Aerial work truck

Abstract

This invention belongs to the field of lifting devices and relates to aerial work platforms, including outrigger cylinder assemblies. The outrigger cylinder assembly includes at least two support mechanisms mounted on the vehicle body. Each support mechanism includes: a crossbeam extending to the front and rear sides of the vehicle body; multiple swing arms, each pivotally mounted at least at the front and rear ends of the crossbeam, allowing the swing arms to rotate relative to the crossbeam about a vertical axis; multiple sliding arms corresponding to and matched with the swing arms, configured on the swing arms in a linear slide rail structure, allowing them to reciprocate relative to the swing arms; multiple drive mechanisms (first type) corresponding to and matched with the swing arms, fixedly mounted at the ends of the swing arms, capable of driving the sliding arms to move; multiple drive mechanisms (second type) corresponding to and matched with the swing arms, fixedly mounted at the ends of the crossbeam, capable of driving the swing arms to rotate; and multiple telescopic cylinders, each fixedly mounted on a sliding arm. This application overcomes the problem of poor support stability when operating in complex terrain with poor ground flatness, contributing to improved support reliability and safety.

Description

Technical Field

[0001] This invention belongs to the field of lifting devices, specifically relating to a high-altitude work platform vehicle that can operate in confined environments with uneven ground. Background Technology

[0002] Aerial work platforms (ADPs) are widely used in various fields such as building construction, tunnel maintenance, scenic spot repair, and cave exploration. However, with the diversification and increasing complexity of work scenarios, higher demands are being placed on the adaptability of this type of equipment.

[0003] Existing fully self-propelled aerial work platforms have stringent requirements regarding the size of the workspace and the flatness of the ground. They are generally suitable for scenarios with relatively flat ground and cannot effectively handle confined spaces with poor ground flatness, such as tunnels and caves. In particular, they struggle to navigate confined spaces like cave entrances, narrow tunnels, and narrow passageways at scenic spots, and cannot adapt to environments with extremely uneven ground in these confined spaces, failing to provide adequate stable support to ensure operational safety. Furthermore, while some existing equipment attempts to reduce weight by using lightweight materials, these improvements often only target single components and suffer from insufficient structural strength and inadequate safety, resulting in low efficiency and high safety risks in aerial work in specific scenarios. Summary of the Invention

[0004] The aerial work platform provided by this invention aims to overcome the problem of poor support stability when working on sites with complex terrain and poor ground flatness.

[0005] The technical solution adopted by this invention to solve its technical problem is: an aerial work platform vehicle, including a base, a crank arm assembly, a telescopic arm assembly, a boom assembly, a work platform, and a support leg cylinder assembly mounted on the vehicle body. Specifically, the base is pivotally mounted on the upper part of the vehicle body and matches a drive unit mounted on the vehicle body, enabling the drive unit to drive the base to rotate relative to the vehicle body around a vertical axis. The crank arm assembly, telescopic arm assembly, boom assembly, and support leg cylinder assembly are also matched with the drive unit, enabling the drive unit to drive them to complete their respective actions. The lower end of the crank arm assembly matches the base, allowing the base to carry the crank arm assembly and rotate synchronously relative to the base. One end of the telescopic arm assembly matches the upper end of the crank arm assembly, and the other end matches the boom assembly, with the work platform connected to the main body of the boom assembly. A support cylinder mounting position for fixing and installing the support leg cylinder assembly is provided on the vehicle body, generally positioned relative to the inside or outside of the vehicle body's wheels. The outrigger cylinder assembly includes at least two support mechanisms arranged alternately on the vehicle body. Each support mechanism includes:

[0006] The crossbeam is fixed to the vehicle body and extends to the front and rear sides of the vehicle body at both ends;

[0007] Multiple swing arms are provided, with at least one pivotally mounted at each of the front and rear ends of the crossbeam, and the swing arms are able to rotate relative to the crossbeam about a vertical axis.

[0008] Multiple sliding arms are matched one-to-one with the swing arm and are arranged on the free end of the swing arm in a linear slide rail structure, so that the sliding arms can reciprocate relative to the swing arm in the length extension direction of the swing arm.

[0009] Multiple drive mechanisms are matched one-to-one with the swing arm and are fixedly installed at the end of the swing arm, and can drive the sliding arm to reciprocate relative to the swing arm.

