Device for transversely scribing on inner wall of square steel pipe

Abstract

The utility model discloses a device for transversely scribing on the inner wall of a square steel pipe, and belongs to the technical field of steel pipe machining auxiliary equipment. The device for transversely scribing the inner wall of the square steel pipe comprises eight first supports, four second supports, a third support, two fourth supports, four fifth supports, eight sixth supports, eight seventh supports, an eighth support, two linear bearings, eight refills, sixteen first screws and eight second screws. The transverse scribing device for the inner wall of the square steel pipe can achieve the purpose of transversely scribing the inner wall of the square steel pipe, and has the advantages of being low in manufacturing cost, easy to operate and good in using effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary equipment for steel pipe processing, and particularly relates to a device for transversely scribing on the inner wall of a square steel pipe. Background Art

[0002] At present, compared with profiles of other cross-sections, steel pipes have relatively high resistance to bending and torsion; compared with circular steel pipes, square steel pipes have a relatively large stress area and stable structural performance. Therefore, square steel pipes are widely used in the fields of mechanical manufacturing and structural engineering. In many cases, it is necessary to transversely scribe on the inner wall of a square steel pipe as a reference mark for processing grooves on the inner wall, calibrating the installation position, or measuring the internal dimensions. However, relatively few professional devices for transversely scribing on the inner wall of square steel pipes have been developed. Usually, enterprises use a right-angle caliper to transversely scribe on the inner wall of square steel pipes, but the scribing accuracy and scribing efficiency of this method are relatively limited.

[0003] After retrieval, it is found that there are three patent literatures most relevant to the technology of the utility model, and the specific contents are described as follows:

[0004] Patent document CN 202020692698.9 discloses a scribing device for steel pipe cutting, which mainly includes a scribing ring, a column, a connecting plate, a screw rod, a positioning block, a bottom plate, a lifting plate, a tapered block, a slider, a scribing box, a connecting rod, a placement frame, a limiting block, a bearing, a moving block, a fixed block, a roller, a spring, a telescopic rod, a pushing block, a rotating shaft and a rotating handle. The adjustable scribing function realizes the scribing operation by one person. The mechanical scribing can not only improve the scribing accuracy but also improve the scribing efficiency. However, this device is only applicable to scribing on the outer wall of steel pipes and is not applicable to scribing on the inner wall of steel pipes.

[0005] Patent document CN 202022153824.6 discloses a longitudinal median line scribing device for steel pipes, which mainly includes a fixed frame, a slider, an adjusting lead screw, a bushing, a rotating arm, a scribing pen, a guide rod, a rotating roller and a fixed pile. The adjusting lead screw can not only adjust the distance between the rotating rollers to adapt to steel pipes of different diameters but also lock the position of the slider. The two rotating arms can always form an isosceles triangle, and thus can scribe the longitudinal median line of the steel pipe, which can not only improve the scribing accuracy but also improve the scribing efficiency. However, this device is only applicable to scribing on the outer wall of steel pipes and is not applicable to scribing on the inner wall of steel pipes.

[0006] Patent document CN202322620015.5 discloses a scribing device for assisting in steel pipe processing, which mainly includes a mounting chassis, a mounting frame, a support plate, a supporting roller, a rotating cylinder, a screw rod, a mounting sleeve, a spring, a scribing pen, a positioning platform and an auxiliary handle. The screw rod can adjust the height of the scribing pen in the rotating cylinder to adapt to steel pipes of different diameters. The mounting sleeve can finely adjust the position of the scribing pen. Rotating the rotating cylinder can synchronously drive the scribing pen to rotate around the steel pipe for one week to complete scribing, and the scribing quality is relatively good. However, this device is only applicable to scribing on the outer wall of the steel pipe and not to scribing on the inner wall of the steel pipe. Summary of the Utility Model

[0007] In order to overcome one or more of the problems existing in the prior art, the present utility model provides a device for scribing horizontally on the inner wall of a square steel pipe. The present utility model is designed based on a symmetrical structure. The use of the eighth bracket can achieve the relative setting of the two fourth brackets; the combined use of the fourth bracket and the rolling bearing can achieve the positioning and swinging of the second bracket; the combined use of the second bracket and the eighth bracket can achieve the rolling of the wheels along a predetermined trajectory; the combined use of the fifth bracket and the first screw can achieve the relative setting of the eight sixth brackets; the combined use of the sixth bracket and the rolling bearing can achieve the positioning and swinging of the first bracket; the use of the third bracket can achieve the up and down movement of the linear bearing along a predetermined trajectory; the use of the second screw can achieve the linkage of the fourth bracket, the eighth bracket and the linear bearing; the use of the magnet can achieve the stable standing of the four fifth brackets outside the front, rear, left and right end faces of the eighth bracket without falling; the combined use of the first bracket and the seventh bracket can achieve the positioning of the pen core; the use of the spring can achieve the horizontal scribing of the pen core above the front, rear, left and right end faces of the inner wall of the square steel pipe. Therefore, the use effect of the device of the present utility model is relatively good.

[0008] The technical solution adopted by the present utility model to solve its technical problems is described as follows.

