Liftable telescopic air suction arm structure

Abstract

The utility model relates to a liftable telescopic air suction arm structure. The liftable telescopic air suction arm structure comprises a supporting seat, a first supporting beam, a second supporting beam, a mounting seat and a dust suction pipe. One end of the first supporting beam is rotatably installed on the supporting frame. One end of the second supporting beam is rotationally connected with one end of the first supporting beam away from the supporting frame. The rotating shaft at the joint of the first supporting beam and the supporting frame is parallel to the rotating shaft at the joint of the second supporting beam and the first supporting beam. The mounting base is mounted at one end of the second support beam away from the first support beam. The dust suction pipe is configured to be telescopic in the length direction of the dust suction pipe. The second supporting beam is constructed to be capable of driving the mounting base to ascend and descend. The lifting telescopic air suction arm structure can be flexibly applied to various welding occasions such as large workpiece welding, small workpiece welding and multi-welding-spot welding, the dust suction pipe can reach the position closer to a welding spot to conduct welding fume capturing, and a good welding fume capturing effect can still be achieved even if small air suction amount is adopted.

Description

Technical Field

[0001] This utility model relates to the technical field of welding fume treatment equipment, and in particular to a height-adjustable and telescopic suction arm structure. Background Technology

[0002] Welding technology is widely used in manufacturing and involves a variety of processes. Welding generates a large amount of welding fumes, which can harm the environment and the health of welding workers. Therefore, it is essential to capture and purify these fumes. Due to the diversity of welding processes and the variety of workpieces, both large and small, and the distance between some welding points (which are often too great for simple suction arms to reach), most workpieces require overhead cranes for transport. Furthermore, it is not feasible to install a fixed top suction hood above the workpiece. For some particularly large workpieces, the welding points are not fixed, making fume capture extremely difficult. Moreover, the closer the fume capture is to the top of the welding point, the smaller the required airflow and the better the effect. Utility Model Content

[0003] Therefore, it is necessary to provide a liftable and telescopic suction arm structure that can be applied to various welding occasions and achieve good welding fume capture effect with a small air volume.

[0004] A height-adjustable and telescopic suction arm structure includes:

[0005] Support frame;

[0006] The first support beam is rotatably mounted on the support frame at one end.

[0007] The second support beam has one end rotatably connected to the end of the first support beam away from the support frame; the axis of rotation at the connection between the first support beam and the support frame is parallel to the axis of rotation at the connection between the second support beam and the first support beam.

[0008] The mounting base is installed on the end of the second support beam away from the first support beam;

[0009] The suction pipe is configured to be retractable along its length; the suction pipe is respectively mounted on the first support beam, the second support beam and the mounting base;

[0010] The second support beam is configured to drive the mounting base to rise and fall.

[0011] In one embodiment, the support frame includes a fixed base and a column fixed to the fixed base; one end of the first support beam is rotatably mounted on the end of the column away from the fixed base; the fixed base is used to fix to the working surface of the welding operation.

[0012] In one embodiment, an intermediate short joint is further included; the two ends of the intermediate short joint are respectively rotatably connected to the end of the first support beam away from the support frame and the end of the second support beam away from the mounting base; the pivot at the connection between the intermediate short joint and the first support beam is arranged parallel to the pivot at the connection between the intermediate short joint and the second support beam.

[0013] In one embodiment, the second support beam includes a rotating connector, a support beam body, and a lifting drive; one end of the rotating connector is rotatably connected to the end of the first support beam away from the support frame, and the other end is rotatably connected to one end of the support beam body; the axis of rotation at the connection between the first support beam and the rotating connector is perpendicular to the axis of rotation at the connection between the support beam body and the rotating connector; the mounting base is installed at the end of the support beam body away from the rotating connector; the lifting drive is used to drive the support beam body to move the mounting base up and down.

