Outrigger structure, x-outrigger chassis, and aerial device

Abstract

The utility model relates to high altitude operation platform technical field discloses a kind of supporting leg structure, X type supporting leg chassis and aerial working device, comprising: supporting leg frame, with the steering axle of supporting leg frame hinged and actuating device, and actuating device is respectively hinged with supporting leg frame and steering axle;Wherein, actuating device has the locking state of making supporting leg frame and steering axle can be locked each other and the unlocking state of making supporting leg frame and steering axle can be relatively rotated each other. When actuating device is in unlocking state by above-mentioned technical scheme, actuating device can drive supporting leg frame and steering axle relatively rotate each other, to improve the passability of aerial working device of application this supporting leg structure and make the aerial working device have leveling function, to adapt to the construction condition of complex road condition;When actuating device is in locking state, make supporting leg frame and steering axle lock each other, to facilitate aerial working device to work.

Description

Technical Field

[0001] This utility model relates to the field of aerial work platform technology, specifically to a support leg structure. Based on this, the utility model also specifically relates to an X-shaped support leg chassis and an aerial work device. Background Technology

[0002] Aerial work platforms generally consist of a chassis and a loading mechanism. X-type outrigger chassis are a commonly used type of chassis; see [link to relevant documentation]. Figure 1 As shown, the X-type outrigger chassis has four outrigger frames 1, each hinged to the frame 19. These four outrigger frames 1 can rotate out from the hinge points of the frame 19 and radiate outwards in an X shape. The X-type outrigger structure allows for a larger outrigger span, improving operational stability. During operation, the load on the upper vehicle is quickly transferred to the outrigger frames 1 via pins, thereby reducing the stress on the frame 19 and decreasing its design cost and weight. Currently, due to the significant increase in working height in the aerial work platform industry, the X-type outrigger chassis is widely used in high-altitude work platforms.

[0003] Currently, in X-type outrigger chassis, the outrigger frame 1 and steering axle 15 are essentially connected as a rigid structure. This causes the aerial work platform to tilt when crossing obstacles or passing through low-lying areas, resulting in the wheels 20 being suspended in the air, thus posing a safety hazard to the operator. When the aerial work platform is on complex road conditions, such as when there are obstacles on the road, the gap between the aerial work platform and the ground cannot be adjusted, limiting the platform's obstacle-crossing ability. When the aerial work platform passes through low working areas, its folded height cannot be lowered, further affecting its passability. In addition, aerial work platforms with a rigid structure connecting the outrigger frame 1 and steering axle 15 lack leveling capabilities, which can easily restrict boom lifting on sloping roads, affecting normal operation. Utility Model Content

[0004] The purpose of this invention is to overcome the technical problems of poor passability and lack of leveling function of existing aerial work platforms, and to provide a support leg structure in which the support leg frame is hinged to the steering axle. The support leg frame and the steering axle can rotate relative to each other through an actuation device, thereby improving the passability of the aerial work platform using this support leg structure, and at the same time enabling the aerial work platform to have a leveling function.

[0005] To achieve the above objectives, this utility model provides a leg structure, comprising: a leg frame; a steering axle, the steering axle being hinged to the leg frame; and an actuation device, the actuation device being hinged to both the leg frame and the steering axle; wherein the actuation device has a locked state that allows the leg frame and the steering axle to lock against each other and an unlocked state that allows the leg frame and the steering axle to rotate relative to each other.

[0006] In some embodiments, the actuation device is a hydraulic cylinder, with its two ends hinged to the outrigger and the steering axle, respectively.

[0007] In some embodiments, the cylinder includes a cylinder barrel hinged to the outrigger and a cylinder rod hinged to the steering axle.