[0010] Multiple drive mechanisms, each corresponding to a swing arm, are fixedly mounted at the end of the crossbeam and can drive the swing arms to rotate relative to the crossbeam; and

[0011] Multiple telescopic cylinders are fixedly installed at the free ends of each sliding arm, and a support plate is provided at the lower end of the cylinder rod of each telescopic cylinder.

[0012] Optionally, the support mechanism includes four swing arms, which are evenly distributed at both ends of the crossbeam.

[0013] The pivot positions of the two swing arms at the same end are respectively close to the left and right sides of the crossbeam, and the two swing arms can be rotated to the left side of the left side of the crossbeam and the right side of the right side of the crossbeam respectively, and can simultaneously swing to approximately along the length of the crossbeam.

[0014] Optionally, grooves are formed at the exposed ends of the crossbeams. The pivot end of the swing arm is inserted into the groove, and the front or rear side, as well as the left or right side of the groove, are formed as open structures, so that the swing arm can rotate and swing relative to the exposed end within an angle range of at least close to 90 degrees.

[0015] Optionally, a plurality of vertically extending protruding pillars are provided alternately on the outer side of the pivot end, and the centerlines of the plurality of protruding pillars are distributed on the same circumferential surface. An arc-shaped channel matching the protruding pillars is provided on the inner bottom surface of the groove. The end of the protruding pillar can be inserted into the arc-shaped channel.

[0016] Optionally, a toothed surface is provided on the pivot end. A gear that meshes with the toothed surface is provided inside the groove. A cover plate is detachably fixed to the upper part of the exposed end. A drive mechanism two is fixed to the upper end face of the cover plate one. The output end of the drive mechanism two matches the gear, thereby enabling the swing arm to rotate relative to the crossbeam.

[0017] Optionally, a cover plate two is detachably fixed to the upper part of the portion of the swing arm exposed outside the crossbeam. Grooves extending along the length of the swing arm are formed on the upper end face of the swing arm and the lower end face of the cover plate two, respectively. Raised rail portions matching the grooves are formed on the upper and lower end faces of the sliding arm, respectively.

[0018] Optionally, the grooved rail portions formed on the upper end face of the swing arm and the grooved rail portions formed on the lower end faces of the cover plate are arranged in alternating patterns. Similarly, the convex rail portions formed on the upper and lower sides of the sliding arm are arranged in alternating patterns. Each convex rail portion can simultaneously mate with each grooved rail portion.

[0019] Optionally, a drive mechanism is fixedly mounted on a cover plate. A vertically penetrating slot is formed on the cover plate, allowing the gear at the output end of the drive mechanism to align with the upper part of the slide arm via the slot. A rack portion is provided on the slide arm, extending along its length. The gear at the output end of the drive mechanism can mesh with the rack portion to drive the slide arm to slide relative to the rocker arm.

[0020] Optionally, a countersunk hole is formed at the center of the lower end face of the support leg plate, and an annular rubber pad is fixed to the lower end of the side wall. An auxiliary plate is provided inside the countersunk hole.

[0021] A second rubber pad is fixedly mounted on the lower end face of the auxiliary disk. The edge of the second rubber pad forms an annular flange, which surrounds the lower part of the side wall of the auxiliary disk. The depth of the countersunk hole is less than the sum of the thickness of the auxiliary disk and the thickness of the second rubber pad. The upper part of the auxiliary disk has multiple vertically extending guide posts, and elastic elements are mounted on the guide posts.

[0022] After the auxiliary plate is connected to the support plate, the elastic element can drive the auxiliary plate to reciprocate relative to the countersunk hole, thereby allowing the lower end of the rubber pad II to change between extending outward from the lower port of the countersunk hole and retracting inward from the lower port of the countersunk hole.

[0023] Optionally, multiple radial grooves are provided alternately on the outer circumferential surface of the rubber pad one, and / or multiple radial grooves are provided alternately on the outer circumferential surface of the annular flange of the rubber pad two. The radial grooves facilitate elastic deformation of the rubber pad one and the annular flange, allowing for greater and more flexible deformation, and enabling the edges of the support plate and auxiliary plate to better adapt to the uneven support contact surface, forming a good and stable support contact. Preferably, a groove structure is formed in the central section of the lower end face of the rubber pad two body, and a protrusion structure is formed on the inner bottom surface of the groove structure. The protrusion structure contains multiple types of protrusions, and each type of protrusion is present in multiple quantities. The free end faces of the protrusions are all flush with the lower end face of the rubber pad two body. At least some of the same type of protrusions are distributed alternately around the circumference.

