An arm structure and aerial work platform

Abstract

The utility model relates to an arm support structure and aerial work platform, including chassis, rotary table, counterweight and lower amplitude arm, rotary table includes bottom plate, curb plate and front seal plate, and the bottom plate horizontal setting is in the chassis, and the first accommodation groove of one inclined extension is formed between the front seal plate and two curb plates, and the first gap is established to the end of front seal plate away from bottom plate, and the counterweight is connected in the bottom plate, and the second accommodation groove is set up to the counterweight, and the lower amplitude arm is Y type, including main arm and two symmetric connection in the main arm one end's side arm, and the free end of two side arms is respectively with its rotary connection in the side of two curb plates away from each other. The utility model discloses an arm support structure provides reasonable installation space for each component, makes each structure of arm support can further sink, and the overall structure layout is more compact, and simultaneously makes the part structure of arm support structure folding can extend to the rear end of the vehicle body, significantly reduces the gravity center front -back offset amplitude, can avoid appearing front end sinking, and the unbalanced risk of rear end lifting.

Description

Technical Field

[0001] This utility model relates to the field of aerial work platform technology, and in particular to a boom structure and aerial work platform. Background Technology

[0002] In modern industrial production, municipal construction, power maintenance, building construction, and many other fields, aerial work platforms play an indispensable role as specialized engineering machinery capable of safely transporting personnel, tools, and materials to high-altitude work positions. Among them, articulated boom aerial work platforms, with their unique multi-section boom structure, can flexibly adjust the working height and working radius through boom folding, extension, and rotation to meet the needs of aerial work under various complex working conditions, and therefore have been widely used and promoted in the market.

[0003] However, the existing boom structure of aerial work platforms has an unreasonable layout design between its components, resulting in a large overall size after folding, especially in height. This causes great inconvenience to the transportation and storage of the equipment, increases the space occupation cost during transportation, and also puts forward higher requirements for the height of the storage site, limiting the storage and transfer of the equipment in some space-constrained scenarios. At the same time, the existing boom structure is located at the front of the vehicle body after folding, causing the center of the vehicle body to shift excessively forward, which is prone to imbalance risks such as front sinking and rear lifting. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the fact that the boom structure of the existing aerial work platform has an unreasonable layout design between the various components, resulting in a large overall size after folding, especially a high height. This causes great inconvenience to the transportation and storage of the equipment, increases the space occupation cost during transportation, and also puts forward higher requirements for the height of the storage site, limiting the storage and transfer of the equipment in some space-constrained scenarios. At the same time, the existing boom structure is located at the front of the vehicle body after folding, causing the center of the vehicle body to shift excessively forward, which is prone to the problem of imbalance risk of the front sinking and the rear lifting.

[0005] To solve the above-mentioned technical problems, this utility model provides a boom structure, including,

[0006] Chassis;

[0007] A turntable, comprising a base plate, side plates, and a front sealing plate, wherein the base plate is horizontally disposed on the chassis, and two side plates are disposed, the two side plates being vertically connected to the base plate and parallel to each other, and the front sealing plate being connected between the two side plates, forming an inclined extending first receiving groove between the front sealing plate and the two side plates, and a first notch being provided at the end of the front sealing plate away from the base plate;

[0008] A counterweight is connected to the base plate and located on the side with the lower height of the first receiving groove. A second receiving groove is provided on the counterweight, which corresponds to the position of the first receiving groove.

[0009] The lower luffing arm is Y-shaped and includes a main arm and two auxiliary arms symmetrically connected to one end of the main arm. The free ends of the two auxiliary arms are rotatably connected to the two side plates on opposite sides.

