Stabilizer device, undercarriage and aerial work platform

Abstract

The application provides a support leg device, a chassis and an aerial work machine. The support leg device comprises a support leg mechanism, a sliding mechanism and a scissor-type telescopic jib. The support leg mechanism comprises a fixed support leg and a telescopic support leg arranged in a telescopic manner. The fixed support leg is provided with a first sliding groove. The sliding mechanism comprises a driving sliding block movably connected to the first sliding groove and a transmission connection assembly transmissionally connected between the telescopic support leg and the driving sliding block. The transmission connection assembly is used for converting the telescoping force of the telescopic support leg into the driving force of the driving sliding block sliding in the first sliding groove. The scissor-type telescopic jib comprises a fixed arm section and a driving arm section arranged in a cross manner. The fixed arm section is fixedly connected to the fixed support leg. The driving arm section is fixedly connected to the driving sliding block. The support leg device provided by the application can realize the horizontal telescoping action and the vertical telescoping action of the support leg device by using only one set of driving oil cylinders. Meanwhile, the horizontal telescoping action and the vertical telescoping action can be performed synchronously, which greatly improves the unfolding and contraction efficiency of the support leg device.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aerial work machinery, and particularly relates to a support leg device, a chassis and an aerial work machinery. BACKGROUND

[0002] In order to overcome the overturning moment and increase the stability of work, a support leg device is generally arranged on the aerial work platform when the aerial work platform is working. The support leg device on the existing aerial work platform mainly comprises horizontal telescopic support legs and vertical telescopic support legs. The horizontal telescopic support legs and the vertical telescopic support legs are respectively driven to move by horizontal telescopic oil cylinders and vertical telescopic oil cylinders. When the support leg device is in action, the horizontal telescopic support legs are first driven by the horizontal telescopic oil cylinders to horizontally expand to a preset position, and then the vertical telescopic support legs are driven by the vertical telescopic oil cylinders to be in abutment with the ground. The support of the expanded horizontal telescopic support legs and the vertical telescopic support legs can improve the anti-overturning moment capacity of the aerial work platform. However, the two groups of oil cylinders are sequentially driven when the support leg device of this type is in action. The efficiency is low, and the increase in the number of oil cylinders increases the complexity of the hydraulic system, which increases the instability of the hydraulic system. SUMMARY

[0003] In view of the above defects or deficiencies, the present application provides a support leg device, a chassis and an aerial work machinery, which aims to solve the technical problems of low action efficiency and poor stability of the support leg device on the existing aerial work platform.

[0004] To achieve the above-mentioned purpose, the present application provides a support leg device, which comprises a support leg mechanism, a sliding mechanism and a scissor-type telescopic arm frame. The support leg mechanism comprises a fixed support leg provided with a telescopic cavity and a telescopic support leg telescopically arranged in the telescopic cavity. The fixed support leg is provided with a first sliding groove. The sliding mechanism comprises a driving sliding block movably connected in the first sliding groove and a transmission connection assembly transmissionally connected between the telescopic support leg and the driving sliding block. The transmission connection assembly is used for converting the telescoping force of the telescopic support leg into the driving force of the driving sliding block sliding in the first sliding groove. The scissor-type telescopic arm frame comprises a fixed arm section and a driving arm section arranged in cross. The fixed arm section is fixedly connected with the fixed support leg, and the driving arm section is fixedly connected with the driving sliding block.

[0005] In the embodiment of the present application, a second sliding groove extending along the telescoping direction is arranged on the side wall of the fixed support leg. The second sliding groove is in communication with the telescopic cavity in the groove depth direction. A first guide rail extending along the telescoping direction is arranged on the side wall of the second sliding groove. The transmission connection assembly comprises a sliding buckle seat connected with the first guide rail, a buckle capable of detachably buckling with the sliding buckle seat, and a traction steel wire rope having two ends connected with the sliding buckle seat and the driving sliding block. One end of the buckle extends into the telescopic cavity and is fixedly connected with the telescopic support leg.

[0006] In the embodiment of the present application, the side wall of the second chute is further provided with a second guide rail parallel to the first guide rail in the direction of the groove depth, the second guide rail is located on the inner side of the first guide rail and is provided with a transition slope gradually approaching the first guide rail on the abutting surface of the first guide rail, the bottom of the buckle seat is provided with a hollow buckle cavity, the buckle includes a connecting part extending into the telescopic cavity and fixedly connected with the telescopic leg, and a clamping part hingedly arranged on the connecting part, the clamping part abuts on the abutting surface and is provided with a buckling part at the outer end for buckling with the hollow buckle cavity.

[0007] In the embodiment of the present application, the length of the second guide rail is greater than that of the first guide rail and includes a superposition part superposed and aligned with the first guide rail in the direction of the groove depth and an extension part extending out of the first guide rail and extending towards the telescopic leg, and a transition slope is arranged between the superposition part and the extension part.