[0024] The beneficial effects of this invention are as follows: This application optimizes and improves the support mechanism of the aerial work platform vehicle, enabling it to better adapt to complex work site conditions, especially in scenarios where the ground lacks a large flat surface and has significant unevenness. Furthermore, the designed support mechanism can be folded and retracted relative to the vehicle body, meeting the practical needs of the aerial work platform vehicle to pass through narrow passages. Specifically, the telescopic cylinders arranged at the four corners of the rectangle on the aerial work platform vehicle can move within a swing angle range of approximately 90 degrees, and can be folded and retracted in the left and right directions, facilitating the miniaturization of the aerial work platform vehicle's width and passage through narrow passages; simultaneously, they can also extend and retract in the length extension direction of the swing arm, facilitating the full expansion of the corresponding position surface of the telescopic cylinders, allowing each telescopic cylinder to be selectively positioned above a relatively flat (work site) surface for stable support. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the external structure of an aerial work platform vehicle (without the outrigger cylinder assembly installed).

[0026] Figure 2 This is a top view schematic diagram showing the relationship between the main innovative parts of this application and the vehicle body assembly.

[0027] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point I in the middle.

[0028] Figure 4 for Figure 2 A magnified schematic diagram of the structure at point II.

[0029] Figure 5 This is a top view of the outrigger cylinder assembly of this application, showing the state with a cover plate installed at one end of the crossbeam.

[0030] Figure 6 This is a partial cross-sectional structural diagram of the lower end of the telescopic cylinder (i.e., the outrigger cylinder).

[0031] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point III.

[0032] Figure 8 This is a schematic diagram of the support leg plate from below.

[0033] In the diagram: 10 Car body; 11 Support cylinder assembly position; 20 Base; 30 Articulated boom assembly; 40 Telescopic boom assembly; 50 Flying boom assembly; 60 Working platform; 70 Outrigger cylinder assembly; 71 Crossbeam; 711 Exposed end; 712 Type groove; 7121 Stop block one; 7122 Stop block two; 713 Cover plate one; 714 Vertical plate; 72 Swing arm; 721 Pivot end; 7211 Toothed surface; 7212 Protruding column; 722 Cover plate two; 723 Track section; 73 Sliding arm, 731 convex rail part, 732 rack part, 74 drive mechanism one, 75 drive mechanism two, 751 gear, 76 telescopic cylinder, 761 connecting frame, 762 support leg plate, 7621 countersunk hole part, 7622 rubber pad one, 763 auxiliary plate, 7631 guide post, 7632 spring one, 7633 spring two, 7634 nut part, 764 spacing, 765 rubber pad two, 7651 groove structure, 7652 protrusion structure, 766 radial groove. Detailed Implementation

[0034] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0035] like Figures 1 to 5 The aerial work platform vehicle shown includes a base 20 mounted on a vehicle body 10, a boom assembly 30, a telescopic boom assembly 40, a boom 50, a work platform 60, and an outrigger cylinder assembly 70. See details below. Figure 1The base 20 is pivotally mounted on the upper part of the vehicle body 10 and matches a drive unit mounted on the vehicle body 10, enabling the drive unit to drive the base 20 to rotate relative to the vehicle body 10 around a vertical axis. The crank arm assembly 30, the telescopic arm assembly 40, the flying arm assembly 50, and the outrigger cylinder assembly 70 are also matched with the drive unit, enabling the drive unit to drive them to perform corresponding actions, such as folding, unfolding, extending, and shortening. The lower end of the crank arm assembly 30 matches the base 20, allowing the base 20 to carry the crank arm assembly 30 and rotate synchronously relative to it. One end of the telescopic arm assembly 40 matches the upper end of the crank arm assembly 30, and the other end matches the flying arm assembly 50, with the work platform 60 connected to the main body of the flying arm assembly 50. A support cylinder mounting position 11 for fixing and installing the outrigger cylinder assembly 70 is provided on the vehicle body 10. Generally, the support cylinder mounting position 11 is positioned relative to the inner or outer side of the wheel of the vehicle body 10 (i.e., the left or right side as shown in the figure). Referring to the prior art, four telescopic cylinders 76 (or telescopic cylinder outriggers, hydraulic telescopic cylinders, etc.) are used, and these four telescopic cylinders 76 are relatively distributed at the four corners of a rectangular surface. In this application, there are two support cylinder mounting positions 11 on the vehicle body 10, and these two support cylinder mounting positions 11 are arranged left and right opposite each other. See [reference needed]. Figure 1 , Figure 2 View. Given that the aforementioned technical features mainly fall within the scope of existing technology or can be easily implemented by those skilled in the art by referring to existing technology, they will not be elaborated further.

