Portable polishing equipment for square tube

Abstract

The invention discloses portable grinding equipment for a square tube. Comprising a top frame, a seat assembled on the top frame, at least four sets of supporting arms assembled on the top frame in a matrix state, an adjusting unit assembled on the top frame and located under the seat, a handheld grinding machine detachably assembled on the moving end of the adjusting unit through a mounting unit, and a handle assembled on the top frame. A steel wire grinding wheel is detachably assembled on a rotating shaft of the handheld grinding machine, a vertical supporting pulley is assembled at the bottom end of the supporting arm, a horizontal limiting pulley capable of being in sliding contact with the side wall of a square pipe is assembled on the lower portion of the supporting arm through an adjusting mechanism, and a user sits on the seat and drives the grinding equipment to slide on the ground through two legs. A user can finish polishing in a sitting posture mode, the polishing speed is high, the working intensity is low, the size of the polishing equipment is small, the polishing equipment can be conveniently carried among different construction sites, the polishing equipment can be pushed to slide on the ground for short-distance transfer, and labor is saved and convenience is achieved during transfer.

Description

Technical Field

[0001] This invention relates to the technical field of square tube processing, specifically to a portable square tube grinding device. Background Technology

[0002] Installing elevators in older residential communities is an important project that benefits people's livelihoods. It offers numerous advantages: it completely solves the difficulties faced by the elderly, children, pregnant women, people with mobility issues, and those carrying heavy objects upstairs, allowing them to easily descend stairs; it reduces safety risks such as falls and cardiovascular events caused by climbing stairs; it significantly reduces the physical burden of daily activities like purchasing heavy items and taking out the trash; a successful installation process can enhance neighborly communication and understanding, improving the community atmosphere; and as an important part of the renovation of older residential communities, it can improve the overall image and environment of the community.

[0003] To ensure safety during elevator installation, the square tubing used in the main steel structure should generally be no less than 200×200×8 mm. During actual installation, to improve the elevator's aesthetics and lifespan, the square tubing is sanded and painted to reduce oxidation. However, since bumps and knocks can occur during handling and transportation, the paint, even if pre-painted at the factory, will be damaged during installation. Furthermore, considering cost, purchasing pre-painted square tubing is more expensive than on-site workers sanding and painting it themselves. On-site workers need to use portable sanders, requiring them to bend over constantly, which is physically demanding. Therefore, a portable square tubing sanding device needs to be designed. Summary of the Invention

[0004] In view of the above-mentioned technical problems, the purpose of this invention is to overcome the problem that the existing technology requires workers to bend over for grinding, which results in high labor intensity and a heavy burden on the workers' bodies.

[0005] To achieve the above objectives, the present invention provides a portable square tube grinding device, comprising: a top frame, a seat mounted on the top frame, at least four sets of support arms mounted in a matrix on the top frame, an adjustment unit mounted on the top frame and located directly below the seat, a handheld grinder detachably mounted on the moving end of the adjustment unit via an installation unit, and a handle mounted on the top frame, wherein a steel wire grinding wheel is detachably mounted on the rotating shaft of the handheld grinder. The bottom end of the support arm is equipped with a vertical support pulley, and the lower part of the support arm is equipped with a horizontal limiting pulley that can slide in contact with the side wall of the square tube through an adjustment mechanism.

[0006] Preferably, the bottom of the top frame is equipped with a mounting bracket, the top of the support arm is mounted on the top frame via a hinge seat, and the mounting bracket is hinged with threaded rods corresponding to a plurality of support arms via a hinge shaft. Each threaded rod is detachably connected to the corresponding support arm, and the axis of the hinge shaft and the rotation axis of the hinge seat are both parallel to the axis of the support pulley.

[0007] Preferably, a limiting ring that can contact the side of the support arm near the mounting bracket is fixedly mounted on the threaded rod, and a first mounting nut that can press against the support arm is threadedly mounted on the end of the threaded rod. The support arm is hollow, and a mounting hole for the threaded rod to pass through is provided on the side of the support arm away from the limiting ring. A first strip hole for the threaded rod to pass through is provided on the side of the support arm that contacts the limiting ring.

[0008] Preferably, the adjustment mechanism includes a mounting base fixedly mounted on the support arm, a connecting frame connected to the limiting pulley, and a plurality of guide rods whose length direction is consistent with the axis direction of the support pulley and slides through the mounting base. The mounting base is equipped with at least one locking bolt whose end can abut against the corresponding guide rod.

