Beam clamp type hole milling device

Abstract

The utility model discloses a beam clamp type hole milling device which comprises a fixed clamping plate assembly, a movable clamping plate assembly, a movable vertical rod assembly and a sliding rail assembly. The movable clamping plate assembly is movably arranged on the fixed clamping plate assembly, so that a clamping gap matched with the thickness of the beam body is formed between one end of the fixed clamping plate assembly and the movable clamping plate assembly, and the fixed clamping plate assembly and the movable clamping plate assembly are clamped at the hole milling position of the beam body through the clamping gap; the movable vertical rod assembly is movably arranged at the other end of the fixed clamping plate assembly, the sliding rail assembly is arranged on the movable vertical rod assembly in a lifting mode, and the hole milling equipment is arranged on the sliding rail assembly in a sliding mode and faces the hole milling position of the beam body. The utility model relates to the technical field of constructional engineering, and can solve the problems of position hole milling deviation and time and labor waste in operation of manual hole milling in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering, in particular to a beam clamp type hole milling device. Background Art

[0002] During the construction process of a building project, in order to install other components, equipment, etc. on the beam body, it is often necessary to mill holes on the beam body through a hole milling device. At present, the conventional method of beam body milling hole construction is still manual hole milling, that is, the construction personnel hold the hole milling equipment and perform the hole milling operation on the beam body. Since the stability of the hole milling equipment held by the construction personnel cannot be guaranteed, the position of the milling hole on the beam body is easy to deviate from the designed hole milling position, and the milling hole forming effect is poor. At the same time, since the construction personnel hold the hole milling equipment to perform operations at heights, the operation is time-consuming and labor-intensive, and there are certain safety hazards. Therefore, it is necessary to provide a beam clamp type hole milling device that can solve the problems of position hole milling deviation and time-consuming and labor-intensive operation in the prior art of manual hole milling. Summary of the invention

[0003] The utility model aims to provide a beam clamp type hole milling device, which can solve the problems of position hole milling deviation and time-consuming and laborious operation in the prior art manual hole milling.

[0004] The utility model is achieved in this way:

[0005] A beam clamp type milling hole device comprises a fixed clamping plate assembly, a movable clamping plate assembly, a movable vertical pole assembly and a slide rail assembly; the movable clamping plate assembly can be movably arranged on the fixed clamping plate assembly, so that a clamping gap matching the thickness of the beam body is formed between one end of the fixed clamping plate assembly and the movable clamping plate assembly, and the fixed clamping plate assembly and the movable clamping plate assembly are clamped at the milling hole position of the beam body through the clamping gap; the movable vertical pole assembly can be movably arranged on the other end of the fixed clamping plate assembly, the slide rail assembly can be lifted and lowered on the movable vertical pole assembly, and the milling hole equipment can be slidably arranged on the slide rail assembly and arranged facing the milling hole position of the beam body.

[0006] The fixed clamping plate assembly includes a fixed clamping plate, a first positioning rod and a second positioning rod; one end of a pair of first positioning rods is respectively vertically fixedly connected to the fixed clamping plate, and a pair of movable clamping plate assemblies are respectively movably arranged on the pair of first positioning rods, so that a clamping gap is formed between the pair of fixed clamping plates and the pair of movable clamping plate assemblies; the second positioning rod is connected between the other ends of the pair of first positioning rods, and the movable vertical pole assembly is movably arranged on the second positioning rod.

[0007] The first positioning rod is provided with a plurality of adjustment holes at intervals, and one end of the positioning block is inserted into the first positioning rod through one of the adjustment holes and abuts against one end of the movable clamping plate assembly away from the beam body.

[0008] The adjustment hole comprises a vertical adjustment hole penetrating the first positioning rod along the height direction of the first positioning rod and a transverse adjustment hole penetrating the first positioning rod along the width direction of the first positioning rod, and the vertical adjustment hole and the transverse adjustment hole are staggered.

[0009] The movable clamping plate assembly comprises a movable clamping plate, a tightening rod and a clamping head; a sliding sleeve is formed at the bottom of the movable clamping plate and is slidably sleeved on the first positioning rod and abuts against the positioning block, and a threaded sleeve is formed at the top of the movable clamping plate and is threadedly screwed with the tightening rod; the clamping head is arranged at one end of the tightening rod and faces the beam body, and a handle is arranged at the other end of the tightening rod.