[0009] The device for scribing horizontally on the inner wall of a square steel pipe provided by the present utility model includes eight first brackets, four second brackets, one third bracket, two fourth brackets, four fifth brackets, eight sixth brackets, eight seventh brackets, one eighth bracket, two linear bearings, eight pen cores, sixteen first screws, eight second screws, twenty-four rolling bearings, eight springs, sixteen wheels, sixteen hinges and eight magnets;

[0010] The first bracket is composed of a first body, a first boss and two first bearing sections connected together. The first body is a symmetric cuboid structure. The first boss is located at the rear end face of the first body. The two first bearing sections are arranged oppositely and are respectively located at the upper and lower end faces of the first body. The first boss is a symmetric cylinder structure. A cylindrical first through hole is provided at the axis position of the first boss, and the refill is inserted through the first through hole. External threads are provided at the end of the first boss for screwing with the internal threads of the seventh bracket. A cylindrical first groove is provided at the central position of the rear end face of the first body, and the spring and the refill are inserted through the first groove. The first groove and the first through hole are coaxially connected. The first bearing section is a symmetric cylinder structure for inserting the rolling bearing.

[0011] The second bracket is composed of two second bodies, a second boss and two second bearing sections connected together. The two second bodies are arranged oppositely. The second boss is a symmetric cuboid structure and is located between the two second bodies. The two second bearing sections are arranged oppositely and are respectively located at the upper and lower end faces of the two second bodies. The horizontal cross-section of the second body is a symmetric isosceles trapezoid structure, and the base angle of the isosceles trapezoid is 45 degrees. A first through groove in the shape of a cuboid is provided at the rear end face of the second body for guiding the wheel. The second bearing section is a symmetric cylinder structure for inserting the rolling bearing.

[0012] The third bracket is composed of a third body, four third bosses and eight fourth bosses connected together. The third body is a symmetric cuboid structure. The four third bosses are arranged in pairs oppositely and are simultaneously located on the upper end face of the third body. The eight fourth bosses are divided into four groups and are simultaneously located on the upper end face of the third body. The third boss is a symmetric cylinder structure for inserting the third through hole of the linear bearing. The fourth boss is a symmetric cylinder structure for internally positioning the square steel pipe.

[0013] The fourth bracket is composed of a fifth body and four sixth bosses connected together. The fifth body is a symmetric cuboid structure. The four sixth bosses are arranged in pairs opposite to each other and are located on the upper end face of the fifth body at the same time. A cuboid-shaped fourth through hole is provided in the middle part of the fifth body, and four fifth bosses of the linear bearing are inserted into the fourth through hole. Four cylindrical fifth through holes are evenly provided around the fourth through hole, and second screws are inserted into the fifth through holes. The sixth boss is a symmetric cylindrical structure. A cylindrical second groove is provided at the axis position of the upper end face of the sixth boss, and a rolling bearing is inserted into the second groove. A cylindrical sixth through hole is provided at the axis position of the second groove, and the second bearing section of the second bracket is inserted into the sixth through hole. The sixth through hole also penetrates the fifth body.

[0014] The fifth bracket is composed of a sixth body, two seventh bosses and eight eighth bosses connected together. The sixth body, the seventh boss and the eighth boss are all symmetric cuboid structures. The two seventh bosses are arranged opposite to each other and are located on the front end face of the sixth body at the same time. The eight eighth bosses are divided into four groups and are located on the rear end face of the sixth body at the same time. Two first screw holes are symmetrically provided in the seventh boss, and first screws are screwed into the first screw holes. A cuboid-shaped second through groove can be formed between the two eighth bosses in each group, and a wheel is inserted into the second through groove. A cylindrical seventh through hole is provided in the eighth boss, and a hinge is inserted into the seventh through hole.

[0015] The sixth bracket is composed of two seventh bodies and a ninth boss connected together. The seventh body and the ninth boss are both symmetric cuboid structures. The two seventh bodies are arranged opposite to each other, and the ninth boss is located between the two seventh bodies. A cylindrical third groove is provided at the middle position of the upper end face of the seventh body, and a rolling bearing is inserted into the third groove. A cylindrical eighth through hole is provided at the axis position of the third groove, and the first bearing section of the first bracket is inserted into the eighth through hole. Two cylindrical ninth through holes are symmetrically provided in the ninth boss, and first screws are inserted into the ninth through holes.

[0016] The seventh bracket is composed of an eighth body and a tenth boss connected coaxially. Both the eighth body and the tenth boss are symmetric structures in the shape of a cylinder. The tenth boss is located at the rear end face of the eighth body. A cylindrical fourth groove is provided at the axis position of the front end face of the eighth body, and the refill is inserted through the fourth groove. An internal thread is provided at the end of the eighth body for screwing with the external thread of the first bracket. A cylindrical tenth through hole is provided at the axis position of the tenth boss, and the refill is inserted through the tenth through hole. The tenth through hole and the fourth groove are coaxially connected.

[0017] The eighth bracket is composed of a ninth body, four eleventh bosses and four twelfth bosses connected. Both the ninth body and the eleventh bosses are symmetric structures in the shape of a cuboid. The four eleventh bosses are respectively located at the front, rear, left and right end faces of the ninth body, and the four twelfth bosses are respectively located at the front, rear, left and right end faces of the four eleventh bosses. A cuboid-shaped eleventh through hole is provided at the middle position of the ninth body, and the four fifth bosses of the linear bearing are inserted through the eleventh through hole. Four second screw holes are evenly provided around the eleventh through hole, and the second screws are screwed into the second screw holes. The horizontal cross-section of the twelfth boss is a symmetric structure in the shape of an isosceles trapezoid, the base angle of the isosceles trapezoid is 45 degrees, and two cuboid-shaped third through grooves are symmetrically provided on the end face of the twelfth boss for guiding the wheel.

