Landing leg stabilizing device, landing leg system and engineering machinery

Abstract

The invention provides a supporting leg stabilizing device, a supporting leg system and engineering machinery. The supporting leg stabilizing device comprises a supporting leg box, a supporting leg support and a supporting leg support, the supporting leg mechanism comprises a first supporting leg arm, a second supporting leg arm, a rotary driving part and a telescopic driving part, one end of the first supporting leg arm is hinged to a first hinge point of the supporting leg box, the first supporting leg arm is a hollow cylinder, the second supporting leg arm is arranged in the first supporting leg arm in a penetrating mode and is in sliding connection with the first supporting leg arm, and the second supporting leg arm is in sliding connection with the second supporting leg arm. The rotation driving part is used for driving the first supporting leg arm to rotate around the first hinge point between the unfolding position and the folding position in a reciprocating mode, and the telescopic driving part is used for driving the second supporting leg arm to stretch out and draw back relative to the first supporting leg arm. According to the landing leg stabilizing device, the first landing leg arm is hinged to the landing leg box, the second landing leg arm is telescopically connected with the first landing leg arm, the first landing leg arm and the second landing leg arm are driven by independent driving parts, it is ensured that the unfolding span is large, meanwhile, the landing leg storage space can be saved, and the landing leg stabilizing device is suitable for more use scenes.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery technology, and particularly relates to a leg stabilization device, a leg system, and engineering machinery. Background Technology

[0002] Aerial work platforms, forklifts (such as telescopic boom forklifts), and excavators, among other construction machinery, typically require outrigger stabilizers for stability. There are two traditional types of outrigger stabilizers. The first uses a single-arm outrigger structure, where the single arm hangs vertically when retracted and extends horizontally when deployed. The second uses a multi-stage telescopic outrigger, where the outrigger deployment is controlled by telescopic movement; after the outrigger touches the ground, an additional lifting structure is needed to lift the vehicle.

[0003] Among these issues, the single-arm support leg structure is relatively short, has a small span when deployed, and lacks stability, affecting the safety of high-altitude operations. When retracted, the single-arm support leg hangs vertically, and the outrigger stabilizer extends into the turntable's working area, hindering the turntable's rotation. Multi-stage telescopic support legs, when retracted, are long and occupy space in the width direction. Furthermore, deploying the additional lifting structure requires the use of two or more drive components, resulting in long deployment times and high energy consumption. Moreover, existing outrigger stabilizer deployment and telescopic control strategies are relatively simple, often requiring manual adjustments during use, and are not adaptable to increasingly complex application scenarios. Summary of the Invention

[0004] The main objective of this invention is to propose a leg stabilizing device, a leg system, and engineering machinery, aiming to solve the technical problems of existing leg stabilizing devices having a small deployment span, large retraction space occupation, and limited application scenarios.

[0005] To achieve the above objectives, the present invention provides a leg stabilizing device, comprising: a leg housing; and a leg mechanism including a first leg arm, a second leg arm, a rotary drive, and a telescopic drive. One end of the first leg arm is hinged to a first hinge point of the leg housing. The first leg arm is a hollow cylinder. The second leg arm passes through the first leg arm and is slidably connected to it. The rotary drive is used to drive the first leg arm to reciprocate between an unfolded position and a folded position around the first hinge point. The telescopic drive is used to drive the second leg arm to extend or retract relative to the first leg arm.

[0006] In this embodiment of the invention, the two arms of the support leg are hollow cylinders, one end of the telescopic drive member is accommodated in and connected to the one arm of the support leg, and the other end is accommodated in and connected to the two arms of the support leg.

[0007] In this embodiment of the invention, the first arm of the support leg and the second arm of the support leg form an installation space, and the telescopic drive member can extend and retract between the initial position and the maximum stroke position. The telescopic drive member located at the initial position and the maximum stroke position is accommodated within the installation space.

[0008] In this embodiment of the invention, one end of the rotary drive is hinged to the leg box, and the other end is hinged to the second hinge point of the leg arm. The two ends of the leg arm along the arm length direction are a rotating end and a free end, respectively. The rotating end is hinged to the first hinge point, and the second hinge point is located between the rotating end and the free end.

