Boom device and construction machinery

Abstract

The present invention provides a boom device and engineering machinery, the boom device comprising: a boom structure, a first end of which is hinged to a first hinge point of a turntable; a boom cylinder, a first end of which is hinged to a second hinge point of the turntable, and a second end of which is hinged to a third hinge point of the boom structure; an auxiliary cylinder, a first end of which is hinged to a fourth hinge point of the turntable, and a second end of which is hinged to a fifth hinge point of the boom structure, the boom cylinder and the auxiliary cylinder being used to synchronously drive the boom structure to raise its arm, the fourth hinge point being located between the first hinge point and the second end of the boom structure, and the fourth hinge point being arranged close to the first hinge point. The boom device of the present invention installs the boom cylinder and the auxiliary cylinder on the turntable, supports the boom cylinder and the auxiliary cylinder through the turntable, and can drive the boom structure to raise its arm through the cooperation of the boom cylinder and the auxiliary cylinder, thereby avoiding insufficient thrust for raising the arm while ensuring support strength, thereby ensuring the safety and reliability of raising the arm structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering machinery, and in particular relates to a boom device and engineering machinery. Background Art

[0002] At present, when construction machinery such as truck cranes are in boom-raising operation, the boom is usually adjusted from the horizontal zero position to the corresponding boom-raising angle by the thrust of the boom cylinder arranged just below the boom structure.

[0003] As the tonnage of newly developed truck cranes continues to break through, the larger the crane's tonnage, the greater the thrust required from the luffing cylinders during boom-raising operation. Especially during jib-raising operation, a single or dual luffing cylinder is often unable to meet the thrust requirements, significantly impacting operational safety and reliability. Summary of the Invention

[0004] The main purpose of the present invention is to provide a boom device and engineering machinery, aiming to solve the technical problem of poor safety and reliability of boom raising in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a boom device, which includes: a boom structure, a first end of which is hinged to the first hinge point of a turntable; a boom cylinder, a first end of which is hinged to the second hinge point of the turntable, and a second end of which is hinged to the third hinge point of the boom structure; an auxiliary cylinder, a first end of which is hinged to the fourth hinge point of the turntable, and a second end of which is hinged to the fifth hinge point of the boom structure, the boom cylinder and the auxiliary cylinder are used to synchronously drive the boom structure to raise the arm, the fourth hinge point is located between the first hinge point and the second end of the boom structure, and the fourth hinge point is arranged close to the first hinge point.

[0006] In an embodiment of the present invention, the arm device also includes: a loading and unloading pin mechanism, including a power pin and a pin driving member connected to the power pin, the auxiliary oil cylinder is hinged to the fifth hinge point through the power pin, and the pin driving member is used to drive the power pin to move along the axial direction of the power pin, and to make the power pin detach from or hinged to the arm structure.

[0007] In an embodiment of the present invention, the arm device also includes a controller electrically connected to the pin drive member, and the controller is configured to: determine that the auxiliary oil cylinder is in a disengaged pin condition, and control the pin drive member to move in the reverse direction until the power pin is disengaged from the arm structure; determine that the auxiliary oil cylinder is in a pin-plugging condition, and control the pin drive member to move in the forward direction until the power pin is articulated to the arm structure.

[0008] In an embodiment of the present invention, the arm device also includes a suspension mechanism, one end of the suspension mechanism is hinged to the auxiliary oil cylinder, and the other end is hinged to the sixth hinge point of the arm structure. The suspension mechanism is used to drive the auxiliary oil cylinder to move away from or closer to the arm structure in the up and down directions.

[0009] In an embodiment of the present invention, the suspension mechanism and the controller are electrically connected, and the controller is further configured to: determine that the power pin is detached from the arm structure, control the suspension mechanism to drive the auxiliary cylinder to move until the auxiliary cylinder moves to an avoidance position, and an avoidance gap is formed between the auxiliary cylinder in the avoidance position and the arm structure; determine that the arm structure returns to a preset latch position, control the suspension mechanism to drive the auxiliary cylinder to move until the auxiliary cylinder moves to the auxiliary latch position, and the pin hole center of the auxiliary cylinder in the auxiliary latch position coincides with the fifth hinge point.

[0010] In an embodiment of the present invention, the suspension mechanism includes: a telescopic component, one end of which is hinged to the sixth hinge point; a folding component, one end of which is hinged to the cylinder body of the auxiliary oil cylinder, and the other end of the telescopic component is hinged to the other end of the folding component. The controller is electrically connected to the telescopic component, and the controller is used to control the telescopic movement of the telescopic component.

[0011] In an embodiment of the present invention, the telescopic assembly includes a connecting outer plate and a telescopic inner rod sleeved inside the connecting outer plate, the telescopic inner rod is used to telescope relative to the connecting outer plate under the control of the controller, the connecting outer plate and the folding assembly are hinged, and the telescopic inner rod and the arm structure are hinged; and / or, the folding assembly includes at least two folding pull plates, and two adjacent folding pull plates are connected by a folding waist hole.

[0012] In an embodiment of the present invention, the boom device includes: an angle detection component for detecting the current amplitude adjustment angle of the amplitude adjustment cylinder and the auxiliary cylinder; a pressure detection component for detecting the current pressure of the amplitude adjustment cylinder and the auxiliary cylinder; the angle detection component and the pressure detection component are both electrically connected to the controller; the controller is further configured to: control the extension length of the amplitude adjustment cylinder and the auxiliary cylinder according to the current amplitude adjustment angle, so that the amplitude adjustment cylinder and the auxiliary cylinder can be adjusted at the same angle.