[0018] In some embodiments, the linear bearing is composed of a fourth body and four fifth bosses connected. The fourth body is a symmetric structure in the shape of a cuboid, and the four fifth bosses are arranged in pairs and located on the upper end face of the fourth body at the same time. Four cylindrical second through holes are symmetrically provided on the fourth body, and the second screws are inserted through the second through holes. The fifth boss is a symmetric structure in the shape of a cylinder. A cylindrical third through hole is provided at the axis position of the fifth boss, and the third boss of the third bracket is inserted through the third through hole. The third through hole also penetrates the fourth body. A cage, balls and a retaining ring are also provided inside the fifth boss.

[0019] In some embodiments, the refill, the first screw, the second screw, the rolling bearing, the spring, the wheel, the hinge and the magnet are all standard parts.

[0020] The beneficial effects of the present utility model are as follows:

[0021] 1) The device for transverse scribing on the inner wall of a square steel pipe provided by the present utility model includes eight first brackets, four second brackets, one third bracket, two fourth brackets, four fifth brackets, eight sixth brackets, eight seventh brackets, one eighth bracket, two linear bearings, eight pen refills, sixteen first screws, eight second screws, twenty-four rolling bearings, eight springs, sixteen wheels, sixteen hinges, and eight magnets. Since the materials are common and easy to process into shapes, the manufacturing cost of the device of the present utility model is relatively low.

[0022] 2) When the present utility model is in use, pass the square steel pipe through the sixth brackets and place it on the third body of the third bracket. Move the fourth bracket along the third boss to the position on the square steel pipe where scribing is required; simultaneously swing ①, ②, ⑤, and ⑥ forward by 90 degrees. Along the first through groove of the second bracket and the third through grooves on the front and rear sides of the eighth bracket, move the fifth bracket carts on the front and rear sides left and right, and the pen refills on the front and rear sides can scribe transversely on the inner wall of the square steel pipe; simultaneously swing ①, ②, ⑤, and ⑥ backward by 90 degrees, move the fifth bracket carts on the front and rear sides, and place the wheels in the third through grooves on the front and rear sides of the eighth bracket. Simultaneously swing A, B, C, and D forward by 90 degrees; simultaneously swing ③, ④, ⑦, and ⑧ forward by 90 degrees. Along the first through groove of the second bracket and the third through grooves on the left and right sides of the eighth bracket, move the fifth bracket carts on the left and right sides forward and backward, and the pen refills on the left and right sides can scribe transversely on the inner wall of the square steel pipe. Therefore, the operation of the device of the present utility model is relatively simple.

[0023] 3) The present utility model is designed based on a symmetric structure. The use of the eighth bracket can realize the relative setting of the two fourth brackets; the combined use of the fourth bracket and the rolling bearing can realize the positioning swing of the second bracket. The combined use of the second bracket and the eighth bracket can realize the rolling of the wheels along a predetermined trajectory; the combined use of the fifth bracket and the first screw can realize the relative setting of the eight sixth brackets. The combined use of the sixth bracket and the rolling bearing can realize the positioning swing of the first bracket; the use of the third bracket can realize the up and down movement of the linear bearing along a predetermined trajectory. The use of the second screw can realize the linkage of the fourth bracket, the eighth bracket, and the linear bearing; the use of the magnet can realize that the four fifth brackets stand steadily outside the front, rear, left, and right four end faces of the eighth bracket without falling. The combined use of the first bracket and the seventh bracket can realize the positioning of the pen refill. The use of the spring can realize the transverse scribing of the pen refill on the front, rear, left, and right four end faces on the inner wall of the square steel pipe. Therefore, the use effect of the device of the present utility model is relatively good.

[0024] The device provided by the present utility model for performing horizontal scribing on the inner wall of a square steel pipe can achieve the purpose of performing horizontal scribing on the inner wall of the square steel pipe. The device of the present utility model has the characteristics of low manufacturing cost, simple operation, and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 FIG. 6 is a front view structural schematic diagram of the device for performing horizontal scribing on the inner wall of a square steel pipe of the present utility model when the square steel pipe is not inserted;

[0026] Figure 2 FIG. 10 is a partial top view structural schematic diagram of the device for performing horizontal scribing on the inner wall of a square steel pipe of the present utility model when the square steel pipe is not inserted;

[0027] Figure 3 FIG. 14 is a top view structural schematic diagram of the device for performing horizontal scribing on the inner wall of a square steel pipe of the present utility model when scribing on the front and rear end faces of the inner wall of the square steel pipe;

[0028] Figure 4 FIG. 18 is a top view structural schematic diagram of the device for performing horizontal scribing on the inner wall of a square steel pipe of the present utility model when scribing on the left and right end faces of the inner wall of the square steel pipe;