[0009] In this embodiment of the invention, the outer wall of the two arms of the support leg is provided with a plurality of flexible sliders, which are used to slide and engage with one arm of the support leg.

[0010] In this embodiment of the invention, the rotary drive component is a drive cylinder; and / or, the telescopic drive component is a drive cylinder.

[0011] In this embodiment of the invention, the support leg box has a symmetrical box-shaped structure, and the support leg mechanism is provided on both sides of the support leg box. The two support leg mechanisms are symmetrically arranged on both sides of the support leg box.

[0012] In this embodiment of the invention, the outrigger mechanism further includes a support foot, which is hinged to one end of the two outrigger arms away from the one outrigger arm, and the support foot is provided with a support plane for supporting the ground.

[0013] The present invention also proposes an outrigger system, the outrigger system comprising a controller and an outrigger stabilizing device as described above, wherein the rotation drive and the telescopic drive are both electrically connected to the controller, and the controller is configured to: Obtain outrigger control commands; Upon receiving a support leg control command, the rotation drive is controlled according to the support leg control command to drive one arm of the support leg to rotate relative to the support leg box. Obtain the current angle of one arm of the outrigger; Based on the current angle, the telescopic drive can be turned off or controlled to perform telescopic drive.

[0014] The present invention also proposes an engineering machine, which includes a body and a support leg system as described above, wherein the support leg stabilizing device is mounted on the body.

[0015] Through the above technical solution, the outrigger stabilization device provided in the embodiments of the present invention has the following beneficial effects: When the outriggers need to be deployed, the rotary drive mechanism rotates one outrigger arm downwards relative to the outrigger housing until it reaches its maximum angle. The rotary drive then stops, and the outrigger extension drive mechanism extends the other two outrigger arms relative to the first outrigger arm, causing their bottoms to touch the ground and lifting the machinery. Once the extension drive mechanism reaches its maximum travel, the outrigger mechanism extends to its longest distance, raising the machinery to its highest point. When the outriggers need to be folded, the extension drive mechanism retracts the other two outrigger arms to their initial position, and the rotary drive mechanism rotates one outrigger arm upwards relative to the outrigger housing, returning the outrigger mechanism to its initial position. In the folded state, the second arm of the outrigger at least partially overlaps with the first arm, and the overall height of the outrigger stabilizing device can be approximately equal to the length of the first arm. This reduces the vertical space occupied by the outrigger after retraction, avoids interference with other components, and allows for flexible operation of the device when the outrigger is not deployed. The outrigger box is hinged to the first arm, and the first arm is slidably connected to the second arm, achieving maximum extension distance and compact storage. Furthermore, the deployment of the first arm and the extension / retraction of the second arm are driven by independent drive components, allowing for more flexible deployment and extension control strategies and adaptability to a wider range of application scenarios. The outrigger stabilizing device in this invention uses a hinged connection between the first arm and the outrigger box, with the second arm and the first arm being retractably connected. The independent drive components for the first and second arms ensure a large deployment span while saving storage space and adapting to more usage scenarios.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the outrigger stabilization device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the angle analysis of the outrigger stabilization device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the angle analysis of the outrigger stabilization device according to another embodiment of the present invention; Figure 4 This is a schematic diagram of the angle analysis of the outrigger stabilization device according to another embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] The outrigger stabilization device according to the present invention is described below with reference to the accompanying drawings.

[0021] like Figures 1 to 4 As shown, in an embodiment of the present invention, the outrigger stabilizing device 100 includes an outrigger box 1 and an outrigger mechanism 2. The outrigger mechanism 2 includes an outrigger arm 21, an outrigger arm 22, a rotary drive 23, and a telescopic drive 24. One end of the outrigger arm 21 is hinged to the first hinge point 11 of the outrigger box 1. The outrigger arm 21 is a hollow cylinder. The outrigger arm 22 passes through the outrigger arm 21 and is slidably connected to the outrigger arm 21. The rotary drive 23 is used to drive the outrigger arm 21 to reciprocate between the unfolded position and the folded position around the first hinge point 11. The telescopic drive 24 is used to drive the outrigger arm 22 to extend and retract relative to the outrigger arm 21.