[0008] In some embodiments, the outrigger structure includes a first hinge assembly for hinged connection between the actuation device and the outrigger frame, and a second hinge assembly for hinged connection between the actuation device and the steering axle; the first hinge assembly includes a first bushing connected to one end of the actuation device, a first mounting plate connected to the outrigger frame near the end of the actuation device, a first pin passing through the first mounting plate and the first bushing respectively, a first stop pin disposed on the side of the first mounting plate away from the first bushing and passing through the first pin, and a first fastener passing through the first stop pin and fixedly connected to the first mounting plate; the second hinge assembly includes a second bushing connected to the other end of the actuation device, a second mounting plate connected to the steering axle near the end of the actuation device, a second pin passing through the second mounting plate and the second bushing respectively, a second stop pin disposed on the side of the second mounting plate away from the second bushing and passing through the second pin, and a second fastener passing through the second stop pin and fixedly connected to the second mounting plate.

[0009] In some embodiments, the first hinge assembly includes a first bearing, a first stepped hole is provided inside the first bushing near the end of the first bushing, the first bearing is installed in the first stepped hole, and the first pin passes through the first bearing; the second hinge assembly includes a second bearing, a second stepped hole is provided inside the second bushing near the end of the second bushing, the second bearing is installed in the second stepped hole, and the second pin passes through the second bearing.

[0010] In some embodiments, the outrigger structure includes a third hinge assembly for hinged connection between the outrigger bracket and the steering axle. The third hinge assembly includes a third mounting plate connected to the end of the outrigger bracket near the steering axle, a third bushing connected to the end of the steering axle near the outrigger bracket, a third pin passing through the third mounting plate and the third bushing respectively, a third stop pin disposed on the side of the third mounting plate away from the third bushing and passing through the third pin, and a third fastener passing through the third stop pin and fixedly connected to the third mounting plate.

[0011] In some embodiments, the third hinge assembly includes a third bearing, and a third stepped hole is provided inside the third bushing and near the end of the third bushing, the third bearing is installed in the third stepped hole, and the third pin passes through the third bearing.

[0012] Based on this, the present invention also provides an X-type outrigger chassis, including a frame, wheels and the aforementioned outrigger structure, wherein the frame is hinged to four of the outrigger structures respectively, and the wheels are connected to the end of the steering axle away from the outrigger frame.

[0013] In addition, this utility model also provides an aerial work platform, which includes a loading mechanism and the aforementioned X-shaped outrigger chassis, wherein the loading mechanism is mounted on the X-shaped outrigger chassis.

[0014] In some embodiments, the aerial work platform includes a control unit, a first angle sensor mounted on the boom of the upper structure, and a second angle sensor mounted on the X-shaped outrigger chassis. The first angle sensor is used to monitor the deployment angle of the boom, and the second angle sensor is used to monitor the tilt angle between the X-shaped outrigger chassis and the ground. The operator can control the actuation device to keep the upper structure level based on the tilt angle between the X-shaped outrigger chassis and the ground.

[0015] Through the above technical solution, the outriggers and steering axle are hinged together, and the actuator is hinged to both the outriggers and steering axle. When the actuator is in the unlocked state, it can drive the outriggers and steering axle to rotate relative to each other; when the actuator is in the locked state, it prevents the outriggers and steering axle from rotating relative to each other, thus achieving locking. Therefore, the aerial work platform with the outrigger structure provided by this utility model, when the aerial work platform is in the retracted position and traveling on rough roads, the actuator is in the unlocked state, and the steering axle can rotate relative to the outriggers, allowing the steering axle to remain in contact with the road surface, preventing the wheels from hanging off the ground, and improving the off-road capability of the aerial work platform. When the aerial work platform is in the retracted position and the actuator is in the unlocked state, the relative rotation of the outriggers and steering axle can be driven by the actuator to adjust the chassis tilt angle of the aerial work platform, thereby enabling the chassis to have a leveling function. After the leveling operation is completed, the actuator is locked again, solving the problem of complex ground conditions restricting the boom lifting. In addition, the relative rotation of the outriggers and the steering axle can be driven by an actuator to adjust the gap between the chassis of the aerial work platform and the road surface. For example, by reducing the gap, the stowage height of the aerial work platform can be reduced, thus solving the problem of transportation restrictions on the aerial work platform; by increasing the gap, the passability of the aerial work platform through complex road surfaces can be improved.

