Cantilever crane forward-moving prevention device and elevating fire truck

Abstract

The utility model relates to the field of elevating fire fighting trucks, and discloses a boom anti-forward-moving device and an elevating fire fighting truck, the boom anti-forward-moving device comprises a main boom anti-collision block, the main boom anti-collision block is provided with an anti-collision block mounting hole extending in the axial direction of a main boom, and the main boom anti-collision block can be fixed on the main boom through a fastener arranged in the anti-collision block mounting hole in a penetrating mode; the limiting piece is arranged in front of the main arm anti-collision block in the axial direction; the crank arm anti-collision block is fixedly installed on the crank arm and arranged behind the main arm anti-collision block in the axial direction when the arm frame is folded and retracted. According to the boom forward movement preventing device and the elevating fire truck, forward movement of the telescopic boom can be effectively prevented, and the safety is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of aerial firefighting vehicles, and particularly relates to an arm frame anti-forward-jumping device and an aerial firefighting vehicle. BACKGROUND

[0002] An aerial firefighting vehicle refers to a firefighting vehicle equipped with a support system, a rotating platform, an arm frame, and a firefighting device and a work bucket, and can be used for firefighting and rescue. When the aerial firefighting vehicle is driving on a road and suddenly brakes, the arm frame may jump forward, and if there are vehicles, pedestrians or other obstacles in front, a collision may occur and cause an accident. SUMMARY

[0003] The present application aims to provide an arm frame anti-forward-jumping device and an aerial firefighting vehicle, which can effectively prevent the forward jumping of the telescopic arm frame and have high safety.

[0004] To achieve the above-mentioned purpose, the present application provides an arm frame anti-forward-jumping device, which comprises:

[0005] A main arm anti-collision block having an anti-collision block mounting hole extending along the axial direction of the main arm, the main arm anti-collision block being capable of being fixed on the main arm by means of fasteners arranged in the anti-collision block mounting hole;

[0006] A limiting member arranged in front of the main arm anti-collision block along the axial direction;

[0007] A curved arm anti-collision block fixedly installed on the curved arm and arranged behind the main arm anti-collision block along the axial direction in the folded and retracted state of the arm frame.

[0008] In some specific embodiments, the arm frame anti-forward-jumping device further comprises a base, a base body portion of the base being fixed on the main arm, and the main arm anti-collision block being connected to the base body portion by means of the fasteners to be fixed on the main arm.

[0009] In some specific embodiments, the base comprises a limiting member fixing portion, the limiting member fixing portion extending from the base body portion towards a direction away from the main arm and being arranged in front of the main arm anti-collision block along the axial direction, and the limiting member being arranged on the limiting member fixing portion.

[0010] In some specific embodiments, the limiting member comprises a plurality of bolt members threadedly connected to the limiting member fixing portion.

[0011] In some specific embodiments, the base comprises an upper limiting portion, the upper limiting portion extending from the base body portion towards a direction away from the main arm and being arranged above the curved arm anti-collision block in the folded and retracted state of the arm frame, and an upper limiting block being arranged on the upper limiting portion.

[0012] In some specific embodiments, the base body part, the upper side limiting part and the limiting part fixing part are three mutually perpendicular connected plate bodies.

[0013] And / or, the base is an integrally formed part.

[0014] In some specific embodiments, the base comprises a side limiting block arranged on the base body part and arranged behind the main arm anti-collision block along the axial direction.

[0015] In some specific embodiments, the number of anti-collision block mounting holes is multiple, multiple anti-collision block mounting holes are arranged in a vertical direction, and multiple fasteners are arranged in each anti-collision block mounting hole.

[0016] And / or, the main arm anti-collision block is in contact with the curved arm anti-collision block along the axial direction in the arm support folding and retracting state.

[0017] In some specific embodiments, the curved arm anti-collision block is a box-shaped structural part, and the vertical projection on the horizontal plane is a right-angled trapezoid, and the right-angled waist of the right-angled trapezoid is arranged relatively close to the main arm anti-collision block.

[0018] The second aspect of the present application provides a fire raising truck, which comprises:

[0019] A main arm;

[0020] A curved arm;

[0021] The arm support anti-forward running device described above, the main arm anti-collision block is arranged on the side wall of the main arm close to the curved arm in the arm support folding and retracting state, and the curved arm anti-collision block is arranged on the side wall of the curved arm close to the main arm in the arm support folding and retracting state.