[0008] In the embodiment of the present application, the first guide rail is further provided with a locking buckle aligned with the transition slope in the direction of the groove depth and provided with a locking hole, and the buckle seat is provided with a locking assembly for detachable buckling with the locking hole.

[0009] In the embodiment of the present application, the locking assembly includes a sliding lock piece, a first guide seat, a second guide seat and a tension spring, the first guide seat and the second guide seat are arranged on the top of the buckle seat in a spaced manner and are provided with a first guide hole and a second guide hole aligned in the direction of the groove width, the sliding lock piece movably penetrates the first guide hole and the second guide hole and has an extension end extending out of the first guide hole, the extension end is used for extending into the locking hole, and the tension spring is connected between the first guide seat and the sliding lock piece in a pre-tensioned state.

[0010] In the embodiment of the present application, the sliding lock piece is further provided with a driving cavity penetratingly arranged and communicating with the hollow buckle cavity, the driving cavity is provided with a protruding driving part near the second guide seat, the locking assembly further includes a spring bottom plate, a compression spring and a wedge-shaped block, the wedge-shaped block is arranged in the driving cavity and the wedge-shaped surface abuts against the driving part, and the spring bottom plate is movably arranged in the hollow buckle cavity and connected with the wedge-shaped block through the tension spring.

[0011] In the embodiment of the present application, a torsional spring is further arranged on the hinge shaft between the connecting part and the clamping part, and the torsional spring is used for torsioning the clamping part to tightly abut against the abutting surface.

[0012] In the embodiment of the present application, the first chute extends in the telescopic direction, the transmission connection assembly further includes an upper roller assembly and a lower roller assembly arranged on the fixed leg and located on both sides of the telescopic direction of the driving slider, and the traction steel wire rope includes an upper traction part and a lower traction part, the upper traction part is wound on the upper roller assembly and the two ends are respectively connected with the upper end of the buckle seat and the upper end of the driving slider, and the lower traction part is wound on the lower roller assembly and the two ends are respectively connected with the lower end of the buckle seat and the lower end of the driving slider.

[0013] In the embodiment of the present application, the upper roller assembly and the lower roller assembly are identical in structure and each comprises a support seat arranged on the fixed leg and a sliding roller rotatably arranged on the support seat, and the sliding roller is used for winding the traction steel wire rope.

[0014] In the embodiment of the present application, a driving oil cylinder is arranged in the telescopic cavity, one end of the driving oil cylinder is hinged to the fixed leg, and the other end of the driving oil cylinder is fixedly connected to the telescopic leg.

[0015] In the embodiment of the present application, the leg device further comprises a support linkage mechanism, the support linkage mechanism comprises a first support linkage and a second support linkage which are sequentially hinged, and a limiting baffle is arranged on the hinged end of the first support linkage or the second support linkage, the limiting baffle is used for limiting and locking the first support linkage and the second support linkage when the first support linkage and the second support linkage are rotated to the limit angle.

[0016] To achieve the above-mentioned purpose, the present application further provides a chassis, wherein the chassis comprises the leg device according to the above-mentioned and a chassis body, the scissor-type telescopic jib of the leg device is horizontally connected to the chassis body, and the leg mechanism is vertically arranged on the scissor-type telescopic jib.

[0017] To achieve the above-mentioned purpose, the present application further provides a high-altitude operation machine, wherein the high-altitude operation machine comprises the above-mentioned chassis.

[0018] Through the above technical solution, the leg device provided by the embodiment of the present application has the following beneficial effects:

[0019] After the outrigger device is assembled on the chassis body, the scissor-type telescopic jib is arranged transversely on the chassis body as a horizontal stretching component, and the outrigger mechanism is arranged vertically on the scissor-type telescopic jib as a support component supporting the ground. Since the transmission connection assembly is transmissionally connected between the telescopic outrigger and the driving slider and can convert the telescating force of the telescopic outrigger into the driving force of the driving slider sliding in the first sliding groove, and the fixed arm section of the scissor-type telescopic jib is fixedly connected with the fixed outrigger, and the driving arm section is fixedly connected with the driving slider, when the outrigger device needs to be unfolded, only the telescopic outrigger needs to be controlled to vertically extend, and the telescopic outrigger drives the driving slider to slide in the first sliding groove through the transmission of the transmission connection assembly in the process of extension, and the sliding of the driving slider drives the driving arm section of the scissor-type telescopic jib to move, so that the scissor-type telescopic jib is horizontally unfolded. Similarly, when the outrigger device needs to be folded, only the telescopic outrigger needs to be controlled to retract. The telescating action of the telescopic outrigger only needs to be driven and controlled by one group of driving oil cylinders. In summary, the outrigger device provided by the application can realize the horizontal telescating action and the vertical telescating action of the outrigger device only by one group of driving oil cylinders, compared with the driving mode of the two groups of oil cylinders driving respectively, not only simplifies the hydraulic control system and improves the stability of the hydraulic control system, but also can simultaneously perform the horizontal telescating action and the vertical telescating action when the outrigger device is unfolded or folded, greatly improving the unfolding and folding efficiency of the outrigger device.