[0022] Understandably, in this embodiment, the outrigger stabilization device 100 is mainly used for aerial work platforms, forklifts (such as rotary telescopic boom forklifts), or excavators and other construction machinery. The outrigger box 1 can be installed on the bottom of the construction machinery's body 200. In one embodiment, the outrigger box 1 has a symmetrical box-shaped structure, with a main body 12 in the middle. Inverted V-shaped side branches 13 extend from the left and right sides of the main body 12. The width of the outrigger box 1 can be... Figure 1 The left-right direction can also be the width direction of the construction machinery. Outrigger mechanisms 2 are installed on both branches 13 of the outrigger box 1. Specifically, the first outrigger arm 21 can be hinged to the branch 13 via a pin, and the second outrigger arm 22 can slide and engage with the first outrigger arm 21 via flexible sliders 221. Multiple sets of sliding contact groups are provided at the end of the second outrigger arm 22 near the outrigger box 1, arranged sequentially along the arm length direction of the second outrigger arm 22. Each sliding contact group includes multiple flexible sliders 221, which are spaced apart along the outer periphery of the second outrigger arm 22. The flexible sliders 221 can be made of flexible material; in one embodiment, the flexible sliders 221 are made of rubber or nylon. It should be noted that the length ratio of the first outrigger arm 21 to the second outrigger arm 22 can be adjusted according to the needs of different vehicle models (e.g., the length of the second outrigger arm 22 ≥ the length of the first outrigger arm 21) to adapt to different vehicle model requirements.

[0023] In one embodiment, both the rotary drive component 23 and the telescopic drive component 24 can be driven by hydraulic cylinders. In another embodiment, the rotary drive component 23 and the telescopic drive component 24 can be driven by electric push rods or pneumatic drive devices. The use of hydraulic cylinders for both the rotary drive component 23 and the telescopic drive component 24 provides higher rigidity and stability. The cylinder itself is a rigid structure, and when extended, it acts like a solid support pillar. When the outrigger mechanism 2 bears a huge load, the cylinder hardly undergoes elastic deformation, providing an extremely stable support foundation for the equipment. This is crucial for the accuracy and safety of lifting operations. In contrast, a flexible traction structure will exhibit some elastic elongation under heavy loads. Even with a locking device installed, the rigidity of the entire support system is far less than that of a hydraulic cylinder, which may cause slight sinking or swaying of the equipment under heavy loads.

[0024] Furthermore, it offers enhanced safety, as the hydraulic system supplying oil to the rotary drive component 23 and the telescopic drive component 24 is self-locking. By incorporating a hydraulic lock (typically composed of a hydraulically controlled check valve) in the oil circuit, even if an oil pipe ruptures, the cylinder can firmly lock the piston rod in its current position, preventing the outrigger mechanism 2 from retracting unexpectedly, resulting in an extremely high safety factor. Existing structures may be susceptible to wear and malfunction, and if a mechanical component breaks, the outrigger mechanism 2 will instantly lose support, causing a catastrophic accident. Additionally, the rotary drive component 23 and the telescopic drive component 24 offer high control precision and adjustable logic. Each outrigger is driven by an independent cylinder, allowing for precise synchronization or individual control via a hydraulic circuit (e.g., using a synchronizing valve) or an electronic control system. Operators can easily fine-tune the extension length and height of each outrigger, and the four support points of the vehicle can form various irregular quadrilaterals, making it suitable for more complex scenarios and uneven terrain. The rotary drive component 23 and the telescopic drive component 24 utilize drive cylinders; the main wear parts during operation are the sealing rings, which have a long lifespan under normal use and regular hydraulic oil changes. The entire system is enclosed in oil, making it less susceptible to external contamination and corrosion, thus giving the outrigger stabilizer 100 a longer service life and lower maintenance costs.