[0010] The clamping head is provided with an anti-skid pad at one end facing the beam body, and the fixed clamping plate is provided with an anti-skid pad at one end facing the beam body, so that the clamping head and the fixed clamping plate are clamped on two surfaces of the beam body respectively through the anti-skid pads.

[0011] The movable vertical pole assembly includes a vertical pole and a locking piece; the locking piece is installed at the bottom of the vertical pole, an adjustment groove parallel to the surface of the beam body is formed on the second positioning rod, the vertical pole is movably arranged on the second positioning rod along the adjustment groove and locked on the second positioning rod by the locking piece; the slide rail assembly is liftably arranged on the vertical pole.

[0012] The slide rail assembly includes a fixed pipe clamp, a slide rail and a mounting portion; the fixed pipe clamp is liftably sleeved on the vertical pole and locked on the vertical pole; one end of the mounting portion is fixedly connected to the fixed pipe clamp, and the other end of the mounting portion extends toward the beam body; the slide rail is arranged on the mounting portion, and the milling hole equipment is movably arranged on the mounting portion through the slide rail, so that the drill bit of the milling hole equipment is arranged facing the beam body.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model is provided with a fixed clamping plate assembly and a movable clamping plate assembly. The movable clamping plate drives the clamping head to move along the first positioning rod close to the beam body, and the fixed clamping plate and the clamping head clamp the beam body from both sides, so that the milling equipment is fixed to the beam body through the beam clamp type milling device, so that it is convenient for the milling equipment to mill holes on the beam body without holding, which greatly reduces the labor intensity of construction personnel, saves time and effort in operation, and can improve the stability and safety of the milling equipment during the milling process, ensuring the quality of the milling holes. At the same time, the clamping structure is convenient and quick to disassemble and assemble, and will not cause damage to the beam body. It is suitable for beams of different thicknesses and milling operations at different positions on the beam body.

[0015] 2. The utility model is provided with a movable upright pole assembly and a slide rail assembly. The movable upright pole assembly is used to move on the second positioning rod parallel to the length direction of the beam body, and the slide rail assembly is used to move along the upright pole parallel to the height direction of the beam body, so that the drill bit of the milling hole device arranged on the slide rail assembly is accurately matched with the milling hole position, ensuring the accuracy and no deviation of the milling hole position. At the same time, the slide rail of the slide rail assembly is used to provide guidance and support for the drilling of the milling hole device, ensuring the stability of the milling hole device during the milling hole process, which is conducive to improving the quality of the milling hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the beam clamp type hole milling device of the utility model;

[0017] Figure 2 It is a three-dimensional diagram of a fixed clamping plate assembly in the beam clamp type hole milling device of the utility model;

[0018] Figure 3 It is a three-dimensional diagram of the movable clamping plate assembly in the beam clamp type hole milling device of the utility model;

[0019] Figure 4 It is a three-dimensional diagram of a movable upright pole assembly in the beam clamp type hole milling device of the utility model;

[0020] Figure 5 It is a stereoscopic diagram of a slide rail assembly in the beam clamp type hole milling device of the utility model.

[0021] In the figure, 1 is a fixed splint assembly, 2 is a movable splint assembly, 3 is a positioning block, 4 is a movable vertical pole assembly, 5 is a slide rail assembly, 6 is a milling hole device, 7 is a fixed pipe clamp, 8 is a fixed splint, 9 is a first positioning rod, 901 is an adjustment hole, 10 is a second positioning rod, 1001 is an adjustment groove, 11 is an anti-slip pad, 12 is a movable splint, 1201 is a sliding sleeve, 1202 is a threaded sleeve, 13 is a tightening rod, 1301 is a handle, 14 is a clamping head, 15 is a vertical pole, 16 is a screw rod, 17 is a nut, 18 is a slide rail, 19 is a mounting portion, 20 is a bolt and nut group, and 21 is a beam body. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Please see attached Figure 1A beam clamp type milling hole device comprises a fixed clamping plate assembly 1, a movable clamping plate assembly 2, a movable upright pole assembly 4 and a slide rail assembly 5; the movable clamping plate assembly 2 is movably arranged on the fixed clamping plate assembly 1, so that a clamping gap matching the thickness of the beam body 21 is formed between one end of the fixed clamping plate assembly 1 and the movable clamping plate assembly 2, and the fixed clamping plate assembly 1 and the movable clamping plate assembly 2 are clamped at the milling hole position of the beam body 21 through the clamping gap; the movable upright pole assembly 4 is movably arranged on the other end of the fixed clamping plate assembly 1, the slide rail assembly 5 is liftably arranged on the movable upright pole assembly 4, and the milling hole device 6 is slidably arranged on the slide rail assembly 5 and is arranged facing the milling hole position of the beam body 21.

