Rebar shearing machine

Abstract

The utility model discloses a reinforcing steel bar shearing machine belongs to reinforcing steel bar processing equipment technical field, and is mainly used for shearing reinforcing steel bar. The technical problem that the utility model wants to solve provides a reinforcing steel bar shearing machine, including being equipped with frame, shearing mechanism, transmission mechanism, and shearing mechanism includes fixed shearing disc and rotary shearing disc, and fixed shearing disc is equipped with first gap, and rotary shearing disc is equipped with second gap, and transmission mechanism includes first, second, third, fourth connecting rod located below shearing table, and fourth connecting rod is horizontally articulated on second mounting surface, and the end portion articulated has the third connecting rod of vertical setting, and the other end articulated of third connecting rod has second connecting rod, and first connecting rod one end is established in rotary shearing disc, and the other end links with gear mechanism of second connecting rod. Through the transmission mechanism located below shearing table and set, make operating personnel directly step fourth connecting rod to drive rotary shearing disc rotation, realize reinforcing steel bar shearing, reduce the fatigue degree of operating personnel, guarantee shearing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of steel bar processing equipment technology, and in particular to a steel bar shearing machine. Background Technology

[0002] In construction sites, steel bars are often cut to the required dimensions. Large-scale steel bar cutting can be performed using automated equipment such as steel bar saws. However, when only a small number of steel bars need to be cut, large equipment like steel bar saws is energy-intensive. In such cases, a manual steel bar shearing machine is necessary. Manual steel bar shearing machines do not require electricity or lubrication and can be used on complex construction sites or small construction sites. Specifically, a steel bar shearing device described in CN207914505U, "A Manual Steel Bar Shearing Device," includes a shearing blade comprising symmetrically placed blades I and II. The upper end of connecting rod I is movably hinged at the tail, and the lower end of connecting rod II is movably hinged at the tail of blade II. Connecting rod I and connecting rod II are located on the same side of the shearing blade. The lower end of connecting rod I and the upper end of connecting rod II are hinged together at one end of the rotating rod. The hinges are connected by pins. A wheel axle is fixed in the middle of the rotating rod. The wheel axle is rotatably connected to a roller. A guide block is set next to the roller. The outer surface of the guide block in the vertical direction is an arc-shaped surface. The roller can roll up and down along the arc-shaped surface. The inner surface of the guide block is connected to the tail of the shearing blade, and the guide block is vertically fixed on the mounting table.

[0003] However, when used by a single person, these manual rebar shearing devices require the operator to hold the rebar with one hand and operate the rotating rod with the other to drive blades I and II to shear the rebar. When the rebar is long and heavy, it is not easy to hold it with one hand, making it difficult to ensure the flatness of the rebar cut surface. In addition, the operator's repeated lifting and pulling of the rotating rod to shear the rebar will greatly increase the operator's arm fatigue and reduce the shearing efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a rebar shearing machine, mainly used for rebar shearing, so as to reduce operator fatigue and ensure shearing efficiency.

[0005] This utility model discloses a rebar shearing machine, including a frame, with a shearing table, a first mounting surface, and a second mounting surface spaced from top to bottom on the frame; it also includes a shearing mechanism and a transmission mechanism for driving the shearing mechanism. The shearing mechanism includes a fixed shearing disc mounted on the shearing table, and a rotating shearing disc mounted on the fixed shearing disc. The rotating shearing disc is coaxially arranged with the fixed shearing disc and rotatably connected to it. The fixed shearing disc has a first notch for rebar to pass through, and the rotating shearing disc has a second notch for rebar to pass through. The transmission mechanism includes a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod located below the shearing table. The fourth connecting rod is horizontally mounted on the second mounting surface via a hinge seat. The end of the fourth connecting rod is hinged to a vertically mounted third connecting rod, and the end of the third connecting rod away from the fourth connecting rod is hinged to a second connecting rod. One end of the first connecting rod is mounted on the rotating shearing disc and away from the second notch. A gear mechanism for driving the rotating shearing disc to rotate is provided between the first connecting rod and the second connecting rod, and the gear mechanism is mounted on the first mounting surface.