[0029] Figure 5 FIG. 22 is a top view structural schematic diagram of the mutual positional relationship among the seventh bracket, the refill, the spring, and the first bracket of the present utility model;

[0030] Figure 6 FIG. 26 is a front view structural schematic diagram of the first bracket of the present utility model;

[0031] Figure 7 FIG. 30 is a bottom view structural schematic diagram of the first bracket of the present utility model;

[0032] Figure 8 FIG. 34 is a sectional view structural schematic diagram of the first bracket along the M-M plane of the present utility model;

[0033] Figure 9 FIG. 38 is a front view structural schematic diagram of the second bracket of the present utility model;

[0034] Figure 10 FIG. 42 is a left view structural schematic diagram of the second bracket of the present utility model;

[0035] Figure 11 FIG. 46 is a bottom view structural schematic diagram of the second bracket of the present utility model;

[0036] Figure 12 FIG. 50 is a front view structural schematic diagram of the third bracket of the present utility model;

[0037] Figure 13The top view structural schematic diagram of the third bracket of the present utility model;

[0038] Figure 14 The front view structural schematic diagram of the linear bearing of the present utility model;

[0039] Figure 15 The top view structural schematic diagram of the linear bearing of the present utility model;

[0040] Figure 16 The front view structural schematic diagram of the fourth bracket of the present utility model;

[0041] Figure 17 The top view structural schematic diagram after the fourth bracket of the present utility model and a rolling bearing are assembled;

[0042] Figure 18 The left view structural schematic diagram after the fifth bracket of the present utility model and a wheel are assembled;

[0043] Figure 19 The top view structural schematic diagram after the fifth bracket of the present utility model and a wheel are assembled;

[0044] Figure 20 The front view structural schematic diagram of the sixth bracket of the present utility model;

[0045] Figure 21 The top view structural schematic diagram after the sixth bracket of the present utility model and a rolling bearing are assembled;

[0046] Figure 22 The front view structural schematic diagram of the seventh bracket of the present utility model;

[0047] Figure 23 The rear view structural schematic diagram of the seventh bracket of the present utility model;

[0048] Figure 24 The bottom view structural schematic diagram of the seventh bracket of the present utility model;

[0049] Figure 25 The sectional view structural schematic diagram of the seventh bracket of the present utility model along the N-N plane;

[0050] Figure 26 The front view structural schematic diagram after the eighth bracket of the present utility model and two magnets are assembled;

[0051] Figure 27 The top view structural schematic diagram after the eighth bracket of the present utility model and one magnet are assembled;

[0052] Figure 28 The schematic diagram of the forward swing of the first bracket of the present utility model;

[0053] Figure 29Schematic diagram of the reverse swing of the first bracket of the present utility model;

[0054] Figure 30 Schematic diagram of the forward swing of the second bracket of the present utility model;

[0055] Figure 31 Schematic diagram of the reverse swing of the second bracket of the present utility model.

[0056] Explanation of reference numerals in the drawings: 1 - first bracket; 101 - first body; 102 - first boss; 103 - first bearing section; 104 - first groove; 105 - first through hole; 2 - second bracket; 201 - second body; 202 - second boss; 203 - second bearing section; 204 - first through slot; 3 - third bracket; 301 - third body; 302 - third boss; 303 - fourth boss; 4 - linear bearing; 401 - fourth body; 402 - fifth boss; 403 - second through hole; 404 - third through hole; 5 - fourth bracket; 501 - fifth body; 502 - sixth boss; 503 - fourth through hole; 504 - fifth through hole; 505 - second groove; 506 - sixth through hole; 6 - fifth bracket; 601 - sixth body; 602 - seventh boss; 603 - eighth boss; 604 - first screw hole; 605 - second through slot; 606 - seventh through hole; 7 - sixth bracket; 701 - seventh body; 702 - ninth boss; 703 - third groove; 704 - eighth through hole; 705 - ninth through hole; 8 - seventh bracket; 801 - eighth body; 802 - tenth boss; 803 - fourth groove; 804 - tenth through hole; 9 - eighth bracket; 901 - ninth body; 902 - eleventh boss; 903 - twelfth boss; 904 - eleventh through hole; 905 - second screw hole; 906 - third through slot; 10 - refill; 11 - first screw; 12 - second screw; 13 - rolling bearing; 14 - spring; 15 - wheel; 16 - hinge; 17 - magnet; 18 - square steel pipe. Detailed description of the specific implementation

[0057] The content of the present utility model is described in detail below through embodiments and drawings. The embodiments are only used to understand the present utility model and do not limit the content of the present utility model.