[0024] The movable clamping plate assembly 2 can be flexibly moved on the fixed clamping plate assembly 1, and is used to adjust the width of the clamping gap formed between the movable clamping plate assembly 2 and the fixed clamping plate assembly 1 to match the thickness of the beam body 21. It can be applicable to beam bodies 21 of different thicknesses and has a wide range of application scenarios.

[0025] The movable pole assembly 4 can move on the fixed clamping plate assembly 1 along the length direction parallel to the beam body 21, and is used to match the horizontal position of the drill bit of the milling hole device 6 with the horizontal position of the milling hole position on the beam body 21. The slide rail assembly 5 can move on the movable pole assembly 4 along the height direction parallel to the beam body 21, and is used to match the vertical position of the drill bit of the milling hole device 6 with the vertical position of the milling hole position on the beam body 21, thereby ensuring that the drill bit of the milling hole device 6 can accurately match the designed position of the milling hole.

[0026] The slide rail assembly 5 is used to provide sliding guidance for the drill bit of the milling device 6, ensuring that the drill bit of the milling device 6 mills holes on the beam body 21 along the milling hole position, improving the quality and accuracy of the milling holes, avoiding milling hole position deviation, and saving time and effort in operation.

[0027] Please see attached Figure 1 and attached Figure 2 The fixed splint assembly 1 includes a fixed splint 8, a first positioning rod 9 and a second positioning rod 10; one end of a pair of first positioning rods 9 is vertically fixed to the fixed splint 8, and a pair of movable splint assemblies 2 are movably arranged on the pair of first positioning rods 9, so that a clamping gap is formed between the pair of fixed splints 8 and the pair of movable splint assemblies 2; the second positioning rod 10 is connected between the other ends of the pair of first positioning rods 9, and the movable vertical pole assembly 4 is movably arranged on the second positioning rod 10.

[0028] Preferably, the first positioning rod 9 can be made of square steel and arranged along the thickness direction of the beam body 21 .

[0029] Preferably, the fixed splint 8 can be made of a wedge-shaped plate, and the side of the fixed splint 8 close to the beam body 21 is a vertical surface to ensure the fit with the beam body 21, and the side of the fixed splint 8 away from the beam body 21 is a wedge-shaped surface that is thin on the top and thick on the bottom, thereby improving the force stability and clamping reliability of the fixed splint 8 when clamping the beam body 21.

[0030] Preferably, the second positioning rod 10 can be made of angle steel, the vertical section of the angle steel is welded between a pair of first positioning rods 9, and the horizontal section of the angle steel is used for movably installing the movable vertical pole assembly 4. The length of the angle steel can be adaptively adjusted according to the moving range.

[0031] Please see attached Figure 2 The first positioning rod 9 is provided with a plurality of adjustment holes 901 at intervals. One end of the positioning block 3 is inserted into the first positioning rod 9 through one of the adjustment holes 901 and abuts against one end of the movable clamping plate assembly 2 away from the beam body 21 .

[0032] Preferably, the positioning block 3 can be a wedge-shaped plate, and the adjustment hole 901 can be an elongated groove. By inserting the positioning block 3 into the elongated groove, the positioning block 3 is locked on the first positioning rod 9, and by abutting the movable clamping plate assembly 2, the movable clamping plate assembly 2 is limited to unidirectionally move away from the beam body 21, thereby preventing the entire device from loosening from the beam body 21.

[0033] Please see attached Figure 2 The adjustment hole 901 includes a vertical adjustment hole that penetrates the first positioning rod 9 along the height direction of the first positioning rod 9 and a transverse adjustment hole that penetrates the first positioning rod 9 along the width direction of the first positioning rod 9. The vertical adjustment hole and the transverse adjustment hole are staggered.

