Telescopic arm and aerial work platform
The modular design of the telescopic boom structure solves the problems of difficult assembly and inconvenient maintenance of telescopic booms for boom-type aerial work platforms, achieving the effects of simplified assembly and improved maintenance efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-03-20
AI Technical Summary
The telescopic boom structure of existing boom-type aerial work platforms is complex, which makes assembly difficult and is not conducive to later maintenance. In particular, the cable chain is easily damaged in corrosive and polluted environments, resulting in high maintenance costs.
A modular telescopic boom structure is designed, with the telescopic cylinders of the two-section boom and the three-section boom arranged in series. The cable chain motion mechanism is pre-assembled on the outside of the boom, and the internal cylinders and cable chain mechanism are distributed on the left and right sides to avoid interference, realize individual operation and simplify assembly.
The modular assembly of the telescopic boom simplifies the assembly process, improves maintenance convenience, reduces maintenance costs, and adapts to complex working conditions.
Smart Images
Figure CN224015210U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to cantilever structure technical field, specifically speaking, a telescopic arm and aerial work platform. BACKGROUND
[0002] The arm type aerial work platform is the construction tool in the engineering construction field, and has wider working condition adaptability and stronger function. The structure and function of the arm type aerial work platform need to be continuously updated and optimized to meet diversified construction requirements.
[0003] The telescopic arm of the arm type aerial work platform is mainly realized by the movement of the telescopic mechanism. At present, hydraulic drive is mainly used, and the telescopic mechanism of the telescopic arm is realized through telescopic oil cylinder and hydraulic oil circuit. On the basis of hydraulic drive, the telescopic mechanism of the telescopic arm can be realized through the mechanism such as steel wire rope or chain, such as common three-section arm, four-section arm, etc.
[0004] In the telescopic process of the arm, the cable and oil pipe need to move with the arm, and the internal cable and oil pipe need to be protected, which needs to be realized through the drag chain.
[0005] According to the different positions of the telescopic mechanism and the drag chain, it is mainly divided into two kinds: one is the outer side of the arm, and the other is the inner side of the arm. The telescopic mechanism and the drag chain are arranged on the outer side of the arm, which is simple in assembly and convenient in maintenance, but has limitations in complex working conditions, especially in corrosive and polluted use environment, which can cause damage to the oil pipe bundle in the drag chain, is difficult to keep clean, and has high maintenance cost. The telescopic mechanism and the drag chain are arranged in the arm, which has good protection for the oil cylinder and the drag chain, smaller machine external size, simple appearance, and is convenient for narrow space construction, but the telescopic mechanism and the drag chain have the defects of complex structure, difficult assembly and inconvenient maintenance. INVENTION CONTENTS
[0006] In order to solve the problems of complex structure of the telescopic arm inner wall, difficult assembly and inconvenient maintenance, the utility model provides a telescopic arm and aerial work platform.
[0007] The utility model is realized through the following technical schemes:
[0008] A telescopic arm, comprising a one-section arm, a two-section arm and a three-section arm, the two-section arm and the three-section arm are sequentially sleeved in the one-section arm;
[0009] The one-section arm is provided with a two-section arm telescopic oil cylinder for driving the two-section arm to realize telescopic movement; the two-section arm is provided with a three-section arm telescopic oil cylinder for driving the three-section arm to realize telescopic movement;
[0010] The two-section arm telescopic oil cylinder and the three-section arm telescopic oil cylinder are connected in series;
[0011] The one-section arm is internally provided with a drag chain movement mechanism for guiding the oil pipeline bundle.
[0012] The telescopic oil cylinder and the drag chain movement mechanism are modularly assembled, and can be assembled outside the arm frame in advance, so that the modular assembly is simple, efficient and convenient to maintain.
[0013] The telescopic oil cylinder of the two-section arm comprises a cylinder and a piston rod slidingly arranged in the cylinder.
[0014] The telescopic oil cylinder of the three-section arm comprises a cylinder and a piston rod slidingly arranged in the cylinder.
[0015] The large cavity of the telescopic oil cylinder of the two-section arm is in communication with the large cavity of the telescopic oil cylinder of the three-section arm, and the small cavity of the telescopic oil cylinder of the two-section arm is in communication with the small cavity of the telescopic oil cylinder of the three-section arm.