[0020] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and serve to explain the principles of the application. In the drawings:

[0022] Figure 1 is a structural schematic view of the outrigger device according to an embodiment of the application;

[0023] Figure 2 is a partial structural schematic view of the outrigger mechanism according to a first perspective of an embodiment of the application;

[0024] Figure 3 is a partial structural schematic view of the outrigger mechanism according to a second perspective of an embodiment of the application;

[0025] Figure 4 is a structural schematic view of the buckle and the sliding buckle seat before, during and after buckling according to an embodiment of the application;

[0026] Figure 5 is a structural schematic view of one of the perspectives of the cooperation of the buckle and the sliding buckle seat according to an embodiment of the application;

[0027] Figure 6 is a structural schematic view of the slide buckle seat and the locking assembly according to an embodiment of the present application from one perspective;

[0028] Figure 7 is a structural schematic view of the slide buckle seat and the locking assembly according to an embodiment of the present application from another perspective;

[0029] Figure 8 is a structural schematic view of the upper roller assembly according to an embodiment of the present application;

[0030] Figure 9 is a structural schematic view of the chassis in a contracted state according to an embodiment of the present application;

[0031] Figure 10 is a structural schematic view of the chassis in an expanded state according to an embodiment of the present application.

[0032] Legend of reference signs

[0033] DETAILED DESCRIPTION

[0034] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0035] The outrigger device of the present application is described below with reference to the accompanying drawings.

[0036] As shown in Figure 1 , Figure 2 and Figure 9 , the present application provides an outrigger device, wherein the outrigger device comprises:

[0037] an outrigger mechanism 1 comprising a fixed outrigger 11 provided with a telescopic cavity and a telescopic outrigger 12 telescopically arranged in the telescopic cavity, the fixed outrigger 11 being provided with a first sliding groove 13;

[0038] a sliding mechanism comprising a driving sliding block 21 movably clamped in the first sliding groove 13 and a transmission connection assembly 22 transmissionally connected between the telescopic outrigger 12 and the driving sliding block 21, the transmission connection assembly 22 being configured to convert the telescopic force of the telescopic outrigger 12 into a driving force for the driving sliding block 21 to slide in the first sliding groove 13; and

[0039] a scissor-type telescopic jib 3 comprising a fixed arm segment 31 and a driving arm segment 32 arranged in cross, the fixed arm segment 31 being fixedly connected with the fixed outrigger 11, and the driving arm segment 32 being fixedly connected with the driving sliding block 21.

[0040] After the outrigger assembly is mounted on the chassis body 7, the scissor-type telescopic boom 3 will be arranged laterally on the chassis body 7 as a horizontal extension component, and the outrigger mechanism 1 will be arranged vertically on the scissor-type telescopic boom 3 as a ground-supporting component. Since the transmission connection assembly 22 is connected between the telescopic outrigger 12 and the drive slider 21, it can convert the telescopic force of the telescopic outrigger 12 into the driving force for the drive slider 21 to slide within the first slide groove 13. The fixed boom section 31 of the scissor-type telescopic boom 3 is fixedly connected to the fixed outrigger 11, and the drive boom section 32 is connected to the drive slider 21. The outriggers are fixedly connected, so when the outriggers need to be deployed, only the telescopic outrigger 12 needs to be vertically extended. During the extension process, the telescopic outrigger 12 drives the drive slider 21 to slide within the first slide groove 13 via the transmission connection assembly 22. The sliding of the drive slider 21 then drives the drive arm section 32 of the scissor telescopic boom 3 to move together, thereby achieving the horizontal extension of the scissor telescopic boom 3. Similarly, when the outriggers need to be retracted, only the telescopic outrigger 12 needs to be retracted. The telescopic action of the telescopic outrigger 12 only requires one set of drive cylinders for control. In summary, the outriggers provided by this invention only require one set of drive cylinders to achieve both horizontal and vertical telescopic actions. Compared to the current driving method that uses two sets of cylinders to drive separately, this not only simplifies the hydraulic control system and improves its stability, but also allows the horizontal and vertical telescopic actions to be performed simultaneously during deployment or retraction, greatly improving the deployment and retraction efficiency of the outriggers.

[0041] It should be noted that the extension direction of the first slide groove 13 is preferably along the telescopic direction, which refers to the telescopic direction of the telescopic outrigger 12. When the outrigger device is assembled on the chassis body 7, the telescopic direction coincides with the vertical direction. The telescopic outrigger 12 being telescopically positioned within the telescopic cavity means that one end of the telescopic outrigger 12 extends into the telescopic cavity and can slide telescopically within it. A drive cylinder can be provided between the telescopic outrigger 12 and the fixed outrigger 11 to drive and control the telescopic outrigger 12's extension and retraction.