[0006] Furthermore, the gear mechanism includes a first gear and a second gear. The second gear is rotatably mounted on a first mounting surface via a mounting base. The end of the second connecting rod is disposed on the surface of the second gear to drive the second gear to rotate. The first gear is vertically arranged and meshes with the second gear for transmission. The end of the first connecting rod is disposed on the surface of the first gear to move up and down with the rotation of the first gear.

[0007] As a preferred embodiment, the frame is further provided with a top rod parallel to the first mounting surface. The top rod is disposed between the shearing table and the first mounting surface. One end of the top rod is fixed to the frame, and the other end abuts against the first connecting rod when it is moved to the lowest point.

[0008] Furthermore, the end of the fourth link furthest from the third link is connected to a laterally positioned foot pedal.

[0009] Furthermore, the shearing table is provided with a mounting plate, the mounting plate is provided with a third notch for the rebar to pass through, the fixed shearing disc is detachably mounted on the mounting plate, and the first notch and the third notch are aligned, the fixed shearing disc is provided with a rotating shaft at its center, the rotating shearing disc is rotatably mounted on the rotating shaft, and the rotating shearing disc is also provided with a limiting plate fixedly connected to the rotating shaft on the side away from the fixed shearing disc.

[0010] In a preferred embodiment, the fixed shearing disc is rotatably mounted on the mounting plate, and the fixed shearing disc is provided with a locking element for locking the fixed shearing disc. Multiple first notches are provided, each with a different width, and they are spaced apart on the fixed shearing disc along its circumference.

[0011] Furthermore, the frame is provided with casters at its lower part.

[0012] The beneficial effects of this utility model are as follows: By setting a transmission mechanism located below the shearing table, and by using a fourth connecting rod horizontally mounted on the second mounting surface at the bottom of the frame via a hinged seat, the operator can directly step on the fourth connecting rod to drive the rotating shearing disc to rotate, thereby achieving rebar shearing. This eliminates the need for the operator to repeatedly lift and pull the rotating rod to shear the rebar, reducing operator fatigue and ensuring shearing efficiency. At the same time, it frees up the operator's hands. When shearing rebars with large diameters and heavy weights, the operator can hold the rebar with both hands to ensure the flatness of the sheared surface. Attached Figure Description

[0013] Figure 1 : Front view of this utility model;

[0014] Figure 2 Left view of this utility model;

[0015] Figure 3 : Schematic diagram of a fixed shearing disk and a rotating shearing disk;

[0016] Figure 4 Top view of the fixed shearing disk and the rotating shearing disk;

[0017] Figure 5 : Schematic diagram of the fixed shear disc structure;

[0018] Reference numerals: 1-Frame; 11-Shearing table; 12-First mounting surface; 13-Second mounting surface; 14-Top rod; 15-Roller; 2-Shearing mechanism; 21-Fixed shearing disc; 211-First notch; 212-Rotating shaft; 213-Bolt; 214-Bolt hole; 22-Rotating shearing disc; 221-Second notch; 222-Shearing surface; 23-Mounting plate; 231-Third notch; 24-Limiting plate; 3-Transmission mechanism; 31-First connecting rod; 32-Second connecting rod; 33-Third connecting rod; 34-Fourth connecting rod; 341-Hinge seat; 342-Foot pedal; 35-Spherical hinge; 4-Gear mechanism; 41-First gear; 42-Second gear; 421-Mounting seat; 5-Reinforcing bar. Detailed Implementation

[0019] The present invention will be further described below.