[0036] The technical solution of this application mainly improves the specific implementation structure of the outrigger cylinder assembly 70, abandons the method of simply using four telescopic cylinders 76 for support, and increases the adjustability of the outrigger cylinder assembly 70, so as to make it have good operational flexibility and achieve its purpose of stable support for the aerial work platform vehicle.

[0037] like Figures 2 to 5 As shown, the outrigger cylinder assembly 70 includes two support mechanisms arranged alternately on the vehicle body 10. Each support mechanism includes a crossbeam 71, four swing arms 72, four sliding arms 73, four drive mechanisms 1 74, four drive mechanisms 2 75, and four telescopic cylinders 76. Therefore, the outrigger cylinder assembly 70 in the illustrated scheme includes a total of two crossbeams 71, eight swing arms 72, eight sliding arms 73, eight drive mechanisms 1 74, eight drive mechanisms 2 75, and eight telescopic cylinders 76.

[0038] The main structure of the telescopic cylinder 76 can adopt an existing telescopic cylinder main structure. It is only necessary to provide a connecting frame 761 on the upper part of the existing telescopic cylinder main structure, so that the upper part of the telescopic cylinder 76 is fixedly connected to the end of the sliding arm 73 that is always exposed outside the swing arm 72. In the following description of the technical solution of this application, unless otherwise specified, the telescopic cylinder 76 is assumed to be described in an application scenario using an existing telescopic cylinder main structure. After assembly, the axes of the telescopic cylinder 76 all extend in the vertical direction.

[0039] The crossbeam 71 is fixed to the vehicle body 10 and extends to the front and rear sides of the vehicle body 10 at both ends. Even if the two ends of the crossbeam 71 extend to the front and rear exterior of the vehicle body 10 respectively, they do not extend beyond the front and rear sides of the wheel.

[0040] Four swing arms 72 are evenly distributed at the front and rear ends of the crossbeam 71, and are pivotally matched with the crossbeam 71, so that each swing arm 72 can rotate relative to the crossbeam 71 about a vertical axis. Two swing arms 72 at the same end of the crossbeam 71 are arranged alternately, and can swing relative to the crossbeam 71 to the left side of the left side and the right side of the right side, and can swing to the length extension direction of the crossbeam 71, as shown below. Figure 2 As shown.

[0041] Four sliding arms 73 are matched one-to-one with four swing arms 72, and the two are configured together with a linear slide rail structure. The matching part is close to the free end of the swing arm 72, so that the sliding arm 73 can reciprocate relative to the swing arm 72 in the length direction of the swing arm 72. It is required that a part of the sliding arm 73 can always be kept exposed outside the swing arm 72 and not be covered by the cover plate 722.

[0042] Four drive mechanisms 74 are matched one-to-one with four swing arms 72 and are fixedly installed at the free end of the swing arms 72, and can drive the sliding arm 73 to reciprocate relative to the swing arms 72.

[0043] Four drive mechanisms 75 are matched one-to-one with four swing arms 72 and are fixedly installed at the free end of the crossbeam 71, and can drive the swing arms 72 to rotate relative to the crossbeam 71.

[0044] Four telescopic cylinders 76 are fixedly installed at the free ends of each sliding arm 73, with their axial directions all in the vertical direction, and a support plate 762 is provided at the lower end of the cylinder rod of each telescopic cylinder 76.

[0045] The pivot ends 721 of two swing arms 72 at the same end are respectively close to the left and right sides of the crossbeam 71, and the two swing arms 72 (in the state where the sliding arm 73 is fully retracted) can be rotated to the left side of the left side of the crossbeam 71 and the right side of the right side of the crossbeam 71 respectively, and can simultaneously swing to approximately along the length extension direction of the crossbeam 71, such as... Figure 2 , Figure 5 As shown.

[0046] The aerial work platform vehicle described above features telescopic cylinders 76 located at the four corners of a rectangle. These cylinders can move within a swing angle range of approximately 90 degrees (which can be less than or greater than 90 degrees). They can also be folded and stored in the left and right directions, which helps to reduce the width of the aerial work platform vehicle and facilitates passage through narrow passages. Simultaneously, they can extend and retract along the length of the swing arm 72, which helps to fully expand the positions that the telescopic cylinders 76 can correspond to (enlarge the distribution plane of the telescopic cylinders 76). This allows each telescopic cylinder 76 to be selectively positioned above a relatively flat (work site) surface, ultimately extending downwards to achieve stable support.