[0042] like Figure 2 , Figure 3 and Figure 4As shown, in an embodiment of the present invention, the transmission connection assembly 22 can be arranged in the form of a traction steel wire rope 25. Specifically, a second slide groove 14 extending in the telescopic direction is provided on the side wall of the fixed support leg 11. The second slide groove 14 communicates with the telescopic cavity in the groove depth direction. A first guide rail 15 extending in the telescopic direction is provided on the side wall of the second slide groove 14. The transmission connection assembly 22 includes a sliding buckle seat 23 that is snapped onto the first guide rail 15, a buckle 24 that can be detachably snapped onto the sliding buckle seat 23, and a traction steel wire rope 25 whose two ends are respectively connected to the sliding buckle seat 23 and the drive slider 21. One end of the buckle 24 extends into the telescopic cavity and is fixedly connected to the telescopic support leg 12. By configuring the second slide groove 14 to communicate with the telescopic cavity in the groove depth direction, one end of the buckle 24 can extend from the second slide groove 14 into the telescopic cavity and be fixedly connected to the telescopic outrigger 12 placed in the telescopic cavity, while the other end of the buckle 24 can be detachably fastened to the sliding buckle seat 23. Through the fastening and engagement of the sliding buckle seat 23 and the buckle 24, the telescopic outrigger 12 can move together with the buckle 24 and the sliding buckle seat 23 in the second slide groove 14 when it is telescopic. Since the two ends of the traction wire rope 25 are respectively connected to the sliding buckle seat 23 and the drive slider 21, when the sliding buckle seat 23 moves, it will pull the drive slider 21 to slide in the first slide groove 13 through the traction wire rope 25, thereby realizing the horizontal telescopic action of the scissor telescopic boom 3. It should be noted that, in order to ensure the tension of the traction wire rope 25 and to facilitate changing the force direction of the traction wire rope 25, the traction wire rope 25 can be used in conjunction with pulleys when it is arranged. The groove depth direction mentioned above refers to the groove depth direction of the second groove 14, which is perpendicular to the extension and contraction direction.

[0043] In embodiments of the present invention, the transmission connection component 22 may be arranged in other ways, such as by connecting a support rod to realize the transmission between the telescopic leg 12 and the drive slider 21, or by directly setting the drive slider 21 to be connected to the telescopic leg 12.

[0044] like Figure 2 , Figure 4 and Figure 7As shown, in an embodiment of the present invention, the side wall of the second slide groove 14 is also provided with a second guide rail 16 that is parallel to the first guide rail 15 in the groove depth direction. The second guide rail 16 is located inside the first guide rail 15 and has a transition slope 161 that gradually approaches the first guide rail 15 on the abutment surface facing the first guide rail 15. The bottom of the sliding buckle seat 23 is provided with a hollow fastening cavity 231. The buckle 24 includes a connecting part 241 that extends into the telescopic cavity and is fixedly connected to the telescopic support leg 12, and a snap-fit ​​part 242 that is hinged to the connecting part 241. The snap-fit ​​part 242 abuts against the abutment surface and has a snap-fit ​​part 243 at its outer end for fastening with the hollow fastening cavity 231. Specifically, the abutment surface is formed on the second guide rail 16 and is located on the side facing the first guide rail 15. The abutment surface can be divided into a first abutment surface and a second abutment surface. The second abutment surface is closer to the first guide rail 15 than the first abutment surface. A transition slope 161 is provided between the first abutment surface and the second abutment surface. The buckle 24 is located inside the sliding buckle seat 23 and the snap-fit ​​part 242 abuts against the abutment surface. When the buckle 24 moves from the first abutment surface to the transition slope 161, as the transition slope 161 gradually moves closer to the first guide rail 15, the snap-fit ​​part 242 and the fastening part 243 abutting against the transition slope 161 gradually lift up. The lifted fastening part 243 will gradually extend into the hollow fastening cavity 231 until it is completely fastened with the sliding buckle seat 23. When the buckle 24 moves on the second abutment surface, the fastening part 243 and the sliding buckle seat 23 are always in the fastened state. When it is necessary to separate the buckle 24 from the sliding seat 23, it is only necessary to control the buckle 24 to move from the second abutment surface to the first abutment surface. That is, the support leg device in this invention achieves automatic engagement and disengagement of the buckle 24 and the sliding seat 23 by setting the first abutment surface, the second abutment surface, and the transition slope 161 on the second guide rail 16. It should be noted that the first guide rail 15 is generally provided with a limiting structure at the transition slope 161. The limiting structure is mainly used to limit the sliding seat 23 to ensure that the sliding seat 23 can stay at the position of the transition slope 161 after separating from the buckle 24. Thus, when the buckle 24 and the sliding seat 23 need to be engaged again, it is convenient for the buckle 24 to align with the hollow engagement cavity 231. It should be noted that the above-mentioned inside and outside refer to the side closer to the telescopic cavity in the groove depth direction as inside and the side closer to the groove opening as outside.

