WO2022105241A1

WO2022105241A1 - Boom device and operation vehicle

Info

Publication number: WO2022105241A1
Application number: PCT/CN2021/103585
Authority: WO
Inventors: 邓彪; 李江波; 徐大鹏
Original assignee: 三一汽车制造有限公司
Priority date: 2020-11-20
Filing date: 2021-06-30
Publication date: 2022-05-27
Also published as: CN114517579A

Abstract

A boom device and an operation vehicle. The boom device comprises a first boom (11) and a second boom (12); one end of the first boom (11) is hinged to one end of the second boom (12); in a folded state of the boom device, the first boom (11) and the second boom (12) are stacked in a vertical direction; one end of the first boom (11) hinged to the second boom (12) is provided with a bending boom section (111), and the bending boom section (111) bends towards a direction away from the second boom (12). The operation vehicle comprises a fixed turret (9) fixed to the rear of the cab and a rotary table (10), and the rotary table (10) is rotatably connected to the fixed turret (9); the operation vehicle further comprises the boom device. The boom device and the boom of the operation vehicle improve rigidity and torsion resistance.

Description

Boom device and work vehicle

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202011316975.7 filed on November 20, 2020 and the invention title is "Boom Device and Work Vehicle", which is incorporated herein by reference in its entirety.

technical field

The invention relates to the technical field of construction machinery, in particular to a boom device and a working vehicle.

Background technique

The concrete pump truck has a turntable and a boom device arranged on the turntable. The boom device includes a multi-section boom, and the multi-section boom can expand, fold, rotate and fold the stool through the drive of the driving device. A conveying pipe is fixed on the boom device, and the conveying pipe moves together with the boom device, which can convey the concrete to the designated position. When the concrete pump truck is in a non-working state, the multi-section boom is folded to minimize the space occupied by the concrete pump truck.

When the boom device is in the folded state, because it is constrained in the height direction, the arrangement space in the vertical direction is small. Therefore, making full use of the space in the vertical direction to fold the boom device compactly is very important for increasing the total length of the boom device and improving the flexibility of the material of the boom device. At present, the folding methods of the boom device of the concrete pump truck mainly include R-shaped, Z-shaped and RZ-shaped folding modes. The R-shaped folding means that the multi-section boom is folded in one direction, such as clockwise, and unfolded in the opposite direction, such as counterclockwise, in a coiled or rolled manner. Z-folding means that the multi-section boom sections are folded or unfolded in opposite directions in sequence. RZ shape is a combination of R shape and Z shape.

In the boom device in the form of RZ folding in the prior art, the fourth boom is usually a straight boom, and the space in the height direction of the small end of the fourth boom and the large head of the fifth boom is limited, resulting in the fourth boom The section of the box at the small end and the large end of the fifth boom cannot be made high, resulting in lower rigidity and torsional resistance of the boom.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the defects of low rigidity and torsion resistance of the boom in the prior art, so as to provide a boom device and a working vehicle that can improve the rigidity and torsion resistance of the boom.

In order to solve the above technical problems, the present invention provides a boom device, comprising a first boom and a second boom, one end of the first boom is hinged with one end of the second boom, and the arm The folded state of the rack device, the first boom and the second boom are stacked up and down, wherein the end of the first boom hinged with the second boom is provided with a bending arm section, the The bending arm section is bent in a direction away from the second arm frame.

Optionally, in the folded state of the boom device, the first boom is folded below the second boom, and the bent arm section of the first boom is bent downward.

Optionally, the boom device includes a first-section boom, a second-section boom, a third-section boom, a fourth-section boom and a fifth-section boom that are hinged end to end in sequence. In the folded state, the fifth boom is located above the fourth boom, wherein the fourth boom is the first boom, and the fifth boom is the second boom a bracket, and the end of the fourth boom that is hinged with the fifth boom is bent downward away from the fifth boom;

Or, in the folded state of the boom device, the third boom is located above the fourth boom, the fourth boom is the first boom, and the third boom is the first boom. The boom is the second boom, and the end of the fourth boom that is hinged with the third boom is bent downward away from the third boom.

Optionally, the boom device includes a first boom section, a second boom section, a third boom section, and a fourth boom section that are hinged end to end. In the folded state of the boom device, the The fourth boom is located above the third boom, wherein the third boom is the first boom, the fourth boom is the second boom, and the third boom is the second boom. The section boom is bent downward away from the fourth section boom at the end hinged with the fourth section boom.

Optionally, in the folded state of the boom device, the second boom section is located below the first boom section, the third boom section is located between the first boom section and the second boom section, and the fourth boom section is located between the first boom section and the second boom section. The boom section is located above the boom section of the third section, the boom section of the fifth section is located above the boom section of the fourth section,

The head ends of the first section, the second section and the third section are folded on the first longitudinal plane, and the tail end of the third section, the fourth section and the fifth section are folded on the first section. Two longitudinal planes,

The third section of the boom is a curved boom, and the third section of the boom transitions from the first longitudinal plane to the second longitudinal plane.