[0047] The two exposed ends 711 of the crossbeam 71 are respectively formed with grooves 712. The pivot end 721 of the swing arm 72 is inserted into the groove 712, and the front or rear side and the left or right side of the groove 712 are respectively formed as open structures, so that the swing arm 72 can rotate and swing relative to the exposed end 711 at least within an angular range of close to 90 degrees (preferably set in the range of 80 degrees to 110 degrees).

[0048] A toothed surface 7211 (an incomplete gear structure) is formed on the side of the pivot end 721. Correspondingly, a gear 751 is provided inside the groove portion 712, and the gear 751 meshes with the toothed surface 7211.

[0049] A cover plate 713 is fixedly mounted on the upper part of the exposed end 711 of the crossbeam 70 by bolts, so that the upper end of the pivot shaft of the pivot end 721 can pivotally match the cover plate 713. Similarly, the upper end of the axle of the gear 751 is also pivotally matched with the cover plate 713.

[0050] The second drive mechanism 75 is fixedly mounted on the upper end face of the first cover plate 713, including a drive motor and a gearbox, and the output end of the gearbox is matched with the gear 751 provided in the groove 712, so that power can be transmitted to the gear 751, causing the gear 751 to rotate around the vertical axis, thereby driving the swing arm 72 to rotate relative to the crossbeam 71.

[0051] A stop block 7121 and a stop block 7122 can be provided on the inner bottom surface of the groove portion 712 to limit the swing range of the swing arm 72 relative to the exposed end 711. Figure 3 , Figure 5 As shown, the first stop 7121 is provided on the left open side and the right open side of the groove portion 712, and the second stop 7122 is provided on the front open side and the rear open side of the groove portion 712.

[0052] To ensure that the crossbeam 71 is firmly and reliably connected to the vehicle body 10 as a whole, and that it is not prone to swaying in the front-rear or left-right directions, a vertically extending upright plate 714 can be provided on the crossbeam 71 at the inner side / root of the exposed end 711. The upright plate 714 is fixedly connected to the front and rear sides of the vehicle body 10 as a whole by stud assemblies axially along the front-rear direction. The body of the crossbeam 71 is fixedly connected to the vehicle body 10 as a whole by stud assemblies axially along the vertical direction.

[0053] Multiple vertically extending (upward and downward) protruding pillars 7212 are alternately provided on the outer side (both the upper and lower surfaces or one surface) of the pivot end 721, with the centerlines of these multiple protruding pillars 7212 distributed on the same circumferential surface (centered on the axis of the pivot end 721). Correspondingly, an arc-shaped channel matching the protruding pillars 7212 is provided on the inner bottom surface of the groove portion 712. The ends of each protruding pillar 7212 on the same surface (upper and lower) can be simultaneously inserted into the arc-shaped channel. Figure 5 The illustrated scheme features a plurality of vertically extending protruding pillars 7212 spaced alternately on the outer surface of the pivot end 721, forming a pillar group. The upper ends of each protruding pillar 7212 in this group are inserted into the arc-shaped groove on the lower end face of the cover plate 713. When the swing arm 72 rotates relative to the exposed end 711, at least some of the free ends of the protruding pillars 7212 remain inserted into the arc-shaped groove. This structural design, by using the protruding pillar group to share the load, reduces the adverse effects of the cantilever effect on the swing arm 72, helps improve the stress condition of the swing arm 72, making it less prone to deformation, and thus better ensuring the support stability effect that this application's technical solution aims to achieve.

[0054] A roller can be fitted onto the free end of the protruding post 7212, and the outer circumferential surface of the roller can be made to contact and match the inner wall of the arc-shaped channel to reduce friction and alleviate / delay the wear and tear process.

[0055] A cover plate 722 is detachably fixed to the upper part of the portion of the swing arm 72 that is exposed outside the crossbeam 71.