[0045] like Figure 1 , Figure 2 and Figure 4As shown, in an embodiment of the present invention, the second guide rail 16 is longer than the first guide rail 15 and includes a overlapping portion 162 that overlaps and aligns with the first guide rail 15 in the groove depth direction, and an extension portion 163 that extends beyond the first guide rail 15 and toward the telescopic support leg 12. A transition slope 161 is provided between the overlapping portion 162 and the extension portion 163. Specifically, a first abutting surface is provided on the extension portion 163, a second abutting surface is provided on the overlapping portion 162, and the overlapping portion 162 is provided closer to the first guide rail 15. By providing the overlapping portion 162 and the extension portion 163, segmented movements of the horizontal telescopic movement and the vertical telescopic movement of the support leg device are realized. Specifically, the segmented movement can be divided into a synchronous extension stage and a support extension stage. In the synchronous extension stage, the outrigger device gradually unfolds from its initial retracted state, and the telescopic outrigger 12 gradually extends. The extension of the telescopic outrigger 12 will drive the buckle 24 to move from the overlapping part 162 to the transition slope 161. On the overlapping part 162, the buckle 24 and the sliding buckle seat 23 are in a latching state. The movement of the buckle 24 will drive the sliding buckle seat 23 and the drive slider 21 to move together, thereby realizing the synchronous unfolding of the telescopic outrigger 12 and the scissor telescopic boom 3. When the buckle 24 moves to the transition slope 161, the buckle 24 and the sliding buckle seat 23 gradually separate, and the segmented movement transitions from the synchronous extension stage to the support extension stage. At this time, the scissor telescopic boom 3 has been extended to its limit position and has stopped unfolding, while the telescopic outrigger 12 continues to extend and drives the buckle 24 to move on the extension part 163 until the telescopic outrigger 12 comes into contact with the ground. The segmented motion design allows the scissor-type telescopic boom 3 to extend horizontally to its position first when the outrigger device is deployed, and then the telescopic outrigger 12 contacts the ground. When the outrigger device is retracted, the telescopic outrigger 12 first leaves the ground, and then the telescopic outrigger 12 and the scissor-type telescopic boom 3 retract synchronously. The advantage of this design is that it ensures the vertical force on the telescopic outrigger 12 when the outrigger device is deployed, and avoids ground obstacles from restricting the horizontal telescopic movement when the outrigger device is retracted. At the same time, the synchronous telescopic phase design can increase the deployment and retraction efficiency of the outrigger device.

[0046] like Figure 4 and Figure 5 As shown, in an embodiment of the present invention, the first guide rail 15 is further provided with a locking buckle 4. The locking buckle 4 is aligned with the transition slope 161 in the groove depth direction and is provided with a locking hole 41. The sliding buckle seat 23 is provided with a locking component 5 for detachably engaging with the locking hole 41. That is, the aforementioned limiting structure for the sliding buckle seat 23 is the locking buckle 4. The locking buckle 4 being located at the transition slope 161 means that the locking buckle 4 is located on the side of the first guide rail 15 and aligned with the transition slope 161 in the groove depth direction. By providing the locking buckle 4, the sliding buckle seat 23 can be locked and fixed at the transition slope 161 after the transition slope 161 is disengaged from the buckle 24. This facilitates the alignment of the buckle 24 with the hollow engagement cavity 231 when the buckle 24 needs to engage with the sliding buckle seat 23 next time.

[0047] like Figure 6 and Figure 7 As shown, in an embodiment of the present invention, the locking assembly 5 may include a sliding lock fastener 51, a first guide seat 52, a second guide seat 53, and a tension spring 54. The first guide seat 52 and the second guide seat 53 are spaced apart on the top of the sliding buckle seat 23 and are provided with a first guide hole and a second guide hole aligned in the groove width direction. The sliding lock fastener 51 is movably inserted into the first guide hole and the second guide hole, with one end being an extension end 511 extending out of the first guide hole. The extension end 511 is used to extend into the locking hole 41. The tension spring 54 is pre-stretched and connected between the first guide seat 52 and the sliding lock fastener 51. The tension spring 54 allows the extension end 511 of the sliding lock fastener 51 to automatically extend out of the first guide hole, thereby facilitating its engagement with the locking hole 41 of the locking buckle 4. The movable arrangement of the sliding lock fastener 51 ensures that the extension end 511 can be pushed into the first guide hole, thereby facilitating the release of the locking between the sliding buckle seat 23 and the locking buckle 4. In other words, this invention facilitates the quick locking and unlocking of the sliding lock fastener 51 and the locking buckle 4 by movably inserting the sliding lock fastener 51 through the first guide hole and the second guide hole, and by providing a tension spring 54 between the first guide seat 52 and the sliding lock fastener 51. Of course, the tension spring 54 can also be provided on the second guide seat 53. In this case, the tension spring 54 needs to be in a pre-compressed state, and the first guide hole and the second guide hole can be equivalently replaced by a guide groove.

