Cantilever crane device and engineering machinery

Abstract

The invention provides an arm support device and engineering machinery, and the arm support device comprises an arm support structure with a first end hinged to a first hinge point of a rotary table; the first end of the variable-amplitude oil cylinder is hinged to the second hinge point of the rotary table, and the second end of the variable-amplitude oil cylinder is hinged to the third hinge point of the arm support structure; the first end of the auxiliary oil cylinder is hinged to a fourth hinge point of the rotary table, the second end of the auxiliary oil cylinder is hinged to a fifth hinge point of the arm support structure, the variable-amplitude oil cylinder and the auxiliary oil cylinder are used for synchronously driving the arm support structure to rise an arm, the fourth hinge point is located between the first hinge point and the second end of the arm support structure, and the fourth hinge point is arranged close to the first hinge point. According to the cantilever crane device, the variable-amplitude oil cylinder and the auxiliary oil cylinder are installed on the rotary table, the variable-amplitude oil cylinder and the auxiliary oil cylinder are supported through the rotary table, the variable-amplitude oil cylinder and the auxiliary oil cylinder are matched to jointly conduct arm lifting driving on the cantilever crane structure, insufficient arm lifting thrust is avoided, and meanwhile the supporting strength can be ensured; and the safety and the reliability of arm lifting of the arm support structure are ensured.

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 the boom-raising condition, the boom is luffed from the horizontal zero position to the corresponding boom-raising angle, which is usually achieved through the thrust of the luffing cylinder arranged just below the boom structure.

[0003] With the continuous breakthrough in the tonnage of newly developed truck crane products, the larger the tonnage of the crane, the greater the thrust requirement of the luffing cylinder during the jib lifting condition. Especially during the jib lifting condition, a single or two luffing cylinders generally cannot meet the thrust requirement, which greatly affects the safety and reliability of the operation. Summary of the invention

[0004] The main purpose of the present invention is to provide a boom device and an engineering machine, aiming to solve the technical problem of poor safety and reliability of boom lifting 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 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 the 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.

[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 make the power pin detach from or hinged to the arm structure.

[0007] In an embodiment of the present invention, the boom device also includes a controller electrically connected to the pin driving member, and the controller is configured to: determine that the auxiliary oil cylinder is in a disengaged pin condition, and control the pin driving member to move in the reverse direction until the power pin is disengaged from the boom structure; determine that the auxiliary oil cylinder is in a latching pin condition, and control the pin driving member to move in the forward direction until the power pin is hinged to the boom 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, and 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 center of the pin hole of the auxiliary cylinder in the auxiliary latch position coincides with the fifth hinge.

[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 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 in 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 adjust the amplitude 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 according to the current amplitude change angle, the current pressure and the 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 arranged in sequence along the arm length direction of the boom structure.

[0016] The present invention also provides an engineering machine, which comprises 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 the boom device is used for the boom raising operation, the cylinder body of the variable-length oil cylinder is hinged to the turntable, the piston rod is hinged to the boom structure, the cylinder body of the auxiliary oil cylinder is hinged to the turntable, the piston rod is hinged to the boom structure, the variable-length oil cylinder serves as the main oil cylinder, and the auxiliary oil cylinder assists the main oil cylinder. The two oil cylinders can synchronously drive the boom structure to raise the arm. In view of the situation that the thrust of the oil cylinder in the prior art does not meet the requirements of the self-raising of the boom raising working condition, the auxiliary oil cylinder can be newly provided to increase the thrust, make up for the insufficient thrust of the oil cylinder in the prior art, and complete the self-raising of the boom. In addition, the variable-length oil cylinder and the auxiliary oil cylinder in this embodiment are both hinged to the turntable. Compared with being arranged in other positions, it can ensure the support strength of the turntable for the variable-length oil cylinder and the auxiliary oil cylinder, and improve the stability of the boom structure in raising the arm. In the present invention, a luffing cylinder and an auxiliary cylinder are installed on a turntable, and the luffing cylinder and the auxiliary cylinder are supported by the turntable. The boom structure can be driven to lift the arm through the cooperation of the luffing cylinder and the auxiliary cylinder, thereby avoiding insufficient lifting thrust and ensuring the supporting strength, thereby ensuring the safety and reliability of the arm lifting of the arm structure.

