Steel bar cutting device for construction site

Abstract

The utility model relates to the technical field of construction equipment, in particular to a steel bar cutting device for a construction site, which comprises a cutting mechanism, a base plate and a clamping mechanism, the cutting mechanism comprises a knife rest, a rotating frame, a third rotating shaft, a tension spring, a motor, a first rotating shaft, a knife flywheel and a pressing handle, and the base plate is arranged below the knife flywheel and connected with the rotating frame; the clamping mechanism is arranged on the base plate and comprises a bottom plate, a fixing seat, a first moving block, a second moving block, a screw rod and a hand wheel, the bottom plate is connected with the base plate, the fixing seat is installed at one end of the bottom plate, the hand wheel is installed at the tail end of the screw rod, the tail end of the screw rod is installed in the fixing seat through a bearing, and two sections of threads opposite in rotating direction are arranged on the screw rod. The first moving block and the second moving block are installed on threads at the two ends of the screw correspondingly. The reinforcing steel bar cutting device can cut off redundant reinforcing steel bars obliquely exposed out of a roof and a wall face, the cutting face is smooth, and polishing and covering decoration in the later period are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of construction equipment, in particular to a steel bar cutting device for construction sites. Background Art

[0002] At present, high-rise buildings usually use reinforced concrete structures. After pouring concrete on the steel bar framework, there are often redundant steel bars protruding at the top and walls of the house, which need to be cut first, then polished and covered with cement to ensure the beauty of the house. The traditional method is to cut with a hand-held cutting machine, which is inefficient, time-consuming and labor-intensive.

[0003] In the prior art, the invention patent with the application publication number CN 111496135 A provides an automatic cutting device for redundant steel bars at the top of a building, including a machine body. Four pillars are slidably connected in the machine body, and a base is fixedly arranged on the lower side of the pillars. A lifting body is fixedly arranged on the right side of the machine body. A transmission cavity is arranged in the machine body, a lifting cavity is arranged in the lifting body, and a cutting device for cutting steel bars is arranged in the transmission cavity. The cutting device includes a first rotating shaft fixedly installed on the upper and lower side walls of the transmission cavity. A first gear and a second gear are fixedly arranged on the first rotating shaft. A second rotating shaft is rotatably connected to the upper side wall of the transmission cavity, and a third rotating shaft rotatably connected in the second rotating shaft is rotatably connected to the lower side wall of the transmission cavity. A first half gear and a second half gear are fixedly arranged on the second rotating shaft. A third half gear and a first belt pulley are fixedly arranged on the third rotating shaft. This device can automatically and quickly control and cut redundant steel bars without manual cutting, greatly reducing the cutting time and labor intensity, effectively improving the project progress and increasing the construction efficiency.

[0004] In the process of realizing the present utility model, the inventor found that there are at least the following problems in the prior art: 1. The patented technology can only cut the redundant steel bars protruding on the flat roof, and cannot cut the steel bars horizontally protruding from the walls of the house; 2. The redundant steel bars protruding from the house itself have a certain degree of curvature, and they are not perpendicular to the roof or wall. The cutting blade in the patented technology cannot cut perpendicular to the steel bars, affecting the cutting speed and the cutting surface of the steel bar is an inclined surface, which is not convenient to cover and affects the beauty of the building. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present utility model develops a steel bar cutting device for construction sites, which can cut redundant steel bars obliquely exposed on the roof and walls, and the cutting surface is flat, facilitating subsequent grinding and covering decoration.