[0013] In an embodiment of the present invention, the arm device also includes a distance detection component electrically connected to the controller, and the distance detection component is used to detect the pin distance between the pin hole of the auxiliary oil cylinder and the fifth hinge point; the controller is further configured to: determine the working condition of the auxiliary oil cylinder based on the current amplitude adjustment angle, current pressure and pin distance.

[0014] In an embodiment of the present invention, the auxiliary oil cylinders are provided on both sides of the arm structure along the vehicle width direction; and / or the fifth hinge point is located at the lower side of the arm structure.

[0015] In an embodiment of the present invention, the first hinge point, the second hinge point, the fourth hinge point, the fifth hinge point and the third hinge point are sequentially arranged along the arm length direction of the boom structure.

[0016] The present invention also provides an engineering machine, which includes the boom device as described above.

[0017] Through the above technical solution, the arm support device provided by the embodiment of the present invention has the following beneficial effects:

[0018] When using the boom device to perform a boom raising operation, the cylinder body of the luffing cylinder is hinged to the turntable, the piston rod is hinged to the boom structure, the cylinder body of the auxiliary cylinder is hinged to the turntable, and the piston rod is hinged to the boom structure. The luffing cylinder serves as the main cylinder, and the auxiliary cylinder assists the main cylinder. The two cylinders can synchronously drive the boom structure to raise the boom. In cases where the thrust of the existing cylinders does not meet the requirements for self-raising of the boom under the boom raising working condition, the auxiliary cylinder can be newly added to increase the thrust, compensate for the insufficient thrust of the existing cylinders, and complete the self-raising of the boom. In addition, the luffing cylinder and the auxiliary cylinder in this embodiment are both hinged to the turntable. Compared with arrangements in other positions, this can ensure the support strength of the turntable for the luffing cylinder and the auxiliary cylinder, thereby improving the boom structure's stability when raising the boom. In the present invention, by installing the luffing cylinder and the auxiliary cylinder on the turntable, and supporting the luffing cylinder and the auxiliary cylinder through the turntable, the luffing cylinder and the auxiliary cylinder can cooperate with each other to drive the boom structure to lift the arm, avoiding insufficient lifting thrust while ensuring the support strength, thereby ensuring the safety and reliability of the boom structure lifting the arm.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 is a schematic structural diagram of an arm support device in one state according to an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of an arm support device in another state according to an embodiment of the present invention;

[0023] Figure 3 is a structural schematic diagram of an arm support device in another state according to an embodiment of the present invention;

[0024] Figure 4 yes Figure 3 An enlarged schematic diagram of the middle part of the structure;

[0025] Figure 5 is a partial structural diagram of an arm support device according to another embodiment of the present invention;

[0026] Figure 6 is a schematic structural diagram of a telescopic assembly of an arm device according to one embodiment of the present invention;

[0027] Figure 7 2 is a schematic structural diagram of a folding assembly of an arm device according to an embodiment of the present invention.

[0028] Description of Reference Numerals

[0029] DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0031] The boom device according to the present invention will be described below with reference to the accompanying drawings.

[0032] like Figures 1 to 7 As shown, in an embodiment of the present invention, the boom device includes a boom structure 1, a boom cylinder 3 and an auxiliary cylinder 4, the boom structure 1, the first end of which is hinged to the first hinge point 21 of the turntable 2; the boom cylinder 3, the first end of which is hinged to the second hinge point 22 of the turntable 2, and the second end of which is hinged to the third hinge point 11 of the boom structure 1; the auxiliary cylinder 4, the first end of which is hinged to the fourth hinge point 23 of the turntable 2, and the second end of which is hinged to the fifth hinge point 12 of the boom structure 1, the boom cylinder 3 and the auxiliary cylinder 4 are used to synchronously drive the boom structure 1 to raise the arm, the fourth hinge point 23 is located between the first hinge point 21 and the second end of the boom structure 1, and the fourth hinge point 23 is arranged close to the first hinge point 21.

[0033] The boom structure 1 may include a base arm and a telescopic arm that is telescopically connected to the base arm. The front end of the base arm may be hinged to the turntable 2. The luffing cylinder 3 and the auxiliary cylinder 4 may both be hinged to the base arm of the boom structure 1. The boom device in this embodiment is mainly used in construction machinery 100 such as truck cranes.

