CN114737763B - Arm support system, control method and engineering machinery - Google Patents
Arm support system, control method and engineering machinery Download PDFInfo
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- CN114737763B CN114737763B CN202210254351.XA CN202210254351A CN114737763B CN 114737763 B CN114737763 B CN 114737763B CN 202210254351 A CN202210254351 A CN 202210254351A CN 114737763 B CN114737763 B CN 114737763B
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000004744 fabric Substances 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 8
- 230000001960 triggered effect Effects 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
- E04G21/0463—Devices for both conveying and distributing with distribution hose with booms with boom control mechanisms, e.g. to automate concrete distribution
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention provides a boom system, a control method and engineering machinery, wherein the boom system comprises the following components: a boom including a hinged end portion; the turntable comprises a front hinge part and a rear hinge part which are positioned at two sides of the rotation center; the two ends of the lifting connecting rod are respectively hinged to the rear hinge part and the hinge end part; the rotary driving piece is used for driving the arm support to perform amplitude-variable pivoting around the hinged end part; and the lifting driving piece is hinged to the front hinge part and used for driving the lifting connecting rod to rotate around the rear hinge part so as to drive the hinge end part to lift and lower between the front hinge part and the rear hinge part. The boom system can ensure the unchanged quality and effectively increase the distribution height of the boom through the cooperation among the lifting driving piece, the lifting connecting rod and the rotary driving piece, is beneficial to the light weight of the structure and the improvement of the competitiveness of products, and can also reduce the maximum tipping moment as much as possible.
Description
Technical Field
The invention belongs to the technical field of engineering machinery, and particularly relates to an arm support system, a control method and engineering machinery.
Background
The tipping moment of the cantilever crane of the pump truck to the rotation center is an important factor limiting the distribution range of the pump truck, and the tipping moment is larger, so that the stability of the whole pump truck is reduced, the pump truck is tipped, equipment is damaged when the pump truck is light, and casualties are generated when the pump truck is heavy. The distribution height of the pump truck is the most important index for measuring the distribution range of the pump truck, and increasing the distribution height of the pump truck under the condition of not increasing the tipping moment is a popular research subject of a main engine plant of each large pump truck. As shown in fig. 1 and 2, the concrete pump at present mainly consists of a turntable and a boom, all the components are connected through hinge point pin shafts, the length of the boom is L, the vertical height of the boom and the turntable connecting pin shaft from the ground is H, the horizontal distance from the rotation center is R, the gravity center of a full-load boom is far from the boom and the turntable connecting pin shaft X, and the weight of the full-load boom system is G. The maximum working height is: h+l, radius of cloth range L-R1, maximum tilting moment m=g (X-R);
after the length of the arm support and the heights of the lower carriage and the chassis are determined, the distribution height and the distribution range of the pump truck are determined as the hinge point of the turntable structure is fixed. But be limited by whole car height regulation, the height of getting off and chassis is confirmed, so the increase of cloth height only can rely on the length of increase cantilever crane to realize, under the condition that the structure lightweight can't satisfy, will increase cantilever crane system's weight, and then lead to the biggest moment of overturning of whole car to increase, is unfavorable for the stable security of whole car.
Disclosure of Invention
The invention mainly aims to provide an arm support system, a control method and engineering machinery, and aims to solve the technical problems that in the prior art, a tipping bending moment is large and the distribution height is not adjustable.
In order to achieve the above object, the present invention provides a boom system, wherein the boom system includes: a boom including a hinged end portion; the turntable comprises a front hinge part and a rear hinge part which are positioned at two sides of the rotation center; the two ends of the lifting connecting rod are respectively hinged to the rear hinge part and the hinge end part; the rotary driving piece is used for driving the arm support to perform amplitude-variable pivoting around the hinged end part; and the lifting driving piece is hinged to the front hinge part and used for driving the lifting connecting rod to rotate around the rear hinge part so as to drive the hinge end part to lift and lower between the front hinge part and the rear hinge part.