[0010] In one embodiment of this utility model, it includes a hub, an upper luffing arm, a telescopic arm, a flying arm, a working platform, a first hydraulic cylinder, and a second hydraulic cylinder. One end of the hub is rotatably connected to the free end of the main arm, and the other end of the hub is rotatably connected to one end of the upper luffing arm. The telescopic arm is coaxially connected to the end of the upper luffing arm away from the hub. The telescopic end of the telescopic arm is connected to the flying arm. The working platform is mounted on the flying arm. The tailstock of the first hydraulic cylinder is rotatably connected to the two side plates in a first receiving groove. The telescopic end of the first hydraulic cylinder is rotatably connected to the main arm. The tailstock of the second hydraulic cylinder is rotatably connected to the hub, and the telescopic end of the second hydraulic cylinder is rotatably connected to the upper luffing arm.

[0011] In one embodiment of this utility model, a pull rod is included. One end of the pull rod is rotatably connected to the two side plates in the first receiving groove, and the other end of the pull rod is rotatably connected to the pivot. A through groove extending along its length is provided on the pull rod, and the telescopic end of the first hydraulic cylinder passes through the through groove and is rotatably connected to the main arm.

[0012] In one embodiment of the present invention, a reinforcing plate is further connected between the two side plates. The reinforcing plate is arranged parallel to the front sealing plate, and the end of the reinforcing plate away from the bottom plate is flush with the bottom of the first notch.

[0013] In one embodiment of the present invention, two steps are symmetrically arranged on the side of the counterweight away from the base plate, respectively located on both sides of the second receiving groove.

[0014] In one embodiment of the present invention, the counterweight has a second notch on the side near the turntable, and the two side plates extend into the second notch on the side away from the front sealing plate.

[0015] In one embodiment of the present invention, the lower luffing arm further includes a horizontal tube, diagonal braces, and a hinge plate. One end of the main arm is perpendicularly connected to the middle of the horizontal tube, and two diagonal braces are symmetrically connected between the main arm and the horizontal tube. The hinge plate is connected to one side of the main arm.

[0016] In one embodiment of this utility model, the base plate is rotatably connected to the chassis via a slewing bearing.

[0017] In one embodiment of the present invention, a rear sealing plate located on the side away from the front sealing plate is also connected between the two side plates.

[0018] An aerial work platform includes a boom structure as described in any of the above.

[0019] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0020] The boom structure and aerial work platform described in this utility model, by setting the first and second receiving slots connected on the turntable and counterweight block, and setting the lower luffing boom with a unique structure, allows the various structures of the boom to sink further, making the overall structural layout more compact; at the same time, it allows part of the boom structure to extend to the rear of the vehicle body after folding, significantly reducing the front-to-back shift of the center of gravity and avoiding the risk of imbalance due to the front sinking and the rear lifting. Attached Figure Description

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the boom structure of a preferred embodiment of the present invention when folded.

[0023] Figure 2 This is a schematic diagram of the boom structure of a preferred embodiment of the present invention when deployed;

[0024] Figure 3 This is a schematic diagram of the overall structure of the boom structure according to a preferred embodiment of the present invention;

[0025] Figure 4 This is a first-view structural schematic diagram of the turntable of the boom structure of the preferred embodiment of this utility model;

[0026] Figure 5 This is a second-view structural schematic diagram of the turntable of the boom structure of the preferred embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the counterweight block of the boom structure in a preferred embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the lower luffing boom of the boom structure of a preferred embodiment of the present invention.

[0029] Explanation of reference numerals in the accompanying drawings: 1. Chassis; 2. Turntable; 21. Base plate; 22. Side plate; 23. Front sealing plate; 24. First receiving slot; 25. First notch; 26. Reinforcing plate; 27. Rear sealing plate; 3. Counterweight; 31. Second receiving slot; 32. Step; 33. Second notch; 4. Lower luffing boom; 41. Main boom; 42. Auxiliary boom; 43. Horizontal tube; 44. Diagonal brace; 45. Hinge plate; 46. Cover plate; 5. Slewing bearing; 6. Pivot; 7. Upper luffing boom; 8. Telescopic boom; 9. Flying boom; 10. Working platform; 11. First hydraulic cylinder; 12. Second hydraulic cylinder; 13. Tie rod. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0031] Example 1, refer to Figures 1-7 As shown, a boom structure of this utility model includes,