[0034] It is understood that the boom structure 1 in this embodiment may be provided with a luffing support 14 and an auxiliary support 15. The luffing cylinder 3 may be hinged to the third hinge point 11 of the boom structure 1 via the luffing support 14, and the auxiliary cylinder 4 may be hinged to the fifth hinge point 12 of the boom structure 1 via the auxiliary support 15. The boom structure 1 may be hinged to the turntable 2 via a pin structure, and the ends of the luffing cylinder 3 may be hinged to the turntable 2 and the boom structure 1, respectively, via pin structures. Figure 1 The boom structure 1 is at zero position, and the top surface of the boom structure 1 is higher than the top of the luffing cylinder 3 and the auxiliary cylinder 4, which can fully utilize the installation space between the boom structure 1 and the turntable 2. Figure 2 The boom structure 1 is in the arm-up position and the auxiliary cylinder 4 is working. Figure 3 The boom structure 1 is in another lifting position and the auxiliary cylinder 4 is disengaged from the boom structure 1. It should be noted that the first hinge point 21, the second hinge point 22, and the fourth hinge point 23 can be arranged sequentially on the turntable 2 in the vertical direction. The cylinder thrust of the auxiliary cylinder 4 is less than the cylinder thrust of the luffing cylinder 3, and the cylinder stroke of the auxiliary cylinder 4 is less than the cylinder stroke of the luffing cylinder 3. Specifically, the cylinder thrust of the auxiliary cylinder 4 is determined by subtracting the cylinder thrust of the luffing cylinder 3 from the thrust required for lifting the boom structure 1. The cylinder stroke of the auxiliary cylinder 4 can be determined by the distance between the auxiliary support 15 on the boom structure 1 and the second hinge point 22 and the fourth hinge point 23 mounted on the turntable 2. The first and second ends of the boom structure 1 are respectively arranged at the front and rear ends, with the front end hinged to the turntable 2. The front ends of the luffing cylinder 3 and the auxiliary cylinder 4 are both hinged to the turntable 2, and the rear ends of the luffing cylinder 3 and the auxiliary cylinder 4 are both hinged to the base boom. The turntable 2 is arranged at the front end of the basic arm, and the second hinge point 22 and the fourth hinge point 23 are both arranged close to the front end of the basic arm. The boom cylinder 3 and the auxiliary cylinder 4 are both arranged at the rear end of the turntable 2. While ensuring the supporting strength of the turntable 2 for the auxiliary cylinder 4, the position of the auxiliary cylinder 4 is set at the rear, which can make the auxiliary boom angle larger when the cylinder stroke of the auxiliary cylinder 4 is the same.

[0035] When the boom device of this embodiment is used to perform a boom raising operation, the cylinder body of the variable-length oil cylinder 3 is hinged to the turntable 2, the piston rod is hinged to the boom structure 1, the cylinder body of the auxiliary oil cylinder 4 is hinged to the turntable 2, and the piston rod is hinged to the boom structure 1. The variable-length oil cylinder 3 serves as the main oil cylinder, and the auxiliary oil cylinder 4 assists the main oil cylinder. The two oil cylinders can synchronously drive the boom structure 1 to raise the boom. In response to the situation where the thrust of the existing oil cylinder does not meet the requirements of the boom raising working condition for self-raising, the auxiliary oil cylinder 4 can be newly provided to increase the thrust, make up for the insufficient thrust of the existing oil cylinder, and complete the self-raising of the boom. In addition, the variable-length oil cylinder 3 and the auxiliary oil cylinder 4 in this embodiment are both hinged to the turntable 2. Compared with being arranged in other positions, this can ensure the support strength of the turntable 2 for the variable-length oil cylinder 3 and the auxiliary oil cylinder 4, thereby improving the boom raising stability of the boom structure 1. In addition, the auxiliary cylinder 4 is hinged to the fourth hinge point 23 of the turntable 2, and the fourth hinge point 23 is located between the first hinge point 21 and the second end of the boom structure 1. This allows the auxiliary cylinder 4 to be positioned rearward, achieving a smaller cylinder telescopic stroke, thereby controlling the boom to achieve large-angle luffing. In this embodiment, by mounting the luffing cylinder 3 and the auxiliary cylinder 4 on the turntable 2 and supporting the luffing cylinder 3 and the auxiliary cylinder 4 via the turntable 2, the luffing cylinder 3 and the auxiliary cylinder 4 can cooperate to drive the boom structure 1 to raise the boom, thereby avoiding insufficient lifting thrust while ensuring support strength, thereby ensuring the safety and reliability of the boom structure 1 during raising.

[0036] The auxiliary oil cylinder 4 in this embodiment is arranged below the basic arm, does not occupy any space on the arm structure 1, and the space arrangement is more reasonable. It can avoid the situation where the height of the auxiliary oil cylinder 4 is too high and affects the size of the whole vehicle, and at the same time avoid the center of gravity becoming higher and affecting the stability of the whole vehicle.

[0037] In one embodiment, the boom assembly further includes a pin assembly and disassembly mechanism, comprising a power pin 5 and a pin drive connected to the power pin 5. The auxiliary cylinder 4 is hinged to the fifth hinge point 12 via the power pin 5. The pin drive is configured to drive the power pin 5 to move axially along the power pin 5, thereby disengaging or articulating the power pin 5 to the boom structure 1. The pin drive can drive the power pin 5 to reciprocate along its own axis, thereby enabling assembly and disassembly of the power pin 5, eliminating the need for manual assembly and disassembly of the power pin 5 and improving assembly and disassembly efficiency. When the auxiliary cylinder 4 reaches its maximum extension stroke, or when the auxiliary cylinder 4 is no longer needed for auxiliary arm raising, the pin drive can disengage the power pin 5, disengaging the piston rod of the auxiliary cylinder 4 from the boom structure 1. When the auxiliary cylinder 4 is required for auxiliary arm raising or resetting, the pin drive can drive the power pin 5 through the pin, engaging the piston rod of the auxiliary cylinder 4 with the boom structure 1.