[0006] The technical solution for the present utility model to solve the technical problem is as follows: An embodiment of the present utility model provides a steel bar cutting device for construction sites, which is used to cut the steel bars exposed on the wall surface and roof. It includes a cutting mechanism, and the cutting mechanism includes a tool rest, a rotating frame, a rotating shaft three, a tension spring, a motor, a rotating shaft one, a cutter wheel, and a pressing handle. The rotating shaft one is installed on the tool rest through a bearing seat, the cutter wheel is installed on the rotating shaft one, the motor is installed on the tool rest, the rotating shaft one is connected to the output shaft of the motor, the middle part of the tool rest is installed on the top of the rotating frame through the rotating shaft three, the pressing handle is installed on one side of the tool rest, the tension spring is installed on the side opposite to the pressing handle, and the two ends of the tension spring are respectively connected to the tool rest and the rotating frame. The steel bar cutting device further includes a base plate and a clamping mechanism. The base plate is arranged below the cutter wheel and is connected to the rotating frame; the clamping mechanism is arranged on the base plate, and the clamping mechanism includes a bottom plate, a fixed seat, a moving block one, a moving block two, a screw rod, and a hand wheel. The bottom plate is connected to the base plate, the fixed seat is installed at one end of the bottom plate, the hand wheel is installed at the end of the screw rod, the end of the screw rod is installed in the fixed seat through a bearing, and two sections of threads with opposite rotation directions are arranged on the screw rod. The moving block one and the moving block two are respectively installed on the two ends of the screw rod thread.

[0007] As an optimization, the clamping mechanism further includes a clamping block one and a clamping block two. The clamping block one and the clamping block two are respectively installed on the moving block one and the moving block two, and the clamping block one and the clamping block two are relatively provided with V-shaped openings.

[0008] As an optimization, a vertical plate is arranged at the V-shaped opening of the clamping block one, and two spaced vertical plates are arranged at the V-shaped opening of the clamping block two. The vertical plate of the clamping block one can be inserted between the two spaced vertical plates of the clamping block two.

[0009] As an optimization, a slide rail is arranged on the top surface of the bottom plate, and corresponding sliding grooves are arranged on the bottom surfaces of the moving block one and the moving block two. The moving block one and the moving block two are installed in the slide rail on the top surface of the bottom plate.

[0010] As an optimization, two sets of parallel clamping mechanisms are provided. The two sets of clamping mechanisms can increase the clamping area of the steel bars and make the fixation of the steel bar cutting device more stable.

[0011] As an optimization, a dovetail groove is arranged on the bottom surface of the bottom plate, a dovetail-shaped slide rail is arranged on the top surface of the base plate, the bottom plate is installed in the dovetail-shaped slide rail on the top surface of the base plate, a through threaded hole is arranged on the top surface of the bottom plate, and a positioning screw is installed in the threaded hole of the bottom plate. The bottom surface of the positioning screw is in contact with the base plate.

[0012] As an optimization, the rotary frame includes a frame body, a bushing, a second rotating shaft, a rotating rod, a positioning rod, and a spring. The frame body is L-shaped. The upper end of the frame body is connected to the tool rest through a third rotating shaft. The bushing is arranged at the lower end of the frame body. The second rotating shaft is installed on the base plate, and the bushing is installed on the second rotating shaft. A bearing is arranged between the bushing and the second rotating shaft. The rotating rod is a hollow tube. A counterbore is arranged at the front end of the rotating rod. The rotating rod is installed on the side of the bushing, and the front end of the rotating rod penetrates through the bushing. A stop block is arranged at the front end of the positioning rod. The rear end of the positioning rod penetrates through the rotating rod. The spring is arranged in the counterbore of the rotating rod and behind the stop block of the positioning rod.

[0013] As an optimization, a circle of positioning holes is evenly arranged radially on the second rotating shaft, and the size and position of the positioning holes correspond to the positioning rod.

[0014] As an optimization, a first pulley is arranged on the first rotating shaft, a second pulley is arranged on the output shaft of the motor, and a belt connects the first pulley and the second pulley.

[0015] As an optimization, a second protective cover is further arranged outside the belt, the first pulley, and the second pulley, and a first protective cover is further arranged above the cutter wheel.