[0022] Through the above technical solution, the main arm anti-collision block is fixed on the main arm, the curved arm anti-collision block is fixed on the curved arm, the main arm anti-collision block is arranged in front of the curved arm anti-collision block along the axial direction of the main arm in the arm support folding and retracting state, and the curved arm anti-collision block can be stopped, so that the danger of the telescopic arm section running forward due to great inertia when the telescopic arm section is at a negative angle or during driving braking can be avoided. And by arranging the limiting part, the displacement freedom degree of the arm support in the forward movement direction can be further limited when the curved arm anti-collision block collides with the main arm anti-collision block, the arm support forward running phenomenon is fundamentally eliminated, and the driving safety of the fire raising truck is ensured.

[0023] Other features and advantages of the embodiments of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of embodiments of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain these embodiments of the application. The drawings provided herein are for illustrative purposes only and, as such, do not limit the scope of the application. For the purpose of clarity, not all of the various components of the embodiments of the application are shown in the drawings. In the drawings:

[0025] Figure 1 A bottom view of the arm support anti-forward movement device is shown in one embodiment of the application;

[0026] Figure 2 A structure diagram of the curved arm anti-collision block in Figure 1 is shown;

[0027] Figure 3 A structure diagram of the main arm anti-collision block, limiting member and base in Figure 2 is shown.

[0028] Explanation of reference signs

[0029] 1 main arm anti-collision block 11 anti-collision block mounting hole

[0030] 2 curved arm anti-collision block 3 limiting member

[0031] 4 base 41 base body part

[0032] 42 limiting member fixing part 43 upper side limiting part

[0033] 5 fastener 6 upper side limiting block

[0034] 7 side limiting block 200 main arm

[0035] 201 main arm side wall 202 main arm bottom wall

[0036] 300 curved arm 301 curved arm side wall

[0037] 302 curved arm bottom wall DETAILED DESCRIPTION

[0038] Embodiments of the application will be described in detail below with reference to the drawings. It should be understood that the embodiments described herein are merely intended to illustrate and explain the application, and are not intended to limit the application.

[0039] The prior art provides a telescopic mechanism cylinder for a high-lift arm, which is a one-way locking type. When the high-lift arm slips forward due to a huge inertia at a negative angle or during braking, the telescopic cylinder extends in the direction of the slip of the high-lift arm. In particular, during downhill braking, the extension length accumulates continuously, which affects the driving safety. Currently, there are two measures to prevent the forward movement of the arm. One is to increase the friction between the high-lift arms, and the other is to compensate the pressure of the telescopic cylinder. Although the measures such as increasing the friction between the high-lift arms are taken from the structure, it is still difficult to solve the problem of the forward movement of the high-lift arm. The corresponding improvement of the hydraulic system can limit the forward movement of the telescopic cylinder, but due to the existing gap between the high-lift arms and the stretching deformation of the steel wire rope of the high-lift arm, the improvement of the hydraulic system alone cannot completely eliminate the forward movement of the high-lift arm.

[0040] Therefore, the first aspect of the present application provides an arm anti-forward movement device, which comprises a main arm anti-collision block 1, a curved arm anti-collision block 2 and a limiting piece 3. The main arm anti-collision block 1 has an anti-collision block mounting hole 11 extending in the axial direction of the main arm 200, and the main arm anti-collision block 1 can be fixed on the main arm 200 by means of a fastener 5 arranged in the anti-collision block mounting hole 11. The limiting piece 3 is arranged in front of the main arm anti-collision block 1 in the axial direction, and the curved arm anti-collision block 2 is fixedly installed on the curved arm 300 and arranged behind the main arm anti-collision block 1 in the axial direction in the folded and retracted state of the arm.