[0009] Preferably, the mounting bracket includes a mounting arm whose length direction is consistent with the length direction of the supporting pulley axis, and a second strip-shaped hole of the same length is provided through the mounting arm; The adjustment unit includes a U-shaped component that is slidably sleeved on the mounting arm with the notch facing downward, at least one vertical strip plate that can be vertically moved and assembled on the U-shaped component, at least one first mounting bolt that passes through the top of the U-shaped component and the second strip hole, and a second mounting nut that is threadedly assembled on the lower end of the second mounting bolt. The mounting unit is fixedly connected to the lower end of the strip plate.

[0010] Preferably, a pair of vertical positioning rods that are inserted upward into the second slot are fixedly connected to the second mounting nut.

[0011] Preferably, at least one third strip-shaped hole of the same length direction is provided through the strip plate, and a second mounting bolt assembled on the side wall of the U-shaped part is inserted in the third strip-shaped hole. A third nut that can abut against the corresponding strip plate or U-shaped part is assembled on the end of the second mounting bolt.

[0012] Preferably, vertical reinforcing ribs are fixedly connected to the strip plate along the same length direction, and the sidewalls of the reinforcing ribs can contact the corresponding third nut.

[0013] Preferably, the mounting unit includes a horizontal mounting plate fixedly connected to the lower end of the strip plate, a rubber block assembled at the lower end of the mounting plate, and a clamping plate located below the rubber block and connected to the mounting plate by a plurality of third mounting bolts, wherein the lower surface of the rubber block is an arc-shaped surface.

[0014] According to the above technical solution, the portable square tube grinding device provided by the present invention has the following advantages compared with the prior art: Firstly, after adjusting the positions of the wire grinding wheel and the limiting pulley, the user sits on the seat, holds the handle, and bends his / her knees. He / She uses his / her legs to drive the grinding equipment to slide on the ground, thereby driving the wire grinding wheel to move along the length of the square tube. The user can complete the grinding in a seated position. Compared with traditional manual hand grinding, the grinding speed is faster and the workload is lower. Secondly, the grinding equipment is small in size, which makes it easy to move between different construction sites. When working in the same community, it can be pushed and slid on the ground for short-distance transfer, which is labor-saving and convenient. Third, when the user sits on the seat, the steel wire grinding wheel can contact the square tube with a certain pressure based on the user's own weight, thereby improving the grinding effect. Therefore, the contact pressure during grinding can be adjusted by adjusting the height of the handheld grinder. Fourth, existing handheld grinders can be directly assembled onto the installation unit for use, which is low-cost and conducive to market expansion. The handheld grinders can also be detached and used separately, making them highly flexible in use.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description section; and all parts not covered in the present invention are the same as or can be implemented using the prior art. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram illustrating the use of a portable square tube grinding device provided by the present invention; Figure 2 This is a three-dimensional structural diagram of a portable square tube grinding device provided by the present invention; Figure 3 This invention provides a portable square tube grinding device. Figure 2 Enlarged view of point A in the middle; Figure 4 This invention provides a portable square tube grinding device. Figure 2 Enlarged view of point B in the middle; Figure 5 This is a partial three-dimensional structural diagram of a portable square tube grinding device provided by the present invention; Figure 6 This invention provides a portable square tube grinding device. Figure 2 Enlarged view of point C in the middle; Figure 7 This is a partially exploded schematic diagram of the adjustment unit of a portable square tube grinding device provided by the present invention.

[0017] Explanation of reference numerals in the attached figures 1. Top frame; 2. Seat; 3. Support arm; 4. Handheld grinder; 5. Handle; 6. Wire grinding wheel; 7. Support pulley; 8. Limiting pulley; 9. Mounting bracket; 10. Threaded rod; 11. Limiting ring; 12. First mounting nut; 13. First slotted hole; 14. Mounting base; 15. Connecting bracket; 16. Guide rod; 17. Locking bolt; 18. Mounting arm; 19. Second slotted hole; 20. U-shaped piece; 21. Strip plate; 22. First mounting bolt; 23. Second mounting nut; 24. Positioning rod; 25. Third slotted hole; 26. Second mounting bolt; 27. Reinforcing rib; 28. Mounting plate; 29. ​​Rubber block; 30. Third mounting bolt; 31. Clamping plate. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "inner," and "outer" in the terminology represent the orientation of the term in its normal use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term.