In an embodiment of the invention, the lifting drive is hinged to the hinged end portion by a first hinge portion of the lifting link.
In an embodiment of the invention, the rotation driving member is hinged to a second hinge part of the lifting link, the lifting link is hinged to the rear hinge part through a third hinge part, and the first hinge part, the second hinge part and the third hinge part are not collinear.
In the embodiment of the invention, the lifting connecting rod is arranged in the shell of the arm support.
In an embodiment of the invention, the lifting driving member is hinged to a fourth hinge portion of the lifting link, the rotation driving member is hinged to the turntable through a fifth hinge portion of the lifting link, and the fourth hinge portion, the fifth hinge portion and the hinge end portion are not collinear.
In the embodiment of the invention, the lifting driving piece is arranged in the shell of the turntable, and the lifting connecting rod is arranged outside the arm support.
In an embodiment of the present invention, the front hinge portion and the rear hinge portion are respectively provided at front and rear end portions of the turntable.
In an embodiment of the invention, the rear hinge is higher than the front hinge.
The invention also provides a boom control method which is applied to the boom system and comprises the step of adjusting and controlling the working state of the lifting driving piece according to the expected distribution height of the boom.
In an embodiment of the present invention, the controlling the working state of the lifting driving member according to the expected cloth height adjustment of the arm support includes:
judging that the expected cloth height is not larger than the current cloth height of the arm support;
maintaining the lift drive in a restrained state;
controlling the rotary driving piece to drive the arm support to be unfolded to a specified pitching angle;
judging that the expected cloth height is larger than the current cloth height of the arm support;
and triggering the rotation driving piece and the lifting driving piece at the same time.
The invention also provides engineering machinery, which comprises a vehicle body and the arm support system, wherein the turntable is arranged close to the vehicle head of the vehicle body, and the arm support extends to the rear side of the vehicle head under the condition that the arm support is positioned at a horizontal position.
Through the technical scheme, the boom system provided by the embodiment of the invention has the following beneficial effects:
when the boom system in the embodiment is adopted for carrying out the material distribution operation, whether the material distribution height of the boom is required to be improved can be judged, if the material distribution height of the boom is not required to be improved, the rotary driving piece can be triggered, the rotary driving piece drives the boom to rotate around the hinged end part between the horizontal position and the vertical position, and the unfolding angle of the boom is controlled; if the material distribution height of the arm support needs to be improved, the rotary driving piece and the lifting driving piece are triggered simultaneously, the lifting connecting rod is driven to rotate around the rotating table, the hinged end part is driven to ascend from the front hinged part to the rear hinged part, the effective material distribution height of the arm support is improved, the competitiveness of a product is improved, when the arm support is in a horizontal working condition, the hinged end part can descend from the rear hinged part to the front hinged part under the condition that the length of the arm support is unchanged, the horizontal distance between the arm support and the rotation center is enabled to be maximum, the tipping bending moment of the arm support under the horizontal working condition is enabled to be minimum, namely the maximum tipping bending moment is minimum, and the working reliability under the working condition is guaranteed. The boom system can ensure the unchanged quality and effectively increase the distribution height of the boom through the cooperation among the lifting driving piece, the lifting connecting rod and the rotary driving piece, is beneficial to the light weight of the structure and the improvement of the competitiveness of products, and can also reduce the maximum tipping moment as much as possible.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide an understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 is a schematic diagram of a working condition structure of a vertical boom of an engineering machine in the prior art;
FIG. 2 is a schematic diagram of a working condition structure of a horizontal boom of an engineering machine in the prior art;
FIG. 3 is a schematic diagram of a boom system according to an embodiment of the present invention in a horizontal condition;
FIG. 4 is a schematic diagram of a boom system in a vertical condition according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a variation of boom system according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a boom system according to another embodiment of the present invention in a horizontal condition;
FIG. 7 is a schematic view of a boom system according to another embodiment of the present invention in a vertical condition;
FIG. 8 is a schematic diagram of a boom system operating condition change according to another embodiment of the present invention.