[0016] The effects provided in the utility model content are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solutions have the following advantages or beneficial effects:

[0017] 1. The motor can drive the cutter wheel to rotate. Pressing down the pressure handle can drive the cutter wheel to move downward to cut the steel bar. When the pressure handle is released, the cutter wheel is pulled up under the action of the tension spring. Rotating the handwheel can drive the first clamping block and the second clamping block to move towards each other to clamp the steel bar, fix the cutting mechanism on the steel bar, and make the cutting device not restricted by the terrain. The steel bar cutting device can cut off the redundant steel bars exposed on the inclined roof and wall. The clamping mechanism is parallel to the cutter wheel. After the clamping mechanism clamps the steel bar, the cutter wheel is also perpendicular to the steel bar. No matter how the steel bar is inclined, it can ensure that the cutting surface is flat, which is convenient for later grinding and covering decoration.

[0018] 2. By arranging V-shaped openings on the first clamping block and the second clamping block, and the vertical plates at the V-shaped openings of the two clamping blocks can cross and overlap, the clamping mechanism can clamp steel bars in a larger diameter range.

[0019] 3. By installing positioning screws in the threaded holes of the base plate, after fixing the two clamping mechanisms according to the length of the steel bar and then tightening the positioning screws, the clamping mechanism can be fixed on the base plate, making the fixation of the cutting mechanism more stable.

[0020] 4. Adjusting the angle of the rotating frame can change the angle between the clamping mechanism and the cutter wheel, so as to cut the complete steel bars. The positioning rod will squeeze the second shaft under the action of the spring, thereby fixing the rotating frame. When the angle of the rotating frame needs to be adjusted, pull the positioning rod to make it disengage from the second shaft, and then you can conveniently manually rotate and adjust the angle of the rotating frame.

[0021] 5. By radially arranging a positioning hole on the second rotating shaft, the positioning rod and the second rotating shaft can be fixed more firmly to avoid loosening of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a right side view of an embodiment of the utility model.

[0023] Figure 2 This is a front view of an embodiment of the utility model.

[0024] Figure 3 , Figure 4 It is a three-dimensional diagram of an embodiment of the utility model.

[0025] Figure 5 for Figure 3 A partial enlarged view of area A.

[0026] Figure 6 for Figure 2 Cross-sectional view along direction BB.

[0027] Figure 7 for Figure 2 A three-dimensional view after sectioning along the BB direction.

[0028] Figure 8 It is a three-dimensional diagram of the frame and the sleeve part in one embodiment of the utility model.

[0029] Figure 9 It is a three-dimensional diagram of the second rotating shaft in one embodiment of the utility model.

[0030] Figure 10 This is a working state diagram of another embodiment of the utility model.

[0031] Figure 11 This is a working state diagram of cutting steel bars on a wall in another embodiment of the utility model.

[0032] Figure 12 This is a working state diagram of cutting steel bars on a roof according to another embodiment of the utility model.

[0033] Wherein: tool rest 1, rotating frame 2, rotating shaft three 3, tension spring 4, motor 5, rotating shaft one 6, cutter wheel 7, pressing handle 8, base plate 9, clamping mechanism 10, first guard 11, second guard 12, wall surface 13, steel bar 14, roof 15, frame body 21, bushing 22, rotating shaft two 23, rotating rod 24, positioning rod 25, spring 26, bottom plate 101, fixed seat 102, first moving block 103, second moving block 104, screw rod 105, hand wheel 106, first clamping block 107, second clamping block 108. Specific implementation manner

[0034] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation manners and in conjunction with its attached drawings.

[0035] Figures 1 to 9 For the first embodiment of the present utility model, as Figure 1 shown, a steel bar cutting device for a construction site includes a cutting mechanism. The cutting mechanism includes a tool rest 1, a rotating frame 2, a rotating shaft three 3, a tension spring 4, a motor 5, a rotating shaft one 6, a cutter wheel 7, and a pressing handle 8. The rotating shaft one 6 is installed on the tool rest 1 through a bearing seat, the cutter wheel 7 is installed on the rotating shaft one 6, the motor 5 is installed on the tool rest 1, the rotating shaft one 6 is connected to the output shaft of the motor 5, the middle of the tool rest 1 is installed on the top of the rotating frame 2 through the rotating shaft three 3, the pressing handle 8 is installed on one side of the tool rest 1, the tension spring 4 is installed on the side opposite to the pressing handle 8, and both ends of the tension spring 4 are respectively connected to the tool rest 1 and the rotating frame 2. The steel bar cutting device further includes a base plate 9 and a clamping mechanism 10. The base plate 9 is arranged below the cutter wheel 7, and the base plate 9 is connected to the rotating frame 2; the clamping mechanism 10 is arranged on the base plate 9.