[0020] This utility model provides a rebar shearing machine, mainly used for rebar shearing. It includes a frame 1, from which a shearing table 11, a first mounting surface 12, and a second mounting surface 13 are spaced apart from top to bottom. It also includes a shearing mechanism 2 and a transmission mechanism 3 for driving the shearing mechanism 2. The shearing mechanism 2 includes a fixed shearing disc 21 mounted on the shearing table 11, and a rotating shearing disc 22 mounted on the fixed shearing disc 21. The rotating shearing disc 22 is rotatably mounted on the fixed shearing disc 21. The fixed shearing disc 21 has a first notch 211 for rebar to pass through, and the rotating shearing disc 22 has a second notch 221 for rebar to pass through. The moving mechanism 3 includes a first connecting rod 31, a second connecting rod 32, a third connecting rod 33, and a fourth connecting rod 34 located below the shearing table 11. The fourth connecting rod 34 is horizontally arranged on the second mounting surface 13 via a hinge seat 341. The end of the fourth connecting rod 34 is hinged to the vertically arranged third connecting rod 33. The end of the third connecting rod 33 away from the fourth connecting rod 34 is hinged to the second connecting rod 32. One end of the first connecting rod 31 is arranged on the rotating shearing disk 22 and away from the second notch 221. A gear mechanism 4 for driving the rotating shearing disk 22 to rotate is provided between the first connecting rod 31 and the second connecting rod 32. The gear mechanism 4 is arranged on the first mounting surface 12.

[0021] like Figure 1 , Figure 2 As shown, the rebar shearing machine includes a frame 1, which is provided with a shearing table 11, a first mounting surface 12, and a second mounting surface 13 at intervals from top to bottom to provide mounting points. The shearing table 11 is a plane and is located on the top of the frame 1. Existing steel plates or sheet metal can be used as the shearing table 11. The first mounting surface 12 and the second mounting surface 13 can be flat plates or rods, as long as the normal operation of the transmission mechanism 3 and the gear mechanism 4 is ensured. A shearing mechanism 2 for shearing rebar is provided on the shearing table 11. The shearing mechanism 2 includes a fixed shearing disc 21 and a rotating shearing disc 22, as shown in the figure. Figure 1 , Figure 3As shown, the fixed shearing disc 21 can be mounted on the shearing table 11 via the mounting plate 23, or it can be directly welded vertically to the shearing table 11. The rotating shearing disc 22 is coaxially mounted with the fixed shearing disc 21 and rotatably mounted on the fixed shearing disc 21. Specifically, the rotating shearing disc 22 can be mounted on the fixed shearing disc 21 via the mounting shaft. The fixed shearing disc 21 has a first notch 211, and the rotating shearing disc 22 has a second notch 221. The second notch 221 has a shearing surface 222, and the first notch 211 also has a shearing surface 222. The two shearing surfaces 222 are arranged opposite to each other. The reinforcing bar 5 to be sheared passes through the first notch 211 and the second notch 221 in sequence. By rotating the rotating shearing disc 22, the channel through which the reinforcing bar passes between the second notch 221 and the first notch 211 is narrowed, thereby achieving the shearing of the reinforcing bar. To drive the rotating shearing disc 22 to rotate, a gear mechanism 4 is provided on the first mounting surface 12. The gear mechanism 4 is connected to a first connecting rod 31 connected to the rotating shearing disc 22. The gear mechanism 4 is driven by the first connecting rod 31 to rotate the gear. The rotational motion of mechanism 4 is converted into the rotational motion of the rotating shearing disc 22. To drive the rotation of gear mechanism 4, a second connecting rod 32 is also connected to gear mechanism 4. The other end of the second connecting rod 32 is hinged to a vertically arranged third connecting rod 33. The lower end of the third connecting rod 33 is hinged to a fourth connecting rod 34. The fourth connecting rod 34 is horizontally arranged on the second mounting surface 13 at the bottom of the frame 1 through a hinge seat 341. Since the fourth connecting rod 34 is horizontally arranged on the second mounting surface 13 at the bottom of the frame 1 through the hinge seat 341, by stepping on the fourth connecting rod 34, the third connecting rod 33 can be moved up and down through the lever principle. The third connecting rod 33 can then move one end of the second connecting rod 32 up and down, thereby driving gear mechanism 4 to start rotating. This, in turn, drives the first connecting rod 31 to move up and down, and then the first connecting rod 31 drives the rotating shearing disc 22 to start rotating, so as to achieve the shearing of steel bars. The hinges between the fourth connecting rod 34, the third connecting rod 33, and the second connecting rod 32 are connected by ball joints. By setting up a transmission mechanism 3 below the shearing table 11, and a fourth connecting rod 34 horizontally mounted on the second mounting surface 13 at the bottom of the frame 1 via a hinged seat 341, the operator can directly step on the fourth connecting rod 34 to drive the rotating shearing disc to rotate, thereby achieving rebar shearing. This eliminates the need for the operator to repeatedly lift the rotating rod to shear the rebar, reducing operator fatigue and ensuring shearing efficiency. At the same time, it frees up the operator's hands. When shearing large-diameter and heavy rebars, the operator can hold the rebar with both hands to ensure the flatness of the sheared surface.