[0014] In one embodiment, the end of the rotating connector away from the first support beam has a first rotating connection point and a second rotating connection point spaced apart in a direction perpendicular to the longitudinal direction of the first support beam; one end of the mounting base has a third rotating connection point and a fourth rotating connection point spaced apart in a direction perpendicular to the longitudinal direction of the first support beam; the support beam body includes a first connecting rod and a second connecting rod; the two ends of the first connecting rod are rotatably connected to the first rotating connection point and the third rotating connection point, respectively, and the two ends of the second connecting rod are rotatably connected to the second rotating connection point and the fourth rotating connection point, respectively; the first rotating connection point, the third rotating connection point, the fourth rotating connection point, and the second rotating connection point are arranged in a parallelogram; the lifting drive is used to drive the first connecting rod to swing up and down around the rotation axis of the first rotating connection point.

[0015] In one embodiment, the supporting beam body further includes a connecting rod; the two ends of the connecting rod are respectively rotatably connected to the first connecting rod and the second connecting rod, and are located between the first rotatable connection point and the third rotatable connection point.

[0016] In one embodiment, a fastener is fixed to both the first support beam and the second support beam; the end of each fastener away from the first support beam or the second support beam is detachably connected to the suction pipe.

[0017] In one embodiment, the suction pipe includes a first telescopic flexible hose, a first rigid hose, a second telescopic flexible hose, a second rigid hose, and a third telescopic flexible hose; both ends of the first rigid hose are respectively connected to one end of the first telescopic flexible hose and one end of the second telescopic flexible hose; both ends of the second rigid hose are respectively connected to one end of the second telescopic flexible hose away from the first rigid hose and one end of the third telescopic flexible hose; the first rigid hose is detachably connected to the fixing member on the first support beam; the second rigid hose is detachably connected to the fixing member on the second support beam; and the third telescopic flexible hose is detachably connected to the mounting base.

[0018] In one embodiment, a horn-shaped dust suction hood is installed at one end of the suction pipe near the mounting base.

[0019] In one embodiment, the vacuum hood includes a funnel-shaped hood body and a handle fixed to the hood body.

[0020] In the above-mentioned height-adjustable and telescopic suction arm structure, when the support frame is on the horizontal plane, the rotation axis at the connection between the first support beam and the support frame and the rotation axis at the connection between the second support beam and the first support beam are both in the vertical direction. Therefore, the first support beam can rotate in the horizontal plane relative to the support seat, and the second support beam can rotate in the horizontal plane relative to the first support beam. The movement of the second support beam can drive the mounting seat to be raised and lowered in the vertical direction. In use, the support frame is positioned in the welding work area. Workers can adjust the horizontal position of the mounting base within the welding work area and the distance between the mounting base and the support frame by rotating the first support beam and / or the second support beam in the horizontal plane. The height of the mounting base can be adjusted by moving the second support beam. By extending or shortening the length of the suction pipe, the opening at the end of the suction pipe closest to the mounting base can reach further locations, allowing the opening to reach different positions within the welding work area for fume capture. Therefore, the aforementioned height-adjustable and telescopic suction arm structure can be flexibly applied to various welding scenarios, including large workpiece welding, small workpiece welding, and multi-point welding. Furthermore, because the position of the mounting base and the length of the suction pipe are adjustable, the suction pipe can reach closer to the welding point for fume capture, achieving point-to-point capture. Even with a smaller suction volume, a good fume capture effect can still be achieved. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the liftable and telescopic suction arm in a preferred embodiment of the present invention.

[0022] Explanation of reference numerals in the detailed embodiments: 100, height-adjustable telescopic suction arm structure; 110, support frame; 111, fixed base; 112, column; 120, first support beam; 130, second support beam; 131, rotating connector; 1311, first rotating connection point; 1312, second rotating connection point; 132, main body of support beam; 1321, first connecting rod; 1322, second connecting rod; 1323, connecting rod; 133, lifting drive component; 140, mounting base; 141, third rotating connection point; 142, third rotating connection point; 150, suction pipe; 151, first telescopic hose; 152, first rigid pipe; 153, second telescopic hose; 154, second rigid pipe; 155, third telescopic hose; 160, intermediate short joint; 170, fixing component; 180, suction hood; 181, handle. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements. It is also understood that when an element is referred to as being "between" two elements, it may be the only one between the two elements, or there may be one or more intermediate elements.

