Outrigger structure, x-outrigger chassis, and aerial device

Abstract

The utility model relates to high altitude operation platform technical field discloses a kind of support leg structure, X type support leg chassis and aerial work device, comprising: support leg frame, steering bridge, actuating device, first connecting rod and second connecting rod, and actuating device is respectively hinged with support leg frame and steering bridge;First connecting rod is respectively hinged with the top of steering bridge and support leg frame, and second connecting rod is respectively hinged with the bottom of steering bridge and support leg frame;Wherein, actuating device has the locking state of making support leg frame and steering bridge can be locked each other and the unlocking state of making support leg frame and steering bridge can be relatively rotated each other. When actuating device is in unlocking state by the above technical scheme, actuating device can drive support leg frame and steering bridge relatively rotate each other, so as to improve the passability of aerial work device using the support leg structure and make the aerial work device have leveling function, to further adapt to the construction condition of complex road condition;When actuating device is in locking state, make support leg frame and steering bridge lock each other, so as to facilitate aerial work device to work.

Description

Technical Field

[0001] This utility model relates to the field of aerial work platform technology, specifically to a leg structure. Based on this, the utility model also specifically relates to an X-shaped 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 2, each hinged to the frame 19. These four outrigger frames 2 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 2 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 2 and steering axle 15 are essentially connected as a rigid structure. This causes the aerial work platform to tilt when crossing obstacles or traversing low-lying areas, resulting in the wheels 20 being suspended in the air, thus posing a safety hazard to the operator. Furthermore, when the aerial work platform is on complex road conditions, such as those with obstacles, the clearance between the platform and the ground cannot be adjusted, limiting its obstacle-crossing ability. When traversing low-lying work areas, its retracted height cannot be lowered, further affecting its maneuverability. Additionally, the rigid connection between the outrigger frame 2 and steering axle 15 in aerial work platforms lacks a leveling function, which can easily restrict boom lifting on sloping surfaces, 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 an outrigger structure, comprising: an outrigger frame and a steering axle; an actuation device, the actuation device being hinged to the outrigger frame and the steering axle respectively; a first link, the first link being hinged to the top of the steering axle and the outrigger frame respectively; and a second link, the second link being hinged to the bottom of the steering axle and the outrigger frame respectively; wherein, the actuation device has a locked state that allows the outrigger frame and the steering axle to lock against each other and an unlocked state that allows the outrigger 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 to the actuation device, the outrigger bracket, and the first connecting rod, and a second hinge assembly for hinged to the actuation device, the steering axle, and the second connecting rod. The first hinge assembly includes a first bushing connected to one end of the actuation device, a first mounting plate connected to the outrigger bracket near the actuation device, a first pin passing through the first connecting rod, the first mounting plate, and the first bushing, a first stop pin located on the side of the first connecting rod 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 connecting rod. 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 actuation device, a second pin passing through the second connecting rod, the second mounting plate, and the second bushing, a second stop pin located on the side of the second connecting rod 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 connecting rod.

[0009] In some embodiments, the first hinge assembly includes a first bearing and a fifth bearing. A first stepped hole is provided inside the first bushing near the end of the first bushing, and the first bearing is installed in the first stepped hole. A fifth stepped hole is provided inside the first mounting plate, and the fifth bearing is installed in the fifth step. The first pin passes through the first bearing and the fifth bearing respectively. The second hinge assembly includes a second bearing and a sixth bearing. A second stepped hole is provided inside the second bushing near the end of the second bushing, and the second bearing is installed in the second stepped hole. A sixth stepped hole is provided inside the second mounting plate, and the sixth bearing is installed in the sixth step. The second pin passes through the second bearing and the sixth bearing respectively.