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

[0017] Figure 1 This is a structural diagram of an existing X-type outrigger chassis; Figure 2 This is a schematic diagram of the support leg structure provided by this utility model; Figure 3 This is an exploded view of the support leg structure provided by this utility model; Figure 4 This is a schematic diagram of the connection between the first bushing and the first pin in the support leg structure provided by this utility model.

[0018] Explanation of reference numerals in the attached figures 1-Outrigger bracket; 2-First stop pin; 3-First fastener; 4-First pin shaft; 5-Third pin shaft; 6-Third fastener; 7-Third stop pin; 8-First bearing; 9-Hydraulic cylinder; 10-Second bearing; 11-Third bearing; 12-Second fastener; 13-Second stop pin; 14-Second pin shaft; 15-Steering axle; 16-First mounting plate; 17-Second mounting plate; 18-Third mounting plate; 19-Frame; 20-Wheel; 21-First axle sleeve. Detailed Implementation

[0019] The specific embodiments of this utility model 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 scope of this utility model.

[0020] In this utility model, unless otherwise stated, the terms "upper," "lower," "left," "right," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first," "second," etc., 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 utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this utility model, the descriptions using terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. 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.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 utility model according to the specific circumstances.

[0024] As mentioned above, in the high-speed machinery industry, see... Figure 1 As shown, the outrigger frame 1 of the X-type outrigger chassis is rigidly connected to the steering axle 15. This causes the platform to tilt when crossing obstacles or low-lying areas, resulting in the wheels 20 being suspended in the air, posing a safety hazard to the operator. Furthermore, when the platform is on complex terrain, such as roads with obstacles, the clearance between the platform and the ground cannot be adjusted, limiting its obstacle-crossing ability. When traversing low-lying work areas, the platform's stowage height cannot be lowered, further affecting its maneuverability. Additionally, the rigid connection between the outrigger frame 1 and the steering axle 15 lacks a leveling function, which can restrict boom lifting on sloping surfaces, affecting normal operation.

[0025] This utility model addresses the technical problems of poor maneuverability and lack of leveling function in existing aerial work platforms by providing a support leg structure. (See [link]). Figure 2 and Figure 3As shown, the outrigger structure includes: an outrigger frame 1, a steering axle 15 hinged to the outrigger frame 1, and an actuation device. The actuation device is hinged to both the outrigger frame 1 and the steering axle 15. The actuation device has a locked state and an unlocked state. When the actuation device is in the locked state, it can lock the outrigger frame 1 and the steering axle 15 to each other. When the actuation device is in the unlocked state, it can drive the outrigger frame 1 and the steering axle 15 to rotate relative to each other.

[0026] According to the outrigger structure of this utility model, the outrigger frame 1 is hinged to the steering axle 15, and the actuating device is hinged to both the outrigger frame 1 and the steering axle 15. When the actuating device is in the unlocked state, it can drive the outrigger frame 1 and the steering axle 15 to rotate relative to each other; when the actuating device is in the locked state, it prevents the outrigger frame 1 and the steering axle 15 from rotating relative to each other, thus achieving locking. Therefore, when the aerial work platform using the outrigger structure provided by this utility model is in the locked state, the aerial work platform can enter the working position. When the aerial work platform is in the stored position and traveling on rough roads, the actuating device is in the unlocked state, and the steering axle 15 can rotate relative to the outrigger frame 1, so that the steering axle 15 can keep in contact with the road surface, preventing the wheels 20 from being suspended in the air and improving the off-road capability of the aerial work platform. When the aerial work platform is in the retracted position and the actuator is unlocked, the actuator can drive the relative rotation of the outrigger 1 and the steering axle 15, thereby adjusting the chassis tilt angle and enabling leveling. After leveling, the actuator is locked, allowing the aerial work platform to enter the working position. This solves the problem of limited boom lifting when complex terrain does not meet construction conditions. Additionally, the relative rotation of the outrigger 1 and steering axle 15 can be driven by the actuator to adjust the gap between the chassis and the road surface. For example, reducing this gap lowers the retracted height of the aerial work platform, solving the problem of transportation limitations; increasing this gap improves the platform's ability to traverse complex terrain.