[0041] As shown in Figure 1 and Figure 3 , the main arm anti-collision block 1 is fixed on the main arm 200, and the anti-collision block mounting hole 11 is a waist-shaped counterbore extending in the axial direction of the main arm 200. The curved arm anti-collision block 2 is fixed on the curved arm 300, and the main arm anti-collision block 1 is arranged in front of the curved arm anti-collision block 2 in the axial direction of the main arm 200 in the folded and retracted state of the arm, i.e. the main arm anti-collision block 1 and the curved arm anti-collision block 2 are arranged side by side in the front-rear direction between the main arm 200 and the curved arm 300, which can stop the curved arm anti-collision block 2, thereby avoiding the dangerous situation of the telescopic arm moving forward due to a huge inertia at a negative angle or during braking. Moreover, by arranging the limiting piece 3 in front of the main arm anti-collision block 1 in the axial direction, when the high-lift fire truck is suddenly braked, the curved arm 300 moves forward due to inertia, collides with the main arm anti-collision block 1, the main arm anti-collision block 1 moves relative to the fastener 5 and the main arm 200 along the anti-collision block mounting hole 11, and finally collides with the limiting piece 3. In this way, the displacement freedom degree of the arm in the forward movement direction can be further limited when the curved arm anti-collision block 2 collides with the main arm anti-collision block 1, which fundamentally eliminates the forward movement of the arm and ensures the driving safety of the high-lift fire truck.

[0042] It should be noted that the shapes of the main arm anti-collision block 1, the curved arm anti-collision block 2, the limiting piece 3 and the anti-collision block mounting hole 11 can be various, and the main arm anti-collision block 1 and the curved arm anti-collision block 2 can be square, rhombus or other irregular shapes, etc. The main arm anti-collision block 1 and the curved arm anti-collision block 2 can be directly arranged on the main arm 200 and the curved arm 300, or can also be arranged on the main arm 200 and the curved arm 300 through the base. The limiting piece 3 can be a block or a bolt, etc., and the limiting piece 3 can be directly arranged on the main arm 200 or arranged on the main arm 200 through the base. The anti-collision block mounting hole 11 can be a rectangular hole, a round head long hole or a hole of other shapes, etc.

[0043] Optionally, as shown in Figure 1 and Figure 3 , the arm support anti-fronting device can further include a base 4, a base body part 41 of the base 4 is fixed on the main arm 200, and the main arm anti-collision block 1 is connected with the base body part 41 through a fastener 5 to be fixed on the main arm 200. In this way, when the main arm anti-collision block 1 moves relative to the fastener 5 and the main arm 200 along the anti-collision block mounting hole 11, it will not cause abrasion to the main arm 200. Moreover, the base body part 41 is plate-shaped and welded above the side arm support of the main arm 200, so that the overall structural strength is higher.

[0044] Further, as shown in Figure 1 and Figure 3 , the base 4 includes a limiting piece fixing part 42, the limiting piece fixing part 42 extends from the base body part 41 in a direction away from the main arm 200 and is arranged in front of the main arm anti-collision block 1 along the axial direction, and the limiting piece 3 is arranged on the limiting piece fixing part 42, so that the overall structure of the arm support anti-fronting device is more reasonable and compact, and the manufacturing cost is low.

[0045] Still further, in order to make the overall structure of the arm support anti-fronting device more reasonable and simple, the limiting piece 3 includes a plurality of bolt pieces threadedly connected with the limiting piece fixing part 42. The bolt pieces are easy to obtain, and the maintenance cost is low. In addition, the bolt pieces are threadedly connected with the limiting piece fixing part 42, so that the spacing between the bolt pieces and the main arm anti-collision block 1 can be flexibly adjusted according to the actual manufacturing and assembly errors, so that the use of the arm support anti-fronting device is more flexible, and the adaptability is good. Specifically, as shown in Figure 1 and Figure 3 , the limiting piece 3 includes two groups of bolt pieces, which are arranged side by side in front of the main arm anti-collision block 1 along the up-down direction and are threadedly fixed on the limiting piece fixing part 42.

[0046] Optionally, as shown in Figure 1 and Figure 3As shown, the base 4 further comprises an upper side limiting part 43 which extends from the base body part 41 towards a direction away from the main arm 200 and is arranged above the elbow anti-collision block 2 in the arm support folding and retracting state, and an upper side limiting block 6 is arranged on the upper side limiting part 43. The upper side limiting block 6 is plate-shaped and is fixed on the upper side limiting part 43 by fasteners, and the upper side limiting block 6 is perpendicular to the main arm side wall 201 at an angle of 90°. When the arm support of the aerial platform fire truck is retracted after the work is completed, the upper side limiting block 6 can limit the displacement degree of the elbow in the upward direction, thereby limiting the displacement degree of the elbow anti-collision block 2 in the elbow luffing and retracting process, ensuring that the elbow cylinder luffing and retracting is in place and the operation safety of the aerial platform fire truck.

