A folding telescopic arm mechanism and an aerial work platform

Abstract

The application relates to a folding telescopic arm mechanism and an aerial work platform, and belongs to the field of working arms. The mechanism comprises a first arm, a second arm and a third arm. The third arm is a telescopic arm structure, the third arm is hinged on the side of the front end of the second arm, and the tail end of the second arm is hinged on the front end of the first arm. A lifting cylinder is connected between the first arm and the second arm, and is used for controlling the rotation of the second arm around the hinge shaft between the first arm and the second arm. A turnover cylinder is further connected between the second arm and the third arm, one end of the turnover cylinder is hinged on the second arm, the other end of the turnover cylinder is hinged on the third arm through a connecting rod structure, and the turnover cylinder is used for driving the third arm to rotate and overturn around the hinge shaft between the third arm and the second arm. The third arm can be turned over to the side of the second arm, so that the interference of the working head connected with the third arm to other structural components such as the first arm and a vehicle is avoided, and the occupied space after the telescopic arm is stored is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of boom technology, specifically to a folding telescopic boom mechanism and an aerial work platform. Background Technology

[0002] Machinery used in high-altitude operations such as climbing, logging, and rescue often has a telescopic boom structure. Existing telescopic boom structures are mostly single-section lifting straight boom structures. For example, a lifting boom disclosed in utility model patent with announcement number CN207726614U includes a lower boom structure set on a base and an upper boom structure connected to the lower boom structure. The upper boom structure is a hydraulic or electric multi-section folding structure. The upper boom structure includes a first boom section and a second boom section connected to each other. The first boom section is a Z-shaped folding boom, and the rear end of the second boom section is a telescopic boom structure.

[0003] However, the existing technologies mentioned above still have the following problems: on the one hand, the telescopic arm of this type requires a large space when stored, resulting in a large overall size of the machine, especially when used as a vehicle-mounted telescopic arm structure, which has high requirements for the size of the vehicle; on the other hand, the working head carried at the end of the telescopic arm after folding can easily interfere with other structural components of the telescopic arm or the vehicle, affecting further storage and transportation. Summary of the Invention

[0004] The present invention provides a folding telescopic boom mechanism and an aerial work platform to address the aforementioned problems existing in the prior art.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] On one hand, the present invention provides a folding telescopic arm mechanism, characterized in that it includes a first arm, a second arm, and a third arm, wherein the third arm is a telescopic arm structure, the third arm is hinged to the front end of the second arm, and the tail end of the second arm is hinged to the front end of the first arm.

[0007] A lifting cylinder is connected between the first arm and the second arm to control the rotation of the second arm around the hinge axis between it and the first arm.

[0008] A tilting cylinder is also connected between the second and third arms. One end of the tilting cylinder is hinged to the second arm, and the other end is hinged to the third arm through a connecting rod structure. It is used to drive the third arm to rotate and tilt around its hinge axis with the second arm.

[0009] Furthermore, the third arm includes a first telescopic joint, a second telescopic joint, and a third telescopic joint. The second telescopic joint is slidably disposed inside the first telescopic joint, and the third telescopic joint is slidably disposed inside the second telescopic joint. The third telescopic joint is used to connect to the working head directly or indirectly. The third arm also includes an extension drive for driving the second and third telescopic joints to extend or retract simultaneously.

[0010] Furthermore, the boom extension drive includes a telescopic cylinder and a traction assembly. The telescopic cylinder is connected between the first telescopic section and the second telescopic section and is used to drive the second telescopic section to slide relative to the first telescopic section. The traction assembly is connected to the first telescopic section, the second telescopic section, and the third telescopic section and is used to pull the third telescopic section to slide synchronously relative to the second telescopic section when the second telescopic section slides relative to the first telescopic section.

[0011] Furthermore, the traction assembly includes a guide wheel one, a guide wheel two, a traction component one, and a traction component two. The guide wheel one and the guide wheel two are respectively connected to the front end and the rear end of the second telescopic section in a manner that allows them to rotatably around their axes. One end of the traction component one is connected to the front end of the first telescopic section, and the other end of the traction component one passes around the guide wheel one and is connected to the rear end of the third telescopic section. One end of the traction component two is connected to the front end of the first telescopic section, and the other end of the traction component two passes around the guide wheel two and is connected to the rear end of the third telescopic section.

[0012] Furthermore, the first and second traction components adopt a chain structure or rope structure.

[0013] Furthermore, the third arm is also connected to a pipeline receiving mechanism for storing pipelines and extending and retracting with the extension and retraction of the third arm.