[0027] In one implementation, see Figure 2 and Figure 3 As shown, the actuation device can be a hydraulic cylinder 9, with both ends of the hydraulic cylinder 9 hinged to the outrigger 1 and the steering axle 15, respectively. When the hydraulic cylinder 9 is in the unlocked state, the outrigger 1 and the steering axle 15 can be driven to rotate relative to each other by pushing out and pulling back the hydraulic cylinder 9. When the hydraulic cylinder 9 is in the locked state, the outrigger 1 and the steering axle 15 can be kept fixed to each other.

[0028] It is understood that in the outrigger structure of this utility model, the actuation device can also be an electric cylinder, a pneumatic cylinder, etc.

[0029] Further, the hydraulic cylinder 9 includes a cylinder barrel and a cylinder rod. One of the cylinder barrel or the cylinder rod is hinged to the outrigger frame 1, and the other is hinged to the steering axle 15, thereby hinged the hydraulic cylinder 9 between the outrigger frame 1 and the steering axle 15. In a preferred embodiment, the cylinder barrel of the hydraulic cylinder 9 is hinged to the outrigger frame 1, and the cylinder rod of the hydraulic cylinder 9 is hinged to the steering axle 15. A piston connected to the cylinder rod is provided inside the cylinder barrel of the hydraulic cylinder 9. The piston divides the cylinder barrel into a large chamber and a small chamber, and the cylinder rod is connected to the side of the piston near the small chamber. According to a preferred embodiment of the outrigger structure of this utility model, the cylinder barrel is hinged to the outrigger frame 1, and the cylinder rod is hinged to the steering axle 15. When the steering axle 15 is extended relative to the outrigger frame 1, oil enters the large chamber of the cylinder barrel. The hydraulic oil pushes the piston and drives the cylinder rod to extend, thereby extending the steering axle 15. In comparison, if the cylinder barrel is hinged to the steering axle 15 and the cylinder rod is hinged to the outrigger 1, when the steering axle 15 is extended relative to the outrigger 1, oil enters the small chamber of the cylinder barrel, and the hydraulic oil pushes the piston and cylinder rod, thus extending the steering axle 15. Since the effective cross-sectional area of ​​the large chamber is greater than that of the small chamber, and the thrust generated by the hydraulic oil is equal to the product of the oil pressure and the effective cross-sectional area of ​​the large or small chamber, the hydraulic oil pressure required to control the extension of the steering axle 15 is relatively small when using the above-mentioned preferred embodiment of this utility model.

[0030] In some embodiments, the outrigger structure includes a first hinge assembly for hinged connection of the actuation device to the outrigger frame 1 and a second hinge assembly for hinged connection of the actuation device to the steering axle 15.

[0031] Preferably, see Figure 3 and Figure 4 As shown, the first hinge assembly includes a first bushing 21, a first mounting plate 16, a first pin 4, a first stop pin 2, and a first fastener 3. The first bushing 21 is connected to one end of the actuating device, such as a hydraulic cylinder 9. The first mounting plate 16 is connected to the end of the outrigger 1 near the hydraulic cylinder 9. The first mounting plate 16 has a first pin mounting hole. There are two first mounting plates 16, and they are arranged opposite each other. During assembly, the first bushing 21 is installed between the two first mounting plates 16. The first pin 4 passes through both the first pin mounting hole and the first bushing 21. The first stop pin 2 is located on the side of the first mounting plate 16 away from the first bushing 21 and passes through the first pin 4. The first fastener 3 passes through the first stop pin 2 and is fixedly connected to the first mounting plate 16. The actuating device and the outrigger 1 are hinged together by the aforementioned first hinge assembly.