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

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

[0012] Based on this, the present invention also provides an X-type outrigger chassis, including a frame, wheels and outrigger structures as described above, wherein the frame is hinged to four 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 a high-altitude work device, including a loading mechanism and an X-shaped outrigger chassis as described above, 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 actuation device is hinged to the outriggers and the steering axle respectively. The outriggers and the steering axle are hinged through a first link and a second link respectively. When the actuation device is in the unlocked state, it can drive the outriggers and the steering axle to rotate relative to each other. When the actuation device is in the locked state, it prevents the outriggers and the 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 actuation device 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 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 actuation device is in the unlocked state, the relative rotation of the outriggers and the steering axle can be driven by the actuation device 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 actuation device is locked, 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-First connecting rod; 2-Outrigger bracket; 3-First pin; 4-First stop pin; 5-First fastener; 6-First bearing; 7-Third bearing; 8-Third stop pin; 9-Third fastener; 10-Hydraulic cylinder; 11-Fourth bearing; 12-Second bearing; 13-Second pin; 14-Fourth pin; 15-Steering axle; 16-Second connecting rod; 17-Third pin; 18-First mounting plate; 19-Frame; 20-Wheel; 21-First axle sleeve; 22-Third axle sleeve; 23-Fourth axle sleeve; 24-Second stop pin; 25-Second fastener; 26-Fourth stop pin; 27-Fourth fastener; 28-Fifth bearing; 29-Sixth bearing. 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 2 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 2 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 3 As shown, the outrigger structure includes: an outrigger frame 2, a steering axle 15, an actuator, a first link 1, and a second link 16. The actuator is hinged to the outrigger frame 2 and the steering axle 15 respectively. The first link 1 is hinged to the top of the steering axle 15 and the outrigger frame 2 respectively. The second link 16 is hinged to the bottom of the steering axle 15 and the outrigger frame 2 respectively. The actuator has a locked state and an unlocked state. When the actuator is in the locked state, it can lock the outrigger frame 2 and the steering axle 15 to each other. When the actuator is in the unlocked state, it can drive the outrigger frame 2 and the steering axle 15 to rotate relative to each other.

[0026] According to the outrigger structure of this utility model, the actuation device is hinged to the outrigger frame 2 and the steering axle 15 respectively. The top of the outrigger frame 2 and the top of the steering axle 15 are hinged to both ends of the first connecting rod 1, and the bottom of the outrigger frame 2 and the bottom of the steering axle 15 are hinged to both ends of the second connecting rod 16. When the actuation device is in the unlocked state, it can drive the outrigger frame 2 and the steering axle 15 to rotate relative to each other; when the actuation device is in the locked state, it prevents the outrigger frame 2 and the steering axle 15 from rotating relative to each other, thus achieving locking. Therefore, with the outrigger structure provided by this utility model, the aerial work platform can enter the working position after the actuation device is in the locked state. When the aerial work platform is in the stored position and traveling on rough roads, the actuation device is in the unlocked state, and the steering axle 15 can rotate relative to the outrigger frame 2, 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 2 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 2 and steering axle 15 can be driven by the actuator to adjust the gap between the aerial work platform's 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 10, with both ends of the hydraulic cylinder 10 hinged to the outrigger 2 and the steering axle 15, respectively. When the hydraulic cylinder 10 is in the unlocked state, the outrigger 2 and the steering axle 15 can be driven to rotate relative to each other by pushing out and pulling back the hydraulic cylinder 10. When the hydraulic cylinder 10 is in the locked state, the outrigger 2 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 10 includes a cylinder barrel and a cylinder rod. One of the cylinder barrel or the cylinder rod is hinged to the outrigger bracket 2, and the other is hinged to the steering axle 15, thereby hinged the hydraulic cylinder 10 between the outrigger bracket 2 and the steering axle 15. In a preferred embodiment, the cylinder barrel of the hydraulic cylinder 10 is hinged to the outrigger bracket 2, and the cylinder rod of the hydraulic cylinder 10 is hinged to the steering axle 15. A piston connected to the cylinder rod is provided inside the cylinder barrel of the hydraulic cylinder 10. 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 bracket 2, and the cylinder rod is hinged to the steering axle 15. When the steering axle 15 is extended relative to the outrigger bracket 2, 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 2, when the steering axle 15 is extended relative to the outrigger 2, 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 invention.

[0030] In some implementations, see Figure 2 and Figure 3 As shown, the first link 1 can be a one-piece structure, and the second link 16 can be a strip-shaped rod. There are two second links 16, which are respectively located on the outer sides of the outrigger frame 2 and the steering axle 15. In some variant embodiments, the first link 1 can be a strip-shaped rod, and / or the second link 16 can be a one-piece structure.