[0025] When the outrigger stabilization device 100 needs to extend the outriggers, the rotation drive 23 drives the first outrigger arm 21 to rotate downwards relative to the outrigger housing 1 until the first outrigger arm 21 rotates to its maximum angle. The rotation drive 23 then stops, and the outrigger extension drive 24 drives the second outrigger arm 22 to extend relative to the first outrigger arm 21, causing the bottom of the second outrigger arm 22 to touch the ground and lift the construction machinery. After the extension drive 24 reaches its maximum travel, the outrigger mechanism 2 extends to its longest distance, at which point the construction machinery is lifted to its highest point. When the outrigger stabilization device 100 needs to fold the outriggers, the extension drive 24 drives the second outrigger arm 22 to retract to its initial position, and the rotation drive 23 drives the first outrigger arm 21 to rotate upwards relative to the outrigger housing 1, causing the outrigger mechanism 2 to retract to its initial position. When the outrigger mechanism 2 is in the folded state, the second outrigger arm 22 at least partially overlaps with the first arm. The overall height of the outrigger stabilizing device can be approximately equal to the length of the first arm, reducing the vertical space occupied after the outrigger is retracted and avoiding interference with other components. This allows the device to operate flexibly even when the outrigger is not extended. The outrigger box 1 is hinged to the first outrigger arm 21, and the first outrigger arm 21 is slidably connected to the second outrigger arm 22, achieving maximum extension distance and compact storage. Furthermore, the extension of the first outrigger arm 21 and the extension / retraction of the second outrigger arm 22 are driven by independent drive components, allowing for more flexible extension and retraction control strategies and adaptability to more application scenarios. In this embodiment, the outrigger stabilizing device 100 is hinged to the outrigger box 1 via the first outrigger arm 21, and the second outrigger arm 22 is retractably connected to the first outrigger arm 21. The first outrigger arm 21 and the second outrigger arm 22 are driven by independent drive components, ensuring a large extension span while saving outrigger storage space and adapting to more usage scenarios.

[0026] In one embodiment, the second outrigger arm 22 is a hollow cylinder. One end of the telescopic drive component 24 is housed within and connected to the first outrigger arm 21, and the other end is housed within and connected to the second outrigger arm 22. In this embodiment, both the first outrigger arm 21 and the second outrigger arm 22 adopt a hollow cylinder structure. Combined with the rotary drive component 23 and the telescopic drive component 24, this results in a compact structure with minimal space occupation. The outrigger housing 1 can be equipped with storage space. The rotary drive component 23 can be cleverly integrated inside the outrigger housing 1, and the telescopic drive component 24 can be integrated within the second outrigger arm 22. The structure is very compact, does not occupy additional space, and makes the overall layout of the equipment neater and more rational. Existing mechanical connection structures require a certain amount of layout space, are relatively complex and bulky, and may affect the overall structural design of the vehicle.

[0027] It should be noted that the first outrigger arm 21 and the second outrigger arm 22 enclose the installation space. The telescopic drive component 24 can extend and retract between the initial position and the maximum stroke position. Both the initial position and the maximum stroke position of the telescopic drive component 24 are accommodated within the installation space. Outrigger mechanisms 2 are installed on both the left and right sides of the outrigger box 1. The outrigger mechanism 2 on the left side of the outrigger box 1 is in a folded state, and the outrigger mechanism 2 on the right side of the outrigger box 1 is in an unfolded state. The telescopic drive component 24 is accommodated within the installation space during the movement of the outrigger mechanism 2 and in all states. This protects the telescopic drive component 24 and prevents external components from interfering with it, making the outrigger stabilizing device 100 operate more stably.

[0028] like Figures 1 to 4 As shown, one end of the rotary drive component 23 is hinged to the outrigger housing 1, and the other end is hinged to the second hinge point 211 of the outrigger arm 21. The outrigger arm 21 has a rotating end and a free end along its length, respectively. The rotating end is hinged to the first hinge point 11, and the second hinge point 211 is located between the rotating end and the free end. In this embodiment, the second hinge point 211 is located between the first hinge point 11 and the free end of the outrigger arm 21, thus avoiding interference between the rotary drive component 23 and other components. When the telescopic drive component 24 uses a hydraulic cylinder, the piston rod of the telescopic drive component 24 can be installed at the first mounting point of the outrigger arm 21. The first mounting point is located horizontally between the first hinge point 11 and the second hinge point 211, thus avoiding interference between the movement of the outrigger arm 21 and the outrigger arm 22. The cylinder of the telescopic drive component 24 extends into the outrigger arm 22 and connects to the inner wall of the outrigger arm 22.