[0034] Preferably, the length of the vertical adjustment hole is consistent with the length of the transverse adjustment hole, and the staggered spacing between the vertical adjustment hole and the transverse adjustment hole along the length direction of the hole is 1 / 2 of the length of the adjustment hole, so that the positioning block 3 can be plugged in and tightened the movable clamping plate assembly 2 from different directions, so that the adjustment accuracy of the limit position of the movable clamping plate assembly 2 is high, which is beneficial to the tightening and clamping of the beam body 21 by the movable clamping plate assembly 2, and has good adaptability to beam bodies 21 of different thicknesses.

[0035] Please see attached Figure 1 and attached Figure 3 The movable splint assembly 2 includes a movable splint 12, a tightening rod 13 and a clamping head 14; a sliding sleeve 1201 is formed at the bottom of the movable splint 12 and is slidably sleeved on the first positioning rod 9 and abuts against the positioning block 3, and a threaded sleeve 1202 is formed at the top of the movable splint 12 and is threadedly screwed with the tightening rod 13; the clamping head 14 is arranged at one end of the tightening rod 13 and faces the beam body 21, and a handle 1301 is provided at the other end of the tightening rod 13.

[0036] Preferably, the sliding sleeve 1201 can be made of square steel that is one size larger than the first positioning rod 9, so as to slide flexibly on the first positioning rod 9, thereby adjusting the position of the movable clamping plate 12 so that the movable clamping plate 12 can fit the clamping head 14 to the beam body 21.

[0037] The clamping rod 13 is threadedly matched with the threaded sleeve 1202. When the clamping rod 13 is rotated by the handle 1301, the threaded sleeve 1202 cannot rotate due to the limitation of the square steel shape. The rotation of the clamping rod 13 is converted into axial linear motion of the clamping rod 13 by the thread, so that the clamping head 14 can press and fix or release the beam body 21 by screwing the clamping rod 13 in and out.

[0038] The clamping of the entire device on the beam body 21 is ensured by the clamping of the clamping head 14 and the fixing clamping plate 8 on both sides of the beam body 21, so that the milling equipment 6 is placed on the beam body 21, which is convenient for milling operation without holding, and the milling process is more stable, saving time and effort.

[0039] Please see attached Figure 2 and attached Figure 3 The end of the clamping head 14 facing the beam body 21 is provided with an anti-slip pad 11, and the end of the fixed clamping plate 8 facing the beam body 21 is provided with an anti-slip pad 11, so that the clamping head 14 and the fixed clamping plate 8 are clamped on the two surfaces of the beam body 21 respectively through the anti-slip pad 11.

[0040] Preferably, the anti-skid pad 11 can be made of rubber material, which has a good anti-skid effect and can ensure the clamping stability of the beam body 21 by the clamping head 14 and the fixed clamping plate 8 through compression deformation.

[0041] Please see attached Figure 2 and attached Figure 4 The movable vertical pole assembly 4 includes a vertical pole 15 and a locking piece; the locking piece is installed at the bottom of the vertical pole 15, and an adjustment groove 1001 parallel to the surface of the beam body 21 is formed on the second positioning rod 10. The vertical pole 15 is movably arranged on the second positioning rod 10 along the adjustment groove 1001 and locked on the second positioning rod 10 by the locking piece; the slide rail assembly 5 is liftably arranged on the vertical pole 15.

[0042] The adjustment slot 1001 is used to move and adjust the position of the vertical rod 15 so that the horizontal position of the milling hole device 6 matches the horizontal position of the milling hole position. Preferably, the locking member can be a screw 16 and a nut 17, and the diameter of the screw 16 is slightly smaller than the width of the adjustment slot 1001, so that the screw 16 passes through the adjustment slot 1001; when the nut 17 is screwed in, the nut 17 and the vertical rod 15 are clamped at the bottom and top of the horizontal section of the second positioning rod 10 respectively, and when the nut 17 is screwed out, the vertical rod 15 can move along the adjustment slot 1001, thereby ensuring the movement flexibility and locking reliability of the vertical rod 15.