[0047] Optionally, the base 4 comprises a side limiting block 7 which is arranged on the base body part 41 and is arranged behind the main arm anti-collision block 1 in the axial direction. The side limiting block 7 is plate-shaped and is fixed on the base body part 41 by fasteners, and the side limiting block 7 is arranged in parallel with the main arm side wall 201, and the side limiting block 7 is arranged at an angle of 90° with the upper side limiting block 6. When the arm support of the aerial platform fire truck is retracted after the work is completed, the side limiting block 7 limits the displacement degree of the elbow in the horizontal direction, thereby limiting the displacement degree of the elbow anti-collision block 2 in the elbow luffing and retracting process, ensuring that the elbow cylinder luffing and retracting is in place and the operation safety of the aerial platform fire truck.

[0048] Optionally, as shown, Figure 3 The base body part 41, the upper side limiting part 43 and the limiting part fixing part 42 are three mutually perpendicular plates, so that the strength of the base 4 is higher, the reliability is better, the structure of the arm support anti-forward movement device is more simple and compact, the weight is lighter, and the manufacturing cost is lower. Further, the upper side limiting part 43 and the limiting part fixing part 42 are respectively provided with reinforcing rib plates between the base body part 41; further, the base 4 is an integral molding part.

[0049] Optionally, when the main arm anti-collision block 1 moves relative to the fastener 5 and the main arm 200 along the anti-collision block mounting hole 11, in order to ensure that the main arm anti-collision block 1 can stably move along the axial direction of the main arm 200, the number of anti-collision block mounting holes 11 is multiple, the multiple anti-collision block mounting holes 11 are arranged in the vertical direction, and multiple fasteners 5 are arranged in each anti-collision block mounting hole 11. As shown, Figure 3 The number of anti-collision block mounting holes 11 is two, and the two anti-collision block mounting holes 11 are arranged in the vertical direction, and two fasteners 5 are arranged in each anti-collision block mounting hole 11.

[0050] Optionally, the main arm anti-collision block 1 contacts the elbow anti-collision block 2 in the axial direction in the arm support folding and retracting state. In this way, the distance from the collision point to the elbow 300 and the distance from the collision point to the main arm 200 can be reduced, thereby reducing the force moment and ensuring the driving safety of the aerial platform fire truck.

[0051] Optionally, in order to make the arm frame anti-forward movement device give consideration to light weight, sufficient structural strength and low manufacturing cost at the same time, the curved arm anti-collision block 2 is a box-shaped structural member. Moreover, the vertical projection of the curved arm anti-collision block 2 on the horizontal plane is a right-angled trapezoid, the right angle waist of the right-angled trapezoid is arranged relatively close to the main arm anti-collision block 1, and correspondingly, the inclined waist of the right-angled trapezoid is arranged relatively far away from the main arm anti-collision block 1, and the long bottom side of the right-angled trapezoid is connected with the curved arm side wall 301, so that the structural strength of the arm frame anti-forward movement device can be higher. Specifically, as shown in Figure 2 the curved arm anti-collision block 2 is a box-shaped structure welded by four thin plates, and the anti-collision base is welded at the position close to the upper surface of the curved arm side wall 301.

[0052] The second aspect of the present application provides a fire fighting truck, as shown in Figure 1 the fire fighting truck includes a main arm 200, a curved arm 300 and the above-mentioned arm frame anti-forward movement device, the main arm bottom wall 202 and the curved arm bottom wall 302 are directed downward, the main arm anti-collision block 1 is arranged on the side wall of the main arm 200 close to the curved arm 300 in the arm frame folding and retracting state, and the curved arm anti-collision block 2 is arranged on the side wall of the curved arm 300 close to the main arm 200 in the arm frame folding and retracting state. When the fire fighting truck is suddenly braked, the curved arm 300 moves forward due to inertia, driving the curved arm anti-collision block 2 to collide with the main arm anti-collision block 1, and the main arm anti-collision block 1 moves along the anti-collision block mounting hole 11 relative to the fastener 5 and the main arm 200, and finally collides with the limiting member 3. Since the fire fighting truck includes the above-mentioned arm frame anti-forward movement device, it also has all the technical effects brought by the arm frame anti-forward movement device.