[0036] As Figure 4 shown, a first pulley is arranged on the rotating shaft one 6, a second pulley is arranged on the output shaft of the motor 5, and a belt connects the first pulley and the second pulley.

[0037] As Figure 5 shown, the clamping mechanism 10 includes a bottom plate 101, a fixed seat 102, a first moving block 103, a second moving block 104, a screw rod 105, and a hand wheel 106. The bottom plate 101 is connected to the base plate 9, the fixed seat 102 is installed at one end of the bottom plate 101, the hand wheel 106 is installed at the end of the screw rod 105, the end of the screw rod 105 is installed in the fixed seat 102 through a bearing, two threads with opposite rotation directions are arranged on the screw rod 105, and the first moving block 103 and the second moving block 104 are respectively installed on the two ends of the screw rod 105. The clamping mechanism 10 further includes a first clamping block 107 and a second clamping block 108. The first clamping block 107 and the second clamping block 108 are respectively installed on the first moving block 103 and the second moving block 104, and the first clamping block 107 and the second clamping block 108 are oppositely provided with V-shaped openings.

[0038] A vertical plate is provided at the V-shaped opening of the clamping block 107, and two spaced vertical plates are provided at the V-shaped opening of the clamping block 2 108. The vertical plate of the clamping block 107 can be inserted between the two spaced vertical plates of the clamping block 2 108. By providing V-shaped openings on the clamping block 107 and the clamping block 2 108, and the vertical plates at the V-shaped openings of the two clamping blocks can cross and overlap, the clamping mechanism 10 can clamp the steel bars 14 with a larger diameter range.

[0039] The top surface of the bottom plate 101 is provided with a slide rail, and the bottom surfaces of the moving block 103 and the moving block 2 104 are provided with corresponding slide grooves. The moving blocks 103 and 104 are installed in the slide rail on the top surface of the bottom plate 101 .

[0040] The clamping mechanism 10 is provided in two parallel groups. The two groups of clamping mechanisms 10 can increase the clamping area of ​​the steel bar 14, and the fixing of the steel bar cutting device is more stable.

[0041] The bottom surface of the bottom plate 101 is provided with a dovetail groove, the top surface of the base plate 9 is provided with a dovetail slide rail, the bottom plate 101 is installed in the dovetail slide rail on the top surface of the base plate 9, the top surface of the bottom plate 101 is provided with a through threaded hole, and a positioning screw is installed in the threaded hole of the bottom plate 101, and the bottom surface of the positioning screw is in contact with the base plate 9. After fixing the two clamping mechanisms 10 according to the length of the steel bar 14, tighten the positioning screw, and the clamping mechanism 10 can be fixed on the base plate 9, so that the cutting mechanism is fixed more firmly.

[0042] like Figure 6 , Figure 7 As shown, the rotating frame 2 includes a frame body 21, a sleeve 22, a second rotating shaft 23, a rotating rod 24, a positioning rod 25, and a spring 26. The frame body 21 is L-shaped, and the upper end of the frame body 21 is connected to the tool holder 1 through the rotating shaft 3. The sleeve 22 is arranged at the lower end of the frame body 21, the second rotating shaft 23 is installed on the base plate 9, the sleeve 22 is installed on the second rotating shaft 23, and a bearing is arranged between the sleeve 22 and the second rotating shaft 23. The rotating rod 24 is a hollow tube, and a countersunk hole is arranged at the front end of the rotating rod 24. The rotating rod 24 is installed on the side of the sleeve 22, and the front end of the rotating rod 24 passes through the sleeve 22. The front end of the positioning rod 25 is provided with a stopper, and the rear end of the positioning rod 25 passes through the rotating rod 24. The spring 26 is arranged in the countersunk hole of the rotating rod 24, and the spring 26 is arranged at the rear end of the stopper of the positioning rod 25. Adjusting the angle of the rotating frame 2 can change the angle between the clamping mechanism 10 and the cutter wheel 7, so as to cut the complete steel bar 14 steel bar. The positioning rod 25 will press the second rotating shaft 23 under the action of the spring 26, so as to fix the rotating frame 2. When the angle of the rotating frame 2 needs to be adjusted, the positioning rod 25 is pulled to make it disengage from the second rotating shaft 23, so that the angle of the rotating frame 2 can be conveniently adjusted manually.