Optionally, in the folded state of the boom device, the second boom is located above the first boom, the third boom is located between the first boom and the second boom, and the fourth boom is located above the first boom. The boom section is located above the boom section of the third section, the boom section of the fifth section is located above the boom section of the fourth section,

Optionally, in the folded state of the boom device, the second boom section is located above the first boom section, and the third boom section includes a front half section, a rear half section and a middle turning portion suitable for avoiding the turntable. , the first half of the third boom is located below the second boom, the fourth boom is located above the second half of the third boom,

The first half of the boom, the second boom and the third boom are folded on the first longitudinal plane, and the second half of the third boom and the fourth boom are folded on the second longitudinal plane.

The third boom is a bending boom, and the middle bending part of the third boom transitions from the first longitudinal plane to the second longitudinal plane.

Optionally, the boom device includes at least six booms, and in the folded state of the boom device, the fifth boom is located above the fourth boom, and the sixth boom is located at the fifth boom between the frame and the fourth boom;

Or, the fifth boom is located above the fourth boom, and the sixth boom is located above the fifth boom;

Wherein, the tail end of the third boom, the fourth boom, the fifth boom, and the sixth boom are folded on the second longitudinal plane.

Optionally, in the folded state of the boom device, the second boom is located above the first boom, the third boom is located above the second boom, and the fourth boom is located on the third boom. Below the boom, the fifth boom is above the fourth boom,

The head ends of the first boom, the second boom, the third boom and the fourth boom are folded on the first longitudinal plane, and the tail end of the fourth boom and the fifth boom are folded on the first longitudinal plane. Two longitudinal planes,

The fourth section of the boom is a curved boom, and the fourth section of the boom transitions from the first longitudinal plane to the second longitudinal plane.

Wherein, the tail end of the fourth boom, the fifth boom, and the sixth boom are folded on the second longitudinal plane.

Optionally, the boom device includes at least six booms, and in the folded state of the boom device, the fifth boom and the sixth boom are on the same straight line, and the fifth boom, The sixth boom is folded on the second longitudinal plane.

Optionally, the boom device includes a seven-section boom, and in the folded state of the boom device, the seventh boom is located above or below the fifth boom and the sixth boom, so The fifth boom, the sixth boom and the seventh boom are folded on the second longitudinal plane.

Optionally, the boom device includes an eight-section boom, and in the folded state of the boom device, the seventh boom and the eighth boom are on the same straight line, and the fifth boom, all The sixth boom, the seventh boom and the eighth boom are folded on the second longitudinal plane.

The present invention also provides a work vehicle, comprising a fixed turret fixed at the rear of the cab, the turntable is rotatably connected to the fixed turret, and the boom device.

Optionally, the first boom extends above the cab, and the bent arm section of the first boom is bent toward the cab.

The technical scheme of the present invention has the following advantages:

1. In the boom device provided by the present invention, a bending arm section is provided at one end of the first boom that is hinged with the second boom, and the bending arm section is bent in a direction away from the second boom, so that the first boom can be The box section of the first boom at the end hinged with the second boom is made high, so as to improve the rigidity and torsion resistance of the first boom. Bending in the direction also leaves space for the hinged end of the second boom and the first boom, which can make the section of the second boom box higher, thereby significantly improving the rigidity and torsion resistance of the second boom.

2. In the boom device provided by the present invention, in the folded state of the boom device, the first boom is folded below the second boom, and the bent arm section of the first boom is downward Bend. Since the bending arm section of the first boom is bent downward, the space under the first boom can be fully utilized, and the box section of the first boom at the end hinged with the second boom can be made higher, thereby raising the first boom. The rigidity and torsion resistance of the first boom also leave space for the hinged end of the second boom and the first boom because the bent arm section of the first boom is bent downward, so that the second boom can be The section of the box is made higher, which in turn significantly improves the rigidity and torsion resistance of the second boom.

3. The boom device provided by the present invention can make full use of the fourth boom by bending the end of the fourth boom hinged with the fifth boom to the downward direction away from the fifth boom. The space below the boom makes the box section of the fourth boom at the end hinged with the fifth boom higher, thereby improving the rigidity and torsion resistance of the fourth boom. The bending arm section is bent downward, leaving space for the hinged end of the fifth-section boom and the fourth-section boom, which can make the box section of the fifth-section boom higher, thereby making the fifth-section boom higher. The rigidity and torsion resistance are significantly improved; or by bending the end of the fourth boom that is hinged with the third boom to the downward direction away from the third boom, the fourth boom can be fully utilized The space below the boom makes the box section of the fourth boom at the end hinged with the third boom higher, thereby improving the rigidity and torsion resistance of the fourth boom. The bending arm section is bent downward, leaving space for the hinged end of the third boom and the fourth boom, so that the section of the third boom box can be made higher, thereby making the third boom Rigidity and torsional resistance are significantly improved.