[0032] Preferably, see Figure 3 and Figure 4As shown, the second hinge assembly includes a second bushing, a second mounting plate 17, a second pin 14, a second stop pin 13, and a second fastener 12. The second bushing is connected to the other end of the actuating device, such as the hydraulic cylinder 9. The second mounting plate 17 is connected to the end of the steering axle 15 near the actuating device. The second mounting plate 17 has a second pin mounting hole. There are two second mounting plates 17, which are arranged opposite each other. During assembly, the second bushing is installed between the two second mounting plates 17. The second pin 14 passes through the second pin mounting hole and the second bushing respectively. The second stop pin 13 is located on the side of the second mounting plate 17 away from the second bushing and passes through the second pin 14. The second fastener 12 passes through the second stop pin 13 and is fixedly connected to the second mounting plate 17. The actuating device and the steering axle 15 are hinged together by the aforementioned second hinge assembly.

[0033] In some embodiments, the outrigger structure includes a third articulation assembly for articulating the outrigger frame 1 with the bogie 15.

[0034] Preferably, see Figure 3 and Figure 4 As shown, the third hinge assembly includes a third mounting plate 18, a third bushing, a third pin 5, a third stop pin 7, and a third fastener 6. The third mounting plate 18 is connected to the end of the outrigger 1 near the steering axle 15, and the third bushing is connected to the end of the steering axle 15 near the outrigger 1. The third mounting plate 18 has a third pin mounting hole. There are two third mounting plates 18, and they are arranged opposite each other. During assembly, the third bushing is installed between the two third mounting plates 18. The third pin 5 passes through both the third pin mounting hole and the third bushing. The third stop pin 7 is located on the side of the third mounting plate 18 away from the third bushing and passes through the third pin 5. The third fastener 6 passes through the third stop pin 7 and is fixedly connected to the third mounting plate 18. The outrigger 1 and the steering axle 15 are hinged together using the aforementioned third hinge assembly.

[0035] According to the support leg structure of this utility model, the first fastener 3, the second fastener 12 and the third fastener 6 can be pins, bolts, etc.

[0036] Furthermore, combined Figure 3 and Figure 4 As shown, in a preferred embodiment, the first hinge assembly includes a first bearing 8, a first stepped hole is provided inside the first bushing 21 and near the end of the first bushing 21, the first bearing 8 is installed in the first stepped hole, the first step hole is used to achieve axial positioning of the first bearing 8, and the first pin 4 passes through the first bearing 8.

[0037] Furthermore, referring to Figure 3As shown, the second hinge assembly includes a second bearing 10. A second stepped hole is provided inside the second bushing and near the end of the second bushing. The second bearing 10 is installed in the second stepped hole, and the second bearing 10 is axially positioned through the second stepped hole. The second pin 14 passes through the second bearing 10.

[0038] Furthermore, referring to Figure 3 As shown, the third hinge assembly includes a third bearing 11. A third stepped hole is provided inside the third bushing and near the end of the third bushing. The third bearing 11 is installed in the third stepped hole, and the axial positioning of the third bearing 11 is achieved through the third stepped hole. The third pin 5 passes through the third bearing 11.

[0039] Based on the leg structure of this utility model, combined with Figure 2 and Figure 3 As shown, the first mounting plate 16 is disposed above the third mounting plate 18, and the second mounting plate 17 is disposed above the third bushing. In this outrigger structure, the second mounting plate 17 is disposed below the first mounting plate 16 and above the third mounting plate 18. The two ends of the actuating device, such as the hydraulic cylinder 9, are hinged to the first mounting plate 16 and the second mounting plate 17 respectively through the first bushing 21 and the second bushing, so that the hydraulic cylinder 9 is located above the hinge point between the outrigger frame 1 and the steering axle 15, and the hydraulic cylinder 9 extends in a generally inclined direction.