[0053] In summary, the arm frame anti-forward movement device and the fire fighting truck of the present application limit the displacement degree of freedom of the main arm anti-collision block in the forward movement direction of the arm frame through four groups of longitudinal limiting bolts and two groups of transverse limiting bolts, to ensure the driving safety of the fire fighting truck. Moreover, by arranging the curved arm anti-collision block and the main arm anti-collision block side by side in front and back, the distance from the collision point to the curved arm and the distance from the collision point to the main arm are reduced, so that the force moment is reduced, and the driving safety of the fire fighting truck is ensured. In addition, by using the upper limiting block and the side limiting block in cooperation, the displacement degree of freedom of the curved arm anti-collision block in the curved arm luffing and retracting process is limited, to ensure the operation safety of the fire fighting truck.

[0054] In the description of the present application, it should be understood that the terms “first”, “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “a plurality of” is at least two, such as two, three, etc., unless otherwise specifically limited.

[0055] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0056] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description 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 appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0057] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An anti-creep device for a boom, characterized in that, The arm support anti-forward movement device comprises a main arm anti-collision block (1) having an anti-collision block mounting hole (11) extending along an axial direction of a main arm (200), the main arm anti-collision block (1) being capable of being fixed on the main arm (200) through a fastener (5) threaded in the anti-collision block mounting hole (11); a limiting member (3) disposed in front of the main arm anti-collision block (1) along the axial direction; and a curved arm anti-collision block (2) fixedly mounted on a curved arm (300) and disposed behind the main arm anti-collision block (1) along the axial direction in an arm support folding and retracting state. The arm support anti-forward movement device further comprises a base (4), a base body portion (41) of the base (4) being fixed on the main arm (200), and the main arm anti-collision block (1) being connected with the base body portion (41) through the fastener (5) to be fixed on the main arm (200). The base (4) comprises a limiting member fixing portion (42) extending from the base body portion (41) towards a direction away from the main arm (200) and disposed in front of the main arm anti-collision block (1) along the axial direction, and the limiting member (3) is disposed on the limiting member fixing portion (42). The limiting member (3) comprises a plurality of bolt members threadedly connected with the limiting member fixing portion (42).

2. The catwalk anti-walkoff device of claim 1, wherein, The base (4) comprises an upper side limiting portion (43) extending from the base body portion (41) towards a direction away from the main arm (200) and disposed above the curved arm anti-collision block (2) in the arm support folding and retracting state, and an upper side limiting block (6) is arranged on the upper side limiting portion (43).

3. The catwalk anti-walkoff device of claim 2, wherein, The base body portion (41), the upper side limiting portion (43) and the limiting member fixing portion (42) are three plate bodies connected with each other perpendicularly.

4. The catwalk anti-walkoff device of claim 3, wherein, The base (4) comprises a side limiting block (7) disposed on the base body portion (41) and disposed behind the main arm anti-collision block (1) along the axial direction.

5. The catwalk anti-walkoff device of claim 3, wherein, The number of the anti-collision block mounting holes (11) is multiple, the multiple anti-collision block mounting holes (11) are arranged in a vertical direction, and a plurality of fasteners (5) are threaded in each of the anti-collision block mounting holes (11).

6. The catwalk anti-walkoff device of claim 5, wherein, And / or, the main arm anti-collision block contacts the curved arm anti-collision block along the axial direction in the arm support folding and retracting state.

7. The catwalk anti-walkoff device of claim 2, wherein, The curved arm anti-collision block (2) is a box-shaped structural member, and a vertical projection of the curved arm anti-collision block (2) on a horizontal plane is a right-angled trapezoid, and a right-angled waist of the right-angled trapezoid is arranged relatively close to the main arm anti-collision block (1).

8. The catwalk anti-walkoff device of claim 1, wherein, The arm support anti-forward movement device comprises a main arm (200); a curved arm (300); and the arm support anti-forward movement device according to any one of claims 1 to 9, the main arm anti-collision block (1) being disposed on a side wall of the main arm (200) close to the curved arm (300) in an arm support folding and retracting state, and the curved arm anti-collision block (2) being disposed on a side wall of the curved arm (300) close to the main arm (200) in the arm support folding and retracting state. ​ 9. The catwalk anti-walkoff device of claim 1, wherein, ​ 10. An aerial apparatus, comprising: ​ ​ ​ ​

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