4. The boom device provided by the present invention, the boom device includes a first boom, a second boom, a third boom, and a fourth boom that are hinged end to end. In the folded state, the fourth boom is located above the third boom, wherein the third boom is the first boom, and the fourth boom is the second boom The third section of the boom is bent downward away from the fourth section of the boom at the end hinged with the fourth section of the boom. By bending the end of the boom of the third section that is hinged with the boom of the fourth section to the downward direction away from the boom of the fourth section, the space below the boom of the third section can be fully utilized, so that the boom of the third section can be made to be in contact with the boom of the third section. The section of the box at the hinged end of the four-section boom is made higher, so as to improve the rigidity and torsion resistance of the third-section boom. There is space left at the hinged end of the boom and the boom of the third section, so that the section of the boom of the fourth section can be made higher, and the rigidity and torsion resistance of the boom of the fourth section can be significantly improved.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic structural diagram of a boom device provided in the prior art;

Fig. 2 is the front view shown in Fig. 1;

3 is a schematic diagram of a fourth boom providing a boom device in Embodiment 1 of the present invention;

4 is a schematic diagram of the boom device provided in Embodiment 1 of the present invention;

5 is a schematic structural diagram of two booms in one embodiment of the boom device provided in Embodiment 1 of the present invention;

6 is a schematic structural diagram of two booms in another embodiment of the boom device provided in Embodiment 1 of the present invention;

7 is a schematic diagram of the boom device provided in Embodiment 1 of the present invention in one embodiment;

8 is a schematic diagram of the boom device provided in Embodiment 1 of the present invention in another embodiment;

9 is a schematic diagram of the boom device provided in Embodiment 1 of the present invention in another embodiment;

10 is a schematic diagram of the boom device provided in Example 2 of the present invention in one embodiment;

11 is a schematic diagram of the boom device provided in Embodiment 2 of the present invention in another embodiment;

12 is a schematic diagram of the boom device provided in Embodiment 2 of the present invention in another embodiment;

13 is a schematic diagram of the boom device provided in Example 3 of the present invention in one embodiment;

14 is a schematic diagram of the boom device provided in Embodiment 3 of the present invention in another embodiment;

15 is a schematic diagram of the boom device provided in Example 5 of the present invention in one embodiment;

16 is a schematic diagram of the boom device provided in Embodiment 5 of the present invention in another embodiment;

17 is a schematic diagram of the boom device provided in Example 5 of the present invention in one embodiment;

18 is a schematic diagram of the boom device provided in Example 5 of the present invention in one embodiment;

19 is a schematic diagram of the boom device provided in Example 5 of the present invention in one embodiment;

20 is a schematic diagram of the boom device provided in Example 5 of the present invention in one embodiment;

21 is a schematic diagram of the boom device provided in Example 5 of the present invention in one embodiment;

22 is a schematic structural diagram of the work vehicle provided in Embodiment 6 of the present invention;

23 is a rear view of the first four boom sections of the boom device provided in Embodiment 2 of the present invention;

24 is a front view of the first four boom sections of the boom device provided in Embodiment 2 of the present invention;

25 is a top view of the first four boom sections of the boom device provided in Embodiment 2 of the present invention.

Description of reference numbers:

1- the first boom; 2- the second boom; 3- the third boom; 4- the fourth boom; 5- the fifth boom; 6- the sixth boom; 7- The seventh boom; 8-the eighth boom; 9-fixed turret; 10-turntable; 11-first boom; 111-bending boom; 12-second boom.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

For the boom device in the form of RZ folding in the prior art, the fourth boom is usually a straight boom, and the space in the height direction of the small end of the fourth boom and the large head of the fifth boom is limited, resulting in the first boom. The section of the box at the small end of the four-section boom and the large end of the fifth-section boom cannot be made high, resulting in lower rigidity and torsional resistance of the boom. As shown in Figures 1 and 2, since the top plate of the fifth section of the boom cannot exceed the top of the first section of the boom, the section of the box between the small end of the fourth section and the fifth section of the boom is at the same height. The orientation is limited to the dimension L1.

To this end, this embodiment provides a boom device. In one embodiment, as shown in FIGS. 5 and 6 , the boom device includes a first boom 11 and a second boom 12 , one end of the first boom 11 and one end of the second boom 12 Hinged, in the folded state of the boom device, the first boom 11 and the second boom 12 are stacked up and down, wherein the first boom 11 is hinged with the second boom 12 One end is provided with a bending arm section 111 , and the bending arm section 111 is bent in a direction away from the second arm frame 12 .

