Movable iron sheet shearing machine

Abstract

The invention relates to the technical field of cutting equipment, and discloses a movable iron sheet shearing machine which comprises a chassis, a cutting assembly arranged on the chassis, supporting legs arranged on the lower side of the chassis and moving wheels arranged at the lower ends of the supporting legs. The cutting assembly comprises a first vertical pipe, a second vertical pipe, a shaft sleeve arranged at the upper end of the first vertical pipe, a rotating shaft arranged on the shaft sleeve, a tool bit fixed to one side of the rotating shaft and an ejector pin arranged on the second vertical pipe. Wherein the ejector pin and the tool bit are oppositely arranged; a crank is arranged at the outer side end of the rotating shaft, and the tool bit is driven to rotate relative to the ejector pin by rotating the crank so as to cut an iron sheet or a thin steel plate. The movable wheels move up and down along the supporting legs, convenient movement and stable supporting of equipment on a construction site are achieved, and the problems that in the prior art, equipment is inconvenient to move, strenuous to operate and poor in adaptability to the construction site can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of cutting equipment technology, specifically to a portable sheet metal shearing machine. Background Technology

[0002] In the processing of flue gas ducts and the construction of sheet metal insulation in municipal and civil engineering projects, it is often necessary to cut thin steel plates and sheet metal on-site. Traditional cutting methods mainly include the following: First, manual cutting with scissors, which is inefficient, labor-intensive, and the blades of the scissors are prone to wear, making it difficult to guarantee the processing quality; second, outsourcing the materials to a processing plant, which increases transportation costs, extends the construction period, and has poor dimensional flexibility; third, introducing large shearing machines, which are usually bulky, inconvenient to move, require cranes and other equipment, cannot be operated flexibly by a single person, and are very costly.

[0003] Therefore, there is an urgent need for a mobile sheet metal shearing machine that can adapt to the on-site construction environment, is flexible in movement, easy to operate, and inexpensive. Summary of the Invention

[0004] The purpose of this invention is to provide a mobile sheet metal cutting machine to solve the problem that existing small cutting equipment generally lacks convenient height adjustment function and stable mobile-fixed switching mechanism, making it difficult to meet the needs of complex construction sites.

[0005] According to one embodiment of the present invention, a movable sheet metal shearing machine is provided, comprising: a chassis, a cutting assembly disposed on the chassis, a support leg disposed on the lower side of the chassis, and a moving wheel disposed at the lower end of the support leg; wherein, The cutting assembly includes: a first riser and a second riser, a bushing disposed at the upper end of the first riser, a rotating shaft disposed on the bushing, a cutter head fixed to one side of the rotating shaft, and a ejector pin disposed on the second riser; wherein... The ejector pin is positioned opposite to the cutter head; A crank handle is provided at the outer end of the rotating shaft. By rotating the crank handle, the cutter head is driven to rotate relative to the ejector pin in order to cut sheet metal or thin steel plate.

[0006] In one embodiment, the support leg includes: an upper sleeve and a lower sleeve, wherein, Several first bolt holes are provided along the length of the upper sleeve; Several second bolt holes are provided along the length of the lower sleeve; The first bolt hole corresponds to the second bolt hole.

[0007] In one embodiment, the movable wheel is bolted to the lower sleeve, wherein, An elongated hole is provided on the lower sleeve, and the bolt is slidably disposed within the elongated hole; The bolt is used to drive the movable wheel to move up and down along the lower sleeve.

[0008] In one embodiment, the movable wheel is a steel roller.

[0009] In one embodiment, both the first riser and the second riser are square steel pipes.

[0010] As one embodiment, the cutting assembly further includes a spring, wherein, The spring is disposed between the cutter head and the bushing; The spring is used to provide pressure to bring the cutter head close to the ejector pin.

[0011] In one embodiment, the cutter head is conical.

[0012] As one embodiment, the crank handle includes: anti-slip texture and an outer rubber sleeve, wherein, The crank handle structure is connected to the rotating shaft sleeve.

[0013] In one embodiment, the chassis is made of steel plate; Handles are provided at both ends of the chassis.

[0014] In one implementation, the support legs are at least four.

[0015] Based on the above description and practice, the movable sheet metal shearing machine of this invention achieves flexible and reliable adjustment of the working height of the equipment through the adjustable support legs using upper and lower sleeves with multiple sets of bolt holes. This effectively adapts to the height requirements of different operators and uneven ground environments. By opening vertical elongated holes on the lower sleeve and cooperating with bolts, the moving wheels can be quickly raised and lowered, enabling the equipment to efficiently switch between a flexible moving state and a stable processing state. The crank handle drives the rotating shaft, causing the conical cutter head to rotate relative to the fixed ejector pin. Under the continuous pre-pressure provided by the spring, a stable and efficient shearing action is formed, significantly reducing the operator's labor intensity while ensuring the quality of the cut. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a portable sheet metal shearing machine according to one embodiment of the present invention.

