Mechanical arm for paint spraying of steel box girder

Abstract

The utility model relates to the technical field of steel box girder construction, in particular to a steel box girder paint spraying mechanical arm which comprises a vertical frame, concave frames are fixed on the inner side of the vertical frame, hinge frames are hinged to the opposite sides of the concave frames, an outer pipe is fixed between the two hinge frames, an inner pipe is connected into the outer pipe in a sleeved mode, and a sprayer is installed at the head end of the inner pipe. A telescopic assembly for driving the inner pipe to move is installed in the outer pipe, a frame is fixed to the outer side of the outer pipe, and a vertical frame is rotationally connected to the frame. According to the mechanical arm for paint spraying of the steel box girder, the sprayer is moved to the position close to the steel box girder, then the sprayer is matched with operation of the lead screw device, the outer pipe can be driven to operate in a fan shape, and therefore the sprayer can be driven to complete spraying from top to bottom or from bottom to top; and the telescopic assembly can be matched with angle adjustment to drive the sprayer to keep the distance from the steel box girder, so that automatic spraying can be achieved, and meanwhile the situation that the distance of the sprayer is changed to affect the spraying effect can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of steel box girder construction, in particular to a mechanical arm for spraying paint on a steel box girder. Background Art

[0002] In the field of bridge construction and maintenance, steel box girders are a common structural component. Their surface treatment, especially paint spraying, is crucial to protecting the beam from corrosion and increasing the service life of the bridge. Traditional paint spraying methods mostly use manual operation or simple mechanical assistance, or multi-axis robotic arms. However, steel box girders are bridge components with large volumes, and manual or simple mechanical assistance is inefficient. Although multi-axis robotic arms are existing equipment with flexible operation, they are expensive, relatively small in size, and not very suitable for spraying steel box girders. With the continuous expansion of bridge construction and technological advancement, traditional spraying processes can no longer meet the needs of modern engineering, prompting the industry to explore more efficient and environmentally friendly spraying technologies. Utility Model Content

[0003] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mechanical arm for paint spraying of steel box girders, comprising a vertical frame, a recessed frame is fixed on the inner side of the vertical frame, hinge frames are hinged on the opposite sides of the recessed frame, an outer tube is fixed between the two hinge frames, an inner tube is sleeved inside the outer tube, a sprayer is installed at the head end of the inner tube, a telescopic assembly for driving the inner tube to move is installed in the outer tube, a frame is fixed on the outer side of the outer tube, a vertical frame is rotatably connected to the frame, a screw device is installed on the inner side of the vertical frame, and one end of the recessed frame is hinged with a hinge block fixed to a nut of the screw device.

[0004] Furthermore, a crossbeam is fixed between the two frame rods in the vertical frame.

[0005] Furthermore, one side of the crossbeam is hinged with a follower cylinder which is hinged with one side of the frame.

[0006] Furthermore, the telescopic assembly includes a screw rod portion installed on the inner side of the outer tube, the nut end of the screw rod portion is fixed to the inner side of the inner tube, a panel and a motor are fixed to the top of the rear end of the outer tube, an upper gear rotatably connected to the motor shaft is installed on the panel, and a lower gear meshing with the upper gear is fixed to the outer side of the rear end of the screw rod portion.

[0007] Furthermore, the outer tube and the inner tube are both square in shape, and anti-collision blocks are fixed to the four inner walls of the outer tube opening and the four outer walls of the inner tube tail opening.

[0008] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0009] The robot arm for spraying paint on the steel box girder can drive the outer tube to move in a fan shape by moving the sprayer to a position close to the steel box girder and then cooperating with the operation of the screw device, thereby driving the sprayer to complete the spraying from top to bottom or from bottom to top. During the spraying process, the telescopic component can cooperate with the angle adjustment to drive the sprayer to maintain a distance from the steel box girder, thereby realizing automatic spraying and preventing changes in the distance of the sprayer from affecting the spraying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 It is a rear cross-sectional view of the utility model;

[0012] Figure 3 It is a three-dimensional diagram of the frame connection structure in the utility model.

[0013] In the figure: 1, vertical frame; 2, cross beam; 3, recessed frame; 4, outer tube; 5, enclosure; 6, motor; 7, upper gear; 8, screw rod; 9, lower gear; 10, inner tube; 11, sprayer; 12, frame; 13, vertical frame; 14, hinge block; 15, screw rod device; 16, follower cylinder; 17, anti-collision block; 18, hinge frame. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-3 A mechanical arm for paint spraying of a steel box girder in this embodiment includes a vertical frame 1 formed by four frame rods, and the vertical frame 1 can be installed on an external rail car. A recessed frame 3 is fixed between the four frame rods of the vertical frame 1, and hinge frames 18 are hinged on opposite sides of the recessed frame 3. An outer tube 4 is fixed between the two hinge frames 18. An inner tube 10 is sleeved inside the outer tube 4. Both the outer tube 4 and the inner tube 10 are square. A sprayer 11 is installed at the head end of the inner tube 10, and a telescopic component for driving the inner tube 10 to move is installed in the outer tube 4. A frame 12 is fixed to the outside of the outer tube 4, and a vertical frame 13 is rotatably connected to the frame 12. A screw device 15 is installed on the inner side of the vertical frame 13, and a hinge block 14 fixed to the left end of the recessed frame 3 is hinged to a nut of the screw device 15.

[0016] In the above structure, first, the frame is installed on the rail car, and the adjustable position can be formed by the rail car. Then, the telescopic component can drive the inner tube to advance and retract, so that the sprayer can be close to the steel box girder for a certain distance to complete the spraying. Then, through the operation of the screw device, in conjunction with the vertical frame and the hinge block, the screw device can be prevented from moving first, and the outer tube can be driven to complete the angle adjustment. During the angle adjustment process, the telescopic component cooperates to complete the telescopic extension, and can maintain the distance between the sprayer and the steel box girder to complete the spraying. Therefore, automated spraying can be achieved to improve efficiency, and the thickness of the spraying can be guaranteed to be consistent to improve the effect.