In the boom device provided in this embodiment, a bending arm section 111 is provided at the end of the first boom 11 that is hinged with the second boom 12 , and the bending arm section 111 is bent in a direction away from the second boom 12 . , can make the box section of the first boom 11 at one end hinged with the second boom 12 higher, thereby improving the rigidity and torsion resistance of the first boom 11, and at the same time due to the bending arm of the first boom 11 The section 111 is bent in a direction away from the second boom 12, and also leaves a space for the hinged end of the second boom 12 and the first boom 11, so that the box section of the second boom 12 can be made higher, thereby making the first boom 12 higher. The rigidity and torsion resistance of the two-arm frame 12 are significantly improved.

On the basis of the above-mentioned embodiment, in a preferred embodiment, in the folded state of the boom device, the first boom 11 is folded under the second boom 12, and the first boom 11 is folded under the second boom 12. The bending arm section 111 of the frame 11 is bent downward. Since the bending arm section 111 of the first boom 11 is bent downward, the space below the first boom 11 can be fully utilized, so that the first boom 11 can be formed at the box section at the end hinged with the second boom 12 . high, so as to improve the rigidity and torsion resistance of the first boom 11, and at the same time, because the bent arm section 111 of the first boom 11 is bent downward, it also gives the second boom 12 an end that is hinged with the first boom 11. By leaving space, the cross section of the second arm frame 12 can be made higher, thereby significantly improving the rigidity and torsion resistance of the second arm frame 12 . In an alternative embodiment, in the folded state of the boom device, the first boom 11 is folded above the second boom 12, and the bending arm section 111 of the first boom 11 is bent upward.

On the basis of the above embodiment, in a preferred embodiment, the boom device includes a first boom 1, a second boom 2, a third boom 3, and a fourth boom that are hinged end to end in sequence For the boom 4 and the fifth boom 5, in the folded state of the boom device, the fifth boom 5 is located above the fourth boom 4, wherein the fourth boom 4 is The first boom 11 and the fifth boom 5 are the second boom 12 , and the fourth boom 4 faces away from the The lower part of the fifth boom 5 is bent. In this embodiment, the end of the fourth boom 4 hinged with the fifth boom 5 is bent downward away from the fifth boom 5 , so that the lower part of the fourth boom 4 can be fully utilized. space, so that the box section of the fourth section boom 4 at the end hinged with the fifth section boom 5 is made higher, so as to improve the rigidity and torsion resistance of the fourth section boom 4. The bending arm section 111 of the second section is bent downward, and also leaves space for the hinged end of the fifth section boom 5 and the fourth section boom 4, so that the box section of the fifth section boom 5 can be made higher, thereby making the fifth section boom 5 higher. The rigidity and torsion resistance of the five-section boom 5 are significantly improved. 3 and 4 , the bending arm section 111 of the fourth section of the boom 4 is bent downward at a height of L, the rear end of the fourth section of the boom 4 and the head end of the fifth section of the boom 5 are boxed The height of the body section is L2=L1+L.

On the basis of the above-mentioned embodiment, in a preferred embodiment, in the folded state of the boom device, the first boom 1 to the fourth boom 4 are folded into an RZ type. Specifically, as shown in FIG. 7 , the cab is arranged in front of the vehicle body, the fixed turret 9 is arranged behind the cab, the turntable 10 is rotatably arranged on the fixed turret 9, and the head end of the first boom 1 Hinged with the turntable 10, the first boom 1 extends toward the rear end of the vehicle body, the second boom 2 is located below the first boom 1, and the third boom 3 is located between the first boom 1 and the third boom. Between the two boom sections 2 , the fourth boom section 4 is located above the third boom section 3 , and the fifth boom section 5 is located above the fourth boom section 4 . The head end of the first section of boom 1, the second section of boom 2 and the third section of boom 3 are folded on the first longitudinal plane, the tail end of the third section of boom 3, the fourth section of boom 4 and the fifth section The boom 5 is folded on the second longitudinal plane, the third boom 3 is a curved boom, and the third boom 3 transitions from the first longitudinal plane to the second longitudinal plane.

On the basis of the above embodiment, in one embodiment, the boom device includes at least six boom sections, and the fourth boom section 4 to the sixth boom section 6 are folded into an R shape. As shown in FIG. 8 , the boom device includes six booms. In the folded state of the boom device, the fifth boom 5 is located above the fourth boom 4 , and the sixth boom 6 is located at the fifth boom. Between the boom section 5 and the boom section 4 , the tail end of the boom section 3 , the boom section 4 , the boom section 5 , and the boom section 6 are folded on the second section. In the longitudinal plane, the head ends of the first boom 1, the second boom 2 and the third boom 3 are folded on the first longitudinal plane.