[0020] like Figure 1-7 As shown, a portable square tube polishing device includes: a top frame 1, a seat 2 mounted on the top frame 1, at least four sets of support arms 3 mounted in a matrix on the top frame 1, an adjustment unit mounted on the top frame 1 and located directly below the seat 2, a handheld polisher 4 detachably mounted on the moving end of the adjustment unit via an installation unit, and a handle 5 mounted on the top frame 1. A steel wire polishing wheel 6 is detachably mounted on the rotating shaft of the handheld polisher 4. The bottom end of the support arm 3 is equipped with a vertical support pulley 7, and the lower part of the support arm 3 is equipped with a horizontal limiting pulley 8 that can slide in contact with the side wall of the square tube through an adjustment mechanism.

[0021] In the above technical solution, when in use, the position of the support pulley 7 is first adjusted according to the specifications of the square tube so that several support pulleys 7 can slide and contact the corresponding side wall of the square tube. Then, the position of the handheld grinder 4 is adjusted by the adjustment unit so that the wire grinding wheel 6 can contact the top of the square tube. The user sits on the seat 2, holds the handle 5, and at this time the knees are bent. The user drives the grinding equipment to slide on the ground by using both legs, thereby driving the wire grinding wheel 6 to move along the length of the square tube. The user can complete the grinding in a seated position. Compared with the traditional manual hand grinding, the grinding speed is faster and the labor intensity is lower. When an average person is sitting, their hip height is about 50cm. Therefore, the optimal height for seat 2 is about 50cm. The small size of the grinding equipment also makes it easy to move between different construction sites. When working in the same community, it can be pushed and slid on the ground for short-distance transfer, which is labor-saving and convenient. The user sits on the seat 2, and the steel wire grinding wheel 6 can contact the square tube with a certain pressure based on the user's own weight, thereby improving the grinding effect. Therefore, the contact pressure during grinding can be adjusted by adjusting the height of the handheld grinder 4. The existing handheld grinder 4 can be directly assembled onto the installation unit for use, which is low-cost and conducive to market expansion. The handheld grinder 4 can also be detached and used independently, making it highly flexible in use.

[0022] In a preferred embodiment of the invention, the bottom of the top frame 1 is equipped with a mounting bracket 9, and the top of the support arm 3 is mounted on the top frame 1 via a hinge seat. The mounting bracket 9 is hinged with threaded rods 10 corresponding to a plurality of support arms 3 one by one via a hinge shaft. Each threaded rod 10 is detachably connected to the corresponding support arm 3. The axis of the hinge shaft and the rotation axis of the hinge seat are both parallel to the axis of the support pulley 7.

[0023] In the above technical solution, when transferring between different construction sites, the threaded rod 10 can be separated from the corresponding support arm 3. At this time, the support arm 3 can rotate around the hinge seat, and several support pulleys 7 can be brought together to further reduce the overall volume. Several support arms 3 can be tied together with ropes, which is beneficial for transportation.

[0024] In a preferred embodiment of the invention, a limiting ring 11 that can contact the side of the support arm 3 near the mounting bracket 9 is fixedly mounted on the threaded rod 10, and a first mounting nut 12 that can press against the support arm 3 is threadedly mounted on the end of the threaded rod 10. The support arm 3 is hollow. The side of the support arm 3 away from the limiting ring 11 is provided with an installation hole for the threaded rod 10 to pass through. The side of the support arm 3 in contact with the limiting ring 11 is provided with a first strip hole 13 for the threaded rod 10 to pass through.

[0025] In the above technical solution, when the threaded rod 10 needs to be connected to the support arm 3, the end of the threaded rod 10 is passed through the first strip hole 13 and the mounting hole, and then the first mounting nut 12 is tightened and assembled on the threaded rod 10 to fix the support arm 3; by loosening the first mounting nut 12 and removing the threaded rod 10 from the mounting hole and the first strip hole 13, the threaded rod 10 and the support arm 3 can be separated, which is simple and convenient to operate.