[0040] Based on this, the present invention also provides an X-shaped support leg chassis, combined with Figures 1-4 As shown, the X-type outrigger chassis includes a frame 19, wheels 20, and outrigger structures as described above. There are four outrigger structures. The end of the outrigger structure away from the steering axle 15 is hinged to the frame 19, and the wheels 20 are connected to the end of the steering axle 15 away from the outrigger frame 1.

[0041] In addition, this utility model also provides an aerial work platform, which includes a loading mechanism and an X-shaped outrigger chassis as described above, with the loading mechanism mounted on the X-shaped outrigger chassis.

[0042] In a preferred embodiment, the aerial work platform provided by this utility model includes a control unit, a first angle sensor mounted on the boom of the upper vehicle mechanism, and a second angle sensor mounted on the X-shaped outrigger chassis. The first angle sensor is used to monitor the boom's unfolding angle, and the second angle sensor is used to monitor the tilt angle between the X-shaped outrigger chassis and the ground. The operator can control the actuator to keep the upper vehicle mechanism level according to the tilt angle between the X-shaped outrigger chassis and the ground.

[0043] Specifically, the control unit sets corresponding thresholds according to the control program, such as a first preset angle and a second preset angle. The first angle sensor transmits the monitored boom extension angle, and the second angle sensor transmits the monitored X-shaped outrigger chassis tilt angle to the ground to the control unit. The control unit compares the extension angle with the first preset angle and the tilt angle with the second preset angle. The control unit has a normal working mode and a forced working mode. In the normal working mode, when the boom extension angle is greater than the first preset angle, the control unit determines that the aerial work platform is in the working position and controls the actuator to be locked. For example, if the actuator is a hydraulic cylinder 9, the control unit closes the solenoid valve by cutting off the current supplied to it, thereby locking the hydraulic cylinder 9. When the boom extension angle is not greater than the first preset angle, the control unit determines that the aerial work platform is in the retracted position and controls the hydraulic cylinder 9 to be unlocked, giving the outrigger structure a certain floating function and improving the off-road performance of the aerial work platform.

[0044] In forced operation mode, cylinder 9 can only be manually adjusted by the operator. When the boom's extension angle is less than the first preset angle, the operator adjusts the extension / retraction of each cylinder 9 according to the angle between the X-type outrigger chassis and the ground. When this angle is less than the second preset angle, it can be determined that the upper structure has been leveled, and cylinder 9 is locked. Alternatively, the operator can perform one-button leveling to keep the upper structure horizontal. According to this utility model of aerial work platform, when the aerial work platform is on complex ground, such as sloping ground, leveling can be achieved through the X-type outrigger chassis. After leveling is completed, cylinder 9 is locked, thus enabling the aerial work platform to adapt to construction work on complex road surfaces. When the boom's extension angle is greater than the first preset angle, cylinder 9 remains locked and cannot be adjusted.

[0045] When the aerial work platform is traveling on rough terrain, the aerial work platform is in the retracted position and the hydraulic cylinder 9 is in the unlocked state. The hydraulic cylinder 9 can be extended and retracted adaptively to achieve a floating function, so that the steering axle 15 and the wheels 20 can travel in closer contact with the road surface, thereby improving the off-road capability of the aerial work platform.

[0046] When the aerial work platform is in the retracted position, the hydraulic cylinder 9 can be manually adjusted to retract, thereby reducing the retracted height of the aerial work platform during transportation and overcoming transportation limitations. When the aerial work platform is in the retracted position, in the face of complex road conditions, the hydraulic cylinder 9 can be manually adjusted to extend, thereby increasing the ground clearance of the chassis of the aerial work platform and improving its passability.

[0047] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including the combination of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A support leg structure, characterized in that, include: Outrigger (1); Steering axle (15), the steering axle (15) being hinged to the outrigger frame (1); as well as, An actuation device is hinged to the outrigger (1) and the steering axle (15) respectively; The actuation device has a locked state that allows the outrigger (1) and the steering axle (15) to lock each other, and an unlocked state that allows the outrigger (1) and the steering axle (15) to rotate relative to each other.