[0031] In some embodiments, the outrigger structure includes a first hinge assembly for hinged to the actuation device, the outrigger bracket 2 and the first link 1, and a second hinge assembly for hinged to the actuation device, the steering axle 15 and the second link 16.

[0032] Preferably, see Figure 3 and Figure 4As shown, the first hinge assembly includes a first bushing 21, a first mounting plate 18, a first pin 3, a first stop pin 4, and a first fastener 5. The first bushing 21 is connected to one end of an actuating device, such as a hydraulic cylinder 10. The first mounting plate 18 is connected to the end of the outrigger 2 near the hydraulic cylinder 10 and to the top of the outrigger 2. The first mounting plate 18 has a first pin mounting hole. There are two first mounting plates 18, which are arranged opposite each other. The first connecting rod 1 has a first connecting rod pin mounting hole A at its end near the outrigger 2. During assembly, the first bushing 21 is installed between the two first mounting plates 18. The first pin mounting hole is correspondingly set with the first connecting rod pin mounting hole A, and the first connecting rod pin mounting hole A is located outside the first pin mounting hole. The first pin 3 passes through the first connecting rod pin mounting hole A, the first pin mounting hole and the first bushing 21 respectively. The first stop pin 4 is set on the side of the first connecting rod 1 away from the first bushing 21 and passes through the first pin 3. The first fastener 5 passes through the first stop pin 4 and is fixedly connected to the first connecting rod 1. The first hinge assembly described above enables the actuation device near the leg frame 2, the top of the leg frame 2 and the first connecting rod 1 near the leg frame 2 to be hinged together.

[0033] Preferably, see Figure 3 and Figure 4 As shown, the second hinge assembly includes a second bushing, a second mounting plate, a second pin 13, a second stop pin 24, and a second fastener 25. The second bushing is connected to the other end of an actuating device, such as a hydraulic cylinder 10. The second mounting plate is connected to the end of the steering axle 15 near the actuating device and to the bottom of the steering axle 15. The second mounting plate has a second pin mounting hole. There are two second mounting plates, which are arranged opposite each other. The end of the second connecting rod 16 near the steering axle 15 has a second connecting rod pin mounting hole A. During assembly, the second bushing is installed between the two second mounting plates. The second pin mounting hole is correspondingly set with the second connecting rod pin mounting hole A, and the second connecting rod pin mounting hole A is located outside the second pin mounting hole. The second pin 13 passes through the second connecting rod pin mounting hole A, the second pin mounting hole and the second bushing respectively. The second stop pin 24 is set on the side of the second connecting rod 16 away from the second bushing and passes through the second pin 13. The second fastener 25 passes through the second stop pin 24 and is fixedly connected to the second connecting rod 16. The second hinge assembly described above enables the actuation device near the other end of the steering axle 15, the bottom of the steering axle 15 and the second connecting rod 16 near the steering axle 15 to be hinged together.

[0034] In some embodiments, the outrigger structure includes a third hinge assembly for hinged outrigger 2 to the second link 16 and a fourth hinge assembly for hinged steering axle 15 to the first link 1.

[0035] Preferably, see Figure 3 and Figure 4 As shown, the third hinge assembly includes a third bushing 22, a third pin 17, a third stop pin 8, and a third fastener 9. The third bushing 22 is connected to the bottom of the outrigger 2 near the steering axle 15. The second connecting rod 16 has a second connecting rod pin mounting hole B at one end near the outrigger 2. During assembly, the second connecting rod 16 is mounted on the outside of the third bushing 22, so that the second connecting rod pin mounting hole B corresponds to the through hole of the third bushing 22. The third pin 17 passes through both the second connecting rod pin mounting hole B and the third bushing 22. The third stop pin 8 is located on the side of the second connecting rod 16 away from the third bushing 22 and passes through the third pin 17. The third fastener 9 passes through the third stop pin 8 and is fixedly connected to the second connecting rod 16. The bottom of the outrigger 2 is hinged to the second connecting rod 16 through this third hinge assembly.