[0048] like Figure 6 and Figure 7As shown, in an embodiment of the present invention, the sliding lock fastener 51 is further provided with a drive cavity 512 that is through and communicates with the hollow fastening cavity 231. The drive cavity 512 is provided with a protruding drive part 513 on the side near the second guide seat 53. The locking assembly 5 also includes a spring base plate 55, a compression spring 56 and a wedge block 57. The wedge block 57 is disposed in the drive cavity 512 and the wedge surface abuts against the drive part 513. The spring base plate 55 is movably disposed in the hollow fastening cavity 231 and connected to the wedge block 57 through a tension spring 54. When designing the locking assembly 5, it is necessary to ensure that the sliding buckle seat 23 can automatically lock when the buckle 24 disengages from the sliding buckle seat 23, and that the sliding buckle seat 23 can automatically disengage from the locking buckle 4 after the buckle 24 and the sliding buckle seat 23 are engaged. This is necessary to ensure the automatic execution of segmented actions. Taking the above implementation as an example, the automatic extension of the protruding end 511 can be achieved by a pre-stretched tension spring 54. To achieve the automatic retraction of the protruding end 511, a drive cavity 512, a spring base plate 55, a compression spring 56, and a wedge block 57 are provided. When the engaging part 243 of the latch 24 extends into the hollow engaging cavity 231 of the sliding latch seat 23, because the force of the hydraulic cylinder is much greater than the spring force of the tension spring 54, the engaging part 243 will move to the bottom of the spring base plate 55 and push the spring base plate 55 upward. The upward movement of the spring base plate 55 will then push the wedge block 57 upward. Since the wedge-shaped surface of the wedge block 57 abuts against the driving part 513, the upward movement of the wedge block 57 will push the protruding end 511 to retract, thereby realizing the separation of the sliding lock fastener 51 from the locking latch 4. The purpose of setting the compression spring 56 is to prevent the engaging part 243 from directly and rigidly impacting the wedge block 57 and causing structural damage. Of course, the extension and retraction control of the protruding end 511 can also be achieved by other means, such as hydraulic control.

[0049] like Figure 4 and Figure 5 As shown, in an embodiment of the present invention, a torsion spring 244 is also provided on the hinge shaft between the connecting part 241 and the snap-fit ​​part 242. The torsion spring 244 is used to twist the snap-fit ​​part 242 to make it tightly abut against the abutting surface. By providing the torsion spring 244, the snap-fit ​​part 242 can always be tightly fitted against the abutting surface, thereby facilitating the design of the alignment position between the buckle 24 and the hollow fastening cavity 231.

[0050] like Figure 2As shown, in an embodiment of the present invention, the first slide groove 13 extends along the telescopic direction, and the transmission connection assembly further includes an upper roller assembly 26 and a lower roller assembly 27 disposed on the fixed support leg 11 and located on both sides of the telescopic direction of the drive slider 21. The traction wire rope 25 includes an upper traction part 251 and a lower traction part 252. The upper traction part 251 is wound around the upper roller assembly 26 and its two ends are respectively connected to the upper end of the sliding buckle seat 23 and the upper end of the drive slider 21. The lower traction part 252 is wound around the lower roller assembly 27 and its two ends are respectively connected to the lower end of the sliding buckle seat 23 and the lower end of the drive slider 21. The upper roller assembly 26 and the lower roller assembly 27 are mainly used to ensure the tension of the traction wire rope 25 and to change the direction of the tension in the traction wire rope 25. When the sliding buckle seat 23 moves upward, the lower traction part 252 pulls the drive slider 21 downward, thereby realizing the retraction of the scissor telescopic boom 3. At the same time, the downward movement of the drive slider 21 will tighten the upper traction part 251. Similarly, when the sliding buckle seat 23 moves downward, the upper traction part 251 pulls the drive slider 21 upward and tightens the lower traction part 252. That is, no matter how the sliding buckle seat 23 and the drive slider 21 move, the traction wire rope 25 is always in a taut state.

[0051] like Figure 8 As shown in the embodiment of the present invention, the upper roller assembly 26 and the lower roller assembly 27 have the same structure and both include a support base 271 disposed on the fixed support leg 11 and a sliding wheel 272 rotatably disposed on the support base 271. The sliding wheel 272 is used for winding the traction wire rope 25. The support base 271 is mainly used to facilitate the installation of the sliding wheel 272, and the sliding wheel 272 is mainly used to change the direction of the tension of the traction wire rope 25 and facilitate the movement of the traction wire rope 25.