[0038] Specifically, the boom device further includes a controller, the loading and unloading pin mechanism includes a power pin 5 and a pin driving member driving the power pin 5, the auxiliary oil cylinder 4 is used to be hinged to the fifth hinge point 12 through the power pin 5; the controller is electrically connected to the pin driving member;

[0039] The controller is configured as:

[0040] Make sure the auxiliary oil cylinder 4 is in the pin-out working condition, and control the pin driving member to move in the reverse direction until the power pin 5 is separated from the boom structure 1;

[0041] Make sure the auxiliary oil cylinder 4 is in the latching working state, and control the pin driving member to move in the forward direction until the power pin 5 is articulated to the boom structure 1.

[0042] The pin driving member in this embodiment can adopt an oil cylinder structure. The pin driving member is electrically connected to the controller. Under the control of the controller, the pin driving member can drive the power pin 5 to reciprocate along its own axial direction, thereby realizing the disassembly and assembly of the power pin 5.

[0043] Specifically, the cylinder stroke of the auxiliary cylinder 4 in this embodiment is smaller than the cylinder stroke of the boom cylinder 3, which can reduce the overall cost of the boom device. When the boom structure 1 is raised to a preset disengagement angle, the auxiliary cylinder 4 is not needed to assist in raising the boom. It can be determined that the auxiliary cylinder 4 is in a disengagement condition, and the controller can send a disengagement signal to the pin drive component. The pin drive component can drive the power pin 5 in the disengagement direction until the power pin 5 is disengaged from the boom structure 1, so that the piston rod of the auxiliary cylinder 4 is disengaged from the basic arm, and the boom cylinder 3 is opened to independently perform the boom operation.

[0044] After the boom structure 1 has completed its boom length variation operation, the boom structure 1 can be retracted and returned to its original position. When the boom structure 1 is returned to the preset latch angle and the pin hole of the auxiliary cylinder 4 is aligned with the fifth hinge point 12, it can be determined that the auxiliary cylinder 4 is in the latching condition. The controller can send a latching signal to the pin driving component, and the pin driving component can drive the power pin 5 in the direction of pin removal. The direction of pin removal is opposite to the direction of pin insertion, until the power pin 5 is returned to the hinged position, so that the piston rod of the auxiliary cylinder 4 and the basic arm are hinged through the power pin 5.

[0045] In this embodiment, the auxiliary oil cylinder 4 and the basic arm are hinged by a loading and unloading pin mechanism, which enables the auxiliary oil cylinder 4 to be self-assembled and disassembled during the arm raising and retraction process of the arm structure 1. When the arm structure 1 changes its amplitude to a preset unpinning angle, the situation in which the auxiliary oil cylinder 4 has a limited stroke and needs to be manually disassembled can be avoided. At the same time, the situation in which the auxiliary oil cylinder 4 restricts the arm raising of the arm structure 1 can also be avoided. When the arm structure 1 is retracted to the preset latch angle and the pin hole of the auxiliary oil cylinder 4 is aligned with the fifth hinge point 12, the loading and unloading pin mechanism re-articulates the piston rod of the auxiliary oil cylinder 4 and the basic arm, which can facilitate subsequent arm raising operations and greatly improve the arm raising convenience of the arm structure 1. The preset unpinning angle and the preset latch angle can be the same angle, or the preset latch angle can be smaller than the preset unpinning angle. In other embodiments, the pin drive member can also adopt other drive structure forms.

[0046] It should be noted that the boom device also includes a suspension mechanism 6, one end of the suspension mechanism 6 is hinged to the auxiliary oil cylinder 4, and the other end is hinged to the sixth hinge point 13 of the boom structure 1. The suspension mechanism 6 is used to drive the auxiliary oil cylinder 4 away from or close to the boom structure 1 in the vertical direction. In the case that the piston rod of the auxiliary oil cylinder 4 is separated from the boom structure 1, the auxiliary oil cylinder 4 can be suspended below the boom structure 1 through the suspension mechanism 6, which can avoid the auxiliary oil cylinder 4 from being separated from the boom structure 1. At the same time, the suspension mechanism 6 can drive the auxiliary oil cylinder 4 away from or close to the boom structure 1 in the vertical direction. During the boom structure 1 amplitude change process, and the piston rod of the auxiliary oil cylinder 4 is separated from the boom structure 1, the suspension mechanism 6 can drive the auxiliary oil cylinder 4 away from the boom structure 1 to avoid interference with the boom structure 1 or other components. When the auxiliary oil cylinder 4 is needed to assist in boom raising or reset, the suspension mechanism 6 can drive the auxiliary oil cylinder 4 toward the boom structure 1 until the pin hole of the piston rod on the auxiliary oil cylinder 4 is aligned with the fifth hinge point 12 on the boom structure 1. The pin drive member drives the power pin 5 along its own axis to achieve the insertion of the power pin 5. In this embodiment, the suspension mechanism 6 can automatically align the auxiliary oil cylinder 4 with the boom structure 1. At the same time, the auxiliary oil cylinder 4 can be suspended when the auxiliary oil cylinder 4 is not assisting in boom raising to avoid displacement of the auxiliary oil cylinder 4, which can facilitate the subsequent connection and reset of the auxiliary oil cylinder 4.