In an alternative embodiment, the boom device includes at least six boom sections, and the fourth boom section 4 to the sixth boom section 6 are folded into a Z shape. As shown in FIG. 9 , the boom device includes six booms. In the folded state of the boom device, the fifth boom 5 is located above the fourth boom 4 , and the sixth boom 6 is located at the fifth boom. above the boom 5. The tail end of the third boom 3, the fourth boom 4, the fifth boom 5, and the sixth boom 6 are folded on the second longitudinal plane, and the first boom 1 and the second boom are folded on the second longitudinal plane. The head ends of the frame 2 and the third boom frame 3 are folded on the first longitudinal plane.

Example 2

The difference between this embodiment and the first embodiment is that in the folded state of the boom device, the first boom 1 to the fourth boom 4 are folded into an R shape. As shown in Figures 10 to 12, the second boom 2 is located above the first boom 1, the third boom 3 is located between the first boom 1 and the second boom 2, and the fourth boom 3 is located between the first boom 1 and the second boom 2. The boom section 4 is located above the boom section 3 , the head ends of the boom section 1 , the boom section 2 and the boom section 3 are folded on the first longitudinal plane, and the boom section 3 is folded on the first longitudinal plane. The tail end, the fourth section boom 4 is folded on the second longitudinal plane, the third section boom 3 is a turning boom, and the third section boom 3 transitions from the first longitudinal plane to the second longitudinal plane, wherein the third section The boom 3 turns at its leading or trailing end.

In one embodiment, as shown in FIGS. 23 to 25 , in the folded state of the boom device, the second boom 2 is located above the first boom 1 , and the third boom 3 includes the front half , the second half section and the middle turning part suitable for avoiding the turntable, the first half section of the third section boom 3 is located below the second section boom 2, and the fourth section boom 4 is located at the third section of the boom 3 The rear half Above the section, the first half of the boom 1, the second boom 2 and the third boom 3 are folded on the first longitudinal plane, the second half of the third boom 3 and the fourth boom 4. Folded on the second longitudinal plane, the third boom 3 is a curved boom, and the middle corner of the third boom 3 transitions from the first longitudinal plane to the second longitudinal plane.

In one embodiment, as shown in FIG. 10 , the cab is arranged in front of the vehicle body, the fixed turret 9 is arranged behind the cab and in the middle of the vehicle body, and the turret 10 is rotatably arranged on the fixed turret 9, The head end of the first section of boom 1 is hinged with the turntable 10, the first section of boom 1 extends toward the rear end of the vehicle body, the second section of boom 2 is located above the first section of boom 1, and the third section of boom 3 It is located between the first boom 1 and the second boom 2 , the fourth boom 4 is located above the third boom 3 , and the fifth boom 5 is located above the fourth boom 4 . The head end of the first section of boom 1, the second section of boom 2 and the third section of boom 3 are folded on the first longitudinal plane, the tail end of the third section of boom 3, the fourth section of boom 4 and the fifth section The boom 5 is folded on the second longitudinal plane, the third boom 3 is a curved boom, and the third boom 3 transitions from the first longitudinal plane to the second longitudinal plane.

On the basis of the above embodiment, in one embodiment, as shown in FIG. 11 , the boom device includes six booms, and in the folded state of the boom device, the fourth boom 4 to the sixth boom 6 Fold into Z shape. Specifically, the fifth boom 5 is located above the fourth boom 4 , and the sixth boom 6 is located above the fifth boom 5 . The tail end of the third boom 3, the fourth boom 4, the fifth boom 5, and the sixth boom 6 are folded on the second longitudinal plane, and the first boom 1 and the second boom are folded on the second longitudinal plane. The head ends of the frame 2 and the third boom frame 3 are folded on the first longitudinal plane.

In an alternative embodiment, as shown in FIG. 12 , the boom device includes six booms. In the folded state of the boom device, the fourth boom 4 to the sixth boom 6 are folded into an R shape. Specifically, the fifth boom 5 is located above the fourth boom 4 , and the sixth boom 6 is located between the fifth boom 5 and the fourth boom 4 . The tail end of the third boom 3, the fourth boom 4, the fifth boom 5, and the sixth boom 6 are folded on the second longitudinal plane, and the first boom 1 and the second boom are folded on the second longitudinal plane. The head ends of the frame 2 and the third boom frame 3 are folded on the first longitudinal plane.

Example 3

The difference between this embodiment and Embodiment 1 is that, as shown in FIGS. 13 and 14 , in one embodiment, the boom device includes a first boom 1 , a second boom 2 , and a third boom that are hinged end to end in sequence. The boom 3, the fourth boom 4 and the fifth boom 5, in the folded state of the boom device, the third boom 3 is located above the fourth boom 4, so The fourth boom 4 is the first boom 11 , the third boom 3 is the second boom 12 , and the fourth boom 4 is connected to the third boom The hinged end of 3 is bent downward away from the third boom 3 . By bending the end of the fourth section boom 4 hinged with the third section boom 3 to the downward direction away from the third section boom 3, the space below the fourth section boom 4 can be fully utilized, so that the The box section of the fourth section boom 4 at the end hinged with the third section boom 3 is made high, so as to improve the rigidity and torsion resistance of the fourth section boom 4. At the same time, due to the bending of the fourth section boom 4 The boom section 111 is bent downwards, which also leaves space for the hinged end of the third boom 3 and the fourth boom 4, so that the box section of the third boom 3 can be made higher, thereby making the third boom 3 higher. The rigidity and torsion resistance of the frame 3 are significantly improved.