[0032] Chassis 1;

[0033] Turntable 2 includes a base plate 21, side plates 22 and a front sealing plate 23. The base plate 21 is horizontally mounted on the chassis 1. There are two side plates 22, which are vertically connected to the base plate 21 and are parallel to each other. The front sealing plate 23 is connected between the two side plates 22. The front sealing plate 23 and the two side plates 22 form an inclined extending first receiving groove 24. The front sealing plate 23 has a first notch 25 at the end away from the base plate 21.

[0034] The counterweight 3 is connected to the base plate 21 and is located on the side with the lower height of the first receiving groove 24. The counterweight 3 has a second receiving groove 31 that corresponds to the position of the first receiving groove 24.

[0035] The lower luffing arm 4 is Y-shaped and includes a main arm 41 and two auxiliary arms 42 symmetrically connected to one end of the main arm 41. The free ends of the two auxiliary arms 42 are rotatably connected to the two side plates 22 on the side away from each other.

[0036] Specifically, the chassis 1 serves as the basic support component, on which a slewing bearing 5 is installed. The inner ring of the slewing bearing 5 is horizontally connected to the base plate 21 by fasteners, allowing the turntable 2 to rotate flexibly relative to the chassis 1.

[0037] The turntable 2 consists of a base plate 21, two side plates 22, a front sealing plate 23, a reinforcing plate 26, and a rear sealing plate 27. The two side plates 22 are fixed vertically and parallel to the base plate 21. The front sealing plate 23 is connected between the two side plates 22 and together with the two side plates 22 forms a first receiving groove 24 that extends upward from the base plate 21. A first notch 25 is provided at the end of the front sealing plate 23 away from the base plate 21, and a second receiving groove 31 that connects with the first receiving groove 24 is provided on the counterweight block 3. When the boom structure is folded, the first hydraulic cylinder 11 and part of the tie rod 13 can sink in. In the first receiving slot 24, the front end of the upper luffing arm 7 can also sink into the first notch 25, while the rear ends of the tie rod 13 and the lower luffing arm 4 can sink into the second receiving slot 31. The tie rod 13 and the lower luffing arm 4 can extend to the rear end of the vehicle body via the second receiving slot 31. This not only allows the folded hub 6, the second hydraulic cylinder 12, and the upper luffing arm 7 to further utilize the space in the vehicle body's height direction, but also, with both ends of the boom extending to the front and rear positions of the vehicle body after folding, significantly reduces the front-rear offset of the boom's center of gravity, lowering the possibility of imbalance. The entire boom structure is compact, with a lower folded height, reducing space occupation costs during transportation.

[0038] The lower luffing boom 4 is designed in a Y-shape. The gap between the two secondary booms 42 of the lower luffing boom 4 can provide space for the upper luffing boom 7 to sink further after folding and avoid interference. Moreover, the Y-shaped structure of the lower luffing boom 4 increases the horizontal stiffness of the boom compared to a single boom, making the boom structure more stable and less prone to swaying.

[0039] The present invention provides a boom structure by setting a first receiving groove 24 and a second receiving groove 31 connected on the turntable 2 and the counterweight block 3, and setting a lower luffing boom 4 with a unique structure, so that the various structures of the boom can be further lowered, and the overall structural layout is more compact; at the same time, it allows the part of the boom structure to extend to the rear end of the vehicle body after folding, which can avoid the risk of imbalance caused by the front end sinking and the rear end lifting.