[0047] Specifically, the suspension mechanism 6 is electrically connected to the controller, and the controller is further configured as follows:

[0048] Determine that the power pin 5 is separated from the boom structure 1, control the suspension mechanism 6 to drive the auxiliary cylinder 4 to move until the auxiliary cylinder 4 moves to the avoidance position, and an avoidance gap is formed between the auxiliary cylinder 4 in the avoidance position and the boom structure 1;

[0049] Determine that the arm structure 1 returns to the preset latch position, control the suspension mechanism 6 to drive the auxiliary cylinder 4 to move until the auxiliary cylinder 4 moves to the auxiliary latch position, and the pin hole center of the auxiliary cylinder 4 in the auxiliary latch position coincides with the fifth hinge point 12.

[0050] In this embodiment, a pull plate support 16 may be further provided on the arm structure 1 , and the suspension mechanism 6 may be hinged to the sixth hinge point 13 of the arm structure 1 via the pull plate support 16 .

[0051] When the boom structure 1 is raised to a preset disengagement angle, the auxiliary oil cylinder 4 is not needed to assist in raising the boom, and it can be determined that the auxiliary oil cylinder 4 is in a disengagement condition. The controller can send a disengagement signal to the pin driving component, and the pin driving component can drive the power pin 5 along the disengagement direction until the power pin 5 is disengaged from the boom structure 1. When it is determined that the power pin 5 is disengaged from the boom structure 1, the controller can send a folding signal to the suspension mechanism 6, and the cylinder body of the auxiliary oil cylinder 4 and the suspension mechanism 6 are hinged. The suspension mechanism 6 can drive the auxiliary oil cylinder 4 to move downward to an avoidance position, so that an avoidance gap is formed between the auxiliary oil cylinder 4 in the avoidance position and the boom structure 1, so as to avoid the auxiliary oil cylinder 4 interfering with other components, and the auxiliary oil cylinder 4 is suspended below the basic arm through the suspension mechanism 6.

[0052] After the boom structure 1 has completed its boom length adjustment operation, the boom structure 1 can be retracted and returned to its original position. When the boom structure 1 has returned to the preset latch position, the controller can send a return signal to the suspension mechanism 6, so that the suspension mechanism 6 drives the auxiliary cylinder 4 to return to the latch position. The pin hole center of the auxiliary cylinder 4 in the latch position coincides coaxially with the fifth hinge point 12. The controller can determine that the auxiliary cylinder 4 is in the latch working condition. The controller can send a latch signal to the pin drive component. The pin drive component can drive the power pin 5 in the direction of dismantling the pin. The dismantling direction is opposite to the latching direction until the power pin 5 returns to the hinged position, so that the piston rod of the auxiliary cylinder 4 and the basic arm are hinged through the power pin 5.

[0053] like Figure 6 and Figure 7 As shown, the suspension mechanism 6 includes a telescopic assembly 61 and a folding assembly 62. The telescopic assembly 61 has one end hinged to the sixth hinge point 13; the folding assembly 62 has one end hinged to the cylinder body of the auxiliary oil cylinder 4. The other end of the telescopic assembly 61 is hinged to the other end of the folding assembly 62. A controller is electrically connected to the telescopic assembly 61, and the controller is used to control the telescopic movement of the telescopic assembly 61. The suspension mechanism 6 in this embodiment may include the telescopic assembly 61 at the upper end and the folding assembly 62 articulated to the telescopic assembly 61. The telescopic assembly 61 can telescope along its own length. During the rotation of the boom structure 1, the folding assembly 62 can fold or unfold along its own length under the action of the auxiliary oil cylinder 4. The controller is electrically connected to the telescopic assembly 61, and the telescopic assembly 61 can adopt a cylinder structure or other drive structure.

[0054] The controller sends a folding signal to the telescopic component 61, and the telescopic component 61 can be extended along its own length direction, so that the length of the telescopic component 61 becomes longer and the boom structure 1 can be avoided autonomously. When the angle of the boom structure 1 continues to increase, the folding component 62 can be unfolded under the gravity of the auxiliary oil cylinder 4 in the folded state, so that the auxiliary oil cylinder 4 can avoid the boom structure 1. When the controller sends a return signal to the telescopic component 61, the telescopic component 61 can be retracted along its own length direction, so that the length of the telescopic component 61 becomes shorter, shortening the distance between the boom structure 1 and the auxiliary oil cylinder 4. At the same time, the boom structure 1 moves downward, and the two ends of the folding component 62 are respectively subjected to the reaction force between the retraction component and the amplitude cylinder 3, and can be folded autonomously, further pulling the distance between the auxiliary oil cylinder 4 and the boom structure 1. In this embodiment, a telescopic component 61 is provided at the upper end of the suspension mechanism 6, and a folding component 62 is provided at the lower end, and the telescopic component 61 and the folding component 62 are hingedly connected. The telescopic component 61 can rotate relative to the folding component 62, so that the contraction process of the suspension mechanism 6 is smoother, and the two length-variable structures can make the gap between the auxiliary cylinder 4 and the arm structure 1 adjustable within a larger range, thereby avoiding the situation where the auxiliary cylinder 4 interferes with other components.