On the basis of the above-mentioned embodiment, in one embodiment, in the folded state of the boom device, the first boom 1 to the fourth boom 4 are folded into a ZR shape. In one embodiment, as shown in FIG. 13 , the cab is arranged in front of the vehicle body, the fixed turret 9 is arranged behind the cab and at the rear end of the vehicle body, and the turntable 10 is rotatably arranged on the fixed turret, The head end of the first section of boom 1 is hinged with the turntable 10, the first section of boom 1 extends toward the front end of the vehicle body, the second section of boom 2 is located above the first section of boom 1, and the third section of boom 3 is located at Above the second boom 2 , the fourth boom 4 is located below the third boom 3 , and the fifth boom 5 is located above the fourth boom 4 . The first section of boom 1, the second section of boom 2, the third section of boom 3 and the head end of the fourth section of boom 4 are folded on the first longitudinal plane, the tail end of the fourth section of boom 4, the fifth section of the boom The boom 5 is folded on the second longitudinal plane, the fourth boom 4 is a curved boom, and the fourth boom 4 transitions from the first longitudinal plane to the second longitudinal plane.

On the basis of the above embodiment, in one embodiment, the boom device includes six booms, and the fourth boom 4 to the sixth boom 6 are folded into an R shape. Specifically, as shown in FIG. 14 , the fifth boom 5 is located above the fourth boom 4 , and the sixth boom 6 is located between the fifth boom 5 and the fourth boom 4 . The first section of boom 1, the second section of boom 2, the third section of boom 3 and the head end of the fourth section of boom 4 are folded on the first longitudinal plane, the tail end of the fourth section of boom 4, the fifth section of the boom The boom 5 and the sixth boom 6 are folded on the second longitudinal plane.

Example 4

The difference between this embodiment and Embodiment 1 is that the boom device includes a first boom 1, a second boom 2, a third boom 3, and a fourth boom 4 that are hinged end to end in sequence. In the folded state of the boom device, the fourth boom 4 is located above the third boom 3 , wherein the third boom 3 is the first boom 11 , and the fourth boom 3 is the first boom 11 . The boom section 4 is the second boom frame 12 , and the end of the boom section 3 hinged with the boom section 4 is bent downward away from the boom section 4 . In this embodiment, the space below the third boom 3 can be fully utilized by bending the end of the third boom 3 hinged with the fourth boom 4 downwards away from the fourth boom 4 , so that the box section of the third section boom 3 at the end hinged with the fourth section boom 4 is made higher, so as to improve the rigidity and torsion resistance of the third section boom 3. At the same time, due to the The bending arm section 111 is bent downward, which also leaves space for the hinged end of the fourth boom 4 and the third boom 3, so that the box section of the fourth boom 4 can be made higher, thereby making the fourth boom 4 higher. The rigidity and torsion resistance of the boom 4 are significantly improved.

Example 5

The difference between this embodiment and the above embodiments is that the boom device in this embodiment includes at least six booms, and in the folded state of the boom device, the fifth boom 5 and the sixth boom 6 are in the same On a straight line, the fifth boom 5 and the sixth boom 6 are folded on the second longitudinal plane. In one embodiment, as shown in FIG. 15 to FIG. 21 , the fifth boom 5 and the sixth boom 6 are on the same straight line, and are located above the fourth boom 4 at the same time.

On the basis of the above embodiment, in one embodiment, the boom device includes a seven-section boom, and in the folded state of the boom device, the seventh boom 7 is located at the fifth boom 5 and the sixth boom Above or below 6, the fifth boom 5, the sixth boom 6, and the seventh boom 7 are folded on the second longitudinal plane.

As shown in Figure 15, the cab is set in front of the vehicle body, the fixed turret 9 is set at the rear of the cab, and the turret is set on the fixed turret, wherein the fixed turret is set close to the cab, and the fourth section of the boom 4 is connected to the first section of the cab. The five-section booms 5 all extend above the cab. The head ends of the first boom 1, the second boom 2, and the third boom 3 are folded on the first longitudinal plane, and the tail of the third boom 3 is folded on the first longitudinal plane. The ends, the fourth boom 4, the fifth boom 5, and the sixth boom 6 are folded on the second longitudinal plane.