[0026] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0027] Figure 1 The diagram illustrates the structure of a height-adjustable and telescopic suction arm according to one embodiment of the present invention. For ease of explanation, the accompanying drawings only show structures relevant to the embodiment of the present invention.

[0028] Please see Figure 1 The height-adjustable telescopic suction arm structure 100 in the preferred embodiment of this utility model includes a support frame 110, a first support beam 120, a second support beam 130, a mounting base 140, and a suction pipe 150.

[0029] One end of the first support beam 120 is rotatably mounted on the support frame 110. One end of the second support beam 130 is rotatably connected to the end of the first support beam 120 away from the support frame 110. The pivot point at the connection between the first support beam 120 and the support frame 110 is parallel to the pivot point at the connection between the second support beam 130 and the first support beam 120. The mounting base 140 is mounted on the end of the second support beam 130 away from the first support beam 120. The suction pipe 150 is configured to be retractable along its length. The suction pipe 150 is mounted on the first support beam 120, the second support beam 130, and the mounting base 140. The end of the suction pipe 150 near the support frame 110 is configured to connect to the duct of the dust removal system. The second support beam 130 is configured to drive the mounting base 140 to rise and fall.

[0030] The second support beam 130 can be a linkage mechanism, a scissor lift mechanism, or a crossbeam structure that can flip up and down, as long as it can drive the mounting base 140 to rise and fall through its own operation. The suction pipe 150 can be fixed to the first support beam 120 and the second support beam 130 respectively by binding, pipe clamping, spring clamping, bracket fixing, etc. The suction pipe 150 can be fixed to the mounting base 140 by binding, pipe clamping, etc., or it can be directly inserted or clamped to the mounting hole or clamping structure (such as a slot, spiral clamping mechanism, hinge clamping mechanism, etc.) formed on the mounting base 140.

[0031] In the aforementioned height-adjustable and telescopic suction arm structure 100, when the support frame 110 is in a horizontal plane, the rotation axes at the connection between the first support beam 120 and the support frame 110, and at the connection between the second support beam 130 and the first support beam 120, are both vertical. Therefore, the first support beam 120 can rotate relative to the support base in the horizontal plane, and the second support beam 130 can rotate relative to the first support beam 120 in the horizontal plane. The movement of the second support beam 130 can drive the mounting base 140 to rise and fall vertically. The horizontal rotation of the first support beam 120 relative to the support frame 110 and the horizontal rotation of the second support beam 130 relative to the first support beam 120 can be achieved by manual operation or mechanical drive.

[0032] In use, the support frame 110 is positioned in the welding work area (i.e., the support seat is placed or fixed on the ground or other load-bearing surface within the welding work area). The end of the suction pipe 150 near the support frame 110 is connected to the duct of the dust removal system. Operators can adjust the horizontal position of the mounting base 140 within the welding work area and the distance between the mounting base 140 and the support frame 110 by rotating the first support beam 120 and / or the second support beam 130 in the horizontal plane. The height of the mounting base 140 can be adjusted by moving the second support beam 130. The suction pipe 150 can be stretched or shortened to adjust its position. The opening at the end of the dust suction pipe 150 near the mounting base 140 can reach a farther position, allowing the opening at the end of the dust suction pipe 150 near the mounting base 140 to reach different spatial positions within the welding work area for welding fume capture. Therefore, the above-mentioned height-adjustable and telescopic suction arm structure 100 can be flexibly applied to various welding occasions such as welding large workpieces, welding small workpieces, and welding multiple welding points. At the same time, because the position of the mounting base 140 is adjustable and the length of the dust suction pipe 150 is also adjustable, the dust suction pipe 150 can reach a position closer to the welding point for welding fume capture, achieving point-to-point capture of welding fumes. Even with a smaller suction volume, a good welding fume capture effect can still be achieved.

[0033] In some embodiments, the support frame 110 includes a fixed base 111 and a column 112 fixed to the fixed base 111. One end of the first support beam 120 is rotatably mounted on the end of the column 112 away from the fixed base 111. The fixed base 111 is used to fix to the working surface of the welding operation. The working surface of the welding operation can be the ground or other load-bearing surfaces, such as the surface of a steel plate or a partition plate. The fixed base 111 can be fixed to the working surface by welding, screwing, anchor bolt connection, or pre-embedded parts.