[0052] In an embodiment of the invention, a drive cylinder is provided inside the telescopic cavity. One end of the drive cylinder is hinged to the fixed support leg 11, and the other end is fixedly connected to the telescopic support leg 12. Specifically, the end of the telescopic support leg 12 that extends into the telescopic cavity also has a hollow cavity, which communicates with the telescopic cavity. The drive cylinder is disposed inside the telescopic cavity and hinged to the cavity wall of the telescopic cavity via a connecting seat. The other end extends into the hollow cavity and is fixedly connected to the telescopic support leg 12. By hingedly configuring the drive cylinder, when the telescopic support leg 12 abuts against uneven ground, the drive cylinder can adaptively rotate, avoiding the drive cylinder from bearing lateral force and thus protecting the cylinder piston. It should be noted that the purpose of providing the fixed support leg 11 and the telescopic support leg 12 is to reduce the lateral load on the drive cylinder and increase its service life. That is, during use, most of the lateral force from the ground on the telescopic support leg 12 is transferred to the fixed support leg 11.

[0053] In an embodiment of the present invention, a sliding sleeve may be provided on the outer side of the telescopic outrigger 12 and the inner wall of the telescopic cavity. The sliding sleeve may be made of a self-lubricating non-metallic material. By providing the sliding sleeve, the friction between the telescopic outrigger 12 and the fixed outrigger 11 can be reduced, and the lateral separation between the telescopic outrigger 12 and the fixed outrigger 11 can be buffered.

[0054] like Figure 1 , Figure 9 and Figure 10 As shown, in an embodiment of the present invention, the outrigger device further includes a support linkage mechanism 6. The support linkage mechanism 6 includes a first support link 61 and a second support link 62 that are hinged in sequence. A limiting baffle 63 is provided on the hinged end of the first support link 61 or the second support link 62. The limiting baffle 63 is used to limit and lock the first support link 61 and the second support link 62 when they rotate to their limit angle. Specifically, the first support rod is connected to the fixed outrigger 11, and the second support rod is connected to the chassis. When the scissor telescopic boom 3 is deployed, the first support link 61 and the second support link 62 will be extended accordingly, and the reaction force of the ground on the outrigger mechanism 1 will be transmitted to the chassis body 7. The limiting baffle 63 is mainly used to ensure that the angle between the first support link 61 and the second support link 62 is always less than the limit angle, which is generally 180°. Within the limit angle, there will be no dead point between the first support link 61 and the second support link 62, thus facilitating the retraction of the first support link 61 and the second support link 62.

[0055] like Figure 9 and Figure 10 As shown, to achieve the above objectives, the present invention also provides a chassis, wherein the chassis includes the outrigger device described above and a chassis body 7, wherein the scissor-type telescopic boom 3 of the outrigger device is horizontally connected to the chassis body 7, and the outrigger mechanism 1 is vertically arranged on the scissor-type telescopic boom 3. Since the chassis adopts all the technical solutions of the above embodiments, it at least has the beneficial effects brought about by the above embodiments, which will not be elaborated further here.

[0056] To achieve the above objectives, the present invention also provides an aerial work platform, wherein the aerial work platform includes the chassis described above. Since the aerial work platform adopts all the technical solutions of the above embodiments, it at least has the beneficial effects brought about by the above embodiments, and will not be described in detail here. In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A support leg device, characterized in that, The outrigger device includes: The outrigger mechanism (1) includes a fixed outrigger (11) with a telescopic cavity and a telescopic outrigger (12) telescopically disposed in the telescopic cavity. The fixed outrigger (11) is provided with a first sliding groove (13). The sliding mechanism includes a drive slider (21) that is movably engaged within the first slide groove (13) and a transmission connection assembly (22) that is driveably connected between the telescopic leg (12) and the drive slider (21). The transmission connection assembly (22) is used to convert the telescopic force of the telescopic leg (12) into a driving force for the drive slider (21) to slide within the first slide groove (13). The scissor telescopic boom (3) includes a fixed boom section (31) and a drive boom section (32) arranged in a cross configuration. The fixed boom section (31) is fixedly connected to the fixed outrigger (11), and the drive boom section (32) is fixedly connected to the drive slider (21). The side wall of the fixed support leg (11) is provided with a second sliding groove (14) extending in the telescopic direction. The second sliding groove (14) communicates with the telescopic cavity in the groove depth direction. The side wall of the second sliding groove (14) is provided with a first guide rail (15) extending in the telescopic direction. The transmission connection assembly includes a sliding buckle seat (23) snapped onto the first guide rail (15), a buckle (24) that can be detachably snapped onto the sliding buckle seat (23), and a traction steel wire rope (25) with its two ends respectively connected to the sliding buckle seat (23) and the drive slider (21). One end of the buckle (24) extends into the telescopic cavity and is fixedly connected to the telescopic support leg (12). The second slide groove (14) is also provided with a second guide rail (16) that is parallel to the first guide rail (15) in the groove depth direction. The second guide rail (16) is located inside the first guide rail (15) and has a transition slope (161) that gradually approaches the first guide rail (15) on the abutting surface facing the first guide rail (15). The bottom of the slide buckle seat (23) is provided with a hollow fastening cavity (231). The buckle (24) includes a connecting part (241) that extends into the telescopic cavity and is fixedly connected to the telescopic support leg (12) and a snap-fit ​​part (242) that is hinged to the connecting part (241). The snap-fit ​​part (242) abuts against the abutting surface and has a fastening part (243) at its outer end for fastening with the hollow fastening cavity (231). The second guide rail (16) is longer than the first guide rail (15) and includes a overlapping portion (162) that overlaps and aligns with the first guide rail (15) in the groove depth direction and an extension portion (163) that extends beyond the first guide rail (15) and toward the telescopic support leg (12). The transition slope (161) is provided between the overlapping portion (162) and the extension portion (163).