[0055] Specifically, the telescopic assembly 61 includes a connecting outer plate 611 and a telescopic inner rod 612 sleeved in the connecting outer plate 611. The telescopic inner rod 612 is used to extend and retract relative to the connecting outer plate 611 under the control of the controller. The connecting outer plate 611 and the folding assembly 62 are hinged, and the telescopic inner rod 612 and the arm structure 1 are hinged; Figure 6 As shown, in this embodiment, the telescopic assembly 61 adopts a cylinder structure. The end of the telescopic inner rod 612 away from the folding assembly 62 is hinged to the basic arm. The end of the outer plate 611 connected to the folding assembly 62 is a hollow cylindrical structure, and the end of the outer plate 611 connected to the folding assembly 62 is a plate-like structure, which can facilitate the hinge between the telescopic assembly 61 and the folding assembly 62. In addition, the folding assembly 62 includes at least two folding pull plates 621, and the adjacent two folding pull plates 621 are connected by folding waist holes 622. Figure 7 As shown, in one embodiment, there are two folding plates 621, one of which is provided with a folding waist hole 622. The two folding plates 621 are connected by a pin structure that can slide along the folding waist hole 622 to fold or unfold the two folding plates 621 relative to each other. The folding plates 621 in this embodiment are flat-plate structures, which are simple and easy to connect. In other embodiments, the number of folding plates 621 can be set according to actual usage requirements and is not limited by the present invention.

[0056] In one embodiment, the boom device includes an angle detection component and a pressure detection component. The angle detection component is used to detect the current luffing angle of the luffing cylinder 3 and the auxiliary cylinder 4; the pressure detection component is used to detect the current pressure of the luffing cylinder 3 and the auxiliary cylinder 4. The angle detection component and the pressure detection component are both electrically connected to the controller.

[0057] The controller is further configured to:

[0058] The extension lengths of the luffing cylinder 3 and the auxiliary cylinder 4 are controlled according to the current luffing angle, so that the luffing cylinder 3 and the auxiliary cylinder 4 can luff at the same angle.

[0059] Specifically, the angle detection assembly may include at least two angle sensors 7, each of which may be provided on the cylinder bodies of the luffing cylinder 3 and the auxiliary cylinder 4. The pressure detection assembly may include at least two pressure sensors 8, each of which may be provided on the cylinder bodies of the luffing cylinder 3 and the auxiliary cylinder 4. An angle sensor 7 electrically connected to the controller may also be provided on the boom structure 1 to monitor the boom angle of the boom structure 1.

[0060] In one embodiment, the controller can receive the current amplitude variation angle of the amplitude variation cylinder 3 and the auxiliary cylinder 4 detected by the angle detection component, and adjust the extension length of the amplitude variation cylinder 3 and the auxiliary cylinder 4 according to the current amplitude variation angle, so that the current amplitude variation angle of the amplitude variation cylinder 3 and the auxiliary cylinder 4 remains consistent.

[0061] In another embodiment, the controller can receive the current amplitude adjustment angle of the amplitude adjustment cylinder 3 and the auxiliary cylinder 4 detected by the angle detection component, and at the same time, the controller can receive the current pressure of the amplitude adjustment cylinder 3 and the auxiliary cylinder 4 detected by the pressure detection component, and combine the angle and monitoring to control the amplitude adjustment length of the amplitude adjustment cylinder 3 and the auxiliary cylinder 4, so that the amplitude adjustment cylinder 3 and the auxiliary cylinder 4 can be synchronized to ensure the stability, safety and reliability of the operation.

[0062] In yet another embodiment, the boom device further comprises a distance detection member electrically connected to the controller, the distance detection member being used to detect the distance between the pin hole of the auxiliary oil cylinder 4 and the fifth hinge point 12;

[0063] The controller is further configured to:

[0064] The working condition of the auxiliary oil cylinder 4 is determined according to the current amplitude adjustment angle, the current pressure and the latch distance.

[0065] The distance detection element in this embodiment can be a distance sensor 9, and there can be multiple distance sensors 9. Distance sensor 9 is located at the end of the piston rod of the auxiliary oil cylinder 4 away from the turntable 2. In this embodiment, the distance sensor 9 is located near the pin hole of the auxiliary oil cylinder 4, which can improve the detection accuracy of distance sensor 9. In this embodiment, the angle sensor 7, pressure sensor 8, and distance sensor 9 cooperate with each other. The controller can control the suspension mechanism 6 and the assembly and disassembly pin mechanism to complete the precise and automatic separation and assembly of the auxiliary oil cylinder 4 from the base arm. This fully automated process avoids manual disassembly and assembly during each operation, thereby improving operational efficiency.

[0066] The controller can determine whether the auxiliary cylinder 4 is in a disengaged condition by combining the current amplitude adjustment angles of the amplitude adjustment cylinder 3 and the auxiliary cylinder 4, the current pressures of the amplitude adjustment cylinder 3 and the auxiliary cylinder 4, and the latch distance to determine whether the three simultaneously meet the disengagement conditions. By combining the three conditions, the situation of accidental disengagement can be avoided, thereby improving the safety of operation. The controller can determine whether the auxiliary cylinder 4 is in a latching condition by combining the current amplitude adjustment angles of the amplitude adjustment cylinder 3 and the auxiliary cylinder 4, the current pressures of the amplitude adjustment cylinder 3 and the auxiliary cylinder 4, and the latch distance to determine whether the three simultaneously meet the latching conditions. This can avoid the situation of accidental latching and further improve the safety of operation.

[0067] like Figure 4 As shown, in one embodiment, auxiliary cylinders 4 are installed on both sides of the boom structure 1 along the vehicle width direction; and the fifth hinge point 12 is located on the lower side of the boom structure 1. In this embodiment, the luffing cylinders 3 are symmetrically arranged, one on each side of the base boom, and the auxiliary supports 15 are positioned directly below the base boom. In other embodiments, the number and placement of the luffing supports 14 and auxiliary cylinders 4 can be adjusted based on the layout of the luffing cylinders 3, the required boom lift thrust and cylinder operating capacity, as well as the structural characteristics of the turntable 2 and base boom.