[0034] Setting the support frame 110 as a fixed base 111 and a column 112 not only simplifies the structure of the support frame 110, but also allows the support frame 110 to be stably fixed on the working surface of the welding work area such as the ground and bearing surface, which improves the stability of the liftable telescopic suction arm structure 100. This reduces the probability of the liftable telescopic suction arm structure 100 shaking or tipping during the rotation of the first support beam 120, the rotation of the second support beam 130, and the extension and retraction of the suction pipe 150, thus improving the safety of use.

[0035] In some embodiments, the height-adjustable telescopic suction arm further includes a middle short joint 160. The two ends of the middle short joint 160 are rotatably connected to the end of the first support beam 120 away from the support frame 110 and the end of the second support beam 130 away from the mounting base 140, respectively. The pivot point at the connection between the middle short joint 160 and the first support beam 120 is parallel to the pivot point at the connection between the middle short joint 160 and the second support beam 130. Therefore, the first support beam 120 is rotatably connected to the second support beam 130 via the middle short joint 160, thus forming a three-section arm structure. The middle short joint 160 provides cushioning protection for the suction pipe 150 at the middle short joint 160, preventing excessive bending of the suction pipe 150 at this location and extending the service life of the suction pipe 150.

[0036] In some embodiments, the second support beam 130 includes a rotating connector 131, a support beam body 132, and a lifting drive 133. One end of the rotating connector 131 is rotatably connected to the end of the first support beam 120 away from the support frame 110, and the other end is rotatably connected to the end of the support beam body 132. The axis of rotation at the connection between the first support beam 120 and the rotating connector 131 is perpendicular to the axis of rotation at the connection between the support beam body 132 and the rotating connector 131. A mounting base 140 is mounted on the end of the support beam body 132 away from the rotating connector 131. The lifting drive 133 is used to drive the support beam body 132 to move the mounting base 140 up and down. The lifting drive 133 can be a power-providing structure such as an electric cylinder, a gas spring, or a hydraulic cylinder.

[0037] In actual use, the operator can make the second support beam 130 rotate in the horizontal plane relative to the first support beam 120 by making the rotating connector 131 rotate horizontally relative to the first support beam 120. The lifting drive 133 drives the support beam body 132 to swing up and down in the vertical plane relative to the rotating connector 131, so as to realize the lifting of the mounting base 140.

[0038] Further, in some embodiments, the end of the rotating connector 131 away from the first support beam 120 has a first rotating connection point 1311 and a second rotating connection point 1312 spaced apart along a direction perpendicular to the longitudinal direction of the first support beam 120. One end of the mounting base 140 has a third rotating connection point 142141 and a fourth rotating connection point spaced apart along a direction perpendicular to the longitudinal direction of the first support beam 120. The support beam body 132 includes a first connecting rod 1321 and a second connecting rod 1322. The two ends of the first connecting rod 1321 are rotatably connected to the first rotating connection point 1311 and the third rotating connection point 142141, respectively, and the two ends of the second connecting rod 1322 are rotatably connected to the second rotating connection point 1312 and the fourth rotating connection point, respectively. The first rotating connection point 1311, the third rotating connection point 142141, the fourth rotating connection point, and the second rotating connection point 1312 are arranged in a parallelogram. The lifting drive component 133 is used to drive the first connecting rod 1321 to swing up and down around the pivot of the first rotating connection point 1311.

[0039] Thus, the rotating connector 131, the first link 1321, the mounting base 140, and the second link 1322 form a parallelogram-shaped four-bar linkage. The lifting drive 133 drives the first link 1321 to swing up and down around the axis of the first rotating connection point 1311, thereby driving the second link 1322 to swing up and down synchronously, and driving the mounting base 140 to rise or fall vertically. The four-bar linkage ensures that the mounting base 140 rises and falls smoothly throughout the entire process and does not deflect with the first link 1321. This ensures that the installation direction of the suction pipe 150 at the mounting base 140 is always in the same direction, making it convenient for workers to move the suction pipe 150 to the welding point for welding fume capture.