[0017] Figure 2 This is a side view of a movable sheet metal shearing machine according to one embodiment of the present invention.

[0018] Figure 3This is a partial schematic diagram of a portable sheet metal shearing machine according to one embodiment of the present invention.

[0019] The attached figures are labeled as follows: 1. Chassis; 11. Handle; 2. Cutting assembly; 21. First riser; 211. Bushing; 212. Shaft; 2121. Crank handle; 213. Cutting head; 22. Second riser; 221. Ejector pin; 23. Spring; 3. Support leg; 31. Upper sleeve; 32. Lower sleeve; 321. Long hole; 4. Caster wheel; 5. Steel plate. Detailed Implementation

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0021] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0022] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] like Figures 1 to 3As shown in the illustration, this embodiment discloses a portable sheet metal shearing machine for use in construction sites such as flue gas duct processing and sheet metal insulation, for convenient cutting of thin steel plates 5 and sheet metal. The sheet metal shearing machine mainly includes a chassis 1, a cutting assembly 2, support legs 3, and casters 4. The chassis 1 supports the cutting assembly 2, which is mounted on the chassis 1. The support legs 3 are connected to the lower side of the chassis 1, supporting the main body of the equipment and allowing for height adjustment. The casters 4 are located at the lower end of the support legs 3, enabling the equipment to move easily between different workstations. The coordinated operation of all components enables rapid and efficient cutting of sheet metal or thin steel plates 5 at the construction site.

[0024] like Figure 1 As shown, the portable sheet metal shearing machine includes a chassis 1, a cutting assembly 2, support legs 3, and casters 4. The chassis 1 is made from a rectangular steel plate that has been cut and edge-treated. Its dimensions are determined according to the actual application scenario, typically with a length between 800mm and 1200mm, a width between 500mm and 800mm, and a thickness between 5mm and 10mm, to ensure sufficient structural strength and stability. The cutting assembly 2 is fixed to the upper surface of the chassis 1 by welding. The cutting assembly 2 includes a first vertical tube 21 and a second vertical tube 22, a bushing 211, a rotating shaft 212, a cutter head 213, and a ejector pin 221. The first vertical tube 21 and the second vertical tube 22 are vertically welded and fixed to the left and right sides of the upper surface of the chassis 1, respectively, with their axes facing each other to form a symmetrical structure. A bushing 211 is fixedly installed at the upper end of the first vertical tube 21. This bushing 211 has a cylindrical structure with smooth bearing holes machined inside. A rotating shaft 212 is rotatably mounted inside a bushing 211. A cutter head 213 is fixedly mounted on its inner end, and a crank handle 2121 is connected to its outer end. At the upper end of the second riser 22, a pin 221 is fixedly mounted opposite the cutter head 213. The tip of the pin 221 is positioned opposite the cutting edge of the cutter head 213, forming a cutting area between them. When the operator rotates the crank handle 2121, the rotating shaft 212 and the cutter head 213 rotate together, causing the cutter head 213 to move relative to the fixed pin 221, thus shearing the sheet metal or thin steel plate placed between them and completing the cutting operation. Four support legs 3 are provided, vertically fixed to the four corners of the lower surface of the chassis 1 by welding. Each support leg 3 has a caster wheel 4 at its lower end. The caster wheel 4 is a steel roller structure, characterized by high load-bearing capacity and good wear resistance. The combination of support leg 3 and moving wheel 4 allows the entire device to be moved easily when needed and to remain stable during operation.

[0025] Furthermore, the support leg 3 includes an upper sleeve 31 and a lower sleeve 32. The upper sleeve 31 is a square tubular structure with an open lower end; the lower sleeve 32 is also a square tubular structure, with its upper end inserted into the lower opening of the upper sleeve 31, forming a retractable sleeve structure. On the wall of the upper sleeve 31, first bolt holes are spaced along its length, typically between 50mm and 100mm apart. Correspondingly, second bolt holes are also spaced along the length of the lower sleeve 32, with the same spacing as the first bolt holes. When the height of the support leg 3 needs to be adjusted, the lower sleeve 32 is pulled out or pushed into the upper sleeve 31 to align a pair of first and second bolt holes. Then, a bolt is passed through the aligned bolt holes and secured with a nut, locking the support leg 3 at the desired height. This sleeve structure is easy to operate and can be flexibly adjusted according to the operator's height or the height of the worktable, effectively improving the applicability and operational comfort of the equipment. Both the upper sleeve 31 and the lower sleeve 32 are made of square steel tubing. The square structure effectively prevents relative rotation between the two sleeves, ensuring the stability of the support structure. The wall thickness of the sleeves is determined according to the load-bearing requirements, typically between 2mm and 4mm, which ensures sufficient structural strength while controlling the overall weight.