On the basis of the above-mentioned embodiment, in one embodiment, the boom device includes eight booms. In the folded state of the boom device, the seventh boom 7 and the eighth boom 8 are on the same straight line, so The fifth boom 5, the sixth boom 6, the seventh boom 7 and the eighth boom 8 are folded on the second longitudinal plane. As shown in Fig. 16 and Fig. 19 , the fifth boom 5 and the sixth boom 6 are on the same straight line, the seventh boom 7 and the eighth boom 8 are on the same straight line, and the seventh boom 7 , The eighth section boom 8 is folded below the fifth section boom 5 and the sixth section boom 6, wherein the first section boom 1, the second section boom 2, and the third section boom 3 head ends Folded on the first longitudinal plane, the tail end of the third boom 3 is connected to the fourth boom 4, the fifth boom 5, the sixth boom 6, the seventh boom 7 and the third boom. The eight-section boom 8 is folded in the second longitudinal plane.

As shown in Figure 21, the fifth boom 5 and the sixth boom 6 are on the same straight line, the seventh boom 7 and the eighth boom 8 are on the same straight line, and the seventh boom 7, The eighth boom 8 is folded under the fifth boom 5 and the sixth boom 6, wherein the first boom 1, the second boom 2, the third boom 3, and the fourth boom The head end of the boom 4 is folded on the first longitudinal plane, and the tail end of the fourth boom 4 is connected to the fifth boom 5, the sixth boom 6, the seventh boom 7 and the eighth boom The boom 8 is folded in said second longitudinal plane.

In an alternative embodiment, as shown in FIGS. 17 and 18 , the fifth boom 5 and the sixth boom 6 are on the same straight line, and the seventh boom 7 and the eighth boom 8 are on the same line. On the same line, the seventh boom 7 and the eighth boom 8 are folded above the fifth boom 5 and the sixth boom 6 . Among them, the first section of the boom 1, the second section of the boom 2, and the first section of the boom 3 are folded on the first longitudinal plane, and the tail end of the third section of the boom 3 is connected to the fourth section of the boom 4 and the third section of the boom. The five-section boom 5, the sixth boom 6, the seventh boom 7 and the eighth boom 8 are folded on the second longitudinal plane.

Example 6

This embodiment provides a working vehicle, which can be a pump truck or a fire truck. As shown in FIG. 22 , it includes a fixed turret 9 fixed behind the cab, and the turret 10 is rotatably connected to the fixed turret 9 The above also includes the boom device provided in each of the above embodiments.

In one embodiment, the first boom 11 extends above the cab, and the bent arm section 111 of the first boom 11 is bent toward the cab. By bending the bending arm section 111 of the first boom 11 toward the cab, the space above the cab can be fully utilized, and the first boom 11 at the end hinged with the second boom 12 can be made as far as possible. The section of the box body is made high, so as to improve the rigidity and torsion resistance of the first boom 11. At the same time, because the bent arm section 111 of the first boom 11 is downward, the second boom 12 is also hinged with the first boom 11. There is a space at one end of the second arm frame 12, so that the cross section of the second arm frame 12 can be made higher, thereby significantly improving the rigidity and torsion resistance of the second arm frame 12.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims

A boom device, comprising a first boom (11) and a second boom (12), one end of the first boom (11) is hinged with one end of the second boom (12), In the folded state of the boom device, the first boom (11) and the second boom (12) are stacked up and down, wherein the first boom (11) is connected to the second boom (11). 12) One end of the hinge is provided with a bending arm segment (111), and the bending arm segment (111) is bent in a direction away from the second arm frame (12).
The boom device according to claim 1, wherein in the folded state of the boom device, the first boom (11) is folded under the second boom (12), and the first boom The bending arm section (111) of the frame (11) is bent downward.
The boom device according to claim 2, wherein the boom device comprises a first boom (1), a second boom (2), a third boom (3), a first boom (1), a third boom (3), Four boom sections (4) and fifth boom sections (5), in the folded state of the boom device, the fifth boom section (5) is located above the fourth boom section (4), wherein , the fourth boom (4) is the first boom (11), the fifth boom (5) is the second boom (12), and the fourth boom (12) (4) bending the end hinged with the fifth-section boom (5) to the downward direction away from the fifth-section boom (5);

Or, in the folded state of the boom device, the third boom (3) is located above the fourth boom (4), and the fourth boom (4) is the first boom (4). A boom (11), the third boom (3) is the second boom (12), and the fourth boom (4) is connected to the third boom (3) One end of the hinge is bent downward away from the third boom (3).
The boom device according to claim 2, wherein the boom device comprises a first boom (1), a second boom (2), a third boom (3), a first boom (1), a third boom (3), Four-section boom (4), in the folded state of the boom device, the fourth-section boom (4) is located above the third-section boom (3), wherein the third-section boom ( 3) is the first boom (11), the fourth boom (4) is the second boom (12), and the third boom (3) is in contact with the fourth boom. The hinged end of the frame (4) is bent downward away from the fourth boom frame (4).
The boom device according to claim 3, wherein in the folded state of the boom device, the second boom (2) is located below the first boom (1), and the third boom (3) It is located between the first boom (1) and the second boom (2), the fourth boom (4) is located above the third boom (3), and the fifth boom (5) is located at the top of the third boom (3). Above the fourth boom (4),