[0058] Combined with Figures 1 to 5As shown in the figure, the present utility model provides a device for making horizontal markings on the inner wall of a square steel pipe, which includes eight first brackets 1, four second brackets 2, one third bracket 3, two fourth brackets 5, four fifth brackets 6, eight sixth brackets 7, eight seventh brackets 8, one eighth bracket 9, two linear bearings 4, eight pen refills 10, sixteen first screws 11, eight second screws 12, twenty-four rolling bearings 13, eight springs 14, sixteen wheels 15, sixteen hinges 16 and eight magnets 17; wherein, a ninth body 901 of the eighth bracket 9 is disposed between two fifth bodies 501 of two relatively arranged fourth brackets 5, and eight fifth bosses 402 of two relatively arranged linear bearings 4 are disposed within two fourth through holes 503 of the two fourth brackets 5 and an eleventh through hole 904 of the eighth bracket 9, and are connected by eight second screws 12; eight rolling bearings 13 are disposed within eight second grooves 505 of the two fourth brackets 5, and eight second bearing segments 203 of four second brackets 2 that are pairwise relatively arranged are disposed within the eight rolling bearings 13; sixteen wheels 15 roll within eight third through grooves 906 of the eighth bracket 9, and the sixteen wheels 15 are disposed within sixteen second through grooves 605 of the four fifth brackets 6 and are hinged by sixteen hinges 16; eight ninth bosses 702 of eight sixth brackets 7 that are pairwise relatively arranged are disposed outside upper and lower end faces of eight seventh bosses 602 of the four fifth brackets 6, and are connected by sixteen first screws 11; sixteen rolling bearings 13 are disposed within sixteen third grooves 703 of the eight sixth brackets 7, and sixteen first bearing segments 103 of eight first brackets 1 that are pairwise relatively arranged are disposed within the sixteen rolling bearings 13; a part of eight springs 14 and eight pen refills 10 are disposed within eight first grooves 104 and eight first through holes 105 of the eight first brackets 1, another part of the eight pen refills 10 is disposed within eight fourth grooves 803 and eight tenth through holes 804 of the eight seventh brackets 8, and the eight seventh brackets 8 and the eight first brackets 1 are connected by internal and external threads; eight magnets 17 that are pairwise relatively arranged are disposed outside upper and lower end faces of four eleventh bosses 902 of the eighth bracket 9, and four third bosses 302 of a third bracket 3 are disposed within eight third through holes 404 of the two linear bearings 4.

[0059] The assembly process of the device for making horizontal markings on the inner wall of a square steel pipe provided by the present utility model.

[0060] Combined with Figures 1 to 27As shown, first, install eight of the rolling bearings 13 within the eight second grooves 505 of the two fourth brackets 5. Then, arrange the two fourth brackets 5 opposite to each other. Next, pass one eighth bracket 9 through between the two fifth bodies 501 of the two fourth brackets 5. Then, pass the eight second bearing segments 203 of the four second brackets 2 through the eight rolling bearings 13. In this way, the two fourth brackets 5, the eight rolling bearings 13, and the four second brackets 2 can be assembled;

[0061] Then, align the eleventh through-hole 904 of the eighth bracket 9 with the two fourth through-holes 503 of the two fourth brackets 5. Then, arrange the two linear bearings 4 opposite to each other, and pass the eight fifth bosses 402 through the aligned set of through-holes. Then, pass eight of the second screws 12 successively through the eight second through-holes 403 of the two linear bearings 4, the eight fifth through-holes 504 of the two fourth brackets 5, and screw them into the four second screw holes 905 of the eighth bracket 9. In this way, the two linear bearings 4, the two fourth brackets 5, and one eighth bracket 9 can be assembled;

[0062] Then, pass sixteen of the wheels 15 through the sixteen second through-grooves 605 of the four fifth brackets 6, and align the sixteen axle holes of the sixteen wheels 15 with the thirty-two seventh through-holes 606 of the four fifth brackets 6. Then, install sixteen of the hinges 16 within the sixteen sets of aligned through-holes. In this way, the four fifth brackets 6 and the sixteen wheels 15 can be assembled into four fifth-bracket carts;

[0063] Then, install sixteen of the rolling bearings 13 within the sixteen third grooves 703 of the eight sixth brackets 7. Then, arrange the eight sixth brackets 7 in pairs opposite to each other. Next, pass the sixteen first bearing segments 103 of the eight first brackets 1 through the sixteen rolling bearings 13. In this way, the eight sixth brackets 7, the sixteen rolling bearings 13, and the eight first brackets 1 can be assembled;

[0064] Then, sleeved the eight ninth bosses 702 of the eight sixth brackets 7 over the upper and lower eight end faces of the eight seventh bosses 602 of the four fifth brackets 6, and align the sixteen ninth through-holes 705 of the eight sixth brackets 7 with the sixteen first screw holes 604 of the four fifth brackets 6. Then, pass sixteen of the first screws 11 through the sixteen ninth through-holes 705 and screw them into the sixteen first screw holes 604. In this way, the eight sixth brackets 7 and the four fifth brackets 6 can be assembled;

[0065] Then, eight of the springs 14 and a part of eight of the refills 10 are successively inserted into the eight first grooves 104 and eight first through-holes 105 of the eight first brackets 1. Then, the other parts of the eight refills 10 are inserted into the eight fourth grooves 803 and eight tenth through-holes 804 of the eight seventh brackets 8. Then, the eight seventh brackets 8 and the eight first brackets 1 are screwed together through internal and external threads. In this way, the eight first brackets 1, the eight springs 14, the eight refills 10, and the eight seventh brackets 8 can be assembled;

[0066] Then, eight of the magnets 17 are arranged in pairs opposite to each other outside the upper and lower eight end faces of the four eleventh bosses 902 of the eighth bracket 9. Then, the sixteen wheels 15 are respectively arranged in the eight third through-grooves 906 of the eighth bracket 9. Then, a third bracket 3 is arranged on the mounting table. Finally, the four third bosses 302 of the third bracket 3 are inserted into the eight third through-holes 404 of the two linear bearings 4. In this way, the entire set of devices is assembled and can be put into use.