[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 specific embodiments, 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 schematic structural diagram of an arm support device in another state according to an embodiment of the present invention;

[0024] Figure 4 yes Figure 3 A magnified schematic diagram of the structure in the middle;

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

[0026] Figure 6 is a schematic diagram of the telescopic component structure of a boom device according to an embodiment of the present invention;

[0027] Figure 7 It is a schematic diagram of the folding component structure of the boom device according to one embodiment of the present invention.

[0028] Description of Reference Numerals

[0029] Label Name Label Name

[0030] 1 Boom structure 5 Power pin

[0031] 11 Third hinge point 6 Suspension mechanism

[0032] 12 Fifth hinge point 61 Telescopic component

[0033] 13 Sixth hinge point 611 connects outer plate

[0034] 14 Luffing support 612 telescopic inner rod

[0035] 15 Auxiliary support 62 Folding assembly

[0036] 16 Pull plate support 621 Folding pull plate

[0037] 2 Turntable 622 Folding waist hole

[0038] 21 First hinge point 7 Angle sensor

[0039] 22 Second hinge point 8 Pressure sensor

[0040] 23 Fourth hinge point 9 distance sensor

[0041] 3 Luffing Cylinder 100 Engineering Machinery

[0042] 4 Auxiliary cylinder 110 chassis DETAILED DESCRIPTION

[0043] The specific embodiments of the present invention are described in detail below in conjunction with 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 used to limit the present invention.

[0044] The boom device according to the present invention will be described below with reference to the accompanying drawings.

[0045] 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.

[0046] The boom structure 1 may include a basic arm and a telescopic arm that is telescopically connected to the basic arm, the front end of the basic arm may be hinged to the turntable 2, and the luffing cylinder 3 and the auxiliary cylinder 4 may be hinged to the basic arm of the boom structure 1. The boom device in this embodiment is mainly used in engineering machinery 100 such as a truck crane.

[0047] It can be 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 through the luffing support 14, and the auxiliary cylinder 4 may be hinged to the fifth hinge point 12 of the boom structure 1 through the auxiliary support 15. The boom structure 1 may be hinged to the turntable 2 through a pin structure, and both ends of the luffing cylinder 3 may be hinged to the turntable 2 and the boom structure 1 through the pin structure. 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, so that the installation space between the boom structure 1 and the turntable 2 can be fully utilized. Figure 2 The boom structure 1 is in the arm-up position and the auxiliary cylinder 4 is working. Figure 3The boom structure 1 is in another arm-raising position and the auxiliary cylinder 4 is separated 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 sequentially arranged on the turntable 2 along the up and down direction. The cylinder thrust of the auxiliary cylinder 4 is smaller than the cylinder thrust of the boom cylinder 3, and the cylinder stroke of the auxiliary cylinder 4 is smaller than the cylinder stroke of the boom cylinder 3. Specifically, the cylinder thrust of the auxiliary cylinder 4 is determined according to the thrust required for the boom structure 1 to raise the arm minus the cylinder thrust of the boom cylinder 3. The cylinder stroke of the auxiliary cylinder 4 can be determined according to the distance between the auxiliary support 15 on the boom structure 1 and the second hinge point 22 and the fourth hinge point 23 installed on the turntable 2. The first end and the second end of the boom structure 1 are respectively arranged at the front and rear ends, the front end is hinged to the turntable 2, the front ends of the boom cylinder 3 and the auxiliary cylinder 4 are hinged to the turntable 2, and the rear ends of the boom cylinder 3 and the auxiliary cylinder 4 are hinged to the basic arm. 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. Under the condition of ensuring the supporting strength of the turntable 2 for the auxiliary cylinder 4, the auxiliary cylinder 4 is arranged at the rear, so that the auxiliary boom angle can be larger when the cylinder stroke of the auxiliary cylinder 4 is the same.

[0048] When the boom device in this embodiment is used to perform the 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, 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 arm. In view of the situation that the thrust of the oil cylinder in the prior art does not meet the requirements of the self-raising of the boom raising working condition, the auxiliary oil cylinder 4 can be newly provided to increase the thrust, make up for the insufficient thrust of the oil cylinder in the prior art, 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, it can ensure the support strength of the turntable 2 to the variable-length oil cylinder 3 and the auxiliary oil cylinder 4, and improve the stability of the boom structure 1. In addition, the auxiliary oil 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, so that the auxiliary oil cylinder 4 can be positioned backward to achieve a smaller cylinder telescopic stroke, and the boom can be controlled to change its amplitude at a large angle. In this embodiment, by installing the amplitude cylinder 3 and the auxiliary oil cylinder 4 on the turntable 2, and supporting the amplitude cylinder 3 and the auxiliary oil cylinder 4 through the turntable 2, the boom structure 1 can be driven to lift the boom through the cooperation of the amplitude cylinder 3 and the auxiliary oil cylinder 4, avoiding insufficient lifting thrust while ensuring the support strength, and ensuring the safety and reliability of the boom structure 1 lifting the boom.