[0022] Specifically, such as Figure 1 , Figure 2As shown, the gear mechanism 4 includes a first gear 41 and a second gear 42. The second gear 42 is rotatably mounted on the first mounting surface 12 via a mounting base 421. The end of the second connecting rod 32 is disposed on the surface of the second gear 42 to drive the second gear 42 to rotate. The first gear 41 is vertically arranged and meshes with the second gear 42 for transmission. The end of the first connecting rod 31 is disposed on the surface of the first gear 41 to move up and down with the rotation of the first gear 41. By setting the mounting base 421 on the first mounting surface 12, the second gear 42 is vertically mounted on the mounting base 421 and rotatably connected to the mounting base 421. The first gear 41 is disposed at the lower end of the first connecting rod 31 and meshes with the second gear 42 for transmission. By stepping on the fourth connecting rod 34, the third connecting rod 33 is driven to move up and down, and the third connecting rod 33 drives the second connecting rod 32 to move up and down. The end of the second connecting rod 32 is disposed on the surface of the second gear. The first gear 42 converts the linear motion of the second link 32 into the rotational motion of the second gear 42. The second gear 42 drives the first gear 41 to start rotating. The first link 31, which is fixed to the surface of the first gear 41, moves with the first gear 41. The first gear 41 includes a body and a rack that is set at the bottom of the body and protrudes downward to cooperate with the second gear 42. Since the first link 31 is set on the surface of the first gear 41, the distance between the first link 31 and the meshing point of the first gear 41 and the second gear 42 changes with the rotation of the first gear 41, thereby driving the rotating shearing disk 22 connected to the upper end of the first link 31 to rotate to shear the steel bar. The gear mechanism 4 can also be replaced by an existing cam mechanism, as long as the cam mechanism can rotate under the drive of the fourth link 34, the third link 33, and the second link 32, and drive the first link 31 to move up and down, thereby driving the rotating shearing disk 22 to rotate to shear the steel bar.

[0023] To ensure that the transmission mechanism 3 can automatically reset after driving the rotating shearing disc 22 to complete the steel bar shearing, such as Figure 2 As shown, the frame 1 is also provided with a top rod 14 parallel to the first mounting surface 12. The top rod 14 is disposed between the shearing table 11 and the first mounting surface 12. One end of the top rod 14 is fixed to the frame 1, and the other end abuts against the first connecting rod 31 when it moves to the lowest point. By setting the top rod 14 parallel to the first mounting surface 12, and the top rod 14 abutting against the first connecting rod 31 when it moves to the lowest point, even if the first connecting rod 31 is tilted when it swings down to the lowest point, the rotating shearing disc 22, the first connecting rod 31 and the first gear 41, the second connecting rod 32, the third connecting rod 33 and the fourth connecting rod 34 can be reset by gravity so that the steel bars can be sheared again.

[0024] Although the fourth link 34 can be directly stepped on to drive the third link 33 and the second link 32 to rotate the second gear 42, in order to increase the contact area between the fourth link 34 and the part stepped on by the operator, such as... Figure 2 As shown, the end of the fourth link 34 away from the third link 33 is connected to a horizontally arranged foot pedal 342.