[0014] Furthermore, the pipeline receiving mechanism includes a cable chain, an inner tube, an outer tube, and an outer tube sliding frame. One end of the inner tube is connected to the third telescopic joint, and the other end of the inner tube can slide into the outer tube. The outer tube is connected to the second telescopic joint and can be slidably installed in the outer tube sliding frame. The outer tube sliding frame is fixedly connected to the first telescopic joint. One end of the cable chain is connected to the first telescopic joint, and the other end of the cable chain passes through the outer tube and connects to the tail end of the inner tube.

[0015] Furthermore, the linkage structure includes a first linkage and a second linkage. One end of the first linkage is hinged to the second arm, one end of the second linkage is hinged to the third arm, and the other end of the first linkage and the other end of the second linkage are hinged to each other and connected to one end of the tilting cylinder through their hinge axis.

[0016] Furthermore, the third arm has a connecting arm that is hinged to the second arm and the connecting rod, so that the third arm can be flipped to the side of the second arm.

[0017] On the other hand, the present invention provides an aerial work platform vehicle, characterized in that it includes a vehicle and a folding telescopic boom mechanism as described above, wherein the first boom is fixedly or rotatably connected to the vehicle.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention, through the structural relationship between the tilting cylinder and the second and third arms via connecting rod one and connecting rod two, and the hinge of the third arm to the side of the front end of the second arm, enables the third arm to be tilted to the side of the second arm. This avoids interference from the working head connected to the third arm to other structural components such as the first arm and the vehicle, and greatly reduces the space occupied by the telescopic arm after it is folded up. Especially when used as a vehicle-mounted folding telescopic arm mechanism, it occupies little space after folding up, making it easy to store and transport in the vehicle.

[0020] 2. Furthermore, the present invention, through the structure of the third arm, especially the connection relationship between the three telescopic joints and the telescopic drive, enables the same power source to drive two telescopic joints to extend or retract simultaneously, resulting in a simple structure.

[0021] 3. Furthermore, through the structure of the pipeline accommodating mechanism and its connection with the three telescopic joints, the present invention can achieve pipeline storage and avoid pipeline clutter, while also allowing the pipeline to extend and retract synchronously with the extension and retraction of the third arm, thus avoiding the influence of the pipeline on the extension and retraction of the telescopic arm.

[0022] 4. The present invention further provides an aerial work platform vehicle, which, because it has the above-mentioned folding telescopic boom mechanism, also has the beneficial effects brought by the above-mentioned folding telescopic boom mechanism. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the third arm according to an embodiment of the present invention;

[0025] Figure 3 This is a top view of the structure in the storage state according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the present invention in its stored state according to an embodiment;

[0027] In the diagram: 1. First arm, 2. Second arm, 3. Third arm, 31. First telescopic joint, 32. Second telescopic joint, 33. Third telescopic joint, 34. Extending arm drive, 341. Telescopic cylinder, 342. Guide wheel one, 343. Guide wheel two, 344. Traction component one, 345. Traction component two, 41. Lifting cylinder, 42. Tilting cylinder, 51. Connecting rod one, 52. Connecting rod two, 6. Pipeline receiving mechanism, 7. Connecting arm. Detailed Implementation

[0028] The principles and features of the present invention are described below. The embodiments given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0029] As attached Figure 1As shown, the folding telescopic arm mechanism of this embodiment includes a first arm 1, a second arm 2, and a third arm 3. The third arm 3 is a telescopic arm structure, hinged to the front end of the second arm 2, and the tail end of the second arm 2 is hinged to the front end of the first arm 1. A lifting cylinder 41 is connected between the first arm 1 and the second arm 2 to control the rotation of the second arm 2 around its hinge axis with the first arm 1. A tilting cylinder 42 is also connected between the second arm 2 and the third arm 3. One end of the tilting cylinder 42 is hinged to the second arm 2, and the other end is hinged to the third arm 3 via a connecting rod structure, used to drive the third arm 3 to rotate and tilt around its hinge axis with the second arm 2. Both the lifting cylinder 41 and the tilting cylinder 42 in this embodiment are hydraulic cylinders.

[0030] The linkage structure enables the third arm to rotate around the second arm at a large angle. Specifically, in this embodiment, the linkage structure includes a first linkage 51 and a second linkage 52. One end of the first linkage 51 is hinged to the second arm 2, one end of the second linkage 52 is hinged to the third arm 3, and the other end of the first linkage 51 and the other end of the second linkage 52 are hinged to each other and connected to one end of the tilting cylinder 42 through their hinge axis.

[0031] Specifically, in this embodiment, the third arm 3 includes a first telescopic joint 31, a second telescopic joint 32, and a third telescopic joint 33. The second telescopic joint 32 is slidably disposed inside the first telescopic joint 31, and the third telescopic joint 33 is slidably disposed inside the second telescopic joint 32. The third telescopic joint 33 is used to connect to the working head.