[0049] 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 has a more reasonable space arrangement. 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.

[0050] In one embodiment, the arm device further includes a loading and unloading pin mechanism, which includes a power pin 5 and a pin driving member connected to the power pin 5. The auxiliary oil cylinder 4 is hinged to the fifth hinge point 12 through the power pin 5. 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 make the power pin 5 detach from or hinge the arm structure 1. 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, which can avoid the situation of manual disassembly and assembly of the power pin 5 and improve the disassembly and assembly efficiency of the power pin 5. When the extension stroke of the auxiliary oil cylinder 4 reaches the maximum, or when the auxiliary oil cylinder 4 is not needed to assist the arm, the pin driving member can drive the power pin 5 to be disengaged from the pin, so that the piston rod of the auxiliary oil cylinder 4 is detached from the arm structure 1. When the auxiliary oil cylinder 4 is needed to assist the arm or the auxiliary oil cylinder 4 is needed to be reset, the pin driving member can drive the power pin 5 to pass through the pin, so that the piston rod of the auxiliary oil cylinder 4 is combined with the arm structure 1.

[0051] Specifically, the arm device also 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;

[0052] The controller is configured as:

[0053] Determine that the auxiliary oil cylinder 4 is in the pin-out condition, and control the pin driving member to move in the reverse direction until the power pin 5 is out of the boom structure 1;

[0054] Make sure that the auxiliary oil cylinder 4 is in the latching condition, and control the pin driving member to move forward until the power pin 5 articulates the boom structure 1.

[0055] The pin driving member in this embodiment can adopt an oil cylinder structure. The pin driving member and the controller are electrically connected. 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.

[0056] 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 raises the arm to a preset disengagement angle, there is no need for the auxiliary cylinder 4 to assist in raising the arm, and it can be determined that the auxiliary 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 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.

[0057] After the boom structure 1 is completed in its luffing operation, the luffing cylinder 3 can drive the boom structure 1 to recover and return to its original position. When the boom structure 1 returns 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 a 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, which is opposite to the direction of pin removal, 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.

[0058] In this embodiment, the auxiliary oil cylinder 4 and the basic arm are hinged by a loading and unloading pin mechanism, so that the auxiliary oil cylinder 4 can be self-disassembled and assembled during the arm raising and recovery process of the arm frame structure 1. When the arm frame structure 1 changes its amplitude to a preset pin-off angle, it can avoid the situation where the auxiliary oil cylinder 4 has a limited stroke and needs to be manually disassembled. At the same time, it can also avoid the situation where the auxiliary oil cylinder 4 limits the arm frame structure 1. When the arm frame structure 1 is recovered to a preset pin-off 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-hinges the piston rod of the auxiliary oil cylinder 4 and the basic arm, which can facilitate subsequent arm raising operations and greatly improve the convenience of arm raising of the arm frame structure 1. The preset pin-off angle and the preset pin-off angle can be the same angle or the preset pin-off angle can be smaller than the preset pin-off angle. In other embodiments, the pin drive member can also adopt other drive structure forms.

[0059] It should be noted that the arm 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 arm structure 1. The suspension mechanism 6 is used to drive the auxiliary oil cylinder 4 to move away from or approach the arm structure 1 in the up-down direction. In the case where the piston rod of the auxiliary oil cylinder 4 is separated from the arm structure 1, the auxiliary oil cylinder 4 can be suspended below the arm structure 1 through the suspension mechanism 6, which can avoid the auxiliary oil cylinder 4 from being separated from the arm structure 1. At the same time, the suspension mechanism 6 can drive the auxiliary oil cylinder 4 to move away from or approach the arm structure 1 in the up-down direction. In the process of changing the length of the boom structure 1, 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 interfering with the boom structure 1 or other components. When the auxiliary oil cylinder 4 is needed to assist in lifting the arm or to reset the auxiliary oil cylinder 4, the suspension mechanism 6 can drive the auxiliary oil cylinder 4 close to the boom structure 1 until the pin hole of the piston rod on the auxiliary oil cylinder 4 and the fifth hinge point 12 on the boom structure 1 are aligned, and the pin driving member drives the power pin 5 to move along the axis of the power pin 5 itself, so as to realize the insertion of the power pin 5. In this embodiment, the auxiliary oil cylinder 4 can be automatically aligned with the boom structure 1 through the suspension mechanism 6, and at the same time, the auxiliary oil cylinder 4 can be suspended when the auxiliary oil cylinder 4 does not assist in lifting the arm, so as to avoid displacement of the auxiliary oil cylinder 4, and facilitate the subsequent connection and reset of the auxiliary oil cylinder 4.