[0025] To make this rebar shearing device applicable to shearing rebars of different diameters, such as... Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, the shearing table 11 is equipped with a mounting plate 23, which has a third notch 231 for the rebar to pass through. The fixed shearing disc 21 is detachably mounted on the mounting plate 23, and the first notch 211 and the third notch 231 are aligned. The mounting plate 23 on the shearing table 11 provides mounting points for the fixed shearing disc 21. The fixed shearing disc 21 is detachably mounted on the mounting plate 23. By changing the fixed shearing disc 21, different widths of the first notch 211 can be selected to cut rebars of different diameters. To facilitate secondary fixing of the rebar and reduce the operator's handling of the rebar while ensuring a flat cut surface, a third notch 231 for the rebar to pass through is provided on the mounting plate 23. The first notch 211 and the third notch 231 are aligned, and the rebar is cut using the rotating shearing disc 22. The fixed shearing disc 21 can be used as follows... Figure 3 , Figure 5 The bolt 213 shown in the diagram enables a detachable connection with the mounting plate 23. Alternatively, mortise and tenon joints, pins, or snap fasteners can also be used. The fixed shearing disc 21 is detachably mounted on the mounting plate, allowing for replacement of the first notch 211 with different sizes to facilitate the passage of reinforcing bars and accommodate the shearing of bars of different diameters. When the fixed shearing disc 21 is detachably connected to the mounting plate 23, the rotational connection between the rotating shearing disc 22 and the fixed shearing disc 21 can be achieved as follows: the fixed shearing disc 21 has a rotating shaft 212 oriented away from the mounting plate 23 at its center. The rotating shearing disc 22 is rotatably mounted on the rotating shaft 212. A limiting plate 24, fixedly connected to the rotating shaft 212, is also provided on the side of the rotating shearing disc 22 away from the fixed shearing disc 21. The limiting plate 24 prevents the rotating shearing disc 22 from detaching from the rotating shaft 212 during rotation, thus avoiding impact on the reinforcing bar shearing efficiency.

[0026] To facilitate the use of this rebar shearing machine for shearing rebars of different diameters without changing the fixed shearing disc 21, such as... Figure 1 , Figure 5As shown, the fixed shearing disc 21 is rotatably mounted on the mounting plate 23. The fixed shearing disc 21 is equipped with a locking element for locking the fixed shearing disc 21. Multiple first notches 211 are provided, each with a different width, and are spaced apart along the circumference of the fixed shearing disc 21. The rotatable mounting method between the fixed shearing disc 21 and the mounting plate 23 can be as follows: a rotating shaft 212 passes through the center of the fixed shearing disc 21 and is fixedly connected to the mounting plate 23, with the fixed shearing disc 21 rotatably mounted on the rotating shaft 212; or, a rotating rod is directly fixed at the center of the fixed shearing disc 21, and then the rotating rod passes through the mounting plate 23 and is rotatably connected to the mounting plate 23, so that the fixed shearing disc 21 is located outside the mounting plate 23 by rotation. The rotating rod drives the fixed shearing disc 21 to rotate, thereby adjusting the first notch 211 to be aligned with the third notch 231. Multiple first notches 211 of different widths are made on the fixed shearing disc 21, and the multiple first notches 211 are spaced apart along the circumference of the fixed shearing disc 21. When it is necessary to cut steel bars of different diameters, it is only necessary to rotate the fixed shearing disc 21 so that the first notch 211 of the corresponding size is rotated to the position aligned with the third notch 231. Then, the fixed shearing disc 21 is fixed by the locking device to ensure that the fixed shearing disc 21 will not move during the steel bar cutting process, thus affecting the steel bar cutting effect. The locking device can be a pin or a buckle to lock the position of the fixed shearing disc 21 and the mounting plate 23.