[0029] like Figure 1 As shown, the outrigger box 1 has a symmetrical box-shaped structure, and outrigger mechanisms 2 are provided on both sides of the outrigger box 1. The two outrigger mechanisms 2 are symmetrically arranged on both sides of the outrigger box 1. The two outrigger mechanisms 2 are located at both ends of the outrigger box 1 along the width direction (i.e., the left-right direction), which can ensure that the outrigger stabilizing device 100 has a large span when the two outrigger mechanisms 2 are deployed.

[0030] In this embodiment of the invention, the outrigger mechanism 2 further includes a support foot 25, which is hinged to one end of the outrigger arm 22 away from the outrigger arm 21. The support foot 25 is provided with a support plane for supporting the ground. The support foot 25 can adopt a triangular support structure, and the top of the support foot 25 can be hinged to the bottom of the outrigger arm 22 via a pin. When the support foot 25 touches the ground, it automatically rotates to a horizontal position to adapt to sloping terrain. The adaptive design of the support foot 25 enables automatic leveling, allowing the outrigger stabilization device 100 to adapt to complex terrain.

[0031] The present invention also proposes an outrigger system, which includes a controller and the outrigger stabilizing device 100 as described above. The rotation drive component 23 and the telescopic drive component 24 are both electrically connected to the controller, which is configured as follows: Obtain outrigger control commands; Upon receiving the outrigger control command, the rotation drive 23 is controlled according to the outrigger control command to drive the outrigger arm 21 to rotate relative to the outrigger box 1. Get the current angle of the outrigger arm 21; Depending on the current angle, shut down or control the telescopic drive to extend or retract.

[0032] The outrigger control command includes either outrigger extension or outrigger folding. When the outrigger control command includes outrigger extension, the controller can control the rotary drive 23 to drive the outrigger arm 21 to rotate downward relative to the outrigger box 1. The extension and retraction control of the outrigger arm 22 can be adjusted according to the current angle of the outrigger arm 21 by adjusting the extension and retraction drive 24. When the outrigger control command includes outrigger folding, the controller can control the rotary drive 23 to drive the outrigger arm 21 to rotate upward relative to the outrigger box 1. The extension and retraction control of the outrigger arm 22 can be adjusted according to the current angle of the outrigger arm 21 by adjusting the extension and retraction drive 24. This achieves dynamic linkage control of the two arms, which can prevent safety accidents caused by the outrigger arm 22 extending or retracting when the current state of the outrigger arm 21 is not suitable for the extension and retraction of the outrigger arm 22.

[0033] In one embodiment, the avoidance angle range, the drive angle range, and the current angle of the outrigger arm 21 are obtained; if the current angle is determined to be within the avoidance angle range, the telescopic drive member 24 is shut down; if the current angle is determined to be within the drive angle range, the telescopic drive member 24 is controlled to perform telescopic drive according to the current angle.

[0034] The controller is configured to acquire the avoidance angle range and the drive angle range, including: Obtain the minimum and maximum unfolding angles; The avoidance angle range is defined as either less than the minimum deployment angle or greater than or equal to the maximum deployment angle. The driving angle range is defined as being greater than or equal to the minimum deployment angle and less than the maximum deployment angle.

[0035] Specifically, a vehicle body 200 is provided on the top of the outrigger box 1, an outrigger arm 21 is hinged to a first hinge point 11 of the outrigger box 1, a rotary drive 23 is hinged to a second hinge point 211 of the outrigger arm 21, and the edge of the vehicle body 200 protrudes from the first hinge point 11 along the vehicle width direction. The controller is configured to obtain the minimum deployment angle, including: Obtain the critical interference angle between the outrigger mechanism 2 and the vehicle body 200 when the telescopic drive component 24 is at its maximum extension stroke; The critical interference angle is determined to be the minimum unfolding angle.