[0040] Reference Figure 3As shown, the system further includes a hub 6, an upper luffing arm 7, a telescopic arm 8, a flying arm 9, a working platform 10, a first hydraulic cylinder 11, and a second hydraulic cylinder 12. One end of the hub 6 is rotatably connected to the free end of the main boom 41, and the other end of the hub 6 is rotatably connected to one end of the upper luffing arm 7. The end of the upper luffing arm 7 away from the hub 6 is coaxially connected to the telescopic arm 8, and the telescopic end of the telescopic arm 8 is connected to the flying arm 9. The working platform 10 is mounted on the flying arm 9. The tailstock of the first hydraulic cylinder 11 is rotatably connected to the two side plates 22 within the first receiving groove 24, and the telescopic end of the first hydraulic cylinder 11 is rotatably connected to the main boom 41. The tailstock of the second hydraulic cylinder 12 is rotatably connected to the hub 6, and the telescopic end of the second hydraulic cylinder 12 is rotatably connected to the upper luffing arm 7. Specifically, the hub 6, the upper luffing arm 7, the telescopic arm 8, the flying arm 9, the working platform 10, the first hydraulic cylinder 11, and the second hydraulic cylinder 12 are all existing structures and will not be further described here.

[0041] Furthermore, the system includes a tie rod 13, one end of which is rotatably connected to the two side plates 22 within the first receiving groove 24, and the other end of which is rotatably connected to the pivot 6. A through groove extending along the length of the tie rod 13 is provided on the tie rod 13, and the telescopic end of the first hydraulic cylinder 11 passes through the through groove and is rotatably connected to the main boom 41. Specifically, when the boom structure is folded, the first hydraulic cylinder 11 can be embedded in the through groove on the tie rod 13, further reducing the volume and height of the structure.

[0042] Reference Figure 4 and Figure 5 As shown, a reinforcing plate 26 is further connected between the two side plates 22. The reinforcing plate 26 is set parallel to the front sealing plate 23, and the end of the reinforcing plate 26 away from the bottom plate 21 is flush with the bottom of the first notch 25. Specifically, the reinforcing plate 26 is set parallel to the front sealing plate 23 between the two side plates 22, and the end of the reinforcing plate 26 away from the bottom plate 21 is flush with the bottom of the first notch 25. While enhancing the structural strength of the turntable 2, the reinforcing plate 26 can also provide certain support for the upper luffing boom 7 after the boom structure is folded, ensuring the stability of the structure after folding.

[0043] Reference Figure 6 As shown, furthermore, two steps 32 are symmetrically arranged on the side of the counterweight block 3 away from the base plate 21, located on both sides of the second receiving slot 31. Specifically, since the lower luffing boom 4 is Y-shaped, two steps 32 are provided on the top of the counterweight block 3 to avoid the diagonal brace 44 of the lower luffing boom 4. This eliminates the need to increase the size of the second receiving slot 31, making the overall boom structure more compact. It is conceivable that the "smaller in the front and larger in the back" counterweight structure makes the center of gravity of the counterweight farther from the center of rotation, resulting in higher overall stability of the machine with the same counterweight mass.

[0044] Furthermore, a second notch 33 is provided on the side of the counterweight 3 closest to the turntable 2, and the side plates 22 away from the front sealing plate 23 extend into the second notch 33. Specifically, the second notch 33 allows the counterweight 3 to be tightly connected to the turntable 2, improving the compactness of the overall structure. The second notch 33 can also play a certain limiting role on the turntable 2, which is beneficial to improving the stability of the boom during operation.

[0045] Reference Figure 7 As shown, the lower luffing boom 4 further includes a horizontal tube 43, diagonal braces 44, and a hinge plate 45. One end of the main boom 41 is perpendicularly connected to the middle of the horizontal tube 43, and two diagonal braces 44 are symmetrically connected between the main boom 41 and the horizontal tube 43. The hinge plate 45 is connected to one side of the main boom 41, and the telescopic end of the first hydraulic cylinder 11 is rotatably connected to the hinge plate 45. The main boom 41 and the auxiliary boom 42 can be made of square tubing. More preferably, cover plates 46 can be provided on both sides of the lower luffing boom 4 to cover the connection positions of the main boom 41 and the auxiliary boom 42 with the horizontal tube 43, diagonal braces 44, and other components. This not only makes the entire structure look more aesthetically pleasing but also improves the strength of the lower luffing boom 4 to a certain extent.

