Telescopic arm of overhead working truck and overhead working truck

Abstract

The utility model relates to the technical field of overhead working trucks, and discloses an overhead working truck telescopic boom and an overhead working truck. The overhead working truck telescopic boom comprises an outer sleeve, a middle sleeve and an inner sleeve which are sequentially sleeved in a telescopic mode, and a first sliding block is connected to the position, close to a port of the middle sleeve, in the middle sleeve through a first connecting piece; the outer wall of the inner sleeve is in sliding contact with the first sliding block, a second sliding block is connected to the position, close to a port of the outer sleeve, in the outer sleeve through a second connecting piece, and the outer wall of the middle sleeve is in sliding contact with the second sliding block; the first connecting piece comprises a stress part and a connecting part which are connected, the connecting part penetrates through the middle sleeve and the first sliding block, and the stress part is located on the outer side of the middle sleeve; a receding notch is formed in a port of the outer sleeve, and when the middle sleeve is in a retraction state relative to the outer sleeve, the stress part is located in the receding notch. The telescopic stability is better, and the telescopic smoothness is better.

Description

Technical Field

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

[0002] Telescopic boom aerial work platforms are multi-purpose aerial work vehicles with off-road capabilities and telescopic booms. They feature a lightweight chassis, making them suitable for aerial work in confined spaces. The telescopic boom of an aerial work platform typically uses a nested structure of at least three rectangular cross-section boom sections. Wear-resistant polymer sliders are installed between each boom section, and a hydraulic and chain-driven synchronous drive system achieves proportional extension and retraction. In existing technology, when each boom section retracts, the bolts fixing the sliders cause interference between the bolts securing the sliders in the outermost boom section and the sliders on that section. This forces the sliders on the outermost boom section to either retract to avoid the bolts or have the sliders on the two different boom sections arranged in an alternating pattern, failing to maximize the auxiliary sliding effect of the sliders on each boom section. Utility Model Content

[0003] Based on the above, the purpose of this utility model is to provide an aerial work platform telescopic boom and an aerial work platform, which have better telescopic stability and smoother telescopic operation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A telescopic boom for an aerial work platform includes an outer sleeve, a middle sleeve, and an inner sleeve that are telescopically fitted together in sequence. A first slider is connected to the middle sleeve near its port via a first connector. The outer wall of the inner sleeve is in slidable contact with the first slider. A second slider is connected to the outer sleeve near its port via a second connector. The outer wall of the middle sleeve is in slidable contact with the second slider.

[0006] The first connector includes a force-bearing part and a connecting part, the connecting part passing through the middle sleeve and the first slider, and the force-bearing part located on the outside of the middle sleeve;

[0007] The outer sleeve has a clearance notch at its port. When the middle sleeve is in a retracted state relative to the outer sleeve, the force-bearing part is located in the clearance notch.

[0008] As a preferred embodiment of the telescopic boom of an aerial work platform, the first connecting member is a bolt, the connecting part is the shank of the bolt, the force-bearing part is the head of the bolt, and the shank is threadedly connected to the middle sleeve and the first slider.

[0009] As a preferred scheme of the telescopic arm of the aerial work platform, the first sliding block is provided with two, and the two first sliding blocks are connected in the first direction and are spaced in the middle sleeve, and the first direction is perpendicular to the sliding direction of the inner sleeve.

[0010] As a preferred scheme of the telescopic arm of the aerial work platform, the end face of the port of the outer sleeve is partially a plane perpendicular to the axis of the outer sleeve, and the other part is a bevel to form the avoiding gap.

[0011] As a preferred scheme of the telescopic arm of the aerial work platform, the second sliding block is provided with two, and the two second sliding blocks are connected in the first direction and are spaced in the outer sleeve, and the first direction is perpendicular to the sliding direction of the middle sleeve.

[0012] As a preferred scheme of the telescopic arm of the aerial work platform, the second connecting piece is threadedly connected to the outer sleeve and the second sliding block.

[0013] As a preferred scheme of the telescopic arm of the aerial work platform, the outer edge of the port of the outer sleeve is at least partially formed with a first reinforcing skirt.