[0036] Preferably, see Figure 3 and Figure 4 As shown, the fourth hinge assembly includes a fourth bushing 23, a fourth pin 14, a fourth stop pin 26, and a fourth fastener 27. The fourth bushing 23 is connected to the top of the steering axle 15 near the support leg 2. The first connecting rod 1 has a first connecting rod pin mounting hole B at one end near the steering axle 15. During assembly, the first connecting rod pin mounting hole B corresponds to the through hole in the fourth bushing 23, and the first connecting rod pin mounting hole B is located on the outside of the fourth bushing 23. The fourth pin 14 passes through both the first connecting rod pin mounting hole B and the fourth bushing 23. The fourth stop pin 26 is located on the side of the first connecting rod 1 away from the fourth bushing 23 and passes through the fourth pin 14. The fourth fastener 27 passes through the fourth stop pin 26 and is fixedly connected to the first connecting rod 1. The fourth hinge assembly thus hinges the top of the steering axle 15 to the first connecting rod 1.

[0037] According to the support leg structure of this utility model, the first fastener 5, the second fastener 25 and the third fastener 9 can be pins, bolts, etc.

[0038] Furthermore, combined Figure 3 and Figure 4 As shown, in a preferred embodiment, the first hinge assembly includes a first bearing 6 and a fifth bearing 28. A first stepped hole is provided inside the first bushing 21 and near the end of the first bushing 21. The first bearing 6 is installed in the first stepped hole. A fifth stepped hole is provided in the first pin mounting hole of the first mounting plate. The fifth bearing 28 is installed in the fifth stepped hole. The first stepped hole and the fifth stepped hole respectively achieve axial positioning of the first bearing 6 and the fifth bearing 28. The first pin 3 passes through the first bearing 6 and the fifth bearing 28 respectively.

[0039] Furthermore, referring to Figure 3As shown, the second hinge assembly includes a second bearing 12 and a sixth bearing 29. A second stepped hole is provided inside the second bushing and near the end of the second bushing. The second bearing 12 is installed in the second stepped hole. A sixth stepped hole is provided in the second pin mounting hole of the second mounting plate. The sixth bearing 29 is installed in the sixth stepped hole. The second stepped hole and the sixth stepped hole respectively achieve axial positioning of the second bearing 12 and the sixth bearing 29. The second pin 13 passes through the second bearing 12 and the sixth bearing respectively.

[0040] Furthermore, referring to Figure 3 As shown, the third hinge assembly includes a third bearing 7. A third stepped hole is provided inside the third bushing 22 and near the end of the third bushing 22. The third bearing 7 is installed in the third stepped hole, and the axial positioning of the third bearing 7 is achieved through the third stepped hole. The third pin 17 passes through the third bearing 7.

[0041] Furthermore, referring to Figure 3 As shown, the fourth hinge assembly includes a fourth bearing 11. A fourth stepped hole is provided inside the fourth bushing 23 and near the end of the fourth bushing 23. The fourth bearing 11 is installed in the fourth stepped hole, and the fourth bearing 11 is axially positioned through the fourth stepped hole. The fourth pin 14 passes through the fourth bearing 11.

[0042] Based on the support leg structure of this utility model, combined with Figure 2 and Figure 3 As shown above, the first mounting plate 18 is positioned above the third bushing 22, and the fourth bushing 23 is positioned above the second mounting plate. The two ends of the actuating device, such as the hydraulic cylinder 10, are hinged to the first mounting plate 18 and the second mounting plate respectively through the first bushing 21 and the second bushing, so that the hydraulic cylinder 10 is positioned above the hinge point between the outrigger 2 and the steering axle 15, and the hydraulic cylinder 10 extends in a generally inclined direction to facilitate the relative rotation and locking of the outrigger 2 and the steering axle 15.

[0043] 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 2.

[0044] 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.

[0045] 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.

[0046] 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 10, the control unit closes the solenoid valve by shutting off the current supplied to it, thereby locking the hydraulic cylinder 10. 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 10 to be unlocked, giving the outrigger structure a certain floating function and improving the off-road performance of the aerial work platform.

[0047] In forced operation mode, cylinder 10 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 10 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 the cylinder 10 is locked. Alternatively, the operator can perform one-button leveling to keep the upper structure level. 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, the cylinder 10 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, the cylinder 10 remains locked and cannot be adjusted.

[0048] When the aerial work platform is traveling on rough terrain, the aerial work platform is in the retracted position and the hydraulic cylinder 10 is in the unlocked state. The hydraulic cylinder 10 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.