[0067] The definition rule of the swinging direction of the first bracket of the device for horizontally scribing on the inner wall of a square steel pipe provided by the present utility model.

[0068] Combined with Figures 2 to 4 As shown in the top view structural schematic diagram of the device of the present utility model, for the convenience of description, the eight first brackets 1 are respectively defined as ①, ②, ③, ④, ⑤, ⑥, ⑦, and ⑧. Among them, the sixteen first bearing sections 103 of the eight first brackets 1 are all swinging shafts;

[0069] Assume that initially, the eight first brackets 1 are all in the folded state, that is, the four first brackets 1 on the front and rear sides are all in the left and right settings, and the four first brackets 1 on the left and right sides are all in the front and rear settings. At this time, the eight refills 10 cannot scribe lines. After simplification, as shown in Figure 28 As shown, ①, ③, ⑤, and ⑦ simultaneously swing 90 degrees in the clockwise direction, and ②, ④, ⑥, and ⑧ simultaneously swing 90 degrees in the counterclockwise direction. Then, the eight first brackets 1 are all in the extended state. The swinging direction of the first bracket 1 is defined as the positive direction;

[0070] Assume that initially, the eight first brackets 1 are all in the extended state, that is, the four first brackets 1 on the front and rear sides are all in the front and rear settings, and the four first brackets 1 on the left and right sides are all in the left and right settings. At this time, the eight refills 10 can scribe lines. After simplification, as shown in Figure 29As shown, ①, ③, ⑤, and ⑦ simultaneously swing 90 degrees counterclockwise, and ②, ④, ⑥, and ⑧ simultaneously swing 90 degrees clockwise. Then, all eight first brackets 1 are in a folded state. For the sake of description, this swinging direction of the first bracket 1 is defined as the reverse direction.

[0071] The definition rule for the swinging direction of the second bracket of the device for transverse scribing on the inner wall of a square steel pipe provided by the present utility model.

[0072] Combined with Figures 2 to 4 As shown, based on the top view structural schematic diagram of the device of the present utility model, for the sake of convenient description, the four second brackets 2 are respectively defined as A, B, C, and D. Among them, the eight second bearing sections 203 of the four second brackets 2 are all swinging shafts.

[0073] Assume that initially the four second brackets 2 are all in the left - right setting, that is, the four opposite side faces of the four second bodies 201 of the four second brackets 2 can overlap with the four side faces of the two twelfth bosses 903 on the front and rear sides of the eighth bracket 9, so as to ensure that the eight first through - slots 204 of the four second brackets 2 can be in a through state with the four third through - slots 906 on the front and rear sides of the eighth bracket 9. After simplification, as Figure 30 shown, A and C simultaneously swing 90 degrees counterclockwise, and B and D simultaneously swing 90 degrees clockwise. Then, all four second brackets 2 are in the front - rear setting. For the sake of description, this swinging direction of the second bracket 2 is defined as the forward direction.

[0074] Assume that initially the four second brackets 2 are all in the front - rear setting, that is, the four opposite side faces of the four second bodies 201 of the four second brackets 2 can overlap with the four side faces of the two twelfth bosses 903 on the left and right sides of the eighth bracket 9, so as to ensure that the eight first through - slots 204 of the four second brackets 2 can be in a through state with the four third through - slots 906 on the left and right sides of the eighth bracket 9. After simplification, as Figure 31 shown, A and C simultaneously swing 90 degrees clockwise, and B and D simultaneously swing 90 degrees counterclockwise. Then, all four second brackets 2 are in the left - right setting. For the sake of description, this swinging direction of the second bracket 2 is defined as the reverse direction.

[0075] The usage method of the device for transverse scribing on the inner wall of a square steel pipe provided by the present utility model.

[0076] Step 1: Combined with Figure 1 and Figure 2As shown, initially, all eight of the first brackets 1 are in a folded state, and all four of the second brackets 2 are in a left-right arrangement. First, pass the square steel pipe 18 through the eight sixth brackets 7 and place it on the third body 301 of the third bracket 3, ensuring that all eight fourth bosses 303 are inserted into the square steel pipe 18. Then, along the four third bosses 302, move the two fourth brackets 5 to the position on the square steel pipe 18 where scribing is required.

[0077] Step 2: Then simultaneously swing the ①, ②, ⑤, and ⑥ forward by 90 degrees, i.e., the four first brackets 1 on the front and rear sides all change to a front-back arrangement. Then, along the eight first through slots 204 of the four second brackets 2 and the four third through slots 906 on the front and rear sides of the eighth bracket 9, move the two fifth bracket carts on the front and rear sides left and right. During this process, none of the four first brackets 1 can swing. The four pen cores 10 on the front and rear sides can then scribe the inner wall of the square steel pipe 18 horizontally, as Figure 3 shown.

[0078] Step 3: Then simultaneously swing the ①, ②, ⑤, and ⑥ backward by 90 degrees, i.e., the four first brackets 1 on the front and rear sides all change to a left-right arrangement. Move the two fifth bracket carts on the front and rear sides and place all eight wheels 15 in the four third through slots 906 on the front and rear sides of the eighth bracket 9. Then, simultaneously swing the A, B, C, and D forward by 90 degrees, i.e., the four second brackets 2 in the left-right arrangement all change to a front-back arrangement.