[0036] Furthermore, such as Figures 2 to 4 As shown, the critical interference angle between the outrigger mechanism 2 and the vehicle body 200 is calculated according to the following formula: a_min=arctan[(D_e+D_z / cos(a_min)) / H_e]; in, a_min is the critical interference angle; D_e is the horizontal distance between the first hinge point 11 and the outer edge of the vehicle body 200; H_e is the vertical distance between the first hinge point 11 and the outer edge of the vehicle body 200; D_z represents the critical width between the first hinge point 11 and the lower edge of the vehicle body 200 when the outrigger arm 22 is in its maximum extension state and the outrigger mechanism 2 and the vehicle body 200 are in a critical interference state. Figure 3 As shown, when the rotary drive 23 is at its maximum extension stroke, D_z is the distance between the first hinge point 11 and the lower edge of the vehicle body 200.

[0037] The maximum unfolding angle is a preset angle; in one embodiment, the maximum unfolding angle is 90°~110°. The controller is configured to control the telescopic drive 24 to perform telescopic drive according to the current angle, including: Calculate the extension speed and extension length of the telescopic drive component 24 based on the current angle; The telescopic drive component 24 is controlled to perform telescopic movement based on the telescopic speed and telescopic length, so that the current angle is within the driving angle range, and the telescopic drive component 24 completes the telescopic movement.

[0038] The telescopic stroke of the telescopic drive component 24 is calculated using the following formula: L_e=L*[sin(θ)-sin(a_min)] / [1-sin(a_min)]; in, L_e represents the telescopic stroke; L is the maximum extended length of the two outrigger arms 22; θ is the current angle, and a_min is the minimum unfolding angle.

[0039] The extension and retraction speed of the telescopic drive component 24 is calculated using the following formula: v_e=L*cos(θ) / [1-sin(a_min)]; in, v_e is the scaling speed; L is the maximum extended length of the two outrigger arms 22; θ is the current angle; a_min is the minimum unfolding angle.

[0040] It can ensure that the telescopic drive component 24 drives the second arm 22 of the outrigger into position before the rotation drive component 23 drives the first arm 21 of the outrigger to rotate to the avoidance angle range, thus avoiding the second arm 22 of the outrigger from interfering with other components.

[0041] A is the hinge point between the rotary drive 23 and the outrigger box 1, C is the second hinge point 211, and the distance between hinge points A and C is the actual length LR of the rotary drive 23; B is the first hinge point 11, AB and BC are fixed distances; θ_p is the angle between AB and BC, and the initial value of θ_p is θ_i when the outrigger mechanism 2 is fully retracted.

[0042] θ = θ_p - θ_i; θ_p=ARCCOS(AB^2+BC^2–2*LR) θ_i=ARCCOS(AB^2+BC^2–2*L_i) Where LR=Le1+L_i, L_e1 is the actual cylinder stroke of the rotary drive 23, and L_i is the cylinder length AC when the stroke of the rotary drive 23 is zero.

[0043] θ = ARCCOS(AB^2 + BC^2 – 2*Le1 - 2*L_i) - ARCCOS(AB^2 + BC^2 – 2*L_i); it can be verified that when Le1 = 0, θ = 0, that is, the deployment angle of the outrigger arm 21 is controlled by the relative positions of hinge points A, B, and C and the stroke of the hydraulic cylinder. Le1(θ) = {(AB^2 + BC^2 - 2L_i)(1 – cos(θ)) + sqrt{1 - (AB^2 + BC^2 - 2L_i)^2}sin(θ)} / 2 The cylinder stroke of the rotary drive 23 is set to Le1, and the cylinder stroke of the telescopic drive 24 is set to Le2; The hydraulic cylinder strokes for the final three stages of outrigger deployment are as follows: θ <a_min:Le1=Le1(θ),Le2=0; a_min<θ <a_max: Le1=Le1(θ), Le2=f(θ)=L*[sin(θ)-sin(a_min)] / [1-sin(a_min)] θ>a_max: Le1=Le1(θ), Le2=L.

[0044] Specifically, the rotation drive 23 is a drive cylinder, and the controller is configured to acquire the current angle of the outrigger arm 21, including: Obtain the current elongation of the rotary drive component 23, and obtain the current angle based on the current elongation.

[0045] This invention also proposes an engineering machinery, comprising a vehicle body 200 and the outrigger system described above. An outrigger stabilizing device 100 is mounted on the vehicle body 200, and the specific structure of the outrigger stabilizing device 100 is as described in the above embodiments. Since the engineering machinery adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. In one embodiment, the engineering machinery can be applied to aerial work platforms, forklifts (such as rotary telescopic boom forklifts), or excavators, etc.