[0026] The first riser 21 and the second riser 22 can also be provided with corresponding bolt holes at their lower ends. By aligning a pair of bolt holes and fixing them with bolts, the first riser 21 and the second riser 22 can be adjusted to different heights, thereby achieving overall height adjustment.

[0027] Furthermore, the movable wheel 4 is adjustablely connected to the lower sleeve 32. Specifically, a vertical elongated hole 321 is provided on the lower wall of the lower sleeve 32. The length of the elongated hole 321 is determined according to the required lifting stroke of the movable wheel 4, typically 100mm to 200mm. The movable wheel 4 is mounted on a wheel frame via an axle. A connecting plate with a through hole is provided at the upper end of the wheel frame. During installation, bolts are passed sequentially through the elongated hole 321 on the lower sleeve 32 and the through hole on the wheel frame connecting plate, and then tightened with nuts. When the equipment needs to be moved, the nuts are first loosened so that the bolts can slide downward along the elongated hole 321, causing the movable wheel 4 to move down until it contacts the ground and lifts the entire support leg 3, so that the bottom end of the support leg 3 is off the ground. Then the nuts are tightened to fix the movable wheel 4 in this position, at which point the equipment is in a movable state. When the equipment is moved to the designated position for cutting operations, loosen the nut again to lift the moving wheel 4 so that the bottom of the support leg 3 directly contacts the ground. Then tighten the nut to fix it. At this time, the moving wheel 4 is retracted and lifted off the ground, and the equipment is in a stable working state. This moving wheel adjustment mechanism, which uses a long hole 321 and bolts for adjustment, has a simple and reliable structure, is easy to operate, and can quickly switch the equipment between moving and working states, greatly improving the practicality and work efficiency of the equipment.

[0028] Furthermore, the mobile wheel 4 is a steel roller. The wheel body of the mobile wheel 4 is machined from carbon structural steel, and the rim surface can be hardened to improve wear resistance. The diameter of the wheel body is determined according to the load and movement requirements of the equipment, and the width of the wheel body is determined according to the load-bearing requirements, typically between 30mm and 50mm. An axle hole is provided at the center of the wheel body, through which the wheel body is mounted on the wheel frame. The axle is made of high-quality carbon structural steel and has a rust-proof surface treatment. A rolling bearing can be installed between the axle and the wheel body to reduce movement resistance. The steel properties of the mobile wheel 4 give it high load-bearing capacity and wear resistance, enabling it to adapt to the rough surface environment of the construction site and preventing damage to the wheel body caused by ground debris. At the same time, steel rollers are low in cost and easy to maintain and replace. In some embodiments, a layer of rubber or polyurethane material can be coated on the rim surface of the steel roller to increase friction with the ground, reduce noise during movement, and prevent scratches on indoor floors.

[0029] Furthermore, both the first riser 21 and the second riser 22 are made of square steel tubing. Square steel tubing is characterized by high bending strength and good stability. The cross-sectional dimensions of the square steel tubing used for the first riser 21 and the second riser 22 are determined according to the stress requirements, typically using specifications of 40mm×40mm to 60mm×60mm, with a wall thickness between 2mm and 4mm. The four planes of the square steel tubing provide convenience for installing other components. For example, the mounting seat of the bushing 211 can be welded on one plane, and reinforcing ribs can be set on the opposite plane to enhance the rigidity and stability of the riser. The bottoms of the first riser 21 and the second riser 22 are fixedly connected to the base plate 1 by welding, ensuring that the two risers are parallel to each other and perpendicular to the upper surface of the base plate 1 during welding. At the upper part of the two risers, a height adjustment mechanism can be set as needed. Specifically, a sliding adjustment tube is fitted onto the main body of the riser and fixed at different heights by bolts to accommodate the cutting requirements of materials of different thicknesses. The hollow internal structure of square steel pipes not only reduces overall weight but also allows for the installation of transmission components or cables within the internal space. The surface of the riser can be treated with rust prevention methods, such as galvanizing or spraying with anti-rust paint, to extend its service life.