2. The outrigger device according to claim 1, characterized in that, The first guide rail (15) is also provided with a locking buckle (4), which is aligned with the transition slope (161) in the groove depth direction and has a locking hole (41). The sliding buckle seat (23) is provided with a locking component (5) for detachably engaging with the locking hole (41).

3. The outrigger device according to claim 2, characterized in that, The locking assembly (5) includes a sliding lock fastener (51), a first guide seat (52), a second guide seat (53), and a tension spring (54). The first guide seat (52) and the second guide seat (53) are spaced apart on the top of the sliding buckle seat (23) and are provided with a first guide hole and a second guide hole aligned in the groove width direction. The sliding lock fastener (51) is movably inserted into the first guide hole and the second guide hole, and one end is an extension end (511) extending out of the first guide hole. The extension end (511) is used to extend into the locking hole (41). The tension spring (54) is in a pre-stretched state and connected between the first guide seat (52) and the sliding lock fastener (51).

4. The outrigger device according to claim 3, characterized in that, The sliding lock fastener (51) is also provided with a drive cavity (512) that is through and communicates with the hollow fastening cavity (231). The drive cavity (512) has a protruding drive part (513) on the side near the second guide seat (53). The locking assembly (5) also includes a spring base plate (55), a compression spring (56) and a wedge block (57). The wedge block (57) is disposed in the drive cavity (512) and the wedge surface abuts against the drive part (513). The spring base plate (55) is movably disposed in the hollow fastening cavity (231) and connected to the wedge block (57) through the tension spring (54).

5. The outrigger device according to claim 1, characterized in that, A torsion spring is also provided on the hinge shaft between the connecting part (241) and the snap-fit ​​part (242), the torsion spring being used to twist the snap-fit ​​part (242) to make it tightly abut against the abutting surface.

6. The outrigger device according to claim 1, characterized in that, The first slide groove (13) extends along the telescopic direction. The transmission connection assembly also includes an upper roller assembly (26) and a lower roller assembly (27) disposed on the fixed support leg (11) and located on both sides of the telescopic direction of the drive slider (21). The traction wire rope (25) includes an upper traction part (251) and a lower traction part (252). The upper traction part (251) is wound around the upper roller assembly (26) and its two ends are respectively connected to the upper end of the sliding buckle seat (23) and the upper end of the drive slider (21). The lower traction part (252) is wound around the lower roller assembly (27) and its two ends are respectively connected to the lower end of the sliding buckle seat (23) and the lower end of the drive slider (21).

7. The outrigger device according to claim 6, characterized in that, The upper roller assembly (26) and the lower roller assembly (27) have the same structure and both include a support seat (271) provided on the fixed support leg (11) and a sliding wheel (272) rotatably provided on the support seat (271). The sliding wheel (272) is used for the traction wire rope (25) to be wound.

8. The outrigger device according to any one of claims 1 to 7, characterized in that, A drive cylinder is provided inside the telescopic cavity. One end of the drive cylinder is hinged to the fixed support leg (11), and the other end is fixedly connected to the telescopic support leg (12).

9. The outrigger device according to any one of claims 1 to 7, characterized in that, The outrigger device further includes a support linkage mechanism (6), which includes a first support link (61) and a second support link (62) that are hinged in sequence. A limiting baffle (63) is provided on the hinge end of the first support link (61) or the second support link (62). The limiting baffle (63) is used to limit and lock the first support link (61) and the second support link (62) when they rotate to the limit angle.

10. A chassis, characterized in that, Includes the outrigger device according to any one of claims 1 to 9 and the chassis body (7), wherein the scissor telescopic boom (3) in the outrigger device is horizontally connected to the chassis body (7), and the outrigger mechanism (1) is vertically arranged on the scissor telescopic boom (3).

11. An aerial work platform, characterized in that, Includes the chassis as described in claim 10.

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