[0043] Please see attached Figure 1 and attached Figure 5 The slide rail assembly 5 includes a fixed pipe clamp 7, a slide rail 18 and a mounting portion 19; the fixed pipe clamp 7 is liftably sleeved on the vertical pole 15 and is locked on the vertical pole 15 by a bolt and nut set 20; one end of the mounting portion 19 is fixedly connected to the fixed pipe clamp 7, and the other end of the mounting portion 19 extends toward the beam body 21; the slide rail 18 is arranged on the mounting portion 19, and the milling hole device 6 is movably arranged on the mounting portion 19 through the slide rail 18, so that the drill bit of the milling hole device 6 is arranged facing the beam body 21.

[0044] Preferably, the pipe clamp 7 can be fixed with a clamp, and a pair of semicircular clamps can be clamped on the vertical pole 15 by a bolt and nut set 20, so that the height of the milling hole device 6 is consistent with the height of the milling hole position, ensuring the accuracy of the milling hole position without deviation.

[0045] The milling hole device 6 can adopt a handheld water drill of the prior art, and the mounting portion 19 can adopt a long strip structure, which is used to provide sliding support for the milling hole device 6 between the fixed pipe clamp 7 and the beam body 21. The slide rail 18 can be arranged on the mounting portion 19 along the drilling direction of the milling hole device 6, and a slider matching the slide rail 18 can be arranged at the bottom of the milling hole device 6. The sliding guide between the slide rail 18 and the slider is used to improve the stability of the screwing process of the milling hole device 6, thereby ensuring the quality of the milling hole and the accuracy of the milling hole position.

[0046] Please see attached Figure 1 To Attachment Figure 5 , the usage method and working principle of the utility model are:

[0047] A pair of fixing clamps 8 are placed on one side of the beam body 21 and attached to one side surface of the beam body 21 via an anti-slip pad 11 , and a pair of first positioning rods 9 are attached to the bottom surface of the beam body 21 .

[0048] Move the sliding sleeve 1201 along the length direction of a pair of first positioning rods 9, so that a pair of movable clamps 12 drive a pair of clamping heads 14 to move to the other side of the beam body 21, and insert a pair of positioning blocks 3 into one of the adjustment holes 901 of a pair of first positioning rods 9, so that the positioning blocks 3 abut against the sliding sleeve 1201 to limit its movement in the direction away from the beam body 21.

[0049] The handle 1301 is used to drive the clamping rod 13 to rotate, and the threaded sleeve 1202 is used to convert the rotation of the clamping rod 13 into axial linear movement of the clamping rod 13 through threaded transmission, so that a pair of clamping rods 13 drive a pair of clamping heads 14 to press the beam body 21, and the deformation of the anti-slip pads 11 on both sides of the beam body 21 is used to ensure the clamping effect of the beam body 21, so that the entire device is fixed on the beam body 21 through a three-way limit clamping of a pair of fixed clamps 8, a pair of first positioning rods 9 and a pair of clamping heads 14.

[0050] According to the milling hole position on the beam body 21, move the vertical pole 15 along the adjustment slot 1001 to make the drill bit of the milling hole device 6 consistent with the horizontal position of the milling hole position, rotate the nut 17 to make the nut 17 press against the bottom surface of the second positioning rod 10, and the vertical pole 15 presses against the top surface of the second positioning rod 10 to lock the vertical pole 15. Slide the fixed pipe clamp 7 along the vertical pole 15 to make the drill bit of the milling hole device 6 consistent with the vertical position of the milling hole position, and lock the fixed pipe clamp 7 on the vertical pole 15 through the bolt and nut set 20, so that the drill bit of the milling hole device 6 is aligned with the milling hole position on the beam body 21.

[0051] The milling device 6 is moved along the slide rail 18 to approach the beam body 21, so that the drill bit of the milling device 6 is against the surface of the beam body 21. By rotating the push rocker of the milling device 6, the drill bit of the milling device 6 works forward and mills a hole on the beam body 21. The milling process of the milling device 6 can be determined according to the actual method of using the milling device, which will not be repeated here.