[0079] Step 4: Then simultaneously swing the ③, ④, ⑦, and ⑧ forward by 90 degrees, i.e., the four first brackets 1 on the left and right sides all change to a left-right arrangement. Then, along the eight first through slots 204 of the four second brackets 2 and the four third through slots 906 on the left and right sides of the eighth bracket 9, move the two fifth bracket carts on the left and right sides forward and backward. During this process, none of the four first brackets 1 can swing. The four pen cores 10 on the left and right sides can then scribe the inner wall of the square steel pipe 18 horizontally, as Figure 4 shown.

[0080] Supplementary description: The device for transverse scribing on the inner wall of a square steel pipe provided by the present utility model is designed with a symmetric structure. First, multiple specifications of the device of the present utility model should be designed and manufactured to match the diameter specification, wall thickness specification, and fixed length of the square steel pipe. Since the horizontal cross-sections of the second body of the second bracket and the twelfth boss of the eighth bracket are both isosceles trapezoids, and the base angles of the isosceles trapezoids are both 45 degrees, in this way, the eight sides of the four second bodies of the four second brackets can overlap with the eight sides of the four twelfth bosses of the eighth bracket, so as to ensure that the eight first through grooves of the four second brackets and the eight third through grooves of the eighth bracket are in a through state. The spring should be slightly compressed in advance, that is, a compressive force is applied to the spring in advance, so as to ensure that the pen core can rely on the elastic force to contact the inner wall of the square steel pipe and can freely scribe on the inner wall. The magnet is a symmetric structure in the shape of a cuboid. The fifth bracket, the eighth bracket, the wheels, and the hinge are all made of steel to ensure that when the sixteen wheels are all located within the eight third through grooves of the eighth bracket, the four fifth brackets can stand on the front, rear, left, and right end faces of the eighth bracket by magnetic force.

[0081] It can be seen from the embodiments that by using the device for transverse scribing on the inner wall of a square steel pipe provided by the present utility model, the purpose of transverse scribing on the inner wall of a square steel pipe can be achieved. The device of the present utility model has the characteristics of low manufacturing cost, simple operation, and good use effect.

[0082] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features.