[0014] As a preferred scheme of the telescopic arm of the aerial work platform, the outer edge of the port of the middle sleeve is formed with a second reinforcing skirt.

[0015] As a preferred scheme of the telescopic arm of the aerial work platform, the first sliding block is a nylon sliding block.

[0016] The aerial work platform comprises the telescopic arm of the aerial work platform according to any one of the technical schemes.

[0017] The aerial work platform has the following beneficial effects:

[0018] The telescopic arm of the aerial work platform comprises an outer sleeve, a middle sleeve and an inner sleeve which are sequentially telescopic sleeves, the relative movement of the middle sleeve and the inner sleeve is reduced in friction by the first sliding block, the telescopic smoothness and stability of the inner sleeve are improved, the relative movement of the middle sleeve and the outer sleeve is reduced in friction by the second sliding block, the telescopic smoothness and stability of the middle sleeve are improved, meanwhile, the avoiding gap is arranged at the port of the outer sleeve, when the middle sleeve is retracted into the outer sleeve, the stress part of the first connecting piece is located in the avoiding gap, interference between the stress part and the port of the outer sleeve and the first sliding block is avoided, the retractable length of the middle sleeve is not affected, the second sliding block does not need to be avoided, the second sliding block can be arranged as close to the port of the outer sleeve as possible, the sliding smoothness and stability of the middle sleeve are improved, and the distribution of the first sliding block and the second sliding block is not limited and the working effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the contents of the embodiments of the present application and the drawings.

[0020] Figure 1 is a structural schematic view of the telescopic arm of the aerial work platform provided by the embodiments of the present application;

[0021] Figure 2 is a partial structural schematic view of the telescopic arm of the aerial work platform provided by the embodiments of the present application;

[0022] Figure 3 is a side view of the telescopic arm of the aerial work platform provided by the embodiments of the present application;

[0023] Figure 4 is a structural schematic view of the first reinforcing skirt provided by the embodiments of the present application;

[0024] Figure 5 is a structural schematic view of the second reinforcing skirt provided by the embodiments of the present application.

[0025] In the drawings:

[0026] 1, outer sleeve; 11, plane; 12, inclined surface; 2, middle sleeve; 3, inner sleeve; 4, first connecting piece; 41, stress part; 42, connecting part; 5, first sliding block; 6, second sliding block; 7, second connecting piece; 8, first reinforcing skirt; 9, second reinforcing skirt;