[0056] Grooves 723 extending along the length of the swing arm 72 are formed on the upper end face of the swing arm 72 and the lower end face of the cover plate 722, respectively. Correspondingly, convex rails 731 that can be matched with the grooves 723 on both sides of the sliding arm 73 are formed on the upper and lower end faces, respectively. By adopting a mating structure in which the convex rails 731 on both sides of the sliding arm 73 are matched with the grooves 723 on the upper end face of the swing arm 72 and the grooves 723 on the lower end face of the cover plate 722, the matching stiffness and strength of the insertion part of the sliding arm 73 and the swing arm 72 can be increased. This helps to ensure that after the sliding arm 73 extends outward relative to the swing arm 72, the rigidity and strength of the (sliding) arm formed by the two remain within a suitable range, which is beneficial to extending the length of the sliding arm 73 outward relative to the swing arm 72.

[0057] To further improve the stiffness and strength of the relative sliding structure established between the sliding arm 73 and the swing arm 72, preferably, the grooved rail portion 723 formed on the upper end face of the swing arm 72 and the grooved rail portion 723 formed on the lower end face of the cover plate 722 are both arranged alternately (in the width direction of the swing arm 72); correspondingly, the convex rail portions 731 formed on the upper and lower sides of the sliding arm 73 are both arranged alternately (in the width direction of the sliding arm 73). When the sliding arm 73 and the swing arm 72 are assembled together, each convex rail portion 731 on the same side (or opposite side) can simultaneously match each grooved rail portion 723.

[0058] The drive mechanism 74 is fixedly mounted on the cover plate 722 and is located relatively close to the outer end of the cover plate 722. A rack portion 732 extending along the length of the slide arm 73 is provided on the upper end face of the slide arm 73, corresponding to the portion below the cover plate 722. The rack portion 732 is located between two convex rail portions 731. The drive mechanism 74 includes a drive motor and a gearbox, and a gear (lower part of the tooth surface) located at the output end of the gearbox can (extend through a vertical through-hole in the cover plate 722 to below the lower end face of the cover plate 722) mesh with the rack portion 732, thereby achieving the purpose of driving the slide arm 73 to slide relative to the rocker arm 72.

[0059] like Figures 6 to 8 As shown, a countersunk hole 7621 is formed at the center of the lower end face of the support leg plate 762, and an annular rubber pad 7622 is fixedly provided at the lower end of the side wall. An auxiliary plate 763 is provided inside the countersunk hole 7621. The radius of the auxiliary plate 763 is 1 / 3 to 2 / 3 of the radius of the support leg plate 762, and preferably in the range close to 1 / 2.

[0060] A second rubber pad 765 is fixedly provided on the lower end face of the auxiliary disk 763. An annular flange is formed on the edge of the second rubber pad 765, and this annular flange surrounds the lower part of the side wall of the auxiliary disk 763. The depth of the countersunk hole 7621 is less than the sum of the thickness of the auxiliary disk 763 and the body thickness of the second rubber pad 765.

[0061] The thickness of the first rubber pad 7622 (or rubber ring) and the thickness of the annular flange of the second rubber pad 765 are both required to be greater than 5mm, preferably greater than 10mm. The thicknesses referred to here are dimensions extending along the axis of the telescopic cylinder 76, i.e., dimensions in the vertical direction.

[0062] The upper part of the auxiliary disk 763 is provided with a plurality of vertically extending guide posts 7631, and elastic elements are respectively fitted on the guide posts 7631. A plurality of through holes corresponding to the guide posts 7631 are distributed on the inner bottom surface of the countersunk portion 7621 on the support leg disk 762. During assembly, the guide posts 7631 are arranged to extend through the through holes to the upper end face of the support leg disk 762. The elastic elements are spring one 7632 and spring two 7633 fitted on the guide posts 7631, with spring one 7632 located inside the countersunk portion 7621 and spring two 7633 located outside the countersunk portion 7621. A nut 7634 is threadedly provided at the upper end of the guide post 7631. The two ends of spring two 7633 contact and match the upper end face of the support leg disk 762 and the lower end face of the nut 7634, respectively. Tightening the nut 7634 can adjust the initial compression state of the second spring 7633, thereby controlling the length of the lower end face of the second rubber pad 765 extending below the lower port of the countersunk hole 7621, or controlling the length of the lower end face of the second rubber pad 765 extending downward relative to the lower end face of the support leg plate 762, and adjusting the relative parallelism between the lower end face of the second rubber pad 765 and the lower end face of the support leg plate 762, so that the two end faces can be in a roughly parallel state.

[0063] After the auxiliary disk 763 is connected to the support disk 762 (i.e., connected as a whole), the elastic element can drive the auxiliary disk 763 to perform elastic reciprocating movement relative to the countersunk hole portion 7621, thereby enabling the lower end of the body of the rubber pad 765 to reciprocate between a state in which it is (fully) extended to the outside of the lower port of the countersunk hole portion 7621 and a state in which it is retracted to the inside of the lower port of the countersunk hole portion 7621.