[0060] Specifically, the suspension mechanism 6 is electrically connected to the controller, and the controller is further configured as follows:

[0061] 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 at the avoidance position and the boom structure 1;

[0062] Determine that the boom 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 at the auxiliary latch position coincides with the fifth hinge point 12.

[0063] 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 .

[0064] When the boom structure 1 is raised to a preset disengagement angle, there is no need for the auxiliary cylinder 4 to assist in raising the boom, and it can be determined that the auxiliary 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 cylinder 4 is hinged to the suspension mechanism 6. The suspension mechanism 6 can drive the auxiliary cylinder 4 to move downward to an avoidance position, so that an avoidance gap is formed between the auxiliary cylinder 4 in the avoidance position and the boom structure 1, so as to avoid the auxiliary cylinder 4 interfering with other components, and the auxiliary cylinder 4 is suspended below the basic arm through the suspension mechanism 6.

[0065] After the boom structure 1 has completed the luffing operation, the luffing cylinder 3 can drive the boom structure 1 to recover and return to its original position. When the boom structure 1 returns to the preset latch position, the controller can send a return signal to the suspension mechanism 6 to make the suspension mechanism 6 drive 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 latching condition. The controller can send a latching signal to the pin driving component. 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 latching, 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.

[0066] like Figure 6 and Figure 7As shown, the suspension mechanism 6 includes a telescopic component 61 and a folding component 62. The telescopic component 61 has one end hinged to the sixth hinge point 13; the folding component 62 has one end hinged to the cylinder body of the auxiliary oil cylinder 4, and the other end of the telescopic component 61 is hinged to the other end of the folding component 62. The controller is electrically connected to the telescopic component 61, and the controller is electrically connected to the telescopic component 61. The controller is used to control the telescopic movement of the telescopic component 61. The suspension mechanism 6 in this embodiment may include the telescopic component 61 located at the upper end and the folding component 62 hinged to the telescopic component 61. The telescopic component 61 can perform telescopic movement along its own length direction. During the rotation of the boom structure 1, the folding component 62 can be folded or unfolded along its own length direction under the action of the auxiliary oil cylinder 4. The controller is electrically connected to the telescopic component 61, and the telescopic component 61 can adopt an oil cylinder structure or other drive form structure.

[0067] The controller sends a folding signal to the telescopic component 61, and the telescopic component 61 can be extended along its own length direction to lengthen the telescopic component 61 for autonomous avoidance. When the angle of the boom structure 1 continues to increase, the folding component 62 can be unfolded under the gravity of the auxiliary cylinder 4 in the folded state, so that the auxiliary 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 to shorten the telescopic component 61 and shorten the distance between the boom structure 1 and the auxiliary 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 to further pull the distance between the auxiliary cylinder 4 and the boom structure 1. In this embodiment, a telescopic component 61 is set at the upper end of the suspension mechanism 6, and a folding component 62 is set 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 auxiliary cylinder 4 interfering with other components.

[0068] 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 telescope 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 6As 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 two adjacent folding pull plates 621 are connected by a folding waist hole 622. Figure 7 As shown, in one embodiment, there are two folding pull plates 621, one of which is provided with a folding waist hole 622, and the two folding pull plates 621 are connected by a pin structure, which can slide along the folding waist hole 622 to make the two folding pull plates 621 fold or unfold relative to each other. The folding pull plates 621 in this embodiment are flat plate structures, which are simple in structure and easy to connect. In other embodiments, the number of folding pull plates 621 can be set according to actual use requirements, and the present invention is not limited thereto.

[0069] 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;

[0070] The controller is further configured as:

[0071] 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.