[0040] Furthermore, in some embodiments, the support beam body 132 also includes a connecting rod 1323. The two ends of the connecting rod 1323 are rotatably connected to the first connecting rod 1321 and the second connecting rod 1322, respectively, and are located between the first rotatable connection point 1311 and the third rotatable connection point 142141. Therefore, the connecting rod 1323 is mainly used to connect the first connecting rod 1321 and the second connecting rod 1322 into a whole, improving the structural stability of the second support beam 130, thereby ensuring that the mounting base 140 can be raised and lowered smoothly.

[0041] In some embodiments, fasteners 170 are fixed to both the first support beam 120 and the second support beam 130. The end of each fastener 170 away from the first support beam 120 or the second support beam 130 is detachably connected to the suction pipe 150. Detachably fixing the suction pipe 150 to the end of the fastener 170 away from the first support beam 120 or the second support beam 130, such that the suction pipe 150 is spaced apart from the first support beam 120 and the second support beam 130 respectively, reduces the probability of wear on the suction pipe 150 during use, thus extending its service life. It also prevents heat from the suction pipe 150 from being conducted to the first support beam 120 and the second support beam 130 during welding fume capture, avoiding overheating and difficulty in rotation of the first and second support beams 120 and 130. This improves the ease of use and safety of the height-adjustable telescopic suction arm structure 100.

[0042] Further, in some embodiments, the suction pipe 150 includes a first telescopic flexible hose 151, a first rigid hose 152, a second telescopic flexible hose 153, a second rigid hose 154, and a third telescopic flexible hose 155. The two ends of the first rigid hose 152 are respectively connected to one end of the first telescopic flexible hose 151 and one end of the second telescopic flexible hose 153. The two ends of the second rigid hose 154 are respectively connected to the end of the second telescopic flexible hose 153 away from the first rigid hose 152 and one end of the third telescopic flexible hose 155. The first rigid hose 152 is detachably connected to a fastener 170 on the first support beam 120. The second rigid hose 154 is detachably connected to a fastener 170 on the second support beam 130. The third telescopic flexible hose 155 is detachably connected to a mounting base 140. The end of the first telescopic flexible hose 151 away from the first rigid hose 152 is configured to connect to the duct of the dust removal system.

[0043] Compared to the flexible hose, the arrangement of the first rigid tube 152 and the second rigid tube 154 makes the suction tube 150 more effectively and easier to fix on the first support beam 120 and the second support beam 130, respectively, reducing the difficulty of fixing the suction tube 150 on the first support beam 120 and the second support beam 130.

[0044] To ensure the effective fixation of the suction pipe 150 on the first support beam 120 and the second support beam 130, both the first support beam 120 and the second support beam 130 are fixed with multiple fasteners 170 at intervals along their respective longitudinal directions. The first rigid pipe 152 is detachably fixed to the multiple fasteners 170 on the first support beam 120, and the second rigid pipe 154 is detachably fixed to the multiple fasteners 170 on the second support beam 130.

[0045] In some embodiments, a funnel-shaped dust hood 180 is installed at the end of the suction pipe 150 near the mounting base 140. The dust hood 180 has a funnel-shaped structure that is wider at the outside and narrower at the inside, meaning that the smaller end of the dust hood 180 is connected to the end of the suction pipe 150 near the mounting base 140. The dust hood 180 increases the fume capture area of ​​the suction pipe 150 at the welding point, allowing for the capture of more welding fumes even under conditions of limited air pressure within the suction pipe 150, thus further improving the fume capture effect.

[0046] Furthermore, in some embodiments, the dust hood 180 includes a trumpet-shaped hood body and a handle fixed to the hood body. The handle 181 is mainly designed for easy gripping by workers. In actual use, workers can hold the handle 181 and move the dust hood 180 to any welding point where welding fumes are to be captured by pulling or pushing, further improving the ease of use of the aforementioned height-adjustable and telescopic suction arm structure 100.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A height-adjustable and telescopic suction arm structure, characterized in that, include: Support frame; The first support beam is rotatably mounted on the support frame at one end. The second support beam is rotatably connected at one end to the end of the first support beam that is away from the support frame; The pivot point at the connection between the first support beam and the support frame is parallel to the pivot point at the connection between the second support beam and the first support beam; The mounting base is installed on the end of the second support beam away from the first support beam; The suction pipe is configured to be retractable along its length; the suction pipe is respectively mounted on the first support beam, the second support beam and the mounting base; The second support beam is configured to drive the mounting base to rise and fall.