[0043] like Figure 9As shown, a circle of positioning holes are evenly arranged radially on the second rotating shaft 23, and the size and position of the positioning holes correspond to those of the positioning rod 25. By arranging the positioning holes radially on the second rotating shaft 23, the fixing of the positioning rod 25 and the second rotating shaft 23 can be made more firm, avoiding the loosening of the equipment.

[0044] The motor 5 can drive the cutter wheel 7 to rotate. Pressing down the handle 8 can drive the cutter wheel 7 to move downward to cut the steel bar. When the handle 8 is released, the cutter wheel 7 is pulled up under the action of the tension spring 4. Rotating the handwheel 106 can drive the first clamping block 107 and the second clamping block 108 to move towards each other to clamp the steel bar 14, fixing the cutting mechanism on the steel bar, so that the cutting device is not restricted by the terrain. The steel bar cutting device can cut the redundant steel bars 14 exposed obliquely on the roof 15 and the wall 13. The clamping mechanism 10 is parallel to the cutter wheel 7. After the clamping mechanism 10 clamps the steel bar 14, the cutter wheel 7 is also perpendicular to the steel bar 14. No matter how the steel bar 14 is inclined, the cutting surface can be guaranteed to be flat, which is convenient for later grinding and covering decoration.

[0045] Figures 10 to 12 This is the second embodiment of the present invention, and the difference from the first embodiment is that: a second protective cover 12 is further arranged outside the belt, the first pulley and the second pulley, and a first protective cover 11 is further arranged above the cutter wheel 7. As Figure 11 shown, when cutting the steel bar on the wall, the cutting mechanism is in a vertical state. As Figure 12 shown, when cutting the steel bar on the roof, the cutting mechanism is in a side-down state.

[0046] Although the specific implementation manners of the present invention are described above in conjunction with the drawings, it is not a limitation to the protection scope of the present invention. Based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. A steel bar cutting device for use on a construction site, used for cutting steel bars (14) exposed from a wall surface (13) and a roof (15), comprising a cutting mechanism, the cutting mechanism comprising a tool holder (1), a rotating frame (2), a rotating shaft three (3), a tension spring (4), a motor (5), a rotating shaft one (6), a cutter wheel (7), and a pressure handle (8), wherein the rotating shaft one (6) is mounted on the tool holder (1) through a bearing seat, the cutter wheel (7) is mounted on the rotating shaft one (6), the motor (5) is mounted on the tool holder (1), the rotating shaft one (6) is connected to the output shaft of the motor (5), the middle part of the tool holder (1) is mounted on the top of the rotating frame (2) through the rotating shaft three (3), the pressure handle (8) is mounted on one side of the tool holder (1), the tension spring (4) is mounted on the side opposite to the pressure handle (8), and the two ends of the tension spring (4) are respectively connected to the tool holder (1) and the rotating frame (2), wherein: The steel bar cutting device further comprises a base plate (9) and a clamping mechanism (10). The base plate (9) is arranged below the cutter wheel (7) and is connected to the rotating frame (2). The clamping mechanism (10) is arranged on the base plate (9). The clamping mechanism (10) comprises a bottom plate (101), a fixed seat (102), a moving block 1 (103), a moving block 2 (104), a screw (105) and a hand wheel (106). The base plate (101) is connected to the base plate (9). The fixed seat (102) is mounted on one end of the base plate (101). The hand wheel (106) is mounted on the end of the screw (105). The end of the screw (105) is mounted in the fixed seat (102) via a bearing. The screw (105) is provided with two sections of threads with opposite rotation directions. The moving block 1 (103) and the moving block 2 (104) are respectively mounted on the threads at both ends of the screw (105).