Description of the reference numerals
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention.
The boom system according to the invention is described below with reference to the accompanying drawings.
As shown in fig. 3 to 5, in an embodiment of the present invention, a boom system 100 is provided, wherein the boom system 100 comprises a boom 1 and a lifting drive member 5, the boom 1 comprising a hinged end portion 11; the turntable 2 includes a front hinge part 21 and a rear hinge part 22 at both sides of the center of rotation; the two ends of the lifting connecting rod 4 are respectively hinged with the rear hinge part 22 and the hinge end part 11; the rotary driving piece 3 is used for driving the arm support 1 to perform amplitude-variable pivoting around the hinged end 11; the elevation driving member 5 is hinged to the front hinge portion 21 and serves to drive the elevation link 4 to rotate about the rear hinge portion 22 to drive the hinge end 11 to rise and fall between the front hinge portion 21 and the rear hinge portion 22. The turntable 2 in the embodiment is located below the boom 1, and the boom system 100 is mainly applied to engineering machinery such as engineering cranes, boom fire trucks, boom type climbing trucks, concrete pump trucks and the like.
When the boom system 100 in this embodiment is used for carrying out the material distribution operation, it may be firstly determined whether the material distribution height of the boom 1 needs to be increased, if the material distribution height of the boom 1 does not need to be increased, the rotation driving member 3 may be triggered to drive the boom 1 to rotate between the horizontal position and the vertical position around the hinged end 11 by the rotation driving member 3, the unfolding angle of the boom 1 is controlled, if the material distribution height of the boom 1 needs to be increased, the rotation driving member 3 and the lifting driving member 5 are triggered at the same time, the lifting driving member 5 drives the lifting connecting rod 4 to rotate around the turntable 2, and drives the hinged end 11 to rise from the front hinge 21 to the rear hinge 22, so as to promote the effective material distribution height of the boom 1 and promote the competitiveness of the product; when the boom 1 is in a horizontal working condition, the rear hinge part 22 of the hinge end part 11 can be lowered towards the front hinge part 21 under the condition that the length of the boom 1 is kept unchanged, so that the horizontal distance R of the boom 1 from the rotation center is maximum, the tipping bending moment M of the boom 1 under the horizontal working condition is minimum, namely the maximum tipping bending moment is minimum, and the working reliability under the horizontal working condition is ensured. The boom system 100 in this embodiment can effectively increase the material distribution height of the boom 1 while ensuring the unchanged quality through the cooperation among the lifting driving piece 5, the lifting connecting rod 4 and the rotation driving piece 3, is beneficial to the light weight of the structure and the improvement of the product competitiveness, and can also reduce the maximum tipping bending moment as much as possible.
Specifically, as shown in fig. 3 and fig. 6, the boom 1 is in a horizontal working condition, and when the length L of the boom 1 is kept unchanged, the length R is the largest at this time, so as to ensure the working reliability under the working condition; as shown in fig. 4 and 7, the vertical working condition of the boom 1 is shown, and the hinge end 11 is lifted under the condition of keeping the length L of the boom 1 unchanged, that is, the effective material distribution height of the boom 1 is improved under the condition of keeping the sizes of the boom 1 and the turntable 2 unchanged, so that the competitiveness of products is improved.
In the embodiment of the invention, the rotary driving member 3 and the lifting driving member 5 are oil cylinders. The arm support 1 and the lifting connecting rod 4 can be driven through the extension and retraction of the oil cylinder, the structure is convenient to install, the hinge point travel can be increased through selecting the rotary driving piece 3 and the lifting driving piece 5 with different travel, and when the travel is overlarge, the multi-stage oil cylinder can be selected.