[0068] In one embodiment, one luffing cylinder 3 is arranged directly below the base boom, and the auxiliary cylinder 4 can be arranged directly below the base boom. In another embodiment, one luffing cylinder 3 is arranged directly below the base boom, and two auxiliary cylinders 4 are symmetrically arranged on either side of the base boom. In yet another embodiment, one luffing cylinder 3 is arranged directly below the base boom, and two auxiliary cylinders 4 are symmetrically arranged on either side of the base boom, with one auxiliary cylinder 4 also arranged directly below the base boom. The number of luffing cylinders 3 and the number of auxiliary cylinders 4 in the present invention can be adjusted according to needs.

[0069] It should be noted that the first hinge point 21, the second hinge point 22, the fourth hinge point 23, the fifth hinge point 12, and the third hinge point 11 are sequentially arranged along the arm length of the boom structure 1. The fifth hinge point 12 may be located between the sixth hinge point 13 and the third hinge point 11 along the arm length of the basic boom. In this embodiment, the luffing cylinder 3 and the auxiliary cylinder 4 are both hinged to the rear end of the turntable 2. The first hinge point 21, the second hinge point 22, the fourth hinge point 23, the sixth hinge point 13, the fifth hinge point 12, and the third hinge point 11 are sequentially spaced apart along the front-to-back direction. The mounting point of the auxiliary cylinder 4 is located at the rear side of the luffing cylinder 3, ensuring the luffing angle of the auxiliary cylinder 4. The first hinge point 21, the second hinge point 22 and the fourth hinge point 23 are arranged in sequence along the up and down directions, so that the variable-length cylinder 3 and the auxiliary cylinder 4 are located below the basic arm, which can fully utilize the installation space between the turntable 2 and the basic arm. The height of the third hinge point 11 is higher than the height of the fifth hinge point 12, which can facilitate the installation of the auxiliary cylinder 4 while ensuring the auxiliary arm raising of the auxiliary cylinder 4.

[0070] The present invention also provides a construction machine 100 comprising a chassis 110 and a boom assembly as described above. The specific structure of the boom assembly is similar to that of the aforementioned embodiments. A turntable 2 is mounted on the upper side of the chassis 110, and a plurality of running wheels are provided on the lower side of the chassis 110. Since the construction machine 100 utilizes all the technical solutions of all the aforementioned embodiments, it possesses at least all the beneficial effects provided by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated here. In one embodiment, the construction vehicle can be used as a crane.

[0071] In one embodiment, the boom structure 1 starts to raise the boom from the zero position, the luffing cylinder 3 starts the luffing operation, the lower end of the auxiliary cylinder 4 is hinged to the turntable 2, and the upper end of the auxiliary cylinder 4 is connected to the auxiliary support 15 on the basic arm through the installed power pin 5 to generate auxiliary thrust. Under the detection of the angle sensor 7 and the pressure sensor 8, the controller controls the auxiliary cylinder 4 and the luffing cylinder 3 to complete the synchronous boom raising together.

[0072] like Figure 2 As shown, when the boom structure 1 is raised to the preset disengagement angle, the stroke of the auxiliary cylinder 4 is shorter than that of the luffing cylinder 3. Combined with the data detected by the pressure sensor 8 and the angle sensor 7, the controller determines that the luffing cylinder 3 can independently complete the remaining luffing work, and the controller can control the auxiliary cylinder 4 to separate from the boom structure 1.

[0073] The specific separation process is as follows: the controller combines the angle data and pressure data detected by the angle sensor 7 and the pressure sensor 8 to determine that the arm structure 1 raises the arm to the preset pin-off angle, and the controller controls the pin drive to drive the power pin 5 to automatically pull out the pin, and the auxiliary cylinder 4 is separated from the auxiliary support 15. The separated auxiliary cylinder 4 is suspended under the basic arm through the suspension mechanism 6.

[0074] After the boom structure 1 completes its lifting operation and begins to retract, the controller determines, by combining signals detected by the angle sensor 7, pressure sensor 8, and distance sensor 9, that the luffing cylinder 3 and the boom structure 1 have returned to the separated position of the auxiliary cylinder 4. The controller then controls the suspension mechanism 6 to automatically retract and adjust the position of the pin hole of the auxiliary cylinder 4 so that the pin hole of the auxiliary cylinder 4 coincides with the pin hole of the auxiliary support 15. When the signal from the distance sensor 9 indicates that the pin hole of the auxiliary cylinder 4 coincides coaxially with the pin hole of the auxiliary support 15, the controller issues a command to control the pin drive to automatically engage the pin, reconnecting the auxiliary cylinder 4 and the auxiliary support 15. Then, under the monitoring of the angle sensor 7 and pressure sensor 8, the controller controls the auxiliary cylinder 4 and the luffing cylinder 3 to complete the retraction of the boom structure 1. After the boom structure 1 is retracted, the controller controls the suspension mechanism 6 to retract, automatically folding it under the base boom to prevent interference between the suspension mechanism 6 and other components.