[0052] After the milling hole is completed, the positioning block 3 is pulled out, and the sliding sleeve 1201 is moved to make the clamping head 14 away from the beam body 21, and the entire device can be removed from the beam body 21.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A beam clamp type milling hole device, characterized by: The invention comprises a fixed clamping plate assembly (1), a movable clamping plate assembly (2), a movable vertical pole assembly (4) and a slide rail assembly (5); the movable clamping plate assembly (2) is movably arranged on the fixed clamping plate assembly (1), so that a clamping gap matching the thickness of the beam body (21) is formed between one end of the fixed clamping plate assembly (1) and the movable clamping plate assembly (2), and the fixed clamping plate assembly (1) and the movable clamping plate assembly (2) are clamped at the milling hole position of the beam body (21) through the clamping gap; the movable vertical pole assembly (4) is movably arranged on the other end of the fixed clamping plate assembly (1), the slide rail assembly (5) is movably arranged on the movable vertical pole assembly (4), and the milling hole device (6) is slidably arranged on the slide rail assembly (5) and is arranged facing the milling hole position of the beam body (21).

2. The beam clamp type milling hole device according to claim 1 is characterized in that: The fixed clamping plate assembly (1) comprises a fixed clamping plate (8), a first positioning rod (9) and a second positioning rod (10); one end of a pair of first positioning rods (9) are respectively vertically fixed to the fixed clamping plate (8), and a pair of movable clamping plate assemblies (2) are respectively movably arranged on the pair of first positioning rods (9), so that a clamping gap is formed between the pair of fixed clamping plates (8) and the pair of movable clamping plate assemblies (2); the second positioning rod (10) is connected between the other ends of the pair of first positioning rods (9), and the movable vertical rod assembly (4) is movably arranged on the second positioning rod (10).

3. The beam clamp type milling hole device according to claim 2 is characterized in that: The first positioning rod (9) is provided with a plurality of adjustment holes (901) formed at intervals, and one end of the positioning block (3) is inserted into the first positioning rod (9) through one of the adjustment holes (901) and abuts against an end of the movable clamping plate assembly (2) away from the beam body (21).

4. The beam clamp type milling hole device according to claim 3 is characterized in that: The adjustment hole (901) comprises a vertical adjustment hole penetrating the first positioning rod (9) along the height direction of the first positioning rod (9) and a transverse adjustment hole penetrating the first positioning rod (9) along the width direction of the first positioning rod (9), and the vertical adjustment hole and the transverse adjustment hole are staggered.

5. The beam clamp type milling hole device according to claim 3 is characterized in that: The movable clamping plate assembly (2) comprises a movable clamping plate (12), a clamping rod (13) and a clamping head (14); the bottom of the movable clamping plate (12) is formed with a sliding sleeve (1201) which is slidably sleeved on the first positioning rod (9) and abuts against the positioning block (3); the top of the movable clamping plate (12) is formed with a threaded sleeve (1202) which is threadedly screwed with the clamping rod (13); the clamping head (14) is arranged at one end of the clamping rod (13) and faces the beam body (21); the other end of the clamping rod (13) is provided with a handle (1301).

6. The beam clamp type milling hole device according to claim 5 is characterized in that: The end of the clamping head (14) facing the beam body (21) is provided with an anti-skid pad (11), and the end of the fixed clamping plate (8) facing the beam body (21) is provided with an anti-skid pad (11), so that the clamping head (14) and the fixed clamping plate (8) are respectively clamped on two surfaces of the beam body (21) through the anti-skid pad (11).

7. The beam clamp type milling hole device according to claim 2 is characterized in that: The movable vertical pole assembly (4) comprises a vertical pole (15) and a locking member; the locking member is installed at the bottom of the vertical pole (15); an adjustment groove (1001) parallel to the surface of the beam body (21) is formed on the second positioning rod (10); the vertical pole (15) is movably arranged on the second positioning rod (10) along the adjustment groove (1001) and is locked on the second positioning rod (10) by the locking member; the slide rail assembly (5) is liftably arranged on the vertical pole (15).

8. The beam clamp type milling hole device according to claim 7 is characterized in that: The slide rail assembly (5) comprises a fixed pipe clamp (7), a slide rail (18) and a mounting portion (19); the fixed pipe clamp (7) is liftably sleeved on the vertical pole (15) and locked on the vertical pole (15); one end of the mounting portion (19) is fixedly connected to the fixed pipe clamp (7), and the other end of the mounting portion (19) extends toward the beam body (21); the slide rail (18) is arranged on the mounting portion (19), and the milling hole device (6) is movably arranged on the mounting portion (19) through the slide rail (18), so that the drill bit of the milling hole device (6) is arranged facing the beam body (21).

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