driving source can fit with the outer arm of the driving source.

7. The fire truck arm structure according to claim 5, characterized in that: The driving source is an electric push rod.

8. The fire truck boom structure according to claim 5, characterized in that: The second telescopic auxiliary ladder assembly also includes: A column, one end of which is rotatably connected to the second telescopic ladder, and the other end of which is rotatably connected to the second handrail; Wherein, a second receiving groove is provided on a side of the second telescopic ladder facing the second handrail, and the column is selectively arranged in the second receiving groove.

9. The fire truck boom structure according to any one of claims 1 to 8, characterized in that: The ladder climbing mechanism also includes: A folding arm auxiliary ladder, arranged on the folding arm; An auxiliary step is arranged on a side of the working bucket facing the folding arm auxiliary ladder.

10. A fire truck, characterized in that: The fire truck comprises a chassis, a turntable and a fire truck arm structure as claimed in any one of claims 1 to 9, wherein the turntable is rotatably arranged on the chassis, and the fire truck arm structure is rotatably connected to the turntable.

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