[0072] Specifically, the angle detection assembly may include at least two angle sensors 7, and the cylinder bodies of the luffing cylinder 3 and the auxiliary cylinder 4 may be provided with angle sensors 7. The pressure detection assembly may include at least two pressure sensors 8, and the cylinder bodies of the luffing cylinder 3 and the auxiliary cylinder 4 may be provided with pressure sensors 8. An angle sensor 7 electrically connected to the controller may also be provided on the boom structure 1, so as to monitor the boom angle of the boom structure 1.

[0073] 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.

[0074] 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 synchronously adjusted to ensure the stability, safety and reliability of the operation.

[0075] 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;

[0076] The controller is further configured as:

[0077] 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.

[0078] The distance detection member in this embodiment can be a distance sensor 9, and the number of distance sensors 9 can be multiple, and the distance sensor 9 is arranged at the end of the piston rod of the auxiliary oil cylinder 4 away from the turntable 2. The distance sensor 9 in this embodiment is arranged close to the pin hole of the auxiliary oil cylinder 4, which can improve the detection accuracy of the distance sensor 9. In this embodiment, with the cooperation of the angle sensor 7, the pressure sensor 8 and the distance sensor 9, the controller can complete the precise automatic separation and installation of the auxiliary oil cylinder 4 and the basic arm by controlling the suspension mechanism 6 and the loading and unloading pin mechanism. The whole process is automatically controlled, avoiding manual disassembly and assembly for each operation, and improving the operation efficiency.

[0079] The controller can determine whether the auxiliary cylinder 4 is in a disengaged condition by combining the current armature angles of the armature cylinder 3 and the auxiliary cylinder 4, the current pressures of the armature cylinder 3 and the auxiliary cylinder 4, and the latch distance to determine whether the three simultaneously satisfy the disengagement conditions. By combining the three conditions, accidental disengagement can be avoided, thereby improving operation safety. The controller can determine whether the auxiliary cylinder 4 is in a latching condition by combining the current armature angles of the armature cylinder 3 and the auxiliary cylinder 4, the current pressures of the armature cylinder 3 and the auxiliary cylinder 4, and the latch distance to determine whether the three simultaneously satisfy the latching conditions. Accidental latching can be avoided, thereby further improving operation safety.

[0080] like Figure 4 As shown, in one embodiment, auxiliary oil cylinders 4 are provided on both sides of the boom structure 1 along the vehicle width direction; and the fifth hinge point 12 is located at the lower side of the boom structure 1. The variable-length oil cylinders 3 in this embodiment are symmetrically arranged one on each side of the basic arm, and the auxiliary support 15 is arranged directly below the basic arm. In other embodiments, the number and position of the variable-length oil cylinders 14 and the auxiliary oil cylinders 4 can be adjusted according to the arrangement of the variable-length oil cylinders 3, the thrust requirements of the boom and the working capacity of the oil cylinders, as well as the structural characteristics of the turntable 2 and the basic arm.

[0081] In one embodiment, one luffing cylinder 3 is arranged directly below the basic arm, and the auxiliary cylinder 4 can be arranged directly below the basic arm; in another embodiment, one luffing cylinder 3 is arranged directly below the basic arm, and two auxiliary cylinders 4 are symmetrically arranged on both sides of the basic arm; in yet another embodiment, one luffing cylinder 3 is arranged directly below the basic arm, and two auxiliary cylinders 4 are symmetrically arranged on both sides of the basic arm, and one auxiliary cylinder 4 is also arranged directly below the basic arm. The number of the luffing cylinders 3 and the number of the auxiliary cylinders 4 in the present invention can be adjusted according to demand.

[0082] 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 direction of the boom structure 1. Among them, the fifth hinge point 12 can be located between the sixth hinge point 13 and the third hinge point 11 along the arm length direction of the basic arm. In this embodiment, the boom cylinder 3 and the auxiliary cylinder 4 are both hinged to the rear end of the turntable 2, and 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 arranged at intervals along the front and back, and the installation point of the auxiliary cylinder 4 is located at the rear side of the boom cylinder 3, which can ensure the boom 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 in the up and down directions, so that the boom cylinder 3 and the auxiliary cylinder 4 are located below the basic arm, and the installation space between the turntable 2 and the basic arm can be fully utilized. 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 and ensure the auxiliary arm lifting of the auxiliary cylinder 4.

[0083] The present invention also proposes an engineering machine 100, which includes a chassis 110 and a boom device as described above, and the specific structure of the boom device refers to the above embodiment. The turntable 2 is installed on the upper side of the chassis 110, and a plurality of running wheels are arranged on the lower side of the chassis 110. Since the engineering machine 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. In one embodiment, the engineering vehicle can be applied to a crane.