Claims

1. An apparatus for transversely scribing on the inner wall of a square steel pipe, characterized in that, The device for transversely scribing on the inner wall of the square steel pipe includes: eight first brackets (1), four second brackets (2), one third bracket (3), two fourth brackets (5), four fifth brackets (6), eight sixth brackets (7), eight seventh brackets (8), one eighth bracket (9), two linear bearings (4), eight pen refills (10), sixteen first screws (11), eight second screws (12), twenty-four rolling bearings (13), eight springs (14), sixteen wheels (15), sixteen hinges (16) and eight magnets (17), wherein: The first bracket (1) is composed of a first body (101), a first boss (102) and two first bearing sections (103) connected. The first body (101) is a symmetric cuboid structure. The first boss (102) is located at the rear end face of the first body (101). The two first bearing sections (103) are arranged oppositely and are respectively located on the upper and lower end faces of the first body (101). The first boss (102) is a symmetric cylinder structure. A cylindrical first through hole (105) is provided at the axis part of the first boss (102), and the pen refill (10) is passed through the first through hole (105). External threads are provided at the end of the first boss (102) for screwing with the internal threads of the seventh bracket (8). A cylindrical first groove (104) is provided at the central part of the rear end face of the first body (101), and the spring (14) and the pen refill (10) are passed through the first groove (104). The first groove (104) and the first through hole (105) are coaxially connected. The first bearing section (103) is a symmetric cylinder structure for passing through the rolling bearing (13); The second bracket (2) is composed of two second bodies (201), a second boss (202) and two second bearing sections (203) connected. The two second bodies (201) are arranged oppositely. The second boss (202) is a symmetric cuboid structure. The second boss (202) is located between the two second bodies (201). The two second bearing sections (203) are arranged oppositely and are respectively located on the upper and lower end faces of the two second bodies (201). The horizontal section of the second body (201) is a symmetric isosceles trapezoid structure, and the base angle of the isosceles trapezoid is 45 degrees. A rectangular first through groove (204) is provided at the rear end face of the second body (201) for guiding the wheel (15). The second bearing section (203) is a symmetric cylinder structure for passing through the rolling bearing (13); The third bracket (3) is composed of a third body (301), four third bosses (302) and eight fourth bosses (303) connected together. The third body (301) is a symmetric cuboid structure. The four third bosses (302) are arranged in pairs opposite to each other and are located on the upper end face of the third body (301) at the same time. The eight fourth bosses (303) are divided into four groups and are located on the upper end face of the third body (301) at the same time. The third boss (302) is a symmetric cylindrical structure and is used for passing through the third through hole (404) of the linear bearing (4). The fourth boss (303) is a symmetric cylindrical structure and is used for internally positioning the square steel pipe. The fourth bracket (5) is composed of a fifth body (501) and four sixth bosses (502) connected together. The fifth body (501) is a symmetric cuboid structure. The four sixth bosses (502) are arranged in pairs opposite to each other and are located on the upper end face of the fifth body (501) at the same time. A fourth through hole (503) in the shape of a cuboid is provided in the middle part of the fifth body (501), and four fifth bosses (402) of the linear bearing (4) are passed through the fourth through hole (503). Four cylindrical fifth through holes (504) are evenly provided around the fourth through hole (503), and the second screws (12) are passed through the fifth through holes (504). The sixth boss (502) is a symmetric cylindrical structure, and a cylindrical second groove (505) is provided at the axis position of the upper end face of the sixth boss (502), and the rolling bearing (13) is passed through the second groove (505). A cylindrical sixth through hole (506) is provided at the axis position of the second groove (505), and the second bearing section (203) of the second bracket (2) is passed through the sixth through hole (506), and the sixth through hole (506) also penetrates through the fifth body (501). The fifth bracket (6) is composed of a sixth body (601), two seventh bosses (602) and eight eighth bosses (603) connected together. The sixth body (601), the seventh bosses (602) and the eighth bosses (603) are all symmetric structures in the shape of a cuboid. The two seventh bosses (602) are arranged oppositely and are both located on the front end face of the sixth body (601). The eight eighth bosses (603) are divided into four groups and are all located on the rear end face of the sixth body (601). Two first screw holes (604) are symmetrically formed in the seventh boss (602), and the first screws (11) are screwed into the first screw holes (604). A second through groove (605) in the shape of a cuboid can be formed between two eighth bosses (603) in each group, and the wheels (15) are inserted into the second through groove (605). A seventh through hole (606) in the shape of a cylinder is formed in the eighth boss (603), and the hinge (16) is inserted into the seventh through hole (606). The sixth bracket (7) is composed of two seventh bodies (701) and a ninth boss (702) connected together. The seventh bodies (701) and the ninth boss (702) are all symmetric structures in the shape of a cuboid. The two seventh bodies (701) are arranged oppositely, and the ninth boss (702) is located between the two seventh bodies (701). A third groove (703) in the shape of a cylinder is formed in the middle part of the upper end face of the seventh body (701), and the rolling bearing (13) is inserted into the third groove (703). An eighth through hole (704) in the shape of a cylinder is formed at the axis part of the third groove (703), and the first bearing section (103) of the first bracket (1) is inserted into the eighth through hole (704). Two ninth through holes (705) in the shape of a cylinder are symmetrically formed in the ninth boss (702), and the first screws (11) are inserted into the ninth through holes (705). The seventh bracket (8) is composed of a coaxially connected eighth body (801) and a tenth boss (802). The eighth body (801) and the tenth boss (802) are both symmetric structures in the shape of a cylinder. The tenth boss (802) is located on the rear end face of the eighth body (801). A fourth groove (803) in the shape of a cylinder is formed at the axis part of the front end face of the eighth body (801), and the refill (10) is inserted into the fourth groove (803). Internal threads are formed at the end of the eighth body (801) for screwing the external threads of the first bracket (1). A tenth through hole (804) in the shape of a cylinder is formed at the axis part of the tenth boss (802), and the refill (10) is inserted into the tenth through hole (804). The tenth through hole (804) and the fourth groove (803) are coaxially connected. The eighth bracket (9) is composed of a ninth body (901), four eleventh bosses (902) and four twelfth bosses (903). The ninth body (901) and the eleventh bosses (902) are both symmetric structures in the shape of a cuboid. The four eleventh bosses (902) are respectively located on the front, rear, left and right end faces of the ninth body (901). The four twelfth bosses (903) are respectively located on the front, rear, left and right end faces of the four eleventh bosses (902). A rectangular eleventh through hole (904) is provided in the middle part of the ninth body (901). Four fifth bosses (402) of the linear bearing (4) are inserted into the eleventh through hole (904). Four second screw holes (905) are evenly provided around the eleventh through hole (904). The second screws (12) are screwed into the second screw holes (905). The horizontal cross section of the twelfth boss (903) is a symmetric structure in the shape of an isosceles trapezoid. The base angle of the isosceles trapezoid is 45 degrees. Two rectangular third through grooves (906) are symmetrically provided on the end face of the twelfth boss (903) for guiding the wheel (15).

2. The device for transverse scribing on the inner wall of a square steel pipe according to claim 1, wherein The linear bearing (4) is composed of a fourth body (401) and four fifth bosses (402). The fourth body (401) is a symmetric structure in the shape of a cuboid. The four fifth bosses (402) are arranged in pairs opposite to each other and are located on the upper end face of the fourth body (401) at the same time. Four cylindrical second through holes (403) are symmetrically provided in the fourth body (401). The second screws (12) are inserted into the second through holes (403). The fifth boss (402) is a symmetric structure in the shape of a cylinder. A cylindrical third through hole (404) is provided in the axial part of the fifth boss (402). The third boss (302) of the third bracket (3) is inserted into the third through hole (404). The third through hole (404) also penetrates the fourth body (401). A cage, balls and a retaining ring are also provided in the fifth boss (402).

3. The device for transverse scribing on the inner wall of a square steel pipe according to claim 1, characterized in that, The refill (10), the first screw (11), the second screw (12), the rolling bearing (13), the spring (14), the wheel (15), the hinge (16) and the magnet (17) are all standard parts.

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