Specifically, in one embodiment, the upper end of the elevation driving member 5 is hinged to the hinge end portion 11 through the first hinge portion 41 of the elevation link 4, and the lower end is hinged to the front hinge portion 21. In this embodiment, the lifting driving member 5 is driven by directly acting the lifting driving member 5 on the hinged end portion 11, so that the lifting connecting rod 4 can be unfolded to a maximum height in a vertical state with a horizontal line, the material distribution height of the arm support 1 can be improved to the maximum extent, and the product competitiveness is improved.
In the embodiment of the present invention, the lower end of the rotation driving member 3 is hinged to the second hinge portion 42 of the lifting link 4, the upper end is hinged to the driving installation portion 12 of the boom 1, the lower end of the lifting link 4 is hinged to the rear hinge portion 22 via the third hinge portion 43, the upper end is hinged to the hinge end portion 11, and the first hinge portion 41, the second hinge portion 42 and the third hinge portion 43 are not collinear. As shown in fig. 3 to 5, the first hinge part 41, the second hinge part 42, and the third hinge part 43 form a triangular support linkage structure in the present embodiment, which improves structural strength while improving convenience in structural installation and control. In this embodiment, in order to avoid interference between the lifting link 4 and the turntable 2 and between the boom 1, the lifting link 4 is built into the housing of the boom 1.
In another embodiment, as shown in fig. 6 to 8, in the embodiment of the present invention, the upper end of the elevation driving member 5 is hinged to the fourth hinge portion 44 of the elevation link 4, the lower end is hinged to the front hinge portion 21, the lower end of the rotation driving member 3 is hinged to the turntable 2 through the fifth hinge portion 45 of the elevation link 4, the upper end is hinged to the driving mounting portion 12, and the fourth hinge portion 44, the fifth hinge portion 45, and the hinge end portion 11 are not collinear. In this embodiment, compared with the second triangle connection structure in which the rotation driving member 3 directly acts on the hinge end 11, the lifting driving member 5 in this embodiment acts on the hinge end 11 through the lifting link 4, and the lifting link 4 and the rotation driving member 3 are hinged to the same hinge point on the turntable 2, the boom system 100 in this embodiment has a simple structure, and can facilitate installation of the rotation driving member 3. In order to prevent interference between the components, the cylinder of the lifting driving member 5 in this embodiment is internally arranged in the housing of the turntable 2, and the lifting connecting rod 4 is externally arranged on the arm support 1.
As shown in fig. 5 and 8, in the two state diagrams of the lifting link 4, L0 is the distance between the hinged end 11 and the turntable 2 under the vertical working condition, when the boom 1 is in the horizontal working condition, the included angle between the lifting link 4 and the horizontal line is a 1, and at this time, the height of the hinged end 11 relative to the third hinge 43 is h1=l0×sin a 1; when the arm support 1 is in the vertical working condition, the included angle between the lifting connecting rod 4 and the horizontal line is alpha 2, at this time, the height of the hinged end 11 relative to the third hinged part 43 is h2=l0×sin alpha 2, and the difference between the two working conditions is H' =h2-H1. Specifically, the angles alpha 1, alpha 2 and L0 can be changed by reasonably designing the stroke of the lifting driving piece 5 and the structural shape of the lifting connecting rod 4, so that different cloth heights can be realized.
In an embodiment, the front hinge 21 and the rear hinge 22 are provided at the front and rear end portions of the turntable 2, respectively. In this embodiment, the lifting driving member 5 and the lifting link 4 are respectively mounted at the front and rear ends of the turntable 2, so that the compactness of the boom system 100 can be optimized, and the mounting space and the movement stroke space can be fully utilized.
In the present embodiment, the rear hinge 22 is higher than the front hinge 21. In this embodiment, the height of the boom 1 in the vertical working condition can be increased by the higher rear hinge portion 22, and the lower front hinge portion 21 can be matched with the boom 1 to provide a receiving space for the lifting driving member 5.
The invention also provides a boom control method, which is applied to the boom system 100, and comprises the steps of adjusting and controlling the working state of the lifting driving piece 5 according to the expected distribution height of the boom 1.