[0016] The telescopic oil cylinder of the two-section arm is provided with a balance valve connected with the hydraulic oil circuit of the whole vehicle.
[0017] The telescopic oil cylinder of the two-section arm and the telescopic oil cylinder of the three-section arm are arranged in an up-down manner.
[0018] The telescopic oil cylinder of the two-section arm and the telescopic oil cylinder of the three-section arm form a telescopic mechanism, and the telescopic mechanism and the drag chain movement mechanism are distributed in a left-right manner inside, so that interference and collision of the two mechanisms during movement are avoided.
[0019] The drag chain movement mechanism comprises a primary rectangular pipe, a drag chain body and a secondary rectangular pipe.
[0020] The further improvement of the utility model still has, the above-mentioned drag chain movement mechanism still includes two-section support assembly, the two-section support assembly is installed on the two-section arm and is to the first-stage square tube guide.
[0021] The further improvement of the utility model still has, the above-mentioned two-section support assembly is composed of two open U-shaped plates.
[0022] A kind of aerial work platform, including the telescopic arm shown in the description.
[0023] From the above technical solution, the beneficial effects of the utility model are that: the telescopic arm inside the telescopic oil cylinder and the drag chain movement mechanism can form modular assembly, and both can be assembled in advance outside the arm frame, realize modular assembly, simple assembly, high efficiency, convenient maintenance;Two-section arm telescopic oil cylinder and three-section arm telescopic oil cylinder are connected in series, can realize the local section arm to form individual operation. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the technical scheme of the utility model, the drawings needed to be used in the description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.
[0025] Figure 1 It is the structure schematic view of telescopic arm for the specific embodiment of the utility model.
[0026] Figure 2 It is the first hydraulic system schematic view of telescopic mechanism for the specific embodiment of the utility model.
[0027] Figure 3 It is the second hydraulic system structure schematic view of telescopic mechanism for the specific embodiment of the utility model.
[0028] Figure 4 It is the drag chain movement mechanism schematic view for the specific embodiment of the utility model.
[0029] Figure 5 It is the internal structure schematic view of telescopic arm for the specific embodiment of the utility model.
[0030] Figure 6 It is Figure 5 It is the A-A section schematic view of telescopic arm shown.
[0031] Figure 7 It is Figure 5 It is the B-B section schematic view of telescopic arm shown.
[0032] In the drawings: 1, one-section arm, 2, two-section arm, 3, three-section arm, 4, telescopic mechanism, 5, drag chain movement mechanism,
[0033] 4.1, two-section arm telescopic oil cylinder, 4.2, three-section arm telescopic oil cylinder, 4.1.1, cylinder one, 4.1.2, piston rod one, 4.1.3, balance valve, 4.2.1, cylinder two, 4.2.2, piston rod two, 4.2.3, sequence valve,
[0034] 5.1, primary rectangular tube, 5.2, drag chain body, 5.3, secondary rectangular tube, 5.4 two-section support assembly. DETAILED DESCRIPTION
[0035] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be described clearly and completely in combination with the drawings in the specific embodiment. Obviously, the following described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the patent, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the patent.
[0036] As shown in Figure 1 and 5 The utility model discloses a telescopic arm, including one section arm 1, two section arm 2 and three section arm 3, two section arm 2 and three section arm 3 are in turn set in one section arm 1, and the telescopic of two section arm 2 and three section arm 3 in one section arm 1 is controlled through telescopic mechanism 4. Telescopic mechanism 4 includes two section arm telescopic oil cylinder 4.1 and three section arm telescopic oil cylinder 4.2. One section arm 1 is equipped with two section arm telescopic oil cylinder 4.1 of driving two section arm 2 realizes telescopic, and two section arm 2 is equipped with three section arm telescopic oil cylinder 4.2 of driving three section arm 3 realizes telescopic. Two section arm telescopic oil cylinder 4.1 and three section arm telescopic oil cylinder 4.2 are in series setting.