[0084] 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 an 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.

[0085] like Figure 2As 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 boom cylinder 3. Combined with the data detected by the pressure sensor 8 and the angle sensor 7, the controller determines that the boom cylinder 3 can independently complete the remaining boom adjustment work, and the controller can control the auxiliary cylinder 4 to separate from the boom structure 1.

[0086] 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 has raised the arm to the preset pin-off angle, and the controller controls the pin drive member 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.

[0087] After the boom structure 1 completes the arm raising work and starts to recover, the controller determines that the variable-length oil cylinder 3 and the boom structure 1 have returned to the separation position of the auxiliary oil cylinder 4 by combining the signals detected by the angle sensor 7, the pressure sensor 8 and the distance sensor 9. The controller can control the suspension mechanism 6 to automatically adjust the pin hole position of the auxiliary oil cylinder 4 so that the pin hole of the auxiliary oil cylinder 4 coincides with the pin hole of the auxiliary support 15; when the signal of the distance sensor 9 shows that the pin hole of the auxiliary oil cylinder 4 coincides with the pin hole of the auxiliary support 15, the controller issues a command to control the pin drive member to automatically insert the pin, and the auxiliary oil cylinder 4 is reconnected with the auxiliary support 15. Then, under the monitoring of the angle sensor 7 and the pressure sensor 8, the controller controls the auxiliary oil cylinder 4 and the variable-length oil cylinder 3 to complete the recovery of the boom structure 1. After the boom structure 1 is recovered, the controller can control the suspension mechanism 6 to shrink so that the suspension mechanism 6 is automatically folded under the basic arm to avoid interference between the suspension mechanism 6 and other components.

[0088] 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 as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0089] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A boom device, characterized in that: The arm device comprises: A boom 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) has a first end hinged to a fourth hinge point (23) of the turntable (2), and a second end hinged to a fifth hinge point (12) of the boom structure (1); the boom 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).

2. The boom device according to claim 1, characterized in that: The arm device also includes: The loading and unloading pin mechanism comprises a power pin (5) and a pin driving member connected to the power pin (5); the auxiliary oil cylinder (4) is hinged to the fifth hinge point (12) through the power pin (5); 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 make the power pin (5) detach from or hinge to the boom structure (1).

3. The boom device according to claim 2, characterized in that: The arm device also includes a controller electrically connected to the pin drive member, 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 opposite direction until the power pin (5) is detached from the boom structure (1); Determine that the auxiliary oil cylinder (4) is in a pinning condition, and control the pin driving member to move in a positive direction until the power pin (5) is hinged to the boom structure (1).

4. The arm device according to claim 2, characterized in that: The arm 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 arm structure (1), and the suspension mechanism (6) is used to drive the auxiliary oil cylinder (4) to move away from or closer to the arm structure (1) in the up and down direction.

5. The arm device according to claim 4, characterized in that: The suspension mechanism (6) is electrically connected to a controller, and the controller is further configured as follows: 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) at the auxiliary latch position coincides with the fifth hinge point (12).

6. The arm device according to claim 5, characterized in that: The suspension mechanism (6) comprises: A telescopic component (61), one end of which is 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), 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 electrically connected to the telescopic assembly (61). The controller is used to control the telescopic movement of the telescopic assembly (61).

7. The arm device according to claim 6, characterized in that: The telescopic assembly (61) comprises a connecting outer plate (611) and a telescopic inner rod (612) sleeved inside 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 boom 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).

8. The boom device according to any one of claims 3 to 7, 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 luffing cylinder (3) and the auxiliary 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 luffing oil cylinder (3) and the auxiliary oil cylinder (4) are controlled according to the current luffing angle, so that the luffing oil cylinder (3) and the auxiliary oil cylinder (4) are luffed at the same angle.

9. The boom device according to claim 8, characterized in that: The arm device also includes a distance detection member electrically connected to the controller, the distance detection member being used to detect a 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 change angle, the current pressure and the latch distance.

10. The boom device according to any one of claims 1 to 7, characterized in that: The auxiliary oil cylinders (4) are arranged 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).

11. The boom device according to any one of claims 1 to 7, 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).

12. An engineering machine (100), characterized in that: The engineering machinery (100) comprises the boom device according to any one of claims 1 to 11.

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