[0032] When using the folding telescopic boom mechanism of this embodiment for high-altitude operations, the working head is directly or indirectly mounted on the front end of the third arm. Then, the angle between the first arm 1 and the second arm 2 is adjusted by the lifting cylinder 41, and the angle between the second arm 2 and the third arm 3 is adjusted by the tilting cylinder 42. The telescopic third arm then moves its front working head to the working area. After use, the third arm 3 can be retracted, and the tilting cylinder 42 pushes the third arm to rotate around its hinge point with the second arm until it tilts to the side of the second arm. Figure 3 As shown, specifically, the third arm 3 has a connecting arm 7 on its side for hinged connection with the second arm 2 and the connecting rod 52, so that the third arm 3 can be flipped to the side of the second arm 2. The connecting arm 7 can be part of the third arm 3 or a connecting component fixedly connected to the third arm 3. In this way, the space occupied by the telescopic arm after storage can be greatly reduced and interference with the first and second arms can be avoided. Especially when used as a vehicle-mounted folding telescopic arm mechanism, the space occupied after storage is small, which facilitates storage and transportation in the vehicle.

[0033] In addition, the side-mounted design of the third arm brought by the connecting arm 7 can also make the relative position of the third arm and the second arm in the length direction controllable after storage. That is, the relative position of the third arm and the second arm after folding and storage can be adjusted by the connection point of the connecting arm and the third arm.

[0034] In another embodiment of the present invention, the connecting arm 7 can be connected to either the end position or a non-end position of the third arm 3, depending on the circumstances. For example, when the third arm 3 is long, the connecting arm 7 can be connected to a non-end position of the third arm 3, so that when the third arm 3 is flipped to the side of the second arm 2, the end of the third arm 3 near the first telescopic joint 31 protrudes forward a predetermined distance from the front end of the second arm 2. Figure 3 and Figure 4 As shown, this can prevent the working head at the end of the third arm from extending too long, which would make the overall structure of the telescopic arm too large and thus affect its storage, or make it more suitable for vehicle length conditions.

[0035] In a preferred embodiment of the present invention, the third arm 3 further includes an extension drive 34 for driving the second telescopic section 32 and the third telescopic section 33 to extend or retract simultaneously. Specifically, the extension drive 34 includes a telescopic cylinder 341 and a traction assembly. In this embodiment, the telescopic cylinder 341 is a hydraulic cylinder, which is connected between the first telescopic section 31 and the second telescopic section 32, and is used to drive the second telescopic section 32 to slide relative to the first telescopic section 31. The traction assembly is connected to the first telescopic section 31, the second telescopic section 32, and the third telescopic section 33, and is used to traction the third telescopic section to slide synchronously relative to the second telescopic section 32 when the second telescopic section 32 slides relative to the first telescopic section 31. The traction assembly includes a first guide wheel 342, a second guide wheel 343, a first traction member 344, and a second traction member 345. The first guide wheel 342 and the second guide wheel 343 are respectively connected to the front end and rear end of the second telescopic section 32 in a manner rotatable around their axes. One end of the first traction member 344 is connected to the front end of the first telescopic section 31, and the other end of the first traction member 344 passes around the first guide wheel 342 and is connected to the rear end of the third telescopic section 33. One end of the second traction member 345 is connected to the front end of the first telescopic section 31, and the other end of the second traction member 345 passes around the second guide wheel 343 and is connected to the rear end of the third telescopic section 33. The first traction member 344 and the second traction member 345 employ a chain structure; in other embodiments, a rope structure may also be used. Thus, when the telescopic cylinder 341 drives the second telescopic section 32 to slide relative to the first telescopic section 31 for extension and retraction, it can drive the third telescopic section 33 to slide synchronously relative to the second telescopic section 32 to achieve synchronous extension and retraction, that is, the two telescopic sections of the third arm are driven by the same power source to move synchronously.

[0036] In a preferred embodiment of the present invention, to prevent the hydraulic oil lines from becoming tangled or jammed during the extension and retraction of the third arm, the third arm 3 is also connected to a pipeline receiving mechanism 6 for storing the pipelines and extending and retracting with the extension and retraction of the third arm 3. Specifically, the pipeline receiving mechanism 6 includes a cable chain 61, an inner support tube 62, an outer support tube 63, and an outer support tube sliding frame 64. One end of the inner support tube 62 is connected to the third telescopic section 33, and the other end of the inner support tube 62 slidably extends into the outer support tube 63. The outer support tube 63 is connected to the second telescopic section 32 and slidably installed in the outer support tube sliding frame 64. The outer support tube sliding frame 64 is fixedly connected to the first telescopic section 31. One end of the cable chain 61 is connected to the first telescopic section 31, and the other end of the cable chain 61 passes through the outer support tube 63 and connects to the tail end of the inner support tube 62. When the third arm extends and retracts, it will drive the pipeline receiving mechanism to extend and retract synchronously, avoiding pipeline tangling and interference with the extension and retraction operation.