[0030] Furthermore, the cutting mechanism also includes a spring 23. The spring 23 is positioned between the cutter head 213 and the bushing 211, and its main function is to provide preload to keep the cutter head 213 always close to the ejector pin 221. The spring 23 is a cylindrical helical compression spring, typically made of spring steel, which has good elasticity and fatigue strength. One end of the spring 23 rests against the end face of the bushing 211, and the other end rests against the root of the cutter head 213 via a washer. When the rotating shaft 212 is installed inside the bushing 211, the spring 23 is in a compressed state, and the resulting elastic force pushes the cutter head 213 towards the ejector pin 221, eliminating the gap between the cutter head 213 and the ejector pin 221. This ensures that the cutter head 213 and the ejector pin 221 remain in contact during the cutting process, improving cutting stability and the quality of the cut surface. Simultaneously, the buffering effect of the spring 23 reduces impact vibrations generated during cutting, protecting transmission components and extending the equipment's service life.

[0031] Furthermore, the cutter head 213 is conical, made of high-carbon steel or alloy tool steel, and heat-treated to achieve high hardness and wear resistance. The basic shape of the cutter head 213 is conical, with its cone angle determined by the thickness and properties of the material being cut, typically between 30 and 60 degrees. The tip of the conical cutter head is ground into a sharp cutting edge for use in conjunction with the ejector pin 221 to achieve a shearing action. The tail of the cutter head 213 has a mounting hole for fixing to the rotating shaft 212 via a key or pin connection. The conical cutter head reduces the contact area between the cutter head and the material during cutting, concentrating the force and enabling material cutting with less operating force. Simultaneously, the conical structure gradually separates the material during rotary cutting, reducing cutting resistance and making the cutting process smoother. In some preferred embodiments, the cutter head 213 can be made from the valve of a used internal combustion engine. The valve stem is used as the mounting part, and the valve head is ground to form a tapered cutting edge. This not only reduces manufacturing costs and realizes the reuse of resources, but also the special steel used in the internal combustion engine valve has excellent wear resistance and strength, making it very suitable for use as a cutting tool.

[0032] Furthermore, the crank handle 2121 includes a grip portion and a connecting portion. The grip portion has a straight rod-shaped structure with anti-slip textures on its surface. These anti-slip textures can be straight lines, mesh patterns, or knurling, etc., to increase the friction between the hand and the crank handle and prevent slippage during operation. A rubber sleeve is also fitted on the outer surface of the grip portion. The rubber sleeve is made of natural or synthetic rubber and has appropriate elasticity and a coefficient of friction, which can improve grip comfort and further prevent hand slippage. The connecting portion is located at one end of the crank handle 2121, and its structure mates with the outer end of the rotating shaft 212. Specifically, the outer end of the rotating shaft 212 is machined into a polygonal cross-section, such as a hexagon, or has a keyway. The connecting portion of the crank handle 2121 is provided with a corresponding polygonal hole or key to achieve a sleeve connection with the rotating shaft 212. This detachable connection method facilitates the installation and replacement of the crank handle 2121, while reliably transmitting torque during use.

[0033] Furthermore, the chassis 1 is made of steel plate, which has the advantages of high strength and good stability. Handles 11 are provided on both sides of the chassis 1 to facilitate the movement of the sheet metal shearing machine by construction personnel. The steel plate is generally made of ordinary carbon structural steel, such as Q235 steel, and its thickness is determined according to the overall size of the equipment and load requirements. The shape of the chassis 1 is designed according to functional requirements, generally rectangular, and its dimensions must ensure sufficient stability for the equipment. Various mounting seats and reinforcing ribs can be welded to the upper surface of the chassis 1 according to the installation positions of each component. For example, reinforcing plates are welded at the locations where the first riser 21 and the second riser 22 are installed to enhance the rigidity of the installation area; lifting rings can be welded at the edges to facilitate equipment handling. A reinforcing structure is also required at the connection point between the lower surface of the chassis 1 and the support legs 3 to ensure the stability of the support. The edges of the chassis 1 are chamfered or rolled to eliminate sharp edges and improve safety. The steel plate surface is treated with rust prevention, such as sandblasting followed by rust-preventive paint, or hot-dip galvanizing, to adapt to the potentially humid environment at the construction site.