[0027] To facilitate the movement of the rebar shearing machine, such as Figure 1 , Figure 2 As shown, the frame 1 is provided with rollers 15 below it; the rollers 15 are provided so that the operator can move the steel bar shearing machine to the corresponding site for use as needed.

Claims

1. A rebar shearing machine, comprising a frame (1), wherein the frame (1) is provided with a shearing table (11), a first mounting surface (12), and a second mounting surface (13) spaced apart from top to bottom; characterized in that: It also includes a shearing mechanism (2) and a transmission mechanism (3) for driving the shearing mechanism (2). The shearing mechanism (2) includes a fixed shearing disc (21) disposed on a shearing table (11). A rotating shearing disc (22) is disposed on the fixed shearing disc (21). The rotating shearing disc (22) is rotatably disposed on the fixed shearing disc (21). A first notch (211) for the steel bar to pass through is opened on the fixed shearing disc (21). A second notch (221) for the steel bar to pass through is opened on the rotating shearing disc (22). The transmission mechanism (3) includes a first connecting rod (31), a second connecting rod (32), a third connecting rod (33), and a fourth connecting rod (34) located below the shearing table (11). The fourth connecting rod (34) is... The connecting rod (34) is horizontally arranged on the second mounting surface (13) via the hinge seat (341). The end of the fourth connecting rod (34) is hinged to the vertically arranged third connecting rod (33). The end of the third connecting rod (33) away from the fourth connecting rod (34) is hinged to the second connecting rod (32). The fourth connecting rod (34), the third connecting rod (33), and the second connecting rod (32) are connected by a ball joint. One end of the first connecting rod (31) is arranged on the rotating shearing disk (22) and away from the second notch (221). A gear mechanism (4) for driving the rotating shearing disk (22) to rotate is provided between the first connecting rod (31) and the second connecting rod (32). The gear mechanism (4) is arranged on the first mounting surface (12).

2. A rebar shearing machine as described in claim 1, characterized in that: The gear mechanism (4) includes a first gear (41) and a second gear (42). The second gear (42) is rotatably mounted on the first mounting surface (12) via a mounting base (421). The end of the second connecting rod (32) is disposed on the surface of the second gear (42) to drive the second gear (42) to rotate. The first gear (41) is vertically disposed and meshes with the second gear (42) for transmission. The end of the first connecting rod (31) is disposed on the surface of the first gear (41) to move up and down with the rotation of the first gear (41).

3. A rebar shearing machine as described in claim 2, characterized in that: The frame (1) is also provided with a top rod (14) parallel to the first mounting surface (12). The top rod (14) is located between the shearing table (11) and the first mounting surface (12). One end of the top rod (14) is fixed to the frame (1), and the other end abuts against the first connecting rod (31) when it moves to the lowest point.

4. A rebar shearing machine as described in claim 1, characterized in that: The fourth link (34) is connected to a laterally positioned foot pedal (342) at the end away from the third link (33).

5. A rebar shearing machine as described in claim 1, characterized in that: The shearing table (11) is provided with an installation plate (23), and the installation plate (23) is provided with a third notch (231) for the steel bar to pass through. The fixed shearing disc (21) is detachably installed on the installation plate (23), and the first notch (211) and the third notch (231) are aligned. The fixed shearing disc (21) has a rotating shaft (212) at its center. The rotating shearing disc (22) is rotatably installed on the rotating shaft (212). The rotating shearing disc (22) is also provided with a limiting plate (24) fixedly connected to the rotating shaft (212) on the side away from the fixed shearing disc (21).

6. A rebar shearing machine as described in claim 5, characterized in that: The fixed shearing disc (21) is rotatably mounted on the mounting plate (23). The fixed shearing disc (21) is provided with a locking member for locking the fixed shearing disc (21). Multiple first notches (211) are provided, each of which has a different width and is spaced along the circumference of the fixed shearing disc (21).

7. A rebar shearing machine as described in claim 1, characterized in that: The frame (1) is provided with casters at its bottom.

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