[0027] 10, avoiding gap. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0029] In the description of the utility model, unless another definite provision and limit, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements internal communication or two element mutual action relation.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0030] In the utility model, unless another definite provision and limit, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features is not direct contact but is through the contact between other features between them.And, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0031] In the description of the embodiment, the terms "on", "under", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification operation, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more than two.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0032] As Figures 1 to 5The embodiment shown provides a telescopic arm of a high-altitude operation vehicle, which comprises an outer sleeve 1, a middle sleeve 2 and an inner sleeve 3 which are sequentially sleeved, a first sliding block 5 is connected to the middle sleeve 2 through a first connecting piece 4 near the port of the middle sleeve 2, the outer wall of the inner sleeve 3 is in sliding contact with the first sliding block 5, a second sliding block 6 is connected to the outer sleeve 1 through a second connecting piece 7 near the port of the outer sleeve 1, and the outer wall of the middle sleeve 2 is in sliding contact with the second sliding block 6; the first connecting piece 4 comprises a force receiving part 41 and a connecting part 42, the connecting part 42 is arranged in the middle sleeve 2 and the first sliding block 5, and the force receiving part 41 is located outside the middle sleeve 2; when the first sliding block 5 is assembled, the force receiving part 41 is forced to drive the connecting part 42 to pass through the middle sleeve 2 and the first sliding block 5, so as to fixedly connect the middle sleeve 2 and the first sliding block 5; the first sliding block 5 reduces the friction of the relative movement of the middle sleeve 2 and the inner sleeve 3, improves the telescopic smoothness and stability of the inner sleeve 3, and the second sliding block 6 reduces the friction of the relative movement of the middle sleeve 2 and the outer sleeve 1, improves the telescopic smoothness and stability of the middle sleeve 2. The port of the outer sleeve 1 is formed with an avoiding gap 10, and the force receiving part 41 is located in the avoiding gap 10 when the middle sleeve 2 is in the retracted state relative to the outer sleeve 1. By arranging the avoiding gap 10 at the port of the outer sleeve 1, when the middle sleeve 2 is retracted into the outer sleeve 1, the force receiving part 41 of the first connecting piece 4 is located in the avoiding gap 10, which avoids the interference between the first connecting piece 4 and the port of the outer sleeve 1 and the first sliding block 5, affects the retractable length of the middle sleeve 2, and does not need to avoid the second sliding block 6, so that the second sliding block 6 can be arranged as close to the port of the outer sleeve 1 as possible, improving the sliding smoothness and stability of the middle sleeve 2, and avoiding the distribution of the first sliding block 5 and the second sliding block 6 being limited to affect the working effect. That is, the arrangement of the avoiding gap 10 of the outer sleeve 1 can effectively avoid the interference between the first connecting piece 4 and the second sliding block 6, and when the first sliding block 5 and the second sliding block 6 are assembled, the second sliding block 6 and the first sliding block 5 do not need to be staggered, thereby facilitating the increase of the number and width of the first sliding block 5 and the second sliding block 6, thereby improving the telescopic stability and reliability of the telescopic arm of the high-altitude operation vehicle. For example, two first sliding blocks 5 are arranged in the middle sleeve 2 in parallel and at intervals along a first direction; two second sliding blocks 6 are also arranged in the outer sleeve 1 in parallel and at intervals along the first direction, and the first direction is perpendicular to the sliding direction of the inner sleeve 3 and the middle sleeve 2. Of course, in other embodiments, the number of the first sliding block 5 and the second sliding block 6 can be set according to actual needs, such as three, four, etc.

[0033] In this embodiment, the first connecting member 4 is a bolt, the connecting part 42 is the shank of the bolt, and the force-bearing part 41 is the head of the bolt. The shank is threadedly connected to the middle sleeve 2 and the first slider 5. When assembling the first slider 5, the bolt is screwed into the middle sleeve 2 and the first slider 5 until the head of the bolt abuts against the outer wall of the middle sleeve 2, making the connection between the first slider 5 and the middle sleeve 2 stable and reliable. When the middle sleeve 2 is retracted into the outer sleeve 1, the head of the bolt enters the clearance notch 10, preventing interference or collision with the end of the outer sleeve 1 and preventing collision with the second slider 6, allowing the middle sleeve 2 to retract into the outer sleeve 1 to the maximum extent and facilitating the installation of the second slider 6. The number of the first connecting members 4 can be one, two, three, or more, depending on actual needs.

[0034] In this embodiment, the second connector 7 is preferably a bolt, that is, the second connector 7 is threadedly connected to the outer sleeve 1 and the second slider 6. The connection is stable and reliable, and easy to assemble and disassemble.

[0035] Furthermore, such as Figure 3 and Figure 5 As shown, a second reinforcing skirt 9 is formed on the outer edge of the port of the middle sleeve 2 to increase the structural strength of the middle sleeve 2, and when the middle sleeve 2 retracts into the outer sleeve 1, the second reinforcing skirt 9 abuts against the port of the outer sleeve 1 to avoid interference between the middle sleeve 2 and the internal structure of the outer sleeve 1 when the middle sleeve 2 is completely retracted into the outer sleeve 1.

[0036] In this embodiment, as Figure 2 As shown, one part of the end face of the outer sleeve 1 is a plane 11 perpendicular to the axis of the outer sleeve 1, and the other part is a slope 12 forming a clearance notch 10. The slope 12 slopes from the end face of the outer sleeve 1 towards the root of the outer sleeve 1. When the middle sleeve 2 retracts into the outer sleeve 1, the second reinforcing skirt 9 abuts against the end face of the outer sleeve 1 with the plane 11, and the first connector 4 enters the clearance notch 10, so that the end face of the middle sleeve 2 is closer to the end face of the outer sleeve 1.