[0026] In a preferred embodiment of the invention, the adjustment mechanism includes a mounting base 14 fixedly mounted on the support arm 3, a connecting frame 15 connected to the limiting pulley 8, and a plurality of guide rods 16 whose length direction is consistent with the axis direction of the support pulley 7 and slides through the mounting base 14. The mounting base 14 is equipped with at least one locking bolt 17 whose end can abut against the corresponding guide rod 16.

[0027] In the above technical solution, the locking bolt 17 is loosened, and the guide rod 16 can slide on the mounting base 14. The distance between the limit pulley 8 and the support arm 3 can be adjusted according to the specifications of the square tube. When the adjustment is completed, the locking bolt 17 is tightened. It is highly practical and the adjustment is simple and convenient.

[0028] In a preferred embodiment of the invention, the mounting bracket 9 includes a mounting arm 18 whose length direction is consistent with the length direction of the axis of the supporting pulley 7, and a second strip hole 19 of the same length is provided through the mounting arm 18. The adjustment unit includes a U-shaped part 20 that is slidably sleeved on the mounting arm 18 with the notch facing downward, at least one vertical strip plate 21 that can be vertically moved and assembled on the U-shaped part 20, at least one first mounting bolt 22 that passes through the top of the U-shaped part 20 and the second strip hole 19, and a second mounting nut 23 that is threadedly assembled on the lower end of the second mounting bolt 22. The mounting unit is fixedly connected to the lower end of the strip plate 21.

[0029] In the above technical solution, by loosening the first mounting bolt 22, the U-shaped part 20 can slide on the mounting arm 18, thereby adjusting the contact position between the wire grinding wheel 6 and the square tube. For example, if several wire grinding wheels 6 cannot complete the grinding of one side of the square tube in one go, that is, when the width of the square tube is greater than the diameter of the wire grinding wheel 6, the position of the wire grinding wheel 6 can be adjusted to contact the edge of the top of the square tube. During one round of grinding, the direction of the grinding equipment can be turned. After turning the direction, the other part of the top of the square tube can be ground, thereby completing the grinding of the top of the square tube.

[0030] In a preferred embodiment of the invention, a pair of vertical positioning rods 24 are fixedly connected to the second mounting nut 23 and inserted upward into the second strip hole 19.

[0031] In the above technical solution, when adjusting the position of the U-shaped part 20, the first mounting bolt 22 is loosened, and its positioning rod 24 will still be stuck in the second strip hole 19. When the first mounting bolt 22 is tightened, its second mounting nut 23 will not rotate, so as to tighten the first mounting bolt 22 without the need to use extra tools to hold the second mounting nut 23.

[0032] In a preferred embodiment of the invention, at least one third strip hole 25 of the same length direction is provided through the strip plate 21. A second mounting bolt 26, which is assembled on the side wall of the U-shaped member 20, is inserted into the third strip hole 25. A third nut that can abut against the corresponding strip plate 21 or U-shaped member 20 is assembled on the end of the second mounting bolt 26.

[0033] In the above technical solution, loosening the second mounting bolt 26 can adjust the height of the strip plate 21, drive the hand-held grinder 4 to adjust the height, the side wall of the third strip hole 25 slides against the third mounting bolt 30, and then tightening the second mounting bolt 26 to fix the strip plate 21.

[0034] In a preferred embodiment of the invention, vertical reinforcing ribs 27 are fixedly connected to the strip plate 21 along the same length direction, and the sidewalls of the reinforcing ribs 27 can contact the corresponding third nut.

[0035] In the above technical solution, the reinforcing rib 27 can not only improve the strength of the strip plate 21, but also lock the third nut so that the third nut cannot rotate when it comes into contact with the reinforcing rib 27, so as to loosen and tighten the second mounting bolt 26.

[0036] In a preferred embodiment of the invention, the mounting unit includes a horizontal mounting plate 28 fixedly connected to the lower end of the strip plate 21, a rubber block 29 assembled at the lower end of the mounting plate 28, and a clamping plate 31 located below the rubber block 29 and connected to the mounting plate 28 by a plurality of third mounting bolts 30. The lower surface of the rubber block 29 is an arc-shaped surface.

[0037] In the above technical solution, the rubber block 29 can be made of nitrile rubber, which has a certain hardness and can fit the handheld grinder 4, making it easy to fix the handheld grinder 4. The clamp 31 can be quickly disassembled and installed through the third mounting bolt 30, so as to quickly install and disassemble the handheld grinder 4. The operation is simple and convenient.