2. The height-adjustable and telescopic suction arm structure according to claim 1, characterized in that, The support frame includes a fixed base and a column fixed to the fixed base; one end of the first support beam is rotatably mounted on the end of the column away from the fixed base; the fixed base is used to fix to the working surface of the welding operation.

3. The height-adjustable and telescopic suction arm structure according to claim 1, characterized in that, It also includes an intermediate short joint; the two ends of the intermediate short joint are respectively rotatably connected to the end of the first support beam away from the support frame and the end of the second support beam away from the mounting base; the pivot of the connection between the intermediate short joint and the first support beam is arranged parallel to the pivot of the connection between the intermediate short joint and the second support beam.

4. The height-adjustable and telescopic suction arm structure according to claim 1, characterized in that, The second support beam includes a rotating connector, a support beam body, and a lifting drive component; one end of the rotating connector is rotatably connected to the end of the first support beam away from the support frame, and the other end is rotatably connected to one end of the support beam body; the axis of rotation at the connection between the first support beam and the rotating connector is perpendicular to the axis of rotation at the connection between the support beam body and the rotating connector; the mounting base is installed at the end of the support beam body away from the rotating connector; the lifting drive component is used to drive the support beam body to move the mounting base up and down.

5. The height-adjustable and telescopic suction arm structure according to claim 4, characterized in that, The rotating connector has a first rotating connection point and a second rotating connection point spaced apart along a direction perpendicular to the longitudinal direction of the first support beam at one end; the mounting base has a third rotating connection point and a fourth rotating connection point spaced apart along a direction perpendicular to the longitudinal direction of the first support beam at one end; the support beam body includes a first connecting rod and a second connecting rod; the two ends of the first connecting rod are rotatably connected to the first rotating connection point and the third rotating connection point respectively, and the two ends of the second connecting rod are rotatably connected to the second rotating connection point and the fourth rotating connection point respectively; the first rotating connection point, the third rotating connection point, the fourth rotating connection point, and the second rotating connection point are arranged in a parallelogram; the lifting drive is used to drive the first connecting rod to swing up and down around the rotation axis of the first rotating connection point.

6. The height-adjustable and telescopic suction arm structure according to claim 5, characterized in that, The main body of the support beam also includes a connecting rod; the two ends of the connecting rod are respectively rotatably connected to the first connecting rod and the second connecting rod, and are located between the first rotatable connection point and the third rotatable connection point.

7. The height-adjustable and telescopic suction arm structure according to claim 1, characterized in that, Both the first support beam and the second support beam are fixed with fasteners; the end of each fastener away from the first support beam or the second support beam is detachably connected to the suction pipe.

8. The height-adjustable and telescopic suction arm structure according to claim 7, characterized in that, The vacuum hose includes a first telescopic flexible hose, a first rigid hose, a second telescopic flexible hose, a second rigid hose, and a third telescopic flexible hose; both ends of the first rigid hose are respectively connected to one end of the first telescopic flexible hose and one end of the second telescopic flexible hose; both ends of the second rigid hose are respectively connected to one end of the second telescopic flexible hose away from the first rigid hose and one end of the third telescopic flexible hose; the first rigid hose is detachably connected to the fixing member on the first support beam; the second rigid hose is detachably connected to the fixing member on the second support beam; and the third telescopic flexible hose is detachably connected to the mounting base.

9. The height-adjustable and telescopic suction arm structure according to claim 1, characterized in that, A horn-shaped dust suction cover is installed at one end of the suction pipe near the mounting base.

10. The height-adjustable and telescopic suction arm structure according to claim 9, characterized in that, The vacuum hood includes a funnel-shaped hood body and a handle fixed to the hood body.

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