In one embodiment, controlling the operating state of the lifting drive 5 according to the desired cloth height adjustment of the boom 1 comprises:
judging that the expected cloth height is not larger than the current cloth height of the arm support 1;
maintaining the elevation drive 5 in a suppressed state;
controlling the rotary driving piece 3 to drive the arm support 1 to be unfolded to a specified pitching angle;
judging that the expected cloth height is larger than the current cloth height of the arm support 1;
at the same time, the rotation driving piece 3 and the lifting driving piece 5 are triggered, so that the hinged end 11 rises from the front hinged part 21 to the rear hinged part 22, and the unfolding angle of the arm support 1 is kept unchanged.
Before the ECU of the whole vehicle control system controls the arm support 1 to act, firstly judging whether the arm support 1 needs to improve the material distribution height. If the ECU receives the instruction that the boom 1 is not required to increase the material distribution height, at the moment, only the rotary driving piece 3 is triggered, the lifting driving piece 5 is in a restrained state, at the moment, the height position of the hinged end 11 of the boom 1 is unchanged, and the unfolding angle of the boom 1 is controlled only through the action of the rotary driving piece 3, so that different working condition requirements are realized; if the ECU receives the instruction that the arm support 1 needs to improve the material distribution height, the rotation driving piece 3 and the lifting driving piece 5 are triggered at the same time, the lifting driving piece 5 is controlled to act, different material distribution height requirements can be met, the rotation driving piece 3 is controlled to drive through coordinated action, and the unfolding angle of the arm support 1 is ensured to be unchanged.
The invention also provides the engineering machine 200, the engineering machine 200 comprises a vehicle body 210 and the arm support system 100, the turntable 2 is arranged close to the vehicle head 220 of the vehicle body 210, and the arm support 1 extends to the rear side of the vehicle head 220 when being positioned in a horizontal position. In this embodiment, the turntable 2 is disposed near the headstock 220, and the boom 1 extends backward, so that the center of gravity of the boom 1 is disposed near the center of gravity of the vehicle body 210, so as to avoid the tipping of the engineering machinery 200, and the boom system 100 in this embodiment refers to the above embodiment.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. Boom system, characterized in that the boom system (100) comprises:
arm support (1) comprising a hinged end (11);
a turntable (2) comprising a front hinge part (21) and a rear hinge part (22) located on both sides of the center of rotation;
a lifting connecting rod (4) with two ends respectively hinged to the rear hinge part (22) and the hinge end part (11);
the rotary driving piece (3) is used for driving the arm support (1) to perform amplitude-variable pivoting around the hinged end (11);
the lifting driving piece (5) is hinged to the front hinging part (21) and drives the lifting connecting rod (4) to rotate around the rear hinging part (22) through self telescopic movement so as to drive the hinging end part (11) to lift between the front hinging part (21) and the rear hinging part (22);
the lifting driving piece (5) is hinged to the hinged end part (11) through a first hinge part (41) of the lifting connecting rod (4), and the lifting driving piece (5) directly acts on the hinged end part (11) to drive the lifting connecting rod (4) so that the lifting connecting rod (4) is unfolded to the maximum height in a vertical state with a horizontal line;
one end of the rotary driving piece (3) is hinged to a second hinging part (42) of the lifting connecting rod (4), the other end of the rotary driving piece is hinged to a driving installation part (12) of the arm support (1), the lifting connecting rod (4) is hinged to the rear hinging part (22) through a third hinging part (43), and the first hinging part (41), the second hinging part (42) and the third hinging part (43) are not collinear.
2. Boom system according to claim 1, characterized in that the lifting link (4) is built into the housing of the boom (1).
3. Boom system according to claim 1 or 2, characterized in that the front hinge (21) and the rear hinge (22) are provided at the front and rear end of the turntable (2), respectively.