[0037] Two section arm telescopic oil cylinder 4.1 includes cylinder one 4.1.1 and piston rod one 4.1.2 of sliding setting in cylinder one 4.1.1, and the one end of cylinder one 4.1.1 away from piston rod one 4.1.2 is connected two section arm 2, and the one end of piston rod one 4.1.2 away from cylinder one 4.1.1 is connected one section arm 1. Three section arm telescopic oil cylinder 4.2 includes cylinder two 4.2.1 and piston rod two 4.2.2 of sliding setting in cylinder two 4.2.1, and the one end of cylinder two 4.2.1 away from piston rod two 4.2.2 is connected three section arm 3, and the one end of piston rod two 4.2.2 away from cylinder two 4.2.1 is connected two section arm 2.
[0038] As shown in Figure 4As shown, the large chamber of the two-section telescopic cylinder 4.1 is connected to the large chamber of the three-section telescopic cylinder 4.2, and the small chamber of the two-section telescopic cylinder 4.1 is connected to the small chamber of the three-section telescopic cylinder 4.2.
[0039] like Figures 2-3 As shown, the two-section boom telescopic cylinder 4.1 is equipped with a balance valve 4.1.3 that connects to the hydraulic circuit of the whole vehicle; the three-section boom telescopic cylinder 4.2 is equipped with a sequence valve 4.2.3 that connects to the two-section boom telescopic cylinder 4.1 through a pipeline.
[0040] like Figure 2 As shown, the telescopic boom can extend in unison or individually according to actual needs (in this case, each boom section can extend independently; taking a three-section boom as an example: when the second boom section 2 extends alone, the third boom section 3 is relatively stationary relative to the second boom section 2; when the third boom section 3 extends, it extends simultaneously with the second boom section 2, that is, the third boom section 3 extends outward relative to the second boom section 2, and the second boom section 2 extends outward relative to the first boom section 1). The second boom telescopic cylinder 4.1 has a balance valve 4.1.3 connected to the vehicle's hydraulic circuit, and the third boom telescopic cylinder 4.2 has a sequence valve 4.2.3 connected to the second boom telescopic cylinder 4.1 via an oil pipe. When the pressure is lower than the set value of the sequence valve 4.2.3, the second boom telescopic cylinder 4.1 operates independently, that is, the second boom section 2 extends while the third boom section 3 remains relatively stationary. When the pressure is higher than the set value of the sequence valve 4.2.3, the three-section boom telescopic cylinder 4.2 and the two-section boom telescopic cylinder 4.1 act simultaneously, that is, the two-section boom 2 extends while the three-section boom 3 extends.
[0041] like Figure 3 As shown, when the telescopic boom is a four-section boom, the hydraulic circuit is equipped with a first sequence valve 4.2.3 and a second sequence valve 4.2.3, each with its own pressure setting. If the pressure setting of the first sequence valve 4.2.3 equals that of the second sequence valve 4.2.3, when the pressure of the third section boom 3 is higher than that of the first sequence valve 4.2.3, the third and fourth sections boom operate simultaneously. If the pressure setting of the first sequence valve 4.2.3 is lower than that of the second sequence valve 4.2.3, when the pressure of the third section boom 3 is higher than that of the first sequence valve 4.2.3, the third section boom 3 operates independently, and when the pressure of the fourth section boom is higher than that of the second sequence valve 4.2.3, the fourth section boom operates independently. The differential balance valve 4.1.3 is used to introduce oil from the small chamber into the large chamber when the flow is insufficient, achieving the required cylinder travel speed for the entire machine. The balance valve 4.1.3 is used to enable the cylinder to achieve soft start, soft stop, and smooth movement. The sequence valve 4.2.3 is used to limit the sequence of movements by setting a pressure value.
[0042] like Figures 4-6As shown, the one-section arm 1 is further provided with a drag chain 5.2 movement mechanism for guiding the oil pipeline bundle. The two-section arm telescopic oil cylinder 4.1 and the three-section arm telescopic oil cylinder 4.2 are arranged in up-down direction. This helps to optimize the internal structure layout. The two-section arm telescopic oil cylinder 4.1 and the three-section arm telescopic oil cylinder 4.2 constitute a telescopic mechanism 4, and the telescopic mechanism 4 and the drag chain 5.2 movement mechanism 5 are distributed in left-right direction inside, so as to avoid interference and collision of the two mechanisms during movement.