[0075] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0076] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0077] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0078] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A boom device, characterized in that: The arm device comprises: An arm structure (1), a first end of which is hinged to a first hinge point (21) of a turntable (2); A luffing cylinder (3), a first end of which is hinged to a second hinge point (22) of the turntable (2), and a second end of which is hinged to a third hinge point (11) of the boom structure (1); An auxiliary oil cylinder (4), a first end of which is hinged to a fourth hinge point (23) of the turntable (2), and a second end of which is hinged to a fifth hinge point (12) of the boom structure (1); the luffing oil cylinder (3) and the auxiliary oil cylinder (4) are used to synchronously drive the boom structure (1) to raise the arm; the fourth hinge point (23) is located between the first hinge point (21) and the second end of the boom structure (1), and the fourth hinge point (23) is arranged close to the first hinge point (21); The arm device also includes: A loading and unloading pin mechanism, comprising a power pin (5) and a pin driving member connected to the power pin (5), wherein the auxiliary oil cylinder (4) is hinged to the fifth hinge point (12) via the power pin (5), and the pin driving member is used to drive the power pin (5) to move along the axial direction of the power pin (5) and to cause the power pin (5) to be separated from or hinged to the arm structure (1); The boom device further comprises a suspension mechanism (6), one end of the suspension mechanism (6) being hinged to the auxiliary oil cylinder (4), and the other end being hinged to a sixth hinge point (13) of the boom structure (1), the suspension mechanism (6) being used to drive the auxiliary oil cylinder (4) to move away from or toward the boom structure (1) in the vertical direction; The arm device further includes a controller, and the suspension mechanism (6) includes: A telescopic assembly (61), one end of which is hinged to the sixth hinge point (13); One end of the folding assembly (62) is hinged to the cylinder body of the auxiliary oil cylinder (4), and the other end of the telescopic assembly (61) is hinged to the other end of the folding assembly (62). The controller is electrically connected to the telescopic assembly (61), and the controller is used to control the telescopic movement of the telescopic assembly (61).

2. The boom device according to claim 1, characterized in that: The pin drive is electrically connected to the controller, and the controller is configured to: Determining that the auxiliary oil cylinder (4) is in a pin-out condition, and controlling the pin driving member to move in the reverse direction until the power pin (5) is disengaged from the boom structure (1); Determine that the auxiliary oil cylinder (4) is in a pinning state, and control the pin driving member to move in a forward direction until the power pin (5) is hinged to the boom structure (1).

3. The boom device according to claim 1, characterized in that: The suspension mechanism (6) is electrically connected to the controller, and the controller is further configured to: Determining that the power pin (5) is detached from the boom structure (1), controlling the suspension mechanism (6) to drive the auxiliary oil cylinder (4) to move until the auxiliary oil cylinder (4) moves to an avoidance position, and an avoidance gap is formed between the auxiliary oil cylinder (4) in the avoidance position and the boom structure (1); The arm structure (1) is determined to be returned to a preset latch position, and the suspension mechanism (6) is controlled to drive the auxiliary oil cylinder (4) to move until the auxiliary oil cylinder (4) moves to the auxiliary latch position, and the center of the pin hole of the auxiliary oil cylinder (4) in the auxiliary latch position coincides with the fifth hinge point (12).

4. The boom device according to claim 1, characterized in that: The telescopic assembly (61) comprises a connecting outer plate (611) and a telescopic inner rod (612) sleeved within the connecting outer plate (611), the telescopic inner rod (612) being used to telescope relative to the connecting outer plate (611) under the control of the controller, the connecting outer plate (611) and the folding assembly (62) being hinged, and the telescopic inner rod (612) and the arm structure (1) being hinged; and / or, The folding assembly (62) comprises at least two folding pull plates (621), and two adjacent folding pull plates (621) are connected via a folding waist hole (622).

5. The boom device according to any one of claims 1 to 4, characterized in that: The arm device comprises: An angle detection component, used for detecting the current luffing angles of the luffing cylinder (3) and the auxiliary cylinder (4); A pressure detection component, used for detecting the current pressure of the amplitude-changing oil cylinder (3) and the auxiliary oil cylinder (4); The angle detection component and the pressure detection component are both electrically connected to the controller; The controller is further configured to: The extension lengths of the amplitude-changing oil cylinder (3) and the auxiliary oil cylinder (4) are controlled according to the current amplitude-changing angle, so that the amplitude-changing oil cylinder (3) and the auxiliary oil cylinder (4) are amplitude-changed at the same angle.

6. The boom device according to claim 5, characterized in that: The arm device further comprises a distance detection member electrically connected to the controller, the distance detection member being used to detect the distance between the pin hole of the auxiliary oil cylinder (4) and the fifth hinge point (12); The controller is further configured to: The working condition of the auxiliary oil cylinder (4) is determined according to the current amplitude variation angle, the current pressure and the latch distance.

7. The boom device according to any one of claims 1 to 4, characterized in that: The auxiliary oil cylinders (4) are provided on both sides of the arm structure (1) along the vehicle width direction; and / or, The fifth hinge point (12) is located on the lower side of the boom structure (1).

8. The boom device according to any one of claims 1 to 4, characterized in that: The first hinge point (21), the second hinge point (22), the fourth hinge point (23), the fifth hinge point (12), and the third hinge point (11) are arranged in sequence along the arm length direction of the boom structure (1).

9. An engineering machine (100), characterized in that: The engineering machinery (100) comprises the boom device according to any one of claims 1 to 8.

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