4. A boom system according to claim 3, characterized in that the rear hinge (22) is higher than the front hinge (21).
5. Boom system, characterized in that the boom system (100) comprises:
arm support (1) comprising a hinged end (11);
a turntable (2) comprising a front hinge part (21) and a rear hinge part (22) located on both sides of the center of rotation;
a lifting connecting rod (4) with two ends respectively hinged to the rear hinge part (22) and the hinge end part (11);
the rotary driving piece (3) is used for driving the arm support (1) to perform amplitude-variable pivoting around the hinged end (11);
the lifting driving piece (5) is hinged to the front hinging part (21) and drives the lifting connecting rod (4) to rotate around the rear hinging part (22) through self telescopic movement so as to drive the hinging end part (11) to lift between the front hinging part (21) and the rear hinging part (22);
the lifting driving piece (5) is hinged to a fourth hinging part (44) of the lifting connecting rod (4), one end of the rotary driving piece (3) is hinged to the rotary table (2) through a fifth hinging part (45) of the lifting connecting rod (4), the other end of the rotary driving piece is hinged to a driving installation part (12) of the arm support (1), and the fourth hinging part (44), the fifth hinging part (45) and the hinging end part (11) are not collinear and form a triangular connecting structure.
6. Boom system according to claim 5, characterized in that the lifting drive (5) is built in the housing of the turntable (2), the lifting link (4) being externally arranged to the boom (1).
7. Boom system according to claim 5 or 6, characterized in that the front hinge (21) and the rear hinge (22) are provided at the front and rear end of the turntable (2), respectively.
8. Boom system according to claim 7, characterized in that the rear hinge (22) is higher than the front hinge (21).
9. Boom control method applied to the boom system of any of claims 1 to 8, characterized in that the control method comprises:
judging that the expected cloth height is not larger than the current cloth height of the arm support (1);
maintaining the lifting drive (5) in a restrained state;
controlling the rotary driving piece (3) to drive the arm support (1) to be unfolded to a specified pitching angle;
judging that the expected cloth height is larger than the current cloth height of the arm support (1);
simultaneously triggering the rotary drive (3) and the lifting drive (5).
10. Engineering machine, characterized in that the engineering machine (200) comprises a vehicle body (210) and a boom system (100) according to any of claims 1 to 8, the turntable (2) being arranged close to a vehicle head (220) of the vehicle body (210), the boom (1) extending towards the rear side of the vehicle head (220) in a horizontal position.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210254351.XA CN114737763B (en) | 2022-03-15 | 2022-03-15 | Arm support system, control method and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210254351.XA CN114737763B (en) | 2022-03-15 | 2022-03-15 | Arm support system, control method and engineering machinery |
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| CN114737763A CN114737763A (en) | 2022-07-12 |
| CN114737763B true CN114737763B (en) | 2024-01-19 |
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| US6276541B1 (en) * | 1999-02-26 | 2001-08-21 | Potain | Device for simultaneously unfolding or folding crane jib tip elements |
| CN103832934A (en) * | 2012-11-26 | 2014-06-04 | 徐州徐工随车起重机有限公司 | Foldable car crane |
| CN103321424A (en) * | 2013-06-04 | 2013-09-25 | 三一汽车制造有限公司 | Boom system and concrete pump truck |
| CN103470048A (en) * | 2013-09-03 | 2013-12-25 | 三一汽车制造有限公司 | Engineering machine and luffing mechanism therefor |
| CN103526942A (en) * | 2013-09-25 | 2014-01-22 | 三一汽车制造有限公司 | Concrete pump truck and arm frame connecting mechanism thereof |
| CN208747582U (en) * | 2018-08-20 | 2019-04-16 | 湖南运想重工有限公司 | A kind of straight-arm aerial work platform |
| CN109263533A (en) * | 2018-09-26 | 2019-01-25 | 三汽车制造有限公司 | Turntable arm support system and special vehicle |
| CN112573401A (en) * | 2020-11-30 | 2021-03-30 | 长沙中联消防机械有限公司 | Adjustable amplitude-variable hinge point system, elevating fire truck or overhead working truck |
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