[0038] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0039] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0040] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A portable square tube grinding device, characterized in that, include: The top frame (1), the seat (2) mounted on the top frame (1), at least four sets of support arms (3) mounted in a matrix on the top frame (1), an adjustment unit mounted on the top frame (1) and located directly below the seat (2), a hand-held grinder (4) detachably mounted on the moving end of the adjustment unit via an installation unit, and a handle (5) mounted on the top frame (1), wherein a wire grinding wheel (6) is detachably mounted on the rotating shaft of the hand-held grinder (4); The bottom end of the support arm (3) is equipped with a vertical support pulley (7), and the lower part of the support arm (3) is equipped with a horizontal limiting pulley (8) that can slide in contact with the side wall of the square tube through an adjustment mechanism.

2. The portable square tube grinding device according to claim 1, characterized in that, The bottom of the top frame (1) is equipped with a mounting bracket (9), and the top of the support arm (3) is mounted on the top frame (1) through a hinge seat. The mounting bracket (9) is hinged with a threaded rod (10) corresponding to a number of support arms (3) one by one. Each threaded rod (10) is detachably connected to the corresponding support arm (3). The axis of the hinge shaft and the rotation axis of the hinge seat are parallel to the axis of the support pulley (7).

3. The portable square tube grinding device according to claim 2, characterized in that, A limiting ring (11) that can contact the side of the support arm (3) near the mounting bracket (9) is fixedly mounted on the threaded rod (10), and a first mounting nut (12) that can press against the support arm (3) is threadedly mounted on the end of the threaded rod (10). The support arm (3) is hollow. The side of the support arm (3) away from the limiting ring (11) is provided with an installation hole for the threaded rod (10) to pass through. The side of the support arm (3) in contact with the limiting ring (11) is provided with a first strip hole (13) for the threaded rod (10) to pass through.

4. The portable square tube grinding device according to claim 1, characterized in that, The adjustment mechanism includes a mounting base (14) fixedly mounted on the support arm (3), a connecting frame (15) connected to the limiting pulley (8), and a number of guide rods (16) whose length direction is consistent with the axis direction of the support pulley (7) and slide through the mounting base (14). The mounting base (14) is equipped with at least one locking bolt (17) whose end can abut against the corresponding guide rod (16).

5. A portable square tube grinding device according to claim 2, characterized in that, The mounting bracket (9) includes a mounting arm (18) whose length direction is consistent with the length direction of the axis of the support pulley (7), and a second strip hole (19) of the same length is provided through the mounting arm (18). The adjustment unit includes a U-shaped part (20) that is slidably sleeved on the mounting arm (18) and has a notch facing downward, at least one vertical strip plate (21) that can be vertically moved and mounted on the U-shaped part (20), at least one first mounting bolt (22) that passes through the top of the U-shaped part (20) and the second strip hole (19), and a second mounting nut (23) that is threadedly mounted on the lower end of the second mounting bolt (22). The mounting unit is fixedly connected to the lower end of the strip plate (21).

6. The portable square tube grinding device according to claim 5, characterized in that, A pair of vertical positioning rods (24) are fixedly connected to the second mounting nut (23) and inserted upward into the second strip hole (19).

7. A portable square tube grinding device according to claim 5, characterized in that, At least one third strip hole (25) with the same length direction is provided through the strip plate (21). A second mounting bolt (26) assembled on the side wall of the U-shaped part (20) is inserted in the third strip hole (25). A third nut that can abut against the corresponding strip plate (21) or U-shaped part (20) is assembled on the end of the second mounting bolt (26).

8. A portable square tube grinding device according to claim 7, characterized in that, Vertical reinforcing ribs (27) are fixedly connected to the strip plate (21) along the same length direction, and the sidewalls of the reinforcing ribs (27) can contact the corresponding third nut.

9. A portable square tube grinding device according to claim 5, characterized in that, The installation unit includes a horizontal mounting plate (28) fixedly connected to the lower end of the strip plate (21), a rubber block (29) assembled at the lower end of the mounting plate (28), and a clamping plate (31) located below the rubber block (29) and connected to the mounting plate (28) by a number of third mounting bolts (30). The lower surface of the rubber block (29) is an arc-shaped surface.

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