2. A steel bar cutting device for use on a construction site according to claim 1, characterized in that: The clamping mechanism (10) further comprises a clamping block 1 (107) and a clamping block 2 (108). The clamping block 1 (107) and the clamping block 2 (108) are respectively mounted on the moving block 1 (103) and the moving block 2 (104). The clamping block 1 (107) and the clamping block 2 (108) are provided with V-shaped openings opposite to each other.

3. A steel bar cutting device for use at a construction site according to claim 2, characterized in that: A vertical plate is arranged at the V-shaped opening of the clamping block 1 (107), and two spaced vertical plates are arranged at the V-shaped opening of the clamping block 2 (108). The vertical plate of the clamping block 1 (107) can be inserted between the two spaced vertical plates of the clamping block 2 (108).

4. A steel bar cutting device for use at a construction site according to claim 1, characterized in that: The top surface of the bottom plate (101) is provided with a slide rail, and the bottom surfaces of the moving block 1 (103) and the moving block 2 (104) are provided with corresponding slide grooves. The moving block 1 (103) and the moving block 2 (104) are installed in the slide rail on the top surface of the bottom plate (101).

5. The steel bar cutting device for use at a construction site according to claim 1, characterized in that: The clamping mechanisms (10) are arranged in two parallel groups.

6. A steel bar cutting device for use at a construction site according to claim 5, characterized in that: The bottom surface of the bottom plate (101) is provided with a dovetail groove, the top surface of the base plate (9) is provided with a dovetail slide rail, the bottom plate (101) is installed in the dovetail slide rail on the top surface of the base plate (9), the top surface of the bottom plate (101) is provided with a through threaded hole, a positioning screw is installed in the threaded hole of the bottom plate (101), and the bottom surface of the positioning screw is in contact with the base plate (9).

7. A steel bar cutting device for use at a construction site according to claim 1, characterized in that: The rotating frame (2) comprises a frame body (21), a shaft sleeve (22), a second rotating shaft (23), a rotating rod (24), a positioning rod (25), and a spring (26); the frame body (21) is L-shaped; the upper end of the frame body (21) is connected to the tool holder (1) via a third rotating shaft (3); the shaft sleeve (22) is arranged at the lower end of the frame body (21); the second rotating shaft (23) is mounted on a base plate (9); the shaft sleeve (22) is mounted on the second rotating shaft (23); the shaft sleeve (22) and the tool holder (1) are connected to each other. A bearing is arranged between the second rotating shaft (23); the rotating rod (24) is a hollow tube; a countersunk hole is arranged at the front end of the rotating rod (24); the rotating rod (24) is installed on the side of the shaft sleeve (22); the front end of the rotating rod (24) passes through the shaft sleeve (22); a stopper is arranged at the front end of the positioning rod (25); the rear end of the positioning rod (25) passes through the rotating rod (24); a spring (26) is arranged in the countersunk hole of the rotating rod (24); and the spring (26) is arranged at the rear end of the stopper of the positioning rod (25).

8. A steel bar cutting device for use at a construction site according to claim 7, characterized in that: The second rotating shaft (23) is evenly and radially provided with a circle of positioning holes, the size and position of the positioning holes corresponding to the positioning rod (25).

9. The steel bar cutting device for use at a construction site according to claim 1, characterized in that: A pulley 1 is arranged on the rotating shaft 1 (6), a pulley 2 is arranged on the output shaft of the motor (5), and a belt connects the pulley 1 and the pulley 2.

10. A steel bar cutting device for use at a construction site according to claim 9, characterized in that: A second protective cover (12) is also arranged outside the belt, the first pulley and the second pulley, and a first protective cover (11) is also arranged above the cutter wheel (7).

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