[0064] The elastic element can apply a downward elastic thrust to the auxiliary disk 763, and in the non-operating state (i.e., without support), a gap 764 is maintained between the opposing surfaces of the auxiliary disk 763 and the countersunk hole 7621. At this time, the lower end face of the second elastic pad 765 is fully extended beyond the lower port of the countersunk hole 7621. In the operating state, the ground of the work site applies an upward thrust to the lower end face of the second rubber pad 765, causing the auxiliary disk 763 to move inward into the countersunk hole 7621, i.e., the lower end of the second rubber pad 765 retracts into the lower port of the countersunk hole 7621. During this process, the elastic element expands and contracts, simultaneously allowing the opposing end faces of the auxiliary disk 763 and the countersunk hole 7621 to contact each other. The thickness of the second rubber pad 765 is compressed and deformed to ensure full contact with the ground. The thickness of the rubber pad 765 is controlled within the range of 3mm to 15mm, preferably within 5mm to 10mm.

[0065] Multiple radial grooves 766 are alternately distributed on the outer peripheral surface of the first rubber pad 7622, ​​and multiple radial grooves 766 are also alternately distributed on the outer peripheral surface of the annular flange of the second rubber pad 765. The radial grooves 766 facilitate easier elastic deformation of the first rubber pad 7622 and the annular flange, allowing for greater and more flexible deformation. This enables the edges of the support leg disc 762 and the auxiliary disc 763 to better adapt to uneven support contact surfaces, forming a stable support contact. In other words, the radial grooves 766 on the first rubber pad 7622 and the annular flange allow the lower outer diameter of the support leg disc 762 and the auxiliary disc 763 to change within a wider range, elastically increasing and decreasing, thus better adapting to uneven work surfaces and improving support stability.

[0066] A groove structure 7651 is formed in the central section of the lower end face of the rubber pad 765 body, and a protrusion structure 7652 is formed on the inner bottom surface of the groove structure 7651. The protrusion structure 7652 contains multiple types of protrusions, and there are multiple of each type of protrusion. The free end faces of the protrusions are all flush with the lower end face of the rubber pad 765 body.

[0067] The same type of convex body is distributed alternately around the circumference in different circumferential intervals. See as follows. Figure 8The illustrated embodiment includes two types of protrusions, each containing multiple protrusions arranged alternately in two circumferential intervals. By providing the groove structure 7651 and the protrusion structure 7652 at the center of the lower end face of the second rubber pad 765, the deformation capacity of the second elastic pad 765 is increased, allowing it to better adapt to uneven contact surfaces and further improving support stability. In particular, when used in conjunction with a scheme where radial grooves 766 are provided on the annular flanges of both the first rubber pad 7622 and the second rubber pad 765, it better facilitates stable and reliable contact support between the auxiliary disc 763 and the ground of the work area, mitigating the adverse effects that the auxiliary disc 763 might have on the support contact between the outrigger disc 762 and the ground of the work area, and improving the (dual) support stability of the telescopic cylinder 76 at both its center and periphery positions.