[0043] As shown in the drawings, Figure 4 The drag chain 5.2 movement mechanism 5 comprises a first rectangular tube 5.1, a drag chain body 5.2 and a second rectangular tube 5.3. The first rectangular tube 5.1 and the second rectangular tube 5.3 are connected through the drag chain body 5.2. One end of the first rectangular tube 5.1 away from the drag chain body 5.2 is fixedly connected to the one-section arm 1, and the second rectangular tube 5.3 is connected to the three-section arm 3. When the telescopic arm is synchronously extended or retracted, the hydraulic oil pipe and the electric wire arranged in the drag chain 5.2 movement mechanism 5 will move together with the telescopic arm.
[0044] The drag chain 5.2 movement mechanism 5 further comprises a two-section support assembly 5.4, which is installed on the two-section arm 2 and guides the first rectangular tube 5.1.
[0045] The two-section support assembly 5.4 is composed of two U-shaped plates with open opposite sides and made of nylon material.
[0046] The telescopic arm and the aerial work platform.
[0047] The telescopic arm and the aerial work platform.
[0048] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A telescopic boom, comprising a first boom section (1), a second boom section (2), and a third boom section (3), characterized in that, The two-section arm (2) and the three-section arm (3) are sequentially sleeved inside the one-section arm (1); the one-section arm (1) is provided with a two-section arm telescopic cylinder (4.1) for driving the two-section arm (2) to extend and retract; the two-section arm (2) is provided with a three-section arm telescopic cylinder (4.2) for driving the three-section arm (3) to extend and retract; the two-section arm telescopic cylinder (4.1) and the three-section arm telescopic cylinder (4.2) are connected in series; the one-section arm (1) is also provided with a drag chain motion mechanism (5) for guiding the oil pipeline harness.
2. A telescopic boom according to claim 1, characterized in that, The two-section boom telescopic cylinder (4.1) includes a cylinder barrel (4.1.1) and a component slidably disposed within the cylinder barrel (4.1.1). Piston rod 1 (4.1.2) inside 4.1.1); the end of cylinder 1 (4.1.1) away from piston rod 1 (4.1.2) is connected to the second arm (2), and the end of piston rod 1 (4.1.2) away from cylinder 1 (4.1.1) is connected to the first arm (1).
3. A telescopic boom according to claim 2, characterized in that, The three-section telescopic cylinder (4.2) includes a cylinder barrel two (4.2.1) and a piston rod two (4.2.2) slidably disposed in the cylinder barrel two (4.2.1); the end of the cylinder barrel two (4.2.1) away from the piston rod two (4.2.2) is connected to the three-section arm (3), and the end of the piston rod two (4.2.2) away from the cylinder barrel two (4.2.1) is connected to the two-section arm (2).
4. A telescopic arm according to claim 3, characterized in that, The large cavity of the two-section telescopic cylinder (4.1) is connected to the large cavity of the three-section telescopic cylinder (4.2), and the small cavity of the two-section telescopic cylinder (4.1) is connected to the small cavity of the three-section telescopic cylinder (4.2).
5. A telescopic arm according to claim 4, characterized in that, The two-section boom telescopic cylinder (4.1) is equipped with a balance valve (4.1.3) that connects to the hydraulic circuit of the whole vehicle; the three-section boom telescopic cylinder (4.2) is equipped with a sequence valve (4.2.3) that connects to the two-section boom telescopic cylinder (4.1) through a pipeline.
6. A telescopic boom according to claim 1, characterized in that, The two-section boom telescopic cylinder (4.1) and the three-section boom telescopic cylinder (4.2) are arranged vertically.
7. A telescopic boom according to claim 1, characterized in that, The cable chain motion mechanism (5) includes a primary rectangular tube (5.1), a cable chain body (5.2), and a secondary rectangular tube (5.3); the primary rectangular tube (5.1) and the secondary rectangular tube (5.3) are connected through the cable chain body (5.2); one end of the primary rectangular tube (5.1) away from the cable chain body (5.2) is fixedly connected to a section arm (1), and the secondary rectangular tube (5.3) is connected to a third section arm (3).
8. A telescopic boom according to claim 7, characterized in that, The drag chain motion mechanism (5) also includes a two-section support assembly (5.4), which is mounted on the two-section arm (2) and guides the first-stage rectangular tube (5.1).
9. A telescopic boom according to claim 8, characterized in that, The two-section support assembly (5.4) consists of two U-shaped plates with opposite openings.
10. An aerial work platform, characterized in that, Includes the telescopic arm as described in any one of claims 1 to 9.