[0037] Preferably, such as Figure 3 and Figure 4 As shown, the outer edge of the port of the outer sleeve 1 is at least partially formed with a first reinforcing skirt 8, which increases the structural strength of the outer sleeve 1. When the middle sleeve 2 retracts into the outer sleeve 1, the second reinforcing skirt abuts against the first reinforcing skirt 8, which improves the overall structural stability and strength of the telescopic boom of the aerial work vehicle, and can effectively prevent the port of the outer sleeve 1 from scratching the first reinforcing skirt 8.

[0038] For example, the outer sleeve 1, the middle sleeve 2 and the inner sleeve 3 all have rectangular cross-sections. The second slider 6 is disposed on the bottom side wall of the outer sleeve 1, the first slider 5 is disposed on the bottom side wall of the middle sleeve 2, the end portions of the left and right sides of the outer sleeve 1 are inclined toward the bottom side wall, and the first reinforcing skirt 8 is disposed around the ends of the other parts excluding the bottom side wall of the outer sleeve 1.

[0039] In the embodiment, the first slider 5 and / or the second slider 6 is a nylon slider, which has excellent wear resistance, impact resistance, self-lubricity and low friction coefficient.

[0040] The embodiment also provides a high-altitude operation vehicle, which comprises the telescopic arm of the high-altitude operation vehicle described above, and has better telescopic stability and telescopic smoothness, i.e., the working stability and reliability of the high-altitude operation vehicle are higher.

[0041] It should be noted that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A telescopic boom for an aerial work platform, characterized in that, The outer sleeve, the middle sleeve and the inner sleeve are sleeved in sequence, a first slider is connected to the middle sleeve through a first connecting piece near a port of the middle sleeve, an outer wall of the inner sleeve is in sliding contact with the first slider, a second slider is connected to the outer sleeve through a second connecting piece near a port of the outer sleeve, and an outer wall of the middle sleeve is in sliding contact with the second slider. The first connecting piece comprises a connecting force receiving part and a connecting part, the connecting part is arranged in the middle sleeve and the first slider, and the force receiving part is arranged outside the middle sleeve. The port of the outer sleeve is formed with a avoiding gap, when the middle sleeve is in the retracted state relative to the outer sleeve, the force receiving part is located in the avoiding gap.

2. The high-altitude work truck telescoping boom of claim 1, wherein, The first connecting piece is a bolt, the connecting part is a rod part of the bolt, and the force receiving part is a head part of the bolt.

3. The high-altitude work vehicle telescopic jib of claim 1, wherein, The first slider is provided with two first sliders which are connected in the middle sleeve in parallel and at intervals along a first direction, and the first direction is perpendicular to the sliding direction of the inner sleeve.

4. The high-altitude work vehicle telescopic jib of claim 1, wherein, The end face of the port of the outer sleeve is partially a plane perpendicular to the axis of the outer sleeve, and the other part is an inclined surface to form the avoiding gap, and the inclined surface is inclined from the port of the outer sleeve to the root of the outer sleeve.

5. The high-altitude work vehicle telescopic jib of claim 1, wherein, The second slider is provided with two second sliders which are connected in the outer sleeve in parallel and at intervals along a first direction, and the first direction is perpendicular to the sliding direction of the middle sleeve.

6. The high altitude vehicle jib arm of claim 1, wherein, The second connecting piece is threadedly connected to the outer sleeve and the second slider.

7. A high place work vehicle boom according to any one of claims 1-6, characterized in that The outer edge of the port of the outer sleeve is at least partially formed with a first reinforcing skirt.

8. A high place work vehicle boom according to any one of claims 1-6, characterized in that The outer edge of the port of the middle sleeve is formed with a second reinforcing skirt.

9. A high altitude platform vehicle telescopic arm according to any one of claims 1-6, characterized in that, The first slider is a nylon slider.

10. An aerial work platform, characterized in that The aerial work platform comprises the telescopic arm of claim 1-9. The aerial work platform comprises the telescopic arm of claim 1-9.

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