[0037] In addition, the present invention also provides an aerial work platform vehicle, which includes a vehicle and any of the above-mentioned folding telescopic boom mechanisms, wherein the first arm 1 is fixedly or rotatably connected to the vehicle, preferably rotatably mounted on the vehicle via a slewing support, which provides good working flexibility and has the beneficial effects brought by the above-mentioned folding telescopic boom mechanism, which will not be elaborated here.

Claims

1. A folding telescopic arm mechanism, characterized in that, It includes a first arm (1), a second arm (2), and a third arm (3), wherein the third arm (3) is a telescopic arm structure, the third arm (3) is hinged to the front side of the second arm (2), and the tail end of the second arm (2) is hinged to the front end of the first arm (1); A lifting cylinder (41) is connected between the first arm (1) and the second arm (2) to control the second arm (2) to rotate around the hinge axis between it and the first arm (1); A tilting cylinder (42) is also connected between the second arm (2) and the third arm (3). One end of the tilting cylinder (42) is hinged to the second arm (2), and the other end of the tilting cylinder (42) is hinged to the third arm (3) through a connecting rod structure. The third arm (3) includes a first telescopic section (31), a second telescopic section (32), and a third telescopic section (33). The second telescopic section (32) is slidably disposed inside the first telescopic section (31), and the third telescopic section (33) is slidably disposed inside the second telescopic section (32). The third arm (3) also includes an extension drive (34) for driving the second telescopic section (32) and the third telescopic section (33) to extend or retract simultaneously. The boom extension drive (34) includes a telescopic cylinder (341) and a traction assembly. The telescopic cylinder (341) is connected between the first telescopic section (31) and the second telescopic section (32) and is used to drive the second telescopic section (32) to slide relative to the first telescopic section (31). The traction assembly is connected to the first telescopic section (31), the second telescopic section (32) and the third telescopic section (33) and is used to pull the third telescopic section to slide synchronously relative to the second telescopic section (32) when the second telescopic section (32) slides relative to the first telescopic section (31). The traction assembly includes a guide wheel one (342), a guide wheel two (343), a traction component one (344), and a traction component two (345). The guide wheel one (342) and the guide wheel two (343) are respectively connected to the front end and the rear end of the second telescopic section (32) in a manner that allows them to rotate around their axes. One end of the traction component one (344) is connected to the front end of the first telescopic section (31), and the other end of the traction component one (344) passes around the guide wheel one (342) and is connected to the rear end of the third telescopic section (33). One end of the traction component two (345) is connected to the front end of the first telescopic section (31), and the other end of the traction component two (345) passes around the guide wheel two (343) and is connected to the rear end of the third telescopic section (33). The connecting rod structure includes connecting rod one (51) and connecting rod two (52). One end of connecting rod one (51) is hinged to the second arm (2), one end of connecting rod two (52) is hinged to the third arm (3), and the other end of connecting rod one (51) and the other end of connecting rod two (52) are hinged to each other and connected to one end of the tilting cylinder (42) through the hinge axis of the two.

2. The folding telescopic arm mechanism according to claim 1, characterized in that, The first traction component (344) and the second traction component (345) adopt a chain structure or a rope component.

3. The folding telescopic arm mechanism according to claim 1, characterized in that, The third arm (3) is also connected to a pipeline receiving mechanism (6), which is used to receive pipelines and extend and retract with the extension and retraction of the third arm (3).

4. The folding telescopic arm mechanism according to claim 3, characterized in that, The pipeline receiving mechanism (6) includes a cable chain (61), an inner tube (62), an outer tube (63), and an outer tube sliding frame (64). One end of the inner tube (62) is connected to the third expansion joint (33), and the other end of the inner tube (62) can slide into the outer tube (63). The outer tube (63) is connected to the second expansion joint (32) and can be slidably installed in the outer tube sliding frame (64). The outer tube sliding frame (64) is fixedly connected to the first expansion joint (31). One end of the cable chain (61) is connected to the first expansion joint (31), and the other end of the cable chain (61) passes through the outer tube (63) and is connected to the tail end of the inner tube (62).

5. The folding telescopic arm mechanism according to claim 1, characterized in that, The third arm (3) has a connecting arm (7) for hinged to the second arm (2) and the second link (52) so that the third arm (3) can be flipped to the side of the second arm (2).

6. An aerial work platform vehicle, characterized in that, Includes a vehicle and a folding telescopic arm mechanism as described in any one of claims 1-5, wherein the first arm (1) is fixedly or rotatably connected to the vehicle.

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