[0049] When the aerial work platform is in the retracted position, the hydraulic cylinder 10 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 10 can be manually adjusted to extend, thereby increasing the ground clearance of the chassis of the aerial work platform and improving its passability.

[0050] 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: Outriggers (2) and steering axle (15); An actuation device is hinged to the outrigger (2) and the steering axle (15) respectively; The first link (1) is hinged to the top of the steering axle (15) and the outrigger (2), respectively; and, The second link (16) is hinged to the bottom of the steering axle (15) and the outrigger (2) respectively; The actuation device has a locked state that allows the outrigger (2) and the steering axle (15) to lock each other, and an unlocked state that allows the outrigger (2) 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 (10), and the two ends of the hydraulic cylinder (10) are respectively hinged to the outrigger frame (2) and the steering axle (15).

3. The leg structure according to claim 2, characterized in that, The hydraulic cylinder (10) includes a cylinder barrel hinged to the outrigger (2) 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 to the actuation device, the outrigger frame (2) and the first link (1) and a second hinge assembly for hinged to the actuation device, the steering axle (15) and the second link (16). The first hinge assembly includes a first bushing (21) connected to one end of the actuation device, a first mounting plate (18) connected to the leg frame (2) near one end of the actuation device, a first pin (3) passing through the first connecting rod (1), the first mounting plate (18) and the first bushing (21) respectively, a first stop pin (4) disposed on the side of the first connecting rod (1) away from the first bushing (21) and passing through the first pin (3), and a first fastener (5) passing through the first stop pin (4) and fixedly connected to the first connecting rod (1). 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 (15) near the end of the actuation device, a second pin (13) passing through the second link (16), the second mounting plate and the second bushing respectively, a second stop pin (24) disposed on the side of the second link (16) away from the second bushing and passing through the second pin (13), and a second fastener (25) passing through the second stop pin (24) and fixedly connected to the second link (16).

5. The leg structure according to claim 4, characterized in that, The first hinge assembly includes a first bearing (6) and a fifth bearing (28). A first stepped hole is provided inside the first bushing (21) and near the end of the first bushing (21). The first bearing (6) is installed in the first stepped hole. A fifth stepped hole is provided inside the first mounting plate (18). The fifth bearing (28) is installed in the fifth step. The first pin (3) passes through the first bearing (6) and the fifth bearing (28) respectively. The second hinge assembly includes a second bearing (12) and a sixth bearing (29). A second stepped hole is provided inside the second bushing and near the end of the second bushing. The second bearing (12) is installed in the second stepped hole. A sixth stepped hole is provided inside the second mounting plate. The sixth bearing (29) is installed in the sixth step. The second pin (13) passes through the second bearing (12) and the sixth bearing (29) respectively.

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 of the outrigger frame (2) to the second link (16) and a fourth hinge assembly for hinged connection of the steering axle (15) to the first link (1). The third hinge assembly includes a third bushing (22) connected to the end of the outrigger (2) near the steering axle (15), a third pin (17) passing through the third bushing (22) and the second link (16), a third stop pin (8) disposed on the side of the second link (16) away from the third bushing (22) and passing through the third pin (17), and a third fastener (9) passing through the third stop pin (8) and fixedly connected to the second link (16). The fourth hinge assembly includes a fourth bushing (23) connected to the end of the steering axle (15) near the outrigger (2), a fourth pin (14) passing through the fourth bushing (23) and the first connecting rod (1), a fourth stop pin (26) disposed on the side of the first connecting rod (1) away from the fourth bushing (23) and passing through the fourth pin (14), and a fourth fastener (27) passing through the fourth stop pin (26) and fixedly connected to the first connecting rod (1).

7. The leg structure according to claim 6, characterized in that, The third hinge assembly includes a third bearing (7), and a third stepped hole is provided inside the third bushing (22) and near the end of the third bushing (22). The third bearing (7) is installed in the third stepped hole, and the third pin (17) passes through the third bearing (7). The fourth hinge assembly includes a fourth bearing (11), and a fourth stepped hole is provided inside the fourth bushing (23) and near the end of the fourth bushing (23). The fourth bearing (11) is installed in the fourth stepped hole, and the fourth pin (14) passes through the fourth 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 (2).

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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