[0034] Furthermore, there are at least four support legs 3. In a preferred embodiment of the invention, four support legs 3 are installed at the four corners of the lower surface of the chassis 1. This four-point support method conforms to the principle of stability and can ensure that the equipment remains stable under various working conditions. Each support leg 3 has the same structure, adopting an adjustable height sleeve structure, including an upper sleeve 31 and a lower sleeve 32. The upper sleeves 31 of the four support legs 3 are fixedly connected to the chassis 1 by welding to form a stable support frame. By adjusting the height of the four support legs 3 respectively, the levelness of the chassis 1 can be adjusted to a certain extent to adapt to uneven ground. Each support leg 3 is provided with a liftable caster 4 at its lower end, which allows the equipment to be moved easily and fixed stably in the working position. The coordinated cooperation of the four support legs 3 provides reliable basic support for the equipment, ensuring the stability and accuracy of the cutting operation.

[0035] When using the portable sheet metal shearing machine of this invention, the equipment first needs to be moved to the working position. The operator loosens the bolts at the lower end of the support leg 3, moves the moving wheel 4 downwards until it contacts the ground and lifts the bottom end of the support leg 3 off the ground, and then tightens the bolts to fix the moving wheel 4. By pushing the handle on the equipment or directly pushing the chassis 1, the equipment is moved to the designated working position. After reaching the working position, the bolts are loosened again, the moving wheel 4 is lifted upwards so that the bottom end of the support leg 3 directly contacts the ground, and then the bolts are tightened to fix it. At this time, the equipment is in a stable working state. Next, the height of the support leg 3 is adjusted according to the height of the operator or the height of the worktable. The method is to loosen the fixing bolts between the upper sleeve 31 and the lower sleeve 32, pull the lower sleeve 32 to a suitable height, align the first bolt hole and the second bolt hole, and then insert the bolt and tighten the nut to fix it. The sheet metal or thin steel plate 5 to be cut is placed between the cutter head 213 and the ejector pin 221 to ensure that the material is completely in the cutting area. The operator holds the non-slip grip of the crank handle 2121 and rotates it clockwise or counterclockwise, which drives the cutter head 213 to rotate via the pivot 212. During rotation, the cutter head 213 moves relative to the fixed ejector pin 221, creating a shearing effect on the material. As the cutter head 213 continues to rotate, the material is gradually cut. After cutting, the operator rotates the crank handle 2121 in the opposite direction to return the cutter head 213 to its initial position, removes the cut material, and the next cutting operation can begin.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A portable sheet metal shearing machine, characterized in that, include: The chassis, the cutting assembly mounted on the chassis, the support legs mounted on the underside of the chassis, and the casters mounted on the lower ends of the support legs; wherein, The cutting assembly includes: a first riser and a second riser, a bushing disposed at the upper end of the first riser, a rotating shaft disposed on the bushing, a cutter head fixed to one side of the rotating shaft, and a ejector pin disposed on the second riser; wherein... The ejector pin is positioned opposite to the cutter head; A crank handle is provided at the outer end of the rotating shaft. By rotating the crank handle, the cutter head is driven to rotate relative to the ejector pin in order to cut sheet metal or thin steel plate.

2. The portable sheet metal shearing machine as described in claim 1, characterized in that, The support leg includes: an upper sleeve and a lower sleeve, wherein, Several first bolt holes are provided along the length of the upper sleeve; Several second bolt holes are provided along the length of the lower sleeve; The first bolt hole corresponds to the second bolt hole.

3. The portable sheet metal shearing machine as described in claim 2, characterized in that, The movable wheel is bolted to the lower sleeve, wherein... An elongated hole is provided on the lower sleeve, and the bolt is slidably disposed within the elongated hole; The bolt is used to drive the movable wheel to move up and down along the lower sleeve.

4. The portable sheet metal shearing machine as described in claim 1, characterized in that, The moving wheels are steel rollers.

5. The portable sheet metal shearing machine as described in claim 1, characterized in that, Both the first riser and the second riser are square steel pipes.

6. The portable sheet metal shearing machine as described in claim 1, characterized in that, The cutting assembly also includes a spring, wherein... The spring is disposed between the cutter head and the bushing; The spring is used to provide pressure to bring the cutter head close to the ejector pin.

7. The portable sheet metal shearing machine as described in claim 1, characterized in that, The cutting head is conical.

8. The portable sheet metal shearing machine as described in claim 1, characterized in that, The crank handle includes: anti-slip texture and an outer rubber sleeve, wherein... The crank handle structure is connected to the rotating shaft sleeve.

9. The portable sheet metal shearing machine as described in claim 1, characterized in that, The chassis is made of steel plate. Handles are provided on both sides of the chassis.

10. The portable sheet metal shearing machine as described in claim 1, characterized in that, The number of supporting legs is at least four.

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