[0017] like Figure 1 As shown, a crossbeam 2 is fixed between the front frame rod bracket and the back frame rod in the stand 1. The crossbeam supports the stand, thereby improving the stability and firmness of the stand.

[0018] like Figure 2 As shown, the telescopic assembly includes a screw rod part 8 rotatably mounted on the inner side of the outer tube 4, the screw rod part 8 is composed of a bearing, a screw rod and a nut, the nut end of the screw rod part 8 is fixed to the inner side of the tube mouth of the tail tube of the inner tube 10, and one end of the screw rod in the screw rod part 8 extends to the inner tube 10 with the bearing to slide, and the outer side of the bearing located in the inner tube 10 is square, the top of the tail end of the outer tube 4 is fixed with a shroud 5 and a motor 6 is installed, the shroud 5 is rotatably connected with an upper gear 7 connected to the rotating shaft of the motor 6, and the outer side of the screw rod tail end of the screw rod part 8 is fixed with a lower gear 9 meshing with the upper gear 7. The upper gear is driven to rotate by the motor, and the upper gear drives the screw rod to rotate through the meshing transmission of the lower gear. Under the direction of the outer tube and the inner tube, it can limit the inner tube and prevent the inner tube from rotating. Therefore, the inner tube can be driven to telescope inside the outer tube through the nut, thereby completing the telescopic operation of adjusting the sprayer.

[0019] The inner and outer sides of the outer tube 4 and the inner tube 10 are both square, and anti-collision blocks 17 are fixed to the inner four walls of the outer tube 4 and the outer four walls of the tail of the inner tube 10. The anti-collision blocks can play a limiting role to prevent the inner tube from moving out too much. At the same time, the anti-collision blocks can also prevent the gap between the inner tube and the outer tube from colliding, affecting the telescopic effect and causing damage to the tube body, thereby playing a role of limiting and protecting.

[0020] like Figure 3 As shown, one of the crossbeams 2 is hinged with a follower cylinder 16 hinged to one side of the frame 12. The follower cylinder can complete the ejection and retraction operations along with the operation of the screw device, thereby improving the stability of the angle adjustment, while also reducing the complexity of the operation of the screw device, and extending the service life of the screw device.

[0021] The working principle of the above embodiment is:

[0022] First, install the stand on the rail car, and then start the screw device. When the screw device runs, the screw drives the hinge block to adjust the angle, and at the same time, the outer tube can adjust the angle until the outer tube drives the sprayer to move to the appropriate position through the inner tube. While moving, the follower cylinder runs at the same time. When the outer tube is lifted up, the follower cylinder is pushed out accordingly, and when it is lifted down, the follower cylinder is retracted accordingly. Then the motor runs, and the motor drives the upper gear to drive the screw part to run through the engagement of the lower gear, so that the outer tube can be pushed out until the sprayer is driven close to the steel box girder. Then the angle is adjusted through the screw device, so that spraying can be done from top to bottom or from bottom to top. At the same time, the follower cylinder follows to reduce the load of the screw device, and then the telescopic assembly also runs accordingly, and the distance between it and the steel box girder can be adjusted according to the upper and lower spraying to ensure that the thickness of the spraying is equal.

[0023] In summary, the position of the stand is adjusted by the rail car, and the automated spraying is completed through angle adjustment and telescopic adjustment, thereby improving the efficiency and effect of spraying.

[0024] The entire workflow is completed, and the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0025] It should be noted that in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical arm for spraying paint on a steel box girder, characterized in that: The invention comprises a vertical frame (1), a recessed frame (3) is fixed on the inner side of the vertical frame (1), hinge frames (18) are hinged on opposite sides of the recessed frame (3), an outer tube (4) is fixed between the two hinge frames (18), an inner tube (10) is sleeved inside the outer tube (4), a sprayer (11) is installed at the head end of the inner tube (10), a telescopic component for driving the inner tube (10) to move is installed in the outer tube (4), a frame (12) is fixed on the outer side of the outer tube (4), a vertical frame (13) is rotatably connected to the frame (12), a screw device (15) is installed on the inner side of the vertical frame (13), and one end of the recessed frame (3) is hinged with a hinge block (14) fixed to a nut of the screw device (15).

2. A paint spraying robot arm for steel box beams according to claim 1, characterized in that: A crossbeam (2) is fixed between two frame rods in the vertical frame (1).

3. A paint spraying robot arm for steel box beams according to claim 2, characterized in that: One side of the crossbeam (2) is hinged with a follower cylinder (16) which is hinged with one side of the frame (12).

4. The mechanical arm for spraying paint on a steel box beam according to claim 1, characterized in that: The telescopic assembly comprises a screw rod portion (8) mounted on the inner side of an outer tube (4), a nut end of the screw rod portion (8) being fixed to the inner side of an inner tube (10), a shroud (5) and a motor (6) being fixed to the top of the tail end of the outer tube (4), an upper gear (7) being rotatably connected to a rotating shaft of the motor (6) being mounted on the shroud (5), and a lower gear (9) being meshed with the upper gear (7) being fixed to the outer side of the tail end of the screw rod portion (8).

5. The mechanical arm for spraying paint on a steel box beam according to claim 4, characterized in that: The outer tube (4) and the inner tube (10) are both square in shape, and anti-collision blocks (17) are fixed to the four inner walls of the tube opening of the outer tube (4) and the four outer walls of the tail opening of the inner tube (10).

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