[0046] Specifically, the construction machinery includes two outrigger stabilizing devices 100, which are installed along the length of the vehicle body 200. When the construction machinery needs support, the two outrigger stabilizing devices 100 are deployed together, increasing the support span of the outrigger stabilizing devices 100. After the two-section boom outriggers are deployed, a wider support quadrilateral is formed (the area is increased by about 30%), which significantly enhances stability.

[0047] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A leg stabilizing device, characterized in that, The outrigger stabilization device (100) includes: Support leg box (1); The outrigger mechanism (2) includes a first outrigger arm (21), a second outrigger arm (22), a rotary drive (23), and a telescopic drive (24). One end of the first outrigger arm (21) is hinged to the first hinge point (11) of the outrigger box (1). The first outrigger arm (21) is a hollow cylinder. The second outrigger arm (22) passes through the first outrigger arm (21) and is slidably connected to the first outrigger arm (21). The rotary drive (23) is used to drive the first outrigger arm (21) to reciprocate between the unfolded position and the folded position around the first hinge point (11). The telescopic drive (24) is used to drive the second outrigger arm (22) to extend and retract relative to the first outrigger arm (21).

2. The outrigger stabilizing device according to claim 1, characterized in that, The two arms of the outrigger (22) are hollow cylinders. One end of the telescopic drive (24) is housed in the first arm of the outrigger (21) and connected to the first arm of the outrigger (21), and the other end is housed in the second arm of the outrigger (22) and connected to the second arm of the outrigger (22).

3. The outrigger stabilizing device according to claim 2, characterized in that, The first arm (21) of the outrigger and the second arm (22) of the outrigger form an installation space. The telescopic drive (24) can extend and retract between the initial position and the maximum stroke position. The telescopic drive (24) located at the initial position and the maximum stroke position is accommodated within the installation space.

4. The outrigger stabilizing device according to any one of claims 1 to 3, characterized in that, One end of the rotary drive (23) is hinged to the leg box (1), and the other end is hinged to the second hinge point (211) of the leg arm (21). The two ends of the leg arm (21) along the arm length direction are the rotating end and the free end, respectively. The rotating end is hinged to the first hinge point (11), and the second hinge point (211) is located between the rotating end and the free end.

5. The outrigger stabilizing device according to any one of claims 1 to 3, characterized in that, The outer wall of the second arm (22) of the outrigger is provided with a plurality of flexible sliders (221), which are used to slide and contact with the first arm (21) of the outrigger.

6. The outrigger stabilizing device according to any one of claims 1 to 3, characterized in that, The rotary drive component (23) is a drive cylinder; And / or, The telescopic drive component (24) is a drive cylinder.

7. The outrigger stabilizing device according to any one of claims 1 to 3, characterized in that, The support leg box (1) has a symmetrical box-shaped structure, and the support leg mechanism (2) is provided on both sides of the support leg box (1). The two support leg mechanisms (2) are symmetrically arranged on both sides of the support leg box (1).

8. The outrigger stabilizing device according to any one of claims 1 to 3, characterized in that, The outrigger mechanism (2) also includes a support foot (25), which is hinged to one end of the outrigger arm (22) away from the outrigger arm (21). The support foot (25) is provided with a support plane for supporting the ground.

9. A leg support system, characterized in that, The outrigger system includes a controller and an outrigger stabilizing device (100) as described in any one of claims 1 to 8, wherein the rotation drive (23) and the telescopic drive (24) are both electrically connected to the controller, and the controller is configured to: Obtain outrigger control commands; Upon receiving a support leg control command, the rotation drive (23) is controlled to drive one arm (21) of the support leg to rotate relative to the support leg box (1) according to the support leg control command; Obtain the current angle of the outrigger arm (21); Based on the current angle, shut down or control the telescopic drive (24) to perform telescopic drive.

10. An engineering machinery, characterized in that, The construction machinery includes a vehicle body (200) and a leg system as described in claim 9, wherein the leg stabilizing device (100) is mounted on the vehicle body (200).

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