[0046] Furthermore, the base plate 21 is rotatably connected to the chassis 1 via the slewing bearing 5.

[0047] Furthermore, a rear sealing plate 27 located on the side away from the front sealing plate 23 is connected between the two side plates 22, further enhancing the overall rigidity of the turntable 2.

[0048] Example 2: This utility model also discloses an aerial work platform, including the boom structure as in Example 1.

[0049] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A boom structure, characterized by: include, Chassis; A turntable, comprising a base plate, side plates, and a front sealing plate, wherein the base plate is horizontally disposed on the chassis, and two side plates are disposed, the two side plates being vertically connected to the base plate and parallel to each other, and the front sealing plate being connected between the two side plates, forming an inclined extending first receiving groove between the front sealing plate and the two side plates, and a first notch being provided at the end of the front sealing plate away from the base plate; A counterweight is connected to the base plate and located on the side with the lower height of the first receiving groove. A second receiving groove is provided on the counterweight, which corresponds to the position of the first receiving groove. The lower luffing arm is Y-shaped and includes a main arm and two auxiliary arms symmetrically connected to one end of the main arm. The free ends of the two auxiliary arms are rotatably connected to the two side plates on opposite sides.

2. The boom structure according to claim 1, characterized in that: The system includes a hub, an upper luffing boom, a telescopic boom, a flying boom, a working platform, a first hydraulic cylinder, and a second hydraulic cylinder. One end of the hub is rotatably connected to the free end of the main boom, and the other end of the hub is rotatably connected to one end of the upper luffing boom. The telescopic boom is coaxially connected to the end of the upper luffing boom away from the hub. The telescopic end of the telescopic boom is connected to the flying boom. The working platform is mounted on the flying boom. The tailstock of the first hydraulic cylinder is rotatably connected to the two side plates in a first receiving groove. The telescopic end of the first hydraulic cylinder is rotatably connected to the main boom. The tailstock of the second hydraulic cylinder is rotatably connected to the hub, and the telescopic end of the second hydraulic cylinder is rotatably connected to the upper luffing boom.

3. The boom structure according to claim 2, characterized in that: The device includes a pull rod, one end of which is rotatably connected to the two side plates within the first receiving groove, and the other end of which is rotatably connected to the pivot. The pull rod has a through groove extending along its length, and the telescopic end of the first hydraulic cylinder passes through the through groove and is rotatably connected to the main arm.

4. The boom structure according to claim 1, characterized in that: A reinforcing plate is also connected between the two side plates. The reinforcing plate is arranged parallel to the front sealing plate, and the end of the reinforcing plate away from the bottom plate is flush with the bottom of the first notch.

5. The boom structure according to claim 1, characterized in that: Two steps are symmetrically arranged on the side of the counterweight away from the base plate, located on both sides of the second receiving groove.

6. The boom structure according to claim 1, characterized in that: The counterweight has a second notch on the side near the turntable, and the two side plates extend into the second notch on the side away from the front sealing plate.

7. The boom structure according to claim 1, characterized in that: The lower luffing arm also includes a horizontal tube, diagonal braces, and a hinge plate. One end of the main arm is perpendicularly connected to the middle of the horizontal tube, and two diagonal braces are symmetrically connected between the main arm and the horizontal tube. The hinge plate is connected to one side of the main arm.

8. The boom structure according to claim 1, characterized in that: The base plate is rotatably connected to the chassis via a slewing bearing.

9. The boom structure according to claim 1, characterized in that: A rear sealing plate located on the side away from the front sealing plate is also connected between the two side plates.

10. An aerial work platform, characterized in that: Includes the boom structure as described in any one of claims 1-9.

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