2. The leg structure according to claim 1, characterized in that, The actuation device is a hydraulic cylinder (9), and the two ends of the hydraulic cylinder (9) are respectively hinged to the outrigger frame (1) and the steering axle (15).

3. The leg structure according to claim 2, characterized in that, The hydraulic cylinder (9) includes a cylinder barrel hinged to the outrigger (1) and a cylinder rod hinged to the steering axle (15).

4. The leg structure according to claim 1, characterized in that, The outrigger structure includes a first hinge assembly for hinged connection between the actuation device and the outrigger frame (1) and a second hinge assembly for hinged connection between the actuation device and the steering axle (15). The first hinge assembly includes a first bushing (21) connected to one end of the actuation device, a first mounting plate (16) connected to the support leg (1) near one end of the actuation device, a first pin (4) passing through the first mounting plate (16) and the first bushing (21) respectively, a first stop pin (2) disposed on the side of the first mounting plate (16) away from the first bushing (21) and passing through the first pin (4), and a first fastener (3) passing through the first stop pin (2) and fixedly connected to the first mounting plate (16). The second hinge assembly includes a second bushing connected to the other end of the actuation device, a second mounting plate (17) connected to the steering axle (15) near the end of the actuation device, a second pin (14) passing through the second mounting plate (17) and the second bushing respectively, a second stop pin (13) disposed on the side of the second mounting plate (17) away from the second bushing and passing through the second pin (14), and a second fastener (12) passing through the second stop pin (13) and fixedly connected to the second mounting plate (17).

5. The leg structure according to claim 4, characterized in that, The first hinge assembly includes a first bearing (8), and a first stepped hole is provided inside the first bushing (21) and near the end of the first bushing (21). The first bearing (8) is installed in the first stepped hole, and the first pin (4) passes through the first bearing (8). The second hinge assembly includes a second bearing (10), a second stepped hole is provided inside the second bushing and near the end of the second bushing, the second bearing (10) is installed in the second stepped hole, and the second pin (14) passes through the second bearing (10).

6. The leg structure according to any one of claims 1-5, characterized in that, The outrigger structure includes a third hinge assembly for hinged connection between the outrigger frame (1) and the steering axle (15). The third hinge assembly includes a third mounting plate (18) connected to the end of the outrigger frame (1) near the steering axle (15), a third bushing connected to the end of the steering axle (15) near the outrigger frame (1), a third pin (5) passing through the third mounting plate (18) and the third bushing respectively, a third stop pin (7) disposed on the side of the third mounting plate (18) away from the third bushing and passing through the third pin (5), and a third fastener (6) passing through the third stop pin (7) and fixedly connected to the third mounting plate (18).

7. The leg structure according to claim 6, characterized in that, The third hinge assembly includes a third bearing (11), and a third stepped hole is provided inside the third bushing and near the end of the third bushing. The third bearing (11) is installed in the third stepped hole, and the third pin (5) passes through the third bearing (11).

8. An X-shaped outrigger chassis, characterized in that, The vehicle includes a frame (19), wheels (20), and outrigger structures as described in any one of claims 1-7, wherein the frame (19) is hinged to four of the outrigger structures, and the wheels (20) are connected to the end of the steering axle (15) away from the outrigger frame (1).

9. A high-altitude work device, characterized in that, It includes a loading mechanism and an X-shaped outrigger chassis as described in claim 8, wherein the loading mechanism is mounted on the X-shaped outrigger chassis.

10. The aerial work platform according to claim 9, characterized in that, The aerial work platform includes a control unit, a first angle sensor mounted on the boom of the upper structure, and a second angle sensor mounted on the X-shaped outrigger chassis. The first angle sensor is used to monitor the extension angle of the boom, and the second angle sensor is used to monitor the tilt angle between the X-shaped outrigger chassis and the ground. The operator can control the actuation device to keep the upper structure level according to the tilt angle between the X-shaped outrigger chassis and the ground.

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