[0068] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Many aspects of the present invention can be improved without departing from the overall concept. Those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An aerial work platform vehicle, comprising a support leg cylinder assembly (70) mounted on the vehicle body (10); characterized in that, The outrigger cylinder assembly (70) includes at least two support mechanisms arranged alternately on the vehicle body (10); the support mechanisms include: A crossbeam (71) is fixed to the vehicle body (10) and extends to the front and rear sides of the vehicle body (10) at both ends; Multiple swing arms (72) are pivotally provided at least one at each of the front and rear ends of the crossbeam (71), and are able to rotate relative to the crossbeam (71) around the vertical axis; Multiple sliding arms (73) are matched one-to-one with the swing arm (72) and are arranged in a linear slide rail structure on the free end side of the swing arm (72) so that they can move relative to the swing arm (72) in the length extension direction of the swing arm (72); Multiple drive mechanisms (74) are matched one-to-one with the swing arm (72) and are fixedly installed at the end of the swing arm (72), and can drive the sliding arm (73) to slide relative to the swing arm (72); Multiple drive mechanisms (75) are matched one-to-one with the swing arms (72) and are fixedly mounted at the ends of the crossbeam (71), and can drive the swing arms (72) to rotate relative to the crossbeam (71); and Multiple telescopic cylinders (76) are respectively located at the free end of each sliding arm (73), and a support leg plate (762) is provided at the lower end of its cylinder rod. On the support plate (762), a countersunk hole (7621) is provided on the lower end face, and an annular rubber pad (7622) is fixedly provided on the lower end of the side wall; an auxiliary plate (763) is provided inside the countersunk hole (7621); a second rubber pad (765) is fixedly provided on the lower end face of the auxiliary plate (763); an annular flange is formed on the edge of the second rubber pad (765), and the annular flange surrounds the lower part of the side wall of the auxiliary plate (763); the depth of the countersunk hole (7621) is less than the thickness of the auxiliary plate (763) and the thickness of the second rubber pad (765). The sum of the thickness of the main body; the upper part of the auxiliary disk (763) is provided with a plurality of vertically extending guide posts (7631), and an elastic element is sleeved on the guide posts (7631); after the auxiliary disk (763) is connected to the support leg disk (762), the elastic element can drive the auxiliary disk (763) to reciprocate relative to the countersunk hole (7621), thereby allowing the lower end of the rubber pad (765) to change between a state of extending to the outside of the lower port of the countersunk hole (7621) and a state of retracting into the lower port of the countersunk hole (7621); Multiple radial grooves (766) are provided on the outer peripheral surface of rubber pad one (7622), and / or multiple radial grooves (766) are provided on the outer peripheral surface of the annular flange of rubber pad two (765).

2. The aerial work platform vehicle according to claim 1, characterized in that: The support mechanism includes four swing arms (72), which are evenly distributed at both ends of the crossbeam (71). The pivot positions of two swing arms (72) at the same end are close to the left and right sides of the crossbeam (71), respectively, so that the two swing arms (72) can rotate to the left side of the left side and the right side of the right side of the crossbeam (71), respectively.

3. The aerial work platform vehicle according to claim 1 or 2, characterized in that: A groove (712) is formed on the exposed end (711) of the crossbeam (71); the pivot end (721) of the swing arm (72) is inserted into the groove (712), and the front or rear side, as well as the left or right side of the groove (712) are formed as open structures, so that the swing arm (72) can rotate and swing relative to the exposed end (711) within an angle range of at least close to 90 degrees.

4. The aerial work platform vehicle according to claim 3, characterized in that: Multiple vertically extending protruding pillars (7212) are provided alternately on the outer side of the pivot end (721), and the axis of the multiple protruding pillars (7212) is distributed on the same circumferential surface; an arc-shaped channel matching the protruding pillars (7212) is provided on the inner bottom surface of the groove (712); the end of the protruding pillar (7212) can be inserted into the arc-shaped channel.

5. The aerial work platform vehicle according to claim 3, characterized in that: A toothed surface (7211) is provided on the pivot end (721); a gear (751) that can mesh with the toothed surface (7211) is provided inside the groove (712); a cover plate (713) is fixedly provided on the exposed end (711) in a detachable manner; a second drive mechanism (75) is fixedly provided on the upper end face of the cover plate (713); so that the output end of the second drive mechanism (75) can match the gear (751) to achieve the purpose of driving the swing arm (72) to rotate relative to the crossbeam (71).

6. The aerial work platform vehicle according to claim 1, characterized in that: A cover plate 2 (722) is detachably fixed to the upper part of the portion of the swing arm (72) that is exposed outside the crossbeam (71); a groove rail portion (723) extending along the length extension direction of the swing arm (72) is formed on the upper end surface of the swing arm (72) and the lower end surface of the cover plate 2 (722); a convex rail portion (731) that can match the groove rail portion (723) is formed on the upper and lower end surfaces of the sliding arm (73).

7. The aerial work platform vehicle according to claim 6, characterized in that: The grooved rail portion (723) formed on the upper end face of the swing arm (72) and the grooved rail portion (723) formed on the lower end face of the cover plate (722) are both arranged in alternating patterns; the convex rail portion (731) formed on the upper and lower sides of the sliding arm (73) are also arranged in alternating patterns; each convex rail portion (731) can simultaneously match each grooved rail portion (723).

8. The aerial work platform vehicle according to claim 6 or 7, characterized in that: The drive mechanism 1 (74) is fixed on the cover plate 2 (722); a rack part (732) is provided on the slide arm (73); the gear at the output end of the drive mechanism 1 (74) can mesh with the rack part (732) and drive the slide arm (73) to slide relative to the swing arm (72).

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