The head ends of the first boom (1), the second boom (2) and the third boom (3) are folded on the first longitudinal plane, and the tail end of the third boom (3), the fourth boom The section boom (4) and the fifth section boom (5) are folded on the second longitudinal plane,

The third boom (3) is a bending boom, and the third boom (3) transitions from the first longitudinal plane to the second longitudinal plane.
The boom device according to claim 3, wherein in the folded state of the boom device, the second boom (2) is located above the first boom (1), and the third boom (3) It is located between the first boom (1) and the second boom (2), the fourth boom (4) is located above the third boom (3), and the fifth boom (5) is located at the top of the third boom (3). Above the fourth boom (4),

The head ends of the first boom (1), the second boom (2) and the third boom (3) are folded on the first longitudinal plane, and the tail end of the third boom (3), the fourth boom The section boom (4) and the fifth section boom (5) are folded on the second longitudinal plane,

The third boom (3) is a bending boom, and the third boom (3) transitions from the first longitudinal plane to the second longitudinal plane.
The boom device according to claim 4, wherein in the folded state of the boom device, the second boom (2) is located above the first boom (1), and the third boom (3) It includes a first half section, a second half section and a middle turning portion suitable for avoiding the turntable, the first half section of the third section boom (3) is located below the second section boom (2), and the fourth section boom (4) is located at Above the second half of the third boom (3),

The first half of the boom (1), the second boom (2) and the third boom (3) are folded on the first longitudinal plane, the second half of the third boom (3), the third The four-section boom (4) is folded in the second longitudinal plane,

The third boom (3) is a bending boom, and the middle bending portion of the third boom (3) transitions from the first longitudinal plane to the second longitudinal plane.
The boom device according to any one of claims 5-7, wherein the boom device comprises at least six booms, and in the folded state of the boom device, the fifth boom (5) is located at the Above the four-section boom (4), the sixth-section boom (6) is located between the fifth-section boom (5) and the fourth-section boom (4);

Or, the fifth boom (5) is located above the fourth boom (4), and the sixth boom (6) is located above the fifth boom (5);

Wherein, the tail end of the third boom (3), the fourth boom (4), the fifth boom (5), and the sixth boom (6) are folded on the second longitudinal plane.
The boom device according to claim 3, wherein in the folded state of the boom device, the second boom (2) is located above the first boom (1), and the third boom (3) It is located above the second boom (2), the fourth boom (4) is located below the third boom (3), and the fifth boom (5) is located at the bottom of the fourth boom (4). above,

The head ends of the first boom (1), the second boom (2), the third boom (3) and the fourth boom (4) are folded on the first longitudinal plane, and the fourth boom The tail end of (4), the fifth boom (5) is folded on the second longitudinal plane,

The fourth section of the boom (4) is a bending boom, and the fourth section of the boom (4) transitions from the first longitudinal plane to the second longitudinal plane.
The boom device according to claim 9, wherein the boom device comprises at least six booms, and in the folded state of the boom device, the fifth boom (5) is located at the fourth boom (4) ), the sixth boom (6) is located between the fifth boom (5) and the fourth boom (4);

Or, the fifth boom (5) is located above the fourth boom (4), and the sixth boom (6) is located above the fifth boom (5);

Wherein, the tail end of the fourth boom (4), the fifth boom (5), and the sixth boom (6) are folded on the second longitudinal plane.
The boom device according to any one of claims 5, 6, and 9, wherein the boom device comprises at least six booms, and in the folded state of the boom device, the fifth boom (5) On the same line as the sixth section boom (6), the fifth section boom (5) and the sixth section boom (6) are folded on the second longitudinal plane.
The boom device according to claim 11, wherein the boom device comprises a seven-section boom, and in the folded state of the boom device, the seventh boom (7) is located at the fifth boom ( 5) Above or below the sixth section boom (6), the fifth section boom (5), the sixth section boom (6), and the seventh section boom (7) are folded on the second longitudinal plane.
The boom device according to claim 12, wherein the boom device comprises an eight-section boom, and in the folded state of the boom device, a seventh boom (7) and an eighth boom (8) On the same line, the fifth boom (5), the sixth boom (6), the seventh boom (7) and the eighth boom (8) are folded on the the second longitudinal plane.
A work vehicle, comprising a fixed turret (9) fixed behind a driver's cab, a turntable (10) is rotatably connected to the fixed turret (9), and further comprising any of claims 1-13. described boom device.
The work vehicle according to claim 14, wherein the first boom (11) extends above the cab, and the bent arm section (111) of the first boom (11) faces the cab Bend.